Patent ID: 7510748
Filing Date: 2009-03-31
Classification: C09K,G02B

Abstract:
1. A broadband brightness enhancement polarizer, comprising: (a) a cholesteric liquid crystal film laminate having a broadband selective reflecting wavelength range in which a plurality of cholesteric liquid crystal films having selective reflecting wavelength ranges different from each other by having different mixture ratios of a curable nematic liquid crystal compound expressed by the following chemical formula 1 and a curable chiral compound expressed by the following chemical formula 2 are laminated; and where, in the chemical formula 1, S is a spacer selected from the group consisting of (CH where, in the chemical formula 2, S is a spacer selected from the group consisting of (CH where C is a chiral group selected from the group consisting of: (b) a film having ¼λ phase difference laminated on one surface of the cholesteric liquid crystal film laminate.