Patent ID: 9578192
Date: 2017-02-21
CPC Classifications: H04N

Claim:
1. An image forming apparatus comprising a plurality of devices driven by power and configured to be operable in: 1) a standby mode in which power is supplied to the plurality of devices and the image forming apparatus stands by a start of an image formation; and 2) a power saving mode in which power supply to a part of the plurality of devices is stopped so that the power consumption of the image forming apparatus in the power saving mode is reduced compared with that of the image forming apparatus in the standby mode, comprising: a door which is opened when consumable material is replaced; a detection unit configured to detect whether or not a replacement of the consumable material is required; a door opened/closed detection unit configured to detect the door opening or door closing both in the standby mode and in the power saving mode; a first power supply configured to supply power to the door opening/closing detection unit when the image forming apparatus is in the power saving mode; a display unit configured to display information; a control unit configured to display a guide to replace the consumable material on the display unit when the door opening is detected by the door opening/closing detection unit in the power saving mode and it is detected by the detection unit that the replacement of the consumable material is required; a second power supply configured to supply power to the control unit; and a power control unit, when the image forming apparatus is in the power saving mode, configured to stop power supply from the second power supply to the control unit when the door opening is not detected by the door opening/closing detection unit, and configured to allow power supply from the second power supply to the control unit when the door opening is detected by the door opening/closing detection unit.