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Positive dielectric-aeolotropic liquid crystal composition with fast response

A liquid crystal composition, anisotropic technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of excellent high temperature stability and ultraviolet stability, lower threshold voltage, and high charge retention rate

Active Publication Date: 2013-10-02
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Summary
  • 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.
[0008] The cyano-containing compounds commonly used in the past cannot meet the above requirements. Therefore, fluorine-containing liquid crystals with excellent performance have become one of the main components for preparing TFT-LCDs.

Method used

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  • Positive dielectric-aeolotropic liquid crystal composition with fast response
  • Positive dielectric-aeolotropic liquid crystal composition with fast response
  • Positive dielectric-aeolotropic liquid crystal composition with fast response

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with embodiments:

[0038] The parts involved in the following examples are percentages by weight, the temperature unit is °C, and the specific meanings and test conditions of other symbols are as follows:

[0039] c.p. indicates the clearing point of the liquid crystal (℃); S-N indicates the melting point (℃) from the crystalline state to the nematic phase of the liquid crystal; Δn indicates the optical anisotropy, Δn=n o -n e , Where n o Is the refractive index of ordinary light, n e It is the refractive index of extraordinary light, test conditions: 589nm, 25℃; △ε means dielectric anisotropy, △ε=ε ∥ -ε ⊥ , Where ε ∥ Is the dielectric constant parallel to the molecular axis, ε ⊥ It is the dielectric constant perpendicular to the molecular axis, test conditions: 25℃, 1KHz, HP4284A, 5.2 micron TN left-handed box; τ means response time (ms), test instrument: DMS-501, test conditions: 25±0.5℃, 5.2...

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Abstract

The invention discloses a positive dielectric-aeolotropic liquid crystal composition with fast response. The positive dielectric-aeolotropic liquid crystal composition comprises the following components in percentage by weight: 1%-40% of a liquid crystal compound shown in a structural formula I, 1%-40% of a liquid crystal compound shown in a structural formula II, 1%-40% of a liquid crystal compound shown in a structural formula III, 0%-70% of a liquid crystal compound shown in a structural formula IV, 0%-70% of a liquid crystal compound shown in a structural formula V, 0%-40% of a liquid crystal compound shown in a structural formula VI, and 0%-40% of a liquid crystal compound shown in a structural formula VII; in addition, an optical rotation compound with the weight of being 0%-0.5% of the total weight of all the liquid crystal compounds is added. The liquid crystal composition disclosed by the invention is low in power consumption, low in rotary viscosity and high in response speed, and is especially applicable for manufacturing a TFT-LCD Thin Film Transistor-Liquid Crystal Display) with fast response.

Description

Technical field [0001] The present invention relates to a liquid crystal composition, in particular to a positive dielectric anisotropic liquid crystal composition that can be used to manufacture fast response TFT-LCD. Background technique [0002] In the development process of information technology, display technology and display devices occupy a very important position; at the same time, as an important part of the information industry, liquid crystal displays are accelerating the process of flat-panelization. In recent years, liquid crystal displays have replaced traditional cathode ray tube displays and become mainstream products in the field of information display. They are widely used in various displays such as meters, computers, and televisions. [0003] According to different liquid crystal display modes, 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 ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46C09K19/30C09K19/20C09K19/34
Inventor 刘宏改丰景义华瑞茂徐凯夏治国史子谦戎晓彬
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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