Liquid crystal composition containing 2-methyl-3, 4, 5-trifluorobenzene structure and application thereof

Abstract

The invention belongs to the technical field of liquid crystal compositions, and particularly relates to a liquid crystal composition containing a 2-methyl-3, 4, 5-trifluorobenzene structure. The composition comprises one or more compounds represented by a general formula I, a compound represented by a general formula II and a compound represented by a general formula III. According to the invention, the elastic constant of the liquid crystal composition is increased by adding the compound represented by the general formula I, the dielectric anisotropy of the liquid crystal composition is improved by adding the compound represented by the general formula II, and the rotary viscosity is reduced by adding the compound represented by the general formula III. According to the present invention, the compound represented by the general formula I has characteristics of large elastic constant and low rotary viscosity, such that the elastic constant of the liquid crystal composition can be improved while the rotary viscosity is maintained unchanged so as to meet the high contrast ratio and the rapid response required by the liquid crystal display device.

Description

technical field [0001] The invention belongs to the field of liquid crystal compositions, in particular to a liquid crystal composition containing a 2-methyl-3,4,5 trifluorobenzene structure. Background technique [0002] At present, LCD display, as the most mainstream display, has been widely used in various products. Among them, IPS and FFS mode displays are widely used in mobile phones, notebook computers, and tablets because of their unique hard screen characteristics and very wide viewing angle characteristics. Computers, computer monitors, televisions, etc. [0003] The planar arrangement of IPS and FFS liquid crystals leads to light leakage easily in the dark state, and the contrast performance is obviously inferior to VA (MVA, PVA, UV2A, PSVA) displays. After research, it is found that when the liquid crystal molecules are initially aligned, due to the alignment debris on the surface of the alignment layer, the alignment of the liquid crystal molecules will be disor...

AI Technical Summary

Problems solved by technology

Increasing the clearing point of the liquid crystal composition can achieve the purpose of increasing the elastic constant, but as the clearing point increases, the rotational viscosity of the liquid crystal composition increases, resulting in a slower response time of the liquid crystal display

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