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. 27, 2015
Filed:
Jul. 12, 2012
Dirk Hente, Wuerselen, DE;
Joseph Hendrik Anna Maria Jacobs, Eygelshoven, NL;
Céline Catherine Sarah Nicole, Eindhoven, NL;
Christian Kalkschmidt, Aachen, DE;
Dirk Hente, Wuerselen, DE;
Joseph Hendrik Anna Maria Jacobs, Eygelshoven, NL;
Céline Catherine Sarah Nicole, Eindhoven, NL;
Christian Kalkschmidt, Aachen, DE;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
The invention relates to a current determination apparatus for determining an operational driving current for driving a light source of a group of light sources. A same color shift function defining a light color shift depending on a driving current can be provided for all light sources of the group. An operational driving current is determined based on the color shift function such that the light color () of the light source of the group of light sources is shifted from a nominal color, which may be specific for each light source, to a light color () within a target color window (). Since for the different light sources the same color shift function can be used, a determination of individual operational driving currents such that the light sources of the group emit light having substantially the same color can be simplified.