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. 02, 2015
Filed:
Jun. 02, 2014
Applicant:
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Inventors:
Hiroko Yamazaki, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Assignee:
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/00 (2006.01); H01L 33/50 (2010.01); H01L 51/50 (2006.01); H01L 51/56 (2006.01);
U.S. Cl.
CPC ...
H01L 33/502 (2013.01); H01L 51/5016 (2013.01); H01L 51/5036 (2013.01); H01L 51/5096 (2013.01); H01L 51/5028 (2013.01); H01L 51/56 (2013.01);
Abstract
The present invention provides a white organic light-emitting element high in the emission efficiency. In particular, the invention provides a white organic light-emitting element that has an emission spectrum having peaks in the respective wavelength regions of red color, green color and blue color and is high in the emission efficiency. It is preferable to use an electron transport material between a first emission region and a second emission region and more preferable to use a hole block material.