Display device with pixel-integrated closed ring outer electrode
A display device includes a first electrode, an outer electrode surrounding the first electrode, a bank overlapping the outer electrode in a plan view, the bank including an opening that exposes the first electrode, a light emitting element disposed on the first electrode and in the opening of the bank, and a second electrode disposed on the light emitting element. The outer electrode may be electrically disconnected from the first electrode upon a bad contact between a light emitting member and the outer electrode. As a result, defective pixels can be repaired.
1 . A display device comprising:
a first electrode;
an outer electrode disposed within a single pixel and forming a closed ring that completely surrounds the first electrode in a plan view and is spaced apart from the first electrode by a continuous gap;
a bank overlapping the outer electrode in a plan view, the bank including an opening that exposes the first electrode;
a light emitting element disposed on the first electrode and in the opening of the bank; and
a second electrode disposed on the light emitting element.
2 . The display device of claim 1 , wherein the outer electrode is electrically connected to the first electrode.
3 . The display device of claim 1 , wherein the first electrode and the outer electrode are disposed on a same layer.
4 . The display device of claim 1 , wherein the light emitting element comprises:
a first conductive semiconductor layer;
an active layer disposed on the first conductive semiconductor layer; and
a second conductive semiconductor layer disposed on the active layer,
wherein the first conductive semiconductor layer, the active layer, and the second conductive semiconductor layer are sequentially stacked to form a discrete micro-light emitting diode chip.
5 . The display device of claim 4 , further comprising:
a connection part disposed between the outer electrode and the first electrode.
6 . The display device of claim 5 , wherein the first electrode, the outer electrode, and the connection part are disposed on a same layer.
7 . The display device of claim 5 , wherein
an end of the outer electrode is electrically connected to a side of the connection part, and
another end of the outer electrode is electrically connected to another side of the connection part.
8 . The display device of claim 5 , wherein the outer electrode is electrically disconnected from the connection part.
9 . The display device of claim 1 , further comprising:
a dummy light emitting element disposed on the outer electrode.
10 . The display device of claim 9 , wherein the dummy light emitting element partially overlaps the bank in a plan view.
11 . A display device comprising:
a first pixel; and
a second pixel, wherein each of the first pixel and the second pixel includes:
a first electrode;
an outer electrode disposed within a single pixel and forming a closed ring that completely surrounds the first electrode in a plan view and is spaced apart from the first electrode by a continuous gap;
a bank overlapping the outer electrode in a plan view, the bank including an opening that exposes the first electrode;
a light emitting element disposed on the first electrode and in the opening of the bank; and
a second electrode disposed on the light emitting element.
12 . The display device of claim 11 , wherein the outer electrode of the first pixel is electrically connected to the first electrode of the first pixel.
13 . The display device of claim 11 , wherein the outer electrode of the second pixel is separated from the first electrode of the second pixel.
14 . The display device of claim 13 , wherein the second pixel further includes a dummy light emitting element disposed on the outer electrode of the second pixel.
15 . The display device of claim 14 , wherein the dummy light emitting element partially overlaps the bank in a plan view.
16 . The display device of claim 11 , further comprising:
a connection part disposed between the outer electrode and the first electrode in each of the first and second pixels.
17 . The display device of claim 16 , wherein
an end of the outer electrode of the first pixel is electrically connected to a side of the connection part, and
another end of the outer electrode of the first pixel is electrically connected to another side of the connection part.
18 . The display device of claim 16 , wherein the outer electrode of the second pixel is separated from the connection part of the second pixel.