TFT LCD is indeed a component

TFT LCD Displays control means using the liquid crystal pixel TFT LCD screen, which is most commonly used in many LCD category. TFT LCD is indeed a component that is often said that the LCD components, mainly by the LCD panel, backlight, all film, the ranks of the drive circuit and the timing control circuit (often called logic board) components. Often said TFT LCD interface refers to the signal input output interface LCD module and motherboard (also known as signal processing board, or signal board) connected to that logic board. In the LCD TV or LCD color monitor, TFT-LCD interface has a TTL (RGB), LVDS, EDP, RSDS, TMDS and other types, of which the first three are used more.

How to choose flat-panel TVs peripheral functions

With the rapid development of today's flat-panel TVs , watching TV is no longer the sole function of the TV. After entering the liquid crystal , plasma era, additional features of the TV even more. In addition to watching TV, DVD, play games, video, recording, Tsingtek OLED Display Module browsing with photos , Internet ...... so a dizzying array of new features coming out on the flat-panel TV .

See this, and some people may get confused by the same author . We buy televisions, mainly to watch TV and DVD, or play the next game consoles connected . Those with cameras , recording, processing photos and browse features flat-screen TVs , for us, in the end it is more practical or flashy it? Not blindly require multiple attachments

Faced with this problem , I believe that the current flat-panel TV has its distinctive features highlights , but for different additional functions corresponding to different consumer groups. For example, now many of my friends like to download movies / dramas on from the network , and then connect the TV to be viewed through a computer , and with access to the Internet network TV appearance , no longer need so much trouble, the TV directly connected to the network , directly enjoy the movie , do not need so much trouble , it is more practical for those who like to watch movies / dramas elderly .

For example, an office worker also football fans , to work on time every day , often miss some exciting football tournament program , which can record function can be a good solution to this problem. But for one do not like the football program , but just watch some TV programs , see the news network of friends, this feature is a little redundant, Tsingtek custom lcd display somewhat superfluous .

Of course , we can not blindly require multiple attachments , the blind pursuit of additional features can pay more money, and get what they need, we want to choose according to their needs .

Buy LCD or Plasma ?

For a flat-panel TV without regular contact with ordinary consumers, prior to purchase flat-panel TV will have a question: " is to buy an LCD TV or Plasma TV is good and what difference does it both ? ? "

From now on, LCD TVs and plasma TVs are the mainstay products in the field of flat-panel TVs , both have their own strengths , competing with each other , have their own space for development , especially with the development of flat panel technology , plasma Resolution reach high standards, bigger and expensive LCD TV , motion picture tailing serious problems have been overcome , the difference is narrowing.

A technical comparison

Of course, from a technical point of view , there are still some differences between the two . Such as high-definition LCD TV image , body thinner, more stylish and beautiful ; Tsingtek 128x64 lcd display plasma in brightness, color , layering , and so has certain advantages. Here we were to look at the technical characteristics of both understanding :

LCD technology principle: a liquid crystal projection display (Liquid Crystal Display, LCD) LCD is a rearward light-emitting fluorescent tubes , then through a set of lenses and turbot backlight module , the light is uniformly transmitted to the front , in accordance with the received video signal , the liquid crystal liquid crystal molecules within the pixel layer of the glass should be arranged relative to which the light is deflected or barrier to be determined .

Plasma Technical principle: the light-emitting principle of plasma display (Plasma Display Panel) PDP is to inject an inert gas or mercury gas in the glass tube , using a voltage mode , the gas generating a plasma effect , emit ultraviolet light, the individual RGB three excitation type fluorescent body have different primary colors visible by using the length of time to generate the excitation of different brightness.

2 , the dynamic contrast resolution

During the discussion , such as whether to buy an LCD TV or plasma TV, a dynamic definition of a contrast is also very important items. General speaking , the dynamic definition refers to the moving image during playback screen resolution , sharpness, dynamic screen presence embodied in the "tail " , the impact of presence and overlapping . This depends mainly on the TV itself, the response rate, response speed should be noted that this concept is generally concerned for LCD TVs .

LCD TVs currently on the market , the response time is generally 4-8 ms encountered rapid screen ( fast motion such as soccer , racing, etc. ) , it will produce smearing . However, with the advent of 100Hz/120Hz even 200Hz/240Hz multiplier technology, smearing improved, but limited by the working principle , trailing difficult to eradicate the problem . For plasma TV , the response speed of up to 2-3 microseconds Tsingtek low temperature 240x128 lcd, 1-3 microseconds with traditional CRT flat , beyond the scope of the human eye can recognize completely negligible .

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 are a hardcore amateur sporting events , or to vote for a big plate plasma care of yourself aesthetic movement concept, but also pay attention to their energy problems , after all, is the long-term benefits of energy-saving , energy-saving recommendations must purchase a plasma . If the pursuit of fashion and aesthetic quality , it can be carefully selected in numerous boutique in LCD .

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 .

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.

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 .

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.

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 .

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 .

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 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.

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.

Learn the LCD splicing wall features a large-screen display

LCD virtue of inherent advantages: ultra-thin thickness, no radiation, no flicker, and quickly became a hot display market, the big screen market occupied a considerable market share. By introducing the LCD large screen splicing own technical characteristics and analysis of the LCD splicing screen in the recent technical and cost breakthroughs in the hope that the majority of users to be able to display the LCD splicing wall have a certain understanding, in the purchase of the LCD When close to the large-screen display wall, lower costs.
Large screen LCD LCD LCD LCD splicing screen imaging modalities decided it includes: a complete right angle, there is no so-called CRT monitors geometric distortion, no CRT monitor electron gun structure of the complex, the volume can be done is small, electric consumption is very low, zero radiation and not blinking. These advantages make the LCD splicing screen in the fastest time gained popularity, and these advantages are all areas of expertise on the user wants to use, but in some technical indicators, LCD liquid crystal mosaic screen inferior to CRT monitors , such as response time, color richness, these shortcomings but also makes professional users on the LCD splicing screen and CRT monitor is difficult to make a choice between. Here we wish to open the lcd modulesplicing screen display in several major performance indicators compared with CRT monitors to see what makes the difference in the end professional users the choice of the LCD display produces hesitation.
Response Time
For this indicator, can be understood as the reaction speed of the input image signal. Is the same point in the panel above, from black to white and white to black from the sum of the time. If the index is too long, then quickly switch the image or video playback will produce "smear" phenomenon, affecting. For CRT monitors, the response time is generally about 1ms, but for now there are represented in terms of the LCD splicing screen, LCD is 80ms or so earlier, the response time is too long is the LCD using the most headaches. However, this problem has been basically solved, and now the latest LCD splicing screen response speed of 25ms or so, although there is a certain gap compared with the CRT, when watching a DVD, you need to display 33 pictures per second, that the response time of less than to 30ms (30ms = 1000/33). As for the play action game is concerned, such as demanding QUAKEIII, if you want to do completely without "smear", the screen should display speed 60 frames per second or more, that the response time of less than 16.6ms to (16.6ms = 1000 / 60). Currently on the market line display manufacturers LG,256x64 oled display BenQ and Samsung have launched a response time of 16ms LCD display products, but for most of the major applications for the Internet, office, data processing and image data for users who appreciate, 25ms response time of the LCD products have been fully able to meet their needs. Therefore, at present the LCD splicing screen manufacturers are also providing support to users of the LCD 16ms response time 8ms response time and support products LCD products.

What is LED

LED is the acronym for Light Emitting Diode LightEmittingDiode , LED applications can be divided into two categories : First, single-tube LED applications, including backlight LED, infrared LED, etc. ; another is the LED display.
The LCD is short for liquid crystal display . It includes a TFT, UFB, TFD, STN and other types of liquid crystal display.
Technically, from the display , LCD is a liquid crystal display , the LED light-emitting diodes is set by the display. LED digital display, each pixel element is a light emitting diode , If the color , usually red light emitting diodes. If the color is generally composed of three primary colors of a small diode large diode. These diodes matrix composed by the real-time digital control display text or images, relatively low cost , large area consisting of imaging . General stations, squares and other public places subtitles cards, open-air digital TV wall are LED .
While the lcd module pixel units are integrated in the same LCD panels which separated out a small box . Through the digital control these tiny squares for imaging , the performance effect is more delicate. LED Advantages: good color , long life, environmental protection is backlighting applications, the color is good , long life, environmental protection is the LED advantage lies. As we all know , LCD itself does not glow, it relies on the backlight will light through the display panel , displaying graphic images. Therefore , backlight LCD TV technology directly affects the image quality .
Conventional liquid crystal display usually CCFL backlight , the cold cathode fluorescent lamps. CCFL has a lot of very nice features, including excellent white light source , low cost, high efficiency , good stability , easy operation . Has been widely used in notebook computers, desktop computers and televisions .
But the CCFL is considered enough green , mercury ; color performance is not only achieve the NTSC 70 % ~ 80% ; for large- size TV screen , CCFL tube voltage and extended height of processing is difficult.
In contrast , LED light-emitting diode as a light source that can provide red , green, blue , green , orange, amber , white and other colors, broader color gamut that can reach 105% of the NTSC color gamut , which for OLED Module TVs color has provided a guarantee .
In addition, LED lifetime is very long service life of up to 100,000 hours , if the boot 5 hours per day basis, a station with LED backlighting LCD TV can be used for nearly 55 years . In addition, it is not mercury, better environmental performance . LED urgent problems facing : cost, technology , light efficiency
LED (Light Emitting Diode) light-emitting diodes, born in the 1960s after being identified as fluorescent tubes , light bulbs and other lighting equipment Terminator . LED light emitting diode , also known as , compared to other light sources , a single LED light dissipation is minimal. From blue to red , LED lights have a variety of colors , there is a special color is white. Our custom as " cool white " and " warm white " two.
LED light source is composed of many semiconductor grid-like composition , each " grid" has an LED semiconductor , LED backlight on the successful implementation of such a light source plane . Planar light source not only excellent brightness uniformity, do not require sophisticated optical design , so that the thickness of the LCD can be thinner , but also has a higher reliability and stability.
Secondly, in terms luminescence lifetime , LED backlight technology is beyond CCFL, CCFL technology is improved. Common basic life CCFL backlight in 30,000 -4 ten thousand hours or so, some of the top CCFL backlight (WCG-CCFL) life of about 60,000 hours. Such frequent use of life even for users, but also to maintain a good few years . The LED backlight life even longer , at this stage has a white LED backlight lifespan up to 100,000 hours, even 24 hours continuous use , its life may be sufficient for five years.

LCD splicing wall

LCD is the most high-end , the best display device , and its excellent performance, has gained wide recognition . LCD splicing wall using the LCD screen as a stitching unit , to overcome the shortcomings of DLP and PDP walls , providing a high performance , flexible mosaic wall .

Of course, due to the current lcd module backlight light products still use cathode tubes (CCFL), across the lamp filament and its header limits the size of the liquid crystal panel , the current fight screen DID LCD screen used in the border width of 11mm still Therefore seam is slightly larger Character LCD Module splicing wall shortcomings, but with the LED backlight technology inputs , this defect will be significantly improved.

Digital Large LCD display wall

( 1 ) digital image processing equipment, digital large screen display system 's core technology products. These products belong to professional equipment, generally called large-screen ,Character LCD Modules multi -screen display , display wall controllers , large screen processors.
( 2 ) large digital large screen display system , including LCD LCD splicing screen digital display system and PDP, DLP and other display systems , these products are widely used in the monitoring center , dispatch centers , command centers , applications distributed across all walks industries such as electricity, telecommunications, transportation, public security systems, military systems , water water , government departments, energy sector , various enterprises ;
( 3 ) Other digital display devices, including large single one projection ( projection projector once or twice a reflective display ) products and systems integration and reinforcement of various military displays, widely used in conference and exhibition, government departments, corporate and military sectors ;
( 4 ) signal transmission / switching equipment, including matrix switchers , splitters, long drive and a signal processor , widely used in various types of AV contractors .
( 5 ) large digital large screen display system software, including large-screen system splicing control program, image processing, control communications procedures, protocols and other four aspects underlying driver . Software can realize the video signal , VGA signal ,Lcd display module remote IP window is displayed on the large display device , so that the signal can roam , overlay and add / toggle various effects , widely used in electric power, telecommunications , transportation, public security system , the military system , irrigation water , government, energy sector , enterprises of all types of large-scale digital large screen display systems.

The working principle of the polarizing film

Nowadays the most common polarizing film is Rand H invention, the sheet 1938 years , which was prepared as follows : First, the chemical activity of a soft rich transparent plastic plate ( usually PVA) immersed in I2 / KI aqueous solution , several within seconds, a lot of iodine ion diffusion penetrate the inner PVA, micro-heat by manual or mechanical stretching until multiple lengths , PVA panels also become narrow and variable-length thin , PVA molecules originally irregularity at any angle distribution , after the tensile force uniformly gradually deflected in the direction of force ,Lcd display module attached to the PVA with the iodide ions with directional, iodide ions to form a long chain . As iodine ions have a good bias effect , it can absorb the light beam parallel to the arrangement direction of the electric field component so that only the vertical direction by the electric field component of the beam , the principle can be manufactured using such a polarizing film .

Type polarizing film used today
Polarizing a wide range of applications , not only can use the LCD as a polarizing material can be used for sunglasses , anti-glare goggles, photographic equipment of the filter , mini lcd module auto headlight glare treatment and the amount of light regulator, there are other polarizing microscope with glasses with special medical

Filter is not versatile

Filter can capture particles in any form, including droplets. Filter material is soft, was porous, somewhat silencer effect. Filters for airflow resistance, there are some current sharing function.

However, no time can holds filter when retaining plate, not when the muffler, nor when the windshield.

Filter with water, the above mixed with water to form a slurry fouling. If the filter material is dense paper or cloth, filter mud paste will soon be dead. For comparison fluffy filter materials, water, the group has captured dust may vary with water droplets into the downwind end of the filter, and then a dry, dust will be re-filled. Sometimes, the filter will not severe enough to drip with water level, but enough to filter trace moisture on the windward side of the dust transported to the leeward side, filters dried, dusts have re-scattering risks.

Test was done on the bag filter dust spray concurrency, filter resistance is not increased. Resistance is unchanged, TFT LCD Display indicating no retain dust, which went? Of course, with the water ran.

Filters are filth of the place, conducive to microbial growth moist, other fungi Fortunately, that encounter "Legionella" (35 ℃, humidity, air conditioning systems), big trouble.

Is to deal with dust filter, although some sound absorption effect, but you can not use assessment methods to investigate the muffler filter. If the user requires muffler or silencer honestly use of specialized equipment, not fought filter idea.

In particular, for large gas turbines and centrifugal compressor inlet filter, replace the filter element may not shut down, if there is no specific silencer, filter indoor work environment will be very bad, the operator would not careful operation .

In addition, you can not use the windshield took filter. Not so strong steel filter, in reality, 128x64 oled there had been a lot of trouble because of the windshield or design errors, and let the fan blowing straight filter, causing the filter examples of non-normal damage. Any time, any form of filters, you can not get it done with a wind deflector.

Important filters only deal with dust, it is not versatile obligation, nor versatile ability.