Patent ID: 6795149
Filing Date: 2004-09-21
Classification: G02F

Abstract:
A liquid crystal display device, comprising:a polariser, at least two retardation films, a nematic liquid crystal layer, and a cross-linked, light reflecting RGB patterned cholesteric colour filter, wherein said liquid crystal layer is a super twisted nematic liquid crystal layer having a twist angle between 180 and 270 degrees, each of the retardation films in said at least two retardation films has a different optical axis with respect to a vertical y-axis, and the summed retardation R of the at least two retardation films and the liquid crystal layer is equal to approximately R=(3+2n)&lgr;/4, where n=0, 1, 2, 3, and wherein said device comprises a further retardation film being a twisted nematic polymeric layer.