Inventors:
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
Assignee:
Xicato, Inc. - San Jose CA
International Classification:
F21V 29/00, F21V 7/00, F21V 7/10, F21V 7/22
US Classification:
362234, 362253, 36229601, 3622961, 36229604, 362294
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.