Patent ID: 9285742
Filing Date: 2016-03-15
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: an image bearing member; a correction unit that corrects an amount of light for at least one portion of scanning positions along a main scanning direction; an exposure unit configured to form electrostatic latent images by irradiating light on the image bearing member based on the amount of light corrected by the correction unit, the light including a first light amount and a second light amount; a forming unit configured to form (i) a first toner patch with the first light amount and (ii) a second toner patch with the second light amount, the first and second toner patches being formed on the image bearing member on the basis of the electrostatic latent images formed by the exposure unit; a detection unit configured to detect (i) a density of the first toner patch and (ii) a density of the second toner patch; and a control unit configured to change at least one setting of the correction unit based on the detection results by the detection unit, the at least one setting being for correcting the amount of light for each scanning position along the main scanning direction, wherein the control unit controls the correction unit to change a part of the at least one setting before a latent image corresponding to the second toner patch is formed, the part of the at least one setting being less than all of the at least one setting and the part of the at least one setting corresponding to at least a position for the second toner patch.