Compensation for device aging

Print quality is maintained by determining print conditions based on varying threshold values over the printhead lifetime before the print run. In particular, print conditions are determined through periodic quality adjustment cycles based on detected long-term and short-term temporal drift of print...

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Bibliographische Detailangaben
Hauptverfasser:	BECERRA JUAN J, WATROBSKI THOMAS E
Format:	Patent
Sprache:	eng
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PICTORIAL COMMUNICATION, e.g. TELEVISION PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	Print quality is maintained by determining print conditions based on varying threshold values over the printhead lifetime before the print run. In particular, print conditions are determined through periodic quality adjustment cycles based on detected long-term and short-term temporal drift of print thresholds. A detector is provided to detect the presence or absence of ink being ejected from an inkjet printer. A sequence of eject and detect cycles over varying control conditions is performed to determine the minimum condition required to eject ink from the printer.