Patent ID: 6997541
Filing Date: 2006-02-14
Classification: B41J

Abstract:
1. A print position adjusting method of using a print head having a plurality of arranged nozzles from which ink is ejected to a print medium, to perform alternately a printing operation of scanning the print head in a predetermined direction different from a direction in which the plurality of nozzles are arranged, to eject ink from the nozzles to a print medium during the scan, and a paper feeding operation of effecting relative movement of the print medium and the print head a distance corresponding to a predetermined movement pitch in a direction different from the predetermined direction of scanning of the print head, the print head being scanned over the print medium by reciprocating in the predetermined direction, to enable bidirectional printing in which the printing operation is performed during both a forward scan and a backward scan, said method comprising: a mode providing step of providing a plurality of print modes having different dot arrangements for a scan of the print head; a mode selecting step of selecting one of the plurality of print modes; a determining step of determining an adjustment value that varies a drive timing for the plurality of nozzles between the forward scan and the backward scan in accordance with the print mode selected in said mode selecting step; and a printing step of performing the printing operation using the drive timing for the nozzles determined on the basis of the adjustment value determined in said determining step.