Display device
A display device according to an exemplary aspect of the present disclosure includes a substrate divided into an active area and a non-active area including a gate-in-panel (GIP) area, a planarization layer disposed over the substrate and extending to the non-active area, a bank disposed over the planarization layer and extending to the non-active area, an encapsulation layer disposed over the bank and a hydrogen absorption layer disposed between the bank and the planarization layer to cover the GIP area, so that it is possible to improve characteristics and reliability of an oxide thin film transistor by blocking introduction of hydrogen into the oxide thin film transistor of a GIP circuit.
1 . A display device, comprising:
a substrate divided into an active area and a non-active area including a gate-in-panel (GIP) area;
a planarization layer disposed over the substrate and extending to the non-active area;
a bank disposed over the planarization layer and extending to the non-active area;
an encapsulation layer disposed over the bank; and
a hydrogen absorption layer disposed between the bank and the planarization layer to cover the GIP area.
2 . The display device of claim 1 , wherein the GIP area includes an oxide thin film transistor.
3 . The display device of claim 1 , wherein the non-active area further includes a dummy pixel area between the GIP area and the active area.
4 . The display device of claim 3 , wherein one end of the hydrogen absorption layer is spaced apart from the dummy pixel area by a predetermined distance.
5 . The display device of claim 4 , wherein one end of the hydrogen absorption layer passes through the planarization layer and surrounds an inside of the planarization layer.
6 . The display device of any one of claim 5 , wherein another end of the hydrogen absorption layer extends to the non-active area to cover an outside of the planarization layer.
7 . The display device of claim 6 , further comprising a dam disposed over the substrate in the non-active area.
8 . The display device of claim 7 , wherein the dam has a shape of a frame surrounding the active area.
9 . The display device of claim 7 , wherein another end of the hydrogen adsorption layer is spaced apart from the dam by a predetermined distance.
10 . The display device of claim 3 , further comprising a light emitting element disposed over the planarization layer and including an anode, an organic layer, and a cathode.
11 . The display device of claim 10 , wherein the dummy pixel area is an area where dummy pixels are disposed, and is located to surround a periphery of the active area.
12 . The display device of claim 11 , wherein the dummy pixels include a thin film transistor having a structure corresponding to a thin film transistor disposed in the active area.
13 . The display device of claim 11 , wherein the anode and the cathode of the light emitting element excluding the organic layer are disposed to extend in the dummy pixel area.
14 . The display device of claim 13 , wherein, in the dummy pixel area, the bank is disposed without an open area on the anode of the dummy pixel area, and the cathode of the dummy pixel area is disposed on the bank.
15 . The display device of claim 13 , wherein one end of the hydrogen absorption layer is disposed on a same layer as the anode of the dummy pixel area and spaced apart from the anode of the dummy pixel area by a predetermined distance.
16 . The display device of claim 1 , wherein the hydrogen adsorption layer includes one of titanium (Ti), scandium (Sc), vanadium (V), lead (Pd), niobium (Nb), zirconium (Zr), yttrium (Y), tantalum (Ta), cerium (Ce), lanthanum (La), samarium (Sm), and uranium (U).
17 . The display device of claim 1 , wherein the hydrogen adsorption layer includes a titanium (Ti) alloy or titanium dioxide (TiO 2 ).
18 . The display device of claim 1 , wherein the hydrogen absorption layer has a shape of a frame surrounding the active area.
19 . The display device of claim 1 , wherein the planarization layer is composed of multiple layers of a first planarization layer and a second planarization layer, and
wherein the display device further includes an additional hydrogen absorption layer disposed under the hydrogen absorption layer between the first planarization layer and the second planarization layer.
20 . The display device of claim 1 , wherein the planarization layer is composed of a first planarization layer over a passivation layer and a second planarization layer over the first planarization layer, and
wherein the display device further includes an additional hydrogen absorption layer disposed under the hydrogen absorption layer and between the passivation layer and the first planarization layer.