# US 12,601,941 B2 · Screen cover plate, display apparatus, and electronic device

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- Number: US 12,601,941 B2
- Document ID: US12601941B2
- Status: Granted
- Kind: B2
- Application number: 18/324,345
- Filed: 2023-05-26
- Published: 2023-10-05
- Granted: 2026-04-14
- Earliest claimed: 2020-11-27
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Chi Shun Chan
- Web page: https://patentgrep.com/patent/US12601941B2

## CPC

- G02F 1/133331: {Cover glasses}
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/022: Mechanical properties
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/10: of paper or cardboard
- B32B 27/281: {comprising polyimides}
- B32B 27/34: comprising polyamides
- B32B 37/12: characterised by using adhesives
- G02F 1/133305: {Flexible substrates, e.g. plastics, organic film}
- B32B 2250/02: 2 layers
- B32B 2250/24: All layers being polymeric
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/26: Polymeric coating
- B32B 2307/412: Transparent
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/7376: Thickness
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- G02F 2202/28: Adhesive materials or arrangements
- H10K 59/872: {Containers}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

In accordance with an embodiment, a screen cover plate includes: a first force-bearing plate and a second force-bearing plate, wherein the first force-bearing plate and the second force-bearing plate are disposed in a laminated manner, and both the first force-bearing plate and the second force-bearing plate are flexible transparent plates; and an optical adhesive layer located between the first force-bearing plate and the second force-bearing plate, and bonding the first force-bearing plate and the second force-bearing plate together, wherein a material of the optical adhesive layer is curable optical adhesive.

## Claims

### Claim 1

A screen cover plate, comprising:
a first force-bearing plate and a second force-bearing plate, wherein the first force-bearing plate and the second force-bearing plate are disposed in a laminated manner, and both the first force-bearing plate and the second force-bearing plate are flexible transparent plates; and
an optical adhesive layer located between the first force-bearing plate and the second force-bearing plate, wherein the first force-bearing plate and the second force-bearing plate are bonded together via the optical adhesive layer, and a material of the optical adhesive layer is curable optical adhesive, wherein the screen cover plate satisfies the following relationship:
E
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
*
t
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
+
E
optical
⁢
adhesive
⁢
layer
*
t
optical
⁢
adhesive
⁢
layer
+
E
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
*
t
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
t
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
+
t
optical
⁢
adhesive
⁢
layer
+
t
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
>
E
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
,
wherein
Efirst force-bearing plate is a Young's modulus of the first force-bearing plate;
tfirst force-bearing plate is a thickness of the first force-bearing plate;
Eoptical adhesive layer is a Young's modulus of the optical adhesive layer;
toptical adhesive layer is a thickness of the optical adhesive layer;
Esecond force-bearing plate is a Young's modulus of the second force-bearing plate; and
tsecond force-bearing plate is a thickness of the second force-bearing plate.

### Claim 2 (depends on 1)

The screen cover plate according to claim 1, wherein the material of the optical adhesive layer is light-curable optical adhesive or heat-curable optical adhesive.

### Claim 3 (depends on 1)

The screen cover plate according to claim 1, wherein a material of the first force-bearing plate is polyimide.

### Claim 4 (depends on 1)

The screen cover plate according to claim 1, wherein a material of the second force-bearing plate is polyimide or polyamide.

### Claim 5 (depends on 1)

The screen cover plate according to claim 1, wherein the screen cover plate further comprises a hardened coating located on a plate surface of the first force-bearing plate facing away from the optical adhesive layer.

### Claim 6 (depends on 5)

The screen cover plate according to claim 5, wherein a material of the hardened coating is acrylate or silane.

### Claim 7 (depends on 1)

The screen cover plate according to claim 1, wherein a flexibility of the first force-bearing plate is greater than or equal to a flexibility of the second force-bearing plate.

### Claim 8 (depends on 1)

The screen cover plate according to claim 1, wherein the thickness of the first force-bearing plate is less than or equal to the thickness of the second force-bearing plate.

### Claim 9

A display apparatus, comprising:
a display panel; and
a screen cover plate disposed on a display surface of the display panel, the screen cover plate comprising:
a first force-bearing plate and a second force-bearing plate, wherein the first force-bearing plate and the second force-bearing plate are disposed in a laminated manner, both the first force-bearing plate and the second force-bearing plate are flexible transparent plates, and the first force-bearing plate is disposed further away from the display panel than the second force-bearing plate,
an optical adhesive layer located between the first force-bearing plate and the second force-bearing plate, wherein the first force-bearing plate and the second force-bearing plate are bonded together via the optical adhesive layer, and a material of the optical adhesive layer is curable optical adhesive, wherein the screen cover plate satisfies the following relationship:
E
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
*
t
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
+
E
optical
⁢
adhesive
⁢
layer
*
t
optical
⁢
adhesive
⁢
layer
+
E
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
*
t
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
t
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
+
t
optical
⁢
adhesive
⁢
layer
+
t
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
>
E
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
,
wherein
Efirst force-bearing plate is a Young's modulus of the first force-bearing plate;
tfirst force-bearing plate is a thickness of the first force-bearing plate;
Eoptical adhesive layer is a Young's modulus of the optical adhesive layer;
toptical adhesive layer is a thickness of the optical adhesive layer;
Esecond force-bearing plate is a Young's modulus of the second force-bearing plate; and
tsecond force-bearing plate is a thickness of the second force-bearing plate.

### Claim 10 (depends on 9)

The display apparatus according to claim 9, wherein the material of the optical adhesive layer is light-curable optical adhesive or heat-curable optical adhesive.

### Claim 11 (depends on 10)

The display apparatus according to claim 10, wherein:
a material of the first force-bearing plate is polyimide; and
a material of the second force-bearing plate is polyimide or polyamide.

### Claim 12 (depends on 10)

The display apparatus according to claim 10, wherein the screen cover plate further comprises a hardened coating located on a plate surface of the first force-bearing plate facing away from the optical adhesive layer.

### Claim 13 (depends on 12)

The display apparatus according to claim 12, wherein a material of the hardened coating is acrylate or silane.

### Claim 14 (depends on 10)

The display apparatus according to claim 10, wherein a flexibility of the first force-bearing plate is greater than or equal to a flexibility of the second force-bearing plate.

### Claim 15 (depends on 10)

The display apparatus according to claim 10, wherein the thickness of the first force-bearing plate is less than or equal to the thickness of the second force-bearing plate.

### Claim 16 (depends on 10)

The display apparatus according to claim 10, further comprising a bonding layer between the display panel and the second force-bearing plate.

### Claim 17 (depends on 9)

An electronic device, comprising a housing and the display apparatus according to claim 9, wherein the display apparatus is mounted in the housing in a fastened manner.

### Claim 18

A method, comprising:
adhering a first force-bearing plate to a second force-bearing plate using an optical adhesive layer to form a screen cover plate in which the first force-bearing plate and the second force-bearing plate are disposed in a laminated manner, wherein the first force-bearing plate and the second force-bearing plate are flexible transparent plates; and
adhering the second force-bearing plate to a surface of a display using a curable optical adhesive to form the optical adhesive layer located between the first force-bearing plate and the second force-bearing plate, such that the first force-bearing plate and the second force-bearing plate are bonded together via the optical adhesive layer, wherein the screen cover plate satisfies the following relationship:
E
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
*
t
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
+
E
optical
⁢
adhesive
⁢
layer
*
t
optical
⁢
adhesive
⁢
layer
+
E
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
*
t
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
t
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
+
t
optical
⁢
adhesive
⁢
layer
+
t
second
⁢
force
⁢
‐
⁢
bearing
⁢
plate
>
E
first
⁢
force
⁢
‐
⁢
bearing
⁢
plate
,
wherein
Efirst force-bearing plate is a Young's modulus of the first force-bearing plate;
tfirst force-bearing plate is a thickness of the first force-bearing plate;
Eoptical adhesive layer is a Young's modulus of the optical adhesive layer;
toptical adhesive layer is a thickness of the optical adhesive layer;
Esecond force-bearing plate is a Young's modulus of the second force-bearing plate; and
tsecond force-bearing plate is a thickness of the second force-bearing plate.

### Claim 19 (depends on 18)

The method of claim 18, wherein a flexibility of the first force-bearing plate is greater than or equal to a flexibility of the second force-bearing plate.

### Claim 20 (depends on 18)

The method of claim 18, wherein a material of the optical adhesive layer is light-curable optical adhesive or heat-curable optical adhesive.