Light source driving unit and optical storage apparatus
US7518969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2006 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Aug 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/1053
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light source driving unit includes a modulating signal generating section generating modulating signals based on driving waveform generating information of a light source, a current source selecting section selecting one or more currents output from current sources based on the modulating signals, a light source driving section generating a current having multi-levels based on the one or more currents selected and supplying the generated current to the light source to drive the light source so that light in multi-levels is generated from the light source, and a cancelling section adding a signal error amount which cancels differences in amounts of signal delays generated between the modulating signal generating section and the light source driving section at a stage prior to the current source selecting section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.