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:
Oct. 12, 2004
Filed:
Nov. 27, 2001
Applicant:
Inventors:
Toshio Sakai, Chiba, JP;
Kenichi Fukuoka, Chiba, JP;
Hiroshi Tokairin, Chiba, JP;
Chishio Hosokawa, Chiba, JP;
Assignee:
Idemitsu Kosan Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/314 ;
U.S. Cl.
CPC ...
H05B 3/314 ;
Abstract
An organic electroluminescence device which comprises a pair of electrodes comprising an anode and a cathode and a layer of organic compounds comprising at least an organic light emitting layer and disposed between the pair of electrodes, wherein the layer of organic compounds comprises a light emitting material and a bis-condensed aromatic cyclic compound. The organic electroluminescence device exhibits suppressed crystallization in driving for a long time or in environments at high temperatures, has improved durability and is advantageously used in practical applications.