Patent ID: 7729217
Filing Date: 2010-06-01
Classification: G11B

Abstract:
1. An optical disc device for recording and reproducing information on and from a write-once-type disc using laser light, comprising: a laser power setting circuit for setting recording laser power by trial writing of test information in the write-once-type disc, the trial writing being performed before a recording operation provided for recording data on the write-once-type disk; and a controller for performing control to reproduce the data recorded during the recording operation, the data being reproduced during an intermittent standby period when the recording operation is not performed, the controller further performing control to adjust a set value of the recording laser power which is set by the laser power setting circuit, the set value of the recording laser power being adjusted based on a β value of a reproduction signal produced when the recorded data are reproduced, the β value being a ratio between {(A the laser power setting circuit sets the recording laser power based on a target β value of the reproduction signal which is required for the write-once-type disc, and the controller compares a β value obtained from the reproduction signal with the target β value and adds or subtracts a predetermined adjustment value to or from the set value of the recording laser power based on a relationship between the β value obtained from the reproduction signal and the target β value.