Patent ID: 7869322
Filing Date: 2011-01-11
Classification: G11B

Abstract:
1. An optical disc device configured for reproducing recorded information from a two-wavelength two-layer disc comprising a first recording layer corresponding to a first laser light of a first wavelength and a second recording layer corresponding to a second laser light of a second wavelength longer than the first wavelength, the second and first recording layers being arranged from a laser light entering side in that order, and the first recording layer being not optically detected when the second laser light is used; the optical disc device comprising: an optical pickup for irradiating a disc loaded on the optical disc device with selected one of the first laser light and the second laser light; a laser drive circuit for providing a driving signal to the optical pickup for irradiating the disc with the selected one of the first laser light and the second laser light; a reproduction circuit for reproducing a signal from the optical pickup; an output circuit for generating an output signal to provide predetermined information to a user; and a control circuit for controlling the laser drive circuit, the reproduction circuit, and the output circuit, wherein the control circuit is configured to: