Optical pickup actuator focus control with reference to a focus

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

369124, 369 4432, 369 4435, 2502015, G11B 700

Patent

active

055725015

ABSTRACT:
Disclosed is a focus servo circuit for an optical pickup actuator capable of performing a normal focusing operation accurately and fast with detecting predetermined regions of a focus error signal and focus servo drive signal. The circuit has a focus zero detection unit for generating a focus zero detection signal with a detection of a predetermined region including a zero crossing from the focus error signal, a drive signal zero detection unit for generating a focus servo drive zero detection signal with a detection of a predetermined region including a zero crossing from the focus error signal and a unit for controlling the focus start enable signal thereby to start a focus servo of the optical pickup actuator with reference to both of the focus zero detection signal and the focus servo drive zero detection signal.

REFERENCES:
patent: 4891798 (1990-01-01), Shinkai
patent: 5172354 (1992-12-01), Otsubo
patent: 5399849 (1995-03-01), Jung
patent: 5459309 (1995-10-01), Kagami et al.

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 pickup actuator focus control with reference to a focus 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 pickup actuator focus control with reference to a focus , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup actuator focus control with reference to a focus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2020560

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