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LED lamp color control system and method

United States Patent

8,368,315
February 5, 2013
View the Complete Patent at the US Patent & Trademark Office
An LED lamp color control system and method including an LED lamp having an LED controller 58; and a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 determines whether the LED source 80 is in a feedback controllable range, stores measured optical flux for the LED source 80 when the LED source 80 is in the feedback controllable range, and bypasses storing the measured optical flux when the LED source 80 is not in the feedback controllable range.
Gaines; James (Glen Ellyn, NY), Clauberg; Bernd (Schaumburg, IL), Van Erp; Josephus A. M. (Asten, NL)
Koninklijke Philips Electronics N.V. (Eindhoven, NL)
12/ 746,551
December 2, 2008
This invention was made with United States government support awarded by the U.S. Department of Energy Contract Number DE-FC26-05NT42342. The United States government has certain rights in this invention.