Liquid crystal composition, liquid crystal display element or liquid crystal display

Abstract

The invention discloses a negative dielectric anisotropy liquid crystal composition with a display mode of IPS or FFS, a liquid crystal display element containing the liquid crystal composition, and a liquid crystal display, and belongs to the field of liquid crystal display. The liquid crystal composition comprises 17-23% by mass of a compound represented by a formula I, 8-12% by mass of a compound represented by a formula II, at least two compounds represented by a formula III and having a total mass content of 15-20%, at least two compounds represented by a formula IV and having a total mass content of 8-12%, one or more compounds with the mass content of 9-13% as shown in a formula V and one or more compounds as shown in a formula VII. The liquid crystal composition disclosed by the invention has a relatively low ratio of rotary viscosity gamma 1 to elastic constant K and relatively large optical anisotropy n, and can be used for developing liquid crystal display elements or liquid crystal displays with quick response and low box thickness.

Description

technical field [0001] The disclosure belongs to the field of liquid crystal display, and more specifically relates to a negative liquid crystal composition and a liquid crystal display element or a liquid crystal display containing the liquid crystal composition. Background technique [0002] Display is the process of converting data information in the form of electrical signals into visual information in the form of visible light. At present, the display devices are Flat panel Display (FPD) and Liquid Crystal Display (LCD), and they have been commercialized. The working principle of the LCD is to pass the light emitted by the backlight through the polarizer, the glass plate and the liquid crystal molecules to produce the light and shade corresponding to the light to be displayed, so that the color changes to realize the image display. [0003] Currently in-plane switching (IPS), fringe-field switching (FFS) and vertical alignment (VA) are very competitive display modes in...

AI Technical Summary

Problems solved by technology

The response speed of prior art liquid crystal materials is limited by the rotational viscosity of liquid crystals γ 1 / Elastic constant K, therefore, it is necessary to try every means to reduce the rotational viscosity of the liquid crystal medium γ 1 At the same time, increase the elastic constant K to achieve faster response time

However, in actual research, it is found that rotational viscosity and elastic constant are a pair of relatively contradictory parameters. Reducing rotational viscosity will cause a decrease in elastic constant at the same time, and the goal of reducing response time cannot be achieved.

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