Title:
IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2022069076
Kind Code:
A
Abstract:
To accurately obtain a surface potential of an image carrier without using an expensive sensor such as a surface potential sensor.SOLUTION: An image forming apparatus 1 comprises: a developing device 64 that develops an electrostatic latent image formed on a photoreceptor drum 65 to form a toner image; an electrifying device 63 that electrifies the photoreceptor drum 65; a developing power supply 648 that applies a predetermined developing bias voltage to the developing device 64; a calculation unit 647 that calculates a surface potential of the photoreceptor drum 65 based on a developing current flowing in the developing device 64; and a control unit 10 that, based on the surface potential and the rotation speed t of the photoreceptor drum 65, determines the state of the photoreceptor drum 65 or the electrifying device 63. The calculation unit 647 calculates the surface potential according to the plurality of rotation speeds t. The control unit 10 takes the correspondence relationship between the surface potential and the rotation speed t as a linear function, and based on the inclination of the linear function, determines if the photoreceptor drum 65 is in an abnormal state or if the electrifying device 63 is in an abnormal state.SELECTED DRAWING: Figure 2
Inventors:
TANAKA KAZUNORI
YAMAGISHI YOSHIHIRO
SHIMIZU TAMOTSU
YAMAGISHI YOSHIHIRO
SHIMIZU TAMOTSU
Application Number:
JP2020178041A
Publication Date:
May 11, 2022
Filing Date:
October 23, 2020
Export Citation:
Assignee:
KYOCERA DOCUMENT SOLUTIONS INC
International Classes:
G03G21/00; G03G15/00
Attorney, Agent or Firm:
Hiroyuki Maei
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