Ultra-wide range temperature and high-weatherability liquid crystal composition and display thereof

Abstract

The invention provides an ultra-wide range temperature liquid crystal composition which comprises the following components by weight percent: 1-20 percent compound of general formula I, 10-60 percent of compound of general formula II, 5-30 percent of compound of general formula III, 10-50 percent of compound of general formula IV, and 1-25 percent of compound of general formula V. The liquid crystal composition has the advantages of extensive nematic-phase temperature range, superhigh clearing point, low melting point, lower rotary viscosity, suitable optical anisotropy, applicable dielectric anisotropy, higher response speed, favorable low-temperature storage stability, favorable UV resistance and thermal stability, can be used for outdoor and high-altitude liquid crystal display, also for environments where the temperature is high, and UV light radiation is strong, or the temperature is extremely low, including polar regions, high-altitude, plateau, tropical zones, deep sea area, or for special display field in similar harsh regions, and has favorable weatherability. The invention further provides a liquid crystal display 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 a wide temperature range of nematic phase, high transparency point, appropriate optical anisotropy, storage stability at very low temperature and fast response speed, and the use of the liquid crystal composition Object liquid crystal display element. Background technique [0002] Liquid crystal material is a mixture of organic rod-shaped small molecular compounds that have both fluidity of liquid and anisotropy of crystal at a certain temperature. Liquid crystal materials can be divided into normal temperature liquid crystals (phase transition temperature range: -10°C to 60°C) and wide temperature liquid crystals (phase transition temperature range: -20°C to 70°C) according to the phase transition temperature. Liquid crystal displays made of liquid crystal materials with different temperatures have different application locations. [000...

AI Technical Summary

Problems solved by technology

[0005] Currently, CN-based liquid crystal materials commonly used in wide-temperature liquid crystal materials have poor weather resistance and UV resistance. Large range, high ultraviolet intensity, containing CN liquid crystal material tends to absorb impurity ions and generate many free radicals, resulting in an increase in ion concentration (ION) and a decrease in voltage retention rate (VHR). Long-term use under this condition will show Bad; and the viscosity of the liquid crystal material containing the CN group is relatively high, which will cause the response speed of the liquid crystal display to be slow

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