Automatic power control system for optical disc drive and method thereof
US8115661B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2011 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Apr 11, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for calibrating an initial driving signal for driving an optical pick-up head of an optical disk drive is provided. On one embodiment, said optical disk drive is utilized for reading or writing data on an optical disk, the optical disk includes a plurality of auto power control areas (APC areas) and a plurality of data areas, and the APC areas and the data areas are interleaved in between. In at least one of the APC areas that before the data areas for a normal data writing, an initial driving signal is used for the normal data writing to drive the optical pick-up head to emit laserbeam. A detected level of the laserbeam is then obtained. An update initial driving signal is then calibrated according to the detected level and a target level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.