ELECTRIFIED BODY LIFE DETECTING DEVICE, PROCESS UNIT WITH IT, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To accurately detect the life of an electrified body with a contact electrifying member applied with a superimposing voltage containing an AC bias component. SOLUTION: The time when a superimposing voltage containing an AC bias component is applied to an electrifying roller 2 is integrated. Only the time when the damage of a photoreceptor 1 occurs most remarkably is integrated, and this integrated value and the life information set in advance are compared by a comparison section 25. The deterioration degree of the photoreceptor 1 can be detected based on the compared result, and the life of the photoreceptor 1 can be accurately grasped.