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    Adjustment of image density in image forming apparatus
    1.
    发明公开
    Adjustment of image density in image forming apparatus 审中-公开
    Anpassung der Bilddichte在einer Bilderzeugungsvorrichtung

    公开(公告)号：EP2555059A2

    公开(公告)日：2013-02-06

    申请号：EP12178717.0

    申请日：2012-07-31

    申请人： Canon Kabushiki Kaisha

    发明人： Shirafuji, Yasuhito ,  Itagaki, Tomohisa ,  Zaima, Nobuhiko ,  Ishihara, Takahiro

    IPC分类号： G03G15/16

    CPC分类号： G03G15/161 ,  G03G15/0131 ,  G03G15/5058 ,  G03G2215/00059

    摘要： An image forming apparatus (100) configures a normal transfer potential in a yellow primary transfer unit (7Y), and configures a transfer potential (e.g. 0 volt) which does not cause any retransfer phenomenon of a yellow measurement image in image carriers (1M, 1C, 1K) located on the downstream side of the yellow primary transfer unit (7Y). When a color difference (ΔE) obtained from a reference density and a density of a measurement image on an intermediate transfer belt (6) becomes equal to or larger than a prescribed value (e.g. 3), the image forming apparatus (100) determines that multinary-color density adjustment is required.

    摘要翻译： 图像形成装置（100）在黄色一次转印单元（7Y）中配置正常转印电位，并且构成在图像载体中不引起黄色测量图像的任何再次发生现象的转移电位（例如0伏） 1C，1K）位于黄色一次转印单元（7Y）的下游侧。 当从中间转印带（6）的参考密度和测量图像的浓度获得的色差（“E”）等于或大于规定值（例如3）时，图像形成装置（100）确定 需要进行多色调密度调整。

    Image forming apparatus for detecting thickness and area ratio of toner layer
    2.
    发明公开
    Image forming apparatus for detecting thickness and area ratio of toner layer 有权
    Bilderzeugungsvorrichtung zur Erkennung der Dicke und desFlächenverhältnisseseiner Tonerschicht

    公开(公告)号：EP2535776A1

    公开(公告)日：2012-12-19

    申请号：EP12169941.7

    申请日：2012-05-30

    申请人： Canon Kabushiki Kaisha

    发明人： Shirafuji, Yasuhito ,  Itagaki, Tomohisa ,  Zaima, Nobuhiko ,  Ishihara, Takahiro

    IPC分类号： G03G15/043

    CPC分类号： G03G15/5054 ,  G03G15/043 ,  G03G15/5025 ,  G03G15/5058 ,  G03G2215/00029

    摘要： An image forming apparatus includes an image forming unit having an exposure unit and a developing unit; a detection unit configured to detect a thickness and an area ratio of a toner layer of a pattern image formed by the image forming unit; a storage unit configured to store data indicating permissible ranges for the thickness and the area ratio of the toner layer; and a correction unit configured to change, when the thickness or the area ratio of the toner layer detected by the detection unit falls outside the corresponding permissible range indicated by the data stored in the storage unit, a spot diameter of the laser beam so that the thickness and the area ratio of the toner layer respectively fall within the permissible ranges.

    摘要翻译： 图像形成装置包括具有曝光单元和显影单元的图像形成单元; 检测单元，被配置为检测由图像形成单元形成的图案图像的调色剂层的厚度和面积比; 存储单元，被配置为存储指示所述调色剂层的厚度和面积比的允​​许范围的数据; 以及校正单元，被配置为当由检测单元检测到的调色剂层的厚度或面积比落在存储在存储单元中的数据所指示的相应容许范围之外时，改变激光束的光斑直径，使得 调色剂层的厚度和面积比分别落在容许范围内。