| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a printing quality of image by suppressing a birth of banding. Ž<P>SOLUTION: Inkjet heads 7a, 7b installed in a head unit 6 are arranged so that nozzle trains 8 located in a line along with the conveyance direction B, respectively, and each of nozzle trains 8 may overlap in part in the conveyance direction B. A control part which matches printing data with the effective nozzle of inkjet heads 7a, 7b fluctuates a knot of printing data in the conveyance direction B along the main scan direction A and matches it with the effective nozzle of inkjet heads 7a, 7b. Thereby, since the knot of print image formed by each of inkjet heads 7a, 7b can be diffused in the conveyance direction B, the printing quality of image can be improved by suppressing the birth of banding. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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