Preparing method of alignment film, displaying panel and displaying device

Abstract

The invention discloses a preparing method of an alignment film, a displaying panel and a displaying device. The preparing method of the alignment film comprises the steps of coating a segmented copolymer solution of polyimide on a displaying basal plate, wherein the segmented copolymer is polymerized by two or more kinds of polymers with different polarities; controlling the segmented copolymer to conduct self-assembly in sequence on the displaying basal plate to form a multilayer alignment layer which is layered by various polymers, wherein the polarity of the alignment layer on each layer decreases progressively according to a sequence in which the distances of the alignment layers to the displaying basal plate are from near to far. According to the preparing method of the alignment film, the multilayer alignment film which has a remarkable layered interface can be obtained, the technique is simple, problems of a complex technique and easy introduction of ion impurities brought by using a layer-by-layer preparation to prepare a multiple alignment layer are avoided, in addition, the polarity of the alignment layer on each layer decreases progressively according to the sequence in which the distances of the alignment layers to the displaying basal plate are from near to far, thus preventing the ion impurities in the displaying basal plate from entering a liquid crystal layer.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for manufacturing an alignment film, a display panel and a display device. Background technique [0002] The problem of image sticking has always been one of the important problems affecting the picture quality of a liquid crystal display (Liquid Crystal Display, LCD). An important factor that causes afterimages is the presence of ionic impurities in the display. Ionic impurities are easily mixed in the liquid crystal, the seal, the color layer of the color filter (CF), and the alignment film in the display screen. Under the action of a DC bias voltage (DC bias), the color layer forms a vertical DC electric field with the COM electrode or the pixel electrode on the array substrate side. The electric field will adsorb various ion impurities entering the liquid crystal layer to the alignment film, forming a residual DC bias and causing afterimages. [0003] The color f...

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Problems solved by technology

[0005] Embodiments of the present invention provide a method for manufacturing an alignment film, a display panel, and a display device, to solve the problem in the prior art that the layered alignment film formed by one-step coating and film formation cannot be completely layered, and the formed The alignment film cannot prevent the afterimage caused by ionic impurities in the liquid crystal layer

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