Optical disc drive

Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C369S030170, C369S044280

Reexamination Certificate

active

07545707

ABSTRACT:
The present invention relates to optical disc drives including a carriage which is movable radially of an optical disc and an objective lens which is supported on the carriage movably in radial directions of the disc for formation and placement of a beam spot on the disc. The invention aims at reducing minute vibration of the objective lens during a seek control stably and reliably. According to the present invention, the minute vibration of an objective lens (104) is reduced by moving the objective lens (104) at a relative speed of zero with respect to a carriage (101) during the seek operation, based on a TZC signal which indicates that the beam spot has crossed over a track in an optical disc (2). In this control, a position of the objective lens (104) in the carriage (101) right before starting the seek operation is detected and stored in a memory (802). Then, a position of the objective lens (53) in the carriage (101) is detected during the seek operation. If an error between this position and the position stored in the memory (802) exceeds a predetermined threshold value, the position of the objective lens (104) in the carriage (101) is corrected to the position stored in the memory (802).

REFERENCES:
patent: 5317550 (1994-05-01), Semba
patent: 5805540 (1998-09-01), Kitai et al.
patent: 5870356 (1999-02-01), Ikeda
patent: 6762981 (2004-07-01), Ono
patent: 5-307755 (1993-11-01), None
patent: 6-044596 (1994-02-01), None
patent: 8-147718 (1996-06-01), None
patent: 9-223317 (1997-08-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Optical disc drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disc drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc drive will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4062811

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.