Patent ID: 8123319

Claim:
A fluid ejection system comprising: a fluid reservoir; a support to move a media in a first direction; a first plurality of independently controllable fluid ejector units comprising a first plurality of nozzles and a first plurality of actuators, the first plurality of independently controllable fluid ejector units coupled to draw a liquid from the fluid reservoir; a second plurality of independently controllable fluid ejector units comprising a second plurality of nozzles and a second plurality of actuators, the second plurality of independently controllable fluid ejector units coupled to draw a same liquid from the fluid reservoir; a controller electronically coupled to the first plurality of actuators and the second plurality of actuators and configured to cause the first plurality of nozzles and the second plurality of nozzles to eject droplets of the liquid while the media is moving to form a line of pixels on the media in a single pass, pixels in the line of pixels uniformly spaced at a pixel pitch p; wherein the first plurality of nozzles and the second plurality of nozzles are arranged in a plurality of nozzle pairs, each nozzle pair of the plurality of nozzle pairs including a first nozzle from the first plurality of nozzles and an associated second nozzle from the second plurality of nozzles, the first nozzle and associated second nozzle of each nozzle pair spaced apart in a second direction perpendicular to the first direction by greater than zero and less than the pixel pitch p and spaced apart in the first direction, and wherein the controller is configured such that the first nozzle and the second nozzle of each nozzle pair deposit droplets at the same pixel in the line of pixels.