Display apparatus having a connecting electrode which crosses a bending area
A display apparatus having a connection electrode which crosses a bending area may be provided. The connection electrode may be disposed on a device substrate including a bending area between a display area and a pad area. The connection electrode may connect the display area and the pad area across the bending area. The connection electrode may have a stacked structure of the lower connecting electrode and the upper connecting electrode. A light-emitting device, an encapsulating element and a touch electrode may be sequentially stacked on the display area of the device substrate. The upper connecting electrode may include the same material as the touch electrode. Thus, in the display apparatus, the disconnection of the connection electrode due to bending stress and external impact may be reduced.
1 . A display apparatus comprising:
a device substrate including a display area and a bending area;
a first thin film transistor including a first semiconductor film, a first gate electrode, a first source electrode, and a first drain electrode in the display area;
a second thin film transistor including a second semiconductor film, a second gate electrode, a second source electrode, and a second drain electrode in the display area, the second semiconductor film on a layer different from the first semiconductor film in the display area;
a light-emitting device on the display area of the device substrate;
a passivation layer positioned between the second gate electrode and the second source electrode and positioned between the second gate electrode and the second drain electrode in the display area;
a first over-coat layer positioned on the passivation layer and positioned between the second source electrode and the light-emitting device and between the second drain electrode and the light-emitting device in the display area;
a second over-coat layer between the first over-coat layer and the light-emitting device in the display area;
an intermediate contact electrode positioned between the first over-coat layer and the second over-coat layer in the display area, and the light-emitting device and the first thin film transistor being electrically connected to each other through the intermediate contact electrode;
a lower connecting electrode on the bending area on the device substrate, the lower connecting electrode crossing the bending area; and
a crack preventing layer on the lower connecting electrode in the bending area; and
wherein the crack preventing layer includes a same material as the first over-coat layer,
the first over-coat layer is further disposed between the crack preventing layer and the device substrate in the bending area,
the lower connecting electrode is between the first over-coat layer and the crack preventing layer.
2 . The display apparatus according to claim 1 , further comprising:
a lower insulating layer between the device substrate and the second semiconductor film;
wherein the first semiconductor film and the first gate electrode are between the device substrate and the lower insulating layer, and the second semiconductor film and the second gate electrode are between the lower insulating layer and the first over-coat layer.
3 . The display apparatus according to claim 1 , wherein the first semiconductor film includes a low temperature poly-Si (LTPS) and the second semiconductor film includes a metal oxide.
4 . The display apparatus according to claim 1 , wherein the display area of the device substrate includes a hole peripheral area comprising a substrate hole that penetrates the device substrate.
5 . The display apparatus according to claim 1 ,
wherein the intermediate contact electrode is electrically connected to the first drain electrode of the first thin film transistor.
6 . The display apparatus according to claim 5 , wherein the lower connecting electrode includes a same material as the intermediate contact electrode.
7 . The display apparatus according to claim 1 , further comprising:
an encapsulating element on the light-emitting device; and
touch electrodes on the encapsulating element in the display area;
wherein the touch electrodes are electrically connected to the lower connecting electrode through one of link lines.
8 . The display apparatus according to claim 7 , wherein the crack preventing layer includes a connection contact hole exposing a portion of the lower connecting electrode, and wherein the one of link lines is electrically connected to the lower connecting electrode through the connection contact hole.
9 . The display apparatus according to claim 7 , further comprising:
a cover insulating layer is on the touch electrodes in the display area;
wherein the cover insulating layer is on the crack preventing layer in the bending area.