Printing apparatus

A printing apparatus comprising:

• a print execution section and a controller,
• wherein the print execution section includes:
• a printing head having a plurality of nozzles from which ink is discharged, the nozzles having different positions in a sub-scan direction;
• a main-scan section configured to execute main-scan to move the printing head along a main-scan direction, which intersects with the sub-scan direction, relative to a printing medium;
• and
• a sub-scan section configured to execute sub-scan to move the printing medium along the sub-scan direction relative to the printing head,
• wherein the controller is configured to:
• obtain object image data indicating an object image formed by a plurality of pixels,
• generate a plurality of pieces of partial printing data by processing the object image data in an order from a downstream side toward an upstream side in the sub-scan direction, and
• cause the print execution section to execute, a plurality of times, the sub-scan and partial printing in which the ink is discharged from the printing head during the main-scan by use of the pieces of partial printing data,
• the object image includes a specified portion, a downstream portion positioned downstream of the specified portion in the sub-scan direction, and an upstream portion positioned upstream of the specified portion in the sub-scan direction,
• the partial printing executed the plurality of times includes first partial printing and second partial printing, the first partial printing being executed by use of first partial printing data from among the pieces of partial printing data, the second partial printing being executed after the first partial printing by use of second partial printing data from among the pieces of partial printing data,
• the controller is configured to determine whether the specified portion satisfies a specifying condition, not using data included in the object image data and corresponding to the specified portion but using data included in the object image data and corresponding to the downstream portion,
• in a case that the controller has determined that the specified portion does not satisfy the specifying condition, the controller is configured to:
• generate the first partial printing data and the second partial printing data such that at least a part of the downstream portion is printed by the first partial printing, at least a part of the upstream portion is printed by the second partial printing, and the specified portion is printed by the first partial printing and the second partial printing, and
• set a conveyance amount of the sub-scan between the first partial printing and the second partial printing to a first amount,
• in a case that the controller has determined that the specified portion satisfies the specifying condition, the controller is configured to:
• generate the first partial printing data and the second partial printing data such that at least a part of the downstream portion is printed by the first partial printing, at least a part of the upstream portion is printed by the second partial printing, and the specified portion is printed by the first partial printing and is not printed by the second partial printing, and
• set the conveyance amount of the sub-scan between the first partial printing and the second partial printing to a second amount that is larger than the first amount.