Printing apparatus and correction method therefor

A printing apparatus comprising:

• at least one printhead including a plurality of chips, each including a plurality of nozzle arrays which are arranged in a predetermined nozzle array direction and each of which is formed from a plurality of nozzles and energy generation elements provided in correspondence with the nozzles of each nozzle array and each configured to generate energy to be used to discharge ink;
• a driving unit configured to sequentially drive print elements corresponding to nozzles of each of a plurality of groups into which the plurality of nozzles of each nozzle array included in the printhead are divided by setting nozzles successive in the nozzle array direction as one group;
• and
• a moving unit configured to move the printhead in a direction intersecting the nozzle array direction based on input relating to a slant of the printhead to correct the slant of the printhead.

A printing apparatus comprising:

• at least one printhead including a plurality of chips, each including a plurality of nozzle arrays which are arranged in a predetermined nozzle array direction and each of which is formed from a plurality of nozzles and energy generation elements provided in correspondence with the nozzles of each nozzle array and each configured to generate energy to be used to discharge ink, wherein energy generation elements corresponding to nozzles of each of a plurality of groups into which the plurality of nozzles of each nozzle array included in the printhead are divided by setting nozzles successive in the nozzle array direction as one group are driven so as to print an image on a print medium;
• a reading unit configured to read a predetermined test pattern printed on a print medium by the printhead;
• an analysis unit configured to analyze the test pattern read by the reading unit;
• and
• a calculation unit configured to calculate a slant of the printhead with respect to a reference based on a result of the analysis by the analysis unit,
• wherein the calculation unit is configured to further calculate a printing shift between chips based on the result of the analysis by the analysis unit, and
• the printing shift between the chips is corrected by changing a timing of driving each nozzle included in each chip with respect to a reference line for the slant of the printhead calculated by the calculation unit.