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. 19, 2011
Filed:
Jun. 21, 2007
Josephus Adrianus Maria Van Erp, Eindhoven, NL;
Josephus Adrianus Maria Van Erp, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An illumination system () comprises a plurality of light source assemblies () and a common controller (). Each light source assembly () comprises a plurality of individually controllable light sources () for generating light of mutually different colors. The controller is designed to generate a plurality of switched frequency signals (S, S, S) for the respective light sources, with a frequency within a relatively small frequency band, the different frequency signals (S, S, S) having mutually different frequencies (f, f, f). In each light source assembly, each light source is responsive to a respective one of said switched frequency signals (S, S, S), the light source being ON for as long as the respective switched frequency signal is zero and being OFF for as long as the respective switched frequency signal has the respective frequency.