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Negative dielectric anisotrophy liquid crystal mixture

An anisotropic, liquid crystal material technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effect of reducing driving voltage, low threshold voltage, and high-definition bright spots

Active Publication Date: 2012-02-08
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, current liquid crystal mixtures with negative dielectric anisotropy cannot fully meet the above requirements, and there are usually few liquid crystal mixtures whose absolute value of dielectric anisotropy is greater than 7.

Method used

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  • Negative dielectric anisotrophy liquid crystal mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] According to the method described above, prepare a liquid crystal mixture including the following components, and measure its characteristics

[0062]

[0063]

[0064]

[0065] The liquid crystal composition has the following performance parameters:

[0066]

Embodiment 2

[0068] According to the method described above, prepare a liquid crystal mixture including the following components, and measure its characteristics

[0069]

[0070]

[0071] The liquid crystal composition has the following performance parameters:

[0072]

[0073]

Embodiment 3

[0075] According to the method described above, prepare a liquid crystal mixture including the following components, and measure its characteristics

[0076]

[0077]

[0078] The liquid crystal composition has the following performance parameters:

[0079]

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Abstract

The invention relates to a polar compound liquid crystal mixture with the negative dielectric anisotrophy, which is characterized by being composed by one or a plurality of compounds in general formulas I-III, wherein R1, R2, R3, R4, R5 and R6 respectively and independently represent the linear chained alkyl with 1-8 carbon atom(s) or the alkoxy with 1-7 carbon atom(s), and Z1, Z2, Z3 and Z4 respectively and independently represent single linkages, - CH2CH2-, - C=-C-, -COO-, -OCH2-, -CH2O-, -CH=N-and the like, n represents three integers of 0, 1 or 2; and link A represents trans form 1, 4 cyclohexylidene or 1, 4-phenylene. The liquid crystal mixture has larger negative dielectric anisotrophy and higher clearing point.

Description

technical field [0001] The invention relates to a liquid crystal mixture with negative dielectric anisotropy, which is mainly used in VA (vertical alignment) mode and can be used in the field of vehicle display and the like. Background technique [0002] Negative dielectric anisotropy liquid crystal materials can be applied in VA, ECB, MVA, PVA, DS, OCB, GH, FLC, PDLC and other display modes. Compared with the ordinary TN mode, the VA mode has a very good dark state contrast, and the contrast is less dependent on the birefringence of the liquid crystal, the thickness of the liquid crystal layer, and the wavelength of the incident light. The VA mode also has a good performance in wide viewing angles. In addition, the VA mode can also omit the rubbing process, which also increases the yield. For the VA display mode, it is often required that the liquid crystal mixture has a large negative dielectric anisotropy, a high clearing point, a low threshold voltage and a fast respons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/20
Inventor 贵丽红梁志安丰景义乔云霞刘凤梅翟媛媛
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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