Display device

Patent metadata

Field	Value
Publication number	US-12342684-B2
Application number	US-202217657955-A
Country	US
Kind code	B2
Filing date	Apr 5, 2022
Priority date	Apr 28, 2021
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

According to one embodiment, a display device comprising a base, a first insulating layer, a first lower electrode, a second lower electrode, a first wiring, a second insulating layer disposed on the first wiring, a first organic layer disposed on the first lower electrode, a second organic layer disposed on the second lower electrode, a first separation wall disposed on the second insulating layer, and an upper wiring disposed continuously on the first organic layer, the second organic layer, and the first separation wall, wherein the upper wiring is electrically connected to the first wiring via a contact hole that penetrates the first separation wall and the second insulating layer.

First claim

What is claimed is:

1. A display device comprising:
a base;
a first insulating layer disposed on the base;
a first lower electrode disposed on the first insulating layer;
a second lower electrode disposed on the first insulating layer, the second lower electrode being separated from the first lower electrode and being formed of the same material as the first lower electrode;
a first wiring disposed between the first lower electrode and the second lower electrode;
a second insulating layer disposed on the first wiring;
a first organic layer disposed on the first lower electrode and including a first light-emitting layer;
a second organic layer disposed on the second lower electrode and including a second light-emitting layer;
a first separation wall disposed on the second insulating layer; and
an upper wiring disposed continuously on the first organic layer, the second organic layer, and the first separation wall, wherein
the upper wiring is electrically connected to the first wiring via a contact hole that penetrates the first separation wall and the second insulating layer,
the second insulating layer includes an intersection where a first portion extending in a first direction intersects with a second portion extending in a second direction that intersects with the first direction,
the contact hole is formed on the intersection,
the first separation wall and the first wiring are superposed,
the second insulating layer covers a first edge of the first lower electrode and a second edge of the second lower electrode,
the first wiring is disposed in a lattice shape and surrounds the first lower electrode and the second lower electrode,
the first separation wall is disposed in a lattice shape and surrounds the first lower electrode and the second lower electrode, and
a width of the first separation wall is smaller than a width of the second insulating layer.

2. The display device of claim 1 , wherein inner sides of the intersection are rounded.

3. The display device of claim 1 , wherein the first wiring supplies an electric potential to the upper wiring.

4. The display device of claim 1 , wherein a sum of a height of the first organic layer and a height of the upper wiring and a sum of a height of the second organic layer and a height of the upper wiring are smaller than a height of the first separation wall.

5. The display device of claim 1 comprising:
a third insulating layer disposed on the base;
a third lower electrode disposed on the third insulating layer;
a fourth lower electrode disposed on the third insulating layer, the fourth lower electrode being separated from the third lower electrode and being formed of the same material as the third lower electrode;
a second wiring disposed between the third lower electrode and the fourth lower electrode;
a fourth insulating layer disposed on the second wiring;
a third organic layer disposed on the third lower electrode and including a third light-emitting layer;
a fourth organic layer disposed on the fourth lower electrode and including a fourth light-emitting layer;
a first upper electrode disposed on the third organic layer;
a second upper electrode disposed on the fourth organic layer; and
a second separation wall disposed on the fourth insulating layer, wherein
the second separation wall separates the third organic layer and the fourth organic layer, and separates the first upper electrode and the second upper electrode.

6. The display device of claim 5 , wherein
the first upper electrode covers the third organic layer and is separated from the second separation wall, and
the second upper electrode covers the fourth organic layer and is separated from the second separation wall.

7. The display device of claim 1 , wherein the second insulating layer is superposed on a first edge of the first lower electrode, the first wiring, and a second edge of the second lower electrode.

8. A display device comprising:
a base;
a first insulating layer disposed on the base;
a first lower electrode disposed on the first insulating layer;
a second lower electrode disposed on the first insulating layer, the second lower electrode being separated from the first lower electrode, and being formed of the same material as the first lower electrode;
a first wiring disposed between the first lower electrode and the second lower electrode;
a second insulating layer disposed on the first wiring;
a first organic layer disposed on the first lower electrode and including a first light-emitting layer;
a second organic layer disposed on the second lower electrode and including a second light-emitting layer;
a first upper electrode disposed on the first organic layer;
a second upper electrode disposed on the second organic layer; and
a separation wall disposed on the second insulating layer, wherein
the separation wall separates the first organic layer and the second organic layer, and separates the first upper electrode and the second upper electrode,
the separation wall and the first wiring are superposed,
the second insulating layer is superposed on a first edge of the first lower electrode, the first wiring, and a second edge of the second lower electrode,
the second insulating layer covers the first edge of the first lower electrode and the second edge of the second lower electrode,
the first wiring is disposed in a lattice shape and surrounds the first lower electrode and the second lower electrode,
the separation wall is disposed in a lattice shape and surrounds the first lower electrode and the second lower electrode, and
a width of the separation wall is smaller than a width of the second insulating layer.

9. The display device of claim 8 , wherein
the first organic layer is separated from the separation wall, and
the second organic layer is separated from the separation wall.

10. The display device of claim 9 , wherein
the first upper electrode is separated from the separation wall, and
the second upper electrode is separated from the separation wall.

11. The display device of claim 8 , wherein a sum of a height of the first organic layer and a height of the first upper electrode and a sum of a height of the second organic layer and a height of the second upper electrode are smaller than a height of the separation wall.

Assignees

• Japan Display Inc

Inventors

• Morita Tetsuo
• Yanagisawa Sho
• Harada Kenji
• Tabatake Hiroshi
• Takahashi Hideyuki

Classifications

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K50/813

  characterised by their shape · CPC title

• H10K50/824

  combined with auxiliary electrodes · CPC title