Abstract: A power control circuit includes an isolation circuit for receiving a separate image signal and outputting a start signal, and a driving circuit for outputting a direct current (DC) power to start a power module. The other power control circuit includes a first signal generating circuit, for generating a first signal; a second signal generating circuit, for receiving a DC power and outputting a second signal upon receiving a first signal; a driving circuit, for outputting a DC power to start a power module after receiving the second signal; an isolation circuit, for receiving the separate image signal and outputting a start signal; and a control circuit, for outputting a DC power to start the power module after receiving the start signal. The operation of the power control circuit can be suspended, when the display device is in a standby state, thereby reducing power consumption in the standby state significantly.

Abstract: A power control circuit includes an isolation circuit for receiving a separate image signal and outputting a start signal, and a driving circuit for outputting a direct current (DC) power to start a power module. The other power control circuit includes a first signal generating circuit, for generating a first signal; a second signal generating circuit, for receiving a DC power and outputting a second signal upon receiving a first signal; a driving circuit, for outputting a DC power to start a power module after receiving the second signal; an isolation circuit, for receiving the separate image signal and outputting a start signal; and a control circuit, for outputting a DC power to start the power module after receiving the start signal. The operation of the power control circuit can be suspended, when the display device is in a standby state, thereby reducing power consumption in the standby state significantly.

Abstract: A switch circuit is provided for an electric device with a power module. The circuit includes a first signal generating circuit and a second signal generating circuit. The first signal generating circuit issues a first signal, while the second signal generating circuit, connected to the first signal generating circuit, issues a second signal after receiving the first signal. The second signal controls the operation of the power module. Thus the electric device is operable, between being in standby mode and operation mode, through the first signal and the second signal. The switch circuit enables the power module to consume little electric power when the electric device is in standby mode. Only power for the operation of the second signal generating circuit is necessary. Therefore, the power consumption of the electric device in standby mode is greatly reduced.