Patents Assigned to DPHI Acquistions, Inc.
  • Tracking and focus servo system with head load
    Patent number: 6930963
    Abstract: A head load algorithm for an optical disk drive is presented. On startup, the optical media can be spun up. Then an optical pick-up unit can be positioned at an extreme position, for example at the inner diameter, and focus can be closed. The optical pick-up unit then can be incrementally moved away from the extreme position while the tracking error signal is monitored to locate an area of the optical media with tracks. Once the area is located, a tracking servo system can close on one of the tracks.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: August 16, 2005
    Assignee: DPHI Acquistions, Inc.
    Inventors: Ron J. Kadlec, Charles R. Watt, Christopher J. Turner, Hans B. Wach