Power supply device, image forming apparatus, and power...

Details Power supply device, image forming apparatus, and power... Power supply device, image forming apparatus, and power...

2011-05-24

2011-05-24

Patel, Nitin C (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C713S320000, C399S037000, C399S088000, C399S089000, C399S090000

Reexamination Certificate

active

07949885

ABSTRACT:
A power supply device supplies power to an image forming apparatus. The image forming apparatus includes a load and a control unit. The load requires power, and is controlled by the control unit. The power supply includes a capacitor and a power-supply unit. The capacitor is charged by an external power source, and dischargably stores therein power. The power-supply unit provides power supply from the capacitor to the load and the control unit before voltage of the external power source drops below a threshold level where malfunction of the image forming apparatus occurs. After the voltage recovers to the threshold level, the power-supply unit stops the power supply from the capacitor.

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