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1. 发明授权

US06441982B1 Dummy write method for a magnetic head and drive unit for carrying out the method 失效
标题翻译：用于执行该方法的磁头和驱动单元的虚拟写入方法
公开(公告)号：US06441982B1
公开(公告)日：2002-08-27
申请号：US09448234
申请日：1999-11-24
申请人： Yukio Fukushima , Tetsuo Ueda , Hideo Asano
发明人： Yukio Fukushima , Tetsuo Ueda , Hideo Asano
IPC分类号： G11B509
CPC分类号： G11B5/00 , G11B5/012 , G11B2005/0008 , G11B2005/0013 , G11B2005/0021
摘要： A drive unit which recovers from write instability by heating the magnetic head prior to performing a dummy write operation is described. In the preferred embodiments, once write instability has been detected the head may be heated by friction with the rotating disk or by an external heater. In the friction method the head is moved to a safe area of the disk such as a textured landing zone while the disk rotation is continued. In drives using unload ramps, a heater is preferably placed at the the ramp so that the head can be heated while parked on the ramp. In each of these embodiments dummy write operations are performed while the head is in a thermally excited state due to the heating. The combination of heating and the dummy write operation aids in restoring write stability.
摘要翻译：描述通过在执行虚拟写入操作之前加热磁头而从写入不稳定性恢复的驱动单元。在优选实施例中，一旦检测到写入不稳定性，头部可以通过与旋转盘的摩擦或外部加热器的摩擦来加热。在摩擦方法中，当盘旋转持续时，头移动到盘的安全区域，例如纹理着陆区。在使用卸载斜坡的驱动器中，优选地将加热器放置在斜坡处，使得头部可以在停放在斜坡上时被加热。在这些实施例的每一个中，由于加热，头部处于热激发状态时执行伪写入操作。加热和虚拟写入操作的组合有助于恢复写入稳定性。

2. 发明授权

US06476997B2 Disk device, track positioning method and method for generating a position error signal 失效
标题翻译：磁盘设备，轨道定位方法和产生位置误差信号的方法
公开(公告)号：US06476997B2
公开(公告)日：2002-11-05
申请号：US09120906
申请日：1998-07-22
申请人： Yukio Fukushima , Tetsuo Ueda , Toshio Kakihara , Hideo Asano
发明人： Yukio Fukushima , Tetsuo Ueda , Toshio Kakihara , Hideo Asano
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： A disk device, track positioning method, and method for generating a position error signal in which the occurrence of a wrong correction operation can be prevented by creating an appropriate PES without using a burst pattern having a defect, and reassign sectors can be decreased by decreasing defective sectors thereby to reduce the performance degradation is disclosed. In the disk device and track positioning method, the defect of a burst pattern read out from a disk is detected, and if a defect is detected in the burst pattern, a data value corresponding to the sum data of the burst pattern pair having the defect detected is obtained by measuring the maximum amplitude value of the burst pattern pairing with the burst pattern having the defect detected, and a PES is created according to the amplitude of the burst pattern having the defect detected and the maximum amplitude value.
摘要翻译：一种磁盘装置，轨道定位方法以及用于产生位置误差信号的方法，其中可以通过在不使用具有缺陷的脉冲串模式的情况下创建适当的PES来防止出现错误的校正操作，并且可以通过减少重新分配扇区来减少重新分配扇区缺陷扇区，从而降低性能下降。在盘装置和轨迹定位方法中，检测从盘读出的脉冲串模式的缺陷，并且如果在脉冲串模式中检测到缺陷，则与具有缺陷的脉冲串模式对的和数据相对应的数据值通过测量与检测到缺陷的脉冲串模式匹配的脉冲串模式的最大幅度值，并且根据具有检测到的缺陷的脉冲串模式的幅度和最大振幅值来创建PES来获得检测到的。

3. 发明授权

US06556369B1 Disk drive device with a high frequency access method and apparatus 有权
标题翻译：具有高频率存取方式和装置的磁盘驱动装置
公开(公告)号：US06556369B1
公开(公告)日：2003-04-29
申请号：US09448227
申请日：1999-11-24
申请人： Atsushi Kanamaru , Hideo Asano , Tetsuo Ueda
发明人： Atsushi Kanamaru , Hideo Asano , Tetsuo Ueda
IPC分类号： G11B509
CPC分类号： G11B20/1883 , G11B5/012 , G11B5/5547 , G11B5/59633 , G11B5/82 , G11B27/329 , G11B2020/10916 , G11B2220/20
摘要： A disk drive device comprising a disk-shaped recording medium, having a recording surface on which a plurality of tracks having a predetermined width in a radial direction are defined, said recording surface including a first area wherein a plurality of recording tracks and a plurality of non-recording tracks are located so as to form an alternating pattern along the radial direction of the recording surface. The disk drive device may further comprise: a transducer to record information on the disk-shaped recording medium; a position error detector element to detect position error relative to a target track to be recorded on; an actuator to move the transducer to the target track according to the position error; and an end-of-seek detector, wherein when the transducer is moved to a target track inside the predetermined area the end-of-seek detector determines an end of seek based on whether the position error is less than a first threshold, and when the transducer is moved to a target track outside the predetermined area, the end-of-seek detector determines an end of seek based on whether the position error is less than a second threshold, wherein the second threshold is less than the first threshold.
摘要翻译：一种盘驱动装置，其特征在于，具有盘状记录媒体，具有记录面，在该记录面上形成有沿径向具有预定宽度的多个轨迹，所述记录面包括：第一区域，其中多个记录道和多个记录道非记录磁道位于记录表面的径向方向上形成交替图案。磁盘驱动器装置还可以包括：用于在盘状记录介质上记录信息的换能器; 用于检测相对于要记录的目标轨迹的位置误差的位置误差检测器元件; 根据位置误差将传感器移动到目标轨道的致动器; 以及搜索结束检测器，其中当所述换能器被移动到所述预定区域内的目标轨迹时，所述寻求终点检测器基于所述位置误差是否小于第一阈值来确定搜索结束，以及何时换能器被移动到预定区域外的目标轨道，寻求终点探测器基于位置误差是否小于第二阈值来确定搜索结束，其中第二阈值小于第一阈值。

4. 发明授权

US06622206B1 Method for controlling write cache transfer and disk unit 失效
标题翻译：控制写缓存传输和磁盘单元的方法
公开(公告)号：US06622206B1
公开(公告)日：2003-09-16
申请号：US09591020
申请日：2000-06-09
申请人： Atsushi Kanamaru , Hideo Asano , Tetsuo Ueda
发明人： Atsushi Kanamaru , Hideo Asano , Tetsuo Ueda
IPC分类号： G06F1200
CPC分类号： G06F3/0613 , G06F3/0656 , G06F3/0676 , G06F12/0866
摘要： A method and system are disclosed to prevent significant degradation of a data transfer rate in write cache transfer, thereby keeping the minimum data transfer rate high. The initial value Ti of the virtual buffer full capacity T(tx) is set to F/N (where F is a data capacity of the buffer, and N>1) and it is determined if the amount of write cached data S(tx) reaches the virtual buffer full capacity T(tx) so that write cache transfer is enabled during an S(tx)
摘要翻译：公开了一种方法和系统，以防止写入高速缓存传送中的数据传输速率的显着劣化，从而保持最小的数据传输速率。虚拟缓冲器满容量T（tx）的初始值Ti被设置为F / N（其中F是缓冲器的数据容量，N> 1），并且确定写入缓存数据量S（tx ）达到虚拟缓冲器满容量T（tx），使得在S（tx）

5. 发明授权

US06456451B1 Method and apparatus for disk drive seek control 失效
公开(公告)号：US06456451B1
公开(公告)日：2002-09-24
申请号：US09220419
申请日：1998-12-24
申请人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
发明人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
IPC分类号： G11B5596
CPC分类号： G11B5/5547
摘要： A disk drive seek control system device to reduce track pitch. When data is recorded, an offset value is added to the position of a read head element along the width of a track corresponding to an offset &Dgr;w between the read head element and a write head element. The value of the offset depends on the yaw angle &thgr; of the head. When data is read, the position of the read head element is chosen to be either the position of the write head element during write operations, or the midpoint between the position of the write head element and the read head element during write operations, or the center of a track.

6. 发明授权

US06597530B2 Method and apparatus for disk drive seek control 失效
公开(公告)号：US06597530B2
公开(公告)日：2003-07-22
申请号：US09935272
申请日：2001-08-22
申请人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
发明人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
IPC分类号： G11B5596
CPC分类号： G11B5/5547
摘要： A disk drive seek control system device to reduce track pitch. When data is recorded, an offset value is added to the position of a read head element along the width of a track corresponding to an offset &Dgr;w between the read head element and a write head element. The value of the offset depends on the yaw angle &thgr; of the head. When data is read, the position of the read head element is chosen to be either the position of the write head element during write operations, or the midpoint between the position of the write head element and the read head element during write operations, or the center of a track.

7. 发明授权

US06574065B1 Method and apparatus for adaptive resonance mode cancellation servo in a rotating storage system 失效
标题翻译：旋转存储系统中自适应共振模式消除伺服的方法和装置
公开(公告)号：US06574065B1
公开(公告)日：2003-06-03
申请号：US09311307
申请日：1999-05-14
申请人： Sri M. Sri-Jayantha , Arun Sharma , Hien Dang , Tetsuo Ueda , Kenji Okada , Hideo Asano , Tatsuya Endoh , Masayuki Takeuchi
发明人： Sri M. Sri-Jayantha , Arun Sharma , Hien Dang , Tetsuo Ueda , Kenji Okada , Hideo Asano , Tatsuya Endoh , Masayuki Takeuchi
IPC分类号： G11B2102
CPC分类号： G11B21/083 , G11B5/59605
摘要： A method and apparatus for adaptive resonance cancellation in a rotating storage system, includes designing a set of digitally selectable optimum resonance cancellation filters, generating a series of excitation signals for injection into the filters, generating a characteristic resonance frequency based on the excitation signals, and computing an address pointer corresponding to the resonance frequency, to select an optimum resonance cancellation filter.
摘要翻译：一种用于旋转存储系统中自适应共振消除的方法和装置，包括设计一组数字可选择的最佳共振消除滤波器，产生一系列用于注入滤波器的激励信号，基于激励信号产生特征谐振频率，以及计算对应于谐振频率的地址指针，以选择最佳谐振消除滤波器。

8. 发明申请

US20100272971A1 OPTICAL FILM AND IMAGE DISPLAY APPARATUS HAVING THE SAME 审中-公开
标题翻译：具有相同的光学膜和图像显示装置
公开(公告)号：US20100272971A1
公开(公告)日：2010-10-28
申请号：US12810462
申请日：2008-12-26
申请人： Takashi Miyai , Yoshiyuki Shiotani , Hideo Asano , Hirokazu Niwa , Susumu Hirama , Satoshi Ishida , Masanori Takaiwa
发明人： Takashi Miyai , Yoshiyuki Shiotani , Hideo Asano , Hirokazu Niwa , Susumu Hirama , Satoshi Ishida , Masanori Takaiwa
IPC分类号： C08F226/06 , C08F226/08 , C08F226/12 , C08F26/00 , C08F228/06 , C08L39/04 , C08L45/00 , C08L1/02 , C08L33/10 , B32B7/02
CPC分类号： G02F1/13363 , C08L23/18 , C08L33/08 , C08L33/24 , C08L39/04 , G02B5/3083 , G02F2001/133637 , Y10T428/24942 , C08L2666/04
摘要： A novel optical film is provided that exhibits a wavelength dispersion (a reverse wavelength dispersion) such that the birefringence of the film decreases as the wavelength becomes shorter, at least in the visible light range. The optical film includes a layer formed of a resin (A) having a heteroaromatic group or a molecular structure represented by the following formula (1), (2) or (3): where in the formula (1), n is a natural number in the range of 1 to 4, and R1 and R2 each independently represent a hydrogen atom or a methyl group. The optical film exhibits a wavelength dispersion such that the birefringence of the film decreases as the wavelength becomes shorter, at least in the visible light range.
摘要翻译：提供了一种新型的光学膜，其表现出波长色散（反向波长色散），使得膜的双折射至少在可见光范围内随波长变短而降低。光学膜包括由具有杂芳基的树脂（A）或由下式（1），（2）或（3）表示的分子结构形成的层：其中在式（1）中，n是天然的数为1〜4，R1和R2各自独立地表示氢原子或甲基。至少在可见光范围内，光学膜表现出波长分散，使得膜的双折射率随波长变短而降低。

9. 发明申请

US20090135483A1 RETARDATION FILM 有权
标题翻译：延迟膜
公开(公告)号：US20090135483A1
公开(公告)日：2009-05-28
申请号：US12280789
申请日：2007-02-27
申请人： Hideo Asano , Akio Naka , Hirokazu Niwa , Tomoyuki Kuwamoto , Hiroyasu Watabe , Yoshiyuki Shiotani
发明人： Hideo Asano , Akio Naka , Hirokazu Niwa , Tomoyuki Kuwamoto , Hiroyasu Watabe , Yoshiyuki Shiotani
IPC分类号： G02B1/08
CPC分类号： G02B5/3083 , C08F220/26 , C08J5/18 , C08J2333/06
摘要： The invention provides a retardation film, composed primarily of an acrylic polymer, with transparency, heat resistance, and large retardation. The retardation film of the present invention is composed primarily of an acrylic polymer. The film has an in-plane retardation of from 130 nm to 500 nm, inclusive, per 100 μm thickness at a wavelength of 589 nm. The film has a total light transmittance of not less than 85%. The retardation film has a glass transition temperature of preferably from 110° C. to 200° C., inclusive. The acrylic polymer, which is the primary component, preferably has a lactone ring structure.
摘要翻译：本发明提供一种延迟膜，其主要由丙烯酸类聚合物组成，具有透明性，耐热性和较大延迟。本发明的延迟膜主要由丙烯酸类聚合物构成。该膜在589nm的波长下，每100μm厚度具有从130nm到500nm（包括端面）的面内延迟。该膜具有不小于85％的总透光率。延迟膜的玻璃化转变温度优选为110℃〜200℃。作为主要成分的丙烯酸系聚合物优选具有内酯环结构。

10. 发明授权

US07174478B2 Method for re-assigning data, apparatus for recording data and program 有权
标题翻译：重新分配数据的方法，记录数据和程序的装置
公开(公告)号：US07174478B2
公开(公告)日：2007-02-06
申请号：US10639019
申请日：2003-08-11
申请人： Hideo Asano
发明人： Hideo Asano
IPC分类号： G06F11/00
CPC分类号： G11B20/1883 , G11B19/04 , G11B2020/1062 , G11B2220/20
摘要： Data difficult to be written to a target sector (write) of a hard disk is recorded to a MRAM. The target sector (write) to which the write has been difficult is checked in a background of performing data write to the next target sector (write). When there is no error, the data stored in the MRAM is written to the target sector (write) of the hard disk. When there is any error, the data stored in the MRAM is written to an alternative sector of the hard disk. Data difficult to be read from a target sector (read) of the hard disk is recorded to the MRAM. The target sector (read) from which the read has been difficult is checked in a background of performing data read from the next target sector (read). When there is any error, the data stored in the MRAM is written to an alternative sector of the hard disk.
摘要翻译：难以写入硬盘的目标扇区（写入）的数据被记录到MRAM中。在对下一个目标扇区（写入）执行数据写入的背景中，检查写入困难的目标扇区（写入）。当没有错误时，将存储在MRAM中的数据写入硬盘的目标扇区（写入）。当存在任何错误时，将存储在MRAM中的数据写入硬盘的替代扇区。从硬盘的目标扇区（读取）难以读取的数据被记录到MRAM中。在执行从下一个目标扇区（读取）读取的数据的背景中，检查难以读取的目标扇区（读取）。当存在任何错误时，将存储在MRAM中的数据写入硬盘的替代扇区。

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