Optical disc apparatus and method for writing data using laser beam
US8045435B2 · kind B2 · utility
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4Claims
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Assignee
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Key dates
| Filing date | Jan 31, 2007 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Sep 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When an optical disc apparatus of the present invention writes to an optical disc, it detects the level of the drive voltage for its laser drive circuit and, based on the detected level, adjusts the drive voltage for its laser diode so as to adjust the drive voltage for the laser drive circuit to a level within an appropriate range. Further, the write speed is also adjusted in accordance with the above adjustment of the drive voltages for the laser drive circuit and the laser diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.