The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Sep. 18, 2009
Taku Hatano, Tokyo, JP;
Taku Hatano, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
An optical film includes: a layer A formed of a resin composition Pcontaining a resin xhaving a positive intrinsic birefringence value and a resin yhaving a negative intrinsic birefringence value; and a layer B formed of a resin composition Pcontaining a resin xhaving a positive intrinsic birefringence value and a resin yhaving a negative intrinsic birefringence value. In the optical film, retardations R, R, and Rat an incident angle of 0° satisfy the relationship of R<R<R, and retardation Re at an incident angle of 0° and retardation Rat an incident angle of 40°. satisfy the relationship of 0.92≦R/Re≦1.08. Also provided is a liquid crystal display device including the optical film.