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. 26, 2016
Filed:
Jun. 24, 2013
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Toshiyuki Iida, Ibaraki, JP;
Takashi Shimizu, Ibaraki, JP;
Nao Murakami, Ibaraki, JP;
Kazuki Uwada, Ibaraki, JP;
Tadashi Kojima, Ibaraki, JP;
NITTO DENKO CORPORATION, Ibaraki-shi, JP;
Abstract
There is provided a circularly polarizing plate that can prevent light leakage in an organic EL panel and can suppress the warping of the panel to reduce reflection unevenness in a panel surface. A circularly polarizing plate according to an embodiment of the present invention is used in an organic EL panel, and includes a polarizer and a retardation film directly bonded to the polarizer. In-plane retardations of the retardation film satisfy a relationship of Re(450)<Re(550); and a 90° adhesive strength between the polarizer and the retardation film is 1.0 N/20 mm or more.