Device for reading from or writing to recording media in disc form exhibiting unbalance
US6438094B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Feb 11, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a device for reading from or writing to recording media in disc form which has an unbalance compensation means. The object of the invention is to propose a device of this type which has the smallest possible unbalance even when exchangeable recording media are used. This object is achieved according to the invention by virtue of the fact that the unbalance compensation means is a centrifugal force generation means which generates a centrifugal force which is variable during operation. According to another aspect of the present invention, provision is made for the unbalance compensation means to be a positioning means for positioning the recording medium. The field of application of the invention includes, inter alia, devices for reading from and/or writing to optical recording media such as CD, CD-ROM, DVD, DVD-ROM, DVD-RAM and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.