82results about How to "Large elastic constant" patented technology

The invention relates to the liquid crystal field, and especially relates to a liquid crystal composition and applications thereof in the liquid crystal display field. The liquid crystal composition is composed of the following compounds in parts by weight: 5 to 40 parts of one or more compounds represented by the formula I, 2 to 30 parts of one or more compounds represented by the formula II, and 20 to 70 parts of one or more compounds represented by the formula III, and may also comprises 4 to 30 parts of one or more compounds represented by the formula IV, or / and 5 to 25 parts of one or more compounds represented by the formula V to IX. By the cooperation among the compounds, the rotation viscosity of the liquid crystal composition can be effectively reduced, the related performances of mixed liquid crystal are improved, and thus the responding time is reduced. The provided liquid crystal composition can be used to produce quick response liquid crystal display with a plurality of display modes.

　The present invention pertains to a nematic liquid crystal composition having negative dielectric anisotropy (Δε), containing a polymerizable compound, and useful as a liquid crystal display material, and pertains to a liquid crystal display element in which the nematic liquid crystal composition is used. This liquid crystal composition is obtained by polymerizing a polymerizable compound without inhibiting the formation of a pretilt angle in liquid crystal molecules by irradiation with ultraviolet rays in order to produce an element, and can provide a fast-response PSA-type display element in which the pretilt angle is adequately imparted thereby, satisfactory orientation stability is obtained, display defects are absent or inhibited, and high display quality is obtained. A liquid crystal display element in which this liquid crystal composition is used can serve as a liquid crystal display element for active matrix driving, and can be applied to PSVA-mode liquid crystal display elements.

The present invention pertains to: a nematic liquid crystal composition that is useful as a liquid crystal display material and exhibits negative dielectric anisotropy (Δε); and a liquid crystal display element that uses the nematic liquid crystal composition. This liquid crystal composition has a viscosity (η) that is sufficiently small, a rotational viscosity (γ1) that is sufficiently small, an elastic constant (K33) that is large, and has a negative dielectric anisotropy (Δε) with a large absolute value, without reducing the refractive index anisotropy (Δn) and nematic phase-isotropic liquid phase transition temperature (Tni). Furthermore, the liquid crystal composition is capable of providing a liquid crystal display element that provides a high response speed and excellent display quality, and minimizes or eliminates display defects in vertical-alignment displays, and the like, in which the liquid crystal display element is used. The liquid crystal display element, which uses this liquid crystal composition, is useful for active matrix driven liquid crystal display elements, and can be used for liquid crystal display elements in vertical-alignment and polymer sustained vertical-alignment displays, and the like.

The present invention provides: a liquid crystal composition which contains at least one compound represented by general formula (i) and has negative dielectric anisotropy; and a liquid crystal display element manufactured using the liquid crystal composition. The problem to be solved by the present invention is to provide: a liquid crystal composition having high refractive index anisotropy (delta n), a small rotational viscosity (gamma 1) and a large elastic constant (K33) and also having a high voltage holding ratio (VHR) and negative dielectric anisotropy (delta epsilon); and a liquid crystal display element which is manufactured using the liquid crystal composition, is reduced in display defects including dropping marks, image sticking and display unevenness or does not have such display defects, and therefore has excellent display quality and also has a rapid response speed.