US 11,654,678 B2
Nozzle characteristics
Craig Olbrich, Corvallis, OR (US); and Joseph M Torgerson, Corvallis, OR (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 16/483,084
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
PCT Filed Apr. 6, 2017, PCT No. PCT/US2017/026297
§ 371(c)(1), (2) Date Aug. 2, 2019,
PCT Pub. No. WO2018/186862, PCT Pub. Date Oct. 11, 2018.
Prior Publication US 2020/0114646 A1, Apr. 16, 2020
Int. Cl. B41J 2/07 (2006.01); B41J 2/045 (2006.01); B41J 2/125 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/072 (2013.01) [B41J 2/04563 (2013.01); B41J 2/125 (2013.01); B41J 2002/14354 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fluid ejection device comprising:
a fluid ejection die comprising a plurality of nozzles to eject fluid drops, the fluid ejection die further comprising a plurality of temperature sensors disposed thereon to sense temperatures associated with nozzles of the plurality of nozzles; and
a control engine:
to determine at least one nozzle characteristic for at least one respective nozzle of the plurality of nozzles based at least in part on a temperature change associated with the at least one respective nozzle corresponding to at least one ejection event; and
to control the fluid ejection die to eject drops of fluid for a set of ejection events for a servicing operation;
wherein the at least one ejection event comprises the set of ejection events for the servicing operation, and the temperature change corresponds to the set of ejection events for the servicing operation, and the control engine is to determine the at least one nozzle characteristic for at least one respective nozzle based at least in part on the temperature change corresponding to the set of ejection events for the servicing operation.