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    Printing apparatus with plural page print medium conveyance control method
    4.
    发明授权
    Printing apparatus with plural page print medium conveyance control method 有权
    具有多页打印介质传送控制方法的打印设备

    公开(公告)号：US08340835B2

    公开(公告)日：2012-12-25

    申请号：US12372856

    申请日：2009-02-18

    申请人： Yuuji Takayama

    发明人： Yuuji Takayama

    IPC分类号： G05D13/00

    CPC分类号： B65H3/0684 ,  B65H7/02 ,  B65H2511/11 ,  B65H2511/30 ,  B65H2513/53 ,  B65H2553/51 ,  B65H2220/03 ,  B65H2220/02 ,  B65H2220/01

    摘要： A printing apparatus is controlled to generate a pulse signal so that a print medium conveyance speed detected by an encoder comes close to a target speed. The duty of the generated pulse signal is calculated every predetermined timing. When a sensor detects the leading end of the print medium, the duty of the pulse signal input to a feed motor is stored in a memory. It is determined whether the difference between the calculated duty and the stored duty has exceeded a predetermined value. If the difference has exceeded the predetermined value, supply of the pulse signal stops. When supply of the pulse stops, a conveyance roller is driven.

    摘要翻译： 控制打印装置产生脉冲信号，使得由编码器检测到的打印介质传送速度接近目标速度。 每个预定定时计算产生的脉冲信号的占空比。 当传感器检测到打印介质的前端时，输入到进给马达的脉冲信号的占空比被存储在存储器中。 确定所计算的占空比和所存储的占空比之间的差是否超过预定值。 如果差异超过预定值，脉冲信号的供给停止。 当脉冲供给停止时，传送辊被驱动。

    IMAGE FORMING APPARATUS
    5.
    发明申请
    IMAGE FORMING APPARATUS 有权
    图像形成装置

    公开(公告)号：US20120195650A1

    公开(公告)日：2012-08-02

    申请号：US13354778

    申请日：2012-01-20

    申请人： Yuichi Ogawa ,  Yuuji Takayama

    发明人： Yuichi Ogawa ,  Yuuji Takayama

    IPC分类号： G03G15/01

    CPC分类号： G03G15/5058 ,  G03G15/0131 ,  G03G15/0189 ,  G03G2215/00059 ,  G03G2215/00063 ,  G03G2215/0129 ,  G03G2215/0164

    摘要： An image forming apparatus corrects, for uneven density caused by uneven rotation of a rotation speed of a rotation member, and diffuses so as to reduce the uneven density, for a pixel of interest whose density exceeds the upper limit of the output density out of the pixels of the corrected image data, the excess of the density more than the upper limit to a plurality of peripheral pixels while maintaining the center of gravity of the density.

    摘要翻译： 图像形成装置对于由旋转构件的旋转速度的不均匀旋转引起的不均匀的密度进行校正，并且扩散以减小密度超过输出密度的上限的感兴趣像素的不均匀浓度 校正图像数据的像素，密度超过多个周边像素的上限的密度，同时保持密度的重心。

    IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD
    6.
    发明申请
    IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD 失效
    图像处理装置和图像处理方法

    公开(公告)号：US20100171988A1

    公开(公告)日：2010-07-08

    申请号：US12646751

    申请日：2009-12-23

    申请人： Tomoyuki Saiki ,  Go Araki ,  Yuuji Takayama ,  Hisashi Ishikawa

    发明人： Tomoyuki Saiki ,  Go Araki ,  Yuuji Takayama ,  Hisashi Ishikawa

    IPC分类号： H04N1/40

    CPC分类号： H04N1/4092 ,  H04N1/405

    摘要： An image processing apparatus 101 that generates output image data based on multi-level image data is provided with an error diffusion processing unit 104 that generates tone pixel data from the pixel-of-interest data according to an error diffusion method, a dither processing unit 103 that generates tone pixel data from the pixel-of-interest data according to a dither processing method, an allotment ratio determination unit 105 that increases the allotment ratio with respect to the error diffusion method as the difference between the maximum density and the minimum density increases, and a composition unit 109 that composites the tone pixel data for a pixel of interest that has been generated by the error diffusion processing unit 104 and the dither processing unit 103 according to the allotment ratios determined by the allotment ratio determination unit 105, and outputs the composited data as pixel data of the output image data.

    摘要翻译： 根据多级图像数据生成输出图像数据的图像处理装置101设置有误差扩散处理单元104，该误差扩散处理单元104根据误差扩散方法从兴趣像素数据生成色调像素数据，抖动处理单元 103，其根据抖动处理方法从兴趣像素数据生成色调像素数据;分配比率确定单元105，其将相对于误差扩散方法的分配比增加为最大密度和最小密度之间的差 以及合成单元109，其根据由分配比率确定单元105确定的分配比率，对由误差扩散处理单元104和抖动处理单元103生成的感兴趣像素的色调像素数据进行合成;以及 输出合成数据作为输出图像数据的像素数据。

    IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF
    7.
    发明申请
    IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF 有权
    图像形成装置及其控制方法

    公开(公告)号：US20100103469A1

    公开(公告)日：2010-04-29

    申请号：US12604506

    申请日：2009-10-23

    申请人： Go Araki ,  Yuuji Takayama ,  Tomoyuki Saiki ,  Hisashi Ishikawa

    发明人： Go Araki ,  Yuuji Takayama ,  Tomoyuki Saiki ,  Hisashi Ishikawa

    IPC分类号： H04N1/409 ,  H04N1/04

    CPC分类号： H04N1/04 ,  H04N1/4052 ,  H04N1/4056

    摘要： A 2-pixel averaging unit (101) halves an input image in the subscanning direction, and a multi-level error diffusion unit (102) performs multi-level error diffusion processing. A 2-pixel reconstruction unit (103) replaces each pixel with two pixels adjacent in the subscanning direction. A density value exchange unit (104) exchanges pixel values adjacent in the subscanning direction in each of 2×2 pixel blocks arranged in a checkered pattern in the image after replacement. High-density blocks each serving as a set of high-density dots and low-density blocks each serving as a set of low-density dots can be generated as 2×2 pixel blocks. The exposure region can be concentrated in PWM conversion.

    摘要翻译： 2像素平均单元（101）将副扫描方向上的输入图像减半，多级误差扩散单元（102）执行多级误差扩散处理。 2像素重构单元（103）用副扫描方向相邻的两个像素代替每个像素。 密度值交换单元（104）在更换后的图像中以排列图案的2×2像素块中的每一个中交换副扫描方向相邻的像素值。 作为一组高密度点的高密度块和各自用作低密度点的集合的低密度块可以被生成为2×2像素块。 曝光区域可以集中在PWM转换中。

    Image forming apparatus capable of correcting image information
    8.
    发明授权
    Image forming apparatus capable of correcting image information 有权
    能够校正图像信息的图像形成装置

    公开(公告)号：US08891981B2

    公开(公告)日：2014-11-18

    申请号：US13075584

    申请日：2011-03-30

    申请人： Tae Matsumoto ,  Tomoyuki Saiki ,  Takayuki Fukutani ,  Yuuji Takayama ,  Yuichi Ogawa

    发明人： Tae Matsumoto ,  Tomoyuki Saiki ,  Takayuki Fukutani ,  Yuuji Takayama ,  Yuichi Ogawa

    IPC分类号： G03G15/00 ,  G03G15/01

    CPC分类号： G03G15/0131 ,  G03G15/5058 ,  G03G2215/00059 ,  G03G2215/00063 ,  G03G2215/0129 ,  G03G2215/0164

    摘要： An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information.

    摘要翻译： 图像形成装置以根据图像形成装置的浓度特性的变化确定的水平执行条带校正，以实现高质量图像。 在图像形成装置中，条带校正单元基于输入图像信息获取关于在图像载体上形成调色剂图像的旋转构件的副扫描方向上可能发生的浓度变化的原因的信息，并且设置 基于获取的信息，根据密度变化确定的浓度校正的水平导致信息。

    IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
    10.
    发明申请
    IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD 失效
    图像形成装置和图像形成方法

    公开(公告)号：US20100171970A1

    公开(公告)日：2010-07-08

    申请号：US12638524

    申请日：2009-12-15

    申请人： Yuuji Takayama ,  Hisashi Ishikawa ,  Tomoyuki Saiki ,  Go Araki

    发明人： Yuuji Takayama ,  Hisashi Ishikawa ,  Tomoyuki Saiki ,  Go Araki

    IPC分类号： H04N1/60 ,  G06K9/00

    CPC分类号： G06K9/38 ,  H04N1/60

    摘要： An image forming apparatus is provided with a resolution conversion unit 101 that integrates n pixels that are contiguous in the sub-scanning direction, and that determines an average value of pixel values of the n pixels as a pixel value of integrated pixels, a quantization unit 103 that quantizes the pixel value of the integrated pixels to N levels, an image analysis unit 100 that performs first judgment processing for judging whether the difference between the pixel values of the n input pixels exceeds a threshold value set in advance, and second judgment processing for judging whether a direction in which the pixel values of the n input pixels becomes greater is a forward direction of the sub-scanning direction or an opposite direction, and a pixel selection unit 104 that determines n output pixels, based on the judgment results, from a quantization result of the integrated pixels.

    摘要翻译： 图像形成装置设置有分辨率转换单元101，其对在副扫描方向上连续的n个像素进行积分，并且将n个像素的像素值的平均值确定为积分像素的像素值，量化单元 103，其将积分像素的像素值量化为N个电平;图像分析单元100，执行用于判断n个输入像素的像素值之间的差是否超过预先设定的阈值的第一判断处理，以及第二判断处理 用于判断n个输入像素的像素值是否变大的方向是副扫描方向或相反方向的正向，以及基于判断结果确定n个输出像素的像素选择单元104， 从集成像素的量化结果。