US Patent 7611215 Inkjet printer system having equalised control of multi-length printhead ICS

An inkjet printer system is provided having an pagewidth printhead and controller, The printhead has at least two integrated circuits of different lengths arranged across the pagewidth to define the pagewidth printhead having at least one row of inkjet nozzles for printing one ink color formed by adjacent inkjet nozzle rows of the adjacent integrated circuits. The controller is configured to transfer print data to each of the integrated circuits of the printhead at a rate proportional to their relative lengths so that the print data is transferred to each of the integrated circuits in equal time.