A display device includes a driving unit which outputs a driving signal, and a display panel which displays an image with at least red light, green light, and blue light in response to the driving signal where the blue light includes first color light and second color light, and a peak wavelength of the first color light is about 390 nanometers (nm) to about 410 nm and a peak wavelength of the second color light is about 480 nm to about 491 nm.