Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12364108-B2
Application number	US-202217743376-A
Country	US
Kind code	B2
Filing date	May 12, 2022
Priority date	Aug 30, 2021
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A display device may include a transistor substrate including a driving element, and having a display area, and a non-display area surrounding the display area, a bank layer on the non-display area of the transistor substrate, and exposing an outer area of the non-display area of the transistor substrate that is opposite to the display area, an inorganic insulating layer covering an upper surface of the bank layer, a side surface of the bank layer, and the outer area of the transistor substrate, a low refractive layer on the inorganic insulating layer, and a first color filter layer on the non-display area to cover a portion of an upper surface of the inorganic insulating layer, and a side surface of the inorganic insulating layer.

First claim

What is claimed is:

1. A display device, comprising:
a transistor substrate comprising a driving element, and having a display area, and a non-display area surrounding the display area;
a bank layer on the non-display area of the transistor substrate, and exposing an outer area of the non-display area of the transistor substrate that is opposite to the display area;
an inorganic insulating layer covering an upper surface of the bank layer, a side surface of the bank layer, and the outer area of the transistor substrate;
a low refractive layer on the inorganic insulating layer; and
a first color filter layer on the non-display area to cover a portion of an upper surface of the inorganic insulating layer, and a side surface of the inorganic insulating layer.

2. The display device of claim 1 , wherein the first color filter layer seals the bank layer, and
wherein a side surface of the first color filter layer is exposed to an outside.

3. The display device of claim 1 , further comprising a second color filter layer on the first color filter layer on the non-display area.

4. The display device of claim 3 , further comprising a third color filter layer on the second color filter layer on the non-display area.

5. The display device of claim 4 , wherein the first color filter layer seals the bank layer, and side surfaces of the first to third color filter layers are exposed to an outside.

6. The display device of claim 1 , wherein the inorganic insulating layer covers the outer area of the transistor substrate.

7. The display device of claim 1 , wherein the low refractive layer overlaps the bank layer on the upper surface of the inorganic insulating layer.

8. The display device of claim 1 , further comprising a light emitting element on and connected to the driving element.

9. The display device of claim 8 , further comprising:
a color converting layer on the light emitting element to overlap the light emitting element;
a second color filter layer on the color converting layer; and
a third color filter layer on the first color filter layer,
wherein the second color filter layer is a same as one of the first or third color filter layers.

10. A display device, comprising:
a transistor substrate comprising a driving element, and having a display area, and a non-display area surrounding the display area;
a bank layer on the non-display area of the transistor substrate, and exposing an outer area of the non-display area of the transistor substrate that is opposite to the display area; and
a first color filter layer on the outer area of the transistor substrate, sealing the bank layer, and having a side surface exposed to an outside.

11. The display device of claim 10 , further comprising:
a second color filter layer on the first color filter layer; and
a third color filter layer on the second color filter layer.

12. The display device of claim 11 , further comprising a light emitting element on and connected to the driving element.

13. The display device of claim 12 , further comprising:
a color converting layer overlapping the light emitting element; and
a fourth color filter layer on the color converting layer,
wherein the fourth color filter layer is a same as one of the first, second, or third color filter layers.

14. The display device of claim 10 , wherein the first color filter layer is located on an upper surface of the bank layer.

15. The display device of claim 14 , wherein the first color filter layer overlaps the upper surface of the bank layer.

16. The display device of claim 10 , further comprising an inorganic insulating layer between the first color filter layer and the bank layer.

17. A method of manufacturing a display device, the method comprising:
forming a first bank layer on a non-display area of a transistor substrate comprising a driving element, and having a display area, and the non-display area surrounding the display area;
removing a portion of the first bank layer to form a second bank layer spaced apart from the display area and to define a trench;
forming a first inorganic insulating layer on the first bank layer, on the second bank layer, and on portions of the first bank layer and the second bank layer defining the trench;
forming a low refractive layer on the first inorganic insulating layer to overlap at least another portion of the first bank layer;
forming a first color filter layer on the first inorganic insulating layer and filling the trench; and
cutting between the first bank layer and the second bank layer.

18. The method of claim 17 , further comprising:
forming a second color filter layer on the first color filter layer; and
forming a third color filter layer on the second color filter layer.

19. The method of claim 17 , further comprising:
locating a light emitting element on and connected to the driving element;
locating a color converting layer on the light emitting element to overlap the light emitting element;
locating a second color filter layer on the color converting layer; and
locating a third color filter layer above the first color filter layer,
wherein the second color filter layer is deposited concurrently with one of the first or third color filter layers.

20. The method of claim 17 , wherein the first color filter layer is exposed to an outside.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Inok
• Lee Sanghun
• Kim Chansu
• Oh Keunchan
• Lee Gak Seok
• Lee Soyun
• Jang Jieun
• Jang Chang-Soon

Classifications

• H10K59/8731

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

• H10K59/873

  Encapsulations · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K71/851

  Division of substrate · CPC title