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21. 发明授权

US07525747B2 Data storage device, data storage control circuit, and control method for magnetic disk drive 失效
标题翻译：数据存储装置，数据存储控制电路及磁盘驱动器的控制方法
公开(公告)号：US07525747B2
公开(公告)日：2009-04-28
申请号：US11341261
申请日：2006-01-26
申请人： Fuminori Sai , Naoyuki Minami , Hiroshi Kawanobe , Hidenobu Hanami
发明人： Fuminori Sai , Naoyuki Minami , Hiroshi Kawanobe , Hidenobu Hanami
IPC分类号： G11B20/10
CPC分类号： G11B20/10 , G11B20/1217 , G11B20/18 , G11B2020/1232 , G11B2020/1287 , G11B2220/2516
摘要： Embodiments of the invention prevent erroneous writing/readout onto/from magnetic disks or other recording disks, even when data transfer between a controller such as an HDC, and a channel such as an R/W channel, and the read/write operation performed by the channel do not match each other in timing. In one embodiment, an HDC/MPU outputs to an R/W channel a starting instruction for data transfer to/from a head, and data that indicates data length of data to be transferred. In response to the data transfer starting instruction from the HDC/MPU, the R/W channel starts transferring, to/from the head, recorded data of the data length notified from the HDC/MPU.
摘要翻译：本发明的实施例即使在诸如HDC的控制器和诸如R / W信道的信道之间的数据传输和由R / W信道的信道进行的读/写操作之间也可以防止对磁盘或其他记录盘的错误写入/读出频道在时间上不匹配。在一个实施例中，HDC / MPU向R / W通道输出用于从头部进行数据传送的起始指令，以及指示要传送的数据的数据长度的数据。响应于来自HDC / MPU的数据传输开始指令，R / W通道开始向/从头传送从HDC / MPU通知的数据长度的记录数据。

22. 发明申请

US20080144207A1 Storing AD sampled data of read/write channel into ECC SRAM 有权
标题翻译：将读/写通道的AD采样数据存储到ECC SRAM中
公开(公告)号：US20080144207A1
公开(公告)日：2008-06-19
申请号：US11638969
申请日：2006-12-13
申请人： Fuminori Sai , Yasuhiro Takase , Christopher Taylor
发明人： Fuminori Sai , Yasuhiro Takase , Christopher Taylor
IPC分类号： G11B15/18
CPC分类号： G11B20/10527 , G11B20/10009 , G11B20/10037 , G11B20/1833 , G11B2020/10759 , G11B2020/183 , G11B2220/2516
摘要： An embodiment in accordance with the present invention enables storing in a memory, multi-bit data corresponding to analog signals read from a medium before being converted to single-bit data as recorded data. In an embodiment of the present invention, an AD converter is configured to convert analog signals from a magnetic disk to multi-bit data. A buffer circuit holds successively multi-bit data transferred from the AD converter toward a Viterbi decoder, and outputs the held plural multi-bit data in parallel. A SRAM for ECC is used for storing multi-bit data transferred from the buffer circuit.
摘要翻译：根据本发明的一个实施例，能够在存储器中存储对应于从被转换为单位数据之前从介质读取的模拟信号的多位数据作为记录数据。在本发明的实施例中，AD转换器被配置为将来自磁盘的模拟信号转换成多位数据。缓冲电路将从AD转换器传送的连续的多位数据保持为维特比解码器，并且并行输出保持的多位数据。用于ECC的SRAM用于存储从缓冲电路传送的多位数据。

23. 发明申请

US20060171053A1 Data storage device, data storage control circuit, and control method for magnetic disk drive 失效
公开(公告)号：US20060171053A1
公开(公告)日：2006-08-03
申请号：US11341261
申请日：2006-01-26
申请人： Fuminori Sai , Naoyuki Minami , Hiroshi Kawanobe , Hidenobu Hanami
发明人： Fuminori Sai , Naoyuki Minami , Hiroshi Kawanobe , Hidenobu Hanami
IPC分类号： G11B5/02 , G11B5/09
CPC分类号： G11B20/10 , G11B20/1217 , G11B20/18 , G11B2020/1232 , G11B2020/1287 , G11B2220/2516
摘要： Embodiments of the invention prevent erroneous writing/readout onto/from magnetic disks or other recording disks, even when data transfer between a controller such as an HDC, and a channel such as an R/W channel, and the read/write operation performed by the channel do not match each other in timing. In one embodiment, an HDC/MPU outputs to an R/W channel a starting instruction for data transfer to/from a head, and data that indicates data length of data to be transferred. In response to the data transfer starting instruction from the HDC/MPU, the R/W channel starts transferring, to/from the head, recorded data of the data length notified from the HDC/MPU.

24. 发明授权

US06981205B2 Data storage apparatus, read data processor, and read data processing method 有权
标题翻译：数据存储装置，读数据处理器和读数据处理方法
公开(公告)号：US06981205B2
公开(公告)日：2005-12-27
申请号：US10279305
申请日：2002-10-23
申请人： Yukio Fukushima , Katsuhiko Katoh , Shunsuke Kobayashi , Takashi Kuroda , Yuzo Nakagawa , Fuminori Sai , Emi Shimono , Tetsuya Tamura , Tetsuo Ueda
发明人： Yukio Fukushima , Katsuhiko Katoh , Shunsuke Kobayashi , Takashi Kuroda , Yuzo Nakagawa , Fuminori Sai , Emi Shimono , Tetsuya Tamura , Tetsuo Ueda
IPC分类号： G06F11/08 , G06F3/06 , G11B20/10 , G11B20/18 , H03M13/43
CPC分类号： G11B20/1809
摘要： To improve the probability of error correction, thereby generating correct read data. Data is read from the same sector by a number of times and a majority decision is done in the same address, thereby the most frequently read value is regarded as the true data value in the address. For example, for an address 00, “00” is handled as a true data value.
摘要翻译：为了提高纠错的概率，从而产生正确的读取数据。数据从同一扇区读取多次，多数决定在相同的地址中完成，从而将最常读取的值视为地址中的真实数据值。例如，对于地址00，将“00”作为真实数据值处理。

25. 发明授权

US07646561B2 Method of writing pattern in disk, method of following track on disk, and apparatus for writing pattern in disk 失效
标题翻译：在磁盘中写入模式的方法，在磁盘上跟踪轨迹的方法，以及在盘中写入模式的装置
公开(公告)号：US07646561B2
公开(公告)日：2010-01-12
申请号：US11895322
申请日：2007-08-23
申请人： Kohji Takasaki , Fuminori Sai , Kei Yasuna , Tomoyuki Oyama , Satoshi Yamamoto
发明人： Kohji Takasaki , Fuminori Sai , Kei Yasuna , Tomoyuki Oyama , Satoshi Yamamoto
IPC分类号： G11B5/596
CPC分类号： G11B5/59688 , G11B5/59666
摘要： Embodiments of the present invention efficiently perform servo correction for prevention of propagation of a position error in a radial direction in self servo write (SSW). According to one embodiment, in SSW, a target position of a reference track TO in writing a servo write track TN is corrected. The target position is represented as a target value of a position signal calculated from a signal read by a read element. A signal indicating a deviation (a position error) from the target position (the target value) is referred to as PES. The SSW in this example performs correction of target positions in respective tracks using an impulse response of a servo system. Consequently, it is possible to efficiently and effectively prevent the propagation of position error in the SSW.
摘要翻译：本发明的实施例有效地进行伺服校正，以防止自伺服写入（SSW）中径向位置误差的传播。根据一个实施例，在SSW中，校正写入伺服写磁道TN的参考磁道TO的目标位置。目标位置被表示为根据由读取元件读取的信号计算出的位置信号的目标值。指示与目标位置（目标值）的偏差（位置误差）的信号被称为PES。该示例中的SSW使用伺服系统的脉冲响应来执行各轨道中的目标位置的校正。因此，可有效且有效地防止SSW中的位置误差的传播。

26. 发明申请

US20090009904A1 Method for forming servo pattern and magnetic disk drive 审中-公开
标题翻译：伺服模式和磁盘驱动器的形成方法
公开(公告)号：US20090009904A1
公开(公告)日：2009-01-08
申请号：US12215260
申请日：2008-06-25
申请人： Kei Yasuna , Kohji Takasaki , Fuminori Sai , Makoto Takase , Tomoyuki Oyama
发明人： Kei Yasuna , Kohji Takasaki , Fuminori Sai , Makoto Takase , Tomoyuki Oyama
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B5/59666
摘要： Embodiments of the present invention provide a method of forming an initial servo-pattern for self servowrite, insusceptible to constraints of an output resolution of a driver circuit for driving an actuator, and a dynamic range. According to one embodiment, a cluster pattern made up of pattern blocks, each including a burst pattern, is written by use of a write element by pressing a head-support mechanism to a crash-stop, and a pattern block is newly written with a read element in states of being positioned at an inner peripheral side edge of the cluster pattern, an outer peripheral side edge thereof, and the center of two burst patterns included in the cluster pattern, respectively, thereby increasing a width of the cluster patterns in stages, so that an initial servo pattern for use in a propagation action is formed.
摘要翻译：本发明的实施例提供了一种形成用于自伺服驱动的初始伺服模式的方法，其不受用于驱动致动器的驱动器电路的输出分辨率的约束和动态范围的影响。根据一个实施例，通过将头部支撑机构按压到紧急停止，使用写入元件来写入由图案块构成的每个包括突发图案的簇图案，并且新的图案块用读取元件分别位于簇图案的内周侧边缘，其外周侧边缘和包括在簇图案中的两个突发图案的中心，从而分级地增加簇图案的宽度，从而形成用于传播动作的初始伺服模式。

27. 发明授权

US07446967B2 Method of measuring head characteristics of a data storage device, and data storage device 失效
标题翻译：测量数据存储装置的头部特性的方法和数据存储装置
公开(公告)号：US07446967B2
公开(公告)日：2008-11-04
申请号：US11222913
申请日：2005-09-08
申请人： Minoru Hashimoto , Kenji Okada , Fuminori Sai , Chikako Sasaki , Satoshi Yamamoto
发明人： Minoru Hashimoto , Kenji Okada , Fuminori Sai , Chikako Sasaki , Satoshi Yamamoto
IPC分类号： G11B21/02
CPC分类号： G11B27/36 , G11B5/3166 , G11B5/455 , G11B5/59633 , G11B5/59666 , G11B2220/2516
摘要： Embodiments of the invention relate to measuring characteristics of a head with an actuator put in a state of being pushed against a crush stop. In one embodiment, with a head placed on an innermost ID side or with the current of a VCM sustained at a magnitude I_mid, a burst pattern is written onto a recording disk. At this stage, the gain of a VGA is equal to its maximum value Gmax. Then, while the current of the VCM is being changed gradually, the gain of the VCA is measured. As the current of the VCM becomes equal to a magnitude I_center, a read element of the head is positioned right above the burst pattern. At that time, the gain of a VGA is equal to its minimum value Gmin. As the read element is further moved to the OD side, the gain of the VGA again becomes equal to the maximum value Gmax. A read/write offset of the head is identified by the magnitudes I_center and I_mid.
摘要翻译：本发明的实施例涉及测量具有致动器的头部的特性，所述致动器处于被压靠在挤压止动件上的状态。在一个实施例中，当头部放置在最内侧的ID侧或者VCM的电流维持在幅度I_mid时，突发图案被写入到记录盘上。在这个阶段，VGA的增益等于其最大值Gmax。然后，当VCM的电流逐渐变化时，测量VCA的增益。当VCM的电流变得等于幅度I_center时，头部的读取元件位于突发图案的正上方。此时VGA的增益等于其最小值Gmin。当读取元件进一步移动到OD侧时，VGA的增益再次等于最大值Gmax。磁头的读/写偏移量由I_center和I_mid的大小识别。

28. 发明申请

US20080068741A1 Method of writing pattern in disk, method of following track on disk, and apparatus for writing pattern in disk 失效
标题翻译：在磁盘中写入模式的方法，在磁盘上跟踪轨迹的方法，以及在盘中写入模式的装置
公开(公告)号：US20080068741A1
公开(公告)日：2008-03-20
申请号：US11895322
申请日：2007-08-23
申请人： Kohji Takasaki , Fuminori Sai , Kei Yasuna , Tomoyuki Oyama , Satoshi Yamamoto
发明人： Kohji Takasaki , Fuminori Sai , Kei Yasuna , Tomoyuki Oyama , Satoshi Yamamoto
IPC分类号： G11B5/596
CPC分类号： G11B5/59688 , G11B5/59666
摘要： Embodiments of the present invention efficiently perform servo correction for prevention of propagation of a position error in a radial direction in self servo write (SSW). According to one embodiment, in SSW, a target position of a reference track TO in writing a servo write track TN is corrected. The target position is represented as a target value of a position signal calculated from a signal read by a read element. A signal indicating a deviation (a position error) from the target position (the target value) is referred to as PES. The SSW in this example performs correction of target positions in respective tracks using an impulse response of a servo system. Consequently, it is possible to efficiently and effectively prevent the propagation of position error in the SSW.
摘要翻译：本发明的实施例有效地进行伺服校正，以防止自伺服写入（SSW）中径向位置误差的传播。根据一个实施例，在SSW中，校正写入伺服写磁道TN的参考磁道TO的目标位置。目标位置被表示为根据由读取元件读取的信号计算出的位置信号的目标值。指示与目标位置（目标值）的偏差（位置误差）的信号被称为PES。该示例中的SSW使用伺服系统的脉冲响应来执行各轨道中的目标位置的校正。因此，可有效且有效地防止SSW中的位置误差的传播。

29. 发明申请

US20060056097A1 Method of measuring head characteristics of a data storage device, and data storage device 失效
标题翻译：测量数据存储装置的头部特性的方法和数据存储装置
公开(公告)号：US20060056097A1
公开(公告)日：2006-03-16
申请号：US11222913
申请日：2005-09-08
申请人： Minoru Hashimoto , Kenji Okada , Fuminori Sai , Chikako Sasaki , Satoshi Yamamoto
发明人： Minoru Hashimoto , Kenji Okada , Fuminori Sai , Chikako Sasaki , Satoshi Yamamoto
IPC分类号： G11B21/02 , G11B5/09 , G11B27/36
CPC分类号： G11B27/36 , G11B5/3166 , G11B5/455 , G11B5/59633 , G11B5/59666 , G11B2220/2516
摘要： Embodiments of the invention relate to measuring characteristics of a head with an actuator put in a state of being pushed against a crush stop. In one embodiment, with a head placed on an innermost ID side or with the current of a VCM sustained at a magnitude I_mid, a burst pattern is written onto a recording disk. At this stage, the gain of a VGA is equal to its maximum value Gmax. Then, while the current of the VCM is being changed gradually, the gain of the VCA is measured. As the current of the VCM becomes equal to a magnitude I_center, a read element of the head is positioned right above the burst pattern. At that time, the gain of a VGA is equal to its minimum value Gmin. As the read element is further moved to the OD side, the gain of the VGA again becomes equal to the maximum value Gmax. A read/write offset of the head is identified by the magnitudes I_center and I_mid.
摘要翻译：本发明的实施例涉及测量具有致动器的头部的特性，所述致动器处于被压靠在挤压止动件上的状态。在一个实施例中，当头部放置在最内侧的ID侧或者VCM的电流维持在幅度I_mid时，突发图案被写入到记录盘上。在这个阶段，VGA的增益等于其最大值Gmax。然后，当VCM的电流逐渐变化时，测量VCA的增益。当VCM的电流变得等于幅度I_center时，头部的读取元件位于突发图案的正上方。此时VGA的增益等于其最小值Gmin。当读取元件进一步移动到OD侧时，VGA的增益再次等于最大值Gmax。磁头的读/写偏移量由I_center和I_mid的大小识别。

30. 发明授权

US5638203A Liquid crystal electrooptical device 失效
标题翻译：液晶电光装置
公开(公告)号：US5638203A
公开(公告)日：1997-06-10
申请号：US706484
申请日：1996-09-04
申请人： Masaki Hasegawa , Fuminori Sai , Fumiaki Yamada
发明人： Masaki Hasegawa , Fuminori Sai , Fumiaki Yamada
IPC分类号： G02F1/1337 , G02F1/1343 , G02F1/141 , G02F1/29 , G02F1/13
CPC分类号： G02F1/134309 , G02F1/29 , G02F1/141 , G02F2001/294
摘要： The present invention relates to obtain an electrooptical device having a high response speed by using a spontaneously polarized ferroelectric liquid crystal. Spontaneously polarized ferroelectric liquid crystal in the smectic-A state is sealed into a proper transparent case. An electric field is applied perpendicularly to a light path direction so as to change the orientation directions of liquid crystal molecules, thereby changing the refractive index distribution. A liquid crystal electrooptical device having both deflection and focusing functions is provided by adjusting the shape of the electrodes while maintaining the polarization state of an input light beam.
摘要翻译：本发明涉及通过使用自发极化的铁电液晶获得具有高响应速度的电光装置。在近晶A状态下的自发极化铁电液晶被密封成适当的透明壳体。垂直于光路方向施加电场，以改变液晶分子的取向方向，从而改变折射率分布。通过在保持输入光束的偏振状态的同时调节电极的形状来提供具有偏转和聚焦功能的液晶电光装置。

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