Patent ID: 8229305

Claim:
An image forming apparatus, comprising: a photosensitive member which has a rotatable surface; an image forming unit which is configured to form an image on the photosensitive member; a time measuring unit which is configured to measure a photosensitive member rotation time and a photosensitive member stop time, the photosensitive member rotation time being a period of time elapsed from a time when the photosensitive member starts rotating, the photosensitive member stop time being a period of time elapsed from a time when the photosensitive member stops rotating; a temperature and humidity detector which is configured to detect information about temperature and humidity of a part of an environment of the image forming apparatus; a speed switching unit which is configured to change a rotation speed of the photosensitive member; and a controller which is configured to control an image forming condition of the image forming unit, the controller being configured to determine an image forming condition for a first image formation process based on the photosensitive member rotation time, the photosensitive member stop time, the information about the temperature and humidity, and information about the rotation speed of the photosensitive member of an image formation process that precedes the first image formation process.