Patents by Inventor Wei-Wu Liu

Wei-Wu Liu 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).

  • Method and apparatus of discriminating different types of optical discs
    Patent number: 8036080
    Abstract: A method for discriminating different types of optical discs includes the steps of focusing a beam spot generated by a laser source on an optical disc, and rotating the optical disc; generating a radio frequency signal and a corresponding first signal of the radio frequency signal; comparing a peak-to-peak value of the corresponding first signal with a predetermined value; determining the optical disc as a high density optical disc when the peak-to-peak value of the first signal is smaller than the predetermined value; and, determining the optical disc as a low density optical disc when the peak-to-peak value of the first signal is greater than the predetermined value.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: October 11, 2011
    Assignee: Sunplus Technology Co., Ltd.
    Inventor: Wei-Wu Liu
  • METHOD AND APPARATUS OF DISCRIMINATING DIFFERENT TYPES OF OPTICAL DISCS
    Publication number: 20100014403
    Abstract: A method for discriminating different types of optical discs includes the steps of focusing a beam spot generated by a laser source on an optical disc, and rotating the optical disc; generating a radio frequency signal and a corresponding first signal of the radio frequency signal; comparing a peak-to-peak value of the corresponding first signal with a predetermined value; determining the optical disc as a high density optical disc when the peak-to-peak value of the first signal is smaller than the predetermined value; and, determining the optical disc as a low density optical disc when the peak-to-peak value of the first signal is greater than the predetermined value.
    Type: Application
    Filed: June 3, 2009
    Publication date: January 21, 2010
    Applicant: SUNPLUS TECHNOLOGY CO., LTD.
    Inventor: WEI-WU LIU