Invention Grant
- Patent Title: Slip-off preventing tracking control apparatus
- Patent Title (中): 防滑跟踪控制装置
-
Application No.: US337156Application Date: 1989-04-12
-
Publication No.: US5109366APublication Date: 1992-04-28
- Inventor: Mitsuro Moriya , Hiroyuki Yamaguchi , Masayoshi Shioya
- Applicant: Mitsuro Moriya , Hiroyuki Yamaguchi , Masayoshi Shioya
- Applicant Address: JPX Osaka
- Assignee: Matsushita Electric Industrial Co., Ltd.
- Current Assignee: Matsushita Electric Industrial Co., Ltd.
- Current Assignee Address: JPX Osaka
- Priority: JPX63-92023 19880414
- Main IPC: G11B7/085
- IPC: G11B7/085 ; G11B7/09 ; G11B7/095 ; G11B21/08 ; G11B27/10
Abstract:
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.
Public/Granted literature
- US5614895A Map information regenerating device Public/Granted day:1997-03-25
Information query
IPC分类: