Eccentricity suppressing servo method and apparatus
AssigneeLG Electronics Inc.
InventorsDae Ik Kwon, Byung Hoon Min
Life of this patent
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Abstract
An eccentricity suppression control method for suppressing an affect caused by an eccentricity of an optical disc and responding to the eccentricity of the optical disc quickly. In the method, eccentricity amounts according to a phase of the optical disc is detected and estimating correction amounts for each phase suitable for suppressing each of the eccentricity amount according to the phase. The estimating correction amount for each phase is added to a tracking control signal responding to a tracking error, thereby performing a tracking control quickly and accurately.
Claims10
A eccentricity suppressing method, comprising the steps of:
- detecting eccentricity amounts according to a phase of an optical disc;
- providing estimating correction amounts for each phase suitable for suppressing each of the eccentricity amounts;
- and
- responding to a tracking error and the estimating correction amounts for each phase to control a tracking of light beam.
A eccentricity suppressing apparatus, comprising:
- eccentricity detecting means for detecting eccentricity amounts according to a phase of an optical disc;
- suppression amount calculating means for providing estimating correction amounts for each phase suitable for suppressing each of the eccentricity amounts;
- and
- tracking control means for responding to a tracking error and the estimating correction amounts for each phase to control a tracking of light beam.
An optical disc recording/reproducing servo method, comprising the steps of:
- detecting eccentricity amounts according to a phase of an optical disc;
- providing estimating correction amounts for each phase suitable for suppressing each of the eccentricity amounts;
- responding to a tracking error and the estimating correction amounts for each phase to control a tracking of light beam;
- and
- performing a recording and reproduction of an information for the optical disc.
An optical disc driver, comprising:
- eccentricity detecting means for detecting eccentricity amounts according to a phase of an optical disc;
- suppression amount calculating means for providing estimating correction amounts for each phase suitable for suppressing each of the eccentricity amounts;
- tracking control means for responding to a tracking error and the estimating correction amounts for each phase to control a tracking of light beam;
- and
- recording/reproducing means for performing a recording and reproduction of an information for the optical disc.
Dependencies are inferred from the claim text.