| 摘要 |
<p>An electronic device and an electronic device system are provided to enable the second electronic device to autonomously control power without depending on the first electronic device while receiving the power from the first device and controlling the power by the first device. A power switch outputs a power switching signal according to user manipulation. The first power input part(210) receives the first power from one of external power devices. The second power input part(220) receives the second power from one of the external power devices. A power transformer(230) transforms the first power into operational power of a voltage level needed for operating each electronic part(300) and supplies the operational power to each electronic part. A power manager(240) outputs an enable signal to keep the power transformer in an enable state in case that the second power is received, and outputs the enable signal for controlling the enable state of the power transformer according to a power switching signal in the case that the second power is not received.</p> |
