Panel vibration type sound generating display device

• US 10,129,646 B2
• Filed: 03/28/2017
• Issued: 11/13/2018
• Est. Priority Date: 03/28/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, YeongRak, Park, KwanHo, Lee, Sungtae
• Primary Examiner(s): Paul, Disler
• Application Number:
  US15/471,458
• Publication Number:
  US 20170280243A1
• Time in Patent Office: 595 Days
• Field of Search: 381306, 381333, 381388, 381396, 381406, 381191, 381403, 381405, 381407
• 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

Disclosed is a display device that includes a display panel, sound generating actuators including a first sound generating actuator in a first area of the display panel and a second sound generating actuator in a second area of the display panel, the first and second sound generating actuators configured to vibrate the display panel to generate sound, and a partition between the first sound generating actuator and the second sound generating actuator.

Claims

1. A display device, comprising:

a display panel to emit light;

sound generating actuators including a first sound generating actuator in a first area of the display panel and a second sound generating actuator in a second area of the display panel, the first and second sound generating actuators configured to vibrate the display panel to generate sound;

a partition between the first sound generating actuator and the second sound generating actuator; and

a support portion configured to support a rear portion of the display panel,

wherein the first or second sound generating actuator is inserted into a support hole provided in the support portion to be fixed to the support portion, and

wherein the first or second sound generating actuator includes at least one of a lower plate inserted into the support hole, a magnet on the lower plate, a center pole at a center of the lower plate, a bobbin to surround a periphery of the center pole and having a tip end in contact with the display panel, and a coil wound around an outer periphery of the bobbin.

2. The display device according to claim 1, wherein the partition separates sound between the first and second areas.

3. The display device according to claim 1, wherein the partition is in contact with the display panel and the support portion.

4. The display device according to claim 1, wherein the partition extends in a vertical direction of the display panel.

5. The display device according to claim 1, wherein the sound generating actuator includes each of:

the lower plate;

the magnet on the lower plate;

the center pole at the center of the lower plate;

the bobbin surrounding the center pole; and

the coil wound around the bobbin.

6. The display device of claim 1, wherein a distance between the partition and the first sound generating actuator or the second sound generating actuator is 100 mm or more.

7. The display device of claim 1, wherein the support portion includes a cover bottom, the partition is between an upper surface of the cover bottom and a lower surface of the display panel, and the partition is bonded to at least the upper surface of the cover bottom.

8. The display device of claim 7, wherein the partition is in contact with the lower surface of the display panel in a non-adhesion structure.

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

baffles that respectively surround a periphery of the first sound generating actuator and the second sound generating actuator to form first and second spaces around the first sound generating actuator and the second sound generating actuator together with the partition.

10. The display device of claim 9, wherein the first sound generating actuator is at a center of a left and right length of the first space, and the second sound generating actuator is at a center of a left and right length of the second space.

11. The display device of claim 10, wherein the first sound generating actuator is at a center of a vertical length of the first space, and the second sound generating actuator is at a center of a vertical length of the second space.

12. The display device of claim 1, wherein the partition has a multi-wall structure including first and second sound separation portions at first and second sides of a center of the display panel and at a first distance from the center of the display panel.

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

baffles that respectively surround a periphery of the first sound generating actuator and the second sound generating actuator to form first and second spaces around the first sound generating actuator and the second sound generating actuator with the partition; and

at least one low sound speaker outside the first space and the second space.

14. The display device of claim 13, wherein the at least one low sound speaker includes a first low sound speaker at the first side of the partition and a second low sound speaker at the second side of the partition.

15. The display device of claim 13, wherein sound of a mid-high sound range is emitted by the sound generating actuators, sound of a low sound range is emitted by the low sound speaker, and a frequency of an intersection point of a sound characteristic curve by the actuators and a sound characteristic curve by the low sound speaker is 1 kHz-1.5 kHz.

16. The display device of claim 1, wherein the lower plate further includes an extension portion extending outwardly, and wherein the extension portion is fixed to the lower surface of the support portion.

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

baffles that respectively surround a periphery of the first sound generating actuator and the second sound generating actuator to form first and second spaces around the first sound generating actuator and the second sound generating actuator together with the partition,

wherein the baffles include at least one of an adhesive member bonded to an upper surface of the support portion or a lower surface of the display panel, and a sealing portion between the upper surface of the support portion and the lower surface of the display panel.

18. The display device of claim 1, wherein the partition extends in the vertical direction of the display panel at a center between the first sound generating actuator and the second sound generating actuator.

19. The display device of claim 1, wherein the support hole is formed through the support portion.

20. The display device of claim 19, wherein the sound generating actuator is fixed in the support hole.

21. A display device, comprising:

a display panel to emit light;

sound generating actuators in a first area of the display panel and a second area of the display panel, the sound generating actuators configured to vibrate the display panel to generate sound,

wherein at least one of the first and second areas includes two or more sound generating actuators;

a partition between the first and second areas; and

a support portion configured to support a rear portion of the display panel,

wherein at least one of the sound generating actuators is inserted into a support hole provided in the support portion to be fixed to the support portion, and

wherein the at least one of the sound generating actuators includes at least one of a lower plate inserted into the support hole, a magnet on the lower plate, a center pole at a center of the lower plate, a bobbin to surround a periphery of the center pole and having a tip end in contact with the display panel, and a coil wound around an outer periphery of the bobbin.

22. A display device, comprising:

a display panel to emit light;

sound generating actuators in a first area of the display panel and a second area of the display panel, the sound generating actuators configured to vibrate the display panel to generate sound;

a speaker outside the first area and the second area; and

a support portion configured to support a rear portion of the display panel,

wherein at least one of the sound generating actuators is inserted into a support hole provided in the support portion to be fixed to the support portion, and

wherein the at least one of the sound generating actuators includes at least one of a lower plate inserted into the support hole, a magnet on the lower plate, a center pole at a center of the lower plate, a bobbin to surround a periphery of the center pole and having a tip end in contact with the display panel, and a coil wound around an outer periphery of the bobbin.

23. The display device according to claim 22, wherein the speaker is configured to generate sound in a different range from the sound generating actuators.