Optical disc player having a disk offset detection and protection
US5384761A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1991 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Nov 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk player is provided which includes a disk driving unit for driving an optical disk, a traverse count circuit for counting the number of recording tracks on the optical disk traversed by an optical pickup, an angle detection circuit for detecting the rotational angle through which the optical disk is rotated, and a stop control unit supplied with a count output from the traverse counting unit and a detection output from the angle detection unit. The stop control unit checks to see if the count value by the traverse count unit during rotation by a predetermined angle of the optical disk by the disk driving unit reaches a predetermined number of tracks corresponding to an allowable offset. The stop control unit halts the driving of the optical disk if the count value reaches the aforementioned predetermined number of tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.