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:
Sep. 27, 2011
Filed:
Feb. 14, 2005
Shingo Ishihara, Yonezawa, JP;
Sukekazu Aratani, Hitachiota, JP;
Masaya Adachi, Hitachi, JP;
Takayuki Ouchi, Hitachi, JP;
Shingo Ishihara, Yonezawa, JP;
Sukekazu Aratani, Hitachiota, JP;
Masaya Adachi, Hitachi, JP;
Takayuki Ouchi, Hitachi, JP;
Hitachi Displays, Ltd., Chiba, JP;
Abstract
It is an object to provide an organic light-emitting element having two or more light-emitting layers, wherein degradation of each constituent material for the light-emitting layer is reduced to improve reliability of the element. The present invention provides an organic light-emitting element having a laminated structure with a first mixed light-emitting layercomposed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and a second mixed light-emitting layercomposed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and also provides an image display device which uses the organic light-emitting element.