Patents by Inventor Yoshiyuki Ootsuka

Yoshiyuki Ootsuka 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 disk unit
    Patent number: 6721248
    Abstract: An optical disk unit for recording information on and reproducing information from a disk recording medium by projecting a light beam thereonto includes a signal level detection part detecting a level of a track error signal generated based on reflected light of the light beam from the disk recording medium, a scattered light detection part detecting scattering of the reflected light, and an off-track detection part which detects an off-track of the light beam using detection signals supplied from the signal level detection part and scattered light detection part.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: April 13, 2004
    Assignee: Teac Corporation
    Inventors: Mitsumasa Kubo, Tadao Yamanouchi, Yuichi Sakamoto, Yoshiyuki Ootsuka
  • Optical disk unit
    Publication number: 20020003758
    Abstract: An optical disk unit for recording information on and reproducing information from a disk recording medium by projecting a light beam thereonto includes a signal level detection part detecting a level of a track error signal generated based on reflected light of the light beam from the disk recording medium, a scattered light detection part detecting scattering of the reflected light, and an off-track detection part which detects an off-track of the light beam using detection signals supplied from the signal level detection part and scattered light detection part.
    Type: Application
    Filed: May 29, 2001
    Publication date: January 10, 2002
    Applicant: TEAC CORPORATION
    Inventors: Mitsumasa Kubo, Tadao Yamanouchi, Yuichi Sakamoto, Yoshiyuki Ootsuka