Patent ID: 7350893

Claim:
An inkjet printing method for printing an image on a print medium by ejecting ink droplets from a print head on the basis of print data while moving the print head in a direction crossing a predetermined direction, the print head comprising at least a first nozzle array having a plurality of nozzles which are arranged in the predetermined direction and a second nozzle array having a plurality of nozzles which are arranged in the predetermined direction, a color of a first ink droplet ejected from the first nozzle array being the same color as a second ink droplet ejected from the second nozzle array and an amount of ink ejected in the first ink droplet from the first nozzle array being less than an amount ejected in the second ink droplet from the second nozzle array, the method comprising the steps of: specifying one of a plurality of print modes including a first print mode in which the print head is moved at a first moving speed in order to print the image on the print medium and a second print mode in which the print head is moved at a second moving speed faster than the first moving speed in order to print the image on the print medium; and converting input image data into the print data corresponding to each of the first and second nozzle arrays so that the maximum number of first ink droplets ejected per unit area of the print medium is smaller when the second print mode is specified than when the first print mode is specified and so that when either of the first print mode or the second print mode is specified, the first ink droplets are not ejected to the unit area where the number of ejected second ink droplets is at a maximum.