US 12,072,643 B2
Image forming apparatus for correcting density unevenness in a scanning direction
Hiroshi Tomii, Chiba (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 30, 2022, as Appl. No. 18/060,519.
Claims priority of application No. 2021-199626 (JP), filed on Dec. 8, 2021.
Prior Publication US 2023/0176497 A1, Jun. 8, 2023
Int. Cl. G03G 15/00 (2006.01); G03G 15/043 (2006.01)
CPC G03G 15/043 (2013.01) [G03G 15/5041 (2013.01); G03G 15/5058 (2013.01); G03G 2215/00042 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming unit including a photosensitive member, a light source configured to expose the photosensitive member to light to form an electrostatic latent image, and a developing roller configured to develop the electrostatic latent image on the photosensitive member; and
a controller configured to
control the image forming unit to form a detection image,
obtain density data regarding density levels of a plurality of areas of the detection image in a scanning direction in which the photosensitive member is scanned with the light from the light source,
generate, based on the density data, a first image forming condition for forming a first test image in which a density unevenness in the scanning direction is adjusted,
generate, based on the density data, a second image forming condition for forming a second test image in which the density unevenness in the scanning direction is adjusted, the second image forming condition being different from the first image forming condition,
control the image forming unit to form the first test image and the second test image, respectively based on the first image forming condition and the second image forming condition,
control the image forming unit to form another test image in which the density unevenness in the scanning direction is adjusted,
obtain selection information indicating a test image selected from among a plurality of test images including the first test image, the second test image, and the another test image, and
control the density unevenness in the scanning direction based on the selection information.