Color image forming apparatus

摘要

The color image forming apparatus includes a CPU configured to correct a result of detecting a toner patch by a density sensor based on a result of detecting a first white reference plate by the density sensor, and to control a density or chromaticity of a toner image based on a result of detecting the toner patch by the density sensor corrected by the CPU. The CPU is configured to further correct the result of detecting the first white reference plate by the density sensor based on a result of detecting, by the density sensor, a second white reference plate for correcting the first white reference plate. With this configuration, a correction of a sensor output is performed with high accuracy, and detection accuracy of the density or the chromaticity by the sensor is enhanced.

主权项

1. A color image forming apparatus, comprising:
an image forming unit configured to form a toner image on a transfer material; a fixing device configured to fix the toner image formed on the transfer material by the image forming unit; a detector configured to detect the toner image fixed onto the transfer material by the fixing device; a first reference configured to correct a detection result of the toner image detected by the detector; and a correction unit configured to calculate a first correction result by correcting a detection result of the first reference detected by the detector, based on a detection result of a second reference detected by the detector, calculate a second correction result by correcting a detection result of the toner image detected by the detector, based on the first correction result, and control density or chromaticity of the toner image formed by the image forming unit based on the second correction result, wherein the first reference is arranged to oppose the detector, wherein the second reference is capable of being placed at a place where the first reference is removed, and wherein after the second reference is detected by the detector, the first reference is capable of being placed at the place where the first reference was removed after the second reference is removed.