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Liquid crystal display element and method for manufacturing liquid crystal display element

A liquid crystal cell, liquid crystal technology, applied in the directions of instruments, optics, nonlinear optics, etc., can solve the problems of large mesogen structure, unable to fully exert the liquid crystal orientation ability, unable to obtain light sensitivity, etc.

Active Publication Date: 2019-04-12
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the PSA method, the solubility of the polymerizable compound added to the liquid crystal material is low, and there is a problem that unreacted polymerizable compound remains in the liquid crystal material as an impurity.
When unreacted polymerizable compounds remain, there is a problem that the desired photosensitivity cannot be obtained, and the ability to align liquid crystals cannot be fully exhibited
In addition, when the desired light sensitivity cannot be obtained, there will be a problem of image sticking
In order to further improve the photosensitivity, when it is desired to have absorption up to the long-wavelength side of ultraviolet rays, it is necessary to prolong the conjugation of the polymerizable compound, and the following problems arise: the mesogenic structure becomes larger, or the ring structure, etc. The increase of the rigid structure leads to a gradual decrease in its solubility in liquid crystal materials

Method used

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  • Liquid crystal display element and method for manufacturing liquid crystal display element
  • Liquid crystal display element and method for manufacturing liquid crystal display element
  • Liquid crystal display element and method for manufacturing liquid crystal display element

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Experimental program
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Embodiment

[0236] Hereinafter, although it demonstrates in detail based on an Example, this invention is not limited to this Example at all.

[0237]

[0238] In the present invention, the abbreviations of the polymerizable compounds contained in the liquid crystal composition are as follows. In addition, polymeric compound [RM1] - [RM3] is the same as the polymeric compound of said formula [2-1] - [2-3].

[0239]

Synthetic example 1

[0241] Let the polymeric compound represented by the well-known following formula be a polymeric compound [RM1].

[0242]

Synthetic example 2

[0244] Synthesis of polymeric compound [RM2]

[0245]

[0246] Add 6-bromo-2-naphthol [H] (150g, 672mol), tert-butyl acrylate [B] (103.4g, 807mmol), palladium acetate (3.02g, 13.5mmol), three ( O-tolyl)phosphine (8.19 g, 26.9 mmol), tripropylamine (289.0 g, 2.02 mol), and DMAc (700 g) were heated and stirred at 100°C. Reaction tracking was carried out by HPLC, and after confirming the completion of the reaction, the reaction solution was cooled to around room temperature, and poured into 3 L of 1M aqueous hydrochloric acid solution. Ethyl acetate (2 L) was added thereto, and the aqueous layer was removed by liquid separation. After the organic layer was washed twice with 1 L of 10% aqueous hydrochloric acid solution and three times with 1 L of saturated brine, the organic layer was dried over magnesium sulfate. Thereafter, the solvent was distilled off by filtration and an evaporator to obtain 181 g of compound [I] (99% yield).

[0247] The measurement results of nuclear...

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Abstract

A liquid crystal display element comprising: a pair of substrates facing each other, a liquid crystal layer sandwiched between the substrates, a liquid crystal alignment film on the side of the liquid crystal layer of at least one substrate, and the liquid crystal alignment film is made of a liquid crystal alignment agent containing a polymer The liquid crystal layer is formed from a liquid crystal composition containing a polymerizable compound and a liquid crystal, the polymerizable compound has a polymerizable unsaturated bonding group, a functional group forming a hydrogen bond, and at least one aromatic ring near the functional group, the functional group The mesogenic structure is formed by forming hydrogen bonds between molecules.

Description

technical field [0001] The present invention relates to a liquid crystal display element including a liquid crystal material containing a polymerizable compound, and a method for manufacturing the liquid crystal display element. Background technique [0002] An MVA (Multi-domain Vertical Alignment, multi-quadrant vertical alignment) system excellent in viewing angle characteristics is known as a liquid crystal display element used in liquid crystal televisions, liquid crystal displays, and the like (for example, refer to Patent Document 1). In the MVA method, liquid crystals having negative dielectric constant anisotropy are vertically aligned by forming protrusions and slits for controlling the inclination direction of liquid crystals on substrates and display electrodes. According to this MVA method, even if the brushing process is not performed on the liquid crystal alignment film, the liquid crystal alignment at the time of voltage application can be controlled to a vari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337C08F20/30
CPCC08F20/30G02F1/133711G02F1/133788G02F1/133742C08L33/12C08L79/08C08L83/04
Inventor 芦泽亮一后藤耕平南悟志森内正人川野勇太
Owner NISSAN CHEM IND LTD