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Liquid crystal composition and liquid crystal display element

A technology for liquid crystal display elements and liquid crystal compositions, applied in the directions of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of easy change of tilt angle, not easy to change, slow polymerization, etc., and achieve high tilt stability and fast polymerization speed. , the effect of high VHR

Pending Publication Date: 2020-05-22
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the UV irradiation process of manufacturing PSA-type and PSVA-type liquid crystal display elements, the polymerizable compound cannot be sufficiently polymerized, and a large amount of polymerizable compound remains
As a result, the formation of the inclination angle is insufficient, image sticking is caused by the deterioration of the response speed and the deterioration of the orientation, and the residual polymerizable compound slowly polymerizes during driving, the inclination angle changes, and display defects such as screen burn-in (IS) are confirmed.
In addition, it was also confirmed that, as a characteristic of polymerizable compounds, there are cases where the inclination angle is easily changed and cases where it is not easy to change

Method used

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  • Liquid crystal composition and liquid crystal display element
  • Liquid crystal composition and liquid crystal display element
  • Liquid crystal composition and liquid crystal display element

Examples

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Effect test

Embodiment 1

[0225] In Example 1 (E-01) to Example 4 (E-04), RM was 0, which was a sufficiently small value below the lower limit of detection. In addition, it was confirmed that Tilt of these was a sufficiently large value, IS was a sufficiently small value, and VHR was a sufficiently high value. From the above, it was confirmed that these Examples solved the problems of the present invention. On the other hand, it was confirmed that the IS of Comparative Example 1 (C-01) was 135, which was very large, and that the RM of Comparative Example 2 (C-02) was 11, which was a large value. From the above, it was confirmed that these comparative examples cannot solve the problems of the present invention.

[0226] [chem 25]

[0227]

[0228] Prepared by replacing the polymeric compound represented by the formula (RM-22O2) contained in Example 1 (E-01) to Example 4 (E-04) with the polymeric compound represented by the formula (RM-22O1) It was confirmed that the problem of the present invention ...

Embodiment 5

[0240] In Example 5 (E-05) to Example 10 (E-10), RM was 0, which was a sufficiently small value below the detection lower limit. In addition, it was confirmed that Tilt of these was a sufficiently large value, IS was a sufficiently small value, and VHR was a sufficiently high value. From the above, it was confirmed that these Examples solved the problems of the present invention.

[0241] In the examples of the present invention, it was confirmed that the problem of the present invention was solved when about 1% of a compound suitable for PI-free having an OH group as a polar group was added to form a liquid crystal display element from a substrate without an alignment film.

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Abstract

The present invention aims to provide a polymerizable compound-containing liquid crystal composition capable of achieving a fast polymerization speed, a large tilt angle formation, a high tilt stability, and a high voltage retention rate (VHR), and a PSA-type or PSVA-type liquid crystal display element using the liquid crystal composition. The present invention provides a liquid crystal composition in which a plurality of specific polymerizable compounds represented by the general formulas (RM-13) and (RM-22) are combined. The present invention provides a liquid crystal display element using the liquid crystal composition to solve the above-mentioned problems. In the formula, P3, P4, P5 and P6 represent polymerizable groups, S3 represents a single bond or an alkylene group having 1 to 5 carbon atoms, Y1 to Y12 represent a fluorine atom or a hydrogen atom, and at least one thereof represents a fluorine atom, and A1 to A8 represents a hydrogen atom or an alkoxy group having 1 to 5 carbonatoms.

Description

technical field [0001] The present invention relates to a liquid crystal composition and a liquid crystal display element using the same. Background technique [0002] As a liquid crystal display element using a liquid crystal composition whose dielectric constant anisotropy Δε shows a negative value, PSA, PSVA type liquid crystal TV, liquid crystal monitor, etc. have been widely used, and as liquid crystal compositions suitable for them, Patent Document 1, Patent Document 1 2. Patent Document 3, Patent Document 4, Patent Document 5 and the like disclose various polymerizable compounds and liquid crystal compositions containing them. For example, Patent Document 5 discloses a combination of a polymeric compound M1B1 and a polymeric compound M2A1, [0003] [chemical 1] [0004] [0005] With this combination, preferable results were obtained with respect to the tilt angle, the concentration of unreacted polymerizable compound (typically reactive mesogen (RM)), and the vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46C09K19/54G02F1/137
CPCC09K19/46C09K19/54G02F1/137C09K19/38C08F20/30C08F20/22C08K5/005C08K5/1575C08K5/13
Inventor 须藤豪杨焯
Owner DIC CORP
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