Patent ID: 7018007

Claim:
A computer-based method to control a plurality of nozzles of a print head to more uniformly print a plurality of lines of an OLED display, comprising: grouping said plurality of nozzles to form a plurality of effective groups of nozzles; printing a subset of said plurality of lines using a first one of said plurality of effective groups of nozzles; and reprinting said subset of said plurality of lines using a second one of said plurality of effective groups of nozzles, wherein nozzles of said first one of said plurality of effective groups of nozzles are different than nozzles of said second one of said plurality of effective groups of nozzles, wherein printing occurs by depositing an organic electroluminescent material or an organic conductive material, wherein none of the nozzles in one of said plurality of effective groups of nozzles are in another one of said plurality of effective groups of nozzles, and further comprising: determining whether some of said plurality of nozzles should be deactivated; and deactivating said some of said plurality of nozzles that should be deactivated wherein a number of said plurality of nozzles to deactivate during a first swath is: EffectiveNozzles*(AverageAmount−1), where EffectiveNozzles is a number of nozzles in a particular one of said plurality of effective groups of nozzles, and AverageAmount is a number of different nozzles that print into a particular one of said plurality of lines.