| 摘要 |
A power supply returning apparatus is applied to an electronic device. The electronic device comprises a first power supply input port and a second power supply input port. The power supply returning apparatus comprises: a power supply input determining module, used for determining whether a power supply is input in the first power supply input port of the electronic device, and whether no power supply is input in the second power supply input port, and if a determining result is that: a power supply is input in the first power supply input port, and no power supply is input in the second power supply input port, sending a control signal to a switch control module; and the switch control module, used for controlling a switch apparatus according to the control signal, so that the energy of the power supply input in the first power supply input port is reversely output from the second power supply input port, to supply power for another electronic device. By using the technology, the electronic device directly supplies power for the another electronic device, so that, on one hand, the cost is saved, and on the other aspect hand, it is simple and convenient. |
