Patents by Inventor Toru Kawabata

Toru Kawabata 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).

  • Stepping motor control device and optical head drive device
    Patent number: 6222340
    Abstract: According to a control device for a stepping motor of the present invention, in a first operation mode, a microstep driving section 16 is selected, and an output of this microstep driving section 16 is applied to a driving section 21 through a command selector 12, whereby a stepping motor 25 is microstep driven by this driving section 21. Furthermore, in a second operation mode, a forced driving section 15 is selected, and an output of this forced driving section 15 is applied to the driving section 21 through the command selector 12, whereby the stepping motor 25 is forced driven by this driving section 21, i.e., a high-speed rotation of a rotor 29 is started from any rotation angle with the microstep driving.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: April 24, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toru Kawabata, Yoshihiro Mushika, Masayoshi Shioya