The function of lcm liquid Crystal display Module

- Sep 28, 2019-

The visual angle of folding visible angle liquid crystal is a headache. When the backlight source passes through the polarizer, liquid crystal and orientation layer, the output light has directivity. That is to say, most of the light is emitted vertically from the screen, so when you look at the LCD from a larger angle, you can't see the original color, or even all white or all black. In order to solve this problem, manufacturers have also begun to develop wide-angle technology. So far, there are three popular technologies: tn film,ips (in-plane-switching) and mva (multi-domain vertical alignment). Tn film technology is to add a wide angle of view compensation film on the basis of the original. This layer of compensation film can increase the visual angle to about 150 degrees, which is a simple and feasible method and is widely used in liquid crystal display (LCD). However, this technology does not improve contrast and response time and other performance, tn film may not be the best solution for manufacturers, but it is the cheapest solution, so most Taiwanese manufacturers use this method to build 15-inch liquid crystal displays. Ips (in-plane-switching, intra-board switching) technology, which claims to make the upper and lower visual angles up and down to 170 degrees. Although IPS technology increases the visual angle, using two electrodes to drive liquid crystal molecules needs to consume more electricity, which will increase the power consumption of liquid crystal displays. In addition, the response time of this method to drive liquid crystal molecules is relatively slow. Mva (multi-domain vertical alignment, multi-region vertical arrangement) technique is based on the principle of adding protrusions to form multiple visual regions. The liquid crystal molecules are not completely vertically arranged at static time, and the liquid crystal molecules are arranged horizontally after the voltage is applied, so that the visual angle can be increased to more than 160 degrees by MVA technique, and the response time is shorter than that of ips and tn film. The technology was developed by Fujitsu, which is currently licensed to use Qimei in Taiwan (a subsidiary of Qimei in the mainland) and Taiwan Youda. The vx2025wm of Youpai is the representative work of this kind of panel, which has a horizontal and vertical visual angle of 175 degrees, basically no visual dead angle, and also promises no bright spot. The visual angle is divided into parallel and vertical visual angles, and the horizontal angle is centered on the vertical central axis of the liquid crystal, moving to the left and right, so that the angle range of the image can be clearly seen. The vertical angle is centered on the parallel central axis of the display screen, moving up and down, and the angle range of the image can be clearly seen. The visual angle is in the unit of "degree". At present, the commonly used marking form is to directly mark the total horizontal and vertical range, such as: 150 °120 degrees, and the lowest visual angle is 120 °100 degrees (horizontal / vertical). Below this value, it is unacceptable, and it is best to reach 150 °120 degrees. There are two main types of classified liquid crystal modules, one is color liquid crystal, the other is monochromatic liquid crystal. Among them, monochromatic liquid crystal is divided into monochromatic graphic lattice LCD screen, monochromatic character lattice LCD screen, monochromatic custom pen segment LCD screen. Folding editing this section of the application of liquid crystal module applications: power measurement and control terminal, injection molding machine computer, CNC system, man-machine interface, medical instruments, biochemical analysis, textile machinery control, tax control computer, lottery machine, food detection, chromatographic analysis, electronic measurement, environmental experimental equipment, fire safety, automotive electronics and data acquisition and other fields. What you might be interested in