Patent ID: 7518969

Claim:
An optical storage apparatus which forms recording marks corresponding to a binary signal which is to be recorded on an information recording medium by irradiating light on the information recording medium from a light source which is driven by a plurality of pulse train waveforms which are based on multiple irradiating levels corresponding to the binary signal, said optical storage apparatus comprising: a driving waveform generating information holding section holding timing information indicating each pulse width of the plurality of pulse train waveforms; a modulating signal generating section generating a modulating signal indicating a transition timing of the irradiating level based on the timing information held in said driving waveform generating information holding section; a state transition signal generating section generating a state transition signal instructing a transition of a state corresponding to the irradiating level based on the timing information held in said driving waveform generating information holding section; a state control section controlling the state transition based on the modulating signal generated by said modulating signal generating section, the state transition signal generated by said state transition signal generating section and a preset transition rule, and generating modulating data corresponding to a selected state; and a light source driving section driving the light source based on the modulating signal generated by said modulating signal generating section and the modulating data generated by said state control section.