US 11,988,973 B2
Image forming apparatus
Hiroshi Kita, Mishima (JP); and Kazuhiro Funatani, Kawasaki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 1, 2022, as Appl. No. 17/683,794.
Application 17/683,794 is a continuation of application No. 17/177,463, filed on Feb. 17, 2021, granted, now 11,287,759.
Application 17/177,463 is a continuation of application No. 16/397,435, filed on Apr. 29, 2019, granted, now 10,948,842, issued on Mar. 16, 2021.
Claims priority of application No. 2018-090100 (JP), filed on May 8, 2018.
Prior Publication US 2022/0187730 A1, Jun. 16, 2022
Int. Cl. G03G 15/01 (2006.01); G03G 15/00 (2006.01); G03G 15/06 (2006.01)
CPC G03G 15/0152 (2013.01) [G03G 15/0121 (2013.01); G03G 15/065 (2013.01); G03G 15/5008 (2013.01); G03G 15/556 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An image forming apparatus having an image forming portion capable of forming an image on a recording material using developer images of a plurality of colors including a first color which is black and a second color which is a color other than black, the image forming apparatus comprising:
a data generator which generates first image data for forming a developer image of the first color and second image data for forming a developer image of the second color; and
a unit which superimposes and forms developer images of a plurality of colors based on the first image data and the second image data generated by the data generator, wherein
the image forming portion includes:
a first image bearing member corresponding to the first color;
a second image bearing member corresponding to the second color;
a first light-emitting unit which irradiates a surface of the first image bearing member with light and which forms an electrostatic latent image based on the first image data;
a second light-emitting unit which irradiates a surface of the second image bearing member with light and which forms an electrostatic latent image based on the second image data;
a first developing member which supplies a developer to the electrostatic latent image formed on the first image bearing member; and
a second developing member which supplies a developer to the electrostatic latent image formed on the second image bearing member,
wherein the image forming portion operates in a normal mode and a wide color gamut mode, with a developer supply capability from the second developing member to the second image bearing member in the wide color gamut mode being greater than that in the normal mode,
wherein when operating in the wide color gamut mode, the data generator generates:
(i) image data of the second color in gray image or black image corresponding to an image portion indicated by the first image data or image data of a plurality of colors constituting the second color in the gray image or the black image corresponding to the image portion, and
(ii) image data in the gray image or the black image formed by the first color and the second color, in which a ratio of a proportion of the second color to a proportion of the first color is greater than the ratio of a proportion of the second color to a proportion of the first color in the normal mode, corresponding to an image portion indicated by the first image data.