Ink-jet printing apparatus for printing with a plurality kinds o

Details Ink-jet printing apparatus for printing with a plurality kinds o Ink-jet printing apparatus for printing with a plurality kinds o

1996-12-26

2000-06-27

Le, N.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

347 14, 347 15, G01D 1100, B41J 2938, B41J 2205

Patent

active

060798246

ABSTRACT:
In an apparatus for performing printing with a higher density ink and a lower density ink of the same color type, in order to prevent degradation of printing quality due to overlapping printing of the higher and the lower density inks, an input image signal is converted to an output image signal indicative of one of "non-printing" "printing with lower density ink" and "printing with higher density ink" is generated. More specifically, when printing is performed with two kinds of inks, i.e. the higher density ink and the lower density ink with respect to the same color type inks, the input image signal is subject of conversion process into three level data and two out of three levels are taken as printing signals of a head for ejecting the higher and lower density inks.

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