Patent ID: 6721255
Filing Date: 2004-04-13
Classification: G11B

Abstract:
A device for recording data onto an optical disc by irradiating laser beam having at least two kinds of power values which are modulated according to data to be recorded, the device comprising:a recording pulse generator that generates a recording pulse signal by modulating the data to be recorded and correcting a predetermined edge position of the recording pulse signal by delaying the edge position in a delay device incorporated in the recording pulse generator to output the corrected recording pulse signal; a laser driver that drives a laser while switching a power value according to the recording pulse signal; a delay amount measuring section that measures a delay amount in the delay device; and a recording pulse position correcting section that corrects the predetermined edge position of the recording pulse based on a result of the measurement of the delay amount in the delay amount measuring section, wherein the recording pulse generator includes a pulse timing generator that generates a reference pulse signal by modulating the data to be recorded, and a delay amount variable delay section that receives the reference pulse signal to output a delay pulse capable of externally changing the delay amount.