Image forming apparatus for stabilizing the density of dot image

Details Image forming apparatus for stabilizing the density of dot image Image forming apparatus for stabilizing the density of dot image

1998-06-15

1999-07-06

Royer, William

Electrophotography

Control of electrophotography process

Control of developing

399 55, 399 56, G03G 1508

Patent

active

059207477

ABSTRACT:
In an electrophotographic image forming apparatus, the density of a dot image is stabilized by detecting the toner density of a first standard toner image having toners of a uniform density formed on a photoconductor, adjusting the development bias voltage applied to a development device according to the detected toner density. The adjusted development bias voltage is used to form on the photoconductor a second standard toner image having toners of dots with predetermined spaces there between. Then, an area ratio of dot area to unit area of the second standard toner image is detected and is used to control the image forming conditions of the image forming apparatus to stabilize the density of a dot image.

REFERENCES:
patent: 4505572 (1985-03-01), Ashida et al.
patent: 4796065 (1989-01-01), Kanbayashi
patent: 5107302 (1992-04-01), Bisaiji
patent: 5124750 (1992-06-01), Naito
patent: 5315352 (1994-05-01), Nakane et al.

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