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Liquid crystal medium and its application

A technology of liquid crystal medium and general formula, applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of narrow nematic phase range and high driving voltage

Active Publication Date: 2019-02-15
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid crystal materials in the prior art still have problems such as relatively narrow nematic phase range and high driving voltage.

Method used

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  • Liquid crystal medium and its application
  • Liquid crystal medium and its application
  • Liquid crystal medium and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0272] The liquid crystal composition of Example 1 was prepared by each compound listed in Table 3 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0273] Table 3 liquid crystal composition formula and test performance thereof

[0274]

[0275] The temperature range of the liquid crystal phase of the liquid crystal composition described in Example 1 is 69°C. Compared with the composition of Comparative Example 1, the liquid crystal phase range is widened by 38°C, and has a lower driving voltage, achieving very good technical effects. The liquid crystal composition described in Example 1 is suitable for USH mode.

Embodiment 2

[0277] The liquid crystal composition of Example 2 was formulated according to the compounds and weight percentages listed in Table 4, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the table below:

[0278] Table 4 liquid crystal composition formula and test performance thereof

[0279]

[0280] The temperature range of the liquid crystal phase of the liquid crystal composition described in Example 2 is 77°C. Compared with the composition of Comparative Example 1, the liquid crystal phase range is widened by 46°C, and has a lower driving voltage, achieving very good technical effects. The liquid crystal composition described in Example 2 is suitable for USH mode.

Embodiment 3

[0282] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 5 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0283] Table 5 liquid crystal composition formula and test performance thereof

[0284]

[0285]

[0286] The temperature range of the liquid crystal phase of the liquid crystal composition described in Example 3 is 79°C. Compared with the composition of Comparative Example 1, the liquid crystal phase range is widened by 48°C, and has a lower driving voltage, achieving very good technical effects. The liquid crystal composition described in Example 3 is suitable for USH mode.

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PUM

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Abstract

The invention provides liquid crystal media and application thereof. The liquid crystal media comprise at least one group formed by compounds shown in a general formula I and / or a general formula II, at least one group formed by compounds shown in a general formula IV-1 and / or a general formula IV-2 and at least one group formed by compounds shown in a general formula V-1 and / or a general formula V-2. The liquid crystal media have a wide nematic phase range and lower driving voltage and especially have the characteristic of a higher low-temperature phase change point; a USH (uniformly standing helix)-mode display containing the liquid crystal media has wider phase change temperature, lower driving voltage and the higher low-temperature phase change point.

Description

technical field [0001] The invention relates to a liquid crystal medium and a liquid crystal display element comprising the liquid crystal medium, in particular, a liquid crystal composition suitable for a "Uniformly Standing Helix" (USH) mode and its application in a liquid crystal display element. Background technique [0002] Liquid crystal display elements can be used in various home appliances represented by clocks and electronic calculators, measuring equipment, automotive panels, word processors, computers, printers, televisions, and the like. As a liquid crystal display method, among its representative methods, PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (supertwisted nematic, super twisted nematic), ECB (electrically controlled birefringence) , electronically controlled birefringence), OCB (optically compensated bend, optically compensated bending), IPS (in-plane switching, coplanar transition), VA (vertical alignment, vertical alignmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/14C09K19/12C09K19/30C09K19/44G02F1/1333
CPCC09K2019/0444
Inventor 韩文明徐爽陈昭远游石枝
Owner JIANGSU HECHENG DISPLAY TECH CO LTD
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