Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1997-12-12
1999-07-20
Edun, Muhammad
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4434, 369 4427, G11B 709
Patent
active
059264470
ABSTRACT:
In an optical disk apparatus, a method for enhancing data access time during an access operation of an optical pickup to an access target track whereby an accuracy of feed seek is optimized while decreasing the number of times a track jump operation is performed. The method includes the steps of: determining a maximum operating range for a right-and-left movement of an optical system of the optical disk apparatus for a feed seek operation, when not performing a write or read operation; determining a track jump accuracy to obtain an optimal control condition that provides a track jumping operation from a starting track on a recording medium toward a target track of the recording medium at intervals corresponding to a number of tracks between the starting track and the target track, when not performing the write or read operation; and controlling the track jump operation by the optimal control condition based on results of the determined maximum operating range and results of the determined track jump accuracy during a write or read operation. The maximum operating range may be determined by detecting a signal of a focus system at a state where the focus control is not capable of being performed when the right-and-left movement of the optical system reaches an operating limitation which prevents the optical system from performing an up-and-down movement.
REFERENCES:
patent: 5136569 (1992-08-01), Fennema et al.
Edun Muhammad
Samsung Electronics Co,. Ltd.
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