Electrophotography – Control of electrophotography process – Of plural processes
Patent
1997-03-12
1999-02-16
Smith, Matthew S.
Electrophotography
Control of electrophotography process
Of plural processes
399 55, 399 72, G03G 1500
Patent
active
058730117
ABSTRACT:
In an electrophotographic image forming apparatus, in order to control image forming conditions, first and second toner images are formed. The first standard toner image has toners of a uniform density, and the second standard toner image has a plurality of dots made of toners with predetermined spaces between them. A light scattered from the first standard toner image and a light normally reflected from the second standard toner image are detected, and image forming conditions are controlled according to the detected lights before an image is formed according to image data. Further, in an image forming apparatus where area gradation is used for forming an image, a plurality of second standard toner images having different area ratios is formed, and gradation can be changed by controlling the image forming conditions according to the lights reflected from the standard toner images.
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Inada Yasuyuki
Takemoto Shinichi
Minolta Co. , Ltd.
Smith Matthew S.
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