Sughrue Mion, PLLC
Printing system, printing method, and adjustment method
A printing system includes a head, a carry unit, a memory, and a controller. The head has nozzles and ejects ink droplets corresponding to pixel data from each of the nozzles. The carry unit carries a medium. The memory stores position information that indicates a relationship between a position of a dot to be formed by an ink droplet ejected according to the pixel data and a position of a pixel on the medium corresponding to that pixel data. The controller alternately repeats a dot formation operation of causing ejection of the ink droplets from the nozzles which move in a movement direction to form the dots in the movement direction, and a carrying operation of causing the carry unit to carry the medium, to print an image on the medium. When forming a row of dots lined up in the movement direction with a predetermined number of at least two nozzles by repeating the dot formation operation of forming dots at a predetermined pitch in the movement direction and shifting the positions, in the movement direction, of the dots formed in each dot formation operation, the controller divides a plurality of pieces of the pixel data that correspond to a plurality of the pixels lined up in the movement direction into groups of a number equal to the predetermined number, assigns, based on the position information, one of the predetermined number of groups to each of the dot formation operations that are repeated, and, in each dot formation operation, causes ejection of the ink droplets based on the pixel data included in the group that has been assigned.
Seiko Epson Corporation
B
B41J
inventional
Hidekazu
Mizuno