Liquid crystal medium composition

Abstract

The invention discloses a liquid crystal medium composition, which comprises a negative type liquid crystal material, a stabilizing agent and a reactive monomer capable of performing polymerization under ultraviolet irradiation, wherein the reactive monomer accounts for 0.1%-1% of liquid crystal medium composition according to weight. The reactive monomer at least comprises a reactive monomer descried as a general formula (1) and a reactive monomer descried as a general formula (2), the reactive monomer descried as a general formula (1) accounts for 5%-85% of total amount of the responsive monomer according to mole ratio, a single polymer monomer and a poly polymer monomer in the liquid crystal medium composition can form a polymer under the ultraviolet irradiation, the reaction speed is moderate, the oversized volume of polymer granules can be avoided, loose accumulation can be avoided, the generation of adverse orientation of the liquid crystal and dark state light point phenomenon of a liquid crystal panel can be avoided, and the contrast and optical effect of a liquid crystal display apparatus can be increased. P-L1-X-L2-M_(1).

Description

technical field The invention relates to the technical field of liquid crystal display devices, in particular to a liquid crystal medium composition applied to liquid crystal display devices. Background technique The liquid crystals used in twisted nematic (Twisted nematic, TN) or STN (Super twisted nematic) liquid crystal display devices are positive liquid crystals. Among them, STN refers to the use of an electric field to change the arrangement of liquid crystal molecules that were twisted above 180 degrees to change the optical rotation state. When the positive liquid crystal is not powered, the long axis of liquid crystal molecules is parallel to the surface of the substrate. The alignment direction of the liquid crystal molecules on the substrate surface is determined by the rubbing direction of the alignment layer. Since the alignment directions of the two substrate surfaces are vertical, the molecules of the liquid crystal layer between the two basic surfaces are co...

AI Technical Summary

Problems solved by technology

However, the use of Monomer containing two polymerizable groups can easily cause PSVA panels to produce bright spots that are visible in the dark state, as shown in Figure 3, which reduces the contrast of the LCD panel.