Patents by Inventor Kouhei Yuhara

Kouhei Yuhara 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).

  • Apparatus for starting and operating a discharge lamp
    Patent number: 4847537
    Abstract: An apparatus for starting and operating a discharge lamp includes an inverter circuit. The inverter circuit comprises a parallel resonance circuit including an oscillation coil and capacitor, and which is connected to the discharge lamp, via a current-limiting coil, a switching transistor for triggering the parallel resonance circuit, and a feedback circuit connected to the switching transistor, for allowing a feedback signal for driving the switching transistor to be supplied to the base of the switching transistor, the feedback circuit being magnetically coupled to the current-limiting coil.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: July 11, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiro Ueda, Fuminori Nakaya, Kouhei Yuhara, Nanjou Aoike