A display device, system having the same, and pixel are disclosed. In one aspect, the display device includes a display panel including a plurality of pixels and a plurality of wireless power receivers. The display device also includes a wireless power transmitter configured to generate and wirelessly transmit power to the wireless power receivers. Each of the wireless power receivers is configured to wirelessly receive the power from the wireless power transmitter and provide a first power supply voltage to the pixels. The display device further includes a power supply configured to generate an initial power supply voltage and provide the initial power supply voltage to the wireless power transmitter.