# US 12,193,257 B2 · Display device

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- Number: US 12,193,257 B2
- Document ID: US12193257B2
- Status: Granted
- Kind: B2
- Application number: 17/560,966
- Filed: 2021-12-23
- Published: 2022-11-03
- Granted: 2025-01-07
- Earliest claimed: 2021-04-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Hyeon Woo Shin; Beom Yeol Park; Ji Ryun Park; Ji Seon Lee; Seung Hwan Cho; Won Suk Choi; Yoon Sun Choi
- Web page: https://patentgrep.com/patent/US12193257B2

## CPC

- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device including a light-emitting element, an encapsulation layer over the light-emitting element and including a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer in order, and the first inorganic encapsulation layer and the second inorganic encapsulation layer in direct contact with each other to define an inorganic encapsulation area of the display device, a supply voltage line electrically connected to the light-emitting element, a signal line which provides an electrical signal to the display area, and within the inorganic encapsulation area of the display device, the signal line overlapping the supply voltage line and an etch stop pattern between the supply voltage line and the signal line which overlap each other.

## Claims

### Claim 1

A display device comprising:
a display area comprising a light-emitting element, the light-emitting element comprising a first electrode, an emission layer and a second electrode;
an encapsulation layer over the light-emitting element, the encapsulation layer comprising:
a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer in order, and
an overlapping area of the first inorganic encapsulation layer and the second inorganic encapsulation layer in direct contact with each other to define an inorganic encapsulation area of the display device;
a supply voltage line electrically connected to the second electrode of the light-emitting element;
a signal line which provides an electrical signal to the display area; and
within the inorganic encapsulation area of the display device:
the signal line overlapping the supply voltage line; and
an etch stop pattern between the supply voltage line and the signal line which overlap each other.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the inorganic encapsulation area comprises an overlapping area where the supply voltage line and the signal line overlap each other.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the etch stop pattern corresponds to the overlapping area.

### Claim 4 (depends on 1)

The display device of claim 1, further comprising in order:
a substrate;
a first conductive layer;
a first organic insulating layer;
a second conductive layer;
a second organic insulating layer; and
a third conductive layer comprising the supply voltage line.

### Claim 5 (depends on 4)

The display device of claim 4, wherein the etch stop pattern is a pattern of the first conductive layer or the second conductive layer.

### Claim 6 (depends on 5)

The display device of claim 5, wherein within the inorganic encapsulation area of the display device, the supply voltage line and the etch stop pattern are in direct contact with each other.

### Claim 7 (depends on 4)

The display device of claim 4, wherein within the inorganic encapsulation area of the display device, the etch stop pattern comprises:
a first stack pattern as a pattern of the first conductive layer, and
a second stack pattern as a pattern of the second conductive layer.

### Claim 8 (depends on 4)

The display device of claim 4, further comprising in order:
the third conductive layer,
a third organic insulating layer, and
the first electrode, the emission layer and the second electrode of the light-emitting element.

### Claim 9 (depends on 1)

The display device of claim 1, further comprising within the inorganic encapsulation area of the display device:
an inorganic insulating layer between the etch stop pattern and the signal line, and
the inorganic insulating layer comprising:
a first thickness corresponding to the etch stop pattern, and
a second thickness outside of the etch stop pattern, the second thickness smaller than the first thickness.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the first inorganic encapsulation layer is in direct contact with the supply voltage line within the inorganic encapsulation area.

### Claim 11 (depends on 1)

The display device of claim 1, further comprising:
the signal line comprising a first end and a second end which is opposite to the first end;
a scan driver connected to the first end of the signal line; and
a driver chip connected to the second end of the signal line.

### Claim 12 (depends on 1)

The display device of claim 1, further comprising a non-display area adjacent to the display area, the non-display area comprising:
a dam,
a bank spaced apart from the dam and further from the display area than the dam, and
the inorganic encapsulation area between the dam and the bank,
wherein the supply voltage line and the signal line overlap each other in the non-display area.

### Claim 13

A display device comprising:
a substrate;
an encapsulation layer on the substrate;
in order in a thickness direction from the substrate to the encapsulation layer:
a signal line;
a first inorganic insulating layer;
a first conductive layer;
a first organic insulating layer;
a second conductive layer;
a second organic insulating layer;
a third conductive layer comprising a supply voltage line which overlaps the signal line to define an overlapping area where the supply voltage line and the signal line overlap each other;
a third organic insulating layer;
a light-emitting element comprising a first electrode, an emission layer and a second electrode in order from the substrate, the light-emitting element electrically connected to the supply voltage line; and
the encapsulation layer comprising a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer in order in the thickness direction; and
an etch stop pattern corresponding to the overlapping area.

### Claim 14 (depends on 13)

The display device of claim 13, further comprising:
an inorganic encapsulation area in which the first inorganic encapsulation layer and the second inorganic encapsulation layer are in direct contact with each other,
a portion of the inorganic encapsulation area corresponding to the overlapping area where the supply voltage line and the signal line overlap each other, and
within the portion of the inorganic encapsulation area, the etch stop pattern as a pattern of the first conductive layer or the second conductive layer.

### Claim 15 (depends on 14)

The display device of claim 14, further comprising:
a dam spaced apart from the light-emitting element;
a bank spaced apart from the dam and further from the light-emitting element than the dam, and
the inorganic encapsulation area between the dam and the bank.

### Claim 16 (depends on 15)

The display device of claim 15, wherein the first inorganic encapsulation layer is in direct contact with the supply voltage line within the inorganic encapsulation area.

### Claim 17 (depends on 13)

The display device of claim 13, further comprising:
a display area comprising the light-emitting element;
a non-display area adjacent to the display area, and
the non-display area including an inorganic encapsulation area in which the first inorganic encapsulation layer and the second inorganic encapsulation layer are in direct contact with each other.

### Claim 18 (depends on 13)

The display device of claim 13, wherein the supply voltage line and the etch stop pattern are in direct contact with each other.

### Claim 19

A display device comprising:
a display area comprising a light-emitting element comprising a first electrode, an emission layer and a second electrode;
an encapsulation layer over the light-emitting element and comprising a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer;
a supply voltage line electrically connected to the second electrode of the light-emitting element;
a signal line which provides an electrical signal to the display area and overlaps the supply voltage line;
an etch stop pattern between the supply voltage line and the signal line; and
an inorganic insulating layer between the etch stop pattern and the signal line,
wherein the inorganic insulating layer comprises:
a first thickness corresponding to the etch stop pattern, and
a second thickness outside of the etch stop pattern, the second thickness smaller than the first thickness.

### Claim 20 (depends on 19)

The display device of claim 19, further comprising:
an overlapping area where the supply voltage line and the signal line overlap each other,
an inorganic encapsulation area where the first inorganic encapsulation layer and the second inorganic encapsulation layer are in direct contact with each other, a portion of the inorganic encapsulation area corresponding to the overlapping area,
a dam,
a bank spaced apart from the dam and further from the display area than the dam, and
the inorganic encapsulation area between the dam and the bank, and
the etch stop pattern corresponding to the portion of the inorganic encapsulation area which corresponds to the overlapping area.