Patent ID: 6749279
Filing Date: 2004-06-15
Classification: B41J

Abstract:
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.