Patent ID: 7473446
Filing Date: 2009-01-06
Classification: C09K,G02B

Abstract:
1. A retarder comprising: a substrate, and on or above the substrate a first optically anisotropic layer formed of a composition comprising a rod-like liquid-crystal compound, in which the rod-like molecules are aligned homogeneously, and substantially generating a phase difference of π at 550 nm, and a second optically anisotropic layer formed of a composition comprising a rod-like liquid-crystal compound, in which the rod-like molecules are aligned homogeneously, and substantially generating a phase difference of π/2 at 550 nm; wherein at least one of the rod-like liquid-crystal compounds is denoted by Formula (I) below; where, Q an in-plane slow axis of the second optically anisotropic layer and an in-plane slow axis of the first optically anisotropic layer cross substantially at 60 degrees.