Electrophotographic system

Claim 1

An electrophotographic apparatus comprising: a photoconductive layer of a predetermined conductivity type having a pair of first and second main surfaces opposite to each other and including majority carriers having a predetermined polarity for receiving an imaging light to be recorded to generate hole-electron pairs in that portion of said layer adjacent to said second main surface, a transparent electrode layer disposed on the side of the second main surface of the photoconductive layer, a dielectric recording medium disposed in spaced opposed relationship with the first main surface of the photoconductive layer with a gap therebetween, a source of DC recording voltage coupled across said transparent electrode layer and said dielectric recording medium for applying a DC recording voltage with a polarity making said transparent electrode layer identical in polarity to the majority carriers present in said photoconductive layer, said DC recording voltage being for transferring those carriers of said hole-electron pairs identical in polarity to said majority carriers present in said photoconductive layer to said first main surface of said photoconductive layer thereby to form an electrostatic latent image corresponding to said imaging light on said first main surface of said photoconductive layer and also to transfer said electrostatic latent image to said dielectric recording medium, and a carrier transparent blocking layer sandwiched between said second main surface of said photoconductive layer and said transparent electrode layer, said carrier blocking layer being for permitting said imaging light to pass to the second main surface of the photoconductive layer and also to prevent those carriers identical in polarity to said majority carriers present in said photoconductive layer from being injected into said photoconductive layer from said transparent electrode layer.