Communication apparatus and power supply device therefor
AssigneeCanon Kabushiki Kaisha
InventorsYuji Kurosawa, Koichi Abe
Life of this patent
Estimating the term…
Abstract
A power supply device for a communication apparatus includes a main power supply for supplying electric power to respective units of a communication apparatus main body, a main power supply control unit for ON/OFF-controlling the main power supply, and a battery for supplying electric power to the main power supply control unit. When the main power supply is ON, the main power supply control unit receives power supply from the main power supply. When the main power supply is OFF, the main power supply control unit receives power supply from the battery.
Claims13
A power supply device comprising:
- a main power supply for supplying electric power to respective units of an apparatus;
- and
- control means for ON/OFF-controlling said main power supply, said control means being supplied with electric power from said main power supply,
- wherein when an AC input to said main power supply is started, said main power supply is in an ON state and said main power supply automatically supplies the electric power to said control means for a predetermined period of time required for initializing said control means,
- wherein when said control means OFF-controls said main power supply before the elapse of the predetermined period of time, said main power supply is nonetheless maintained in the ON state, but is switched to an OFF state when said control means OFF-controls said main power supply after the predetermined period of time has elapsed.
A power supply device comprising:
- a main power supply for supplying electric power to respective units of an apparatus;
- and
- control means for ON/OFF-controlling said main power supply;
- and
- a battery for supplying electric power to said control means,
- wherein said battery is charged when said main power supply is in an ON condition, and said battery is not charged when said main power supply is in an OFF condition, and
- when said main power supply is OFF, said control means monitors a voltage of said battery, and turns on said main power supply on the basis of the voltage of said battery so as to charge said battery, said control means receiving power from said battery.
Dependencies are inferred from the claim text.