System for detecting a CD on a tray in a compact disk player having a magazine containing a plurality of disks
US5077717A · kind A · utility
3Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Nov 21, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A CD player has a magazine containing a plurality of trays each of which is provided for mounting a CD, and a moving device for moving one of the CDs between the magazine and a playback position. Switches are provided for producing CD position signals each of which represents a CD position on a path of the moving tray, and a photosensor is provided for detecting the CD passing the CD position informed by said CD position signal. A display indicates whether the CD exists on the tray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.