Color temperature adjustment can affect the color style

Color is the most common source spectral quality indicators , unit K ( Kelvin ) . In general , any light color temperature is equivalent to the above blackbody emit the same color as being "temperature ." Color is actually a psychological effect on the physical , all colors impression produced is due to intermittent spectral response in the eye , so the color temperature is only used to represent the color of the visual impression.

Everyone has a different color preferences , some people like gaudy colors, it was love pastel colors , different color styles , can be achieved by adjusting the color temperature , the higher the color temperature, the more bluish color , are cool colors .graphic lcd display module The lower the temperature, the reddish color , are warm . When we adjust the TV's color temperature can be determined according to individual preferences and the use of environmental lighting effects , so that the LCD TV color style in line with their preferences .

The impact of gaudy color screen chroma

Chroma also known as color saturation , hue determines the level of gaudy color LCD TV . Therefore , to get the screen LCD TV better performance , it is reasonable to adjust the color saturation is also very important.
In general , rich colors like style , color can increase some ; like pastel colors style , color can not be adjusted too raised . However, if the color saturation is too low , then the screen will lose color ; color saturation is too high , because the color too gaudy , but also can not normally watch .

Tone adjustable screen style

Hue is the basic tendency LCD TV screen color appearance . In lightness , purity, hue these three elements , certain factors play a leading role , we call it a certain hue. We usually tint on the screen can be defined from the hue, lightness , air purity in four areas .Serial Lcd Display Module Specific to LCD TVs , the different types of programs , such as nostalgic films, romance films, youth films, war films , each have a different color, a different director to shoot out of the film , but also have different tones. So , enjoy the movies at the time, according to different movie , adjust the tones in the menu , which makes the picture more realistic performance .

Inside LCD TV tuning skills

Into the LCD TV stores found each product colors are so bright , detail is so good, tempted to hurry to buy a home , go home to your TV signal found unsatisfactory results too , could not find in stores screen feeling respected sales staff to enhance the quality of a certain technology could not find a place to play a role . This is believed to buy too many LCD TVs have met friends , mostly through the final sales staff satisfaction after adjustment for television .

Why store in the picture effect so well ? Stores live broadcast of the screen, usually demo piece , is not only high-definition screen , and after a certain amount of technical processing , usually with a static screen -based, it does not even move the screen too fast. So the picture must not be blinded by the store when purchasing a TV , ultimately depends on the TV display technology .

How to get a good picture in the store ? First, have a good source to enjoy a quality picture viewing experience. Many families do not have high-definition signals , still using analog signals, then there will be little snow , image distortion and so on. With the popularity of digital signals , the effect of the LCD screen has been enhanced in many families , in order to truly achieve high results will need to be equipped with a high-definition set-top box , or use the HD player or Blu-ray player to achieve high -quality enjoyment.

Of course, this is the hardware requirements , for there are some aspects of the regulation of soft knowledge of quality improvement , only to get to the satisfaction of both hardware and software picture effect .

Before I introduce the LCD TV screen calibration method, first teach you a method to detect dead pixel LCD . LCD panel is the most important part of LCD TVs , bought back if there is a fly in the ointment is really bad points . So before inspection methods to learn to check dead pixels , dead pixels , then you can choose to reject TV , manufacturers direct exchange , if you do not check the dead pixel , then wait for a period of time with a not so good at the manufacturers rediscovery negotiate it.

Type of dead pixels

Bad points : Because three of the corresponding pixel liquid crystal cell drive tube failures have occurred in any color of the background is rendered as black or pure white pixels.

Highlights : if the corresponding pixels of the three liquid crystal cells , only one or two of the drive tube is faulty , then a black background is rendered in red , green and blue in a color pixel ; or should the original red , green, and blue dots but appear white .

Detection Method dead pixels

1 , with a test disc detection

Only with a black, white , red, green , blue five solid screen test disc into the DVD drive , select all black , all white , or red, green, and blue color background , if you are black, white , different color luminous point appears , it means that this LCD TV exists dead pixels.


2 , check with your computer's video card

Using a computer with an lcd module TV connected to a variety of solid color rendering method to make TV screens . However, this method requires you to consider interface problems , such as VGA interface is a common interface to the computer , if there are just TV VGA interface , simply prepared a VGA cable on the TV and select the "PC (VGA) input signal source ." press the manual settings on your TV , then by like TFTtest, CheckScreen, DisplayMate software in a solid color screen to display the desired screen.

If the above method is feasible for you , can also be directly connected to the cable , the use of a television screen , still image function detected by the TV .

Finally, the need to remind you is this: not all LCD TV has a dead pixel , but all manufacturers have a range for the number of dead pixels explained , generally ranging from 3, 5 or 8 , which is on the quality of the manufacturers strictly related to the degree of control . It is recommended that consumers should be told in advance about the number of vendors and associated procedures returned dead pixels agreement.

Most of LCD TVs picture settings menu , there will be brightness, contrast , color temperature,low temperature lcd color saturation , hue and other options, the value of these options will be adjusted to a reasonable position , can significantly improve the LCD TV display , it displays screen more suitable for our appreciation habits. Now, I gave you talk about what each of these options have played the role , so that we are better able to adjust their own future LCD TV .

LCD module production technology

LCD module production technology

SMT
Surface mount technology
That surface mount technology ,custom lcd module which is a more traditional installation. The advantage of high reliability, the disadvantage of large size, high cost , miniaturization limit LCM .
COB
Chip On Board
That chip is bonding (Bonding) on the PCB, due to the LCD controller IC manufacturers and related
Production is reduced on-chip (SMT a ) encapsulation yield QFP, therefore , the conventional SMT system is gradually replaced in future products.
TAB
Tape Aotomated Bonding
Anisotropic conductive adhesive connections. The package in the form of TCP (Tape Carrier
Package tape carrier package) are fixed to the IC and PCB LCD anisotropic conductive adhesive . This installation method can reduce the LCM of weight, volume, easy installation, good reliability !
COG COG LCD Module
Chip On Glass
Chip bonding directly on the glass . This installation method can greatly reduce the volume of the entire LCD module , and easy mass production for consumer electronics products with the LCD, such as: mobile phone , PDA and other portable electronic products. This installation in the IC manufacturer's push connection in the future will be the main IC and LCD .
COF
Chip On Film
Chip is directly mounted on the flexible PCB. A high degree of integration of this connection ,lcm module external components can be mounted on flexible

Network HD LCD splicing screen Problems

With the development of technology, and we seek to work in all aspects of the efficiency of any single function device eliminated eventually escape fate . Therefore , LCD splicing screen demand for network -oriented is much more urgent. Influence in today's intelligent devices , users of high-definition LCD screen splicing abnormalities favor , LCD splicing screen high-definition imaging to achieve splicing ,OLED Display the key lies in whether the existing system interface compatibility currently available in high-definition digital technology hd-sdi is more suitable for a class LCD splicing screen interface technology, it has a transmission distance, interface compatible , easy to install , standard features relatively well , it can serve as an important way to achieve the current screen LCD splicing screen high-definition imaging .
Moment , the network is a security monitoring or video display device , and even the main direction of the broader field of self-development . With different surveillance cameras , network for the transmission of LCD splicing screen has a huge advantage in the case of transmission distance it can still ensure high picture quality , achieve megapixels and more. Although the transmission network in , LCD splicing screen large screen is also facing the same package is lost, delayed data compression defects . However , faced with fierce competition from the current display technologies , LCD splicing screen difficult to give up the desire for networked .
With the expansion of LCD splicing screen applications , lcd module splicing screen has gained , but the LCD screen mosaic patchwork need to break through the bottleneck of the original , and in accordance with market demand to diversify . LCD splicing screen technology for their development really a great proportion.

LCD Display Identification and stitching quality entertainment applications

LCD splicing screen has entered all walks of life , has a strong advantage in brightness, color , sharpness, viewing angle, life, environmental adaptability , and many other areas , making the LCD splicing screen on the market with the development of high-growth trend. Meanwhile, its diverse applications , prompting Japanese LCD splicing screen size models varied products . Here, we identify a method to tell the quality of the LCD splicing screen .
An LCD screen size after stitching patchwork . If larger , of course, can not choose , and now manufacturers are using DID LCD screen, ultra-narrow border design, stitching the smallest gap is only a few millimeters can make a complete and clear picture quality rendering.
2 . Viewing angle. With advances in LCD technology, the normal viewing angle LCD splicing screen has reached more than double to 178 degrees .
3 . Contrast. This is also an important indicator to measure the LCD splicing screen , and when we have to watch the movie scene when the characters from the chiaroscuro contrast level can be presented .
4 brightness. The brighter the LCD screen is particularly eye-catching. LCD display is a solid and liquid substances between before , which itself is not luminous, its brightness is determined by the panel behind the backlight lamp to achieve, so the relationship between the number of lamps LCD screen brightness.
Structure 5.LCD splicing screen . A complete LCD splicing wall is composed of multiple splicing unit spliced ​​form of m × n is made ​​, day and night are no longer needed to work non-stop operation , which requires splicing LCD screen with a strong stability.
6 LCD splicing screen in what the panel. It directly affects the LCD splicing product performance and service life , but also affect the client's brand and reputation of the manufacturer .

With the application of large-screen LCD splicing products more widely, competition within the industry but also in the gradual warming, thus contributing to the liquid crystal mosaic manufacturers have to upgrade its technology, control production costs , which can effectively control the LCD splicing products the final price and provide more quality services. Coupled with a large screen LCD splicing has so many super- excellent overall results, especially on the screen size and visually stunning , crystal mosaic in the application of the absolute superiority of public entertainment is more than a little bit. In KTV halls , and its showing a clear and smooth display, pleasing colors and delicate senses , allowing all customers to shop entertainment to enjoy large-screen display brings a different kind of visual feast.

Under the drive market demand, LCD splicing products in the future is bound to show its mettle in entertainment. To meet market needs , Rui An electron must constantly upgrade their technology OLED Display, to provide customers with more quality and cheap LCD Video Wall products and considerate services in place to drive healthy competition in the market, to bring entertainment to the user a win-win situation. While on the surface, the price of LCD splicing products relative to the current price of the most commonly used flat panel TV entertainment and projectors in terms remains to be high on a lot , but the presentation of the LCD splicing overall advantage is that they can not match.

With the rising economy, people enjoy the quality of life requirements are constantly undergoing change , and now the bar pastime guests on behalf of the brand image reflects the upgrade function and have a strong contemporary video display equipment requirements are also increasingly high . Flat-panel TVs and projectors have been traditionally used the bar in terms of price advantage, but the lack of technology and the effects on their existence, and in front of the LCD splicing technology can be easily resolved, with prices down, the entertainment industry, users are beginning to generally optimistic and accept the LCD-screen products.

LCD screen splicing products with high brightness , high resolution , low power consumption , light weight , long life ( generally around 60,000 hours working properly ) , no radiation, up to 97% color saturation , the screen brightness uniformity , beautiful color other advantages. Recall that a few years ago , the price of 40-inch LCD splicing units are generally in the range of about 8000 to 10,000 yuan , while just a year ago Graphic OLED Display, Rui An electronic pioneered reported a 40- inch full HD LCD splicing Price unit is only 3,800 yuan, once played a chain reaction , domestic manufacturers have cut prices , resulting in final prices are generally falling down.

All kinds of LCD Video Wall System rapidly growing popularity in all fields

LCD Video Wall with the various types of computer analog / digital signals , composite video signal , color difference signals , such as on the big screen , and to achieve the switching signal , superimposed combination functions. Has become a safe city command center , Railway ( MTR ) , ports, terminals surveillance systems, intelligent traffic management control center , defense or military surveillance systems, power control and supervision system , large industrial control systems , financial management and monitoring systems, television studio or a large center monitor walls, large venues background walls, video conferencing and other information collection, processing key display device. Currently, the LCD display mosaic wall mosaic tiled display system has been developed into one of the mainstream technologies, relative to the DLP and PDP, LCD splicing wall of a longer life, and lower power , less heat , the failure rate is very low , more suitable to 24 hours of continuous use security monitoring large-screen mosaic wall selection .

Embedded LCD screen mosaic wall -to-market time is not long, but in the field of flat panel display wall has occupied an important position , it has a lightweight , thin, long life, low maintenance cost , low power consumption , no radiation , high-definition , etc. and praised by users. With the development of LCD technology, embedded hardware splicing technology , multi-screen image processing, signal switching technology related technologies such as video wall , the new large-screen mosaic wall in the terminal display device engineering applications rapidly in popularity.

Large screen digital display wall system to establish a management command to run a mechanism to integrate with data acquisition , processing, scheduling, feedback and other features that can enhance the resilience of the local coal mine , so that before the accident prevention and monitoring of emergency after the accident rescue and command ,TFT LCD Displays so as to promote a fundamental change in the coal business and technical progress of the coal industry management approach.

Large screen digital display wall systems can be obtained in a timely manner and is very intuitive mine safety and production information to facilitate monitoring and management , implemented in the central control room via digital mosaic wall , high- resolution, high -contrast display gas remote monitoring of networked mine situation . Lock state mining engineering drawings , and provides security features , see the adjacent coal mining tone drawings , viewing and measuring the distance , tune to see historical chart comparative analysis , etc., to solve the cross-border exploitation and provide an effective safety issues through technical means . Mine monitoring systems and the use of advanced fiber contact , to achieve city, county , three mine and mine monitoring center network management control and management , enabling the remote coal mine gas monitoring and analysis of the area , cross-border supervision of mining , gas hazards query , ventilation status query and safety regulation and management .

The coal industry "digital safe" integrated information network systems, application of large -screen digital display wall system for all kinds of information provides powerful processing and display functions , it is within the jurisdiction of mine safety production monitoring and control systems and information management systems to establish a database directly carried out on the map of high -resolution,Serial Lcd Display Module large-scale digital large screen mosaic wall engineering design, calculations, testing, production tracking , scheduling, management and information queries.

You know with LED TV

With the constantly updated display technology , mainstream TV is constantly refurbished. Today, LCD TV into the appliance store counters , we often see the words "LED TV" . So, what exactly is LED TV ? What are the characteristics of LED TV ? What to buy time and need to pay attention ?
Most problems many consumers face is "What is LED TV " "LED TV and LCD TV What's the difference ," and so on. In fact , LED TV only our popular name for it, strictly speaking , LED -backlit LCD TV is a more apt title.

In other words, the so-called LED TVs on the market , not a mainstream technology branch of flat-panel TVs , but the traditional CCFL backlit LCD TVs sources used to replace the new LED light source , which is essentially an LCD TV.
Well , LED as a light source , what characteristic? First, we still want to talk briefly about the imaging principle LCD TVs.

And Plasma TVs from different light source, LCD TV is a passive luminescence imaging , ie, need to use the LCD TV backlight emits light through the polarizer , then through the liquid crystal molecule layer , followed by another piece of color filter and polarizer and imaging. Since the liquid crystal molecules in the voltage fluctuation will change the angle of the arrangement of the light transmittance is changed to form an image change.

Used in traditional LCD TVs are called cold cathode fluorescent lamp CCFL backlight, as well as because of its mercury and other harmful substances , not environmentally friendly.
And a light emitting diode LED is the material known by the voltage change using the semiconductor light emitting chip , which has excellent light emitting characteristics not only better color saturation , fast response time , less light leakage . By increasing the contrast , regional control and other means , the display performance is much better than the CCFL technology. And do not contain mercury and other harmful substances, more healthy environment.

In addition , the use of LED backlight TV is thinner and lighter body , and longer life , usually LED life can reach 100,000 hours , 10 hours a day by using , you can use 27 years , compared to traditional light sources 5-6 years many long life , so popular with consumers .
In the field of television uses LED technology , Graphic LCD Display mainly primary colors of white and two technical branches.

White LED can emit white light, after the liquid crystal layer, and then through the R / G / B color filter into a separate color. LCD TV color quality of light quality is mainly determined by the backlight . RGB backlight spectrum of light for each primary color the higher the purity , the more pure colors to restore the order in the final , only to restore the pure RGB primary colors , in order to deploy a pure and true color effects.

White LED TV is divided into two sides of the direct type and style . Using side -emitting structures can be made ​​into a TV slim, ultra-thin LED TVs currently on the market and more are adopting this technology. Direct type white LED brightness can be adjusted locally , thus higher overall picture quality of some .
Another branch of technology that can be issued issued LED backlight technology R, G, B primary colors of light. Since the backlight RGB primary colors can be independently controlled to achieve a more wide color gamut , better color performance . While also effectively enhance the contrast of the TV , to achieve more accurate color gradation and layering more pictures , but also has three primary levels of local backlight adjustment function. Currently mainly used for high-end LCD TV.

In addition ,OLED Module some companies have developed on the basis of a more sophisticated technology, such as Sharp's Western -primary color display technology is the basis of the added RGB Y, that is yellow , so richer color performance .

What principle is leaked

LCD light leakage between the main screen is the agreement with the LCD lead frame does not close out the light transmittance of the lamp , this is a common problem in the LCD TV ,graphic lcd 128x64 or from a certain angle, a phenomenon can not be avoided , but is not the same extent .

LCD TV leaked the main reason there are two , the first is the question of the panel, when the panel is not good quality, or means of transport accidents , resulting in curved panels , so there will be a serious light leakage problem , if it is checked out at the factory in this case, the factory will be banned . Another is when assembled , convergence between the LCD panel does not close the border with the cause slight light leakage. But in general it is difficult to see out the naked eye , and only in total darkness environmental inspection to clearly see the light leakage.

What is the principle of light leakage is it ? We mentioned earlier , is due to problems caused by convergence , where the allowed range , is a normal phenomenon , but does not affect the life of the TV leaked , response time, brightness and other parameters. Countries have enacted regulations under the black case, leaked ≤ 4cd / standards.

We buy products TFT LCD Display television, a major concern dead pixels, bright spots , dark spots, light leakage and other factors, while the red , green and blue are the three basic color television , which is the main measure of television color parameters, we tested when the LCD TV is mainly used red, green, blue, white , and black colors to examine the quality of the product

Display a black screen how to solve

We often monitor the forums or other network in the way users see release on the "display a black screen" posts, which relate to the vast majority of mainstream brands currently on the market display products, the model in particular is abundant. So what are the factors which make the LCD screen is blank it?

Solve Step one: now most LCD monitors, especially the large-size LCD monitors are equipped with D-Sub and DVI-D interface, and some models even added more interface types, so when you reconnect LCD monitors, LCD monitors The IC chip is sometimes not automatically recognized signal source. Some users in the use of D-Sub interface, do not restart the operating system, the signal input interface directly replace DVI-D, even though LCD IC circuit have the automatic signal search function of the input source, but sometimes the chip is still in the switch enough "smart", search no input signal, then we need to adjust it manually. When the input signal through the DVI-D interface inputs, while the LCD monitor IC chip will input source selection in D-Sub interface, the screen of course can not reveal any information on the screen, thus showing all black, which is also known a lot of friends as "black." At this point, we press the "Switching input source" button (usually the SOURCE or INPUT button), so that the IC chip re-selection.

Some LCD monitors and no dedicated button to switch the input source, but they will in the OSD menu provide this functionality. When you select the correct input interface, the display will show the normal screen.

Step two solutions: Some users reflect their lcm module monitor does not have a black screen phenomenon, but intermittent black screen, sometimes black high frequency. This problem also has graphics and other host hardware problems, but do not rush to it that the host hardware. First we need to carry out a preliminary assessment of the fault, do not do any checking in the case, the failure is due to the liquid crystal display or other host device. We recommend consumers the best replacement of a normal host SPIDERS display, if the display does not fail, it indicates that the previous host fails; If the monitor still has the above phenomenon, it may be a problem with the display itself.

Solve Step Three: There are some users reflect themselves in the process of playing the game, the LCD display will suddenly appear blank screen. Most of the reasons for this phenomenon, there are two: the first one is referred to in the previous case, graphics and other host hardware part is damaged; Another possibility is the game and the operating system or the graphics card driver produced a conflicts. Although the game program and the operating system, graphics card driver produces relatively small chance, but this is sometimes still occur. Previous detection methods and time are identical, both the first determine whether the malfunction of the graphic lcd display module, and then one by one starting from the host start address.

If the test result is indeed the final LCD problem, then it should go to the respective brand service center for maintenance and inspection.

How to solve the display color is not normal

Display screen compared to other products, the biggest advantage is the color is more accurate, but due to certain factors, the display will appear the phenomenon of color is not normal. Typically there will be three kinds of display color is not normal forms:

1, the display color obvious abnormalities;

2, the color of the display subjective special preference;

3, the graphics card or graphics card driver failure, and software compatibility problems.

Solve Step one: When the display is a color cast, we should first check the connection part of the liquid crystal display, such as D-Sub, DVI, or other data signal line and the display interface or an interface card is securely attached, because most of the screen bias color problems are caused by loose connections or poor contact caused.Coding System lcd module We suggest that you connect the signal on the transmission line screws.

Solve Step Two: If it is not the connection problem, we recommend everyone in the system menu of the "Color" option, see "warm", "normal", "cool", "user-defined" This four common options to see whether we choose not to correct color options. For most ordinary users, use the default "normal" mode is sufficient. If the change is more complex, the user can select the system menu "Restore Defaults (restore factory settings)" option, restore the factory settings to the monitor.

Solve Step Three: If the first two parts are completely normal, we conducted the third step of checking: Check whether the video card or driver issue. This process is also very simple: the host computer is connected to a normal display, or connect the monitor to another normal host, to see if it still will be cast. If the issue is resolved, indicating that the host computer graphics card or driver's fault; if not resolved, indicating a liquid crystal display their own problems.

If the fault monitor itself, TFT LCD Displays so basically belongs to the internal circuitry chip failure problems, then we suggest that you should be sent to monitor the official brand service center for repair detection.

Frame interpolation technology popular

As early as 2006, because LCD exist response time tailing phenomenon, so a lot of manufacturers in order to solve this problem through the IC chip from the start, launched a number of solutions. BenQ launched the beginning of the "plug black" technology, followed by other manufacturers also used a similar technique, although the names and details are different, but the basic principle roughly.

The beginning display manufacturers adopted Over Driving technology

In fact as early as BenQ "plug black" before the display manufacturers to use Over Driving technology, which is the principle of forcible IC chip to increase the voltage across the liquid crystal panel to accelerate the deflection of the liquid crystal molecules, which play a role in reducing the response time, However, this approach does not fundamentally eliminate tailing phenomenon, but rather due to improper control pressure produce similar white blur, and many other side effects, so the technology did not able to get a good promotion and application.

BenQ monitors used "plug black" technology

BenQ's "plug black" low temperature lcd display technology will solve dynamic picture while producing ghosting problem, to achieve this objective should take two steps, the first step is to reduce the gray response time, the second step is to eliminate the steady-state display Smooth edges of ways. Use the two screens inserted between the way black screen, will effectively solve the smear effect.

Because the LCD display of the steady-state mode (display elements, such as backlight source is always displayed after opening at a certain level, unless you turn off, during which the change because the screen does not change), while the human eye in Look dynamic picture of the brain signals are transmitted automatically do the integral luminance conditions, so even if the response time of liquid crystal displays 0ms, will still see the blur, so "black plug" technology to simulate a CRT monitor pulse display, so that you can effectively solve the afterimage phenomenon.

Now insert the calculated display manufacturers to use the form of frames

However, not every image is made of black pixels as the main display, so just insert only the black frame is clearly not enough, so now many monitors and television manufacturers calculation frame frames inserted, namely IC chip based on two picture to calculate an element, allowed to have a better transition, and its principles and objectives and about "black plug" technique similar to, but different from the inserted frames. According to the actual needs of the user can see the different parameters on the lcd graphic display manufacturers fixed the case can also post an IC chip technology for different tuning and improvement to meet user demand for more.

How to enhance the effect of IC circuit

LCD monitors have been listed for nearly 10 years, it has completely replaced the traditional CRT monitors become the absolute mainstream of the market, we hereby ZOL monitor channel also launched a "basic display Hundred Questions" series of topics, from the subtle technical point of view as we opened one of these displays basic knowledge of secrets. We know that the color monitor LCD panel is to determine the effect of the main factors, while others will need to rely on the IC circuit part, in addition to controlling the accuracy of color reproduction, the manufacturers but also for everyday consumer use of adding a new feature, what are the main aspects of the function it?

Note: This series of topics for readers are new to the display, or want to learn the basics of the user display, if you think you have fully mastered monitor all kinds of knowledge, you can skip this confidence.

In the previous article, we have introduced the color LCD panel displays that affect performance results of the key factors, in addition to the display of the IC circuit is also a very important part, its main job is to "guide" LCD panel accurately show a variety of colors, in addition to the monitor according to the actual needs of manufacturers have joined the many new features.

● Dynamic Contrast technology

Dynamic Contrast is the first to come into contact with us through the IC circuit to control one of the technologies. For the lcd module, its response time and native contrast ratio is fixed, while the principle of dynamic contrast ratio is the IC chip will detect the contents of the screen, if the screen when it is found that most of the image is black, it will automatically issue a directive Let reduce backlight brightness, so that you can greatly reduce the brightness of the screen at this time, at maximum brightness remain unchanged at this time raised to 10,000:1 contrast ratio than we normally would this ratio is called "Dynamic Contrast" . The use of LED backlighting, the dynamic contrast ratio can reach 10 million: 1 or more.

With the popularity of LED backlight technology, the market dynamic contrast ratio LCD display once again been greatly improved from the previous 10,000:1 quickly raised to 100,000: 1 or even 10 million: 1. Dynamic contrast ratio enhancement can effectively increase the screen layering, and can slow down the display in all black screen light leakage, so consumers have the role of improving quality.

But when Dynamic Contrast is not necessarily the value the higher the better, when its value has reached a certain level, the improvement of its screen is no longer as 1000:1 to 10000:1 so obvious, so its value has continued to increase in significance not, so now despite the dynamic display manufacturers introduced a contrast ratio of up 100 million: graphic lcd display module 1 models, but did not apply this feature as the biggest selling point to publicity.

TV light leakage

What is the light leakage ? A: The light leakage is due to structural characteristics caused by the LCD screen itself , to a certain extent is a normal phenomenon , light leakage does not affect the brightness of the TV itself , response time, life and other basic technical parameters .

National digital television receiving equipment and performance standards of the working group pointed out that Liu Quanen : Due to the different levels of the LCD screen , at different levels of light leakage , color lcd display module January 1, 2007 from the implementation of the "digital TV LCD universal norms" clearly defined, LCD TV in all black case leaked to ≤ 4cd / ㎡ standard .


We usually through red, green, blue three basic TV color TV technology to measure the parameters of the situation , based on the particularity of LCD TVs , the purchase should be from the red , green, blue , white, black 5 colors to examine the quality of the product , so that in addition to the basic parameters can understand the situation , but also to avoid you purchased the product have dead pixels, bright, dark , light leakage and other unnecessary trouble.


LCD screen light leakage disadvantages of LCD technology itself , there is no effective solution . Current relevant legislation is still very lag , temporarily unable to carry out effective LCD leaked specifications ---- because of leaked liquid crystal display also can be seen. Also, light leakage does not affect the life of LCD monitors , color, etc.TFT Display Module  Technical parameters display itself , but in black or dark scenes will bring viewers uncomfortable feeling, so difficult to have a standard to measure how much light leakage will disrupt the viewing.

How to maintain the flat-panel LCD TVs

Today LCD TVs have entered the household, consumers use the process will inevitably encounter various problems, I 'll introduce a few LCD TVs maintenance of common sense .

First : readily off the TV can not be too diligent . This is not so that we waste energy, but to pay attention to weigh the power is turned on the TV Life. As we all know , the backlight for the LCD TV consumes all accessories in life the most serious one part , it and our home use fluorescent tubes are very similar . So, it 's life and times also ignite a great relationship . Start when the warm-up and high-voltage pulse sputtering cathode electron substance increases, shorten lamp life.

If you develop a habit of readily turn off the TV , four times a day to open computing , lamp life will be reduced to the original 1 /2.

Second: Avoid prolonged work . In the case of ultra-long work , the heat in the LCD TV accumulating inside the body , which is not enough for the other electronic components as much of a threat , but it is possible to burn the liquid crystal panel , thereby forming a large area of ​​dead pixels .

Third : Clean way to pay attention , Lcd display module you should use a dry cloth. Due to static reasons, LCD TV screen surface is easily contaminated with dust , but clean water is a very unwise way to clean. First, the general effect is clean , and easy to leave water marks . More importantly, the LCD is very easy to cause permanent damage due to damp , if water droplets penetrate the screen , should not energized , to make water in a warm environment slowly evaporate.

Fourth: Avoid scratches, twisted or hit the surface of the LCD screen . Useful for many people pointing fingers on the screen habits, which is the traditional television is irrelevant, but the LCD TV may cause fatal damage , but see themselves and their children and their toys , the LCD screen will bring any impact direct damage, and most likely to make entire screen scrapped.

Fifth: still images can also damage the LCD screen. At present, many LCD TVs with digital photo browsing, but for a long time for a picture display may cause damage to the LCD screen .

Do not use the machine in a long time ,OLED Display Module best to turn off the machine . The screen will display a long fragile components to aging , which may or may not burn the TV screen , but it may make the TV appear more dead pixels. Only bad point is always a white or black pixels, can not be repaired . To address this problem, some products specially set up display a still picture for too long, the TV automatically dimming feature to protect the LCD screen .

The liquid crystal display according to common physical structure divided into four

Enjoying every day that distinctive high -grade LCD display at the same time , do not forget the maintenance of this vital link. LCD only well maintained , only long-term trouble-free service for users . If you already have a LCD or flat panel displays, here's some very useful tips on you , and I will be following some of their own use and maintenance of the LCD monitor experience out and share with you .

Common LCD monitors according to the physical structure is divided into four categories:

① twisted nematic ( abbreviated TN, full TwistedNematic, mainly used in areas such as game consoles LCD screen ) ;

② super twisted nematic ( referred to STN, full SuperTN, the current multi- phone LCD screen is used ) ;

③ double super twisted nematic (DSTN, full DualScanTortuosityNomograph, early laptop computers and mobile phones and other digital devices currently used Jieyou ) ;

④ type thin film transistor (TFT, full ThinFilmTransistor, currently the mainstream ) .

TN LCD screen LCD screen is the originator of all kinds , and its technical principle is the cornerstone of the future development of the lcd modules screen . TN liquid crystal display comprises two layers of glass substrate , ITO film, with the film, a polarizing plate , etc. made of plywood , the upper and lower sandwich the liquid crystal molecules in the liquid crystal molecules near the upper interlayer according to the direction of the groove arranged in the upper part and the lower sandwich the liquid crystal molecules are arranged according to the direction of the groove bottom , the overall look , the liquid crystal molecules are arranged as a spiral twist .

Once the liquid crystal molecules through the electrode power , TN liquid crystal will become erect state, and sandwich the liquid crystal display of the two polarizing plates attached , these two polarizing plates arranged up and down and the transparent interlayer groove angle and the same arrangement in normal circumstances, the light irradiated from the top down , usually only one angle of light can penetrate down .

Imported by the upper polarizing plate laminated on the groove , and through the arrangement of the liquid crystal molecules twist polarizer from the piercing path , light penetration to form a complete way . When the liquid crystal molecules upright light can not pass , the result appears on the display black. This will form when the white light is not light when black , the picture can be displayed on the screen.

The current mainstream of a TFT type liquid crystal display components more complex , it is mainly a fluorescent tube , a light guide plate , a polarizing plate , filter plate , a glass substrate , with the film, the liquid crystal material , thin film transistors , etc. composition. TFT LCD Display with backlight fluorescent tube, the light will pass through a polarizer and then through the LCD , then the arrangement of liquid crystal molecules will change the angle of penetration of the liquid crystal light , then these rays must also pass in front of the color filter polarizer film with another one . And as long as changing the voltage applied to the liquid crystal can control the value of the last occurrence of light intensity and color , so you can change the LCD panel with different shades of color combinations.

LCD TVs summer maintenance tips

Nowadays LCD TV has been leading the entire television industry , fully into the household. What followed was a lot of LCD TVs often have some of the details in peacetime use and do not pay attention to the life cycle of maintenance led to the sharp drop , and easily lead to a large number of small problems . Current knowledge of the 'll introduce a few lcd module TVs maintenance tips to help you extend the life of the LCD TV .

First, do not turn off the TV is not readily let everyone waste of energy , but to pay attention to weigh the power is turned on the TV Life. Backlight LCD TV is the life of all parts consume the most serious one part , it and our home use fluorescent tubes are very similar . Life and times also ignited a great relationship . Start when preheating and high pulse sputtering cathode electron substance increases, will shorten the life of the backlight . If you develop a habit of readily turn off the TV , four times a day to open computing , backlight lamp life will be reduced to the original 1 /2.

Second, avoid prolonged work . This one is not with the above considerations conflict . In the case of ultra-long work , the heat in the LCD TV accumulating inside the body , which is not enough for the other electronic components as much of a threat , but the liquid crystal panel is likely to burn , and thus the formation of large areas of dead pixels .

Third, avoid cleaning the screen when energized . Wipe the water itself is a very unwise way to clean. General effect not only clean , but also easy to leave water marks , it is important that the LCD is very easy because of damp cause permanent damage ( If water droplets penetrate the screen , to let moisture in a warm environment slowly evaporate ) .

Fourth, avoid scratches , twisted or hit the surface of the LCD screen . Useful finger pointing to the screen on the LCD TV habit may cause fatal damage , but see themselves and their children and their toys , any impact on the mini lcd module screen , scribing will bring direct damage, and most likely make entire screen scrapped.

Resistive touch parsing and Comments

Resistive touch screen to control the use of pressure-sensitive touch screen . The main part of the resistive touch screen with a display surface is very thin with a resistance screen, which is a multilayer composite film , it is a layer of glass or hard plastic plate is used as grass , the surface is coated with a layer of transparent metal oxide ( transparent conducting resistance) conductive layer , above the outer surface and then covered with a layer of hardened , smooth anti-friction plastic layer , its inner surface is also coated with a coating , among them many of the small (less than 1/1000 inch) transparent isolated point of the two conductive layers separated by insulation. When a finger touches the screen, two conductive layers in the touch point position will have a contact resistance changes in the X and Y directions generated signal is then sent to the touch screen controller. Controller to detect and calculate the contact (X, Y) position , then according to the simulation of a mouse operation. This is the resistive touch screen technology of the basic principles . So resistive touchscreen available hard object manipulation . Resistive type touch screen technology is the key material , commonly used transparent conductive coating materials are:

ITO, indium oxide , a weak conductor , the characteristic is reduced when the thickness is 1800 Angstroms (Å = 10-10 m ) or less will suddenly become transparent , light transmittance was 80% , and then go on thin but decreased transmittance , time and up to 300 angstroms thickness to 80% . All ITO resistive and capacitive touch screen technology touch screen technology are used in the main material , in fact, resistive and capacitive touch screen technology is the ITO-coated face .

Nickel-gold coating , five -wire resistive touch screen of the outer conductive layer using good ductility nickel deposit coating materials , cell phone touch screen

Outer conductive layer due to frequent touch, use good ductility nickel deposit materials in order to extend the service life , but the technology costs more expensive . Nickel-gold conductive layer scalability is good, but only for transparent conductors, is not suitable as a resistive touch screen face, because it is high conductivity, and the metal is very difficult to achieve a uniform thickness , suitable for voltage distribution layer , only as a probe layer .

1 , four -wire resistive screen four -wire resistive analog technology work two transparent metal layers increases 5V constant voltage on each floor : a vertical direction and a horizontal direction . Total need four cables. Features: High -resolution , high-speed response. Surface hardness treatment, reduce abrasion, scratch and anti- chemical treatment. With glossy and matte . Time correction, high stability , and never drift.

Two , five -wire resistive screen five -wire resistive touch screen technology of the two primary directions of the voltage field through a precision resistor networks are added to the glass conductive work surface, we can simply be understood as sharing in both directions of the voltage field work plus in the same work surface , and the outer conductive layer of nickel-gold is only used as a pure conductor only , after a touch detection time- point of the inner ITO contacts X and Y- axis voltage value is measured as the position of the touch point . Five -wire resistive touch screen ITO need four wire inner and outer conductors only for just one , Graphic LCD Display the touch screen may Lead Total 5 . Features: High -resolution , high-speed transmission response. High surface hardness, reduce abrasion, scratch and anti- chemical treatment. 30 million times the same point contact can still be used. Conductive glass as the substrate media. Time correction, high stability , and never drift. Five -wire resistive touch screen with high-priced and high environmental requirements shortcomings.

3 , resistance screen limitations either four -wire resistive touch screen or five -wire resistive touch screen , they are kind of the outside world completely isolated working environment, 15-inch Industrial Touch Monitor ( touch screen applications ) are not afraid of dust and water vapor , it can be used any object to touch , can be used to draw and write , more suitable for industrial control and office limited use . Resistive touch screen is a common drawback is that because the outer layer of the composite film with plastic material , people do not know or use too much force may scratch the whole touch sharp touch screen scrapped as a result lcd graphic display. However, within limits , only scratch injured outside the conductive layer, the outer layer of conductive scratch for five -wire resistive touch screen is not related , while the four -wire resistive touch screen is fatal .

Three kinds of panel which is good

The type of relationship between the liquid crystal panel response time of the liquid crystal display , color, viewing angle , contrast, these important factors . LCD panel also occupies an LCD monitor costs about 70%. The other is the cost of the drive circuit and appearance . Therefore, the quality of the LCD panel LCD monitor plays a decisive role .

Different positioning of the display division level view, the liquid crystal panel also has a different type of division . Today I will tell you about the market now more common of the three panels are TN panels , IPS panels , VA panels. Monitor the outside hobbies here is not fine table , mainly for these three types of panels for a detailed description .

Section 2 TN panel features resolution

TN panel features resolution

TN panels all called Twisted Nematic ( twisted nematic ) panels, due to low prices , mainly for entry-level and midrange LCD , TN panels deflect the liquid crystal molecules are characterized by fast, so easy to improve the response time . But it is not as good as the performance of color -based IPS and VA -type panels. TN panels are soft screen , gently draw will appear similar to the waterlines . Currently viewing angle because the lack of this type of panel display is gradually out of the mainstream market.
Viewing angle Contrast

Here the author from the TN panel look at the advantages and disadvantages detailed explanation . lcd modules TN panel has the advantage of less output grayscale series of liquid crystal molecules deflection fast, easy to improve the response time on the market today 6ms LCD products the following basic uses a TN panel . With the continuous improvement of TN panels , the latest TN panel monitors are no longer as high-speed response at the expense of picture quality, picture quality has been with a simplified version of the monitor with wide viewing angle panel close. Price compared to wide viewing angle panel also has a big gap.

TN panels drawback is as a native 6Bit panels , TN panels can only display red / green / blue color of 64 , the maximum actual colors only 262.144 kinds , and through dithering algorithm , you can let it reach 16.7M colors (8bit color ) but after all, worked out through the IC circuit and natural colors in terms of accuracy and can not be compared to a native , and wide viewing angle panels with native 8bit color , so the transition is better. Plus TN panel to increase the contrast more difficult, the problem is directly exposed color thin , restore poor .

Section 3 IPS panel features resolution

IPS panel features resolution

IPS panels greatest feature is its poles are in the same plane , unlike other LCD models in the upper and lower sides of the electrode , three-dimensional arrangement . OLED Display Since the electrode on the same plane , no matter what state the liquid crystal molecules are always parallel to the screen , the aperture ratio will decrease , reducing the transmission rate , the IPS used in LCD TV with a backlight will need more .

Choice LCD OR Plasma

For a no contact with friends, flat-panel TVs , flat-panel TV before buying also typically have such a question: " in the end is to buy a LCD TV or Plasma TV? " From now on, LCD TVs and Plasma TVs are flat television pillar products , both have their own strengths , compete with each other ,Character LCD Display and have their own space for development, especially with the gradual popular 3D TV , the two will become more competitive .

Of course, from a technical point of view , there are still some differences between the two . Such as LCD high-definition television images , thinner body , look more stylish appearance ; plasma in brightness, color , layering , and so has certain advantages. In LCD and plasma performance synchronous upgrade stage, we still have to choose according to their needs , after all, is the best fit . If you're a hardcore enthusiast sporting events , or to vote for a big plate plasma care of yourself aesthetic movement concept, but also pay attention to their energy consumption , after all, is the long-term energy-saving benefits, proposals must be purchasing energy-efficient plasma . If the pursuit of fashion and aesthetic quality , Serial Lcd Display Module it can be in a number of liquid crystal boutique in carefully selected .

LCD screen which is good

A first look at the quality of LCD monitors its panels because of their direct impact on the quality of the viewing screen , and LCD TV panels accounted for more than half the cost of the machine is the impact on the cost of LCD TVs major factor , so to choose a good LCD monitor, it must first choose the right panel . LCD panel LCD monitors can largely determine the brightness , contrast, color , viewing angle and other very important parameter. LCD panel developed very quickly, from three generations of previous years , the rapid development of the four generations, five , and then skip six generations of seven generations, and the updated plan also among eighth-generation panel .

Manufacturers currently produce LCD panels mainly Samsung , LG-Philips, AUO , etc., because of the differences in each level of technology , production of COG LCD Displaypanel is also divided into different types of models . Common with TN panel , MVA and PVA panels , etc. Class VA , IPS panels and CPA panel .

TN panels

TN all called Twisted Nematic ( twisted nematic ) panels, low production costs so 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 displayed colors 16.2 M colors, 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.TFT Lcd Modules Many Taiwanese panel manufacturers TN panels , TN panels are soft screen , gently draw will appear similar to the waterlines .

VA class panel

VA class high-end LCD panels 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.

What is the number of colors

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 .

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.

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 .

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 .

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 .

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 .

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.

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 .

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.

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.

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.

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 .

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.

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.).

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 .

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 .