Patent ID: 9108403
Filing Date: 2015-08-18
Classification: B41J

Abstract:
1. A printing apparatus provided with a print head including a plurality of nozzle groups each consisting of a plurality of nozzles, each of the plurality of nozzle groups applying ink having a plurality of volumes from the plurality of nozzles onto a print medium to form a plurality of dots including dots differing in size for printing, the printing apparatus comprising: an arrangement determination unit configured to determine an arrangement of dots to be formed in a unit area of the print medium according to a density of an image to be formed in the unit area by each of the plurality of nozzle groups; a size determination unit configured to determine sizes of the dots for printing determined by the arrangement determination unit, according to respective ejection characteristics of the plurality of nozzle groups, such that a ratio of the number of dots having a first size to the number of dots having a second size which is different from the first size in the case where the density of an image to be formed in the unit area is a first density and the ratio in the case where the density of an image to be formed in the unit area is a second density which is different from the first density are substantially the same; and an ejection control unit configured to control the print head to eject ink having the plurality of sizes determined by the size determination unit in positions of the print medium based on the arrangement determined by the arrangement determination unit.