CN114143674A

CN114143674A - Display device

Info

Publication number: CN114143674A
Application number: CN202010922417.9A
Authority: CN
Inventors: 王海盈; 周辉
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2022-03-04

Abstract

The invention provides a display device, which comprises a display panel, a back plate, a frame and an exciter, wherein the exciter is positioned in the frame and comprises a shell, a coil, a magnet, a magnetostrictive member and a vibrating member; the shell is connected with the frame or the back plate, the shell surrounds the coil, the coil is used for generating an alternating magnetic field according to a control signal, the coil is annular, the magnet and the magnetostrictive parts are both positioned in the coil and are arranged along the axial direction of the coil, one end of the vibrating part is positioned in the shell, the other end of the vibrating part extends out of the shell, and the vibrating part, the magnet and the magnetostrictive parts are tightly pressed between the frame and the shell; the magnetostrictive member can be subjected to telescopic deformation along the axial direction of the coil in a superposed magnetic field of the alternating magnetic field and the magnetic field generated by the magnet, and drives the frame to vibrate and sound. The display device provided by the invention is small in thickness and accords with the development trend of ultra-thinning of the display device.

Description

Display device

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

With the development of modern engineering, display devices such as mobile phones, tablet computers and liquid crystal displays are widely applied to various aspects of production and life of people.

In the related art, the display device includes a back plate, a reflective sheet, a light guide plate, an optical film and a display panel, which are stacked in sequence, and the display device further includes a frame, which is connected to the back plate and encloses an accommodating cavity for accommodating the reflective sheet, the light guide plate, the optical film and the display panel. Wherein, be equipped with the exciter in the frame, the exciter drives the frame vibration sound production.

The exciter comprises a shell, and a coil, a magnet and a magnetostrictive member which are arranged in the shell, wherein the coil is annular, an accommodating space for accommodating the magnetostrictive member is formed inside the coil, and the magnet is also annularly surrounded outside the coil. The magnetostrictive actuator also comprises a vibrating piece, one end of the vibrating piece is positioned in the shell and abuts against the magnetostrictive piece, and the other end of the vibrating piece abuts against the sounding piece capable of vibrating and sounding. The magnetostrictive member can be deformed in a magnetic field in a stretching way, and the vibrating piece is driven to reciprocate to drive the frame to vibrate and sound.

However, since the actuator has a large dimension in the radial direction, when the actuator is applied to a display device, the thickness of the display device is large, which is not in accordance with the trend of ultra-thinning of the display device.

Disclosure of Invention

In view of the foregoing problems, embodiments of the present invention provide a display device having a small thickness, which is in line with the trend of ultra-thinning of display devices.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

an embodiment of the present invention provides a display device, including:

a display panel for displaying an image.

A back plate for supporting the display panel.

And the frame is connected with the back plate and surrounds the display panel.

The exciter is located in the frame and comprises a shell, a coil, a magnet, a magnetostrictive member and a vibrating member.

Wherein, the casing with the frame or the backplate is connected, the casing encloses outside the coil, the coil is used for generating alternating magnetic field according to control signal, the coil is the annular, the magnet with magnetostrictive member all is located in the coil, and follows the axial arrangement of coil, the one end of vibration piece is located in the casing, the other end of vibration piece stretches out outside the casing, just the vibration piece the magnet with magnetostrictive member compresses tightly the frame and between the casing.

The magnetostrictive member can be subjected to telescopic deformation along the axial direction of the coil in a superposed magnetic field of the alternating magnetic field and the magnetic field generated by the magnet, and drives the frame to vibrate and sound.

Compared with the prior art, the display device provided by the embodiment of the invention has the following advantages: the display device comprises a display panel capable of displaying images, a back plate is arranged on the rear side of the display panel, a frame is arranged on the periphery of the display panel, and the back plate and the frame form stable support for the display panel. The display device further comprises an exciter, the exciter can be used for driving the frame to vibrate and sound, and the frame surrounds the periphery of the display panel, so that the distance between the center of a sound field of the display device and the center of the display panel is small, when a user uses the display device, the phenomenon that the distance between the center of the sound field and the center of the display panel is too large is avoided, and the user experience is good. In addition, the exciter in this embodiment adopts a magnetostrictive exciter, and the magnet and the magnetostrictive member of the exciter are both accommodated inside the coil, so that the size of the exciter along the radial direction of the coil is reduced, and thus, when the exciter abuts against the frame, the thickness of the display device along the vertical direction of the display panel is reduced, and the ultra-thin development trend of the display device is met.

The display device as described above, wherein the coil includes a first coil and a second coil which are coaxially arranged, so that the intensity of the alternating magnetic field generated by the coil is increased, the thrust of the actuator is increased, and the sound intensity is increased.

The display device as described above, wherein the winding direction of the first coil and the winding direction of the second coil are disposed oppositely, and the first coil and the second coil are connected in series with each other through an electric connection wire. Therefore, the inductance generated when the first coil and the second coil are wound can be eliminated, the self load of the coils is reduced, and the exciter is favorable for pushing the frame to sound.

The display device as described above, wherein the magnet includes a first magnet and a second magnet, the first magnet is disposed in the first coil, the second magnet is disposed in the second coil, and polarities of the first magnet and the second magnet toward the end of the vibrating member are opposite.

That is, when the winding directions of the first coil and the second coil are opposite, the polarities of the first magnet and the second magnet disposed corresponding to the first coil and the second coil are also opposite.

The display device as described above, wherein the number of the first magnets is plural, the plural first magnets are arranged at intervals in the axial direction of the first coil, the polarities of the plural first magnets facing one end of the vibrating member are the same, and one magnetostrictive member is arranged between each two adjacent first magnets.

The number of the second magnets is multiple, the second magnets are arranged along the axial direction of the second coil at intervals, the second magnets face one end of the vibrating piece in the same polarity, and one magnetostrictive piece is arranged between every two adjacent second magnets.

Therefore, the magnetic flux at the position of the magnetostrictive member is larger, and larger thrust is easy to form to drive the frame to deform.

The display device as described above, wherein a first yoke is provided between the adjacent first and second magnets, the first yoke being connected to the case for forming a closed magnetic circuit.

Thus, the yoke can divide the housing into two parts, the part of the housing located outside the first coil and the yoke form a loop for the magnetic lines generated by the first coil to pass through, and the part of the housing located outside the second coil and the yoke form a loop for the magnetic lines generated by the second coil to pass through.

A display device as described above, wherein said magnetostrictive member is fixed relative to said magnet. Avoiding the separation between the magnet and the magnetostrictive member, resulting in the occurrence of impact noise and the like

The display device as described above, wherein the housing is further filled with a heat conducting medium, and the heat conducting medium can transfer heat generated by the coil to the housing, so as to help cool the coil and avoid overheating of the coil.

The display device as described above, wherein the axial direction of the coil is perpendicular to the side of the bezel where the exciter is located. That is, the reciprocating direction of the vibrating piece is perpendicular to the side where the vibrating piece is located, so that the deformation of the magnetostrictive piece can be transferred to the frame, and the sound intensity of the sound emitted by the frame is higher.

The display device as described above, wherein the frame is provided with a first groove, the first groove extends along a side of the frame where the first groove is located, and the vibrating member abuts against a bottom wall of the first groove.

Like this, the thickness of the frame of this department position can be reduced to first recess, and the rigidity of frame reduces, more is favorable to the vibrating part to promote the frame and warp to make the frame vibration sound production.

The display device as described above, wherein a first concave portion is disposed at a connection position of a side wall of the first groove and a bottom wall of the first groove, and the first concave portion is concave toward a side of the notch facing away from the first groove.

Like this, the junction rigidity of the diapire of first recess and lateral wall reduces, is favorable to the vibrating part to promote the frame and warp to make the frame vibration sound production.

The display device as described above, wherein a protruding portion is disposed on the bottom wall of the first groove, the thickness of the protruding portion is smaller than the depth of the first groove, and the length of the protruding portion is smaller than the length of the first groove; the vibrating piece is abutted against the protruding part.

Thus, the thickness and the weight of the frame are increased equivalently by the convex parts, and the thickness, the length and the like of the convex parts can be changed as required to obtain the vibration amplitude and the sound intensity of different frequencies.

The display device as described above, wherein a second groove is further disposed on an outer side surface of the frame opposite to the exciter, and the second groove extends along a side edge of the frame where the second groove is located.

That is to say, also set up the second recess that reduces frame rigidity on the lateral surface of frame, be favorable to the vibrating part to promote the frame and warp to make the frame vibration sound production.

The display device as described above, wherein the bezel includes: the body is perpendicular to the display panel, and the first groove is formed in the body; the flanging is connected with the body and arranged at an included angle, and the flanging is located on one side or two sides of the body along the vertical direction of the display panel.

Wherein, the turn-ups can be used to increase the intensity of frame. The body width is bigger, and is easier to be abutted with the exciter. And the strength of the body is high, and faults such as warping and the like can not occur in the vibration process.

The display device as described above, wherein the frame is provided with a driving arm protruding to the inner side of the frame, the protruding direction of the driving arm is parallel to the display panel, and the vibrating member abuts against the driving arm.

That is, when the space in the display device allows, the axial direction of the coil in the exciter and the length direction of the side edge can form any included angle, and the application range is wide.

The display device as described above, wherein the projection direction of the driving arm is perpendicular to the side of the frame where the driving arm is located. At this time, the axial direction of the coil in the exciter can be arranged in parallel with the length direction of the side edge, so that the exciter does not occupy too much vertical space of the side edge.

The display device as described above, wherein the display device further includes: the mounting bracket is used for being connected with the frame or the back plate; the casing with the installing support is connected, just the casing with still be equipped with elastic damping piece between the installing support, elastic damping piece has along coil axial's elastic force.

In this way, the exciter can be fixed on the back plate or the frame through the mounting bracket, and the exciter is prevented from shaking or shifting. And because the shell and the mounting bracket are also provided with the elastic vibration damping piece in front, the vibration impact on the exciter can be reduced.

The display device as described above, wherein the housing and the mounting bracket are connected by a threaded fastener; the shell is provided with a convex connecting part, and the threaded fastener penetrates through the connecting part and is connected with the mounting bracket; the elastic vibration damping piece comprises an elastic tube sleeved outside the threaded fastener, and two ends of the elastic tube are tightly pressed between the head of the threaded fastener and the mounting bracket.

Thus, when the vibrating element reciprocates in the axial direction of the coil, the housing is subjected to an impact in the axial direction of the coil, and the elastic deformation of the elastic tube can be used for buffering the impact applied to the housing.

The display device as described above, wherein the mounting bracket further includes a bearing portion located at an end of the exciter facing away from the vibrating member; the casing with pretension clearance has between the holding portion, elasticity damping spare is still including setting up elasticity pretension piece in the pretension clearance, elasticity pretension piece compress tightly the casing with between the holding portion, just elasticity pretension piece has and follows coil axial elastic force.

Wherein, for avoiding vibrating piece and frame separation, when the exciter passes through the installing support installation fixedly, vibrating piece and frame butt, this moment, the other end and the magnet butt of vibrating piece, magnet, the magnetostrictive member that are located the coil compress tightly and support on the end cover that deviates from vibrating piece at the casing along the coil axial.

Meanwhile, the elastic pre-tightening piece is arranged between the shell and the bearing part and matched with the elasticity of the elastic vibration damping piece, and the shell can move towards one side of the frame under the elastic action of the elastic pre-tightening piece, so that the vibration piece is abutted against the frame, and the separation of the vibration piece and the frame is further avoided.

The display device as described above, wherein the elastic preload member further includes a preload spring sleeved outside the housing, and the preload spring is compressed between the connecting portion and the bearing portion. Therefore, the pre-tightening spring and the elastic pre-tightening piece act together, and the vibrating piece is prevented from being separated from the frame. And the pre-tightening spring and the elastic pre-tightening piece can further alleviate the impact on the shell.

The display device as described above, wherein the number of the actuators is plural, and the plurality of actuators are arranged at intervals along the bezel, so that the plurality of actuators drive the bezel to generate sound together, and the sound intensity of the display device can be improved.

The display device as described above, wherein the plurality of actuators have distribution centers, and a line connecting the distribution centers and the center of the display panel is disposed perpendicular to the display panel. At this moment, the center of the sound field of the display device coincides with the center of the display panel in the vertical direction of the display panel, namely the sound picture is concentric, when a user uses the display device, the phenomenon that the distance between the center of the sound field and the center of the display panel is too large is avoided, and the user experience is better.

In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems that can be solved by the display device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a first schematic view of a connection structure between a mounting bracket and a back plate according to an embodiment of the present invention;

fig. 2 is a first schematic view of a connection structure between a mounting bracket and a back plate according to an embodiment of the present invention;

fig. 3 is a schematic view of a connection structure between a mounting bracket and a frame according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the actuator;

FIG. 5 is a first schematic view of a connection structure of the exciter and the frame;

FIG. 6 is a second schematic view of the connection structure of the exciter and the frame;

FIG. 7 is a third schematic view of the connection structure of the exciter and the frame;

FIG. 8 is a fourth schematic view of the connection structure of the exciter and the frame;

FIG. 9 is a fifth schematic view of the connection structure of the exciter and the frame;

FIG. 10 is a first schematic diagram of the distribution of actuators on the frame;

FIG. 11 is a second schematic diagram of the distribution of actuators on the frame;

FIG. 12 is a third schematic view of the distribution of actuators on the frame;

fig. 13 is a diagram showing the distribution of the actuators on the frame.

Reference numerals:

10: a display panel;

20: a back plate;

30: a frame;

31: a first groove; 311: a first recess; 312: a projection; 313: a second recess;

33: a body;

34: flanging;

35: a drive arm;

40: an exciter;

41: a housing; 411: a connecting portion; 412: a barrel; 413: a first end cap; 414: a second end cap;

421: a first coil; 422: a second coil; 423: an electrical connection wire;

431: a first magnet; 432: a second magnet;

44: a magnetostrictive member;

45: a vibrating member;

46: a first yoke; 461: a fixed part; 462: a moving part;

47: a second yoke;

50: mounting a bracket; 51: an elastic vibration damping member; 52: an elastic preload member; 53: and pre-tightening the spring.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the related art, the magnetostrictive actuator includes a housing, and a coil, a magnet, and a magnetostrictive member disposed in the housing, wherein the coil is annular, an accommodating space for accommodating the magnetostrictive member is formed inside the coil, and the magnet is also annularly surrounded outside the coil. The magnetostrictive actuator also comprises a vibrating piece, one end of the vibrating piece is positioned in the shell and abuts against the magnetostrictive piece, and the other end of the vibrating piece abuts against the sounding piece capable of vibrating and sounding. It can be understood that the magnetostrictive actuator is a rod-shaped structural member with the length larger than the radial dimension, when the magnetostrictive actuator is applied to a display device, the axial direction of a coil in the magnetostrictive actuator is parallel to the display panel, and the phenomenon that the thickness of the display device is too large due to too large length of the magnetostrictive actuator is avoided. However, the magnetostrictive actuator is provided with a magnetostrictive member, a coil, a magnet, and a housing in the radial direction, and the radial dimension of the magnetostrictive actuator is also large, so that the thickness of the display device is large, and the display device does not meet the trend of ultra-thinning of the display device.

Fig. 1 is a first schematic view of a connection structure between a mounting bracket and a back plate according to an embodiment of the present invention; fig. 2 is a first schematic view of a connection structure between a mounting bracket and a back plate according to an embodiment of the present invention; fig. 3 is a schematic view of a connection structure between a mounting bracket and a frame according to an embodiment of the present invention; FIG. 4 is a schematic structural view of the actuator; FIG. 5 is a first schematic view of a connection structure of the exciter and the frame; FIG. 6 is a second schematic view of the connection structure of the exciter and the frame; FIG. 7 is a third schematic view of the connection structure of the exciter and the frame; FIG. 8 is a fourth schematic view of the connection structure of the exciter and the frame; FIG. 9 is a fifth schematic view of the connection structure of the exciter and the frame; FIG. 10 is a first schematic diagram of the distribution of actuators on the frame; FIG. 11 is a second schematic diagram of the distribution of actuators on the frame; FIG. 12 is a third schematic view of the distribution of actuators on the frame; fig. 13 is a diagram showing the distribution of the actuators on the frame.

Referring to fig. 1 to 13, the present embodiment provides a display device, which includes a display panel 10, wherein the display panel 10 is used for displaying an image; a back plate 20, the back plate 20 being used for supporting the display panel 10; the frame 30, the frame 30 is connected with the back plate 20 and surrounds the display panel 10; an exciter 40, the exciter 40 being located within the bezel 30, the exciter 40 including a housing 41, a coil, a magnet, a magnetostrictive member 44, and a vibrating member 45; the casing 41 is connected with the frame 30 or the back plate 20, the casing 41 surrounds the coil, the coil is used for generating an alternating magnetic field according to a control signal, the coil is annular, the magnet and the magnetostrictive member 44 are both positioned in the coil and are arranged along the axial direction of the coil, one end of the vibrating member 45 is positioned in the casing 41, the other end of the vibrating member 45 extends out of the casing 41, and the vibrating member 45, the magnet and the magnetostrictive member 44 are tightly pressed between the frame 30 and the casing 41; the magnetostrictive member 44 can be deformed in a superimposed magnetic field formed by the alternating magnetic field and the magnetic field generated by the magnet in a telescopic manner along the axial direction of the coil, and drives the frame 30 to vibrate and sound.

Specifically, the display device includes a rear case (not shown), a back plate 20, a reflective sheet (not shown), a light guide plate (not shown), an optical film (not shown), and a light source (not shown) at one side of the back plate 20.

The display panel 10 is used for displaying an image, and includes a display area and a circuit board located on a ground side of the display area, and a driving display of the entire display panel 10 is realized by the circuit board.

The display device includes a day side, a left side, a right side, and a ground side, wherein the day side is opposite to the ground side, the left side is opposite to the right side, the day side is connected to one end of the left side and one end of the right side, respectively, and the ground side is connected to the other end of the left side and the other end of the right side, respectively. The display device further comprises a front side located at the side of the display panel 10 and a rear side located at the side of the back cover.

The light source is used for generating light, and the light source is positioned on the ground side of the display device. The light source is provided in the form of a light bar and comprises a circuit board and a plurality of LED lamps positioned on the circuit board, and light emitted by the light source enters from one side.

The reflector plate is used for reflecting light rays to the light emitting direction, and light rays emitted by the light source are uniformly distributed. The reflective sheet is fixed to the surface of the back plate 20. The reflector plate has a white reflecting surface, and is made of PET.

The light guide plate comprises a light inlet side and a light outlet side, the light source is positioned on the light inlet side of the light guide plate, and light entering from the light inlet side is emitted out from the light outlet side of the light guide plate by utilizing the refraction and total reflection action of the light guide plate, so that the linear light source is converted into a surface light source.

The reflector plate is arranged on one side opposite to the light emergent side of the light guide plate.

The light guide plate is made of glass, PMMA or PC.

The optical film is positioned on the light-emitting side of the light guide plate and used for brightening the light.

The optical film may include one or more films including at least one of a prism film, a brightness enhancement film.

The exciter 40 is used to drive the sounding part to vibrate and sound, and in this embodiment, the sounding part is the frame 30, that is, the sounding position of the display device is at the edge of its own circumference. Therefore, the distance between the center of the sound field of the display device and the center of the display panel 10 is smaller, and the phenomenon that the distance between the center of the sound field and the center of the display panel 10 is too large, so that a user has experience of sound-picture separation is avoided.

The actuator 40 includes a housing 41, a coil, a magnet, a magnetostrictive member 44, and a vibrating member 45. The exciter 40 is a magnetostrictive exciter, which drives the frame 30 to vibrate and generate sound by using a magnetostrictive effect, that is, the magnetostrictive material can periodically extend or shorten according to the magnitude of the magnetic field when magnetized in the magnetic field, so as to drive the frame 30 to vibrate. The magnetostrictive effect is a principle well known to those skilled in the art, and the working principle of the magnetostrictive effect is not described in detail in this embodiment.

Specifically, the housing 41 is in the form of a container for protecting the coil, the magnet, the magnetostrictive member 44, and the like. The material of the housing 41 may be a metal material, such as iron, so that the housing 41 may serve as a magnetic yoke through which magnetic lines of force pass.

For assembly, the housing 41 may include a barrel 412, and a first end cap 413 and a second end cap 414 covering two openings of the barrel 412, wherein the first end cap 413 and the second end cap 414 are detachably connected to the barrel 412, for example, the first end cap 413 and the second end cap 414 may be directly screwed with the barrel 412 or connected to the barrel 412 by a threaded fastener.

Optionally, the second end cap 414 may serve as a support member for supporting the coil, the coil may be fixed to the second end cap 414 by bonding, and the first end cap 413 is provided with a through hole for the vibrating element 45 to pass through.

The coil is connected with an external power supply and the amplifier and used for receiving a control signal and generating an alternating magnetic field according to the control signal. The magnet may be a permanent magnet or the like, the magnetic field generated by the magnet may be referred to as a static magnetic field, and the material of magnetostrictive member 44 may be a ferromagnetic material, a soft magnetic material, or the like, as is well known to those skilled in the art. The coil, magnet, and magnetostrictive member 44 may all be of a type well known to those skilled in the art, and the embodiment is not limited.

The static magnetic field is used for providing a static working point for the magnetostrictive member 44, the alternating magnetic field provides a dynamic working space for the magnetostrictive member 44, and the expansion coefficient of the magnetostrictive member 44 shows periodic extension or shortening along with the periodic variation of the intensity of the superimposed magnetic field of the alternating magnetic field and the static magnetic field, so that the vibrating member 45 is driven to move back and forth, and the vibrating member 45 drives the frame 30 to vibrate.

The axis of the coil is parallel to the axis of the cylinder 412, in this embodiment, the magnet and the magnetostrictive member 44 are both strip-shaped or rod-shaped structural members and are accommodated in the coil, and the magnet and the magnetostrictive member 44 are arranged along the axial direction of the coil.

The vibrating member 45 may be a rod-shaped member and passes through the through hole such that one end thereof is located inside the case 41 and the other end thereof protrudes outside the case 41. One end located within the housing 41 may extend axially into the coil and abut a magnet or magnetostrictive member 44.

Optionally, the magnet or magnetostrictive member 44 may also extend out of the coil, and at this time, in order to avoid rigid impact between the magnet or magnetostrictive member 44 and the first end cap 413, an elastic buffer, such as a rubber pad, a silicone pad, a zigzag spring, a disk spring, or the like, may be further disposed between the coil and the first end cap 413. Of course, the end of the vibrating element 45 located inside the casing 41 may also be provided with a vertically connected contact plate, which abuts against the magnet or magnetostrictive element 44, and an elastic buffer is provided between the contact plate and the first end cap 413.

A sealing member may be further disposed between the vibrating member 45 and the through hole, the sealing member is sleeved outside the vibrating member 45 and is used for sealing the housing 41, and the sealing member may be an elastic rubber member to mitigate the impact of the vibrating member 45 on the first end cap 413.

Since the elastic buffer is spaced between the magnet and the first end cap 413, the second yoke 47 may be disposed between the contact plate and the coil or between the elastic buffer and the coil to avoid the disconnection of the magnetic circuit, which is not limited in this embodiment.

In order to push the vibrating member 45 to vibrate, after the magnet and the magnetostrictive member 44 are stacked on the second end cover 414, the other side of the magnet and the magnetostrictive member 44 can extend out of the coil and abut against the vibrating member 45, that is, the magnet, the magnetostrictive member 44 and the vibrating member 45 are stacked on the second end cover 414 and pressed between the frame 30 and the second end cover 414, so that the magnet, the magnetostrictive member 44 and the vibrating member 45 are prevented from being separated from any adjacent two of the magnet, the magnetostrictive member 44 and the vibrating member 45 in the vibrating process of the vibrating member 45 driving the frame 30.

Compared with the arrangement mode of the related art in which the magnet is surrounded by the coil, the actuator 40 in the embodiment arranges the magnet inside the coil, and the magnet and the magnetostrictive member 44 are arranged in parallel along the axial direction of the coil, so that the dimension of the actuator 40 along the radial direction of the actuator is reduced, and when the actuator 40 is applied to a display device, the thickness of the display device is correspondingly reduced.

In some alternative embodiments, the coils include a first coil 421 and a second coil 422 that are coaxially disposed.

The first coil 421 and the second coil 422 may be connected in series or in parallel by an electrical connection line, and the connected first coil 421 and second coil 422 are connected to an external power supply, an amplifier, and the like. The first coil 421 and the second coil 422 may be connected to an external power source, an amplifier, and the like through an electrical connection line, respectively, and this embodiment is not limited thereto.

The first coil 421 and the second coil 422 which are coaxially arranged can increase the strength of the alternating magnetic field, so that the magnetic flux at the position of the vibrating piece 45 is increased, the expansion amount of the magnetostrictive piece 44 is increased, the frame 30 can be pushed to vibrate and generate sound, the sound intensity of the sound generated by the frame 30 is higher, and the sound generating effect of the display device is optimized under the condition that the radial size of the exciter 40 is not increased.

It can be understood that the coil is formed by winding the copper wire, the coil has different inductance sizes due to different parameters such as the number of turns of the coil and the diameter of the copper wire, the inductance easily forms loss on the coil, and the efficiency of the coil is low.

In some alternative embodiments, the winding direction of the first coil 421 and the winding direction of the second coil 422 are oppositely arranged, and the first coil 421 and the second coil 422 are connected in series with each other through the electric connection wire 423.

Therefore, the inductance in the first coil 421 and the inductance in the second coil 422 can be partially offset, when the first coil 421 and the second coil 422 have the same structure, the inductance of the first coil 421 and the inductance of the second coil 422 can be approximately offset, and the coils are used as pure resistive loads, so that the high-frequency response of the exciter 40 can be effectively improved, and the frequency bandwidth of the exciter 40 is expanded.

In some alternative embodiments, the magnets include a first magnet 431 and a second magnet 432, the first magnet 431 is disposed in the first coil 421, the second magnet 432 is disposed in the second coil 422, and polarities of the first magnet 431 and the second magnet 432 facing one end of the vibration member 45 are opposite.

When the winding directions of the first coil 421 and the second coil 422 are opposite, and the external control signal is applied thereto, the directions of the alternating magnetic fields generated by the first coil 421 and the second coil 422 are opposite. Correspondingly, the arrangement directions of the first and

second magnets

431 and 432 corresponding to the first and

second coils

421 and 422 are also opposite, so that the first and

second coils

421 and 431 and 422 and 432 can form two independent superimposed magnetic fields, respectively.

In some alternative embodiments, the number of the first magnets 431 is multiple, the multiple first magnets 431 are arranged at intervals along the axial direction of the first coil 421, the polarities of the multiple first magnets 431 facing to one end of the vibration member 45 are the same, and one magnetostrictive member 44 is arranged between each two adjacent first magnets 431; the number of the second magnets 432 is plural, the plural second magnets 432 are arranged at intervals along the axial direction of the second coil 422, the polarities of the ends of the plural second magnets 432 facing the vibrating member 45 are the same, and one magnetostrictive member 44 is arranged between each two adjacent second magnets 432.

Specifically, because the first coil 421 and the second coil 422 in the exciter 40 are coaxially arranged, the length of the exciter 40 is greater than the radial dimension of the exciter 40, that is, the exciter 40 is in a slender rod-shaped structure, in order to avoid that the magnetic flux at the position of the magnetostrictive member 44 is small, in this embodiment, the first coil 421 is correspondingly provided with a plurality of first magnets 431, the second coil 422 is correspondingly provided with a plurality of second magnets 432, and correspondingly, one magnetostrictive member 44 is respectively arranged between two adjacent first magnets 431 and between two adjacent second magnets 432, so that the magnetic flux at the position of the magnetostrictive member 44 is large, and a larger thrust is easily formed to drive the frame 30 to vibrate.

In some alternative embodiments, a first magnetic yoke 46 is disposed between the adjacent first and

second magnets

431 and 432, and the first magnetic yoke 46 is connected to the housing 41 to form a closed magnetic circuit through which magnetic lines generated by the coils can pass to avoid magnetic leakage.

Wherein, the polarities of the opposite ends of the first and

second magnets

431 and 432 are the same, and the first yoke 46 disposed between the first and

second magnets

431 and 432 can simultaneously pass through the magnetic lines of force of the magnetic field generated by the first and

second coils

421 and 422 and the first and

second magnets

431 and 432 on both sides.

Since the magnet moves with the magnetostrictive member 44, the first yoke 46 may include a moving part 462 and a fixed part 461, the moving part 462 is disposed between the first magnet 431 and the second magnet 432 and is movable along with the magnetostrictive member 44, and the fixed part 461 is disposed between the first coil 421 and the second coil 422 and is fixedly connected to the housing 41, for example, by a threaded fastener. A set gap is formed between the moving part 462 and the fixed part 461, so that the moving part 462 and the fixed part 461 can move relatively conveniently, and excessive magnetic leakage can be avoided.

In some alternative embodiments, magnetostrictive member 44 is fixed relative to the magnet. The magnetostrictive member 44 fixed to the magnet moves as a unit with respect to the coil, and has one end abutting against the vibrating member 45 and the other end abutting against the second end cap 414.

The magnetostrictive member 44 may be connected to the magnet by means of clamping, screwing, or the like, or may be fixed to the magnet by means of an adhesive member, which is not limited in this embodiment.

The magnetostrictive member 44 is fixed relative to the magnet, so that a plurality of independent components arranged along the axial direction of the coil can be fixed into a whole and move along with the magnetostrictive member 44 in a telescopic manner, and the phenomenon that when the exciter 40 vibrates, the adjacent magnetostrictive member 44 and the magnet are separated and generate gaps, so that impact noise and the like are caused.

In some alternative embodiments, the housing 41 is further filled with a heat conducting medium, and the heat conducting medium can transfer heat generated by the coil to the housing 41.

Therefore, heat generated in the coil can be timely transferred to the shell 41 through the heat-conducting medium and then dissipated to the air through the shell 41, and overheating of the coil is avoided. The heat transfer medium may be of a kind well known to those skilled in the art, such as a heat conductive silicone gel that is easily cured, a heat sink oil that may also be in a liquid state, and the like.

It is understood that the bezel 30 has a rectangular shape surrounding the outer side of the display panel 10, and the bezel 30 has four sides. The exciter 40 may be disposed on any one side of the frame 30, and the axial direction of the coil may be disposed at any included angle with respect to the side on which the coil is disposed.

In some alternative embodiments, the axial direction of the coil is arranged perpendicular to the side of the bezel 30 where the exciter 40 is located. Thus, the reciprocating direction of the vibrating element 45 is perpendicular to the length direction of the side where the exciter 40 is located, the expansion amount of the magnetostrictive element 44, that is, the moving distance of the vibrating element 45, can be directly transmitted to the frame 30 to meet the exciters 40 arranged at other angles, and the amplitude of the frame 30 can be larger by the vertically arranged exciters 40.

In order to stably support the display panel 10 by the frame 30 and the back plate 20, the frame 30 has high strength and rigidity, and thus the display device is prevented from being deformed due to collision or the like. Therefore, when the vibrating member 45 pushes the frame 30, the amplitude of the frame 30 is small, and it is difficult to generate sound.

Correspondingly, in the present embodiment, the frame 30 is provided with a first groove 31, and the first groove 31 extends along the side of the frame 30 where the first groove 31 is located; the vibrating member 45 abuts against the bottom wall of the first recess 31. That is, the thickness of the frame 30 at the position abutting against the vibrating member 45 is reduced to be smaller than the thickness of the frame 30 at other positions, and accordingly, the rigidity of the frame 30 is reduced, the frame 30 is easily deformed by the pushing of the vibrating member 45, and the frame 30 has a set vibration amplitude.

The depth of the first groove 31 may be 1mm-1.5mm, which not only enables the strength and rigidity of the frame 30 to be within a preset range, but also enables the frame to be easily deformed to sound.

The extension length of the first groove 31 along the length direction of the side edge can be set as required, as long as the extension length is greater than the radial dimension of the exciter 40, and the width of the first groove 31 can be smaller than or equal to the width of the frame 30, and the embodiment is not limited.

In some alternative embodiments, the side wall of the first groove 31 along the length direction of the side edge may be disposed at a right angle or an obtuse angle with the bottom wall of the first groove 31, and the present embodiment is not limited.

In some alternative embodiments, a first recess 311 is disposed at a junction between a side wall of the first groove 31 and a bottom wall of the first groove 31, and the first recess 311 is recessed toward a side of the notch facing away from the first groove 31. That is, the joint between the sidewall of the first groove 31 and the bottom wall of the first groove 31 is formed with a notch, which reduces the strength of the joint between the sidewall of the first groove 31 and the bottom wall of the first groove 31, so that the frame 30 can be deformed when the vibrating member 45 reciprocates.

The recessed portion may be a square groove, an arc groove, etc., and taking the arc groove as an example, the radius of the arc groove may be 0.2mm-0.3mm, so as to avoid the influence of the oversized recessed portion on the strength of the frame 30.

In some alternative embodiments, a protrusion 312 is disposed on the bottom wall of the first groove 31, the thickness of the protrusion 312 is smaller than the depth of the first groove 31, and the length of the protrusion 312 is smaller than the length of the first groove 31; the vibrating member 45 abuts against the projection 312. The protrusions 312 may increase the weight of the bezel 30.

Calculating formula according to resonance frequency:

wherein, F₀For the resonant frequency of the vibrating system, M_msBeing the vibrating mass of a vibrating system, C_msIs the compliance of the vibration system.

That is, the weight of the bezel 30 is increased by the protrusion 312, which can help to lower the low frequency resonance frequency of the bezel 30, i.e., enhance the low frequency generation effect of the bezel 30.

In some optional embodiments, a second concave portion 313 may be disposed at a contact position of the protruding portion 312 and the groove bottom of the first groove 31, for reducing strength at the contact position of the protruding portion 312 and the groove bottom of the first groove 31, and a structure of the second concave portion 313 may be the same as that of the first concave portion 311, and details of this embodiment are not repeated.

Referring to fig. 7 and 8, in some alternative embodiments, the protrusion 312 may have a multi-layer structure and form a step structure, and the size of the protrusion 312 is smaller at the position closer to the notch of the first groove 31. Of course, at this time, the first recess 311, the second recess 313 or both the first recess 311 and the second recess 313 may be disposed on both the first groove 31 and the protruding portion 312, and the embodiment is not limited.

In some alternative embodiments, a second groove is further provided on an outer side of the bezel 30 opposite to the exciter 40, and the second groove extends along a side of the bezel 30 where the second groove is located. That is, in the present embodiment, the outer side surface of the side of the frame 30 abutting against the vibrating member 45 is thinned, so that the rigidity of the frame 30 is reduced, the frame 30 is easily deformed by the pushing of the vibrating member 45, and the frame 30 has a predetermined vibration amplitude.

The depth of the second groove can be 1mm-1.5mm, so that the strength and rigidity of the frame 30 can be within a preset range, and the frame can be easily deformed to produce sound.

The extension length of the second groove along the length direction of the side edge can be set as required, for example, the extension length can be the same as the length of the side edge, and the width of the second groove can be smaller than or equal to the width of the frame 30, which is not limited in this embodiment.

In some alternative embodiments, the frame 30 may be provided with the first groove 31 and the second groove at the same time, in case the frame 30 has a predetermined strength and rigidity.

In some alternative embodiments, the bezel 30 includes: a body 33, wherein the body 33 is perpendicular to the display panel 10, and the first groove 31 is arranged on the body 33; the turned edge 34 is connected with the body 33 and arranged at an included angle, and the turned edge 34 is located on one side or two sides of the body 33 in the vertical direction of the display panel 10.

In order to increase the strength of the frame 30, the frame 30 generally has a flanging structure, and specifically, the frame includes a body 33 and a flange 34, the cross-sectional shape of the frame is generally U-shaped or L-shaped, and by providing the flange 34, bending deformation and the like of the body 33 can be avoided.

The flange 34 is disposed generally parallel to the display panel 10, and the body 33 is perpendicular to the display panel 10 and surrounds the display panel 10. Therefore, in order to increase the contact area with the vibrating member 45 without increasing the thickness of the display device, the vibrating member 45 is normally abutted on the body 33. That is, the first and

second grooves

31 and 33 are generally provided on the body.

The exciter 40 may be disposed at different angles from the side where the exciter is disposed, for example, the end surface of the vibration member 45 contacting the frame 30 may be an inclined plane.

In some alternative embodiments, the end surface of the vibrating element 45 contacting the frame 30 may be a plane perpendicular to the axial direction of the coil, the frame 30 is provided with a driving arm 35 protruding toward the inner side of the frame 30, the protruding direction of the driving arm 35 is parallel to the display panel 10, and the vibrating element 45 abuts against the driving arm 35.

The driving arm 35 may have a bump structure formed on the inner surface of the frame 30, and in this case, the driving arm 35 may extend in a predetermined direction such that a part of the outer wall surface of the driving arm 35 forms a contact surface with the vibrator 45. The driving arm 35 may also extend in a direction perpendicular to the side edge, and the driving portion may have a contact surface with a predetermined angle.

In some alternative embodiments, the axial direction of the coil may be parallel to the side where the coil is located, and in particular, the projection direction of the driving arm 35 is perpendicular to the side of the frame 30 where the driving arm is located. In this case, the exciter 40 extends along the length of the side where it is located, and occupies a small space in the vertical direction.

Therefore, for the direct type backlight module display device, the thickness of the thicker edge position in the middle part is smaller. This embodiment can utilize this thickness difference to place the actuators 40 along the length of the side edges, without the actuators 40 increasing the thickness of the display device.

In some optional embodiments, the display device further comprises: the mounting bracket 50, the mounting bracket 50 is used for connecting with the frame 30 or the back plate 20; the housing 41 is connected to the mounting bracket 50, and an elastic damping member is further disposed between the housing 41 and the mounting bracket 50, and the elastic damping member 51 has an elastic force along the axial direction of the coil.

Specifically, the mounting bracket 50 is used to fix the exciter 40 to the back plate 20 or the bezel 30, and the mounting bracket 50 may have different connection structures according to the fixing position. For example, referring to fig. 1 and 2, when the mounting bracket 50 is fixed on the back plate 20, the mounting bracket 50 is provided with a connecting piece that can be attached to the back plate 20, and the connecting piece is connected to the back plate 20 through a threaded connector. Referring to fig. 3, when the mounting bracket 50 is fixed on the frame 30, the mounting bracket 50 may have a fixing rod extending along the length direction of the side where the fixing rod is located, and the length of the fixing rod may be greater than the length of the first groove 31.

The mounting bracket 50 may also be fixedly connected to the back plate 20 or the frame 30 by bonding, welding, or the like.

In consideration of the fact that the vibration element 45 reciprocates relative to the housing 41 during operation of the actuator 40, the actuator 40 may be subjected to impact, and therefore, an elastic damping member 51 for buffering may be provided between the housing 41 and the mounting bracket 50, and the elastic damping member 51 may have an elastic force along the axial direction of the coil, so that the elastic damping member 51 may be deformed along the axial direction of the coil during operation of the actuator 40, thereby preventing the housing 41 and the coil from being subjected to rigid impact.

In some alternative embodiments, the housing 41 and the mounting bracket 50 are connected by threaded fasteners; the shell 41 is provided with a convex connecting part 411, and a threaded fastener penetrates through the connecting part 411 and is connected with the mounting bracket 50; the elastic damping member includes an elastic tube sleeved outside the threaded fastener, and both ends of the elastic tube are compressed between the head of the threaded fastener and the mounting bracket 50.

In this embodiment, the axial direction of the threaded fastener and the axial direction of the coil may form an included angle, the axial direction of the threaded fastener and the axial direction of the coil are arranged in parallel, the elastic tube is sleeved outside the threaded fastener, and the length of the elastic tube is greater than the thickness of the connecting portion 411, so that the elastic tube may be compressed between the head of the threaded fastener and the mounting bracket 50.

At this time, the housing 41 is restricted by the threaded fastener, and does not move vertically along the threaded fastener; when the actuator 40 works, the second end cap 414 receives the resisting force of the magnetostrictive member 44, and the housing 41 tends to move away from the side of the frame 30, so that the elastic tube can alleviate the impact on the housing 41 and prevent the housing 41 from shifting.

The elastic tube may be a rubber member or a silicone member, and the embodiment is not limited.

It is understood that, in order to prevent the vibrating member 45 from being separated from the frame 30, when the exciter 40 is fixed to the back plate 20 or the frame 30 by the mounting bracket 50, the vibrating member 45, the magnetostrictive member 44, and the magnet are in a compressed state.

To avoid the vibrating element 45 from separating from the frame 30 due to the vibration of the exciter 40 during the vibration of the exciter 40, in some alternative embodiments, the mounting bracket 50 further includes a bearing portion located at an end of the exciter 40 facing away from the vibrating element 45; a pre-tightening gap is formed between the shell 41 and the bearing part, an elastic pre-tightening piece 52 is further arranged in the pre-tightening gap, the elastic pre-tightening piece 52 is tightly pressed between the shell 41 and the bearing part, and the elastic pre-tightening piece 52 has elastic force along the axial direction of the coil.

Thus, when the display device is assembled, the elastic preload member 52 is compressed between the second end cap 414 and the receiving portion, and the second end cap 414 is always subjected to the elastic force of the elastic preload member 52 and has a tendency to move toward the side of the bezel 30. When the exciter 40 is operated, the vibrating member 45 is not separated from the frame 30 by inertia during vibration, and reliability is high.

The elastic preload member 52 may be a rubber pad, a silicone pad, etc., and the embodiment is not limited thereto.

In some alternative embodiments, the elastic preload member 52 further includes a preload spring 53 disposed outside the housing 41, and the preload spring 53 is compressed between the connecting portion 411 and the supporting portion. Thus, the housing 41 is simultaneously subjected to the pretightening force of the pretightening spring 53 and the elastic pretightening piece 52, and the reliability is high.

In some alternative embodiments, the number of actuators 40 is multiple, and multiple actuators 40 are spaced along the bezel 30.

Thus, when the display device works, the plurality of exciters 40 simultaneously drive the frame 30 to vibrate and sound, and the sound intensity of the display device is higher.

The number of the exciters 40 may be two, and the two exciters 40 may be simultaneously disposed on the side of the frame 30 on the day side or respectively disposed on the sides of the frame 30 on the left and right sides, and are set according to the intensity of the display device and the sound field distribution requirement.

For example, referring to fig. 10, when two exciters 40 are respectively disposed on the left and right sides of the bezel 30, the sound fields of the left and right sides of the display device can be expanded.

At this time, the center of the line connecting the two exciters 40 may be higher than the center of the display panel 10, so that the center of the sound field is higher than the center of the picture and the distance is within a preset range, thereby avoiding the occurrence of sound and picture separation.

The number of the exciters 40 may also be four, and one exciter 40 is disposed on each side of the frame 30, however, the number of the exciters 40 may also be other, and the embodiment is not limited.

In some alternative embodiments, the side of the same exciter 40 corresponding to the fixed position of the mounting bracket 50 and the side abutting against the vibrating element 45 may be two adjacent sides, which may be arranged as required. The structure of the driving arm 35 can be referred to as a bump structure connected to the actuator 40, and the description of this embodiment is omitted.

In some alternative embodiments, the plurality of actuators 40 have distribution centers, and the distribution centers and the line connecting the centers of the display panels 10 are disposed perpendicular to the display panels 10.

The distribution center of the plurality of exciters 40 may be considered as a sound field center, and the center of the sound field of the display device and the center of the display panel 10 are both located on the perpendicular line of the display panel 10, so that the sound and the picture of the display device are concentric, the separation of the sound and the picture of the display device is avoided, and the user experience is better.

The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display device, comprising:

a display panel for displaying an image;

a back plate for supporting the display panel;

the frame is connected with the back plate and surrounds the display panel;

an exciter located within the bezel, the exciter comprising a housing, a coil, a magnet, a magnetostrictive member, and a vibrating member;

the shell is connected with the frame or the back plate, the shell surrounds the coil, the coil is used for generating an alternating magnetic field according to a control signal, the coil is annular, the magnet and the magnetostrictive parts are both positioned in the coil and are arranged along the axial direction of the coil, one end of the vibrating part is positioned in the shell, the other end of the vibrating part extends out of the shell, and the vibrating part, the magnet and the magnetostrictive parts are tightly pressed between the frame and the shell;

2. The display device according to claim 1, wherein the coil comprises a first coil and a second coil which are coaxially arranged.

3. The display device according to claim 2, wherein a winding direction of the first coil and a winding direction of the second coil are arranged in opposite directions, and the first coil and the second coil are connected in series to each other through an electric connection line.

4. The display device according to claim 3, wherein the magnet includes a first magnet and a second magnet, the first magnet is provided in the first coil, the second magnet is provided in the second coil, and polarities of the first magnet and the second magnet toward the end of the vibrating member are opposite.

5. The display device according to claim 4,

the number of the first magnets is multiple, the first magnets are arranged at intervals along the axial direction of the first coil, the polarities of the first magnets facing one end of the vibrating piece are the same, and one magnetostrictive piece is arranged between every two adjacent first magnets;

6. The display device according to claim 5, wherein a first yoke is provided between the adjacent first and second magnets, the first yoke being connected to the case for forming a closed magnetic circuit.

7. The display device of claim 1, wherein the magnetostrictive member is fixed relative to the magnet.

8. The display device according to claim 1, wherein the case is further filled with a heat transfer medium that transfers heat generated by the coil to the case.

9. The display device according to claim 1, wherein an axial direction of the coil is arranged perpendicular to a side of the bezel where the driver is located.

10. The display device according to any one of claims 1 to 9, wherein the frame is provided with a first groove extending along a side of the frame on which the first groove is located;

the vibrating piece abuts against the bottom wall of the first groove.

11. The display device according to claim 10, wherein a first recess is formed at a junction of a side wall of the first groove and a bottom wall of the first groove, and the first recess is recessed toward a side facing away from a notch of the first groove.

12. The display device according to claim 10, wherein a protrusion is provided on a bottom wall of the first groove, a thickness of the protrusion is smaller than a depth of the first groove, and a length of the protrusion is smaller than a length of the first groove;

the vibrating piece is abutted against the protruding part.

13. The display device according to claim 10, wherein a second groove is further formed on an outer side surface of the bezel opposite to the exciter, and the second groove extends along a side edge of the bezel where the second groove is located.

14. The display device according to claim 10, wherein the bezel comprises:

the body is perpendicular to the display panel, and the first groove is formed in the body;

the flanging is connected with the body and arranged at an included angle, and the flanging is located on one side or two sides of the body along the vertical direction of the display panel.

15. The display device according to any one of claims 1 to 9, wherein the frame is provided with a driving arm protruding toward an inner side of the frame, the driving arm protrudes in a direction parallel to the display panel, and the vibrating member abuts against the driving arm.

16. The display device according to claim 15, wherein the projection direction of the driving arm is perpendicular to the side of the bezel where the driving arm is located.

17. The display device according to any one of claims 1 to 9, further comprising:

the mounting bracket is used for being connected with the frame or the back plate;

the casing with the installing support is connected, just the casing with still be equipped with elastic damping piece between the installing support, elastic damping piece has along coil axial's elastic force.

18. The display device of claim 17, wherein the housing is coupled to the mounting bracket via a threaded fastener;

the shell is provided with a convex connecting part, and the threaded fastener penetrates through the connecting part and is connected with the mounting bracket;

the elastic vibration damping piece comprises an elastic tube sleeved outside the threaded fastener, and two ends of the elastic tube are tightly pressed between the head of the threaded fastener and the mounting bracket.

19. The display device of claim 18, wherein the mounting bracket further comprises a bearing portion at an end of the exciter facing away from the vibrating member;

the casing with pretension clearance has between the holding portion, still be equipped with elasticity pretension spare in the pretension clearance, elasticity pretension spare compress tightly the casing with between the holding portion, just elasticity pretension spare has and follows coil axial elastic force.

20. The display device as claimed in claim 19, wherein the elastic preload member further comprises a preload spring fitted around the housing, the preload spring being compressed between the connecting portion and the bearing portion.

21. The display device according to any one of claims 1 to 9, wherein the number of the actuators is plural, and the plural actuators are provided at intervals along the bezel.

22. The display device according to claim 21, wherein the plurality of drivers have a distribution center, and a line connecting the distribution center and the center of the display panel is arranged perpendicular to the display panel.