| 摘要 |
A nozzle use range and a nozzle nonuse range are set in nozzles of a print head. In a forward direction printing in the first pas, printing is performed by the use nozzles thus set. After the first pass is performed, a print medium is conveyed by a nozzle arrangement length of the nozzle nonuse range in a conveyance direction. Along with it, the nozzle use range and the nozzle nonuse range for the second pass are set by shifting the nozzle use range. The backward direction printing in the second pass is performed in the nozzle use range thus set. Printing in an area having a width equivalent to a nozzle arrangement length of the use nozzles can be completed by the two passes in the forward and backward directions. A raster in the area to be printed is printed by the two different nozzles.
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