Patent ID: 7315341
Filing Date: 2008-01-01
Classification: G02F

Abstract:
1. A liquid crystal display device comprising a pair of polarizing plates, a liquid crystal cell, a first optically anisotropic layer and a second optically anisotropic layer, wherein the liquid crystal cell, the first optically anisotropic layer and the second optically anisotropic layer are disposed between the polarizing plates, the polarizing plate comprises a polarizing film or the polarizing plate comprises a polarizing film and a protective film on a plane of the polarizing film nearer to the liquid crystal cell, the pair of polarizing plates are at right angles to each other at the absorption axes of the respective polarizing films, the liquid crystal cell comprises a pair of substrates and a liquid crystal layer containing liquid crystal molecules interposed between the substrates, the liquid crystal molecules are oriented approximately perpendicular to the substrate of the liquid crystal cell, the first optically anisotropic layer is 40 to 200 nm in retardation value (Re) in an in-plane direction with respect to visible light, the second optically anisotropic layer is of an optically negative refractive anisotropy, 10 nm or lower in Re with respect to visible light and 30 to 250 nm in retardation value (Rth) in the thickness direction, at least one of the first optically anisotropic layer and the second optically anisotropic layer is formed on an optical film satisfying that Rth is 0 to 150 nm at 23° C./60% RH and the difference between Rth at 23° C./10% RH and Rth at 23° C./80% RH is 40% or less of Rth at 23° C./60% RH, and the optical film may be the substrate of the liquid crystal cell, the protective film on a plane of the polarizing film nearer to the liquid crystal cell, or the polarizing film.