Display device

1. A display device, comprising:

a substrate with a display region and a border region surrounding the display region;

a first metal layer disposed on the substrate;

a first insulating layer disposed on the first metal layer and having a first contact via on the border region;

a second metal layer disposed on the first insulating layer and in the first contact via to electrically connect to the first metal layer;

a second insulating layer disposed on the second metal layer; a first electrode layer disposed on the second insulating layer and having at least one first opening on the border region;

a third insulating layer disposed on the first electrode layer and having a second opening on the border region;

a second electrode layer disposed on the third insulating layer and in the second opening to electrically connect to the first electrode layer,

wherein the first contact via corresponds to the first opening; and

wherein in a cross-section of the display device, the first opening has a first side and a second side opposite to the first side, the first contact via has a third side and a fourth side opposite to the third side, the first side is relatively close to the third side, the second side is relatively close to the fourth side, and a distance between the first side and the third side is different from that between the second side and the fourth side,

wherein in the cross-section of the display device, the first opening has a first central line, the first contact via has a second central line, and the first central line is not overlapped with the second central line.

2. The display device as claimed in claim 1 , wherein the second opening and the first opening are not aligned to each other.

3. The display device as claimed in claim 1 , wherein the third insulating layer further has a third opening, and the first opening locates between the second opening and the third opening,

wherein, in the cross-section of the display device, the third insulating layer covers the first electrode layer and has a curved surface between the second opening and the third opening,

wherein, in the cross-section of the display device, the curved surface has a first end and a second end, a first distance is between the first end and the first side, a second distance is between the second end and the second side, and the first distance and the second distance are different.

4. The display device as claimed in claim 1 , wherein a thickness of the second electrode layer on the third insulating layer is different from another thickness thereof in the second opening.

5. The display device as claimed in claim 1 , wherein the display device is an OLED display device.

6. A display device, comprising:

a substrate with a display region and a border region surrounding the display region;

a first metal layer disposed on the substrate;

a second metal layer disposed on the first metal layer;

a first insulating layer disposed between the first metal layer and the second metal layer, wherein the first insulating layer has a first contact via, and the second metal layer is disposed in the first contact via to electrically connect to the first metal layer;

a second insulating layer disposed on the second metal layer; a first electrode layer disposed on the second insulating layer and having a first opening on the border region;

a second electrode layer disposed on the first electrode layer;

a third insulating layer disposed between the first electrode layer and the second electrode layer, and further disposed in the first opening to contact with the second insulating layer,

wherein the first contact via corresponds to the first opening;

wherein in a cross-section of the display device, the first opening has a first side and a second side opposite to the first side, the first contact via has a third side and a fourth side opposite to the third side, the first side is relatively close to the third side, the second side is relatively close to the fourth side, and a distance between the first side and the third side is different from that between the second side and the fourth side,

wherein in the cross-section of the display device, the first opening has a first central line, the first contact via has a second central line, and the first central line is not overlapped with the second central line.

7. The display device as claimed in claim 6 , wherein the second opening and the first opening are not aligned to each other.

8. The display device as claimed in claim 6 , wherein the third insulating layer further has a third opening, and the first opening locates between the second opening and the third opening,

wherein, in the cross-section of the display device, the third insulating layer covers the first electrode layer and has a curved surface 5 between the second opening and the third opening,

wherein, in the cross-section of the display device, the curved surface has a first end and a second end, a first distance is between the first end and the first side, a second distance is between the second end and the second side, and the first distance and the second distance are different.

9. The display device as claimed in claim 6 , wherein a thickness of the second electrode layer on the third insulating layer is different from another thickness thereof in the second opening.

10. The display device as claimed in claim 6 , wherein the display device is an OLED display device.