Patents by Inventor Yutaka Naka

Yutaka Naka 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).

  • Patent number: 5224081
    Abstract: A search operation control apparatus in an optical disc reader searches a desired position on an optical disc which is controllably rotated at a constant linear velocity and has its information pits arranged in a segmental spiral, in response to a search command which includes information of the desired position. The apparatus has an optical pickup, an optical-pickup moving controller, and an optical-disc driving controller. The optical-pickup moving controller controllably moves the optical pickup from a current position to a desired position at high speed when it receives a search command. The optical-disc driving controller controllably drives the optical disc during an acceleration/deceleration control timing, and a free-run or constant-run time. During the high-speed translation of the optical pickup, spindle servocontrol to the optical disc is not executed, but the acceleration/deceleration control process and the free-run or constant-run control process are executed.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: June 29, 1993
    Assignee: Funai Electric Co., Ltd.
    Inventors: Masaru Muraoka, Yutaka Naka, Eiji Miyazaki