Optical alignment method of liquid crystal display panel

Abstract

The invention provides an optical alignment method for a liquid crystal display panel. The method comprises: using a UV light intensity detector and an alignment voltage detector to respectively detect actual UV light intensity and actual alignment voltage which make liquid crystal of a liquid crystal display panel of a reference alignment machine reach a target pretilt angle, and according to theactual UV light intensity and actual alignment voltage of the reference alignment machine, adjusting alignment parameters of a to-be-debugged alignment machine, to make the actual UV light intensityand actual alignment voltage of the to-be-debugged alignment machine be same with the actual UV light intensity and actual alignment voltage of the reference alignment machine. The method can reduce differences of the alignment voltage and UV light intensity of the alignment machines, and prevent phenomenon of non-uniform angles of the pretilt angles of the liquid crystal display panels, and improve product process yield.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an optical alignment method of a liquid crystal display panel. Background technique [0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as LCD TV, mobile phone, personal digital assistant, digital camera, computer screen or notebook computer screen, etc. . [0003] Most of the existing liquid crystal displays are backlight liquid crystal displays, which include a housing, a liquid crystal panel disposed in the housing, and a backlight module disposed in the housing. Generally, a liquid crystal panel is composed of a color filter substrate (Color Filter, CF), a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer) filled between the two substrates. , its working principle is to control the rotation ...

AI Technical Summary

Problems solved by technology

In the actual process, the size of the pretilt angle is mainly affected by three factors: alignment voltage (CuringVoltage), alignment time length (Curing Time), and UV light intensity. In different process lines, due to differences in machines, the same The actual alignment voltage and UV light intensity of each machine under the alignment parameters are still different, resulting in uneven pretilt angles of the product, resulting in problems such as broken bright spots on the LCD panel, and reducing the product process yield.

Images