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. 08, 2012
Filed:
Jun. 06, 2008
Vi-en Choong, Carlsbad, CA (US);
Stelios A. Choulis, Lemesos, CY;
Mathew K. Mathai, Monroeville, PA (US);
Vi-En Choong, Carlsbad, CA (US);
Stelios A. Choulis, Lemesos, CY;
Mathew K. Mathai, Monroeville, PA (US);
OSRAM Opto Semiconductors GmbH, Regensburg, DE;
Abstract
A radiation emitting device comprising a first electrode, which emits first charge carriers having a first charge during operation, a first charge carrier transporting layer, which comprises a fluorescent substance, a second charge carrier transporting layer, which contains a phosphorescent substance, and a second electrode, which emits second charge carriers having a second charge during operation, wherein during operation the second charge carrier transporting layer is largely free of first charge carriers.