US 12,337,524 B2
Modifying print data near and/or at overlap areas between printhead dies
Yuval Eckstein, Sant Cugat del Valles (ES); Luis Garcia Garcia, Sant Cugat del Valles (ES); and Adrien Chiron, Sant Cugat del Valles (ES)
Appl. No. 17/417,728
Filed by Peridot Print LLC, Palo Alto, CA (US)
PCT Filed Aug. 27, 2019, PCT No. PCT/US2019/048239
§ 371(c)(1), (2) Date Jun. 23, 2021,
PCT Pub. No. WO2021/040693, PCT Pub. Date Mar. 4, 2021.
Prior Publication US 2022/0184879 A1, Jun. 16, 2022
Int. Cl. B29C 64/112 (2017.01); B29C 64/393 (2017.01); B41J 2/045 (2006.01); B41J 2/21 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/112 (2017.08) [B29C 64/393 (2017.08); B41J 2/04505 (2013.01); B41J 2/2146 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 16 Claims
OG exemplary drawing
 
1. A method performed by a processor and comprising:
receiving print data for an original calibration object to be printed by a printhead arrangement movable in a print direction and comprising a plurality of printhead dies, wherein adjacent printhead dies comprise an overlap area when viewed in the print direction;
generating print data for calibration objects by modifying the print data for the original calibration object to be printed near and/or at the overlap areas between printhead dies of the printhead arrangement to compensate for drop placement errors, by:
shifting the print data for the calibration object by a different number of pixels in or against the print direction, and/or
applying different masks defining different sizes and/or positions of the overlap area between the adjacent printhead dies to the print data for the original calibration object, and/or
using different halftone levels and/or shapes of drops to print additional drops behind a trailing edge and/or before a leading edge of the original calibration object;
printing the calibration objects using the generated print data;
determining a best calibration object of the printed calibration objects having fewest artifacts due to drop placement errors; and
using modifications associated with the best calibration object in subsequent print jobs.