Patent ID: 7981489
Filing Date: 2011-07-19
Classification: B29C,B29D,B29K,C09K,G02B,G02F

Abstract:
1. An optical compensation sheet, comprising a cellulose acylate film that contains 1 to 20 parts by mass of a retardation controlling agent, to 100 parts by mass of a cellulose acylate, wherein the retardation controlling agent comprises at least two compounds different in Re/Rth ratios from each other; wherein one of the at least two compounds contained in the retardation controlling agent is selected from the group consisting of formulas (I), (II) and (IV) and exhibits a Re/Rth ratio of less than 0.35, and the other is selected from the group consisting of formulas (III) and (IV) and exhibits a Re/Rth ratio of not less than 0.35; wherein in Formula (I), X wherein in Formula (II), Ar wherein in Formula (III), Ar wherein in Formula (IV), R