# US 12,007,812 B2 · Flexible display panel and flexible display device

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- Number: US 12,007,812 B2
- Document ID: US12007812B2
- Status: Granted
- Kind: B2
- Application number: 17/280,828
- Filed: 2020-12-30
- Published: 2023-05-18
- Granted: 2024-06-11
- Earliest claimed: 2020-12-29
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Jialiang Tang
- Web page: https://patentgrep.com/patent/US12007812B2

## CPC

- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- H10K 77/10: Substrates, e.g. flexible substrates
- G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED}
- H04M 1/0268: {including a flexible display panel}
- H10K 59/80: Constructional details
- H10K 77/111: {Flexible substrates}
- H10K 2102/311: {Flexible OLED}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)

## Abstract

A flexible display panel and a flexible display device are provided. The flexible display panel includes a flexible display screen and a support provided on a backside of the flexible display screen. The flexible display screen includes a first bending region and a second bending region disposed on two opposite sides of the first bending region, and the second bending region is positioned at an edge of the flexible display. The support includes a first folding portion corresponding to the first bending region and a hollowed-out structure corresponding to the second bending region.

## Claims

### Claim 1

A flexible display device, comprising a middle frame module and a flexible display panel, wherein the flexible display panel comprises:
a flexible display screen comprising a first bending region and a second bending region positioned on two opposite sides of the first bending region, wherein the second bending region is positioned at an edge of the flexible display screen; and
a support disposed on a backside of the flexible display screen and connected to the flexible display screen, wherein the support comprises a first folding portion corresponding to the first bending region and a hollowed-out structure corresponding to the second bending region;
wherein the middle frame module is positioned on a backside of the flexible display panel and is connected to the flexible display panel, the middle frame module comprises a folding region corresponding to the first bending region, a portion of the flexible display screen positioned in the second bending region is bent to the backside of the flexible display screen to form a first curved portion, the first curved portion comprises a first horizontal plane that faces towards the middle frame module and is at an end edge of the first curved portion, the middle frame module further comprises a second curved portion corresponding to the first curved portion, a curved surface of the second curved portion is matched with a curved surface of the first curved portion, and the second curved portion comprises a second horizontal plane that is at an end edge of the second curved portion and attached to the first horizontal plane.

### Claim 2 (depends on 1)

The flexible display device according to claim 1, wherein a first grid-structure is provided at the first folding portion.

### Claim 3 (depends on 2)

The flexible display device according to claim 2, wherein the hollowed-out structure comprises a second folding portion corresponding to the second bending region and a second grid-structure provided at the second folding portion, and the second folding portion is positioned at an edge of the support.

### Claim 4 (depends on 3)

The flexible display device according to claim 3, wherein the second grid-structure extends to an edge of the second folding portion in a direction away from the first folding portion.

### Claim 5 (depends on 3)

The flexible display device according to claim 3, wherein a distance between the edge of the second folding portion away from the first folding portion and the second grid-structure is greater than zero.

### Claim 6 (depends on 3)

The flexible display device according to claim 3, wherein a grid density of the second grid-structure is less than a grid density of the first grid-structure.

### Claim 7 (depends on 3)

The flexible display device according to claim 3, wherein the support comprises a first surface close to the flexible display screen and a second surface away from the flexible display screen, and a first grid-hole of the first grid-structure and a second grid-hole of the second grid-structure both connect the first surface to the second surface.

### Claim 8 (depends on 7)

The flexible display device according to claim 7, wherein the first grid-hole and the second grid-hole are filled with a buffer material.

### Claim 9 (depends on 1)

The flexible display device according to claim 1, wherein a bending axis of the first bending region is parallel to a bending axis of the second bending region.