A image display device includes a driving unit that includes a first terminal and a second terminal, and controls current flowing through a light emitting unit based on a potential difference applied between the first terminal and the second terminal. The potential difference is higher than a predetermined drive threshold. The image display device also includes a threshold potential detecting unit that detects the potential difference; a luminance potential supplying unit that changes the potential difference to a value lower than the drive threshold by a luminance potential corresponding to a luminance of the light emitting unit; and a sweep potential supplying unit that controls the driving unit by supplying a sweep potential to the first terminal. The sweep potential is swept in a range between a value lower than the luminance potential and a value higher than the luminance potential.