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:
Apr. 17, 2012
Filed:
Jul. 21, 2008
Peter Hubertus Franciscus Deurenberg, 'S-Hertogenbosch, NL;
Erik Nieuwlands, Eindhoven, NL;
Peter Hubertus Franciscus Deurenberg, 'S-Hertogenbosch, NL;
Erik Nieuwlands, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention relates to a control system () for controlling the light output of a light emitting unit (), which light emitting unit comprises at least one light emitting diode (LED) () and is adapted to emit light of at least one color, the control system comprising: a sensor unit () adapted to detect the light output of the light emitting unit and provide a corresponding feedback signal; and a control unit () adapted to control the light output of the light emitting unit based on a comparison between the feedback signal and a corresponding reference signal representing a desired light output, in order to provide an improved light output, wherein the control unit is further adapted to: determine a random switching period; determine on-time(s) for the LED(s) within the random switching period for providing the improved light output; and control energizing of the LED(s) according to the determined period and on-time(s). The present invention also relates to an LED light emitting unit arrangement, and a method for controlling the light output of an LED light emitting unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile