Patent ID: 8033632
Filing Date: 2011-10-11
Classification: B41J

Abstract:
1. A method for adjusting ejection timing comprising: forming an adjustment pattern including a plurality of first patterns and a plurality of second patterns on a medium by changing a relative position between first and second nozzle rows and the medium in an intersecting direction that intersects a row direction in which nozzles of the first nozzle row and the second nozzle row are lined up and gradually changing an ejection interval between formation of the first patterns by electing liquid droplets from the first nozzle row and formation of the second patterns by ejecting liquid droplets from the second nozzle row, the first nozzle row and the second nozzle row being arranged parallel to each other and being separated from each other in the intersecting direction; and determining an adjustment amount of ejection timing of the first nozzle row and the second nozzle row based on the adjustment pattern, wherein, with the gradually changing election interval being maintained, a plurality of the adjustment patterns are formed with a separation of a predetermined distance in the intersecting direction between each other, and the ejection timing is adjusted based on an average of adjustment amounts determined based on the adjustment patterns.