US 12,282,278 B2
Image forming apparatus
Akihiko Uchiyama, Shizuoka (JP); and Shuji Saito, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 14, 2023, as Appl. No. 18/134,708.
Claims priority of application No. 2022-069005 (JP), filed on Apr. 19, 2022.
Prior Publication US 2023/0333504 A1, Oct. 19, 2023
Int. Cl. G03G 15/22 (2006.01); G03G 15/00 (2006.01); G03G 21/00 (2006.01)
CPC G03G 15/50 (2013.01) [G03G 21/0005 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an endless image bearing member;
a toner image forming portion configured to form a toner image on the image bearing member;
a light source configured to irradiate a surface of the image bearing member and the toner image formed on the image bearing member with light;
a detecting portion configured to detect reflected light reflected by the image bearing member or the toner image formed on the image bearing member by irradiating the image bearing member or the toner image formed on the image bearing member with light from the light source, the detecting portion including a first light receiving portion configured to receive regular reflection light from the image bearing member or the toner image formed on the image bearing member and a second light receiving portion configured to receive irregular reflection light from the image bearing member or the toner image formed on the image bearing member;
a removing member configured to form a nip in contact with the image bearing member and to remove toner from the image bearing member in the nip; and
a controller configured to control an image forming condition when the toner image is formed on a transfer material, on the basis of a result that the reflected light reflected by the toner supplied to a first region detectable by the detecting portion on the image bearing member is detected,
wherein the controller carries out control so that a first measurement for detecting the reflected light by the detecting portion by irradiating the toner with the light from the light source and a second measurement for detecting the reflected light by the detecting portion by irradiating the surface of the image bearing member with light from the light source are made executable,
wherein in a case that the second measurement is executed, the controller carries out control so that the toner is supplied to the nip in a second region different from the first region,
wherein when the second measurement is started, the controller carries out control so that the toner is supplied to the nip in the second region before a state of the image bearing member is measured, and
wherein the toner supplied to the nip in the second region is supplied to a position detectable by the detecting portion on the image bearing member and includes toner for detecting the irregular reflection light by the second light receiving portion.