Patent ID: 7461280

Claim:
A recall circuit for quitting a power saving mode and returning to a normal mode, applicable to a television alternatively functioning as a display screen for a computer, comprising: a power regulator; a signal-enabling detecting circuit receiving an enable signal from a remote device and outputting the enable signal; a synchronizing signal detecting circuit receiving a horizontal synchronizing signal and a vertical synchronizing signal from the computer; and a microprocessor electrically coupled to the power regulator, the signal-enabling detecting circuit and the synchronizing signal detecting circuit respectively; wherein, when the microprocessor receives at least one inputting signal from the signal-enabling detecting circuit or the synchronizing signal detecting circuit, the microprocessor controls voltages provided by the power regulator for television to quit the power saving mode and return to the normal mode, and wherein the microprocessor is used to turn on the power, proceed communication via I2c pins, and detect which chips in the television are required to operate at its shift from the power saving mode to the normal mode.