Negative dielectric anisotropy liquid crystal medium containing cyclopropyl and application of liquid crystal medium

A dielectric anisotropy and liquid crystal medium technology, applied in liquid crystal materials, nonlinear optics, optics, etc., can solve the problems of poor mutual solubility of negative liquid crystal compounds, and achieve increased mutual solubility, large dielectric anisotropy, Improve the effect of black state

Inactive Publication Date: 2017-09-08
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 that the negative liquid crystal compound of the 2,3-difluorophenyl group of the substituent has 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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  • Negative dielectric anisotropy liquid crystal medium containing cyclopropyl and application of liquid crystal medium
  • Negative dielectric anisotropy liquid crystal medium containing cyclopropyl and application of liquid crystal medium
  • Negative dielectric anisotropy liquid crystal medium containing cyclopropyl and application of liquid crystal medium

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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 liquid crystal composition with negative dielectric anisotropy. The liquid crystal composition comprises at least one compound of which the first component is selected from compound population which has the negative dielectric anisotropy and is shown as a general formula I, at least one compound of which the second component is selected from compound population which has the negative dielectric anisotropy and is shown as a general formula II, and at least one compound of which the third component is selected from compound population which has the negative dielectric anisotropy and is shown as a general formula III. The liquid crystal composition has good normal / low-temperature intersolubility as well as light stability and thermal stability, is applicable to liquid crystal display devices, particularly applicable to application of active matrix displays based on a VA (Voltampere) effect, such as FFS (Fringe Field Switching) or IPS (Intrusion Protection System), MVA (Multi-domain Vertical Alignment), PVA (Patterned Vertical Alignment), PSVA (Polmer Stabilized Vertivally Aligned), UV2A (Ultraviolet induced multi-domain Vertical Alignment) and the like.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/46G02F1/1333
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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