Mobile Phone LCD Screen Quality Control Expert

LCD viewing angle problem

by:Kimeery     2021-08-31
The proper distance for normal viewing is 18 inches or 20 inches. The big screen will have a completely different perspective. This viewing angle means that it is impossible to do it-it is impossible to achieve exactly the same brightness for each color and each point. Because the color is composed of the three primary colors of R/G/B, when the viewing angle increases, it is difficult to keep each color stable, so the difference in brightness consistency of different viewing angles will cause color distortion. Many efforts have been made to compensate for this instability. Let's first understand the principle of how to improve. For liquid crystals, there are different optical paths under different viewing angles. What we want to do is to make the optical paths at different viewing angles the same, that is, to make the polarization planes of the light waves at different viewing angles the same, to get a uniform display. The specific implementation is to construct a structure complementary to the TN type and the arrangement of the TN type in tandem. As shown in the figure, the combination of a left-handed twisted type and a right-handed twisted type can compensate each other and eliminate the viewing angle problem. However, the interface between the upper layer and the lower layer cannot be thinned indefinitely. It is composed of two layers of glass, and the mobile LCDscreen cannot be thickened without adding layers. When it works, it must travel a long distance, and it must pay a great price to benefit from it. Obviously, this approach is not feasible.
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