Patents by Inventor John Stephane Hirsch

John Stephane Hirsch 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).

  • HID lighting system
    Patent number: 8766549
    Abstract: A low-cost HID lighting system (100) comprises: —an HID lamp (1) having an aspect ratio less than 6; and —a resonant electronic driver (10) for driving the HID lamp, the driver being designed for providing alternating current to the lamp and including a control device (30) for determining the current frequency. The lamp has a frequency spectrum containing at least one arc-shaping acoustic resonance frequency as well as unwanted acoustic resonance frequencies. During normal operation, the lamp is provided with frequency-modulated lamp current so that the lamp current has a relatively broad power spectrum within a range between kHz and 200 kHz, so that said arc-shaping acoustic resonance is triggered while said unwanted acoustic resonances are avoided, irrespective of lamp orientation.
    Type: Grant
    Filed: January 30, 2011
    Date of Patent: July 1, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: John Stephane Hirsch, Rene Van Honschooten, Patrick Alouisius Martina De Bruycker
  • HID LIGHTING SYSTEM
    Publication number: 20120306395
    Abstract: A low-cost HID lighting system (100) comprises: —an HID lamp (1) having an aspect ratio less than 6; and —a resonant electronic driver (10) for driving the HID lamp, the driver being designed for providing alternating current to the lamp and including a control device (30) for determining the current frequency. The lamp has a frequency spectrum containing at least one arc-shaping acoustic resonance frequency as well as unwanted acoustic resonance frequencies. During normal operation, the lamp is provided with frequency-modulated lamp current so that the lamp current has a relatively broad power spectrum within a range between kHz and 200 kHz, so that said arc-shaping acoustic resonance is triggered while said unwanted acoustic resonances are avoided, irrespective of lamp orientation.
    Type: Application
    Filed: January 30, 2011
    Publication date: December 6, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: John Stephane Hirsch, Rene Van Honschooten, Patrick Alouisius Martina De Bruycker