Importance

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Abstract

Improved color ink-jet printing is accomplished by an ink-jet nozzle array configuration (32, 110) which has an odd number of nozzles (34) that are uniformly spaced apart by two line widths (2 V) such that naturally interlaced printing is accomplished when a print head (54) employing the nozzle array configuration is moved in uniformly stepped intervals. A color ink-jet print head employing the array configuration further employs multiple horizontally spaced apart instances (30) of the array in which each array ejects a particular color of ink, and the nozzles of each array are aligned in the direction of scanning to eject ink toward a common band of lines. One printing method includes, following standard mode printing, moving the print medium one line width, disabling a first section of the nozzles, enabling a second section of the nozzles, shifting print data from the first section to the second section and printing closer to an edge of the print medium during a substantially last scan than would be possible without the disabling and shifting. Another printing method includes printing during four scans on even and odd numbered line sets in even and odd numbered pixel columns.

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First Claim