# US 2024/0204142 A1 · Display device

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- Number: US 2024/0204142 A1
- Document ID: US20240204142A1
- Status: Published application
- Kind: A1
- Application number: 18/223,050
- Filed: 2023-07-18
- Published: 2024-06-20
- Earliest claimed: 2022-12-16
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: JUNGSUN PARK; HYE JIN GWARK; JAEIK KIM; HWI KIM; DUCKJUNG LEE; YEONHWA LEE; JOONGU LEE
- Web page: https://patentgrep.com/patent/US20240204142A1

## CPC

- H10H 20/833: Transparent materials
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10W 90/00: Package configurations
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

A display device includes a substrate, a transistor disposed on the substrate, a power electrode disposed on the substrate, a pixel electrode disposed on the transistor, a light emitting layer disposed on each of the pixel electrode and the power electrode, and a common electrode disposed on the light emitting layer. The power electrode includes a stem part extending in a first direction and at least one first branch part protruding from the stem part in a second direction crossing the first direction in a plan view. The first branch part has a shape in which a width decreases as a distance from the stem part increases in a plan view.

## Claims

### Claim 1

A display device comprising:
a substrate;
a transistor disposed on the substrate;
a power electrode disposed on the substrate;
a pixel electrode disposed on the transistor;
a light emitting layer disposed on each of the pixel electrode and the power electrode; and
a common electrode disposed on the light emitting layer,
wherein the power electrode includes a stem part extending in a first direction and at least one first branch part protruding from the stem part in a second direction crossing the first direction in a plan view, and
wherein the first branch part has a shape in which a width decreases as a distance from the stem part increases in a plan view.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the power electrode further includes at least one second branch part protruding from the stem part in a third direction opposite to the second direction in a plan view.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the first branch part and the second branch part are symmetrical to each other with respect to the stem part in a plan view.

### Claim 4 (depends on 2)

The display device of claim 2, wherein the first branch part and the second branch part are asymmetrical to each other with respect to the stem part in a plan view.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the power electrode includes:
a first electrode layer;
a second electrode layer disposed on the first electrode layer; and
a third electrode layer disposed on the second electrode layer,
wherein a side surface of the first electrode layer protrudes from a side surface of the second electrode layer.

### Claim 6 (depends on 5)

The display device of claim 5, wherein a side surface of the third electrode layer protrudes from the side surface of the second electrode layer.

### Claim 7 (depends on 5)

The display device of claim 5, wherein the side surface of the second electrode layer forms an angle of about 10 degrees or more and about 150 degrees or less with respect to an upper surface of the first electrode layer in a cross-sectional view.

### Claim 8 (depends on 5)

The display device of claim 5, wherein the light emitting layer includes:
a first light emitting layer disposed on the pixel electrode; and
a second light emitting layer disposed on the power electrode and spaced apart from the first light emitting layer, and
wherein the first light emitting layer contacts the side surface of the second electrode layer.

### Claim 9 (depends on 8)

The display device of claim 8, wherein the common electrode includes:
a first common electrode disposed on the first light emitting layer and covering the first light emitting layer; and
a second common electrode disposed on the power electrode and spaced apart from the first common electrode, and
wherein the first common electrode contacts the side surface of the second electrode layer.

### Claim 10 (depends on 5)

The display device of claim 5, wherein the power electrode further includes:
at least one fourth electrode layer disposed on the third electrode layer; and
at least one fifth electrode layer disposed on the fourth electrode layer, and
wherein a side surface of the third electrode layer protrudes from a side surface of the fourth electrode layer.

### Claim 11 (depends on 5)

The display device of claim 5, wherein at least one of the first, second and third electrode layers includes a metal.

### Claim 12 (depends on 5)

The display device of claim 5, wherein at least one of the first, second and third electrode layers includes a transparent conductive oxide.

### Claim 13 (depends on 5)

The display device of claim 5, wherein at least one of the first, second and third electrode layers includes an organic material.

### Claim 14 (depends on 1)

The display device of claim 1, wherein a ratio of a length of the power electrode in the first direction to a length of the power electrode in the second direction in a plan view is about 1:20 to about 20:1.

### Claim 15

A display device comprising:
a substrate;
a transistor disposed on the substrate;
a power electrode disposed on the substrate;
a pixel electrode disposed on the transistor;
a light emitting layer disposed on each of the pixel electrode and the power electrode; and
a common electrode disposed on the light emitting layer,
wherein the power electrode includes a stem part extending in a first direction and a branch part protruding from the stem part in a plan view, and
wherein the branch part includes at least one first branch part protruding in a second direction crossing the first direction and at least one second branch part protruding in a third direction crossing at least one of the first direction and the second direction.

### Claim 16 (depends on 15)

The display device of claim 15, wherein the power electrode includes:
a first electrode layer;
a second electrode layer disposed on the first electrode layer; and
a third electrode layer disposed on the second electrode layer, and
wherein a side surface of the first electrode layer protrudes from a side surface of the second electrode layer.

### Claim 17 (depends on 16)

The display device of claim 16, wherein a side surface of the third electrode layer protrudes from the side surface of the second electrode layer.

### Claim 18 (depends on 16)

The display device of claim 16, wherein the side surface of the second electrode layer forms an angle of about 10 degrees or more and about 150 degrees or less with respect to an upper surface of the first electrode layer in a cross-sectional view.

### Claim 19 (depends on 16)

The display device of claim 16, wherein the light emitting layer includes:
a first light emitting layer disposed on the pixel electrode; and
a second light emitting layer disposed on the power electrode and spaced apart from the first light emitting layer, and
wherein the first light emitting layer contacts the side surface of the second electrode layer.

### Claim 20 (depends on 19)

The display device of claim 19, wherein the common electrode includes:
a first common electrode disposed on the first light emitting layer and covering the first light emitting layer; and
a second common electrode disposed on the power electrode and spaced apart from the first common electrode, and
wherein the first common electrode contacts the side surface of the second electrode layer.