Liquid crystal composite and electro-optical display device comprising same

By adding indene rings and fluorinated structures to the liquid crystal composition, combined with medium polarity monomers and highly polar liquid crystal compounds, the problem of insufficient performance of existing liquid crystal compositions in low temperature environments is solved, and high clarifying point and wide range of properties are achieved. The nematic phase range and fast response time improve the low-temperature storage stability of the LCD.

CN102911673AActive Publication Date: 2013-02-06JIANGSU HECHENG DISPLAY TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU HECHENG DISPLAY TECH CO LTD
Filing Date
2012-10-13
Publication Date
2013-02-06

AI Technical Summary

Technical Problem

Existing liquid crystal compositions exhibit long response times, low resistivity, and narrow operating temperature ranges over a wide temperature range, resulting in poor performance of liquid crystal displays, especially at low temperatures and extreme environments.

Method used

By adding an indene ring and appropriate fluorination to the biphenyl liquid crystal structure, a medium polar small viscosity monomer and a highly polar liquid crystal-like compound are combined to form a liquid crystal composition, which improves its low-temperature solubility and dielectric properties. Anisotropy, and adding a low-viscosity neutral liquid crystal compound to the composition to optimize the low-temperature storage performance of the liquid crystal.

Benefits of technology

The high clearing point, wide nematic phase range, high resistivity, low rotational viscosity and fast switching time of the liquid crystal composition in a low-temperature environment are achieved, which significantly improves the low-temperature storage stability and response speed of the liquid crystal.

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Abstract

The invention provides a liquid crystal composite for an active-matrix-addressed electro-optical display device and application of the liquid crystal composite. The liquid crystal compound comprises a compound with a general formula (I) which occupies 10 percent to 30 percent of the total weight of the liquid crystal composite, a compound with a general formula (II) which occupies 5 percent to 30 percent of the total weight of the liquid crystal composite, a compound with a general formula (III) which occupies 10 percent to 40 percent of the total weight of the liquid crystal composite, and a compound with a general formula (IV) which occupies 10 percent to 60 percent of the total weight of the liquid crystal composite. The liquid crystal composite provided by the invention has a relatively high response speed and good low temperature storage stability. The invention further provides the active-matrix-addressed electro-optical display device comprising the liquid crystal composite.
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