Liquid crystal composition for quick response TFT-LCD

A liquid crystal composition, fast response technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., to achieve the effect of appropriate optical anisotropy, low total response time, and appropriate positive dielectric anisotropy

Active Publication Date: 2014-05-21
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY 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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  • Liquid crystal composition for quick response TFT-LCD
  • Liquid crystal composition for quick response TFT-LCD
  • Liquid crystal composition for quick response TFT-LCD

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 mass percentages, and the temperature unit is ° C. The specific meanings and test conditions of other symbols are as follows:

[0033] c.p. indicates the clearing point of the liquid crystal (°C);

[0034] S-N represents the melting point (°C) from the crystalline state of the liquid crystal to the nematic phase;

[0035] 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;

[0036] △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;

[0037] τ means response time (ms), test instrument: DMS-...

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Abstract

The invention discloses a liquid crystal composition for a quick response TFT-LCD (Thin Film Transistor-Liquid Crystal Display). The liquid crystal composition comprises 1-4wt% of compound as shown in a general formula I, 1-70wt% of compound as shown in a general formula II, 1-70wt% of compound as shown in a general formula III, 0-40wt% of compound as shown in a general formula IV and 0-40wt% of compound as shown in a general formula V by mass percent, and also an optical-activity component, wherein the addition amount of the optical-activity component is lower than 0.2% of the sum of the weights of the liquid crystal compounds as shown in general formulae I, II, III, IV and V and not zero. The liquid crystal composition is low in rotary viscosity, high in response speed, appropriate in positive dielectric anisotropy, and especially applicable to manufacturing quick-response active matrix TN-TFT and IPS-TFT (In-Plane Switching-Liquid Crystal Display) liquid crystal display elements and liquid crystal displays. The general formulae I, II, III, IV and V are as shown in the specification.

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. At present, people's requirements for display technology are also constantly increasing, mainly reflected in the requirement that liquid crystal display technology has the characteristics of fast response, low driving voltage and low power consumption. [0003] As one of the important optoelectronic materials of liquid crystal display, liquid crystal material plays an important role in improving the performance of liquid crystal display. The liquid crystal materials used for display need to me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/46
Inventor 华瑞茂史子谦李雅敏温刚员国良
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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