A display device includes: a display unit; a plurality of pixels disposed in the display unit, each pixel including first and second blue sub-pixels; and a driving mode controller configured to set a driving mode to one of a first driving mode in which both of the first and second blue sub-pixels emit light, and a second driving mode in which one of the first and second blue sub-pixels emits light, wherein the first blue sub-pixel emits light of a first frequency, and the second blue sub-pixel emits light of a second frequency different from the first frequency.