Display device including inorganic insulating layer in bending area

Patent metadata

Field	Value
Publication number	US-11836323-B2
Application number	US-202217993861-A
Country	US
Kind code	B2
Filing date	Nov 23, 2022
Priority date	Nov 28, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A display device includes (i) a substrate having a first area, a second area, and a bending area located between the first area and the second area, where the substrate is bent along a bending axis in the bending area, the substrate includes a thin portion at an edge portion of the bending area, and the thin portion extends from the second area to the first area and has a thickness less than a thickness of the substrate at a center of the bending area; and (ii) an inorganic insulating layer over the substrate, where the inorganic insulating layer exposes the thin portion in the bending area.

First claim

What is claimed is:

1. A display device comprising:
a substrate having a first area, a second area, and a bending area disposed between the first area and the second area, wherein the substrate is bent along a bending axis in the bending area, the substrate comprises a thin portion at an edge portion of the substrate in the bending area, the thin portion extends from the second area to the first area along the edge portion of the substrate, and a thickness of the substrate at the thin portion in the bending area is less than a thickness of the substrate at a center of the first area; and
an inorganic insulating layer over the substrate, wherein the inorganic insulating layer exposes the thin portion in the bending area,
wherein the thin portion defines a first groove extending from the second area to the first area, and the inorganic insulating layer has a first opening corresponding to the first groove,
wherein a width of the first groove in a direction of the bending axis is shorter than a width of the bending area in the direction of the bending axis.

2. The display device of claim 1 , wherein the width of the first groove in the direction of the bending axis is greater than a width of the first opening in the direction of the bending axis.

3. The display device of claim 1 , wherein an inner side surface of the first opening protrudes from an edge of the first groove in a direction to a center of the first opening.

4. The display device of claim 1 , wherein the substrate has a second groove between an edge of the substrate and the first groove in the bending area, the second groove extends from the second area to the first area, and the inorganic insulating layer has a second opening corresponding to the second groove in the bending area.

5. The display device of claim 4 , wherein a width of the second groove in the direction of the bending axis is greater than a width of the second opening in the direction of the bending axis.

6. The display device of claim 4 , wherein an inner side surface of the second opening protrudes from an edge of the second groove in a direction to a center of the second opening.

7. The display device of claim 4 , wherein the second groove extends nonparallel to the first groove.

8. The display device of claim 4 , wherein the first groove extends to have a linear shape, and the second groove extends to have a curved shape.

9. The display device of claim 1 , further comprising a metal layer which covers an inner side surface of the first opening.

10. The display device of claim 1 , further comprising an additional insulating layer over the inorganic insulating layer, wherein the additional insulating layer has an additional opening corresponding to the first opening in the bending area.

11. A display device comprising:
a substrate having a first area, a second area, and a bending area disposed between the first area and the second area, wherein the substrate is bent along a bending axis in the bending area, the substrate has a first groove at an edge portion of the substrate in the bending area, the first groove is a recessed part of the substrate at the edge portion of the substrate, a thickness of the substrate at the first groove is less than a thickness of the substrate at a center of the first area, and the first groove extends from the second area to the first area along the edge portion of the substrate; and
an inorganic insulating layer over the substrate, wherein part of the inorganic insulating layer on the bending area exposes the first groove in the bending area;
wherein inorganic insulating layer has a first opening corresponding to the first groove,
wherein a width of the first groove in a direction of the bending axis is shorter than a width of the bending area in the direction of the bending axis.

12. The display device of claim 11 , wherein the width of the first groove in the direction of the bending axis is greater than a width of the first opening in the direction of the bending axis.

13. The display device of claim 11 , wherein an inner side surface of the first opening protrudes from an edge of the first groove in a direction to a center of the first opening.

14. The display device of claim 11 , wherein the substrate has a second groove between an edge of the substrate and the first groove in the bending area, the second groove extends from the second area to the first area, and the inorganic insulating layer has a second opening corresponding to the second groove in the bending area.

15. The display device of claim 14 , wherein a width of the second groove in the direction of the bending axis is greater than a width of the second opening in the direction of the bending axis.

16. The display device of claim 14 , wherein an inner side surface of the second opening protrudes from an edge of the second groove in a direction to a center of the second opening.

17. The display device of claim 14 , wherein the second groove extends nonparallel to the first groove.

18. The display device of claim 14 , wherein the first groove extends to have a linear shape, and the second groove extends to have a curved shape.

19. The display device of claim 11 , further comprising a metal layer which covers an inner side surface of the first opening.

20. The display device of claim 11 , further comprising an additional insulating layer over the inorganic insulating layer, wherein the additional insulating layer has an additional opening corresponding to the first opening in the bending area.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Kyongjun
• Yun Sungsik
• Seo Juyeon
• Park Jinsuk
• Lee Jaebok
• Cho Sungho

Classifications

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/8731

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

• G06F3/0445 Primary

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• H10K59/124 Primary

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

• H10K50/80

  Constructional details · CPC title