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Positive dielectric anisotropy liquid crystal combination with rapid response

A liquid crystal composition, anisotropic technology, applied in the directions of liquid crystal materials, nonlinear optics, optics, etc., can solve the problems of low charge retention, high voltage, slow response speed of TFT-LCD, etc., and achieve low viscosity and fast response. effect of time, appropriate optical anisotropy

Active Publication Date: 2013-08-21
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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Problems solved by technology

However, due to the limitations of the liquid crystal material itself, TFT-LCD still has many defects such as slow response speed, high voltage, and low charge retention rate.

Method used

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  • Positive dielectric anisotropy liquid crystal combination with rapid response
  • Positive dielectric anisotropy liquid crystal combination with rapid response
  • Positive dielectric anisotropy liquid crystal combination with rapid response

Examples

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Embodiment Construction

[0030] Below in conjunction with embodiment the present invention is described in further detail:

[0031] 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:

[0032] c.p. indicates the clearing point of the liquid crystal (°C); S-N indicates the melting point (°C) from the crystalline state to the nematic phase of the liquid crystal; Δn indicates the optical anisotropy, n o is the refractive index of ordinary light, n e is the refractive index of extraordinary light, test conditions: 589nm, 25°C; △ε means dielectric constant 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; τ represents the response time (ms), test instrument: DMS-501, test conditions: 25±0.5...

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Abstract

The invention discloses a positive dielectric anisotropy liquid crystal combination with rapid response. The positive dielectric anisotropy liquid crystal combination comprises 5-60 percent of first component, 1-50 percent of second component, 1-40 percent of third component, 0-40 percent of fourth component and an optically active compound, wherein the first component is formed from compounds with a structural formula I and a structural formula II, a compound with a structural formula III is used as the second component, a compound with a structural formula VI is used as the third component, a compound with a structural formula V is used as the fourth component, and the mass of the optically active compound is 0-0.2 percent of the mass sum of the liquid crystal combination. The liquid crystal combination has high charge retention, larger positive dielectric anisotropy, higher clearing point, good low-temperature stability, lower rotary viscometer and higher response speed and is particularly suitable for manufacturing active matrixes TN-TFT(Twisted Nematic-Thin Film Transistor), IPS (In-Plane Switching)-TFT liquid crystal display elements and liquid crystal displays.

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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IPC IPC(8): C09K19/46C09K19/44G02F1/1333
Inventor 华瑞茂夏治国丰景义王奎
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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