Patent ID: 9280113
Filing Date: 2016-03-08
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: a predicting unit configured to predict an amount of electrostatic charge of toner particles in a developer container; a determining unit configured to determine an exposure condition based on the amount of electrostatic charge of the toner particles predicted by the predicting unit; a storage unit configured to store a gradation conversion table; a converting unit configured to convert image data based on the gradation conversion table stored in the storing unit; an image forming unit configured to form an image based on the converted image data converted by the converting unit, the image forming unit having an image bearing member, an exposure unit configured to expose the image bearing member using light according to the exposure condition determined by the determining unit to form an electrostatic latent image on the image bearing member, and a development unit configured to develop the electrostatic latent image using toner particles; a measuring unit configured to measure a pattern image formed by the image forming unit; a controlling unit configured to control the converting unit to convert pattern image data based on the gradation conversion table, control the exposure unit to expose the image bearing member based on the converted pattern image data using light according to the exposure condition determined by the determining unit to form a pattern image, and control the measuring unit to measure the pattern image; and an updating unit configured to correct the gradation conversion table stored in the storage unit based on the measurement result of the pattern image, and to update the gradation conversion table stored in the storage unit to the corrected gradation conversion table.