Disk decision method and optical disk drive using the disk decision method
AssigneeToshiba Samsung Storage Technology Korea Corporation
InventorsSeung-hoon Kim, Kwan-ho Chun
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Abstract
A method of determining the type of disk loaded on an optical disk drive, and an optical disk drive using the method are provided. The disk decision method includes operations of detecting a change in the magnitude of a focus error signal generated during a focus search for a recording layer of a disk closest to an outermost layer of the disk, wherein the change in the magnitude of the focus error signal depends on a change in a recording layer of the disk for which aberration correction is performed, and determining a recording layer architecture of the disk according to the detected change in the magnitude of the focus error signal.
Claims22
A disk decision method comprising:
- detecting a change in a magnitude of a focus error signal generated during a focus search for a recording layer of a disk closest to an outermost layer of the disk, wherein the change in the magnitude of the focus error signal depends on which recording layer of the disk aberration correction is performed for;
- and
- determining a recording layer architecture of the disk based on an amount of change in the detected magnitude of the focus error signal.
A disk decision method comprising:
- determining a type of a disk according to a time interval during which an S wave of a focus error signal detected while moving an objective lens of a pickup in a direction perpendicular to a top surface of the disk is generated, when a disk determination mode is enabled;
- and
- determining the recording layer architecture of the disk based on an amount of change in a detected magnitude of the focus error signal, which is detected during a focus search for a recording layer of the disk closest to an outermost layer of the disk, wherein the change in the magnitude of the focus error signal depends on which recording layer of the disk aberration correction is performed for.
A computer readable recording medium having recorded thereon a computer program code for a disk decision method, the method comprising:
- detecting a change in a magnitude of a focus error signal generated during a focus search for a recording layer of a disk closest to an outermost layer of the disk, wherein the change in the magnitude of the focus error signal depends on which recording layer of the disk aberration correction is performed for;
- and
- determining a recording layer architecture of the disk based on an amount of change in the detected magnitude of the focus error signal.
An optical disk drive to operate on a disk, the disk drive comprising:
- a pickup comprising an objective lens projecting an optical signal to the disk via the objective lens and detecting an optical signal reflected from the disk, the pickup further comprising:
- an actuator which moves the position of the objective lens according to an actuator driving control signal,
- and an aberration corrector which corrects aberration according to an aberration correction control signal;
- a signal processor processing optical signals detected by the pickup in order to generate a focus error signal;
- a disk type determination unit detecting a time interval during which an S wave of the focus error signal is generated, and determining a type of the disk according to the detected time interval, when a disk determination mode is enabled;
- a disk layer architecture determination unit detecting a change in a magnitude of the focus error signal, which is detected during a focus search for a recording layer of the disk closest to an outermost layer of the disk, and determining the recording layer architecture of the disk based on an amount of change in the detected magnitude, wherein the change in the magnitude of the focus error signal depends on which recording layer of the disk aberration correction is performed for;
- and
- a controller generating an actuator driving control signal to move the objective lens in a direction perpendicular to a top surface of the disk when a disk type determination mode is enabled, and generating an aberration correction control signal and an actuator driving control signal which are used to execute a focus search according to a change in a recording layer of the disk, for which aberration is corrected, when a disk layer architecture determination mode is enabled.
Dependencies are inferred from the claim text.