05485180 is referenced by 9 patents and cites 7 patents.

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.

Title
Inking for color-inkjet printers, using non-integral drop averages, media varying inking, or more than two drops per pixel
Application Number
926264
Publication Number
5485180
Application Date
April 30, 1993
Publication Date
January 16, 1996
Inventor
William J Allen
Portland
OR, US
Lance Cleveland
San Diego
CA, US
Mark S Hickman
Vancouver
WA, US
Corrina A E Hall
Escondido
CA, US
Keshava A Prasad
San Marcos
CA, US
Catherine B Hunt
San Diego
CA, US
Ronald A Askeland
San Diego
CA, US
Assignee
Hewlett Packard Company
CA, US
IPC
B41J 2/205
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