A liquid crystal composition, a liquid crystal display element and a liquid crystal display comprising the liquid crystal composition belong to the field of liquid crystal display. The liquid crystal composition comprises a compound represented by formula I with a mass content of 1-10% as the first component, a compound represented by formula II with a mass content of 1-20% as the second component, more than two compounds represented by formula III as the third component, more than three compounds represented by formula IV as the fourth component, and one or more polymerizable compounds as the fifth component, the crystal composition has low rotational viscosity and low γ.sub.1/K.sub.33 on the basis of maintaining appropriate optical anisotropy. When applied to liquid crystal display elements or liquid crystal displays, the liquid crystal display has a fast response speed. ##STR00001##

Disclosed are a polymer-stabilized liquid crystal composition and the use thereof. The composition comprises one or two polymerizable compounds represented by general formula I: (I), and further comprises a negative dielectric anisotropy liquid crystal composition, wherein the negative dielectric anisotropy liquid crystal composition has a dielectric anisotropy of Δε≤−1.5; and the added amount of the polymerizable compound(s) represented by general formula I is 0.1-0.5% of the total mass of the negative dielectric anisotropy liquid crystal composition. A polymer film formed after the polymerization of the provided liquid crystal composition containing the polymerizable compound(s) has a very good uniformity, such that the problem of liquid crystal displays having poor display can be improved. Moreover, an alignment film formed after the polymerization of the polymerizable liquid crystal composition has an excellent alignment force, and can improve residual image problems caused by an insufficient alignment force in a PSVA liquid crystal display. The provided liquid crystal composition containing the polymerizable compound(s) can realize an adjustable response speed, and can in turn meet the requirements of different technical process conditions.

##STR00001##

A liquid-crystal (LC) medium containing one or more dyes and one or more polymerizable compounds, its use for optical, electro-optical and electronic purposes, in particular in LC displays, especially in colour LC displays of the PSA (polymer sustained alignment) or SA (self-aligning) mode containing a quantum dot colour filter (QDCF), an LC display of the PSA or SA mode containing the LC medium and containing a QDCF, and to a process of manufacturing the LC display.

Liquid crystal mixtures containing a photoalignment component A) containing a photoreactive mesogen of formula I,

##STR00001## a liquid-crystalline component B) containing one or more nematogenic compounds, and a polymerizable component C) containing one or more polymerizable compounds of formula P,

P.sup.a-Sp.sup.a-(A.sup.p).sub.n2-Sp.sup.b-P.sup.b  P and a method of producing such LC media, the use of such media in LC devices, and LC devices containing such a LC medium, and further a process for the fabrication of such liquid crystal displays and the use of the liquid crystal mixtures for the fabrication of such liquid crystal display.

Liquid-crystalline (LC) media having positive dielectric anisotropy and liquid-crystal displays (LCDs) containing these media, especially displays addressed by an active matrix and in particular to LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA type.

The present invention relates to azo dye of formula I

##STR00001##

defined in claim 1, to a liquid crystalline medium comprising said azo dye, the use of said medium for optical, electrooptical and electronic purposes, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in windows. The invention further relates to a device containing the liquid crystalline medium according to the invention.

The present invention relates to compositions comprising a combination of benzothiadiazole and thiadiazoloquinoxaline derivatives, to liquid-crystalline media containing the compositions, and to the use of the compositions and the media in optical, electronic and electro-optical devices, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in switchable windows.

The disclosure provides a liquid crystal display (LCD) panel, a manufacturing method thereof, and an LCD device. The LCD panel adopts a structure with multiple electrodes and dual-frequency liquid crystals. When a temperature of the LCD panel is low (below 0° C.), the LCD panel is driven at high frequency, so that it emits more heat. Therefore, a working temperature of the LCD panel is increased without adding a heating element. LCD devices using such LCD panels have wide working temperature ranges, and are well suited to be used outdoors.

The present invention relates to liquid crystal (LC) media comprising one or more polymerisable compounds as further specified in the description or claims and a self-alignment additive for vertical alignment. The media are adapted for use in LC displays, especially in LC displays of the polymer-sustained alignment type.

A compound is represented by general formula (I), a liquid-crystal composition contains this compound, and devices are made using this liquid-crystal composition. Having a large refractive-index anisotropy Δn and a sufficiently high Tni, highly compatible with liquid-crystal compositions, and exhibiting a high dielectric anisotropy in the radio frequency range, the compound is a useful material for RF phase shifters, phased-array antennae, image recognition devices, distance meters, liquid-crystal displays, liquid-crystal lenses, and birefringent lenses for 3D image display, among other devices. ##STR00001##