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:
Sep. 20, 2016
Filed:
Jan. 10, 2014
Koninklijke Philips N.v., Eindhoven, NL;
Willem Peter van der Brug, Best, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
A lighting system and a corresponding method are provided. The method comprises: sending a change operational state command to a lighting device group () comprising several lighting devices (); at each lighting device, applying a randomized delay within a predetermined delay interval or an individual predetermined delay within the delay interval; changing the operational state in accordance with the change operational state command at each lighting device at the end of each respective delay; detecting changes in the total drive power fed to the group of lighting devices within the delay interval and counting the total number of changes; comparing the total number of changes with a nominal number corresponding with the number of lighting devices within the group of lighting devices; generating a lighting device error signal if the number of changes is smaller than a predetermined fraction of the nominal number, including the nominal number.