Liquid crystal composition with wide nematic phase and high response speed

Abstract

The invention provides a liquid crystal composition with a wide nematic phase and a high response speed. The liquid crystal composition is prepared from the following components in percentage by weight: 10%-50% of component A, 40%-70% of component B, 1%-30% of component C and 1%-20% of component D, wherein the sum of all the components in percentage by weight is 100%; the component A has a bicyclohexyl and terminal alkene structure and is low in birefringence, dielectric anisotropy, clearing point and the like, thereby being beneficial to improvement of the response speed of a liquid crystal material in a displayer; the component B and the component C are connected through cyclohexane and a benzene ring to serve as a skeleton and have a fluorine-containing substituent group for forming the liquid crystal nematic phase and inhibiting the generation of a smectic phase of a mixed liquid crystal material; and the component D has a polyfluoric terphenyl structure and plays a role of greatly lowering the threshold voltage of the mixed liquid crystal material. The liquid crystal composition is applicable to a liquid crystal displayer with positive dielectric anisotropy and especially applicable to a liquid crystal displayer of an IPS (In-Place Switching) mode.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition with fast response of wide nematic phase. Background technique [0002] Liquid crystal display elements represented by liquid crystal display panels and liquid crystal display modules utilize optical anisotropy, dielectric anisotropy, and the like of liquid crystal compounds. Known display modes are twisted nematic liquid crystal display (TN), super twisted nematic liquid crystal display (STN), bistable twisted nematic liquid crystal display (BTN), electronically controlled birefringent liquid crystal display (ECB), Optically Compensated Bending Liquid Crystal Display (OCB), In-Plane Switching Liquid Crystal Display (IPS), Vertical Alignment Liquid Crystal Display (VA) and Polymer Sequential Alignment Liquid Crystal Display (PSA), etc. [0003] Among these display modes, IPS display technology has attracted widespread att...

AI Technical Summary

Problems solved by technology

However, most of the required liquid crystal materials have disadvantages such as long response time, high viscosity, low resistivity, and high driving voltage.

In recent years, there have been many reports on liquid crystal materials for IPS displays. For example, the liquid crystal composition of patent document CN02126987.4 has large dielectric anisotropy and refractive anisotropy, but the rotational viscosity of the composition is relatively large, and the response time is long ; The liquid crystal composition of the patent document CN200710196406.1 has low rotational viscosity, fast response time, small threshold voltage, but the temperature range of the nematic phase is narrow; The anisotropy is larger, the viscosity is smaller, but the threshold voltage is higher

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