Patent ID: 8605563

Claim:
An optical disc device comprising: a laser light source driven by a drive signal with a high frequency signal superimposed; a detector for detecting reflection of laser light emitted from the laser light source; and a controller for reading data from an optical disc having a plurality of recording layers with a signal outputted from the detector, wherein: the controller, in shifting a focus of the laser light from a first recording layer to a second recording layer among the plurality of recording layers, performs a first change that changes a setting on the high frequency signal to a predetermined value at which the high frequency signal is superimposed to suppress the peak power of the drive signal if a light density of the second recording layer is higher than a light density of the first recording layer; the controller shifts the focus from the first recording layer to the second recording layer; and the controller, after the focus has been shifted, performs a second change that changes the setting on the high frequency signal to a predetermined value at which the high frequency signal is superimposed to increase the peak power of the drive signal if the light density of the second layer is lower than the light density of the first recording layer.