Granted Patent B2

US 12,335,686 · App. 18/388,092 · Granted Jun 17, 2025

Inventors: YuSeon Kho (Paju-si, KR); Sooyoun Kim (Paju-si, KR)

Assignee: LG DISPLAY CO., LTD.

H04R17/00H04R2499/13H04R2499/15

Abstract

Claims (128)

1. An apparatus, comprising:

a vibration member;

a housing at a rear surface of the vibration member;

a vibration apparatus configured to vibrate the vibration member; and

a curvature variable layer between the vibration member and the vibration apparatus,

wherein the vibration member comprises:

at least one flat portion; and

at least one flexural portion adjacent to the at least one flat portion,

wherein the vibration apparatus comprises a vibration device,

wherein the vibration device comprises:

a vibration portion;

a first electrode portion at a first surface of the vibration portion; and

a second electrode portion at a second surface different from the first surface of the vibration portion,

wherein the vibration apparatus vibrates based on an alternating current (AC) vibration driving signal, and

wherein the curvature variable layer includes a piezoelectric material and maintains a contraction state or an expansion state based on a variable signal having a direct current (DC) voltage.

2. The apparatus of claim 1 , wherein the at least one flexural portion comprises one or more of at least one concave curved portion and at least one convex curved portion.

3. The apparatus of claim 2 , wherein:

the vibration member comprises a first region, a second region adjacent to the first region, and a third region adjacent to the second region, the first to the third regions having different bending states;

the first region comprises the at least one flat portion;

the second region comprises the at least one concave curved portion; and

the third region comprises the at least one convex curved portion.

4. The apparatus of claim 3 , further comprising:

at least one first vibration device at the first region;

at least one second vibration device at the second region; and

at least one third vibration device at the third region.

5. The apparatus of claim 4 , wherein:

the at least one first vibration device has a mechanical quality factor of less than 100;

the at least one third vibration device has a mechanical quality factor of more than 400; and

the at least one second vibration device has a mechanical quality factor in a range from 100 to 400.

6. The apparatus of claim 1 , wherein:

the curvature variable layer comprises:

a curvature variable portion; and

a protection member surrounding the curvature variable portion; and

the curvature variable portion contacts a second surface of the vibration member.

7. The apparatus of claim 6 , further comprising a curvature variable layer controller configured to provide a curvature variable signal to the curvature variable layer,

wherein the curvature variable layer controller comprises:

a first output terminal configured to output a first polarity signal; and

a second output terminal configured to output a second polarity signal,

wherein the first output terminal is electrically connected to the vibration member, and

wherein the second output terminal is electrically connected to the curvature variable portion.

8. The apparatus of claim 1 , wherein the housing comprises:

a bottom portion spaced apart from the vibration member; and

a lateral portion protruding toward the vibration member from a periphery portion of the bottom portion.

9. The apparatus of claim 1 , further comprising a connection member between the vibration member and the housing.

10. The apparatus of claim 1 , further comprising a demultiplexer configured to separate a same sound signal, applied to the vibration apparatus, into signals having different frequencies and including a filter.

11. The apparatus of claim 1 , wherein the vibration apparatus further comprises:

a first cover member at the first electrode portion; and

a second cover member at the second electrode portion.

12. The apparatus of claim 11 , wherein the vibration apparatus further comprises:

a first adhesive layer between the first cover member and the first electrode portion; and

a second adhesive layer between the second cover member and the second electrode portion.

13. The apparatus of claim 1 , wherein the vibration portion comprises an inorganic material portion having a piezoelectric characteristic.

14. The apparatus of claim 1 , wherein the vibration portion comprises:

a plurality of inorganic material portions having a piezoelectric characteristic; and

an organic material portion between the plurality of inorganic material portions.

15. The apparatus of claim 1 , wherein the vibration member comprises a metal material, or comprises a single nonmetal material or a composite nonmetal material of one or more of wood, rubber, plastic, glass, fiber, cloth, paper, a mirror, carbon, and leather.

16. The apparatus of claim 1 , wherein the vibration member comprises one or more of a display panel including a pixel configured to display an image, a light emitting diode lighting panel, an organic light emitting lighting panel, and an inorganic light emitting lighting panel.

17. The apparatus of claim 1 , wherein the vibration member comprises any one or more of a display panel including a pixel configured to display an image, a screen panel on which an image is to be projected from a display apparatus, a lighting panel, a signage panel, a vehicular interior material, a vehicular glass window, a vehicular exterior material, a building ceiling material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window, metal, wood, rubber, plastic, glass, fiber, cloth, paper, leather, carbon, and a mirror.

18. An apparatus, comprising:

a vibration member;

a housing at a rear surface of the vibration member;

a vibration apparatus configured to vibrate the vibration member; and

a curvature variable layer between the vibration member and the vibration apparatus,

wherein the vibration member comprises:

at least one flat portion; and

at least one concave curved portion or at least one convex curved portion provided adjacent to the at least one flat portion,

wherein the vibration member comprises first to fourth regions which do not overlap one another,

wherein the second region comprises the at least one flat portion,

wherein the first region and the fourth region comprise the at least one convex curved portion,

wherein the third region comprises the at least one concave curved portion,

wherein the vibration apparatus comprises a vibration device,

wherein the vibration device comprises:

a vibration portion;

a first electrode portion at a first surface of the vibration portion; and

a second electrode portion at a second surface different from the first surface of the vibration portion,

wherein the vibration apparatus vibrates based on an alternating current (AC) vibration driving signal, and

wherein the curvature variable layer includes a piezoelectric material and maintains a contraction state or an expansion state based on a variable signal having a direct current (DC) voltage.

19. The apparatus of claim 18 , wherein the vibration apparatus comprises:

at least one first vibration device at the second region;

at least one third vibration device at the first region and the fourth region; and

at least one second vibration device at the third region.

20. The apparatus of claim 19 , wherein:

the at least one first vibration device has a mechanical quality factor of less than 100;

the at least one third vibration device has a mechanical quality factor of more than 400; and

the at least one second vibration device has a mechanical quality factor in a range from 100 to 400.

21. An apparatus, comprising:

a vibration member;

a housing at a rear surface of the vibration member;

a vibration apparatus configured to vibrate the vibration member; and

a curvature variable layer between the vibration member and the vibration apparatus,

wherein the vibration member comprises:

at least one flat portion; and

at least one concave curved portion or at least one convex curved portion provided adjacent to the at least one flat portion,

wherein the vibration member comprises first to fourth regions which do not overlap one another,

wherein the second region comprises the at least one flat portion,

wherein the third region comprises the at least one convex curved portion,

wherein the first region and the fourth region comprise the at least one concave curved portion,

wherein the vibration apparatus comprises a vibration device,

wherein the vibration device comprises:

a vibration portion;

a first electrode portion at a first surface of the vibration portion; and

a second electrode portion at a second surface different from the first surface of the vibration portion,

wherein the vibration apparatus vibrates based on an alternating current (AC) vibration driving signal, and

wherein the curvature variable layer includes a piezoelectric material and maintains a contraction state or an expansion state based on a variable signal having a direct current (DC) voltage.

22. The apparatus of claim 21 , wherein the vibration apparatus comprises:

at least one first vibration device at the second region;

at least one third vibration device at the third region; and

at least one second vibration device at the first region and the fourth region.

23. The apparatus of claim 22 , wherein:

the at least one first vibration device has a mechanical quality factor of less than 100;

the at least one third vibration device has a mechanical quality factor of more than 400; and

the at least one second vibration device has a mechanical quality factor in a range from 100 to 400.

24. A vehicular apparatus, comprising:

an exterior material;

an interior material covering the exterior material; and

one or more vibration generating apparatuses at one or more among the exterior material, the interior material, and a region between the exterior material and the interior material,

wherein the one or more vibration generating apparatuses comprise the apparatus of claim 1 , and

wherein one or more of the interior material and the exterior material is configured to output sound based on vibrations of the one or more vibration generating apparatuses.

25. The vehicular apparatus of claim 24 , wherein the interior material comprises one or more of metal, plastic, fiber, leather, wood, cloth, rubber, carbon, a mirror, and paper.

26. The vehicular apparatus of claim 24 , wherein:

the interior material comprises one or more of a dashboard, a pillar interior material, a roof interior material, a door interior material, a seat interior material, a handle interior material, a floor interior material, a rear view mirror, an overhead console, a glove box, a sun visor, and a rear package interior material; and

the one or more vibration generating apparatuses are configured to vibrate at least one or more of the dashboard, the pillar interior material, the roof interior material, the door interior material, the seat interior material, the handle interior material, the floor interior material, the rear view mirror, the overhead console, the glove box, the sun visor, and the rear package interior material.

27. The vehicular apparatus of claim 24 , further comprising:

a glass window; and

a transparent vibration generating apparatus at the glass window.

28. The vehicular apparatus of claim 27 , wherein:

the glass window comprises at least one or more of a front glass window, a side glass window, a rear glass window, and a roof glass window; and

the transparent vibration generating apparatus is configured to vibrate at least one or more of the front glass window, the side glass window, the rear glass window, and the roof glass window.

Priority Claims (1)

Continuity (2)

References Cited (32)