Patent ID: 9457586
Filing Date: 2016-10-04
CPC Classification: B41J

Claim Text:
1. A printing apparatus comprising: a print unit including a first array of a plurality of first ejection openings for ejecting a liquid of a predetermined color and being arrayed in a predetermined direction and a second array of a plurality of second ejection openings for ejecting the liquid of the predetermined color and being arrayed in the predetermined direction, the first array and the second array being arranged in a scan direction crossing the predetermined direction, wherein when relative movement between the print unit and a print medium is effected in at least one scan direction crossing the predetermined direction, the liquid of the predetermined color is ejected from the plurality of first ejection openings and the plurality of second ejection openings at a predetermined relative timing between the plurality of first ejection openings and the plurality of second ejection openings; a pattern printing unit configured to cause the print unit to print a pattern on a print medium by ejecting the liquid of the predetermined color from the plurality of first ejection openings and the plurality of second ejection openings during the relative movement in a predetermined one scan direction crossing the predetermined direction; a storage unit configured to store information regarding relative deviation between print positions by the plurality of first ejection openings and print positions by the plurality of second ejection openings in the relative movement in the predetermined one scan direction, the information being based on the printed pattern; and a print control unit configured to control a printing operation for printing an image on a print medium using the print unit according to the stored information so as to adjust relative ejection timings between ejection timings from the plurality of first ejection openings and ejection timings from the plurality of second ejection openings in the relative movement in the predetermined one scan direction for printing on the printing medium.