Liquid crystal composition and liquid crystal display device

Abstract

The invention discloses a liquid crystal composition and a liquid crystal display device containing the liquid crystal composition. The liquid crystal composition comprises, by weight, 5 to 20% of at least one compound selected from compounds represented by general formula I-1 and / or general formula I-2, 10 to 25% of at least one compound represented by general formula II, 5 to 20% of at least one compound represented by general formula III, 10 to 35% of at least one compound represented by general formula IV, and 30 to 70% of at least one compound represented by general formula V. The liquid crystal composition possesses relatively wide nematic phase temperature range, relatively high optical anisotropy, dielectric anisotropy, and clearing point, low clearing point, and relatively high ultraviolet light stability and thermal stability, and is suitable to be applied in the liquid crystal display device; the liquid crystal display device possesses relatively excellent display contrast ratio, is capable of realizing quick response and saving electricity, and is suitable to be used at low temperature environment.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with a wide nematic phase temperature range, high optical anisotropy, high dielectric anisotropy, high clearing point, low viscosity and low temperature A liquid crystal composition with properties such as high storage stability, and a liquid crystal display device comprising the liquid crystal composition. Background technique [0002] Liquid crystal materials are mainly used as dielectrics in liquid crystal displays because the optical properties of such substances can be changed by an applied voltage. Liquid crystal based electro-optic devices are well known to those skilled in the art and can incorporate various effects. Examples of such devices are liquid crystal cells with dynamic scattering, DAP (distorted alignment phase) liquid crystal cells, guest / host type liquid crystal cells, TN cells with twisted nematic structure, STN (super twisted nema...

AI Technical Summary

Problems solved by technology

Since liquid crystals are usually used as a mixture of various components, the mutual solubility between the components is particularly important, and according to different battery types and application fields, liquid crystals must meet different requirements, such as conductivity, dielectric properties, etc. Anisotropy and optical anisotropy, etc., but the obvious disadvantages in the prior art are longer response time, lower resistivity and too high operating voltage, such as EP0673986, DE19528106, DE19528107

In addition, poor low temperature storage stability is also a defect of many existing liquid crystal materials, such as WO9732942A1

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