Head seeking control apparatus with changeable speed references
US5406535A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Mar 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08541
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head control apparatus of the invention includes a moving unit for moving an optical head to a given information track on an optical disk having concentric information tracks, a detector for detecting a direction of movement of the optical head from the a signal reproduced from the optical head, and a controller that, when the detector has detected the direction of movement of the optical head, controls the moving unit so that the optical head may move to a specified information track at a first speed, and that, when the detector has not detected the direction of movement the optical head, controls the moving unit so that the optical head may move to a specified information track at a second speed slower than the first speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.