Display device

Patent metadata

Field	Value
Publication number	US-12568757-B2
Application number	US-202217886997-A
Country	US
Kind code	B2
Filing date	Aug 12, 2022
Priority date	Sep 3, 2021
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A display device includes a substrate which includes an active area including a plurality of sub pixels and a non-active area, and is formed of one of transparent conductive oxide or an oxide semiconductor layer, an insulating layer on the substrate, a plurality of thin film transistors which is on the insulating layer and includes an active layer having a channel region, a gate electrode, a source electrode, and a drain electrode and a plurality of light emitting diodes disposed in the plurality of sub pixels on the insulating layer, wherein the substrate includes a plurality of holes which overlap with at least a part of the active layer.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate which includes an active area including a plurality of sub pixels and a non-active area, and is formed of transparent conductive oxide or an oxide semiconductor layer; an insulating layer disposed on the substrate; a plurality of thin film transistors disposed on the insulating layer and including an active layer having a channel region, a gate electrode, a source electrode, and a drain electrode; and a plurality of light emitting diodes disposed in the plurality of sub pixels and disposed on the insulating layer, wherein the substrate includes a plurality of holes, and wherein at least some of the plurality of holes overlap an entire active layer of a respective one of the plurality of thin film transistors.

2 . The display device according to claim 1 , wherein the plurality of holes overlap with the channel region of the active layer.

3 . The display device according to claim 1 , further comprising a plurality of light shielding layers disposed between the insulating layer and the plurality of thin film transistors, and overlapping with at least a part of the active layer.

4 . The display device according to claim 3 , wherein the plurality of holes overlap with the active layer that does not overlap with the plurality of light shielding layers.

5 . The display device according to claim 3 , wherein the plurality of holes overlap with the channel region of the active layer that does not overlap with the plurality of light shielding layers.

6 . The display device according to claim 1 , wherein the plurality of thin film transistors is disposed between the insulating layer and the plurality of light emitting diodes in the plurality of sub pixels.

7 . The display device according to claim 1 , further comprising a gate driver disposed in the non-active area,
wherein the plurality of thin film transistors is disposed in the gate driver.

8 . The display device according to claim 7 , wherein the non-active area includes a gate in panel region including the gate driver and a pad region in which the plurality of pads is disposed.

9 . The display device according to claim 8 , wherein the substrate overlap with the gate in panel region and the pad region, and the plurality of holes is disposed only in the gate in panel region in the non-active area.

10 . The display device according to claim 8 , further comprising a plurality of light shielding layers which overlap with at least a part of the active layer in the gate in panel region, wherein the plurality of holes overlap with the active layer which does not overlap with the plurality of light shielding layers.

11 . A display device, comprising:
a substrate including an active area and a non-active area disposed outside the active area; a plurality of thin film transistors including an active layer having a source region, a drain region, and a channel region disposed on the substrate; and an insulating layer disposed between the plurality of thin film transistors and the substrate, wherein the substrate is formed of transparent conductive oxide or oxide semiconductor and includes a plurality of holes, and wherein at least some of the plurality of holes overlap an entire active layer of a respective one of the plurality of thin film transistors.

12 . The display device according to claim 11 , wherein the plurality of holes overlap with the channel region.

13 . The display device according to claim 11 , wherein the plurality of holes overlap with the active layer.

14 . The display device according to claim 11 , further comprising a plurality of light shielding layers overlapping with at least a part of the active layer between the substrate and the insulating layer,
wherein the plurality of holes overlap with the active layer that does not overlap with the plurality of light shielding layers.

15 . The display device according to claim 11 , further comprising a gate driver disposed in the non-active area,
wherein the active layer having the source region, the drain region, and the channel region is disposed in the gate driver.

16 . The display device according to claim 15 , wherein the non-active area includes a gate in panel region including the gate driver and a pad region in which the plurality of pads is disposed, the substrate overlap with the gate in panel region and the pad region, and the plurality of holes 1s disposed only in the gate in panel region in the non-active area.

17 . The display device according to claim 16 , further comprising a plurality of light shielding layers which overlap with least a part of the active layer in the gate in panel region,
wherein the plurality of holes overlap with the active layer that does not overlap with the plurality of light shielding layers.

18 . The display device according to claim 1 , further comprising an oxide semiconductor cover layer disposed between the substrate and the insulating layer to cover the substrate,
wherein the substrate is formed of a transparent conductive oxide, and wherein the oxide semiconductor cover layer includes: a plurality of protrusions filling the plurality of holes; and a base unit disposed on the plurality of protrusions and the substrate.

19 . The display device according to claim 1 , further comprising a plurality of oxide semiconductors that fills the plurality of holes,
wherein the substrate is formed of a transparent conductive oxide.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Chanwoo
• Lee Jungil
• Hyun Myeonghak

Classifications

• H10K2102/311

  Flexible OLED · CPC title

• H10K59/1213 Primary

  the pixel elements being TFTs · CPC title

• H10K59/126

  Shielding, e.g. light-blocking means over the TFTs · CPC title

• B32B2307/7246

  Water vapor barrier · CPC title

• B32B2307/7244

  Oxygen barrier · CPC title