Patents by Inventor Kyouzi Shimoda

Kyouzi Shimoda 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).

  • Optical disc system with improved track jumping operation
    Patent number: 5184338
    Abstract: In an optical disc system having a tracking actuator for driving a light spot on an optical disc in a radial direction thereof; a photodetector for detecting off-track information in respect of the light spot position; a circuit for driving the tracking actuator and track-jumping the light spot to an adjacent track; an acceleration pulse generating circuit for generating an acceleration pulse signal to accelerate the tracking actuator during a track jumping operation; a deceleration pulse generating circuit for generating a deceleration pulse signal to decelerate the tracking actuator during the track jumping operation; and a center detecting circuit for detecting a center position between adjacent tracks in response to an output signal of the photodetector, the optical disc system is characterized by including a switching device responsive to an output signal of the center detecting circuit for switching from the acceleration pulse signal to the deceleration pulse signal after a predetermined period of time
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: February 2, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kyouzi Shimoda, Kyosuke Yoshimoto