Patent ID: 7704569
Filing Date: 2010-04-27
Classification: C09K,G02B,G02F,Y10T

Abstract:
1. A method for producing a twist-obliquely oriented film, comprising: providing a substrate made of a transparent polymer; applying metal alkoxide on the substrate; heating the substrate to form a transparent glassy macromolecule thereby forming an alignment layer, on the substrate, containing the glassy macromolecule; performing a rubbing treatment on the alignment layer; and applying a liquid crystal coating solution containing a chiral agent and a photopolymerizable liquid crystal composition on the substrate so as to form a twist-obliquely oriented liquid crystal layer to form the twist-obliquely oriented film, wherein the twist-obliquely oriented film has: an angle of orientation that is not smaller than 1° and is smaller than 180°; and a degree of obliquity that is 30 or more, provided that the degree of obliquity is calculated as wherein Δnd(0) is a retardation in a frontal direction, and Δnd(+30) and Δnd(−30) are each a corresponding retardation in a direction inclined at ±30° toward a slow axis, respectively.