Optical disc reproduction apparatus and automatic adjustment...

Details Optical disc reproduction apparatus and automatic adjustment... Optical disc reproduction apparatus and automatic adjustment...

2006-07-04

2006-07-04

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053290

Reexamination Certificate

active

07072253

ABSTRACT:
An optical disc reproduction apparatus is provided for permitting appropriate automatic adjustment to a servo control system, particularly a CD and a DVD-ROM having a BCA.A limit switch24is disposed in such a manner that it detects movement of an optical pickup11to a position which is located at a radius of 23.49 mm from the center. A system controller22moves the optical pickup11by 1.0 mm in an outer radial direction from the position detected by the limit switch24, and reads a signal from an optical disc5at that position to carry out the automatic adjustment to the servo system, through a servo controller21and a feed motor18. As a result, in the CD, a signal within a lead-in area thereof is used for and subjected to the automatic adjustment performed by the servo controller21, while in the DVD-ROM, a signal in an outer peripheral area of a lead-in area having the BCA and in the vicinity thereof is used for and subjected to the adjustment.

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patent: 2002/0003757 (2002-01-01), Uhde et al.
patent: 2003/0016603 (2003-01-01), Tomita

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