US 10,767,113 B2 · Liquid crystal compound containing 2,3,4-trisubstituted benzene and composition thereof

Abstract

Provided is a liquid crystal compound containing 2,3,4-trisubstituted benzene, a liquid crystal composition thereof, and a liquid crystal display element or a liquid crystal display comprising the liquid crystal compound or the liquid crystal composition, wherein the liquid crystal composition has a lower viscosity, can achieve a quick response, and further has a moderate dielectric anisotropy Δε, a moderate optical anisotropy Δn, and high stability to heat and light. The liquid crystal display element or liquid crystal display comprising the liquid crystal composition has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good ultraviolet resistant property, a high charge retention rate, a low vapor pressure etc., and particularly, the liquid crystal compound or the liquid crystal composition has the advantage of a high light transmittance.

Claims15

Dependent claims

A liquid crystal composition, wherein the liquid crystal composition comprises one or more compounds of formula I and one or two compounds of formula II-B,

wherein R1 represents an alkyl group having a carbon atom number of 1-10, a fluoro-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluoro-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluoro-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluoro-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more non-connected CH2 in the groups represented by R1 may be substituted with cyclobutyl, cyclopropyl or —O—;
Y represents ethyl or vinyl;
R2 represents F, OCF3, OCHF2 or OCH2F;
each independently represent one of
and any fluorobenzene;
and
m and n each independently represent 1 or 2.

4 more elements

Dependencies are inferred from the claim text.

Liquid crystal compound containing 2,3,4-trisubstituted benzene and composition thereof

Life of this patent

Liquid crystal compound containing 2,3,4-trisubstituted benzene and composition thereof

Life of this patent

Abstract

Claims15