Power-supply control apparatus for image processing apparatus

A power-supply control apparatus comprising:

• power-supply means for supplying power;
• microcomputer for controlling power supply for a load and for said microcomputer itself;
• first switching means for supplying the power from said power-supply means to said microcomputer in accordance with a manual instruction and for outputting a predetermined signal to said microcomputer in accordance with the manual instruction;
• and
• second switching means, controlled by said microcomputer, for supplying the power from said power-supply means to said microcomputer and the load,
• wherein said microcomputer activates said second switching means after said microcomputer has changed its state from which said microcomputer is not supplied with power to which said microcomputer is supplied with the power in response to activation of said first switching means, and said microcomputer deactivates said second switching means in response to the output of the predetermined signal from said first switching means while said second switching means is in an activated state.

A power-supply control apparatus comprising:

• power-supply means for supplying power;
• microcomputer for controlling power supply for said microcomputer itself;
• first switching means for supplying the power from said power-supply means to said microcomputer in accordance with a manual instruction and for outputting a predetermined signal to said microcomputer in accordance with the manual instruction;
• and
• second switching means, controlled by said microcomputer, for supplying the power from said power-supply means to said microcomputer;
• wherein said microcomputer activates said second switching means after said microcomputer is changed its state from which said microcomputer is not supplied with power to which said microcomputer is supplied with the power in response to activation of said first switching means, and said microcomputer deactivates said second switching means in response to the output of the predetermined signal from said first switching means while said second switching means is in an activated state.

An image processing apparatus which comprises:

• a first power-supply section, which is activated automatically in response to operation of a power-supply switch, for supplying operating power to an electronic control circuit which controls operation of the image processing apparatus;
• a second power-supply section for supplying operating power to the components other than said electronic control circuit in accordance with control performed by said electronic control circuit;
• sensing means capable of sensing the operating state of the power-supply switch, and for informing said electronic control circuit of the operating state;
• and
• power-supply control means for activating said second power-supply section when said sensing means senses operation of the power-supply switch at such time that said second power-supply section is in an inactive state, and for deactivating said second power-supply section when said sensing means senses operation of the power-supply switch at such time that said second power-supply section is in an active state.