METHOD FOR READING SURFACE ELECTRIC POTENTIAL OF PHOTORECEPTOR AND DEVICE FOR EVALUATING CHARACTERISTICS OF PHOTORECEPTOR

摘要

PROBLEM TO BE SOLVED: To provide a method for automatically reading surface electric potential of a photoreceptor without being affected by uncertainty of periodicity of an electric potential signal, various signal levels, or noise superimposed on the signal, when automatically reading the measured electric potential signal.;SOLUTION: In the method for measuring the surface electric potential of a photoreceptor from the surface electric potential signal stored in a signal processor, at least a charging device, an exposure device, a surface electric potential measuring probe, and a static eliminator are closely arranged around a rotatable photoreceptor drum, and the signal processor for A/D converting and storing the electric potential signal detected by the surface electric potential measuring probe is provided. As an improved method for generating a binarized signal from the surface electric potential signal stored in the signal processor and reading the surface electric potential of a prescribed position from the original surface electric potential based on the generated binarized signal, algorithm for automating the determination of a threshold for generating the binarized signal is adopted so that the reading of the surface electric potential is further automated.;COPYRIGHT: (C)2007,JPO&INPIT