Optical disk device and method for setting recording power and erasing power
US6031803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1998 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Nov 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk device comprises a power ratio setting circuit for setting ratio of recording power to erasing power in a predetermined ratio, a recording start point detection circuit for detecting a recording start point by performing at least two cycle recording over the same area in a predetermined test region to detect a recording power and an erasing power of the recording start point, and a power setting circuit for setting a final recording power and erasing power for recording in a user region of the optical disk by multiplying the recording power and the erasing power of the recording start point by predetermined values respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.