ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE, PROCESS CARTRIDGE AND DEVELOPING DEVICE

摘要

PROBLEM TO BE SOLVED: To more accurately detect the residual quantity of toner and to use up the toner completely. SOLUTION: An antenna 9 is provided proximately to a developing roller 3, and electrostatic capacity between both of them is detected and compared with reference electrostatic capacity by a comparator circuit in a device main body. The reference electrostatic capacity is corrected with information stored in a non-volatile storage means 60 provided in a process cartridge 100 as a parameter.