Invention Grant
- Patent Title: Optical disc apparatus
- Patent Title (中): 光盘装置
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Application No.: US11464076Application Date: 2006-08-11
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Publication No.: US07706217B2Publication Date: 2010-04-27
- Inventor: Akihiko Doi
- Applicant: Akihiko Doi
- Applicant Address: JP Kawasaki
- Assignee: Toshiba Samsung Storage Technology Corporation
- Current Assignee: Toshiba Samsung Storage Technology Corporation
- Current Assignee Address: JP Kawasaki
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2005-269125 20050915
- Main IPC: G11B7/09
- IPC: G11B7/09

Abstract:
An optical disc apparatus includes an emitter which emits a laser beam to a optical disc, a divided photodetector including a first divided portion and a second divided portion disposed in a light path of the reflected beam from the optical disc, and producing a first photodetector signal and a second photodetector signal, a phase difference detector which produces a phase difference signal from a phase difference between the first and the second photodetector signals, an integrator which produces a integral signal from a integration of the phase difference signal, a tracking controller configure to perform tracking control based on the integral signal, and a limiter which limits a signal to be supplied from the divided photodetector to the phase difference detector or a signal to be supplied from the phase difference detector to the integrator based on a detection status of a signal detected by the divided photodetector.
Public/Granted literature
- US20070076545A1 OPTICAL DISC APPARATUS Public/Granted day:2007-04-05
Information query
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