Focus servo control method in optical disc device

Details Focus servo control method in optical disc device Focus servo control method in optical disc device

2006-03-22

2009-11-24

Meier, Stephen D (Department: 2853)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

C347S101000

Reexamination Certificate

active

07623420

ABSTRACT:
A focus servo control method for an optical disc device is provided which compensates for variations present on the disc while printing a label on a label surface of the disc. The label surface of the disc is radially divided into a plurality of areas arranged about the center of the disc, and a focus swing operation is performed for each of the radially divided areas to detect an RF signal. Respective center points of pulses in the detected RF signal are regarded as optimal focus points, and focus driving voltages corresponding respectively to the center points are detected and stored in association with the corresponding areas. When a label is printed on the label surface, feed-forward focus servo control is performed based on the stored focus driving voltages. Accordingly, feed-forward focus servo control can be performed while compensating for variations the disc, thereby improving the label printing operation and quality of the resulting label.

REFERENCES:
patent: 4497049 (1985-01-01), d'Alayer de Costemore d'Arc
patent: 5959280 (1999-09-01), Kamatani
patent: 6202550 (2001-03-01), Lee et al.
patent: 2001/0035886 (2001-11-01), Bradshaw et al.
patent: 2002/0112534 (2002-08-01), Leigh et al.
patent: 2002/0171969 (2002-11-01), Leigh et al.
patent: 2003/0179674 (2003-09-01), Anderson et al.
patent: 2003/0179679 (2003-09-01), Morishima
patent: 2004/0136291 (2004-07-01), Hayashi
patent: 2005/0057639 (2005-03-01), Van Brocklin et al.
patent: 2005/0058043 (2005-03-01), Koegler, III et al.
patent: 2005/0058044 (2005-03-01), Koegler, III et al.
patent: 2006/0215523 (2006-09-01), Park
patent: 2006/0244811 (2006-11-01), No
patent: 2006/0256677 (2006-11-01), Bahng
patent: 0 532 997 (1993-03-01), None
patent: 1 553 591 (2005-07-01), None
patent: WO 03/012995 (2003-02-01), None
Chinese Office Action dated Jun. 8, 2007.
European Search Report dated Dec. 11, 2006.
European Search Report dated Mar. 6, 2007.

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