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. 23, 2007
Filed:
Aug. 27, 2003
Applicants:
Jong Geun Yoon, Seoul, KR;
Myung Seop Kim, Kyungki-do, KR;
Hyoung Yun OH, Seoul, KR;
Sung Tae Kim, Seoul, KR;
Inventors:
Jong Geun Yoon, Seoul, KR;
Myung Seop Kim, Kyungki-do, KR;
Hyoung Yun Oh, Seoul, KR;
Sung Tae Kim, Seoul, KR;
Assignee:
LG Electronics Inc., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/54 (2006.01); H01L 51/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
An organic electroluminescent device with improved long-term stability is disclosed, comprising either a dual layer of a layer I and a layer II or a mixture of the two layers between an EL multilayer and a second electrode, the layer II being made of at least one alkali metal, alkaline earth metal, or compound thereof, the layer I being formed of at least one material selected from those having chemical formula I and chemical formula II as shown below.