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    1.
    发明专利
    未知

    公开(公告)号：DE60010081T2

    公开(公告)日：2004-12-30

    申请号：DE60010081

    申请日：2000-06-26

    Applicant: CANON FINETECH INC

    Inventor： MATSUDA YUJI

    IPC: B41J29/393 ,  B41J2/045

    Abstract: A sensor configuration and signal processing, which are not affected by a paper rise when a print pattern for auto head shading and density correction is read, are provided. A predetermined print pattern is printed with a plurality of heads, and the predetermined pattern that is printed is scanned with a sensor (110) to detect a density unevenness for the print pattern in each color on a nozzle basis. The sensor (110) comprises a light emitting element which emits a light including all light regions, R, G, and B, and a plurality of light receiving elements each of which receives R, G, and B lights, respectively. The plurality of light receiving elements are arranged in a main scanning direction. The print pattern printed by each head is read by the light receiving element for the complementary color light of the pattern and the light receiving element for a non-complementary color light of the pattern, and a change in density level in the nozzle column direction is detected based on the difference between the two outputs.

    4.
    发明专利
    未知

    公开(公告)号：DE60010081D1

    公开(公告)日：2004-05-27

    申请号：DE60010081

    申请日：2000-06-26

    Applicant: CANON FINETECH INC

    Inventor： MATSUDA YUJI

    IPC: B41J29/393 ,  B41J2/045

    Abstract: A sensor configuration and signal processing, which are not affected by a paper rise when a print pattern for auto head shading and density correction is read, are provided. A predetermined print pattern is printed with a plurality of heads, and the predetermined pattern that is printed is scanned with a sensor (110) to detect a density unevenness for the print pattern in each color on a nozzle basis. The sensor (110) comprises a light emitting element which emits a light including all light regions, R, G, and B, and a plurality of light receiving elements each of which receives R, G, and B lights, respectively. The plurality of light receiving elements are arranged in a main scanning direction. The print pattern printed by each head is read by the light receiving element for the complementary color light of the pattern and the light receiving element for a non-complementary color light of the pattern, and a change in density level in the nozzle column direction is detected based on the difference between the two outputs.

    5.
    发明专利
    未知

    公开(公告)号：DE69627364T2

    公开(公告)日：2004-05-19

    申请号：DE69627364

    申请日：1996-10-17

    Applicant: CANON FINETECH INC

    Inventor： MATSUDA YUJI

    IPC: B41J2/01 ,  B41J2/21 ,  B41J25/304 ,  B41J29/393

    Abstract: An ink type image forming device which accurately identifies a print pattern (test pattern) even in the case where a recording medium is somewhat raised or the recording medium is low in reflectance in an attempt to find a deviation in relative position of recording heads. When the output of a light receiving element (22) is substracted from the output of a light receiving element (21), both the outputs are offset by each other since variations in output are small at an area where the recording medium is raised. In the meantime, the light receiving elements are spaced in the direction (X) of movement of a carriage, and the output of the light receiving element corresponding to respective areas which constitute the print pattern steeply changes. As a result, a peak signal corresponding to the respective areas of the print pattern is obtained as a difference signal of outputs of the light receiving elements (fig. 8 (d)). Accordingly, even if the recording medium happens to be raised, positions where the respective areas of the print pattern are existant can be positively detected.

    Image forming apparatus
    6.
    发明专利
    Image forming apparatus 审中-公开
    图像形成装置

    公开(公告)号：JP2005271342A

    公开(公告)日：2005-10-06

    申请号：JP2004086323

    申请日：2004-03-24

    Applicant: Canon Finetech Inc ,  キヤノンファインテック株式会社

    Inventor： MATSUDA YUJI

    IPC: B41J2/01 ,  B41J19/18

    Abstract: PROBLEM TO BE SOLVED: To form an adequate image by minimizing an influence of the occurrence of ink mist even when a desired output from a linear scale sensor is not gained by virtue of the occurrence of the ink mist.
    SOLUTION: This image forming apparatus comprises a linear scale provided to a scanning path of a carriage in parallel thereto, the linear scale sensor 402 which is mounted on the carriage and generates a plurality of phase signals by moving along the linear scale, and a plurality of counting means (edge detection circuits a-f and linear scale counters a-f) for discriminating positions of the carriage by using arbitrary two phases in the plurality of phase signals. One which mostly adequately acts can be selected from among the plurality of counting means.
    COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题：即使当由于墨雾的发生而不能获得来自线性刻度传感器的期望输出时，通过最小化墨雾发生的影响来形成足够的图像。 解决方案：该图像形成装置包括：平行于滑架的扫描路径的线性刻度，安装在滑架上的线性刻度传感器402，并沿线性刻度移动产生多个相位信号， 以及多个计数装置（边缘检测电路af和线性刻度计数器af），用于通过在多个相位信号中使用任意两相来识别滑架的位置。 可以从多个计数装置中选择主要充分动作的装置。 版权所有（C）2006，JPO＆NCIPI

    Image forming method and apparatus
    7.
    发明专利
    Image forming method and apparatus 有权
    图像形成方法和装置

    公开(公告)号：JP2005014420A

    公开(公告)日：2005-01-20

    申请号：JP2003182901

    申请日：2003-06-26

    Applicant: Canon Finetech Inc ,  キヤノンファインテック株式会社

    Inventor： MATSUDA YUJI

    IPC: B41J2/01

    Abstract: PROBLEM TO BE SOLVED: To perform crop printing well without increasing the cost significantly even in case of a broadsheet printer.
    SOLUTION: When crop printing is performed, print start position and print end position of a print head 103 are set on the outside of the end part of a sheet, and print density is reduced in the end area of the sheet when the print head 103 performs print scanning of that area. Preferably, image data is masked sequentially by different mask data when the print head 103 performs print scanning such that the density is varied stepwise from the outside toward the inside of a print sheet in the end area of the sheet.
    COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：即使在宽幅打印机的情况下，也可以显着地进行作物打印，而不会显着增加成本。

    解决方案：当执行裁剪打印时，打印头103的打印开始位置和打印结束位置被设置在纸张的端部的外侧，并且当纸张的端部区域中的打印浓度降低时， 打印头103执行该区域的打印扫描。 优选地，当打印头103执行打印扫描时，图像数据被不同的掩模数据顺序地屏蔽，使得密度从纸张的端部区域中的打印纸的外部向内部逐渐变化。 版权所有（C）2005，JPO＆NCIPI

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