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Method for manufacturing liquid crystal alignment film, liquid crystal alignment film, and liquid crystal display element

A technology of liquid crystal alignment film and manufacturing method, which is applied in the field of liquid crystal alignment film manufacturing method, liquid crystal alignment film manufacture, liquid crystal alignment film and liquid crystal display element, and liquid crystal display element, and can solve problems such as inability to rub and realize liquid crystal alignment , to achieve high efficiency

Active Publication Date: 2014-07-30
NISSAN CHEM IND LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the rubbing method of rubbing the surface of the liquid crystal alignment film made of polyimide or the like, generation of dust and static electricity may become a problem
In addition, due to the high-definition of liquid crystal display elements in recent years, the unevenness caused by the electrodes on the corresponding substrate or the switching active elements for liquid crystal driving, it is sometimes impossible to rub the surface of the liquid crystal alignment film uniformly with a cloth, and it is impossible to Achieving Uniform Liquid Crystal Alignment

Method used

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  • Method for manufacturing liquid crystal alignment film, liquid crystal alignment film, and liquid crystal display element
  • Method for manufacturing liquid crystal alignment film, liquid crystal alignment film, and liquid crystal display element
  • Method for manufacturing liquid crystal alignment film, liquid crystal alignment film, and liquid crystal display element

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Embodiment

[0120] Embodiments of the present invention will be described in more detail with examples given. However, the present invention should not be construed as being limited thereto.

Synthetic example 1

[0122] 4'-(6-bromohexyloxy)biphenyl-4-ol was synthesized by heating 4,4'-biphenyldiphenol and 1,6-dibromohexane under alkaline conditions. This product was reacted with lithium methacrylate to obtain 2-(4'-hydroxybiphenyl-4-yloxy)hexyloxymethacrylate. Next, 4-methoxycinnamoyl chloride was added under basic conditions to synthesize a compound represented by the following formula (9).

Synthetic example 2

[0124] 4-(6-hydroxyhexyloxy)cinnamic acid was synthesized by heating 1-hydroxycinnamic acid and 1-hydroxy-6-hexanol under alkaline conditions. This product is reacted with methacryloyl chloride under basic conditions to obtain a compound represented by the following formula (10).

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Abstract

Provided are a method for manufacturing a liquid crystal alignment film for enabling highly efficient anisotropy to be introduced into a film without rubbing, as well as a liquid crystal alignment film and a liquid crystal display element. A method for manufacturing a liquid crystal alignment film having [I] a step for forming, on a substrate, a photosensitive side-chain polymer film exhibiting liquid crystal properties in a predetermined temperature range, [II] a step for irradiating polarized ultraviolet rays to the side-chain polymer film, and [III] a step for heating the side-chain polymer film irradiated with the ultraviolet rays, the method being characterized in that the amount of irradiated ultraviolet rays in step [II] is within 1%-70% of the amount of irradiated ultraviolet rays that maximizes the difference [increment]A between the ultraviolet absorbance in the direction parallel to the polarization direction of the polarized ultraviolet rays and the ultraviolet absorbance in the direction perpendicular thereto in the side-chain polymer film.

Description

technical field [0001] The present invention relates to a method for manufacturing a liquid crystal alignment film, a liquid crystal alignment film, and a liquid crystal display element, in particular to a method for manufacturing a liquid crystal alignment film used in a liquid crystal display element, a liquid crystal alignment film obtained by the manufacturing method, and a liquid crystal alignment film using the liquid crystal alignment film. Film liquid crystal display element. Background technique [0002] Liquid crystal display elements are well known as light-weight, thin, and low-power-consumption display devices, and in recent years they have been used in large-scale television sets and the like, 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 having electrodes. Then, in a liquid crystal display element, an organic film made of ...

Claims

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Application Information

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IPC IPC(8): G02F1/1337C08F20/30
CPCC08F220/303G02F1/133711G02F1/133788G02F1/133715B05D3/0254B05D3/065C08F220/18C08J5/18C08J7/123
Inventor 后藤耕平川月喜弘近藤瑞穗安藤昌幸北川大桂夫椿幸树
Owner NISSAN CHEM IND LTD
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