Patents by Inventor Bennie Izaak Pieter Simpelaar

Bennie Izaak Pieter Simpelaar 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 Ballast for Driving a High-Pressure Gas Discharge Lamp
    Publication number: 20080231206
    Abstract: Method of driving a high-pressure gas discharge lamp during its steady-state operation, wherein a steady-state current signal is sent through the lamp for maintaining a discharge arc in the lamp, comprising the step of comparing the lamp conductivity response to a current step in said current signal with reference parameters; and in response to said comparison at least one of the following steps: stopping the current supply to the lamp, generating a signal indicating the end-of-life status of the lamp, changing the steady-state current through the lamp, changing the steady-state waveform of the current signal through the lamp, and generating a signal indicating the lamp type, wherein said current step is obtained by sending a current pulse which is superimposed on said steady-state current signal through the lamp.
    Type: Application
    Filed: January 18, 2005
    Publication date: September 25, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONIC, N.V.
    Inventors: Winston Donald Couwenberg, Robertus Antonius Johannes Keijser, Jacobus Marinus Maria Claassens, Bennie Izaak Pieter Simpelaar
  • Switching device with improved over-current protection
    Patent number: 6420833
    Abstract: In an electronic ballast comprising a fusistor for switching off the ballast if the mains supply current becomes too high, an NTC is arranged between the mains supply lines. A very reliable functioning of the fusistor is obtained thereby.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: July 16, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Bennie Izaak Pieter Simpelaar
  • Switching device
    Publication number: 20010020829
    Abstract: In an electronic ballast comprising a fusistor for switching off the ballast if the mains supply current becomes too high, an NTC is arranged between the mains supply lines. A very reliable functioning of the fusistor is obtained thereby.
    Type: Application
    Filed: February 7, 2001
    Publication date: September 13, 2001
    Inventor: Bennie Izaak Pieter Simpelaar