Liquid crystal medium and application thereof

Abstract

The invention relates to the field of liquid crystal displays, in particular to a liquid crystal medium and application thereof. The liquid crystal medium comprises at least one compound shown as a general formula I and at least one compound shown as a general formula II, wherein the compound shown as the general formula I is a tricyclic compound containing a 2,3-difluorobenzene structure, and thestructure has a relatively large negative dielectric anisotropy and a high clearing point; the compound shown as the general formula II, provided by the invention, is a bicyclic compound containing a2,3-difluorobenzene structure, and the structure is a negative dielectric anisotropic liquid crystal compound which adopts a fluoroethoxy structure at a terminal so as to greatly enhance the dielectric anisotropy of the liquid crystal compound. The liquid crystal medium provided by the invention has low rotational viscosity, good low-temperature intersolubility and a short response time, is suitable for VA liquid crystal display devices such as VA/MVA/PVA/PSVA and IPS-mode and FFS-mode liquid crystal display devices, and is very effective for shortening the response time of liquid crystal displays.

Description

technical field [0001] The present invention relates to a kind of liquid crystal medium, specifically a kind of nematic phase liquid crystal composition, exactly the liquid crystal composition provided by the present invention has negative dielectric anisotropy, more precisely the liquid crystal composition provided by the present invention The liquid crystal composition contains a liquid crystal compound with a fluoroethoxy structure. The invention belongs to the field of liquid crystal material and its application. Background technique [0002] At present, liquid crystals have been widely used in the field of information display, and at the same time, some progress has been made in the application in optical communication (S.T.Wu, D.K.Yang. Reflective Liquid Crystal Displays. Wiley, 2001). In recent years, the application fields of liquid crystal compounds have been significantly expanded to various display devices, electro-optic devices, electronic components, sensors, e...

AI Technical Summary

Problems solved by technology

However, the response time problem of negative liquid crystals is a major problem encountered at present. The response time of FFS displays using negative liquid crystals is 50% or more slower than that of positive liquid crystal FFS displays.

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