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    • 21. 发明授权
    • Data recording disk and disk drive device for reducing wasted space on a data recording disk
    • 数据记录磁盘和磁盘驱动器设备,用于减少数据记录磁盘上浪费的空间
    • US06466387B1
    • 2002-10-15
    • US09124271
    • 1998-07-29
    • Kenji OgasawaraHiroshi YanagisawaKeiji Kobayashi
    • Kenji OgasawaraHiroshi YanagisawaKeiji Kobayashi
    • G11B509
    • G11B5/012G11B5/035G11B5/4886
    • The present invention solves a problem that useless or wasted space exists on a data recording disk between read/write heads of narrower head width than others in the case that an uniform track pitch is used, and a head width of each head varies due to a fabrication tolerance. A data recording disk of the present invention comprises a first data recording surface and a second data recording surface, and a track pitch of adjacent data recording tracks of the first data recording surface differs from a track pitch of adjacent data recording tracks of the second data recording surface. All data recording tracks of the first data recording surface have substantially the same track width, and all gaps of the first data recording surface have substantially the same gap width, and, all data recording tracks of the second data recording surface have substantially the same track width, and all gaps of the second data recording surface have substantially the same gap width.
    • 本发明解决了在使用均匀的轨道间距的情况下,在头部宽度较窄的读/写头之间的数据记录盘上存在无用或浪费的空间的问题,并且每个头的头部宽度由于 制造公差。 本发明的数据记录盘包括第一数据记录表面和第二数据记录表面,并且第一数据记录表面的相邻数据记录磁道的磁道间距与第二数据的相邻数据记录磁迹的磁道间距不同 记录表面。 第一数据记录表面的所有数据记录轨道具有基本相同的轨道宽度,并且第一数据记录表面的所有间隙具有基本上相同的间隙宽度,并且第二数据记录表面的所有数据记录轨迹具有基本相同的轨迹 宽度和第二数据记录表面的所有间隙具有基本上相同的间隙宽度。
    • 22. 发明授权
    • Electronic clock
    • 电子钟
    • US06381702B1
    • 2002-04-30
    • US09381762
    • 1999-11-29
    • Kenji Ogasawara
    • Kenji Ogasawara
    • G06F104
    • G04G3/02
    • A highly accurate electronic timepiece is provided in which the operation of a logical slowdown/speedup circuit for adjusting accuracy is controlled by a CPU. The output of an oscillation circuit is input to a system clock generation circuit which generates a system clock for operating the CPU. The output of an oscillation circuit is also supplied to a frequency dividing circuit, and an output of the frequency dividing circuit is supplied to an interrupt signal generating circuit to generate an interrupt signal to the CPU. A logical slowdown/speedup circuit increments a logical slowdown/speedup cycle counter allocated in RAM upon each interrupt operation and, when a predetermined count is reached, the logical slowdown/speedup circuit operates to adjust the timekeeping accuracy of the timepiece. Slowdown/speedup data stored in the logical slowdown/speedup circuit is acquired from a slowdown/speedup data input port. The logical slowdown/speedup circuit operates at two different cycles to perform accuracy adjustment.
    • 提供了一种高精度电子时计,其中用于调节精度的逻辑减速/加速电路的操作由CPU控制。 振荡电路的输出被输入到产生用于操作CPU的系统时钟的系统时钟产生电路。 振荡电路的输出也被提供给分频电路,并且分频电路的输出被提供给中断信号发生电路以产生到CPU的中断信号。 逻辑减速/加速电路在每个中断操作时递增分配在RAM中的逻辑减速/加速循环计数器,并且当达到预定计数时,逻辑减速/加速电路运行以调整计时器的计时精度。 从减速/加速数据输入端口获取存储在逻辑减速/加速电路中的减速/加速数据。 逻辑减速/加速电路在两个不同的周期运行以执行精度调整。
    • 23. 发明授权
    • Magnetic recording medium magnetic head positioning method, and magnetic
recording apparatus
    • 磁记录介质磁头定位方法及磁记录装置
    • US5905603A
    • 1999-05-18
    • US510173
    • 1995-08-02
    • Kenji OgasawaraHiroshi YanagisawaKoji Kurachi
    • Kenji OgasawaraHiroshi YanagisawaKoji Kurachi
    • G11B21/10G11B5/55G11B5/596
    • G11B5/59655G11B5/553G11B5/59688
    • A method and apparatus for accurately positioning the magnetic head of disk drives is disclosed. A recording medium is provided having two radial data structures formed thereon. Each radial data structure includes two parallel and adjacent data burst pattern trains. The first burst pattern is defined by a first side centrally aligned with a concentric data track and a second side opposed to the first side and centrally aligned with an adjacent concentric data track. The third burst pattern is defined by a third side spaced apart from the first side of the first burst pattern by a distance not greater than the read width of a magnetic head and a fourth side opposed to the third side and spaced apart from the second side by a distance not greater than the read width. The first radial data structure generates a first signal for positioning the magnetic head relative to the recording medium. The second radial data structure, parallel and offset from the first data structure, generates a second head position signal. Thus, the second head position signal is detected before the first head position signal becomes undetectable.
    • 公开了一种用于精确定位磁盘驱动器的磁头的方法和装置。 提供具有形成在其上的两个径向数据结构的记录介质。 每个径向数据结构包括两个并行和相邻的数据突发模式列。 第一突发图案由与同心数据轨道集中对准的第一侧和与第一侧相对并且与相邻同心数据轨道居中对准的第二侧限定。 第三突发图案由与第一突发图案的第一侧间隔开的距离不大于磁头的读取宽度的第三侧和与第三侧相对并与第二侧相隔开的第四侧限定 距离不大于读宽度。 第一径向数据结构产生用于相对于记录介质定位磁头的第一信号。 与第一数据结构平行和偏移的第二径向数据结构产生第二头位置信号。 因此,在第一头部位置信号变得不可检测之前检测到第二头部位置信号。
    • 26. 发明授权
    • Image forming apparatus having display device
    • 具有显示装置的图像形成装置
    • US08391740B2
    • 2013-03-05
    • US12402530
    • 2009-03-12
    • Kenji Ogasawara
    • Kenji Ogasawara
    • G03G15/00
    • G03G15/5016
    • A display device and an image forming apparatus capable of reducing discomfort of a worker during maintenance work and improving the work efficiency, are provided. In a copier, an orientation of a display screen of a display device is detected and when the display screen changes its orientation, an image appearing on the display screen changes accordingly. It is determined how the copier is viewed from a worker, and then screen display is performed so that an image appearing on the display device looks the same as the copier which the worker directly sees.
    • 提供了一种能够降低维护工作中的工人的不适和提高工作效率的显示装置和图像形成装置。 在复印机中,检测显示装置的显示画面的方向,并且当显示画面改变其方向时,出现在显示画面上的图像相应地改变。 确定如何从工作人员观看复印机,然后执行屏幕显示,使得显示装置上出现的图像看起来与工人直接看到的复印机相同。