A method for driving a lamp (2) comprises the steps of: generating a lamp current (ICONST) having a constant magnitude; defining a commutation period having a duration TCOMM; defining a time base of original commutation moments, having fixed mutual intervals of 0.5 *TCOMM; 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 (?) with respect to the corresponding original commutation moment in order to encode data having a first value ("0"); or delayed over said modulation distance (?) with respect to the corresponding original commutation moment in order to encode data having a second value ("1").
申请公布号
CA2766738(A1)
申请公布日期
2011.01.06
申请号
CA20102766738
申请日期
2010.01.07
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
SCHENK, TIM C. W.;COLAK, SEL B.;WERNARS, JOHANNES P.;LINNARTZ, JOHAN P. M. G.;FERI, LORENZO;DAMINK, PAULUS H. A.;PENNING DE VRIES, HENDRICUS T. G. M.