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:
Oct. 29, 2013
Filed:
Oct. 02, 2009
Applicant:
Timothy Moss, Chicago, IL (US);
Inventor:
Timothy Moss, Chicago, IL (US);
Assignee:
Koninklijke Philips N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and apparatus for adjusting the color or color temperature of combined light emitted by one or more LEDs () driven by a single switching regulator circuit (). Properties of the light output are changed by intentionally varying a source voltage () provided as an input to the regulator circuit (). The connection of different colored LEDs in various branches () of the switching regulator circuit () facilitates adjustment of the respective drive currents provided to the LEDs, and hence the color or color temperature of the resulting combined light, merely by adjusting the level of the source voltage of the regulator circuit.