Patent ID: 7990744

Claim:
A power supply saving system comprising: a power input interface configured to receive an external alternating current (AC) power signal; a power output interface configured to output the AC power signal from the power input interface; a relay comprising a relay switch, the relay switch connected between the power input interface and the power output interface; a relay driving circuit configured to drive the relay; a trigger configured to trigger the relay driving circuit; an alternating current/directing current (AC/DC) converter configured to receive the AC power signal from the power input interface, to transform the AC power signal to a DC power signal to supply power for the relay, the relay driving circuit, and the trigger; and a timing sequence circuit; wherein the timing sequence circuit is capable of controlling the relay driving circuit via the trigger to turn on the relay switch to connect the power input interface to the power output interface in response to the timing sequence circuit receiving a power-on signal from a motherboard of a computer; and the timing sequence circuit is capable of controlling the relay driving circuit via the trigger to turn off the relay switch to cut off connection between the power input interface and the power output interface in response to the timing sequence circuit receiving a power-off signal.