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    • 22. 发明授权
    • Image forming apparatus and image density detecting method
    • 图像形成装置和图像浓度检测方法
    • US08654419B2
    • 2014-02-18
    • US13415082
    • 2012-03-08
    • Susumu MiyazakiIzumi KinoshitaMotohiro KawanabeTakeshi ShikamaTakuhei YokoyamaTatsuya Miyadera
    • Susumu MiyazakiIzumi KinoshitaMotohiro KawanabeTakeshi ShikamaTakuhei YokoyamaTatsuya Miyadera
    • H04N1/46
    • H04N1/3878H04N1/407H04N1/409
    • An image forming apparatus performs pseudo gradation processing using dithering, and includes an image carrier; a plurality of light-emitting element arrays arranged in a main-scanning direction and including a plurality of light-emitting elements; an image forming unit performing lighting control of the arrays and forming a pattern image on the image carrier; a detecting unit detecting a density of the pattern image; a position detecting unit detecting a position in the main-scanning direction of the detecting unit with respect to the light-emitting element arrays; a determining unit that, based on the detected position, determines whether the detecting unit is positioned at a proper detection position with respect to the pattern image on which noise has no effect; and an operation control unit that, when the detecting unit is positioned at the proper detection position, performs an image density detection operation on the pattern image using the detecting unit.
    • 图像形成装置使用抖动进行伪灰度处理,并且包括图像载体; 沿主扫描方向排列并包括多个发光元件的多个发光元件阵列; 图像形成单元,对所述阵列执行点亮控制,并在所述图像载体上形成图案图像; 检测单元,检测图案图像的浓度; 位置检测单元,相对于所述发光元件阵列检测所述检测单元的主扫描方向的位置; 确定单元,其基于所检测的位置,确定所述检测单元是否位于相对于其上没有影响的图案图像的适当检测位置; 以及操作控制单元,当所述检测单元位于适当的检测位置时,使用所述检测单元对所述图案图像执行图像浓度检测操作。
    • 28. 发明申请
    • Failure prediction method for magnetic disk devices, and a magnetic disk device using the same
    • 磁盘装置的故障预测方法以及使用其的磁盘装置
    • US20060034008A1
    • 2006-02-16
    • US11193925
    • 2005-07-28
    • Akira KojimaToru MiyazakiKunihiro NunomuraTakeshi Shikama
    • Akira KojimaToru MiyazakiKunihiro NunomuraTakeshi Shikama
    • G11B5/09
    • G11B19/04G11B20/18G11B20/1816
    • A warning against the possible failure is accurately sent from the magnetic disk device to a host device. In one embodiment, error indices per unit time are stored discontinuously/continuously for each magnetic head, and if the new index (partial integral error rate) updated with the stored multiple error indices as the items to be monitored satisfies required conditions, this state is diagnosed as an abnormality or a pseudo-abnormality, and reported to the host device. The partial integral error rate is updated with an increase in the number of sets of error indices. Each time a new set of error indices per unit time are stored, the oldest of the existing error indices to be monitored is discarded and one of the new error indexes is added. In this way, a new partial integral error rate is calculated from the fixed number of new sets of error indices to be monitored. When the partial integral error rate increases above a second required threshold, this state is reported as an abnormality to the host device since a failure is most likely to occur in the magnetic disk device.
    • 从磁盘装置向主机装置准确地发送可能发生故障的警告。 在一个实施例中,对于每个磁头,每单位时间的误差指数被不连续/连续地存储,并且如果作为被监视项目的所存储的多个误差索引更新的新索引(部分积分误差率)满足所需条件,则该状态为 诊断为异常或伪异常,并报告给主机。 部分积分误差率随误差指数集合数量的增加而更新。 每次存储每单位时间新的一组错误索引时,将丢弃要监视的最旧的现有错误索引,并添加一个新的错误索引。 以这种方式,从要监视的新的误差指数集合计算新的部分积分误差率。 当部分积分误差率增加到高于第二所需阈值时,该状态被报告为主机设备的异常,因为在磁盘设备中最可能发生故障。