Optical disc device and method for controlling track hold thereof
OwnerToshihiko Kajiinventor
Life of this patent
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Abstract
An optical disk device and a track hold control method thereof which can prevent runaway during tracking and carry out stable tracking even if the optical disk has a large eccentricity. An offset of a lens is monitored during track hold and kicking is effected at a timing at which the offset is the smallest when the lens passes over a track hold position, thus minimizing the offset upon tracking. Since there is no offset of the lens at the time of shifting to the tracking, a track hold processing is carried out stably.
Claims12
An optical disk device comprising a control section for controlling track hold of a pickup with respect to an optical disk which is a recording medium, characterized in that
- in order to effect kicking in the track hold control, the control section operates to measure an offset amount of a lens relative to the center in the pickup, and effect the kicking when the measured offset amount is equal to or smaller than a predetermined value.
An optical disk device comprising a control section for controlling track hold of a pickup with respect to an optical disk which is a recording medium, characterized in that
- in order to carry out tracking after kicking is effected in the track hold, the control section operates to measure an offset amount of a lens relative to the center in the pickup, and carry out no tracking processing until the offset amount becomes equal to or smaller than a predetermined value.
An optical disk device comprising a control section for controlling track hold of a pickup with respect to an optical disk which is a recording medium, characterized in that
- in order to effect kicking in the track hold control, the control section operates to measure an offset amount of a lens relative to the center in the pickup several times, and effect the kicking when the offset amount is reduced each time of the measurements within a predetermined range.
A track hold control method for controlling, in an optical disk device, track hold of a pickup with respect to an optical disk which is a recording medium, characterized in that
- in order to effect kicking in a track hold processing, an offset amount of a lens relative to the center in the pickup is measured, and the kicking is effected only when the measured offset amount is equal to or smaller than a predetermined value.
A track hold control method for controlling, in an optical disk device, track hold of a pickup with respect to an optical disk which is a recording medium, characterized in that
- in order to carry out tracking after kicking is effected in the track hold processing, an offset amount of a lens relative to the center in the pickup is measured so that no tracking processing is carried out until the offset amount becomes equal to or smaller than a predetermined value.
A track hold control method for controlling, in an optical disk device, track hold of a pickup with respect to an optical disk which is a recording medium, characterized in that
- in order to effect kicking in the track hold processing, an offset amount of a lens relative to the center in the pickup is measured several times, and the kicking is carried out when the offset amount is reduced each time of the measurement within a predetermined range.
Dependencies are inferred from the claim text.