Inkjet recording device capable of controlling ejection timing of each nozzle individually

An ejection device comprising:

• a head formed with a plurality of nozzles arranged in a row for selectively ejecting droplets from the nozzles so as to form dots onto a medium;
• a transporting means for transporting the medium relative to the head in a first direction;
• a resolution specifying means for specifying a resolution with respect to the first direction;
• a preciseness specifying means for specifying preciseness in dot locations on the medium;
• an angle specifying means for specifying an angle of the head with respect to a second direction perpendicular to the first direction based on the specified resolution;
• a sub-pixel determining means for determining a size of a sub-pixel with respect to the first direction based on the specified preciseness;
• a converting means for converting an ejection data to a sub-pixel data based both on the specified resolution and the size of the sub-pixel;
• and
• a control means for controlling the head based on the sub-pixel data to selectively ejecting the droplets from the nozzles.