Patent ID: 7296877

Claim:
An ink jet printing apparatus for printing an image on a print medium by using a print head having a first nozzle group including a plurality of first nozzle lines capable of ejecting ink and a second nozzle group including a plurality of second nozzle lines capable of ejecting ink, wherein the image is formed in a first drive mode and a second drive mode, the first drive mode driving only one of the first and second nozzle groups during one scan of the print head, the second drive mode driving the first and second nozzle groups at different timings during one scan of the print head, the ink jet printing apparatus comprising: adjust value retrieving means for retrieving a first drive mode adjust value, the first drive mode adjust value being used to adjust a relative print position between the first nozzle lines in the first drive mode; and adjust value setting means for setting a second drive mode adjust value based on the first drive mode adjust value, the second drive mode adjust value being used to adjust a relative print position between the first nozzle lines and between the second nozzle lines in the second drive mode, wherein in the second drive mode, the first nozzle group is driven at one of odd-numbered column positions and even-numbered column positions and the second nozzle group is driven at the other column positions, the second drive mode adjust value includes a correction value corresponding to a position deviation between landing positions of inks ejected from the first and second nozzle groups positioned at the same column position, the correction value being set by said adjust value setting means based on the first drive mode adjust value, and said adjust value setting means corrects the correction value depending on whether the correction value is odd or even so that the first nozzle group is driven at one of odd-numbered column positions and even-numbered column positions and the second nozzle group is driven at the other column positions in the second drive mode.