Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-01-11
2005-01-11
Psitos, Aristotelis M. (Department: 2653)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S044320
Reexamination Certificate
active
06842414
ABSTRACT:
An apparatus and a method for compensating a tilt of an optical recording medium comprising a servo error generating unit for generating RF(Radio Frequency) signal and a servo error signal from an electric signal outputted from an optical pickup unit, a servo control unit for generating a focus operation signal and a tracking operation signal by signal-processing separately a focus error signal and a tracking error signal outputted from the servo error generating unit, performing a focus search at a certain position in order to detect tilt, and generating a tilt operation signal by detecting tilt, a focus servo operation unit for operating a focus actuator inside of the optical pickup unit by receiving the focus operation signal outputted from the servo control unit, and a tilt operation unit for compensating tilt by controlling the pickup unit in accordance with the tilt operation signal outputted from the servo control unit. The present invention is capable of detecting and compensating a tilt of the optical recording and reproducing medium accurately and quickly, and recording and reproducing accurately on the recording medium.
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Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Psitos Aristotelis M.
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