Optical filter and display device including the same
An optical filter includes a substrate including a plurality of pixel areas spaced apart from each other and a light-blocking area between the plurality of pixel areas, a plurality of color filters arranged on a first surface of the substrate and corresponding to the plurality of pixel areas, and a plurality of conversion layers arranged on the first surface of the substrate and corresponding to the plurality of color filters. Each of the conversion layers includes inclined side surfaces. The optical filter further includes a reflective layer on the inclined side surfaces of each of the plurality of conversion layers. The reflective layer extends to the light-blocking area and is arranged consecutively on two adjacent inclined side surfaces from among the inclined side surfaces of the plurality of conversion layers and the light-blocking area between the two adjacent inclined side surfaces.
1. A display device, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
a plurality of light-emitting devices disposed on the first substrate;
an encapsulation layer disposed on the plurality of light-emitting devices and comprising at least one inorganic layer and at least one organic layer;
a plurality of conversion layers disposed on the encapsulation layer and configured to convert light emitted from the plurality of light-emitting devices into light of different colors;
a first layer disposed on the plurality of conversion layers;
a color filter layer disposed between the second substrate and the first layer,
wherein the color filter layer comprises:
a first color filter, a second color filter, and a third color filter, in a plan view, overlapping the plurality of conversion layers and allowing light of different colors to pass therethrough; and
partition walls in which a first color layer comprising a same material as the first color filter, a second color layer comprising a same material as the second color filter, and a third color layer comprising a same material as the third color filter overlap each other, the partition walls being respectively disposed between the first to third color filters; and
a planarization layer disposed over the partition walls and the plurality of conversion layers and covering the partition walls and the plurality of conversion layers.
2. The display device of claim 1 , wherein the first layer has a refractive index less than a refractive index of each of the plurality of conversion layers.
3. The display device of claim 2 , wherein the first layer comprising an inorganic material or an organic material.
4. The display device of claim 2 , wherein the refractive index of the first layer is less than about 1.4.
5. The display device of claim 4 , wherein the refractive index of the first layer is equal to less than about 1.2.
6. The display device of claim 1 , further comprising a barrier layer disposed between the first layer and the plurality of conversion layers.
7. The display device of claim 6 , wherein the barrier layer comprises silicon nitride (SiN X ) and/or silicon oxide (SiO X ).
8. The display device of claim 1 , wherein the encapsulation layer comprises a structure in which a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer are stacked.
9. The display device of claim 1 , further comprising a filling layer disposed between the planarization layer and the encapsulation layer.
10. The display device of claim 1 , wherein
the plurality of conversion layers comprises first to third conversion layers, respectively overlapping the first to third color filters,
each of the first to third conversion layers comprises scattering particles,
the first conversion layer further comprises first quantum dots, and
the second conversion layer further comprises second quantum dots, the second quantum dots comprising a same material as the first quantum dots and having different sizes from the first quantum dots.
11. The display device of claim 1 , further comprising a pixel-defining layer disposed between the plurality of light-emitting devices,
wherein the partition walls overlap the pixel-defining layer.
12. The display device of claim 1 , further comprising a reflective layer disposed on the at least one side surface of each of the plurality of conversion layers.
13. A display device, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
a plurality of light-emitting devices disposed on the first substrate;
an encapsulation layer disposed on the plurality of light-emitting devices and comprising at least one inorganic layer and at least one organic layer;
a plurality of conversion layers disposed on the encapsulation layer and configured to convert light emitted from the plurality of light-emitting devices into light of different colors;
a first layer disposed on the plurality of conversion layers;
a color filter layer disposed between the second substrate and the first layer,
wherein the color filter layer comprises:
a first color filter, a second color filter, and a third color filter, in a plan view, overlapping the plurality of conversion layers and allowing light of different colors to pass therethrough; and
partition walls in which a first color layer comprising a same material as the first color filter, a second color layer comprising a same material as the second color filter, and a third color layer comprising a same material as the third color filter overlap each other, the partition walls being respectively disposed between the first to third color filters; and
a reflective layer disposed on the at least one side surface of each of the plurality of conversion layers,
wherein the reflective layer is further disposed on the partition walls and connects between two adjacent side surfaces from among the side surfaces of the plurality of conversion layers.
14. A display device, comprising:
a light-emitting panel configured to emit light of a single color;
an optical filter configured to convert the light of a single color into light of different colors; and
an insulating layer disposed between the light-emitting panel and the optical filter, the insulating layer comprising a material having transmissibility,
wherein the optical filter comprises:
first to third color filters disposed on a substrate;
partition walls respectively disposed between the first to third color filters;
first to third conversion layers disposed on the first to third color filters to overlap the first to third color filters, respectively,
a first layer disposed between the first to third conversion layers and the first to third color filters,
wherein the first layer forms recesses between adjacent conversion layers among the first to third conversion layers; and
a planarization layer disposed over the partition walls and the first to third conversion layers,
wherein the partition walls are areas in which a first color layer, a second color layer and a third color overlap each other, the first color layer comprising a same material as the second color filter, the second color layer comprising a same material as the second color filter, and the third color layer comprising a same material as the third color filter,
wherein at least two of the first color layer, the second color layer and the third color layer that overlap each other are disposed in the recesses formed between the adjacent conversion layers.
15. The display device of claim 14 , wherein the first layer is further disposed on the partition walls.
16. The display device of claim 14 , wherein the first layer comprises an inorganic material or an organic material.
17. The display device of claim 14 , wherein the refractive index of the first layer is less than about 1.4.
18. The display device of claim 17 , wherein the refractive index of the first layer is equal to less than about 1.2.
19. The display device of claim 14 , further comprising a barrier layer disposed between the first layer and the first to third conversion layers.
20. The display device of claim 19 , wherein the barrier layer comprises silicon nitride (SiN X ) and/or silicon oxide (SiO X ).
21. The display device of claim 14 , wherein
each of the first to third conversion layers comprises scattering particles,
the first conversion layer further comprises first quantum dots, and
the second conversion layer further comprises second quantum dots, the second quantum dots comprising a same material as the first quantum dots and having different sizes from the first quantum dots.
22. The display device of claim 14 , further comprising a reflective layer disposed on the at least one side surface of each of the first to third conversion layers.
23. The display device of claim 22 , wherein the reflective layer is further disposed on the partition walls and connects between two adjacent side surfaces from among the side surfaces of the first to third conversion layers.
24. The display device of claim 14 , wherein the light emitted from the light-emitting panel has a peak wavelength equal to or greater than about 400 nm and less than about 495 nm.
25. The display device of claim 24 , wherein
the first color filter selectively transmits light having a peak wavelength equal to or greater than about 580 nm and less than about 750 nm,
the second color filter selectively transmits light having a peak wavelength equal to or greater than about 495 nm and less than about 580 nm, and
the third color filter selectively transmits light having a peak wavelength equal to or greater than about 400 nm and less than about 495 nm.
26. The display device of claim 14 , wherein the light-emitting panel further comprises:
first to third light-emitting devices spaced apart from each other; and
a pixel-defining layer disposed between the first to third light-emitting devices,
wherein the pixel-defining layer overlaps the partition walls.