Optical disc apparatus and control method thereof

Details Optical disc apparatus and control method thereof Optical disc apparatus and control method thereof

2011-05-10

2011-05-10

Giesy, Adam R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044230, C369S044250

Reexamination Certificate

active

07940612

ABSTRACT:
The present invention provides an optical disc apparatus that reduces access time while suppressing the emanation of heat from a beam expander. A microcomputer manages the operation time and pause time of a stepping motor constructed to move the movable lens of the beam expander, and in accordance with the duration of an immediately previous pause, limits the number of successive stepping-motor driving actions following the pause time, below a maximum permissible count. When the pause duration is shorter than a threshold value or when the number of successive stepping-motor driving actions reaches the maximum permissible count, the microcomputer starts next driving of the stepping motor after a required waiting time.

REFERENCES:
patent: 2007/0189131 (2007-08-01), Kuze et al.
patent: 2006-185498 (2006-07-01), None

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