Light-emitting display device
The present disclosure provides a light-emitting display device including a first substrate, sub-pixels and contact holes. Each sub-pixel is positioned on the first substrate and has an emission area from which light is emitted. The contact is positioned in a hole in the emission area and serves to electrically connect a transistor of the sub-pixel to a light-emitting diode emitting light and an emission layer on the contact is to emit light in the same color as the light emitted from the emission area.
1. A light-emitting display device, comprising:
a first substrate;
sub-pixels positioned on the first substrate and having emission areas from which light is emitted; and
a contact positioned in each emission area and serving to electrically connect a transistor of each sub-pixel to a light-emitting diode that emits light,
wherein an emission layer on the contact emits light of the same color as light emitted from the emission area,
wherein each of the sub-pixels includes:
a transistor on the first substrate;
a passivation layer positioned on the transistor;
a planarization layer positioned on the passivation layer, and exposing an electrode of the transistor and having the contact positioned in the emission area,
a hole-filling layer filling the inside of the contact hole;
a second lower electrode positioned on the first lower electrode and the hole-filling layer;
the emission layer positioned on the second lower electrode; and
an upper electrode positioned on the emission layer.
2. The light-emitting display device according to claim 1 , wherein the contact includes a hole-filling layer filling the recessed inside thereof.
3. The light-emitting display device according to claim 1 , further comprising:
a lower electrode positioned on the contact;
the emission layer positioned on the lower electrode; and
an upper electrode positioned on the emission layer.
4. The light-emitting display device according to claim 1 , wherein the planarization layer includes an isolation hole surrounding the emission area and recessed downward.
5. The light-emitting display device according to claim 4 , wherein the first and second lower electrodes are isolated per sub-pixel by the isolation hole.
6. The light-emitting display device according to claim 4 , wherein the emission layer is formed having the same thickness in the entire area of the sub-pixels and is isolated in the isolation hole.
7. The light-emitting display device according to claim 4 , wherein the emission layer is formed having the same thickness in the entire area of the sub-pixels and includes a relatively thin portion and an isolated portion in the isolation hole.
8. The light-emitting display device according to claim 4 , wherein the emission layer is formed having the same thickness in the entire area of the sub-pixels and is relatively thin only in the isolation hole.
9. The light-emitting display device according to claim 4 , further comprising a bank layer covering part of the lower electrode around the isolation hole.
10. The light-emitting display device according to claim 9 , wherein the bank layer covers part of the lower electrode positioned inside the isolation hole and a surrounding region of the isolation hole.
11. The light-emitting display device according to claim 9 , wherein the bank layer has rounded or angulated edges at the boundary of the isolation hole.
12. The light-emitting display device according to claim 1 , wherein the hole-filling layer has a thickness similar or identical to the first lower electrode.
13. The light-emitting display device according to claim 1 , wherein the hole-filling layer is recessed downward from the first lower electrode.
14. The light-emitting display device according to claim 1 , wherein the hole-filling layer protrude upward from the first lower electrode.