Apparatus and method for controlling writing power of optical disc
US7554890B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2004 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Apr 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1267
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for recording data on an optical disc, includes detecting optimum writing power from a test area on the optical disc; determining whether or not a current writing power is within a predetermined allowable range set with reference to the detected optimum writing power; and performing a writing operation with the writing power controlled to maintain a reflection signal level corresponding to the detected optimum writing power when the current writing power is within the predetermined allowable range, and performing the writing operation with the writing power controlled based on power update information when the current writing power is not within the predetermined allowable range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.