US 12,147,169 B2
Image forming apparatus and exposure apparatus for forming image using rod lens array
Hirotaka Seki, Tokyo (JP); and Koichiro Nakanishi, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Feb. 13, 2023, as Appl. No. 18/168,076.
Claims priority of application No. 2022-028384 (JP), filed on Feb. 25, 2022; application No. 2022-138340 (JP), filed on Aug. 31, 2022; and application No. 2023-011220 (JP), filed on Jan. 27, 2023.
Prior Publication US 2023/0273544 A1, Aug. 31, 2023
Int. Cl. G03G 15/04 (2006.01); B41J 2/00 (2006.01); B41J 2/447 (2006.01); B41J 2/45 (2006.01); G02B 27/00 (2006.01); G03G 15/043 (2006.01); G06K 15/00 (2006.01); G06K 15/12 (2006.01)
CPC G03G 15/043 (2013.01) [B41J 2/4473 (2013.01); B41J 2/45 (2013.01); G02B 27/0025 (2013.01); G02B 27/0031 (2013.01); G03G 15/04054 (2013.01); G03G 15/04063 (2013.01); G06K 15/1261 (2013.01); G03G 2215/0409 (2013.01); G03G 2215/0412 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An exposure apparatus comprising:
an exposure head including a plurality of light-emitting elements arranged in a direction intersecting a direction of rotation of a photosensitive body to be rotationally driven, and a rod lens array configured to form an image of light outputted from each of the plurality of light-emitting elements based on image data, on the photosensitive body, and configured to form a latent image on the photosensitive body;
a memory configured to store correction data for correcting a streak image, the correction data including characteristic information indicating an image forming characteristic of the rod lens array; and
at least one processor configured to correct the image data based on the correction data read out from the memory,
wherein the at least one processor is further configured to reduce streak-like density unevenness occurring in the latent image by correcting the image data for driving the plurality of light-emitting elements based on the characteristic information read out from the memory,
wherein the at least one processor is further configured to (1) identify a pixel to be corrected in the image data based on characteristic information and (2) correct pixel data of the identified pixel based on the characteristic information,
wherein the characteristic information includes (1) positional information indicating a position of the pixel to be corrected among a plurality of pixels constituting the image data, and (2) a correction level to be applied to the pixel data of the pixel to be corrected,
wherein the positional information includes information indicating a position of a pixel that is among the plurality of pixels constituting the image data and is first among a series of pixels to be corrected, and
wherein the characteristic information includes the correction level for each of the series of pixels to be corrected.