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:
Feb. 12, 2013
Filed:
Dec. 13, 2007
Kohei Yano, Ibaraki, JP;
Akiko Ogasawara, Ibaraki, JP;
Tsuyoshi Chiba, Ibaraki, JP;
Yuusuke Toyama, Ibaraki, JP;
Shinichi Inoue, Ibaraki, JP;
Masayuki Satake, Ibaraki, JP;
Kohei Yano, Ibaraki, JP;
Akiko Ogasawara, Ibaraki, JP;
Tsuyoshi Chiba, Ibaraki, JP;
Yuusuke Toyama, Ibaraki, JP;
Shinichi Inoue, Ibaraki, JP;
Masayuki Satake, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
A pressure-sensitive adhesive optical film of the present invention comprises: an optical film comprising a transparent base film and a discotic liquid crystal layer on one side of the transparent base film; and a pressure-sensitive adhesive layer that is provided on the discotic liquid crystal layer, wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive containing an acrylic polymer comprising an alkyl(meth)acrylate (a1) and a ring structure-containing (meth)acrylate (a2) as monomer units and having a weight average molecular weight of 1,000,000 to 3,000,000, and a crosslinking agent. The pressure-sensitive adhesive optical film has durability and can be prevented from causing display unevenness in a peripheral portion of a display screen.