Electroluminescence display apparatus

Patent metadata

Field	Value
Publication number	US-10734595-B2
Application number	US-201916430732-A
Country	US
Kind code	B2
Filing date	Jun 4, 2019
Priority date	Dec 20, 2018
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

An electroluminescence display apparatus includes a substrate including a display area and a non-display area. The non-display area includes a bending area and a link area. A first power supply electrode is in the link area. A second power supply electrode is in the non-display area. The second power supply electrode surrounds at least three sides of the display area, and both ends of the second power supply electrode in the link area. A protective layer covers the first power supply electrode and the second power supply electrode in the link area. A first planarizing layer covers one side of the first power supply electrode; and a second planarizing layer is on a contact hole of the protective layer that exposes the first power supply electrode and the second power supply electrode. The first planarizing layer is not on the contact hole.

First claim

What is claimed is:

1. An electroluminescence display apparatus, comprising:
a substrate including a display area and a non-display area,
wherein the non-display area surrounds the display area and includes a pad area, a bending area, and a link area;
a plurality of thin film transistors on the substrate in the display area;
a first power supply electrode on the substrate in the link area of the non-display area,
wherein the link area is between the bending area and the display area;
a second power supply electrode on the substrate in the non-display area;
a gate driver in the non-display area and between the second power supply electrode and the display area;
a protective layer covering the plurality of thin film transistors, the gate driver, the first power supply electrode, and the second power supply electrode;
a first planarizing layer covering the plurality of thin film transistors and the gate driver;
a second planarizing layer on the first planarizing layer in the non-display area, the second planarizing layer including a first opening that exposes a surface of the first planarizing layer in an area overlapping the gate driver; and
a plurality of light emitting elements on the second planarizing layer in the display area.

2. The electroluminescence display apparatus according to claim 1 , wherein the first power supply electrode includes a first area having a first line width and a second area having a second line width that is larger than the first line width.

3. The electroluminescence display apparatus according to claim 2 , wherein, in the link area of the non-display area, the first area of the first power supply electrode is between the second power supply electrode and the display area.

4. The electroluminescence display apparatus according to claim 1 , wherein, in the non-display area, the protective layer includes a contact hole that exposes the second power supply electrode.

5. The electroluminescence display apparatus according to claim 4 , further comprising:
a connection electrode connected to the second power supply electrode exposed through the contact hole of the protective layer in the non-display area.

6. The electroluminescence display apparatus according to claim 5 , wherein, in the non-display area, the first planarizing layer includes a second opening that exposes a surface of the protective layer in an area overlapping the second power supply electrode.

7. The electroluminescence display apparatus according to claim 3 , further comprising:
a first dam and a second dam that overlap the second power supply electrode.

8. The electroluminescence display apparatus according to claim 1 , wherein, in the link area of the non-display area, the first planarizing layer is not in an area overlapping the second power supply electrode.

9. The electroluminescence display apparatus according to claim 7 , wherein, in the link area of the non-display area, the first dam and the second dam overlap the second area of the first power supply electrode.

10. The electroluminescence display apparatus according to claim 9 , wherein, in the link area of the non-display area, the first dam and the second dam do not overlap the first area of the first power supply electrode.

11. An electroluminescence display apparatus, comprising:
a substrate including a display area and a non-display area,
wherein the non-display area includes a bending area and a link area, and
wherein the link area is between the display area and the bending area;
a first power supply electrode in the link area of the non-display area;
a second power supply electrode in the non-display area, the second power supply electrode surrounding at least three sides of the display area, and both ends of the second power supply electrode in the link area;
a protective layer covering the first power supply electrode and the second power supply electrode in the link area of the non-display area;
a first planarizing layer covering one side of the first power supply electrode; and
a second planarizing layer on a contact hole of the protective layer that exposes the first power supply electrode and the second power supply electrode,
wherein the first planarizing layer is not on the contact hole of the protective layer.

12. The electroluminescence display apparatus according to claim 11 , wherein both ends of the first power supply electrode have a first line width, and a center portion of the first power supply electrode has a second line width that is larger than the first line width.

13. The electroluminescence display apparatus according to claim 12 , wherein both ends of the second power supply electrode face each other in the link area, one end of the first power supply electrode is in the link area and between one end of the second power supply electrode and the display area, and the other end of the first power supply electrode is between the other end of the second power supply electrode and the display area.

14. The electroluminescence display apparatus according to claim 13 , wherein the one end of the second power supply electrode and the one end of the first power supply electrode are spaced apart from each other in the link area, and the protective layer is in a space formed by the one end of the second power supply electrode and the one end of the first power supply electrode that are spaced apart from each other.

15. The electroluminescence display apparatus according to claim 14 , wherein the second planarizing layer is in direct contact with an upper surface of the protective layer in the space formed by the one end of the second power supply electrode and the one end of the first power supply electrode that are spaced apart from each other.

16. The electroluminescence display apparatus according to claim 11 , wherein the first power supply electrode is formed by a lower electrode layer and an upper electrode layer on the lower electrode layer.

17. The electroluminescence display apparatus according to claim 16 , wherein the first planarizing layer covers one side of the lower electrode layer of the first power supply electrode, and the lower electrode layer is exposed through the contact hole of the protective layer.

18. The electroluminescence display apparatus according to claim 17 , wherein the upper electrode layer of the first power supply electrode is disposed on the protective layer and is connected to the lower electrode layer through the contact hole of the protective layer that exposes the lower electrode layer.

19. The electroluminescence display apparatus according to claim 18 , wherein the upper electrode layer covers one side of the first planarizing layer.

20. The electroluminescence display apparatus according to claim 16 , wherein the lower electrode layer of the first power supply electrode is on the same layer as the second power supply electrode and is formed of the same material as the second power supply electrode.

Assignees

• Lg Display Co Ltd

Inventors

• Um Hyunchul
• Park Jongchan
• Lee Taewon

Classifications

• H10K59/805

  Electrodes · CPC title

• H10K50/805

  Electrodes · CPC title

• H10D86/443 Primary

  adapted for preventing breakage, peeling or short circuiting · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/451 Primary

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title