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Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element thereof

A technology of liquid crystal alignment agent and liquid crystal alignment film, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., which can solve the problems of large influence on the yield rate of production lines, easy breakdown of the alignment layer, short circuit of liquid crystal cells, etc., and achieve anti- Excellent electrostatic properties, broad market prospects, and the effect of improving the imidization rate

Active Publication Date: 2021-11-12
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, with the continuous expansion of the application range of LCD, electrostatic interference will often occur. At present, the static electricity generated during the rubbing alignment process, which is the most popular in the industry, easily breaks down the alignment layer, resulting in short circuit or poor alignment of the liquid crystal cell, which is harmful to the display. Picture quality and production line yield are greatly affected. In addition, the high-quality operation of liquid crystal display devices requires a high voltage holding ratio (VHR: Voltage Holding Ratio), so as to ensure that the effective voltage obtained by liquid crystal display elements after frame cycle charging can be fully maintained. To the next frame, reduce the flickering level of the picture and improve its display quality

Method used

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  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element thereof
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element thereof
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element thereof

Examples

Experimental program
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Effect test

Synthetic example 2

[0045] (1) Synthesis of compounds Synthesis of diamine compounds

Synthetic example 1

[0047] The compound represented by structural formula (1-1) can be synthesized according to the following synthetic route 1:

[0048]

[0049] Synthetic route 1

[0050] (1) Synthesis of compound 1-1-a

[0051] Put 2,3-dihydrothieno(3,4-b)-1,4-dioxin-2-amine (15.72g, 100mmol), p-nitroiodobenzene into a 1L three-neck round bottom flask (52.29g, 210 mmol), Pd(PPh3) 4 (1.16g, 1 mmol), anhydrous potassium carbonate (29.02g, 210 mmol) and 400g DMF, stirred at 80°C for 8 to 10 hours, followed by TLC, Until the raw material 2,3-dihydrothieno(3,4-b)-1,4-dioxin-2-amine has no residue, stop stirring, and filter the reaction solution after cooling down to room temperature to obtain a yellow solution, add 1000g of water Granulate, filter to obtain a yellow solid, add 220g of absolute ethanol and 110g of THF, stir for 30min and suction filter, dry the filter cake to obtain g of yellow crystals, the product is measured by HPLC-MS, m / z=399.20, confirmed to be the target product 1-1-a ,...

Synthetic example 2-5

[0058] The compounds represented by the structural formulas (1-2)-(1-5) can be synthesized according to the synthetic route 1 by using their respective parent compounds. The specific yield, high-resolution mass spectrometry results and elemental analysis results of each product are shown in Table 1 below. Synthesis examples 2-5 in Table 1, high-resolution mass spectrometry is HPLC-MC, and [M+1] is used to characterize the corresponding compound Molecular ion peak;

[0059] Yield, mass spectrum, elemental analysis data of each compound in table 1 synthesis example 2 to 5

[0060]

[0061] (2) Synthesis example of polymer

[0062] Synthesis Example 1

[0063] Under nitrogen atmosphere, drop into the diamine compound (23.68g, 50 mmoles) represented by structural formula (1-1) (hereinafter referred to as 1-1) in the three-neck round bottom flask of 500mL, m-phenylenediamine (2.16g, 20 mmol) (hereinafter referred to as 2-1), 4,4'-diaminodiphenylethane (6.37 g, 30 mmol) (herei...

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Abstract

The invention discloses a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display element, which belong to the technical field of liquid crystal display. The liquid crystal aligning agent comprises a polymer A obtained by reacting a tetracarboxylic dianhydride component a and a diamine component b. , the diamine component b includes a diamine compound b-1 having a specific structure, and the structure of the diamine compound b-1 is shown in general formula (1). The liquid crystal display element prepared by the liquid crystal aligning agent of the present invention has the advantages of strong antistatic performance, high voltage retention rate and good stability.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display element. Background technique [0002] Liquid crystal display elements are classified into various modes according to electrode structures and physical properties of liquid crystal molecules used. Currently known liquid crystal display devices are classified as follows, Twisted Nematic (TN) type or Super Twisted Nematic (Super Twisted Nematic, STN) type, Vertical Alignment (Vertical Alignment, VA) type, In-Plane Switching (IPS) type, fringe field switching (FringeFieldSwitching, FFS) type and other liquid crystal display elements. [0003] The liquid crystal alignment film aligns the liquid crystal molecules in the liquid crystal display element. Polyimide has become the preferred material for the liquid crystal alignment film due to its excellent heat resistance, mechanic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337C09K19/56C08G73/10
CPCC08G73/1007C08G73/1042C08G73/1064C09K19/56G02F1/133723
Inventor 李士东曹凤德王明佼解万龙王忠凯任辉彩
Owner JIANGSU SUNERA TECH CO LTD
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