Display device

Patent metadata

Field	Value
Publication number	US-2025275363-A1
Application number	US-202418978765-A
Country	US
Kind code	A1
Filing date	Dec 12, 2024
Priority date	Feb 26, 2024
Publication date	Aug 28, 2025
Grant date	—

Abstract

A display device may include: a substrate; a display area having subpixels; an optical area in the display area; a transistor in each subpixel; a first planarization layer disposed on the transistor; a second planarization layer disposed on the first planarization layer; a third planarization layer disposed on the second planarization layer and exposing a top surface of the second planarization layer; an anode disposed in each subpixel and covering the top surface of the second planarization layer and a part of the third planarization layer; a dam structure disposed on the substrate and including a first layer formed of the same layer as the second planarization layer, and a second layer formed of the same layer as the third planarization layer; and first patterns disposed along the dam structure, each first pattern having a planar shape including a curved line.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a display area in which a plurality of subpixels is disposed; an optical area; a non-display area outside the display area; a transistor disposed in each of the plurality of subpixels on the substrate; a first planarization layer disposed on the transistor; a second planarization layer disposed on the first planarization layer; a third planarization layer disposed on the second planarization layer and configured to expose parts of a top surface of the second planarization layer; an anode disposed in each of the plurality of subpixels and configured to cover a part of the top surface of the second planarization layer and a part of the third planarization layer; a dam structure disposed on the substrate and comprising a first layer formed of a same layer as the second planarization layer, and a second layer formed of a same layer as the third planarization layer; and a plurality of first patterns disposed along the dam structure, wherein each of the plurality of first patterns has a planar shape including a curved line.

2 . The display device of claim 1 , wherein the planar shape of each of the plurality of first patterns is any one of a rectangular shape with rounded corners, a circular shape, and an elliptical shape.

3 . The display device of claim 1 , further comprising:
a second pattern disposed between the plurality of first patterns and the dam structure and configured to surround a through-hole in the optical area.

4 . The display device of claim 1 , wherein each of the plurality of first patterns comprises:
a first layer formed of a same layer as the second planarization layer; and a second layer formed of a same layer as the third planarization layer.

5 . The display device of claim 1 , further comprising:
a bank disposed to cover a part of the third planarization layer and a part of the anode, wherein the dam structure further comprises a third layer formed of a same layer as the bank.

6 . A display device, comprising:
a substrate; a display area; a non-display area configured to surround the display area; a first planarization layer disposed on the substrate; a second planarization layer disposed on the first planarization layer; a third planarization layer disposed on the second planarization layer and configured to expose a top surface of the second planarization layer; an anode disposed to cover a part of the second planarization layer and a part of the third planarization layer; a dam structure disposed in the non-display area on the substrate while surrounding the display area and comprising a first layer formed of a same layer as the second planarization layer, and a second layer formed of a same layer as the third planarization layer; and a plurality of patterns disposed between the dam structure and the display area along the dam structure, wherein each of the plurality of patterns has a planar shape including a curved line.

7 . The display device of claim 6 , wherein the planar shape of each of the plurality of patterns is any one of a rectangular shape with rounded corners, a circular shape, and an elliptical shape.

8 . The display device of claim 6 , wherein each of the plurality of patterns comprises:
a first layer formed of a same layer as the second planarization layer; and a second layer formed of a same layer as the third planarization layer.

9 . The display device of claim 8 , wherein:
a first metal layer is disposed on the second layer, wherein the first metal layer is formed of a same layer as the anode without being electrically connected to the anode.

10 . The display device of claim 6 , further comprising:
a bank disposed on the third planarization layer and configured to expose a part of the anode, wherein the dam structure further comprises a third layer formed of a same layer as the bank.

11 . A display device, comprising:
a substrate; a display area; a non-display area; one or more planarization layers disposed on the substrate, wherein the one or more planarization layers comprise a lower top surface and an upper top surface; an anode disposed on the lower top surface and a part of the upper top surface of the one or more planarization layers, wherein the lower top surface corresponds to an area including a first light-emitting area, and wherein each of the lower top surface and the upper top surface faces away from the substrate; and a dam structure disposed on the substrate and comprising one or more dam layers formed of one or more same layers as the one or more planarization layers.

12 . The display device of claim 11 , wherein the dam structure surrounds the display area or a through-hole of an optical area.

13 . The display device of claim 11 , comprising:
a plurality of patterns disposed adjacent to and along the dam structure, wherein: each of the plurality of patterns forms a discrete island; and each of the plurality of patterns has a planar shape including one or more curved portions.

14 . The display device of claim 13 , wherein each of the plurality of patterns comprises:
one or more pattern layers formed of one or more same layers as the one or more planarization layers.

15 . The display device of claim 11 , wherein the dam structure further comprises:
a second dam layer disposed on the one or more dam layers and formed of a same layer as a bank in the display area; and a third dam layer disposed on the second dam layer and formed of a same layer as a spacer in the non-display area.

16 . The display device of claim 15 , wherein the dam structure further comprises:
a fourth dam layer disposed below the one or more dam layers and formed of a layer same as a first planarization layer disposed below the one or more planarization layers.

17 . The display device of claim 11 , further comprising:
one or more auxiliary dams disposed between the display area and the dam structure, wherein each of the one or more auxiliary dams is formed of a same layer as one of the one or more planarization layers.

18 . The display device of claim 14 , wherein:
a light-emitting layer is disposed on the one or more pattern layers and an area adjacent to the one or more pattern layers; an undercut structure is disposed below the one or more pattern layers; and the light-emitting layer on the one or more pattern layers is disconnected, from the light-emitting layer on the area adjacent to the one or more pattern layers, by the undercut structure.

19 . The display device of claim 14 , wherein:
a first metal layer is disposed on the one or more pattern layers, wherein the first metal layer is formed of a same layer as the anode without being electrically connected to the anode; one or more metal layers are disposed below the one or more pattern layers; and the first metal layer is connected to the one or more metal layers and a cathode.

20 . The display device of claim 14 , wherein:
the first light-emitting area is enclosed by a first non-light-emitting area; the first non-light-emitting area is enclosed by a second light-emitting area; and the second light-emitting area is enclosed by a second non-light-emitting area.

21 . The display device of claim 20 , wherein:
the first light-emitting area corresponds to an area in which a top surface of the anode is exposed by a bank; the first non-light-emitting area corresponds to an area in which the anode disposed on the lower

Assignees

• Lg Display Co Ltd

Inventors

• Kook Yunho
• Park Jonghan
• Ahn Seonwoo
• Yoon Jihyang
• Song Chaeeun
• Nam Seunghee

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K59/1213 Primary

  the pixel elements being TFTs · CPC title