Organic light-emitting display apparatus having an embossed structure

1. An organic light-emitting display apparatus comprising:

a thin-film transistor (TFT) comprising an active layer, a gate electrode, a source electrode and a drain electrode;

an organic light-emitting device that comprises a pixel electrode connected to the TFT, an intermediate layer which comprises a light-emitting layer, and an opposite electrode; and

an opposite electrode contact unit in which the opposite electrode is electrically connected to a power wiring,

wherein, a surface of the power wiring that contacts the opposite electrode is formed to have an embossed structure.

2. The organic light-emitting display apparatus of claim 1 , wherein the power wiring comprises at least one or more wiring layers, and

the at least one or more wiring layers comprise a wiring layer that comprises the same material and is on the same layer as the source and drain electrodes of the TFT.

3. The organic light-emitting display apparatus of claim 1 , wherein the power wiring comprises at least one or more wiring layers, and

the at least one or more wiring layers comprise a wiring layer that comprises the same material and is on a same layer as the gate electrode of the TFT.

4. The organic light-emitting display apparatus of claim 1 , wherein one slope of the embossed structure forms a specific angle with regard to a deposition source that deposits an intermediate layer of the organic light-emitting device.

5. The organic light-emitting display apparatus of claim 4 , wherein the specific angle is determined so that a deposition material, which is generated from the deposition source, reaches the one slope of the embossed structure in a vertical direction.

6. The organic light-emitting display apparatus of claim 4 , wherein the one slope of the embossed structure is formed to be vertical to the substrate of the organic light-emitting display apparatus.

7. The organic light-emitting display apparatus of claim 1 , wherein the embossed structure is formed in an engraving or embossing structure with respect to the opposite electrode.

8. The organic light-emitting display apparatus of claim 1 , wherein the gate electrode comprises an upper gate electrode and a lower gate electrode, and

the lower gate electrode is formed on a same layer as the pixel electrode of the organic light-emitting device.

9. The organic light-emitting display apparatus of claim 8 , wherein the power wiring comprises first, second and third wiring layers which are formed on the first layer, second layer and the third layer in the order stated,

the first, second and third wiring layers are sequentially formed in a direction toward the opposite electrode,

the first wiring layer comprises the same material and is on a same layer as the lower gate electrode,

the second wiring layer comprises the same material and is on the same layer as the lower gate electrode, and

the third wiring layer comprises the same material and is on the same layer as the source electrode and the drain electrode.

10. The organic light-emitting display apparatus of claim 9 , wherein the pixel electrode, the lower gate electrode, or the first wiring layer are formed to comprise one or more transparent metal oxides selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium oxide (In 2 O 3 ).

11. The organic light-emitting display apparatus of claim 9 , wherein the upper gate electrode or the third wiring layer comprises one or more materials selected from the group consisting of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chrome (Cr), lithium (Li), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), molybdenum tungsten (MoW), and copper (Cu).

12. The organic light-emitting display apparatus of claim 1 , wherein the opposite electrode contact unit is formed in a non-display area.

13. The organic light-emitting display apparatus of claim 1 , further comprising an interlayer insulating layer and a pixel-defining layer formed outside a portion of the power wiring in the opposite electrode contact unit.

14. The organic light-emitting display apparatus of claim 13 , wherein the power wiring is electrically connected to the opposite electrode via a hole that is formed on the interlayer insulating layer and the pixel-defining layer.

15. The organic light-emitting display apparatus of claim 13 , wherein the interlayer insulating layer comprises an inorganic insulating material, and the pixel-defining layer comprises an organic insulating material.

16. An opposite electrode contact unit, comprising:

a power wiring that comprises at least one or more wiring layers; and

an opposite electrode that is electrically connected to the power wiring,

wherein the opposite electrode contact unit is formed in a non-display area of an organic light-emitting display apparatus, and

the power wiring has an embossed structure on one surface thereof in a direction toward the opposite electrode.