| 摘要 |
Efficient printing of data including two types of areas in the sub-scanning direction, a color area and a monochromatic area, are present. During monochromatic mode printing, in the event that (1) the lowermost main scan lines of the achromatic unit band enter the color areas, assuming that J iterations of the color mode sub-scan (feed quantum Sc<Sm) are to be executed instead of the color mode sub-scan (feed amount Sm); and also (2) the lowermost main scan lines of the achromatic unit band do not enter the color areas, assuming that (J-1) iterations of the color mode sub-scan are to be executed next; a specific positioning feed is executed and dots are formed in the monochromatic areas by executing one unit scan operation. Subsequently a transition is made to color mode printing. The feed amount of the positioning feed is the product of (J-1) multiplied by the color mode sub-scan feed amount Sc.
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