DAP type liquid crystal device with cholesteric liquid crystal birefringent layer

摘要

Disclosed herein is a DAP type-ECB system liquid crystal display device comprising (1) a liquid crystal cell in which a liquid crystal layer is sandwiched between a pair of substrates each having at least one electrode, (2) a birefringent layer sandwiched between a substrate and the liquid crystal cell and (3) a pair of polarizers disposed on outer surfaces of the substrates. The birefringent layer comprises a liquid crystal compound showing a cholesteric liquid crystal phase or a polymer film obtained by quenching a polymer showing a cholesteric phase to fix the aligning direction of the polymer molecules, and refractive indexes nx, ny within a plane of the birefringent layer and the refractive index nz in the direction perpendicular to the plane have a relationship: nx=ny>nz.