LIGHT EXTRACTION APPARATUS AND FLEXIBLE OLED DISPLAYS

A light extraction apparatus includes a flexible substrate, an OLED supported by the flexible substrate, a flexible barrier film, a tapered reflector, and an index-matching layer. The tapered reflector includes at least one side surface, a top surface coupled to the flexible barrier film, and a bottom surface. The top surface is larger in surface area than the bottom surface. The index-matching layer is coupled between a top surface of the OLED and the bottom surface of the tapered reflector. Light emitted from the top surface of the OLED passes through the index-matching layer and into the tapered reflector. The at least one side surface of the tapered reflector includes a slope to redirect the light by reflection into an escape cone and out of the top surface of the tapered reflector.