Display device including a reflection preventing layer
A display device includes a substrate, a first electrode, an organic light-emitting layer, a second electrode, a phase matching layer, and at least one light-absorbing layer. The substrate includes a plurality of pixel regions and a non-pixel region. The non-pixel region is arranged between adjacent pixel regions. The first electrode is arranged in each pixel region. The organic light-emitting layer is arranged on the first electrode. The second electrode is arranged on the organic light-emitting layer. The phase matching layer is arranged on the second electrode. The at least one light-absorbing layer is arranged on the phase matching layer. A thickness of the second electrode in the non-pixel region is different than a thickness of the second electrode in the pixel regions.
1. A display device, comprising:
a substrate including a plurality of pixel regions and a non-pixel region, wherein the non-pixel region is arranged between adjacent pixel regions;
a first electrode arranged in each pixel region;
an organic light-emitting layer arranged on the first electrode;
a second electrode arranged on the organic light-emitting layer;
a phase matching layer arranged on the second electrode; and
at least one light-absorbing layer arranged on the phase matching layer,
wherein a thickness of the second electrode in the non-pixel region is different than a thickness of the second electrode in the pixel regions, and
wherein the second electrode is a semi-transmissive reflecting layer in the pixel regions and a reflecting layer in the non-pixel region.
2. The display device of claim 1 , wherein the thickness of the second electrode in the non-pixel region is larger than the thickness of the second electrode in the pixel regions.
3. The display device of claim 2 , wherein the thickness of the second electrode in the non-pixel region is larger than the thickness of the second electrode in the pixel regions by no less than 50 Å.
4. The display device of claim 2 , wherein the thickness of the second electrode in the non-pixel region is about 200 Å to about 500 Å.
5. The display device of claim 2 , wherein the thickness of the second electrode in the non-pixel region is about 4/3 to about 10/3 of the thickness of the second electrode in the pixel regions.
6. The display device of claim 1 , wherein the light-absorbing layer in a visible ray region comprises a material in which multiplication of a refractive index and an extinction coefficient of the material is no less than 0.5.
7. The display device of claim 6 , wherein the light-absorbing layer in the visible ray region comprises a material in which multiplication of a refractive index and an extinction coefficient of the material is about 2 to about 4.
8. The display device of claim 6 , wherein the light-absorbing layer includes Cr, Mo, Ti, Co, Ni, Ti, Al, W, Mn, CrNx, TiNx, TiAlNx,MoOx, CuOx, or a combination thereof.
9. The display device of claim 1 , wherein the phase matching layer in a visible ray region comprises a material with a refractive index of no less than 1 and an extinction coefficient of no more than 5.
10. The display device of claim 9 , wherein the phase matching layer comprises SiNx, SiOx, SiCN, LiF, MgF 2 , CaF 2 , or any combination thereof.
11. The display device of claim 1 , further comprising a thin film encapsulation layer arranged on the light-absorbing layer.
12. The display device of claim 11 , further comprising a light-blocking pattern arranged on the thin film encapsulation layer in the non-pixel region.
13. The display device of claim 12 , further comprising a touch screen arranged between the thin film encapsulation layer and the light-blocking pattern.
14. A display device, comprising:
a substrate including a plurality of pixel regions and a non-pixel region, wherein the non-pixel region is disposed between adjacent pixel regions;
a first electrode disposed in each pixel region;
an organic light-emitting layer disposed on the first electrode;
a second electrode disposed on the organic light-emitting layer; and
a reflection preventing layer disposed on the second electrode,
wherein a thickness of the second electrode in the non-pixel region is different than a thickness of the second electrode in the pixel regions, and
wherein the second electrode is a reflecting layer in the non-pixel region.
15. The display device of claim 14 , wherein the reflection preventing layer includes at least one phase matching layer disposed on the second electrode and at least one light-absorbing layer disposed on the at least one phase matching layer.
16. The display device of claim 15 , wherein the light-absorbing layer in a visible ray region comprises a material in which multiplication of a refractive index and an extinction coefficient of the material is no less than 0.5.
17. The display device of claim 14 , wherein the second electrode is a semi-transmissive reflecting layer in the pixel regions.
18. The display device of claim 14 , further comprising an encapsulation member disposed on the reflection preventing layer.
19. A display device, comprising:
a substrate including a plurality of pixel regions and a non-pixel region, wherein the non-pixel region is arranged between adjacent pixel regions;
a first electrode arranged in each pixel region;
an organic light-emitting layer arranged on the first electrode;
a second electrode arranged on the organic light-emitting layer;
a phase matching layer arranged on the second electrode; and
at least one light-absorbing layer arranged on the phase matching layer,
wherein a thickness of the second electrode in the non-pixel region is different than a thickness of the second electrode in the pixel regions, and
wherein the second electrode is a reflecting layer in the non-pixel region.
20. The display device of claim 19 , wherein the thickness of the second electrode in the non-pixel region is larger than the thickness of the second electrode in the pixel regions.