Electrostatic discharge protection device and display device including same

Patent metadata

Field	Value
Publication number	US-2025275257-A1
Application number	US-202519065712-A
Country	US
Kind code	A1
Filing date	Feb 27, 2025
Priority date	Feb 28, 2024
Publication date	Aug 28, 2025
Grant date	—

Abstract

An electrostatic discharge protection device can include a first electrode extending in a first direction, an active layer, and a second electrode. The active layer has a first width in the first direction, and overlaps the first electrode. The active layer includes at least one hole in an overlapping region, and is disposed longer outwardly than one or more sides of the first electrode in a second direction intersecting the first direction. The second electrode is disposed side by side with the first electrode and includes a first connection portion to one side of the active layer.

First claim

What is claimed is:

1 . An electrostatic discharge protection device, comprising:
a first electrode extending in a first direction; an active layer having a first width in the first direction, and configured to overlap the first electrode, wherein the active layer comprises at least one hole in an overlapping region with the first electrode, and wherein the active layer is disposed longer outwardly than some sides of the first electrode in a second direction intersecting the first direction; and a second electrode disposed parallel to the first electrode and having a first connection portion connected to one end of the active layer.

2 . The electrostatic discharge protection device according to claim 1 , wherein the active layer has at least one heat spreading pattern protruding outwardly in the second direction.

3 . The electrostatic discharge protection device according to claim 1 , wherein the active layer comprises a plurality of active layer patterns spaced apart from each other in the first direction, each of the plurality of active layer patterns overlapping the first electrode and the second electrode.

4 . The electrostatic discharge protection device according to claim 1 , further comprising a third electrode having a second connection portion connected to the active layer at a position opposite to the first connection portion with the first electrode therebetween.

5 . The electrostatic discharge protection device according to claim 4 , wherein the first electrode and the third electrode are connected to each other.

6 . The electrostatic discharge protection device according to claim 5 , wherein the first electrode and the third electrode are connected at a region not overlapping the active layer.

7 . The electrostatic discharge protection device according to claim 5 , wherein the first electrode is located at a different layer from the second electrode and the third electrode, and the third electrode overlaps the first electrode.

8 . The electrostatic discharge protection device according to claim 1 , wherein the first electrode has a second connection portion connected to the active layer at a position opposite to the first connection portion.

9 . The electrostatic discharge protection device according to claim 3 , further comprising a light blocking pattern overlapping at least one of the plurality of active layer patterns under the active layer.

10 . The electrostatic discharge protection device according to claim 9 , wherein the light blocking pattern integrally overlaps the plurality of active layer patterns.

11 . The electrostatic discharge protection device according to claim 9 , wherein the light blocking pattern alternately overlaps the plurality of active layer patterns.

12 . The electrostatic discharge protection device according to claim 1 , wherein the at least one hole of the active layer is distributed in a region overlapping the first electrode and in a region not overlapping the first electrode in the active layer.

13 . The electrostatic discharge protection device according to claim 1 , wherein the active layer comprises an oxide semiconductor.

14 . The electrostatic discharge protection device according to claim 13 , wherein an external signal is applied to the first electrode and a power voltage is applied to the second electrode.

15 . The electrostatic discharge protection device according to claim 1 , wherein the first electrode and the second electrode are located at a same layer.

16 . A display device, comprising:
a substrate comprising an active area comprising a plurality of sub-pixels and a non-active area adjacent to the active area; and an electrostatic discharge protection device provided at the non-active area, wherein the electrostatic discharge protection device comprises:
a first electrode extending in a first direction;
an active layer having a first width in the first direction, and overlapping the first electrode, wherein the active layer comprises at least one hole in an overlapping region with the first electrode, and is disposed longer outwardly than one or more sides of the first electrode in a second direction intersecting the first direction; and
a second electrode disposed parallel to the first electrode and having a first connection portion connected to one end of the active layer.

17 . The display device according to claim 16 , wherein the substrate comprises a pad portion and a gate-in-panel at the non-active area, and the electrostatic discharge protection device is provided between the pad portion and the gate-in-panel.

18 . The display device according to claim 17 , further comprising a line-on-glass block between the pad portion and the gate-in-panel.

19 . The display device according to claim 16 , wherein each of the plurality of sub-pixels comprises a transistor comprising an oxide semiconductor.

Assignees

• Lg Display Co Ltd

Inventors

• Kwak Do Hun
• Kang Min Gu
• Kim Ki Tae
• Kim Dae Hwan

Classifications

• H10D86/423

  comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO · CPC title

• H10D86/481

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

• H10D89/931

  characterised by the dispositions of the protective arrangements · CPC title

• H10D89/811 Primary

  using FETs as protective elements · CPC title

• H10D89/921 Primary

  characterised by the configuration of the interconnections connecting the protective arrangements, e.g. ESD buses · CPC title