Apparatus for controlling an output of chargers for use in image

Details Apparatus for controlling an output of chargers for use in image Apparatus for controlling an output of chargers for use in image

1990-01-17

1992-11-03

Stephan, Steven L.

Electricity: electrical systems and devices

Electric charging of objects or materials

355208, 355216, 355219, G03G 1500

Patent

active

051610841

ABSTRACT:
A charger for initial charging is built on the surface of a photosensitive drum. A discharge lamp removes the charge from the photosensitive drum. A current detection unit detects the current flowing from the photosensitive drum upon the removal of the charge from the surface of the photosensitive drum by the discharge lamp. A control unit compares a current which is detected by a current detection unit with a reference value which is initially stored in a memory and generates a digital value corresponding to a difference error between them. An A/D converter converts the digital value which is generated from the control unit into an analog current for supply to the first-mentioned charge. The aforementioned process is repeated by an instruction of the control unit until the difference value between the current detected by the current detection unit and the reference value comes within an allowable range.

REFERENCES:
patent: 3887845 (1975-06-01), Michatels
patent: 4133610 (1979-01-01), Bernardelli et al.
patent: 4341457 (1982-07-01), Nakahata et al.
patent: 4411514 (1983-10-01), Komori et al.
patent: 4563081 (1986-01-01), Sato
patent: 4564287 (1986-01-01), Suzuki et al.
patent: 4607937 (1986-08-01), Minami
patent: 4672505 (1987-06-01), Tsuchiya et al.
patent: 4814823 (1989-03-01), Abuyama et al.
patent: 4994855 (1991-02-01), Ohashi et al.

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