Display device includes: a power supplying unit which outputs at least a high-side or low-side output potential; an organic EL display unit which includes pixels and receives power supply from the power supplying unit; two or more detecting lines for transmitting a high-side or low-side applied potential applied to two or more pixels; a relay unit which outputs the high-side or low-side applied potentials transmitted by the detecting lines, to output lines fewer in number than the detecting lines; and a regulating unit which regulates at least the high-side or low-side output potential to be outputted by the power supplying unit, such that any one of potential difference between a reference potential and the high-side applied potential from the relay unit, potential difference between the reference potential and the low-side applied potential, and potential difference between the high-side applied potential and the low-side applied potential reaches a predetermined potential difference.