Patent ID: 7515231
Filing Date: 2009-04-07
Classification: C09K,G02B,G02F,Y10T

Abstract:
1. A liquid crystal display assembly comprising, a) a polarizer adjacent a lighting source, said polarizer having an oriented absorption axis, b) a viewer side analyzer having an absorption axis substantially perpendicular to the oriented absorption axis of the polarizer adjacent the lighting source, c) a liquid crystal cell comprising a twisted nematic liquid crystal material between the polarizer and the analyzer, and d) at least one compensator assembly located between the polarizer and the analyzer, the compensator comprising, wherein the compensator assembly includes a triacetyl cellulose substrate, a second surface of the polyvinyl alcohol film being in contact with said triacetyl cellulose substrate the triacetyl cellulose substrate having substantially no in-plane retardance and a negative out-of-plane retardance from about 30 nm to about 120 nm.