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Cyclopropyl-contained negative dielectric anisotropic liquid crystal medium and application thereof

A technology of dielectric anisotropy and liquid crystal medium, applied in liquid crystal materials, nonlinear optics, optics, etc., can solve the problems of poor mutual solubility of negative liquid crystal compounds, achieve increased mutual solubility, reduce pretilt angle, and improve black state Effect

Inactive Publication Date: 2015-05-06
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the negative liquid crystal compound of the existing terminal group alkyl group of 2,3-difluorophenyl groups, there are patent problems and contain The technical problem of the negative liquid crystal compound of the 2,3-difluorophenyl group of the substituent is poor mutual solubility, the present invention intends to provide a kind of negative liquid crystal compound containing the 2,3-difluorophenyl group of the cyclopropyl group liquid crystal medium

Method used

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  • Cyclopropyl-contained negative dielectric anisotropic liquid crystal medium and application thereof
  • Cyclopropyl-contained negative dielectric anisotropic liquid crystal medium and application thereof
  • Cyclopropyl-contained negative dielectric anisotropic liquid crystal medium and application thereof

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Embodiment Construction

[0058] Below in conjunction with embodiment the present invention is described in further detail:

[0059] The parts involved in the following examples are all percentages by weight, and the unit of temperature is ° C. The specific meanings and test conditions of other symbols are as follows:

[0060] S-N represents the melting point (°C) from the crystalline state of the liquid crystal to the nematic phase;

[0061] c.p. indicates the clearing point of the liquid crystal (°C), the test instrument: Mettler-Toledo-FP System Microthermal Analyzer;

[0062] γ1 is the rotational viscosity (mPa·s), and the test conditions are: 25°C, INSTEC: ALCT-IR1, 18 micron vertical box;

[0063] K 11 is the torsional elastic constant, K 33 is the stretch elastic constant, and the test conditions are: 25°C, INSTEC: ALCT-IR1, 18 micron vertical box;

[0064] △ε means dielectric anisotropy, △ε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric constant parallel to the molecular axis, ε ⊥ is the dielec...

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Abstract

The invention relates to a negative dielectric anisotropic liquid crystal composition which comprises a first component, a second component and a third component, wherein the first component is at least one compound selected from a negative dielectric anisotropic compound group as shown in Formula I; the second component is at least one compound selected from a negative dielectric anisotropic compound group as shown in Formula II; the third component is at least one compound selected from a neutral dielectric anisotropic compound group as shown in Formula III. According to the invention, the liquid crystal composition has excellent room-temperature and low-temperature solubility, light stability and thermal stability, and is suitable for liquid crystal display devices, especially FFS or IPS, MVA, PVA, PSVA, UV2A and other active matrix display devices based on VA effect.

Description

technical field [0001] The invention belongs to the field of liquid crystal materials, and relates to a liquid crystal medium containing a cyclopropyl negative dielectric anisotropic polar compound and its application in displays. Background technique [0002] Thin film transistor liquid crystal display (TFT-LCD) has gone through a long period of basic research. After realizing mass production and commercialization, it has become a mainstream product in LCD applications due to its advantages of lightness, lightness, environmental protection, and high performance: whether it is a small size Mobile phone screens, large-sized notebook computers (Notebook PC) or monitors (Monitor), and large-scale LCD TVs (LCD-TV), TFT-LCD applications can be seen everywhere. [0003] The early commercial TFT-LCD products basically adopted the TN display mode, and the biggest problem was the narrow viewing angle. With the increase of product size, especially in the application of TV field, IPS ...

Claims

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Application Information

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IPC IPC(8): C09K19/46C09K19/44G02F1/1333
CPCC09K19/063C09K19/44C09K19/46G02F1/1333G02F1/1337G02F1/13712
Inventor 高红茹孙轩非丰景义熊会茹翟媛媛宰亚孟
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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