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Positive dielectric anisotropic liquid crystal composition

A liquid crystal composition, anisotropic technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of appropriate optical anisotropy, low total response time, high resistivity and voltage retention

Active Publication Date: 2015-04-08
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, no single liquid crystal compound has been found that can meet the above performance requirements. It is necessary to combine multiple liquid crystal compounds into a liquid crystal composition to meet the performance requirements of liquid crystal display materials.

Method used

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  • Positive dielectric anisotropic liquid crystal composition
  • Positive dielectric anisotropic liquid crystal composition
  • Positive dielectric anisotropic liquid crystal composition

Examples

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Embodiment Construction

[0031] Below in conjunction with embodiment the present invention is described in further detail:

[0032] 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:

[0033] S→N represents the transition temperature (°C) from the crystal state of the liquid crystal to the nematic phase;

[0034] c.p. indicates the clearing point of liquid crystal (°C), tested by DSC quantitative method;

[0035] γ1 means rotational viscosity (mPa·s), test conditions: 25±0.5°C, 20 micron parallel box, test instrument: INSTEC:ALCT-IR1;

[0036] Δn means optical anisotropy, Δn=n o -n e , where n o is the refractive index of ordinary light, n e is the refractive index of extraordinary light, test conditions: 589nm, 25±2°C, test instrument: Abbe refractometer;

[0037] △ε means dielectric anisotropy, △ε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric constant parallel to ...

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Abstract

The invention discloses a positive dielectric anisotropic liquid crystal composition which comprises the following components in percentage by weight: 1 to 40 percent of liquid crystal compound shown as a structural formula I, 1 to 40 percent of liquid crystal compound shown as a structural formula II, 1 to 60 percent of liquid crystal compound shown as a structural formula III, 1 to 60 percent of liquid crystal compound shown as a structural formula IV, 0 to 20 percent of liquid crystal compound shown as a structural formula V and 0 to 20 percent of liquid crystal compound shown as a structural formula VI, wherein the sum of the weight percentage of the liquid crystal compounds shown as the structural formulas I, II, III, IV, V and VI is 100 percent; an optical rotation compound in an amount which is 0 to 0.2 percent of the total weight of the liquid crystal composition is also added. The liquid crystal composition has low power consumption, low rotary viscosity and high response speed, and is particularly suitable for manufacturing a thin film transistor-liquid crystal display (TFT-LCD) with quick response.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a positive dielectric anisotropy liquid crystal composition which can be used to manufacture fast-response TFT-LCDs. Background technique [0002] In recent years, liquid crystal displays have replaced traditional cathode ray tube displays and become mainstream products in the field of information display today, widely used in various displays such as instruments, computers, and televisions. According to different liquid crystal display methods, liquid crystal display elements can be divided into twisted nematic (TN) mode, super twisted nematic (STN) mode, in-plane (IPS) mode, vertical alignment (VA) mode and other modes. [0003] Thin Film Transistor Liquid Crystal Display (TFT-LCD) is one of the most promising display technologies in the 21st century and is widely used in notebook computers, LCD TVs and other fields. TFT-LCD is an active matrix display formed by introducing thin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/46
Inventor 张冠超贾刚刚华瑞茂夏治国孟劲松高红茹王东梅
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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