Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display unit

A liquid crystal alignment agent and group technology, applied in liquid crystal materials, instruments, optics, etc., can solve the problems of halftone brightness inversion, narrow viewing angle of visual recognition image, reduced brightness or contrast, etc., and achieve the effect of low residual DC
CN102154018AInactive Publication Date: 2011-08-17JNC CORP +1
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
JNC CORP
Publication Date
2011-08-17
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display unit. The liquid crystal aligning film with less residual DC can be obtained through the liquid crystal aligning agent containing following polyamide acids which is obtained from diamines represented by the formula (P) or from reaction between mixture of diamines represented by the formula (P) and other diamines and tetracaboxylic dianhydride. Moreover, the liquid crystal display unit without burn-in can be obtained through the liquid crystal aligning film. Ring P is pyridine-2, 5-diyl, pyridazine-3,6-diyl, pyrimidine-2, 5-diyl or pyrazine-2, 5-diyl, and K equals 0 or 1, wherein when K equals 0, ring P is pyridine-2, 5-diyl, pyrimidine-2, 5-diyl, and the amino bonding position in the ring is 5.
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Description

Technical field

[0001] The present invention relates to a liquid crystal alignment agent containing polyamic acid or its derivatives, which is obtained by reacting a diamine having an aromatic ring containing 1 or 2 nitrogen atoms with tetracarboxylic dianhydride of. It also relates to a liquid crystal alignment film obtained from the liquid crystal alignment agent, and a liquid crystal display element having the liquid crystal alignment film. Background technique

[0002] The liquid crystal display element is a variety of liquid crystal displays such as the viewfinder of the video camera, the viewfinder of the video camera, the projection display, etc., such as the monitor of a notebook computer or a desktop computer. It is used in devices and has recently begun to be widely used as a display element for televisions. In addition, it can also be used as an optical printer head, optical Fourier transform (optical Fourier transform) element, light valve and other optoelectronic r...

Claims

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