Fluid ejection assembly with circulation pump
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlexander Govyadinov, Jason Oak
Life of this patent
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Abstract
A fluid ejection assembly includes a fluid slot, a recirculation channel, and a drop ejection element within the recirculation channel. A pump element is configured to pump fluid to and from the fluid slot through the recirculation channel. A first addressable drive circuit associated with the drop ejection element and a second addressable drive circuit associated with the pump element are capable of driving the drop ejection element and the pump element simultaneously.
Claims13
A fluid ejection assembly comprising:
- a fluid slot;
- a recirculation channel;
- a drop ejection element within the recirculation channel;
- a pump element to pump fluid to and from the fluid slot through the recirculation channel;
- and
- a first addressable drive circuit associated with the drop ejection element and a second addressable drive circuit associated with the pump element, the drive circuits capable of driving the drop ejection element and the pump element simultaneously and configured to receive signals from a controller to activate the drop ejection element and pump element within a programmed time interval of one another.
A method of operating a fluid ejection assembly, comprising:
- within a fluid recirculation channel of a fluid ejection assembly:
- activating a drop ejection element to eject a fluid drop from a drop generator;
- and,
- increasing ejection energy to the fluid drop by activating a pump element first, and activating the drop ejection element within a programmable time interval of activating the pump element.
A fluid ejection device, comprising:
- a fluid ejection assembly having a drop ejection element and a pump element within a recirculation channel;
- an electronic controller;
- and
- a drop energy boost module executable on the electronic controller to activate the drop ejection element within a time interval of activating the pump element.
Dependencies are inferred from the claim text.