Patent ID: 7690750

Claim:
A printing apparatus for forming an image by bidirectional scanning of a printing element array in a direction intersecting a conveying direction of a printing medium, the printing element array including a plurality of printing elements arranged in the conveying direction each of which discharges an ink on the printing medium, comprising: means for obtaining a first adjustment value for adjusting a relative displacement between a printing position of forward scanning and a printing position of backward scanning and a second adjustment value for adjusting a displacement of a printing position due to an inclination of the printing element away to the conveying direction; correcting means for correcting the first adjustment value in response to a direction of the inclination of the printing element array only in case the absolute value of the second adjustment value is larger than a predetermined value which is other than zero; and means for adjusting the relative displacement and the displacement of the printing position caused by the inclination of the printing element array based on the first adjustment value corrected by said correcting means and the second adjustment value.