Patent ID: 8203727

Claim:
An image processing apparatus comprising: an input unit adapted to input image data; a storage unit adapted to store image data inputted by the input unit; a first power supply unit adapted to supply power to the storage unit for backing up the image data stored in the storage unit; a second power supply unit adapted to supply power to the storage unit for backing up the image data stored in the storage unit in substitution for the first power supply unit, the second power supply unit including a capacitor to be charged by power supplied from the image processing apparatus; a detecting unit adapted to detect whether or not a communication board is connected to the image processing apparatus, the communication board including a communicating unit for transmitting the image data stored in the storage unit to an external apparatus and for receiving image data to be stored in the storage unit from an external apparatus, a power line unit adapted to receive power from the second power supply unit and to supply power to the second power supply unit in a case where the detecting unit detects that the communication board is connected to the image processing apparatus; and a switching unit adapted to switch a first state in which the first power supply unit supplies power to the storage unit to a second state in which the second power supply unit supplies power to the storage unit in a case where the detecting unit detects that the communication board is connected to the image processing apparatus and the power supplied from the first power supply unit to the storage unit has decreased below a predetermined reference voltage, the first state being a state in which the power line unit supplies power from the first power supply unit to the second power supply unit for charging the second power supply unit, the second state being a state in which the power line unit receives power from the second power supply unit and supplies the received power to the storage unit.