Patent ID: 7462381
Filing Date: 2008-12-09
Classification: C09K,G02B,G02F

Abstract:
1. A method of manufacturing a birefringent film in which a liquid crystal compound birefringent layer is formed on a non-liquid crystal polymer birefringent layer, the liquid crystal compound birefringent layer being formed from an aligned liquid crystal compound, the non-liquid crystal polymer birefringent layer being formed from a non-liquid crystal polymer, comprising providing the non-liquid crystal polymer birefringent layer, wherein the non-liquid crystal polymer birefringent layer has been subjected to an aligning treatment so that it has an aligning property, the aligning treatment being one or both of stretching and shrinking, and forming the liquid crystal compound birefringent layer on the non-liquid crystal polymer birefringent layer such that, due to alignment of the non-liquid crystal polymer birefringent layer, the liquid crystal compound birefringent layer is treated to be aligned while being formed, wherein the non-liquid crystal polymer birefringent layer exhibits characteristics expressed by nx>ny>nz, where nx, ny and nz denote refractive indices in directions of an X axis, Y axis and Z axis in the non-liquid crystal polymer birefringent layer, respectively, the X axis denotes an axial direction presenting a maximum refractive index within a plane of the non-liquid crystal polymer birefringent layer, the Y axis denotes an axial direction perpendicular to the X axis within the plane, and the Z axis denotes a thickness direction perpendicular to the X axis and the Y axis, and wherein the liquid crystal compound birefringent layer is formed by coating a liquid crystal compound solution on the non-liquid crystal polymer birefringent layer that has been subjected to the aligning treatment.