Ink jet printing method and ink jet printing apparatus

Details Ink jet printing method and ink jet printing apparatus Ink jet printing method and ink jet printing apparatus

2007-11-06

2007-11-06

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S015000, C347S029000

Reexamination Certificate

active

11150125

ABSTRACT:
The image quality deterioration due to the collection of dots of low-lightness by the preliminary ejection is prevented, in the case of performing the ink ejection for preliminary ejection during the printing onto printing paper. More specifically, the preliminary ejection pattern is set as a pattern in which the distance between a cyan dot of relatively low-lightness and a magenta dot is longer than a distance between a yellow dot of relatively high-lightness and a cyan dot nearest the yellow dot among low-lightness colors. Closely forming dots of low-lightness that would be perceived as a group of collected dots can be prevented, thereby performing printing that will not deteriorate the printing quality due to the paper preliminary ejection.

REFERENCES:
patent: 6984009 (2006-01-01), Nakagawa et al.
patent: 7014292 (2006-03-01), Yazawa et al.
patent: 7029092 (2006-04-01), Edamura et al.
patent: 55-139269 (1980-10-01), None

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