# US 11,910,158 B2 · Vibration device and apparatus including the same

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- Number: US 11,910,158 B2
- Document ID: US11910158B2
- Status: Granted
- Kind: B2
- Application number: 17/555,091
- Filed: 2021-12-17
- Published: 2022-06-30
- Granted: 2024-02-20
- Earliest claimed: 2020-12-31
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: YoungWook Ha; SeungRyull Park; Chiwan Kim; Sungwook Ko
- Web page: https://patentgrep.com/patent/US11910158B2

## CPC

- H04R 17/00: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00})
- H04R 17/005: {using a piezoelectric polymer}
- H10N 30/852: {Composite materials, e.g. having 1-3 or 2-2 type connectivity}
- H10N 30/877: {Conductive materials}
- H10N 30/883: {Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings}
- H04R 7/04: Plane diaphragms
- H04R 2499/13: Acoustic transducers and sound field adaptation in vehicles
- H04R 2499/15: Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A vibration device can include a vibration portion; a first electrode portion disposed on a first surface of the vibration portion; and a second electrode portion disposed on a second surface of the vibration portion, in which each of the first and second electrode portions include at least one of a conductive metal particle and a carbon particle.

## Claims

### Claim 1

A vibration device, comprising:
a vibration portion;
a first electrode portion disposed on a first surface of the vibration portion; and
a second electrode portion disposed on a second surface of the vibration portion,
wherein each of the first and second electrode portions includes a piezoelectric nanoparticle and at least one of a conductive metal particle and a carbon particle.

### Claim 2 (depends on 1)

The vibration device of claim 1, wherein each of the first electrode portion and the second electrode portion is configured as a single layer, and
each of the first electrode portion and the second electrode portion includes a conductive metal nanoparticle.

### Claim 3 (depends on 2)

The vibration device of claim 2, wherein the conductive metal nanoparticle includes at least one or more of silver (Ag), gold (Au), platinum (Pt), and copper (Cu).

### Claim 4 (depends on 2)

The vibration device of claim 2, wherein the conductive metal nanoparticle has a particle size less than or equal to 1 μm.

### Claim 5 (depends on 1)

The vibration device of claim 1, wherein at least one of the first electrode portion and the second electrode portion includes:
a first layer disposed adjacent to the vibration portion, the first layer including a carbon particle; and
a second layer disposed on the first layer, the second layer including a conductive metal flake particle.

### Claim 6 (depends on 5)

The vibration device of claim 5, wherein the conductive metal flake particle includes at least one or more of silver (Ag), gold (Au), platinum (Pt), and copper (Cu).

### Claim 7 (depends on 5)

The vibration device of claim 5, wherein the conductive metal flake particle has a particle size of 1 μm to 10 μm.

### Claim 8 (depends on 5)

The vibration device of claim 5, wherein the carbon particle includes at least one of a carbon nanoparticle and a carbon flake particle.

### Claim 9 (depends on 8)

The vibration device of claim 8, wherein the carbon nanoparticle has a size of approximately 10 nm to 500 nm, and
the carbon flake particle has a particle size of approximately 1 μm to 10 μm.

### Claim 10 (depends on 1)

The vibration device of claim 1, wherein the vibration portion includes:
a plurality of inorganic vibration portions, each of the plurality of inorganic vibration portions including a piezoelectric material; and
an organic vibration portion disposed between at least two of the plurality of inorganic vibration portions.

### Claim 11 (depends on 10)

The vibration device of claim 10, wherein the organic vibration portion includes at least one of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material.

### Claim 12 (depends on 1)

The vibration device of claim 1, further comprising:
a first protective member disposed on the first surface of the vibration portion; and
a second protective member disposed on the second surface of the vibration portion.

### Claim 13 (depends on 1)

An apparatus, comprising:
a vibration object; and
a vibration generating device disposed on one surface of the vibration object,
wherein the vibration generating device includes the vibration device of claim 1.

### Claim 14 (depends on 13)

The apparatus of claim 13, wherein the vibration object includes at least one or more of a display panel having pixels configured to display an image, a screen panel on which an image is projected from a display apparatus, a lighting panel, a vibrating plate, wood, plastic, glass, cloth, an interior material of a vehicle, a glass window of a vehicle, an interior ceiling of a building, a glass window of a building, an interior material of aircraft, and a glass window of aircraft.

### Claim 15

A vibration device, comprising:
a vibration portion;
a first electrode portion disposed on a first surface of the vibration portion; and
a second electrode portion disposed on a second surface of the vibration portion,
wherein each of the first and second electrode portions includes at least one of a conductive metal particle and a carbon particle,
wherein the vibration portion includes:
a plurality of inorganic vibration portions, each of the plurality of inorganic vibration portions including a piezoelectric material; and
an organic vibration portion disposed between at least two of the plurality of inorganic vibration portions,
wherein each of the first electrode portion and the second electrode portion is configured as a single layer, and
wherein each of the first electrode portion and the second electrode portion includes a conductive metal nanoparticle and a piezoelectric nanoparticle.

### Claim 16 (depends on 15)

The vibration device of claim 15, wherein the piezoelectric nanoparticle includes a same material as the inorganic vibration portion, and
the piezoelectric nanoparticle has a particle size less than 1 μm.

### Claim 17 (depends on 15)

The vibration device of claim 15, wherein the conductive metal nanoparticle includes at least one or more of silver (Ag), gold (Au), platinum (Pt), and copper (Cu), and
the conductive metal nanoparticle has a particle size less than 1 μm.

### Claim 18 (depends on 15)

The vibration device of claim 15, wherein the organic vibration portion includes at least one of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material.

### Claim 19 (depends on 15)

The vibration device of claim 15, further comprising:
a first protective member disposed at a front surface of the vibration device; and
a second protective member disposed at a rear surface of the vibration device.

### Claim 20

A vibration device, comprising:
a vibration portion;
a first electrode portion disposed on a first surface of the vibration portion; and
a second electrode portion disposed on a second surface of the vibration portion,
wherein each of the first and second electrode portions includes at least one of a conductive metal particle and a carbon particle,
wherein the vibration portion includes:
a plurality of inorganic vibration portions, each of the plurality of inorganic vibration portions including a piezoelectric material; and
an organic vibration portion disposed between at least two of the plurality of inorganic vibration portions, and
wherein the first electrode portion includes:
a first layer disposed adjacent to the vibration portion, the first layer including a carbon particle and a piezoelectric nanoparticle; and
a second layer disposed at the first layer, the second layer including a conductive metal flake particle.

### Claim 21 (depends on 20)

The vibration device of claim 20, wherein the piezoelectric nanoparticle includes a same material as the inorganic vibration portion, and
the piezoelectric nanoparticle has a particle size less than 1 μm.

### Claim 22 (depends on 20)

The vibration device of claim 20, wherein the conductive metal flake particle includes at least one or more of silver (Ag), gold (Au), platinum (Pt), and copper (Cu), and
the conductive metal flake particle has a particle size of 1 μm to 10 μm.

### Claim 23 (depends on 20)

The vibration device of claim 20, wherein the carbon particle includes at least one of a carbon nanoparticle and a carbon flake particle,
the carbon nanoparticle has a size of approximately 10 nm to 500 nm, and
the carbon flake particle has a particle size of approximately 1 μm to 10 μm.

### Claim 24 (depends on 20)

The vibration device of claim 20, wherein the organic vibration portion includes at least one of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material.

### Claim 25 (depends on 20)

The vibration device of claim 20, further comprising:
a first protective member disposed at a front surface of the vibration device; and
a second protective member disposed at a rear surface of the vibration device.

### Claim 26

A vibration device, comprising:
a vibration portion;
a first electrode portion disposed on a first surface of the vibration portion; and
a second electrode portion disposed on a second surface of the vibration portion,
wherein each of the first and second electrode portions includes at least one of a conductive metal particle and a carbon particle,
wherein the vibration portion includes:
a plurality of inorganic vibration portions, each of the plurality of inorganic vibration portions including a piezoelectric material; and
an organic vibration portion disposed between at least two of the plurality of inorganic vibration portions,
wherein at least one of a first layer of the first electrode portion and a first layer of the second electrode portion includes:
a first portion overlapping with at least one of the plurality of inorganic vibration portion; and
a second portion overlapping with the organic vibration portion,
wherein the first portion includes at least one of a carbon particle and a piezoelectric nanoparticle, and
the second portion includes at least one of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material.

### Claim 27 (depends on 26)

The vibration device of claim 26, wherein the second electrode portion includes a second layer disposed at the first layer of the second electrode portion,
wherein the first layer of the second electrode portion is disposed adjacent to the vibration portion and includes a carbon particle and a piezoelectric nanoparticle, and
the second layer includes a conductive metal flake particle.

### Claim 28 (depends on 27)

The vibration device of claim 27, wherein the piezoelectric nanoparticle includes a same material as the inorganic vibration portion, and the piezoelectric nanoparticle has a particle size less than 1 μm.

### Claim 29 (depends on 27)

The vibration device of claim 27, wherein the conductive metal flake particle includes at least one or more of silver (Ag), gold (Au), platinum (Pt), and copper (Cu), and
the conductive metal flake particle has a particle size of 1 μm to 10 μm.

### Claim 30 (depends on 27)

The vibration device of claim 27, wherein the carbon particle includes at least one of a carbon nanoparticle and a carbon flake particle,
the carbon nanoparticle has a size of approximately 10 nm to 500 nm, and
the carbon flake particle has a particle size of approximately 1 μm to 10 μm.

### Claim 31 (depends on 26)

The vibration device of claim 26, wherein the organic vibration portion includes at least one of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material.

### Claim 32 (depends on 26)

The vibration device of claim 26, further comprising:
a first protective member disposed at a front surface of the vibration device; and
a second protective member disposed at a rear surface of the vibration device.

### Claim 33

A vibration device, comprising:
a first electrode portion;
a first vibration portion disposed on a rear surface of the first electrode portion;
a third electrode portion disposed on a rear surface of the first vibration portion;
a second vibration portion disposed on a rear surface of the third electrode portion; and
a second electrode portion disposed on a rear surface of the second vibration portion,
wherein the first vibration portion and the second vibration portion have mutually opposite poling directions, and
wherein each of the first electrode portion and the second electrode portion includes a piezoelectric nanoparticle.

### Claim 34 (depends on 33)

The vibration device of claim 33, wherein at least one of the first electrode portion and the second electrode portion includes:
a first layer disposed adjacent to a front surface of the first vibration portion, the first layer including a carbon particle; and
a second layer disposed at the first layer, the second layer including a conductive metal flake particle.

### Claim 35 (depends on 33)

The vibration device of claim 33, wherein the third electrode portion includes:
a first layer disposed adjacent to the rear surface of the first vibration portion;
a third layer disposed adjacent to a front surface of the second vibration portion; and
a second layer disposed between the first layer and the third layer,
wherein each of the first layer and the third layer includes a carbon particle, and
the second layer includes a conductive metal flake particle.

### Claim 36 (depends on 33)

The vibration device of claim 33, wherein the vibration portion includes:
a plurality of inorganic vibration portions, each of the plurality of inorganic vibration portions including a piezoelectric material; and
an organic vibration portion disposed between two of the plurality of inorganic vibration portions.

### Claim 37 (depends on 36)

The vibration device of claim 36, wherein the organic vibration portion includes at least one of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material.

### Claim 38 (depends on 33)

The vibration device of claim 33, further comprising:
a first protective member disposed at a front surface of the vibration device; and
a second protective member disposed at a rear surface of the vibration device.