Patent ID: 7573790
Filing Date: 2009-08-11
Classification: G11B

Abstract:
1. A light source driving unit comprising: a driving waveform generating information holding section holding driving waveform generating information based on a driving waveform of a light source; a modulating signal generating section generating a plurality of modulating signals for selecting one or a plurality of currents output from a plurality of current sources based on the driving waveform generating information held in said driving waveform generating information holding section; a light source driving section generating a current having multi-levels based on the one or plurality of currents selected by the plurality of modulating signals generated by said modulating signal generating section, 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 delay adjusting section delaying a generating timing of each of the plurality of modulating signals in said modulating signal generating section by a predetermined amount, so as not to delay a selecting timing of the one or plurality of currents by the plurality of modulating signals generated by said modulating signal generating section.