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:
Feb. 24, 2009
Filed:
May. 21, 2007
Gerard Harbers, Sunnyvale, CA (US);
Laurie Scheffel, Tucson, AZ (US);
Matthijs H. Keuper, San Jose, CA (US);
Robert H. Holman, Evanston, IL (US);
Gerard Harbers, Sunnyvale, CA (US);
Laurie Scheffel, Tucson, AZ (US);
Matthijs H. Keuper, San Jose, CA (US);
Robert H. Holman, Evanston, IL (US);
Philips Lumileds Lighting Company, LLC, San Jose, CA (US);
Abstract
For mixing different light colors from different LEDs or energized phosphors, an elongated mixing tunnel is used having a reflective inner surface. LEDs of different colors are optically coupled along the length of the mixing tunnel and at a first end of the tunnel. Light coupled along the length of the tunnel is reflected by an angled dichroic mirror that selectively reflects the incoming color light towards a single output port of the mixing tunnel. The dichroic mirror passes all other colors of light being transmitted towards the output port of the tunnel. Two, three, or more colors of LEDs can be used. Efficient and compact ways to energize phosphors are also described. Other optical techniques are also described.