A liquid crystal composition, including at least one of: a first compound represented by Chemical Formula 1 below, a second compound represented by Chemical Formula 2 below; and a third compound represented by Chemical Formula 2 below: ##STR00001## The definitions of A, Z, n, R, and R are provided herein. Also provided is a liquid crystal display, including: a first display panel including a thin film transistor; a second display panel facing the first display panel; and a liquid crystal layer including at least one of a first compound represented by Chemical Formula 1, a second compound represented by Chemical Formula 2, and a third compound represented by Chemical Formula 2 and a reactive mesogen.

The present disclosure provides a display panel, a preparation method thereof, and a liquid crystal display. The display panel includes a first substrate, a second substrate opposite to the first substrate, a liquid crystal layer between the first substrate and the second substrate, and a polymerizable monomer arranged in the liquid crystal layer; wherein a plurality of polymer walls are arranged in the liquid crystal layer; the polymer wall contacts to the first substrate and the second substrate, and a polymerization direction of the polymerizable monomer in the polymer wall is substantially perpendicular to a thickness direction of the polymer wall. By arranging a plurality of polymer walls to limit the flow of the liquid crystal in a liquid crystal layer, improve an edge roughness of a polymer wall, so as to improve light leakage from an edge of pixels and improve a display effect.

The present invention relates to an LC medium comprising and a liquid-crystalline host consisting of an LC component H) comprising one or more mesogenic or liquid-crystalline compounds and an optically active component D) and optionally a polymerizable component P) comprising one or more polymerizable compounds; and to the use of the polymerizable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.

There is provided a liquid crystal composition having the following properties without reductions in refractive index anisotropy (n) and nematic phase-isotropic liquid phase transition temperature (T.sub.ni): sufficiently small viscosity (), sufficiently small rotational viscosity (1), a large elastic constant (K.sub.33), and negative dielectric anisotropy () with a large absolute value. There is also provided a liquid crystal display device of, for example, a VA type in which such a liquid crystal composition is used and which has a high response speed and excellent display quality with defective display being eliminated or reduced. The liquid crystal display device using the liquid crystal composition of the present invention is useful as an active-matrix liquid crystal display device and can be used in liquid crystal display devices of, for instance, a VA mode and PSVA mode.

Provided is a liquid crystal composition having at least one of, or a suitable balance regarding at least two of, characteristics such as a high maximum temperature, a low minimum temperature, small viscosity, suitable optical anisotropy and large dielectric anisotropy, and an AM device including the composition. The liquid crystal composition contains a specific compound having positive dielectric anisotropy as a first component, a specific compound having small viscosity as a second component, and may contain a specific compound having positive dielectric anisotropy as a third component, a specific compound having a high maximum temperature or small viscosity as a fourth component or a specific compound having negative dielectric anisotropy as a fifth component.

[Object] An object to be achieved by the present invention is to provide a liquid crystal display device that uses a liquid crystal composition having negative dielectric anisotropy, in which the liquid crystal composition can realize excellent display properties when used in the liquid crystal display device without degrading the image-sticking properties of the display device while realizing various liquid crystal display properties such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, low-temperature nematic phase stability, .sub.1, etc. [Solution] A liquid crystal composition is characterized in that it contains, as a first component, at least one compound selected from the group consisting of compounds represented by general formula (i), and, as a second component, at least one compound selected from the group consisting of compounds represented by general formula (ii).

A liquid crystal compound comprising a specific compound having a positive dielectric anisotropy as the first component, and a specific compound having a low viscosity as a second component. Further, the liquid crystal compound may contain a specific compound having a positive dielectric anisotropy as the third component, a specific compound having a maximum temperature or a low viscosity as the fourth component, or a specific compound having a negative dielectric anisotropy as the fifth component.

An object of the present invention is to provide a liquid crystal display element which is provided with a photo-alignment film, and does not deteriorate various properties, as a liquid crystal display element, such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, nematic phase stability at low temperature, and .sub.1, and burn-in characteristics of the display element. The present invention provides a liquid crystal display element which is excellent in stability at low temperature while maintaining high-speed responsiveness of the liquid crystal composition by using a liquid crystal composition containing a compound represented by General Formula (I) and a compound represented by General Formula (II). Provided is an FFS mode liquid crystal display element using a p-type liquid crystal composition.

Provided is a liquid crystal composition having at least one of, or a suitable balance regarding at least two of, characteristics such as a high maximum temperature, a low minimum temperature, small viscosity, suitable optical anisotropy and large dielectric anisotropy, and an AM device including the composition. The liquid crystal composition contains a specific compound having positive dielectric anisotropy as a first component, a specific compound having small viscosity as a second component, and may contain a specific compound having positive dielectric anisotropy as a third component, a specific compound having a high maximum temperature or small viscosity as a fourth component or a specific compound having negative dielectric anisotropy as a fifth component.

A liquid crystal composition, including at least one of: a first compound represented by Chemical Formula 1 below, a second compound represented by Chemical Formula 2 below; and a third compound represented by Chemical Formula 2 below:

##STR00001##

The definitions of A, Z, n, R, and R are provided herein. Also provided is a liquid crystal display, including: a first display panel including a thin film transistor; a second display panel facing the first display panel; and a liquid crystal layer including at least one of a first compound represented by Chemical Formula 1, a second compound represented by Chemical Formula 2, and a third compound represented by Chemical Formula 2 and a reactive mesogen.