Embodiments of the present disclosure provide a connector for a display device and a relevant display device. The connector includes an input cable interface for connecting an input cable to receive an input mixed signal, a signal processor for processing a first signal in the mixed signal received via the input cable interface to obtain a video signal for display, a signal separator for separating a second signal from the mixed signal and to generate a DC voltage based on the second signal, a video signal output interface for connecting a display interface of the display device to output the video signal, and a power output interface for connecting a power supply interface of the display device to output the DC voltage generated by the signal separator to the display device. Externally-connection interfaces and connection wires are reduced by using one cable to transmit signals of multiple properties.