Information recording/reproducing apparatus with disk having sections of different angular velocity
US4530018A · kind A · utility
46Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1982 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Sep 23, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a data recording/reproducing apparatus, a DC motor is provided for rotating an optical disk. A recording/reproducing head is driven to move over the disk linearly in the radial direction of the disk, thereby defining a plurality of data-storing tracks on the disk. A motor control section is provided for controlling the rotation of the disk so as to change the angular velocity of the disk when the head tracing is changed among the track groups. While the head is tracing the tracks included in the same track group, the rotation of the disk is made constant so that the disk rotates at a constant angular speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.