Disk type reproducing apparatus and revolution control method
US6459668B1 · kind B1 · utility
4Cited by
4References
4Claims
0Family size
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Key dates
| Filing date | Sep 28, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Sep 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The number of revolutions of a disk is once increased to a higher level than a resonance frequency of a rotation support system at the startup of rotation of the disk, and subsequently servo control for a pickup actuator is made to work to read information from the disk. It is possible to increase reproducibility of the disk unbalance correction and improve the apparatus in reliability without generation of vibrations and noises, and to spin the disk at high speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.