Patent ID: 6034755
Filing Date: 2000-03-07
Classification: G02F

Abstract:
A liquid crystal display comprising a liquid crystal cell of a bend alignment mode, two polarizing elements arranged on each side of the liquid crystal cell, and one or two optical compensatory sheets arranged between the liquid crystal cell and each of the polarizing elements, said liquid crystal cell comprising liquid crystal molecules provided between two electrode substrates, and said optical compensatory sheet comprising an optically anisotropic transparent substrate and an optically anisotropic layer containing a discotic compound, wherein the liquid crystal cell, the optical compensatory sheet and the transparent substrate have optical characteristics satisfying the following formulas:.vertline.(nx1-ny1).times.d1.vertline.-20.ltoreq..SIGMA..vertline.(nx2-ny2) .times.d2.vertline..ltoreq..vertline.(nx1-ny1).times.d1.vertline.+2050.ltoreq.{(n12+n22)/2-n32).times.d2.ltoreq.10000.ltoreq..vertline.(nx3-ny3).times.d3.vertline..ltoreq.200100.ltoreq.{(n13+n23)/2-n33).times.d3.ltoreq.1000in which nx1 and ny1 are main refractive indices in plane of the liquid crystal cell; d1 is the thickness in terms of nm of the liquid crystal cell; nx2 and ny2 are main refractive indices in plane of the optical compensatory sheet, d2 is the thickness in terms of nm of the optical compensatory sheet; .SIGMA..vertline.(nx2-ny2).times.d2.vertline. means the total value of .vertline.(nx2-ny2).times.d2.vertline. of the one or two optical compensatory sheets; n12, n22 and n32 are main refractive indices of the optical compensatory sheet satisfying the formula of n12.ltoreq.n22.ltoreq.n32; nx3 and ny3 are main refractive indices in plane of the transparent substrate; d3 is the thickness in terms of nm of the transparent substrate; and n13, n23 and n33 are main refractive indices of the transparent substrate satisfying the formula of n13.ltoreq.n23.ltoreq.n33.