Patent ID: 6781664
Filing Date: 2004-08-24
Classification: G02F

Abstract:
A liquid-crystal switching element comprising:a liquid-crystal layer, between two parallel substrates, having an initial alignment which is essentially parallel to the substrates and is essentially untwisted, wherein the layer has an optical retardation [(dÂ·&Dgr;n)LC] of from 0.07 &mgr;m to 0.17 &mgr;m. at least one polarizer, a device for generating an electric field, which is aligned essentially parallel to the substrates in the case of a liquid-crystal layer of negative dielectric anisotropy and is aligned essentially perpendicular to the substrates in the case of a liquid-crystal layer of positive dielectric anisotropy, and, at least one birefringent layer, which is either a &lgr;/2 saver or two &lgr;/4 layers, wherein the optical retardation of the birefringent layer or of the birefringent layers [(dÂ·&Dgr;n)BL] is either essentially half or essentially twice the optical retardation of the liquid-crystal layer.