Certainly the best IPS panel
With the increasing demand of consumers , many photography enthusiasts or players can not find a primary design display products in the Heart of the overall delisting after CRT monitors , LCD monitors because TN panels can not meet their needs in terms of reliability of color , and wide viewing angle LCD price too expensive. But this year appeared on the market using low-cost panel display products are well up for this gap, but also become the focus of chase .
Cheap wide angle LCD has become a hot topic in recent years
In these displays on the market used mainly from the C-PVA panel , MVA panel and the launch of three IPS panel specifications . But be induced by lack of expertise in the field of television and salespeople , many consumers have a wrong idea : IPS panel is the best. To actually ask inquisitive IPS panel in the end was good , I believe that consumers rarely say the system .
VA class IPS panel with wide viewing angle panel have their own advantages and disadvantages , OLED Display
Module not the presence of overwhelming victory
VA classes and a wide viewing angle panel compared the advantages of IPS panel is relatively fast response time, and more accurate color reproduction ; while the VA class is the biggest advantage of the panel have a higher contrast ratio ( note that this is not a dynamic contrast ratio, and static contrast ratio ) , many with C-PVA or MVA LCD monitors are equipped with 3000:1 native contrast ratio , such as Samsung F2380, BenQ " steel Man" series LCD EW2430V etc. , in addition to BenQ also said it will launch a native contrast ratio of up to 5000 : 1 MVA wide viewing angle panel products ( BenQ will call Li Rui black screen ) and high contrast is able to demonstrate the advantages of a richer picture level , while more pure black screen , help watch movies , play games ; high enough contrast IPS panel has also been plagued by problems , there are many user feedback , said IPS panel " black black does not go " , but also because of this reason that the official result .
C-PVA or MVA panel also has a very reliable color performance , this part of the IPS matched
After a variety of VA class before we tested ( including sharp black screen MVA and C-PVA) liquid crystal display products , you can see them and IPS panel , almost completely cover the sRGB color space , so even as a design drawing or photography repair film, which also can be well done.
And this idea is basically shopping guide them to better sell their products and instill consumer , with word of mouth among users COG LCD Module, it has almost become a "truth" , so here we are once again reminded us of two type of wide viewing angle panel each have different strengths and weaknesses , in the purchase or to take into account the actual needs .
low temperature lcd display
low temperature lcd display
2013年12月19日星期四
Response time of liquid crystal TFT Display Module
The so-called reaction time of each pixel LCD display of the input signal reaction speed, ie the pixels from dark to bright or dim light by the time needed ( the principle is the voltage applied to the liquid crystal molecules of the liquid crystal molecules twist and replies ) . Often say 25ms, 16ms is referring to the reaction time, the shorter the time to see if the user does not have a more dynamic picture shadow tail dragging feeling. The reaction time is generally divided into two parts: the rise time (Risetime) and fall time (Falltime), which means that when the sum of both prevail.
CRT monitors , as long as the electron beam hitting phosphor instantly luminous , while the residual glow very short time , so the traditional CRT monitors response time of only 1 ~ 3ms. Therefore, the reaction time in the CRT display is generally not been mentioned. And because the LCD display is the use of liquid crystal molecules twist control light off, while reversing the liquid crystal molecules is a process, so the response time is significantly longer than the liquid crystal display CRT.
25ms to 12ms from the early well-known 16ms then recently appeared , the reaction time is continuously shortened stereotypes are not suitable for liquid crystal displays and entertainment are being huge challenge. You can do a simple conversion : 30 ms = 1/0.030 = 33 per second display screen ; 25 ms = 1/0.025 = 40 per second display screen ;OLED Display 16 ms = 1/0.016 = 63 per display frames ; 12 ms = 1/0.012 = 83 per second display screen . As can be seen the birth of a great progress means 12ms LCD manufacture.
It should be noted that the LCD display has a scanning frequency of restrictions , especially for field frequency ( also known as refresh rate ) , many of which are limited to 75Hz or less , but in terms of general concepts , 75Hz refresh 75 means one second screen looks like this reach 12ms frames per second, corresponding to a 83 .
In fact , we said above, the 12ms response time is the time for switching between black and white screen required , this full white drive voltage required to switch the black screen is relatively high , it is more switching speed fast , up to 12ms; most of the practical applications of the switching gray screen ( LCD and its essence is not completely reversed , incomplete light transmission ) , the required driving voltage is relatively low , the switching speed is relatively slow. So together, in the gray screen refresh rate of 75Hz 12ms has to meet the needs of the Lcd display module .
According to the data showed that:
Reaction time = 30 ms = 1/0.030 per second display screen can display 33 , which is already able to meet the needs of DVD playback ;
Reaction time = 25 ms = 1/0.025 per second monitor can display 40 images, a DVD player and fully meet the needs of the majority of the game ;
While playing the kind of intense action game ( eg QUAKEIII/UT2003/DOMMIII), Speed Pursuit and other games to be achieved if there is no ghosting , the screen displays the desired reaction time at 60 frames per second, the speed should be more than that required = 1 / 60 frames per second display screen capable of displaying = 16.6 ms.
CRT monitors , as long as the electron beam hitting phosphor instantly luminous , while the residual glow very short time , so the traditional CRT monitors response time of only 1 ~ 3ms. Therefore, the reaction time in the CRT display is generally not been mentioned. And because the LCD display is the use of liquid crystal molecules twist control light off, while reversing the liquid crystal molecules is a process, so the response time is significantly longer than the liquid crystal display CRT.
25ms to 12ms from the early well-known 16ms then recently appeared , the reaction time is continuously shortened stereotypes are not suitable for liquid crystal displays and entertainment are being huge challenge. You can do a simple conversion : 30 ms = 1/0.030 = 33 per second display screen ; 25 ms = 1/0.025 = 40 per second display screen ;OLED Display 16 ms = 1/0.016 = 63 per display frames ; 12 ms = 1/0.012 = 83 per second display screen . As can be seen the birth of a great progress means 12ms LCD manufacture.
It should be noted that the LCD display has a scanning frequency of restrictions , especially for field frequency ( also known as refresh rate ) , many of which are limited to 75Hz or less , but in terms of general concepts , 75Hz refresh 75 means one second screen looks like this reach 12ms frames per second, corresponding to a 83 .
In fact , we said above, the 12ms response time is the time for switching between black and white screen required , this full white drive voltage required to switch the black screen is relatively high , it is more switching speed fast , up to 12ms; most of the practical applications of the switching gray screen ( LCD and its essence is not completely reversed , incomplete light transmission ) , the required driving voltage is relatively low , the switching speed is relatively slow. So together, in the gray screen refresh rate of 75Hz 12ms has to meet the needs of the Lcd display module .
According to the data showed that:
Reaction time = 30 ms = 1/0.030 per second display screen can display 33 , which is already able to meet the needs of DVD playback ;
Reaction time = 25 ms = 1/0.025 per second monitor can display 40 images, a DVD player and fully meet the needs of the majority of the game ;
While playing the kind of intense action game ( eg QUAKEIII/UT2003/DOMMIII), Speed Pursuit and other games to be achieved if there is no ghosting , the screen displays the desired reaction time at 60 frames per second, the speed should be more than that required = 1 / 60 frames per second display screen capable of displaying = 16.6 ms.
2013年12月5日星期四
Character LCD Modules screen features TFT-LCD research
As the technology matures early nineties TFT color LCD flat panel displays rapid development, less than 10 years, TFT-LCD screen display rapid growth of the mainstream, which has the advantage that it is inseparable. The main features are:
A wide scope
The temperature range from -20 ℃ to +50 ℃ can be used normally after TFT-LCD liquid crystal display cryogenic temperature reinforcement operating temperature can reach minus 80 ℃. Can be used as a mobile terminal display, desktop terminal display, and can be used for large-screen projection TV is an excellent performance of the full-size video display terminal.
Second, good use of properties
Low display range covers from 1-40 inches wide range of applications as well as all displays large projection plane, is a full-size display terminal; display quality from the most simple monochrome character graphics to high resolution, high color fidelity , high brightness, high contrast, high response speed of various models of video display; display has direct-projection type, see-through, but also reflective. Voltage applications, low driving voltage, solid use of improved security and reliability; flat-panel technology, but also light, save a lot of raw materials and the use of space; low power, its power consumption is about one-tenth of CRT monitors, reflection type TFT-LCD or CRT only about one percent, saving a lot of energy; TFT-LCD LCD screen products as well as specifications, dimensions serialization and varied, flexible and easy to use, maintenance, updates, upgrades easy to use long life and many other features.
Third, the high degree of automation of manufacturing technology
Large-scale industrial production characteristics of a good. TFT-LC D LCD technology is mature industry, large-scale production yield of over 90%.
Fourth, good environmental characteristics
No radiation, no flicker, no damage to the health of users. Particularly TFT-LCD electronic books appeared, will mankind into a paperless office, paperless printing era, triggered the revolution of human learning, communication and records civilized manner.
Five, TFT-LCD ease of integration and upgrading
There are amorphous, polycrystalline and monocrystalline silicon TFT-LCD LCD, TFT future there will be other materials, both glass substrates have a plastic substrate. Large-scale integrated circuit technology and semiconductor light source technology the perfect combination of great potential for continued development.
Developing fast, stable core technology
Manufacturing, advanced production technology, new materials development, large-scale production equipment, will drive the upstream industries. TFT-LCD module is the core component of the information industry, involving almost all the areas of communications, transportation, household appliances, computers, education, industrial, medical, defense and so on. TFT-LCD production line decades of industrialization experienced seven major development, an average of one and a half years of production line will be updated. However, the core technology of TFT-LCD is relatively stable. Wide-driven industries face, has global significance for the national economy: Raw materials, production equipment, production technology involves dozens of areas of modern industrial production.
On a large area of glass or plastic substrate manufacturing control cell (LC or OLED) switching performance than in silicon TFT greater technical difficulty scale manufacturing of IC. Requirements of the production environment (degree of purification of 100), the purity of raw materials requirements (electronic special gas purity 99.999985%), production equipment and production technology requirements are more than large-scale integrated semiconductor, is a modern large-scale production of the top technology. The technical characteristics of TFT TFT technology is developed in the 1990s, the use of new materials and new technology of large-scale semiconductor integrated circuit manufacturing technology the whole, is a liquid crystal (LC), inorganic and organic thin film electroluminescent (EL and OEL ) flat panel displays foundation. TFT is on a non-single-chip glass or plastic substrate (of course also be performed on the wafer) to form a variety of film manufacture circuits required by sputtering, chemical deposition process, through large-scale manufacture of film semiconductor integrated circuit (LSIC) . Use of non-single crystal substrate can greatly reduce the cost, is an extension of the traditional LSI to a large area, multi-purpose, low-cost direction. Its main features are:
A powerful
Now people began to drive IC integrated into the glass substrate, the entire TFT function more powerful, which is the traditional large-scale semiconductor integrated circuit unmatched. As the first site circuit matrix TFT liquid crystal light valve to improve the properties. For high-resolution displays, via 0-6V range of voltage regulator (the typical value of 0.2 to 4V), to achieve a precise control of the target element, so that the LCD screen to achieve high-quality high-resolution display possible. TFT-LCD is a human history over the CRT display quality in a flat panel display.
Second, a large area
The first generation of the early nineties large area glass substrates (300mm × 400mm) TFT-LCD LCD production line, the first half of 2000 has been expanded area glass substrates to 680mm × 880mm), which is expected to start in 2009 in Japan SHARP investing in Osaka 10 generation line glass substrate size reached 2880mmX3080mm, the size of the glass panels can be cut 15 42-inch lcd graphic display TV.
Third, the wide range of applications
With technology-based LCD TFT flat panel display industry is the backbone of the information society, and technology can be applied to the rapidly growing organic electroluminescent thin film transistor (TFT-OLED) flat panel displays are also rapidly growing.
Fourth, the process flexible
In addition to sputtering, other than the CVD (chemical vapor deposition) MCVD (molecular chemical vapor deposition) and other conventional deposition processes, have begun to use the laser annealing technique, can produce both an amorphous film, a polycrystalline film, single-crystal film can be manufactured. Not only can produce silicon film, you can also make other Ⅱ - Ⅵ family and Ⅲ - Ⅴ semiconductor film.
Five, low-cost
Glass substrate and a plastic substrate from the fundamental solution to the problem of the cost of large-scale semiconductor integrated circuit, semiconductor integrated circuits for large-scale applications to develop a broad application space.
Sixth, the high level of integration
For 1.3 inch TFT liquid crystal projector with a resolution of XGA chip containing one million pixels. Resolution of SXGA (1280 × 1024) of the thickness of the amorphous silicon TFT array is only 16.1 inches 50nm, and TABONGLASS and SYSTEMONGLASS technology, integration of the IC,TFT Display Module supply of the required equipment and technology, the technical difficulty is more than the traditional LSI.
A wide scope
The temperature range from -20 ℃ to +50 ℃ can be used normally after TFT-LCD liquid crystal display cryogenic temperature reinforcement operating temperature can reach minus 80 ℃. Can be used as a mobile terminal display, desktop terminal display, and can be used for large-screen projection TV is an excellent performance of the full-size video display terminal.
Second, good use of properties
Low display range covers from 1-40 inches wide range of applications as well as all displays large projection plane, is a full-size display terminal; display quality from the most simple monochrome character graphics to high resolution, high color fidelity , high brightness, high contrast, high response speed of various models of video display; display has direct-projection type, see-through, but also reflective. Voltage applications, low driving voltage, solid use of improved security and reliability; flat-panel technology, but also light, save a lot of raw materials and the use of space; low power, its power consumption is about one-tenth of CRT monitors, reflection type TFT-LCD or CRT only about one percent, saving a lot of energy; TFT-LCD LCD screen products as well as specifications, dimensions serialization and varied, flexible and easy to use, maintenance, updates, upgrades easy to use long life and many other features.
Third, the high degree of automation of manufacturing technology
Large-scale industrial production characteristics of a good. TFT-LC D LCD technology is mature industry, large-scale production yield of over 90%.
Fourth, good environmental characteristics
No radiation, no flicker, no damage to the health of users. Particularly TFT-LCD electronic books appeared, will mankind into a paperless office, paperless printing era, triggered the revolution of human learning, communication and records civilized manner.
Five, TFT-LCD ease of integration and upgrading
There are amorphous, polycrystalline and monocrystalline silicon TFT-LCD LCD, TFT future there will be other materials, both glass substrates have a plastic substrate. Large-scale integrated circuit technology and semiconductor light source technology the perfect combination of great potential for continued development.
Developing fast, stable core technology
Manufacturing, advanced production technology, new materials development, large-scale production equipment, will drive the upstream industries. TFT-LCD module is the core component of the information industry, involving almost all the areas of communications, transportation, household appliances, computers, education, industrial, medical, defense and so on. TFT-LCD production line decades of industrialization experienced seven major development, an average of one and a half years of production line will be updated. However, the core technology of TFT-LCD is relatively stable. Wide-driven industries face, has global significance for the national economy: Raw materials, production equipment, production technology involves dozens of areas of modern industrial production.
On a large area of glass or plastic substrate manufacturing control cell (LC or OLED) switching performance than in silicon TFT greater technical difficulty scale manufacturing of IC. Requirements of the production environment (degree of purification of 100), the purity of raw materials requirements (electronic special gas purity 99.999985%), production equipment and production technology requirements are more than large-scale integrated semiconductor, is a modern large-scale production of the top technology. The technical characteristics of TFT TFT technology is developed in the 1990s, the use of new materials and new technology of large-scale semiconductor integrated circuit manufacturing technology the whole, is a liquid crystal (LC), inorganic and organic thin film electroluminescent (EL and OEL ) flat panel displays foundation. TFT is on a non-single-chip glass or plastic substrate (of course also be performed on the wafer) to form a variety of film manufacture circuits required by sputtering, chemical deposition process, through large-scale manufacture of film semiconductor integrated circuit (LSIC) . Use of non-single crystal substrate can greatly reduce the cost, is an extension of the traditional LSI to a large area, multi-purpose, low-cost direction. Its main features are:
A powerful
Now people began to drive IC integrated into the glass substrate, the entire TFT function more powerful, which is the traditional large-scale semiconductor integrated circuit unmatched. As the first site circuit matrix TFT liquid crystal light valve to improve the properties. For high-resolution displays, via 0-6V range of voltage regulator (the typical value of 0.2 to 4V), to achieve a precise control of the target element, so that the LCD screen to achieve high-quality high-resolution display possible. TFT-LCD is a human history over the CRT display quality in a flat panel display.
Second, a large area
The first generation of the early nineties large area glass substrates (300mm × 400mm) TFT-LCD LCD production line, the first half of 2000 has been expanded area glass substrates to 680mm × 880mm), which is expected to start in 2009 in Japan SHARP investing in Osaka 10 generation line glass substrate size reached 2880mmX3080mm, the size of the glass panels can be cut 15 42-inch lcd graphic display TV.
Third, the wide range of applications
With technology-based LCD TFT flat panel display industry is the backbone of the information society, and technology can be applied to the rapidly growing organic electroluminescent thin film transistor (TFT-OLED) flat panel displays are also rapidly growing.
Fourth, the process flexible
In addition to sputtering, other than the CVD (chemical vapor deposition) MCVD (molecular chemical vapor deposition) and other conventional deposition processes, have begun to use the laser annealing technique, can produce both an amorphous film, a polycrystalline film, single-crystal film can be manufactured. Not only can produce silicon film, you can also make other Ⅱ - Ⅵ family and Ⅲ - Ⅴ semiconductor film.
Five, low-cost
Glass substrate and a plastic substrate from the fundamental solution to the problem of the cost of large-scale semiconductor integrated circuit, semiconductor integrated circuits for large-scale applications to develop a broad application space.
Sixth, the high level of integration
For 1.3 inch TFT liquid crystal projector with a resolution of XGA chip containing one million pixels. Resolution of SXGA (1280 × 1024) of the thickness of the amorphous silicon TFT array is only 16.1 inches 50nm, and TABONGLASS and SYSTEMONGLASS technology, integration of the IC,TFT Display Module supply of the required equipment and technology, the technical difficulty is more than the traditional LSI.
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