Patent ID: 7918522

Claim:
A printhead system comprising a stationary pagewidth inkjet printhead and a printer controller for supplying dot data to said printhead, said printhead comprising a plurality of first nozzles and a plurality of second nozzles supplied with a same colored ink, said first nozzles and second nozzles being configured in a plurality of sets, wherein each set of nozzles comprises one first nozzle from the plurality of first nozzles and one corresponding second nozzle from the plurality of second nozzles, all nozzles in a set being configurable by said printer controller to print a dot of said ink into a same position on a print medium fed transversely past said printhead, said printer controller being programmed to supply dot data such that said first nozzles and said second nozzles each contribute dots to a line of printing, wherein said printhead comprises a plurality of transversely aligned color channels, each color channel comprising at least one nozzle row extending longitudinally along said printhead, each nozzle in a color channel ejecting the same colored ink, wherein said first nozzles are contained in a first color channel and said second nozzles are contained in a second color channel, wherein said printhead is comprised of a plurality of printhead modules, each printhead module comprising a respective segment of each nozzle row, and said printer controller is further programmed to supply dot data such that each of said printhead modules fires a respective segment within a predetermined segment-time, wherein at least one of said fired segments is contained in a different color channel from at least one other of said fired segments, wherein said segment-time is a predetermined fraction of one line-time, all segments in a nozzle row being fired within one line-time, and wherein said line-time is defined as the time taken for said print medium to advance past said printhead by one line, wherein said printer controller is programmed to supply dot data for firing sequentially a segment from each color channel on the same printhead module, such that all said segments are fired within one line-time.