A negative dielectric anisotropy liquid crystal composition and applications thereof

By using a negative dielectric anisotropic liquid crystal composition with a specific structure of compounds and antioxidants, the stability problem of VA display mode liquid crystal display devices under high temperature, ultraviolet light and high brightness backlight conditions was solved, and a liquid crystal display device with fast response and high stability was realized.

CN115725304BActive Publication Date: 2026-06-02SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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Patent Information

Application Number
CN202111014841.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-08-31
Publication Date
2026-06-02
Estimated Expiration
2041-08-31

AI Technical Summary

Technical Problem

The liquid crystal materials in existing VA display mode liquid crystal display devices are not stable enough under high temperature, ultraviolet light and high brightness backlight conditions, and cannot meet the requirements of high contrast and fast response.

Method used

A negative dielectric anisotropic liquid crystal composition containing compounds with specific structures and antioxidants is used to improve the photothermal stability of liquid crystal materials. Furthermore, by optimizing the component ratio and preparation method, the stability and response speed of liquid crystal display devices are enhanced.

Benefits of technology

It achieves high stability and fast response of liquid crystal display devices under high temperature, ultraviolet light and high brightness backlight conditions, reduces image retention, and improves the overall performance of liquid crystal displays.

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Abstract

The present application relates to a kind of negative dielectric anisotropy liquid crystal composition and its application, the negative dielectric anisotropy liquid crystal composition includes at least one compound shown in formula I, at least one compound shown in formula III and antioxidant, the antioxidant is selected from at least one compound shown in formula V, or it is the mixture of compound M and at least one compound shown in formula V.The application relates to a kind of negative dielectric anisotropy liquid crystal composition, by the mutual cooperation of each component, so that the negative dielectric anisotropy liquid crystal composition has higher photo-thermal stability, lower rotational viscosity, wider nematic phase temperature range and larger optical anisotropy and larger dielectric anisotropy.Compared with existing antioxidant M, by adding the antioxidant shown in formula V with specific structure in the present application, the photo-stability and thermal stability of the negative dielectric anisotropy liquid crystal composition are significantly improved.
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