Patent ID: 9395781
Filing Date: 2016-07-19
CPC Classification: G06F

Claim Text:
1. An electronic device capable of communicating with an external device according to a predetermined method, comprising: a power switch operable to receive an operation for switching on and off the electronic device, the power switch being turned off when receiving the operation for switching off and turned on when receiving the operation for switching on; a detector operable to detect a connection between the electronic device and the external device according to the predetermined method; and a requestor operable to request the external device to supply power, wherein when the detector detects the connection between the electronic device and the external device with the power switch being ON, the requestor does not request the external device to supply the power during an establishing process for establishing the communication with the external device, when the detector detects the connection between the electronic device and the external device and the power switch is switched from ON to OFF, the requestor requests the external device to supply the power during the establishing process, the establishing process for establishing the communication with the external device is via a USB enumeration, and when the detector detects the connection between the electronic device and the external device and the power switch is switched from ON to OFF, the requestor requests the external device to supply the power during the USB enumeration by a transmission of a predetermined configuration descriptor which includes information requesting power.