发明授权
- 专利标题: Optical disc drive and optical disc controller
- 专利标题(中): 光盘驱动器和光盘控制器
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申请号: US10386612申请日: 2003-03-12
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公开(公告)号: US06925037B2公开(公告)日: 2005-08-02
- 发明人: Takashi Kishimoto , Takeharu Yamamoto , Yoshihiro Kanda , Jun Kikuchi
- 申请人: Takashi Kishimoto , Takeharu Yamamoto , Yoshihiro Kanda , Jun Kikuchi
- 申请人地址: JP Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Akin Gump Strauss Hauer & Feld LLP
- 优先权: JP2002-068100 20020313
- 主分类号: G11B7/085
- IPC分类号: G11B7/085 ; G11B7/00
摘要:
An optical disc drive includes: an optical head with an actuator and a photodetector; a tracking driver outputting a drive signal to the actuator; a first tracking error signal generator for generating a first tracking error signal based on an output signal of the photodetector; first and second lens position control sections for respectively outputting first and second lens position control signals to the tracking driver; and a selector for selectively supplying the first tracking error signal to the first or second lens position control section according to a moving velocity of the optical head during a seek operation. The first lens position control signal is obtained by extracting signal components, of which the frequencies are equal to or lower than a predetermined frequency, from the first tracking error signal. The second lens position control signal is obtained by extracting DC components of the first tracking error signal at on-track points thereof.
公开/授权文献
- US20030210619A1 Optical disc drive and optical disc controller 公开/授权日:2003-11-13