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Focus servo controlling method and apparatus and optical disk drive using the focus servo controlling method
Focus servo controlling method and apparatus and optical disk drive using the focus servo controlling method
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机译:聚焦伺服控制方法和装置以及使用该聚焦伺服控制方法的光盘驱动器
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摘要
A method and apparatus for controlling a focus servo of an optical disk drive is provided. The focus servo controlling method includes the operations of, when an operating mode enters into a focus pull-in mode, detecting a period of time that satisfies a first threshold condition, the first threshold condition set to determine a duration in which a focal point of an optical signal emitted from a pickup is passing through a cover layer of a disk, the determination made by using a first signal proportional to a detected portion of an optical signal reflected by the disk, and preventing focus servo control from being performed during a detected period of time that first satisfies the first threshold condition since the operating mode entered into the focus pull-in mode.
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