Stretchable display

Patent metadata

Field	Value
Publication number	US-2016293571-A1
Application number	US-201615053174-A
Country	US
Kind code	A1
Filing date	Feb 25, 2016
Priority date	Apr 1, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A stretchable display is disclosed. In one aspect, the stretchable display includes a plurality of pixel substrates arranged in a matrix having row and column directions. Each of the pixel substrates includes an island and a flexible hinge connecting the island to at least one of the adjacent pixel substrates. The island of each of the pixel substrates includes a plurality of first sides and a plurality of second sides. The flexible hinge of each of the pixel substrates includes a plurality of first flexible sub-hinges respectively extending from the first sides in the row direction and a plurality of second flexible sub-hinges respectively extending from the second sides in the column direction.

First claim

What is claimed is:

1 . A stretchable display, comprising:
a plurality of pixel substrates arranged in a matrix having row and column directions, wherein each of the pixel substrates comprises an island and a flexible hinge connecting the island to at least one of the adjacent pixel substrates, wherein the island of each of the pixel substrates comprises a plurality of first sides and a plurality of second sides, wherein each of the first and second sides is not parallel to the row and column directions, and wherein the flexible hinge of each of the pixel substrates comprises:
a plurality of first flexible sub-hinges respectively extending from the first sides in the row direction; and
a plurality of second flexible sub-hinges respectively extending from the second sides in the column direction.

2 . The stretchable display of claim 1 , wherein the pixel substrate comprises:
a first island line formed over the island parallel with the second sides; and a second island line formed over the island parallel with the first sides, wherein the first island line has a first end that overlaps a corresponding one of the first sides, and the second island line has a first end that overlaps a corresponding one of the second sides.

3 . The stretchable display of claim 2 , wherein each of the first flexible sub-hinges comprises a first connecting rod parallel to the row direction and having a shape which is not bent,
wherein each of the second flexible sub-hinges comprises a second connecting rod parallel to the column direction and having a shape which is not bent, and wherein each of the pixel substrates further comprises:
a first connecting line connected to the first island line and formed on the first connecting rod; and
a second connecting line connected to the second island line and formed on the second connecting rod.

4 . The stretchable display of claim 3 , wherein each of the first flexible sub-hinges comprises a first fan-out portion interposed between the corresponding first connecting rod and the island,
wherein each of the second flexible sub-hinges comprises a second fan-out portion interposed between the corresponding second connecting rod and the island, and wherein each of the pixel substrates further comprises:
a first fan-out line connecting the first connecting line to the first island line and formed on the first fan-out part; and
a second fan-out line connecting the second connecting line to the second island line and formed on the second fan-out part.

5 . The stretchable display of claim 4 , wherein each of the first connecting rods is divided into first and second connecting areas in the column direction, and wherein the first connecting line is formed only on the first connecting area.

6 . The stretchable display of claim 5 , wherein when the stretchable display is stretched, strain in the first connecting area is less than that in the second connecting area.

7 . The stretchable display of claim 6 , wherein the second connecting area is defined between a first center line and the first connecting area, and wherein the first center line passes through a center of the island and is parallel with the row direction.

8 . The stretchable display of claim 7 , wherein the first connecting rod comprises first and second edges respectively belonging to the first and second connected areas, and wherein the first fan-out portion comprises a strain alleviating groove connected to the second edge and configured to alleviate stress in the first connecting rod.

9 . The stretchable display of claim 8 , wherein the strain alleviating groove is recessed parallel with the second side.

10 . The stretchable display of claim 5 , wherein each of the second connecting rods is divided into third and fourth connecting areas in the row direction, and wherein the second connecting line is formed only on the third connecting area.

11 . The stretchable display of claim 10 , wherein when the stretchable display is stretched, strain in the third connecting area is less than that in the fourth connecting area.

12 . The stretchable display of claim 11 , wherein the fourth connecting area is defined between a second center line and the third connecting area, and wherein the second center line passes through a center of the island and is parallel with the column direction.

13 . The stretchable display of claim 12 , wherein when the stretchable display is bent, a strain value of each of the first and third connecting area is less than about 1%.

14 . The stretchable display of claim 3 , wherein an angle formed between the first side and the first connecting rod is about 45°, and wherein an angle formed between the second side and the second connecting rod is about 225°.

15 . The stretchable display of claim 2 , further comprising at least one light emitting element formed on the island of the pixel substrate.

16 . The stretchable display of claim 15 , wherein the at least one light emitting element is connected to the first island line and the second island line.

17 . The stretchable display of claim 1 , wherein the pixel substrates comprises first and second pixel substrates alternately arranged in the row and column directions,
wherein an angle formed between a first side of the first pixel substrate and first connecting rod of each of the first flexible sub-hinges of the first pixel substrate and an angle formed between a second side of the first pixel substrate and second connecting rod of each of the second flexible sub-hinges of the first pixel substrate are defined as a first angle, and wherein an angle formed between a first side of the second pixel substrate and the first connecting rod of the first flexible sub-hinge of the second pixel substrate and an angle formed between a second side of the second pixel substrate and the second connecting rod of the second flexible sub-hinge of the second pixel substrate are defined as a second angle that is different from the first angle.

18 . The stretchable display of claim 17 , wherein the first angle is about 45°, and wherein the second angle is about 225°.

19 . The stretchable display of claim 1 , wherein the pixel substrates comprises first to third pixel substrates,
wherein the second pixel substrate and the first pixel substrate have symmetric shapes with respect to a first virtual line passing between the first and second pixel substrates parallel with the column direction, and wherein the third pixel substrate and the first pixel substrate have symmetric shapes with respect to a second virtual line passing between the first and third pixel substrates parallel with the row direction.

20 . A stretchable display, comprising:
a plurality of pixel substrates arranged in a matrix having row and column directions, wherein each of the pixel substrates comprises an island and a flexible hinge connecting the island to at least one of the adjacent pixel substrates, wherein the island of each of the pixel substrates comprises a plurality of first sides and a plurality of second sides respectively parallel to the row and column directions, and wherein the flexible hinge of each of the pixel substrates comprises:
a plurality of first flexible sub-hinges respectively extending from the first sides in the row direction; and
a plurality of second flexible sub-hinges respectively extending from the second sides in the column direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Yoon Hyoyul
• Myeong Mansik
• Kang Eunhye
• Kim Mingu
• Kim Heegon
• Park Dongjin
• Shin Jaiku
• Yun Sungsik
• Choi Sungchul
• Choi Wonil
• Hong Jongho
• Hwang Taekyoung

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H10K59/131

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

• H10K59/95

  wherein all light-emitting elements are organic, e.g. assembled OLED displays · CPC title

• H10K77/00

  Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80 · CPC title

• H10K59/90

  Assemblies of multiple devices comprising at least one organic light-emitting element · CPC title