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:
Aug. 03, 2010
Filed:
Oct. 14, 2005
Frédéric S. Diana, Santa Barbara, CA (US);
Aurélien J. F. David, Paris, FR;
Pierre M. Petroff, Santa Barbara, CA (US);
Claude C. A. Weisbuch, Paris, FR;
Frédéric S. Diana, Santa Barbara, CA (US);
Aurélien J. F. David, Paris, FR;
Pierre M. Petroff, Santa Barbara, CA (US);
Claude C. A. Weisbuch, Paris, FR;
The Regents of the University of California, Oakland, CA (US);
Abstract
A high efficiency light emitting diode (LED) comprised of a substrate, a buffer layer grown on the substrate (if such a layer is needed), a first active region comprising primary emitting species (PES) that are electrically-injected, a second active region comprising secondary emitting species (SES) that are optically-pumped by the light emitted from the PES, and photonic crystals, wherein the photonic crystals act as diffraction gratings to provide high light extraction efficiency, to provide efficient excitation of the SES, and/or to modulate the far-field emission pattern.