Patent ID: 8113615

Claim:
A controller for controlling an inkjet recording device, the inkjet recording device having nozzles through which ink droplets are ejected toward a printing medium, by outputting instructions to the inkjet recording device to eject ink droplets so that the size of dots formed when the ejected ink droplets impact the printing medium is a prescribed size based on print data, the controller comprising: a processor configured to execute computer-readable instructions as units; and a memory configured to store computer-readable instructions that, when executed, provide: an ejection instructing unit that outputs instructions to the inkjet recording device in order that the size of dots formed by ink droplets ejected from a first nozzle is greater than the prescribed size, the first nozzle being at least one of two nozzles located next to each other, wherein first positions of the first dots formed on the printing medium by the first nozzle are shifted from aimed dot positions in a direction away from second positions of second dots formed by the other of the two nozzles such that a first pitch between the first positions and the second positions is greater than a prescribed pitch, wherein the ejection instructing unit further outputs instructions to the inkjet recording device to eject ink droplets from a second nozzle for forming third dots of a smaller size than the prescribed size in the print data, the second nozzle being located next to the first nozzle, and wherein a second pitch between the first positions of the first dots formed by the first nozzle and third positions of the third dots formed by the second nozzle is smaller than the prescribed pitch.