Optical disc drive apparatus and servo control method for...

Details Optical disc drive apparatus and servo control method for... Optical disc drive apparatus and servo control method for...

2007-07-20

2010-06-01

Tran, Thang V (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053190

Reexamination Certificate

active

07729215

ABSTRACT:
An optical disc drive apparatus may include an optical pickup that moves along a transportation shaft provided along a radial direction of an optical disc and picks up reflected light after emitting an optical beam via an objective lens to the optical disc; a drive section that controls the objective lens to adjust an angle of the optical beam; an angular velocity detection section that detects an angular velocity around the transportation shaft; storage means for storing coefficients from which the skew of the optical disc around a virtual axis perpendicular to the transportation shaft is calculated using the angular velocity; a skew estimation section that calculates a skew estimate value by multiplying the coefficient by the angular velocity; and a drive signal generation section that generates a drive signal based on the skew estimate value to enable the drive section to adjust the angle of the optical beam.

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patent: 2006/0062106 (2006-03-01), Tsuzuki et al.
patent: 2002-092919 (2002-03-01), None

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