# US 10,319,799 B2 · Flexible display device including bent flexible substrate and bent circuit layer

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- Number: US 10,319,799 B2
- Document ID: US10319799B2
- Status: Granted
- Kind: B2
- Application number: 15/347,030
- Filed: 2016-11-09
- Published: 2017-05-25
- Granted: 2019-06-11
- Earliest claimed: 2015-11-20
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Takuma Nishinohara
- Web page: https://patentgrep.com/patent/US10319799B2

## CPC

- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/1213: {the pixel elements being TFTs}
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 77/111: {Flexible substrates}
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A display device includes a substrate that is formed of a plurality of layers stacked together and a circuit layer. A circuit layer includes a display element area in which a plurality of pixel electrodes corresponding to a plurality of unit pixels and a self-luminous element layer are provided, and a peripheral area that has a wiring to the display element area and a terminal and is at least partially bent. The substrate includes a first area that overlaps the display element area of the circuit layer and a second area that overlaps the peripheral area and is at least partially bent. The layers include at least one inorganic layer and a plurality of organic layers. The number of the organic layers in the first area is greater than the number of the organic layers in the second area.

## Claims

### Claim 1

A display device comprising:
a substrate that is formed of a plurality of layers stacked together, the plurality of layers including a first organic insulation layer, a first inorganic insulation layer on the first organic insulation layer, a second organic insulation layer on the first inorganic insulation layer, and a second inorganic insulation layer on the second organic insulation layer;
a circuit layer that is stacked on the second inorganic insulation layer so as to include a circuit of a plurality of unit pixels forming an image, the circuit layer including a semiconductor layer in contact with the second inorganic insulation layer; and
a sealing layer that covers and seals the circuit layer, wherein
the circuit layer includes a display element area in which a plurality of pixel electrodes corresponding to the unit pixels and a self-luminous element layer are provided, and a peripheral area that has a wiring to the display element area and a terminal and is at least partially bent,
the substrate includes a first area that overlaps the display element area of the circuit layer and a second area that overlaps the peripheral area and is at least partially bent,
the first inorganic insulation layer has a bottom surface adhered to the first organic insulation layer in the first area and the second area, and
the first inorganic insulation layer has a top surface adhered to the second organic insulation layer in the first area but not in the second area.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the first inorganic insulation layer and the second inorganic insulation layer are in contact with each other in the second area so that the second inorganic insulation layer covers a side portion of the second organic layer.