a display panel including a display area that allows images to be displayed, the display area including a first driving area and a second driving area, each of the first and second driving areas having a different number of light emitting pixels per unit area from each other;

a plurality of pixels including a plurality of first pixels disposed in the first driving area and a plurality of second pixels disposed in the second driving area; and

a display controller operatively coupled to the display panel,

wherein when an image having a saturation value equal to or greater than a selected threshold value is displayed in the display area, the display controller varies at least one of the following parameters: a number of light emitting pixels per unit area, a luminance, and saturation of a first boundary driving area between the first driving area and the second driving area,

wherein when an image having a saturation value equal to or greater than the selected threshold value is displayed in the display area, only one or more of a plurality of third pixels disposed in the first boundary driving area emit light, and

wherein the number of light emitting pixels per unit area of the first boundary driving area is greater than a number of light emitting pixels per unit area of the second driving area and is less than a number of light emitting pixels per unit area of the first driving area.