# US 12,223,910 B2 · Display panel

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,223,910 B2
- Document ID: US12223910B2
- Status: Granted
- Kind: B2
- Application number: 18/490,828
- Filed: 2023-10-20
- Published: 2024-04-25
- Granted: 2025-02-11
- Earliest claimed: 2022-10-24
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hyewon Kim; Sungjin Hong; Yoomin Ko; Sunho Kim; Juchan Park; Pilsuk Lee; Chung Sock Choi
- Web page: https://patentgrep.com/patent/US12223910B2

## CPC

- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT]
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G09G 2320/043: Preventing or counteracting the effects of ageing
- G09G 2340/0457: Improvement of perceived resolution by subpixel rendering
- H10K 59/8052: {Cathodes}
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel includes a transistor, a light emitting device electrically connected to the transistor, a connection wiring electrically connecting the transistor to the light emitting device and including side surfaces, a capping pattern disposed on the transistor and contacting at least a side surface among side surfaces, an upper insulating layer disposed on the transistor and including a first opening that overlaps the at least the side surface, and a pixel definition layer disposed on the upper insulating layer and covering the first opening of the upper insulating layer.

## Claims

### Claim 1

A display panel comprising:
a transistor;
a light emitting device electrically connected to the transistor;
a connection wiring electrically connecting the transistor to the light emitting device and comprising side surfaces;
a capping pattern disposed on the transistor and contacting at least one side surface among the side surfaces, the capping pattern electrically connecting the light emitting device to the connection wiring;
an upper insulating layer disposed on the transistor and including a first opening that overlaps the at least one side surface; and
a pixel definition layer disposed on the upper insulating layer and covering part of the first opening of the upper insulating layer.

### Claim 2 (depends on 1)

The display panel of claim 1, wherein
a side surface among the side surfaces is exposed by the first opening, and
the capping pattern contacts the one side surface among the side surfaces.

### Claim 3 (depends on 1)

The display panel of claim 1, wherein the capping pattern comprises:
a first portion contacting the at least one side surface among the side surfaces; and
a second portion that does not overlap the upper insulating layer.

### Claim 4 (depends on 3)

The display panel of claim 3, wherein
the pixel definition layer comprises:
a first slant surface defined in the pixel definition layer covering the second portion of the capping pattern; and
a second slant surface defined in the pixel definition layer disposed on the upper insulating layer, and
a first angle between the upper insulating layer and the first slant surface is greater than a second angle between the upper insulating layer and the second slant surface.

### Claim 5 (depends on 3)

The display panel of claim 3, wherein
the pixel definition layer comprises a slant surface having a stepped shape, and
the slant surface comprises:
a first side slant surface defined in the pixel definition layer covering the second portion of the capping pattern;
a connection surface extending from the first side slant surface; and
a second side slant surface extending from the connection surface.

### Claim 6 (depends on 5)

The display panel of claim 5, wherein a taper angle of the first side slant surface is different from a taper angle of the second side slant surface.

### Claim 7 (depends on 1)

The display panel of claim 1, wherein
two side surfaces among the side surfaces are exposed by the first opening, and
the capping pattern contacts the two side surfaces.

### Claim 8 (depends on 7)

The display panel of claim 7, wherein the two side surfaces are connected.

### Claim 9 (depends on 7)

The display panel of claim 7, wherein the two side surfaces are spaced apart from each other in a first direction and extend in a second direction intersecting the first direction.

### Claim 10 (depends on 1)

The display panel of claim 1, wherein
three side surfaces among the side surfaces are exposed by the first opening, and
the capping pattern contacts the three side surfaces.

### Claim 11 (depends on 1)

The display panel of claim 1, wherein
the pixel definition layer includes a second opening overlapping the at least one side surface, and
the capping pattern covers the second opening of the pixel definition layer.

### Claim 12

A display panel comprising:
a light emitting device;
a transistor electrically connected to the light emitting device;
a connection wiring comprising:
a first connection part electrically connected to the light emitting device and comprising side surfaces; and
a second connection part electrically connected to the transistor;
an upper insulating layer including a first opening that overlaps at least one side surface among the side surfaces;
a capping pattern covering the first connection part and including an electrically conductive material; and
a pixel definition layer covering an edge of the capping pattern.

### Claim 13 (depends on 12)

The display panel of claim 12, wherein
the capping pattern comprises:
a first portion contacting the at least one side surface; and
a second portion that does not overlap the upper insulating layer,
the pixel definition layer comprises:
a first slant surface defined in the pixel definition layer covering the second portion of the capping pattern; and
a second slant surface defined in the pixel definition layer disposed on the upper insulating layer, and
a first angle between the upper insulating layer and the first slant surface is greater than a second angle between the upper insulating layer and the second slant surface.

### Claim 14 (depends on 12)

The display panel of claim 12, wherein
a side surface among the side surfaces is exposed via the first opening, and
the capping pattern contacts the one side surface.

### Claim 15 (depends on 12)

The display panel of claim 12, wherein
the pixel definition layer comprises a slant surface having a stepped shape,
the slant surface comprises:
a first side slant surface defined in the pixel definition layer covering a second portion of the capping pattern;
a connection surface extending from the first side slant surface; and
a second side slant surface extending from the connection surface, and
the first side slant surface has a taper angle different from a taper angle of the second side slant surface.

### Claim 16 (depends on 12)

The display panel of claim 12, wherein
two side surfaces connected to each other among the side surfaces are exposed via the first opening, and
the capping pattern contacts the two side surfaces.

### Claim 17 (depends on 12)

The display panel of claim 12, wherein
two side surfaces among the side surfaces are exposed via the first opening,
the capping pattern contacts the two side surfaces, and
the two side surfaces are spaced apart from each other in a first direction and extend in a second direction intersecting the first direction.

### Claim 18 (depends on 12)

The display panel of claim 12, wherein
three side surfaces among the side surfaces are exposed by the first opening, and
the capping pattern contacts the three side surfaces.

### Claim 19

A display panel comprising:
a transistor;
a light emitting device electrically connected to the transistor;
a connection wiring electrically connecting the transistor to the light emitting device and comprising side surfaces;
a lower insulating layer disposed on the transistor;
an upper insulating layer disposed on the lower insulating layer and including a first opening that overlaps at least one side surface among the side surfaces of the connection wiring; and
a pixel definition layer disposed on the upper insulating layer, wherein
the pixel definition layer comprises:
a first slant surface covering a portion of the first opening; and
a second slant surface disposed on the upper insulating layer, and
a first angle between the lower insulating layer and the first slant surface is greater than a second angle between the upper insulating layer and the second slant surface, and
a third angle between an upper surface of the lower insulating layer and a side surface of the upper insulating layer is equivalent to the second angle.

### Claim 20 (depends on 19)

The display panel of claim 19, further comprising:
a capping pattern disposed on the lower insulating layer and contacting at least one side surface among the side surfaces.