Stretchable display device and method of manufacturing stretchable display device

Patent metadata

Field	Value
Publication number	US-10649496-B2
Application number	US-201916401274-A
Country	US
Kind code	B2
Filing date	May 2, 2019
Priority date	Aug 11, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A stretchable display device includes a substrate having a plurality of islands spaced apart from each other, and a plurality of bridges connecting each of the plurality of islands. A plurality of display units is disposed above the plurality of islands, respectively. A plurality of metal wirings are electrically connected to each of the plurality of display units. The plurality of metal wirings are disposed above the plurality of bridges. Each of the plurality of bridges includes a first region curved convexly in a first direction on a plane, and a second region curved concavely in the first direction. The second region is connected to the first region. Each of the plurality of metal wirings has a first width, and each of the plurality of bridges have a second width that is greater than the first width.

First claim

What is claimed is:

1. A method of manufacturing a stretchable display device, the method comprising:
forming an insulating layer above a carrier substrate;
forming a plurality of display units, spaced apart from each other, on the insulating layer;
forming a plurality of metal wirings on the insulating layer, electrically connected to the plurality of display units; and
patterning the insulating layer,
wherein the plurality of display units and the plurality of metal wirings are arranged above a substrate formed by patterning the insulating layer, the substrate comprising a plurality of islands above which the plurality of display units are arranged, and a plurality of bridges above which the plurality of metal wirings are arranged, each of the plurality of bridges comprising a first region curved convexly in a first direction on a plane, and a second region curved concavely in the first direction, the second region being connected to the first region, each of the plurality of metal wiring having a first width, and each of the plurality of bridges having a second width greater than the first width, and
wherein each of the plurality of display units comprises a display area and a non-display area located beyond the display area, and a dam portion formed in the non-display area.

2. The method of claim 1 , wherein the plurality of metal wirings is arranged along an outer edge having a convex shape in the first region and the second region, and is spaced apart from an inner edge having a concave shape in the first region and the second region.

3. The method of claim 2 , wherein the first width is from about 40% to about 70% of the second width.

4. The method of claim 2 , wherein each of the plurality of bridges comprises a third region connecting one end of the first region to one end of the second region above the plane, and each of the plurality of metal wirings obliquely crosses a width of a corresponding bridge of the plurality of bridges in the third region.

5. The method of claim 1 , wherein the plurality of display units and the plurality of metal wirings are formed after forming the substrate by patterning the insulating layer.

6. The method of claim 1 , wherein the substrate is formed by patterning the insulating layer after the forming of the plurality of display units and the plurality of metal wirings above the insulating layer.

7. The method of claim 1 , wherein each of the plurality of display units comprises at least one organic light-emitting diode emitting red light, blue light, green light, or white light.

8. The method of claim 7 , wherein each of the plurality of display units comprises at least one pixel, and the at least one pixel comprises an organic light-emitting diode emitting the red light, an organic light-emitting diode emitting the blue light, and an organic light-emitting diode emitting the green light.

9. The method of claim 8 , wherein the at least one pixel comprises a plurality of pixels.

10. The method of claim 7 , wherein each of the plurality of display units comprises at least one thin film transistor electrically connected to the at least one organic light-emitting diode, and the plurality of metal wirings comprise a first metal wiring and a second metal wiring each of which is electrically connected to the at least one thin film transistor.

11. The method of claim 10 , wherein the at least one thin film transistor comprises an active layer, a gate electrode, a source electrode, and a drain electrode, the first metal wiring comprises a same material as that of the gate electrode, and the second metal wiring comprises a same material as that of the source electrode and the drain electrode.

12. The method of claim 1 , further comprising:
forming a thin film encapsulation layer over the plurality of display units and thereby sealing the plurality of display units.

13. The method of claim 12 , wherein the thin film encapsulation layer is separately formed above each of the plurality of display units.

14. The method of claim 13 , further comprising:
forming a first protective film above the thin film encapsulation layer; and
removing the carrier substrate.

15. The method of claim 14 , wherein the second protective film is attached to a lower surface of the substrate from which the carrier substrate has been removed.

16. The method of claim 15 , wherein the first protective film and the second protective film comprise a stretched sheet.

17. The method of claim 14 , further comprising:
forming a functional layer above the first protective film, the functional layer comprising a polarization layer or a touchscreen layer.

18. The method of claim 1 , wherein the first set of metal wirings are formed simultaneously, and of a same material, as gate electrodes of the plurality of display units, and wherein the second set of metal wirings are formed simultaneously, and of a same material, as drain electrodes of the plurality of display units.

Assignees

• Samsung Display Co Ltd

Inventors

• Choi Jinwoo
• Jang Youngse
• Choi Haeyun
• Park Sungkook
• Lim Jaeik

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• G02F1/133351

  Manufacturing of individual cells out of a plurality of cells, e.g. by dicing · CPC title

• H05B33/22

  characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers · CPC title

• H05B33/14

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title