Patent ID: 7660220
Filing Date: 2010-02-09
Classification: G11B

Abstract:
1. An optical disc drive apparatus comprising: a laser beam source; a collector device which is disposed as it faces a disc that can record a signal and which collects a laser beam emitted from the laser beam source onto the disc; a record processing module which records the signal on the disc through the collector device while it is modulating laser power of the laser beam source; a reflecting light level detecting module which receives the reflecting light when the signal is recorded and which detects a level of the reflecting light; a laser power control module which controls the laser power when the signal is recorded based on the detected level of the reflecting light; a tilt control module which controls a tilt angle between the disc and the collector device based on the detected level of the reflecting light; a switching module which switches between control of the laser power and control of the tilt angle, wherein the second acquiring module includes wherein the switching module includes a first acquiring module which acquires a first variation that is a variation in the detected level of the reflecting light, a first control module which stops control done by the laser power control module and starts control done by the tilt control module when the first variation is equal to or greater than a first threshold, a second acquiring module which acquires a second variation that is a variation in the laser power, and a second control module which stops control done by the laser power control module and starts control done by the tilt control module when the first variation is below the threshold and the second variation is equal to or greater than a second threshold.