Patent ID: 8964240
Filing Date: 2015-02-24
Classification: G03G

Abstract:
1. A method for producing an image forming apparatus, which includes a printhead having multiple light emitting portions, which are arranged at different positions in a uniaxial direction to emit multiple light beams separated from each other in the uniaxial direction; and an image bearing member located on a light path of the multiple light beams, comprising: emitting multiple light beams separated from each other in the uniaxial direction from the multiple light emitting portions; irradiating the image bearing member with the multiple light beams to form an electrostatic latent image on a surface of the image bearing member; forming a visible image on a recording medium based on the electrostatic latent image, wherein the visible image extends in the uniaxial direction; obtaining one of plural pieces of information concerning a property of the multiple light beams at different positions of the visible image in the uniaxial direction, and plural pieces of information concerning lightness of the visible image at different positions of the visible image in the uniaxial direction; calculating a reference value based on either two or more pieces of information among the plural pieces of information at two or more different positions in a predetermined range, which has a predetermined length in the uniaxial direction, or a combination of the two or more pieces of information and information on the two or more different positions; determining a number of pieces of information, which is used for subjecting each of the two or more pieces of information to moving averaging, based on the reference value; when the number of pieces of information is two or more, subjecting each of the two or more pieces of information to moving averaging using the number; and correcting quantities of light beams emitted from two or more light emitting portions of the multiple light emitting portions, which correspond to the two or more different positions in the uniaxial direction, based on the average values obtained by the moving averaging.