Electrophotography – Control of electrophotography process – Control of developing
Patent
1995-04-25
1997-10-14
Ramirez, Nestor R.
Electrophotography
Control of electrophotography process
Control of developing
399 60, 399 74, G03G 2100
Patent
active
056781326
ABSTRACT:
An image forming apparatus forms a patch image on a recording medium, irradiates the patch image formed on the recording medium with light, and detects a quantity of light reflected by the patch image and outputs a first detection signal. The apparatus detects a quantity of light emitted by a light emission source and outputs a second detection signal, and amplifies the first detection signal in accordance with a first amplification gain and outputs a first amplified signal. The apparatus amplifies the second detection signal in accordance with a second amplification gain and outputs a second amplified signal, and controls image forming conditions based on the first amplified signal or the second amplified signal. An adjustment mode is executed prior to controlling the image forming conditions, and the first amplification gain is controlled when the patch image is formed with black toner, and the second amplification gain is controlled when the patch image is formed with color toner.
REFERENCES:
patent: 5140349 (1992-08-01), Abe et al.
patent: 5146273 (1992-09-01), Yamada
patent: 5166730 (1992-11-01), Urabe
patent: 5497221 (1996-03-01), Takemoto
patent: 5568234 (1996-10-01), Shiba
Mano Hiroshi
Shiba Hiroshi
Ueno Fumihiro
Canon Kabushiki Kaisha
Ramirez Nestor R.
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