US 11,685,151 B2
Method and device for ascertaining print data for an inkjet printing device
Florian Hitzlsperger, Poing (DE); Jochen Reinders, Isen (DE); Ulrich Stöckle, Munich (DE); and Eva Pichlmeier, Munich (DE)
Assigned to Canon Production Printing Holding B.V., Venlo (NL)
Filed by Canon Production Printing Holding B.V., Venlo (NL)
Filed on Jul. 30, 2021, as Appl. No. 17/389,822.
Claims priority of application No. 102020120482.5 (DE), filed on Aug. 4, 2020.
Prior Publication US 2022/0040972 A1, Feb. 10, 2022
Int. Cl. B41J 29/393 (2006.01); B41J 2/045 (2006.01); G06K 15/10 (2006.01); G06K 15/02 (2006.01); G06K 15/00 (2006.01)
CPC B41J 2/0451 (2013.01) [B41J 2/04573 (2013.01); B41J 2/04581 (2013.01); G06K 15/102 (2013.01); G06K 15/1823 (2013.01); G06K 15/1825 (2013.01); G06K 15/1836 (2013.01); G06K 15/1842 (2013.01); G06K 15/408 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A device for ascertaining print data for a print image to be printed by a print bar of an inkjet printing device, the print bar including one or more nozzles and the print data indicates, for a plurality of dots of the print image, a respective ink quantity that is to be ejected by a respective nozzle of the one or more nozzles of the print bar, the device comprising:
a communication interface configured to receive the print data; and
processing circuitry that is configured to:
ascertain, based on the print data, a time curve of an ink flow quantity of ink that, during the printing of the print image, flows in the print bar and/or is ejected from the one or more nozzles of the print bar;
determine, based on the time curve of the ink flow quantity, whether an ink ejection error will be produced by at least one nozzle of the one or more nozzles during the printing of the print image due to changes of the ink flow quantity; and
adapt the print data for the print image to be printed based on the determination.