Verfahren und Einrichtung zur Verbesserung der Bildqualität in einem Druckgerät

摘要

An Inkjet printing device (20) for printing plots comprises a printhead, which has a plurality of nozzles (310) each nozzle having at least a working status and a failing status, a servicing unit capable of applying recovery functions to said plurality of nozzles, detection means for checking if a nozzle is in a working status or in a failing status, memory means and a plurality of functions executable by said device to improve image quality. Said memory means, responsive to said detection means, contains data on how the status of a nozzle is varying over time. Said device further comprises means to select and execute at least one of said plurality of functions, responsive to the data stored in said memory means. A method of improving image quality on plots produced by said device said method comprising the steps of: checking the status of one or more nozzles; storing in a memory support the status of a checked nozzle as dedected during said checking step; and based on a plurality of said statuses stored over time in said memory support, performing an appropriate function from said variety for improving the image quality.