Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2020350513-A1
Application number	US-202016861691-A
Country	US
Kind code	A1
Filing date	Apr 29, 2020
Priority date	May 3, 2019
Publication date	Nov 5, 2020
Grant date	—

Abstract

A display device includes a first island that includes a first display element disposed on a substrate, a second island that includes a second display element disposed on the substrate and spaced apart from the first island, a plurality of connection parts that connect the first island to the second island, through parts formed between the plurality of connection parts and that penetrate into the substrate, and an encapsulation layer that seals the first and second islands, and that includes a first inorganic encapsulation layer and a second inorganic encapsulation layer. The encapsulation layer of the first island includes an organic encapsulation layer, and the encapsulation layer of the second island does not include an organic encapsulation layer.

First claim

What is claimed is:

1 . A display device, comprising:
a first island that includes a first display element disposed on a substrate; a second island that includes a second display element disposed on the substrate wherein the second island is spaced apart from the first island; a plurality of connection parts that connect the first island to the second island; through parts formed between the plurality of connection parts and that penetrate into the substrate; and an encapsulation layer that seals the first and second islands, wherein the encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, wherein the encapsulation layer of the first island includes an organic encapsulation layer, and the encapsulation layer of the second island does not include an organic encapsulation layer.

2 . The display device of claim 1 , wherein
the organic encapsulation layer covers dust material contained in the first island.

3 . The display device of claim 1 , wherein
the first inorganic encapsulation layer and the second inorganic encapsulation layer are further disposed on the plurality of connection parts.

4 . The display device of claim 1 , wherein
the first inorganic encapsulation layer and the second inorganic encapsulation layer cover sides of the through parts.

5 . The display device of claim 1 , further comprising:
wirings disposed in the plurality of connection parts and that transmit electrical signals to the first and second islands; and a step difference compensation layer disposed between a substrate of the plurality of connection parts and the wirings wherein the step difference compensation layer includes an organic material.

6 . The display device of claim 1 , wherein
the first inorganic encapsulation layer and the second inorganic encapsulation layer in the first island are in contact with each other beyond an edge of the organic encapsulation layer.

7 . The display device of claim 1 , wherein
the organic encapsulation layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

8 . The display device of claim 1 , wherein
each of the first and second display elements includes a pixel electrode, an intermediate layer, and an opposite electrode, and the pixel electrode is positioned on a top surface of a planarization layer, and a pixel-defining layer is positioned on the planarization layer and covers edges of the pixel electrode.

9 . The display device of claim 8 , wherein
the first inorganic encapsulation layer covers dust material contained on the opposite electrode.

10 . The display device of claim 8 , further comprising:
a thin-film transistor disposed between the substrate and the planarization layer; a lower planarization layer disposed between the thin-film transistor and the planarization layer; and a connection metal disposed on the lower planarization layer.

11 . The display device of claim 1 , further comprising
a dam part disposed on the first inorganic encapsulation layer of the first island and surrounds the organic encapsulation layer.

12 . A method of manufacturing a display device, the method comprising:
forming a plurality of islands, wherein the plurality of islands include display elements disposed on a substrate and are spaced apart from each other; sealing each of the plurality of islands with an encapsulation layer that includes a first inorganic encapsulation layer and a second inorganic encapsulation layer; detecting dust material contained on a first island and recording coordinate information about the dust material before or after forming the first inorganic encapsulation layer; and forming an organic encapsulation layer on the first island that covers the dust material using the recorded coordinate information about the dust material.

13 . The method of claim 12 , wherein
the first inorganic encapsulation layer and the second inorganic encapsulation layer include inorganic insulating layers.

14 . The method of claim 12 , wherein
the first inorganic encapsulation layer and the second inorganic encapsulation layer are formed using chemical vapor deposition.

15 . The method of claim 12 , wherein
the organic encapsulation layer is formed using inkjet printing or three-dimensional printing.

16 . The method of claim 12 , wherein
the organic encapsulation layer is not formed on an island in which no dust material is detected.

17 . The method of claim 12 , wherein
the plurality of islands are connected by a plurality of connection parts, and the method further comprises forming through parts between the plurality of connection parts that penetrate into a substrate.

18 . A display device, comprising:
a plurality of islands spaced apart from each other, where each island includes a display element disposed on a substrate; a plurality of connection parts that interconnect the plurality of islands; through parts formed between the plurality of connection parts and that penetrate into the substrate; and an encapsulation layer that covers the plurality of islands, wherein the encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, wherein the encapsulation layer includes an organic encapsulation layer on an island that contains dust material.

19 . The display device of claim 18 , wherein the organic encapsulation layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer on the island that contains dust material, and the first inorganic encapsulation layer and the second inorganic encapsulation layer in the island that contains dust material are in contact with each other beyond an edge of the organic encapsulation layer.

20 . The display device of claim 18 , further comprising
a dam part disposed on the first inorganic encapsulation layer of the island that contains the dust material and that surrounds the organic encapsulation layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Junhyeong
• Hong Jongho
• Joo Hyejin

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8731 Primary

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K50/844

  Encapsulations · CPC title