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. 14, 2012
Filed:
Jun. 16, 2011
Aurelien J. F. David, Palo Alto, CA (US);
Henry Kwong-hin Choy, Sunnyvale, CA (US);
Jonathan J. Wierer, Jr., Pleasanton, CA (US);
Aurelien J. F. David, Palo Alto, CA (US);
Henry Kwong-Hin Choy, Sunnyvale, CA (US);
Jonathan J. Wierer, Jr., Pleasanton, CA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Philips Lumileds Lighting Company LLC, San Jose, CA (US);
Abstract
Structures are incorporated into a semiconductor light emitting device which may increase the extraction of light emitted at glancing incidence angles. In some embodiments, the device includes a low index material that directs light away from the metal contacts by total internal reflection. In some embodiments, the device includes extraction features such as cavities in the semiconductor structure which may extract glancing angle light directly, or direct the glancing angle light into smaller incidence angles which are more easily extracted from the device.