Method for producing substrate having liquid crystal orientation membrane for use in in-plane-switching liquid crystal display element

A group and alkyl technology, which is applied in the field of manufacturing liquid crystal display elements with excellent afterimage characteristics, can solve problems such as static electricity, dust generation, and inability to rub the liquid crystal alignment film evenly

Active Publication Date: 2016-03-02
NISSAN CHEM IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the brushing method of rubbing the surface of a liquid crystal alignment film made of polyimide or the like has problems of generating dust and static electricity.
In addition, due to the high-definition of liquid crystal display elements in recent years, the unevenness

Method used

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  • Method for producing substrate having liquid crystal orientation membrane for use in in-plane-switching liquid crystal display element
  • Method for producing substrate having liquid crystal orientation membrane for use in in-plane-switching liquid crystal display element
  • Method for producing substrate having liquid crystal orientation membrane for use in in-plane-switching liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0294] [Preparation of polymer composition]

[0295] The polymer composition used in the present invention is preferably prepared in the form of a coating liquid so as to be suitable for forming a liquid crystal aligning film. That is, the polymer composition used in the present invention is preferably prepared in the form of a solution in which a resin component for forming a resin coating is dissolved in an organic solvent. Here, the resin component refers to a resin component containing the above-mentioned photosensitive side chain type polymer capable of expressing liquid crystallinity. In this case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.

[0296] In the polymer composition of this embodiment, the above-mentioned resin components may all be the above-mentioned photosensitive side-chain polymers capable of exhibiting liquid crystallinity,...

Embodiment

[0390] The methacrylic monomers MA1 and MA2 used in Examples are shown below.

[0391] In addition, MA1 and M2 were respectively synthesized as follows. That is, MA1 was synthesized by the synthesis method described in the patent document (WO2011-084546). MA2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).

[0392]

[0393] Crosslinking agents T1 to T14 used in Examples are shown below.

[0394] In addition, T1-T14 were synthesize|combined by the method shown below.

[0395] T1: diethoxy(3-glycidyloxypropyl)methylsilane (manufactured by Tokyo Chemical Industry Co., Ltd.).

[0396] T2: Tetraethoxysilane (manufactured by Tokyo Chemical Industry Co., Ltd.).

[0397] T3: N,N,N',N'-TETRAGLYCIDYL-4,4'-DIAMINODIPENYLMETHANE (N,N,N',N'-tetraglycidyl-4,4'-diaminodiphenylmethane, Aldrich system).

[0398] T4: Butanetetracarboxylic acid tetrakis(3,4-epoxycyclohexylmethyl) modified ε-caprolacton...

Synthetic example 1

[0418] After dissolving MA1 (9.97 g, 30.0 mmol) in THF (92.0 g) and degassing with a diaphragm pump, AIBN (0.246 g, 1.5 mmol) was added and degassed again. Then, it was made to react at 50 degreeC for 30 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to diethyl ether (1000 ml), the resulting precipitate was filtered, washed with diethyl ether, and dried under reduced pressure in an oven at 40°C to obtain methacrylate polymer powder (A1) .

[0419] NMP (29.3g) was added to the obtained methacrylate polymer powder (A1) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. NMP (24.7g) and BC (40.0g) were added and stirred to this solution, and the methacrylic polymer solution M1 was obtained.

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Abstract

The present invention provides an in-plane-switching liquid crystal display element which exhibits excellent burn-in properties and efficiently controls orientation. To this end, the present invention provides a polymer composition containing: (A) a photosensitive side-chain polymer which exhibits liquid-crystal properties within a prescribed temperature range; (B) a cross-linking compound having, per molecule, two or more groups of at least one type of substituent group selected from a hydroxy group, a hydroxyalkyl group, an alkoxy group, an alkoxy-alkyl group, an oxirane group, an epoxy group, an isocyanate group, an oxetane group, a cyclocarbonate group, a trialkoxysilyl group, and a polymerizable unsaturated bond group; and (C) an organic solvent. Specifically, the present invention provides a method which makes it possible to produce a substrate having a liquid crystal orientation membrane, and to obtain a liquid crystal orientation membrane for use in an in-plane-switching liquid crystal display element having the ability to control orientation, by having the following steps: [I] a step for forming a film by applying said composition onto a substrate having a conductive film for in-plane switching; [II] a step for irradiating the film obtained in [I] with polarized ultraviolet rays; and [III] a step for heating the film obtained in [II].

Description

technical field [0001] The present invention relates to a method for manufacturing a substrate having a liquid crystal alignment film for a transverse electric field drive type liquid crystal display element. More specifically, it relates to a new method for producing a liquid crystal display element excellent in image sticking characteristics. Background technique [0002] Liquid crystal display devices are known as display devices that are light in weight, thin in cross-section, and low in power consumption. In recent years, they have been used in large-scale television applications, etc., and have achieved remarkable development. The liquid crystal display element is constituted, for example, by sandwiching a liquid crystal layer between a pair of transparent substrates provided with electrodes. Also, in a liquid crystal display element, an organic film containing an organic material is used as a liquid crystal alignment film to make liquid crystals exhibit a desired ali...

Claims

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Application Information

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IPC IPC(8): C09K19/38C08F20/30C08L101/02G02F1/1337
CPCC08F20/30C08F120/30C09K19/062C09K19/2014C09K19/322C09K19/52C09K2019/0448C09K2019/122C09K2019/2035C09K2019/2042C09K2019/3422C09K2019/3425G02F1/133788G02F1/134363
Inventor 川野勇太名木达哉根木隆之金尔润川月喜弘近藤瑞穂
Owner NISSAN CHEM IND LTD
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