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    • 81. 发明专利
    • JP3798156B2
    • 2006-07-19
    • JP27047298
    • 1998-09-09
    • G11B7/085G11B21/02G11B21/08
    • In an optical pick-up position detector, an optical pick-up is movable by a motor in radial directions of an optical disk for detecting signals on the optical disk. A driver applies a driving voltage to terminals of the motor for forward or reverse rotation of the motor according to a control signal from a controller. The controller has an input terminal connected to a power supply via a resistor and further has a control terminal for outputting the control signal to the driver according to an electric potential at the input terminal of the controller. A switch is disposed between the input terminal of the controller and one of the terminals of the motor. The switch changes its operating state when the optical pick-up moves to exceed a reference position in a radially inward or outward direction with respect to the optical disk. The switch may be connected to the input terminal of the controller via a diode.
    • 83. 发明专利
    • Magnetic disk device and method of carrying out seek operation
    • 磁盘装置及其执行方法
    • JP2006134376A
    • 2006-05-25
    • JP2004319245
    • 2004-11-02
    • Hitachi Global Storage Technologies Netherlands Bvヒタチグローバルストレージテクノロジーズネザーランドビーブイ
    • UEDA TETSUOISHII SATOSHIYONEDA ISAO
    • G11B21/08G11B21/21
    • G11B5/5547
    • PROBLEM TO BE SOLVED: To reduce noise caused when a lubricant layer on a magnetic disk is smoothed.
      SOLUTION: A magnetic disk device is provided with a read/write mode parameter table 85 which is used to generate a current that is supplied to a voice coil motor, when a magnetic head conducts data writing or reading to or from the magnetic disk. Moreover, the magnetic disk device is provided with a smoothing mode parameter table 84 to generate a current that is supplied to the voice coil motor, when neither data reading nor writing is conducted for the magnetic disk. A CPU controls the current being supplied to the voice coil motor while referring to either the parameter table 85 or the parameter table 84. When a lubricant layer smoothing event is generated, the CPU generates a current to be supplied to the voice coil motor by referring to the parameter table 84 and performs a smoothing process of the lubricant layer while the magnetic head is being sought between the outermost peripheral track and the innermost peripheral track of the magnetic disk.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:为了减少当磁盘上的润滑剂层被平滑时引起的噪声。 解决方案:磁盘装置设置有读/写模式参数表85,该读/写模式参数表85用于产生提供给音圈电机的电流,当磁头进行数据写入或从磁性读取时 磁盘。 此外,磁盘装置设置有平滑模式参数表84,以在不对磁盘进行数据读取或写入时产生提供给音圈电机的电流。 CPU参照参数表85或参数表84控制提供给音圈电机的电流。当产生润滑剂层平滑事件时,CPU通过参照产生要提供给音圈电机的电流 到达参数表84,并且在最外围轨道和磁盘的最内侧轨道之间寻求磁头的同时执行润滑剂层的平滑处理。 版权所有(C)2006,JPO&NCIPI