US 12,092,983 B2
Image forming apparatus
Hiroki Hanayama, Kanagawa (JP); and Hiroki Asano, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 3, 2022, as Appl. No. 17/979,819.
Claims priority of application No. 2021-187247 (JP), filed on Nov. 17, 2021; and application No. 2021-187248 (JP), filed on Nov. 17, 2021.
Prior Publication US 2023/0152745 A1, May 18, 2023
Int. Cl. G03G 15/08 (2006.01); G03G 15/00 (2006.01)
CPC G03G 15/80 (2013.01) [G03G 15/0808 (2013.01); G03G 15/0812 (2013.01); G03G 15/5004 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a photosensitive member;
a developing member movable between a contacting position where the developing member contacts the photosensitive member in a contacting state and a separating position where the developing member is separated from the photosensitive member in a separating state, and configured to develop an electrostatic latent image formed on the photosensitive member with toner in the contacting position;
a first contacting member contacting the developing member in a state in which the developing member is positioned in the contacting position and in the separating position;
a first power source including a transformer and configured to generate a first voltage;
a second power source configured to generate a second voltage, from the first voltage, and to apply the second voltage to the developing member;
a third power source configured to generate a third voltage from the second voltage generated by the second power source and to apply the third voltage to the first contacting member; and
a controller configured to, when a potential difference between the second voltage and the third voltage is a first potential difference and a potential difference greater than the first potential difference is a second potential difference, control to form the first potential difference in the separating state and to form the second potential difference in the contacting state,
wherein the controller controls so that an absolute value of the second voltage in the separating state becomes greater than the absolute value of the second voltage in the contacting state.