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:
Jun. 23, 2015
Filed:
Nov. 13, 2012
Konica Minolta, Inc., Tokyo, JP;
Yukihito Nakazawa, Kobe, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
The objective of the present invention is to provide: a circularly polarizing plate which comprises a λ/4 retardation film and has excellent visibility, excellent durability (resistance to image unevenness) and excellent resistance to panel deterioration (flatness) after storage in a high-temperature high-humidity environment for a long period of time; and an organic electroluminescent display device which uses the circularly polarizing plate. This organic electroluminescent display device comprises, from the viewing side, a protective film, a polarizer, a λ/4 retardation film and an organic electroluminescent element in this order, and is characterized in that at least one surface of the λ/4 retardation film has a layer A which has a storage modulus of from 100 MPa to 500 MPa (inclusive).