Organic light-emitting display apparatus

1. An organic light-emitting display apparatus comprising:

a substrate;

a display unit on the substrate and comprising a display area and a non-display area outside of the display area; and

a thin-film encapsulation layer that seals the display unit,

wherein the non-display area comprises a dam region located outside of the display area and a plurality of protrusions on at least a part of the display unit outside of the dam region.

2. The organic light-emitting display apparatus of claim 1 , wherein the plurality of protrusions form a uniform pattern.

3. The organic light-emitting display apparatus of claim 1 , wherein the plurality of protrusions are arranged in a plurality of rows and a plurality of columns.

4. The organic light-emitting display apparatus of claim 1 , wherein the plurality of protrusions surround the dam region.

5. The organic light-emitting display apparatus of claim 1 , wherein a power supply wire is located in the non-display area, and the dam region overlaps and contacts at least an outer edge of the power supply wire.

6. The organic light-emitting display apparatus of claim 1 , wherein the thin-film encapsulation layer comprises at least one inorganic film and at least one organic film,

wherein the at least one organic film is located in the dam region.

7. The organic light-emitting display apparatus of claim 1 , wherein the thin-film encapsulation layer comprises a plurality of inorganic films and a plurality of organic films respectively located between the plurality of inorganic films, wherein the plurality of inorganic films cover the plurality of protrusions.

8. The organic light-emitting display apparatus of claim 7 , wherein the plurality of inorganic films contact each other outside of the plurality of protrusions.

9. The organic light-emitting display apparatus of claim 1 , wherein the display unit comprises: a thin-film transistor; an organic light-emitting device electrically coupled to the thin-film transistor; a passivation film between the thin-film transistor and the organic light-emitting device; and a pixel-defining film defining a pixel region of the organic light-emitting device,

wherein the dam region and the plurality of protrusions are formed of a same material as at least one selected from the passivation film and the pixel-defining film.

10. The organic light-emitting display apparatus of claim 9 , wherein the dam region comprises: a first layer formed of a same material as the passivation film; and a second layer on the first layer and formed of a same material as the pixel-defining film, and

the plurality of protrusions are formed of the same material as the pixel-defining film.

11. The organic light-emitting display apparatus of claim 9 , wherein the thin-film transistor comprises: an active layer; a gate electrode; a source electrode; and a drain electrode,

wherein a gate insulating layer is located between the active layer and the gate electrode, and an interlayer insulating film is located between the gate electrode and the source and drain electrodes, and

the gate insulating layer and the interlayer insulating film extend to the non-display area.

12. The organic light-emitting display apparatus of claim 11 , wherein the plurality of protrusions are located on the interlayer insulating film.

13. The organic light-emitting display apparatus of claim 11 , wherein the thin-film encapsulation layer comprises at least one inorganic film, wherein the at least one inorganic film contacts the interlayer insulating film outside of the plurality of protrusions.

14. The organic light-emitting display apparatus of claim 13 , wherein the at least one inorganic film contacts a top surface of the substrate through an edge portion of the interlayer insulating film.