Electrophotographing apparatus

Abstract

An electrophotographing apparatus includes a photosensor for sensing or detecting a reflectance of an original, and an output voltage of the photosensor is sent to a microcomputer. In response to the output voltage of the photosensor, the microcomputer controls a bias voltage which is applied to an electric conductive substrate of a photoreceptor from a bias voltage source. The bias voltage is adjusted such that a change of an exposed voltage according to the reflectance of the original can be canceled, and resultingly, the exposed voltage is kept constant. On the other hand, a developer is connected to the ground, and therefore, a voltage difference between the exposed voltage and a developing voltage becomes constant.

Dependencies are inferred from the claim text.