| 摘要 |
PURPOSE:To obtain a distinct image having stable image quality and having no thinning under every environment by preventing an exposed part from being electrostatically charged again under the environment of high humidity. CONSTITUTION:While impressing voltage between a developing sleeve and a photosensitive drum, the photosensitive drum is electrostatically charged in a state where conductive magnetic toner is brought into contact with the photosensitive drum, and simultaneously exposure is performed by an exposing device and then, development is performed in an electrophotographic device. The electrophotographic device is provided with a humidity sensor 29, and a control circuit part 27 drives a motor 28 for changing a light irradiation position based on a detection signal from the sensor 29 so as to switch an exposing position for the surface of the photosensitive drum 1 to a 2nd exposing position being the rear position of toner reservoir under the environment of high humidity and to a 1st exposing position being the front position of the toner reservoir under standard environment. |
