Error reduction by print masks

Details Error reduction by print masks Error reduction by print masks

2007-08-28

2007-08-28

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S013000, C358S001900

Reexamination Certificate

active

11067653

ABSTRACT:
In a method of printing a plurality of pages during a print job, a page-wide-array printing device having redundant dot-forming elements is used. Print masks distribute dot-forming-element activity between the redundant dot-forming elements in a manner taking into account known malfunctions of dot-forming elements to hide such malfunctions, or reduce a visible effect of such malfunctions in the pages printed. The method includes generating a plurality of print masks which are different, as they distribute the dot-forming-element activity in different ways, but are equivalent, since they are based on the same knowledge of dot-forming-element malfunctions; dividing the print job into page-sets of at least one page; and printing the different page-sets of the print job using different equivalent print masks, thereby distributing the dot-forming-element activity in different ways from page-set to page-set.

REFERENCES:
patent: 6938970 (2005-09-01), Van den Bergen
patent: 6942308 (2005-09-01), Molinet et al.
patent: 2004/0032455 (2004-02-01), Silverbrook

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