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:
Jun. 07, 2005
Filed:
Nov. 12, 2002
Applicants:
Michael Wang, Duluth, GA (US);
Hari Venugopalan, Somerset, NJ (US);
Inventors:
Michael Wang, Duluth, GA (US);
Hari Venugopalan, Somerset, NJ (US);
Assignee:
GELcore LLC, Valley View, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L033/00 ;
U.S. Cl.
CPC ...
Abstract
A light emitting diode incorporating an active emitting layer () overlying a transparent substrate () is provided with a reflective diffraction grating () on the bottom surface of the substrate. Emitted light passing downwardly through the substrate is diffracted outwardly toward edges () of the substrate and passes out of the die through the edges. This effect enhances the external quantum efficiency of the diode.