Stretchable display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016240802-A1
Application number	US-201614990017-A
Country	US
Kind code	A1
Filing date	Jan 7, 2016
Priority date	Feb 17, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

A stretchable display device includes a stretchable substrate capable of being expanded or contracted in a first direction and pixel portions on the stretchable substrate. The pixel portions include rigid areas provided with a light emitter to selectively emit light depending on a driving signal and elastic areas surrounding the rigid areas. The pixel portions are continuously adjacent to each other in the first direction to form a plurality of pixel lines. The pixel portions included in a first pixel line and a second pixel line that are adjacent in the second direction are arranged in a zigzag form along the first direction.

First claim

What is claimed is:

1 . A stretchable display device, comprising:
a stretchable substrate to be expanded or contracted along a first direction; and pixel portions on the stretchable substrate, each pixel portion including a rigid area, a light emitter to selectively emit light depending on a driving signal on the rigid area, and an elastic area surrounding the rigid area and being stretchable in the first direction, wherein a plurality of the pixel portions are continuously adjacent to each other in the first direction to form a plurality of pixel lines, and the pixel portions included in a first pixel line and a second pixel line that are adjacent in a second direction crossing the first direction, are arranged in a zigzag form along the first direction in an initial state.

2 . The stretchable display device as claimed in claim 1 , wherein the first pixel line is an n-th pixel row and the second pixel line is an n+1-th pixel row.

3 . The stretchable display device as claimed in claim 2 , wherein an interval between the center of the pixel portions of the n-th pixel row and the center of the pixel portions of the n+1-th pixel row in the first direction is half of that between the centers of adjacent pixel portions of the n-th pixel row in the first direction.

4 . The stretchable display device as claimed in claim 2 , wherein the pixel portions in the n+1-th pixel row are disposed to be moved by a half interval of a maximum width of the n+1-th pixel portion in the first direction from respective pixel portions included in the n-th pixel row in the first direction.

5 . The stretchable display device as claimed in claim 1 , wherein the stretchable substrate includes a stretchable pattern layer having a serpentine pattern.

6 . The stretchable display device as claimed in claim 5 , wherein the serpentine pattern extends in the first direction while moving back and forth in the second direction.

7 . The stretchable display device as claimed in claim 1 , wherein an area of the stretchable substrate corresponding to the elastic area of the pixel portion is made of an elastic material.

8 . The stretchable display device as claimed in claim 1 , wherein the stretchable substrate is made of a polydimethylsiloxane (PDMS) material.

9 . The stretchable display device as claimed in claim 1 , further comprising a first wire that extends in the first direction while being around boundaries of the rigid areas of the pixel portions.

10 . The stretchable display device as claimed in claim 9 , wherein the first wire alternately winds along the rigid areas of the pixel portions of the first pixel line and the rigid areas of the pixel portions of the second pixel line.

11 . The stretchable display device as claimed in claim 1 , further comprising a second wire that extends in the second direction while being around along boundaries of the rigid areas of the pixel portions.

12 . The stretchable display device as claimed in claim 1 , wherein the rigid area of each pixel portion has a circular planar shape.

13 . The stretchable display device as claimed in claim 1 , wherein the rigid area is made of a rigid material.

14 . The stretchable display device as claimed in claim 1 , wherein the elastic area is made of an elastic material.

15 . The stretchable display device as claimed in claim 1 , wherein:
the pixel portion includes a thin film transistor in the rigid area, a first wire that extends in the first direction and is connected to a gate electrode of the thin film transistor, and a second wire that extends in the second direction and is connected to a source electrode of the thin film transistor.

16 . The stretchable display device as claimed in claim 1 , wherein the pixel portion has a rhomboidal planar shape.

17 . The stretchable display device as claimed in claim 16 , wherein:
the first pixel line is an n-th pixel row, the second pixel line is an n+1-th pixel row, and the pixel portions included in the n+1-th pixel row are respectively disposed to be moved by half of a diagonal length of the n+1-th pixel portion in the first direction from respective pixel portions included in the n-th pixel row.

18 . The stretchable display device as claimed in claim 1 , wherein the pixel portion has a hexagonal planar shape.

19 . The stretchable display device as claimed in claim 1 , wherein the pixel portion includes light emitters that respectively emit red, green, and blue light.

20 . The stretchable display device as claimed in claim 18 , wherein respective subpixels have a rectangular planar shape and are adjacent to each other in the first direction.

21 . The stretchable display device as claimed in claim 1 , wherein the subpixel includes light emitters that respectively emit red, green, blue, and white light.

22 . The stretchable display device as claimed in claim 21 , wherein the subpixel divides the light emitter in four portions.

23 . The stretchable display device as claimed in claim 1 , wherein the first pixel line is an m-th pixel column and the second pixel line is an m+1-th pixel column.

24 . A method of manufacturing a stretchable display device, the method comprising:
preparing a stretchable substrate; forming rigid areas on the stretchable substrate; forming a first wire extending in a first direction and around boundaries of the rigid areas; and forming a second wire extending in a second direction crossing the first direction on the rigid areas.

25 . The method as claimed in claim 24 , wherein preparing the stretchable substrate includes forming the stretchable pattern layer to have a serpentine pattern extending in the first direction while moving back and forth in the second direction on the stretchable substrate.

26 . The method as claimed in claim 24 , wherein preparing the stretchable substrate includes patterning the stretchable pattern layer by molding.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Soo Yeon

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/351 Primary

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title

• H01L51/0097 Primary

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic