Printing apparatus and driving control method for printhead

A printing apparatus including a printhead for printing on a printing medium, and a print control unit,

• the printhead including at least two nozzle arrays configured to print dots on the printing medium, having the same length, and arranged in a first direction, and each nozzle array including a plurality of nozzles arranged along a second direction intersecting the first direction,
• wherein the print control unit performs
• a first operation of expanding print data onto a memory in correspondence with the first direction and the second direction,
• a second operation of, in each nozzle array for every unit column data corresponding to the second direction in the print data expanded in the first operation, selecting some of the plurality of nozzles as non-driving nozzles so the nozzles do not overlap each other between the nozzle arrays in the first direction, and the remaining nozzles of the plurality of nozzles as driving nozzles, and
• a third operation of distributing the print data expanded in the first operation to the nozzle arrays so that printing of dots corresponding to each unit column data is completed by printing dots corresponding to the driving nozzles of each nozzle array selected in the second operation by the driving nozzles and printing dots corresponding to the non-driving nozzles of each nozzle array selected in the second operation by the driving nozzles of another nozzle array selected in the second operation.