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Liquid crystal composition containing difluoromethylene ether compound

A technology of difluoromethylene ether and liquid crystal composition, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve low voltage, high temperature stability and UV stability, and improve quality

Inactive Publication Date: 2014-09-10
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS 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

[0079] Prepare the liquid crystal composition 1 of the present invention according to the compounds and weight percentages listed below,

[0080]

[0081]

[0082]Preparation of liquid crystal composition 1-1: the composition and content of liquid crystal composition 1 are basically the same, the difference is that the compound of general formula I are replaced with

[0083] Preparation of liquid crystal composition 1-2: the components and contents are basically the same as those of liquid crystal composition 1, the difference is that the compound of general formula I replace with

[0084] Liquid crystal composition 1, liquid crystal composition 1-1, and liquid crystal composition 1-2 were respectively filled between the two substrates of the liquid crystal display for performance testing. The test results are shown in the table below.

[0085] liquid crystal composition

[0086] From the above performance test parameters, it can be seen that the li...

Embodiment 2

[0091] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0092]

[0093]

[0094] Preparation of liquid crystal composition 2-1: the components and contents are basically the same as those of liquid crystal composition 2, the difference is that the compound of general formula I replace with replace with

[0095] (3) Preparation of liquid crystal composition 2-2: the components and content of liquid crystal composition 2 are basically the same, the difference is that the compound of general formula I replace with replace with

[0096] Liquid crystal composition 2, liquid crystal composition 2-1, and liquid crystal composition 2-2 were respectively filled between the two substrates of the liquid crystal display for performance testing. The test results are shown in the table below.

[0097] liquid crystal composition

[0098] From the above performance test para...

Embodiment 3

[0103] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0104]

[0105]

[0106] 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: 0.100; Δε: 10.0; γ 1 : 105.5mPa·s.

[0107] The liquid crystal composition has moderate birefringence, suitably high positive dielectric, very 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 a difluoromethylene ether compound. The liquid crystal composition comprises a component A, a component B and a component C, wherein the component A is formed by dielectric positive compounds shown in general formulas I and II; the component B is formed by compounds shown in one or more general formulas III; the component C is formed by compounds shown in one or more general formulas IV. The liquid crystal composition provided by the invention has excellent properties and has the characteristics of wider range of nematic phase temperature, proper dielectric anisotropy, proper optical anisotropy, high charge retention rate, high response speed, low rotary viscosity, low consumed power and the like, can be applied to liquid crystal display, and is especially suitable for fast responding active matrix TN-TFT (twisted nematic-thin film transistor) and IPS-TFT (in-plane switching-thin film transistor) displays.

Description

technical field [0001] The invention belongs to the field of liquid crystal compounds, and in particular relates to a liquid crystal composition containing dielectrically positive liquid crystal compounds 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 rate Δn; good compatibility with other liquid crystal compounds. [0003] As a liquid crystal material, it is required 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...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/46
Inventor 华瑞茂丰景义崔青孟劲松韩耀华
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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