August 30, LGD of the original groundbreaking ceremony in Guangzhou on the LCD panel, for some reason delayed.
"In early August we received a notice in Guangzhou City, was invited to Aug. 30 on behalf of the line held LGD8.5 groundbreaking ceremony, but last week they received a notice to postpone the ceremony started, some of this sudden change." August 29, a TV company in charge told reporters the case.
The reporter learned from the Guangzhou Development Zone area, the opening ceremony of the delay was unilaterally proposed by South Korea LGD, but the Guangzhou municipal government is still in communication with the LGD, LGD Guangzhou adding 8.5 generation line item will not be canceled , but no later than the end of 2011 should start.
In November last year, after approval by the State Development and Reform Commission, Samsung Electronics Suzhou and Guangzhou LGD 7.5-generation line of 8.5 generation line when the start has been the focus of the panel industry. While the former was started on May 30 this year, while the latter twists and turns.
"The delayed start is mainly LGD reasons, because of its LCD panel business for two consecutive quarters of losses led to its cash flow is very tight."
"Guangzhou LGD high-generation LCD panel to participate in the selection of items from the negotiations on spent more than two years, and received approval in the LGD of reasons, but because of delays started, including the project lead person, including the Guangzhou-related leaders are very anxious. "The Guangzhou Development Zone, the source said.
Guangzhou LGD project delayed in the industry led to much speculation. A source close to LGD's color TV industry, said, "The delayed start is mainly LGD reasons, because of its LCD panel business for two consecutive quarters of losses led to its cash flow is tight, the first phase of the current need to invest $ 7 billion not in place, followed by the Guangzhou municipal government on the contract details are still in some negotiations still not complete agreement. "
In fact, LGD side has been working with the Guangzhou municipal government and the downstream machine Skyworth strategic partners to communicate the reasons is its LCD panel industry changes over the past year.
As of August this year, the global LCD panel prices have dropped 14 consecutive months, at the same time, the global LCD TV shipments declined to only 7% increase, even during the first half of this year the Chinese market increased only 5%. In this case, only the second quarter of this year, the world's four major panel makers appeared 80 million net loss, and including Samsung, LGD of the five panel makers, including the operating rate has fallen to 75%.
With the BOE (Hefei 6 Line, Beijing 8th generation line), and Suzhou Huaxing Power Samsung four-generation production lines have been started and in 2012 the global oversupply of LCD panels will be more severe.
In addition, LGD delayed start also has its own reasons. Last March, in the 8.5 generation line item LGD Guangzhou Development and Reform Commission for approval, while awaiting its approval and fear can not miss the golden age of the LCD panel, in its native South Korea to start building the second 8.5-generation line.
It is noteworthy that, has been hoping for LGD-generation line item to promote industrial restructuring and upgrading of the Guangzhou Municipal Government, the LGD project not want to see is a continued delay in the amount of investment reached 40 billion, boosting GDP at least one thousand billion in major projects.
According to sources, once again postponed the ceremony, the LGD in the request, mainly in the first phase of funding is still difficult to place hope in Guangzhou, given some support in the capital, the two sides are still on the details of a new round of cooperation negotiations.
In fact, for Samsung, LGD and other foreign giants panels, its investment in China is still the inevitable choice, because 50% of global LCD TV production base in China, but also more critical of China's tariff policy is expected to adjust.
Samsung Group research report shows that China plans in early 2012 the LCD module tariffs from the current 5% to 8% -10%, while the corresponding sub-class of LCD TV products will also be the current tariff 3% to 8% level, for both Samsung and LGD they need to accelerate construction of the LCD panel plant in China, may increase in response to China's future plans related to tariffs. Guangzhou Development Zone, insiders say, LGD Guangzhou 8.5-generation line is still expected to start in the year.
LCD driver ic, serial lcd module
2011年8月23日星期二
Microcontroller-based solar cell phone charger solutions
Recently, people are considering solar mobile phone chargers for including a broader range of consumer electronics applications. Solar panels provide power is highly dependent on the working environment. This includes such optical density, time and location of such factors. Therefore, the battery is often used as energy storage unit. When more than electricity from solar panels when you can charge the battery; when the solar panels provide enough power, the battery that can power the system.
Currently on the market range of solar panels, solar panels, according to the different materials used can be divided into:
① silicon solar cells;
② the inorganic III-V compounds such as gallium arsenide, cadmium sulfide, copper indium selenium compounds such as multi-material solar cells;
③ functional polymer materials (organic semiconductor) solar cells prepared large;
④ nano-crystalline solar cells. We use a silicon solar cell.
2.1 Processor
Processor 51 series 89C51. Internal microcontroller has two timers, two external interrupts and a serial port interrupt, three eight-way I / O port, using a 12MHz crystal. SCM is the task of real-time collection by sampling circuit the solar panel output voltage and current, and battery charging status, the decision by calculating how the maximum output power of solar panels for charging batteries to find and identify the charge state.
2.2 Sampling part
If the current in the system to be tested on, you must first current signal is converted to voltage signal before the A / D conversion. The conversion method is commonly used to add precision resistors in the circuit, which the current signal into voltage signal. This method has the advantage of easy measurement, but this method when the current is very small, affect the measurement accuracy, making it difficult to choose a suitable resistance; Secondly, the current detection signal obtained after amplification to enter only through the circuit comparator, thus increasing the circuit complexity of debugging. Therefore, we can use current and voltage conversion chip MAX472, to overcome the existing conventional method of measuring the current measurement range is small, measurement error and other shortcomings, can improve the measurement accuracy, and can be used for precise control of the microcontroller.
Voltage and current samples using a serial A / D converter TLC0834, 8-bit resolution, and easy to use microprocessor interface or stand-alone work or full-scale reference voltage with 5V logic multiplexer address strobe of a single 4 or 8 input channels 5V power supply, input range 0 - 5V.
2.3 PWM control circuit
Controller uses pulse width modulation (PWM) control of the supply current.
By the microcontroller PWM generator PWM wave output circuit by controlling the main controller and interrupt the way it used to communicate, control the increase or decrease the pulse width. PWM signal back through the optical coupler drive the main road MOSFET.
Switch, diode, LC circuits switching power supply. By PWM control of switching power supply can reduce power consumption while allowing for digital control, but the bus ripple is relatively large.
Principle 3 Rechargeable Battery
Lithium-ion battery during charging or discharging the event of overcharge, over discharge or over-current, it will cause damage or reduce the life of the battery, lithium battery charge in Figure 3 for the curve is divided into three phases: pre-charge state, constant current charging and constant voltage charging phase.
Battery with 800mAh capacity, for example, charge termination voltage of 4.2V. With 1/10C (about 80mA) for constant current pre-charge the battery when the battery terminal voltage reaches the low voltage threshold V (min), with its 800mA (charge rate of 1C) constant current charging, the battery voltage to the start of a larger slope step, when the battery voltage approaches 4.2V, 4.2V constant voltage into the current gradually decreased and little change in voltage, charge current is reduced to 1/10C (about 80mA) when that close to full, you can terminate the charge.
4 Find the maximum output power point of solar
Looking for maximum power point, we use comparative methods to achieve specific approach is: first, collecting solar panel output voltage and current, calculate the power at this time, and continue collecting. Shown in Figure 4. In Figure 4, C-point and B point of comparison, such as large than or equal to point B, give a positive sign of power and position; such as hours than point B, give the right to place a negative sign. The point A than point B, such as large or equal, give the right to place a negative sign; point A than point B, such as hours, give a positive sign of power and position. When a relatively complete after three o'clock, if two positive numbers is a positive slope is the right place, should increase the output voltage and improve power output; if two negative numbers is negative then the slope of power and position, should reduce the output voltage, increase Output power; such as power and position to zero is a positive and negative peak that, without any changes. In A, B, C three-point power value of borrowing from point B to get the first foothold of power, then the first read point C power, and then from point C back to read A point power. Detection of three consecutive power values and to compare its size and then calculate the right bit value by the value of power and position to determine the starting point to move to point C, A point moves, or does not move. Although this method of computing time than the traditional slow disturbance observation maximum power point and the rapid changes in the amount of sunlight the maximum power point can not be reached, but can reduce the traditional observation of disturbance of unknown interference and to determine the error caused by power loss , the effect on the control are acceptable.
touch screen interface， lcd drive module
Currently on the market range of solar panels, solar panels, according to the different materials used can be divided into:
① silicon solar cells;
② the inorganic III-V compounds such as gallium arsenide, cadmium sulfide, copper indium selenium compounds such as multi-material solar cells;
③ functional polymer materials (organic semiconductor) solar cells prepared large;
④ nano-crystalline solar cells. We use a silicon solar cell.
2.1 Processor
Processor 51 series 89C51. Internal microcontroller has two timers, two external interrupts and a serial port interrupt, three eight-way I / O port, using a 12MHz crystal. SCM is the task of real-time collection by sampling circuit the solar panel output voltage and current, and battery charging status, the decision by calculating how the maximum output power of solar panels for charging batteries to find and identify the charge state.
2.2 Sampling part
If the current in the system to be tested on, you must first current signal is converted to voltage signal before the A / D conversion. The conversion method is commonly used to add precision resistors in the circuit, which the current signal into voltage signal. This method has the advantage of easy measurement, but this method when the current is very small, affect the measurement accuracy, making it difficult to choose a suitable resistance; Secondly, the current detection signal obtained after amplification to enter only through the circuit comparator, thus increasing the circuit complexity of debugging. Therefore, we can use current and voltage conversion chip MAX472, to overcome the existing conventional method of measuring the current measurement range is small, measurement error and other shortcomings, can improve the measurement accuracy, and can be used for precise control of the microcontroller.
Voltage and current samples using a serial A / D converter TLC0834, 8-bit resolution, and easy to use microprocessor interface or stand-alone work or full-scale reference voltage with 5V logic multiplexer address strobe of a single 4 or 8 input channels 5V power supply, input range 0 - 5V.
2.3 PWM control circuit
Controller uses pulse width modulation (PWM) control of the supply current.
By the microcontroller PWM generator PWM wave output circuit by controlling the main controller and interrupt the way it used to communicate, control the increase or decrease the pulse width. PWM signal back through the optical coupler drive the main road MOSFET.
Switch, diode, LC circuits switching power supply. By PWM control of switching power supply can reduce power consumption while allowing for digital control, but the bus ripple is relatively large.
Principle 3 Rechargeable Battery
Lithium-ion battery during charging or discharging the event of overcharge, over discharge or over-current, it will cause damage or reduce the life of the battery, lithium battery charge in Figure 3 for the curve is divided into three phases: pre-charge state, constant current charging and constant voltage charging phase.
Battery with 800mAh capacity, for example, charge termination voltage of 4.2V. With 1/10C (about 80mA) for constant current pre-charge the battery when the battery terminal voltage reaches the low voltage threshold V (min), with its 800mA (charge rate of 1C) constant current charging, the battery voltage to the start of a larger slope step, when the battery voltage approaches 4.2V, 4.2V constant voltage into the current gradually decreased and little change in voltage, charge current is reduced to 1/10C (about 80mA) when that close to full, you can terminate the charge.
4 Find the maximum output power point of solar
Looking for maximum power point, we use comparative methods to achieve specific approach is: first, collecting solar panel output voltage and current, calculate the power at this time, and continue collecting. Shown in Figure 4. In Figure 4, C-point and B point of comparison, such as large than or equal to point B, give a positive sign of power and position; such as hours than point B, give the right to place a negative sign. The point A than point B, such as large or equal, give the right to place a negative sign; point A than point B, such as hours, give a positive sign of power and position. When a relatively complete after three o'clock, if two positive numbers is a positive slope is the right place, should increase the output voltage and improve power output; if two negative numbers is negative then the slope of power and position, should reduce the output voltage, increase Output power; such as power and position to zero is a positive and negative peak that, without any changes. In A, B, C three-point power value of borrowing from point B to get the first foothold of power, then the first read point C power, and then from point C back to read A point power. Detection of three consecutive power values and to compare its size and then calculate the right bit value by the value of power and position to determine the starting point to move to point C, A point moves, or does not move. Although this method of computing time than the traditional slow disturbance observation maximum power point and the rapid changes in the amount of sunlight the maximum power point can not be reached, but can reduce the traditional observation of disturbance of unknown interference and to determine the error caused by power loss , the effect on the control are acceptable.
touch screen interface， lcd drive module
2011年8月17日星期三
"An angry bird," the story behind
Since the iPhone as the smartphone market, one of the mainstream, not only changed the majority of people use cell phones, many cell phone game industry have also catch this wave of apple boom, and then introduced various new and interesting games. Although the price of these games are generally not high, and even can be quite inexpensive, but its impact on the overall gaming market forces can be said not to be underestimated, even for handheld games manufacturers Sony and Nintendo feel threatened. Apple has long been occupied and pay to download games first "angry bird (Angry Birds)", this wave can be called the biggest beneficiaries of the apple craze. "An angry bird," not only has a very impressive record in the world of downloads, even if the phone is not smart people, certainly in the movie promotional video, PSP, or even a browser to see them in applications such as presence ! "An angry bird," the developer Rovio Mobile is the second after Nokia in Finland, one of the most successful, but perhaps you do not know, Rovio Mobile in the "angry bird" previously developed over 51 games, and in 2009 early, Rovio Mobile almost faced bankruptcy. However, what an opportunity they create a best-selling worldwide, almost all ages love the phone all game?
The time to take a glimpse of the players, "an angry bird" behind the secrets behind the production, look at a few lovely but feisty bird, what to bring to the market how the whole game sort of inspiration. s
Rovio Mobile's rise in 2003, Rovio Mobile's founder - Nicholas? Hart in his studying at the University of Helsinki, Nokia and HP participated in the design competition sponsored mobile games. He and two other teammates to a real-time multiplayer game "Cabbage King (King of the Cabbage World)" won the championship. They therefore one with the game plan, then worked at HP's Peter? Vista Barker formed a deep bond, Vista Buck was the potential for them to make the game feel very surprised, but also encourage them to make more games to gain experience.
Nicholas followed in 2004, "Cabbage King" sold the copyright Sumea (now Digital Chocolate, representative works are "big military onslaught," "zombie Full House" etc.), and founder of the funds Games Relude. He invited his brother Michael? Hurd as the company's executive director, and to contract for Sumea game development work as the most important source of income. In the same year at the end, Relude officially changed its name to Rovio, when Mike's father - venture capitalists - QIAGEN? Hart saw the mobile phone market because of the potential, then large-scale investment in the Rovio around 1 million euros, the company expanded to 50 scale human scale. However, while a company's prospects seem promising, but then as CEO of Mike's worried the current situation, he believes blindly for the other major game companies outsourcing work is certainly quite stable, but he hopes the company can develop a long-term goals, and strengthen the relevant marketing capacity to create in the future sufficient to represent a company's work. But as a major investor in the company, but also he has with his father QIAGEN hold the opposite view, in the twists and turns later, Michael angrily decided to leave the company in 2005, and instead engaged in the printing-related work.
TFT lcd module
The time to take a glimpse of the players, "an angry bird" behind the secrets behind the production, look at a few lovely but feisty bird, what to bring to the market how the whole game sort of inspiration. s
Rovio Mobile's rise in 2003, Rovio Mobile's founder - Nicholas? Hart in his studying at the University of Helsinki, Nokia and HP participated in the design competition sponsored mobile games. He and two other teammates to a real-time multiplayer game "Cabbage King (King of the Cabbage World)" won the championship. They therefore one with the game plan, then worked at HP's Peter? Vista Barker formed a deep bond, Vista Buck was the potential for them to make the game feel very surprised, but also encourage them to make more games to gain experience.
Nicholas followed in 2004, "Cabbage King" sold the copyright Sumea (now Digital Chocolate, representative works are "big military onslaught," "zombie Full House" etc.), and founder of the funds Games Relude. He invited his brother Michael? Hurd as the company's executive director, and to contract for Sumea game development work as the most important source of income. In the same year at the end, Relude officially changed its name to Rovio, when Mike's father - venture capitalists - QIAGEN? Hart saw the mobile phone market because of the potential, then large-scale investment in the Rovio around 1 million euros, the company expanded to 50 scale human scale. However, while a company's prospects seem promising, but then as CEO of Mike's worried the current situation, he believes blindly for the other major game companies outsourcing work is certainly quite stable, but he hopes the company can develop a long-term goals, and strengthen the relevant marketing capacity to create in the future sufficient to represent a company's work. But as a major investor in the company, but also he has with his father QIAGEN hold the opposite view, in the twists and turns later, Michael angrily decided to leave the company in 2005, and instead engaged in the printing-related work.
TFT lcd module
2011年8月15日星期一
Huaxing Power want to build China's LCD "Huangpu"
August 8, Guangming New District, Shenzhen sunshine. In the days of sweet-scented osmanthus fragrance, Shenzhen Huaxing Electric Technology Co., Ltd. (hereinafter referred to as "Huaxing Power"), the first 8.5-generation TFT-LCD panel production line officially put into operation, marking the Chinese mainland to rely on independent innovation and independent development of the highest-generation TFT-LCD panel operation projects to full production stage. This will serve as China's electronic information industry, an important milestone in the history of events and history.
Breakthrough "screen" barrier stabilizing the upstream supply
Huaxing power commissioning of the project will alleviate the domestic TV industry "lack of screen pain."
China Video Industry Association released data show that last year in China color TV shipments of approximately 118 million units, accounting for global TV shipments 49%, of which nearly 90 million LCD TV sets. Estimated that the demand for LCD TV in mainland China will reach 46 million units, while billions of dollars of total shipments in Taiwan will reach 108 million units.
The core components in the LCD TV TFT-LCD panels in mainland China rely heavily on imports. Although China is the world's largest LCD TV sales market and manufacturing base, but the machine manufacturers and suppliers to negotiate an international panel is still at a disadvantage, the cost of LCD panel is very vulnerable to international price fluctuations. To reverse this passive situation, Huaxing Electric decided to be launched simultaneously in technology and international basic 8.5-generation TFT-LCD panel production line.
TCL, Li Dongsheng, chairman of Huaxing power to the "China Electronics News" reporter, Huaxing Power 8.5-generation TFT-LCD panel project by the TCL Group and deep ultra-Technology Investment Co., Ltd. was established with a total investment of 24.5 billion yuan in Shenzhen Jianshiyilai the largest investment in industrial projects, the Chinese mainland's first introduction of technology does not rely on independent innovation and building the highest-generation LCD panel production line.
Huaxing Power first 8.5 generation LCD panel production the project will achieve from 26 inches to 55 inches LCD TV panel full range of mainstream domestic production, domestic color TV industry for many years to alleviate the "lack of screen pain."
Huaxing Power TFT-LCD project went into operation for the development of China's color TV industry has an important significance. "Commissioning of the project will improve China's LCD TV industry dependent on foreign imports of the core components of the current situation, China's LCD TV industry chain to promote the formation and healthy, and sustainable development." Li Dongsheng said.
Ministry of Industry and Information Technology Ding Wenwu, deputy director of electronic information that Huaxing Power 8.5 generation LCD panel production line, marking the Pearl River Delta development of the consumer electronics chain has increased the most critical part for reversing the LCD panel to rely heavily on imported the passive situation, enhance the market competitiveness of the whole industry is significant.
Huaxing power projects put into production to become the TCL Group, Samsung, LG, Sharp, Panasonic and other Japanese and Korean companies, the LCD TV industry in the vertical integration with upstream and downstream of the first Chinese companies, open up the liquid crystal display to achieve the strategic objectives of the industrial chain, international competitiveness will be further enhanced.
Ministry of Industry and Information Technology Week, chief economist of the child learn that relatively complete industrial chain of multinational companies such as Samsung, LG, from raw materials, equipment, until the whole coverage, basically the whole industrial chain business. China to develop flat panel display industry, business entities must focus on the upstream and downstream industry chain extension.
Huaxing power production, the South China LCD TV industry will provide a stable supply of the upstream, helping manufacturers of color TV sets in the supply chain efficiency, cost control, market reaction and so the ability to substantially increase. This is also located in the Pearl River Delta Konka, Skyworth, color TV sets to improve the market competitiveness of enterprises is also important.
Extended support to enhance industry "stickiness"
Shenzhen - Huizhou - Pearl River Delta LCD industry support group being formed.
Huaxing power-generation TFT-LCD panel project led electronic glass substrates, color filters, polarizers, photoresist materials, chemical materials, liquid crystal, LED light source and other downstream industries, to enhance China's flat panel display industry's international competitiveness to promote industrial upgrading and restructuring.
It is understood, and Huaxing power before the project is also supporting an orderly manner, with Huaxing power core, and the whole Pearl River Delta, Shenzhen is a complete flat panel display supporting industries.
Vice Governor of Guangdong Province, Chen Yin said, Huaxing Power 8.5-generation LCD panel production line put into operation in Shenzhen, southern China to fill the high-generation LCD panel in the blank field, will bring the glass substrates, color filters, polarizers and other chain upstream and downstream industries associated with the accelerated accumulation of the perfect flat panel display industry chain, enhance independent innovation capability, enhance the electronic information industry's overall competitiveness, accelerate industrial transformation and upgrading of strategic importance.
Reporters noted that Huaxing power plant in a bright new district will be synchronized color filter production. In addition, Japan's Asahi Glass TFT-LCD glass substrate project was June 23 this year, officially started construction, mass production in Q3 2012.
In addition, Huaxing Electric also recently signed a strategic partnership with LG Chem, letter of intent, in the flat panel display with a polarizer, photoresist materials such areas as technology and production business in partnership with Taiwan's Wang Qi Technology signed a joint venture between the LED light.
Insiders pointed out that around Huaxing power-generation TFT-LCD project, is to form an annual output of over hundreds of billions of Shenzhen - Huizhou - Pearl River Delta LCD industry support group.
Shenzhen Party Secretary Wang Rong affirmed Huaxing Power-generation panel project on sustainable development of China's flat panel display industry, the important value. He believes that as China's own development, the highest-generation serial LCD panel production line, Huaxing power projects put into operation marked the Shenzhen and Guangdong's electronic information industry and towards a new level.
Innovation to create a new model of cooperation.
serial LCD display
Breakthrough "screen" barrier stabilizing the upstream supply
Huaxing power commissioning of the project will alleviate the domestic TV industry "lack of screen pain."
China Video Industry Association released data show that last year in China color TV shipments of approximately 118 million units, accounting for global TV shipments 49%, of which nearly 90 million LCD TV sets. Estimated that the demand for LCD TV in mainland China will reach 46 million units, while billions of dollars of total shipments in Taiwan will reach 108 million units.
The core components in the LCD TV TFT-LCD panels in mainland China rely heavily on imports. Although China is the world's largest LCD TV sales market and manufacturing base, but the machine manufacturers and suppliers to negotiate an international panel is still at a disadvantage, the cost of LCD panel is very vulnerable to international price fluctuations. To reverse this passive situation, Huaxing Electric decided to be launched simultaneously in technology and international basic 8.5-generation TFT-LCD panel production line.
TCL, Li Dongsheng, chairman of Huaxing power to the "China Electronics News" reporter, Huaxing Power 8.5-generation TFT-LCD panel project by the TCL Group and deep ultra-Technology Investment Co., Ltd. was established with a total investment of 24.5 billion yuan in Shenzhen Jianshiyilai the largest investment in industrial projects, the Chinese mainland's first introduction of technology does not rely on independent innovation and building the highest-generation LCD panel production line.
Huaxing Power first 8.5 generation LCD panel production the project will achieve from 26 inches to 55 inches LCD TV panel full range of mainstream domestic production, domestic color TV industry for many years to alleviate the "lack of screen pain."
Huaxing Power TFT-LCD project went into operation for the development of China's color TV industry has an important significance. "Commissioning of the project will improve China's LCD TV industry dependent on foreign imports of the core components of the current situation, China's LCD TV industry chain to promote the formation and healthy, and sustainable development." Li Dongsheng said.
Ministry of Industry and Information Technology Ding Wenwu, deputy director of electronic information that Huaxing Power 8.5 generation LCD panel production line, marking the Pearl River Delta development of the consumer electronics chain has increased the most critical part for reversing the LCD panel to rely heavily on imported the passive situation, enhance the market competitiveness of the whole industry is significant.
Huaxing power projects put into production to become the TCL Group, Samsung, LG, Sharp, Panasonic and other Japanese and Korean companies, the LCD TV industry in the vertical integration with upstream and downstream of the first Chinese companies, open up the liquid crystal display to achieve the strategic objectives of the industrial chain, international competitiveness will be further enhanced.
Ministry of Industry and Information Technology Week, chief economist of the child learn that relatively complete industrial chain of multinational companies such as Samsung, LG, from raw materials, equipment, until the whole coverage, basically the whole industrial chain business. China to develop flat panel display industry, business entities must focus on the upstream and downstream industry chain extension.
Huaxing power production, the South China LCD TV industry will provide a stable supply of the upstream, helping manufacturers of color TV sets in the supply chain efficiency, cost control, market reaction and so the ability to substantially increase. This is also located in the Pearl River Delta Konka, Skyworth, color TV sets to improve the market competitiveness of enterprises is also important.
Extended support to enhance industry "stickiness"
Shenzhen - Huizhou - Pearl River Delta LCD industry support group being formed.
Huaxing power-generation TFT-LCD panel project led electronic glass substrates, color filters, polarizers, photoresist materials, chemical materials, liquid crystal, LED light source and other downstream industries, to enhance China's flat panel display industry's international competitiveness to promote industrial upgrading and restructuring.
It is understood, and Huaxing power before the project is also supporting an orderly manner, with Huaxing power core, and the whole Pearl River Delta, Shenzhen is a complete flat panel display supporting industries.
Vice Governor of Guangdong Province, Chen Yin said, Huaxing Power 8.5-generation LCD panel production line put into operation in Shenzhen, southern China to fill the high-generation LCD panel in the blank field, will bring the glass substrates, color filters, polarizers and other chain upstream and downstream industries associated with the accelerated accumulation of the perfect flat panel display industry chain, enhance independent innovation capability, enhance the electronic information industry's overall competitiveness, accelerate industrial transformation and upgrading of strategic importance.
Reporters noted that Huaxing power plant in a bright new district will be synchronized color filter production. In addition, Japan's Asahi Glass TFT-LCD glass substrate project was June 23 this year, officially started construction, mass production in Q3 2012.
In addition, Huaxing Electric also recently signed a strategic partnership with LG Chem, letter of intent, in the flat panel display with a polarizer, photoresist materials such areas as technology and production business in partnership with Taiwan's Wang Qi Technology signed a joint venture between the LED light.
Insiders pointed out that around Huaxing power-generation TFT-LCD project, is to form an annual output of over hundreds of billions of Shenzhen - Huizhou - Pearl River Delta LCD industry support group.
Shenzhen Party Secretary Wang Rong affirmed Huaxing Power-generation panel project on sustainable development of China's flat panel display industry, the important value. He believes that as China's own development, the highest-generation serial LCD panel production line, Huaxing power projects put into operation marked the Shenzhen and Guangdong's electronic information industry and towards a new level.
Innovation to create a new model of cooperation.
serial LCD display
2011年8月10日星期三
Technical "risk" management to "moderate"
Since 2004, Hisense LCD TV that started preparations for the module project. Beginning not only faced many difficulties, lack of industry experience, lack of technology, process and other personnel, the lack of upstream resources, support, and faced with peer and upper panel of the cooperative enterprise and understand a lot of suspicion. Some colleagues believe that Hisense is knowing that they are impossible, some panel enterprises are concerned about the "looting of their livelihood": "Why do you do to make their own modules? What modules you want, we help you develop them good. "panel there is a spur of the moment companies that Hisense, Hisense have long questioned the strength to do so, confident and fully prepared.
Among the various voices of doubt in 2007, Hisense developed the first of China's color TV LCD module, and built the first Chinese color TV industry, lcd module serial port production line. Breaking almost all of China's LCD module status of foreign, get rid of so many people doubt! Present, Hisense has formed a five LCD module production line, annual capacity of 1.5 million products reached international advanced level.
In the multimedia field in 2008, Hisense another "adventure" success, leadership launched a self-developed China's first, world's thinnest LED LCD TV and mass market, becoming one of the world to mass-produced LED backlight LCD TV only three the only Chinese enterprise in the business. In emerging industries, created the world's third largest Hisense Intelligent Transportation standards; become the world's first and only company currently developing and successfully self-10G PON Media Converter parts manufacturing business ... ... technology "adventures" results continue to emerge, to promote Hisense Group of industries and industries to high-end high-end extension, surrounded by bigger and stronger Hisense dream into reality step by step: Hisense flat-panel TV has been for six consecutive years in China's color TV market ranked first in all brands and abroad, has lead still further extended; devaluation from 13 years ago, inverter air conditioner in China, to focus on conversion, to launch the world's leading 360 ° full DC inverter air conditioning and top energy-saving dual-mode air-conditioning, Hisense has been occupied for 13 consecutive years, Chinese domestic inverter air conditioner market top; color from the first CDMA phone to launch the first line of 3G mobile phone standard products, Hisense had been in the Chinese mobile terminal at the forefront of design technology; not only the field of optical communication industry in China's major supplier, and in North America, "FTTH" Hisense photoelectric conversion products in the market share of over 70%; Hisense intelligent transportation system through rigorous international bidding process, the success of digital services the Beijing 2008 Olympics intelligent traffic engineering, intelligent transportation scheduling system wide Hisense intelligence applied to the transformation of China's urban public transport, the de facto standard in China ... ....
Technically, "adventure" may recognize from Hisense and such a creed: "The market economy is dominated by technology and the ultimate consumer, which is the objective needs of market competition is the law of reaction. Determine the elements of the competitiveness of products quality, functionality , performance, cost, product form, time to market, without exception, these elements are mainly from the R & D play a decisive role. "
For years, Hisense has maintained an annual growth rate of about 25%, and enterprise efficiency has been maintained in parallel with the scale, the fact that, in the development of several jumping phase of technological innovation played a key role.
A motion often say, "technology Hisense, which means: no technology, Hisense not become famous; the core technology, we can not control their own destiny! No intellectual property rights of this DNA," a hundred years Hisense "can only be a dream. Summary Hisense 40-year history, especially since the market economy ten years, we deeply realize that technological innovation is the fundamental Hisense leapfrog development and security. "
Hisense 40 years of development, technical contribution is the first one, but technology is also included in the Hisense A motion casting "world brand" and "character Scriptures," the first.
serial lcd touch
Among the various voices of doubt in 2007, Hisense developed the first of China's color TV LCD module, and built the first Chinese color TV industry, lcd module serial port production line. Breaking almost all of China's LCD module status of foreign, get rid of so many people doubt! Present, Hisense has formed a five LCD module production line, annual capacity of 1.5 million products reached international advanced level.
In the multimedia field in 2008, Hisense another "adventure" success, leadership launched a self-developed China's first, world's thinnest LED LCD TV and mass market, becoming one of the world to mass-produced LED backlight LCD TV only three the only Chinese enterprise in the business. In emerging industries, created the world's third largest Hisense Intelligent Transportation standards; become the world's first and only company currently developing and successfully self-10G PON Media Converter parts manufacturing business ... ... technology "adventures" results continue to emerge, to promote Hisense Group of industries and industries to high-end high-end extension, surrounded by bigger and stronger Hisense dream into reality step by step: Hisense flat-panel TV has been for six consecutive years in China's color TV market ranked first in all brands and abroad, has lead still further extended; devaluation from 13 years ago, inverter air conditioner in China, to focus on conversion, to launch the world's leading 360 ° full DC inverter air conditioning and top energy-saving dual-mode air-conditioning, Hisense has been occupied for 13 consecutive years, Chinese domestic inverter air conditioner market top; color from the first CDMA phone to launch the first line of 3G mobile phone standard products, Hisense had been in the Chinese mobile terminal at the forefront of design technology; not only the field of optical communication industry in China's major supplier, and in North America, "FTTH" Hisense photoelectric conversion products in the market share of over 70%; Hisense intelligent transportation system through rigorous international bidding process, the success of digital services the Beijing 2008 Olympics intelligent traffic engineering, intelligent transportation scheduling system wide Hisense intelligence applied to the transformation of China's urban public transport, the de facto standard in China ... ....
Technically, "adventure" may recognize from Hisense and such a creed: "The market economy is dominated by technology and the ultimate consumer, which is the objective needs of market competition is the law of reaction. Determine the elements of the competitiveness of products quality, functionality , performance, cost, product form, time to market, without exception, these elements are mainly from the R & D play a decisive role. "
For years, Hisense has maintained an annual growth rate of about 25%, and enterprise efficiency has been maintained in parallel with the scale, the fact that, in the development of several jumping phase of technological innovation played a key role.
A motion often say, "technology Hisense, which means: no technology, Hisense not become famous; the core technology, we can not control their own destiny! No intellectual property rights of this DNA," a hundred years Hisense "can only be a dream. Summary Hisense 40-year history, especially since the market economy ten years, we deeply realize that technological innovation is the fundamental Hisense leapfrog development and security. "
Hisense 40 years of development, technical contribution is the first one, but technology is also included in the Hisense A motion casting "world brand" and "character Scriptures," the first.
serial lcd touch
2011年8月8日星期一
China-made 8.5-generation LCD line north-south pattern of the current competitive
China panel display industry a step forward. Yesterday, the TCL Group and the Shenzhen Municipal Government invested 24.5 billion yuan construction Huaxing 8.5 generation LCD line project was formally put into production. Just 40 days ago, BOE Beijing Yizhuang 8.5 cable project has just put into production. These two projects to enhance the domestic panel display industry's competitiveness and the right to speak, at the same time the two projects on the north and south sports drama.
According to reports, Huaxing Power Line Project 8.5 The main products 26-32 inches, 46 inch and 55-inch LCD panel, is expected monthly capacity of 100,000 substrates, produce 17.5 million TV module. Fourth quarter of this year will reach volume production, full production end of 2012. According Huaxing Electric CEO Chengming introduction, put into half of the TCL brand within the digestive capacity, the other half of the production to give other companies to provide upstream support, the company will gradually expand the export share. In fact, the end of June this year, BOE 8.5 generation line operation in Beijing, the project has taken the lead, electrical products and products covered Huaxing same size.
Since 2004, the rapid development of China's LCD TV industry, but the "lack of core small screen" of the pain has been plagued industry. Yesterday, at the commissioning ceremony Chengming with Huaxing power projects in operation, China's lack of core panel display industry, the situation will be the end of a small screen. He also said, "We project another 8.5-generation production line than the domestic savings of 15% of project funds." Although not point out names, but Huaxing power and the secret battle between the BOE has been self-evident.
TCL is responsible for aspects related to the reporter, is expected to put into the project by four months the industry will be able to reach the average yield level of 85%, is currently in pre-production stage. In this regard, industry analysts Liangzhen Peng pointed out that the LCD panel production line early, will face a "low yield" objective reality, Huaxing power projects for how to improve yields is the most critical issue, because the yield increase on can rapidly reduce costs. Another analyst who declined to be named, said, Huaxing power projects have the greatest advantage is the stability of the sea TCL, as a stable ship means that cash can be quickly withdrawn from circulation, which is essential for the expansion of industrial scale.
However, the domestic industry on behalf of two 8.5 lines still worried about the future international competition. Liang Zhenpeng that mainland China's high-generation panel production line in the face after Japan and South Korea and China Taiwan region with companies such tremendous competitive pressure, these companies must be put into operation in the efforts to resolve their own core technology in the LCD panel, basic patents, manufacturing processes , R & D personnel and other deficiencies, it was possible in two or three years to gradually gain a firm foothold.
LCD display driver
According to reports, Huaxing Power Line Project 8.5 The main products 26-32 inches, 46 inch and 55-inch LCD panel, is expected monthly capacity of 100,000 substrates, produce 17.5 million TV module. Fourth quarter of this year will reach volume production, full production end of 2012. According Huaxing Electric CEO Chengming introduction, put into half of the TCL brand within the digestive capacity, the other half of the production to give other companies to provide upstream support, the company will gradually expand the export share. In fact, the end of June this year, BOE 8.5 generation line operation in Beijing, the project has taken the lead, electrical products and products covered Huaxing same size.
Since 2004, the rapid development of China's LCD TV industry, but the "lack of core small screen" of the pain has been plagued industry. Yesterday, at the commissioning ceremony Chengming with Huaxing power projects in operation, China's lack of core panel display industry, the situation will be the end of a small screen. He also said, "We project another 8.5-generation production line than the domestic savings of 15% of project funds." Although not point out names, but Huaxing power and the secret battle between the BOE has been self-evident.
TCL is responsible for aspects related to the reporter, is expected to put into the project by four months the industry will be able to reach the average yield level of 85%, is currently in pre-production stage. In this regard, industry analysts Liangzhen Peng pointed out that the LCD panel production line early, will face a "low yield" objective reality, Huaxing power projects for how to improve yields is the most critical issue, because the yield increase on can rapidly reduce costs. Another analyst who declined to be named, said, Huaxing power projects have the greatest advantage is the stability of the sea TCL, as a stable ship means that cash can be quickly withdrawn from circulation, which is essential for the expansion of industrial scale.
However, the domestic industry on behalf of two 8.5 lines still worried about the future international competition. Liang Zhenpeng that mainland China's high-generation panel production line in the face after Japan and South Korea and China Taiwan region with companies such tremendous competitive pressure, these companies must be put into operation in the efforts to resolve their own core technology in the LCD panel, basic patents, manufacturing processes , R & D personnel and other deficiencies, it was possible in two or three years to gradually gain a firm foothold.
LCD display driver
2011年8月7日星期日
Competitive differentiation: appliances break a new path
Home appliances in general are under the influence of external pressure in the difficult operating environment, competitive differentiation has become the new home appliance giant, break the path.
It is understood that in a Ren Changhong Group Chairman Zhao Yong, the coordinate of its strategy to develop the industry in three major directions of the extension, Changhong color TV business in Changhong revenue contribution grew from the original 80% to less than 40%, However, Hisense, Skyworth and other competitors from CRT to flat panel to seize the opportunity to upgrade, especially in flat-panel TVs LCD TVs to complete the go-ahead.
Changhong Group Chairman Lin Maoxiang multimedia industry pointed out that "in the upgrade from CRT to flat panel Changhong has lagged behind, which Changhong living in the Mainland, the slow response, but with a new round of industrial upgrading and intelligence era, we are extremely well prepared, and the current gap with rivals in the market has been greatly reduced. "
Situation from 2010, Changhong sold more than 100 million units of plasma TVs, LCD TVs, especially LED LCD TV Changhong up 40%, while CRT TV, including TV with overall shipments rising to the second position.
"Through product differentiation combined market share of the industry return to the first, it is our goal, specifically, the next three years will maintain 20% -25% growth rate." Lin Maoxiang the case said.
It is reported that Changhong will be in 2011 as a strengthening of competition, 2012 to enter the change of competition, 2013 reflect the competitive and comprehensive than the industry leader in 2013 after China's flat panel industry continues to lead the brand, including plasma TVs continue to remain the industry leader .
Specifically, Changhong plasma TV in the ultra-thin, energy-saving technological breakthroughs as well as the perfect combination of 3D display technology, its market position further. According to reports, Changhong June this year all the plasma TV all the 3D technology, as the industry's first proposal to completely eliminate 2D television business, it shows its 3D television remains positive, the Changhong seems plasma is 3D TV the best carrier.
It is worth noting that this year both the Chinese market or the global plasma TV market in 2010 continued the strong growth in China since April this year, of which the plasma TV market simultaneous growth of 69 percent over the same period LCD TV shipment growth of only seven %, many of the original withdrawal of the plasma TV camp color TV manufacturers started to re-launch of plasma products.
Obviously the flat panel TV Changhong out a differentiated way, but in the LCD TV joint venture between Changhong and AUO LCD TFT module plant plans to continue to invest, which will Changhong LCD TVs, especially LCD LED shipment growth to create the conditions.
In Lin Maoxiang view, Changhong color TV to become the leading brand in the world, because the right to re-define consumer electronics companies like Apple to transfer the U.S., China and South Korea's color TV enterprises have gradually returned to the same starting line, especially the domestic LCD panel , plasma screens and chips make up after a short board, Samsung, LG Electronics to build the advantage of relying on the industry chain is gradually lost.
Although the Changhong TV's overseas business has been transferred overseas, industry groups, but for Changhong color TV, the realization of international and high-end of the transformation is still the need to achieve the transformation, compared with other TV giant Changhong in the vertical chain integration has reached the top.
According to reports, the development of the Changhong TV " intelligent LCD bravely rushed out, PDP maintain the first, CRT follow the market," marketing strategies, and Changhong in display technology, digital interactive technology and digital control technologies are in the industry-leading, with a sound distribution network and upstream of the perfect layout, and past more than 150 million user base advantage of Changhong's considered a great victory this TV back.
It is understood that in a Ren Changhong Group Chairman Zhao Yong, the coordinate of its strategy to develop the industry in three major directions of the extension, Changhong color TV business in Changhong revenue contribution grew from the original 80% to less than 40%, However, Hisense, Skyworth and other competitors from CRT to flat panel to seize the opportunity to upgrade, especially in flat-panel TVs LCD TVs to complete the go-ahead.
Changhong Group Chairman Lin Maoxiang multimedia industry pointed out that "in the upgrade from CRT to flat panel Changhong has lagged behind, which Changhong living in the Mainland, the slow response, but with a new round of industrial upgrading and intelligence era, we are extremely well prepared, and the current gap with rivals in the market has been greatly reduced. "
Situation from 2010, Changhong sold more than 100 million units of plasma TVs, LCD TVs, especially LED LCD TV Changhong up 40%, while CRT TV, including TV with overall shipments rising to the second position.
"Through product differentiation combined market share of the industry return to the first, it is our goal, specifically, the next three years will maintain 20% -25% growth rate." Lin Maoxiang the case said.
It is reported that Changhong will be in 2011 as a strengthening of competition, 2012 to enter the change of competition, 2013 reflect the competitive and comprehensive than the industry leader in 2013 after China's flat panel industry continues to lead the brand, including plasma TVs continue to remain the industry leader .
Specifically, Changhong plasma TV in the ultra-thin, energy-saving technological breakthroughs as well as the perfect combination of 3D display technology, its market position further. According to reports, Changhong June this year all the plasma TV all the 3D technology, as the industry's first proposal to completely eliminate 2D television business, it shows its 3D television remains positive, the Changhong seems plasma is 3D TV the best carrier.
It is worth noting that this year both the Chinese market or the global plasma TV market in 2010 continued the strong growth in China since April this year, of which the plasma TV market simultaneous growth of 69 percent over the same period LCD TV shipment growth of only seven %, many of the original withdrawal of the plasma TV camp color TV manufacturers started to re-launch of plasma products.
Obviously the flat panel TV Changhong out a differentiated way, but in the LCD TV joint venture between Changhong and AUO LCD TFT module plant plans to continue to invest, which will Changhong LCD TVs, especially LCD LED shipment growth to create the conditions.
In Lin Maoxiang view, Changhong color TV to become the leading brand in the world, because the right to re-define consumer electronics companies like Apple to transfer the U.S., China and South Korea's color TV enterprises have gradually returned to the same starting line, especially the domestic LCD panel , plasma screens and chips make up after a short board, Samsung, LG Electronics to build the advantage of relying on the industry chain is gradually lost.
Although the Changhong TV's overseas business has been transferred overseas, industry groups, but for Changhong color TV, the realization of international and high-end of the transformation is still the need to achieve the transformation, compared with other TV giant Changhong in the vertical chain integration has reached the top.
According to reports, the development of the Changhong TV " intelligent LCD bravely rushed out, PDP maintain the first, CRT follow the market," marketing strategies, and Changhong in display technology, digital interactive technology and digital control technologies are in the industry-leading, with a sound distribution network and upstream of the perfect layout, and past more than 150 million user base advantage of Changhong's considered a great victory this TV back.
2011年7月10日星期日
Tolerance of thickness
Tolerance of thickness is about 0.5mm for our display modules. For our 4.3'' LCD module display, the stantard thickness is 8mm. It is normal if the value is between 7.5 and 8.5. However, for dustproof purpose, we changed the design andmake the thickness be 7.35 in theory. So there is 0.65mm difference for the old version and new version.
One customer wrote to us and found a mechanical problem with the shipment of display terminals. The story is like this: we arranged two shipments for the same model seperately. They wrote to us almost 1 month after they received the goods. The TFT incl. touchscreen of the newest shipments have now a thickness of 7.3 to7.8mm, measured on several locations. The thickness of TFT incl. touch was 8.4 ?8.9 mm for the earlier shipments. This means that the surface of the touch is now approximately 1mm deeper than before! Therefore, the mechanical design does not work anymore, the clearance between our front foil and the touch pad is now way too large!
This is a serious problem because users have to press the foil heavily until the display module responds (this happens because there is now 1mm clearance). In order to save time and shipping cost for the goods return from foreign courtiers, the customer is advised to solve the problem this way: paste a transparent foil of adequate thickness (0.5mm as reference value. It depends on the actual condition of your product) on the back of the transparent window of the original foil to make the space between the new foil and the touch screen be 0.2-0.5mm. Then send them to the users. Please ask the users kindly to tear off the original foil and paste the new one. Maybe this is the most economic way to solve the problem.
One customer wrote to us and found a mechanical problem with the shipment of display terminals. The story is like this: we arranged two shipments for the same model seperately. They wrote to us almost 1 month after they received the goods. The TFT incl. touchscreen of the newest shipments have now a thickness of 7.3 to7.8mm, measured on several locations. The thickness of TFT incl. touch was 8.4 ?8.9 mm for the earlier shipments. This means that the surface of the touch is now approximately 1mm deeper than before! Therefore, the mechanical design does not work anymore, the clearance between our front foil and the touch pad is now way too large!
This is a serious problem because users have to press the foil heavily until the display module responds (this happens because there is now 1mm clearance). In order to save time and shipping cost for the goods return from foreign courtiers, the customer is advised to solve the problem this way: paste a transparent foil of adequate thickness (0.5mm as reference value. It depends on the actual condition of your product) on the back of the transparent window of the original foil to make the space between the new foil and the touch screen be 0.2-0.5mm. Then send them to the users. Please ask the users kindly to tear off the original foil and paste the new one. Maybe this is the most economic way to solve the problem.
2011年6月12日星期日
Any Kind of LCM that You Want Can be Found Here
LCD Module has been playing a more and more important part in our daily lives and has made our life more colorful. However, with the development of technology and more demands from customers, many kinds of LCD Modules have come into being, among which are graphic LCM, character LCM.
The graphic LCD TFT Module offered by SYNLINK TECHNOLOGY COMPANY allows users to have a better vision of the images. Once receiving order from the user, the graphic LCM responds quickly and drives the operation of LCD and then required graphics will be displayed on the screen. Take camera for example, with our graphic LCM, users can see their photos more clearly.
Our character LCD Module provides users with more flexibility in displaying characters. Take ammeter and water meter for example, characters can be read more clearly and accurately with our character LCM. What is more, the character LCM offered by our company can work under different environments, ranging from high temperature to low temperature below zero. Also, it can be subject to tough environment like humidity. Therefore, with our character LCM, users can easily check the reading of the water meter and will surely bring a lot of convenience to their daily lives.
The graphic LCD TFT Module offered by SYNLINK TECHNOLOGY COMPANY allows users to have a better vision of the images. Once receiving order from the user, the graphic LCM responds quickly and drives the operation of LCD and then required graphics will be displayed on the screen. Take camera for example, with our graphic LCM, users can see their photos more clearly.
Our character LCD Module provides users with more flexibility in displaying characters. Take ammeter and water meter for example, characters can be read more clearly and accurately with our character LCM. What is more, the character LCM offered by our company can work under different environments, ranging from high temperature to low temperature below zero. Also, it can be subject to tough environment like humidity. Therefore, with our character LCM, users can easily check the reading of the water meter and will surely bring a lot of convenience to their daily lives.
2011年6月9日星期四
UART display module
The RS232 LCD module is a kind of serial display module that based on EIA-RS-232 standard. This standard is widely used in serial communication, like PC peripheral equipments, such as teletype and modem. LCD module that works in UART pattern is also called UART LCD module. That is to say, every serial LCD module and TFT LCM with RS232 compatible is a UART LCD. Its instinct advantage lies in no synchronization signal transferring by another line, which is suitable for kinds of application and systems that require low power consumption and Simplified circuits.
However, the synchronization signal is added before and after data transmitting. This may cause a slice delay of response potentially. LCD module manufacturers have developed several reliable technologies to assure its real-time performance. A mainstream technology is based on utilizing the built-in MCU, by using a simple but powerful command-set. As a classic solution of time-space and time-processing swap, this lead to the balance of developing time and cost. Some Graphic lcd module companies in China have already advanced an approach to settle this down. By introducing intelligence into UART TFT Display Module, developers can finish their design within a predictable time period, by figuring out specified program to send the fixed commands to LCD display module.
However, the synchronization signal is added before and after data transmitting. This may cause a slice delay of response potentially. LCD module manufacturers have developed several reliable technologies to assure its real-time performance. A mainstream technology is based on utilizing the built-in MCU, by using a simple but powerful command-set. As a classic solution of time-space and time-processing swap, this lead to the balance of developing time and cost. Some Graphic lcd module companies in China have already advanced an approach to settle this down. By introducing intelligence into UART TFT Display Module, developers can finish their design within a predictable time period, by figuring out specified program to send the fixed commands to LCD display module.
2011年6月7日星期二
Monochrome data transfer
Data transfer function is pretty necessary for TFT LCD module. Recently, one of our customers asked for a new feature: monochrome data transfer. In his application, monochrome image data needs to be transferred from LCD display of the aquarium computer to TFT LCD module for remote control. He prints 244 pixels in each line, for 64 lines. Old command for data transfer is ok for this requirement, but it is very slow because the user has to transfer for each line more than 500 Bytes, which takes 40ms at 115200 baud rate. Each printed point needs 2 bytes for the color, but actually there are only 2 colors: background and foreground. So it is very beneficial to have a command which allows the transfer of monochrome picture data (patterns). To solve the problem, the feature is developed.
There are some important points to consider when creating the new command for transferring monochrome data. It should be possible that the count of transferred pixels is not always a multiple of 8 (8, 16, 24 ?, e.g. if the user prints 122 and 244 pixels, it is not enough to count the transferred bytes of monochrome data (bit masks).
There shall be 2 solutions for this:
a) the amount of pixels to be printed have to be transmitted also after coordinates
b) create 2 different commands: one command prints the set bits with foreground color, the other with background color, the clear bits do not have any affect (transparent)
When the user wants a specific color under the line of monochrome data, the user can use the line-command before sending the monochrome data to TFT LCD module.
There are some important points to consider when creating the new command for transferring monochrome data. It should be possible that the count of transferred pixels is not always a multiple of 8 (8, 16, 24 ?, e.g. if the user prints 122 and 244 pixels, it is not enough to count the transferred bytes of monochrome data (bit masks).
There shall be 2 solutions for this:
a) the amount of pixels to be printed have to be transmitted also after coordinates
b) create 2 different commands: one command prints the set bits with foreground color, the other with background color, the clear bits do not have any affect (transparent)
When the user wants a specific color under the line of monochrome data, the user can use the line-command before sending the monochrome data to TFT LCD module.
Re-synchronization is not possible
For our Synchronization solution, some customers are worried that the reaction time of the LCD module will be longer than that under normal conditions in case of re-synchronization since they holds the CPU's sending commands to LCD module can not rely on the fast reaction time of the display (approx. 2 msec per command).
In fact, this situation doesn't exist at all because processing speed of CPU is much faster, compared with communication speed. The other customers think for a save communication path between CPU and LCD module there should be some interaction to let the CPU know what has happened, otherwise the CPU will not know how many frames were lost. Because of the automatic re-synchronization, which takes place within the display, the information of the pointer status will be overwritten. They ask for interaction between CPU and LCD module which can't be realized by automatic re-synchronization.
This problem does exist. The solution is by "checking-response" way. But if this method is applied, the protocol will be very complicated and troublesome. For example, if some response is lost, the command needs to be re-sent. Furthermore, the command re-sent shall be numbered one by one. In this way, it is not meaningful to use our display module, since the biggest feature of our product is its easy operation.
In fact, this situation doesn't exist at all because processing speed of CPU is much faster, compared with communication speed. The other customers think for a save communication path between CPU and LCD module there should be some interaction to let the CPU know what has happened, otherwise the CPU will not know how many frames were lost. Because of the automatic re-synchronization, which takes place within the display, the information of the pointer status will be overwritten. They ask for interaction between CPU and LCD module which can't be realized by automatic re-synchronization.
This problem does exist. The solution is by "checking-response" way. But if this method is applied, the protocol will be very complicated and troublesome. For example, if some response is lost, the command needs to be re-sent. Furthermore, the command re-sent shall be numbered one by one. In this way, it is not meaningful to use our display module, since the biggest feature of our product is its easy operation.
Samsung launch the world's best performance 32GB DDR3 Memory Modules
The original 40-nm 32GB DDR3 memory in 2011 by the U.S. CES International Consumer Electronics Show Innovation Award selection of environmentally friendly products, this contrast seems the server 30 nano 32GB DDR3 modules can be described as the world's most superior products, which Samsung implements the server marks the first special, super energy-efficient 30-nanometer 32GB DDR3 memory module production. Samsung's 4Gb DRAM current production process from the server to the notebook cover a range of products, industry sources said that these new products or will lead from the high-performance, high-capacity server to the rapid development of the mobile market.
In addition, using a 30 nanometer 2Gb DDR3 DRAM display module production compared to 30 nano-4Gb DDR3 DRAM modules for performance notebooks are still prominent, the former has the same 1.5 V / 2.133Mbps high performance. The 30 nano 4Gb DDR3 DRAM production capacity of more than 40 units of nano 4Gb DDR3 DRAM higher than 50%, it will have high-performance, low power and high-end server market the next generation of notebooks to replace 40 of Nano 4Gb DDR3 DRA At the same time, creating new demand.
In fact, since February 2011, the Samsung has volume 30 nanometer (1 nanometer is equivalent to 10 billionths of a meter) 4Gb DDR3 DRAM, and in April began to supply 16GB modules, followed by the beginning of this month 32GB DDR3 module, and provides high-end notebook with a 30-nanometer 8GB DDR3 modules, built into high-performance, high-capacity "green DDR3 product line."
Some analysts believe that starting from March 2011, Samsung took only one month to move to achieve a 4Gb DRAM to 4Gb DRAM mass production of large-capacity computer technology tft module production, indicating that the mobile market to the enterprise from server market, Samsung will be the most advanced 30-nanometer DRAM to promote business-to-low-power "green memory" needs.
Currently, Samsung in order to further carry out the "green storage" promotion, with major server manufacturers and computer companies to strengthen technical exchanges and cooperation. Meanwhile, this year's "Semiconductor CIO Forum", Samsung will work with the United States and chief information officer of multinational companies in Asia to share the green business (re-creation of value through the green memory) the fruits, at the same time, by creating more broad opportunities for cooperation to complete the "Green IT system."
Samsung Electronics Semiconductor Business Unit, Head of Strategic Marketing for Storage End Hsun Hung Vice Chairman of the reporters said, "Samsung's first production in February last year, Nano 4Gb DDR3 DRAM 40 after just one year's time to successful implementation of 30 nm Class 4Gb DDR3 DRAM mass production. can say that we in the enterprise server market and other high-end mobile market DRAM market to ensure the highest level of competitiveness of products and solutions. In order to adapt to the rapid development of green IT market, we plan the next half '20 launch ultra power-saving-type nano 4Gb DRAM '. After that, we also continue to adhere to the highest performance to customers' green memory solutions', and sustainable development of the memory market. "
Reporter learned from Samsung Electronics, Samsung Electronics to The 30-nanometer production as an opportunity to 4Gb DRAM, will greatly increase the proportion of large-capacity DRAM production, for the latest in 2012, this proportion will increase to 10 for all DRAM production % or more. According to market research survey, 4Gb DRAM market share gradually expanded from 2011 to 2012, 2013, 2014, will expand to 10%, 35%, 57%, has become the main force in DRAM market .
In addition, using a 30 nanometer 2Gb DDR3 DRAM display module production compared to 30 nano-4Gb DDR3 DRAM modules for performance notebooks are still prominent, the former has the same 1.5 V / 2.133Mbps high performance. The 30 nano 4Gb DDR3 DRAM production capacity of more than 40 units of nano 4Gb DDR3 DRAM higher than 50%, it will have high-performance, low power and high-end server market the next generation of notebooks to replace 40 of Nano 4Gb DDR3 DRA At the same time, creating new demand.
In fact, since February 2011, the Samsung has volume 30 nanometer (1 nanometer is equivalent to 10 billionths of a meter) 4Gb DDR3 DRAM, and in April began to supply 16GB modules, followed by the beginning of this month 32GB DDR3 module, and provides high-end notebook with a 30-nanometer 8GB DDR3 modules, built into high-performance, high-capacity "green DDR3 product line."
Some analysts believe that starting from March 2011, Samsung took only one month to move to achieve a 4Gb DRAM to 4Gb DRAM mass production of large-capacity computer technology tft module production, indicating that the mobile market to the enterprise from server market, Samsung will be the most advanced 30-nanometer DRAM to promote business-to-low-power "green memory" needs.
Currently, Samsung in order to further carry out the "green storage" promotion, with major server manufacturers and computer companies to strengthen technical exchanges and cooperation. Meanwhile, this year's "Semiconductor CIO Forum", Samsung will work with the United States and chief information officer of multinational companies in Asia to share the green business (re-creation of value through the green memory) the fruits, at the same time, by creating more broad opportunities for cooperation to complete the "Green IT system."
Samsung Electronics Semiconductor Business Unit, Head of Strategic Marketing for Storage End Hsun Hung Vice Chairman of the reporters said, "Samsung's first production in February last year, Nano 4Gb DDR3 DRAM 40 after just one year's time to successful implementation of 30 nm Class 4Gb DDR3 DRAM mass production. can say that we in the enterprise server market and other high-end mobile market DRAM market to ensure the highest level of competitiveness of products and solutions. In order to adapt to the rapid development of green IT market, we plan the next half '20 launch ultra power-saving-type nano 4Gb DRAM '. After that, we also continue to adhere to the highest performance to customers' green memory solutions', and sustainable development of the memory market. "
Reporter learned from Samsung Electronics, Samsung Electronics to The 30-nanometer production as an opportunity to 4Gb DRAM, will greatly increase the proportion of large-capacity DRAM production, for the latest in 2012, this proportion will increase to 10 for all DRAM production % or more. According to market research survey, 4Gb DRAM market share gradually expanded from 2011 to 2012, 2013, 2014, will expand to 10%, 35%, 57%, has become the main force in DRAM market .
2011年6月2日星期四
Serial LCD module as solution for cash terminal
Our serial LCD module is suitable for different applications of various industries. For example, a customer likes to build a display into a cash terminal. He has a save interaction between the outside world and the CPU (SSL or something similar). But communication between CPU and the display must be saved. All communication bytes are well specified in the command documentation and the documentation is freely available in the internet. However, this communication path is open; it is not safe at all.
Now, the bank house wants us to ensure that there is no way to manipulate the electronic parts within the cash terminal. Currently, it seems impossible because it is easy to decode the communication transfer on the RS232 interface since all codes can be obtained from the internet. By knowing the bytes transferred, it is possible to manipulate the output of the display without attacking the (save) CPU.
The solution is to add a password byte (or word) to the data transfer code, which is sent to the display. We called this procedure "user password". The password byte would be used by the serial LCD module to decode the incoming transfer bytes. So, even using a data logger, one cannot find out what type of transfer is going on between the CPU and the Serial lcd module, because one can not see any "clear text". Thus, attacking the RS232 interface is almost impossible and security communication can be guaranteed.
Now, the bank house wants us to ensure that there is no way to manipulate the electronic parts within the cash terminal. Currently, it seems impossible because it is easy to decode the communication transfer on the RS232 interface since all codes can be obtained from the internet. By knowing the bytes transferred, it is possible to manipulate the output of the display without attacking the (save) CPU.
The solution is to add a password byte (or word) to the data transfer code, which is sent to the display. We called this procedure "user password". The password byte would be used by the serial LCD module to decode the incoming transfer bytes. So, even using a data logger, one cannot find out what type of transfer is going on between the CPU and the Serial lcd module, because one can not see any "clear text". Thus, attacking the RS232 interface is almost impossible and security communication can be guaranteed.
2011年6月1日星期三
Password-protection feature
Password-protection feature of intelligent UART LCD module sometimes plays a very important role in some fields, such as bank system. The typical application is ATM.
It is necessary to protect the display itself against misuse, so it is recommended that the UART LCD module has a user-password, which has to be sent to the serial display terminal after power-on. Without the user-password the display will not show any picture. Besides, it is recommended that the UART LCD module has a supervisor-password. Without the supervisor-password the display will not readout the pictures stored in its memory, so this supervisor-password acts like a read-protection for the display-memory. Lastly, it is recommended that the UART LCD module has a diag-password. Without the diag-password the display will not change its picture memory, therefore this diagnostic password will act like a write-protection for the display-memory. The feature aims to provide service and displays to medical and instrumentation companies as well as to bank houses.
It is absolutely necessary to protect the UART LCD module and its memory from any manipulation or misuse. If there is no password-feature implemented, then there is almost no chance for the UART LCD module to go into the said fields. If customers have such requirements, we are in the position to revise our software and add password feature accordingly.
It is necessary to protect the display itself against misuse, so it is recommended that the UART LCD module has a user-password, which has to be sent to the serial display terminal after power-on. Without the user-password the display will not show any picture. Besides, it is recommended that the UART LCD module has a supervisor-password. Without the supervisor-password the display will not readout the pictures stored in its memory, so this supervisor-password acts like a read-protection for the display-memory. Lastly, it is recommended that the UART LCD module has a diag-password. Without the diag-password the display will not change its picture memory, therefore this diagnostic password will act like a write-protection for the display-memory. The feature aims to provide service and displays to medical and instrumentation companies as well as to bank houses.
It is absolutely necessary to protect the UART LCD module and its memory from any manipulation or misuse. If there is no password-feature implemented, then there is almost no chance for the UART LCD module to go into the said fields. If customers have such requirements, we are in the position to revise our software and add password feature accordingly.
2011年5月31日星期二
Intelligent LCD module, a perfect HMI solution
Synlink Technology Co,Ltd. was established to mainly explore European market, a greatly potential market. There are huge demands for Intelligent LCD module in Europe. Synlink participated in "embedded world" trade fair at Nuremberg held from Mar.3, 2010 to Mar.5, 2010. During the trade fair, hundreds of customers showed much interest in our product, not only for the competitive price, but also for the powerful performance. Besides to explore market, we also provide some HMI solution to customers, if requested. That is to say, we can provide complete design plan for HMI as we have some experienced technical persons for this service.
Compared with the competitors, our Intelligent LCD modules sells much better due to the following reasons:
1. Leading technology. This is related to our know-how.
A. Unique drive module. It is a patent product. Because of this, any engineer can finish HMI design with little time as he does not have to study how to drive the TFT and control TFT. The only thing that the engineers need to do is just control our module. So, it will help our customers to shorten development time and lower development cost. Until now, four generations are available.
B. Touch panel technology, which leads to longer life span of the screen, at least three years longer. That is from the accurate algorithm, low power/voltage and self-designed MCU.
C. Accurate algorithm about some data, which results in its excellent reliability. It also obtained patent.
2. Perfect QA plan which is loyally carried out by production and quality control sectors.
3. Price. It has something to do with our scale.
4. Management. Good management is up to an outstanding leader and his leading strategy. Mr.Wang, as the top leader of this company, always makes everyone feel like being at home, which arouse our unbeatable enthusiasm for working with powerful executive ability.
Due to the above-mentioned advantages, we are developing at an amazing speed from nothing. Currently, our Intelligent LCD module occupies 70% of similar product in China and the rate will be higher for sure in the future.
Compared with the competitors, our Intelligent LCD modules sells much better due to the following reasons:
1. Leading technology. This is related to our know-how.
A. Unique drive module. It is a patent product. Because of this, any engineer can finish HMI design with little time as he does not have to study how to drive the TFT and control TFT. The only thing that the engineers need to do is just control our module. So, it will help our customers to shorten development time and lower development cost. Until now, four generations are available.
B. Touch panel technology, which leads to longer life span of the screen, at least three years longer. That is from the accurate algorithm, low power/voltage and self-designed MCU.
C. Accurate algorithm about some data, which results in its excellent reliability. It also obtained patent.
2. Perfect QA plan which is loyally carried out by production and quality control sectors.
3. Price. It has something to do with our scale.
4. Management. Good management is up to an outstanding leader and his leading strategy. Mr.Wang, as the top leader of this company, always makes everyone feel like being at home, which arouse our unbeatable enthusiasm for working with powerful executive ability.
Due to the above-mentioned advantages, we are developing at an amazing speed from nothing. Currently, our Intelligent LCD module occupies 70% of similar product in China and the rate will be higher for sure in the future.
Technical features of graphic lcd module
Since our graphic serial LCD becomes more and more popular in USA, a powerful distributor seems very urgent. Undoubtedly, having a basic understanding about our graphic serial LCD is the precondition. The outstanding technical characteristics of the graphic serial LCD are as follows:
1 Reading-protection
FEC coding and interleave processing are done on the pictures by our software before they
are stored, so the pictures finally stored in our flash are greatly different from the original ones.
That is to say, it is impossible for the others to decode the data. It is good for protecting
customers?intellectual property. Furthermore, one of Germany customers whose product is for
banks, requested us to add a "User password" in the graphic serial LCD because the
customer is worried that the communication between the CPU and graphic Serial LCD will be
attacked by the third party. In this way, some confidential information will be revealed.
2 Low power consumption
After our calculation, more than 70% power will be saved, compared with other industrial
control PCB.
3 All of our graphic serial LCD share the same commands.
When there is software upgrade, our display will show strong compatibility. Besides, the
commands are very easy and practicable.
4 Reliable.
Terminal Assistant, software developed by Dwin technical staff, completely free from bug is
the guarantee for the performance.
5 Stable.
Our graphic serial LCD is with strong anti-jamming ability when the working temperature:
-20-70 degree centigrade.
6 Extremely low back repair rate.
The back repair rate is lower than 0.5%. There is only one person in charge of back repair. It
means something. Take Sany group as an example. It is reported that the back repair rate of
our products are lower than 1%, including physical damages, while the percentage is 7.8% for
similar products.
7 Big memory space.
In general, our flash is about 128 megabyte.
1 Reading-protection
FEC coding and interleave processing are done on the pictures by our software before they
are stored, so the pictures finally stored in our flash are greatly different from the original ones.
That is to say, it is impossible for the others to decode the data. It is good for protecting
customers?intellectual property. Furthermore, one of Germany customers whose product is for
banks, requested us to add a "User password" in the graphic serial LCD because the
customer is worried that the communication between the CPU and graphic Serial LCD will be
attacked by the third party. In this way, some confidential information will be revealed.
2 Low power consumption
After our calculation, more than 70% power will be saved, compared with other industrial
control PCB.
3 All of our graphic serial LCD share the same commands.
When there is software upgrade, our display will show strong compatibility. Besides, the
commands are very easy and practicable.
4 Reliable.
Terminal Assistant, software developed by Dwin technical staff, completely free from bug is
the guarantee for the performance.
5 Stable.
Our graphic serial LCD is with strong anti-jamming ability when the working temperature:
-20-70 degree centigrade.
6 Extremely low back repair rate.
The back repair rate is lower than 0.5%. There is only one person in charge of back repair. It
means something. Take Sany group as an example. It is reported that the back repair rate of
our products are lower than 1%, including physical damages, while the percentage is 7.8% for
similar products.
7 Big memory space.
In general, our flash is about 128 megabyte.
2011年5月30日星期一
Touch-screen display module in the quality of Newton's ring defects and corrective and preventive measures
In the resistive touch screen and liquid crystal display production process, the Newton ring (some manufacturers also called rainbow pattern, or simply called the Rainbow) drifting like a ghost in the workshop, accidentally, from time to time it with the customer in the production occur during use, made to do a lot of site management in the workshop process and technical personnel captivated. Not because it is too beautiful rainbow, but the quality of this beautiful killer, in the current industry, too easy to trouble, let someone else a fine Yan finds fault.
In the display module, the Newton ring region appears as the underlying reason why the interference of light, color overlay which will cause color errors leading to the final show, on the other hand, also reduced the display contrast of the region, it is mainly as a fatal defects in the column set.
First, the mechanism of Newton's rings
We know, whether it is resistive touch screen, or liquid crystal displays, are two of the main support piece of ITO glass or ITO glass, a piece of ITO FILM, if there are side material generated deformation, the inner surface of ITO materials to produce a radius of curvature of the surface, with the usual physical optics in the generation of about Newton ring convex lens surface and the plane mirrors effect is the same, Newton ring is also reflected in the relatively light because of the two surfaces reflect light and incident light wavelength of optical path difference and the relationship between. It is the same, because the optical path difference will increase, that is, the distance between the surfaces increases the distance between Newton's rings will increase.
In the actual production process, regardless of Ye Hao resistive touch screen, LCD Ye Hao, will support the frame at the distance farther than the middle of the gap slightly larger, slightly worse if the process parameters from, then the distance difference would not be able to eliminate, so let the two surfaces have a certain inward sag in the middle, so that the light in the two optical path difference between the surface will produce not the same as in the incident light and reflected light interfere with each other process, to will be according to different optical path difference selected different wavelength region out, revealing the color of the corresponding wavelength.
Second, the actual production of local produce Newton rings and why
In the liquid crystal display module, there are three areas most prone to Newton's rings:
1, the liquid crystal display internally generated rainbow.
LCD module cell thickness of 10 microns are generally, if the number of particles is not enough space inside, or uneven, or the space frame and the particle diameter of the internal support is not suitable for workshops with the design process, will have a rainbow defects. Another major cause of that process into the box, the box is more than the diameter of space particles contaminated by foreign objects, which is the liquid crystal display plant for clean environment is very strict control of reason.
2, the liquid crystal display with resistive touch screen between the ripples (also known as Watermark)
The water ripples, the same is in one of Newton's rings, especially the resistive touch screen action, the added resistance to outside pressure on the touch screen resistive touch screen caused by bending under the surface, it will change with the intensity of Newton rings will move the color radius, generate or disappear, just like stones dropped into the water, like ripples of water produced, so this is also called Newton's rings ripple or watermarks, will be shown with the location and movement action and change the pressure .
3, the resistive touch screen inside the Newton rings (also called rainbow pattern)
Resistive Touch Screen in the production process, in order to produce a touch deformation region, the height of the general outline of the support points are much higher than inside, water-based glue to do if the printed words of frame, generally 50 to 70 microns in height so; If you are using double-sided adhesive PET substrate, the general is also more than 50 microns, while the inside of the support points, generally less than 25 microns, using 30 to 45 microns in diameter, DOT, the forming height of the last strong point, only 15 ~ 25 microns.
With resistive touch screen operation surface, the same region in order to produce a deformation of touch, usually ITO FILM, the material is flexible. Thus, if the production control process parameters inaccurate, do not move operation, in the product by the middle part of the ITO FILM, will collapse of its own, attached to the anchor, the produce surface deformation, so that light rays with the inner surface of the two ITO negative light to produce interference, they formed a Newton ring.
Third, how to measure to prevent Newton rings produced by the design parameters
In actual production, how to effectively prevent the generation of Newton's rings, the same optical ring according to Newton's law of prevention.
In the beginning we began to design products that can be based on product dimensions, calculate the height of the inner and outer box, how much value is, the Newton ring inner radius of the dark ring, would fall outside the product size, so you can optimize the parameters of their own design . (How to calculate and principles of the formula may refer to Annex "equal thickness interference experiment").
Of course, the above validation of this approach is a theoretical fact, if calculated in accordance with the real data, we can not make the customer demand for products, but this calculation, you can guide us in the production, how best to close to the theoretical values .
Some would say that it does not accurately calculated, the production can not be avoided, there is no better way yet? Have, or refer to the attached "equal thickness interference experiment" approach, with a microscope or a micrometer to measure the deformation of your shift down on the number of films, the Newton ring appeared, and then calculate your Newton rings appear in the middle of the smallest particles or the thickness of the supporting space, if together with the pressure gauge with, but also to measure the product of Newton rings occur when the pressure is. Therefore, problems, start testing methods demonstrated, from the experimental data to validate, from process parameters on the adjustment.
Fourth, how to prevent Newton rings from craft production
1, the liquid crystal display of the rainbow
Rainbow defects can quickly find the source of a microscope, if it is point-like, you can see under the microscope in three ways: a small number of particles in space, space particles agglomerate together, foreign body inside the box. Such defects, according to observations on, you can adjust the front right from the parameter space particle spreader, spreading segment and the combination of space particles and clean maintenance section both for prevention.
If the liquid crystal display are a rainbow, it is either within the space frame and the particle with the wrong box, or the number of particles is not enough space inside the box or not. Such defects, may check the spreading of the technology space particles in front of the material parameters, particle detection data, adjust the parameters for prevention.
If the frame is a box near the rainbow, or a frame packaging material contaminated by foreign bodies can be seen from the microscope, either into the box caused all Shouli Bu, need to check into the box equipment and maintenance. Into a box equipment failure, or in case of a foreign body caused by the process of the rainbow folder will also in the adjacent produce the same place a few slices of Newton ring product, that there will be regular.
2, the resistive touch screen and LCD ripples between
To prevent water wave generation, firstly, to increase the intensity of resistive touch screen, for example, the original PC substrate is replaced by a greater pressure force afterburner or glass material, or from thin substrate, and replaced thick substrate. This is why more than a certain size resistive touch screen products will use 2MM glass thickness of glass or one of the reasons. All design parameters are justified, and not copying from the outside will be able to blind copy, if the unknown principle of blind copy, or a waste of materials and quality of your costs, or can not avoid their potential yield and product quality defects rate.
Second is to meet customer requirements in the case of resistive touch screen and liquid crystal display assembly of double-sided adhesive used between the thicker the thickness of the ring to move the Newton ring product size dark outside. Or resistive touch screen and LCD monitors are also printed on the assembly side support and the transfer of the external pressure to the liquid crystal display through the anchor and the housing board to reduce the resistive touch screen of the deformation, to prevent Newton rings, which is a wavy generated.
If the display of products to meet the demand, in terms acceptable to display, can also resistive touch screen surface combined with the liquid crystal display on the LCD monitor glare polarizer into the polarizer. Note that the close-glare polarizer polarizer display display than the average lot worse, especially over QVGA LCD display, if replaced, the display of detail design, response speed and contrast, are significantly decreased, so the end customer must determine the display before replacement.
3, the resistive touch screen of the Newton ring
Resistive touch screen it does to Newton ring prevention of trouble, because most of the operation of resistive touch screen surface, using a flexible ITO FILM substrate.
Resistive touch screen to prevent Newton rings, first in the ITO FILM quenching process, the choice of a good governance for their own tooling and equipment for modified treatment parameters, so that all parts of ITO FILM synchronous contraction, no contraction due to uneven produced uneven, or on the loading fixture is not transferred to the ITO FILM on the flat. The quenching by ITO FILM generated do not ring, has a very distinctive features, if it is combined and then fractionated products, after a good portfolio can not see the ring, but in the product 48 hours after the sub-grain left will appear.
Support points of the high degree of control is the main way to prevent Newton's rings by the above calculation, we can see that, to survive on the height above a certain value, it will be difficult to form the, or are widely spaced to be diluted So we must guarantee the anchor height.
Height of the supporting affirmation and support points attached to the area have a certain relationship, in the same conditions, the higher the altitude, the greater the support points attached to the area, for some fine-quality liquid crystal displays, the pixel size may be only 60 to 90 microns, the size if a strong point after more than half the size of pixels, then the pixel will have a display distortion, observed at a distance, can the layout of the support points emerge from the display screen. To solve this problem, the Japanese manufacturers in the narrow design of the small size products, the use of molds or add gasket combination, which allows the product filled the air, man-made increased the distance between the inner surface of products that avoid the appearance of Newton's rings , would not have to frame design is very complex and difficult to produce a ventilation channel, but also can design the anchor attached to a small area.
Defects in the way inflation is not used in the temperature environment of rapid change, or large-size products. In particular, water-based adhesive printed products, as design is narrow, and difficult to operate, resulting in lack of bond strength. After the drastic changes in temperature, it is likely to cause leakage, gas leakage, the effect is gone to avoid Newton's rings. Many manufacturers of products in the factory warehouse on their own thermostat there is no problem, get the customer's normal storage place for a week, or simply just after a motor transport, the product of Newton's ring phenomenon occurs, that is the reason. So inflation is not to deal with Newton's rings the traditional remedy of a fresh recruit, use of the product if you do not consider the conditions and environment, together with other auxiliary craft with it, would not achieve a real effect.
Resistive touch screen sensitive areas of the ring, the same material thickness is a combination of various techniques and hot temperature and pressure parameters of inappropriate FPC generated, basically you can adjust the thickness of FPC materials and hot pressing parameters can be resolved.
For those watching from the distant large-size display products, because the pixel size is relatively large, can use 50 to 60 micron size of the support points, support points unless it is printed or anchor a high degree of uneven subsidence, generally does not appear Newton ring phenomenon.
V. Conclusion
Newton's rings, nothing more than parallel to the incident light and reflected light generated by mutual interference, such interference is only within a certain optical path difference will be revealed. To avoid the generation of Newton's rings, one approach is to disrupt the direction of light propagation, such as in resistive touch screen, use matte ITO FILM; in LCM polarizing films such as the use of glare; Another way is to ensure that the parallel surfaces, so that the radius of curvature within the table is large enough so that the dark Newton ring expansion to the product outside the loop region; there is greater difference between the two surfaces of the optical path, so that Newton's ring area falls on the dark ring Size Newton ring outside or to increase the distance between adjacent rings, dilute Newton rings. As long as the generation mechanism based on Newton's rings, in the production process to control the quality of Newton's rings is not a ghost.
In the display module, the Newton ring region appears as the underlying reason why the interference of light, color overlay which will cause color errors leading to the final show, on the other hand, also reduced the display contrast of the region, it is mainly as a fatal defects in the column set.
First, the mechanism of Newton's rings
We know, whether it is resistive touch screen, or liquid crystal displays, are two of the main support piece of ITO glass or ITO glass, a piece of ITO FILM, if there are side material generated deformation, the inner surface of ITO materials to produce a radius of curvature of the surface, with the usual physical optics in the generation of about Newton ring convex lens surface and the plane mirrors effect is the same, Newton ring is also reflected in the relatively light because of the two surfaces reflect light and incident light wavelength of optical path difference and the relationship between. It is the same, because the optical path difference will increase, that is, the distance between the surfaces increases the distance between Newton's rings will increase.
In the actual production process, regardless of Ye Hao resistive touch screen, LCD Ye Hao, will support the frame at the distance farther than the middle of the gap slightly larger, slightly worse if the process parameters from, then the distance difference would not be able to eliminate, so let the two surfaces have a certain inward sag in the middle, so that the light in the two optical path difference between the surface will produce not the same as in the incident light and reflected light interfere with each other process, to will be according to different optical path difference selected different wavelength region out, revealing the color of the corresponding wavelength.
Second, the actual production of local produce Newton rings and why
In the liquid crystal display module, there are three areas most prone to Newton's rings:
1, the liquid crystal display internally generated rainbow.
LCD module cell thickness of 10 microns are generally, if the number of particles is not enough space inside, or uneven, or the space frame and the particle diameter of the internal support is not suitable for workshops with the design process, will have a rainbow defects. Another major cause of that process into the box, the box is more than the diameter of space particles contaminated by foreign objects, which is the liquid crystal display plant for clean environment is very strict control of reason.
2, the liquid crystal display with resistive touch screen between the ripples (also known as Watermark)
The water ripples, the same is in one of Newton's rings, especially the resistive touch screen action, the added resistance to outside pressure on the touch screen resistive touch screen caused by bending under the surface, it will change with the intensity of Newton rings will move the color radius, generate or disappear, just like stones dropped into the water, like ripples of water produced, so this is also called Newton's rings ripple or watermarks, will be shown with the location and movement action and change the pressure .
3, the resistive touch screen inside the Newton rings (also called rainbow pattern)
Resistive Touch Screen in the production process, in order to produce a touch deformation region, the height of the general outline of the support points are much higher than inside, water-based glue to do if the printed words of frame, generally 50 to 70 microns in height so; If you are using double-sided adhesive PET substrate, the general is also more than 50 microns, while the inside of the support points, generally less than 25 microns, using 30 to 45 microns in diameter, DOT, the forming height of the last strong point, only 15 ~ 25 microns.
With resistive touch screen operation surface, the same region in order to produce a deformation of touch, usually ITO FILM, the material is flexible. Thus, if the production control process parameters inaccurate, do not move operation, in the product by the middle part of the ITO FILM, will collapse of its own, attached to the anchor, the produce surface deformation, so that light rays with the inner surface of the two ITO negative light to produce interference, they formed a Newton ring.
Third, how to measure to prevent Newton rings produced by the design parameters
In actual production, how to effectively prevent the generation of Newton's rings, the same optical ring according to Newton's law of prevention.
In the beginning we began to design products that can be based on product dimensions, calculate the height of the inner and outer box, how much value is, the Newton ring inner radius of the dark ring, would fall outside the product size, so you can optimize the parameters of their own design . (How to calculate and principles of the formula may refer to Annex "equal thickness interference experiment").
Of course, the above validation of this approach is a theoretical fact, if calculated in accordance with the real data, we can not make the customer demand for products, but this calculation, you can guide us in the production, how best to close to the theoretical values .
Some would say that it does not accurately calculated, the production can not be avoided, there is no better way yet? Have, or refer to the attached "equal thickness interference experiment" approach, with a microscope or a micrometer to measure the deformation of your shift down on the number of films, the Newton ring appeared, and then calculate your Newton rings appear in the middle of the smallest particles or the thickness of the supporting space, if together with the pressure gauge with, but also to measure the product of Newton rings occur when the pressure is. Therefore, problems, start testing methods demonstrated, from the experimental data to validate, from process parameters on the adjustment.
Fourth, how to prevent Newton rings from craft production
1, the liquid crystal display of the rainbow
Rainbow defects can quickly find the source of a microscope, if it is point-like, you can see under the microscope in three ways: a small number of particles in space, space particles agglomerate together, foreign body inside the box. Such defects, according to observations on, you can adjust the front right from the parameter space particle spreader, spreading segment and the combination of space particles and clean maintenance section both for prevention.
If the liquid crystal display are a rainbow, it is either within the space frame and the particle with the wrong box, or the number of particles is not enough space inside the box or not. Such defects, may check the spreading of the technology space particles in front of the material parameters, particle detection data, adjust the parameters for prevention.
If the frame is a box near the rainbow, or a frame packaging material contaminated by foreign bodies can be seen from the microscope, either into the box caused all Shouli Bu, need to check into the box equipment and maintenance. Into a box equipment failure, or in case of a foreign body caused by the process of the rainbow folder will also in the adjacent produce the same place a few slices of Newton ring product, that there will be regular.
2, the resistive touch screen and LCD ripples between
To prevent water wave generation, firstly, to increase the intensity of resistive touch screen, for example, the original PC substrate is replaced by a greater pressure force afterburner or glass material, or from thin substrate, and replaced thick substrate. This is why more than a certain size resistive touch screen products will use 2MM glass thickness of glass or one of the reasons. All design parameters are justified, and not copying from the outside will be able to blind copy, if the unknown principle of blind copy, or a waste of materials and quality of your costs, or can not avoid their potential yield and product quality defects rate.
Second is to meet customer requirements in the case of resistive touch screen and liquid crystal display assembly of double-sided adhesive used between the thicker the thickness of the ring to move the Newton ring product size dark outside. Or resistive touch screen and LCD monitors are also printed on the assembly side support and the transfer of the external pressure to the liquid crystal display through the anchor and the housing board to reduce the resistive touch screen of the deformation, to prevent Newton rings, which is a wavy generated.
If the display of products to meet the demand, in terms acceptable to display, can also resistive touch screen surface combined with the liquid crystal display on the LCD monitor glare polarizer into the polarizer. Note that the close-glare polarizer polarizer display display than the average lot worse, especially over QVGA LCD display, if replaced, the display of detail design, response speed and contrast, are significantly decreased, so the end customer must determine the display before replacement.
3, the resistive touch screen of the Newton ring
Resistive touch screen it does to Newton ring prevention of trouble, because most of the operation of resistive touch screen surface, using a flexible ITO FILM substrate.
Resistive touch screen to prevent Newton rings, first in the ITO FILM quenching process, the choice of a good governance for their own tooling and equipment for modified treatment parameters, so that all parts of ITO FILM synchronous contraction, no contraction due to uneven produced uneven, or on the loading fixture is not transferred to the ITO FILM on the flat. The quenching by ITO FILM generated do not ring, has a very distinctive features, if it is combined and then fractionated products, after a good portfolio can not see the ring, but in the product 48 hours after the sub-grain left will appear.
Support points of the high degree of control is the main way to prevent Newton's rings by the above calculation, we can see that, to survive on the height above a certain value, it will be difficult to form the, or are widely spaced to be diluted So we must guarantee the anchor height.
Height of the supporting affirmation and support points attached to the area have a certain relationship, in the same conditions, the higher the altitude, the greater the support points attached to the area, for some fine-quality liquid crystal displays, the pixel size may be only 60 to 90 microns, the size if a strong point after more than half the size of pixels, then the pixel will have a display distortion, observed at a distance, can the layout of the support points emerge from the display screen. To solve this problem, the Japanese manufacturers in the narrow design of the small size products, the use of molds or add gasket combination, which allows the product filled the air, man-made increased the distance between the inner surface of products that avoid the appearance of Newton's rings , would not have to frame design is very complex and difficult to produce a ventilation channel, but also can design the anchor attached to a small area.
Defects in the way inflation is not used in the temperature environment of rapid change, or large-size products. In particular, water-based adhesive printed products, as design is narrow, and difficult to operate, resulting in lack of bond strength. After the drastic changes in temperature, it is likely to cause leakage, gas leakage, the effect is gone to avoid Newton's rings. Many manufacturers of products in the factory warehouse on their own thermostat there is no problem, get the customer's normal storage place for a week, or simply just after a motor transport, the product of Newton's ring phenomenon occurs, that is the reason. So inflation is not to deal with Newton's rings the traditional remedy of a fresh recruit, use of the product if you do not consider the conditions and environment, together with other auxiliary craft with it, would not achieve a real effect.
Resistive touch screen sensitive areas of the ring, the same material thickness is a combination of various techniques and hot temperature and pressure parameters of inappropriate FPC generated, basically you can adjust the thickness of FPC materials and hot pressing parameters can be resolved.
For those watching from the distant large-size display products, because the pixel size is relatively large, can use 50 to 60 micron size of the support points, support points unless it is printed or anchor a high degree of uneven subsidence, generally does not appear Newton ring phenomenon.
V. Conclusion
Newton's rings, nothing more than parallel to the incident light and reflected light generated by mutual interference, such interference is only within a certain optical path difference will be revealed. To avoid the generation of Newton's rings, one approach is to disrupt the direction of light propagation, such as in resistive touch screen, use matte ITO FILM; in LCM polarizing films such as the use of glare; Another way is to ensure that the parallel surfaces, so that the radius of curvature within the table is large enough so that the dark Newton ring expansion to the product outside the loop region; there is greater difference between the two surfaces of the optical path, so that Newton's ring area falls on the dark ring Size Newton ring outside or to increase the distance between adjacent rings, dilute Newton rings. As long as the generation mechanism based on Newton's rings, in the production process to control the quality of Newton's rings is not a ghost.
2011年5月29日星期日
Boost computer touch screen software vendors revolution
Boost computer touch screen software vendors revolution, the global module production in 2014 nearly 120 million
According to iSuppli, an independent software vendor (ISV) will certainly thrive in the mobile and desktop PC market, the touch screen to play a central role, to provide differentiated characteristics, which makes the interface technology to attract new users and areas.
iSuppli forecasts that by 2014 a computer touch-screen module for the global production will surge to 117.9 million, while the 2010 is 15.8 million. The figure shows iSuppli company for computer touch-screen projections of global production, including desktop, mobile PC, and slate and tablet computer products.
ISV will be a touch screen key role in the revolution. Intense competition among ISV, have the necessary touch to develop new applications that will help promote the sales of the touch screen device - not only in the consumer field but also in key commercial areas. Whether these applications for Windows 7, Linux, Mac, or the development of a number of mobile operating systems, ISV will drive most of the touch application requirements.
Application focus
Apple introduced the iPhone and the iPod, and now introduced the iPad, first prove that the content is the key to touch the product.
Operating system providers are offering more components, to help people with touch applications, thus driving ISV competition.
Most Popular Tablet PC solutions may not provide the most wide doors that can lead to almost all the content on the network of those solutions, but to provide leads to the door or application-specific solutions, but these applications only through the specific brand or operating system to get. Apple iPad, with its development efforts specifically for the initial success of this approach is a good example. With the introduction of competitor products, is expected to have more focus on specific equipment vendors for application development activities, the attractiveness of the device-specific applications and equipment combined.
As manufacturers strive to differentiate their products, content and devices to access the content in a way, industrial design and products will be equally important.
Business investment in the above additional options, such as touch screen, usually related to productivity. To make the touch-screen sales in the area of substantial growth in business, manufacturers must work closely with the ISV to develop focus on enterprise customers to increase productivity solutions. HP is one touch solutions, one of the market leader, has been in and Priscilla Boston and other software vendors work closely to develop a variety of procedures, as it allows the user to select the wedding program can touch what you can change the wedding colors.
Some business-oriented applications may be cross-platform ISV development, from initial program development for mobile devices, to those used for enterprise and desktop programs. Users to consider various types of devices connected together, and in a more seamless transition between each other.
ISV is expected to promote the new touch-screen technology will also play an important role, while impressive for the application of these technologies.
Easy touch has always been a major consideration for manufacturers, and no doubt make Apple's product selection is projected capacitive technology, the main factor. In this technique, a simple touch can activate the touch option, so users can easily slide on the screen image. In the resistive touch screen, you need to use a larger power tap.
However, projected capacitive technology, the initial number of advantages may be a resistive touch solutions, offset by the advantages: the ability to detect pressure and efforts to provide under a different touch response. The success of digital resistance, will depend largely on application development, and the ISV to how fast the software design in an extra touch to add options, such as pressure testing. Possible future applications include use of stress testing games, music, art or business, this is just one of a few examples.
Resistive touch in the emphasis on business applications, ISV possible to build into a single button multi-function solution that allows users to change the way the touch buttons respond. Touch could open the primary menu, and heavier, you can touch some of the drop-down sub-menu.
With the software vendor mining possibilities inherent pressure sensitivity, such option may be portable touch screen driver PC market in the more important areas of differentiation factors. The favored solution may appear, such as Standum introduced digital resistive touch screen, and the introduction of interpolation Touchco force sensitive resistor (IFSR) technology.
Regional characteristics
ISV preferences in the region may also play an important role. Lenovo will attempt to launch its own Tablet PC LePad to consolidate its leadership position in the Chinese market. LePad plan to run a series of regional application and ISV developers to cooperate with local products for the preparation of the new applications.
serial lcd terminal, graphic terminal display
According to iSuppli, an independent software vendor (ISV) will certainly thrive in the mobile and desktop PC market, the touch screen to play a central role, to provide differentiated characteristics, which makes the interface technology to attract new users and areas.
iSuppli forecasts that by 2014 a computer touch-screen module for the global production will surge to 117.9 million, while the 2010 is 15.8 million. The figure shows iSuppli company for computer touch-screen projections of global production, including desktop, mobile PC, and slate and tablet computer products.
ISV will be a touch screen key role in the revolution. Intense competition among ISV, have the necessary touch to develop new applications that will help promote the sales of the touch screen device - not only in the consumer field but also in key commercial areas. Whether these applications for Windows 7, Linux, Mac, or the development of a number of mobile operating systems, ISV will drive most of the touch application requirements.
Application focus
Apple introduced the iPhone and the iPod, and now introduced the iPad, first prove that the content is the key to touch the product.
Operating system providers are offering more components, to help people with touch applications, thus driving ISV competition.
Most Popular Tablet PC solutions may not provide the most wide doors that can lead to almost all the content on the network of those solutions, but to provide leads to the door or application-specific solutions, but these applications only through the specific brand or operating system to get. Apple iPad, with its development efforts specifically for the initial success of this approach is a good example. With the introduction of competitor products, is expected to have more focus on specific equipment vendors for application development activities, the attractiveness of the device-specific applications and equipment combined.
As manufacturers strive to differentiate their products, content and devices to access the content in a way, industrial design and products will be equally important.
Business investment in the above additional options, such as touch screen, usually related to productivity. To make the touch-screen sales in the area of substantial growth in business, manufacturers must work closely with the ISV to develop focus on enterprise customers to increase productivity solutions. HP is one touch solutions, one of the market leader, has been in and Priscilla Boston and other software vendors work closely to develop a variety of procedures, as it allows the user to select the wedding program can touch what you can change the wedding colors.
Some business-oriented applications may be cross-platform ISV development, from initial program development for mobile devices, to those used for enterprise and desktop programs. Users to consider various types of devices connected together, and in a more seamless transition between each other.
ISV is expected to promote the new touch-screen technology will also play an important role, while impressive for the application of these technologies.
Easy touch has always been a major consideration for manufacturers, and no doubt make Apple's product selection is projected capacitive technology, the main factor. In this technique, a simple touch can activate the touch option, so users can easily slide on the screen image. In the resistive touch screen, you need to use a larger power tap.
However, projected capacitive technology, the initial number of advantages may be a resistive touch solutions, offset by the advantages: the ability to detect pressure and efforts to provide under a different touch response. The success of digital resistance, will depend largely on application development, and the ISV to how fast the software design in an extra touch to add options, such as pressure testing. Possible future applications include use of stress testing games, music, art or business, this is just one of a few examples.
Resistive touch in the emphasis on business applications, ISV possible to build into a single button multi-function solution that allows users to change the way the touch buttons respond. Touch could open the primary menu, and heavier, you can touch some of the drop-down sub-menu.
With the software vendor mining possibilities inherent pressure sensitivity, such option may be portable touch screen driver PC market in the more important areas of differentiation factors. The favored solution may appear, such as Standum introduced digital resistive touch screen, and the introduction of interpolation Touchco force sensitive resistor (IFSR) technology.
Regional characteristics
ISV preferences in the region may also play an important role. Lenovo will attempt to launch its own Tablet PC LePad to consolidate its leadership position in the Chinese market. LePad plan to run a series of regional application and ISV developers to cooperate with local products for the preparation of the new applications.
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2011年5月26日星期四
Use of digital power system management and lower data center power consumption
Management functions with a digital DC / DC converter enables designers to develop a "green" power systems, such power system to meet the target performance, and work processes through re-arranging some of the tasks will be transferred to those who work less than The server (which may be off to other servers) to determine when to reduce overall power consumption.
For years, many companies are carried out on the digital power hype, some companies think: digital power, including digital and a communication link with power. Some other companies, said: Digital power is a kind of a digital pulse-width modulation (PWM) built-chip state machine. There are some manufacturers that: includes a digital power supply to run an algorithm (the algorithm used to compensate for control loop) of the general-purpose digital signal processor (DSP), and only rely on a digital serial bus and can not provide power solutions . There are even other companies that: digital power supply has a state machine or a DSP with digital PWM loop. All of these descriptions can be said to be very puzzled, confused, and some of these methods can not produce good performance. However, in the digital power supply design the right circumstances, it can reduce data center power consumption, shorten product time to market with excellent stability and transient response performance, and improve overall system reliability (such as network equipment in).
Network equipment system designers are faced with upgrading their systems and increase data throughput and performance of functions and features of the pressure. At the same time, how to reduce the system's total power consumption is also necessary to deal with their problems. In the data center, the challenge is that people need to rearrange some of the tasks workflow will be transferred to those who work less than the server (which may be off to other servers) to reduce overall power consumption. To meet these needs, understand the end-user equipment power consumption is very important. Properly designed digital power management system can provide users with power consumption data, so that you can make a flexible energy management decisions.
In today's new electronic system, the state regulator may be the last remaining "blind spots", because generally they do not have the key operating parameters of the direct method of configuration or remote monitoring. For reliable operation, the detection time of the regulator output voltage drift or overheating and accordingly take the appropriate action can be said to be crucial. Well-designed digital power system management (DPSM) program to monitor the performance of the regulator and reported its operation to beyond specification range even in its failure to take corrective action before.
For the DPSM for voltage regulators and power supply design engineers to carefully review the requirements of a learning curve to understand how a computer's graphical user interface (GUI) to complete the programming of such devices and connections. This includes learning new programming software, and each company to provide digital power device has its own unique package. Therefore, we should have a choice after careful thought and a user-friendly software package and the GUI of the company, which is very important. In addition, they should have a reputable technical support staff, the team has such power in the design process to provide the necessary capabilities to help.
Multitrack board power systems
Most embedded systems are powered by a 48V backplane. Usually the voltage step-down to a lower intermediate-bus voltage (typically 12V to 3.3V), circuit boards within the system that support power supply. However, these sub-circuit board or IC need to lower the voltage range of 1V to 3.3V and the dozens to hundreds of A, mA current range operations. Therefore, to the intermediate bus voltage step-down sub-circuit, or IC to the expectations of the required voltage point of load (POL) DC / DC converter is essential. These power rails has a strict ordering, voltage accuracy, margin adjustment and monitoring requirements.
In data communications, telecommunications or storage system, there could be as many as 20 POL voltage rail, system designers need a voltage in accordance with its output, sort, and the maximum allowable current management of these voltage rails simple way. Some processors require the I / O voltage is increased until the voltage at its core, while others require the DSP core voltage of the first of its I / O voltage rises. Power sequencing is also indispensable. Designers need a simple adjustment method to optimize the system performance and storage for each DC / DC converter specific configuration to achieve the purpose of simplifying the design work.
In order to avoid expensive ASIC possibility of being over-voltage conditions, high-speed comparator to monitor the voltage of each supply rail, and beyond the supply rails in a safe operating limits of its range specified to take immediate protective measures. In the digital power supply system, in the event of a fault line through the PMBus alert notification host, and will be off the rails in order for electrical components, such as implemented by ASIC and other protection. Achieve this level of protection needed better accuracy and response time of some tens of μs.
Linear Technology's recently introduced LTC3880/-1 provides a highly accurate digital power system management, and use its high-resolution remote sensing programmability and fast read-back key to achieving real-time control point of load converters, and monitoring functions. The device is a dual output, high efficiency synchronous step-down DC / DC controller with I2C based on the PMBus interface and more than 100 orders and on-board EEPROM. LTC3880/-1 both best in class performance analog switching regulator controller and precision mixed-signal data conversion, can be very easy to implement power system design and management, the device has been based graphical user interface with easy to use (GUI) The LTpowerPlayTM software development system support.
Digital power system management for the control interface
PMBus command language designed to meet the needs of large-scale development of multi-track system is a fully defined command language using the open standard power management protocol that simplifies and power converters, power management devices and the system host processor communication. In addition to a precise definition of the standard commands, consistent with the standard PMBus device also can perform its unique special order, to provide a kind of POLDC / DC converters for programming and monitoring of innovative methods. The agreement with the industry standard SMBus serial interface to perform and achieve power conversion products, programming, control and real-time monitoring. Command language and data format standardization can achieve simple firmware development, thereby speeding up the product to market process. For more information, please visit http://pmbus.org/ website.
LTC3880/-1 programmable control parameters include output voltage margining, current limit, input and output control limits on the power-up sequencing and tracking, switching frequency, identification and traceability data. On-chip EEPROM precision data converters and voltage regulators allow the collection of configuration settings and remote sensing variable values, including the input and output voltage and current, duty cycle, temperature and fault records, and these settings and variables for non-volatile volatile storage. Table 1 lists the following program can be LTC3880/-1 some of the parameters, the high-resolution, remote back to reading skills and alternative solutions.
Analog control loop
LTC3880/-1 is a suitable number of features (for example: output voltage, current limit set point and sorting, etc.) digital programmable DC / DC controller, but it has a loop designed for optimal stability and transient response of the analog feedback control loop, but not the quantitative effects of digital control loop.
Figure 2 shows the feedback control loop analog and digital feedback control loop, the controller IC inside curves of different slopes. Analog loop with a smooth slope, and digital loop is similar to a step function - this will cause stability problems, slowing the speed of transient response and, in some applications, resulting in the need to increase the output capacitor, and digital quantify the effect of the loop will result in increased output ripple.
One of the main advantages of digital power supply is available to predict system failure and the potential to start protective measures, which benefited from the provision of real-time telemetry data. Perhaps the most important point is: with digital management features DC / DC converter enables designers to develop a "green" power system, such a power system to meet the target performance, and be able to rearrange work processes and some Task transferred to those who work less than the server (which may be off to other servers) to determine when to reduce overall power consumption. As the load point, circuit boards, brackets, even the installation of level of energy use very little, thus helping to reduce infrastructure costs and product life cycle total cost of ownership.
Another digital power system management can reduce the design cost advantage and accelerate time to market. By using a intuitive GUI with integrated development environment, you can efficiently develop complex multi-track system. Such systems also through the use of GUI (rather than welding assembly) to adjust and simplify the online test (ICT) and board debugging.
On the definition and benefits of digital power, and now the situation has become confusing. Therefore, the digital power supply is necessary for potential users want to achieve their goals and benefits of digital power system management, the suitability of its products and customers to do investigations. They must determine their own choice of company has a high-performance analog devices, the most popular and easy to use software package, as well as a well-educated, willing to provide the necessary technical support team to help. Fortunately, such companies exist.
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For years, many companies are carried out on the digital power hype, some companies think: digital power, including digital and a communication link with power. Some other companies, said: Digital power is a kind of a digital pulse-width modulation (PWM) built-chip state machine. There are some manufacturers that: includes a digital power supply to run an algorithm (the algorithm used to compensate for control loop) of the general-purpose digital signal processor (DSP), and only rely on a digital serial bus and can not provide power solutions . There are even other companies that: digital power supply has a state machine or a DSP with digital PWM loop. All of these descriptions can be said to be very puzzled, confused, and some of these methods can not produce good performance. However, in the digital power supply design the right circumstances, it can reduce data center power consumption, shorten product time to market with excellent stability and transient response performance, and improve overall system reliability (such as network equipment in).
Network equipment system designers are faced with upgrading their systems and increase data throughput and performance of functions and features of the pressure. At the same time, how to reduce the system's total power consumption is also necessary to deal with their problems. In the data center, the challenge is that people need to rearrange some of the tasks workflow will be transferred to those who work less than the server (which may be off to other servers) to reduce overall power consumption. To meet these needs, understand the end-user equipment power consumption is very important. Properly designed digital power management system can provide users with power consumption data, so that you can make a flexible energy management decisions.
In today's new electronic system, the state regulator may be the last remaining "blind spots", because generally they do not have the key operating parameters of the direct method of configuration or remote monitoring. For reliable operation, the detection time of the regulator output voltage drift or overheating and accordingly take the appropriate action can be said to be crucial. Well-designed digital power system management (DPSM) program to monitor the performance of the regulator and reported its operation to beyond specification range even in its failure to take corrective action before.
For the DPSM for voltage regulators and power supply design engineers to carefully review the requirements of a learning curve to understand how a computer's graphical user interface (GUI) to complete the programming of such devices and connections. This includes learning new programming software, and each company to provide digital power device has its own unique package. Therefore, we should have a choice after careful thought and a user-friendly software package and the GUI of the company, which is very important. In addition, they should have a reputable technical support staff, the team has such power in the design process to provide the necessary capabilities to help.
Multitrack board power systems
Most embedded systems are powered by a 48V backplane. Usually the voltage step-down to a lower intermediate-bus voltage (typically 12V to 3.3V), circuit boards within the system that support power supply. However, these sub-circuit board or IC need to lower the voltage range of 1V to 3.3V and the dozens to hundreds of A, mA current range operations. Therefore, to the intermediate bus voltage step-down sub-circuit, or IC to the expectations of the required voltage point of load (POL) DC / DC converter is essential. These power rails has a strict ordering, voltage accuracy, margin adjustment and monitoring requirements.
In data communications, telecommunications or storage system, there could be as many as 20 POL voltage rail, system designers need a voltage in accordance with its output, sort, and the maximum allowable current management of these voltage rails simple way. Some processors require the I / O voltage is increased until the voltage at its core, while others require the DSP core voltage of the first of its I / O voltage rises. Power sequencing is also indispensable. Designers need a simple adjustment method to optimize the system performance and storage for each DC / DC converter specific configuration to achieve the purpose of simplifying the design work.
In order to avoid expensive ASIC possibility of being over-voltage conditions, high-speed comparator to monitor the voltage of each supply rail, and beyond the supply rails in a safe operating limits of its range specified to take immediate protective measures. In the digital power supply system, in the event of a fault line through the PMBus alert notification host, and will be off the rails in order for electrical components, such as implemented by ASIC and other protection. Achieve this level of protection needed better accuracy and response time of some tens of μs.
Linear Technology's recently introduced LTC3880/-1 provides a highly accurate digital power system management, and use its high-resolution remote sensing programmability and fast read-back key to achieving real-time control point of load converters, and monitoring functions. The device is a dual output, high efficiency synchronous step-down DC / DC controller with I2C based on the PMBus interface and more than 100 orders and on-board EEPROM. LTC3880/-1 both best in class performance analog switching regulator controller and precision mixed-signal data conversion, can be very easy to implement power system design and management, the device has been based graphical user interface with easy to use (GUI) The LTpowerPlayTM software development system support.
Digital power system management for the control interface
PMBus command language designed to meet the needs of large-scale development of multi-track system is a fully defined command language using the open standard power management protocol that simplifies and power converters, power management devices and the system host processor communication. In addition to a precise definition of the standard commands, consistent with the standard PMBus device also can perform its unique special order, to provide a kind of POLDC / DC converters for programming and monitoring of innovative methods. The agreement with the industry standard SMBus serial interface to perform and achieve power conversion products, programming, control and real-time monitoring. Command language and data format standardization can achieve simple firmware development, thereby speeding up the product to market process. For more information, please visit http://pmbus.org/ website.
LTC3880/-1 programmable control parameters include output voltage margining, current limit, input and output control limits on the power-up sequencing and tracking, switching frequency, identification and traceability data. On-chip EEPROM precision data converters and voltage regulators allow the collection of configuration settings and remote sensing variable values, including the input and output voltage and current, duty cycle, temperature and fault records, and these settings and variables for non-volatile volatile storage. Table 1 lists the following program can be LTC3880/-1 some of the parameters, the high-resolution, remote back to reading skills and alternative solutions.
Analog control loop
LTC3880/-1 is a suitable number of features (for example: output voltage, current limit set point and sorting, etc.) digital programmable DC / DC controller, but it has a loop designed for optimal stability and transient response of the analog feedback control loop, but not the quantitative effects of digital control loop.
Figure 2 shows the feedback control loop analog and digital feedback control loop, the controller IC inside curves of different slopes. Analog loop with a smooth slope, and digital loop is similar to a step function - this will cause stability problems, slowing the speed of transient response and, in some applications, resulting in the need to increase the output capacitor, and digital quantify the effect of the loop will result in increased output ripple.
One of the main advantages of digital power supply is available to predict system failure and the potential to start protective measures, which benefited from the provision of real-time telemetry data. Perhaps the most important point is: with digital management features DC / DC converter enables designers to develop a "green" power system, such a power system to meet the target performance, and be able to rearrange work processes and some Task transferred to those who work less than the server (which may be off to other servers) to determine when to reduce overall power consumption. As the load point, circuit boards, brackets, even the installation of level of energy use very little, thus helping to reduce infrastructure costs and product life cycle total cost of ownership.
Another digital power system management can reduce the design cost advantage and accelerate time to market. By using a intuitive GUI with integrated development environment, you can efficiently develop complex multi-track system. Such systems also through the use of GUI (rather than welding assembly) to adjust and simplify the online test (ICT) and board debugging.
On the definition and benefits of digital power, and now the situation has become confusing. Therefore, the digital power supply is necessary for potential users want to achieve their goals and benefits of digital power system management, the suitability of its products and customers to do investigations. They must determine their own choice of company has a high-performance analog devices, the most popular and easy to use software package, as well as a well-educated, willing to provide the necessary technical support team to help. Fortunately, such companies exist.
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Prosperous LCD Module Manufacturer---Synlink
With its various and up-grading products, Synlink Technology Co Limited is becoming one of the leading powers in the field of LCD module technologies, which encourages a growing number of advanced LCD display module manufactures and popularizes the utility of intelligent LCD module products.
Synlink as an experienced LCD module manufacturer provides its customers with Smart UART LCM and Intelligent MCU products. Furthermore, Synlink perfect its services by offering complete solutions and high added-value technical supports. Meanwhile efforts made in domestic markets, Synlink is also exploring the vast markets overseas and especially in Europe , establishes its widely admirations and highly trusts with high- performance products.
A European subsidiary is prepared to establish in the near future to broad the business. To provide customers a satisfactory service, Synlink experts steadily develop and upgrade the display control technology: the intelligent LCD module products of Synlink are of various sizes. These LCD modules are displayed graphically and characteristically, what makes our product more extraordinary is the touch screen function, efficiently saves time in the market. No matter your enterprise needs to Buy LCD module, getting more information or seeking for cooperation opportunities, please contact us on the website, our on-line Q&A will be at your service.
2011年5月25日星期三
AT056TN04 LCD Driver Controller
As a large screen resolution than analog, glass line will be more dense, the cost of higher technology and backlight, the color less demanding in the field of industrial instrumentation, low-cost analog color LCD screen has become the first choice. FPGA technology presents a color LCD drive controller design using hardware description language to complete the LCD timing and memory interfaces, the successful implementation of the 8 basic colors AT056TN04 display, both to overcome the color monotone monochrome LCD modules, color-rich expensive digital color screen shortcomings, but also has shown a small amount of data the user the advantages of simple operation. Appropriate adjustments can be easily applied to other analog color LCD screen, in the industrial instrumentation has good application value.
To make the products in the market competition in a strong position in the industrial instrumentation, the monochrome LCD color screen gradually being replaced is an inevitable trend. Since high resolution digital color screen, the glass will be more dense line, process and screen backlight will be higher cost than analog. Therefore, less demanding on the color of the field of industrial instrumentation, has become the preferred low-cost analog screen. The design of instrumentation for industrial applications in the background with a good group of record companies TFT analog LCD screen AT056TN04, using FPGA technology to achieve the drive controller design.
1 shows the memory arrangement
LCD timing controller driver is in control of the system clock, line clock and frame synchronization clock synchronization under the control loop to put data in the display memory to the LCD screen, while under the control of the microprocessor memory data updates. To simplify the design, each color pixel LCD screen, 1 b are used to quantify 8 basic colors can be achieved, the circuit simple. To facilitate the structural arrangement, the LCD screen coordinates of upper left corner of the first point (0,0), lower right corner coordinates (233,319). 64 KB of SRAM used as a display memory, each memory cell, said the LCD screen 8 adjacent pixels of a color component, in which the red end of the address stored in the unit 00, the green is 01, blue 10. Although the waste end of the address is 11 units, addressing is very convenient. 16-bit address lines as the high 8-bit row address, the middle 6 bits for the column address, low address two of the colors.
2 Design of LCD driver timing
AT056TN04 drive signals of the most important interface signals are: the frame start pulse STV, scan driver shift clock CKV, scan driver output enable control OEV, a common electrode driving signal Vcom, data-driven output enable control of OEH, line scanning start pulse STH, data sampling and the shift clock CPH. AT056TN04 display process is as follows: first, the frame start signal STV starts a data display, over time OEV tOEV from low to high maintenance and then high to low, while VCOM transitions, OEH and then descending to maintain tOEH transition from low to high, after tDIS1 STH after the transition from low to high, and then maintain tSTH transition from high to low to start the first line of the display. During this period CKV maintain tCKV from low to high after the high to low. Line after completion, and then replaced one line display, so to repeat down. After a frame data, and then the cycle of this process, the details of the timing shown in Figure 1.
Figure in all time intervals are integer multiple of CPH, CPH therefore count with the counter tcph on to determine the value of tcph other control signals can be generated, while ensuring that each group signal synchronization. Time requirements of the interface signals in AT056TN04 has been given in the manual, CPH is the smallest unit of the timing, the cycle is 154 ns, the error can not exceed 4 ns. Active with 13 MHz crystal clock cycle 76.9 ns, its divided by 2 to get the CPH 153.8 ns clock. AT056TN04 each frame contains 256 ~ 268 lines of data, the real number is 234-line display line, the last of the small number of lines of data is not displayed. External controller can not display the data in these rows in the display memory read and write operations. The design of the data shows the number of lines per frame is set to 260 lines, then STV is that every line will produce a pulse of 260, with a line counter th, when tcpvh 260 (the line shows end) plus 1, after th, to generate STV, STV appears to delay tSV (3 lines)
3 LCD screen refresh module design
AT056TN04 configured to scan from left to right from top to bottom, each time point into the memory 8 tri-color information (3 B), CPH clock every three bytes of RGB data simultaneously to the left one, in The RGB output pin connected PFGA 4.7 kΩ pull-up resistor to 5 V power supply, resulting in VR, VG, VB signal drive the LCD screen. In the RAM read and write control module under the action and timing module in the controller will display RAM to the cycle of image data displayed on the LCD screen. Th and tcpvh to use the counter generated address easy to achieve on the RAM read and write operations. Th value as the row address them with, tcph [9:4] as the column address, tcph [1: O] as the color of the address.
4 Conclusion
Memory at a reasonable arrangement and design of the ranks of the counter based on timing control cleverly done and the liquid crystal display memory read and write data to achieve 8 of AT056TN04 basic colors of the display control. As a result of FPGA design, a slightly modified form can be applied to other soft-core LCD tft module, Color overcome the monotonous monochrome LCD module, and the color rich digital color screen expensive shortcomings. Of color in less demanding industrial instrumentation has a certain value.
To make the products in the market competition in a strong position in the industrial instrumentation, the monochrome LCD color screen gradually being replaced is an inevitable trend. Since high resolution digital color screen, the glass will be more dense line, process and screen backlight will be higher cost than analog. Therefore, less demanding on the color of the field of industrial instrumentation, has become the preferred low-cost analog screen. The design of instrumentation for industrial applications in the background with a good group of record companies TFT analog LCD screen AT056TN04, using FPGA technology to achieve the drive controller design.
1 shows the memory arrangement
LCD timing controller driver is in control of the system clock, line clock and frame synchronization clock synchronization under the control loop to put data in the display memory to the LCD screen, while under the control of the microprocessor memory data updates. To simplify the design, each color pixel LCD screen, 1 b are used to quantify 8 basic colors can be achieved, the circuit simple. To facilitate the structural arrangement, the LCD screen coordinates of upper left corner of the first point (0,0), lower right corner coordinates (233,319). 64 KB of SRAM used as a display memory, each memory cell, said the LCD screen 8 adjacent pixels of a color component, in which the red end of the address stored in the unit 00, the green is 01, blue 10. Although the waste end of the address is 11 units, addressing is very convenient. 16-bit address lines as the high 8-bit row address, the middle 6 bits for the column address, low address two of the colors.
2 Design of LCD driver timing
AT056TN04 drive signals of the most important interface signals are: the frame start pulse STV, scan driver shift clock CKV, scan driver output enable control OEV, a common electrode driving signal Vcom, data-driven output enable control of OEH, line scanning start pulse STH, data sampling and the shift clock CPH. AT056TN04 display process is as follows: first, the frame start signal STV starts a data display, over time OEV tOEV from low to high maintenance and then high to low, while VCOM transitions, OEH and then descending to maintain tOEH transition from low to high, after tDIS1 STH after the transition from low to high, and then maintain tSTH transition from high to low to start the first line of the display. During this period CKV maintain tCKV from low to high after the high to low. Line after completion, and then replaced one line display, so to repeat down. After a frame data, and then the cycle of this process, the details of the timing shown in Figure 1.
Figure in all time intervals are integer multiple of CPH, CPH therefore count with the counter tcph on to determine the value of tcph other control signals can be generated, while ensuring that each group signal synchronization. Time requirements of the interface signals in AT056TN04 has been given in the manual, CPH is the smallest unit of the timing, the cycle is 154 ns, the error can not exceed 4 ns. Active with 13 MHz crystal clock cycle 76.9 ns, its divided by 2 to get the CPH 153.8 ns clock. AT056TN04 each frame contains 256 ~ 268 lines of data, the real number is 234-line display line, the last of the small number of lines of data is not displayed. External controller can not display the data in these rows in the display memory read and write operations. The design of the data shows the number of lines per frame is set to 260 lines, then STV is that every line will produce a pulse of 260, with a line counter th, when tcpvh 260 (the line shows end) plus 1, after th, to generate STV, STV appears to delay tSV (3 lines)
3 LCD screen refresh module design
AT056TN04 configured to scan from left to right from top to bottom, each time point into the memory 8 tri-color information (3 B), CPH clock every three bytes of RGB data simultaneously to the left one, in The RGB output pin connected PFGA 4.7 kΩ pull-up resistor to 5 V power supply, resulting in VR, VG, VB signal drive the LCD screen. In the RAM read and write control module under the action and timing module in the controller will display RAM to the cycle of image data displayed on the LCD screen. Th and tcpvh to use the counter generated address easy to achieve on the RAM read and write operations. Th value as the row address them with, tcph [9:4] as the column address, tcph [1: O] as the color of the address.
4 Conclusion
Memory at a reasonable arrangement and design of the ranks of the counter based on timing control cleverly done and the liquid crystal display memory read and write data to achieve 8 of AT056TN04 basic colors of the display control. As a result of FPGA design, a slightly modified form can be applied to other soft-core LCD tft module, Color overcome the monotonous monochrome LCD module, and the color rich digital color screen expensive shortcomings. Of color in less demanding industrial instrumentation has a certain value.
2011年5月24日星期二
Car dashboard application
Recently, many customers are quite interested in the video file we post in our home page. This video file is about a demo program of a car dashboard, which is a basic application of our LCD module. Usually, the display is used for replacing a dashboard in a rally and competitions car. The LCD module shall be able to show the most important parameter of car situation like RPM, speed, fuel pressure, oil pressure and so on. Some customers need a high contrast display for seeing it in every moment of day, even under the sun or in the middle of night. For this application, touch panel is not a must, so we recommend customers to select the LCD module without touch screen because the stability situation will be better.
In fact, it is quite easy to finish the design.
First, make images that will be used for the project. For that demo, our designer made 85 images. The pointers are at different positions on each image.
Second, once the sensor gets data from outside, make the MCU to send command 0x70 to our LCD module to display the corresponding picture. For example, when the speed is 80, make your MCU to display the picture on which the pointer is at 80.
Third, in this way, the dashboard will be automotive as per the data from sensor.
Note: Command 0x70 is to display the picture at specific positon in the flash. The format is AA 70 PIC_ID CC 33 C3 3C.(AA as frame header, 70 as the command for displaying pictures, PIC_ID as the ID of the picture when you save it into the flash, CC 33 C3 3C as the frame end)
Finally, we are in the position to provide technical support. If you have specific requirements, we can help you for the programming on the LCD modules.
In fact, it is quite easy to finish the design.
First, make images that will be used for the project. For that demo, our designer made 85 images. The pointers are at different positions on each image.
Second, once the sensor gets data from outside, make the MCU to send command 0x70 to our LCD module to display the corresponding picture. For example, when the speed is 80, make your MCU to display the picture on which the pointer is at 80.
Third, in this way, the dashboard will be automotive as per the data from sensor.
Note: Command 0x70 is to display the picture at specific positon in the flash. The format is AA 70 PIC_ID CC 33 C3 3C.(AA as frame header, 70 as the command for displaying pictures, PIC_ID as the ID of the picture when you save it into the flash, CC 33 C3 3C as the frame end)
Finally, we are in the position to provide technical support. If you have specific requirements, we can help you for the programming on the LCD modules.
2011年5月23日星期一
Industrial TFT Display
Industrial TFT display, or LCD modules for short, consists of an LCD cell, back light unit, PCB, driving IC chips, and plastic frames. An LCD cell is the key component of an LCD module. It consists of a TFT glass, a color filter glass, and liquid crystal filled in between the TFT glass and color filter (CF) glass.
LCD module manufacturers now mainly distribute in China, Korea, and Japan. Often an LCD factory is composed of these four parts:
(1) A TFT fab, where thin film transistors are formed on raw glasses.
(2) A CF fab ,where color filters are formed on raw glasses.
(3) An LC assembled fab, where TFT and CF glasses are assembled and liquid crystal is filled in between, and cut into panel-sizes.
(4) A Module line where final assembly operations are performed mostly by human operators.
TFT display process time and step numbers are the important factors to manufacturers.Usually, fabrication of a typical industrial TFTrequires 30~40 steps and its turn-around time is about 48 hours. And the CF fabrication process often consist of 15~20 steps,with a fab turn-around time of about 24 hours. The LC assembled fab produces LCD cells from industrial TFT glasses and CF glasses,with a turn-around time of 10~12 hours and about 15 steps. For example,in a 7th generation LCD Fab,eight LCD cells of 40 inches panel size are produced from a pair of TFT and CF glasses. The produced LCD cells are graded into 3~6 levels depending on their quality level.In the Module line,industrial LCD displays cell is assembled with external parts such as back light unit,polarizer,and PCB. For a given product type of LCD cell,10~30 options of LCD module are obtained depending on the specifications of the external parts. Since there are more than a dozen product (LCD cell) types, the total number of options (of industrial flat panel display) is quite large.Thus,careful synchronization of external parts supply with internal production schedule of LCD cells is very critical.
LCD module manufacturers now mainly distribute in China, Korea, and Japan. Often an LCD factory is composed of these four parts:
(1) A TFT fab, where thin film transistors are formed on raw glasses.
(2) A CF fab ,where color filters are formed on raw glasses.
(3) An LC assembled fab, where TFT and CF glasses are assembled and liquid crystal is filled in between, and cut into panel-sizes.
(4) A Module line where final assembly operations are performed mostly by human operators.
TFT display process time and step numbers are the important factors to manufacturers.Usually, fabrication of a typical industrial TFTrequires 30~40 steps and its turn-around time is about 48 hours. And the CF fabrication process often consist of 15~20 steps,with a fab turn-around time of about 24 hours. The LC assembled fab produces LCD cells from industrial TFT glasses and CF glasses,with a turn-around time of 10~12 hours and about 15 steps. For example,in a 7th generation LCD Fab,eight LCD cells of 40 inches panel size are produced from a pair of TFT and CF glasses. The produced LCD cells are graded into 3~6 levels depending on their quality level.In the Module line,industrial LCD displays cell is assembled with external parts such as back light unit,polarizer,and PCB. For a given product type of LCD cell,10~30 options of LCD module are obtained depending on the specifications of the external parts. Since there are more than a dozen product (LCD cell) types, the total number of options (of industrial flat panel display) is quite large.Thus,careful synchronization of external parts supply with internal production schedule of LCD cells is very critical.
2011年5月22日星期日
EMC problems of TFT-LCD Driver IC
TFT LCD module requires low EMI (Electro Magnetic Interference) characteristics for Home appliances.As we know,TFT- LCD module violates EMC specification more frequently than CRT in the FCC regulations.That is because LCD module (LCM) has a lot of high-frequency and high-speed electronic devices.These devices include time controller or LCD display driver ICs.These devices as EMI noise sources,since the clock frequency of interface for devices usually is several hundreds of kilohertz.The phenomenon causes EMC problems in LCM.
EMC solution method is divided into three levels:IC level, plane level and system level.For LCD module, the plane level approach is the general method in the industry. TFT-LCD module is constituted of LCD panel,main SMPS,time controller (source PCB),and others.EMC problems of LCD module are fixed traditionally by the amendment of time controller because ICs in time controller operate at high frequency.It depends on attaching or detaching beads and bypass or decoupling capacitors.This method is restricted to the specific display resolution or LCD panel size because time controller is designed separately according to LCD panel size.Whereas source PCB, LCD Driver IC is nearly irrelevant to LCD module specification.
For the analysis of EMC problems,LDI in IC level is the important part simulated,due to LDI is one of the EMI noise source.The recently research indicated that the power or ground noise reduction of LDI must be more fundamental solution for EMC problem in TFT-LCD module than conventional coverage.And a logical design for EMC can be applicable to such LDI.
EMC solution method is divided into three levels:IC level, plane level and system level.For LCD module, the plane level approach is the general method in the industry. TFT-LCD module is constituted of LCD panel,main SMPS,time controller (source PCB),and others.EMC problems of LCD module are fixed traditionally by the amendment of time controller because ICs in time controller operate at high frequency.It depends on attaching or detaching beads and bypass or decoupling capacitors.This method is restricted to the specific display resolution or LCD panel size because time controller is designed separately according to LCD panel size.Whereas source PCB, LCD Driver IC is nearly irrelevant to LCD module specification.
For the analysis of EMC problems,LDI in IC level is the important part simulated,due to LDI is one of the EMI noise source.The recently research indicated that the power or ground noise reduction of LDI must be more fundamental solution for EMC problem in TFT-LCD module than conventional coverage.And a logical design for EMC can be applicable to such LDI.
2011年5月16日星期一
LED display maintenance detection method and steps
A, LED display maintenance detection method
1, short-circuit detection, the multimeter transferred to short-circuit detection block (usually with alarm functions, such as General issued the calls of lead) to detect whether the phenomenon of short circuit was found to be immediately resolved after short circuit, short circuit LED display is the most common screen module failure. Others by observing IC pin pin pin and can be found. Short-circuit detection circuit power should be the case in the operation to avoid damage to the multimeter. This method is most commonly used method is simple and efficient. 90% of the fault can be detected by the judge.
2, the resistance detection method, will be transferred to resistance profile multimeter to detect a normal circuit board of a point to ground resistance values, and then test another piece of the same circuit board with a points test and the normal resistance value is different, If the difference is to determine the scope of the problem.
3, the voltage detection method, will be transferred to voltage profile multimeter to detect suspected problems to a point in the circuit ground voltage, compare it with the normal similarity, you can easily determine the scope of the problem.
4, the voltage drop detection, the multimeter test file transferred to the diode voltage drop, because all the IC are composed of integral parts of many units, but small, so when it's in there is a current of a pin when the There will be voltage drop in the pin. Generally the same type of IC similar to the same pin drop, according to the value of comparing the voltage drop on pin good or bad, to be without power in the circuit operation.
Second, LED display essential tool for maintenance
1, the electric iron + sniffing each one, a number of solder
2,5 V power supply 1, for receiving cards and maintenance of power supply module or unit board
3, the power granted one, for quick removal module or unit board
4, computer + send cards, send a program used to receiving card
5, the receiving card + HUB board, graphic lcd module or unit board for the observed symptoms
6, a multimeter, for the detection of specific fault module or unit board
7, tweezers, scissors, pliers each one
Third, basic steps to repair
1, determine the use of modular or unit board HUB board type, so that the interface cable to the same definition of
2, depending on the type of module or unit board, to the receiving card to send the appropriate procedures to ensure that the correct module and cell board under the procedures in the show, which is to identify the cause of the malfunction of the premise. General China LCD module will be printed on the module or unit board models.
3, the observation LCD TFT module, or unit board phenomenon, to determine the initial failure. For example, a common blind lights, strings, little boxes and so on.
5, using the multimeter to find fault, mainly using the above short-circuit detection, between the chip and pin to detect light.
6, Maintenance
7, re-testing
1, short-circuit detection, the multimeter transferred to short-circuit detection block (usually with alarm functions, such as General issued the calls of lead) to detect whether the phenomenon of short circuit was found to be immediately resolved after short circuit, short circuit LED display is the most common screen module failure. Others by observing IC pin pin pin and can be found. Short-circuit detection circuit power should be the case in the operation to avoid damage to the multimeter. This method is most commonly used method is simple and efficient. 90% of the fault can be detected by the judge.
2, the resistance detection method, will be transferred to resistance profile multimeter to detect a normal circuit board of a point to ground resistance values, and then test another piece of the same circuit board with a points test and the normal resistance value is different, If the difference is to determine the scope of the problem.
3, the voltage detection method, will be transferred to voltage profile multimeter to detect suspected problems to a point in the circuit ground voltage, compare it with the normal similarity, you can easily determine the scope of the problem.
4, the voltage drop detection, the multimeter test file transferred to the diode voltage drop, because all the IC are composed of integral parts of many units, but small, so when it's in there is a current of a pin when the There will be voltage drop in the pin. Generally the same type of IC similar to the same pin drop, according to the value of comparing the voltage drop on pin good or bad, to be without power in the circuit operation.
Second, LED display essential tool for maintenance
1, the electric iron + sniffing each one, a number of solder
2,5 V power supply 1, for receiving cards and maintenance of power supply module or unit board
3, the power granted one, for quick removal module or unit board
4, computer + send cards, send a program used to receiving card
5, the receiving card + HUB board, graphic lcd module or unit board for the observed symptoms
6, a multimeter, for the detection of specific fault module or unit board
7, tweezers, scissors, pliers each one
Third, basic steps to repair
1, determine the use of modular or unit board HUB board type, so that the interface cable to the same definition of
2, depending on the type of module or unit board, to the receiving card to send the appropriate procedures to ensure that the correct module and cell board under the procedures in the show, which is to identify the cause of the malfunction of the premise. General China LCD module will be printed on the module or unit board models.
3, the observation LCD TFT module, or unit board phenomenon, to determine the initial failure. For example, a common blind lights, strings, little boxes and so on.
5, using the multimeter to find fault, mainly using the above short-circuit detection, between the chip and pin to detect light.
6, Maintenance
7, re-testing
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