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    CHIP SEMICONDUCTOR PARA CABEZAL DE IMPRESION.
    3.
    发明专利
    CHIP SEMICONDUCTOR PARA CABEZAL DE IMPRESION. 未知

    公开(公告)号：ES2249337T3

    公开(公告)日：2006-04-01

    申请号：ES01104719

    申请日：1992-08-03

    Applicant: CANON KK

    Inventor： ISHINAGA HIROYUKI ,  OGAWA MASAHIKO ,  IKEDA MASAMI ,  SAITO ASAO ,  SAIKAWA HIDEO ,  YAMANAKA AKIHIRO

    IPC: B41J2/05 ,  B41J2/14 ,  B41J2/16 ,  B41J2/35

    Abstract: Chip semiconductor (1) para un cabezal de impresión, que comprende: una serie de elementos de impresión (2, 2C, 2M, 2Y) dispuestos para diferentes colores con los que se lleva a cabo la impresión; y circuitos de activación integrados para recibir datos de imagen, cuyos elementos de impresión y dichos circuitos de activación están integrados en dicho chip, caracterizado porque: los circuitos de activación integrados (10 a 13; 10 a 13, 48; 11 a 13, 22, 23, 25, 27) reciben datos de imagen serie (17) que tienen dispuestos datos de imagen en serie que corresponden a los diferentes colores mencionados y suministran señales en paralelo (1034C, 1034M, 1034Y) hacia dichos elementos de impresión para diferentes colores.

    5.
    发明专利
    未知

    公开(公告)号：DE69231408T2

    公开(公告)日：2001-02-15

    申请号：DE69231408

    申请日：1992-05-13

    Applicant: CANON KK

    Inventor： SHIBATA MASARU ,  ICHIKAWA FUMIO ,  SAITO ASAO ,  YAMANAKA AKIHIRO

    IPC: B41J2/01 ,  B41J2/04 ,  B41J25/34 ,  B41J29/393 ,  H04N1/407

    Abstract: A table having a plurality of holding portions for holding recording heads to be tested is arranged to be pivotal between a printing position and a changing position, so that the recording head located at the changing position can be changed during estimation of the recording head located at the printing position. An estimation pattern in which dots are arranged so as not to contact each other is printed on a recording medium by the recording head held by the holding portion located at the printing position. The printed estimation pattern is read by an image pick-up device, and character amounts in units of dots are extracted from image data obtained by the image pick-up device. Pattern estimated values are calculated according to the dot character amounts, and whether or not the recording head is normal is judged on the basis of the calculated pattern estimated values. Another estimation pattern is printed on the recording medium. The printed pattern is read by the image pick-up device, and an edge image is extracted from density image data obtained by the image pick-up device. After enlargement/reduction processing is performed for the edge image, an edge image is extracted again. Shape character values in units of areas separated by edge lines of the edge image are obtained, and the pattern and a stain if any are discriminated based on the shape character values, thereby detecting a stain state. A one-dimensional average density in the line direction of the pattern is obtained from the density image data, and a line width is obtained based on the average density. A stain is detected on the basis of the line width. Thus, whether or not a recording head is normal is estimated.

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