Panel vibration type sound generating display device

Patent metadata

Field	Value
Publication number	US-11736858-B2
Application number	US-202117228674-A
Country	US
Kind code	B2
Filing date	Apr 12, 2021
Priority date	Mar 28, 2016
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A panel vibration type sound generating display device is disclosed. The display device includes a display panel for displaying an image; a sound generating actuator connected to the display panel and configured to vibrate the display panel to generate sound; a support structure spaced apart from the display panel with an air gap between the support structure and the display panel; and a baffle part disposed between the support structure and the display panel to surround the air gap.

First claim

What is claimed is:

1. An apparatus, comprising;
a vibrating plate;
a sound generating actuator on a rear portion of the vibrating plate and configured to vibrate the vibrating plate to generate sound;
a support structure spaced apart from the vibrating plate with an air gap between the support structure and the vibrating plate;
a baffle part disposed between the support structure and the vibrating plate to surround the air gap;
another sound generating actuator; and
a reinforcement member extending between the sound generating actuator and the other sound generating actuator or extending through a space between the sound generating actuator and the other sound generating actuator, the reinforcement member being disposed apart from the sound generating actuator and the other sound generating actuator,
wherein the vibrating plate is configured to generate sound waves in the air gap when vibrated by the sound generating actuator.

2. The apparatus of claim 1 , wherein the support structure comprises a support hole to accommodate the sound generating actuator.

3. The apparatus of claim 1 , wherein the support structure is configured to cover and support the vibrating plate.

4. The apparatus of claim 1 , wherein the baffle part comprises an adhesive member.

5. The apparatus of claim 1 , further comprising:
a source printed circuit board (PCB) on the vibrating plate; and
a buffer member between the support structure and the source PCB.

6. The apparatus of claim 1 , wherein the sound generating actuator comprises:
a plate connected to the support structure;
a magnet disposed on the plate;
a center pole disposed at a center of the plate;
a bobbin surrounding the center pole and connected to the vibrating plate; and
a coil wound around the bobbin.

7. The apparatus of claim 6 , wherein the plate includes an extension part connected to an outer surface of the support structure.

8. The apparatus of claim 1 , wherein the support structure comprises:
a cover bottom covering the rear portion of the vibrating plate; and
a middle cabinet supporting a periphery of the vibrating plate, the middle cabinet comprising an area division member arranged to separate a space between the support structure and the vibrating plate into a first area and a second area, the first area including a source printed circuit board (PCB) and the second area including the sound generating actuator.

9. The apparatus of claim 1 , further comprising a source printed circuit board (PCB) on the vibrating plate,
wherein the support structure comprises:
a recessed part disposed in an inner surface of the support structure, the recessed part being disposed opposite the source PCB disposed on the vibrating plate; and
a first buffer member in the recessed part between the support structure and the source PCB.

10. The apparatus of claim 1 , further comprising a source printed circuit board (PCB) on the vibrating plate and configured to drive the vibrating plate,
wherein the support structure comprises a second buffer member in contact with both an inner surface of the support structure and the vibrating plate,
wherein the second buffer member is configured to separate a space between the support structure and the vibrating plate into a first area and a second area, and
wherein the first area includes the source PCB and the second area includes the sound generating actuator.

11. The apparatus of claim 1 , wherein the sound generating actuator and the other sound generating actuator are symmetrically arranged.

12. The apparatus of claim 1 , wherein the thickness of the air gap is from about 1.0 mm to 3.0 mm.

13. The apparatus of claim 1 , further comprising a sound compensation member.

14. The apparatus of claim 1 , wherein the air gap is provided in a predetermined portion around the sound generating actuator, and
wherein the baffle part is disposed at a periphery of the predetermined portion to surround the air gap in the predetermined portion.

15. The apparatus of claim 1 , wherein the sound generating actuator is configured to vibrate the vibrating plate to generate sound projecting in a direction coinciding with an image output direction of the vibrating plate to localize the output sound.

16. An apparatus, comprising:
a vibrating plate;
at least two sound generating actuators respectively disposed at different areas of the vibrating plate and respectively configured to vibrate the different areas of the vibrating plate to generate sound; and
a support structure on a rear surface of the vibrating plate,
wherein the support structure comprises a reinforcement member extending between two of the at least two sound generating actuators or extending through a space between two of the at least two sound generating actuators, the reinforcement member being disposed apart from each of the at least two sound generating actuators.

17. The apparatus of claim 16 , wherein the at least two sound generating actuators are configured to generate stereo sound.

18. The apparatus of claim 16 , wherein the at least two sound generating actuators are symmetrically arranged.

19. The apparatus of claim 16 , wherein the at least two sound generating actuators are configured to generate different vibrations from one another to generate different sounds in the different areas of the vibrating plate.

20. The apparatus of claim 16 , further comprising a baffle part at a rear portion of the vibrating plate separating one of the different areas from another of the different areas.

21. The apparatus of claim 16 , wherein the at least two sound generating actuators are configured to vibrate the vibrating plate to generate sound projecting in a direction coinciding with an image output direction of the vibrating plate to localize the output sound.

22. An apparatus, comprising:
a vibrating plate;
a sound generating actuator configured to vibrate the vibrating plate to generate sound;
a support structure covering a rear surface of the vibrating plate, with an air gap between the vibrating plate and the support structure;
an area division member at a rear portion of the vibrating plate and the support structure, the area division member dividing an area at the rear portion of the vibrating plate into a first area and a second area, and the first area including a source printed circuit board (PCB) and the second area including the sound generating actuator;
a baffle part disposed at a periphery of the second area between the support structure and the vibrating plate to surround the air gap in the second area;
another sound generating actuator; and
a reinforcement member extending between the sound generating actuator and the other sound generating actuator or extending through a space between the sound generating actuator and the other sound generating actuator, the reinforcement member being disposed apart from the sound generating actuator and the other sound generating actuator,
wherein the vibrating plate is configured to generate sound waves in the air gap in the second area when vibrated by the sound generating actuator.

23. The apparatus of claim 22 , wherein the sound generating actuator and the other sound generating actuator are symmetrically arranged.

24. The apparatus of claim 22 , further comprising a sound compensation member.

25. The apparatus of claim 22 , wherein the sound generating actuator is configured to vibrate the vibrating

Assignees

• Lg Display Co Ltd

Inventors

• CHOI YeongRak
• Oh Changho
• Park Kwanho
• Lee Sungtae

Classifications

• H04R1/323 Primary

  for loudspeakers (H04R1/34 and H04R1/40 take precedence) · CPC title

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G06F1/1605

  Multimedia displays, e.g. with integrated or attached speakers, cameras, microphones · CPC title

• H04R1/025

  Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture · CPC title

• H04R1/028 Primary

  associated with devices performing functions other than acoustics, e.g. electric candles · CPC title