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81. 发明授权

US11335374B2 Magnetic disk device and sector processing method 有权
公开(公告)号：US11335374B2
公开(公告)日：2022-05-17
申请号：US17179626
申请日：2021-02-19
申请人： Kabushiki Kaisha Toshiba , Toshiba Electronic Devices & Storage Corporation
发明人： Kazumi Fujimoto , Takao Furuhashi
IPC分类号： G11B20/18 , G11B19/04 , G11B5/596 , G11B21/10 , G11B19/14
摘要： According to one embodiment, a magnetic disk device includes a disk having a first sector including first servo data, first user data, and first correction information used to correct a data error, a head that writes data to the disk and that reads data from the disk, and a controller that changes, according to a first defect length of a defect generated in the first sector in a circumferential direction of the disk, a first sector length of the first sector in the circumferential direction.

82. 发明授权

US10748574B2 Apparatus and method for retracting the magnetic head to a home position after a predetermined time period 有权
公开(公告)号：US10748574B2
公开(公告)日：2020-08-18
申请号：US16404489
申请日：2019-05-06
申请人： CANON KABUSHIKI KAISHA
发明人： Hidetaka Tabuchi
IPC分类号： G11B19/00 , G11B19/14 , G11B19/06 , G06F3/12 , G11B21/10
摘要： An information processing apparatus includes a hard disk drive including a disk configured to store data therein and a head configured to access the disk and a control unit. The control unit causes the head to be retracted to a home position after a predetermined time period, based on an operation mode, has passed after performing control to cause the head to access the disk.

83. 发明申请

US20050083044A1 Rotational position detector and recording-reproducing unit utilizing the same 有权
标题翻译：旋转位置检测器和利用其的记录再现单元
公开(公告)号：US20050083044A1
公开(公告)日：2005-04-21
申请号：US10966739
申请日：2004-10-15
申请人： Norio Fujii , Toshiya Suzuki
发明人： Norio Fujii , Toshiya Suzuki
IPC分类号： G01B7/30 , G01B7/00 , G11B19/00 , G11B19/14 , G11B19/20 , G11B19/28 , H02K11/00 , H02P6/16
CPC分类号： G11B19/28
摘要： A rotor of a sensor-less motor has a multiplicity of magnetic poles, with one magnetic pole giving a smaller magnetic flux than other the magnetic poles. A coil is provided at a predetermined position external to the rotor. An induction signal is generated in the coil as the magnetic flux through it is changed by the rotation of the rotor. An index signal indicative of the reference rotational position of the rotor is generated based on the change in the induction signal. Thus, the reference rotational position of the disk of an information recording-reproducing unit, for example, can be detected without utilizing any Hall elements.
摘要翻译：无传感器电动机的转子具有多个磁极，一个磁极具有比其他磁极更小的磁通量。线圈设置在转子外部的预定位置处。当通过转子的旋转改变磁通量时，在线圈中产生感应信号。基于感应信号的变化产生表示转子的基准旋转位置的指标信号。因此，可以在不利用任何霍尔元件的情况下检测信息记录 - 再现单元的盘的基准旋转位置。

84. 发明授权

US6151180A Method and apparatus for detecting defects on a disk in a hard disk drive 失效
标题翻译：用于检测硬盘驱动器中的盘上的缺陷的方法和装置
公开(公告)号：US6151180A
公开(公告)日：2000-11-21
申请号：US60782
申请日：1998-04-15
申请人： Ho-Yul Bang
发明人： Ho-Yul Bang
IPC分类号： G11B25/04 , G11B5/00 , G11B19/04 , G11B19/14 , G11B20/18 , G11B27/36 , G11B5/09 , G11B5/02
CPC分类号： G11B27/36 , G11B19/04 , G11B20/1816 , G11B2220/20
摘要： A method and apparatus for determining a number of defects detected on a disk in a hard disk drive. The hard disk drive comprises an actuator arm mounted to a housing and a head mounted to the actuator arm. A spin motor is mounted to the housing and a disk is attached to the spin motor. The disk has a plurality of tracks, each of which has a plurality of sectors. Each of the sectors has a data field. The hard disk drive further comprises a defect detection circuit coupled to the head that detects a number of defects located in the data field. In one embodiment, the hard disk drive comprises a defect size detection circuit coupled to the head, that detects a corresponding size of each defect detected.
摘要翻译：一种用于确定在硬盘驱动器中的盘上检测到的缺陷的数量的方法和装置。硬盘驱动器包括安装到壳体的致动器臂和安装到致动器臂的头部。旋转电机安装到壳体上，并且盘附接到旋转电机。盘具有多个轨道，每个轨道具有多个扇区。每个扇区都有一个数据字段。硬盘驱动器还包括耦合到头的缺陷检测电路，其检测位于数据字段中的多个缺陷。在一个实施例中，硬盘驱动器包括耦合到头部的缺陷尺寸检测电路，其检测检测到的每个缺陷的对应尺寸。

85. 发明授权

US6067202A Method and apparatus for controlling spindle motor commutation switching times in a disk drive 失效
标题翻译：用于控制磁盘驱动器中主轴电机换向切换时间的方法和装置
公开(公告)号：US6067202A
公开(公告)日：2000-05-23
申请号：US769039
申请日：1996-12-18
申请人： Bryan Scott Rowan , Mantle Man-Hon Yu
发明人： Bryan Scott Rowan , Mantle Man-Hon Yu
IPC分类号： G11B19/04 , G11B19/14 , G11B19/28 , G11B15/46 , G11B5/09 , H01R39/46 , H02K23/00
CPC分类号： G11B19/28 , G11B19/04 , G11B19/14
摘要： A method and apparatus for controlling a spindle motor having at least one winding in a storage device are proposed, the storage device having at least one data storage medium rotatably supported by the spindle motor and having a plurality of tracks on each surface thereof including data regions and nondata regions, and a transducer assembly for selectively positioning a transducer over each data storage surface of the storage medium for reading and writing of information stored on the medium. The method and apparatus control rotation of the spindle motor by providing a voltage waveform to each winding at selected switching times during each rotation such that switching does not occur while the head is positioned over data. In a first embodiment, switching during nondata regions is assured by setting the switch points to coincide in time with a fixed data storage surface format. Alternatively, the data storage surface is written with servo sectors to coincide in time with preselected switch points. In a third embodiment, the time for switching is advanced or delayed until the transducer is located over a nondata region near to the nominal switching point by providing a processor executing control code and a delay circuit for delaying switching from a zero-crossing in the spindle motor control circuit. Optional enhancements are also presented.
摘要翻译：提出了一种用于控制在存储装置中具有至少一个绕组的主轴电动机的方法和装置，所述存储装置具有至少一个数据存储介质，所述至少一个数据存储介质由所述主轴电动机可旋转地支撑并且在其每个表面上具有多个轨道，和非数据区域，以及用于选择性地将换能器定位在存储介质的每个数据存储表面上以用于读取和写入存储在介质上的信息的换能器组件。该方法和装置通过在每个旋转期间以选定的切换时间向每个绕组提供电压波形来控制主轴电动机的旋转，使得在头部位于数据上方时不会发生切换。在第一实施例中，通过将切换点设置为与固定数据存储表面格式一致来确保非数据区域期间的切换。或者，数据存储表面被写入伺服扇区以便与预先选择的切换点一致。在第三实施例中，通过提供执行控制代码的处理器和用于延迟从主轴过零点切换的延迟电路，切换的时间被提前或延迟，直到换能器位于靠近标称切换点的非数据区域之上电机控制电路。还提供了可选的增强功能。

86. 发明授权

US5982728A Reading information from a disk-shaped recording medium that is rotatable at a plurality of speeds 失效
标题翻译：从可以多个速度旋转的盘形记录介质读取信息
公开(公告)号：US5982728A
公开(公告)日：1999-11-09
申请号：US898548
申请日：1997-07-22
申请人： Koujirou Okamoto , Masayoshi Nakamura , Toshihiko Mizukami
发明人： Koujirou Okamoto , Masayoshi Nakamura , Toshihiko Mizukami
IPC分类号： G11B7/0037 , G11B7/005 , G11B19/14 , G11B19/26 , G11B7/00
CPC分类号： G11B19/26 , G11B19/14 , G11B7/0037 , G11B7/005
摘要： A reproducing apparatus for disk-shaped recording medium rotationally drives the disk-shaped recording medium at a particular speed to read information from a recording track disposed circumferentially to the center of the recording surface with information recorded at a constant linear velocity. A pickup means scans the recording track and generating a first reproduction signal. A first rotational drive control means rotates the disk-shaped recording medium at a constant linear velocity based on the reproduction signal, and a second rotational drive control means rotates the disk-shaped recording medium at a constant angular velocity. A rotational drive control means selection means selects the first rotational drive control means or the second rotational drive control means based on the position of the pickup means when reproducing the disk.
摘要翻译：用于盘形记录介质的再现装置以特定速度旋转地驱动盘形记录介质，以以恒定线速度记录的信息从记录轨道中心周围设置的记录轨道读取信息。拾取装置扫描记录轨道并产生第一再现信号。第一旋转驱动控制装置基于再现信号以恒定的线速度旋转盘形记录介质，第二旋转驱动控制装置以恒定的角速度旋转盘形记录介质。旋转驱动控制装置选择装置在再现盘时基于拾取装置的位置选择第一旋转驱动控制装置或第二旋转驱动控制装置。

87. 发明授权

US5864523A Objective lens driving apparatus 失效
标题翻译：物镜驱动装置
公开(公告)号：US5864523A
公开(公告)日：1999-01-26
申请号：US745791
申请日：1996-11-08
申请人： Takashi Yoshizawa
发明人： Takashi Yoshizawa
IPC分类号： G11B7/00 , G11B7/09 , G11B7/135 , G11B19/12 , G11B19/14
CPC分类号： G11B7/13925 , G11B19/12 , G11B19/14 , G11B7/0935 , G11B7/1374 , G11B7/139 , G11B2007/0006
摘要： A lens holder is provided with objective lenses of different types. Rotating the lens holder causes one of the objective lenses to be placed in the optical path of the laser beam. Near one objective lens, there is provided a reflecting element that reflects part of the laser beam directed to the objective lens. When the objective lens is put in the optical path, the beam from the reflecting element is sensed by a sensor. From the sensing result, it is judged that a specific type of objective lens is in the optical path. Accordingly, there is provided an objective lens driving apparatus that includes at least two objective lenses with different numerical apertures according to optical information recording mediums complying with different standards, is capable of switching between the objective lenses according to the optical information recording medium to be used, and further has a simple structure capable of identifying the type of the objective lens selected by switching.
摘要翻译：透镜架设有不同类型的物镜。旋转透镜架使一个物镜放置在激光束的光路中。在一个物镜附近，设置有反射部件，该反射元件反射指向物镜的激光束的一部分。当物镜放入光路时，来自反射元件的光束由传感器感测。从感测结果可以看出，特定类型的物镜在光路中。因此，提供了一种物镜驱动装置，其包括根据符合不同标准的光学信息记录介质具有不同数值孔径的至少两个物镜，能够根据要使用的光学信息记录介质在物镜之间切换并且还具有能够识别通过切换选择的物镜的类型的简单结构。

88. 发明授权

US5715109A Optical disk replay device which varies a delay and frequency of a reproduced signal based on a position of an optical head 失效
标题翻译：光盘重放装置，其基于光学头的位置改变再现信号的延迟和频率
公开(公告)号：US5715109A
公开(公告)日：1998-02-03
申请号：US723245
申请日：1996-09-30
申请人： Shinichi Tanaka , Naoto Inaba
发明人： Shinichi Tanaka , Naoto Inaba
IPC分类号： G11B20/10 , G11B7/00 , G11B7/005 , G11B19/14 , G11B20/12 , G11B5/035
CPC分类号： G11B20/10009 , G11B20/1258 , G11B7/005
摘要： An optical disk replay device for replaying information from an optical disk recorded in a modified constant angular velocity (MCAV) format. The optical disk replay device has an optical head to output a reproduced signal based on the information stored in the optical disk. The signal from the optical head is passed through a series of delay circuits which output delayed signals based on the reproduced signal. Thereafter, a calculating circuit sums, or subtracts, the delayed signals and outputs an intermediate reproduced signal to a band limiting circuit which attenuates the frequency of the intermediate reproduced signal. A control circuit changes the amount of delay imparted by the delay circuits and to adjust the frequency range of the band limiting circuit.
摘要翻译：一种光盘重放装置，用于以以修改的恒定角速度（MCAV）格式记录的光盘重放信息。光盘重放装置具有光头，用于基于存储在光盘中的信息输出再现信号。来自光头的信号通过一系列基于再现信号输出延迟信号的延迟电路。此后，计算电路对延迟的信号进行加法或减法，并将中间再现信号输出到限制中频再生信号的频率的频带限制电路。控制电路改变由延迟电路施加的延迟量并调节频带限制电路的频率范围。

89. 发明授权

US5495455A Magneto-optical disk recording and reading apparatus and method wherein the recording head is controlled in the radial direction of the disk to a desired position 失效
标题翻译：磁光盘记录和读取装置和方法，其中将记录头沿盘的径向方向控制到期望的位置
公开(公告)号：US5495455A
公开(公告)日：1996-02-27
申请号：US50657
申请日：1993-04-22
申请人： Tetsuji Kawashima , Tetsu Watanabe
发明人： Tetsuji Kawashima , Tetsu Watanabe
IPC分类号： G11B7/085 , G11B11/105 , G11B19/14 , G11B11/00 , G11B17/22
CPC分类号： G11B19/14 , G11B11/10508 , G11B11/10573 , G11B11/10595 , G11B7/08517
摘要： A magneto-optical disc recording apparatus includes a magnetic head, an optical head, a position detector and a controller. The magnetic head supplies a vertical magnetic field corresponding to recording data to a magneto-optical disc. The optical head emits a light beam to the magneto-optical disc through a substrate of the magneto-optical disc. The magneto-optical disc is arranged between the magnetic head and the optical head. The optical head has an actuator for moving an objective lens in a tracking direction. The position detector detects the displacement of the actuator. The controller controls a recording operation of the magnetic head and the optical head. The recording operation is started when a result of detection by the position detector reaches a predetermined value.
摘要翻译：磁光盘记录装置包括磁头，光头，位置检测器和控制器。磁头将对应于记录数据的垂直磁场提供给磁光盘。光头通过磁 - 光盘的基片将光束发射到磁 - 光盘。磁光盘布置在磁头和光头之间。光学头具有用于在跟踪方向上移动物镜的致动器。位置检测器检测致动器的位移。控制器控制磁头和光学头的记录操作。当位置检测器的检测结果达到预定值时，开始记录操作。

90. 发明授权

US5303107A System for holding a track counter active despite power suspension in rotating disk data storage apparatus 失效
标题翻译：用于保持轨道计数器活动的系统，尽管在旋转盘数据存储装置中停电
公开(公告)号：US5303107A
公开(公告)日：1994-04-12
申请号：US869237
申请日：1992-04-15
申请人： Tohru Miura , Hiroshi Tsuyuguchi , Fumio Nagase , Miya Enami
发明人： Tohru Miura , Hiroshi Tsuyuguchi , Fumio Nagase , Miya Enami
IPC分类号： G11B5/09 , G11B19/00 , G11B19/02 , G11B19/04 , G11B19/14 , G11B20/10 , G11B20/00
CPC分类号： G11B19/14 , G11B19/00 , G11B19/02 , G11B19/04 , G11B20/10009
摘要： A floppy disk drive is disclosed which is for use with a host system capable of connecting its own power supply to the disk drive when its operation is needed, and disconnecting the power supply from the disk drive when its operation is not needed. The disk drive includes a stepper motor for moving a data transducer from track to track on a rotating magnetic disk, and a track counter for ascertaining the radial position of the transducer on the disk by counting the stepping pulses fed from the host system to a stepper motor control circuit. In order to maintain the count of the track counter despite power suspension, the track counter is connected to a supply terminal of the disk drive via a reverse blocking diode, and a capacitor is connected between the diode and ground. The track counter is therefore fed from the capacitor when the disk drive is disconnected from the power supply of the host system. Preferably, the count of the track counter when the disk drive is disconnected from the power supply may be temporarily stored on an electrically erasable, programmable read only memory, and the stored count may be returned to and preset on the track counter when the disk drive is subsequently powered on.
摘要翻译：公开了一种软盘驱动器，其用于在需要其操作时能够将其自身的电源连接到磁盘驱动器的主机系统，以及当不需要其操作时将电源从磁盘驱动器断开。磁盘驱动器包括用于将数据传感器从轨道到轨道上移动到旋转磁盘上的步进电机，以及用于通过将从主机系统馈送到步进电机的步进脉冲计数来确定换能器在盘上的径向位置的轨道计数器电机控制电路。为了保持轨道计数器的计数，尽管电源暂停，轨道计数器通过反向阻塞二极管连接到磁盘驱动器的电源端子，电容器连接在二极管和地之间。因此，当磁盘驱动器与主机系统的电源断开连接时，轨道计数器从电容器馈送。优选地，当磁盘驱动器与电源断开时，轨道计数器的计数可以临时存储在电可擦除的可编程只读存储器上，并且当盘驱动器可以将存储的计数返回到并预设在轨道计数器上随后打开电源。

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