Inkjet printing apparatus and inkjet printing method

An inkjet printing apparatus for printing an image by ejecting ink comprising:

• a print head in which a plurality of nozzle arrays, in each of which a plurality of nozzles for ejecting ink are arranged in a predetermined direction, are arranged in a direction crossing the predetermined direction;
• a scanning unit configured to perform scanning of the print head in a first direction crossing the predetermined direction and in a second direction which is opposite to the first direction, while causing the print head to eject ink;
• an adjusting unit configured to adjust an amount of the ink ejection from a first nozzle unit which includes a predetermined number of nozzles arranged in one of end positions in the predetermined direction of a first nozzle array, wherein the first nozzle array is arranged in a position where an air stream flowing between the print head and a print medium at a time of causing the print head to scan in the first direction is stronger than an air stream flowing between the print head and the print medium at a time of causing the print head to scan in the second direction;
• and
• a control unit configured to control the print head so as to eject ink from the first nozzle unit according to the amount of the ink ejection adjusted by the adjusting unit, wherein
• the adjusting unit adjusts the amount of ink ejection from the first nozzle unit such that amount of ink ejection from the first nozzle unit in a case that the scanning unit performs scanning by the print head in the first direction is smaller than amount of ink ejection from the first nozzle unit in a case that the scanning unit performs scanning by the print head in the second direction.

An inkjet printing method for printing an image by ejecting ink comprising:

• a scanning step for causing a print head, in which a plurality of nozzle arrays, in each of which a plurality of nozzles for ejecting ink are arranged in a predetermined direction, are arranged in a direction crossing the predetermined direction, to scan in a first direction crossing the predetermined direction and in a second direction which is opposite to the first direction while causing the print head to eject ink;
• an adjusting step for adjusting an amount of the ink ejection from a first nozzle unit which includes a predetermined number of nozzles arranged in one of end positions in the predetermined direction of a first nozzle array, wherein the number of nozzle arrays arranged at a side of the first direction from the first nozzle array in the plurality of nozzle arrays is less than the number of nozzle arrays arranged at a side of the second direction from the first nozzle array in the plurality of nozzle arrays;
• and
• a control step for controlling the print head so as to eject ink from the first nozzle unit according to the amount of the ink ejection adjusted in the adjusting step, wherein
• in the adjusting step, the amount of the ink ejection from the first nozzle unit is adjusted such that amount of ink ejection from the first nozzle unit in the scan of the first direction is smaller than amount of ink ejection from the first nozzle unit in the scan of the second direction.