Display device with light-emitting diode in concave

1. A display device, comprising:

a substrate with a concave;

a light-emitting diode disposed in the concave;

a thin film transistor disposed on a surface of the substrate and electrically connected to the light-emitting diode; and

a protection layer covering the light-emitting diode, wherein the protection layer comprises a via hole exposing a part of the light-emitting diode.

2. The display device as claimed in claim 1 , wherein the thin film transistor and the light-emitting diode are disposed on the same side of the substrate.

3. The display device as claimed in claim 2 , further comprising an organic layer covering the substrate.

4. The display device as claimed in claim 3 , wherein the organic layer includes an opening corresponding to the concave of the substrate.

5. The display device as claimed in claim 1 , wherein the thin film transistor and the light-emitting diode are disposed on different sides of the substrate, and the thin film transistor and the light-emitting diode are electrically connected by a through hole penetrating the substrate.

6. The display device as claimed in claim 1 , further comprising a conductive layer covering the concave.

7. The display device as claimed in claim 6 , wherein the conductive layer comprises a reflective material.

8. The display device as claimed in claim 6 , wherein the conductive layer is electrically connected to a drain electrode of the thin film transistor.

9. The display device as claimed in claim 6 , wherein the conductive layer is electrically connected to the light-emitting diode.

10. The display device as claimed in claim 6 , wherein the conductive layer and a drain electrode of the thin film transistor are disposed on different sides of the substrate.

11. The display device as claimed in claim 6 , wherein a part of the conductive layer is electrically connected to a drain electrode of the thin film transistor, and another part of the conductive layer is electrically connected to a common electrode line.

12. The display device as claimed in claim 1 , wherein the thin film transistor comprises:

a gate electrode;

a semiconductor layer corresponding to the gate electrode;

a gate insulation layer disposed between the gate electrode and the semiconductor layer; and

a source electrode and a drain electrode respectively contacting the semiconductor layer,

wherein the source electrode is electrically connected to an external circuit, and the drain electrode is electrically connected to the light-emitting diode.

13. The display device as claimed in claim 12 , wherein the external circuit comprises a printed circuit board or an integrated circuit.

14. The display device as claimed in claim 12 , wherein the external circuit and the light-emitting diode are disposed on different sides of the substrate.

15. The display device as claimed in claim 1 , wherein the light-emitting diode comprises an inorganic light-emitting diode.

16. The display device as claimed in claim 15 , wherein the inorganic light-emitting diode includes a flip-chip type inorganic light-emitting diode or a vertical type inorganic light-emitting diode.

17. A display device, comprising:

a substrate with a concave;

a light-emitting diode disposed in the concave; and

a thin film transistor disposed on a surface of the substrate and electrically connected to the light-emitting diode,

wherein a height of the light-emitting diode and a depth of the concave have a difference of less than 100 nm.

18. A display device, comprising:

a substrate with a concave;

a light-emitting diode disposed in the concave;

a thin film transistor disposed on a surface of the substrate and electrically connected to the light-emitting diode, and

a conductive layer covering the concave,

wherein a vertical difference between a top surface of the light-emitting diode and a top surface of the conductive layer is less than 100 nm.