Display device and method of manufacturing the same
A display device includes a substrate; a light-emitting element layer on the substrate; a first thin-film encapsulation layer that is on the light-emitting element layer, has an upper surface conforming an upper surface of the light-emitting element layer, and includes a recessed portion; a bank layer on the first thin-film encapsulation layer and having an opening overlapping the recessed portion; a wavelength conversion layer in the opening on the first thin-film encapsulation layer and at least partially in the recessed portion; a first inorganic layer on the bank layer and the wavelength conversion layer; an organic layer on the first inorganic layer; and a second inorganic layer on the organic layer.
1. A display device comprising:
a substrate comprising a display area in which a plurality of pixels are located;
a pixel-defining film arranged along a boundary of a pixel of the plurality of pixels;
a light-emitting element layer on the substrate;
a first thin-film encapsulation layer that is on the light-emitting element layer, has an upper surface conforming to an upper surface of the light-emitting element layer, and comprises a recessed portion;
a bank layer on the first thin-film encapsulation layer and having an opening overlapping the recessed portion, the first thin-film encapsulation layer being between the pixel-defining film and the bank layer;
a wavelength conversion layer in the opening on the first thin-film encapsulation layer and at least partially in the recessed portion;
a first inorganic layer on the bank layer and the wavelength conversion layer;
an organic layer on the first inorganic layer; and
a second inorganic layer on the organic layer.
2. The display device of claim 1 , wherein the first thin-film encapsulation layer is substantially uniform in thickness.
3. The display device of claim 2 , wherein a lower surface of the wavelength conversion layer conforms to the upper surface of the light-emitting element layer.
4. The display device of claim 1 , wherein the substrate further comprises a non-display area around the display area, and
wherein the first inorganic layer and the second inorganic layer contact each other in the non-display area.
5. The display device of claim 4 , wherein the first thin-film encapsulation layer and the first inorganic layer contact each other in the non-display area.
6. The display device of claim 1 ,
wherein the pixel-defining film is arranged along a boundary of each of the pixels and partially overlaps the bank layer.
7. The display device of claim 1 , wherein a width of the opening decreases toward an upper side.
8. The display device of claim 7 , wherein the bank layer comprises a partition wall having a reverse-tapered structure.
9. The display device of claim 1 , wherein the opening and the recessed portion are spatially connected to each other.
10. A display device comprising:
a substrate;
a light-emitting element layer on the substrate;
a first thin-film encapsulation layer that is on the light-emitting element layer, has an upper surface conforming to an upper surface of the light-emitting element layer, and comprises a recessed portion;
a bank layer on the first thin-film encapsulation layer and having an opening overlapping the recessed portion;
a wavelength conversion layer in the opening on the first thin-film encapsulation layer and at least partially in the recessed portion;
a first inorganic layer on the bank layer and the wavelength conversion layer;
an organic layer on the first inorganic layer; and
a second inorganic layer on the organic layer,
wherein the wavelength conversion layer comprises a concave upper surface.
11. The display device of claim 10 , wherein a refractive index of the first inorganic layer is lower than a refractive index of the wavelength conversion layer.
12. A display device comprising:
a substrate comprising an area in which a plurality of pixels are located;
a pixel-defining film arranged along a boundary of each of the pixels;
a light-emitting element layer on the substrate so as to cover the pixel-defining film;
a first thin-film encapsulation layer on the light-emitting element layer, the first thin-film encapsulation layer comprising a recessed portion not overlapping the pixel- defining film in a thickness direction of the substrate;
a wavelength conversion layer on the first thin-film encapsulation layer, the wavelength conversion layer being at least partially in the recessed portion;
a first inorganic layer on the wavelength conversion layer;
an organic layer on the first inorganic layer; and
a second inorganic layer on the organic layer,
wherein the wavelength conversion layer comprises a concave upper surface.
13. The display device of claim 12 , wherein an upper surface of the first thin-film encapsulation layer conforms to an upper surface of the light-emitting element layer.
14. The display device of claim 12 , wherein the first thin-film encapsulation layer is substantially uniform in thickness.
15. The display device of claim 14 , wherein a lower surface of the wavelength conversion layer conforms to an upper surface of the light-emitting element layer.
16. A display device comprising:
a substrate comprising an area in which a plurality of pixels are located;
a pixel-defining film arranged along a boundary of each of the pixels;
a light-emitting element layer on the substrate so as to cover the pixel-defining film:
a first thin-film encapsulation layer on the light-emitting element layer, the first thin-film encapsulation layer comprising a recessed portion not overlapping the pixel- defining film in a thickness direction of the substrate;
a wavelength conversion layer on the first thin-film encapsulation layer, the wavelength conversion layer being at least partially in the recessed portion;
a first inorganic layer on the wavelength conversion layer;
an organic layer on the first inorganic layer;
a second inorganic layer on the organic layer; and
a bank layer on the first thin-film encapsulation layer, the bank layer having an opening partially overlapping the recessed portion and spatially connected thereto,
wherein at least a portion of the wavelength conversion layer is in the opening.
17. The display device of claim 16 , wherein a width of the opening decreases toward an upper side.
18. The display device of claim 17 , wherein the bank layer comprises a partition wall having a reverse-tapered structure.
19. A method of manufacturing a display device, the method comprising:
providing a substrate comprising a display area in which a plurality of pixels are to be located; forming a pixel-defining film along a boundary of a pixel of the plurality of pixels; forming a light-emitting element layer on the substrate;
forming a first thin-film encapsulation layer, on the light-emitting element layer, having an upper surface conforming to an upper surface of the light-emitting element layer and comprising a recessed portion;
forming a bank layer having an opening on the first thin-film encapsulation layer, the first thin-film encapsulation layer being between the pixel-defining film and the bank layer;
inkjet printing a wavelength conversion layer on the recessed portion and the opening;
forming a first inorganic layer on the bank layer and the wavelength conversion layer;
forming an organic layer on the first inorganic layer; and
forming a second inorganic layer on the organic layer.
20. The method of claim 19 , wherein the opening exposes the recessed portion, and wherein the bank layer comprises a partition wall having a reverse-tapered structure.