Patents by Inventor Shung-Yunn Wang

Shung-Yunn Wang 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).

  • Track count method for an optical disc in an optical disc system
    Patent number: 6859424
    Abstract: A method for counting a number of tracks of an optical disc in an optical disc system. The optical disc system includes an optical pickup, a light source, and a plurality of optical sensors. The method includes emitting a light beam to the optical disc from the light source, detecting light reflected from the optical disc by the optical sensors, and generating a tracking error signal according to detected signals of the optical sensors while the optical pickup moves along a radial direction of the optical disc. The method further includes generating a tracking error zero crossing signal according to the tracking error signal, generating a peak detecting signal according to the tracking error signal, generating a pseudo radio frequency zero crossing signal according to the peak detecting signal, and generating a track count signal according to the pseudo frequency crossing signal.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: February 22, 2005
    Assignee: Mediatek Incorporation
    Inventors: Shung-Yunn Wang, Hao-Cheng Chen
  • Track count method for an optical disc in an optical disc system
    Publication number: 20040052171
    Abstract: A method for counting a number of tracks of an optical disc in an optical disc system. The optical disc system includes an optical pickup, a light source, and a plurality of optical sensors. The method includes emitting a light beam to the optical disc from the light source, detecting light reflected from the optical disc by the optical sensors, and generating a tracking error signal according to detected signals of the optical sensors while the optical pickup moves along a radial direction of the optical disc. The method further includes generating a tracking error zero crossing signal according to the tracking error signal, generating a peak detecting signal according to the tracking error signal, generating a pseudo radio frequency zero crossing signal according to the peak detecting signal, and generating a track count signal according to the pseudo frequency crossing signal.
    Type: Application
    Filed: November 7, 2002
    Publication date: March 18, 2004
    Inventors: Shung-Yunn Wang, Hao-Cheng Chen
  • Track count method for an optical disc in an optical disc system
    Patent number: RE41177
    Abstract: A method for counting a number of tracks of an optical disc in an optical disc system. The optical disc system includes an optical pickup, a light source, and a plurality of optical sensors. The method includes emitting a light beam to the optical disc from the light source, detecting light reflected from the optical disc by the optical sensors, and generating a tracking error signal according to detected signals of the optical sensors while the optical pickup moves along a radial direction of the optical disc. The method further includes generating a tracking error zero crossing signal according to the tracking error signal, generating a peak detecting signal according to the tracking error signal, generating a pseudo radio frequency zero crossing signal according to the peak detecting signal, and generating a track count signal according to the pseudo frequency crossing signal.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: March 30, 2010
    Assignee: Mediatek Inc.
    Inventors: Shung-Yunn Wang, Hao-Cheng Chen