A method of driving an OLED display having a plurality of light-emitting display elements having outputs that change with time or use, comprising the steps of: a) providing an external image signal with a first image aspect ratio; b) providing an OLED display having light-emitting display elements formed in a two-dimensional array having a second display aspect ratio different from the first image aspect ratio; c) driving all of the two-dimensional array of display elements with a composite signal comprising the external image signal and an internal aging signal, wherein a subset of the display elements is driven by the external image signal and the remainder of the display elements that are not driven by the external image signal are driven with the internal aging signal; and d) changing the location of the subset of display elements within the two-dimensional array driven by the external image signal over time.