Display device
A display device is provided. The display device includes a substrate, a driving circuit disposed on the substrate, and a light-emitting unit disposed on the driving circuit and electrically connected to the driving circuit. The light-emitting unit includes a first semiconductor layer, a quantum well layer disposed on the first semiconductor layer and a second semiconductor layer disposed on the quantum well layer. The second semiconductor layer includes a first top surface. The display device also includes a first protective layer disposed on the driving circuit and adjacent to the light-emitting unit. The first protective layer includes a second top surface and a plurality of conductive elements formed therein. The elevation of the first top surface is higher than the elevation of the second top surface.
1. A display device, comprising:
a substrate;
a driving circuit disposed on the substrate;
a light-emitting unit disposed on the driving circuit and electrically connected to the driving circuit, wherein the light-emitting unit comprises an upper surface, and the upper surface is an uppermost surface of the light-emitting unit; and
a first protective layer disposed on the driving circuit, wherein the first protective layer comprises a top surface,
wherein the light-emitting unit in a cross section along a normal direction of the substrate comprises a rounded corner adjacent to the first protective layer and an elevation of the upper surface is higher than an elevation of the top surface of the first protective layer.
2. The display device as claimed in claim 1 , wherein the light-emitting unit comprises a first semiconductor layer and a second semiconductor layer disposed on the first semiconductor layer, the second semiconductor layer comprises a top surface, and an elevation of the top surface of second semiconductor layer is higher than the elevation of the top surface of the first protective layer.
3. The display device as claimed in claim 2 , further comprising a quantum well layer disposed between the first semiconductor layer and the second semiconductor layer, wherein the top surface of the first protective layer is between the top surface of the second semiconductor layer and a top surface of the quantum well layer.
4. The display device as claimed in claim 1 , wherein the light-emitting unit comprises a first semiconductor layer and a second semiconductor layer which is disposed on the first semiconductor layer and has a top surface, and the uppermost surface of the light-emitting unit is the top surface of the second semiconductor layer.
5. The display device as claimed in claim 1 , wherein the elevation of the top surface of the first protective layer is a maximum distance from the substrate to the top surface of the first protective layer along the normal direction of the substrate.
6. The display device as claimed in claim 1 , wherein the elevation of the top surface of the first protective layer is a maximum distance from a bottom surface of the substrate to the top surface of the first protective layer along the normal direction of the substrate.
7. The display device as claimed in claim 1 , further comprising an insulating layer disposed between the driving circuit and the light-emitting unit.
8. The display device as claimed in claim 7 , wherein the insulating layer comprises a bank portion that surrounds the light-emitting unit.
9. The display device as claimed in claim 8 , wherein an elevation of a top surface of the bank portion is lower than the elevation of the upper surface of the light-emitting unit.
10. The display device as claimed in claim 8 , wherein an elevation of a top surface of the bank portion is higher than the elevation of the upper surface of the light-emitting unit.
11. The display device as claimed in claim 1 , wherein the upper surface of the light-emitting unit in the cross section along the normal direction of the substrate comprises the rounded corner adjacent to the first protective layer.
12. The display device as claimed in claim 1 , wherein a thickness of the first protective layer that is closer to the light-emitting unit is greater than a thickness of the first protective layer that is farther to the light-emitting unit.
13. The display device as claimed in claim 1 , wherein a thickness of the first protective layer that is closer to the light-emitting unit is smaller than a thickness of the first protective layer that is farther to the light-emitting unit.
14. The display device as claimed in claim 1 , further comprising a wavelength conversion layer covering the light-emitting unit and the first protective layer.
15. The display device as claimed in claim 14 , further comprising a contact layer disposed between the light-emitting unit and the wavelength conversion layer.
16. The display device as claimed in claim 15 , wherein the contact layer comprises conductive materials.
17. The display device as claimed in claim 15 , further comprising a buffer layer disposed between the contact layer and the wavelength conversion layer.
18. The display device as claimed in claim 17 , wherein the buffer layer comprises insulating materials.
19. The display device as claimed in claim 1 , further comprising a light-shielding layer and a buffer layer disposed on the first protective layer, wherein an end of the buffer layer is between the first protective layer and the light-shielding layer.
20. The display device as claimed in claim 1 , wherein a difference between the elevation of the upper surface of the light-emitting unit and the elevation of the top surface of the first protective layer ranges from 0.02 μm to 5 μm.