Image correction method and image forming apparatus

Details Image correction method and image forming apparatus Image correction method and image forming apparatus

2007-07-31

2007-07-31

Chen, Sophia S. (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C358S406000, C399S046000, C399S072000

Reexamination Certificate

active

11084493

ABSTRACT:
One embodiment of an image correction method is an image correction method for correcting image forming condition(s). The image correction method includes forming, on photoreceptor(s), correction test pattern(s) having continuously varying toner gradation; wherein a single correction test pattern in which density is varied in sequence from high to low in paper transport direction(s) is formed as a result of controlling exposing unit laser power(s) while photoreceptor charging potential(s) is/are held constant, or while develop bias(es) is/are held constant, or while photoreceptor charging potential(s) is/are held constant and develop bias(es) is/are held constant. In such case, total length(s) in paper transport direction(s) of such correction test pattern(s) is/are less than or equal to circumference(s) of photoreceptor(s).

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