Printer, dither matrix generation method, and recording medium

Details Printer, dither matrix generation method, and recording medium Printer, dither matrix generation method, and recording medium

2007-01-22

2008-05-13

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C358S001900, C358S003130

Reexamination Certificate

active

07370929

ABSTRACT:
A printer has a head where outlets are arranged in a width direction perpendicular to a predetermined scan direction, and a printing paper moves under the head in the scan direction. In a basic dither matrix which is an array where element values are arranged in a column direction corresponding to the scan direction and a row direction corresponding to the width direction and positions in the row direction are associated with the outlets in the head, respectively, the element values are modified on the basis of variation in print densities with respect to the width direction caused by ejection from the outlets. In the printer, printing is performed with the modified dither matrix, it is therefore possible to print an image at high speed and easily, where unevenness caused by variation in ejection amounts of droplets from the outlets or the like is suppressed.

REFERENCES:
patent: 7187387 (2007-03-01), Deishi
patent: 7201462 (2007-04-01), Shibata et al.
patent: 3179183 (2001-06-01), None
patent: 2004-106248 (2004-04-01), None

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