Tilt control method and apparatus for optical disc recording...

Details Tilt control method and apparatus for optical disc recording... Tilt control method and apparatus for optical disc recording...

2003-11-12

2009-08-18

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044320, C369S047270

Reexamination Certificate

active

07577069

ABSTRACT:
An offset adjustment signal is recorded in a test recording area provided on the inner side of a disc while modifying the level of a driving signal for offset detection that is supplied to a tilt adjustment coil. Thereafter, an operation to play back the offset adjustment signal is performed, and a β value is detected from an RF signal that is played back. When a signal is recorded for which the detected β value reaches a maximum, the level of the driving signal supplied to the tilt adjustment coil is set as an offset value. Tilt control is then performed by adding the offset value to a tilt signal for performing tilt control.

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