An electronic device is provided. The device comprises a display module comprising an active area configured to emit light, and a window layer attached to the display module. The window layer comprises: a transparent area positioned above at least the active area of the display module, an area extending outwards relative to the active area of the display module, and an optical pattern configured to direct the light emitted by the active area of the display module near the edges of the active area towards the area of the window layer extending outwards.