# US 11,910,661 B2 · Display substrate for double-sided display and manufacturing method thereof, display panel and display device

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- Number: US 11,910,661 B2
- Document ID: US11910661B2
- Status: Granted
- Kind: B2
- Application number: 17/287,064
- Filed: 2020-05-26
- Published: 2021-11-18
- Granted: 2024-02-20
- Earliest claimed: 2019-06-20
- 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: Chenyu Chen; Yuhsiung Feng
- Web page: https://patentgrep.com/patent/US11910661B2

## CPC

- B06B 1/0644: {using a single piezoelectric element (B06B1/0688 takes precedence)}
- B06B 1/0688: {with foil-type piezoelectric elements, e.g. PVDF}
- H10K 59/128: comprising two independent displays, e.g. for emitting information from two major sides of the display
- H10K 59/805: {Electrodes}
- H10N 30/20: with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N 30/302: {Sensors}
- H10N 39/00: Integrated devices, or assemblies of multiple devices, comprising at least one piezoelectric, electrostrictive or magnetostrictive element covered by groups H10N30/00 – H10N35/00
- H10K 59/1201: {Manufacture or treatment}
- B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A display substrate includes: a base substrate having a first side and a second side opposite to each other; a transmitter arranged on the first side of the base substrate, and configured to convert a first display electrical signal into a conduction signal; a first light-emitting element arranged on a side of the transmitter away from the base substrate, wherein the first light-emitting element emits light under a driving action of the first display electrical signal; a receiver arranged on the second side of the base substrate, and configured to receive the conduction signal and convert the conduction signal into a second display electrical signal; and a second light-emitting element arranged on a side of the receiver away from the base substrate, wherein the second light-emitting element emits light under a driving action of the second display electrical signal.

## Claims

### Claim 1

A display substrate, comprising:
a base substrate having a first side and a second side opposite to each other;
a transmitter arranged on the first side of the base substrate, and configured to convert a first display electrical signal into a conduction signal;
a first light-emitting element arranged on a side of the transmitter away from the base substrate, wherein the first light-emitting element emits light under a driving action of the first display electrical signal;
a receiver arranged on the second side of the base substrate, and configured to receive the conduction signal and convert the conduction signal into a second display electrical signal; and
a second light-emitting element arranged on a side of the receiver away from the base substrate, wherein the second light-emitting element emits light under a driving action of the second display electrical signal.

### Claim 2 (depends on 1)

The display substrate according to claim 1, wherein the conduction signal is an ultrasonic signal or an optical signal.

### Claim 3 (depends on 1)

The display substrate according to claim 1, wherein a driving circuit is provided on the first side of the base substrate, and no driving circuit is provided on the second side of the base substrate.

### Claim 4 (depends on 1)

The display substrate according to claim 1, wherein the transmitter is a piezoelectric transmitter, and the receiver is a piezoelectric receiver.

### Claim 5 (depends on 4)

The display substrate according to claim 4, wherein the transmitter comprises:
a first transmitting electrode and a second transmitting electrode arranged opposite to each other; and
a first piezoelectric material layer located between the first transmitting electrode and the second transmitting electrode, wherein the first piezoelectric material layer has an inverse piezoelectric effect.

### Claim 6 (depends on 5)

The display substrate according to claim 5, wherein the receiver comprises:
a first receiving electrode and a second receiving electrode arranged opposite to each other; and
a second piezoelectric material layer located between the first receiving electrode and the second receiving electrode, wherein the second piezoelectric material layer has a positive piezoelectric effect.

### Claim 7 (depends on 6)

The display substrate according to claim 6, wherein an orthographic projection of a pattern of the first piezoelectric material layer on the base substrate and an orthographic projection of a pattern of the second piezoelectric material layer on the base substrate at least partially overlap, wherein the pattern of the first piezoelectric material layer is in a section perpendicular to the base substrate, and the pattern of the second piezoelectric material layer is in a section perpendicular to the base substrate.

### Claim 8 (depends on 6)

The display substrate according to claim 6, wherein the first piezoelectric material layer comprises a piezoelectric crystal or a piezoelectric polymer film; and
the second piezoelectric material layer comprises a piezoelectric crystal or a piezoelectric polymer film.

### Claim 9 (depends on 1)

The display substrate according to claim 1, wherein the first light-emitting element comprises a first electrode and a second electrode arranged opposite to each other, and a first light-emitting layer located between the first electrode and the second electrode, and
wherein the second light-emitting element comprises a third electrode and a fourth electrode arranged opposite to each other, and a second light-emitting layer located between the third electrode and the fourth electrode.

### Claim 10 (depends on 9)

The display substrate according to claim 9, wherein the transmitter comprises a first transmitting electrode and a second transmitting electrode; and
wherein the first transmitting electrode is electrically coupled to the first electrode of the first light-emitting element, and the second transmitting electrode is electrically coupled to a first reference potential.

### Claim 11 (depends on 10)

The display substrate according to claim 10, further comprising: a thin film transistor arranged on the first side of the base substrate, and
wherein both the first transmitting electrode and the first electrode are electrically coupled to a source electrode of the thin film transistor, or both the first transmitting electrode and the first electrode are electrically coupled to a drain electrode of the thin film transistor.

### Claim 12 (depends on 9)

The display substrate according to claim 9, wherein the receiver comprises a first receiving electrode and a second receiving electrode, and
wherein the first receiving electrode is electrically coupled to the third electrode of the second light-emitting element, and the second receiving electrode is electrically coupled to a second reference potential.

### Claim 13 (depends on 1)

The display substrate according to claim 1, wherein the display substrate further comprises a compensation circuit, and wherein the compensation circuit is configured to compensate the conduction signal or the second display electrical signal, so that the second display electrical signal is substantially the same as the first display electrical signal.

### Claim 14 (depends on 13)

The display substrate according to claim 13, wherein the compensation circuit is arranged on the second side of the base substrate.

### Claim 15

A method for manufacturing a display substrate, comprising:
providing a base substrate having a first side and a second side opposite to each other;
forming a transmitter on the first side of the base substrate, wherein the transmitter is configured to convert a first display electrical signal into a conduction signal;
forming a first light-emitting element on a side of the transmitter away from the base substrate, wherein the first light-emitting element emits light under a driving action of the first display electrical signal;
forming a receiver on the second side of the base substrate, wherein the receiver is configured to receive the conduction signal and convert the conduction signal into a second display electrical signal; and
forming a second light-emitting element on a side of the receiver away from the base substrate, wherein the second light-emitting element emits light under a driving action of the second display electrical signal.

### Claim 16 (depends on 15)

The method according to claim 15, wherein forming a first light-emitting element on a side of the transmitter away from the base substrate comprises:
forming a first electrode of the first light-emitting element on a side of the transmitter away from the base substrate;
forming a first light-emitting layer of the first light-emitting element on a surface of the first electrode away from the base substrate; and
forming a second electrode of the first light-emitting element on a surface of the first light-emitting layer away from the base substrate.

### Claim 17 (depends on 1)

A display panel comprising the display substrate according to claim 1.

### Claim 18 (depends on 17)

A display device comprising the display panel according to claim 17.

### Claim 19 (depends on 16)

The method according to claim 16, wherein forming a second light-emitting element on a side of the receiver away from the base substrate comprises:
forming a third electrode of the second light-emitting element on a side of the receiver away from the base substrate;
forming a second light-emitting layer of the second light-emitting element on a surface of the third electrode away from the base substrate; and
forming a fourth electrode of the second light-emitting element on a surface of the second light-emitting layer away from the base substrate.

### Claim 20 (depends on 6)

The display substrate according to claim 6, wherein an orthographic projection of a pattern of the second piezoelectric material layer on the base substrate covers an orthographic projection of a pattern of the first piezoelectric material layer on the base substrate, wherein the pattern of the first piezoelectric material layer is in a section perpendicular to the base substrate, and the pattern of the second piezoelectric material layer is in a section perpendicular to the base substrate.