IP Library Granted Patent US 9,972,664
Granted Patent B2
US 9,972,664 · App. 15/611,023 · Granted May 15, 2018

Organic electroluminescent display panel

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Quick Facts
Patent No.
US 9,972,664
App. No.
15/611,023
Granted
May 15, 2018
Kind
B2
Abstract

An organic EL display panel including: a substrate; pixel electrodes that are arrayed in a matrix above the substrate; first organic functional layers that are on or above the pixel electrodes in one-to-one correspondence with the pixel electrodes, the first organic functional layers spaced apart from one another; a second organic functional layer that continuously covers the first organic functional layers; and a counter electrode that opposes the pixel electrodes and covers the second organic functional layer. In the organic EL display panel, the first organic functional layers each include a hole injection layer, and the second organic functional layer has greater electric resistance than each of the first organic functional layers and has a portion extending into an absence region, the absence region being a space between adjacent ones of the first organic functional layers.

Claims (49)

1. An organic EL display panel comprising:

a substrate;

a plurality of pixel electrodes that is arrayed in a matrix above the substrate;

a plurality of first organic functional layers that is disposed above the pixel electrodes, each of the first organic functional layers overlapping each of the pixel electrodes in one-to-one correspondence, and each of the first organic functional layers being spaced apart from one another;

an absence region disposed between adjacent ones of the first organic functional layers;

a second organic functional layer that continuously covers the plurality of the first organic functional layers, and includes a portion that is disposed in the absence region and between the adjacent ones of the first organic functional layers; and

a counter electrode disposed to face towards the pixel electrodes and covers a portion of the second organic functional layer,

wherein

each of the first organic functional layers includes a hole injection layer,

the second organic functional layer has greater electric resistance than each of the first organic functional layers,

each of the first organic functional layers is a laminate including the hole injection layer and a hole transport layer,

the second organic functional layer is a laminate including organic light-emitting layers, an electron transport layer, and an electron injection layer, and

each of the organic light-emitting layers includes a portion extending into the absence region.

2. An organic EL display panel comprising:

a substrate;

a plurality of pixel electrodes that is arrayed in a matrix above the substrate;

a plurality of first organic functional layers that is disposed above the pixel electrodes, each of the first organic functional layers overlapping each of the pixel electrodes in one-to-one correspondence, and each of the first organic functional layers being spaced apart from one another;

a hole injection layer disposed between the pixel electrodes and the first organic functional layers;

an absence region disposed between adjacent ones of the first organic functional layers;

a second organic functional layer that continuously covers the plurality of the first organic functional layers, and includes a portion that is disposed in the absence region and between the adjacent ones of the first organic functional layers; and

a counter electrode disposed to face towards the pixel electrodes and covers a portion of the second organic functional layer,

wherein

each of the first organic functional layers includes a hole transport layer,

the second organic functional layer has greater electric resistance than each of the first organic functional layers,

the second organic functional layer is a laminate including organic light-emitting layers, an electron transport layer, and an electron injection layer, and

at least one of the organic light-emitting layers extends into the absence region.

3. An organic EL display panel comprising:

a substrate;

pixel electrodes that are arrayed in a matrix above the substrate;

first organic functional layers that are on or above the pixel electrodes in one-to-one correspondence with the pixel electrodes, the first organic functional layers spaced apart from one another;

a second organic functional layer that continuously covers the first organic functional layers; and

a counter electrode that opposes the pixel electrodes and covers the second organic functional layer, wherein

each of the first organic functional layers includes a hole injection layer,

the second organic functional layer has greater electric resistance than each of the first organic functional layers and has a portion extending into an absence region, the absence region being a space between adjacent ones of the first organic functional layers,

each of the first organic functional layers is a laminate including the hole injection layer and a hole transport layer,

the second organic functional layer is a laminate including organic light-emitting layers, an electron transport layer, and an electron injection layer, and

each of the organic light-emitting layers extends into the absence region.

4. An organic EL display panel comprising:

a substrate;

pixel electrodes that are arrayed in a matrix above the substrate;

first organic functional layers that are on or above the pixel electrodes in one-to-one correspondence with the pixel electrodes, the first organic functional layers spaced apart from one another;

a second organic functional layer that continuously covers the first organic functional layers;

a counter electrode that opposes the pixel electrodes and covers the second organic functional layer; and

a hole injection layer between the pixel electrodes and the first organic functional layers,

wherein

each of the first organic functional layers includes a hole transport layer,

the second organic functional layer has greater electric resistance than each of the first organic functional layers and has a portion extending into an absence region, the absence region being a space between adjacent ones of the first organic functional layers,

the second organic functional layer is a laminate including organic light-emitting layers, an electron transport layer, and an electron injection layer, and

at least one of the organic light-emitting layers extends into the absence region.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2025
From: JDI DESIGN AND DEVELOPMENT G.K.
To: MAGNOLIA BLUE CORPORATION
Reel/Frame 072039/0656 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 31, 2024
From: JOLED, INC.
To: JDI DESIGN AND DEVELOPMENT G.K.
Reel/Frame 066382/0619 →
CORRECTION BY AFFIDAVIT FILED AGAINST REEL/FRAME 063396/0671 Recorded Jun 12, 2023
From: JOLED, INC.
To: JOLED, INC.
Reel/Frame 064067/0723 →
SECURITY INTEREST Recorded Apr 20, 2023
From: JOLED, INC.
To: INCJ, LTD.
Reel/Frame 063396/0671 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 1, 2017
From: YAMAGUCHI, JUN; ANDO, MAKOTO
To: JOLED INC.
Reel/Frame 042565/0491 →