LIQUID-CRYSTAL DISPLAY ELEMENT

摘要

An object of the present invention is to provide a liquid-crystal display element using a liquid-crystal composition having negative dielectric anisotropy, capable of realising excellent display characteristics by being used in an FFS mode liquid-crystal display element, without deteriorating various characteristics as a liquid-crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, nematic phase stability at low temperatures, and γ1, and burn-in characteristics of a display element. A liquid-crystal display element containing at least one compound selected from the group consisting of compounds by the following General Formula (I) is provided:;;wherein each of R1 and R2 independently represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, A represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group, k represents 1 or 2, and in a case where k is 2, two A's may be the same as or different from each other.

主权项

1. A liquid-crystal display demerit, comprising:
a first substrate and a second substrate disposed to face each other; a liquid-crystal layer containing a liquid-crystal composition with which a gap between the first substrate and the second substrate is filled; an electrode layer including a common electrode including a transparent conductive material, a plurality of gate bus lines and data bus lines disposed in a matrix shape, a thin film transistor provided at the intersection at which the gate bus lines and the data bus lines intersect each other, and a pixel electrode including a transparent conductive material and forming a fringe electric field between the common electrode and the pixel electrode by being driven by the thin film transistor, for each pixel on the first substrate; and photo-alignment film layers inducing homogeneous alignment which are formed between the liquid-crystal layer and the first substrate and between the liquid-crystal layer and the second substrate, respectively, wherein a distance R between the pixel electrode and the common electrode is smaller than a distance G between the first substrate and the second substrate, and the liquid-crystal composition has a negative dielectric anisotropy, a nematic phase-isotropic liquid transition temperature of equal to or higher than 60° C., and an absolute value of dielectric anisotropy of equal to or greater than 2, and contains at least one compound selected from the group consisting of compounds represented by the following General Formula (I): wherein each of R1 and R2 independently represents an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, A represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group, k represents 1 or 2, and in a case where k is 2, two A's may be the same as or different from each other.