Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11049929-B2
Application number	US-202016804152-A
Country	US
Kind code	B2
Filing date	Feb 28, 2020
Priority date	Jun 14, 2019
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A display device includes: a substrate; a first thin film transistor and a second thin film transistor arranged over the substrate; a display element connected to the first thin film transistor; a wiring connected to the second thin film transistor and including a first wiring layer and a second wiring layer; a pattern insulating layer arranged between the first wiring layer and the second wiring layer; a planarization layer covering the wiring; and a connection electrode arranged on the planarization layer and connected to the first wiring layer and the second wiring layer respectively through a first contact hole and a second contact hole.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a first thin film transistor disposed over the substrate;
a second thin film transistor disposed over the substrate;
a display element connected to the first thin film transistor;
a wiring connected to the second thin film transistor, wherein the wiring includes a first wiring layer and a second wiring layer disposed on a different layer than the first wiring layer;
a pattern insulating layer disposed between the first wiring layer and the second wiring layer;
a planarization layer covering the wiring; and
a connection electrode disposed on the planarization layer and connected to the first wiring layer and the second wiring layer through a first contact hole and a second contact hole, respectively.

2. The display device of claim 1 , wherein
a bottom surface of the second wiring layer has a same area as an entirety of an area defining a top surface of the pattern insulating layer.

3. The display device of claim 1 , wherein
a lateral surface of the second wiring layer is connected to a lateral surface of the pattern insulating layer.

4. The display device of claim 1 , wherein
the display element includes a pixel electrode, an emission layer, and an opposite electrode, and
the connection electrode includes a same material as a material of the pixel electrode and is disposed in a same layer as the pixel electrode.

5. The display device of claim 1 , wherein
an area of the first wiring layer is different from an area of the second wiring layer.

6. The display device of claim 1 , wherein
the planarization layer contacts a lateral surface of the pattern insulating layer.

7. The display device of claim 1 , further comprising:
a capacitor including a first electrode and a second electrode,
wherein the first electrode including a same material as a material of a gate electrode of the first thin film transistor, and
the second electrode overlaps the first electrode, includes a same material as a material of the first wiring layer, and is disposed in a same layer as the first wiring layer.

8. The display device of claim 1 , further comprising:
a bias electrode disposed below the first thin film transistor.

9. The display device of claim 8 , wherein
the bias electrode is connected to a source electrode or a drain electrode of the first thin film transistor.

10. The display device of claim 1 , wherein
the wiring includes a data line which provides a data signal to the second thin film transistor.

11. The display device of claim 1 , further comprising:
a thin-film encapsulation layer covering the display element,
wherein the thin-film encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer, which are stacked one on another.

12. The display device of claim 1 , further comprising:
a sealing substrate disposed opposite to the substrate.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeon Kyungjin
• PARK Joonseok
• Koo Soyoung
• Kim Myounghwa
• Kim Eoksu
• Kim Taesang
• Kim Hyungjun
• Moon Yeonkeon
• Park Geunchul
• Sohn Sangwoo
• LIM Junhyung
• Choi Hyelim

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• H10D30/6723 Primary

  having light shields · CPC title

• H10D86/481

  integrated with passive devices, e.g. auxiliary capacitors · CPC title