Liquid crystal composition and its application

Abstract

The invention discloses a liquid crystal composition containing a liquid crystal compound containing a cyclopropyl group. Liquid crystal compounds containing cyclopropyl not only have positive dielectric anisotropy (Δε), suitable optical anisotropy (Δn), suitable clearing point (CP), good low-temperature miscibility with other liquid crystals, and low Rotational viscosity, and has good stability to ultraviolet light and high temperature. And it can solve the problems of weakened alignment force, uneven display, light leakage and other problems caused by the current panel manufacturing process, and can improve the contrast and response time of the TFT panel at low temperature. The liquid crystal compositions disclosed in the present invention can be used in active matrix displays.

Description

technical field [0001] The invention belongs to the application field of liquid crystal materials, and in particular relates to a liquid crystal composition and the application of the liquid crystal composition. Background technique [0002] Since the Austrian scientist Leinitzer first synthesized liquid crystals in 1888, the real development of the liquid crystal industry has been in the past 30 years. Due to the obvious advantages of liquid crystal display materials, such as low driving voltage, small power consumption, and reliability High, large display information, color display, no flicker, can realize flat panel display, etc., liquid crystal monomers and liquid crystal displays have experienced tremendous development, liquid crystal monomers have now synthesized more than 10,000 kinds of liquid crystal materials, of which commonly used There are thousands of liquid crystal display materials, which are classified according to the characteristics of the central bridge a...

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Problems solved by technology

However, due to its active light emission, the human eyes are directly stimulated by the light source, and people will feel tired after watching for a long time, which is not conducive to health. However, the liquid crystal material in the liquid crystal display prevents the light source from illuminating the eyes. At the same time, by thinning the backlight, The glass substrate can make it as light and thin as OLED, but due to the liquid crystal material, it is greatly affected by temperature and is sensitive to light and heat. At the same time, the alignment process leads to a decrease in contrast and becomes a short board of LCD.

[0008] The application of the cyclopropyl structure to liquid crystal compounds has also been reported in the literature, but the compounds in the literature have relatively large defects in performance, such as poor structural stability, high viscosity, and difficult synthesis, so they have not been practically applied so far.

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