OLED display having thermally conductive backplate
View Patent ↗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.
1. An OLED display comprising:
a) a substrate;
b) 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;
c) an encapsulating cover located over the second electrode; and
d) 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.
2. The OLED display claimed in claim 1 wherein the thermally conductive backplate is made of metal.
3. The OLED display claimed in claim 2 wherein the metal includes one or more elements of the group including aluminum, silver, copper, iron, chromium, or magnesium, or an alloy including at least one of aluminum, silver, copper, iron, chromium, and magnesium.
4. The OLED display claimed in claim 2 wherein the metal is stainless steel.
5. The OLED display claimed in claim 1 wherein the thermally conductive backplate extends to the sides of the encapsulating cover and/or substrate.
6. The OLED display claimed in claim 5 , where the adhesive adheres the backplate to the sides of the cover and/or substrate.
7. The OLED display claimed in claim 1 wherein the OLED display is incorporated within an appliance and the thermally conductive backplate is in thermal contact with the appliance.
8. The OLED display claimed in claim 1 wherein the thermally conductive adhesive is one of the group including adhesive tape and epoxy.
9. The OLED display claimed in claim 1 wherein the thermally conductive adhesive is applied as a liquid.
10. The OLED display claimed in claim 1 wherein the thermally conductive adhesive is sprayed onto either the substrate or encapsulating cover.
11. The OLED display claimed in claim 1 wherein the thermally conductive backplate reduces electromagnetic interference.
12. The OLED display claimed in claim 1 wherein the OLED display is a top-emitting display and the thermally conductive backplate is applied to the substrate.
13. The OLED display claimed in claim 1 wherein the OLED display is a bottom-emitting display and the thermally conductive backplate is applied to the encapsulating cover.
14. The OLED display claimed in claim 1 wherein the thermally conductive backplate has mounting features.
15. The OLED display claimed in claim 14 wherein the mounting features include holes and/or protrusions.
16. The OLED display claimed in claim 15 wherein the holes and/or protrusions are threaded.
17. The OLED display claimed in claim 1 wherein the thermally conductive backplate has a variable thickness.
18. The OLED display claimed in claim 17 wherein at least one surface of the thermally conductive backplate is corrugated.
19. The OLED display claimed in claim 1 , wherein the substrate is made of plastic.
20. The OLED display claimed in claim 1 , wherein the substrate is flexible.
21. The OLED display claimed in claim 1 , wherein the thermally conductive backplate encapsulates the edges of the cover and/or substrate.
22. The OLED display claimed in claim 1 , wherein the backplate is flexible.
23. An OLED display comprising:
a) a substrate;
b) 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;
c) an encapsulating cover located over the second electrode; and
d) a thermally conductive substantially planar backplate extending over an exterior surface of the encapsulating cover or of the substrate adhered thereto with a the thermally conductive adhesive, the backplate having a thermal conductivity higher than that of the substrate or cover, and the adhesive having a thermal conductivity equal to or greater than the thermal conductivity of the cover or substrate to which it is adhered.
24. The OLED display claimed in claim 23 wherein the thermally conductive backplate is made of metal.
25. The OLED display claimed in claim 23 wherein the thermally conductive backplate extends to the sides of the encapsulating cover and/or substrate.
26. The OLED display claimed in claim 25 , where the adhesive adheres the backplate to the sides of the cover and/or substrate.
27. The OLED display claimed in claim 23 wherein the OLED display is a top-emitting display and the thermally conductive backplate is applied to the substrate.
28. The OLED display claimed in claim 23 wherein the OLED display is a bottom-emitting display and the thermally conductive backplate is applied to the encapsulating cover.
29. The OLED display claimed in claim 23 , wherein the substrate is made of plastic.
30. The OLED display claimed in claim 23 , wherein the substrate is flexible.
31. The OLED display claimed in claim 23 , wherein the thermally conductive backplate encapsulates the edges of the cover and/or substrate.
32. The OLED display claimed in claim 23 , wherein the backplate is flexible.