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Difluoromethoxy ether-containing positive dielectric liquid crystal composition

A technology of difluoromethoxy ether and liquid crystal composition, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of low voltage, appropriate optical anisotropy, and low total response time

Active Publication Date: 2013-10-02
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Difluoromethoxy ether-containing positive dielectric liquid crystal composition
  • Difluoromethoxy ether-containing positive dielectric liquid crystal composition
  • Difluoromethoxy ether-containing positive dielectric liquid crystal composition

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with specific embodiments. Each component used in the following examples can be synthesized by known methods or obtained through commercial channels. In the following examples, the preparation of the liquid crystal composition is synthesized according to well-known conventional methods, such as heating, ultrasonication, suspension, etc., and mixed according to the specified ratio.

[0043] The percentages in this manual are percentages by mass, and the temperature is in degrees Celsius (°C). The specific meanings and test conditions of other symbols are as follows:

[0044] c.p. (°C) represents the clearing point of liquid crystal; S-N represents the melting point (°C) of liquid crystal from crystalline state to nematic phase; △n is optical anisotropy, no is the refractive index of ordinary light, and ne is the refractive index of extraordinary light , the test conditions are: 589nm, 25°C; △...

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Abstract

The invention discloses a difluoromethoxy ether-containing positive dielectric liquid crystal composition which comprises the following ingredients in percentage by weight: 1%-60% of component A shown in general formulas I and II and including dielectric positive compounds, 1%-60% of component B shown in the general formula IV and including a dielectric positive compound or shown in general formulas III and IV and including dielectric positive compounds, and 10%-80% of component C dielectric neutral compound shown in the general formula V, in addition, an optical activity compound is added in difluoromethoxy ether-containing positive dielectric liquid crystal composition and takes up 0-0.5% of mass sum of the liquid crystal composition. The difluoromethoxy ether-containing positive dielectric liquid crystal composition has characteristics of being low in viscosity, fast in response time, proper in optical aeolotropism and dielectric aeolotropism, and excellent in high temperature resistance property, is especially applicable to manufacture of fast responded active matrix TN-TFT (Twisted Nematic-Thin Film Transistor), IPS (In-Plane Switching)-TFT or FFS (Fringe Field Switching) liquid crystal display elements and liquid crystal displays.

Description

technical field [0001] The invention relates to a liquid crystal compound, in particular to a positive dielectric liquid crystal composition containing difluoromethoxy ether. Background technique [0002] Liquid crystal display elements can be divided into the following modes according to different display methods: twisted nematic (TN) mode, super twisted nematic (STN) mode, in-plane mode (IPS) mode, vertical alignment (VA) mode and thin film transistor (TFT) mode, etc. Among them, the TFT mode is the fastest-growing display mode in the past 10 years, and the thin-film transistor display (TFT-LCD) has also rapidly grown into the mainstream display, which is inseparable from its advantages. Its advantages are: [0003] 1. Good use characteristics: 1) It can be applied under low voltage, and the driving voltage is low; 2) It is flat, not only light and thin, but also saves a lot of raw materials and space; 3) Low power consumption; 4) Resolution, color fidelity , high brigh...

Claims

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Application Information

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IPC IPC(8): C09K19/30C09K19/44
Inventor 华瑞茂王奎夏治国张建立郑成武
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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