Patent ID: 8953429
Filing Date: 2015-02-10
Classification: G11B

Abstract:
1. An optical disc device comprising: an optical pickup unit including a laser irradiation unit that shines a laser light and a light-receiving unit that receives return light of the laser light; a high-frequency generating unit configured to generate a high-frequency signal; a drive unit configured to superimpose the high-frequency signal generated by the high-frequency generating unit onto a specified drive signal to generate the drive signal that drives the laser irradiation unit; and a control unit that controls the high-frequency generating unit such that, in states in which playback of the optical disc is halted while irradiation with the laser light is being performed, a signal level of the high-frequency signal to be superimposed is set at a first signal level other than zero so as to be smaller than in states in which the playback is performed; wherein the control unit controls the high-frequency generating unit such that, if servo misalignment in the optical pickup unit is detected after the signal level of the high-frequency signal to be superimposed is decreased, then the signal level of the high-frequency signal to be superimposed is increased, and the high-frequency superimposition is then performed.