Stretchable display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9756723-B2
Application number	US-201514801877-A
Country	US
Kind code	B2
Filing date	Jul 17, 2015
Priority date	Jan 6, 2015
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A stretchable display includes a stretchable substrate including a flat part and a plurality of protrusions protruding above the flat part, a plurality of fixed light emitting devices, each fixed light emitting device being attached to an upper surface of a corresponding protrusion of the plurality of protrusions, a plurality of moving light emitting devices, the moving light emitting devices being positioned among the plurality of protrusions, and a plurality of connection wirings connecting among the plurality of fixed light emitting devices and the plurality of moving light emitting devices.

First claim

What is claimed is:

1. A stretchable display, comprising:
a stretchable substrate including a flat part and a plurality of protrusions protruding above the flat part;
a plurality of fixed light emitting devices, each fixed light emitting device being attached to an upper surface of a corresponding protrusion of the plurality of protrusions;
a plurality of moving light emitting devices, the moving light emitting devices being positioned among the plurality of protrusions; and
a plurality of connection wirings connecting among the plurality of fixed light emitting devices and the plurality of moving light emitting devices.

2. The stretchable display as claimed in claim 1 , wherein the moving light emitting devices include first moving light emitting devices positioned on the flat part and second moving light emitting devices positioned between respective first moving light emitting devices and fixed light emitting devices.

3. The stretchable display as claimed in claim 2 , wherein lateral sides of each protrusion are positively tapered toward an upper surface of the flat part.

4. The stretchable display of claim 3 , wherein the second moving light emitting device emits light only in a state in which the stretchable substrate is elongated.

5. The stretchable display as claimed in claim 2 , wherein lateral sides of the protrusion are reversely tapered toward an upper surface of the flat part, the second moving light emitting devices extending along respective lateral sides of the protrusions.

6. The stretchable display as claimed in claim 5 , wherein the first moving light emitting device and the second moving light emitting device are horizontal only when the stretchable substrate is elongated.

7. The stretchable display as claimed in claim 1 , wherein the moving light emitting devices emit light when the stretchable substrate is contracted.

8. The stretchable display as claimed in claim 1 , further comprising an adhesive layer between the protrusions and the fixed light emitting devices.

9. The stretchable display as claimed in claim 1 , wherein each of the fixed light emitting devices and the moving light emitting devices includes a support layer, a display layer on the support layer, and an encapsulating layer covering the display layer.

10. The stretchable display as claimed in claim 1 , wherein the connection wiring includes a metal line and a flexible polymer enclosing the metal line.

11. The stretchable display as claimed in claim 1 , wherein the stretchable substrate is stretchable in a first direction.

12. The stretchable display as claimed in claim 1 , wherein the stretchable substrate is simultaneously stretchable in a first direction and in a second direction orthogonal to the first direction.

13. The stretchable display as claimed in claim 1 , further comprising:
a stretchable cover plate positioned on the fixed light emitting device;
a stretchable touch panel on the stretchable cover plate; and
a stretchable window on the stretchable touch panel.

14. A stretchable display, comprising:
a stretchable substrate;
a plurality of fixed light emitting devices attached to the stretchable substrate;
a plurality of moving light emitting devices positioned over the stretchable substrate, while being spaced apart from the stretchable substrate; and
a plurality of connection wirings connecting the plurality of fixed light emitting devices and the plurality of moving light emitting devices.

15. The stretchable display as claimed in claim 14 , wherein at least one of the plurality of moving light emitting devices does not emit light when the stretchable substrate is contracted.

16. The stretchable display as claimed in claim 14 , further comprising:
a stretchable cover plate over the fixed light emitting device and the moving light emitting device;
a spacer positioned between each of the fixed light emitting devices and the stretchable cover plate, the spacer maintaining an interval between the fixed light emitting device and the stretchable cover plate;
a stretchable touch panel on the stretchable cover plate; and
a stretchable window on the stretchable touch panel.

17. The stretchable display as claimed in claim 14 , further comprising an adhesive layer between the stretchable substrate and the fixed light emitting device.

18. A manufacturing method of a stretchable substrate, the method comprising:
forming a plurality of light emitting devices and a plurality of connection wirings connecting therebetween on a carrier substrate;
separating the plurality of light emitting devices and the plurality of connection wirings from the carrier substrate;
forming a stretchable substrate including a plurality of protrusions protruding above a flat part of the stretchable substrate;
elongating the stretchable substrate to increase intervals among the plurality of protrusions;
attaching the plurality of light emitting devices and the plurality of connection wirings to the elongated stretchable substrate; and
contracting the stretchable substrate.

19. The method as claimed in claim 18 , wherein forming the plurality of light emitting devices includes:
attaching a plurality of fixed light emitting devices to the protrusions; and
forming a plurality of moving light emitting devices between the protrusions.

20. The method as claimed in claim 18 , further comprising:
positioning a stretchable cover plate above the light emitting devices when the stretchable substrate is in contracted state;
forming a stretchable touch panel on the stretchable cover plate; and
forming a stretchable window on the stretchable touch panel.

Assignees

• Samsung Display Co Ltd

Inventors

• Hong Jong Ho
• Joo Hye Jin
• Choi Won Il

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K1/0283 Primary

  Stretchable printed circuits · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• H05K3/305

  Affixing by adhesive · CPC title