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1. 发明申请

US20060203375A1 MAGNETIC DISK DRIVE AND MAGNETIC DISK DRIVE CONTROL 失效
标题翻译：磁盘驱动和磁盘驱动控制
公开(公告)号：US20060203375A1
公开(公告)日：2006-09-14
申请号：US11138244
申请日：2005-05-25
申请人： Yoshikatsu Fujii , Sadahiro Nishida , Osamu Beppu , Shinji Matsushita , Hidefumi Tominaga
发明人： Yoshikatsu Fujii , Sadahiro Nishida , Osamu Beppu , Shinji Matsushita , Hidefumi Tominaga
IPC分类号： G11B21/02
CPC分类号： G11B21/12 , G11B19/04 , G11B19/06
摘要： Embodiments of the invention provide a magnetic disk drive and magnetic disk drive control method for unloading a head safely with a simple configuration when a positioning control signal cannot be detected due, for instance, to a seek error. In one embodiment, when a head cannot detect servo information prerecorded on a disk, a positioning control section resets and starts a time counting section, and switches to an unloading control section for causing the unloading control section to output a position control signal to a VCM driver. The time counting section counts tacho-pulses generated by a motor driver, and outputs time information. The unloading control section receives the time information from the time counting section. In accordance with the received time information, the unloading control section computes the position control signal that the positioning control section outputs to the VCM driver. In this instance, the unloading control section controls the VCM driver to provide such an electrical current profile that the drive current to be supplied to a VCM is small at an initial stage and large at a later stage.
摘要翻译：本发明的实施例提供一种磁盘驱动器和磁盘驱动器控制方法，当由于例如寻道误差而不能检测定位控制信号时，以简单的配置来安全地卸载磁头。在一个实施例中，当头不能检测到预先记录在盘上的伺服信息时，定位控制部分复位并启动时间计数部分，并且切换到卸载控制部分，以使卸载控制部分向VCM输出位置控制信号司机。时间计数部分计算由电机驱动器产生的转速脉冲，并输出时间信息。卸载控制部分从时间计数部分接收时间信息。根据接收到的时间信息，卸载控制部分计算定位控制部分向VCM驱动器输出的位置控制信号。在这种情况下，卸载控制部分控制VCM驱动器以提供在初始阶段提供给VCM的驱动电流较小并在稍后阶段较大的电流分布。

2. 发明授权

US07133242B2 Magnetic disk drive and magnetic disk drive control 失效
标题翻译：磁盘驱动器和磁盘驱动器控制
公开(公告)号：US07133242B2
公开(公告)日：2006-11-07
申请号：US11138244
申请日：2005-05-25
申请人： Yoshikatsu Fujii , Sadahiro Nishida , Osamu Beppu , Shinji Matsushita , Hidefumi Tominaga
发明人： Yoshikatsu Fujii , Sadahiro Nishida , Osamu Beppu , Shinji Matsushita , Hidefumi Tominaga
IPC分类号： G11B21/02 , G11B5/596
CPC分类号： G11B21/12 , G11B19/04 , G11B19/06
摘要： Embodiments of the invention provide a magnetic disk drive and magnetic disk drive control method for unloading a head safely with a simple configuration when a positioning control signal cannot be detected due, for instance, to a seek error. In one embodiment, when a head cannot detect servo information prerecorded on a disk, a positioning control section resets and starts a time counting section, and switches to an unloading control section for causing the unloading control section to output a position control signal to a VCM driver. The time counting section counts tacho-pulses generated by a motor driver, and outputs time information. The unloading control section receives the time information from the time counting section. In accordance with the received time information, the unloading control section computes the position control signal that the positioning control section outputs to the VCM driver. In this instance, the unloading control section controls the VCM driver to provide such an electrical current profile that the drive current to be supplied to a VCM is small at an initial stage and large at a later stage.
摘要翻译：本发明的实施例提供一种磁盘驱动器和磁盘驱动器控制方法，当由于例如寻道误差而不能检测定位控制信号时，以简单的配置来安全地卸载磁头。在一个实施例中，当头不能检测到预先记录在盘上的伺服信息时，定位控制部分复位并启动时间计数部分，并且切换到卸载控制部分，以使卸载控制部分向VCM输出位置控制信号司机。时间计数部分计算由电机驱动器产生的转速脉冲，并输出时间信息。卸载控制部分从时间计数部分接收时间信息。根据接收到的时间信息，卸载控制部分计算定位控制部分向VCM驱动器输出的位置控制信号。在这种情况下，卸载控制部分控制VCM驱动器以提供在初始阶段提供给VCM的驱动电流较小并且在稍后阶段较大的电流分布。

3. 发明授权

US06920007B2 Load/unload method and a magnetic disk drive using the method 失效
标题翻译：使用方法加载/卸载方法和磁盘驱动器
公开(公告)号：US06920007B2
公开(公告)日：2005-07-19
申请号：US10067401
申请日：2002-02-07
申请人： Hidefumi Tominaga , Tsuyoshi Arai , Takao Horiguchi , Toshiyuki Kikuta , Yoshikatsu Fujii
发明人： Hidefumi Tominaga , Tsuyoshi Arai , Takao Horiguchi , Toshiyuki Kikuta , Yoshikatsu Fujii
IPC分类号： G11B5/54 , G11B5/60 , G11B21/12 , G11B21/21 , G11B21/02
CPC分类号： G11B5/6005 , G11B5/54 , G11B21/12 , G11B21/21
摘要： To control load/unload operation of a slider with magnetic head mounted thereon, by which the speed can always be controlled stably while avoiding the slowdown or temporary stop of an actuator during load/unload operation, a magnetic disk drive is configured using magnetic disk media with the servo information written therein beforehand up to the track located at a position corresponding to the landing zone for the load operation of the magnetic head (slider). The speed of the magnetic head (slider) withdrawn to the ramp is controlled at the unload operation. In the stage of initialization for controlling the speed of the load/unload operation, various parameters are recorded and updated to apply a voltage to power amplifier for compensating for the external forces caused by the friction mainly exerted between ramp and slider support members, with reference to the take-off track or the landing track specified in the landing zone.
摘要翻译：为了控制具有安装在其上的磁头的滑块的装载/卸载操作，通过该滑动器总是可以稳定地控制速度，同时避免在加载/卸载操作期间致动器的减速或暂时停止，磁盘驱动器使用磁盘介质其中预先写入的伺服信息直到位于对应于着陆区的位置处的磁道用于磁头（滑块）的加载操作。在卸载操作中控制撤回到斜坡的磁头（滑块）的速度。在用于控制加载/卸载操作速度的初始化阶段，记录和更新各种参数以向功率放大器施加电压，以补偿主要由斜坡和滑动器支撑构件之间施加的摩擦引起的外力，参考到着陆区指定的起飞轨道或着陆轨道。

4. 发明授权

US07375917B1 Idle seek calibration method for magnetic disk drive and magnetic disk drive with an intermission calibration 失效
标题翻译：用于中断校准的磁盘驱动器和磁盘驱动器的空闲寻道校准方法
公开(公告)号：US07375917B1
公开(公告)日：2008-05-20
申请号：US09517176
申请日：2000-03-02
申请人： Yoshikatsu Fujii , Tsuyoshi Arai , Toshiyuki Kikuta , Takao Horiguchi , Shinji Matsushita
发明人： Yoshikatsu Fujii , Tsuyoshi Arai , Toshiyuki Kikuta , Takao Horiguchi , Shinji Matsushita
IPC分类号： G11B5/55
CPC分类号： G11B19/00 , G11B5/5534 , G11B19/046
摘要： When an idle seek operation of a magnetic disk drive is executed under a velocity control utilizing a back electromotive force of a VCM actuator, the accuracy of the velocity control is deteriorated due to temperature variation of the VCM. To eliminate this disadvantage, a calibration of the velocity control is executed by using control information, such as a track number read from the magnetic disk medium. After the velocity control has been executed for an appointed period, by detecting the back electromotive force from the VCM actuator, an MR sense current and a power of a read write LSI are turned on for a time, positioning information on the magnetic disk medium is read out, parameters to be used for the velocity control are calibrated, and thus a stability of the control can be obtained. Hereby, because the positioning information on the magnetic disk medium is not used constantly, the power consumption during the idle seek operation is reduced, and a stable control of the movement can be obtained as well. For a portable system such as a notebook type personal computer in which a magnetic disk drive is employed, the operation is improved with respect to the use of a battery.
摘要翻译：当利用VCM致动器的反电动势的速度控制来执行磁盘驱动器的空闲搜索操作时，由于VCM的温度变化，速度控制的精度降低。为了消除这种缺点，通过使用诸如从磁盘介质读取的轨道号等控制信息来执行速度控制的校准。在指定时间段内执行速度控制后，通过检测来自VCM致动器的反向电动势，MR读取电流和读取写入LSI的功率一段时间被打开，磁盘介质上的定位信息为读出，用于速度控制的参数被校准，因此可以获得控制的稳定性。因此，由于不是不断地使用磁盘介质上的定位信息，因此减少了空闲寻找操作期间的功耗，并且还可以获得稳定的运动控制。对于诸如使用磁盘驱动器的笔记本式个人计算机的便携式系统，关于使用电池的操作得到改善。

5. 发明授权

US06950264B2 Disk drive system for controlling seek operations 失效
标题翻译：用于控制寻道操作的磁盘驱动器系统
公开(公告)号：US06950264B2
公开(公告)日：2005-09-27
申请号：US10206869
申请日：2002-07-26
申请人： Takao Horiguchi , Tatsuya Ito , Takao Araki , Yoshikatsu Fujii , Shinji Matsushita
发明人： Takao Horiguchi , Tatsuya Ito , Takao Araki , Yoshikatsu Fujii , Shinji Matsushita
IPC分类号： G11B5/55 , G11B21/02 , G11B5/596 , G11B15/18
CPC分类号： G11B5/5547
摘要： In a disk drive system, a data transducer control during a seek operation is based on the distance to be traversed. Acceleration of a motor coupled to the head initiates movement of the head. Deceleration of the motor is initiated based on the distance traversed by the head.
摘要翻译：在磁盘驱动器系统中，在寻道操作期间的数据传感器控制基于所要穿过的距离。耦合到头部的马达的加速启动头部的移动。基于头部穿过的距离启动电机的减速。

6. 发明授权

US06510014B2 Disturbance detection circuit, memory device thereof, and disturbance detection method 失效
公开(公告)号：US06510014B2
公开(公告)日：2003-01-21
申请号：US09761736
申请日：2001-01-18
申请人： Toshiyuki Kikuta , Takao Horiguchi , Tsuyoshi Arai , Yoshikatsu Fujii , Shinji Matsushita
发明人： Toshiyuki Kikuta , Takao Horiguchi , Tsuyoshi Arai , Yoshikatsu Fujii , Shinji Matsushita
IPC分类号： G11B1904
CPC分类号： G11B5/59627 , G11B5/00 , G11B5/012 , G11B19/04 , G11B33/08 , G11B33/10 , G11B33/14 , G11B2005/001
摘要： In a magnetic disk device and other memory devices, the scale and cycle of disturbance applied to each memory device are monitored to make a distinction between a harmful shock and harmless vibrations and detect the disturbance. Values at at least two points, of a waveform signal corresponding to the disturbance are captured. A) The above distinction is carried out from the size or magnitude of the inclination of a straight line defined by the two points. B) The function of capturing and storing the waveform signal corresponding to the disturbance as digital data, and outputting a slice level value for providing suitable detection sensitivity from a conversion table based on the digital data, or correcting and adjusting it and outputting the result is further set.

7. 发明授权

US06407876B1 Magnetic disk apparatus having an accelerometer for detecting acceleration in the positioning direction of the magnetic head 失效
标题翻译：具有用于检测磁头的定位方向的加速度的加速度计的磁盘装置
公开(公告)号：US06407876B1
公开(公告)日：2002-06-18
申请号：US09986298
申请日：2001-11-08
申请人： Takashi Yamaguchi , Katsuhiro Tsuneta , Katsumoto Onoyama , Tsuyoshi Arai , Yoshikatsu Fujii , Hidehiko Numasato , Yosuke Hamada , Masahito Kobayashi
发明人： Takashi Yamaguchi , Katsuhiro Tsuneta , Katsumoto Onoyama , Tsuyoshi Arai , Yoshikatsu Fujii , Hidehiko Numasato , Yosuke Hamada , Masahito Kobayashi
IPC分类号： G11B2102
CPC分类号： G11B5/553
摘要： A sector servo type magnetic disk apparatus is provided with, in addition to servo signals, a sensor such as an accelerometer for detecting a state of a magnetic head or a support for the magnetic head at a period shorter than a sampling period of the servo signals. Since an accelerometer mounted on the magnetic head or the support for the magnetic head detects an acceleration, the control performance of a servo control system can be improved, such as reduction of generation of mechanism resonance vibrations of a carriage and improvement on detection precision of a speed signal.
摘要翻译：除了伺服信号之外，扇区伺服型磁盘装置还设置有诸如用于在短于伺服信号的采样周期的时间段内检测磁头的状态或磁头的支撑的诸如加速度计的传感器。由于安装在磁头上的加速度计或磁头支撑件检测到加速度，所以可以提高伺服控制系统的控制性能，例如减少滑架的机构共振振动的产生，提高检测精度速度信号。

8. 发明授权

US4146401A Graphite material having compressibility and recovering property and method for manufacturing the same 失效
标题翻译：具有压缩性和回收性的石墨材料及其制造方法
公开(公告)号：US4146401A
公开(公告)日：1979-03-27
申请号：US709708
申请日：1976-07-29
申请人： Kazuo Yamada , Yasuo Nakano , Yoshikatsu Fujii
发明人： Kazuo Yamada , Yasuo Nakano , Yoshikatsu Fujii
IPC分类号： C01B31/00 , C04B35/536 , C04B35/52
CPC分类号： C04B35/536 , C01B31/00
摘要： Acid-treated and water-washed graphite particles are further treated with an aqueous solution of a phosphoric acid or a salt thereof, the expanded by heating to 20 to 70 times (in terms of bulk density ratio) the original graphite particles and the expanded particles are pressure-molded to obtain a graphite material having compressibility and recovering property and suitable for use in making those gaskets, packings, heat insulators, and cushion elements which are resistant to oxidation and serviceable at high temperatures.
摘要翻译：酸处理和水洗石墨颗粒进一步用磷酸或其盐的水溶液处理，通过加热至原始石墨颗粒和发泡颗粒的20至70倍（以体积密度比计）膨胀被压模以获得具有可压缩性和回收性的石墨材料，并且适用于制造耐高温氧化和使用的垫圈，填料，绝热体和缓冲元件。

9. 发明申请

US20100328813A1 DISK-ENCLOSURE COVER FOR LOW-PROFILE, HARD-DISK DRIVE 有权
标题翻译：用于低型，硬盘驱动器的磁盘封装盖
公开(公告)号：US20100328813A1
公开(公告)日：2010-12-30
申请号：US12790648
申请日：2010-05-28
申请人： Hideki OHZEKI , Kazuyuki Ishibashi , Yoshikatsu Fujii
发明人： Hideki OHZEKI , Kazuyuki Ishibashi , Yoshikatsu Fujii
IPC分类号： G11B5/596
CPC分类号： G11B5/5526
摘要： A disk drive. The disk drive includes a head, a motion mechanism, and a controller. The head is configured to access a disk configured to store data. The motion mechanism is configured to move the head. The controller is configured to determine a seek direction when an error occurred; and, the controller is configured to repeat a seek as a repeat seek to a target radial position from a direction opposite to the seek direction in an error-recovery process for the error which occurred in the seek in which the head moved to the target radial position.
摘要翻译：磁盘驱动器磁盘驱动器包括磁头，运动机构和控制器。磁头配置为访问配置为存储数据的磁盘。运动机构配置为移动头部。控制器被配置为当发生错误时确定寻道方向; 并且，所述控制器被配置为在所述头部移动到所述目标径向的所述寻找中发生的所述误差的误差恢复处理中，从与所述搜索方向相反的方向重复寻道到目标径向位置位置。

10. 发明申请

US20070217050A1 Magnetic disk drive 有权
标题翻译：磁盘驱动器
公开(公告)号：US20070217050A1
公开(公告)日：2007-09-20
申请号：US11645209
申请日：2006-12-21
申请人： Minoru Tsukada , Soichi Isono , Tomoki Oura , Yoshikatsu Fujii , Koji Takahashi
发明人： Minoru Tsukada , Soichi Isono , Tomoki Oura , Yoshikatsu Fujii , Koji Takahashi
IPC分类号： G11B15/04 , G11B21/02
CPC分类号： G11B5/59627 , G11B5/5582 , G11B19/04
摘要： Embodiments of the present invention provide a magnetic disk drive capable of controlling write/read positions by a method that takes the disturbance in the circumferential direction of a magnetic disk into consideration, thereby making it possible to improve the positioning accuracy. A magnetic disk drive in accordance with an embodiment of the present invention comprises: a magnetic recording medium on which information is written to each track thereof, the recording medium having a servo signal formed in the each track at specified intervals; a magnetic head including a read head for reading a signal from the magnetic recording medium, and a write head for writing information to the magnetic recording medium. At the time of writing/reading information by the magnetic head, a servo signal is detected from among signals read out by the read head. Information about intervals of the detection is continuously acquired on the basis of the information about the servo-signal detection intervals that have been continuously acquired. The amount of rotational fluctuations of a magnetic disk is calculated; and if the amount of rotational fluctuations exceeds the predetermined allowable range, specified processing relating to at least one of writing and reading is stopped.
摘要翻译：本发明的实施例提供一种能够通过考虑磁盘圆周方向的扰动的方法来控制写/读位置的磁盘驱动器，从而可以提高定位精度。根据本发明的实施例的磁盘驱动器包括：磁记录介质，信息被写入其每个轨道，所述记录介质具有以特定间隔形成在每个轨道中的伺服信号; 包括用于读取来自磁记录介质的信号的读头的磁头和用于将信息写入磁记录介质的写入头。在通过磁头写入/读取信息时，从读取头读出的信号中检测伺服信号。基于已经连续获取的伺服信号检测间隔的信息连续地获取关于检测间隔的信息。计算磁盘的旋转波动量; 并且如果旋转波动量超过预定的允许范围，则停止与写入和读取中的至少一个相关的指定处理。

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