Liquid crystal composition and liquid crystal display device thereof

Abstract

The invention provides a liquid crystal which comprises at least one compound disclosed as general formula I, at least one compound composed of general formula II-1, general formula II-2 and combination thereof, at least one compound disclosed as general formula III, and at least one compound composed of general formula IV-1, general formula IV-2, general formula IV-3 and combination thereof. The liquid crystal composition provided by the invention has the advantages of high dielectric anisotropy, relatively low rotary viscosity, appropriate refractivity anisotropy and excellent low-temperature storage stability, and is suitable for IPS (in-plane switching), FFS (fringe field switching) and other display modes and especially suitable for low-power-consumption IPS and FFS display. The invention also provides an active matrix liquid crystal display device comprising the liquid crystal composition.

Description

technical field [0001] The present invention relates to a liquid crystal composition, in particular to a liquid crystal composition with large dielectric anisotropy, relatively small rotational viscosity, suitable refractive index anisotropy and excellent low-temperature storage stability and its application in Applications in active matrix liquid crystal display devices. Background technique [0002] The liquid crystal display element works by utilizing the optical anisotropy and dielectric anisotropy possessed by the liquid crystal material itself, and has been widely used at present. Utilizing the different characteristics and working modes of liquid crystal materials, the device can be designed into various working modes. Among them, the TN mode (that is, the twisted nematic mode - the liquid crystal mixture has a nematic type twisted about 90 degrees) is commonly used in conventional displays. structure), STN (that is, super twisted nematic mode), SBE mode (that is, su...

AI Technical Summary

Problems solved by technology

[0004] From the perspective of liquid crystal composition material modulation, the various properties of the material (low optical birefringence value, high dielectric anisotropy value, high resistivity, low rotational viscosity, low melting point, good thermal Stability and UV stability, etc.) are mutually restrained, improving some aspects of performance is often accompanied by a decrease in other aspects of performance, and it is often very difficult to prepare a liquid crystal composition with suitable properties in all aspects

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