公开(公告)号：WO2019117846A1

公开(公告)日：2019-06-20

申请号：PCT/US2017/065519

申请日：2017-12-11

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： ANDERSON, Daryl E. ,  MARTIN, Eric ,  GARDNER, James Michael ,  MORRIS, Jordan

IPC: B41J2/165 ,  B41J2/175 ,  B41J29/393

Abstract: A fluid ejection system may include a fluidic die comprising at least one fluid ejection device, at least one electrical impedance sensor to detect at least one impedance value during a plurality of stages of existence of a drive bubble in at least one firing chamber associated with the at least one fluid ejection device, and a service station wherein, based on the impedance values detected, the printing system services the at least one fluid actuator.