Electrostatic charge differential amplification (CDA) in imaging process

作者： John W. May , Yee S. Ng

DOI:

关键词: Process (computing) 、 Charge (physics) 、 Maximum density 、 Electric charge 、 Electrode 、 Molecular physics 、 Electrical engineering 、 Range (particle radiation) 、 Surface layer 、 Differential amplification 、 Materials science

摘要: A method for amplifying an electrostatic, charge-differential pattern is disclosed. The comprises (a) imagewise forming a first toner deposit by developing electrostatic having charge differential per unit area whose maximum value no greater than preselected level, (b) in image-amplification element comprising charge-holding surface layer overlying field-supporting electrode, current-carrying path between the and (c) under conditions which nontoned regions are not photoexcited, overall charging with sufficient to form enhanced second step (a), (d) into deposit. By this process, high-maximum-density, continuous-tone images can be produced wherein density of such obtained amplification initial differentials is, example, 30 nanocoulombs/cm 2 or lower. In addition, low contrast, i.e., over wide exposure range.