Optical disc system and control method thereof

Details Optical disc system and control method thereof Optical disc system and control method thereof

2008-03-11

2008-03-11

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

C369S053260

Reexamination Certificate

active

07342862

ABSTRACT:
An optical disc system includes a disc recording unit for recording an information signal on an optical disc by switching irradiation power of laser light to be applied to the optical disc in accordance with the information signal. The disc recording unit includes a semiconductor laser; a laser-power controlling circuit for outputting a laser-driving-current instruction signal; a recording-pulse generating circuit for outputting a laser-modulation timing pulse; a laser driving circuit for generating a laser driving current in accordance with the laser-driving-current instruction signal and the laser-modulation timing pulse; and a correction-data storage for storing as correction data the shift between the laser-modulation timing pulse and the pulse position of the laser driving current. The optical disc system further includes a controller for correcting the pulse position of the laser driving current to a desired position by correcting the position of the laser-modulation timing pulse with the correction data.

REFERENCES:
patent: 6188656 (2001-02-01), Shoji et al.
patent: 6359846 (2002-03-01), Shoji et al.
patent: 6671248 (2003-12-01), Miyabata et al.
patent: 7031241 (2006-04-01), Nakajo

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