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:
Jun. 13, 2017
Filed:
May. 15, 2014
Koninklijke Philips N.v., Eindhoven, NL;
Kumar Arulandu, Breda, NL;
Willem Franke Pasveer, Dordrecht, NL;
Antonius Petrus Marinus Dingemans, Tilburg, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
A first lighting device comprises an electromagnetic sensor operable to receive an electromagnetic signal from at least one other lighting device, an acoustic sensor operable to receive an acoustic signal from the other lighting device, and a signal processing module. The signal processing module is configured to determine a distance between the first lighting device and the other lighting device by comparing the acoustic and electromagnetic signals received from the other lighting device. For example, the signals may be emitted when the other device detects occupancy in a space, and the first device may control its light output in dependence on receipt of the signals and the distance from the device that detected the occupancy.