Multi-drop ink-jet recording method with compensation for image

Details Multi-drop ink-jet recording method with compensation for image Multi-drop ink-jet recording method with compensation for image

1992-06-03

1995-01-24

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 201

Patent

active

053845870

ABSTRACT:
After an ink-jet recording head with a plurality of discharging portions arranged is main-scanned in a direction perpendicular to the direction of the discharging portion arrangement to record a first image area, sub-scanning of the head is performed. Before the head is main-scanned to record a second image area, the sub-scanning is performed so that a few discharging portions on an upper edge portion of the head in second main-scanning overlap part of the first image area. Ink droplets land on pixels in the overlapping portion twice for each main-scanning, and image density of the pixels in the overlapping portion is controlled by the sum number of the landing ink droplets. This enables image density unevenness of image density, example, a "black stripe (banding)" or a "white stripe (banding)" in a boundary of an image area being recorded in each main-scanning, to be markedly reduced.

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