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:
Apr. 10, 2012
Filed:
Oct. 29, 2007
Masato Bitou, Ibaraki, JP;
Shunsuke Shutou, Ibaraki, JP;
Nobuyuki Kozonoi, Ibaraki, JP;
Ikuo Kawamoto, Ibaraki, JP;
Hironori Motomura, Ibaraki, JP;
Misaki Sabae, Ibaraki, JP;
Masato Bitou, Ibaraki, JP;
Shunsuke Shutou, Ibaraki, JP;
Nobuyuki Kozonoi, Ibaraki, JP;
Ikuo Kawamoto, Ibaraki, JP;
Hironori Motomura, Ibaraki, JP;
Misaki Sabae, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
Provided are a laminated optical film capable of enhancing a contrast ratio in an oblique direction remarkably while enhancing viewing angle characteristics when being used in a liquid crystal display apparatus or the like, and a liquid crystal panel and a liquid crystal display apparatus using the laminated optical film. The laminated optical film of the present invention includes a polarizer, a first optical compensation layer, and a second optical compensation layer in the stated order, in which the first optical compensation layer has a refractive index profile of nx>nz>ny and is placed so that a slow axis direction thereof is substantially parallel to or substantially perpendicular to an absorption axis direction of the polarizer, and the second optical compensation layer converts linearly polarized light into circularly polarized light or circularly polarized light into linearly polarized light in a visible light region.