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    Pixel clock generating device and image forming apparatus
    1.
    发明授权
    Pixel clock generating device and image forming apparatus 有权
    像素时钟发生装置和图像形成装置

    公开(公告)号：US09030517B2

    公开(公告)日：2015-05-12

    申请号：US13042006

    申请日：2011-03-07

    Applicant: Naruhiro Masui

    Inventor： Naruhiro Masui

    IPC: B41J2/435 ,  H04N1/053 ,  G02B26/12 ,  G06K15/12 ,  H04N1/113 ,  H04N1/50 ,  G03G15/04

    CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/127 ,  G03G15/04072 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/506 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04768 ,  H04N2201/04772 ,  H04N2201/04774 ,  H04N2201/04775 ,  H04N2201/04784 ,  H04N2201/04789 ,  H04N2201/04793 ,  H04N2201/04794 ,  H04N2201/04798

    Abstract: A pixel clock generating device includes a time interval detection unit detecting a time interval between a first signal and a second signal in each of cyclically repeating N (≧2) time periods; a comparing unit cyclically selecting a target value from N target values corresponding to the N time periods and outputting an error indicating a difference between the detected time interval and the selected target value for each of the N time periods; a frequency calculation unit correcting a frequency of the pixel clock signal based on the error and cyclically generating a frequency specification signal indicating the corrected frequency for each of the N time periods; a high-frequency clock generating unit generating a high-frequency clock signal; and a pixel clock generating unit generating a pixel clock signal based on the frequency specification signal and the high-frequency clock signal.

    Abstract translation: 像素时钟发生装置包括时间间隔检测单元，其检测周期性地重复的N（≥2）个时间段中的每一个中的第一信号和第二信号之间的时间间隔; 比较单元，从与N个时段对应的N个目标值周期性地选择目标值，并且输出针对所述N个时间段中的每一个的所述检测到的时间间隔与所选择的目标值之间的差异的误差; 频率计算单元，基于所述误差校正所述像素时钟信号的频率，并且循环地生成指示所述N个时间段中的每一个的校正频率的频率指定信号; 产生高频时钟信号的高频时钟发生单元; 以及像素时钟生成单元，其基于频率指定信号和高频时钟信号生成像素时钟信号。

    PIXEL CLOCK GENERATING DEVICE AND IMAGE FORMING APPARATUS
    2.
    发明申请
    PIXEL CLOCK GENERATING DEVICE AND IMAGE FORMING APPARATUS 有权
    像素时钟生成装置和图像形成装置

    公开(公告)号：US20110221739A1

    公开(公告)日：2011-09-15

    申请号：US13042006

    申请日：2011-03-07

    Applicant: NARUHIRO MASUI

    Inventor： NARUHIRO MASUI

    IPC: G06F3/038

    CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/127 ,  G03G15/04072 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/506 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04768 ,  H04N2201/04772 ,  H04N2201/04774 ,  H04N2201/04775 ,  H04N2201/04784 ,  H04N2201/04789 ,  H04N2201/04793 ,  H04N2201/04794 ,  H04N2201/04798

    Abstract: A pixel clock generating device includes a time interval detection unit detecting a time interval between a first signal and a second signal in each of cyclically repeating N (≧2) time periods; a comparing unit cyclically selecting a target value from N target values corresponding to the N time periods and outputting an error indicating a difference between the detected time interval and the selected target value for each of the N time periods; a frequency calculation unit correcting a frequency of the pixel clock signal based on the error and cyclically generating a frequency specification signal indicating the corrected frequency for each of the N time periods; a high-frequency clock generating unit generating a high-frequency clock signal; and a pixel clock generating unit generating a pixel clock signal based on the frequency specification signal and the high-frequency clock signal.

    Abstract translation: 像素时钟发生装置包括时间间隔检测单元，其检测周期性地重复的N（≥2）个时间段中的每一个中的第一信号和第二信号之间的时间间隔; 比较单元，从与N个时段对应的N个目标值周期性地选择目标值，并且输出针对所述N个时间段中的每一个的所述检测到的时间间隔与所选择的目标值之间的差异的误差; 频率计算单元，基于所述误差校正所述像素时钟信号的频率，并且循环地生成指示所述N个时间段中的每一个的校正频率的频率指定信号; 产生高频时钟信号的高频时钟发生单元; 以及像素时钟生成单元，其基于频率指定信号和高频时钟信号生成像素时钟信号。

    Image forming apparatus capable of effectively correcting main scanning misregistration
    3.
    发明授权
    Image forming apparatus capable of effectively correcting main scanning misregistration 有权
    能够有效地校正主扫描不对准的图像形成装置

    公开(公告)号：US07518628B2

    公开(公告)日：2009-04-14

    申请号：US11586565

    申请日：2006-10-26

    Applicant: Yuichiro Shukuya

    Inventor： Yuichiro Shukuya

    IPC: B41J2/435

    CPC classification number: H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04768 ,  H04N2201/04775 ,  H04N2201/04781 ,  H04N2201/04786

    Abstract: An image forming apparatus includes a light source, a deflector, beam detectors, a clock generator, a measurement mechanism, a frequency corrector, and a phase corrector. The light source illuminates in response to image data. The deflector deflects an optical beam into a scanning beam. The beam detectors including first and second beam detectors detect the scanning beam. The clock generator generates writing clock signals. The measurement mechanism measures a count number of the writing clock signals generated during a period between the scanning beam is detected by the first and second beam detectors. The frequency corrector corrects a frequency of the writing clock signals such that the count number measured becomes substantially equivalent to a predetermined number. The phase corrector varies a phase of the writing clock signals such that the count number is substantially constant before and after the phase of the writing clock signals is varied.

    Abstract translation: 图像形成装置包括光源，偏转器，光束检测器，时钟发生器，测量机构，频率校正器和相位校正器。 光源响应于图像数据而亮起。 偏转器将光束偏转成扫描光束。 包括第一和第二光束检测器的光束检测器检测扫描光束。 时钟发生器产生写入时钟信号。 测量机构测量由第一和第二光束检测器检测的扫描光束之间的周期期间产生的写入时钟信号的计数。 频率校正器校正写入时钟信号的频率，使得测量的计数值基本上等于预定数量。 相位校正器改变写入时钟信号的相位，使得在写入时钟信号的相位变化之前和之后，计数数量基本上是恒定的。

    Image forming apparatus capable of effectively correcting main scanning misregistration
    4.
    发明申请
    Image forming apparatus capable of effectively correcting main scanning misregistration 有权
    能够有效地校正主扫描不对准的图像形成装置

    公开(公告)号：US20070091165A1

    公开(公告)日：2007-04-26

    申请号：US11586565

    申请日：2006-10-26

    Applicant: Yuichiro Shukuya

    Inventor： Yuichiro Shukuya

    IPC: B41J2/435

    CPC classification number: H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04768 ,  H04N2201/04775 ,  H04N2201/04781 ,  H04N2201/04786

    Abstract: An image forming apparatus includes a light source, a deflector, beam detectors, a clock generator, a measurement mechanism, a frequency corrector, and a phase corrector. The light source illuminates in response to image data. The deflector deflects an optical beam into a scanning beam. The beam detectors including first and second beam detectors detect the scanning beam. The clock generator generates writing clock signals. The measurement mechanism measures a count number of the writing clock signals generated during a period between the scanning beam is detected by the first and second beam detectors. The frequency corrector corrects a frequency of the writing clock signals such that the count number measured becomes substantially equivalent to a predetermined number. The phase corrector varies a phase of the writing clock signals such that the count number is substantially constant before and after the phase of the writing clock signals is varied.

    Abstract translation: 图像形成装置包括光源，偏转器，光束检测器，时钟发生器，测量机构，频率校正器和相位校正器。 光源响应于图像数据而亮起。 偏转器将光束偏转成扫描光束。 包括第一和第二光束检测器的光束检测器检测扫描光束。 时钟发生器产生写入时钟信号。 测量机构测量由第一和第二光束检测器检测的扫描光束之间的周期期间产生的写入时钟信号的计数。 频率校正器校正写入时钟信号的频率，使得测量的计数值基本上等于预定数量。 相位校正器改变写入时钟信号的相位，使得在写入时钟信号的相位变化之前和之后，计数数量基本上是恒定的。

    Optical scanning device and image forming apparatus
    6.
    发明授权
    Optical scanning device and image forming apparatus 有权
    光学扫描装置和图像形成装置

    公开(公告)号：US08314975B2

    公开(公告)日：2012-11-20

    申请号：US12563214

    申请日：2009-09-21

    Applicant: Tadashi Nakamura

    Inventor： Tadashi Nakamura

    IPC: H04N1/04

    CPC classification number: H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0082 ,  H04N2201/02443 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04775 ,  H04N2201/04798

    Abstract: A first main-scanning-position correction unit divides a surface to be scanned into first areas in a main scanning direction into areas, sets a separate clock-pulse timing for first area, and corrects a main-scanning position error. A second main-scanning-position correction unit divides the surface into second areas in the main scanning direction based on first-scanning-position correction data, sets a separate clock-pulse timing for each second area, and corrects the main-scanning position error.

    Abstract translation: 第一主扫描位置校正单元将要扫描的表面沿主扫描方向划分成第一区域，设置第一区域的单独的时钟脉冲定时，并校正主扫描位置误差。 第二主扫描位置校正单元基于第一扫描位置校正数据将主表面划分成主扫描方向的第二区域，为每个第二区域设置单独的时钟脉冲定时，并校正主扫描位置误差 。

    IMAGE FORMING APPARATUS AND IMAGE WRITE START POSITION ADJUSTING METHOD FOR THE SAME
    8.
    发明申请
    IMAGE FORMING APPARATUS AND IMAGE WRITE START POSITION ADJUSTING METHOD FOR THE SAME 有权
    图像形成装置和图像写入开始位置调整方法

    公开(公告)号：US20070115342A1

    公开(公告)日：2007-05-24

    申请号：US11625059

    申请日：2007-01-19

    Applicant: Haruhiko NAKATSU

    Inventor： Haruhiko NAKATSU

    IPC: B41J2/435

    CPC classification number: G03G15/326 ,  G03G15/0435 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04712 ,  H04N2201/04717 ,  H04N2201/04722 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04767 ,  H04N2201/04774 ,  H04N2201/04775 ,  H04N2201/04786 ,  H04N2201/04794

    Abstract: A high-quality image forming apparatus that is capable of accurately adjusting the size and position of an image during image formation on a second surface of a transfer material, even when there has been expansion/contraction of the transfer material due to thermal fixing after image formation on a first surface thereof, to thereby avoid image displacement during two-sided image formation and multiple image formation. A pulse adjusting section sets a second number of pulses of the image clock corresponding to a distance from BD signal detector to the write start position of the latent image during image formation on the second surface, to a number of pulses different from a first number of pulses of the image clock corresponding to a distance from the horizontal synchronization signal detecting device to the write start position of the latent image during image formation on the first surface, based on the first number of pulses of the image clock during image formation on the first surface, in accordance with an expansion/contraction ratio of the transfer material after fixing of the image on the first surface.

    Abstract translation: 一种能够在图像形成期间在转印材料的第二表面上精确地调整图像的尺寸和位置的高质量图像形成装置，即使当由于图像之后的热定影而导致的转印材料的膨胀/收缩 在其第一表面上形成，从而避免在双面图像形成和多次图像形成期间的图像位移。 脉冲调整部分将在第二表面上的图像形成期间对应于距离BD信号检测器的距离的图像时钟的第二数量脉冲设置为潜像的写入开始位置到不同于第一数量 基于在第一表面上的图像形成期间的图像时钟的第一数量的脉冲，对应于从水平同步信号检测装置到第一表面上的图像形成期间的潜像的写入开始位置的图像时钟的脉冲 表面，根据在第一表面上固定图像之后的转印材料的膨胀/收缩比。

    Digital resolution translator
    9.
    发明授权
    Digital resolution translator 失效
    数字分辨率翻译器

    公开(公告)号：US06476932B1

    公开(公告)日：2002-11-05

    申请号：US08899969

    申请日：1997-07-24

    Applicant: Frank J. Moizio ,  Edward C. Musall ,  Martin A. Wand ,  Steve T. Jenkins

    Inventor： Frank J. Moizio ,  Edward C. Musall ,  Martin A. Wand ,  Steve T. Jenkins

    IPC: G06K100

    CPC classification number: H03L7/00 ,  H04N1/047 ,  H04N1/40068 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04775 ,  H04N2201/04794

    Abstract: A method and system for digital resolution translation. An input frequency is received, as is a desired output frequency. The desired output frequency is measured directly and compared with the input frequency. The specified output frequency is dynamically adjusted to compensate for variations in the input frequency, while a fixed relationship between the input and output is kept intact. The relationship between the input and output frequencies can be arbitrary, non-integer or integer. The system consists of an execution process (54) and the adjusted output frequency is sent to a system as a sampling signal. The system reset/restart capability allows for a repeatable phase relationship between the output and the input from any given reset point.

    Abstract translation: 一种用于数字分辨率转换的方法和系统。 接收输入频率，如期望的输出频率。 所需的输出频率直接测量并与输入频率进行比较。 动态调整指定的输出频率以补偿输入频率的变化，而输入和输出之间的固定关系保持不变。 输入和输出频率之间的关系可以是任意的，非整数或整数。 系统由执行过程（54）组成，调整后的输出频率作为采样信号发送给系统。 系统复位/重新启动功能允许从任何给定的复位点输出和输入之间可重复的相位关系。

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