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Liquid crystal composition and its liquid crystal display device

A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, chemical instruments and methods, organic chemistry, etc., can solve problems such as pretilt angle shift, and achieve the effects of high rotational viscosity, good pretilt angle stability, and excellent display effect.

Active Publication Date: 2021-06-04
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pretilt angle stability test of the existing liquid crystal composition was found that the pretilt angle would be significantly shifted under long-term voltage driving, so a new type of liquid crystal medium with improved properties is currently needed

Method used

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  • Liquid crystal composition and its liquid crystal display device
  • Liquid crystal composition and its liquid crystal display device
  • Liquid crystal composition and its liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] The compounds and weight percentages listed in Table 5 were formulated with the polymerizable components of Comparative Example 1 to prepare the liquid crystal composition of Example 1, which was filled between the two substrates of the liquid crystal display for performance testing.

[0139] Table 5 liquid crystal composition formula

[0140]

[0141]

[0142] The content and components of the polymerizable component are the same as in Comparative Example 1.

[0143] The performance parameter test result of gained composition is as follows table 6:

[0144] Table 6 Performance parameter test

[0145] T S→N

Embodiment 2

[0147] The liquid crystal composition of Example 2 was formulated according to the compounds and weight percentages listed in Table 7 and Table 8, which was filled between the two substrates of the liquid crystal display for performance testing.

[0148] Table 7 Liquid crystal composition formula

[0149]

[0150]

[0151] Add the polymerizable components in Table 8 to 100 parts by weight of the liquid crystal composition:

[0152] Table 8 Polymerizable Components

[0153]

[0154] The performance parameter test result of gained composition is as follows table 9:

[0155] Table 9 performance parameter test

[0156] T S→N

Embodiment 3

[0158] The liquid crystal composition of Example 3 was formulated according to the compounds and weight percentages listed in Table 10 and Table 11, which was filled between the two substrates of the liquid crystal display for performance testing.

[0159] Table 10 liquid crystal composition formula

[0160]

[0161]

[0162] Add the polymerizable components in Table 11 to 100 parts by weight of the above-mentioned liquid crystal composition:

[0163] Table 11 Polymerizable Components

[0164]

[0165] The performance parameter test result of gained composition is as follows table 12:

[0166] Table 12 Performance parameter test

[0167] T S→N

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PUM

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Abstract

The invention discloses a liquid crystal composition, which comprises: at least one compound of general formula I; and at least one polymerizable compound of general formula II. The liquid crystal composition provided by the present invention has suitable optical anisotropy, suitable dielectric anisotropy, low flow viscosity, suitable rotational viscosity and good predictability while maintaining a relatively high clearing point. Tilt angle stability, under long-term voltage driving, the pre-tilt angle basically does not shift. Also disclosed herein is a liquid crystal display device comprising the liquid crystal composition. When the liquid crystal composition is applied to a PSA type liquid crystal display, it has an excellent display effect. The present invention also provides a liquid crystal display device comprising the liquid crystal composition.

Description

technical field [0001] The invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and a liquid crystal display device thereof. Background technique [0002] Liquid Crystal Display (LCD) has been developed rapidly due to its small size, light weight, low power consumption and excellent display quality, and is especially widely used in portable electronic information products. According to the type of display mode, it is divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (supertwisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically controlled birefringence), OCB (optically compensated bend), IPS (in-plane switching, coplanar transformation), FFS (fringe field switching, edge field switching), VA (vertical alignment, vertical alignment) and PSA (polymer stable alignment, polymer Stable alignment) and other types. [0003] Among them, the PSA mode is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/54C07C69/653C09K19/54
CPCC09K19/542
Inventor 王立威徐海彬马文阳张文琦
Owner JIANGSU HECHENG DISPLAY TECH CO LTD
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