Tilt control device and method

Details Tilt control device and method Tilt control device and method

2005-04-05

2005-04-05

Edun, Muhammad (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053120, C369S044320, C369S044270

Reexamination Certificate

active

06876614

ABSTRACT:
The present invention relates to a tilt control device and method for an optical disc player, wherein an output offset of a tilt detecting means (3) is calibrated by using an output of a focus controller (7). Since the offset is calibrated based on the focus controlling output, the calibration can be performed for all written and non-written discs. As an alternative, a tilt control with high accuracy can be performed by adjusting a tilt frame based on at least two measurements of the controlling output of said focus control means at different radial positions. Thereby, the disc can be positioned in a radial tilt zero position with the aid of the focus controlling output. Now, the tilt detecting means is no longer required for tilt adjustment.

REFERENCES:
patent: 6282161 (2001-08-01), Son et al.
patent: 6545958 (2003-04-01), Hirai et al.
Patent Abstracts of Japan, Oki Yutaka, “Tilt Control Method For Disk Player,” Publication No. 10083549, Mar. 31, 1998, Application No. 08235254, Sep. 5, 1996.

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