# US 12,008,832 B2 · Display module and display device

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- Number: US 12,008,832 B2
- Document ID: US12008832B2
- Status: Granted
- Kind: B2
- Application number: 17/800,544
- Filed: 2021-11-17
- Published: 2023-03-02
- Granted: 2024-06-11
- Earliest claimed: 2021-02-24
- Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd.
- Inventors: Xiaodong Hao; Kang Wang; Danyang Bi; Wei Chen; Wei Gong; Xiangdong Wei; Renzhe Xu; Yi Zhang
- Web page: https://patentgrep.com/patent/US12008832B2

## CPC

- G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing}
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- G06V 40/1329: {Protecting the fingerprint sensor against damage caused by the finger}
- H10K 59/126: Shielding, e.g. light-blocking means over the TFTs
- H10K 59/40: OLEDs integrated with touch screens
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K 59/8794: {Arrangements for heating and cooling}
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display module and a display device are disclosed. The display module includes a display panel, a heat dissipation film disposed on a side of the display panel facing away from a display side, and an ultrasonic fingerprint module. The heat dissipation film is provided with a first opening, and the ultrasonic fingerprint module includes a sensor disposed within the first opening and fixed on the side of the display panel facing away from the display side by a shading adhesive layer. The display module further includes a light shielding sheet attached on a side of the heat dissipation film facing away from the display panel. The light shielding sheet is provided with a second opening which exposes the sensor. An orthographic projection of the light shielding sheet and the shading adhesive layer on the display panel includes an orthographic projection of the first opening on the display panel.

## Claims

### Claim 1

A display module, comprising a display panel, a heat dissipation film disposed on a side of the display panel facing away from a display side, and an ultrasonic fingerprint module wherein:
the heat dissipation film is provided with a first opening, and the ultrasonic fingerprint module comprises a sensor which is disposed in the first opening and fixed on the side of the display panel facing away from the display side by a shading adhesive layer;
the display module further comprises a light shielding sheet that is attached to a side of the heat dissipation film facing away from the display panel, wherein the light shielding sheet is provided with a second opening which exposes the sensor, and an orthographic projection of the light shielding sheet and the shading adhesive layer on the display panel comprises an orthographic projection of the first opening on the display panel; and
a circumferential edge of the shading adhesive layer protrudes from the sensor, and an area of the light shielding sheet close to the second opening is attached to a portion of the shading adhesive layer protruding from the sensor.

### Claim 2 (depends on 1)

The display module of claim 1, wherein a gap is formed between the circumferential edge of the shading adhesive layer and a wall of the first opening.

### Claim 3 (depends on 1)

The display module of claim 1, wherein the ultrasonic fingerprint module further comprises a circuit board which comprises a binding portion bound to the sensor, and the second opening further exposes the binding portion.

### Claim 4 (depends on 1)

The display module of claim 1, wherein a thickness of the heat dissipation film is d1, and a total thickness of the sensor and the shading adhesive layer is d2, where d1>d2, and a difference between d1 and d2 ranges from 0.03 mm to 0.15 mm.

### Claim 5 (depends on 1)

The display module of claim 1, wherein the sensor comprises a circuit layer, a piezoelectric layer and a first electrode which are sequentially stacked on a base substrate, the circuit layer comprises a second electrode, the piezoelectric layer is disposed on a side of the second electrode facing away from the base substrate, and the first electrode is disposed on a side of the piezoelectric layer facing away from the second electrode; a surface of the base substrate facing away from the circuit layer is fixed on the side of the display panel facing away from the display side by the shading adhesive layer.

### Claim 6 (depends on 1)

The display module of claim 1, wherein heat dissipation layer comprises an adhesive layer, a buffer layer, and a metal layer which are sequentially stacked, and the adhesive layer is adhered to the side of the display module facing away from the display side.

### Claim 7 (depends on 1)

The display module of claim 1, wherein a shape of the first opening is a circle, a rectangle or an ellipse.

### Claim 8 (depends on 1)

The display module of claim 1, wherein the display panel comprises a display area which comprises a fingerprint identification area that corresponds to a position of the sensor.

### Claim 9 (depends on 1)

A display device, comprising the display module of claim 1.

### Claim 10 (depends on 2)

The display module of claim 2, wherein the sensor comprises a circuit layer, a piezoelectric layer and a first electrode which are sequentially stacked on a base substrate, the circuit layer comprises a second electrode, the piezoelectric layer is disposed on a side of the second electrode facing away from the base substrate, and the first electrode is disposed on a side of the piezoelectric layer facing away from the second electrode; a surface of the base substrate facing away from the circuit layer is fixed on the side of the display panel facing away from the display side by the shading adhesive layer.

### Claim 11 (depends on 3)

The display module of claim 3, wherein the sensor comprises a circuit layer, a piezoelectric layer and a first electrode which are sequentially stacked on a base substrate, the circuit layer comprises a second electrode, the piezoelectric layer is disposed on a side of the second electrode facing away from the base substrate, and the first electrode is disposed on a side of the piezoelectric layer facing away from the second electrode; a surface of the base substrate facing away from the circuit layer is fixed on the side of the display panel facing away from the display side by the shading adhesive layer.

### Claim 12 (depends on 4)

The display module of claim 4, wherein the sensor comprises a circuit layer, a piezoelectric layer and a first electrode which are sequentially stacked on a base substrate, the circuit layer comprises a second electrode, the piezoelectric layer is disposed on a side of the second electrode facing away from the base substrate, and the first electrode is disposed on a side of the piezoelectric layer facing away from the second electrode; a surface of the base substrate facing away from the circuit layer is fixed on the side of the display panel facing away from the display side by the shading adhesive layer.

### Claim 13 (depends on 2)

The display module of claim 2, wherein heat dissipation layer comprises an adhesive layer, a buffer layer, and a metal layer which are sequentially stacked, and the adhesive layer is adhered to the side of the display module facing away from the display side.

### Claim 14 (depends on 3)

The display module of claim 3, wherein heat dissipation layer comprises an adhesive layer, a buffer layer, and a metal layer which are sequentially stacked, and the adhesive layer is adhered to the side of the display module facing away from the display side.

### Claim 15 (depends on 4)

The display module of claim 4, wherein heat dissipation layer comprises an adhesive layer, a buffer layer, and a metal layer which are sequentially stacked, and the adhesive layer is adhered to the side of the display module facing away from the display side.