Panel vibration type sound generating display device

• US 10,237,656 B2
• Filed: 03/28/2017
• Issued: 03/19/2019
• Est. Priority Date: 03/28/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Sungtae, Choi, YeongRak
• Primary Examiner(s): Paul, Disler
• Application Number:
  US15/471,173
• Publication Number:
  US 20170280216A1
• Time in Patent Office: 721 Days
• Field of Search: 381333, 381306
• 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 having first, second, and third areas; at least three sound generating actuators including first, second, and third actuators each spaced apart from the other two in a long axis direction of the display panel, wherein the first, second, and third actuators each contact the display panel at the first, second, and third areas, respectively, to generate sound by vibrating the display panel; and a support structure at a rear side of the display panel configured to support the at least three sound generating actuators.

Claims

1. A display device, comprising:

a display panel having first, second, and third areas;

at least three sound generating actuators including first, second, and third actuators each spaced apart from the other two in a long axis direction of the display panel, wherein the first, second, and third actuators each directly contact the display panel at the first, second, and third areas, respectively, to generate sound by vibrating the display panel;

a support structure at a rear side of the display panel configured to support the at least three sound generating actuators;

a first partition configured to separate the first and the second areas; and

a second partition configured to separate the second and the third areas,

wherein each of the first partition and the second partition includes a bent portion bent toward the second actuator, and an end position of the bent portion is disposed on a line in the long axis direction that passes through a center of the second actuator.

2. The display device of claim 1, wherein the first partition extends in a direction crossing the long axis direction and contacts at least one of the display panel and the support structure.

3. The display device of claim 1, wherein each of the first partition and the second partition extends in a direction crossing the long axis direction and has a height larger than or equal to a gap between the support structure and the display panel such that each of the first partition and the second partition contacts the display panel and the support structure.

4. The display device of claim 1, wherein the second area includes a central portion of the display device and the central portion is larger than each of the first and third areas.

5. The display device of claim 4, wherein the first and third areas are respectively to the right and to the left of the second area.

6. The display device of claim 1, wherein a threshold frequency of a low frequency range of the second actuator is lower than a threshold frequency of a low frequency range of each of the first actuator and the third actuator.

7. The display device of claim 1, wherein each of the first partition and the second partition is arranged in a zigzag form.

8. The display device of claim 1, further comprising a metal plate disposed adjacent to the second actuator.

9. The display device of claim 8, wherein the metal plate is configured to conduct heat from the second actuator and is attached to a portion of the display panel in the second area.

10. The display device of claim 1, wherein the first partition and the second partition are disposed between the support structure and the display panel, and wherein the first partition and the second partition are bonded to at least the support structure.

11. The display device of claim 1, further comprising a baffle disposed to surround each of the first, second, and third actuators with the first and second partitions to define first, second, and third spaces respectively around first, second, and third actuators.

12. The display device of claim 11, wherein the baffle includes at least one of an adhesive portion and a sealing portion.

13. The display device of claim 1, wherein the support structure includes first, second, and third support holes into which the first, second, and third actuators are respectively inserted such that the first, second, and third actuators are fixed to the support structure.

14. A display device, comprising:

a display panel having first, second, and third areas;

at least three sound generating actuators including first, second, and third actuators each spaced apart from the other two in a long axis direction of the display panel, wherein the first, second, and third actuators each directly contact the display panel at the first, second, and third areas, respectively, to generate sound by vibrating the display panel;

a support structure at a rear side of the display panel configured to support the at least three sound generating actuators;

a first partition configured to separate the first and the second areas; and

a second partition configured to separate the second and the third areas,

wherein at least three sound generating actuators further includes fourth and fifth actuators respectively disposed in the first and third areas,

wherein the fourth actuator is below the first actuator, and wherein the fifth actuator is below the third actuator,

wherein the first partition includes a first bent portion bent toward the first actuator, a second bent portion bent toward the second actuator, and a third bent portion bent toward the fourth actuator.

15. The display device of claim 14, wherein the first partition is arranged in a zigzag form such that the end position of the first bent portion is directed to the first actuator, the end position of the second bent portion is directed toward the second actuator, and the end position of the third bent portion is directed toward the fourth actuator.

16. The display device of claim 15, wherein the second partition includes a fourth bent portion bent toward the third actuator, a fifth bent portion bent toward the second actuator, and a sixth bent portion bent toward the fifth actuator, and

wherein the second partition is arranged in a zigzag form such that the end position of the fourth bent portion is directed to the third actuator, the end position of the fifth bent portion is directed toward the second actuator, and the end position of the sixth bent portion is directed toward the fifth actuator.

17. The display device of claim 14, wherein the at least three sound generating actuators further includes a sixth actuator disposed in the second area.