PURPOSE: To perform picture quality switching with improved operativity and reproductibility by providing a means which switches the electrostatic charging potential and exposure amount of a phtosensitive body in plural stages.
CONSTITUTION: The output voltage of a high voltage power source 8 connected to an electrostatic charge corotron 7 is switched with the switch 9 of a panel to vary the charge potential of the photosensitive body 1, and the voltage of the power source 11 of an exposure lamp 10 is switched associatively with said switching to make an automatic adjustment. The density of an image is switched with ten gradations and a developing device which varies gamma is used to vary the image quality easily according to the difference of originals or by preference. Therefore, a proper image is obtained easily by varying the charge potential and exposure amount of the photosensitive body 1.
HAYASHI MIKI
SHIBATA TAKENORI
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