Display Device

Patent metadata

Field	Value
Publication number	US-2025201157-A1
Application number	US-202418904655-A
Country	US
Kind code	A1
Filing date	Oct 2, 2024
Priority date	Dec 15, 2023
Publication date	Jun 19, 2025
Grant date	—

Abstract

A display device comprises a substrate having a plurality of sub pixels and one or more repair sub pixels disposed thereon, a high potential power line disposed in the plurality of sub pixels and the repair sub pixels, a driving transistor disposed in each of the plurality of sub pixels and each of the repair sub pixels, a sensing layer disposed on the high potential power line in each of the plurality of sub pixels and each of the repair sub pixels, an insulation layer disposed on the sensing layer in the plurality of sub pixels and the repair sub pixels, a light emitting element disposed between the sensing layer and the insulation layer in each of the plurality of sub pixels, and an additional light emitting element disposed on the insulation layer in the repair sub pixels.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a plurality of sub pixels and a repair sub pixel on the substrate; a high potential power line in the plurality of sub pixels and the repair sub pixel; a plurality of driving transistors, each driving transistor in a corresponding one of the plurality of sub pixels or the repair sub pixel; a plurality of light emitting elements on the high potential power line, each light emitting element in a corresponding one of the plurality of sub pixels; an insulation layer on the plurality of light emitting elements such that plurality of light emitting elements are between at least a portion of the insulation layer and the high potential power line; and an additional light emitting element in the repair sub pixel, the additional light emitting element on the insulation layer such that insulation layer is between the additional light emitting element and the high potential power line.

2 . The display device of claim 1 , further comprising:
a plurality of sensing layers, each sensing layer on the high potential power line in each of the plurality of sub pixels and the repair sub pixel.

3 . The display device of claim 2 , further comprising:
an adhesive layer between the plurality of sensing layers and the plurality of light emitting elements, wherein each sensing layer in the plurality of sub pixels is electrically connected to the high potential power line through a contact hole in the adhesive layer, and the sensing layer in the repair sub pixel is insulated from the high potential power line.

4 . The display device of claim 2 , further comprising:
a first connection electrode in a sub pixel from the plurality of sub pixels is on the insulation layer such that a portion of the first connection electrode is above a light emitting element of the plurality of light emitting elements that is in the sub pixel, the first connection electrode of the sub pixel electrically connected to a driving transistor from the plurality of driving transistors that is in the sub pixel; and a first connection electrode of the repair sub pixel is on the insulation layer such that a portion of the first connection electrode is between the additional light emitting element and the insulation layer, the first connection electrode of the repair sub pixel electrically connected to a driving transistor from the plurality of driving transistors that is in the repair sub pixel.

5 . The display device of claim 4 , wherein the additional light emitting element of the repair sub pixel is farther from the substrate than the first connection electrode of the repair sub pixel.

6 . The display device of claim 5 , wherein the first connection electrode of the repair sub pixel is electrically connected to the sensing layer of the repair sub pixel through a first contact hole in a portion of the insulation layer that is in the repair sub pixel, and the first connection electrode of the sub pixel is electrically connected to the light emitting element through a first contact hole in a portion of the insulation layer that is in the sub pixel.

7 . The display device of claim 6 , wherein the sensing layer of the sub pixel is spaced apart from the first connection electrode of the sub pixel with the light emitting element between the first connection electrode of the sub pixel and the sensing layer of the sub pixel.

8 . The display device of claim 6 , wherein a depth of the first contact hole of the sub pixel is less than a depth of the first contact hole of the repair sub pixel.

9 . The display device of claim 6 , further comprising:
a second connection electrode of the sub pixel that is above the light emitting element and is electrically connected to the light emitting element through a second contact hole in a portion of the insulation layer in the sub pixel and is electrically connected to the high potential power line; and a second connection electrode of the repair sub pixel that is electrically connected to the additional light emitting element through a second contact hole in a portion of the insulation layer in the repair sub pixel, wherein a portion of the second connection electrode of the repair sub pixel is between the additional light emitting element and the insulation layer.

10 . The display device of claim 9 , wherein a depth of the second contact hole of the sub pixel is less than a depth of the second contact hole of the repair sub pixel.

11 . The display device of claim 9 , wherein the second connection electrode of the repair sub pixel electrically connects the additional light emitting element to the high potential power line.

12 . The display device of claim 9 , further comprising:
a first bonding electrode connected to the additional light emitting element, the first bonding electrode between the first connection electrode of the repair sub pixel and the additional light emitting element; and a second bonding electrode connected to the additional light emitting element, the second bonding electrode between the second connection electrode of the repair sub pixel and the additional light emitting element, wherein the first bonding electrode fills the first contact hole of the repair sub pixel and the second bonding electrode fills the second contact hole of the repair sub pixel.

13 . The display device of claim 1 , wherein at least one of the plurality of light emitting elements is a light emitting diode having a lateral structure, and the additional light emitting element is a light emitting diode having a flip chip structure.

14 . The display device of claim 9 , further comprising:
a first planarization layer on the plurality of driving transistors, wherein the insulation layer comprises:
a second planarization layer on the plurality of sensing layers, the second planarization layer having an opening that overlaps the first contact hole and the second contact hole of the sub pixel and the first contact hole and the second contact hole of the repair sub pixel; and
a third planarization layer on the second planarization layer,
wherein the light emitting element of the sub pixel is in the opening of the second planarization layer, and the third planarization layer is in the opening of the second planarization layer in the repair sub pixel.

15 . The display device of claim 9 , wherein a depth of the first contact hole of the sub pixel is greater than a depth of the second contact hole of the sub pixel, and a depth of the first contact hole of the repair sub pixel is greater than a depth of the second contact hole of the repair sub pixel.

16 . A display device comprising:
a substrate; a sub pixel and a repair sub pixel on the substrate; a first driving transistor in the sub pixel and a second driving transistor in the repair sub pixel; a high potential power line in the sub pixel and the repair sub pixel; a first insulating layer on the high potential power line in the sub pixel and the repair sub pixel; a second insulating layer on the first insulating layer in the sub pixel and the repair sub pixel; a first light emitting element in the sub pixel, the first light emitting element electrically connected to the first driving transistor; a second light emitting element in the repair sub pixel, the second light emitting element connected to the second driving transistor; a first connection electrode in the sub pixel that is electrically connected to the first light emitting element and is disposed in a first contact hole that extends through the second insulating layer without extending through th

Assignees

• Lg Display Co Ltd

Inventors

• Lee Sumin
• Lee Byunghyun
• Seo Daeyoung
• Kim Minseok
• Kim Taeyong

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10P74/273

  Interconnections for measuring or testing, e.g. probe pads · CPC title

• H10D86/411

  characterised by materials, geometry or structure of the substrates · CPC title

• H10D86/451

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

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title