Display device and electronic device including the same

Patent metadata

Field	Value
Publication number	US-2026026248-A1
Application number	US-202519064027-A
Country	US
Kind code	A1
Filing date	Feb 26, 2025
Priority date	Jul 22, 2024
Publication date	Jan 22, 2026
Grant date	—

Abstract

A display device may include an anode disposed on a substrate, a pixel defining layer provided with an opening exposing the anode, an upper surface of the pixel defining layer including a first high point, a second high point, and a low point therebetween, the first high point and the second high point being higher than the low point, and the low point corresponding to a lowest portion of the upper surface of the pixel defining layer between the first high point and the second high point, a first layer disposed on an upper surface of the anode, wherein the first high point overlaps an upper surface of the first layer, a light emitting layer disposed in the opening of the pixel defining layer, a cathode disposed on the light emitting layer and the pixel defining layer, and a light blocking area disposed on the pixel defining layer and overlapping the low point of the pixel defining layer.

First claim

What is claimed is:

1 . A display device comprising:
a substrate; an anode disposed on the substrate; a pixel defining layer provided with an opening exposing the anode, wherein an upper surface of the pixel defining layer includes a first high point, a second high point, and a low point therebetween, wherein the first high point and the second high point are higher than the low point; a first layer disposed on an upper surface of the anode, wherein the first high point overlaps an upper surface of the first layer; a light emitting layer disposed in the opening of the pixel defining layer; a cathode disposed on the light emitting layer and the pixel defining layer; and a light blocking area disposed on the pixel defining layer and overlapping the low point of the pixel defining layer.

2 . The display device of claim 1 ,
wherein at least a portion of the first layer is spaced apart from the light blocking area when viewed in a plan view.

3 . The display device of claim 1 ,
wherein the low point is disposed at least 1 micrometer from an inner edge of the light blocking area toward the second high point when viewed in a plan view.

4 . The display device of claim 1 , further comprising:
a spacer spaced apart from a sidewall of the anode, wherein the second high point overlaps an upper surface of the spacer, and wherein the spacer and the first layer are formed of the same material.

5 . The display device of claim 4 ,
wherein the spacer and the first layer are disposed below the upper surface of the pixel defining layer.

6 . The display device of claim 1 ,
wherein the light blocking area includes a light blocking opening, wherein the first layer is formed of a closed loop with a first thickness when viewed in a plan view, and wherein the opening, the closed loop of the first layer, and the light blocking opening are concentrically aligned when viewed in the plan view with the first layer surrounding the opening, and the light blocking opening surrounding the first layer.

7 . The display device of claim 1 , further comprising:
a red pixel, a green pixel, and a blue pixel disposed on the substrate, wherein the first layer overlaps at least one of the red pixel, the green pixel, and the blue pixel.

8 . The display device of claim 1 ,
wherein the light blocking area includes a light blocking layer including a light blocking material.

9 . The display device of claim 1 ,
wherein the light blocking area corresponds to a region where at least two color filters of different colors overlap.

10 . The display device of claim 1 ,
wherein the low point corresponds to a lowest portion of the upper surface of the pixel defining layer between the first high point and the second high point.

11 . A display device comprising:
a substrate; an anode disposed on the substrate; a protective layer disposed on the anode; a pixel defining layer overlapping the anode and provided with a first opening exposing the anode and a second opening exposing the protective layer; a light emitting layer disposed within the first opening; a cathode disposed on the light emitting layer and the pixel defining layer; and a light blocking area disposed on the pixel defining layer and overlapping an exposed portion of the protective layer by the second opening.

12 . The display device of claim 11 ,
wherein the light blocking area includes a light blocking opening, wherein the second opening is formed of a closed loop with a first thickness when viewed in a plan view, and wherein the first opening, the light blocking opening, and the closed loop of the second opening are concentrically arranged when viewed in the plan view, with the light blocking opening surrounding the first opening, and the closed loop of the second opening surrounding the light blocking opening.

13 . The display device of claim 11 , further comprising:
a red pixel, a green pixel, and a blue pixel disposed on the substrate, wherein the exposed portion of the protective layer overlaps at least one of the red pixel, the green pixel, and the blue pixel.

14 . The display device of claim 11 ,
wherein the light blocking area corresponds to a region where at least two color filters of different colors overlap.

15 . An electronic device, comprising:
a processor; a memory having stored application programs for execution by the processor; a display device comprising: a substrate; a first insulating layer disposed on the substrate; a second insulating layer disposed on the substrate and provided with an opening exposing the first insulating layer; an anode including a first portion disposed on an upper surface of the second insulating layer and a second portion disposed in the opening of the second insulating layer; a pixel defining layer provided with a first opening exposing the first portion of the anode and disposed on the second portion of the anode, wherein an upper surface of the pixel defining layer includes a first high point, a second high point, and a low point disposed therebetween; a light emitting layer disposed within the first opening of the pixel defining layer; a cathode disposed on the light emitting layer and the pixel defining layer; and a light blocking area disposed on the pixel defining layer and overlapping the low point of the pixel defining layer.

16 . The electronic device of claim 15 ,
wherein the low point is disposed at least 1 micrometer from an inner edge of the light blocking area toward the second high point when viewed in a plan view.

17 . The electronic device of claim 15 ,
wherein the light blocking area includes a light blocking opening, wherein the low point is formed of a closed loop when viewed in a plan view, and wherein the first opening, the light blocking opening, and the closed loop of the second high point are concentrically arranged when viewed in the plan view, with the light blocking opening surrounding the first opening, and the closed loop of the second high point surrounding the light blocking opening.

18 . The electronic device of claim 15 , further comprising:
a red pixel, a green pixel, and a blue pixel disposed on the substrate, wherein the opening of the second insulating layer and the low point overlap at least one of the red pixel, the green pixel, and the blue pixel.

19 . The electronic device of claim 15 ,
wherein the light blocking area corresponds to a region where at least two color filters of different colors overlap.

20 . The electronic device of claim 15 ,
wherein the low point corresponds to a lowest portion of the upper surface of the pixel defining layer between the first high point and the second high point.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jun Hee
• Choi Yechan
• Kim Changwook
• Back Changhyun
• Ann Minjung

Classifications

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/8052

  Cathodes · CPC title

• H10K59/8051

  Anodes · CPC title

• H10K59/873

  Encapsulations · CPC title