Patents by Inventor Akira Satomi

Akira Satomi 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).

  • Discharge lamp driving circuit
    Patent number: 4912374
    Abstract: A discharge lamp driving circuit includes a chopper with a first switching circuit and an inverter with a second switching circuit. The chopper and inverter are connected to a dc voltage source and controlled to produce a composite lamp driving current composed of a high frequency alternating current interrupted by a dc current in order to keep the discharge lamp free from an acoustic resonance. The chopper and the inverter are arranged to have at least one common switching element in their first and second switching circuits.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: March 27, 1990
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Haruo Nagase, Akira Satomi