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:
Jul. 21, 2015
Filed:
Oct. 10, 2008
Gerard Harbers, Sunnyvale, CA (US);
Mark A. Pugh, Los Gatos, CA (US);
Menne T. DE Roos, Saratoga, CA (US);
John S. Yriberri, San Jose, CA (US);
Peter K. Tseng, San Jose, CA (US);
Gerard Harbers, Sunnyvale, CA (US);
Mark A. Pugh, Los Gatos, CA (US);
Menne T. de Roos, Saratoga, CA (US);
John S. Yriberri, San Jose, CA (US);
Peter K. Tseng, San Jose, CA (US);
Xicato, Inc., San Jose, CA (US);
Abstract
A light emitting device is produced using a plurality of light emitting diodes within a light mixing cavity formed by surrounding sidewalls. The sidewalls may be integrally formed as part of a surrounding heat sink or alternatively may be an insert into a cavity within a heat sink. The reflective sidewalls may be coated with a diffusing material and/or covered with one or more phosphors. Multiple phosphors are located at different locations of the cavity, e.g., on the sidewalls, a window covering the output port, or on a reflector attached to the bottom of the cavity. The light emitting diodes may be positioned rotationally symmetrically around the optical axis on a board.