Curved display device
A curved display device is disclosed. In one aspect, the display device includes a substrate comprising a flat portion and at least one curved portion, a display unit comprising a first display area on the flat portion, and a second display area on the curved portion, and a thin-film encapsulating layer sealing the display unit, and comprising at least one organic layer and at least one inorganic layer. The display device also includes a functional layer over the thin-film encapsulating layer, wherein the thin-film encapsulating layer comprises a first region overlapping the curved portion, and a second region overlapping the flat portion. The inorganic layer contacts the functional layer, and wherein the inorganic layer has a first surface roughness in the first region different from a second surface roughness in the second region.
1. A curved display device comprising:
a substrate comprising a flat portion and at least one curved portion;
a display unit comprising a first display area on the flat portion, and a second display area on the curved portion;
a thin-film encapsulating layer sealing the display unit, and comprising at least one organic layer and at least one inorganic layer; and
a functional layer over the thin-film encapsulating layer,
wherein the thin-film encapsulating layer comprises a first region overlapping the curved portion, and a second region overlapping the flat portion, and
wherein the inorganic layer contacts the functional layer, and wherein the inorganic layer has a first surface roughness in the first region different from a second surface roughness in the second region.
2. The curved display device of claim 1 , wherein the first surface roughness is greater than the second surface roughness.
3. The curved display device of claim 2 , wherein the root mean square (RMS) of the first surface roughness is about 5 nm to about 30 mm.
4. The curved display device of claim 2 , wherein the RMS of the first surface roughness is about 5 nm to about 20 nm.
5. The curved display device of claim 2 , wherein, in the first region, the inorganic layer comprises a concave-convex structure on a surface of the inorganic layer.
6. The curved display device of claim 2 , wherein, in the first region, the inorganic layer comprises a first layer and a second layer over the first layer, and wherein the first layer has a density greater than that of the second layer.
7. The curved display device of claim 6 , wherein the second layer has a thickness that gradually decreases toward the second region.
8. The curved display device of claim 1 , wherein the functional layer comprises a polarizing layer or a touchscreen layer.
9. The curved display device of claim 1 , wherein the display unit comprises a thin-film transistor and a display device electrically connected to the thin-film transistor, and
wherein the display device is an organic light-emitting device comprising a first electrode electrically connected to the thin-film transistor, a second electrode facing the first electrode, and an intermediate layer interposed between the first electrode and the second electrode.
10. The curved display device of claim 1 , wherein the second display area directly extends from the first display area.
11. A curved display device comprising:
a substrate comprising a flat portion and at least one curved portion directly extending from the flat portion;
a display unit over the substrate; and
a thin-film encapsulating layer sealing the display unit, and comprising a plurality of organic layers and a plurality of inorganic, layers which are alternately stacked,
wherein the outermost inorganic layer of the inorganic layers comprises a first region overlapping the curved portion and a second region overlapping the flat portion, and
wherein the outermost inorganic layer has a first surface roughness in the first region different from a second surface roughness in the second region.
12. The curved display device of claim 11 , further comprising a functional layer over the thin-film encapsulating layer, wherein the outermost inorganic layer contacts the functional layer.
13. The curved display device of claim 12 , wherein the functional layer comprises a polarizing layer or a touchscreen layer.
14. The curved display device of claim 11 , wherein, in the first region, the outermost inorganic layer comprises a concave-convex structure on a surface of the inorganic layer.
15. The curved display device of claim 11 , wherein, in the first region, the outermost inorganic layer comprises a first layer and a second layer over the first layer, and wherein the first layer has a density greater than that of the second layer.
16. The curved display device of claim 15 , wherein the second layer has a thickness that gradually decreases toward the second region.
17. The curved display device of claim 11 , wherein the root mean square (RMS) of the first surface roughness is about 5 nm to about 30 nm.
18. The curved display device of claim 11 , wherein the RMS of the first surface roughness is about 5 nm to about 20 nm.
19. The curved display device of claim 11 , wherein the display unit comprises a first display area on the flat portion and a second display area on the curved portion and directly extending from the first display area.
20. The curved display device of claim 19 , wherein each of the first and second display areas comprises a thin-film transistor and a display device electrically connected to the thin-film transistor, and
wherein the display device is an organic light-emitting device comprising a first electrode electrically connected to the thin-film transistor, a second electrode facing the first electrode, and an intermediate layer interposed between the first and second electrodes.