Alignment film material, making method of alignment film, as well as liquid crystal display panel and making method thereof

Abstract

The invention provides an alignment film material, a making method of an alignment film, as well as a liquid crystal display panel and a making method thereof. The alignment film material disclosed by the invention comprises a polyimide main chain, a plurality of reaction type branch chains connected to the polyimide main chain, and a plurality of non-reaction type branch chains connected to the polyimide main chain. The making method of the alignment film disclosed by the invention is simple in making process, and the alignment film material is used for making the alignment film. According to the making method of the liquid crystal display panel disclosed by the invention, the alignment film is prepared according to the making method of the alignment film, the making process of adding reaction monomers to liquid crystal molecules is omitted, the making process of alignment of liquid crystals is simplified, reaction monomers which do not incompletely react are prevented from remaining in the liquid crystal molecules, and the quality of the panel is improved; and the made alignment film generates a uniform polymer network on a UV illumination rear surface, the alignment effects of the liquid crystals are promoted, and the angular field of the panel is extended. The liquid crystal display panel and the alignment film disclosed by the invention adopt the alignment film materials, so that the alignment effects of the liquid crystals are good, and good display quality is obtained.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an alignment film material and a method for manufacturing the alignment film, a liquid crystal display panel and a method for manufacturing the same. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizont...

AI Technical Summary

Problems solved by technology

[0007] However, reactive monomers in liquid crystals can cause various problems: (1) after UV light irradiation occurs free radical polymerization, more or less part of reactive monomers will remain in liquid crystals, thus Pollution of the liquid crystal, leading to the appearance of residual image; (2) The uniformity of the polymer formed by the polymerization of the reactive monomer on the surface of the substrate is also poor, which will lead to poor alignment of the liquid crystal, thereby reducing the quality of the panel; (3) In the PSVA panel During the preparation process, it is necessary to use UV light to irradiate the panel for a long time to eliminate residual reactive monomers, which leads to a long process time and high production costs;

[0008] In order to solve the above problems, a surface-controlled vertical alignment (SCVA, Surface-controlledVertical Alignment) technology has been developed. By physically mixing reactive monomers into the polyimide precursor solution, the liquid crystal can be produced in a predetermined way. The purpose of the tilt angle, but this technology will make the residual reactive monomer in the polyimide diffuse into the liquid crystal, contaminate the liquid crystal, cause the afterimage of the panel to appear, and reduce the quality of the panel

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