Charging device

Details Charging device Charging device

1999-01-28

2000-03-21

Lee, Susan S.Y.

Electrophotography

Control of electrophotography process

Control of charging

G03G 1502

Patent

active

06041197&

ABSTRACT:
The present invention provides a contact type charging device for applying a lower frequency AC voltage in combination with a DC voltage to an electric charger so as to suppress generation of noise in the electric charger as well as eliminate a Moire image in a half tone image when the DC voltage is overlapped with the lower frequency AC voltage, thus enabling to improve a charge uniformity. The charging device includes: an electric charger 1 that is in contact with an electrostatic latent image carrier 100 and applies a predetermined voltage to the electrostatic latent image carrier 100 for charging it; and a power source consisting of a DC power source 13 and an AC power source 15 for applying to the electric charger 1 a DC voltage in combination with an AC voltage. The AC power source 15 has a frequency of a predetermined value corresponding to a latent image to be formed on the electrostatic latent image carrier 100.

REFERENCES:
patent: 5479244 (1995-12-01), Kashihara et al.

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