Printing apparatus, printing method, and program

摘要

A discharge amount of ink is corrected so that thinning rates of a discharge amount of ink to be discharged to an end portion on an upstream side in a scanning direction are larger than thinning rates of a discharge amount of ink to be discharged to an end portion on a downstream side in the scanning direction.

主权项

1. A printing apparatus comprising:
a printing head including a discharge port array which includes a plurality of discharge ports for discharging ink arranged in an array direction; a suction unit configured to suction air through suction holes so as to attract a printing medium; a scanning unit configured to cause the printing head to perform a plurality of scanning operations relative to the printing medium in a scanning direction which is orthogonal to the array direction; a supporting unit which includes the suction holes formed therein in a range having a width in the scanning direction larger than a width of the printing medium in the scanning direction and which is configured to support the printing medium; a conveying unit configured to convey the printing medium in a conveyance direction crosses the scanning direction relative to the printing head such that a predetermined number of first discharge ports arranged in one end portion of the discharge port array in the array direction in a first scanning operation in the plurality of scanning operations and a predetermined number of second discharge ports arranged in the other end portion in the discharge port array in the array direction in a second scanning operation which is performed after the first scanning operation in the plurality of scanning operations performed by the printing head discharge ink in the same region or substantially the same region in the printing medium; an obtaining unit configured to obtain information on discharge amounts of ink discharged on the printing medium in the individual scanning operations; a correction unit configured to perform correction by reducing a discharge amount of ink discharged from the predetermined number of first discharge ports in the first scanning operation and a discharge amount of ink discharged from the predetermined number of second discharge ports in the second scanning operation which are represented by the information obtained by the obtaining unit using reduction rates in accordance with a position of the printing head in the scanning direction; and a controller configured to perform control such that ink is discharged in accordance with a discharge amount of ink corrected by the correction unit, wherein, as for the discharge amount of ink discharged from the predetermined number of first discharge ports in the first scanning operation, the reduction rates in a case where the printing head is located in a first position in the scanning direction are larger than the reduction rates in a case where the printing head is located in a second position in the scanning direction which is on a downstream side in the scanning direction in the first scanning operation relative to the first position.