# US 10,770,683 B2 · Organic EL display panel and manufacturing method thereof

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- Number: US 10,770,683 B2
- Document ID: US10770683B2
- Status: Granted
- Kind: B2
- Application number: 16/226,635
- Filed: 2018-12-20
- Published: 2019-07-11
- Granted: 2020-09-08
- Earliest claimed: 2018-01-11
- Assignees: Joled Inc.
- Applicants: Joled Inc.
- Inventors: Kenji Harada
- Web page: https://patentgrep.com/patent/US10770683B2

## CPC

- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/873: {Encapsulations}
- H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics}
- H10D 86/60: wherein the TFTs are in active matrices
- H10K 59/1201: {Manufacture or treatment}
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- H10K 2102/3026: {Top emission}
- H10K 2102/311: {Flexible OLED}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

An organic electroluminescence (EL) display panel including: a substrate; an insulating resin layer extending from an image display region to a peripheral region; an organic EL element array within the image display region; a sealing layer extending from the image display region to the peripheral region; and a sealing reinforcement layer, laminated in this order. The sealing layer includes first, second, and third sealing layers laminated in this order from the substrate, the first and third sealing layers being made of an inorganic material and the second sealing layer being made of a resin. In the outer peripheral portion of the sealing layer, the first and third sealing layers are in direct contact with each other and cover an outer end of the insulating resin layer. An outer end of the sealing reinforcement layer is outside the outer end of the insulating resin layer in plan view.

## Claims

### Claim 1

An organic electroluminescence (EL) display panel having an image display region and a peripheral region around the image display region in plan view, the organic EL display panel comprising:
a substrate;
an insulating resin layer disposed above the substrate and extending from the image display region to the peripheral region;
an organic EL element array disposed above the insulating resin layer within the image display region;
a sealing layer disposed above the organic EL element array and extending from the image display region to the peripheral region; and
a sealing reinforcement layer laminated above the sealing layer, wherein
the sealing layer includes a first sealing layer, a second sealing layer, and a third sealing layer that are laminated in this order from the substrate, the first sealing layer and the third sealing layer each being made of an inorganic material and the second sealing layer being made of a resin,
in an outer peripheral portion of the sealing layer, the first sealing layer and the third sealing layer are in direct contact with each other without the second sealing layer disposed therebetween and extend to cover an outer end of the insulating resin layer, and
an outer end of the sealing reinforcement layer is located outside the outer end of the insulating resin layer in plan view, wherein
the sealing reinforcement layer includes a sheet-like base, a joining layer through which the sheet-like base is joined to the sealing layer, and a protection member that covers an outer end of the joining layer and an outer end of the sheet-like base.

### Claim 2 (depends on 1)

The organic EL display panel of claim 1, wherein
the protection member is made of an ultraviolet-curing resin material or a thermosetting resin material.

### Claim 3 (depends on 1)

The organic EL display panel of claim 1, wherein
in plan view, outer ends of the first sealing layer and the third sealing layer coincide with the outer end of the sealing reinforcement layer.

### Claim 4

An organic electroluminescence (EL) display panel having an image display region and a peripheral region around the image display region in plan view, the organic EL display panel comprising:
a substrate;
an insulating resin layer disposed above the substrate and extending from the image display region to the peripheral region;
an organic EL element array disposed above the insulating resin layer within the image display region;
a sealing layer disposed above the organic EL element array and extending from the image display region to the peripheral region; and
a sealing reinforcement layer laminated above the sealing layer, wherein
the sealing layer includes a first sealing layer, a second sealing layer, and a third sealing layer that are laminated in this order from the substrate, the first sealing layer and the third sealing layer each being made of an inorganic material and the second sealing layer being made of a resin,
in an outer peripheral portion of the sealing layer, the first sealing layer and the third sealing layer are in direct contact with each other without the second sealing layer disposed therebetween and extend to cover an outer end of the insulating resin layer, and
an outer end of the sealing reinforcement layer is located outside the outer end of the insulating resin layer in plan view, wherein
the insulating resin layer has, in the peripheral region, a groove that surrounds the organic EL element array,
the insulating resin layer is divided into an inner insulating resin layer portion and an outer insulating resin layer portion by the groove, and
the first sealing layer covers side surfaces and a bottom of the groove and the outer insulating resin layer portion.

### Claim 5 (depends on 4)

The organic EL display panel of claim 4, wherein
the sealing reinforcement layer includes a sheet-like base and a joining layer through which the sheet-like base is joined to the sealing layer.