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:
Apr. 21, 2009
Filed:
Apr. 21, 2004
Jun-yeob Lee, Seongnam-si, KR;
Yong-joong Choi, Yongin-si, KR;
Jang-hyuk Kwon, Suwon-si, KR;
Ho-kyoon Chung, Yongi-si, KR;
Jun-Yeob Lee, Seongnam-si, KR;
Yong-Joong Choi, Yongin-si, KR;
Jang-Hyuk Kwon, Suwon-si, KR;
Ho-Kyoon Chung, Yongi-si, KR;
Samsung Mobile Display Co., Ltd., Suwon-si, KR;
Abstract
An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML', wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L′ are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L′ has 15 or more carbon atoms in the ligand.