公开(公告)号：US20250063913A1

公开(公告)日：2025-02-20

申请号：US18938475

申请日：2024-11-06

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H10K59/131 ,  G06F3/041 ,  G06F3/044 ,  H01L23/532 ,  H10K50/844 ,  H10K59/40

Abstract: A display device includes a substrate, a circuit element layer on the substrate, a display element layer on the circuit element layer, a sealing film on the display element layer, an oxide film on the sealing film, a barrier metal layer on the oxide film, and a wiring layer on the barrier metal layer, wherein a surface of the sealing film in contact with the oxide film has concave/convexities, and the barrier metal layer is formed by titanium nitride. A height of the concave/convexities of the surface of the sealing film may be less than 30 nm. A thickness of the oxide film may be 5 nm or less.

公开(公告)号：US20240215279A1

公开(公告)日：2024-06-27

申请号：US18391722

申请日：2023-12-21

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H10K50/11 ,  H10K50/16 ,  H10K50/165

CPC classification number: H10K50/11 ,  H10K50/165 ,  H10K50/166

Abstract: According to one embodiment, a display device has such configuration that an electron transport layer includes a high-concentration layer and a low-concentration layer, the high-concentration layer is adjacent to an interface with the electron injection layer, the concentration of Liq contained in the high-concentration layer is 70% or more and 90% or less, the concentration of Liq contained in the low-concentration layer is 10% or more and 50% or less, and the thickness of the high-concentration layer is 5% or more and 15% or less of the thickness of the electron transport layer.

公开(公告)号：US20230209850A1

公开(公告)日：2023-06-29

申请号：US18086643

申请日：2022-12-22

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI ,  Takuya NAKAGAWA ,  Ryosuke MURATA ,  Masakazu GUNJI ,  Takahiro USHIKUBO ,  Masashi TSUBUKU

IPC: H10K50/11

CPC classification number: H01L51/5004 ,  H01L2251/558

Abstract: According to one embodiment, a display device includes an anode, an organic EL element layer including a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer and an electron injection layer, and a cathode, wherein ΔE2_LUMO is defined as a potential barrier between the electron transport layer and the hole blocking layer, and the light-emitting layer, ΔE2_HOMO is defined as a potential barrier between the hole transport layer and the electron blocking layer, and the light-emitting layer, and each of ΔE2_LUMO and ΔE2_HOMO is 0.1 eV or higher and 0.5 eV or less.

公开(公告)号：US20250126969A1

公开(公告)日：2025-04-17

申请号：US18910109

申请日：2024-10-09

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H10K50/18 ,  H10K101/10 ,  H10K101/20

Abstract: Disclosed is a light-emitting element including an anode, a cathode, and an electroluminescence layer between the anode and the cathode. The electroluminescence layer includes: an electron-blocking layer; a buffer layer over the electron-blocking layer; and an emission layer located over the buffer layer and containing a host material and a first emission material exhibiting thermally activated delayed fluorescence. The buffer layer contains the host material. The emission layer may further include a second emission material. An energy level of a singlet excited state of the second emission material is lower than an energy level of a singlet excited state of the first emission material.

公开(公告)号：US20250048880A1

公开(公告)日：2025-02-06

申请号：US18775347

申请日：2024-07-17

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H10K59/70 ,  H10K59/12 ,  H10K59/35

Abstract: The display device includes at least one pixel having a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel and the second sub-pixel respectively include red-emissive and green-emissive organic electroluminescence elements. The third sub-pixel includes a blue-emissive inorganic electroluminescence element. Each of the organic electroluminescence elements includes an anode, a cathode, and an organic electroluminescence layer between the anode and the cathode. The inorganic electroluminescence element includes an anode, a cathode, and an inorganic electroluminescence layer electrically connected to the anode and the cathode.

公开(公告)号：US20250126961A1

公开(公告)日：2025-04-17

申请号：US18910107

申请日：2024-10-09

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H10K50/11 ,  H10K50/18 ,  H10K101/20 ,  H10K101/40

Abstract: Disclosed is a light-emitting element including an anode, a cathode, and an electroluminescence layer between the anode and the cathode. The electroluminescence layer includes an electron-blocking layer and an emission layer. The electron-blocking layer contains an electron-blocking material. The emission layer is located over and in contact with the electron-blocking layer and contains a host material and a first emission material exhibiting thermally activated delayed fluorescence. The light-emitting element is configured so that a resistance is equal to or greater than 101.0% and equal to or less than 104.0% of a resistance in a case where the electron-blocking material is replaced with the host material. The resistance is a resistance between the anode and the cathode when a current flows at a constant current density between the anode and the cathode.

公开(公告)号：US20240215293A1

公开(公告)日：2024-06-27

申请号：US18391719

申请日：2023-12-21

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H10K50/15 ,  H10K59/35 ,  H10K71/10

CPC classification number: H10K50/156 ,  H10K59/35 ,  H10K71/10

Abstract: According to one embodiment, a display device includes a first anode, a cathode opposing the first anode and a first organic layer located between the first anode and the cathode, and the first organic layer includes a first light emitting layer and a hole transport layer located between the first anode and the first light emitting layer, and an average particle diameter per unit area of a material which constitutes the first light emitting layer is smaller than an average particle diameter per unit area of a material which constitutes the hole transport layer.

公开(公告)号：US20230157051A1

公开(公告)日：2023-05-18

申请号：US17987861

申请日：2022-11-16

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H01L51/52 ,  H01L51/50

CPC classification number: H01L51/5225 ,  H01L51/5072 ,  H01L2251/558

Abstract: According to one embodiment, in a display device, end portions of a hole-transport layer, a light emitting layer and an electron-transport layer provided in a pixel are spaced apart from end portions of applicable layers of an adjacent pixel. The electron-transport layer includes a first area and a second area having a film thickness greater than that of the first area. The second area overlaps a common electrode, and the first area does not overlap the common electrode.

公开(公告)号：US20200227507A1

公开(公告)日：2020-07-16

申请号：US16737127

申请日：2020-01-08

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H01L27/32 ,  H01L51/00 ,  H01L51/56 ,  G06F1/16

Abstract: A display device includes a flexible substrate, a display portion provided on a first surface of the flexible substrate and including a plurality of pixels, a first penetrating wiring located to penetrate the flexible substrate, and a second penetrating wiring located to penetrate the flexible substrate at a position farther from the display portion than the first penetrating wiring. The flexible substrate includes a curved portion between the first penetrating wiring and the second penetrating wiring. The first penetrating wiring and the second penetrating wiring are electrically connected with each other without being extended on the curved portion.

公开(公告)号：US20200219961A1

公开(公告)日：2020-07-09

申请号：US16735869

申请日：2020-01-07

Applicant: Japan Display Inc.

Inventor： Nobuto MANAGAKI

IPC: H01L27/32 ,  H01L23/48 ,  H01L51/00 ,  H01L25/18 ,  H01L23/498 ,  H01L21/768 ,  H01L25/00

Abstract: A display device according to an embodiment of the present invention includes: a substrate that includes a display region and a peripheral region; a display element that is provided on the display region of the substrate; and an electronic component that is provided in the peripheral region on an opposite surface from a surface of the substrate on which the display element is provided, wherein the substrate includes one or more through holes in the peripheral region, the one or more through holes include a through electrode formed by a laminate structure of a plurality of conductive layers, and the through electrodes electrically connect the display element to the electronic component.