| 摘要 |
An electrostatic copying apparatus comprising a photosensitive layer prepared from a photoconductive material, corona discharge unit which generates a corona discharge to form an electrified corona discharge region on the photosensitive layer, light-emitting unit which is disposed adjacent to the corona discharge unit and emits light beams over the electrified corona discharge region of the photosensitive layer, thereby producing a conductive light-irradiated region on the photosensitive layer, and adjustment device for controlling the dimensions of the light-irradiated region to control the overlapping portions of the light-irradiated region and corona discharge region, thereby selectively defining the substantially electrified portion of the corona discharge region.
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