Liquid crystal composition and its application

Abstract

The invention provides a liquid crystal composition and its application, which is prepared from the following raw materials: A-type compound, B-type compound and C-type compound; or from the followingraw materials: A-type compound and C-type compound; the A-type compound comprises at least one of compound I, compound II and compound III; the B-type compound comprises more than one of compound IVand compound V; the C-type compound includes more than one of compound VI compound VII and compound VIII. The liquid crystal composition provided by the invention has a wide nematic phase temperaturerange, especially widens the temperature range applied in low temperature, and also has a low viscosity, which is beneficial to improving the liquid crystal display effect and accelerating the response time. The liquid crystal composition of the invention simultaneously has appropriate optical anisotropy, high VHR, good reliability and thermal stability.

Description

technical field [0001] The invention belongs to the field of liquid crystal materials and relates to a liquid crystal composition, in particular to a liquid crystal composition and its application. Background technique [0002] Liquid crystal displays are widely used in many fields and play an important role in our daily life and national defense modernization. It utilizes the optoelectronic characteristics of liquid crystal materials, assists other materials, and completes the display under the action of an electric field. According to the different characteristics and working methods of liquid crystal materials, display elements can be divided into many types, among which TN (twisted nematic) mode, STN (super twisted nematic) mode, G-H (guest-host) mode, ECB mode, etc. are commonly used. (electrically controlled birefringence) mode, VA (vertical alignment) mode, IPS (in-plane switching) mode, etc. Generally speaking, the TN and STN mode display elements generally use pos...

AI Technical Summary

Problems solved by technology

[0008] 3. Low viscosity;

[0012] So far, no single liquid crystal material can meet the current display requirements, so it is necessary to mix various liquid crystal compounds together to form a liquid crystal composition to meet the display requirements, and the modulation of this composition is difficult. The performance of all aspects of the material is mutually restricted, so it is necessary to consider the comprehensive requirements to prepare a liquid crystal composition with excellent overall performance

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