Patent ID: 7806497

Claim:
A printing apparatus that prints an image by ejecting ink from nozzles onto a medium that is transported in a transporting direction, the printing apparatus comprising: a) a first print head, mounted on a carriage moving in a carriage movement direction during printing, provided with a plurality of nozzle rows for respective colors of the ink, each of the plurality of nozzle rows including nozzles which are arranged in a row along the transporting direction; b) a second print head mounted on the carriage and provided with a plurality of nozzle rows for respective colors of the ink, a section of the each nozzle row of the second print head overlapping a section of the each nozzle row of the first print head to form an aligned nozzle section along the carriage movement direction and wherein the each nozzle row of the second print head at most partially overlaps the each nozzle row of the first print head in the carriage movement direction; c) a memory that stores information about a number of nozzles in each of the aligned nozzle sections for each color of the ink; and d) a controller that controls a timing at which the ink is ejected from the first and second print heads based on the information about the number of nozzles in each of the aligned nozzle sections.