# US 12,183,768 B2 · Display device and tiled display including the same

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- Number: US 12,183,768 B2
- Document ID: US12183768B2
- Status: Granted
- Kind: B2
- Application number: 17/347,046
- Filed: 2021-06-14
- Published: 2021-12-30
- Granted: 2024-12-31
- Earliest claimed: 2020-06-25
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Dae Hwan Jang; Woo Yong Sung; Jin Ho Cho
- Web page: https://patentgrep.com/patent/US12183768B2

## CPC

- H10W 90/00: Package configurations
- H10H 20/851: Wavelength conversion means
- H10H 20/852: Encapsulations
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout}
- H10K 59/18: Tiled displays
- H10K 59/873: {Encapsulations}
- H10W 70/688: {Flexible insulating substrates}
- H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings
- H10H 20/855: Optical field-shaping means, e.g. lenses
- H10K 77/111: {Flexible substrates}
- H10K 2102/351: {Thickness}
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device includes a substrate comprising a display part, a pad part, and a bending part between the display part and the pad part, a display layer disposed on a first surface of the display part and comprising pixels, a pad electrode disposed on a first surface of the pad part, and a metal layer disposed on a second surface of the display part and on a second surface of the pad part. The second surface of the display part is opposite to the first surface of the display part, and the second surface of the pad part is opposite to the first surface of the pad part. A thickness of the bending part is smaller than at least one of a thickness of the display part and a thickness of the pad part. A planar shape of the bending part is determined by the metal layer.

## Claims

### Claim 1

A display device comprising:
a substrate comprising a display part, a pad part, and a bending part between the display part and the pad part;
a display layer disposed on a first surface of the display part, the display layer comprising pixels;
a pad electrode disposed on a first surface of the pad part; and
a metal layer disposed on a second surface of the display part and on a second surface of the pad part, the second surface of the display part being opposite to the first surface of the display part, and the second surface of the pad part being opposite to the first surface of the pad part, wherein
a planar shape of the bending part is determined by the metal layer,
the substrate is disposed between the display layer and the metal layer in the display part,
the substrate is a base member comprised of an insulating material selected from polyimide (PD) and polymer resin, and
a thickness of the substrate in the bending part is smaller than a thickness of the substrate in each of the display part and the pad part.

### Claim 2 (depends on 1)

The display device of claim 1, wherein
the metal layer comprises a metal oxide that is resistant to dry etching, and
an etch rate of the metal layer is lower than an etch rate of the substrate.

### Claim 3 (depends on 1)

The display device of claim 1, wherein a thermal conductivity of the metal layer is higher than a thermal conductivity of the substrate.

### Claim 4 (depends on 1)

The display device of claim 1, wherein the pad part overlaps the display part in a thickness direction in case that the bending part is bent.

### Claim 5 (depends on 1)

The display device of claim 1, further comprising a protective film covering the metal layer disposed on the second surface of the display part and the metal layer disposed on the second surface of the pad part.

### Claim 6 (depends on 5)

The display device of claim 5, wherein a part of the protective film covering the metal layer disposed on the second surface of the display part and another part of the protective film covering the metal layer disposed on the second surface of the pad part face each other in case that the bending part is bent.

### Claim 7 (depends on 1)

The display device of claim 1, further comprising:
a flexible film electrically connected to the pad electrode; and
a source driver disposed on the flexible film,
wherein the flexible film and the source driver overlap the display part in a thickness direction in case that the bending part is bent.

### Claim 8 (depends on 1)

The display device of claim 1, wherein the display layer comprises:
a thin-film transistor layer disposed on the display part and comprising at least one thin-film transistor;
a light emitting element layer disposed on the thin-film transistor layer and comprising a light-emitting element electrically connected to the at least one thin-film transistor;
a wavelength conversion layer disposed on the light emitting element layer and comprising a wavelength converting unit overlapping the light-emitting element; and
a color filter layer disposed on the wavelength conversion layer and comprising a color filter overlapping the wavelength converting unit.

### Claim 9 (depends on 1)

The display device of claim 1, wherein the metal layer comprises a material selected from aluminum (Al), copper (Cu), nickel (Ni), ferrite, silver (Ag), and a combination thereof.

### Claim 10 (depends on 1)

The display device of claim 1, wherein an image produced by the display layer is viewed from the first surface and not the second surface.