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Liquid crystal composition with negative dielectric anisotropy and its application

A liquid crystal composition and compound technology, applied in liquid crystal materials, nonlinear optics, instruments, etc., can solve the problems of compounds with insufficient optical anisotropy, low voltage retention rate, and insufficient dielectric anisotropy

Active Publication Date: 2018-12-18
JIANGSU HECHENG DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing liquid crystal composition, better characteristics can be obtained, but the optical anisotropy of this type of compound is not large enough, the dielectric anisotropy is not large enough, the ultraviolet and high temperature stability is poor, and the voltage retention rate is low. Compositions with large optical anisotropy, suitable dielectric anisotropy, better stability, and better contrast are not helpful, and directly cause the display to be prone to afterimage problems and shorten the service life of the display

Method used

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  • Liquid crystal composition with negative dielectric anisotropy and its application
  • Liquid crystal composition with negative dielectric anisotropy and its application
  • Liquid crystal composition with negative dielectric anisotropy and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Table 3 lists the components of the liquid crystal composition of Example 1 and the weight percentage of each component. The liquid crystal composition is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0118] The formula of table 3 liquid crystal composition and test performance thereof

[0119]

Embodiment 2

[0121] Table 4 lists the components of the liquid crystal composition of Comparative Example 2 and the weight percentages of each component. The liquid crystal composition is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0122] The formula of table 4 liquid crystal composition and test performance thereof

[0123]

[0124]

Embodiment 3

[0126] Table 5 lists the components of the liquid crystal composition of Example 3 and the weight percentages of each component. The liquid crystal composition is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0127] The formula of table 5 liquid crystal composition and test performance thereof

[0128]

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PUM

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Abstract

The present invention provides a liquid crystal composition, which contains at least a group comprising a compound represented by a general formula I; at least a group comprising a compound represented by a general formula II-1, II-2 and / or II-3; and at least a group comprising a compound represented by a general formula III-1 and / or III-2, and has characteristics of suitable optical anisotropy, large dielectric anisotropy, large resistivity, high voltage retention rate, and the like. The present invention further provides a liquid crystal display element containing the liquid crystal composition, wherein the liquid crystal display element has advantages of low driving voltage, high contrast, low power consumption, long service life, and the like. The formulas I, II-1, II-2, II-3, III-1 and III-2 are defined in the specification.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with low refractive index, high dielectric anisotropy and good ultraviolet stability and its application in liquid crystal displays. Background technique [0002] For liquid crystal display elements, according to the display mode of liquid crystal, 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 (optical compensated bend), IPS (in-plane switching, in-plane transition), VA (vertical alignment, vertical alignment) and other types. Liquid crystal display elements are classified into reflective type using natural light, transmissive type using backlight, and transflective type using both natural light and backlight according to the type of light source. [0003] It is known ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44G02F1/13
Inventor 韩文明徐爽徐海彬张文琦
Owner JIANGSU HECHENG DISPLAY TECH CO LTD