公开(公告)号：EP2073983A1

公开(公告)日：2009-07-01

申请号：EP06790345.0

申请日：2006-10-09

申请人： Silverbrook Research Pty. Ltd ,  Sheahan, John, Robert ,  Pulver, Mark, Jackson ,  Morahan, Brian, Christopher ,  Moini, Alireza ,  Gillespie, Timothy, Peter ,  Webb, Michael, John ,  Gannon, Marcelle, Louisa ,  Brown, Brian, Robert ,  Plunkett, Richard Thomas ,  North, Angus, John ,  Silverbrook, Kia

发明人： SHEAHAN, John, Robert ,  PULVER, Mark, Jackson ,  MORAHAN, Brian, Christopher ,  MOINI, Alireza ,  GILLESPIE, Timothy, Peter ,  WEBB, Michael, John ,  GANNON, Marcelle, Louisa ,  BROWN, Brian, Robert ,  PLUNKETT, Richard, Thomas ,  NORTH, Angus, John ,  SILVERBROOK, Kia

IPC分类号： B41J2/32

CPC分类号： B41J2/155 ,  B41J2/0454 ,  B41J2/04541 ,  B41J2/04565 ,  B41J2/04596 ,  B41J2/2142 ,  B41J2/2146 ,  B41J2/35 ,  B41J2/3553 ,  B41J2/365

摘要： A printhead IC comprising:an array of nozzles;an ejection actuator corresponding to each of the nozzles respectively, the ejection actuator having a resistive heater that is activated when the actuator ejects ink through the corresponding nozzle;drive circuitry for receiving print data and activating the actuators with drive signals in accordance with the print data; and,open actuator test circuitry for selectively disabling the actuators when they receive a drive signal while comparing the resistance of the resistive heater to a predetermined threshold to assess whether the actuator is defective.