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:
Apr. 19, 2011
Filed:
Jul. 21, 2006
Applicants:
Kazuki Kitamura, Ishikawa-gun, JP;
Tetsuo Ishida, Kanazawa, JP;
Mitsugu Tamekawa, Hakusan, JP;
Inventors:
Assignee:
Toshiba Matsushita Display Technology Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/62 (2006.01); H01L 33/00 (2010.01);
U.S. Cl.
CPC ...
Abstract
An organic EL element includes a pair of electrodes and an emitting layer interposed therebetween. The emitting layer is made of a mixture containing a host material and a dopant material. In the emitting layer, a concentration profile of the dopant material along a thickness direction includes at least two relative maximums or at least two relative minimums.