| 摘要 |
Apparatus for controlling the charge level on the photoconductive surface of a reproduction machine to enhance imaging. A corona generator is used to initially charge the photoconductive surface following which the charge is examined and compared with a preselected reference charge. Where an overcharge is found, a lamp, the illumination intensity of which is matched to the degree of overcharge, is actuated to reduce the charge level on the photoconductive surface to substantially the same as the reference charge. The discharge lamp may be combined with the corona generator or be provided separate therefrom. An alternate embodiment has a lamp providing a fixed illumination output is provided with a liquid crystal interposed between the photoconductive surface and the lamp to control the degree of illumination to which the photoconductive surface is subjected.
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