Home >lcd panel > LCD Complete Guide to Purchasing
LCD Complete Guide to Purchasing
2011-12-15 by seoer1

LCD (Liquid Crystal Display LCD) by virtue of the inherent advantages: slim body, no radiation, no flicker, quickly became a hot display market, accounting for a considerable market share. Hopes to introduce the technical characteristics of the China LCD module itself and analysis of LCD technology and cost in recent breakthroughs, so that readers, particularly in the field of graphic images of professional readers, LCD monitors can have a certain understanding, look at the big screen now LCD monitors have been met with their needs and purchase a certain amount of skill.

The so-called "liquid crystal" is a special polymer, the physical state between solid and liquid crystal, which not only has a solid-state optical properties of crystals, but also has the mobility of the liquid. This so-called optical properties of solid crystals is, when light passes through the liquid crystal molecules, the direction will change; so-called liquid flow refers to the location of liquid crystal molecules is not fixed, electric or magnetic fields in the liquid crystal molecules intervention the orientation can be changed. LCD monitor in accordance with the order of development time can be divided into three categories: twist nematic (TN, Twisted Nematic), super-twist nematic (STN, Super Twisted Nematic) and thin-film transistor (TFT, Thin Film Transistor .) TFT which is developed in the 1990s after a color LCD, because each pixel can be controlled independently of the technical indicators should make it far more than previous generations of LCD, and now all of the LCD display are uses TFT technology. Here we are talking about is a TFT LCD display are class LCD. Determined by imaging the LCD display it has: full right angle, there is no CRT monitors in the so-called geometric distortion, no CRT monitors in the complex structure of the electron gun, the volume can do very small, very low power consumption, zero emission and do not flicker, etc.. These advantages make the LCD in the fastest time to be popular, but these advantages are also in all the fields on the user wants to use, but in some technical indicators, LCD display inferior to CRT's, such as response time, abundance of colors, these shortcomings and allows professional users between the LCD and CRT monitors difficult to make a choice. Here we may wish to LCD monitor display in the main performance indicators compared with the CRT monitor and see the difference in the end what makes the professional user the choice of the LCD monitor produced a hesitation.

Response time for this indicator can be interpreted as the input image signal reaction speed. Is the same point in the panel above, from black to white and white becomes black from the total time. If the target is too long, then quickly switch or video image will have a "smear" phenomenon, affecting. For CRT monitors, 1ms response time is generally about, and for the LCD display is concerned, the early LCD in about 80ms, the LCD response time is too long to use the most headaches. However, this problem has been basically solved, and now the latest in LCD 25ms response time is about, although there is a gap compared with CRT, watching the DVD, you need to display 33 images per second, that the response time of less than 30ms can (30ms = 1000/33). As for the play action game is concerned, such as demanding QUAKEIII, if you want to be completely "smear", the screen displays the speed should be above 60 frames per second, that the response time can be less than 16.6ms (16.6ms = 1000/60). First-line display on the market vendors LG, BenQ and Samsung have launched a response time of 16ms LCD panelproducts, but for most of the major applications for the Internet, office, data processing and image data of the users to enjoy, 25ms response time LCD products have been fully able to meet their needs. Thus, the major display manufacturers are also providing support to the LCD 16ms response time 25ms response time and support products for LCD products.

The number of colors the number of colors, refer to the number of colors the display can show, the higher the index, the more abundant the screen. In addition to response time than the other affected professional users to buy a LCD monitor is an important reason may be the number of colors, and now the basic CRT monitors can display 32-bit color, that is, 232 kinds of colors, 4294967296. Early, LCD can only achieve 16-bit color, about sixty-five thousand kinds, and recent period, as technology advances LCD can display up to have about 24-bit color, some 1,600 million. If you just from the indicators, LCD is still some distance away from the CRT, but in fact speaking, $ 16 million colors also meet the needs of most applications. Technology for enhanced color performance in R & D, LG's Kofi technology (ColoriFic) unique, Kofi technology (ColoriFic) by adjusting the applied voltage interval for the color change is more consistent, and the separation of the signal transmission, the signal to enter the LCD After the display, while continuing the process of transmission, horizontal and vertical signals are clearly separated signals to form a two-signal channel. Is separated signal is transmitted to the LCD panel when dealing with more accurate, so the color purity and clarity to be effectively improved. In addition, Curphey technology (ColoriFic) with built-in color, brightness, contrast and sharpness combined display mode such as Office, Internet, movies, etc., for the user to easily select, and also supports a variety of printing devices WYSIWYG The true color output. Philips recently introduced digital display light of new technologies, mainly from the brighter aspects, but also support for sharpness, contrast and color adjustment.

Viewing Angle LCD and CRT display screen, there is still a shortcoming, which is tilted at an angle if the user will not see the image on the screen. For this early use of laptop computer users must have some experience, using a laptop computer, to face the screen image is clear, if the tilt angle to a certain point will not see the screen image. Up to what point can see the screen image, this point is the viewing angle. Viewing angle can be divided into horizontal viewing angle and vertical viewing angle. For this shortcoming, LCD manufacturers have made the development of a great effort, and now the LCD viewing angle can reach 140 degrees, in fact, actually no one to look at the screen so the angle of tilt. For professional users, the majority is always facing the screen. As for resolution, brightness, contrast in terms of these indicators, LCD monitors and CRT monitors are basically the same. If the LCD monitor in the technical indicators can fully accept that the only consideration is price, just a year ago, the price of large LCD screen is unacceptable, the hundreds of million, and now with the LCD mass production, cost reduction, LCD has come to a reasonable price, and to 17-inch LCD monitor, it is now cost about 4,500 yuan, here we should not ignore a problem that LCD monitors unlike CRT monitors effective display area, as there is one that, effective 17-inch LCD monitor display area is 17 inches, and this 19-inch CRT monitor with an effective display area is basically the same. Now 19-inch CRT market price of about 3,000 yuan, the gap between 1,500 yuan, which is 1500 yuan in exchange for zero radiation, flicker-free screen, the need for a long time fixed on the screen, the graphics / video design, publishing and other professional field in terms of users and how to enjoy it! In addition to these indicators, the selection must be carefully selected large-screen LCD display, calmly, first select the brand high-profile products. Excellent brand by large-scale LCD panel plant as the background, as the LCD components the most important part of the LCD panel, has been the decision of LCD quality and price and other factors key, advanced and reliable panel production line in support, product quality and integrated services can be guaranteed natural.

  keywords:lcd panel