Display device for generating sound by vibrating panel

• US 10,219,079 B2
• Filed: 03/28/2017
• Issued: 02/26/2019
• Est. Priority Date: 03/28/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, YeongRak, Lee, Sungtae
• Primary Examiner(s): Paul, Disler
• Application Number:
  US15/471,184
• Publication Number:
  US 20170280217A1
• Time in Patent Office: 700 Days
• Field of Search: 381333
• CPC Class Codes: H04N 5/642 Disposition of sound reproducers
• CPC Class Codes: H04R 1/025 Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
• CPC Class Codes: H04R 1/028 associated with devices performing functions other than acoustics, e.g. electric candles
• CPC Class Codes: H04R 1/26 Spatial arrangements of separate transducers responsive to two or more frequency ranges
• CPC Class Codes: H04R 1/288 for loudspeaker transducers
• CPC Class Codes: H04R 11/02 Loudspeakers
• CPC Class Codes: H04R 2307/023 Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
• CPC Class Codes: H04R 2307/025 Diaphragms comprising polymeric materials
• CPC Class Codes: H04R 2400/03 Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
• CPC Class Codes: H04R 2440/05 Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
• CPC Class Codes: H04R 2499/15 Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
• CPC Class Codes: H04R 3/14 Cross-over networks
• CPC Class Codes: H04R 5/02 Spatial or constructional arrangements of loudspeakers
• CPC Class Codes: H04R 5/023 in a chair, pillow
• CPC Class Codes: H04R 7/045 using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
• CPC Class Codes: H04R 9/025 Magnetic circuit
• CPC Class Codes: H04R 9/06 Loudspeakers
• CPC Class Codes: H04R 9/066 using the principle of inertia

Abstract

A display device includes a display panel; a support structure at a rear of the display panel; a sound generation actuator supported by the support structure and configured to vibrate the display panel to generate sound; and a cap member surrounding the sound generation actuator and secured to the support structure at an area of the support structure, the area being near the sound generation actuator.

Claims

1. A display device, comprising:

a display panel configured to emit light;

a support structure at a rear of the display panel;

a sound generation actuator supported by the support structure and configured to vibrate the display panel to generate sound; and

a cap member surrounding the sound generation actuator and secured to the support structure at an area of the support structure, the area being near the sound generation actuator and wherein the sound generation actuator includes a lower plate, a magnet disposed on the lower plate, a center pole disposed on the central region of the lower plate, a bobbin disposed to surround the center pole, and a coil wound around the bobbin.

2. The display device of claim 1, wherein the sound generation actuator is positioned through the support structure such that an end of the sound generation actuator contacts the display panel.

3. The display device of claim 1, further comprising a heat dissipation member in contact with an inner surface of the cap member and a rear of the sound generation actuator.

4. The display device of claim 3, further comprising a damping member between an edge of the cap member and a rear of the support structure.

5. The display device of claim 1, wherein a hole is defined on one side of the cap member.

6. The display device of claim 5, wherein the hole is defined in upper and lower positions with respect to the position in which the display device is installed.

7. The display device of claim 1, wherein the cap member includes a round portion with a curved surface.

8. The display device of claim 1, further comprising a sound-absorbing layer on the inner surface of the cap member.

9. The display device of claim 1, further comprising a self-clinching nut secured to the support structure, wherein the sound generation actuator and the cap member are secured to the support structure by the self-clinching nut and a fixing bolt.

10. The display device of claim 1, further comprising a second sound generation actuator and a second cap member, wherein the cap member and the second cap member respectively surround the sound generation actuator and the second sound generation actuator.

11. The display device of claim 10, wherein the second cap member is secured to the support structure at a second area of the support structure, the second area being near the second sound generation actuator.

12. A display device for generating a sound by vibrating a panel, comprising:

a display panel configured to emit light;

a cover bottom configured to cover and support at least a rear of the display panel, the cover bottom having a support hole defined therethrough;

a sound generation actuator positioned in the support hole with the sound generation actuator contacting the display panel such that the sound generation actuator is configured to vibrate the display panel to generate sound; and

a cap member secured to and surrounding an outer peripheral portion of the sound generation actuator and wherein the sound generation actuator includes a lower plate, a magnet disposed on the lower plate, a center pole disposed on the central region of the lower plate, a bobbin disposed to surround the center pole, and a coil wound around the bobbin.

13. The display device of claim 12, wherein the cap member is secured to the cover bottom at an area of the cover bottom, the area being near the support hole.

14. A display device, comprising:

a display panel configured to emit light;

a support structure at a rear of the display panel;

a baffle part between the support structure and the display panel;

a sound generation actuator supported by the support structure and configured to vibrate the display panel to generate sound; and

a cap member at a rear of the sound generation actuator and wherein the sound generation actuator includes a lower plate, a magnet on the lower plate, a center pole on the central region of the lower plate, a bobbin surrounding the center pole, and a coil wound around the bobbin.

15. The display device of claim 14, wherein the cap member is secured to the support structure at an area near the sound generation actuator.

16. The display device of claim 14, wherein the support structure includes a support hole to accommodate the sound generating actuator.

17. The display device of claim 14, wherein the support structure comprises:

a cover bottom supporting and covering a rear side of the display panel; and

a middle cabinet supporting an edge of the display panel.