Negative dielectric nematic liquid crystal composition and application thereof

Abstract

The invention relates to a negative dielectric nematic liquid crystal composition. The composition comprises at least one compound represented by a formula I, at least one compound represented by a formula II and at least one compound represented by a formula III, wherein the compound represented by the formula I is a 2,3-difluorobenzen-containing tricyclic compound which has high negative dielectric anisotropy and a high clearing point, the compound represented by the formula II is a dicyclic liquid crystal compound containing a methoxy bridge bond and a 2,3-difluorobenzene structure, and hashigh negative dielectric anisotropy and excellent mutual solubility, and the compound represented by the formula III is a bicyclic neutral monomer with very low rotary viscosity and excellent mutualsolubility, and can effectively reduce the rotary viscosity of the liquid crystal composition and improve the response time. The liquid crystal composition has low rotary viscosity, a high voltage retention rate, good low temperature mutual solubility, a fast response time and excellent application prospects.

Description

technical field [0001] The invention relates to a liquid crystal medium, specifically a nematic phase liquid crystal composition. Specifically, the liquid crystal composition provided by the invention has negative dielectric anisotropy, and belongs to the field of liquid crystal materials and their applications. Background technique [0002] Negative liquid crystal was first proposed in the late 1980s. It is mainly used in VA mode. VA display mode has excellent contrast performance, but there are obvious problems with viewing angle and response time. In order to solve the problem of viewing angle, MVA, PVA, CPA And other display technologies, the essence of these technologies is to use multi-domain to solve the viewing angle problem, and achieved good results. However, due to the increased difficulty of the process and the problem of response time, the display industry still plagued the display industry until the PSVA (Polymer Stabilized Vertical Alignment) technology was pr...

AI Technical Summary

Problems solved by technology

As people have higher and higher requirements for the response time of liquid crystal displays, simply relying on changing the mode to achieve fast response can no longer meet the requirements, so how to reduce the response time of liquid crystals has become a difficult point for PSVA display, specifically, the response of liquid crystal displays The time depends on the rotational viscosity and elastic constant of the liquid crystal composition

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