Liquid crystal composition and liquid crystal display element having same

Abstract

The invention relates to a liquid crystal composition with low viscosity and proper high optical anisotropy and a liquid crystal display element having the same. The liquid crystal composite comprises 5 to 50 percent of compound I, 5 to 50 percent of compound II, 5 to 30 percent of compound II, 5 to 20 percent of compound IV, 0 to 15 percent of compound V and 0 to 20 percent of compound VI. The liquid crystal compound can be used for manufacturing the field sequential liquid crystal display element.

Description

technical field The present invention relates to a liquid crystal composition and a liquid crystal display element comprising the liquid crystal composition, in particular to a liquid crystal composition having a relatively low viscosity and a suitably high optical anisotropy (Δn) and a liquid crystal display element comprising the composition, especially It is a field sequential liquid crystal display element. Background technique As the most important flat-panel display device, liquid crystal display (LCD) develops rapidly and has increasingly wide applications. LCD has the advantages of light weight, thin shape, and low power consumption. Liquid crystal display devices can be divided into two types, one adopts the three-primary color filter method, and the other adopts the field sequential method. The field sequential method is also known as the sequential additive color mixing method. Its driving method is to divide a color picture (frame) into three pictures (fields)...

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Problems solved by technology

At present, there is no substance that can satisfy the aforementioned properties as a single compound

For the preparation of liquid crystal compositions, all these properties should be satisfied, so there are cases where the aforementioned properties cannot be satisfied due to small Δn or large viscosity

For example, in the liquid crystal composition disclosed by Chinese Patent Publication No. CN 1249736A, the minimum viscosity can be 13.8 (mPa·s), but its refractive index is 0.084, which cannot be used in the thickness of a small box in the FS mode; Chinese Patent No. CN1218451A discloses In the positive liquid crystal composition, the refractive index is 0.197, but its viscosity is 39.7 (mPa·s), and the response speed is not fast enough

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