Print mode and system to alleviate wait-banding

Details Print mode and system to alleviate wait-banding Print mode and system to alleviate wait-banding

1995-03-03

1997-07-01

Bost, Dwayne

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347 41, G06K 1500

Patent

active

056446837

ABSTRACT:
An improved print mode and system for alleviating wait-banding is disclosed. When printing multiple passes over the same swath, such as when printing secondary colors in a color image, a hue shift can occur if the time between when the two passes are deposited are laid down is not regulated. This is true because the secondary color that results depends on how dry the ink from the first pass is when the second pass is deposited. These variations in color result in undesirable horizontal bands, a problem referred to as "wait-banding." Typical ink-jet printers compose in page sectors, but print in scans or passes. The time that it takes to compose the page sectors varies from sector to sector. These variations can cause differences in the time intervals between when overlapping passes will be printed, thus resulting in wait-banding. The disclosed method creates a running average for the passes based on past experience with when passes were made. This running average is used to space out the passes within a page sector so that the passes are more uniformly distributed in time, thus alleviating wait-banding.

REFERENCES:
patent: 4855752 (1989-08-01), Bergstedt
patent: 5043748 (1991-08-01), Katayama et al.
patent: 5198833 (1993-03-01), Kubota
patent: 5216754 (1993-06-01), Sathi et al.
patent: 5359355 (1994-10-01), Nagoshi et al.
patent: 5477246 (1995-12-01), Hirabayashi et al.
patent: 5489926 (1996-02-01), Arbeiter

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