US 11,841,660 B2
Image forming apparatus
Sumito Tanaka, Tokyo (JP); Sho Ikemoto, Kanagawa (JP); Tatsuomi Murayama, Chiba (JP); Yuko Kiyota, Ibaraki (JP); Hiroyuki Eda, Ibaraki (JP); Hiromi Shimura, Ibaraki (JP); Yuya Ohta, Chiba (JP); Shin Iwasaki, Chiba (JP); Rumi Konno, Ibaraki (JP); Yuga Yamauchi, Chiba (JP); and Riki Fukuhara, Chiba (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 15, 2022, as Appl. No. 18/081,888.
Application 18/081,888 is a continuation of application No. 17/584,961, filed on Jan. 26, 2022, granted, now 11,567,440.
Claims priority of application No. 2021-013701 (JP), filed on Jan. 29, 2021; and application No. 2021-016511 (JP), filed on Feb. 4, 2021.
Prior Publication US 2023/0120867 A1, Apr. 20, 2023
Int. Cl. G03G 15/00 (2006.01); G03G 15/01 (2006.01)
CPC G03G 15/5058 (2013.01) [G03G 15/0131 (2013.01); G03G 15/5041 (2013.01); G03G 15/5062 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming unit configured to form an image on a sheet based on an image density condition for controlling a density of the image, the image forming unit having an image bearing member on which the image is to be formed, a transfer unit configured to transfer the image from the image bearing member onto the sheet, and a fixing unit configured to fix the image to the sheet;
a tray on which the sheet is to be stacked;
a conveyance roller configured to convey the sheet from the fixing unit to the tray;
a detector configured to detect a pattern image on the image bearing member;
a reading unit configured to read a pattern image on the sheet, the reading unit being arranged downstream from the fixing unit in a conveyance direction in which the sheet is conveyed by the conveyance roller; and
a controller configured to:
generate the image density condition based on a detection result of a pattern image on the image bearing member detected by the detector, the pattern image on the image bearing member being formed by the image forming unit,
convert a reading result of a pattern image on the sheet read by the reading unit based on a conversion condition for converting a reading result by the reading unit to a detection result by the detector, the pattern image on the sheet being formed by the image forming unit, and
generate the image density condition based on a converted reading result of the pattern image.