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:
May. 22, 2012
Filed:
Oct. 15, 2007
Applicants:
Takeshi Ikeda, Otsu, JP;
Tsuyoshi Tominaga, Otsu, JP;
Kazunori Sugimoto, Otsu, JP;
Kazumasa Nagao, Otsu, JP;
Inventors:
Takeshi Ikeda, Otsu, JP;
Tsuyoshi Tominaga, Otsu, JP;
Kazunori Sugimoto, Otsu, JP;
Kazumasa Nagao, Otsu, JP;
Assignee:
TORAY Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 35/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a light emitting device comprising at least an emissive layer existing between an anode and a cathode, which emits light by means of electric energy. The light emitting device contains a compound having a pyrromethene skeletal structure with a specific structure or a metal complex thereof and a naphthacene derivative, and thus the light emitting device has high luminance efficiency and excellent durability.