发明名称 Printing apparatus, printing method and image processor
摘要 A printing apparatus and a printing method are provided which, even if a print position misalignment occurs between a plurality of print scans during a multipass printing, can minimize density variations in a unit area reliably and stably, thus producing an image without density unevenness. For this purpose, multi-grayscale-level image data is converted into a plurality of dot arrangement patterns that determine individual subpixels either to be printed or not to be printed with a dot. Then, these dot arrangement patterns are printed overlappingly on a print medium in different print scans of the print head. At this time, the plurality of dot arrangement patterns are so arranged that, if these dot arrangement patterns are shifted from one another, a change in the dot-overlapping area ratio will be smaller than when the dots are arranged separately so that they do not overlap one another.
申请公布号 US8287074(B2) 申请公布日期 2012.10.16
申请号 US20100732995 申请日期 2010.03.26
申请人 KANO YUTAKA;NISHIKORI HITOSHI;KAWATOKO NORIHIRO;KONNO YUJI;ISHIKAWA TOMOKAZU;YAMADA AKITOSHI;ONO MITSUHIRO;KAJIHARA RIE;CANON KABUSHIKI KAISHA 发明人 KANO YUTAKA;NISHIKORI HITOSHI;KAWATOKO NORIHIRO;KONNO YUJI;ISHIKAWA TOMOKAZU;YAMADA AKITOSHI;ONO MITSUHIRO;KAJIHARA RIE
分类号 B41J2/205;B41J2/145 主分类号 B41J2/205
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