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:
Jan. 04, 1994
Filed:
Feb. 26, 1992
Applicant:
Inventors:
Takeo Wakimoto, Tsurugashima, JP;
Ryuji Murayama, Tsurugashima, JP;
Hitoshi Nakada, Tsurugashima, JP;
Masaharu Nomura, Tokyo, JP;
Giichi Sato, Tokyo, JP;
Assignees:
Pioneer Electronic Corporation, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
313504 ; 313506 ; 3151693 ; 428917 ; 345 76 ;
Abstract
An organic electroluminescent device which includes a cathode, an organic emitting layer which includes a quinoline derivative and a quinacridone or quinazoline compound, an organic positive hole transport layer, and an anode, laminated in sequence, has a high emission efficiency and a high color purity of light emitted from the EL device.