Image forming apparatus for correcting image formation condition

An image forming apparatus comprising:

• an image forming unit that forms an image by forming an electrostatic latent image on an image carrying body, developing the electrostatic latent image by sticking a developer on the image carrying body, and transferring the developer to a recording subject medium;
• a suspension time calculating unit that calculates a suspension time for which image formation by the image forming unit is suspended;
• a correction amount calculating unit that calculates a correction amount for an image formation condition of the image forming unit based on the suspension time calculated by the suspension time calculating unit;
• and
• a cumulatively counting unit that counts a first characteristic value indicating the number of times of image formation by the image forming unit as a cumulative value which is irrelevant to occurrence/non-occurrence of a suspension of image formation, wherein the correction amount calculating unit calculates a correction amount based on the suspension time and the first characteristic value calculated by the cumulatively counting unit.

An image forming apparatus comprising:

• an image forming unit that forms an image by forming an electrostatic latent image on an image carrying body, developing the electrostatic latent image by sticking a developer on the image carrying body, and transferring the developer to a recording subject medium;
• an image forming state detecting unit that detects an image forming state of the image forming unit;
• an image formation condition calculating unit that calculates an image formation condition of the image forming unit that corresponds to the image forming state detected by the image forming state detecting unit;
• a cumulatively counting unit that counts a first characteristic value indicating the number of times of image formation by the image forming unit as a cumulative value, which is irrelevant to occurrence/non-Occurrence of a suspension of image formation;
• a first correction amount calculating unit that calculates a first correction amount for the image formation condition based on the first characteristic value counted by the cumulatively counting unit;
• a consecutively counting unit that counts a second characteristic value indicating the number of times images is formed consecutively by the image forming unit without a suspension;
• a suspension time calculating unit that calculates a suspension time for which image formation by the image forming unit has been suspended;
• a second characteristic value correcting unit that corrects the second characteristic value counted by the consecutively counting, unit based on the suspension time calculated by the suspension time calculating unit;
• and
• a second correction amount calculating unit that calculates a second correction amount for the image formation condition based on the second characteristic value corrected by the second characteristic value correcting unit.