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    Ink-jet printing system, and ink-jet printing method and apparatus
    2.
    发明公开
    Ink-jet printing system, and ink-jet printing method and apparatus 失效
    Tintenstrahldrucksystem，Verfahren und Apparat zum Tintenstrahldrucken

    公开(公告)号：EP0803360A3

    公开(公告)日：1998-08-12

    申请号：EP97302734

    申请日：1997-04-22

    Applicant: CANON KK

    Inventor： OHTSUKA NAOJI ,  YANO KENTARO ,  TAKAHASHI KIICHIRO ,  NISHIKORI HITOSHI ,  IWASAKI OSAMU ,  KANEMATSU DAIGORO ,  KANDA HIDEHIKO

    IPC: B41J2/05 ,  B41J2/175 ,  G06K15/10 ,  H04N1/40 ,  B41J2/205

    CPC classification number: B41J2/17553 ,  B41J2/04553 ,  B41J2/04563 ,  B41J2/0458 ,  B41J2/1752 ,  G06K15/107 ,  H04N1/40025

    Abstract: It is checked whether an ink used in a print head has a high density. The type of a printing medium used for a print operation is also identified. An image is printed by scanning the print head once or a plurality of numbers of times. When a print operation is to be performed by using a thick ink, an image is printed by using mask data and the driving frequency of the head which are set for the thick ink. When a print operation is to be performed by using a thin ink, an image is printed by using mask data and the driving frequency of the head which are set for the thin ink and the type of printing medium used for the print operation. Codes of the respective color data of print data are determined in accordance with the types of inks used for a print operation, and an image is printed by printing a plurality of dots or dots in an overlapping state by the multi-pass method.

    Abstract translation: 检查打印头中使用的墨水是否具有高密度。 还识别用于打印操作的打印介质的类型。 通过扫描打印头一次或多次打印图像。 当通过使用浓墨水进行打印操作时，通过使用为厚油墨设定的掩模数据和头部的驱动频率来打印图像。 当通过使用薄墨水进行打印操作时，通过使用用于薄墨水的打印头数据和头部的驱动频率以及用于打印操作的打印介质的类型来打印图像。 打印数据的各个颜色数据的代码根据用于打印操作的油墨的类型来确定，并且通过多遍方法以重叠状态打印多个点或点来打印图像。

    Recording apparatus, recording method, information processing apparatus and recording medium
    6.
    发明公开
    Recording apparatus, recording method, information processing apparatus and recording medium 失效
    Aufzeichnungsgerät，Aufzeichnungsverfahren，Informationsverarbeitungsgerätund Aufzeichnungsmedium

    公开(公告)号：EP0803367A3

    公开(公告)日：1998-08-12

    申请号：EP97302736

    申请日：1997-04-22

    Applicant: CANON KK

    Inventor： TAKAHASHI KIICHIRO ,  OHTSUKA NAOJI ,  NISHIKORI HITOSHI ,  IWASAKI OSAMU

    IPC: B41J2/01 ,  B41J2/175 ,  B41J2/205 ,  B41J2/21 ,  B41J2/52 ,  B41J19/14 ,  G06K15/10 ,  H04N1/405

    CPC classification number: G06K15/102 ,  B41J2/2132 ,  B41J19/142 ,  G06K2215/0094

    Abstract: The present invention is to achieve formation of a 2
    n -value image with data of n bits, thereby reducing the amount of image information to be transferred and processed, while improving the tonal rendition, thereby realizing high-quality recording system in the dot matrix recording suitable for personal use. For this purpose there is disclosed an ink jet recording apparatus and a method therefor, comprising an image process unit for generating multi-value information, an identification unit for identifying that the image data are multi-value information, an identification unit for the recording head, and an analysis unit for decoding the n-bit information, and featured by effecting multi-value recording while processing the n-bit data as multi-value information.

    Abstract translation: 本发明是为了形成具有n位数据的2n值图像，从而减少了要传送和处理的图像信息量，同时改进了音调再现，从而实现了高质量的记录系统 点阵记录适合个人使用。 为此，公开了一种喷墨记录装置及其方法，包括用于产生多值信息的图像处理单元，用于识别图像数据是多值信息的识别单元，用于记录头的识别单元 以及用于对n位信息进行解码的分析单元，其特征在于在将n位数据作为多值信息进行处理时进行多值记录。

    7.
    发明专利
    未知

    公开(公告)号：DE60224859T2

    公开(公告)日：2009-01-22

    申请号：DE60224859

    申请日：2002-04-29

    Applicant: CANON KK

    Inventor： TESHIGAWARA MINORU ,  OTSUKA NAOJI ,  TAKAHASHI KIICHIRO ,  IWASAKI OSAMU

    IPC: B41J2/01 ,  B41J19/14

    Abstract: A print apparatus that, without significantly reducing an overall printing speed, allows a reduction in uneven densities due to the discharge time difference between black ink and color inks, which occur particularly at both ends in a scanning range and which are caused by the printing by bidirectional scanning of print heads, and enables high image-quality printing to be realized. In this print apparatus, one band is divided into plural areas in a main scanning direction, the dot numbers of black ink and color ink imparted to respective areas are counted. If there are any areas where the dot numbers of both black and color exceed respective threshold values, the area number is counted, and if the number exceeds a predetermined number, the print mode is switched from bidirectional printing to a unidirectional one, upon determining that there is a high probability of occurrence of the above-described uneven densities.

    8.
    发明专利
    未知

    公开(公告)号：DE60228902D1

    公开(公告)日：2008-10-30

    申请号：DE60228902

    申请日：2002-01-30

    Applicant: CANON KK

    Inventor： TESHIGAWARA MINORU ,  OTSUKA NAOJI ,  SUGIMOTO HITOSHI ,  TAKAHASHI KIICHIRO ,  NISHIKORI HITOSHI ,  IWASAKI OSAMU ,  YAZAWA TAKESHI ,  CHIKUMA TOSHIYUKI

    IPC: B41J2/21

    Abstract: A printing apparatus can reduce degradation in print quality of a printed image, notably in a highlight portion or an intermediate gradation portion in the case where the image is printed by forming dots of a plurality of sizes. Specifically, data (C) and (SC) causing larger and smaller cyan ink droplets, respectively, to be ejected are independently subjected to a conversion to n-value process. Thus, the data (C) for larger ink droplets is present in a portion of printing data (128 or more) which corresponds to the highlight portion or intermediate gradation portion of the image. During printing, larger dots are formed in this area, thereby making it difficult to perceive possible stripes caused by the offset of the positions at which smaller dots impact a sheet.

    9.
    发明专利
    未知

    公开(公告)号：DE60323313D1

    公开(公告)日：2008-10-16

    申请号：DE60323313

    申请日：2003-10-02

    Applicant: CANON KK

    Inventor： TAKAHASHI KIICHIRO ,  IWASAKI OSAMU ,  TESHIGAWARA MINORU

    IPC: B41J2/05 ,  B41J2/07 ,  B41J2/21 ,  G06K15/10

    Abstract: The method involves generating printing data to be printed by each of two adjacent printing nozzle arrays on basis of tone information of image data to be printed. The printing data is generated in a range in which a sum of number of dots to be printed by two arrays does not exceed a predetermined number. Ink is discharged to a pixel of printing medium from the arrays on basis of the printing data generated. Independent claims are also included for the following: (a) an ink-jet printing apparatus (b) a program to control an ink-jet printing apparatus.

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