Patent ID: 7123475

Claim:
A notebook computer comprising: a computer main body having a first connection port to which electric power is supplied from outside the computer main body; a docking station having a second connection port to which electric power is supplied from outside the docking station, wherein the docking station and the computer main body are electrically connected through a connector; and an AC/DC adapter connected to one of the first connection port of the computer main body and the second connection port of the docking station to supply DC power, the AC/DC adapter comprising: an adapter main body converting AC power into DC power; a DC power cable connected to the adapter main body; a power supplying jack provided at an end of the DC power cable and connected to one of the first connection port of the computer main body and the second connection port of the docking station to supply DC power therethrough; a grounding cable branched off from the DC power cable and forming a grounding path; and a grounding jack provided at an end of the grounding cable and connected to the other one of the first connection port of the computer main body and the second connection port of the docking station to connect the grounding cable and one of grounding areas of the computer main body and the docking station to each other, wherein the connector receives and sends data and DC power between the docking station and the computer main body, and wherein the grounding jack has a grounding conductor and no power supply terminal.