Image forming apparatus capable of controlling amount of light o

Details Image forming apparatus capable of controlling amount of light o Image forming apparatus capable of controlling amount of light o

1995-11-14

1997-05-27

Pendegrass, Joan H.

Electrophotography

Control of electrophotography process

Control of exposure

G03G 1504

Patent

active

056341733

ABSTRACT:
In an adjustment mode, a black reference member is positioned opposite to a photosensor. Light reception data output from an A/D converter at this time is stored in a memory. In an image formation mode, based on a value obtained by subtracting output data stored in the memory from output data of the A/D converter in a state where the photosensor is opposite to an original, a copy lamp is driven. As a result, an image mode can be controlled based on an accurate detection result of an image density.

REFERENCES:
patent: Re32330 (1987-01-01), Miyakawa et al.
patent: 4124294 (1978-11-01), Nakamura
patent: 4831418 (1989-05-01), Ito et al.
patent: 4990957 (1991-02-01), Nakanishi et al.
patent: 5336976 (1994-08-01), Webb et al.

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