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:
May. 05, 2015
Filed:
Jan. 07, 2010
Tim C. W. Schenk, Eindhoven, NL;
Sel B. Colak, Eindhoven, DE;
Johannes P. Wernars, Megen, NL;
Johan P. M. G. Linnartz, Eindhoven, NL;
Lorenzo Feri, Eindhoven, NL;
Paulus H. A. Damink, Son en Breugel, NL;
Hendricus T. G. M. Penning DE Vries, Mierlo, NL;
Tim C. W. Schenk, Eindhoven, NL;
Sel B. Colak, Eindhoven, DE;
Johannes P. Wernars, Megen, NL;
Johan P. M. G. Linnartz, Eindhoven, NL;
Lorenzo Feri, Eindhoven, NL;
Paulus H. A. Damink, Son en Breugel, NL;
Hendricus T. G. M. Penning de Vries, Mierlo, NL;
Koninklijkle Philips N.V., Eindhoven, NL;
Abstract
A method for driving a lamp () comprises the steps of: generating a lamp current (I) having a constant magnitude; defining a commutation period having a duration T; defining a time base of original commutation moments, having fixed mutual intervals of 0.5*T; receiving data to be embedded in the light output; commutating the lamp current at commutation moments; wherein individual commutations are time-modulated in order to encode said received data. Preferably, a commutation moment is: either equal to an original commutation moment if there are no data to embed; or advanced over a modulation distance (Δ) with respect to the corresponding original commutation moment in order to encode data having a first value ('0'); or delayed over said modulation distance (Δ) with respect to the corresponding original commutation moment in order to encode data having a second value ('1').