Display device including reverse tapered partition wall
A display device includes a substrate. A circuit layer is disposed on the substrate and including includes a pixel circuit and a sensor circuit. A pixel element layer is disposed on the circuit layer and includes a light emitting element electrically connected to the pixel circuit. A light receiving element is electrically connected to the sensor circuit. A pixel defining layer is disposed on the circuit layer. A partition wall is disposed on the pixel defining layer. The partition wall has a reverse taper shape.
1 . A display device, comprising:
a substrate;
a circuit layer disposed on the substrate and including a pixel circuit and a sensor circuit;
a pixel element layer disposed on the circuit layer and including a light emitting element electrically connected to the pixel circuit, a light receiving element electrically connected to the sensor circuit, and a pixel defining layer disposed on the circuit layer; and
a partition wall disposed on the pixel defining layer,
wherein the partition wall has a reverse taper shape.
2 . The display device according to claim 1 , wherein an angle formed between a side surface and a lower surface of the partition wall is greater than 90°.
3 . The display device according to claim 1 , wherein the light emitting element includes an anode electrode, a light emitting layer disposed on the anode electrode, and a cathode electrode disposed on the light emitting layer, and
the light receiving element includes a first sensor electrode, a light receiving layer disposed on the first sensor electrode, and a second sensor electrode disposed on the light receiving layer.
4 . The display device according to claim 3 , wherein the cathode electrode and the second sensor electrode include a same material.
5 . The display device according to claim 4 , wherein the cathode electrode and the second sensor electrode are spaced apart from each other with respect to the partition wall disposed between the cathode electrode and the second sensor electrode.
6 . The display device according to claim 3 , further comprising:
a dummy layer disposed on the partition wall.
7 . The display device according to claim 6 , wherein the cathode electrode, the second sensor electrode, and the dummy layer include a same material and are spaced apart from each other.
8 . The display device according to claim 3 , wherein the anode electrode and the first sensor electrode include a same material.
9 . The display device according to claim 3 , wherein the pixel defining layer is disposed on the anode electrode of the light emitting element and the first sensor electrode of the light receiving element, and the pixel defining layer includes a first opening exposing a portion of the anode electrode and a second opening exposing a portion of the first sensor electrode.
10 . The display device according to claim 9 , wherein the first opening corresponds to a light emitting area from which light of the light emitting element is emitted, and the second opening corresponds to a light receiving area through which the light receiving element receives the light.
11 . The display device according to claim 3 , further comprising:
a thin film encapsulation layer disposed on the cathode electrode of the light emitting element and the second sensor electrode of the light receiving element and covering the light emitting element and the light receiving element.
12 . The display device according to claim 11 , further comprising:
a touch sensor disposed on the thin film encapsulation layer.
13 . A display device, comprising:
a substrate; and
a pixel element layer disposed on the substrate and including sub-pixels and light sensing pixels,
wherein each of the sub-pixels includes a light emitting element and a light emitting area from which light is emitted,
wherein each of the light sensing pixels includes a light receiving element outputting a sensing signal corresponding to the light emitted from the light emitting element and a light receiving area receiving the light emitted from the light emitting element,
wherein the light emitting area and the light receiving area are spaced apart from each other on the substrate, and
wherein a partition wall is disposed between the light emitting area and the light receiving area.
14 . The display device according to claim 13 , wherein the partition wall at least partially surrounds the light receiving area.
15 . The display device according to claim 14 , wherein the partition wall includes an opening area that is at least partially opened.
16 . The display device according to claim 15 , wherein each of the sub-pixels includes a light emitting element,
wherein each of the light sensing pixels includes a light receiving element,
wherein the light emitting element includes an anode electrode, a light emitting layer disposed on the anode electrode, and a cathode electrode disposed on the light emitting layer, and
wherein the light receiving element includes a first sensor electrode, a light receiving layer disposed on the first sensor electrode, and a second sensor electrode disposed on the light receiving layer.
17 . The display device according to claim 16 , wherein the cathode electrode and the second sensor electrode include a same material.
18 . The display device according to claim 17 , wherein the cathode electrode and the second sensor electrode are spaced apart from each other with respect to the partition wall disposed between the cathode electrode and the second sensor electrode.
19 . The display device according to claim 17 , wherein the cathode electrode and the second sensor electrode are integrally formed and are connected to each other through the opening area of the partition wall.
20 . The display device according to claim 17 , further comprising:
a dummy layer disposed on the partition wall,
wherein the dummy layer includes a same material as the cathode electrode and the second sensor electrode.