Patents by Inventor KUN-HUA LU

KUN-HUA LU 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 disc drive and method for detecting vertical deviation thereon
    Patent number: 8416662
    Abstract: An optical disc drive includes a disc holder, a pickup head, a focus servo, an S-curve identifying unit, a first counter, a second counter, a judging unit, a disc identifying unit, and a system controller. The optical disc drive can detect whether a disc exhibits vertical deviation. Upon detection, the optical disc drive restricts the maximum speed of data reading and writing. The judging unit determines whether the disc exhibits vertical deviation based on a comparison result of the number of the one or more S curves with a first preset value.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 9, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Chi-Fan Yu, I-Chun Tseng, Kun-Hua Lu
  • OPTICAL DISC DRIVE AND METHOD FOR DETECTING VERTICAL DEVIATION THEREON
    Publication number: 20110235486
    Abstract: An optical disc drive includes a disc holder, a pickup head, a focus servo, an S-curve identifying unit, a first counter, a second counter, a judging unit, a disc identifying unit, and a system controller. The optical disc drive can detect whether a disc exhibits vertical deviation. Upon detection, the optical disc drive restricts the maximum speed of data reading and writing. The judging unit determines whether the disc exhibits vertical deviation based on a comparison result of the number of the one or more S curves with a first preset value.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 29, 2011
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHI-FAN YU, I-CHUN TSENG, KUN-HUA LU