Panel vibration type sound generating display device

Patent metadata

Field	Value
Publication number	US-10555073-B2
Application number	US-201815987267-A
Country	US
Kind code	B2
Filing date	May 23, 2018
Priority date	Mar 28, 2016
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

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. A panel vibration type sound generating display device comprising:
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,
wherein the support structure comprises:
a cover bottom covering a rear side of the display panel; and
a middle cabinet supporting an edge of the display panel, the middle cabinet comprising an area division member arranged to separate a space between the support structure and the display panel into a first area behind one portion of the display panel and a second area behind another portion of the display panel, the first area including a source printed circuit board (PCB) and the second area including the sound generating actuator.

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

3. The display device of claim 1 , wherein the support structure is configured to cover and support the display panel.

4. The display device of claim 1 , wherein the baffle part comprises at least one of an adhesive member and a sealing part disposed outside of the adhesive member.

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

6. The display device 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 display panel; and
a coil wound around the bobbin.

7. The display device of claim 6 , wherein the plate includes an extension part connected to an exterior surface of the support structure.

8. The display device of claim 1 , further comprising a source printed circuit board (PCB) disposed on the display panel,
wherein the support structure comprises:
a recessed part located in an interior surface of the support structure, the recessed part being located opposite the source PCB disposed on the display panel; and
a first buffer member disposed in the recessed part between the support structure and the source PCB.

9. The display device of claim 1 , further comprising a source printed circuit board (PCB) on the display panel and configured to drive the display panel,
wherein the support structure comprises a second buffer member in contact with both the interior surface of the support structure and the display panel, the second buffer member separating a space between the support structure and the display panel into a first area and a second area, the first area including the source PCB and the second area including the sound generating actuator.

10. The display device of claim 1 , wherein the support structure is a cover bottom of the display device.

11. The display device of claim 1 , wherein the thickness of the air gap is from about 1.0 mm to 3.0 mm.

12. The display device of claim 1 , further comprising a sound compensation member.

13. The display device of claim 1 , wherein the air gap is provided in a predetermined section around the sound generating actuator, and
wherein the baffle part is disposed at an edge of the predetermined section to surround the air gap in the predetermined section.

14. The display device of claim 1 , wherein the sound generating actuator is configured to vibrate the display panel to generate sound projecting in a direction coinciding with an image output direction of the display panel to localize the output sound.

15. The display device of claim 1 , wherein the display device further comprises another sound generating actuator, and
wherein the two sound generating actuators are symmetrically arranged, and the support structure further comprises a reinforcement member extending between the two sound generating actuators.

Assignees

• Lg Display Co Ltd

Inventors

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

Classifications

• G02F1/1333 Primary

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

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• H04R1/323 Primary

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

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title