# US 12,004,365 B2 · Display device

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- Number: US 12,004,365 B2
- Document ID: US12004365B2
- Status: Granted
- Kind: B2
- Application number: 18/224,531
- Filed: 2023-07-20
- Published: 2023-11-23
- Granted: 2024-06-04
- Earliest claimed: 2019-12-31
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Hong-Gyu Han; Byung-Jun Lim; Hwa-Jun Jung
- Web page: https://patentgrep.com/patent/US12004365B2

## CPC

- H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light}
- H10K 50/818: Reflective anodes, e.g. ITO combined with thick metallic layers
- H10K 50/824: combined with auxiliary electrodes
- H10K 50/868: {Arrangements for polarized light emission (H10K50/86 takes precedence)}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/80522: {combined with auxiliary electrodes}
- H10K 59/877: {comprising scattering means}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An display device may include a substrate including an active area and an inactive area surrounding the active area, a plurality of thin film transistors disposed in the active area, each of the thin film transistor including a semiconductor layer and a first electrode, a light emitting elements disposed in the active area, each of the light emitting element including an anode electrode and an organic light emitting layer, a connection area and a peripheral area disposed in the inactive area, and a first reflective electrode disposed in the connection area.

## Claims

### Claim 1

A display device, comprising:
a display panel including a display area and a non-display area surrounding the display area, the non-display area including an outer area and first and second areas between the outer area and the display area;
a thin film transistor disposed in the display area;
a light emitting element disposed in the display area, the light emitting element having a light emitting layer and a first electrode connected to the thin film transistor;
an outer electrode disposed in the outer area;
a first reflective electrode disposed in the first area;
a second reflective electrode disposed in the second area; and
an insulating layer in the display area and the non-display area, the insulating layer including an opening to expose the first electrode in the display area and being disposed over the first and second reflective electrodes respectively in the first and second areas.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the first reflective electrode is formed of a same material as the first electrode.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the thin film transistor includes a semiconductor layer, a gate electrode, a source electrode, and a drain electrode.

### Claim 4 (depends on 3)

The display device of claim 3, wherein the second reflective electrode is formed of a same material as the source electrode and the drain electrode.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the first reflective electrode includes a plurality of first holes.

### Claim 6 (depends on 5)

The display device of claim 5, wherein the plurality of first holes are arranged at regular intervals and in a regular shape.

### Claim 7 (depends on 6)

The display device of claim 6, wherein the first holes are formed in a square shape.

### Claim 8 (depends on 1)

The display device of claim 1, further comprising a connection electrode under the first reflective electrode.

### Claim 9 (depends on 8)

The display device of claim 8, wherein:
the thin film transistor includes a source electrode and a drain electrode, and
the connection electrode is formed of a same material as the source electrode and the drain electrode.

### Claim 10 (depends on 8)

The display device of claim 8, wherein the thin film transistor includes a gate electrode, and the connection electrode is formed of a same material as the gate electrode.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the connection electrode extends to the second area to be connected to the second reflective electrode.

### Claim 12 (depends on 1)

The display device of claim 1, wherein the light emitting element further includes a second electrode connected to the first reflective electrode.

### Claim 13 (depends on 1)

The display device of claim 1, wherein a high potential voltage or a data signal is applied to the second reflective electrode.

### Claim 14 (depends on 1)

The display device of claim 1, further comprising a polarization film disposed over and overlapping with the first reflective electrode.

### Claim 15 (depends on 14)

The display device of claim 14, wherein the polarization film overlaps with the second reflective electrode over the second reflective electrode.