Stretchable display device including stretchable buffer units

Patent metadata

Field	Value
Publication number	US-11264578-B2
Application number	US-201916690916-A
Country	US
Kind code	B2
Filing date	Nov 21, 2019
Priority date	Nov 28, 2018
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A stretchable display device includes a display area having stretchable display units each including first islands on which pixels are disposed and first cut-out grooves between the first islands. A peripheral area is adjacent to the display area, the peripheral area includes stretchable peripheral units each including first lines on which driving circuits are disposed and first opening portions between the first lines. A buffer area is disposed between the display area and the peripheral area. The buffer area includes stretchable buffer units each including second islands, second cut-out grooves between the second islands, second lines connected to the second islands, and second opening portions between the second lines. Shapes of the second cut-out grooves may be different from shapes of the first cut-out grooves, and shapes of the second opening portions may be different from shapes of the first opening portions.

First claim

What is claimed is:

1. A stretchable display device, comprising:
a stretchable display area including a plurality of first islands on which a plurality of pixels are respectively disposed and a plurality of first cut-out grooves formed between the first islands;
a stretchable first peripheral area extending primarily in a first direction from the display area, the stretchable first peripheral area including a plurality of first lines on which a plurality of driving circuits are respectively disposed and a plurality of first opening portions formed between the first lines; and
a stretchable buffer area disposed between the display area and the stretchable first peripheral area, the stretchable buffer area including a plurality of second islands, a plurality of second cut-out grooves formed between the second islands, a plurality of second lines respectively connected to the second islands, and a plurality of second opening portions formed between the second lines,
wherein a shape of each of the second cut-out grooves is different from a shape of each of the first cut-out grooves; and
wherein a shape of each of the second opening portions is different from a shape of each of the first opening portions.

2. The stretchable display device of claim 1 , wherein:
each of the first cut-out grooves, each of the first opening portions, and each of the second cut-out grooves include a first end and a second end disposed across the first direction from the first end; and
a shape of the second end of each of the second cut-out grooves is different from a shape of the second end of each of the first cut-out grooves.

3. The stretchable display device of claim 2 , wherein a shape of the first end of each of the second cut-out grooves is substantially identical to a shape of the first end of each of the first cut-out grooves.

4. The stretchable display device of claim 2 , wherein the shape of the second end of each of the second cut-out grooves is substantially identical to a shape of the second end of each of the first opening portions.

5. The stretchable display device of claim 4 , wherein:
the second end of each of the first cut-out grooves has a quadrilateral shape;
the second end of each of the first opening portions has a circular shape; and
the second end of each of the second cut-out grooves has a circular shape.

6. The stretchable display device of claim 2 , wherein:
the first end and the second end of each of the first cut-out grooves have shapes that are symmetrical about the first direction; and
the first end and the second end of each of the second cut-out grooves have shapes that are asymmetrical about the first direction.

7. The stretchable display device of claim 1 , wherein:
each of the first cut-out grooves, each of the first opening portions, and each of the second opening portions include a first end and a second end disposed across the first direction from the first end; and
a shape of the first end of each of the second opening portions is different from a shape of the first end of each of the first opening portions.

8. The stretchable display device of claim 7 , wherein a shape of the second end of each of the second opening portions is substantially identical to a shape of the second end of each of the first opening portions.

9. The stretchable display device of claim 7 , wherein the shape of the first end of each of the second opening portions is substantially identical to a shape of the first end of each of the first cut-out grooves.

10. The stretchable display device of claim 1 , further comprising:
a non-stretchable second peripheral area extending primarily in a second direction perpendicular to the first direction from the first display area, the stretchable first peripheral area, and the stretchable buffer area.

11. The stretchable display device of claim 10 , wherein sizes of the first cut-out grooves and sizes of the second cut-out grooves gradually decrease closer to the non-stretchable second peripheral area.

12. The stretchable display device of claim 10 , wherein sizes of the first opening portions and sizes of the second opening portions gradually decrease closer to the non-stretchable second peripheral area.

13. The stretchable display device of claim 1 , further comprising:
a substrate including the display area, the stretchable first peripheral area, and the stretchable buffer area; a plurality of insulation layers stacked on the substrate; and
an encapsulation layer disposed on the insulation layers.

14. The stretchable display device of claim 13 , wherein the first cut-out grooves, the first opening portions, the second cut-out grooves, and the second openings are disposed in areas where the insulation layers and the substrate are penetrated.

15. The stretchable display device of claim 13 , wherein the insulation layers in the stretchable buffer area include a plurality of organic layers.

16. A stretchable display device, comprising:
a stretchable display area including a plurality of first islands on which a plurality of pixels are respectively disposed and a plurality of first bridges connecting the first islands;
a stretchable first peripheral area extending primarily in a first direction from the display area, the stretchable first peripheral area including a plurality of first lines on which a plurality of driving circuits are respectively disposed and a plurality of first connecting portions connecting the first lines; and
a stretchable buffer area disposed between the display area and the stretchable first peripheral area, the stretchable buffer area including a plurality of second islands, a plurality of second bridges connecting the second islands, a plurality of second lines respectively connected to the second islands, and a plurality of second connecting portions connecting the second lines,
wherein a shape of each of the second islands is different from a shape of each of the first islands; and
wherein a shape of each of the second lines is different from a shape of each of the first lines.

17. The stretchable display device of claim 16 , wherein a size of each of the second islands is less than a size of each of the first islands.

18. The stretchable display device of claim 16 , wherein each of the second lines includes a through hole disposed therein.

19. The stretchable display device of claim 16 , wherein a shape of each of the second connecting portions is substantially identical to a shape of each of the first connecting portions.

20. The stretchable display device of claim 16 , further comprising: a non-stretchable second peripheral area extending primarily in a second direction perpendicular to the first direction from the first display area, the stretchable first peripheral area, and the stretchable buffer area.

21. The stretchable display device of claim 20 , wherein widths of the first bridges and widths of the second bridges gradually increase closer to the non-stretchable second peripheral area.

22. The stretchable display device of claim 20 , wherein widths of the first connecting portions and widths of the second connecting portions gradually increase closer to the non-stretchable second peripheral area.

23. The stretchable display device of claim 16 , further comprising: a substrate including the display area, the stretchable first peripheral area, and the stretchable buffer area; a plurality of insulation layers stacked on the substrate; and an encapsulation layer disposed on t

Assignees

• Samsung Display Co Ltd

Inventors

• Park Gyung Soon
• Shin Jae Min
• Jeong Junki
• Joo Hyejin
• Hong Jongho

Classifications

• H10K59/80

  Constructional details · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/131 Primary

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

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title