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Liquid crystal composition and its liquid crystal display device

A liquid crystal composition and compound technology, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of insufficient absolute value of dielectric anisotropy, low driving voltage, slow response, etc., and achieve low driving voltage, Low-voltage drive, high-definition bright spot effect

Active Publication Date: 2022-06-17
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to obtain a lower driving voltage and reduce the power consumption of the liquid crystal display device, we need to increase the absolute value of the dielectric anisotropy of the liquid crystal material, but in the existing liquid crystal material, the dielectric anisotropy The absolute value is not large enough and there is a problem of slow response. For the improvement of the existing technology, we need to obtain a liquid crystal material with fast response and low driving voltage.

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

[0192] According to the compounds and weight percentages listed in Table 6, the same as the polymerizable components of Comparative Example 1, the liquid crystal composition of Example 1 was prepared, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table. Show:

[0193] Table 6 Liquid crystal composition formula and its test performance

[0194] component code weight percent 3CPUF 23.5 3CCPUF 10 2CCPUF 3 2CCPOCF3 8 3CCPOCF3 10 3CCV 26 3PGPF 3 4PGPF 1.5 5PGPF 3 1O4OPGU1(2F)OUF 6 1O3OPGU1(2F)OUF 6 total 100

[0195] The content and components of the polymerizable components are the same as those of Comparative Example 1.

[0196] The performance parameter test results of the obtained composition are as follows in Table 5:

[0197] Table 7 Performance parameter test

[0198] T N→I

Embodiment 2

[0200] According to each compound listed in Table 8 and Table 9 and the weight percentage, the liquid crystal composition of Example 2 is prepared, and it is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0201] Table 8 Liquid crystal composition formula and its test performance

[0202]

[0203]

[0204] Add the polymerizable components in Table 9 to 100 parts by weight of the above-mentioned liquid crystal composition:

[0205] Table 9 Polymerizable Components

[0206]

[0207] The performance parameter test results of the obtained composition are as follows in Table 10:

[0208] Table 10 Performance parameter test

[0209] T N→I

[0210] It can be seen from the comparison of the above Comparative Example 1 and Examples 1-2 that under the condition that the dielectric anisotropy is basically unchanged, after the component of the general formula I described in the ...

Embodiment 3

[0221] The liquid crystal composition of Example 3 was prepared according to the compounds and weight percentages listed in Table 13, and the same as the polymerizable components of Comparative Example 1. It was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table. Show:

[0222] Table 13 Liquid crystal composition formula and its test performance

[0223]

[0224]

[0225] The content and components of the polymerizable components are the same as those of Comparative Example 1.

[0226] The performance parameter test results of the obtained composition are as follows in Table 14:

[0227] Table 14 Performance parameter test

[0228] T N→I

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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 compound of general formula II. The invention also discloses a liquid crystal display device comprising the liquid crystal composition. The liquid crystal composition provided by the present invention has faster response speed and lower driving voltage while maintaining suitable optical anisotropy, high clearing point, and large absolute value of dielectric anisotropy. When the material is applied to a liquid crystal display device, low-voltage driving can be realized to reduce power consumption.

Description

technical field [0001] The present 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 achieved rapid development due to its small size, light weight, low power consumption and excellent display quality, and is especially widely used in portable electronic information products. As the size of liquid crystal screens for portable computers, office applications, and video applications increases, liquid crystal displays can be used for large screen displays and eventually replace cathode ray tube (CRT) displays. [0003] According to the type of display mode, it is divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electronically controlled birefringence), OCB (optically compensated bend), IPS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/46G02F1/1333
CPCG02F1/1333C09K19/44C09K19/46
Inventor 王立威马文阳徐海彬张文琦
Owner JIANGSU HECHENG DISPLAY TECH CO LTD