Returning back to normal power mode only after completing a transition to a power saving mode by an image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorKenji Hara
Life of this patent
Estimating the term…
Abstract
It is an object to enable a request received from an outside to be automatically processed immediately before shifting to a power saving state such as a suspend state. On the way of a shift from a normal state to the suspend state and in a state where the shift cannot be interrupted, when a predetermined request such as a print job is received from an external interface, an MFP reserves a return to the normal state by turning on a wake-up reservation flag and continues a suspend process. When shifting to the suspend state, if the wake-up reservation flag is ON, a power supply control unit performs a return (resume) to the normal state even if no wake-up factor occurs.
Claims9
An information processing apparatus which can be shifted between a first power state and a second power state, comprising:
- a network controller configured to receive data from an external device via a network:
- a processor unit configured to process the received data;
- and
- a power supply controller configured to control a power supply to the processor unit so that power is supplied to the processor unit in the first power state but is not supplied to the processor unit in the second power state,
- wherein the network controller and the power supply controller are connected to each other via a signal line,
- wherein the network controller is configured to input, in a case where a predetermined type of data is received by the network controller from the external device in the shift of the information processing apparatus from the first power state to the second power state, a signal to the power supply controller via the signal line in accordance with the reception, and
- wherein the power supply controller is configured to set predetermined data based on the input of the signal, and, after the information processing apparatus come to be in the second power state by the shift, to restart the power supply to the processor unit based on the set predetermined data, so that the processor unit processes the predetermined type of data received in the shift.
A method for controlling an information processing apparatus which is being shifted from a first power state to a second power state, wherein the information processing apparatus has a processor unit, a network controller, and a power supply controller which controls a power supply to the processor unit and is connected to the network controller with a signal line, the method comprising:
- receiving, by the network controller, a predetermined type of data from an external device in the shift of the information processing apparatus from the first power state to the second power state;
- inputting, by the network controller, a signal to the power supply controller via the signal line in accordance with the reception;
- setting, by the network controller, predetermined data based on the input of the signal;
- stopping, by the power supply controller, power supply to the processor unit in accordance with the shift;
- restarting, by the power supply controller, power supply to the processor unit based on the set predetermined data, after the information processing apparatus comes to be in the second power state by the shift;
- and
- processing, by the processor unit to which power supply is restarted, the received predetermined type of data.
Dependencies are inferred from the claim text.