Inking for color-inkjet printers, using non-integral drop averag

Details Inking for color-inkjet printers, using non-integral drop averag Inking for color-inkjet printers, using non-integral drop averag

1993-04-30

1996-01-16

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 43, 358298, 358518, B41J 2205

Patent

active

054851807

ABSTRACT:
At least one certain primary or secondary color is established that receives special treatment for at least one printing medium. Such treatment may include (1) using more than two drops of primaries per pixel for binary printing of a particular secondary; or (2) binary-printing the chromatic primary or secondary--but not other hues--after rendition, by use of a "superpixel"; or (3) application of, in effect, a nonintegral number, greater than one, of ink drops per pixel; or (4) combinations of these treatments. As an example of the first of these treatments--using inks optimized for plain paper at one drop of ink for primaries and two (one of each of two primaries) for secondaries--red is printed on transparency film as one drop of yellow ink and two of magenta in each pixel. As to the second treatment, the superpixel is preferably a group of pixels (e.g., a two-by-two array) including the target pixel, in which group each pixel is inked and at least one pixel receives at least two drops of ink.

REFERENCES:
patent: 4528576 (1985-07-01), Koumura et al.
patent: 4672432 (1987-06-01), Sakurada et al.
patent: 4943813 (1990-07-01), Palmer et al.
patent: 4963882 (1990-10-01), Hickman
patent: 4967203 (1990-10-01), Doan et al.
patent: 5012257 (1991-04-01), Lowe et al.

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