INTEGRATED CIRCUIT AND OPTICAL DISC DEVICE

摘要

Disclosed is an integrated circuit which is provided with: a focus control unit, which performs focus control wherein drive signals for a focus direction displacement unit are generated on the basis of focus error signals; a focus control abnormality determining unit, which determines absence/presence of an abnormality in the focus control; and a storage unit, which stores abnormal time control signals to be used when the focus control is abnormal, said control signals corresponding to a plurality of rotation angles. The focus control unit stops the focus control, at the radius position where it is determined, by means of the focus control abnormality determining unit, that there is an abnormality of the focus control, and on the basis of abnormal time control signals stored in the storage unit, drive signals for the focus direction displacement unit are generated corresponding to the rotation angles.