Patent ID: 9010895
Filing Date: 2015-04-21
Classification: B41J

Abstract:
1. An ink jet printing apparatus comprising: an ink jet head including a plurality of head units each having a plurality of nozzle arrays arranged, each of which has a plurality of nozzles arranged at a predetermined pitch in a nozzle arrangement direction and which is configured to eject color inks different from one another from the nozzles, the plurality of head units being arranged in the nozzle arrangement direction; and a controller configured to control the ink jet head, wherein in each of the head units, at least one of the plurality of nozzle arrays is arranged so that a position of each of the nozzles is shifted in the nozzle arrangement direction relative to at least one of the other nozzle arrays, and wherein the controller determines a correspondence relationship among nozzles in the plurality of nozzle arrays in each of the plurality of head units so that a positional relationship among nozzles corresponding to the same pixel in each of the plurality of nozzle arrays becomes the same in all of the plurality of head units irrespective of a positional relationship among nozzles having the same number in order from one side in the nozzle arrangement direction in the plurality of nozzle arrays in each of the plurality of head units.