Stretchable display panel and stretchable display device including the same

Patent metadata

Field	Value
Publication number	US-11275408-B2
Application number	US-201916709776-A
Country	US
Kind code	B2
Filing date	Dec 10, 2019
Priority date	Dec 21, 2018
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A display device includes a lower substrate that includes a first substrate, and a plurality of second substrates on the first substrate. The plurality of second substrates have higher rigidity than a rigidity of the first substrate. The plurality of second substrates may be spaced apart from each other. The lower substrate also includes one or more light emitting elements disposed on each of the plurality of second substrates.

First claim

What is claimed:

1. A stretchable display device comprising:
a lower substrate including:
a first substrate, and
a plurality of second substrates on the first substrate, the plurality of second substrates having higher rigidity than a rigidity of the first substrate, the plurality of second substrates spaced apart from each other; and

one or more light emitting elements disposed on each of the plurality of second substrates, and
a plurality of insulating layers disposed below the one or more light emitting elements of a corresponding second substrate, the plurality of insulating layers spaced apart from each other.

2. The stretchable display device of claim 1 , wherein an elastic modulus of the plurality of second substrates is higher than an elastic modulus of the first substrate.

3. The stretchable display device of claim 1 , wherein the first substrate is made from at least one of polydimethylsiloxane (PDMS), or polyurethane (PU).

4. The stretchable display device of claim 1 , wherein the plurality of second substrates is made from at least one of polyimide (PI), polyacrylate, or polyacetate.

5. The stretchable display device of claim 1 , further comprising a first connecting line on the lower substrate, the first connecting line extending between a pair of second substrates arranged along a first direction.

6. The stretchable display device of claim 5 , further comprising a second connecting line on the lower substrate, the second connecting line extending between another pair of second substrates arranged along a second direction intersecting the first direction.

7. The stretchable display device of claim 5 , wherein the first connecting line is at least one of a gate line driven by a gate driving circuit, a data line driving by a data driving circuit, a high-potential power line, or a reference voltage line of the stretchable display device.

8. The stretchable display device of claim 5 , wherein the first connecting line includes:
a first part extending in the first direction; and
a second part extending along a side surface of a second substrate that adjoins the first part.

9. The stretchable display device of claim 5 , further comprising:
a pad on a second substrate of the pair of second substrates;
another pad on the remaining second substrate of the pair of second substrates, and
wherein the first connecting line extends along a side surface of the second substrate to contact the pad, and extends along a side surface of the other second substrate to contact the another pad.

10. The stretchable display device of claim 5 , wherein the first connecting line is made of a base polymer including conductive particles.

11. The stretchable display device of claim 1 , further comprising one or more suppression patterns on the first substrate, the one or more suppression patterns disposed in spaces between the plurality of second substrates.

12. The stretchable display device of claim 11 , wherein the one or more suppression patterns have higher rigidity than the rigidity of the first substrate.

13. The stretchable display device of claim 12 , wherein a suppression pattern in the one or more suppression patterns includes a first rigid portion and a second rigid portion on the first rigid portion, the second portion having higher rigidity than a rigidity of the first rigid portion.

14. The stretchable display device of claim 11 ,
wherein a size of each of the one or more suppression patterns is smaller than the size of each of the plurality of second substrates.

15. The stretchable display device of claim 11 , further comprising:
metal patterns disposed on the one or more suppression patterns.

16. The stretchable display device of claim 15 ,
wherein the metal patterns are etch stoppers of the one or more suppression patterns.

17. The stretchable display device of claim 11 ,
wherein the one or more suppression patterns are made of a material having a higher modulus than the first substrate.

18. The stretchable display device of claim 11 ,
wherein a plurality of pixel areas including a rigid area where at least one of the second substrate is disposed and a flexible area surrounding the rigid area is defined on the first substrate, and
the one or more suppression pattern is disposed in a boundary area of the pixel areas.

19. The stretchable display device of claim 18 ,
wherein the one or more suppression patterns are disposed at corners of each of the plurality of pixel areas.

20. The stretchable display device of claim 1 , further comprising one or more transistors on each of the plurality of second substrates.

21. The stretchable display device of claim 1 , further comprising an additional insulating layer disposed on the one or more light emitting elements of a corresponding second substrate, wherein the additional insulating layer does not contact the first substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Ahn Jiyoung
• Kim Seulki

Classifications

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• G06F1/1626

  with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs] · CPC title

• G09F9/301 Primary

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

• G06F1/1652 Primary

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title