Patents by Inventor Johannes P. Wernars

Johannes P. Wernars has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and device for driving a lamp
    Patent number: 9025966
    Abstract: 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”).
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: May 5, 2015
    Assignee: Koninklijkle Philips N.V.
    Inventors: Tim C. W. Schenk, Sel B. Colak, Johannes P. Wernars, Johan P. M. G. Linnartz, Lorenzo Feri, Paulus H. A. Damink, Hendricus T. G. M. Penning de Vries
  • METHOD AND DEVICE FOR DRIVING A LAMP
    Publication number: 20120105266
    Abstract: 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”).
    Type: Application
    Filed: January 7, 2010
    Publication date: May 3, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Tim C. W. Schenk, Sel B. Colak, Johannes P. Wernars, Johan P.M.G. Linnartz, Lorenzo Feri, Paulus H.A. Damink, Hendricus T.G.M. Penning de Vries