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. 18, 2010
Filed:
May. 27, 2005
Mira S. Misra, Los Gatos, CA (US);
Yu-chen Shen, Sunnyvale, CA (US);
Stephen A. Stockman, Morgan Hill, CA (US);
Mira S. Misra, Los Gatos, CA (US);
Yu-Chen Shen, Sunnyvale, CA (US);
Stephen A. Stockman, Morgan Hill, CA (US);
Philips Lumileds Lighting Company, LLC, San Jose, CA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A light emitting device includes a region of first conductivity type, a region of second conductivity type, an active region, and an electrode. The active region is disposed between the region of first conductivity type and the region of second conductivity type and the region of second conductivity type is disposed between the active region and the electrode. The active region has a total thickness less than or equal to about 0.25λand has a portion located between about 0.6λand 0.75λfrom the electrode, where λis the wavelength of light emitted by the active region in the region of second conductivity type. In some embodiments, the active region includes a plurality of clusters, with a portion of a first cluster located between about 0.6λand 0.75λfrom the electrode and a portion of a second cluster located between about 1.2λand 1.35λfrom the electrode.