Quick-response liquid crystal composition

A liquid crystal composition and fast-response technology, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems that the liquid crystal display cannot work in a high temperature environment, the liquid crystal display cannot display normally, and the reliability performance of high and low temperature is reduced, and achieves Appropriate optical anisotropy, excellent stability, and high charge retention

Active Publication Date: 2013-09-11
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the various performances of liquid crystal materials are mutually restricted. Accelerating the response speed will often bring about a decrease in the clearing point, resulting in the failure of the liquid crystal display to work in a high temperature environment, and the reduction of high and low temperature reliability. not displaying properly

Method used

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  • Quick-response liquid crystal composition

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Experimental program
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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with embodiments.

[0025] The percentages in this manual are all mass percentages; the temperature is in degrees Celsius (℃); the specific meanings and test conditions of other symbols are as follows:

[0026] cp (℃) represents the clearing point of the liquid crystal; SN represents the melting point (℃) from the crystalline state of the liquid crystal to the nematic phase (℃); △n is the optical anisotropy, no is the refractive index of ordinary light, and ne is the refractive index of extraordinary light , The test conditions are: 589nm, 25℃; △ε is the 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, the test conditions are: 25℃, 1KHz, HP4284A, 4.0 micron TN left-handed box; τ is the response time (ms), the test instrument is DMS-501, and the test conditions are: 25±...

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Abstract

The invention discloses a quick-response liquid crystal composition which comprises 1-80% of component A composed of dielectric positive compounds disclosed as general formula I and general formula II, 1-80% of component B disclosed as general formula III, 1-80% of component C disclosed as general formula IV, 0-30% of component D disclosed as general formula V, and component E disclosed as general formula VI. Besides, an optical rotation compound, which accounts for 0-1.0 wt% of the liquid crystal composition, is also added. The quick-response liquid crystal composition disclosed by the invention has the advantages of moderately high positive dielectric anisotropy, wide nematic phase range, very high charge retentivity, low power consumption, low rotary viscosity, quick response time and appropriate optical anisotropy, is suitable for active matrix and passive matrix electro-optic elements and liquid crystal displays, and can be used for manufacturing quick-response TFT-LCDs (thin film transistor-liquid crystal displays).

Description

Technical field [0001] The invention relates to a liquid crystal composition, in particular to a fast response liquid crystal composition. Background technique [0002] Liquid crystal material is a mixture that has both liquid fluidity and crystal anisotropy at a certain temperature. According to the different properties of liquid crystal materials, most liquid crystal materials of various phases have been developed for use in liquid crystal display devices. [0003] The response speed is an important evaluation index of the liquid crystal display. If the response speed is too slow, the display screen will appear smear phenomenon. Therefore, the liquid crystal display is required to have a fast response speed. In order to improve the response speed of the liquid crystal display, methods such as reducing the cell thickness, improving the driving method, providing a high driving voltage, and adopting a liquid crystal composition with fast response can be selected. But no matter wha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/46
Inventor 乔云霞刘宏改温刚夏治国高红茹董岩华瑞茂王奎
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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