OLED displays are made up of a layer of organic material placed between two conductors. These two conductors (an anode and a cathode) are then placed between a glass top plate (seal) and a glass bottom plate (substrate). When an electric current is applied to the two conductors, the organic material produces a bright, electro-luminescent light. When energy passes from the negatively charged layer (cathode) to the other (anode) layer; it stimulates the organic material between the two, which in turn, emits light that’s visible through the outermost layer of glass.