Patent ID: 7755982
Filing Date: 2010-07-13
Classification: G11B

Abstract:
1. An optical disc device capable of performing a reproduction process for a hybrid type optical disc having laminated two or more recording layers including a first recording layer and a second recording layer corresponding to laser beams of different wavelengths, the optical disc device comprising: a first laser for emitting a blue laser beam used for reproducing recorded information from the first recording layer; a second laser for emitting a red laser beam used for reproducing recorded information from the second recording layer; an optical pickup for irradiating the hybrid type optical disc with one of the blue and red laser beams for obtaining signals from corresponding one of the first and second recording layers; a laser drive circuit for driving selected one of the first and second lasers; a servo circuit for controlling the optical pickup to select one of the first and second recording layers; a demodulation circuit for demodulating the signals from the optical pickup; and a controller for controlling the laser drive circuit, the servo circuit and the demodulation circuit, the controller being programmed to first perform when the hybrid type optical disc is loaded, a reproduction process for the first recording layer before performing a reproduction process for the second recording layer, the first recording layer reproduction process being given priority over the second recording layer reproduction process, wherein when the hybrid type optical disc is loaded, the controller (1) performs a control process of acquiring first lead-in information for the first recording layer with the first laser after acquiring second lead-in information for the second recording layer with the second laser, and (2) responsive to a reproduction instruction after acquiring the first lead-in information, performs a control process of reproducing the recorded information from the first recording layer before performing the reproduction process for the second recording layer.