Patents by Inventor Kurt W. Wicklund

Kurt W. Wicklund 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).

  • Lamp-voltage threshold detector
    Patent number: 6559608
    Abstract: A threshold detector for detecting lamp voltage includes an opto-coupler. The opto-coupler includes a radiation-emitting semiconductor element coupled to a source of a sensed voltage and an optically-coupled radiation-receiving semiconductor element with an impedance which varies with received radiation. A switching element coupled to the radiation-receiving semiconductor element produces a first or second signal, depending on the sensed voltage.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: May 6, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Kurt W. Wicklund, Patrick E. Troy
  • Multiple-parameter control of lamp ignition
    Publication number: 20020079848
    Abstract: Starting of a gaseous discharge lamp is controlled in response to both lamp voltage and duration of time during which igniting pulses are applied. An upper and a lower threshold voltage are utilized to determine whether the lamp is in an unstable starting mode, a cold starting mode, or a steady-state operating mode.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 27, 2002
    Applicant: Philips Electronics North America Corporation
    Inventors: Kurt W. Wicklund, Patrick E. Troy
  • Multiple-parameter control of lamp ignition
    Patent number: 6359396
    Abstract: Starting of a gaseous discharge lamp is control led in response to both lamp voltage and duration of time during which igniting pulses are applied. An upper and a lower threshold voltage are utilized to determine whether the lamp is in an unstable starting mode, a cold starting mode, or a steady-state operating mode.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: March 19, 2002
    Assignee: Philips Electronics North America Corporation
    Inventors: Kurt W. Wicklund, Patrick E. Troy