| CPC B41J 2/2132 (2013.01) [B41J 2/2103 (2013.01); B41J 3/543 (2013.01)] | 13 Claims |
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1. An image forming apparatus comprising:
a liquid discharge device including a first nozzle group to an N-th nozzle group, where N represents an integer, each nozzle group including at least one nozzle row in which a plurality of nozzle orifices to discharge liquid of at least one type of process color for image formation is arranged in a sub-scanning direction orthogonal to a main scanning direction, the first nozzle group being arranged most upstream of the first nozzle group to the N-th nozzle group in the sub-scanning direction, a second nozzle group to the N-th nozzle group being arranged downstream from the first nozzle group in order in the sub-scanning direction such that the first nozzle group to the N-th nozzle group do not overlap with each other when viewed from the main scanning direction; and
processing circuitry configured to: during movement of the first nozzle group to the N-th nozzle group in the main scanning direction to form an image,
cause the first nozzle group to discharge the liquid in a first scan;
cause the second nozzle group adjacent to the first nozzle group to discharge the liquid in a second scan after the first scan; and
cause the N-th nozzle group adjacent to an (N−1)-th nozzle group to discharge the liquid in an N-th scan after the second scan to form a complete image in a predetermined image area of a recording medium after the N-th scan,
wherein the processing circuitry is configured to, with respect to an image completion rate indicating a rate of an image formed by each of the first nozzle group to the N-th nozzle group in the complete image, set the image completion rate of a portion of the first nozzle group adjacent to the second nozzle group in the sub-scanning direction to be equal to or smaller than the image completion rate of any one of the second nozzle group to the N-th nozzle group.
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