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Cholesteric liquid crystal polymer alignment layer, preparing method thereof and liquid crystal display panel

A technology of cholesteric liquid crystals and alignment layers, applied in nonlinear optics, instruments, optics, etc., can solve problems such as high difficulty, high process cost, complex manufacturing process of multi-domain thin-film liquid crystal display devices, etc., and the method is simple and easy The effect of the operation

Active Publication Date: 2014-10-08
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the multi-domain thin-film liquid crystal display devices used have the problems of complex manufacturing process, high process cost and great difficulty.

Method used

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  • Cholesteric liquid crystal polymer alignment layer, preparing method thereof and liquid crystal display panel
  • Cholesteric liquid crystal polymer alignment layer, preparing method thereof and liquid crystal display panel
  • Cholesteric liquid crystal polymer alignment layer, preparing method thereof and liquid crystal display panel

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preparation example Construction

[0038] Embodiments of the present invention provide a method for preparing an alignment layer of a cholesteric liquid crystal polymer, comprising:

[0039] 1) forming a conventional alignment layer on the substrate;

[0040] In this step, a conventional alignment material is coated on the substrate, and a conventional alignment layer is formed on the substrate by rubbing. Wherein, the conventional alignment layer may be a rubbing alignment layer or a photo alignment layer. It can be understood that those skilled in the art may select different types of alignment layers according to actual production conditions, which are not specifically limited herein.

[0041] 2) coating a mixture layer formed by mixing binaphthyl diol chiral compound, cholesteric liquid crystal polymerizable monomer and photoinitiator on the conventional alignment layer;

[0042] In this step, a mixture layer is also coated on the conventional alignment layer, and the mixture layer is formed by mixing a b...

Embodiment 1

[0066] Coat the PI alignment layer material on the glass substrate, and make it have a certain alignment direction by rubbing or other methods; Bininadiol chiral compound, cholesteric liquid crystal polymerizable monomer, photoinitiator according to 2.0% / 93.3% / 4.7% mass ratio mixed evenly, the variation curve of the pitch of the mixture with temperature is as follows Figure 10 As shown, among them, the pitch at 30°C is 1000nm; the above-mentioned mixture is coated on the PI alignment layer with a thickness of 125nm, and the operation is protected from light, and the coating is uniform; the use of a mask and the light intensity is 5mw / cm 2 UV light, and irradiate the coated mixture at 30°C for 40 minutes, so that the cholesteric liquid crystal polymerizable monomers in the irradiated part are polymerized to form a cholesteric liquid crystal polymer; The cholesteric liquid crystal polymerizable monomer of light irradiation (that is, unreacted) is removed, thereby forming a lay...

Embodiment 2

[0068] Coating layer PI alignment layer material on the glass substrate, make it have a certain alignment direction by rubbing etc. method; Combine binaphthyl diphenol chiral compound, cholesteric liquid crystal polymerizable monomer, photoinitiator according to 2.0% / 93.3 % / 4.7% mass ratio is mixed evenly, and the variation curve of the pitch of the mixture with temperature is as follows Figure 10 As shown, among them, the pitch at 65°C is 1200nm; the above-mentioned mixture is coated on the PI alignment layer with a thickness of 300nm, and the operation is protected from light, and the coating is uniform; the use of a mask and the light intensity is 5mw / cm 2UV light is used to irradiate the coated mixture at 65°C for 40 minutes to polymerize the cholesteric liquid crystal polymerizable monomer in the irradiated part to form a cholesteric liquid crystal polymer; The cholesteric liquid crystal polymerizable monomer of light irradiation (that is, unreacted) is removed, thereby ...

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Abstract

The invention provides a cholesteric liquid crystal polymer alignment layer, a preparing method of the cholesteric liquid crystal polymer alignment layer and a liquid crystal display panel and belongs to the field of liquid crystal display. Multi-domain liquid crystal display is easily achieved. The method comprises the steps that a general alignment layer is formed on a substrate; the general alignment layer is coated with a mixture layer formed by mixing a binaphthol chiral compound, a cholesteric liquid crystal polymerizable monomer and a photoinitiator; ultraviolet radiation is conducted on the mixture layer through a mask board within a cholesteric temperature range, a polymerization reaction is conducted through the cholesteric liquid crystal polymerizable monomer in an irradiation zone of the mask board, and a cholesteric liquid crystal polymer is generated; the cholesteric liquid crystal polymerizable monomer which is not reacted is removed from the mixture layer, so that the cholesteric liquid crystal polymer alignment layer is generated, wherein the direction of alignment of the general alignment layer and the cholesteric liquid crystal polymer alignment layer is circularly changed at the included angle ranging from 0 degree to 360 degrees. The cholesteric liquid crystal liquid crystal polymer alignment layer and the preparing method of the cholesteric liquid crystal liquid crystal polymer alignment layer can be used for manufacturing the liquid crystal display panel for achieving multi-domain liquid crystal display.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a cholesteric phase liquid crystal polymer alignment layer, a preparation method thereof, and a liquid crystal display panel. Background technique [0002] Liquid crystal displays are used more and more widely in modern life, such as mobile phone display screens, Note Book display screens, GPS display screens, LCD TV display screens, etc. With the advancement of science and technology, the traditional monodomain liquid crystal display has been unable to meet people's requirements for liquid crystal display due to its shortcomings such as low contrast, asymmetric viewing angle, and color shift when viewed from different angles. Multi-domain display technology is currently widely used in the display field because it can improve the viewing angle asymmetry of liquid crystal displays, increase viewing angles, increase contrast, improve grayscale inversion, and effectively improv...

Claims

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Application Information

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IPC IPC(8): G02F1/1347G02F1/137G02F1/1333
Inventor 武晓娟李伟解会杰
Owner BOE TECH GRP CO LTD
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