Patents by Inventor Patrick Zijlstra

Patrick Zijlstra 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 driver providing synchronization during commutation
    Publication number: 20070182344
    Abstract: A lamp driver having two independently operating half-bridges integrated as a down-converter (1) and one as an alternator (2). Ensures that current control and inversion can be performed in a single stage, thereby providing synchronization at commutation moment. May comprise detection means (15, 18) for detecting a defined state of the down-converter (1), in which case commutation is only carried out if it has been requested and the defined state has been detected. A delay circuit (16) may ensure that commutation is always carried out if requested, even if the defined state is not detected.
    Type: Application
    Filed: July 8, 2005
    Publication date: August 9, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Lambertus De Brouwer, Patrick Zijlstra