Light-emitting device with supported cover
View Patent ↗A light-emitting device is described with a flat light-emitting element on a substrate and is encapsulated under a cover. The cover is supported by at least one support element in a central section at a distance from the edge of the light-emitting element. Further provided are indentations in the surface facing the light-emitting element, in which is a cavity containing a getter material. At the boundary, the cover is sealed to the substrate with a sealing compound.
1. A light-emitting device, comprising:
a substrate having a flat light-emitting element;
a cover, wherein the light-emitting element is sealed between the substrate and the cover, the cover having at least one indentation facing the substrate and which together with the substrate encloses a cavity;
a getter material inside the cavity, on the cover; and
at least one support element in a central support section at a distance from an edge of the light-emitting element, wherein
the at least one support element and cover are formed of the same material, the at least one support element is an integral component of the cover and any active region of the light-emitting element is not contacted by the support element, the at least one support element is located in an inactive area of the light-emitting element and the light-emitting element is continuous and extends below the at least one support element in a direction toward the substrate.
2. The device according to claim 1 , wherein the light-emitting element is an OLED.
3. The device according to claim 1 , wherein between the cover and the substrate at the outer edge of the cover is a sealed section, which is free of the light-emitting element and wherein in the sealed section is a sealing compound, which seals the cover to the substrate.
4. The device according to claim 3 , wherein the cavity is located directly next to the sealed section.
5. The device according to claim 3 , wherein the support element is seated at the center of the central support section, the device further comprising an organic, inorganic or mixed buffer layer in the support section between the support element and the light-emitting element.
6. The device according to claim 5 , wherein the support section is located at a distance from the outer edge of the light-emitting element along an entire boundary, wherein located in the boundary between the sealed section and the support section is the indentation, which defines the cavity.
7. The device according to claim 5 , wherein the sealing compound and the buffering layer consist of the same material.
8. The device according to claim 1 , wherein the substrate and the cover each include a glass layer.
9. The device according to claim 1 , wherein the getter material is an oxidizable material, which reacts with and binds oxygen and moisture.
10. The device according to claim 1 , wherein the substrate is at least partially transparent to the light emitted by the light-emitting element.
11. The device according to claim 1 , wherein the cover includes a glass layer, into which the at least one indentation has been embossed.
12. The device according to claim 1 , wherein multiple support elements are distributed at equal distances across the cover.
13. The device according to claim 12 , wherein the support elements have a cross-section that tapers in the direction of the light-emitting element.
14. The device according to claim 1 , wherein the light-emitting element is structured into partitions, which are configured to be electrically driven independently of each other.
15. The device according to claim 14 , wherein the partitions have structuring areas that are unable to emit light and the support elements are located in the area of the structuring areas.
16. The device according to claim 1 , wherein the cover has on a side facing the substrate a glass layer, into which a plurality of indentations are etched, forming a plurality of support elements.
17. The device according to claim 1 , wherein the cover has around the sealed section on the surface facing the substrate a bead, which is at least raised above the at least one indentation.
18. The device according to claim 17 , wherein the bead extends further from a main surface of the cover than the support elements.
19. A light-emitting device, comprising:
a substrate having a flat light-emitting element;
a cover, wherein the light-emitting element is sealed between the substrate and the cover, the cover having at least one indentation facing the substrate and which together with the substrate encloses a cavity;
a getter material inside the cavity, on the cover; and
at least one support element in a central support section being seated at the center of the central support section, the device further comprising an organic, inorganic or mixed buffer layer in the support section between the at least one support element and the light-emitting element, wherein the at least one support element has a bearing area disposed along the entire support section and substantially matching the footprint of the light-emitting element and the light-emitting element is completely covered by the buffer layer and the at least one support element.
20. The device according to claim 19 , wherein the light-emitting element is an OLED.
21. The device according to claim 19 , wherein between the cover and the substrate at the outer edge of the cover is a sealed section, which is free of the light-emitting element and wherein in the sealed section is a sealing compound, which seals the cover to the substrate.
22. The device according to claim 21 , wherein the cavity is located directly next to the sealed section.
23. The device according to claim 21 , wherein the support element is seated at the center of the central support section, the device further comprising an organic, inorganic or mixed buffer layer in the support section between the support element and the light-emitting element, wherein the support section is located at a distance from the outer edge of the light-emitting element along an entire boundary, wherein located in the boundary between the sealed section and the support section is an indentation, which defines the cavity.
24. The device according to claim 21 , wherein the support element is seated at the center of the central support section, the device further comprising an organic, inorganic or mixed buffer layer in the support section between the support element and the light-emitting element, wherein the sealing compound and the buffering layer consist of the same material.
25. The device according to claim 19 , wherein the substrate and the cover each include a glass layer.
26. The device according to claim 19 , wherein the getter material is an oxidizable material, which reacts with and binds oxygen and moisture.
27. The device according to claim 19 , wherein the substrate is at least partially transparent to light emitted by the light-emitting element.
28. The device according to claim 19 , wherein the cover includes a glass layer, into which the at least one indentation has been embossed.
29. The device according to claim 19 , wherein the at least one support element is made of the same material as the cover, and is an integral component of the cover.
30. The device according to claim 19 , wherein the at least one support element is joined to the cover by gluing, casting, or welding.
31. The device according to claim 19 , wherein the cover has around the sealed section on the surface facing the substrate a bead, which is at least raised above the at least one indentation.
32. The device according to claim 31 , wherein the bead extends further from a main surface of the cover than the support elements.