Method of unbalanced disc detection
US6965548B2 · kind B2 · utility
2Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 15, 2002 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Apr 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of unbalanced disc detection in a slim type optical drive. In the method of the present invention, the slim type optical drive obtains a first tracking count per round of the disc at a first rotation speed to obtain a first runout. Then, the optical drive obtains a second tracking count per round of the disc at a second rotation speed to obtain a second runout. Finally, deviation of the disc is assessed according to the first runout and the second runout, so that the disc can be determined to be a gravitationally eccentric disc or not.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.