Power supply controller for use in an image formation apparatus

Details Power supply controller for use in an image formation apparatus Power supply controller for use in an image formation apparatus

1996-10-08

1999-01-19

Braun, Fred L.

Electrophotography

Machine operation

Having power supply

399 37, 399 97, G03G 1500

Patent

active

058624376

ABSTRACT:
A power supply controller for use in an image formation apparatus includes a first control circuit for controlling the image formation apparatus to form an image, a second control circuit for controlling electric power supplied to the image formation apparatus, a first power supply for supplying electric power to the first control circuit, a second power supply for supplying electric power to the second control circuit, and a third power supply for supplying electric power to a load in the image formation apparatus. The apparatus further includes a dew protection switch operable in an on-state and an off-state. The on-state sets an operation mode of the image formation apparatus to prevent dew condensation inside the image formation apparatus. Finally, the apparatus includes a low power consumption mode setting device for setting a low power consumption mode of the image forming apparatus. When the low power consumption mode is set and the dew protection switch is in the on-state, the second control circuit turns off the third power supply and maintains operation of the first and second power supplies. When the dew protection switch is in the off-state, the second control circuit turns off the first and third power supplies and maintains operation of the second power supply.

REFERENCES:
patent: 4113375 (1978-09-01), Murata et al.
patent: 4989039 (1991-01-01), Hayashi et al.
patent: 5420667 (1995-05-01), Kaneko et al.
patent: 5457516 (1995-10-01), Kim
patent: 5670832 (1997-09-01), Takeda

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