Patent ID: 7390072

Claim:
An ink-jet printing method of printing on a printing medium by using a printhead having at least a first printing nozzle array and a second printing nozzle array adjacent to the first printing nozzle array, each printing nozzle array having a plurality of printing nozzles for printing dots, comprising: a generation step of generating printing data indicative of the dots to be printed to a predetermined region of the printing medium by the first and second printing nozzle arrays on the basis of tone information of image data corresponding to the predetermined region; and a printing step of printing the dots to the predetermined region by the first and second printing nozzle arrays on the basis of the printing data generated in the generation step, wherein in the generation step, the printing data indicative of the dots to be printed by at least one of the first and second printing nozzle arrays is generated in a range in which a sum of a number of at least one dot to be printed by the first printing nozzle array and a number of at least one dot to be printed by the second printing nozzle away does not exceed a predetermined number, and wherein a size of the dot printed by the first printing nozzle array is larger than a size of the dot printed by the second printing nozzle array.