Invention Grant
- Patent Title: Tracking control device, tracking control method, and optical disc apparatus
- Patent Title (中): 跟踪控制装置,跟踪控制方法和光盘装置
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Application No.: US12793038Application Date: 2010-06-03
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Publication No.: US08085631B2Publication Date: 2011-12-27
- Inventor: Takashi Kishimoto , Takeharu Yamamoto , Yoshirou Kashiwabara , Akihiro Arai
- Applicant: Takashi Kishimoto , Takeharu Yamamoto , Yoshirou Kashiwabara , Akihiro Arai
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2009-135850 20090605
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
The invention provides a tracking control device, a tracking control method, and an optical disc apparatus that enable to stably perform the tracking control, and reduce an influence of stray light from the other layer on the tracking control. A sub push-pull signal correcting section corrects a sub push-pull signal to be generated from returning light of a sub beam in such a manner that a track crossing component of a main push-pull signal to be generated from returning light of a main beam, and a track crossing component of the sub push-pull signal to be generated from the returning light of the sub beam are canceled. A low pass filter reduces a high frequency component of the sub push-pull signal corrected by the sub push-pull signal correcting section. A subtractor subtracts a sub push-pull signal passing the low pass filter from the main push-pull signal to thereby generate a tracking error signal.
Public/Granted literature
- US20100309766A1 TRACKING CONTROL DEVICE, TRACKING CONTROL METHOD, AND OPTICAL DISC APPARATUS Public/Granted day:2010-12-09
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