Patents by Inventor Hua-Ting Chi

Hua-Ting Chi 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 drives and method for controlling track-seeking for optical disk drives
    Patent number: 8289825
    Abstract: The invention provides an optical disk drive. The optical disk drive comprises a pickup head, a seek control device, a lens vision characteristic decoder, and an anti lens shift device. The pickup head comprises a sled and a lens for projecting a beam on a disk. The seek control device moves the sled, and shifts the lens with a shift distance relative to an origin at a center of the sled. The equalizer derives a servo signal from a reflection of the beam. The lens vision characteristic decoder obtains a vision characteristic of the lens according to the servo signal and determines a track-on direction according to the vision characteristic. The anti lens shift device triggers the seek control device to perform a track-on process according to the track-on direction.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: October 16, 2012
    Assignee: Mediatek Inc.
    Inventors: Ming-Tsang Wu, Yu-Chun Lin, Ying-Feng Huang, Hua-Ting Chi
  • OPTICAL DISK DRIVES AND METHOD FOR CONTROLLING TRACK-SEEKING FOR OPTICAL DISK DRIVES
    Publication number: 20090279395
    Abstract: The invention provides an optical disk drive. The optical disk drive comprises a pickup head, a seek control device, a lens vision characteristic decoder, and an anti lens shift device. The pickup head comprises a sled and a lens for projecting a beam on a disk. The seek control device moves the sled, and shifts the lens with a shift distance relative to an origin at a center of the sled. The equalizer derives a servo signal from a reflection of the beam. The lens vision characteristic decoder obtains a vision characteristic of the lens according to the servo signal and determines a track-on direction according to the vision characteristic. The anti lens shift device triggers the seek control device to perform a track-on process according to the track-on direction.
    Type: Application
    Filed: May 6, 2008
    Publication date: November 12, 2009
    Applicant: MEDIATEK INC.
    Inventors: Ming-Tsang Wu, Yu-Chun Lin, Ying-Feng Huang, Hua-Ting Chi