Power control system and related method
US7697399B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2007 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Apr 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0909
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for controlling a specific output power level emitted from a laser diode (LD) in an optical pick-up head unit (OPU) is disclosed. The LD is configured to provide a plurality of output power levels for accessing/recording an optical disc. The method includes: determining a specific power control value according to a first output power level, a second output power level, a first power control value of the first output power level, and the specific output power level, wherein the first output power level is less than the specific output power level and greater than the second output power level; and driving the LD to emit the specific output power level according to the specific power control value, the first power control value, and a second power control value of the second output power level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.