Organic light emitting diode (OLED) display and method of producing OLED display

A device, comprising

• an organic light emitting diode (OLED) display;
• wherein the display comprises a transparent or semi-transparent substrate;
• wherein the substrate includes a first region comprising a plurality of first pixels and a second region comprising a plurality of second pixels;
• wherein a first proportion of each first pixel comprises a first light emissive area, and a second proportion of each second pixel comprises a second light emissive area, wherein the first proportion is different to the second proportion;
• wherein a non-zero third proportion of each first pixel comprises a transparent or semi-transparent area, and a non-zero fourth proportion of each second pixel comprises a transparent or semi-transparent area;
• wherein the first proportion comprises a ratio of a size of the first light emissive area to a size of each first pixel;
• and
• wherein the second proportion comprises a ratio of a size of the second light emissive area to a size of each second pixel.