Printhead ic with sub ejection control
AssigneeSilverbrook Research Pty Ltd
InventorsJohn Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Abstract
A printhead IC is provided having an array of ejection nozzles, sensing circuitry for sensing a temperature of the nozzle array which is de-activatable after a period of use, and drive circuitry for receiving print data and providing drive pulses to the nozzles to cause ejection in accordance with the print data. The drive circuitry is configured to set the duration of the drive pulses to a sub-ejection value for any nozzle which is not to eject in accordance with the print data.
Claims6
A printhead IC comprising:
- an array of ejection nozzles;
- sensing circuitry for sensing a temperature of the nozzle array, the sensing circuitry being de-activatable after a period of use;
- and
- drive circuitry for receiving print data and providing drive pulses to the nozzles to cause ejection in accordance with the print data, the drive circuitry being configured to set the duration of the drive pulses to a sub-ejection value for any nozzle which is not to eject in accordance with the print data.
Dependencies are inferred from the claim text.