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Quick-responsive liquid crystal composition

A liquid crystal composition, fast response technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of proper optical anisotropy, wide application range, excellent high temperature stability and ultraviolet stability

Active Publication Date: 2014-01-22
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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Examples

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Effect test

Embodiment Construction

[0036] Below in conjunction with embodiment the present invention is described in further detail:

[0037] 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:

[0038] c.p. indicates the clearing point of the liquid crystal (°C);

[0039] S-N represents the melting point (°C) from the crystalline state of the liquid crystal to the nematic phase;

[0040] 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°C;

[0041] △ε means dielectric anisotropy, △ε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric constant parallel to the molecular axis, ε ⊥ is the dielectric constant perpendicular to the molecular axis, test conditions: 25°C, 1KHz, HP4284A, 5.2 micron TN left-handed cell;

[0042] τ means response time (ms), test instrum...

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Abstract

The invention discloses a quick-responsive liquid crystal composition which comprises 50-60wt% of a component A, 1-50wt% of a component B, 1-40wt% of a component C and 0-40wt% of a component D, wherein the compound in formula I in the component A accounts for 1-50wt% of the liquid crystal composition, and the compound in formula II in the component A accounts for 1-50wt% of the liquid crystal composition; the sum of the weight percentage of A, B, C and D is 100%; in addition, 0-0.2% of a component with optical activity based on weight of the liquid crystal composition is further added. The composition has low rotary viscosity, high response speed and appropriate positive dielectric anisotropy, and is particularly applicable to active matrixes TN-TFT (Twisted Nematic-Thin Film Transistor) and IPS-TFT (In-Plane Switching-Thin Film Transistor) liquid crystal display elements and liquid crystal displays quick to respond.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a fast-response nematic liquid crystal composition which can be used for manufacturing TFT-LCD. 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 film transistor swit...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/46C09K19/30C09K19/34
Inventor 华瑞茂夏治国郑成武张建立孟劲松
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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