Liquid crystal composition and application thereof

Abstract

The invention discloses a liquid crystal composition and application thereof. The liquid crystal composition comprises: at least one compound of general formula I and at least one compound of generalformula I'. The liquid crystal composition provided by the invention has suitable optical anisotropy, has relatively high bright spot, and has relatively large elastic constants K11 and K33 while maintaining relatively high clearing point and relatively low dielectric anisotropy and good low-temperature clearing point. When applied to liquid crystal displays, the liquid crystal composition can show the advantages of fast response, high contrast, wide temperature range, etc.

Description

technical field [0001] The present invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and its application. Background technique [0002] Liquid Crystal Display (LCD) has achieved rapid development due to its small size, light weight, low power consumption and excellent display quality, and is especially widely used in portable electronic information products. As the size of liquid crystal screens for portable computers, office applications, and video applications increases, liquid crystal displays can be used for large screen displays and eventually replace cathode ray tube (CRT) displays. [0003] According to the type of display mode, it is divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electronically controlled birefringence), OCB (optically compensated bend), IPS (in-plane switching, co...

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Problems solved by technology

In the existing liquid crystal composition, better characteristics can be obtained, but this type of composition has a low clearing point, high viscosity, insufficient optical anisotropy, low absolute value of dielectric anisotropy, and low voltage retention. Low, it is not very helpful to mix into a composition with large optical anisotropy, suitable absolute value of dielectric anisotropy, good stability and good contrast, which directly leads to low contrast, slow response speed and device display effect Poor adverse consequences, such as foreign patent documents WO9202597, WO9116398, WO9302153, WO9116399, Chinese patent document CN1157005A, etc., have the above disadvantages to varying degrees

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