发明授权
- 专利标题: Slip-off preventing tracking control apparatus
- 专利标题(中): 防滑跟踪控制装置
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申请号: US337156申请日: 1989-04-12
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公开(公告)号: US5109366A公开(公告)日: 1992-04-28
- 发明人: Mitsuro Moriya , Hiroyuki Yamaguchi , Masayoshi Shioya
- 申请人: Mitsuro Moriya , Hiroyuki Yamaguchi , Masayoshi Shioya
- 申请人地址: JPX 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: JPX Osaka
- 优先权: JPX63-92023 19880414
- 主分类号: G11B7/085
- IPC分类号: G11B7/085 ; G11B7/09 ; G11B7/095 ; G11B21/08 ; G11B27/10
摘要:
In an apparatus in which information is reproduced by projecting/receiving an optical beam to/from a recording carrier having a large number of information tracks, tracking control is performed so as to keep a reproducing position on an information track by supplying a track deviation signal to an actuator. If this track deviation signal becomes asymetric by an inclination, etc. of the recording carrier so that a shock is applied to the apparatus, jumping out of a track occurs, resulting in slipping-off of the reproducing position. This slipping-off can be prevented by detecting a position of a movable support member carrying a focusing lens for projecting and receiving the optical beam and feeding back the position signal to the tracking control system, or by extracting a low-frequency component of an output signal of a control circuit and feeding back the extracted signal to the tracking control system.
公开/授权文献
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