Production method of PSVA liquid crystal panel

Abstract

The invention provides a production method of a PSVA liquid crystal panel. A material for forming an alignment film comprises a polyimide polymer, molecules of the polyimide polymer comprise polymerizable reaction groups of polyimide main chains and side chains, and the reaction groups on the side chains of the polyimide polymer in the alignment film can generate polymerization reaction by virtue of once ultraviolet irradiation, namely the alignment of liquid crystal molecules can be realized; compared with existing production methods of the PSVA liquid crystal panel, reaction monomers with pretilt angles are produced from the liquid crystal molecules by virtue of polymerization, are taken as side chain groups to be directly grafted to a main body material of the alignment film to form the reaction groups on the polyimide polymer but to be not mixed into a liquid crystal material, and no free reaction monomer exists in a liquid crystal layer, so that a second ultraviolet irradiation procedure does not need to be carried out to eliminate the reaction monomers mixed in the liquid crystal layer, meanwhile, the problems of drop Mura, broken spots and the like of the liquid crystal panel are avoided, and therefore, the production cost is lowered, and the quality of the liquid crystal panel is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a method for manufacturing a PSVA liquid crystal panel. Background technique [0002] Thin Film Transistor-Liquid Crystal Display (TFT-LCD) occupies a mainstream position in the current flat panel display field due to its advantages of high color, small size, and low power consumption. As far as TFT-LCD display panels currently on the mainstream market are concerned, they can be divided into three types, namely twisted nematic (Twisted Nematic, TN) or super twisted nematic (Super Twisted Nematic, STN) type, plane switching (In-Plane Switching, IPS) type, and vertical alignment (Vertical Alignment, VA) type. Compared with other types of liquid crystal displays, the VA type liquid crystal display has a very high contrast ratio, and has a very wide application in large-size displays, such as televisions. [0003] Among them, the polymer stabilized vertical alignment (Polymer...

AI Technical Summary

Problems solved by technology

However, in actual production, the second ultraviolet light alignment process takes a long time, usually about two hours, so the energy consumption is relatively high

In addition, the alignment of the liquid crystal material 410 is realized by the reaction of the free reactive monomer 420 in the liquid crystal material 410. During the alignment of the ultraviolet light, the concentration distribution of the free reactive monomer 420 and the intensity of the ultraviolet light will affect the Whether the alignment is good or bad, for example, when the free reactive monomer 420 is unevenly distributed, the liquid crystal panel will have the problem of dripping Mura, that is, there are regularly distributed black spots on the panel, thereby reducing the quality of the panel; When the light intensity is high and the concentration of reactive monomer 420 is high, the reactive monomer will undergo implosion reaction, and the liquid crystal panel will produce broken bright spots when displaying, which will seriously affect the quality of the panel

Images