Proposed is a wireless data transmission method including: detecting an interface of a control signal received from an external device; converting, on the basis of the detected interface, the control signal into a second PP signal having a second frequency band; transmitting and/or receiving the second RF signal; reconverting the second RF signal into the control signal; converting, in a transmitter on the basis of the control signal, a display signal into a first RF signal having a first frequency band distinct from the second frequency band; transmitting and/or receiving the first RF signal; and converting, in a receiver, the received first RF signal into the display signal.