Liquid crystal composition for large-size liquid crystal display element or liquid crystal display

Abstract

The invention belongs to the technical field of liquid crystal materials, and particularly relates to a liquid crystal composition and a liquid crystal display element or a liquid crystal display containing the liquid crystal composition. The invention discloses a liquid crystal composition which comprises at least two of compounds as shown in a formula I, a formula II, a formula III, at least two compounds as shown in a formula IV, at least two of compounds as shown in a formula V and a polymerizable compound as shown in a formula VI. The liquid crystal composition provided by the invention has the characteristics of high dielectric, high K value, low rotary viscosity, high VHR and the like, and can be used for developing liquid crystal display elements or liquid crystal displays with low power consumption, low box thickness, quick response and high reliability. The liquid crystal composition provided by the invention also has a proper pretilt angle, and is especially suitable for large-size panel displays.

Description

technical field [0001] The invention relates to a liquid crystal composition used for a large-size liquid crystal display element or a liquid crystal display, and belongs to the field of liquid crystal materials. Background technique [0002] Currently there are various display modes in the market, and the more competitive display modes mainly include in-plane switching (IPS), fringe field switching (FFS) and vertical alignment (VA) display modes. Among these display modes, in-plane switching (IPS) and fringe field switching (FFS) are characterized by wide viewing angles. When the positive liquid crystal is used in these two types of display modes, it can obtain fast response and has good reliability. When the negative liquid crystal is used in these two types of display modes, it can obtain higher transmittance, but due to the negative The viscosity of the liquid crystal material is relatively large, so the response speed is relatively slow. [0003] The MVA display is di...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, a variety of liquid crystal compounds have been synthesized, but a single liquid crystal compound cannot meet the performance parameters required by various liquid crystal devices such as large dielectric anisotropy, low rotational viscosity and suitable optical anisotropy, so , the liquid crystal materials used as liquid crystal media are all liquid crystal compositions

Due to the fact that the performance of various aspects of liquid crystal materials is mutually restricted, such as using a low viscosity value can achieve fast response, but at the same time it will reduce the clearing point; increasing the dielectric anisotropy will increase the rotational viscosity and reduce VHR at the same time. It is difficult to take into account the low temperature performance while increasing the working temperature

Although there are liquid crystal compositions with relatively high negative dielectric anisotropy in the prior art, low-temperature miscibility, fast response, and high VHR characteristics cannot be taken into account at the same time.

For example: the compound proposed in CN10831507 has a great absolute value of negative dielectric anisotropy, but its response speed, power consumption and other aspects cannot fully meet the market demand

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