Printing apparatus and method of processing printing data

摘要

A printing apparatus, comprising a driving unit for driving a printhead including a plurality of nozzles each of which prints a dot, a conveying unit for conveying a printing medium, a memory and a unit, wherein the plurality of nozzles are arranged to form nozzle arrays adjacent to each other, the unit performs a first operation for developing printing data column by column on the memory, a second operation for assigning the printing data to each nozzle array, and a third operation for controlling the driving unit based on the assigned printing data, and, after the first operation and before the second operation, the unit specifies a portion of the printing data corresponding to a dot deviated from a correct printing region due to a tilt of the nozzle arrays and rearranges the portion.

主权项

1. A printing apparatus comprising:
a driving unit configured to drive a printhead including a plurality of nozzles formed into an array in a predetermined direction such that each nozzle of the printhead forms a dot on a printing medium, while scanning the printhead in a first direction intersecting the predetermined direction with respect to the printing medium,
wherein the plurality of nozzles are arranged such that nozzles for printing dots of the same color form two or more nozzle arrays adjacent to each other in the first direction; a memory configured to store printing data; a data processing unit configured to perform
a first operation for developing printing data column by column on the memory, anda second operation for assigning the printing data on the memory to each nozzle array; and a controlling unit configured to control the driving unit to print dots on the printing medium by using the nozzles of each nozzle array, based on the assigned printing data, wherein the data processing unit further performs, after the first operation and before the second operation,
an operation for specifying, in a case where printing is performed by assigning, to each nozzle array, the printing data of each column developed on the memory in the first operation, a portion of the printing data, which corresponds to a dot whose printing position is deviated from a region corresponding to the column of the printing data due to a tilt of the two or more nozzle arrays with respect to a direction perpendicular to the first direction, based on the tilt of the two or more nozzle arrays, andan operation for changing, on the memory, the printing data developed on the memory, such that the specified portion is shifted by a column corresponding to the tilt of the two or more nozzle arrays.