Patent ID: 7711275

Claim:
An image forming apparatus comprising: image information acquisition means for acquiring image information; visible image forming means for forming a visible image on a surface of an image carrier in accordance with the image information; control means for measuring imaging performance of the visible image forming means in response to a start of a power supply from a power source and for controlling execution of an imaging condition setting control for setting imaging conditions based on, at least, the measured result; and information output means for determining and outputting signal information corresponding to factors affecting formation of the visible image on the surface of the image carrier by the visible image forming means, wherein the control means includes non-volatile information storage means for storing information and retaining stored information even when the supply of power from the power source has been interrupted, stores, in the non-volatile information storage means, signal information output from the information output means when executing the imaging condition setting control, and controls execution of the imaging condition setting control further based on both previous signal information stored in the non-volatile information storage means and a current signal information output from the information output means, and wherein the control means further includes timing means for timing an elapsed time since either an acquisition of image information by the image information acquisition means finishes or an image forming operation is finished; judgment means for judging whether or not power supply to the control means from the power source is to be cutoff in accordance with the timed result of the timing means, and power disconnection means for disconnecting the power supply to the control means from the power source in accordance with the control signal from the control means, and wherein the control means is further configured to control an input of the image information to the image information acquisition means and the power disconnection means in accordance with the judgment result of the judgment means.