Disc having a semiconductor memory
US6359842B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1999 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Oct 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For providing a recording disc, on which information can be renewed by signals, such as electromagnetic waves, and further with which unnecessary vibration due to an eccentricity in center of gravity of the disc can be reduced when the disc is rotated at high rotation velocity, wherein there are positioned an antenna portion, which enables to receive information and/or electric power on the disc, and a memory chip(s) for transmitting the information received to the disc and for renewing that information. Further, for reducing the eccentricity in center of gravity of the disc, a counter balance and/or a label portion and/or the antenna portion and/or an other memory chip(s) and/or a battery are positioned so that they are in balance to the memory chip(s) on the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.