Optical disk recording/reproducing apparatus and rotary drive therefor
US5054014A · kind A · utility
7Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Jan 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for rotationally driving an optical disk in an optical disk recording and/or reproducing apparatus capable of recording or reproducing signals from disks having different sizes includes a spindle motor for rotationally driving a disk, a servo unit for controlling the rotation of the spindle motor, and a control unit for detecting an activation response state of the spindle motor upon starting, and switching a gain of the servo unit on the basis of the detection result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.