Image forming apparatus equipped with image quality and adjustin

Details Image forming apparatus equipped with image quality and adjustin Image forming apparatus equipped with image quality and adjustin

1996-01-17

1997-11-18

Lee, S.

Electrophotography

Control of electrophotography process

Control of exposure

G03G 15043

Patent

active

056897626

ABSTRACT:
A reflected-light amount detecting process is performed for white-standard and halftone-standard originals, respectively. Based on the analysis of resulting images, correct exposure voltages Vcl(WH) and Vcl(HT) are determined. When the thus determined voltage is applied to a copy lamp to turn it on, an AE sensor, receiving the light reflected from a corresponding original of the white-standard and halftone-standard originals, and outputs a corresponding output current Vae(WH) or Vae(HT). These output currents detected are used in combination with the correct exposure voltages Vcl(WH) and Vcl(HT), to calculate control constants for determining a control characteristic.

REFERENCES:
patent: 4965634 (1990-10-01), Bando
patent: 4982232 (1991-01-01), Naito

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