Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-10-16
2007-10-16
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S053190, C369S053280, C369S053340
Reexamination Certificate
active
10439331
ABSTRACT:
A tilt compensating device and method of performing normal tilt compensation in the event of a servo emergency which may occur during reproduction of data from an optical recording medium are provided. The tilt compensating device includes: an optical pickup; a tilt adjusting unit that adjusts a tilt angle of the optical pickup; a jitter detecting unit that detects an amount of jitter in a reproduction signal output from the optical pickup; and a controlling unit that monitors speed at which the optical recording medium operates using a phase-locked loop (PLL) signal generated from the reproduction signal and the degree of focus of the optical pickup, performs an operation to return to a normal state if any abnormality occurs, and controls operation of the tilt adjusting unit by comparing an amount of jitter detected at regular intervals against a reference. The present invention provides more stable tilt compensation compared to a conventional approach controlling a tilt driver in real time while monitoring jitter, thus improving disk reproduction capability.
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Japanese Office Action; Dated: May 11, 2004.
Hong Dong-ki
Jin Ju-wha
Jung Soo-yul
Park Jee-hyung
Danielsen Nathan
Korzuch William
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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