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Liquid crystal composition containing difluoromethylene ether compound

A technology of difluoromethylene ether, liquid crystal composition, applied in liquid crystal materials, chemical instruments and methods, optics, etc., to achieve excellent high temperature stability and ultraviolet stability, low voltage, high resistivity and voltage retention rate. Effect

Active Publication Date: 2015-12-23
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is no single liquid crystal material used alone in liquid crystal displays that can meet the performance requirements without developing a composition with other performance characteristics

Method used

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  • Liquid crystal composition containing difluoromethylene ether compound
  • Liquid crystal composition containing difluoromethylene ether compound
  • Liquid crystal composition containing difluoromethylene ether compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The liquid crystal composition of the present invention is formulated according to the compounds and weight percentages listed below,

[0076]

[0077] The above liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing. The test results were: Cp: 100°C; S-N: ≤-40°C; Δn: 0.105; Δε: 8.6; γ 1 : 91.6mPa·s.

[0078] The liquid crystal composition has moderate birefringence, moderately high positive dielectric, low rotational viscosity, and fast response time, so it is very suitable for fast response TN-TFT, IPS-TFT and FFS-TFT displays.

Embodiment 2

[0080] The liquid crystal composition of the present invention is formulated according to the compounds and weight percentages listed below,

[0081]

[0082] The above liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing. The test results were: Cp: 99°C; S-N: ≤-40°C; Δn: 0.095; Δε: 7.8; γ 1 : 94.6mPa·s.

[0083] The liquid crystal composition has moderate birefringence, moderately high positive dielectric, low rotational viscosity, and fast response time, so it is very suitable for fast response TN-TFT, IPS-TFT and FFS-TFT displays.

Embodiment 3

[0085] The liquid crystal composition of the present invention is formulated according to the compounds and weight percentages listed below,

[0086]

[0087] Perform the performance test by filling the above liquid crystal composition between the two substrates of the liquid crystal display. The test results are: Cp: 100°C; S-N: ≤-40°C; Δn: 0.100; Δε: 10.0; γ 1 : 105.5mPa·s.

[0088] The liquid crystal composition has moderate birefringence, moderately high positive dielectric, low rotational viscosity, and fast response time, so it is very suitable for fast response TN-TFT, IPS-TFT and FFS-TFT displays.

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Abstract

The invention discloses a liquid crystal composition containing difluoromethylene aether group compounds, which comprises a component A, a component B and a component C, wherein the component A is composed of dielectric positive compounds disclosed as general formula I and general formula II, the component B is composed of one or more compounds disclosed as general formula III, and the component C is composed of one or more compounds disclosed as general formula IV. The liquid crystal composition disclosed by the invention has excellent properties, and has the characteristics of wide nematic-phase temperature range, proper positive dielectric anisotropy, proper optical anisotropy, very high charge retentivity, high response speed, low rotary viscosity, low consumed power and the like. The composition is applicable to liquid crystal display, and is especially suitable for quick-response active matrix TN-TFT (twisted nematic thin film transistor) and IPS-TFT (in-plane switching-thin film transistor) display devices. The parameters in the general formulae are defined in the specification.

Description

Technical field [0001] The invention belongs to the field of liquid crystal compounds, and in particular relates to a liquid crystal composition containing a dielectric positive liquid crystal compound used in liquid crystal displays. Background technique [0002] Liquid crystal display elements are divided into the following modes according to the display mode: twisted nematic (TN) mode, super twisted nematic (STN) mode, in-plane mode (IPS), and vertical alignment (VA) mode. Regardless of the display mode, the liquid crystal composition needs to have the following characteristics: stable chemical and physical properties; low viscosity; suitable Δε; suitable refraction ratio Δn; and good compatibility with other liquid crystal compounds. [0003] As a liquid crystal material, it needs to have good chemical and thermal stability, as well as stability to electric fields and electromagnetic radiation. As a liquid crystal material for thin film transistor technology (TFT-LCD), it not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/46G02F1/1333
Inventor 华瑞茂夏治国孟劲松温刚
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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