Patents by Inventor Xing-Xing Lu

Xing-Xing Lu 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).

  • Electronic ballast with lamp flash protection circuit
    Patent number: 5739645
    Abstract: A programmed electronic ballast circuit including a voltage maintenance circuit to ensure that the integrated circuit continues to oscillate and drive the half-bridge inverter until the DC bus voltage falls to a level insufficient to permit the fluorescent bulbs at the output to ignite. Additionally, the voltage maintenance circuit drives the voltage of the integrated circuit down to a level whereby proper resetting of the integrated circuit and proper preheating of the florescent bulb filaments is assured.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: April 14, 1998
    Assignee: Philips Electronics North America Corporation
    Inventors: Yongping Xia, Xing-Xing Lu, John Chou