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    • 1. 发明授权
    • Method and apparatus for driving a stepping motor
    • 用于驱动步进电机的方法和装置
    • US4959738A
    • 1990-09-25
    • US325978
    • 1989-03-20
    • Hiroshi FujiiShinji Katsuki
    • Hiroshi FujiiShinji Katsuki
    • H02P8/32G11B5/55H02P8/22
    • H02P8/22G11B5/553
    • In driving a stepping motor which, for example, is used to effect tracking movements of a head in an electronic still camera or other magnetic disk recording and/or reproducing apparatus, and which has a rotor and a plurality of phases to which input pulses are applied in predetermined sequences for establishing excitation states by which the rotor is stepped to respective positions, the input pulses are controlled for alternating between first and second excitation states corresponding to adjacent stepped positions between which it is desired to bring the rotor to rest. Such alternation is initially effected at a relatively low frequency so that the rotor oscillates between the stepped positions corresponding to the first and second excitation states, respectively, and then the frequency of alternation between the first and second excitation states is gradually increased to a value at which the rotor no longer oscillates with such alternation and comes to rest at a position between the stepped positions. A duty ratio is selected for the first and second excitation states which inversely corresponds to the ratio of the distances from the desired position of rest of the rotor to the stepped positions of the latter corresponding to the first and second excitation states, respectively, and such duty ratio is applied to the alternation between the first and second excitation states at least during the increasing of the frequency of alternation to the value at which the rotor no longer oscillates.
    • 3. 发明申请
    • DATA COMMUNICATION DEVICE, DATA COMMUNICATION METHOD AND PROGRAM THEREOF
    • 数据通信设备,数据通信方法及其程序
    • US20080084823A1
    • 2008-04-10
    • US11858404
    • 2007-09-20
    • Koichi AKASAKAShinji Katsuki
    • Koichi AKASAKAShinji Katsuki
    • G08C15/00G08C17/00
    • G08C17/00
    • A communication device includes a communication unit having plural function operation units performing communication with an external device at plural prescribed communication speeds, and a control unit allowing the communication unit to receive a given kind of content data from the external device, estimating an optimum prescribed communication speed in which the power consumption amount becomes smallest from the plural prescribed communication speeds based on a bit rate of the content data, selecting a given function operation unit from the plural function operation units based on the estimated optimum communication speed, allowing the selected function operation unit to receive the given kind of content data at the estimated prescribed communication speed and controlling power consumption to the function operation units other than the function operation unit selected from the plural function operation units to be less than a fixed value.
    • 通信装置包括具有多个功能操作单元的通信单元,多个功能操作单元以多个规定的通信速度与外部设备进行通信,以及控制单元,其允许通信单元从外部设备接收给定种类的内容数据,估计最佳规定通信 基于内容数据的比特率从多个规定的通信速度中消耗功率量变得最小的速度,基于估计的最佳通信速度从多个功能运算单元中选择给定功能运算单元,允许选择的功能操作 单元,以估计的规定通信速度接收给定种类的内容数据,并且将从多个功能操作单元中选择的功能操作单元以外的功能操作单元的功耗控制为小于固定值。
    • 7. 发明申请
    • Image processing apparatus, image processing method and medium
    • 图像处理装置,图像处理方法和介质
    • US20050030389A1
    • 2005-02-10
    • US10941171
    • 2004-09-14
    • Shinji Katsuki
    • Shinji Katsuki
    • H04N1/41H04N5/225H04N5/232H04N5/765H04N5/781H04N11/04H04N19/00H04N19/42H04N19/50H04N19/51H04N19/65H04N5/228
    • H04N5/23254H04N5/23248H04N5/23264H04N5/23267
    • The invention provides an image processing apparatus wherein, when an image of an imaging object is picked up and converted into image data and the image data is compressed, the data amount can be reduced without deteriorating the picture quality. The image processing apparatus includes an image pickup section for picking up an image of an imaging object and converting the image into image data, a compression section for compressing the image data and outputting the compressed data, a detection section for detecting a data amount of the compressed data, and a control section for controlling an optical condition for the image picked up by the image pickup section in response to the data amount of the compressed data detected by the detection section. The compression section compresses the image data obtained by the conversion of the image pickup section based on the optical condition controlled by the control section.
    • 本发明提供一种图像处理装置,其中,当拾取成像对象的图像并将其转换为图像数据并且图像数据被压缩时,可以减少数据量而不降低图像质量。 该图像处理装置包括用于拾取成像对象的图像并将图像转换为图像数据的图像拾取部分,用于压缩图像数据并输出压缩数据的压缩部分,用于检测图像数据的数据量的检测部分 压缩数据和控制部分,用于响应于由检测部分检测到的压缩数据的数据量来控制由图像拾取部分拾取的图像的光学条件。 压缩部根据由控制部控制的光学状态来压缩通过摄像部的转换获得的图像数据。
    • 8. 发明授权
    • Image processing apparatus, image processing method and medium
    • 图像处理装置,图像处理方法和介质
    • US06798447B1
    • 2004-09-28
    • US09571250
    • 2000-05-16
    • Shinji Katsuki
    • Shinji Katsuki
    • H04N5228
    • H04N5/23254H04N5/23248H04N5/23264H04N5/23267
    • The invention provides an image processing apparatus wherein, when an image of an imaging object is picked up and converted into image data and the image data is compressed, the data amount can be reduced without deteriorating the picture quality. The image processing apparatus includes an image pickup section for picking up an image of an imaging object and converting the image into image data, a compression section for compressing the image data and outputting the compressed data, a detection section for detecting a data amount of the compressed data, and a control section for controlling an optical condition for the image picked up by the image pickup section in response to the data amount of the compressed data detected by the detection section. The compression section compresses the image data obtained by the conversion of the image pickup section based on the optical condition controlled by the control section.
    • 本发明提供一种图像处理装置,其中,当拾取成像对象的图像并将其转换为图像数据并且图像数据被压缩时,可以减少数据量而不降低图像质量。 该图像处理装置包括用于拾取成像对象的图像并将图像转换为图像数据的图像拾取部分,用于压缩图像数据并输出压缩数据的压缩部分,用于检测图像数据的数据量的检测部分 压缩数据和控制部分,用于响应于由检测部分检测到的压缩数据的数据量来控制由图像拾取部分拾取的图像的光学条件。 压缩部根据由控制部控制的光学状态来压缩通过摄像部的转换获得的图像数据。
    • 9. 发明授权
    • Optical disk recording and/or reproducing apparatus and access method
    • 光盘记录和/或再现装置和访问方法
    • US06778473B1
    • 2004-08-17
    • US09600205
    • 2000-08-17
    • Nobuyoshi TomitaShinji KatsukiHiroshi SaitohTakahiro Kusuyama
    • Nobuyoshi TomitaShinji KatsukiHiroshi SaitohTakahiro Kusuyama
    • G11B700
    • G11B7/131G11B7/0901
    • A recording and/or reproducing apparatus for an optical disc having a pit area where data has been recorded and also having a grooved area where data is to be recorded includes an optical pickup, an error signal generating unit, a shift signal generating unit and a servo controller. The optical pickup includes an objective lens for converging a light beam on a signal surface of the optical disc, a photodetector for receiving the light beam reflected from the signal surface and an actuator for moving the objective lens in a direction perpendicular to its optical axis. The shift signal generating unit is responsive to the output signal of the photodetector to generate a lens shift signal corresponding to the amount of shift of the objective lens from its neutral position. The servo controller drives the actuator based on the lens shift signal or the error signal to move the objective lens along the radial direction of the optical disc.
    • 一种用于光盘的记录和/或再现装置,其具有已经记录数据的凹坑区域并且还具有要记录数据的凹槽区域的光盘包括光学拾取器,误差信号产生单元,移位信号产生单元和 伺服控制器。 光学拾取器包括用于将光束会聚在光盘的信号表面上的物镜,用于接收从信号表面反射的光束的光电检测器和用于在垂直于其光轴的方向上移动物镜的致动器。 移位信号发生单元响应于光电检测器的输出信号,以产生对应于物镜从其中立位置的偏移量的透镜移位信号。 伺服控制器基于透镜移位信号或误差信号驱动致动器,以沿着光盘的径向方向移动物镜。
    • 10. 发明授权
    • Data communication device, data communication method and program thereof
    • 数据通信装置,数据通信方法及程序
    • US08270297B2
    • 2012-09-18
    • US11858404
    • 2007-09-20
    • Koichi AkasakaShinji Katsuki
    • Koichi AkasakaShinji Katsuki
    • G08C15/00
    • G08C17/00
    • A communication device includes a communication unit having plural function operation units performing communication with an external device at plural prescribed communication speeds, and a control unit allowing the communication unit to receive a given kind of content data from the external device, estimating an optimum prescribed communication speed in which the power consumption amount becomes smallest from the plural prescribed communication speeds based on a bit rate of the content data, selecting a given function operation unit from the plural function operation units based on the estimated optimum communication speed, allowing the selected function operation unit to receive the given kind of content data at the estimated prescribed communication speed and controlling power consumption to the function operation units other than the function operation unit selected from the plural function operation units to be less than a fixed value.
    • 通信装置包括具有多个功能操作单元的通信单元,多个功能操作单元以多个规定的通信速度与外部设备进行通信,以及控制单元,其允许通信单元从外部设备接收给定种类的内容数据,估计最佳规定通信 基于内容数据的比特率从多个规定的通信速度中消耗功率量变得最小的速度,基于估计的最佳通信速度从多个功能运算单元中选择给定功能运算单元,允许选择的功能操作 单元,以估计的规定通信速度接收给定种类的内容数据,并且将从多个功能操作单元中选择的功能操作单元以外的功能操作单元的功耗控制为小于固定值。