Display device
View Patent ↗The organic electroluminescence display device of an embodiment of the present invention includes a substrate, a plurality of pixels formed on the substrate, and a sealing film that covers the plurality of pixels. The sealing film includes a first barrier layer, a base layer covering the top surface of the first barrier layer, an inter layer locally formed on the top surface of the base layer, and a second barrier layer covering the top surface of the base layer and the top surface of the inter layer. The inter layer is formed so as to cover a step or the top surface of the base layer.
1. A display device comprising:
a first substrate;
a plurality of organic light emitting elements on the first substrate; and a sealing film covering the organic light emitting elements, the sealing film including a first barrier layer, a base layer including silicon oxide or amorphous silicon on the first barrier layer, an organic layer on the base layer, and a second barrier layer on the base layer and the organic layer, a first thickness of the first barrier layer being thicker than a second thickness of the base layer,
wherein the first barrier layer includes silicon nitride or silicon oxynitride, and the second barrier layer includes silicon nitride or silicon oxynitride,
the base layer and the second barrier layer are in contact with each other,
the base layer and the first barrier layer are in contact with each other; and further comprising:
a filler on the sealing film; and
a second substrate on the filler.
2. The display device according to claim 1 , wherein the sealing film includes:
a first region where the first barrier layer, the base layer, and the second barrier layer are laminated and the second barrier layer is in physical contact with the base layer, and
a second region where the first barrier layer, the base layer, the organic layer, and the second barrier layer are laminated.
3. The display device according to claim 1 , further comprising a plurality of second regions including the second region,
wherein the first region is arranged between two of the second regions in a cross-sectional view.
4. The display device according to claim 1 , further comprising:
an electrode between the first substrate and the sealing film; and
an insulation film, which is arranged between the electrode and the sealing film, exposes a part of the electrode and covers an edge of the electrode.
5. The display device according to claim 4 , wherein the sealing film covers both the insulation film and the part of the electrode.
6. The display device according to claim 4 , wherein a first contact angle of the organic layer with respect to the base layer is smaller than a second contact angle of the insulation film with respect to the electrode.
7. A display device comprising:
a first substrate;
an underling layer which is arranged on the first substrate, includes a plurality of organic light emitting elements, and has a first horizontal surface, a second horizontal surface, and an inclined surface between the first horizontal surface and the second horizontal surface; and
a sealing film including a first inorganic insulation layer, an organic layer on the first inorganic insulation layer, and a second inorganic insulation layer on the organic layer and the first inorganic insulation layer, wherein
a first distance between the first substrate and the first horizontal surface is longer than a second distance between the first substrate and the second horizontal surface,
the first inorganic insulation layer has a corner portion just above a boundary between the second horizontal surface and the raised inclined surface in a cross-sectional view, the organic layer is arranged just above the corner portion in the cross-sectional view,
the organic layer has an upper surface having a first end portion and a second end portion,
the first inorganic insulation-layer, the second inorganic insulation layer, and the organic insulation layer are in contact with each other at the first end portion,
the first inorganic insulation layer, the second inorganic insulation layer, and the organic layer are in contact with each other at the second end portion, and
the upper surface having a curved shape which dents toward the corner portion in the cross-sectional view; and further comprising:
a filler on the sealing film; and
a second substrate on the filler.
8. The display device according to claim 7 , wherein
the first inorganic insulation layer has a first thickness,
the sealing film includes a base layer between the first inorganic insulation layer and the organic layer,
the base layer includes silicon oxide or amorphous silicon on the first inorganic insulation layer and has a second thickness being smaller than the first thickness,
the first inorganic insulation layer includes silicon nitride or silicon oxynitride, and
the second inorganic insulation layer includes silicon nitride or silicon oxynitride.
9. The display device according to claim 8 , wherein the sealing film includes:
a first region where the first inorganic insulation layer, the base layer, and the second inorganic insulation layer are laminated without the organic layer; and
a second region where the first inorganic insulation layer, the base layer, the organic layer, and the second inorganic insulation layer are laminated.
10. The display device according to claim 9 , further comprising a plurality of second regions including the second region,
wherein the first region is arranged between two of the second regions in the cross-sectional view, and
wherein the first inorganic insulation layer includes a first barrier layer, and the second inorganic insulation layer includes a second barrier layer.
11. A display device comprising:
a first substrate;
an underling layer which is arranged on the first substrate, includes a plurality of pixels, and has a first horizontal surface, a second horizontal surface, and a raised an inclined surface between the first horizontal surface and the second horizontal surface; and
a sealing film covering the underling layer, the sealing film including a first barrier layer, a base layer including silicon oxide or amorphous silicon on the first barrier layer, an organic layer on the base layer, and a second barrier layer on the base layer and the organic layer, a first thickness of the first barrier layer being thicker than a second thickness of the base layer, wherein the first barrier layer includes a first compound inorganic material of silicon and nitride, and the second barrier layer includes a second compound inorganic material of silicon and nitride, wherein
each of the plurality of pixels includes an organic light emitting element and a pixel circuit connected to the organic emitting element,
a first distance between the first substrate and the first horizontal surface is longer than a second distance between the first substrate and the second horizontal surface,
the organic layer is arranged just above a boundary between the second horizontal surface and the raised horizontal surface in a cross-sectional view,
the base layer and the second barrier layer are in contact with each other,
the base layer and the first barrier layer are in contact with each other,
the organic layer has an upper surface having a first end portion and a second end portion,
the base layer, the second barrier layer, and the organic layer are in contact with each other at the first end portion,
the base layer, the second barrier layer, and the organic layer are in contact with each other at the second end portion, and
the upper surface having a curved shape which dents toward the boundary in the cross-sectional view; and further comprising:
a filler on the sealing film; and
a second substrate on the filler.
12. The display device according to claim 11 , wherein the sealing film includes:
a first region where the first barrier layer, the base layer, and the second barrier layer are laminated and the second barrier layer is in physical contact with the base layer; and
a second region where the first barrier layer, the base layer, the organic layer, and the second barrier layer are laminated.
13. The display device according to claim 12 , further comprising a plurality of second regions including the second region, and
wherein the first region is arranged between two of the second regions in a cross-sectional view.
14. The display device according to claim 11 , further comprising:
an electrode between the first substrate and the sealing film; and
an insulation film which is arranged between the electrode and the sealing film, exposes a part of the electrode, and covers an edge of the electrode.
15. The display device according to claim 14 , wherein the sealing film covers both the insulation film and the part of the electrode.
16. The display device according to claim 14 , wherein a first contact angle of the organic layer with respect to the base layer is smaller than a second contact angle of the insulation film with respect to the electrode.