Patent ID: 8753726
Filing Date: 2014-06-17
Classification: C09K,G02B,G02F

Abstract:
1. An optical compensation film, containing: cellulose ester; (meth)acrylic polymer in an amount of 3.0 to 11.5 parts by weight to 100 parts by weight cellulose ester; and an esterified compound in which all or a part of OH groups in a compound (A) are esterified, wherein the compound (A) has one of a furanose structure and a pyranose structure; or an esterified compound in which all or a part of OH groups in a compound (B) are esterified, wherein in the compound (B), two or more and twelve or less of at least one kind of a furanose structure and a pyranose structure are bonded, wherein the optical compensation film is stretched so as to satisfy the following formulas (A-1) to (A-3), in these formulas, nx represents a refractive index in a slow axis direction in a plane of the optical compensation film, ny represents a refractive index in a direction perpendicular to the slow axis in a plane, nz represents a refractive index in a thickness direction and d represents the thickness (nm) of the optical compensation film, and the measuring wavelength for the refractive index is 590 nm, and Ro (480) and Ro (630) represent Ro measured with the wavelength of 480 nm and Ro measured with the wavelength of 630 nm, respectively, and wherein the stretched optical compensation film has a haze of 0.41 or less.