# US 2025/0169280 A1 · Display panel and electronic device including same

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- Number: US 2025/0169280 A1
- Document ID: US20250169280A1
- Status: Published application
- Kind: A1
- Application number: 18/784,552
- Filed: 2024-07-25
- Published: 2025-05-22
- Earliest claimed: 2023-11-21
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Un Sang YU; Bong Choon KWAK
- Web page: https://patentgrep.com/patent/US20250169280A1

## CPC

- H10K 59/121: characterised by the geometry or disposition of pixel elements
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 50/856: comprising reflective means
- H10K 59/1275: {Electrical connections of the two substrates}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 59/878: {comprising reflective means}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel and an electronic device including the same are disclosed. A display panel includes metal layers, a first insulating layer covering the metal layers, a first reflective layer on the first insulating layer of a first sub-pixel, a second insulating layer covering the first reflective layer, a second reflective layer on the second insulating layer of a second sub-pixel, a third insulating layer covering the second reflective layer, a third reflective layer on the third insulating layer of a third sub-pixel, and first electrodes on the third insulating layer of each of the first to third sub-pixels. A plurality of holes penetrating the first to third insulating layers of each of the first to third sub-pixels is formed, and the metal layer of each of the first to third sub-pixels is coupled to the first electrode of each of the first to third sub-pixels through each hole.

## Claims

### Claim 1

A display panel comprising:
a plurality of metal layers on each of a first sub-pixel, a second sub-pixel, and a third sub-pixel;
a first insulating layer covering the plurality of metal layers;
a first reflective layer on an upper portion of the first insulating layer of the first sub-pixel;
a second insulating layer covering the first reflective layer;
a second reflective layer on the second insulating layer of the second sub-pixel;
a third insulating layer covering the second reflective layer;
a third reflective layer on the third insulating layer of the third sub-pixel;
a plurality of first electrodes on the third insulating layer of each of the first to third sub-pixels; and
a plurality of holes penetrating the first to third insulating layers of each of the first to third sub-pixels,
wherein the metal layer of each of the first to third sub-pixels is electrically connected to the first electrode of each of the first to third sub-pixels through each hole of the plurality of holes.

### Claim 2 (depends on 1)

The display panel of claim 1, further comprising:
a first residual reflective layer on an upper portion of each of the first insulating layers of the second and third sub-pixels;
a second residual reflective layer on an upper portion of each of the second insulating layers of the first and third sub-pixels; and
a third residual reflective layer on an upper portion of each of the third insulating layers of the first and second sub-pixels.

### Claim 3 (depends on 2)

The display panel of claim 2, wherein the first to third residual reflective layers have sizes smaller than the sizes of the first to third reflective layers.

### Claim 4 (depends on 3)

The display panel of claim 3, wherein the first to third residual reflective layers have different sizes depending on a wavelength band of light.

### Claim 5 (depends on 1)

The display panel of claim 1, further comprising a via in each of the plurality of holes, and
wherein the metal layer is electrically connected to the first electrode through the via.

### Claim 6 (depends on 2)

The display panel of claim 2, wherein each of the third residual reflective layer on an upper portion of the third insulating layer of each of the first and second sub-pixels and the third reflective layer on an upper portion of the third insulating layer of the third sub-pixel has an upper surface in contact with the first electrode, and a lower surface electrically connected to the metal layer through a via in each hole.

### Claim 7 (depends on 2)

The display panel of claim 2, wherein each of the plurality of holes includes a first hole and a second hole,
wherein the first hole penetrates the first insulating layer, and
wherein the second hole penetrates the second insulating layer and the third insulating layer.

### Claim 8 (depends on 7)

The display panel of claim 7, wherein the first reflective layer of the first sub-pixel and the first residual reflective layer of the second to third sub-pixels are electrically connected to the metal layer through a via in the first hole and electrically connected to the first electrode through a via in the second hole.

### Claim 9 (depends on 2)

The display panel of claim 2, wherein the third residual reflective layers of the first and second sub-pixels and the third reflective layer of the third sub-pixel extend along the one hole to be electrically connected to each metal layer.

### Claim 10 (depends on 9)

The display panel of claim 9, wherein the third residual reflective layer of the first and second sub-pixels and the third reflective layer of the third sub-pixel have an upper surface of a portion in the third insulating layer in contact with the first electrode, and a lower surface of a portion along each hole in contact with each metal layer.

### Claim 11 (depends on 9)

The display panel of claim 9, wherein each of the plurality of holes includes a first hole and a second hole, the first hole penetrates the first insulating layer, and the second hole penetrates the second insulating layer and the third insulating layer.

### Claim 12 (depends on 11)

The display panel of claim 11, wherein the first reflective layer of the first sub-pixel and the first residual reflective layer of the second to third sub-pixels are electrically connected to the metal layer through a via in the first hole, and are electrically connected to each first electrode through a third residual reflective layer of the first and second sub-pixels along the second hole and a third reflective layer of the third sub-pixel.

### Claim 13 (depends on 1)

The display panel of claim 1, further comprising:
a second residual reflective layer on an upper portion of the second insulating layer of the first sub-pixel; and
a third residual reflective layer on an upper portion of each of the third insulating layers of the first and second sub-pixels.

### Claim 14 (depends on 1)

The display panel of claim 1, further comprising a residual reflective layer formed in each sub-pixel,
wherein in each sub-pixel, the residual reflective layer is formed on the insulating layer different from a layer on which a corresponding reflective layer is formed.

### Claim 15

A display panel comprising:
a metal layer;
a first insulating layer covering the metal layer;
a first reflective layer on an upper portion of the first insulating layer;
a second insulating layer covering the first reflective layer;
a second reflective layer on an upper portion of the second insulating layer;
a third insulating layer covering the second reflective layer;
a third reflective layer on an upper portion of the third insulating layer;
a first electrode on an upper portion of the third insulating layer; and
a hole penetrating the first to third insulating layers,
wherein the metal layer is electrically connected to the first electrode through the hole.

### Claim 16 (depends on 15)

The display panel of claim 15, wherein one of the first reflective layer, the second reflective layer, and the third reflective layer have a same size as the first electrode according to a color of the sub-pixel, and
wherein the remaining two reflective layers have a smaller size than the first electrode.

### Claim 17 (depends on 15)

The display panel of claim 15, wherein the metal layer is formed on each of a first, second and third sub-pixels,
wherein the display panel further comprises a residual reflective layer formed in each sub-pixel, and
wherein in each sub-pixel, the residual reflective layer is formed on the insulating layer different from a layer on which a corresponding reflective layer is formed.