Patent ID: 7444172

Claim:
A power control device for automatically turning on power to a radio mobile terminal connected to a hands-free kit, comprising: a circuit in said radio mobile terminal comprising a power control signal generator for generating a power control signal to supply power to said radio mobile terminal, a signal output terminal connected to said power control signal generator, for generating a driving signal to enable said power control signal generator, and a signal input terminal connected to a power key of said radio mobile terminal, for receiving a power-on signal; and a circuit in said hands-free kit comprising a power-on signal generator connected between said power key and said signal input terminal, for generating said power-on signal, a signal detector connected between said signal output terminal and said power control signal generator, for detecting said driving signal generated by said signal output terminal, and a controller for controlling said power-on signal generator to generate said power-on signal depending on whether said driving signal generated by said signal output terminal is detected through said signal detector.