US 12,265,339 B2
Image forming apparatus, control method thereof, and storage medium for correcting variations in light amount from light source
Masashi Oya, Saitama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 2, 2023, as Appl. No. 18/116,360.
Claims priority of application No. 2022-032853 (JP), filed on Mar. 3, 2022.
Prior Publication US 2023/0280672 A1, Sep. 7, 2023
Int. Cl. G06F 3/12 (2006.01); G03G 15/01 (2006.01); G03G 15/04 (2006.01); G03G 15/043 (2006.01); H04N 1/401 (2006.01); H04N 1/405 (2006.01)
CPC G03G 15/043 (2013.01) [G03G 15/0115 (2013.01); G03G 15/04027 (2013.01); G03G 15/04054 (2013.01); G06F 3/1208 (2013.01); G06F 3/1254 (2013.01); G03G 2215/0407 (2013.01); G03G 2215/047 (2013.01); H04N 1/4015 (2013.01); H04N 1/405 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electrophotographic image forming apparatus that utilizes a line head in which a plurality of light-emitting elements is arranged as a light source, the apparatus comprising:
a processor and a memory, the processor configured to cause, by executing a computer program stored in the memory, the electrophotographic image forming apparatus to:
obtain print data for the electrophotographic image forming apparatus to perform printing;
perform halftone processing for the obtained print data;
generate a plurality of pieces of correction information for correcting variations of light amount on a photosensitive body by light radiated from the plurality of light-emitting elements; and
correct the print data for which the halftone processing has been performed by using the correction information, wherein
the plurality of pieces of correction information includes a first profile for correcting the variations of light amount resulting from the light-emitting elements, a second profile for correcting the variations of light amount resulting from an individual difference of a current source of the light-emitting elements, and a third profile for correcting the variations of light amount resulting from a positional relationship between the line head and the photosensitive body.