Patents by Inventor Toshiaki Nishiguchi

Toshiaki Nishiguchi 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).

  • Focus operation for an optical disk device
    Patent number: 7319646
    Abstract: A disk device in which at the recovery job of a focus pull-in operation, a CPU supplies servo control means with the respective correction values of the rotational speed of an optical disk and the moving speed of a lens which are described in the data table of a RAM, and performs the focus pull-in operation and determines whether or not the focus pull-in operation is successfully performed at the respective adjustment steps, and if the focus pull-in operation is successfully performed, the servo control means changes the amount of movement of the lens in response to a surface swing of the optical disk.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: January 15, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Toshiaki Nishiguchi
  • Optical disk device
    Publication number: 20040109397
    Abstract: A disk device in which at the recovery job of a focus pull-in operation, a CPU supplies servo control means with the respective correction values of the rotational speed of an optical disk and the moving speed of a lens which are described in the data table of a RAM, and performs the focus pull-in operation and determines whether or not the focus pull-in operation is successfully performed at the respective adjustment steps, and if the focus pull-in operation is successfully performed, the servo control means changes the amount of movement of the lens in response to a surface swing of the optical disk.
    Type: Application
    Filed: October 17, 2003
    Publication date: June 10, 2004
    Inventor: Toshiaki Nishiguchi