Record/playback head positioning device for optical disc apparatus
US4583212A · kind A · utility
14Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1983 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Aug 11, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/085
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc recording and playback apparatus has a record/playback head adapted to write data into and read them out of information tracks formed on a rotatable optical disc. A carriage carrying the head therewith is driven by a linear motor in the radial direction of the disc perpendicular to the tracks, and then stopped and held at a desired track position. Thereafter, a tracking control is performed by allowing the head to move in the radial direction within a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.