Inkjet printing apparatus and inkjet printing method

摘要

In a serial type of color inkjet printing apparatus having a plurality of nozzle arrays, overlapping areas are provided in the respective operating nozzle areas, but printing of a high-quality image can be achieved without color banding and gloss variations accompanying non-uniformity in the ink application process. To attain this, while the operating nozzle areas of the plurality of nozzle arrays partially overlap with each other, the overlapping area of the operating nozzle area of each nozzle array is set to be equal to an integral multiple of the amount of conveyance. In consequence, the ink application process for the entire image area is made uniform.

主权项

1. An inkjet printing apparatus, which prints an image on a print medium by performing, in alternate order, a printing scan in which a plurality of nozzle arrays each including a plurality of nozzles arranged in a predetermined direction are moved relative to the print medium, and a conveying operation of conveying the print medium in the predetermined direction, comprising:
a setting unit configured to set an operating nozzle area, operated for printing to a middle region of the print medium, for each of the plurality of nozzle arrays; a unit configured to execute the printing scan by moving the plurality of nozzle arrays in a direction crossing the predetermined direction while ink is ejected from the operating nozzle areas set by the setting unit; and a unit configured to execute the conveying operation of conveying the print medium in the predetermined direction by an amount of conveyance determined depending on a set print mode, wherein the setting unit sets the operating nozzle area for each of the plurality of nozzle arrays such that an overlapping area, in the predetermined direction, of the operating nozzle areas of the plurality of nozzle arrays is an integral multiple of the amount of conveyance.