Patent ID: 7717534

Claim:
A printing apparatus for printing an image on a print medium by using a print head which ejects ink from a plurality of nozzles, the plurality of nozzles being divided into a plurality of blocks, and usage history of the print head being managed for each of the blocks, the printing apparatus comprising: counting means for counting the number of pixels printed by the plurality of nozzles for each of the blocks; management means for accumulating, for each of the blocks on the basis of the number counted by the counting means, the number of pixels printed by a nozzle in each of the blocks which prints a maximum number of pixels in a predetermined printing operation and managing the accumulated number for each of the blocks, the number of pixels printed by another nozzle in each of the blocks which does not print the maximum number of pixels not being accumulated; and outputting means for outputting an error information on the basis of data concerning the accumulated number for each of the blocks which are managed by the managing means, wherein the outputting means outputs the error information when at least one of the data concerning the accumulated numbers for each of the blocks exceeds a reference value.