Laser driving method and device, and recording/reproducing device and method
US6842469B2 · kind B2 · utility
7Cited by
18References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/1053
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a power supply circuit, a first power-supply voltage supplied to a laser driving circuit for driving a short-wavelength semiconductor laser of an optical pickup is made higher than a second power-supply voltage supplied to circuits except the laser driving circuit, for example, a reproducing system, a servo system and a recording system. Thus, the power consumption in a device for driving a short-wavelength semiconductor laser such as an InGaN-based semiconductor laser is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.