Actuator fixing device and panel vibration type sound-generating display device including the same

• US 10,412,500 B2
• Filed: 03/28/2017
• Issued: 09/10/2019
• Est. Priority Date: 03/28/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Sungtae, Park, KwanHo, Choi, YeongRak, Kim, Kwangho, Bae, MyungJin
• Primary Examiner(s): Goins, Davetta W
• Assistant Examiner(s): Sellers, Daniel R
• Application Number:
  US15/471,164
• Publication Number:
  US 20170280215A1
• Time in Patent Office: 896 Days
• Field of Search: 381152
• 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

Provided are an actuator fixing device and a panel vibration type sound-generating display device including the same. A display device includes: a display panel configured to display an image, a cover bottom configured to cover the display panel, and a plurality of sound-generating actuators supported by the cover bottom, the sound-generating actuators being configured to vibrate the display panel to generate sound, at least two of the sound-generating actuators being adjacent to each other.

Claims

1. A display device, comprising:

a display panel configured to display an electronic image, the display panel including a rear side;

a cover bottom configured to cover the rear side of the display panel;

a plurality of sound-generating actuators fixed to and supported by the cover bottom, the plurality of sound-generating actuators being configured to directly contact and directly vibrate the display panel to generate sound; and

an actuator fixing device configured to support a first actuator and a second actuator, among the plurality of sound-generating actuators, to be at a certain distance from each other,

wherein the actuator fixing device comprises;

a first support part configured to support the first actuator,

a second support part configured to support the second actuator, and

a reinforcing rib part adjacent to the first support part and to the second support part, and

wherein the reinforcing rib part comprises;

a first longitudinal rib part extending in a longitudinal direction at an outer periphery of the first support part and the second support part,

a second longitudinal rib part connecting the first support part and the second support part in the longitudinal direction, and

a transverse rib part extending perpendicularly to the second longitudinal rib part.

2. The display device of claim 1, wherein the actuator fixing device is further configured to fix the plurality of sound-generating actuators to the cover bottom.

3. The display device of claim 1, wherein the reinforcing rib part comprises one or more diagonal rib parts that extend diagonally relative to a side of the display panel.

4. The display device of claim 1, wherein:

each of the first support part and the second support part supports a part of the rear surface and a side surface of the first actuator and the second actuator; and

the central portions of the rear surfaces of the first actuator and the second actuator are exposed to the outside of the actuator fixing device.

5. The display device of claim 1, wherein a distance between the first support part and the second support part is smaller than a size of the first actuator or a size of the second actuator.

6. The display device of claim 1, further comprising:

a self-clinching nut fixed to the cover bottom,

wherein the actuator fixing device further comprises a plurality of mounting holes for fixing the actuator fixing device to the cover bottom, and

wherein the actuator fixing device is fixed to the self-clinching nut by a fixing bolt in the mounting hole.

7. The display device of claim 1, wherein the sound-generating actuator comprises:

a lower plate;

a magnet on the lower plate;

a center pole at the center of the lower plate;

a bobbin surrounding the center pole; and

a coil wound around the bobbin.

8. An apparatus, comprising:

a display panel configured to display an electronic image, the display panel including a rear side;

a plurality of sound-generating actuators configured to directly contact and directly vibrate the display panel to generate sound;

a cover bottom configured to cover the rear side of the display panel, the plurality of sound-generating actuators being fixed to and supported by the cover bottom; and

an actuator fixing device for fixing at least two of the sound-generating actuators to the cover bottom

wherein the actuator fixing device comprises;

a first support part configured to support a first actuator among the at least two of the sound-generating actuators,

a second support part configured to support a second actuator among the at least two of the sound-generating actuators, and

a reinforcing rib part adjacent to the first support part and to the second support part, and

wherein the reinforcing rib part comprises;

a first longitudinal rib part extending in a longitudinal direction at an outer periphery of the first support part and the second support part,

a second longitudinal rib part connecting the first support part and the second support part in the longitudinal direction, and

a transverse rib part extending perpendicularly to the second longitudinal rib part.

9. The apparatus of claim 8, wherein the at least two of the sound-generating actuators are at least partially between the display panel and the actuator fixing device.

10. The apparatus of claim 9, wherein the actuator fixing device further comprises a plurality of mounting holes for fixing the actuator fixing device to the cover bottom.

11. The apparatus of claim 9, wherein a distance between first actuator and the second actuator is smaller than a size of the first actuator or a size of the second actuator.

12. The apparatus of claim 8, wherein the reinforcing rib part further comprises one or more diagonal rib parts that extend diagonally relative to a side of the display panel.

13. The apparatus of claim 8, wherein:

each of the first support part and the second support part supports a part of the rear surface and a side surface of a first actuator and a second actuator; and

the central portions of the rear surfaces of the first actuator and the second actuator are exposed to the outside of the actuator fixing device.

14. The apparatus of claim 8, wherein a distance between the first support part and the second support part is smaller than a size of the first actuator or a size of the second actuator.

15. An apparatus, comprising:

a display panel configured to display an electronic image, the display panel including a rear side;

a cover bottom configured to cover the rear of the display panel;

a plurality of sound-generating actuators fixed to the cover bottom and configured to directly contact and directly vibrate the display panel to generate sound; and

a reinforcing rib part configured to maintain a distance between at least two of the sound-generating actuators,

wherein the reinforcing rib part comprises;

a first longitudinal rib part extending in a longitudinal direction at an outer periphery of a first support part configured to support a first actuator among the at least two of the sound-generating actuators and a second support part configured to support a second actuator among the at least two of the sound-generating actuators,

a second longitudinal rib part connecting the first support part and the second support part in the longitudinal direction, and

a transverse rib part extending perpendicularly to the second longitudinal rib part.

16. The apparatus of claim 15, wherein the reinforcing rib part further comprises one or more diagonal rib parts that extend diagonally relative to a side of the display panel.

17. An apparatus, comprising:

a display panel configured to display an image;

a plurality of sound-generating actuators configured to vibrate the display panel to generate sound; and

a reinforcing rib part configured to maintain a distance between at least two of the sound-generating actuators,

wherein the reinforcing rib part comprises;

a first longitudinal rib part extending in a longitudinal direction;

a second longitudinal rib part in the longitudinal direction; and

a transverse rib part extending perpendicularly to the second longitudinal rib part.

18. An apparatus, comprising:

a display panel configured to display an electronic image, the display panel including a rear side;

a cover bottom configured to cover the rear side of the display panel;

a plurality of sound-generating actuators fixed to the cover bottom and configured to directly contact and directly vibrate the display panel to generate sound, the plurality of sound-generating actuators including at least a first sound-generating actuator and a second sound-generating actuator; and

a reinforcing rib part configured to maintain a distance between the first sound-generating actuator and the second sound-generating actuator,

wherein the reinforcing rib part comprises;

a first longitudinal rib part extending in a longitudinal direction,

a second longitudinal rib part in the longitudinal direction, and

a transverse rib part extending perpendicularly to the second longitudinal rib part.

19. The apparatus of claim 18, wherein the distance between the first sound-generating actuator and the second sound-generating actuator is less than 28 mm.

20. The apparatus of claim 18, wherein the first sound-generating actuator and the second sound-generating actuator are configured to receive a same control signal for vibrating the display panel.

21. The apparatus of claim 18, wherein the reinforcing rib part comprises one or more diagonal rib parts that extend diagonally relative to a side of the display panel.