Stretchable display devices, methods for manufacturing the same, and electronic devices

Patent metadata

Field	Value
Publication number	US-2020006684-A1
Application number	US-201916565471-A
Country	US
Kind code	A1
Filing date	Sep 9, 2019
Priority date	Mar 14, 2018
Publication date	Jan 2, 2020
Grant date	—

Abstract

The present disclosure relates to the field of display technologies, and a stretchable display device, a method for manufacturing the same, and an electronic device are disclosed. In the present disclosure, the device includes: a stretchable substrate, a stretchable wire and a plurality of rigid islands. The stretchable wire and the plurality of rigid islands are all arranged on the stretchable substrate. The plurality of rigid islands are spaced apart on the stretchable substrate, and a pixel encapsulation body is formed on the rigid island. The stretchable wire is connected to the pixel encapsulation body to form a power supply circuit for the pixel encapsulation body. The present disclosure realizes a reliable electrical connection condition, effective encapsulation and structural stability of light-emitting pixels under stretching conditions by connecting the light-emitting pixel that is separately encapsulated on each rigid island, to one another through the stretchable wire.

First claim

1 . A stretchable display device comprising:
a stretchable substrate; a stretchable wire; and a plurality of rigid islands; wherein: the stretchable wire and the plurality of rigid islands are arranged on the stretchable substrate; the plurality of rigid islands is spaced apart from one another on the stretchable substrate; a pixel encapsulation body is formed on the rigid island; and the stretchable wire is connected to the pixel encapsulation body to form a power supply circuit for the pixel encapsulation body.

2 . The stretchable display device of claim 1 , wherein:
the pixel encapsulation body comprises a first moisture-oxygen barrier layer, a pixel unit and a second moisture-oxygen layer; the first moisture-oxygen barrier layer, the pixel unit, and the second moisture-oxygen layer are formed on the rigid island sequentially; and a sealed space is formed between the first moisture-oxygen barrier layer and the second moisture-oxygen layer, and at least a portion of the pixel unit extends out of the sealed space, and is connected to the stretchable wire.

3 . The stretchable display device of claim 2 , wherein:
the pixel unit comprises a first electrode layer, a light-emitting layer and a second electrode layer; the first electrode layer is located above the first moisture-oxygen barrier layer, and at least a portion of the first electrode layer extends out of the sealed space and is connected to the stretchable wire in a first direction on the stretchable substrate; the light-emitting layer is located between the first electrode layer and the second electrode layer, and the light-emitting layer is encapsulated in the sealed space; and the second electrode layer is located under the second moisture-oxygen barrier layer, and at least a portion of the second electrode layer extends out of the sealed space and is connected to the stretchable wire in a second direction on the stretchable substrate, wherein the first direction is perpendicular to the second direction.

4 . The stretchable display device of claim 3 , wherein:
the pixel encapsulation body further comprises a pixel defining layer defining a position at which the light-emitting layer is formed; the pixel defining layer is formed on the first electrode layer, and extends out of the first electrode layer in the second direction, until partially overlapping with the stretchable wire in the second direction; a central area of the pixel defining layer is a pixel defining area, a bottom of the pixel defining area penetrates to the first electrode layer to expose the first electrode layer, and the light-emitting layer is formed on a portion of the first electrode layer exposed out of the pixel defining area; and the second electrode layer is formed on the light-emitting layer, and extends to the stretchable wire in the second direction.

5 . The stretchable display device of claim 4 , wherein a groove surrounding the pixel defining area is formed in the pixel defining layer, and a bottom of the groove penetrates to the first electrode layer in the second direction and penetrates to the first moisture-oxygen barrier layer in the first direction.

6 . The stretchable display device of claim 4 , wherein:
an electrode contact hole is formed in the pixel defining layer, the electrode contact hole is configured to expose the stretchable wire in the second direction, and the second electrode layer is connected to the stretchable wire in the second direction through the electrode contact hole.

7 . The stretchable display device of claim 1 , wherein:
a patterned rigid layer is deposited on the stretchable substrate, and the patterned rigid layer forms the plurality of rigid islands; and an elastic modulus of the rigid layer is larger than an elastic modulus of the stretchable substrate.

8 . The stretchable display device of claim 7 , wherein the rigid layer comprises one of polyimide, silicone rubber with high elastic modulus, and polymethyl methacrylate or a combination thereof.

9 . The stretchable display device of claim 1 , wherein the stretchable wire comprises one of a metal material, a carbon nanomaterial, conductive polymer, and an ion conductor material or a combination thereof.

10 . A method for manufacturing a stretchable display device, comprising:
providing a stretchable substrate; forming a plurality of rigid islands spaced apart from one another on the stretchable substrate; and forming a stretchable wire on the stretchable substrate, and forming a pixel encapsulation body on the rigid island, wherein the stretchable wire is connected to the pixel encapsulation body to form a power supply circuit for the pixel encapsulation body.

11 . The method of claim 10 , wherein the forming the stretchable wire on the stretchable substrate, and forming the pixel encapsulation body on the rigid island further comprises:
forming the stretchable wire on the stretchable substrate; forming a first moisture-oxygen barrier layer on the rigid island; forming a pixel unit on the first moisture-oxygen barrier layer; and forming a second moisture-oxygen barrier layer on the pixel unit, wherein a sealed space is formed between the first moisture-oxygen barrier layer and the second moisture-oxygen layer, and at least a portion of the pixel unit extends out of the sealed space, and is connected to the stretchable wire.

12 . The method of claim 11 , wherein the pixel unit comprises a first electrode layer, a light-emitting layer and a second electrode layer, and the forming the pixel unit on the first moisture-oxygen barrier layer further comprises:
forming the first electrode layer on the first moisture-oxygen barrier layer, at least a portion of the first electrode layer extending out of the sealed space and being connected to the stretchable wire in a first direction on the stretchable substrate; forming the light-emitting layer on the first electrode layer, the light-emitting layer being encapsulated in the sealed space; and forming the second electrode layer on the light-emitting layer, at least a portion of the second electrode layer extending out of the sealed space and being connected to the stretchable wire in a second direction on the stretchable substrate, wherein the first direction is perpendicular to the second direction.

13 . The method of claim 12 , wherein after the forming the first moisture-oxygen barrier layer on the electrode layer, the method further comprises:
forming a pixel defining layer on the first electrode layer, wherein the pixel defining layer is configured to define a position at which the light-emitting layer is formed, and the pixel defining layer extends out of the first electrode layer in the second direction, until partially overlapping with the stretchable wire in the second direction, and wherein a central area of the pixel defining layer is a pixel defining area, a bottom of the pixel defining area penetrates to the first electrode layer to expose the first electrode layer; and forming a groove surrounding the pixel defining area in the pixel defining layer, wherein a bottom of the groove penetrates to the first electrode layer in the second direction, and penetrates to the first moisture-oxygen barrier layer in the first direction; wherein the forming the light-emitting layer on the first electrode layer comprises: forming the light-emitting layer on a portion of the first electrode layer exposed out of the pixel defining area; and wherein the forming the second electrode layer on the light-emitting layer comprises: forming the second electrode layer on the light-emitting layer located in the pixel defining area, the se

Assignees

• Kunshan New Flat Panel Display Technology Ct Co Ltd
• Kunshan Govisionox Optoelectronics Co Ltd

Inventors

• Liu Huimin
• Xing Rubo
• Wei Dong
• Wang Jiantai
• Yang Xiaolong

Classifications

• H01L51/0097 Primary

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic