Liquid crystal alignment agents for photo-alignment, liquid crystal photo-alignment layers, and liquid crystal displays using the same

A liquid crystal alignment agent, the technology of making tetracarboxylic dianhydride, applied in liquid crystal materials, optics, nonlinear optics, etc., can solve the problems of reduced response speed of liquid crystal display elements, burn marks, and reduced brightness of liquid crystal display elements
CN102585843AActive Publication Date: 2012-07-18长沙道安捷新材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
长沙道安捷新材料有限公司
Publication Date
2012-07-18

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Abstract

The invention provides liquid crystal alignment agents for photo-alignment, liquid crystal photo-alignment layers, and liquid crystal displays using the same. The liquid crystal alignment agents contain tetracarboxylic dianhydride mixture including cyclopentane tetracarboxylic dianhydride, which is reacted with specific diamine to obtain polyamide acid or its derivatives. The liquid crystal alignment agents are applied to form a photo-alignment film with excellent alignment property and high light transmittance, because of light sensitivity of the chemical change caused by illumination. In addition, the photo-alignment film is applied in liquid crystal displays, the electrical characteristics required by liquid crystal alignment film is satisfied, the voltage maintaince ratio is high, the iron amount is little, the remained charge amount is little, etc.
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Description

technical field

[0001] The invention relates to a liquid crystal alignment agent for photo-alignment using a photo-alignment method, a photo-alignment film and a liquid crystal display element using the same. Background technique

[0002] In various display devices such as monitors of personal computers, LCD TVs, view finders of video cameras, projection displays, and other optical printer heads Among optoelectronic-related components such as optical Fourier transform components and light valves, nematic liquid crystals are the mainstream of liquid crystal display components that have been commercialized and generally distributed. display components. The display modes of nematic liquid crystal display elements are widely known as TN (Twisted Nematic, twisted nematic) mode and STN (Super Twisted Nematic, super twisted nematic) mode. In recent years, in order to improve the narrow viewing angle, one of the problems of these modes, a TN-type liquid crystal display element usi...

Claims

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