Electrophotography – Control of electrophotography process – Control of exposure
Patent
1998-09-22
2000-05-09
Braun, Fred L.
Electrophotography
Control of electrophotography process
Control of exposure
399 55, G03G 1502
Patent
active
060615346
ABSTRACT:
In a two-color image forming apparatus, correction exposure of creating an area having a potential between an image area potential and a white area potential is made for a decided white area on the periphery of the image area. A potential difference between the image area and white area is reduced to attenuate an edge effect, thereby preventing the fringe development. This is accomplished by varying the light amount for the white areas of the intermediate potential areas as a function of the following: surface potentials measured, change in the developing bias voltage and rotating speed of a developing roll, adjustment of the amount of toners by a toner sensor, changing the resistance of a developer, and/or development of raster image processing.
REFERENCES:
patent: 4078929 (1978-03-01), Gundlach
patent: 5751437 (1998-05-01), Parker et al.
patent: 5835819 (1998-11-01), Yamamoto
patent: 5884119 (1999-03-01), Maruo et al.
Akatsu Shinichi
Mitsuya Teruaki
Okada Hisao
Braun Fred L.
Hitachi Koki Co,. Ltd.
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