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Fast-response positive dielectric anisotropic liquid crystal composition

A liquid crystal composition, fast-response technology, applied in liquid crystal materials, chemical instruments and methods, etc.

Active Publication Date: 2014-01-15
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

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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  • Fast-response positive dielectric anisotropic liquid crystal composition
  • Fast-response positive dielectric anisotropic liquid crystal composition
  • Fast-response positive dielectric anisotropic liquid crystal composition

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Embodiment Construction

[0060] Below in conjunction with embodiment the present invention is described in further detail:

[0061] 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:

[0062] c.p. indicates the clearing point of the liquid crystal (°C);

[0063] S-N represents the melting point (°C) from the crystalline state of the liquid crystal to the nematic phase;

[0064] 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;

[0065] △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;

[0066] τ means response time (ms), test instrum...

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Abstract

The invention discloses a fast-response positive dielectric anisotropic liquid crystal composition which comprises the following components in percentage by weight: 5-60% of a component A, 1-60% of a component B, 1-40% of a component C and 0-40% of a component D. The component A consists of at least one compound of the general formula I and at least one compound of the general formula II, the component B consists of one or more compounds of the general formula III, the component C consists of one or more compounds of the general formula IV, the component D consists of one or more compounds of the general formula V. Further, an optically active component is added and accounts for 0-0.5% of the total weight of the liquid crystal composition. The composition has a low rotational viscosity, a fast response speed and an appropriate positive dielectric anisotropy, and is particularly suitable for the fabrication of fast-response active matrix TN-TRT, IPS-TFT liquid crystal display elements and liquid crystal display devices.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a fast-response positive dielectric anisotropy 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/52C09K19/44C09K19/46
Inventor 华瑞茂夏治国温刚员国良
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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