Patent ID: 7771802
Filing Date: 2010-08-10
Classification: C09K,G02B,G02F

Abstract:
1. A polarizing plate comprising: a polarizing plate stacked onto an optical compensation film having: a retardation value Re in a film plane of the optical compensation film; and a retardation value Rth in a thickness direction of the optical compensation film, the retardation value Re and Rth being reduced by an elongation, satisfying the formulae (1) and (2) without the elongation, and satisfying the formulae (3) to (6) after the elongation: wherein in the formula (3), Re is represented as positive value in an elongation direction and as negative value in a direction perpendicular to the elongation direction; in the formula (4), Rth is represented as negative value when a refractive index in the thickness direction is larger than a refractive index in the film plane direction; in the formulae (5) and (6), n represents an elongation ratio (%); and Re and Rth after the elongation at n % are represented as Re(n) and Rth(n), respectively, wherein n is 0.5 to 300; wherein the optical compensation film comprises a raw material polymer, wherein the raw material polymer comprises a polymer having a helix structure; wherein the polymer having the helix structure comprises at least one compound derived from a deoxyribonucleic acid; wherein the at least one compound derived from the deoxyribonucleic acid comprises a deoxyribonucleic acid-lipid complex obtained by electrostatically allowing a phosphate anion part of the deoxyribonucleic acid to interact with a cationic lipid.