Patent ID: 8215748

Claim:
An ink-jet recording device comprising: a recording head, for ejecting an ink onto a recording medium, configured with a first group of nozzles and a second group of nozzles positioned at an end portion of the recording head, each of the first and second groups of nozzles being provided with a plurality of nozzles arranged in rows along a vertical scanning direction; a horizontal scanning device which causes the recording head to scan in a horizontal scanning direction perpendicular to the vertical scanning direction; and a vertical scanning device which causes at least one of the recording medium or the recording head to relatively scan in the vertical scanning direction by a predetermined amount of movement M; wherein the ink-jet recording device alternately executes the horizontal scanning by the horizontal scanning device and the vertical scanning by the vertical scanning device, and by multiple times of the horizontal scanning and the vertical scanning, forms a band with a width corresponding to the predetermined amount of movement M by the first group of nozzles, to record on the recording medium, wherein the horizontal scanning device executes (n+1) times of scanning for forming one band, in cases where a required number of scanning times for forming the one band is n, and the relations L=M×(n+1)+α, and M>α are satisfied, where L is a row length of all the nozzles, and α is a row length of the second group of nozzles, and the ink-jet recording device further comprises a controller which causes the second group of nozzles to execute recording at the time of horizontal scanning of {(n+1)+l}th and beyond, and the controller allocates recording data to each of the nozzles so that a border of a region recorded by the horizontal scanning of the second group of nozzles on an upstream side of the relative vertical scanning direction of the recording head relative to the recording medium is formed in an intermediate portion of the width of the one band formed by the first to (n+1)th horizontal scanning.