Controller, printer, and computer-readable storage medium

A printer comprising:

• a print execution engine including a print head having a plurality of nozzles for ejecting ink, a head driver configured to cause the print head to eject ink to form dots on a print medium, and a conveyer configured to convey the print medium with respect to the print head in a conveying direction;
• and
• a controller configured to control the print execution engine, the controller including a print controller configured to cause the print execution engine to print a print image by causing the print execution engine to, using target image data, convey the print medium with the conveyer and execute a plurality of partial printings in which the print head forms the dots,
• wherein the print controller is configured to:
• cause the print execution engine to execute a first partial printing;
• and
• cause the print execution engine to execute a second partial printing,
• wherein, on the print medium, defined are a first target range and a second target range, the first target range being a print target range in the conveying direction on which printing is to be performed by the first partial printing and the second target range being a print target range in the conveying direction on which printing is to be performed by the second partial printing, the first and second target ranges forming an overlapping range in which edge portions of the first target range and the second target range overlap each other,
• wherein the first target range includes a first non-overlapping range that does not overlap the second target range,
• wherein the second target range includes a second non-overlapping range that does not overlap the first target range,
• wherein the print controller is configured to execute generating print data based on pieces of non-overlapping range data of the target image data corresponding to the first and second non-overlapping ranges and on overlapping range data of the target image data corresponding to the overlapping range, and output the print data to cause the print execution engine to print images in the first and second non-overlapping ranges and an image in the overlapping range,
• wherein the generating the print data includes increasing a density of the image of the overlapping range as compared with a density of the entire image of the first non-overlapping range and as compared with a density of the entire image of the second non-overlapping range.

A non-transitory computer-readable storage medium storing computer-readable instructions configured to, when executed by a controller configured to control a print execution engine including a print head having a plurality of nozzles configured to eject ink, a head driver configured to cause the print head to eject ink to form dots on a print medium, and a conveyer configured to convey the print medium with respect to the print head in a conveying direction, the controller comprising a print controller configured to cause the print execution engine to print a print image by causing the print execution engine to, using target image data, convey the print medium with the conveyer and execute a plurality of partial printings in which the print head forms the dots, cause the print controller to:

• cause the print execution engine to execute a first partial printing;
• and
• cause the print execution engine to execute a second partial printing,
• wherein, on the print medium, defined are a first target range and a second target range, the first target range being a print target range in the conveying direction on which printing is to be performed by the first partial printing and the second target range being a print target range in the conveying direction on which printing is to be performed by the second partial printing, the first and second target ranges forming an overlapping range in which edge portions of the first target range and the second target range overlap each other,
• wherein the first target range includes a first non-overlapping range that does not overlap the second target range,
• wherein the second target range includes a second non-overlapping range that does not overlap the first target range,
• wherein the print controller is caused to execute generating print data based on pieces of non-overlapping range data of the target image data corresponding to the first and second non-overlapping ranges and on overlapping range data of the target image data corresponding to the overlapping range, and output the print data to cause the print execution engine to print images in the first and second non-overlapping ranges and an image in the overlapping range,
• wherein the generating the print data includes increasing a density of the image of the overlapping range as compared with a density of the entire image of the first non-overlapping range and as compared with a density of the entire image of the second non-overlapping range.