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:
Aug. 27, 2013
Filed:
Dec. 21, 2006
Yoriko Nakayama, Tokyo, JP;
Hiroshi Kashiwagi, Tokyo, JP;
Hiroyuki Hashimoto, Saitama, JP;
Kunimasa Hiyama, Tokyo, JP;
Yoriko Nakayama, Tokyo, JP;
Hiroshi Kashiwagi, Tokyo, JP;
Hiroyuki Hashimoto, Saitama, JP;
Kunimasa Hiyama, Tokyo, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
Abstract
Provided is an organic electroluminescence element which is driven with a reduced drive voltage without deteriorating emission luminance and has a high power efficiency. The organic electroluminescence element having at least one light emitting layer is characterized in that two or more types of light emitting dopants having different emission colors are included in at least one light emitting layer, the concentration of all the light emitting dopants included in the light emitting layer is 5 Vol % or more, and the concentration of the light emitting dopant giving a main emission color among the light emitting dopants in the light emitting layer is 2 Vol % or less.