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Liquid crystal composition and liquid crystal display element

A liquid crystal composition and compound technology, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as high dielectric anisotropy value, low optical birefringence value, and difficulty in liquid crystal composition, and achieve high voltage retention rate, Effect of low viscosity and ensuring high voltage retention characteristics

Inactive Publication Date: 2009-09-30
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of liquid crystal composition material modulation, the various properties of the material (low optical birefringence value, high dielectric anisotropy value, high resistivity, low rotational viscosity, low melting point, good Thermal stability and UV stability, etc.) are mutually restrained, improving the performance of some aspects is often accompanied by the reduction of other aspects of performance, and it is often very difficult to prepare a liquid crystal composition with suitable performance in all aspects

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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Comparison scheme
Effect test

Embodiment 1

[0043] The liquid crystal composition of the present embodiment comprises the following compounds by percentage,

[0044]

[0045]

[0046] The cyclohexyl groups in all the above structural formulas are in the trans configuration. The physical parameters of the composition are as follows: Δn: 0.060; Δε: 3.64; clearing point: 79°C; V 10 : 1.75V; V 90 : 2.74V.

Embodiment 2

[0048] The liquid crystal composition of the present embodiment comprises the following compounds by percentage,

[0049]

[0050]

[0051] The cyclohexyl groups in all the above structural formulas are in the trans configuration. The physical parameters of the composition are as follows: Δn: 0.062; Δε: 3.98; clearing point: 88°C; V 10 : 1.68V; V 90 : 2.68V.

Embodiment 3

[0053] The liquid crystal composition of the present embodiment comprises the following compounds by percentage,

[0054]

[0055] The cyclohexyl groups in all the above structural formulas are in the trans configuration. The physical parameters of the composition are as follows: Δn: 0.058; Δε: 3.05; clearing point: 74°C; V 10 : 1.88V; V 90 : 2.99V.

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Abstract

The invention discloses a liquid crystal composition and a liquid crystal display element. The optical birefringence value delta n of the liquid crystal composition is between 0.055 and 0.075, the liquid crystal composition is a positive dielectric anisotropic liquid crystal composition which has low threshold voltage and high voltage holding ratio and is used in an active matrix display element, and the liquid crystal display element contains the liquid crystal composition. The liquid crystal composition comprises compounds represented by general formulas I, II, III, and IV, and the liquid crystal composition comprises the following compounds in percentage by weight: 10 to 55 percent of I, 1 to 45 percent of II, 5 to 60 percent of III, and 1 to 30 percent of IV; the liquid crystal composition is arranged in a liquid crystal box to form the liquid crystal display element; and the general formula of the compounds represented by the I, the II, the III and the IV is the right formula.

Description

technical field [0001] The present invention relates to a liquid crystal composition and a liquid crystal display element composed of the liquid crystal composition, in particular to a liquid crystal composition for an active matrix driven liquid crystal display element and a liquid crystal display element containing the composition. Background technique [0002] The liquid crystal display element works by utilizing the optical anisotropy and dielectric anisotropy possessed by the liquid crystal material itself, and has been widely used at present. Using the different characteristics and working modes of liquid crystal materials, the device can be designed into various working modes. Among them, the TN mode (twisted nematic mode, the liquid crystal mixture has a nematic structure twisted about 90 degrees) is commonly used in conventional displays. , STN mode (super twisted nematic mode), SBE mode (super twisted birefringence), ECB mode (electrically controlled birefringence)...

Claims

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Application Information

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IPC IPC(8): C09K19/30G02F1/13
Inventor 梁志安牟俊霞尹环
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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