Method and apparatus for controlling a charge voltage of an OPC

Details Method and apparatus for controlling a charge voltage of an OPC Method and apparatus for controlling a charge voltage of an OPC

1997-03-17

1998-09-22

Royer, William J.

Electrophotography

Control of electrophotography process

Control of charging

361221, 361225, 399176, G03G 1502

Patent

active

058129057

ABSTRACT:
A method and apparatus for controlling a charge voltage of an organic photoconductive (OPC) drum in an electrophotographic image forming device, which are to improve the quality of the image by charging the OPC drum surface uniformly independent of voltage deviation between the OPC drum and the charging roller, the ambient temperature and humidity of the image forming device. This apparatus is comprised of a detector for measuring a ground current flowing through a ground of the OPC drum, a comparator for comparing the measured ground current and preset voltage-related information, and a controller for deriving an optimum voltage for charging the OPC drum based on the resultant of comparison.

REFERENCES:
patent: 5159388 (1992-10-01), Yoshiyama et al.
patent: 5420671 (1995-05-01), Kisu et al.
patent: 5457522 (1995-10-01), Haneda et al.

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