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COMPENSATION OF SUBUNIT PRINT DENSITY VARIATION IN A FULL WIDTH THERMAL INK JET PRINTBAR

IP.com Disclosure Number: IPCOM000027125D
Original Publication Date: 1995-Jun-30
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal

Abstract

The present proposal addresses a method for enhancing the print quality of a thermal ink jet printbar. A means is provided for varying the print density of each die subunit. Often there is a significant print density variation among dies from the same wafer pair. The variation is controlled by power compensation to each printbar die in accordance with an average wafer drop size. Dies yielding light print density receive extra power so as to increase the average drop size. By individually tailoring power to each die, a uniform print density exists across the printbar.