Unlock instant, AI-driven research and patent intelligence for your innovation.

Liquid crystal aligning agent, liquid crystal alignment film, display substrate, liquid crystal display device, and polyimide

A technology of liquid crystal alignment agent and polyamic acid, which is applied in liquid crystal materials, instruments, organic chemistry, etc., and can solve problems such as easy debris of liquid crystal alignment film and poor display of liquid crystal display substrates

Pending Publication Date: 2022-04-01
HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the problem that the liquid crystal alignment film is prone to debris during rubbing alignment in the related art, resulting in poor display of the liquid crystal display substrate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid crystal aligning agent, liquid crystal alignment film, display substrate, liquid crystal display device, and polyimide
  • Liquid crystal aligning agent, liquid crystal alignment film, display substrate, liquid crystal display device, and polyimide
  • Liquid crystal aligning agent, liquid crystal alignment film, display substrate, liquid crystal display device, and polyimide

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0251] In Experimental Example 1, two kinds of dianhydrides and diamines that have been mass-produced at present are used. The structural formulas of dianhydrides and diamines are shown in the following formula (i) and the following formula (ii).

[0252]

[0253] The preparation method is as follows:

[0254] S1. Add a certain amount of N-methylpyrrolidone or DMF into the reactor, pass nitrogen protection into the reactor, add bisanhydride (i) and diamine (ii) to mix, and under stirring, control the temperature of the reactor Polymerization is carried out at a temperature of 15-30° C. and a reaction time of 4-6 hours to obtain polyimide A.

[0255] S2, the purified polyamic acid A with a certain solvent (by GBL (γ-butyrrolactone, γ-butyrolactone), NMP (N-methyl-2-pyrrolidone, N-methylpyrrolidone), BC (Butyl carbitol (Butyl Di-glycol), diethylene glycol monobutyl ether) and DAA (Diacetone alcohol, diacetone alcohol) are diluted according to the ratio of 50:30:10:10), and t...

experiment example 2

[0262] Experimental Example 2 adopts the following various experimental schemes. The preparation process of the following experimental scheme is basically the same as that of Experimental Example 1. The difference is that the experimental raw materials used in Experimental Example 2 are the following dianhydrides and diamines provided by the present disclosure.

[0263] The first experimental scheme, the experimental raw material is the first bisanhydride shown in the following formula (I) and the first diamine shown in the following formula (II), wherein R 1 and R 2 are selected from methyl.

[0264] The second experimental scheme, the experimental raw material is the first bisanhydride shown in the following formula (I) and the first diamine shown in the following formula (III), wherein R 1 and R 2 are selected from methyl.

[0265] The third test scheme, the experimental raw material is the first dianhydride shown in the following formula (I), the first diamine shown in ...

experiment example 3

[0276] Experimental Example 3 adopts the following various experimental schemes, the following experimental schemes are basically the same as Experimental Example 2, the difference is that the experimental raw materials used in Experimental Example 3 also contain hydrophobic groups and hydrophilic groups.

[0277] The first experimental scheme, the experimental raw material is the first bisanhydride shown in the following formula (I) and the first diamine shown in the following formula (II), wherein R 1 and R 2 are selected from methyl.

[0278] The second experimental scheme, the experimental raw material is the first bisanhydride shown in the following formula (I) and the first diamine shown in the following formula (III), wherein R 1 and R 2 are selected from methyl.

[0279] The third test scheme, the experimental raw material is the first dianhydride shown in the following formula (I), the first diamine shown in the following formula (II) and the second dianhydride sho...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of display, in particular to a liquid crystal alignment agent, a liquid crystal alignment film, a display substrate, a liquid crystal display device and polyimide. The problem that the liquid crystal display substrate is poor in display due to the fact that chippings are prone to being generated when a liquid crystal alignment film rubs and aligns in the prior art is solved. The liquid crystal aligning agent comprises a first chain segment structure generated by first dianhydride as shown in the following formula (I) and first diamine as shown in the following formula (II) or (III). X1 is an amorphous chain segment; y1 is selected from a single bond, O, NH, S, one or more unsaturated double bonds and any one of substituted or unsubstituted aliphatic rings, aromatic rings, heterocyclic rings and fused rings, one A1 and one A2 are selected from C and are both combined with Y1, and the rest A1 and A2 are respectively selected from any one of CH, CR and N; z1 is selected from any one of an aliphatic ring, an aromatic ring, a heterocyclic ring and a fused ring, and A3 and A4 are each selected from any one of CH, CR and N. R1, R2 and R are respectively selected from any one of hydrogen and aliphatic alkyl.

Description

technical field [0001] The present disclosure relates to the field of display technology, in particular to a liquid crystal aligning agent, a liquid crystal aligning film, a display substrate, a liquid crystal display device and polyimide. Background technique [0002] Liquid crystal display device is a display device used on a large scale at present. It has the advantages of low cost, thinner and thinner, and faster display speed. It has mature technology in theoretical research and practical technology. Contents of the invention [0003] The main purpose of the present invention is to provide a liquid crystal aligning agent, a liquid crystal aligning film, a display substrate, a liquid crystal display device and a polyimide. It is used to solve the problem in the related art that the liquid crystal alignment film is prone to debris during rubbing alignment, thereby causing poor display of the liquid crystal display substrate. [0004] To achieve the above object, the pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K19/56C08G73/10C08J5/18C08L79/08G02F1/1337
CPCC08L79/08C08G73/10C09K19/56C08J5/18C07D307/60C07D309/32C07D241/04G02F1/1337
Inventor 马健任文明詹成勇张然
Owner HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD