# US 12,114,440 B2 · Display device

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- Number: US 12,114,440 B2
- Document ID: US12114440B2
- Status: Granted
- Kind: B2
- Application number: 17/600,058
- Filed: 2021-08-03
- Published: 2024-02-08
- Granted: 2024-10-08
- Earliest claimed: 2021-07-22
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Lijun Qin; Chihshun Tang
- Web page: https://patentgrep.com/patent/US12114440B2

## CPC

- H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)}
- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- G06F 1/203: {for portable computers, e.g. for laptops}
- H05K 7/20963: {Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20972 takes precedence)}
- G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED}
- H10K 59/8794: {Arrangements for heating and cooling}
- H10K 77/111: {Flexible substrates}
- H10K 2102/311: {Flexible OLED}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present application provides a display device. The display device includes a display panel, an adhesive layer, and a heat dissipation buffer layer. The adhesive layer in the present application is arranged between a display portion and a bonding portion. The heat dissipation buffer layer is arranged at one side of the display portion of the display panel facing the bonding portion. A projection of the heat dissipation buffer layer projected on the display portion does not overlap a projection of the adhesive layer projected on the display portion.

## Claims

### Claim 1

A display device, comprising:
a display panel comprising a display portion, a bonding portion bent to a back of the display panel, and a bending portion connecting the display portion and the bonding portion;
an adhesive layer disposed between the display portion and the bonding portion;
a first backplate disposed between the adhesive layer and the display portion;
a second backplate disposed between the adhesive layer and the bonding portion, wherein the adhesive layer is disposed between the first backplate and the second backplate; and
a heat dissipation buffer layer disposed at one side of the display portion of the display panel facing the bonding portion;
wherein an orthographic projection of the heat dissipation buffer layer projected on the display portion avoids overlapping an orthographic projection of the adhesive layer projected on the display portion,
wherein a bending radius of the bending portion is r, a film thickness of the adhesive layer is h1, a film thickness of the first backplate is h2, a film thickness of the second backplate is h3, and h1+h2+h3=2r.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the heat dissipation buffer layer is arranged at one side of the adhesive layer away from the bending portion.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein h1+h2+h3<0.5 mm.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein the adhesive layer comprises a first adhesive layer disposed between the display portion and the bonding portion.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein the adhesive layer further comprises:
a second adhesive layer disposed between the first adhesive layer and the display portion; and
an intermediate layer disposed between the first adhesive layer and the second adhesive layer;
wherein a material of the intermediate layer comprises one of thermoplastic polyester or foam.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein the first backplate comprises:
a first substrate disposed between the adhesive layer and the display portion; and
a first polyester layer disposed between the first substrate and the display portion.

### Claim 7 (depends on 1)

The display device according to claim 1, wherein the second backplate comprises:
a second substrate disposed between the adhesive layer and the bonding portion; and
a second polyester layer disposed between the second substrate and the bonding portion.

### Claim 8 (depends on 1)

The display device according to claim 1, further comprising:
a third adhesive layer disposed on the bending portion, a portion of the display portion, and a portion of the bonding portion.