Multi-layer phase retarder, elliptical polarizer and liquid crystal display device

Abstract

A multi-layer phase retarder is a laminated member of a phase retarder satisfying 1.05≦α<1.3 and β<1, and a phase retarder satisfying 1<α<1.05 and β>1 with following proviso. The retardation in the normal direction by a light beam of a 400 nm wavelength is R1, the retardation in the normal direction by a light beam of a 550 nm is R2, the retardation in the perpendicular direction in the state tilted by 40 degrees with respect to the normal direction with the slow axis as the rotation axis is R3, and R1/R2 is α and R3/R2 is β. An elliptical polarizer is alaminated member of the multi-layer phase retarder, and a polarizer. A liquid crystal display device includes the multi-layer phase retarder, or the same and a polarizer at least on one side of a liquid crystal cell.

Dependencies are inferred from the claim text.