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Alignment agent, diamine compound, alignment film, and liquid crystal display element

A technology of amine compounds and alignment agents, applied in the direction of liquid crystal materials, organic chemistry, chemical instruments and methods, etc., can solve problems affecting yield, static electricity, fine dust or uneven orientation, etc.

Active Publication Date: 2021-05-11
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the past, the industry mostly used the method of brush film to make the alignment film have the orientation ability, but the rubbing method often affected the yield rate due to static electricity, dust, or uneven orientation generated during friction; and then developed the use of polarized light to A non-brush film orientation technology that irradiates the alignment film in a specific direction to make the alignment film produce alignment ability

Method used

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  • Alignment agent, diamine compound, alignment film, and liquid crystal display element
  • Alignment agent, diamine compound, alignment film, and liquid crystal display element
  • Alignment agent, diamine compound, alignment film, and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～20 and comparative example 1～2

[0107] Dissolve the above-mentioned polymer in N-methyl-2-pyrrolidone, ethylene glycol monobutyl ether and other solvents according to the weight percentages shown in the following Table 4 to prepare a solution with a solid content of 6% by weight and measure it with a diameter of 1 micron filter, and the collected filtrate is the alignment agent of the present invention.

[0108] Table four

[0109]

[0110] The alignment agents of the above-mentioned examples and comparative examples were applied on the patterned transparent electrode substrate by means of a spin coater, dried at 90°C / 120 seconds, and cured at 230°C / 30 minutes to form a layer with a thickness of the orientation film. The film was photo-aligned with linearly polarized light incident at an angle of 50 degrees from the normal direction of the film, with a wavelength of 313 nm and an exposure energy of 20 mJ to form a liquid crystal alignment film.

[0111] Afterwards, coat the sealant on the substrate of ...

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Abstract

An alignment agent comprises a first polymer, the first polymer comprises a side chain structure, the side chain structure comprises piperazinyl and a structure shown in the formula (1), the tail end of the side chain structure is a monovalent organic group with alignment force, and in the formula (1), ring A is a divalent organic group containing at least one aromatic ring.

Description

【Technical field】 [0001] The present invention relates to an alignment agent, a diamine compound, an alignment film and a liquid crystal display assembly, and in particular to an alignment agent containing a piperazine-based structure, an alignment film containing the alignment agent, and a liquid crystal display assembly containing the alignment film . 【Background technique】 [0002] In a liquid crystal display (liquid crystal display), an alignment (alignment, alignment) film can align liquid crystal molecules into a uniform pre-tilt angle (PTA) orientation. Therefore, the control of the pretilt angle is very important in the liquid crystal display. The liquid crystal display without pretilt angle is not only prone to abnormalities such as poor alignment and black dots during driving, but also has the problem of longer liquid crystal response time (RT), which are key factors affecting display quality. For example, Multi-domain Vertical Alignment (MVA) displays use protru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56C07D295/135G02F1/1337
CPCC09K19/56C07D295/135G02F1/133711G02F1/133723G02F1/133719
Inventor 王柏扬林冠铭徐硕鸿张嵇集卢厚德
Owner DAXIN MATERIALS
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