Liquid-crystal orientation agent, liquid-crystal orientation membrane and liquid-crystal display component

A liquid crystal alignment agent, polymer technology, applied in liquid crystal materials, optics, instruments, etc.

Active Publication Date: 2014-02-19
DAXIN MATERIALS
View PDF9 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, academia and the industry have invested a lot of effort in researching the above-mentioned problems. However, no satisfactory solution has been obtained so far. Therefore, the industry continues to demand a new liquid crystal alignment agent. The liquid crystal alignment film made by it can have both low residue Shadow phenomenon and low residual DC voltage and other characteristics

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 orientation agent, liquid-crystal orientation membrane and liquid-crystal display component
  • Liquid-crystal orientation agent, liquid-crystal orientation membrane and liquid-crystal display component
  • Liquid-crystal orientation agent, liquid-crystal orientation membrane and liquid-crystal display component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] In Examples 1, 8, and 9, the content of diamine (a-1-1) is gradually increasing, and the content of diamine (a-1-1) in Example 1 is the lowest, and its residual DC voltage is 81mV. The content of the diamine (a-1-1) in Example 9 is the highest, but its image sticking property at room temperature is the worst, and the residual DC voltage is the highest. Therefore, the amount of diamine (a-1-1) used has a certain range, and if it is not used at all as in Comparative Examples 1' and 2', or used in excess as in Examples 8 and 9, it will cause residual DC voltage of the liquid crystal display component The higher the temperature and the worse the image sticking characteristics at room temperature, the amount of diamine (a-1-1) is preferably less than 30wt% of the total amount of diamine, more preferably less than 15wt%.

[0143] In Examples 1 to 4, the diamine and tetracarboxylic dianhydride (a-4) used are the same, and the difference between the four mainly lies in the imid...

Embodiment 13

[0159] The only difference between Example 13 and Comparative Example 3' is that the latter replaces diamine (a-1-2) with diamine (a-2-1), that is, comparative example 3' only uses diamine (a- 2-1), diamine (a-3-6), but without using diamine (a-1-2), the residual DC voltage of comparative example 3' is significantly higher. Therefore, the present invention simultaneously uses three kinds of diamines as reactants of polymer (A), through the phenolic groups provided by diamines (a-1) and diamines (a-2), and the combination of phenolic groups and tertiary nitrogen atoms The synergistic effect can reduce the residual DC voltage of the liquid crystal display component.

[0160] In Examples 10, 11, 13, and 14, three kinds of diamines were used as reactants of the polymer (A), and the obtained image sticking characteristics were excellent and excellent, and the residual DC voltage was 19 to 48, which showed that the simultaneous use of diamines ( a-1-2) and diamine (a-2-1), and addi...

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 a liquid-crystal orientation agent, a liquid-crystal orientation membrane prepared by the liquid-crystal orientation agent, and a liquid-crystal display component prepared by the liquid-crystal orientation agent. The liquid-crystal orientation agent comprises a polymer (A). The polymer (A) comprises a polyamide acid or a polyimide and the weight percent of the polyamide acid or the polyimide is higher than 50%. The polymer (A) also comprises a phenol skeleton having a molar percent higher than 2.5%, and a tertiary nitrogen skeleton having a molar percent higher than 5%. The liquid-crystal orientation membrane prepared by the liquid-crystal orientation agent has characteristics of low residual DC voltage and low image residual.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent and a liquid crystal alignment film and a liquid crystal display component made thereof, and in particular to a liquid crystal alignment agent with low residual DC voltage and low image sticking characteristics and a liquid crystal alignment film made thereof film and liquid crystal display components. Background technique [0002] Liquid crystal display components have generally replaced traditional cathode ray tube displays and are widely used in household and personal electronic products due to their thinness, lightness, power saving, and high image quality. [0003] To improve the image quality of liquid crystal display components, the liquid crystal alignment film should have the following properties: (1) Low image sticking effect (Image Sticking Effect): If a general liquid crystal display component continuously displays the same screen for a long time, after the screen is switched, 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
Patent Type & AuthorityApplications(China)
IPC IPC(8): C09K19/56G02F1/1337G02F1/1333
Inventor张立心林冠铭李柏毅赖铭智
OwnerDAXIN MATERIALS