Number of colors , looks very simple , not that LCD TVs can display the number of colors you ? There will be no secret it, but still can not say that the secret ! But in the store, the number of colors they might have a second meaning . In addition to the number of colors the screen outside , businesses are more willing to emphasize the color chip number ( internal circuit can handle the number of colors ) .
LCD panel can show the number of colors , number of colors of the screen , the consumer can really see the final results . It depends on the screen to a screen driver IC can provide much of the liquid crystal molecules voltage levels : that is often said 6bit panel , 8bit and 10bit panel panel . Name suggests , 8bit panel driver IC is able to provide the liquid crystal molecules 8 -bit binary number of voltage, that is a power of 2, 8 , for the 256 level . So on the other . LCD TVs currently on the market mainstream products with 8bit drive ; Sony and some other brands of high-end products with 10bit drivers ; 6bit driven panel LCD TV has basically close eliminated. 8bit panel corresponds to the number of colors is 1.67M ( million ), 10bit panel corresponds to the number of colors is 1.07 billion colors.
The number of colors is the emphasis on the chip LCD television signal processing chip capable of handling the maximum number of colors . When an image signal is input when the internal TFT Display
Module TV , circuits, and these chips will process the signal transmission mode , such as digital to analog , analog to digital conversion , noise reduction, decoding , etc. , by these changes, the input television signal is converted into the screen displays the desired signal . Such a signal processing is usually one or more blocks by a processing chip is completed. The calculation of these chips or chip precision is the number of colors . Although the LCD screen is concentrated in 8bit level, but chips have appeared in large numbers 10bit, 12bit, 18bit and even products .
LCD TV screens are usually the number of colors and the number of colors to be quite the chip , otherwise there will be a bottleneck . In product design, the chip cost far less than the cost of the screen , so the upgrade is often first appear the color of the chip number . This brings to the business opportunity. Business through the concept of the number of colors to steal the chip into the usual number of colors , do not clearly indicate the number of colors in the end what is , in turn,2x16 lcd
display can give a greater value , thus attempting to deceive consumers .
In the actual purchase , the number of colors LCD TV screen is the ultimate reference standard. Because of advances in chip speed often exceeds the screen . The screen has a higher number of colors means better color , especially the color detail performance capabilities. Do not blindly be business value "Fudge " out .
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2013年10月29日星期二
TV common sense knowledge
● What is digital television receiving equipment ?
Digital television receiving equipment is capable of receiving and decoding digital television signals digital system terminal equipment referred to, also known as digital television receivers.OLED Module Existing digital television receiving apparatus has a digital television receiver ( commonly known as set-top boxes ) and digital TV coordinator two kinds.
Digital television receiver apparatus can work as a standalone device , the digital television may not act as a coordinator of the device to work independently , must be used in conjunction with other devices .
● What is digital TV display device ?
Digital TV display device is a digital television video signal for displaying a digital television system terminal equipment referred to, also known as the digital TV display .
Indeed television display device is commonly known as the home of the TV. TV according to the display principle be divided into different types , the type of TV technology is now the mainstream with a cathode ray (CRT) tube televisions , liquid crystal (LCD) televisions ,lcm module plasma (PDP) TV , an organic light emitting diode (OLED) TV machine and rear projection TV .
Wherein the cathode ray tube televisions and projection televisions are bulky type of TV , and LCD TV , plasma TV , an organic light-emitting diode TV is a smaller type of TV , also known as flat-panel televisions.
Digital television receiving equipment is capable of receiving and decoding digital television signals digital system terminal equipment referred to, also known as digital television receivers.OLED Module Existing digital television receiving apparatus has a digital television receiver ( commonly known as set-top boxes ) and digital TV coordinator two kinds.
Digital television receiver apparatus can work as a standalone device , the digital television may not act as a coordinator of the device to work independently , must be used in conjunction with other devices .
● What is digital TV display device ?
Digital TV display device is a digital television video signal for displaying a digital television system terminal equipment referred to, also known as the digital TV display .
Indeed television display device is commonly known as the home of the TV. TV according to the display principle be divided into different types , the type of TV technology is now the mainstream with a cathode ray (CRT) tube televisions , liquid crystal (LCD) televisions ,lcm module plasma (PDP) TV , an organic light emitting diode (OLED) TV machine and rear projection TV .
Wherein the cathode ray tube televisions and projection televisions are bulky type of TV , and LCD TV , plasma TV , an organic light-emitting diode TV is a smaller type of TV , also known as flat-panel televisions.
2013年10月27日星期日
Type liquid crystal panel
1, TN panel
TN full name TwistedNematic ( twisted nematic ) panels, low production costs make TN has become the most widely used entry-level LCD panel, the current mainstream market low-end LCD monitors are widely used . Currently we see mostly improved TN panel type TN + film, film that compensation film , used to compensate for the lack of viewing angle TN panel , the current improved viewing angle of TN panels have reached 160 °, of course, this is vendor in the case of a 10:1 contrast ratio measured limit , in fact down to 100:1 contrast image has distortion or cast . As 6Bit panels , TN panels can only display red / green / blue color of 64 , the maximum actual colors only 262.144 kinds , through the " jitter " technology can enable them to make more than 16 million kinds of color performance capabilities, only to be able to display 0 252 grayscale primary colors , so the final number of the resulting information is 16.2M color display color , rather than what we usually refer to the true color 16.7M colors ; coupled with TN panel to increase the contrast of the more difficult, the problem is directly exposed color thin, reducing ability, the transition is not natural. TN panels advantage is less due to the output grayscale series of liquid crystal molecules deflection fast, easy to improve the response time on the market today 8ms LCD products the following basic uses a TN panel . Another Samsung also developed a B-TN (Best-TN) panel , it is actually an improved TN panel , mainly in order to balance the high-speed response TN panel must sacrifice quality of contradictions. While the contrast up to 700:1 , they can already and MVA or PVA panel early phase close. Many Taiwanese panel manufacturers TN panels , TN panels are soft screen , gently draw will appear similar to the waterlines , another careful look at the screen roughly like this :
2, VA Class panel
VA class high-end lcm module are now used more type of panel , belonging wide viewing angle panel . And compared to TN panels , 8bit panel can provide 16.7M colors and large viewing angles are targeting high-end class panel of the capital, but the price is relatively more expensive some of the TN panel . VA panel can be divided into classes led by Fujitsu MVA panel and developed by Samsung PVA panel , where the latter is a continuation and improvement . VA class front of the panel ( front ) highest contrast , but the screen is not good enough uniformity , color drift tends to occur . Sharp text is its trump card , black and white contrast is quite high. Fujitsu MVA technology (Multi-domainVerticalAlignment, multi-quadrant vertical alignment technology ) can be said is the earliest wide viewing angle LCD panel technology . Such panels can provide greater viewing angles , typically up to 170 °. Through technology licensing , Taiwan Province of China CMO ( Chi Mei Optoelectronics ) , AU Optronics panel companies have adopted this panel technology . Improved class of P-MVA panel nearly horizontal viewing angle of up to 178 °, and 8ms gray response time can reach the following Samsung Samsung Electronics PVA (PatternedVerticalAlignment) technology also belong to the scope of VA technology , which is the successor MVA technology and the developer . Its overall quality has been fully than the latter , and improved the S-PVA and P-MVA can already go hand in hand , to get a very wide viewing angle and faster response time. PVA instead of using the transparent ITO electrode MVA projection of the liquid crystal layer , the transparent electrode can get a better opening rate , to minimize the waste of backlight . This model greatly reduces the Character LCD Modules a " bright spot" of the possibility of the status of the LCD TV era equivalent CRT TV era of the " Long Guan ." Samsung's main push of the PVA mode wide viewing angle technology , due to its strong capacity and stable quality control system, widely used by Japanese and U.S. manufacturers .
TN full name TwistedNematic ( twisted nematic ) panels, low production costs make TN has become the most widely used entry-level LCD panel, the current mainstream market low-end LCD monitors are widely used . Currently we see mostly improved TN panel type TN + film, film that compensation film , used to compensate for the lack of viewing angle TN panel , the current improved viewing angle of TN panels have reached 160 °, of course, this is vendor in the case of a 10:1 contrast ratio measured limit , in fact down to 100:1 contrast image has distortion or cast . As 6Bit panels , TN panels can only display red / green / blue color of 64 , the maximum actual colors only 262.144 kinds , through the " jitter " technology can enable them to make more than 16 million kinds of color performance capabilities, only to be able to display 0 252 grayscale primary colors , so the final number of the resulting information is 16.2M color display color , rather than what we usually refer to the true color 16.7M colors ; coupled with TN panel to increase the contrast of the more difficult, the problem is directly exposed color thin, reducing ability, the transition is not natural. TN panels advantage is less due to the output grayscale series of liquid crystal molecules deflection fast, easy to improve the response time on the market today 8ms LCD products the following basic uses a TN panel . Another Samsung also developed a B-TN (Best-TN) panel , it is actually an improved TN panel , mainly in order to balance the high-speed response TN panel must sacrifice quality of contradictions. While the contrast up to 700:1 , they can already and MVA or PVA panel early phase close. Many Taiwanese panel manufacturers TN panels , TN panels are soft screen , gently draw will appear similar to the waterlines , another careful look at the screen roughly like this :
2, VA Class panel
VA class high-end lcm module are now used more type of panel , belonging wide viewing angle panel . And compared to TN panels , 8bit panel can provide 16.7M colors and large viewing angles are targeting high-end class panel of the capital, but the price is relatively more expensive some of the TN panel . VA panel can be divided into classes led by Fujitsu MVA panel and developed by Samsung PVA panel , where the latter is a continuation and improvement . VA class front of the panel ( front ) highest contrast , but the screen is not good enough uniformity , color drift tends to occur . Sharp text is its trump card , black and white contrast is quite high. Fujitsu MVA technology (Multi-domainVerticalAlignment, multi-quadrant vertical alignment technology ) can be said is the earliest wide viewing angle LCD panel technology . Such panels can provide greater viewing angles , typically up to 170 °. Through technology licensing , Taiwan Province of China CMO ( Chi Mei Optoelectronics ) , AU Optronics panel companies have adopted this panel technology . Improved class of P-MVA panel nearly horizontal viewing angle of up to 178 °, and 8ms gray response time can reach the following Samsung Samsung Electronics PVA (PatternedVerticalAlignment) technology also belong to the scope of VA technology , which is the successor MVA technology and the developer . Its overall quality has been fully than the latter , and improved the S-PVA and P-MVA can already go hand in hand , to get a very wide viewing angle and faster response time. PVA instead of using the transparent ITO electrode MVA projection of the liquid crystal layer , the transparent electrode can get a better opening rate , to minimize the waste of backlight . This model greatly reduces the Character LCD Modules a " bright spot" of the possibility of the status of the LCD TV era equivalent CRT TV era of the " Long Guan ." Samsung's main push of the PVA mode wide viewing angle technology , due to its strong capacity and stable quality control system, widely used by Japanese and U.S. manufacturers .
What is a liquid crystal (LCD) TV
LCD TV , also known as LCD TV (liquidcrystaldisplay), is the use of the characteristics of the optical anisotropy of the liquid crystal , the electric field on the outside light modulation to achieve an information display display technology , the use of color filters , lcd module color display is easy to implement .
LCD as a display medium , with its display technology continues to improve , and its increasingly widespread application in computers, digital cameras, digital cameras, mobile phones, portable TVs, game consoles and monitors , and other rapidly developing field . Since the late 20th century the LCD technology is not mature , there is a narrow viewing angle , contrast is low , the screen resolution is poor, small size , price disadvantages , so LCD TV did not really get with the development of LCD TV just stay in 14in , 15in and other small size . Into the 21st century with the LCD technology continues to improve and mature , and more attention and investment firm , LCD TV quickly overcome its technical shortcomings and flourished. Now the size of the largest LCD TV can do more than 100in , has overcome the size limitations ,OLED Display but the mainstream size (32,37,40,42,47 in) TV prices have been accepted by the people , the real advent of the era of LCD TVs the .
LCD as a display medium , with its display technology continues to improve , and its increasingly widespread application in computers, digital cameras, digital cameras, mobile phones, portable TVs, game consoles and monitors , and other rapidly developing field . Since the late 20th century the LCD technology is not mature , there is a narrow viewing angle , contrast is low , the screen resolution is poor, small size , price disadvantages , so LCD TV did not really get with the development of LCD TV just stay in 14in , 15in and other small size . Into the 21st century with the LCD technology continues to improve and mature , and more attention and investment firm , LCD TV quickly overcome its technical shortcomings and flourished. Now the size of the largest LCD TV can do more than 100in , has overcome the size limitations ,OLED Display but the mainstream size (32,37,40,42,47 in) TV prices have been accepted by the people , the real advent of the era of LCD TVs the .
2013年10月25日星期五
TN Encyclopedia wide viewing angle
In 2009 TN panel LCD rapid development, but because of too rapid development and pursuit of the shortcomings exposed by also attracted the attention of consumers . TN panel LCD color gamut is limited, narrow viewing angle , while the backlight is not ideal , and many other issues experiencing severe test of the market and consumers . Coupled with the expansion of product lines too fast , and manufacturers in order to seize the time to market similar products and innovative enough to ignore the phenomenon , so many consumers lose confidence in such products .
Wide viewing angle is due to lcd module viewing angle is small, a large angle to the side when viewing the screen will be pale, contrast and color performance is also poor , so the plant was developed by a panel of a technology. Wide viewing angle technology department only related to the display 's viewing angle , but also affect the monitor's response time and brightness and other parameters. So adding wide viewing angle panel display has also been awarded the title of high-end products .
LCD panel changes concern most consumers , this change also allow consumers to experience high-end technology to the LCD display strong incoming civilian attitudes . But with the growing number of types of LCD panels , each vendor near perfect qualifier for consumers in the purchase of intangible opportunities, what is the difference of these LCD panels ,OLED Module you know how much more they ? Today we have for you to spread knowledge about the type of panel .
Wide viewing angle is due to lcd module viewing angle is small, a large angle to the side when viewing the screen will be pale, contrast and color performance is also poor , so the plant was developed by a panel of a technology. Wide viewing angle technology department only related to the display 's viewing angle , but also affect the monitor's response time and brightness and other parameters. So adding wide viewing angle panel display has also been awarded the title of high-end products .
LCD panel changes concern most consumers , this change also allow consumers to experience high-end technology to the LCD display strong incoming civilian attitudes . But with the growing number of types of LCD panels , each vendor near perfect qualifier for consumers in the purchase of intangible opportunities, what is the difference of these LCD panels ,OLED Module you know how much more they ? Today we have for you to spread knowledge about the type of panel .
Uncover the history of the three major fallacy LCD TV
About 10 years ago , LCD TVs began to emerge, smaller size and larger display area means that the traditional CRT LCD TVs will be replaced , then the terminal market has long been predicted candidates , LCD TV to replace the CRT tube TVs even faster exceed industry expectations, followed by the traditional CCFL LCD TV backlighting is also the transition to LED backlighting , followed by another 3D TV and the emergence of smart TVs , LCD TVs can be said that the entire development process is very fast .
● One fallacy : LCD TVs more energy efficient compared to CRT TV
See this title , it is inevitable that some readers feel weird, do not worry, then I will explain in detail . Recalling the beginning of LCD TVs coming time, that is the early development of LCD TV , LCD TV manufacturers to strongly assert more power than television CRT tube , which is an instant success and even irresponsible.
LCD technology is mainly used in LCD monitors and LCD TVs , and in the early development of LCD technology , LCD compared to CRT monitors indeed the same size to be more energy efficient , while compared to the same size LCD TV CRT TV but did not dominant, there are even more costly electricity is suspect. Also LCD technology , why does this happen ?
● The second fallacy : Dynamic Contrast quality is more
LCD technology development at the beginning of the consumer from the parameters of the liquid crystal panel LCD products will be able to read the approximate performance of a panel attributes (TN, MVA, PVA, IPS , etc. ) , brightness , response time , contrast , viewing angle etc., and even experienced users can identify a little MVP, PVA, IPS LCD panel strengths and weaknesses, then LCD is really a very simple areas of the world . Until the emergence of dynamic contrast , the original field of liquid crystal pure world has changed ...... become dirty .
Injustice has a head debt of the Lord , the dynamic contrast ratio is brought into the field of liquid crystal Korean manufacturers , OLED Module was the best LCD panel contrast ratio of 1000:1 , and dynamic contrast appears, even a TN panel can also easily over 1000 : 1 dynamic contrast ratio from the outset quite converge to 1500:1 start, followed by endless 2000:1,3000:1,5000:1,8000:1,10000:1,50000:1,100000:1 All LCD manufacturers are exaggerated than the data , until the ultimate consumer unbearable, lcd module manufacturers seems to have realized the seriousness of the situation , the dynamic contrast ratio only gradually fade from view .
● The third fallacy : the new LED backlight technology is stronger than traditional CCFL backlight picture
A naughty little boy to grow into mature man , take some time and process . For a new technology , in fact, is the same reason , back in 2009 or so , the new LED backlight technology just around the corner , much to replace the traditional CCFL backlight technology momentum , TV LED TV manufacturers in order to squeeze more profits, blind LED backlight technology for landscaping , most can not tolerate is : LED backlight technology quality performance better than traditional CCFL backlight .
● One fallacy : LCD TVs more energy efficient compared to CRT TV
See this title , it is inevitable that some readers feel weird, do not worry, then I will explain in detail . Recalling the beginning of LCD TVs coming time, that is the early development of LCD TV , LCD TV manufacturers to strongly assert more power than television CRT tube , which is an instant success and even irresponsible.
LCD technology is mainly used in LCD monitors and LCD TVs , and in the early development of LCD technology , LCD compared to CRT monitors indeed the same size to be more energy efficient , while compared to the same size LCD TV CRT TV but did not dominant, there are even more costly electricity is suspect. Also LCD technology , why does this happen ?
● The second fallacy : Dynamic Contrast quality is more
LCD technology development at the beginning of the consumer from the parameters of the liquid crystal panel LCD products will be able to read the approximate performance of a panel attributes (TN, MVA, PVA, IPS , etc. ) , brightness , response time , contrast , viewing angle etc., and even experienced users can identify a little MVP, PVA, IPS LCD panel strengths and weaknesses, then LCD is really a very simple areas of the world . Until the emergence of dynamic contrast , the original field of liquid crystal pure world has changed ...... become dirty .
Injustice has a head debt of the Lord , the dynamic contrast ratio is brought into the field of liquid crystal Korean manufacturers , OLED Module was the best LCD panel contrast ratio of 1000:1 , and dynamic contrast appears, even a TN panel can also easily over 1000 : 1 dynamic contrast ratio from the outset quite converge to 1500:1 start, followed by endless 2000:1,3000:1,5000:1,8000:1,10000:1,50000:1,100000:1 All LCD manufacturers are exaggerated than the data , until the ultimate consumer unbearable, lcd module manufacturers seems to have realized the seriousness of the situation , the dynamic contrast ratio only gradually fade from view .
● The third fallacy : the new LED backlight technology is stronger than traditional CCFL backlight picture
A naughty little boy to grow into mature man , take some time and process . For a new technology , in fact, is the same reason , back in 2009 or so , the new LED backlight technology just around the corner , much to replace the traditional CCFL backlight technology momentum , TV LED TV manufacturers in order to squeeze more profits, blind LED backlight technology for landscaping , most can not tolerate is : LED backlight technology quality performance better than traditional CCFL backlight .
2013年10月24日星期四
What makes a good flat-panel TVs
With the continuous development of the TV , it looks and has has been changed . TV from a big box transformed into a chunky tall, thin guy now . Not only look endearing , and its connotation ( application functions ) also improved, to the user who brought many surprises .
When consumers buy TV time , the choice of brand name products better.
Housing size :graphic lcd display module Optional TV when we can housing size , population size , economic conditions and other factors to select the TV . Determines the size of the TV housing sizes , such as 16 to 20 square meters room , choose 32 inches to 39 -inch TV will be able to achieve the best visual effects, 20 to 30 square meters room , choose 39 inches to 47 inches TV on the line .
The ideal distance to watch a TV 3 times the TV screen , 42-inch television can be seen that the optimum viewing distance of 2 to 2.5 m; 50-inch television optimum viewing distance of 2.3 to 3 m; 60 inches TV best viewing distance of 2.7 to 3.6 m .
Service: pick service , mainly to see the LCD screen warranty. Under normal circumstances, manufacturers are providing the machine ? Some parts warranty does not contain or alternatively a short time, other parts of the three-year free warranty service. So , to remind consumers Repairs must ask more questions , oh.
Resolution: For LCD TV , the resolution is an important parameter . LCD TV resolution (resolution) is about the panel displays an important indicator of image formats .serial display modules Typically we are referring to the physical resolution refers to the resolution of the panel , the screen displays the number of points , the horizontal and vertical pixel values , this value determines the resolution of the LCD screen , it is also very important.
When consumers buy TV time , the choice of brand name products better.
Housing size :graphic lcd display module Optional TV when we can housing size , population size , economic conditions and other factors to select the TV . Determines the size of the TV housing sizes , such as 16 to 20 square meters room , choose 32 inches to 39 -inch TV will be able to achieve the best visual effects, 20 to 30 square meters room , choose 39 inches to 47 inches TV on the line .
The ideal distance to watch a TV 3 times the TV screen , 42-inch television can be seen that the optimum viewing distance of 2 to 2.5 m; 50-inch television optimum viewing distance of 2.3 to 3 m; 60 inches TV best viewing distance of 2.7 to 3.6 m .
Service: pick service , mainly to see the LCD screen warranty. Under normal circumstances, manufacturers are providing the machine ? Some parts warranty does not contain or alternatively a short time, other parts of the three-year free warranty service. So , to remind consumers Repairs must ask more questions , oh.
Resolution: For LCD TV , the resolution is an important parameter . LCD TV resolution (resolution) is about the panel displays an important indicator of image formats .serial display modules Typically we are referring to the physical resolution refers to the resolution of the panel , the screen displays the number of points , the horizontal and vertical pixel values , this value determines the resolution of the LCD screen , it is also very important.
WIDI Technical Analysis
WiDi (IntelWirelessDisplay) all known wireless HD technology, which is to realize computer via WiFi signal and display device's wireless connection. Capella mobile platform Intel released after , WiDi technology has been able to apply the relevant products.
In the IT field , support for wireless transmission equipment is very large, such as wireless mouse and keyboard ,lcd module wireless card, wireless headsets , etc. This is also reflected in the other hand, consumer demand for wireless devices is very large . For laptop users, simply equipped with Intel CentrinoAdvanced-N6200/6300/1000 wireless card will be able to receive through the wireless adapter and a display device for wireless connection.
The realization principle WiDi laptop wireless card issued by the first radio signal , and the television terminal will be a radio receiving apparatus to receive the WiFi signal , the wireless reception device via HDMI or A / V cable to connect the signal to the display device.
Wireless Display is widely used , for example, in the conference room for PPT presentation, users no longer have to be disposed of complex video cables to worry about . OLED Display Module For home users, even if the user of the computer in the bedroom , he could LCD TV in the living room to enjoy high-definition video .
In the IT field , support for wireless transmission equipment is very large, such as wireless mouse and keyboard ,lcd module wireless card, wireless headsets , etc. This is also reflected in the other hand, consumer demand for wireless devices is very large . For laptop users, simply equipped with Intel CentrinoAdvanced-N6200/6300/1000 wireless card will be able to receive through the wireless adapter and a display device for wireless connection.
The realization principle WiDi laptop wireless card issued by the first radio signal , and the television terminal will be a radio receiving apparatus to receive the WiFi signal , the wireless reception device via HDMI or A / V cable to connect the signal to the display device.
Wireless Display is widely used , for example, in the conference room for PPT presentation, users no longer have to be disposed of complex video cables to worry about . OLED Display Module For home users, even if the user of the computer in the bedroom , he could LCD TV in the living room to enjoy high-definition video .
2013年10月23日星期三
The use of multi-touch
If you used the iphone,Character LCD
Modules will know that multi-touch is a very useful a lot of fun things: visit the website frequently to zoom in on a part of the region in order to see, to see pictures also very useful. Of course, do not have this function, the human is the same to adapt and to achieve their own ends, just as there is no touch-enabled mobile phone, like the Internet or still, of course, ease and comfort is not the same. This meat and vegetables can have enough food to eat the same reason.
Many people think that only multi-touch zoom function. In fact, the only multi-touch zoom and practical application of one sample. With multi-touch technology, how it can be applied to an infinite imagination infinite expansion. The programmer can be applied to the multi-touch many aspects, to some extent, change or innovation out more ways to operate. Typical applications are in reality playing on hard glass. If you put your phone screen into a key, then coax the little girl is still very interesting. Another typical example is Apple PS emulator on the phone, Serial Lcd Display Module through the multi-touch technology, to achieve the simultaneous directional keys and other buttons combined input.
Many people think that only multi-touch zoom function. In fact, the only multi-touch zoom and practical application of one sample. With multi-touch technology, how it can be applied to an infinite imagination infinite expansion. The programmer can be applied to the multi-touch many aspects, to some extent, change or innovation out more ways to operate. Typical applications are in reality playing on hard glass. If you put your phone screen into a key, then coax the little girl is still very interesting. Another typical example is Apple PS emulator on the phone, Serial Lcd Display Module through the multi-touch technology, to achieve the simultaneous directional keys and other buttons combined input.
LCD TV maintains a coup
Golden Week, color TV sales are booming, many consumers are taking advantage of the opportunities of business promotion and moved back a both stylish and affordable flat-panel TVs, but the face of a new TV, how to use maintenance also allows many consumers worry incessantly. In this regard, the experts pointed out that the maintenance of LCD TVs have the skills, do the following aspects of work is very necessary.
1 Do not sound too close, it is best to keep more than half a meter, because the sound has magnets, magnetic tape to be away from all things, to reduce TV interference.
2 Do not put other communications equipment placed next to the TV, LCD TV itself is by receiving a signal of the display, if long-term signal interference from outside, the TV picture quality will be reduced, there will be serious snow phenomenon.
3 Avoid long standby, lcd module TV in standby mode, some parts are still working, if you encounter thunder, lightning, is likely to cause harm on TV. Therefore, do not use the TV when it is best to unplug the power plug.
4 LCD screen is not too much scrubbing with water, do not use coarse fibers, cloth, or a long time be the color and appearance of the LCD screen damage, it is best to use a professional LCD cleaning solution and wipe gently.
5 a day for half an hour or so best to start with, so keep dry inside the TV, so you can increase the useful life of the TV.
6 LCD TV from the humidifier not too close, to avoid prolonged vapor erosion impact on the color LCD screen.
7 when not in use, turn off the power, or reduce the display brightness when used, can extend the useful life of the TV.
8 Avoid blunt hard object collision or LCD screen, because the LCD screen itself is fragile.
9 TV placement to be dark, dust, not on television in the usual case, it is best to use television hood cover up the TV, but the TV in use must cover removed, the TV can be a very good heat dissipation .
10 LCD TV is a national three products, if failure to timely contact with the manufacturers, the manufacturers of professional sales personnel on-site inspection and maintenance, OLED Display Module do not disassemble, in order to avoid improper removal causing further damage to the TV.
1 Do not sound too close, it is best to keep more than half a meter, because the sound has magnets, magnetic tape to be away from all things, to reduce TV interference.
2 Do not put other communications equipment placed next to the TV, LCD TV itself is by receiving a signal of the display, if long-term signal interference from outside, the TV picture quality will be reduced, there will be serious snow phenomenon.
3 Avoid long standby, lcd module TV in standby mode, some parts are still working, if you encounter thunder, lightning, is likely to cause harm on TV. Therefore, do not use the TV when it is best to unplug the power plug.
4 LCD screen is not too much scrubbing with water, do not use coarse fibers, cloth, or a long time be the color and appearance of the LCD screen damage, it is best to use a professional LCD cleaning solution and wipe gently.
5 a day for half an hour or so best to start with, so keep dry inside the TV, so you can increase the useful life of the TV.
6 LCD TV from the humidifier not too close, to avoid prolonged vapor erosion impact on the color LCD screen.
7 when not in use, turn off the power, or reduce the display brightness when used, can extend the useful life of the TV.
8 Avoid blunt hard object collision or LCD screen, because the LCD screen itself is fragile.
9 TV placement to be dark, dust, not on television in the usual case, it is best to use television hood cover up the TV, but the TV in use must cover removed, the TV can be a very good heat dissipation .
10 LCD TV is a national three products, if failure to timely contact with the manufacturers, the manufacturers of professional sales personnel on-site inspection and maintenance, OLED Display Module do not disassemble, in order to avoid improper removal causing further damage to the TV.
2013年10月22日星期二
Large-screen mosaic wall Maintenance
Due to the large screen display wall is 24 hours × 7 days of continuous constant use , improper use will directly affect their life and performance. Mosaic wall in the long process of lowering the brightness will appear , color fades and so on. Therefore, the user can make in the course of a few simple and convenient maintenance to prolong life, to ensure its performance.
Brightness becomes low ,lcd graphic display the main reason is the large-screen mosaic wall internal light source has exceeded its service life, cause the screen brightness is not enough , and the dust and oil may also affect its brightness. When the brightness is reduced , the image will follow the color fades . DLP 's internal lamp life is 5000 hours , If you exceed this limit , the brightness is reduced, usually considered bulb failure , you need to replace the lamp. Therefore , in addition to replacing the lamp , but in the course of daily use should be taken to ensure the cleanliness of the environment , minimize dust, oil , etc. into the big screen, the screen can also be used special cleaning fluid , regular cleaning of the screen , in order to ensure its colorful , clear image .
The indoor temperature should also keep in mind , we recommend that the temperature at 25 ° 26 ° between the indoor air-conditioning , fully guaranteed mosaic wall temperature . Its associated maintenance as follows:
1, the optical device is inserted into a large screen and easy ventilated environment, improve large-screen optical equipment lamp life.
2 , on a regular basis on the big screen cleaning optical equipment to do a comprehensive , large-screen display system can improve the brightness and contrast ( increased by 10 % to 30% ) .
3 , when the temperature is low , it will affect a large outdoor screen in normal use, generally lower than minus 30 degrees Celsius , it is recommended temporarily discontinue use. Of course, other measures such as the installation of air conditioning in the cabinets ,SPI oled etc., can also be guaranteed.
4 , pay attention to routine optical components ( color wheel , LCD panels, polarizers, lenses , etc. ) maintenance , to prevent premature aging .
5, if a serious fault videowall , please contact the manufacturer or professional service providers.
Brightness becomes low ,lcd graphic display the main reason is the large-screen mosaic wall internal light source has exceeded its service life, cause the screen brightness is not enough , and the dust and oil may also affect its brightness. When the brightness is reduced , the image will follow the color fades . DLP 's internal lamp life is 5000 hours , If you exceed this limit , the brightness is reduced, usually considered bulb failure , you need to replace the lamp. Therefore , in addition to replacing the lamp , but in the course of daily use should be taken to ensure the cleanliness of the environment , minimize dust, oil , etc. into the big screen, the screen can also be used special cleaning fluid , regular cleaning of the screen , in order to ensure its colorful , clear image .
The indoor temperature should also keep in mind , we recommend that the temperature at 25 ° 26 ° between the indoor air-conditioning , fully guaranteed mosaic wall temperature . Its associated maintenance as follows:
1, the optical device is inserted into a large screen and easy ventilated environment, improve large-screen optical equipment lamp life.
2 , on a regular basis on the big screen cleaning optical equipment to do a comprehensive , large-screen display system can improve the brightness and contrast ( increased by 10 % to 30% ) .
3 , when the temperature is low , it will affect a large outdoor screen in normal use, generally lower than minus 30 degrees Celsius , it is recommended temporarily discontinue use. Of course, other measures such as the installation of air conditioning in the cabinets ,SPI oled etc., can also be guaranteed.
4 , pay attention to routine optical components ( color wheel , LCD panels, polarizers, lenses , etc. ) maintenance , to prevent premature aging .
5, if a serious fault videowall , please contact the manufacturer or professional service providers.
LCD splicing image processing apparatus
Commonly used video equipment including video splitter, video extenders, video matrix switcher , multi-screen video signal processors, video signal converter that several major equipment.
Video distributor, is mainly used to copy the source video output signal into multiple outputs ; major application type is a sub- sub 4,1 8,1 3,1 16 four specifications . RCA and BNC interfaces form is divided into two kinds.
Video Signal Extender is mainly used for video signal attenuation additions, indoor video signal transmission distance up to 100 meters, the need to configure signal amplifier, over 100 meters using signal extender ;
Video Matrix Switcher , mainly used for multi-channel video signal input and output channel switching , lcd module to achieve a number of entry for more options . Divided into RCA and BNC interfaces.
Multi-screen video signal processor , mainly for multi-channel input signal displayed on the screen at one occasion , common specifications for the 4-screen , six screens , 9 screens , 13 screens , 16 screens five formats .
Video signal converter main function is to convert the video signal output VGA signal into a computer .
Computer signal processing equipment mainly includes VGA signal splitter, VGA Extender , VGA matrix switcher or RGB matrix switcher.
VGA signal splitter is used to copy the output port of a computer into multiple VGA output , common specifications for 1 min 2,1 4,1 8,1 16 minutes of four.
VGA signal extenders, mainly for long distance transmission of computer signals with twisted pair and fiber optic transmission in two ways, using twisted pair within 200 meters and 200 meters above must be using optical fiber transmission.
VGA or RGB matrix switcher for computer signals are multiplexed input and output channel selection, an entry into the right for more or more , which could be exchanged . VGA Matrix Switcher VGA interface common to use a computer , RGB matrix switcher is a computer signal into red, green , blue, line frequency , field frequency of five independent channels , the transmission signal stability , distance farther than VGA , commonly 5BNC interface.
Multi-screen display controllers :
Mainly used for video , computer , network signal mixed display . Remote network access management , image display , it can display the entire screen , window display roaming , single-screen multi-screen display .
Multi-screen controller can access up to 32 channels of video input ( plus expansion chassis can access even more ) , OLED Display the conventional 4-way VGA input, 2-way network input and output cables you can use VGA or DVI, and the number of output channels same number of screens .
With DLP rear projection , PDP plasma wall with mosaic DID LCD splicing increasingly intense competition , the advantages of large-screen LCD is gradually being recognized more industries and areas , as most of the customer's choice .
Video distributor, is mainly used to copy the source video output signal into multiple outputs ; major application type is a sub- sub 4,1 8,1 3,1 16 four specifications . RCA and BNC interfaces form is divided into two kinds.
Video Signal Extender is mainly used for video signal attenuation additions, indoor video signal transmission distance up to 100 meters, the need to configure signal amplifier, over 100 meters using signal extender ;
Video Matrix Switcher , mainly used for multi-channel video signal input and output channel switching , lcd module to achieve a number of entry for more options . Divided into RCA and BNC interfaces.
Multi-screen video signal processor , mainly for multi-channel input signal displayed on the screen at one occasion , common specifications for the 4-screen , six screens , 9 screens , 13 screens , 16 screens five formats .
Video signal converter main function is to convert the video signal output VGA signal into a computer .
Computer signal processing equipment mainly includes VGA signal splitter, VGA Extender , VGA matrix switcher or RGB matrix switcher.
VGA signal splitter is used to copy the output port of a computer into multiple VGA output , common specifications for 1 min 2,1 4,1 8,1 16 minutes of four.
VGA signal extenders, mainly for long distance transmission of computer signals with twisted pair and fiber optic transmission in two ways, using twisted pair within 200 meters and 200 meters above must be using optical fiber transmission.
VGA or RGB matrix switcher for computer signals are multiplexed input and output channel selection, an entry into the right for more or more , which could be exchanged . VGA Matrix Switcher VGA interface common to use a computer , RGB matrix switcher is a computer signal into red, green , blue, line frequency , field frequency of five independent channels , the transmission signal stability , distance farther than VGA , commonly 5BNC interface.
Multi-screen display controllers :
Mainly used for video , computer , network signal mixed display . Remote network access management , image display , it can display the entire screen , window display roaming , single-screen multi-screen display .
Multi-screen controller can access up to 32 channels of video input ( plus expansion chassis can access even more ) , OLED Display the conventional 4-way VGA input, 2-way network input and output cables you can use VGA or DVI, and the number of output channels same number of screens .
With DLP rear projection , PDP plasma wall with mosaic DID LCD splicing increasingly intense competition , the advantages of large-screen LCD is gradually being recognized more industries and areas , as most of the customer's choice .
2013年10月9日星期三
In the coal industry the big screen display function then fight the system to achieve
Full-screen , high-resolution applications
As a unified whole wall can be a logical screen to display high-resolution image screen , full screen display and resolution overlay, such as ultra-high resolution display system diagram , words of welcome and so on OLED Display Module.
Multi-channel video signal display
Supports all standard video input signals , video surveillance information , cameras, video recorders , the size of DVD players, projectors and other types of physical color video signal source can access general multi -screen processor , the signal processed by the general picture , as a window anywhere in the projection display wall to zoom, move across the screen, and so on .
Network signal display
Through the network connection , the signal display more flexible and convenient, the image on a network computer anywhere on the big screen , quickly display any proportion ; various unlimited number of computer workstations , future expansion will be on the wall just a computer -linked display to the network can be.
RGB, the video signal through display
Through enlarged. This image processing card configuration display unit supports fully lossless display 1080p, 1080i, 720p , and other high-definition video signal formats , you can directly enter playback HDTV, EVD, HD-DVD, HD DVR , and other high -definition video signal. Í2, 2ÍN way ( ie 2Í adoption and use of a display unit configured Visionlink super signal processing board can be multi-channel RGB, video signals , in full-screen mode within a single screen or full screen display.
Mixed display various types of signal
Universal multi-screen processor capable of handling ultra-high resolution graphics computer network splicing signals,lcd module video signals and RGB signals and different types of cross-screen display signal superimposed display function, either way the signal window can be arbitrarily reduced, enlarged , cross-screen or full screen.
As a unified whole wall can be a logical screen to display high-resolution image screen , full screen display and resolution overlay, such as ultra-high resolution display system diagram , words of welcome and so on OLED Display Module.
Multi-channel video signal display
Supports all standard video input signals , video surveillance information , cameras, video recorders , the size of DVD players, projectors and other types of physical color video signal source can access general multi -screen processor , the signal processed by the general picture , as a window anywhere in the projection display wall to zoom, move across the screen, and so on .
Network signal display
Through the network connection , the signal display more flexible and convenient, the image on a network computer anywhere on the big screen , quickly display any proportion ; various unlimited number of computer workstations , future expansion will be on the wall just a computer -linked display to the network can be.
RGB, the video signal through display
Through enlarged. This image processing card configuration display unit supports fully lossless display 1080p, 1080i, 720p , and other high-definition video signal formats , you can directly enter playback HDTV, EVD, HD-DVD, HD DVR , and other high -definition video signal. Í2, 2ÍN way ( ie 2Í adoption and use of a display unit configured Visionlink super signal processing board can be multi-channel RGB, video signals , in full-screen mode within a single screen or full screen display.
Mixed display various types of signal
Universal multi-screen processor capable of handling ultra-high resolution graphics computer network splicing signals,lcd module video signals and RGB signals and different types of cross-screen display signal superimposed display function, either way the signal window can be arbitrarily reduced, enlarged , cross-screen or full screen.
Large screen display system application in the coal industry
With the coal industry automation, information technology, the increasing level of technology , to enhance safe production management efficiency , improve production dispatching advanced and fast . It is necessary to set up an industrial video surveillance system. Through the production of major aspects of workplace surveillance , command and control personnel can direct observation to monitor the real-time production site for dispatch personnel to provide fast, dynamic , convenient and practical information, 240x128
lcd and provide some decision support. Is to improve the level of coal mine production scheduling important measures. But also improve the efficiency of an important guarantee for mine production .
Mine industrial video surveillance system consists of cameras , PTZ, PTZ decoder , video servers, transmission fiber , fiber optic transceivers , video surveillance server ( large screen display system ) and other components.
Through the mine surface and underground meeting rooms and places to set the main production processes with PTZ Color Camera , on the one hand , in the mine control room to monitor real-time on the screen ; hand, through the LAN exchange received video conference system television and telephone conference to achieve the shared screen . While the large screen display system can also mine safety monitoring system to monitor the graphic files and real-time data to be displayed.
Based on large-screen system consists DMDTM ( digital light processing systems ) technology projection unit ( including projection cubes , DLPTM projectors, professional rear projection display ) multi-screen control systems ( including multi-screen controller , video matrix switcher ) ,TFT Lcd Modules the monitor , the system control and related peripheral devices ( cabinet , base , cable etc.).
Mine industrial video surveillance system consists of cameras , PTZ, PTZ decoder , video servers, transmission fiber , fiber optic transceivers , video surveillance server ( large screen display system ) and other components.
Through the mine surface and underground meeting rooms and places to set the main production processes with PTZ Color Camera , on the one hand , in the mine control room to monitor real-time on the screen ; hand, through the LAN exchange received video conference system television and telephone conference to achieve the shared screen . While the large screen display system can also mine safety monitoring system to monitor the graphic files and real-time data to be displayed.
Based on large-screen system consists DMDTM ( digital light processing systems ) technology projection unit ( including projection cubes , DLPTM projectors, professional rear projection display ) multi-screen control systems ( including multi-screen controller , video matrix switcher ) ,TFT Lcd Modules the monitor , the system control and related peripheral devices ( cabinet , base , cable etc.).
2013年10月8日星期二
The role of audio and video matrix
In modern multimedia conference room , in order to meet the needs of different occasions demonstrated , usually with a variety of different audio and video sources and display terminal ,lcd graphic display modules although these audio and video sources and display terminal may also have composite video (Composite-Video) , S-video (S-Video), component video (Component-Video) or digital video (DVI, SDI) interface, but now in the multimedia video conferencing are still commonly used composite video matrix , the main reason in the following few areas:
· Composite video with good stability, compatibility and versatility , the transmission bandwidth is small , the transmission distance is long . But chrominance and luminance share 4.2MHz (NTSC) or 5.0 ~ 5.5MHz (PAL) frequency bandwidth between each other a relatively large crosstalk , equipment and transmission cable on the requirements of the standard is not high , the signal source rich , embedded cable lower investment .
· Super Video (S-Video) While in reducing loss of brightness , brightness / chroma crosstalk significantly better than composite video , but for now common LCD projectors , DLP projectors and reach a very significant difference, and embedded composite video cable is double the investment , so long-distance transmission projects not widely used.
· Component video signal format has been significantly higher than the level of the composite video or S-video , but mostly in the conference room for the computer display (VGA or RGBHV signal format ) services, equipment and transmission cable is demanding ( depending design standards and the expected investment budget ) , embedded cable investment is very high.
· Similarly Y, RY, BY, Y, Cr, Cb component video signals currently mainly used in the broadcasting industry , and will gradually SDI or HD-SDI digital signal format transition , due to the signal source and the capital budget constraints, meeting room using much. DVI signals due to the effective transmission distance ( 5 meters ) , and is currently not widely used .
Summing up the classification , mini lcd module it is customary audio and video matrix are not particularly specified default composite video format. Composite video output format to the main equipment: cameras, physical booth , cable modem, remote video conferencing , video tape recorders , DVD players , etc., audio and video matrix systems intermediary in the video source and the display terminal or reuse Rooms, responsible for different audio and video signal source according to the user's wishes for centralized control .
· Composite video with good stability, compatibility and versatility , the transmission bandwidth is small , the transmission distance is long . But chrominance and luminance share 4.2MHz (NTSC) or 5.0 ~ 5.5MHz (PAL) frequency bandwidth between each other a relatively large crosstalk , equipment and transmission cable on the requirements of the standard is not high , the signal source rich , embedded cable lower investment .
· Super Video (S-Video) While in reducing loss of brightness , brightness / chroma crosstalk significantly better than composite video , but for now common LCD projectors , DLP projectors and reach a very significant difference, and embedded composite video cable is double the investment , so long-distance transmission projects not widely used.
· Component video signal format has been significantly higher than the level of the composite video or S-video , but mostly in the conference room for the computer display (VGA or RGBHV signal format ) services, equipment and transmission cable is demanding ( depending design standards and the expected investment budget ) , embedded cable investment is very high.
· Similarly Y, RY, BY, Y, Cr, Cb component video signals currently mainly used in the broadcasting industry , and will gradually SDI or HD-SDI digital signal format transition , due to the signal source and the capital budget constraints, meeting room using much. DVI signals due to the effective transmission distance ( 5 meters ) , and is currently not widely used .
Summing up the classification , mini lcd module it is customary audio and video matrix are not particularly specified default composite video format. Composite video output format to the main equipment: cameras, physical booth , cable modem, remote video conferencing , video tape recorders , DVD players , etc., audio and video matrix systems intermediary in the video source and the display terminal or reuse Rooms, responsible for different audio and video signal source according to the user's wishes for centralized control .
Four kinds of principles and techniques of contrast touch screen
Touch screen system generally consists of two parts : a touch detection devices and touch screen controller . Touch detection device is mounted in front of the monitor screen , for detecting a user touch position, a touch screen controller receiving evacuation ; touch screen controller 's main role is the touch point detecting means to receive touch information and convert it into contact coordinates , sending to the CPU, it also can receive commands sent to the CPU and executed .
With advances in technology , touch-screen technology also experienced a gradual upgrade from low to high and the development process. According to its working principle , its current is generally divided into four categories: resistive touch screen , capacitive touch screen , infrared touch screen and surface acoustic wave touch screen .
Resistive Touch Screen
Resistive touchscreen screen body part is a multi-layer composite film by a layer of glass or plexiglass as a grass surface is coated with a layer of transparent conductive layer (ITO film ) , above the outer surface and then covered with a layer of hardened , smooth scratch plastic layer . Its inner surface is also coated with a layer of ITO, a conductive layer between the two layers of many small ( less than one thousandth inch ) transparent isolation points separate them . When the finger touches the screen , the two ITO contact occurs , resistance changes , the controller detects a change in resistance to calculate the coordinates of the contact point , and then follow this coordinate to the corresponding operation . Lead resistance screen according to number of hours , divided into four or five lines and other types. Five-wire resistive touch screen is a conductive outer surface of the glass rather than the conductive coating layer, a longer life of this conductive glass , the transmittance is higher.
Resistive touch screen ITO-coated brittle fracture easily if too thin , thick coating will reduce internal reflection of light and the formation of reduced clarity. As has often been touched , use ITO surface after a certain time hairline cracks , and even variant, so its life did not last long .
Resistive touch screen is cheap and easy to produce , and thus it is still more common choice. Four -wire , five -wire and seven lines, eight -wire touch screen to make it appear more reliable , but also to improve its optical properties.
Capacitive touch screen
Capacitive touch screen are plated on the narrow sides of the electrode which is formed within a low-voltage AC electric field . Touch screen labeled with a transparent film layer , which is a special metal conductive materials . When the user touches the capacitive screen , the user's finger and face forming a capacitive coupling, because the work surface is connected with high-frequency signals , so fingers will suck a small current , respectively, from the current electrodes on the four corners of the screen in the outflow ; , and theoretically the current flowing through the four electrodes and the finger is proportional to the square of the distance from the controller through the four current ratio of precise calculation , the contact point can be derived .
Capacitive touch screen dual glass not only protect conductors and sensors , more effectively prevent external environmental factors affect the touch screen , even if the screen is stained filthy ,color lcd display module dust or grease, capacitive touch screen is still able to accurately calculate the touch location . However, since the capacitor with the temperature, humidity or changes in the different ground conditions , its stability is poor , often produce drift.
Although not so extensive application of resistive , capacitive touch screen is also popular for the election type. Such equipment precision , fast response, slightly larger size also has a higher resolution , more durable ( scratch resistant ) , and thus suitable for use as a touch screen consoles . Moreover , emerging near-field imaging technique improved performance capacitive touch screen , weakening it and the resistive touch screen drift may occur .
Infrared touch screen
Infrared touch screen arrangement of the four sides of the infrared emission control and infrared receiver tube , which correspond to the formation of horizontal and vertical cross- infrared matrix . When the user touches the screen , the finger will be blocked if they had been the location of two infrared controller can be judged by calculating the position of the touch point .
Infrared touch screen is also not current, voltage and electrostatic interference, suitable for certain harsh environments. Its main advantage is low cost, easy to install, can be used in various grades on the computer . In addition, since no capacitor charging and discharging process , the response speed faster than capacitive , but lower resolution .
Surface acoustic wave touch screen
A surface acoustic wave is an ultrasound , which is the medium (e.g., a rigid material such as glass or metal ) Surface Shallow mechanical energy wave propagation . By triangular wedge base ( designed strictly according to the wavelength of the surface wave ) , can be directed , a small surface acoustic wave energy emission angle . Surface acoustic performance, ease of analysis, and in the transverse transfer process has a very sharp frequency characteristics , in recent years, non-destructive testing, imaging and exit filter applications such as rapid development .
The four corners of the touch screen display has an ultrasonic transmitter transducer and the receiving transducer , and can send an ultrasonic cover the screen surface . When the fingers touch the display, due to absorption of some of the acoustic energy , the change in the received waveform , the waveform has an attenuation at a time gap, the controller can be calculated based on the signal attenuation of the touch point .
Surface acoustic wave touch screen independent of temperature, humidity and other environmental factors, high resolution , excellent scratch resistance , long life ( 50 million times without failure ) ,TFT LCD Displays high transmittance ( 92% ) , to maintain a clear translucent image ; does not drift , just installed a correction ; has a third axis ( ie pressure axis ) response , the most suitable for use in public places .
Surface acoustic wave touch screen susceptible to water droplets, dust, effects of improvement of the method is to add dust , dirt , or to increase the monitoring of the efficient operation accurately identify the difference between and dirt . In addition, the acoustic screen can feel the pressure , potentially increasing the means of control, on -screen feature is very beneficial expansion of its scope of application thus greatly expanded .
With advances in technology , touch-screen technology also experienced a gradual upgrade from low to high and the development process. According to its working principle , its current is generally divided into four categories: resistive touch screen , capacitive touch screen , infrared touch screen and surface acoustic wave touch screen .
Resistive Touch Screen
Resistive touchscreen screen body part is a multi-layer composite film by a layer of glass or plexiglass as a grass surface is coated with a layer of transparent conductive layer (ITO film ) , above the outer surface and then covered with a layer of hardened , smooth scratch plastic layer . Its inner surface is also coated with a layer of ITO, a conductive layer between the two layers of many small ( less than one thousandth inch ) transparent isolation points separate them . When the finger touches the screen , the two ITO contact occurs , resistance changes , the controller detects a change in resistance to calculate the coordinates of the contact point , and then follow this coordinate to the corresponding operation . Lead resistance screen according to number of hours , divided into four or five lines and other types. Five-wire resistive touch screen is a conductive outer surface of the glass rather than the conductive coating layer, a longer life of this conductive glass , the transmittance is higher.
Resistive touch screen ITO-coated brittle fracture easily if too thin , thick coating will reduce internal reflection of light and the formation of reduced clarity. As has often been touched , use ITO surface after a certain time hairline cracks , and even variant, so its life did not last long .
Resistive touch screen is cheap and easy to produce , and thus it is still more common choice. Four -wire , five -wire and seven lines, eight -wire touch screen to make it appear more reliable , but also to improve its optical properties.
Capacitive touch screen
Capacitive touch screen are plated on the narrow sides of the electrode which is formed within a low-voltage AC electric field . Touch screen labeled with a transparent film layer , which is a special metal conductive materials . When the user touches the capacitive screen , the user's finger and face forming a capacitive coupling, because the work surface is connected with high-frequency signals , so fingers will suck a small current , respectively, from the current electrodes on the four corners of the screen in the outflow ; , and theoretically the current flowing through the four electrodes and the finger is proportional to the square of the distance from the controller through the four current ratio of precise calculation , the contact point can be derived .
Capacitive touch screen dual glass not only protect conductors and sensors , more effectively prevent external environmental factors affect the touch screen , even if the screen is stained filthy ,color lcd display module dust or grease, capacitive touch screen is still able to accurately calculate the touch location . However, since the capacitor with the temperature, humidity or changes in the different ground conditions , its stability is poor , often produce drift.
Although not so extensive application of resistive , capacitive touch screen is also popular for the election type. Such equipment precision , fast response, slightly larger size also has a higher resolution , more durable ( scratch resistant ) , and thus suitable for use as a touch screen consoles . Moreover , emerging near-field imaging technique improved performance capacitive touch screen , weakening it and the resistive touch screen drift may occur .
Infrared touch screen
Infrared touch screen arrangement of the four sides of the infrared emission control and infrared receiver tube , which correspond to the formation of horizontal and vertical cross- infrared matrix . When the user touches the screen , the finger will be blocked if they had been the location of two infrared controller can be judged by calculating the position of the touch point .
Infrared touch screen is also not current, voltage and electrostatic interference, suitable for certain harsh environments. Its main advantage is low cost, easy to install, can be used in various grades on the computer . In addition, since no capacitor charging and discharging process , the response speed faster than capacitive , but lower resolution .
Surface acoustic wave touch screen
A surface acoustic wave is an ultrasound , which is the medium (e.g., a rigid material such as glass or metal ) Surface Shallow mechanical energy wave propagation . By triangular wedge base ( designed strictly according to the wavelength of the surface wave ) , can be directed , a small surface acoustic wave energy emission angle . Surface acoustic performance, ease of analysis, and in the transverse transfer process has a very sharp frequency characteristics , in recent years, non-destructive testing, imaging and exit filter applications such as rapid development .
The four corners of the touch screen display has an ultrasonic transmitter transducer and the receiving transducer , and can send an ultrasonic cover the screen surface . When the fingers touch the display, due to absorption of some of the acoustic energy , the change in the received waveform , the waveform has an attenuation at a time gap, the controller can be calculated based on the signal attenuation of the touch point .
Surface acoustic wave touch screen independent of temperature, humidity and other environmental factors, high resolution , excellent scratch resistance , long life ( 50 million times without failure ) ,TFT LCD Displays high transmittance ( 92% ) , to maintain a clear translucent image ; does not drift , just installed a correction ; has a third axis ( ie pressure axis ) response , the most suitable for use in public places .
Surface acoustic wave touch screen susceptible to water droplets, dust, effects of improvement of the method is to add dust , dirt , or to increase the monitoring of the efficient operation accurately identify the difference between and dirt . In addition, the acoustic screen can feel the pressure , potentially increasing the means of control, on -screen feature is very beneficial expansion of its scope of application thus greatly expanded .
2013年10月7日星期一
DLP LCD PDP three kinds of large-screen display technology principle explain
After ten years of development , large-screen systems have been widely used in various fields , but due to large-screen products have a certain degree of technical difficulty and high technology content, so far, there is still a large part of for the large-screen display users know little about the product , so the projection of the times network users should be required to popularize something about today's large-screen market, three major technical knowledge , because only by understanding this can we better understand the product.
From a technical type to points, then , large-screen products can be divided into the mouth , DLP rear projection display unit , Character LCD Module liquid crystal splicing unit and PDP plasma splicing unit three categories. With their advantages , these three technologies currently in the market competition is very close but in the end these three technologies is better, I believe after reading the following description , your mind will naturally clear.
Patchwork " and no one can " DLP rear projection display
DLP 's full name is "Digital Light Procession", Chinese meaning is digital light processing , which means that this technology through the digital video signal to be processed first , then put out the light projection . That specific point is , DLP projection technology applied to digital micromirror chip (DMD) as the key processing elements in order to achieve digital optical processing.
The principle is that through UHP lamp emits cold light through a condensing lens , the light through Rod homogenized , after treatment, the light passes through a color wheel will be divided into three RGB primary colors of light , color and then projected by the lens on the DMD chip , the last after a reflective projection lens image on the projection screen .
DLP rear projection display wall by a plurality of display units splicing , its main feature is a small patchwork , patchwork minimum it can reach tenths of a millimeter , can be truly "seamless " stitching, which is the other two technologies LCD and PDP can not match and the .
Of course, DLP splicing also has its drawbacks . As a light source DLP splicing is from the bulb , causing its power consumption, heat dissipation is high, but after a period of time there will be decrease in brightness , causing the user must constantly replace the lamp to maintain the initial display, and its unit box the body, the installation will cause some trouble , lcd module etc., to the user's inconvenience.
But with the splicing technology continues to evolve, the current DLP splicing has been resolved frequent replacement bulbs, power consumption, heat dissipation higher range of issues , which have benefited from the LED light source added . After using a LED light source DLP splicing unit , not only in life to get on a larger breakthrough, while in color with power and other aspects of revolutionary change , so DLP splicing remain market-leading advantage.
From a technical type to points, then , large-screen products can be divided into the mouth , DLP rear projection display unit , Character LCD Module liquid crystal splicing unit and PDP plasma splicing unit three categories. With their advantages , these three technologies currently in the market competition is very close but in the end these three technologies is better, I believe after reading the following description , your mind will naturally clear.
Patchwork " and no one can " DLP rear projection display
DLP 's full name is "Digital Light Procession", Chinese meaning is digital light processing , which means that this technology through the digital video signal to be processed first , then put out the light projection . That specific point is , DLP projection technology applied to digital micromirror chip (DMD) as the key processing elements in order to achieve digital optical processing.
The principle is that through UHP lamp emits cold light through a condensing lens , the light through Rod homogenized , after treatment, the light passes through a color wheel will be divided into three RGB primary colors of light , color and then projected by the lens on the DMD chip , the last after a reflective projection lens image on the projection screen .
DLP rear projection display wall by a plurality of display units splicing , its main feature is a small patchwork , patchwork minimum it can reach tenths of a millimeter , can be truly "seamless " stitching, which is the other two technologies LCD and PDP can not match and the .
Of course, DLP splicing also has its drawbacks . As a light source DLP splicing is from the bulb , causing its power consumption, heat dissipation is high, but after a period of time there will be decrease in brightness , causing the user must constantly replace the lamp to maintain the initial display, and its unit box the body, the installation will cause some trouble , lcd module etc., to the user's inconvenience.
But with the splicing technology continues to evolve, the current DLP splicing has been resolved frequent replacement bulbs, power consumption, heat dissipation higher range of issues , which have benefited from the LED light source added . After using a LED light source DLP splicing unit , not only in life to get on a larger breakthrough, while in color with power and other aspects of revolutionary change , so DLP splicing remain market-leading advantage.
PDP plasma / DLP, LCD liquid crystal three technical features
PDP advantages:
Single screen evenness
Initial installation of high brightness
PDP Disadvantages:
Large gap pixels
Fatal flaw : lcd module computer images or static images easily burning
Brightness decay fast and can not be improved
Low reliability , high power consumption
DLP Advantages:
Digital display brightness decay slowly
Pixel gap is small, exquisite images
Display the computer for a long time and still images
High reliability , low power consumption
DLP Disadvantages:
Brighter than the plasma is low, but bright enough for a long time watching
LCD LCD advantages:
Low power consumption , light weight , long life ( generally work more than 50,000 hours ) , no radiation, such as screen brightness uniformity
LCD LCD Disadvantages:
Easy to put bigger size , can not do seamless
Conclusion
From advanced technology is , PDP due to the basic principles of imaging limitations , has been with the DLP and LCD development and cost reduction gradually phased out , for the newly created system , recommended to choose more technologically advanced OLED Display products
Single screen evenness
Initial installation of high brightness
PDP Disadvantages:
Large gap pixels
Fatal flaw : lcd module computer images or static images easily burning
Brightness decay fast and can not be improved
Low reliability , high power consumption
DLP Advantages:
Digital display brightness decay slowly
Pixel gap is small, exquisite images
Display the computer for a long time and still images
High reliability , low power consumption
DLP Disadvantages:
Brighter than the plasma is low, but bright enough for a long time watching
LCD LCD advantages:
Low power consumption , light weight , long life ( generally work more than 50,000 hours ) , no radiation, such as screen brightness uniformity
LCD LCD Disadvantages:
Easy to put bigger size , can not do seamless
Conclusion
From advanced technology is , PDP due to the basic principles of imaging limitations , has been with the DLP and LCD development and cost reduction gradually phased out , for the newly created system , recommended to choose more technologically advanced OLED Display products
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