Patent ID: 7901023

Claim:
An inkjet printhead comprising: an array of ink ejection nozzles; a plurality of actuators, each actuator being associated with a respective one of the nozzles for ejection of ink from said nozzle; and drive circuitry for receiving print data from a printhead controller and distributing fire signals to the actuators; wherein the drive circuitry is configured to fire the actuators such that a first firing sequence for a first line of print is different to a second firing sequence for a subsequent second line of print, and wherein the drive circuitry has nozzle enable latches for each of the actuators respectively, each nozzle enable latch holding a fire signal for the nozzles selected to fire in the next line of print, and shift registers for loading the fire signals to the latches in accordance with the print data received from the printhead controller, the shift registers being configured to load the latches of the selected nozzles for one line of print while the nozzles selected for the previous line of print are firing.