Negative dielectric liquid crystal composition and display device thereof

CN122302898APending Publication Date: 2026-06-30CHONGQING HALATION SEIKO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING HALATION SEIKO TECH CO LTD
Filing Date
2024-12-31
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional negative liquid crystal materials have a small vertical dielectric constant, resulting in small liquid crystal storage capacitance, low transmittance, low contrast, slow response speed, and insufficient low-temperature stability.

Method used

A negative liquid crystal composition employing a dielectric negative compound with intermediate negative groups and meta-terminal groups, comprising dielectric negative components I, II, III, and IV, optimizes the dielectric properties and compatibility of the liquid crystal composition.

Benefits of technology

It improves the vertical dielectric constant and dielectric negativity of the liquid crystal, reduces the response time, increases transmittance and contrast, enhances low-temperature stability, and improves compatibility with other components.

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Abstract

This invention relates to a negative dielectric liquid crystal composition and its display device, belonging to the field of liquid crystal materials. The negative dielectric liquid crystal composition comprises at least one dielectric negative compound with the structure shown in general formula I: wherein R1 represents an alkyl group of 1-12 carbon atoms, an alkoxy group of 1-12 carbon atoms, or an alkenyl group of 2-12 carbon atoms; R2 represents an alkyl group of 1-12 carbon atoms or an alkenyl group of 2-12 carbon atoms; Z1 represents a C-C single bond, -CH2CH2-, -OCH2-, or -CH2O-. The liquid crystal composition of this invention exhibits a large vertical dielectric constant ε⊥, a high ε⊥ / |Δε| ratio, good transmittance, high contrast, and a large K33. Simultaneously, the liquid crystal composition of this invention possesses good low-temperature storage stability and low rotational viscosity, which can reduce the response time of liquid crystal displays.
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