Image forming apparatus and control method thereof

Details Image forming apparatus and control method thereof Image forming apparatus and control method thereof

2008-02-20

2008-11-25

Chen, Sophia S (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S046000, C399S050000, C399S051000

Reexamination Certificate

active

07457552

ABSTRACT:
Image forming apparatus in which surface electric potentials of a plurality of surface areas are detected by charging a photoconductor with a different applied bias for each predetermined timing and exposing a plurality of surface areas of the photoconductor by scanning the photoconductor with an optical beam, while changing an exposure intensity of the optical beam for each of the surface areas of the photoconductor. Then, the applied bias necessary for obtaining a predetermined electric potential of a dark section and the exposure intensity of the optical beam necessary for obtaining a predetermined electric potential of a bright section are controlled, on the basis of the surface electric potentials that are detected respectively from the different applied biases and the different exposure intensities. Thereby, the adjustment time can be made shorter than the conventional case.

REFERENCES:
patent: 6208820 (2001-03-01), Nami
patent: 6493524 (2001-12-01), Kamiya
patent: 2001/0033754 (2001-10-01), Asai
patent: 2001/0046390 (2001-11-01), Kamiya
patent: 2006/0263108 (2006-11-01), Zona

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