The LCD screen is divided into LCD black and white screen and LCD color screen. These two screens have their own characteristics, and the display effect and price are different. Because it determines the customer to choose the LCD screen, consider the cost performance. According to statistics, the world wide application LCD Screen, or belong to LCD black and white screen (TN, HTN, STN, FSTN, VA), the following describes the LCD black and white screen:
The difference between black and white LCD screen and color LCD screen is that the color LCD screen is based on one or three primary colors for color change and the black and white LCD screen color is relatively simple, so many places in life can use color LCD screen, facing the electronic In the development of the screen field market, many kinds of LCD liquid crystal screens have also received people's attention, but the black and white LCD screen still plays its own big role in people's line of sight, so now there are still various aspects of life. Many black and white LCD screens can be seen. Now the black and white LCD screen has a large market share, because its production method is relatively easy, and the cost is not too high. And through the development of modern technology, the current black and white LCD screen surface It is more wear-resistant and durable, it can increase the service life to a large extent, because its cost is not too high, and its cost of use is not too high, so many people are very welcome, which is why Simple old-fashioned equipment and electronic calculators, and electronic scales have the same reason for the presence of black and white LCD screens. Mainly because it has such a series of advantages, so that it can continue to shine in the market to provide a series of convenience for people's lives.
Now it may not be visible on many electronic devices, black and white LCD screens, but in fact, black and white LCD screens are still active around people's lives, as long as they can be observed carefully, and precisely because it can be oriented to the mass, consumption level The characteristics make it able to continue to be widely used, but of course it will not be in the same place, it will also develop and progress with the advancement of technology.
Black and white screens can have such a wide range of applications, because their cost performance is relatively high, and many home appliance customers prefer. LCD panels are mainly divided into 2 categories: TN and wide-angle panels. TN-type panel production technology is mature, high yield rate, low price, the disadvantage is that the viewing angle is small, the color can only reach 16.2M color, which is not conducive to color reproduction. The wide-angle panel is divided into IPS panel, MVA panel and PVA panel. The price is very high, but the color can reach 16.7M and the viewing angle exceeds 170 degrees. At present, the display using wide-angle panels in the market is only about 5%, and most of the others are inexpensive TN-type liquid crystal displays.
1, TN panel
The TN panel is based on the relatively mature standard TFT-TN liquid crystal technology, and is widely used in entry-level and low-end liquid crystal displays. Because of its low output gray level, the liquid crystal molecules deflect quickly, making the response time easy. Improve, currently the market for LCD products below 8ms are TN panels. In general, the cheaper price and faster response time are its biggest advantages, but the viewing angle is only 140 degrees, and it is not as good as other high-end panels in color reproduction, because the 16.7M TN panel is 16.2M in color. No substantial change.
2, IPS panel
The biggest IPS panel sometimes has its super-realistic color reproduction capability, but its response time is long and the production cost is high. Therefore, it is mostly used in high-end professional graphics LCD monitors. The famous Apple LCD monitor is used in this category. panel. In addition, the IPS panel has a large viewing angle, which can basically reach the level of the CRT display, and the color display capability reaches 16.7M, but the performance is poor in contrast, response time, black background color and color saturation.
3, MVA panel
MVA panel can be said to be the earliest wide viewing angle technology. Its liquid crystal layer contains a kind of protrusion for liquid crystal molecules to adhere. Under the condition that no voltage is applied, the MVA panel looks just like traditional technology. The liquid crystal molecules are perpendicular to the screen. However, once the voltage is applied, the liquid crystal molecules are attached to the protrusions to form a state perpendicular to the surface of the protrusions. This technique effectively improves the response time and viewing angle of the LCD, and allows the viewing angle to reach 170. Above the degree, the contrast is also greatly improved, and the color display capability reaches 16.7M. Nowadays, this technology is also relatively mature, so the market penetration rate is relatively high. MAYA's white, Philips 190P7 and ViewSonic VX2025wm all use MVA panels.
4, PVA panel
The PVA panel is a derivative of the MVA panel. It uses a transparent ITO layer instead of the protrusions in the MVA liquid crystal molecules, which greatly improves the light transmittance, thereby improving the image quality and greatly improving the display performance. 170 degrees, response time, contrast and color reproduction capabilities have been greatly improved, it can be said that PVA LCD panel has almost no weakness except price. Due to the high production cost, PVA panels are mostly used in LCD TVs and high-end graphics LCDs. For example, Samsung F7 series LCD TVs, Dell 2007WFP and Samsung LA32R71B are still some distances from ordinary consumers (wide-angle technology: one of the parameter indicators on the LCD) The horizontal/vertical viewing angle of the item, the horizontal angle of view of the traditional liquid crystal display is 45 degrees each, which means that the viewer function has a 90 degree angle of view. When the angle between the user and the display is heavy, you will not be able to Seeing the content on the display, this is why many users reflect the distortion or darkness of the picture when running the game or watching the movie on the LCD display. However, the wide viewing angle technology is different, it can increase the viewing angle of the liquid crystal display to 160. Degree or greater to solve the problem of insufficient perspective.)