An OLED display comprises a substrate; one or more OLED light emitting elements including a first electrode formed on the substrate, one or more OLED light emissive layers located over the first electrode, and a second electrode located over the OLED light emissive layers; an encapsulating cover located over the second electrode; and a thermally conductive substantially planar backplate extending over an exterior surface of the encapsulating cover or of the substrate and adhered thereto with a thermally conductive adhesive, the backplate having a thermal conductivity higher than that of the substrate or cover, and the adhesive having a thermal conductivity of greater than 0.2 W/mK, or equal to or greater than the thermal conductivity of the cover or substrate to which it is adhered.