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:
Dec. 27, 2011
Filed:
Apr. 04, 2007
Geert Willem Van Der Veen, Eindhoven, NL;
Wijnand Johannes Rietman, Eindhoven, NL;
Geert Willem Van Der Veen, Eindhoven, NL;
Wijnand Johannes Rietman, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method for dimming an illumination system () capable of emitting light (L) with a variable color is described. The illumination system () comprises three dimmable light sources () generating respective lights (L, L, L) having respective, mutually different colors (C, C, C). The method comprises the step of reducing the light intensities (I, I, I) of the three dimmable light sources () while maintaining the color point until one of said light sources () reaches a lower dim limit (I)—The method further comprises the step of maintaining the light intensity (I) of said one light source () at its lower dim limit (I) and reducing the light intensities (I, I) of the two other dimmable light sources () in such a manner that the hue is maintained.