Patent ID: 6937309
Filing Date: 2005-08-30
Classification: G02F

Abstract:
1. A liquid crystal display device, comprising: a liquid crystal display element formed so that a liquid crystal layer is disposed between a pair of substrates; a pair of polarizers disposed so as to flank said liquid crystal display element; an orientation film provided on each of the substrates for orienting the liquid crystal layer, each said orientation film being rubbed parallel to an absorption axis of the polarizer plate provided on the same side of the device as the substrate upon which that orientation film is provided; and at least one optical retardation compensator plate disposed between said liquid crystal display element and said polarizers, said at least one optical retardation compensator plate being represented by an inclining refractive ellipsoid, wherein the refractive index ellipsoid has three principal refractive indices, n wherein a value of applied voltage for displaying halftone obtained by applying to said liquid crystal display layer a voltage that is close to the threshold voltage of said liquid crystal layer is set within such a range that tone reversion does not occur at at least 50° from the normal to a surface of the liquid crystal display when halftone is being displayed thereby, and, wherein the value of the applied voltage is set so that a transmittance when white tone is being displayed is in a range not less than 90% and not more than 97% of the transmittance in a bright state where no voltage is being applied to the liquid crystal.