US 11,772,376 B2
Sub-row firing method for single-pass monochrome printing at high speeds
Julie Catherine Hogan, Dublin (IE); Ronan Palliser, Dublin (IE); John Sheahan, North Ryde (AU); Brian Brown, North Ryde (AU); Caitriona Forbes, Dublin (IE); and Pat Lehane, Dublin (IE)
Assigned to Memjet Technology Limited, Dublin (IE)
Filed by Memjet Technology Limited, Dublin (IE)
Filed on Sep. 7, 2021, as Appl. No. 17/467,909.
Claims priority of provisional application 63/076,043, filed on Sep. 9, 2020.
Prior Publication US 2022/0072850 A1, Mar. 10, 2022
Int. Cl. B41J 2/045 (2006.01)
CPC B41J 2/04505 (2013.01) [B41J 2/04541 (2013.01); B41J 2/04573 (2013.01); B41J 2/04586 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of printing an image from a printhead module having a plurality of horizontal ink planes M supplied with a same ink, each ink plane having at least one nozzle row, the nozzles rows of all ink planes having vertically aligned nozzles, the method comprising the steps of:
defining contiguous span groups along each nozzle row, each span group containing N nozzles;
allocating dot data for each image line of the image to a predetermined number of nozzles P in each span group of each nozzle row;
sending the dot data to the printhead module and firing nozzles, based on the dot data, sequentially from each of the M ink planes to print the image line of the image such that all ink planes contribute dots to the printed image line,
wherein:
only one nozzle from each span group in a same nozzle row is fired simultaneously;
N is an integer multiple of M; and
P is N divided by M.