Selecting method of polaroids for liquid crystal display

Abstract

A selecting method of polaroids for a liquid crystal display includes the steps that a blackness testing instrument LED light source, the first polaroid, a reference checking piece and the second polaroid are placed on a right-angle platform according to the position relation, and the blackness testing instrument LED light source is perpendicular to the reference checking piece and the second polaroid; the second polaroid is rotated so that blackness can reach a specified value, and a line L1 and a line L2 are marked off; whether the two ends of each marked line after being folded in two meet the deviation requirement or not is judged, and if the deviation requirement is met, the second polaroid is cut according to the marked lines. By means of the method, the relative transmittance of the upper polaroid and the lower polaroid before being attached can be detected, it can be guaranteed that the upper polaroid and the lower polaroid which are consistent in blackness are attached to the same liquid crystal display, and therefore the blackness color number changing range of the produced liquid crystal display product is within 0.5 color number.

Description

technical field [0001] The invention relates to the technical field of liquid crystal displays, in particular to a method for selecting polarizers for liquid crystal displays. Background technique [0002] Common liquid crystal products in the field of liquid crystal display technologies include liquid crystal displays, liquid crystal light valves, etc., wherein liquid crystal displays are one of the commonly used electronic products. As we all know, the imaging of liquid crystal displays must rely on polarizers. The basic structure of liquid crystal displays is as follows: figure 1 As shown, it includes upper glass substrate 1, COM electrode 2, upper polarizer 3, lower glass substrate 4, SEG electrode 5, liquid crystal layer 6 and lower polarizer 7, the upper polarizer is closely attached to the upper glass substrate, and the lower polarizer attached to the lower glass substrate. When the optical axes of the two polarizers are parallel, the luminous flux is the largest, w...

AI Technical Summary

Problems solved by technology

If any polarizer is missing in the production process of the LCD, the LCD will not be able to display images

[0003] Similarly, the liquid crystal light valve is also inseparable from the polarizer, and the liquid crystal light valve has higher requirements on the polarizer than the general display device; Injury to the operator's eyes

[0004] However, in the components used in the production of liquid crystal display products, the polarization axes of the polarizers are not necessarily consistent. However, there are differences in the blackness, viewing angle and blackness consistency of the produced liquid crystal display products, which cannot meet the quality requirements of the products.

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