CN113225501A - Display device and speaker - Google Patents

Abstract

The application provides a display device and speaker relates to and shows technical field for can increase the technical problem of display device thickness when solving current display device and improving speaker sound pressure level, this display device includes: a display panel for displaying an image; the rear shell supports the display panel, and the rear shell and the display panel enclose a first accommodating cavity; the loudspeaker is located in the first accommodating cavity and comprises a voice coil, and a first vibrating plate and a second vibrating plate which are respectively connected with the two ends of the voice coil, and the vibration of the voice coil is transmitted to the first vibrating plate and the second vibrating plate so as to drive the first vibrating plate and the second vibrating plate to vibrate. The application provides a display device sound pressure level is high, and can not increase display device's thickness.

Description

Display device and speaker

Technical Field

The application relates to the technical field of display, in particular to a display device and a loudspeaker.

Background

With the development of science and technology and the improvement of the living standard of people, display devices such as liquid crystal televisions are increasingly applied to the work and the life of people.

A liquid crystal television generally includes a rear case, a display panel, a speaker, and the like; the rear shell and the display panel enclose an accommodating cavity, and the loudspeaker is arranged in the accommodating cavity. The display panel is used for displaying images, and the loudspeaker is used for playing audio information. In order to increase the sound pressure level of the lcd tv, two speakers are usually installed in an inverted overlapping manner, and the sound waves emitted from the two speakers are overlapped to improve the sound quality of the audio signal.

However, the two speakers are oppositely arranged in a superposed manner, which easily results in the increase of the thickness of the speakers, and is not in line with the trend of ultra-thinning of the lcd tv.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide a display device and a speaker that have high sound pressure level without increasing the thickness of the display device.

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

an embodiment of the present application provides a display device, which includes: a display panel for displaying an image; the rear shell supports the display panel, and the rear shell and the display panel enclose a first accommodating cavity; the loudspeaker is located in the first accommodating cavity and comprises a voice coil, and a first vibrating plate and a second vibrating plate which are respectively connected with the two ends of the voice coil, and the vibration of the voice coil is transmitted to the first vibrating plate and the second vibrating plate so as to drive the first vibrating plate and the second vibrating plate to vibrate.

In some embodiments, the speaker includes a magnet and a barrel-shaped first magnetically permeable member, the first magnetically permeable member including a support plate and a sidewall; a through hole is formed in the bearing plate, and one end of the voice coil penetrates through the through hole and extends to one side, away from the side wall, of the bearing plate; the magnet is arranged on the part of the bearing plate, which is positioned in the voice coil.

In some embodiments, the voice coil includes a first section and a second section connected, an end of the first section facing away from the second section is connected to the first vibration plate, and an end of the second section facing away from the first section is connected to the second vibration plate; one of one end of the first section, which is far away from the first vibrating plate, and one end of the second section, which is far away from the second vibrating plate, is provided with a plurality of protruding parts, and the protruding parts penetrate through the through holes to be connected with the other protruding parts; a plurality of the bulge is followed the circumference interval setting of voice coil loudspeaker voice coil, every the bulge all corresponds one the through-hole.

In some embodiments, the speaker includes a first guide and a second guide, the first guide and the second guide being respectively provided at both ends of the side wall in the direction of the axis of the voice coil; the first guide piece is provided with a first centering hole, the second guide piece is provided with a second centering hole, the wall surface of one end, connected with the first vibrating plate, of the voice coil is in contact with the hole wall of the first centering hole, and the wall surface of one end, connected with the second vibrating plate, of the voice coil is in contact with the hole wall of the second centering hole.

In some embodiments, the first vibration plate and the second vibration plate have different resonance mode frequencies.

In some embodiments, a projection of the second vibration plate on the first vibration plate is located within the first vibration plate.

In some embodiments, the speaker includes an edge strip connecting the first vibration plate and the second vibration plate, and the edge strip, the first vibration plate and the second vibration plate enclose a second receiving cavity receiving the voice coil.

In some embodiments, the edge strip comprises: a first flange arranged perpendicular to the first vibration plate; the second folded edge is perpendicular to the first folded edge, the second folded edge is connected with one side, close to the second vibrating plate, of the first folded edge, the second vibrating plate is connected with the second folded edge, and at least part of the second folded edge extends out of the second vibrating plate.

In some embodiments, a first flange is arranged at one end of the voice coil, which is connected with the first vibrating plate, the first flange is arranged perpendicular to the axis of the voice coil, and the first flange is attached to the first vibrating plate; and a second flanging is arranged at one end of the voice coil connected with the second vibrating plate, the second flanging is perpendicular to the axis of the voice coil, and the second flanging is attached to the second vibrating plate.

In some embodiments, the first vibration plate and the second vibration plate are identical in structure and each include: a paper core; the first skin covers the side, facing away from the voice coil, of the paper core; and the second skin covers the side face of the paper core, on which the voice coil is arranged, and the voice coil is connected with the second skin.

Compared with the related art, the display device provided by the embodiment of the application has the following advantages: display device includes display panel and backshell, and display panel is used for showing the image, and the backshell is used for bearing display panel, and display panel and backshell are connected and are formed the holding chamber, and display device still includes the speaker, and the speaker setting is in the holding intracavity. The loudspeaker comprises a voice coil, a first vibrating plate and a second vibrating plate, wherein the first vibrating plate and the second vibrating plate are connected to two ends of the voice coil, the loudspeaker further comprises a magnetic assembly, the voice coil reciprocates along the axis direction of the voice coil under the action of electromagnetism, and the first vibrating plate and the second vibrating plate vibrate along with the voice coil. The sound waves on the two sides of the first vibrating plate and the second vibrating plate can be superposed, and the sound pressure level of the loudspeaker is high. Moreover, compared with a mode that two loudspeakers are arranged in a superposed mode, the embodiment of the application can realize the playing of high-sound-pressure-level audio information through one loudspeaker, the thickness of the loudspeaker is not increased, namely, the sound pressure level of the loudspeaker is improved under the condition that the thickness of the display device is not increased, and the frequency response uniformity of the loudspeaker at a low frequency band is improved.

The embodiment of the application provides a loudspeaker, it includes: a voice coil; the vibration of the voice coil is transmitted to the first vibration plate and the second vibration plate so as to drive the first vibration plate and the second vibration plate to vibrate.

In addition to the technical problems solved by the embodiments of the present application, 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 and the speaker provided by the embodiments of the present application, 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 technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of the exciter of FIG. 1;

FIG. 3 is an exploded schematic view of the exciter of FIG. 2;

FIG. 4 is another schematic structural view of the actuator of FIG. 1;

FIG. 5 is a cross-sectional view of the actuator of FIG. 4;

fig. 6 is a schematic structural view of a first vibration plate;

fig. 7 is a schematic structural diagram of another speaker according to an embodiment of the present application;

FIG. 8 is a cross-sectional view of the speaker of FIG. 7;

fig. 9 is a schematic structural diagram of another speaker according to an embodiment of the present application;

fig. 10 is a cross-sectional view of the speaker of fig. 9;

fig. 11 is an exploded view of the speaker of fig. 10;

FIG. 12 is a schematic view of the structure of the edge strip;

fig. 13 is a schematic structural diagram of another speaker according to an embodiment of the present application;

FIG. 14 is a schematic structural view of the actuator of FIG. 13;

FIG. 15 is an exploded view of the actuator of FIG. 13;

fig. 16 is a schematic structural view of the first magnetic conductive member in fig. 13;

FIG. 17 is a schematic structural view of the second stage of FIG. 13;

FIG. 18 is a graph of the frequency response of the speaker of FIG. 13;

fig. 19 is a schematic structural diagram of another speaker according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of another speaker according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of another speaker according to an embodiment of the present application.

Reference numerals:

10: a display panel;

20: a rear housing;

30: a speaker;

31: a guide member; 311: a first guide portion; 312: a second guide portion; 313: a guide piece; 314: reducing the strength of the mouth; 315: a first elastic wave; 316: a second elastic wave;

32: a support member; 321: a first support section; 322: a second support portion;

33: a magnetic component; 331: a first magnetically conductive member; 3311: a support plate; 3312: a side wall; 3313: a through hole; 332: a magnet; 333: a second magnetic conductive member;

34: a voice coil; 341: a first stage; 342: a second stage; 343: a first projecting portion; 345: a first flanging; 346: second flanging; 347: a barrel; 348: a bonding section;

351: a first vibrating plate; 3511: a paper core; 3512: a first skin; 3513: a second skin; 3514: reducing the thickness of the hole;

352 a: a first side plate; 352 b: a second vibration plate;

353: edging; 3531: a first wall surface; 3532: a second wall surface; 3533: a strength reducing groove; 3534: a support bar; 3535: a sound outlet; 3536: a first folded edge; 3537: a second folded edge;

361: a second side plate; 3611: a first avoidance hole; 362: an elastic connecting member; 363: a sub-side plate; 3631: a second avoidance hole;

37: a support member;

38: connecting sheets; 381: a connecting portion; 382: a second projection.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present application more comprehensible, embodiments of the present application 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 present application 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 application.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure; FIG. 2 is a schematic structural diagram of the exciter of FIG. 1; FIG. 3 is an exploded schematic view of the exciter of FIG. 2; FIG. 4 is another schematic structural view of the actuator of FIG. 1; fig. 5 is a cross-sectional view of the actuator of fig. 4.

Referring to fig. 1 to 5, the present embodiment provides a display device, including: a display panel 10, the display panel 10 being for displaying an image; the rear shell 20, the rear shell 20 supports the display panel 10, and the rear shell 20 and the display panel 10 enclose a first accommodating cavity; and the loudspeaker 30, wherein the loudspeaker 30 is positioned in the first accommodating cavity.

In some embodiments, the display device provided by the present embodiment may be a liquid crystal television, a plasma television, a display, or the like.

The display device may include a display panel 10, a rear case 20, and an optical component, wherein the rear case 20 holds the display panel 10 and forms a first accommodating cavity, and the optical component is located in the first accommodating cavity.

In this embodiment, the rear housing 20 may be made of metal, such as steel, aluminum-magnesium alloy, and the like, and has the advantages of high strength, fast heat dissipation, and the like.

In some embodiments, the material of the rear housing 20 may be metal, plastic, glass, or the like.

In some embodiments, referring to fig. 1, a heat sink may be disposed at a position of the rear housing 20 opposite to the speaker 30 to help dissipate heat of the speaker 30. The shape of the rear case 20 may be a plate-shaped structure adapted to the display panel 10, such as a rectangle or a circle, or may be a three-dimensional structure having a curved shape, such as a cylindrical surface or a spherical surface, and the present embodiment is not limited thereto. The rear housing 20 may be an integrated structure formed integrally, or may be a split structure formed by connecting a plurality of sub-rear housings 20, wherein each sub-rear housing 20 may be fixedly connected to each other by welding, screwing, or the like.

In some embodiments, the display device may further include a Light source assembly, which may be connected to the rear case 20, the Light source assembly is generally a point Light source, such as a Light Emitting Diode (LED), and Light emitted from the backlight source may enter the optical assembly to convert the point Light source into a surface Light source.

The optical assembly may be applied to a display device requiring a backlight light source such as a liquid crystal television, wherein the optical assembly may include a reflection plate, a light guide plate, and an optical film material set, which are sequentially stacked on the rear case 20.

The reflecting plate can be arranged between the rear shell 20 and the light guide plate, and can reflect the light entering the light guide plate, so that the light path of the light is changed, the light is uniformly emitted from the light emitting surface of the light guide plate, and the light emitting efficiency of the light guide plate is improved. The reflecting plate and the light guide plate can be fixedly connected through a bonding member such as an adhesive tape.

The optical film material group is arranged on one side of the light guide plate, which is far away from the rear shell 20, and is used for further refracting and scattering light emitted from the light emitting surface of the light guide plate, so that the optical assembly can form a more uniform surface light source with higher brightness. The optical film material group may be one or more of a diffusion film, a prism film, etc., or other optical film material groups commonly used by those skilled in the art, such as a beam splitter, a polarizer, etc., and will not be described herein again.

The display panel 10 is disposed on the optical film assembly, the display panel 10 is generally a display panel 10 that does not emit light, and light emitted from the light source assembly irradiates the display panel 10 after passing through the optical assembly, so that various patterns and pictures can be formed by modulating the display panel 10, thereby displaying images. The display panel 10 may be of a construction well known to those skilled in the art.

In some embodiments, the display device may further include a speaker 30 for playing sound, and the number of the speakers 30 may be one or more, which is not limited in this embodiment.

The speaker 30 may include an exciter and a cabinet housing the exciter, the cabinet being shielded from the exciter, and the cabinet may be coupled with the rear case 20. The size and shape of the case and the position of the exciter on the vibrating member can be set as desired.

In some embodiments, speaker 30 may include an actuator comprising a vibration assembly including a guide 31 and a voice coil 34, guide 31 coupled to voice coil 34; the guide 31 is elastically deformable in the axial direction of the voice coil 34 when the voice coil 34 vibrates.

In the related art, a damper or the like guide is generally provided in the center of the voice coil 34 and contacts the outer wall surface of the voice coil 34, the voice coil 34 is guided to move through a centering hole in the center of the damper, and the voice coil 34 moves relative to the damper when the voice coil 34 reciprocates in the direction of its axis. And between damper and the vibrating piece, all have between damper and magnetic component or the support piece and dodge the clearance, namely be provided with a plurality of dodge clearances along voice coil 34 axis direction in succession, lead to voice coil 34 to be big along the extension length of self axis direction, speaker 30's thickness is big for display device's thickness is big.

In the present embodiment, the guide 31 is directly connected to the voice coil 34, when the voice coil 34 vibrates, the guide 31 elastically deforms along the axial direction of the voice coil 34 following the voice coil 34, and the guide 31 does not collide with the vibrating member all the time, that is, when the gap between the guide 31 and the support or the magnetic assembly is maintained as in the related art, at least the gap between the guide 31 and the vibrating member is reduced, the thickness of the speaker 30 is reduced, and the thickness of the display device is reduced.

The guide member 31 may include a plurality of connected guide blocks, two adjacent guide blocks may slide relatively along the axial direction of the voice coil 34, the voice coil 34 may drive one of the guide blocks connected thereto to slide along the axial direction of the voice coil 34, the guide block may drive the adjacent guide block to slide, and so on, the guide function of the guide member 31 on the voice coil 34 is realized. And extrusion along the radial direction of the voice coil 34 can not occur between two adjacent guide blocks, so that the voice coil 34 is prevented from radially deviating along the self, and noise is prevented from being emitted.

In some embodiments, the speaker 30 further includes a vibrating member connected to one end of the voice coil 34 in the axial direction; the guide 31 includes a first guide portion 311, the first guide portion 311 is surrounded outside the voice coil 34, the first guide portion 311 is connected to an end of the voice coil 34 near the vibrating member, and the first guide portion 311 extends to a side away from an axis of the voice coil 34. In the present embodiment, the structure, type, and the like of the vibrator are not limited, and the vibrator may have a plate shape, a cone shape, or the like.

The first guide portion 311 is connected to the end portion of the voice coil 34 close to the vibrating member, so that the first guide portion 311 is arranged in parallel with the voice coil 34 in the radial direction of the voice coil 34, and there is no need to provide an escape gap between the first guide portion 311 and the vibrating member in the axial direction of the voice coil 34, that is, there is only one escape gap between the first guide portion 311 and the magnetic member in the axial direction of the voice coil 34, so that the thickness of the speaker 30 in the axial direction of the voice coil 34 is reduced, and the thickness of the display device is reduced. In some embodiments, the clearance gap may be 0.7mm to 2 mm.

In some embodiments, the first guide portion 311 extends to a side away from the axis of the voice coil 34 to form a plate-like structure, the first guide portion 311 may be a damper having a wave bending structure in the related art, a centering hole of the damper is connected to an outer wall surface of the voice coil 34, the first guide portion 311 may also be in the shape of an annular plate, and the annular plate-like first guide portion 311 has a centering hole connected to the outer wall surface of the voice coil 34, so as to prevent the first guide portion 311 from deforming in the radial direction of the voice coil 34.

The plane of the first guide portion 311 may be perpendicular to the axis of the voice coil 34, or may be acute or obtuse to the axis of the voice coil 34. When the first guide portion 311 is disposed at an acute angle or an obtuse angle with respect to the axis of the voice coil 34, the elastic force of the first guide portion 311 may have a first component force along the axis of the voice coil 34 and a second component force along the radial direction of the voice coil 34, the first component force may guide the voice coil 34 to reciprocate along the axis direction of the first guide portion, the second component force may be toward the axis of the voice coil 34 or away from the axis of the voice coil 34 according to the moving direction of the voice coil 34, the second component force may block the voice coil 34 from moving in the radial direction when the second component force is directed toward the side away from the voice coil 34, correspondingly, the position of the first guide portion 311 corresponding to the position has a tendency to be squeezed, the position of the first guide portion 311 corresponding to the arbitrary radial position has a tendency to be stretched, that is, in the circumferential direction of the voice coil 34, the first guide portion 311 itself avoids radial deformation, preventing the voice coil 34 from moving radially.

In some embodiments, the material of the first guide portion 311 may be a material used in a related art for a damper, such as Acrylonitrile Butadiene Styrene (ABS), and the like, and the embodiment is not limited thereto.

In some embodiments, speaker 30 further includes a support member 37, support member 37 is attached to the vibrating member, and voice coil 34 is connected to a side of support member 37 facing away from the vibrating member.

The support member 37 can increase the connection area between the voice coil 34 and the vibrating member, and improve the connection stability between the voice coil 34 and the vibrating member. The support member 37 may have various shapes according to the shape of the vibrating member. For example, when the vibrating member is a cone basin with a thin-wall cylindrical shape, the supporting member 37 may be a supporting cone in the related art, and a side of the supporting cone close to the voice coil 34 may be provided with an annular groove for engaging with the voice coil 34, so that the connection is reliable.

In some embodiments, the first guide portion 311 may be connected with the support 37. The support member 37 may be integrally formed with the voice coil 34, and the support member 37 is connected to the first guide portion 311 as a flange structure. The holder 37 may be provided as a connecting member between the voice coil 34 and the vibrating member, independently of the voice coil 34 and the first guide portion 311. The receiver 37 may be integrally formed with the first guide portion 311.

When the speaker 30 is operated, the voice coil 34 vibrates, and when the voice coil 34 vibrates, the first guide portion 311 is elastically deformed, and since the first guide portion 311 is elastically deformed only in the axial direction of the voice coil 34, the vibration of the voice coil 34 connected thereto in the axial direction of the voice coil 34 can be guided, and the radial deviation of the voice coil 34 can be prevented.

In some embodiments, the actuator further comprises: a magnetic assembly 33, the magnetic assembly 33 being for generating a magnetic field in which the voice coil 34 vibrates in an axial direction of the voice coil 34.

The magnetic assembly 33 is located at the end of the voice coil 34 facing away from the vibrating member.

The magnetic assembly 33 may include a first magnetic conductive member 331, a magnet 332, and a second magnetic conductive member 333, wherein the first magnetic conductive member 331 and the second magnetic conductive member 333 may be a U-shaped iron and a washer, respectively, which are well known to those skilled in the art, the U-shaped iron may be in a cylindrical shape with an opening, and the magnet is disposed on a bottom surface inside the U-shaped iron; the washer is arranged on the magnet, and a gap is formed between the magnet and the inner wall surface of the U-shaped iron, namely a magnetic air gap. The magnetic assembly 33 is used to provide a stable magnetic field in the magnetic air gap, and the structure and material of the U-iron, the magnet and the washer are not limited in this embodiment.

The actuator may further comprise a support 32, the support 32 being connected to the magnetic assembly 33, and a side of the first guide 311 facing away from the voice coil 34 being connected to the support 32. The support member 32 may be made of steel, aluminum, zinc, plastic, etc., and may be shaped like a plate or a frame, which is well known to those skilled in the art, and the embodiment is not limited thereto.

The support 32 is connected to the magnetic assembly 33 and is located at the end of the voice coil 34 facing away from the vibrating member, it being understood that the end of the exciter facing away from the vibrating member, the end of the magnetic assembly facing away from the vibrating member, and the end of the support facing away from the vibrating member are considered to be of the same concept.

In some embodiments, the support 32 may be a split structure, the support 32 comprising: the first supporting part 321, the first supporting part 321 is arranged around the magnetic assembly 33, and the first supporting part 321 is connected with the magnetic assembly 33; and the second support part 322, the second support part 322 surrounding the first support part 321, and the side of the first guide part 311 departing from the voice coil 34 is connected with the second support part 322.

The second supporting portion 322 and the first supporting portion 321 are arranged at an interval, the second supporting portion 322 is connected with the first guiding portion 311, when the voice coil 34 vibrates, the first guiding portion 311 elastically deforms along with the voice coil 34, and when the voice coil 34 vibrates, the second supporting portion 322 can correspondingly move along the axial direction of the voice coil 34, so that the elastic deformation capacity of the first guiding portion 311 is improved.

In the related art, the voice coil has only one centering guide point, and in order to further prevent the voice coil from moving radially, in some embodiments, the guide 31 further includes: and a second guide portion 312, wherein the second guide portion 312 connects the first support portion 321 and the second support portion 322, and the second guide portion 312 and the first guide portion 311 are spaced apart from each other in the axial direction of the voice coil 34. The structure and operation principle of the second guiding portion 312 may be the same as those of the first guiding portion 311, and this embodiment is not described in detail.

The second guide 312 may also be elastically deformed in the axial direction of the voice coil 34, so that the voice coil 34 may have two centering guide points of the first guide 311 and the second guide 312. If the voice coil 34 is to move radially, the voice coil 34 needs to drive the second supporting portion 322 to move, and needs to press a certain point of the first guiding portion 311 and the second guiding portion 312 at the same time, so that the difficulty of moving the voice coil 34 radially increases, further avoiding the radial movement of the voice coil 34, and avoiding the noise generated by the speaker 30.

In some embodiments, the first guide portion 311 and/or the second guide portion 312 may include a plurality of guide tabs 313 arranged at intervals in the circumferential direction of the voice coil 34. The first guide portion 311 and/or the second guide portion 312 are/is elastically deformed, and power consumption of the speaker 30 is reduced.

The guide piece 313 may be disposed like a fan blade that is twisted with respect to the axis of the voice coil 34, and the guide piece 313 may be subjected to bending deformation in the direction of the axis of the voice coil 34 without being subjected to compressive deformation of itself, and prevent the voice coil 34 from moving in the radial direction of itself, as long as the radial rigidity of the guide piece 313 is greater than the axial rigidity thereof.

In some embodiments, the guide piece 313 may also have a flat plate shape. Here, to prevent the voice coil 34 from moving radially, the guide piece 313 corresponding to the second guide portion 312 may be disposed perpendicular to the axis of the voice coil 34. The guide piece 313 may deform along an axis that is bent at an end connected to the first support portion 321 as a fulcrum and at an end connected to the second support portion 322, and facilitates the voice coil 34 to move along its own axis; while the guide tab 313 is not radially compressively deformed, helping to prevent the voice coil 34 from radially moving.

The guide piece 313 corresponding to the first guide portion 311 may also be disposed perpendicular to the axis of the voice coil 34, and in some embodiments, to facilitate the movement of the voice coil 34 along the axis direction, the guide piece 313 corresponding to the first guide portion 311 is disposed obliquely, and the inclination angle of the guide piece 313 may be related to the extension height of the second support portion 322 along the axis direction of the voice coil 34.

In some embodiments, the supporting member 37, the first guiding portion 311, the first supporting portion 321, the second supporting portion 322, and the second guiding portion 312 may be integrally formed, and the material of the supporting member may be ABS, a copolymer of Polyamide (PA) and ABS, a copolymer of Polycarbonate (PC) and ABS, High Impact Polystyrene (HIPS), or the like.

To facilitate the voice coil 34 to be reciprocally movable in the axial direction of the voice coil 34, the guide piece 313 may have a notch so that the guide piece 313 is easily elastically deformed. In some embodiments, the guide tab 313 is provided with a reduced-strength opening 314 along one or both sides of the circumference of the voice coil 34, the reduced-strength opening 314 extending along the circumference of the voice coil 34.

In some embodiments, the strength reducing port 314 may be provided only on the guide piece 313 corresponding to the first guide portion 311 or the second guide portion 312, or the strength reducing port 314 may be provided on the guide piece 313 corresponding to the first guide portion 311 and the second guide portion 312 at the same time.

It is understood that the strength reducing port 314 may be provided on a portion or all of the guide pieces 313 corresponding to the first guide portion 311; the strength reducing port 314 may be provided on a portion or all of the guide pieces 313 corresponding to the second guide portion 312.

The vibrating member may be a cone of a thin-walled cylinder in the related art, and in some embodiments, to reduce the thickness of the speaker 30, the vibrating member may be a first vibrating plate 351 having a flat plate shape, the voice coil 34 is connected to the first vibrating plate 351, and the vibration of the voice coil 34 is transmitted to the first vibrating plate 351 to drive the first vibrating plate 351 to vibrate, where the present embodiment does not limit the structure of the exciter.

The end face of the voice coil 34 and the first diaphragm 351 may be fixed by bonding with an adhesive; one end of voice coil 34 close to first vibration board 351 can set up turn-ups structure, and turn-ups structure and the laminating of first vibration board 351 set up, and increase voice coil 34 and the area of being connected of first vibration board 351 are connected reliably. It will be appreciated that the flange structure may be the above-mentioned support 37, or the flange structure may be attached to the side of the support 37 facing away from the vibrating element.

The other end of the voice coil 34 is surrounded outside the magnet 332 and the second magnetic conductive member 333, a first distance is arranged between the end part of the voice coil 34 departing from the first vibrating plate 351 and the first magnetic conductive member 331, a second distance is arranged between the inner wall surface of the voice coil 34 and the magnet 332 and the second magnetic conductive member 333, a third distance is arranged between the outer wall surface of the voice coil 34 and the first magnetic conductive member 331, and the first distance, the second distance and the third distance are arranged according to actual needs.

The vibrating member of the speaker 30 in the display device provided by this embodiment adopts a plate-shaped structure, the thickness of the vibrating member along the axial direction of the voice coil 34 is smaller than the thickness of the cone in the related art, so that the thickness of the speaker 30 is also smaller, the thickness of the display device is smaller, and the first vibrating plate 351 is used as a part of the box body, so that the avoidance distance between the vibrating member and the box body in the speaker 30 can be avoided, the thickness of the speaker 30 is smaller, and the development trend of ultra-thinning of the display device is met.

For any flat plate, under the condition that the geometric dimension of the flat plate is determined, the flat plate has modal frequency of infinite orders, and the modal frequency formula of the flat plate vibration is as follows:

wherein a and b are the length and width of the flat plate, ρ is the density of the flat plate, h is the thickness of the flat plate, and D is the bending strength of the flat plate.

Frequency f of first-order mode of flat panel₁₁Smaller, flat emitted acoustic frequencyThe lower the low frequency sound effect of the loudspeaker 30.

In some embodiments, the weight of the exciter is greater than that of the first vibration plate 351, which can be understood as adding a vibration mass to the first vibration plate 351, which is equivalent to increasing the equivalent density ρ of the first vibration plate 351, where ρ is increased and the first-order modal frequency f is known from the formula (1)₁₁The reduction helps the speaker 30 to excite the low-frequency sound with better sound effect. That is, the present embodiment increases the equivalent mass of the vibration system without increasing the mass of the first vibration plate 351, and decreases the first-order modal frequency f without decreasing the radiation efficiency of the acoustic wave₁₁The speaker 30 of the display device provided in this embodiment can emit low-frequency sound of 100Hz, so as to meet the design requirement of low-frequency sound of display devices such as lcd televisions.

It can be understood that the phase difference of sound waves radiated by the cone loudspeaker on one side of the vibrating part and on one side away from the vibrating part is 180 degrees, the sound waves on the two sides interfere with each other to weaken the sound waves, and the low-frequency performance of the exciter is reduced. In this embodiment, the vibrating member of the speaker 30 is a flat plate, the speaker 30 is developed into a flat plate speaker, sound waves radiated from two sides of the flat plate can be superposed for use based on the characteristic of flat plate sound wave radiation, the sound pressure level of the speaker 30 is high, and the problem of acoustic short circuit does not exist.

In order to facilitate the air to be pushed to radiate a greater sound pressure level, the mass of the first vibration plate 351 is small; meanwhile, in order to facilitate excitation of lower-order resonance modes of lower frequencies and to reduce the weight of the speaker 30, the thickness of the first vibration plate 351 is small. When the thickness of the first vibration plate 351 is less than 1.5mm, it is necessary to reinforce the rigidity of the first vibration plate 351 to prevent the speaker 30 from being deformed. In some embodiments, the first vibration plate 351 may be a paper core honeycomb plate with a thickness of 1mm to 1.5mm, and has a small weight and high strength. In some embodiments, fig. 6 is a schematic structural diagram of a first vibration plate, and referring to fig. 6, the first vibration plate 351 includes: a paper core 3511; a first skin 3512, the first skin 3512 covering the side of the paper core 3511 facing away from the voice coil 34; and a second cover 3513, wherein the second cover 3513 covers the side of the paper core 3511 where the voice coil 34 is arranged, and the voice coil 34 is connected with the second cover 3513.

Fig. 7 is a schematic structural diagram of another speaker provided in the embodiment of the present application, fig. 8 is a cross-sectional view of the speaker in fig. 7, fig. 9 is a schematic structural diagram of another speaker provided in the embodiment of the present application, fig. 10 is a cross-sectional view of the speaker in fig. 9, fig. 11 is an exploded schematic diagram of the speaker in fig. 10, and fig. 12 is a schematic structural diagram of a bar.

Referring to fig. 7 to 12, in some embodiments, the speaker 30 further includes: and a connection piece 38, wherein the connection piece 38 is attached to the first vibration plate 351, and the voice coil 34 is connected to the connection piece 38. The present embodiment does not limit the structure of the exciter, and the present embodiment takes the exciter structure in fig. 7 to 12 as an example for explanation.

The connecting piece 38 is attached to the side of the first vibration plate 351 where the voice coil 34 is arranged, or the connecting piece 38 can be attached to the second skin 3513, the connecting area of the connecting piece 38 and the second skin 3513 is large, and when the voice coil 34 vibrates, the vibration of the second skin 3513 is reduced, so that the second skin 3513 can be prevented from being separated from the paper core 3511, and the second skin 3513 can be prevented from being broken.

In some embodiments, in order to enable the whole connecting piece 38 to vibrate with the first vibrating plate 351 at the same time, an adhesive piece may be disposed on the whole connecting piece 38 close to the side of the first vibrating plate 351, so that the connection is firm.

In some embodiments, the entire side of the connection piece 38 near the first vibration plate 351 may be coated with an adhesive such as an optical cement for connection with the first vibration plate 351, which is reliable.

When the voice coil 34 is directly connected to the first diaphragm 351, the connection area between the voice coil 34 and the first diaphragm 351 is the end surface of the voice coil 34, and the connection area is small. When the voice coil 34 vibrates reciprocally, the first vibration plate 351 may be broken while vibrating reciprocally with the voice coil 34. In some embodiments, along the axial direction of the voice coil 34, the projection of the connection piece 38 on the first vibration plate 351 covers the projection of the voice coil 34 on the first vibration plate 351, and the connection area of the connection piece 38 and the first vibration plate 351 is large, so that the possibility of damaging damage to the first vibration plate 351 can be reduced, and the service life of the speaker 30 and the display device can be prolonged.

In some embodiments, the connection piece 38 may have a ring shape, a width of the connection piece 38 in a radial direction of the voice coil 34 is larger than a thickness of the voice coil 34, and a connection area of the connection piece 38 and the first vibration plate 351 is large.

In some embodiments, a side of the first vibration plate 351 close to the voice coil 34 is provided with a reduced thickness hole 3514, the reduced thickness hole 3514 extends to a side away from the voice coil 34, and the thickness of the reduced thickness hole 3514 is smaller than or equal to the thickness of the first vibration plate 351.

In some embodiments, the connecting tab 38 includes: a connection portion 381, the connection portion 381 being connected to a side surface of the first vibration plate 351 near the voice coil 34; and a second protrusion 382, wherein the second protrusion 382 extends into the reduced thickness hole 3514, the voice coil 34 is connected to the second protrusion 382, and at least a part of the voice coil 34 extends into the reduced thickness hole 3514.

The voice coil 34 is connected to the second protrusion 382, and the second protrusion 382 extends into the thickness-reduced hole 3514, so that the end of the voice coil 34 connected to the second protrusion 382 can extend into the thickness-reduced hole 3514, and the thickness of the speaker 30 can be reduced, where the reduced specific thickness is the sum of the thickness of the voice coil 34 extending into the thickness-reduced hole 3514 and the thickness of the connection piece 38, and the thickness of the display device to which the speaker 30 is applied can also be reduced, which meets the trend of ultra-thinning of the display device.

In some embodiments, in order to prevent the connection piece 38 from moving relative to the first vibration plate 351 and prevent the second protrusion 382 from vibrating relative to the connection portion 381, the second protrusion 382 is attached to the inner surface of the thickness reduction hole 3514, for example, by an adhesive. In addition, since the first vibrating plate 351 is usually made of a paper core honeycomb plate, and a hole is directly formed in the paper core honeycomb plate, the strength in the hole is easily reduced, and in this embodiment, the second protrusion 382 is attached to the inner surface of the thickness-reduced hole 3514, so that the strength of the thickness-reduced hole 3514 can be improved.

In some embodiments, the thickness reducing hole 3514 may penetrate the first vibration plate 351 in a direction perpendicular to the first vibration plate 351, which is easy to manufacture.

The second protrusion 382 may be located in the reduced thickness hole 3514, and in some embodiments, a side of the second protrusion 382 facing away from the voice coil 34 is located in the same plane as a side of the first vibration plate 351 facing away from the voice coil 34, and the thickness of the connection piece 38 is smaller than that of the first vibration plate 351. The height of the portion of the voice coil 34 extending into the reduced thickness hole 3514 is further increased and the thickness of the speaker 30 is further reduced.

In order to allow the connecting piece 38 to vibrate at the same time as a whole, the connecting piece 38 has high hardness, and relative vibration between the connecting piece 38 itself is avoided. In some embodiments, the connecting tab 38 is made of metal, and has high strength, so that the heat dissipation of the exciter is easy, and the loudspeaker 30 is prevented from being overheated and failing. Illustratively, the material of the connecting piece 38 may be aluminum.

The end face of the voice coil 34 may be directly connected to the connection piece 38 or the first diaphragm 351, and fixed by an adhesive such as an adhesive tape. In some embodiments, voice coil 34 includes: a cylinder 347; the bonding portion 348 is connected to the tubular body 347, and the bonding portion 348 is bonded to the first vibration plate 351. The fitting portion 348 may be annular and continuously provided along the axis of the voice coil 34, or may be a plurality of flap pieces intermittently provided along the circumferential direction of the voice coil 34.

The fitting portion 348 may extend to one side of the axis of the voice coil 34 or extend to one side deviating from the axis of the voice coil 34, and the fitting portion 348 is plate-shaped and is attached to the connecting piece 38, so that the connecting area is large and the connection is stable.

To reduce the thickness of the speaker 30 and the display device, the first vibration plate 351 may be formed as a part of the cabinet of the speaker 30 in some embodiments. The speaker 30 further includes: the first side plate 352a, the first side plate 352a and the first vibration plate 351 enclose a second receiving cavity that receives the voice coil 34.

The first side plate 352a is provided on a side of the voice coil 34 facing away from the first vibration plate 351, and the first side plate 352a is provided on a side of the first vibration plate 351 facing away from the rear case 20.

The first side plate 352a may be disposed at an angle or in parallel with the first vibrating plate 351, and the first side plate 352a and the first vibrating plate 351 are used as an example in the present embodiment. At this time, the speaker 30 is developed into a flat panel speaker, and the flat panel speaker further has a characteristic that the sound waves on both sides of the first vibration plate 351 have no phase reversal, that is, the sound waves on both sides of the first vibration plate 351 can be superimposed for use, and there is no problem of acoustic short circuit.

In some embodiments, in order to prevent the first vibration plate 351 from colliding with the rear case 20 to generate noise, a first avoidance gap is provided between the first vibration plate 351 and the rear case 20, and a second avoidance gap is provided between one end of the support 32 facing away from the voice coil 34 and the first side plate 352 a. The size of the first avoidance gap and the second avoidance gap can be set according to actual needs.

In some embodiments, the first and second bypass gaps may be selected between 0.7mm-2mm to reduce the thickness of the speaker 30.

In some embodiments, the thickness of the exciter may be 6mm to 9mm, and the thickness of the speaker 30 may be the sum of the thickness of the exciter, the thickness of the second avoidance gap, and the thickness of the first side plate 352a, that is, the thickness of the speaker 30 in the display device provided in this embodiment may be 7.7mm to 12mm, which is reduced compared to the thickness of the speaker 30 in the related art which is 30mm to 40 mm.

In some embodiments, the speaker 30 further includes an edge strip 353, the edge strip 353 connects the first vibration plate 351 and the first side plate 352a, the first vibration plate 351, the first side plate 352a and the edge strip 353 enclose a second receiving cavity for receiving the voice coil 34, the edge strip 353 is connected to the rear case 20 or the display panel 10, and the edge strip 353 may be integrally formed with any one of the first side plate 352a and the first vibration plate 351.

In some embodiments, the first-order modal frequency f of the first vibration plate 351 may be further reduced by reducing the bending strength of the first vibration plate 351₁₁. The edge strip 353 includes: the first wall 3531 is positioned in the second accommodating cavity; a second wall 3532, the second wall 3532 being disposed opposite to the first wall 3531; at least one of the first wall 3531 and the second wall 3532 is provided with a strength reducing groove 3533.

The strength reducing groove 3533 may elastically deform the edge 353, and when the first vibration plate 351 vibrates, the first vibration plate 351 may vibrate relative to the first side plate 352a, which is equivalent to reducing the bending strength D of the first vibration plate 351, thereby reducing the first-order mode frequency f of the first vibration plate 351₁₁To help the speaker 30 to emit soundMore efficient low frequency tones.

The number of the strength reducing grooves 3533 may be plural, and the plurality of strength reducing grooves 3533 may be provided at intervals in the longitudinal direction of the edge strip 353. The strength reducing groove 3533 may be provided on the first wall 3531, the second wall 3532, or both the first wall 3531 and the second wall 3532, and when the strength reducing groove 3533 is provided on both the first wall 3531 and the second wall 3532, the strength reducing groove 3533 on the first wall 3531 and the strength reducing groove 3533 on the second wall 3532 are not communicated with each other, and for example, the strength reducing groove 3533 on the first wall 3531 and the strength reducing groove 3533 on the second wall 3532 may be offset in a direction perpendicular to the first vibration plate 351.

In some embodiments, the strength reducing groove 3533 may be strip-shaped and extend along the length direction of the edge strip 353, and the length of the strength reducing groove 3533 may be smaller than the length of the edge strip 353, and may also penetrate through the end surface of the edge strip 353 at the sound outlet 3535. One strip-shaped strength reducing groove 3533 may be provided in the first wall 3531, two strip-shaped strength reducing grooves 3533 may be provided in the second wall 3532, and three strength reducing grooves 3533 may be offset in a direction perpendicular to the first vibration plate 351.

When the speaker 30 is operated, the first diaphragm 351 vibrates, and if the edge 353 is deformed, one end of the exciter away from the first diaphragm 351 may contact the first side plate 352a, which may cause noise. In some embodiments, the first vibration plate 351 and/or the first side plate 352a are provided with a plurality of support rods 3534 extending towards each other, the plurality of support rods 3534 are arranged at intervals along the length direction of the edge 353, and the edge 353 is provided with insertion holes in insertion fit with the support rods 3534; the support bar 3534 extends less than the distance between the first vibration plate 351 and the first side plate 352 a.

Since the extension length of the support rod 3534 is less than the distance between the first vibration plate 351 and the first side plate 352a, that is, the extension length of the support rod 3534 in the direction perpendicular to the first vibration plate 351 is less than the thickness of the edge 353, the free end of the support rod 3534 does not pass through the edge 353, so that the rigid contact between the first vibration plate 351 and the support rod 3534 or between the support rod 3534 and the first side plate 352a on the first vibration plate 351 can be avoided, and the generation of noise of the speaker 30 can be avoided.

In some embodiments, the difference between the extension length of the support rod 3534 in the direction perpendicular to the first vibration plate 351 and the thickness of the edge bar 353 may be 1mm to 3 mm. In this way, the strake 353 can be prevented from being deformed, and the first vibration plate 351 can be made to obtain elastic edge support.

In some embodiments, the edge strip 353 further has a sound outlet 3535, and the sound outlet 3535 may be located on the top edge, the side edge, the bottom side of the rear case 20, or on the rear case 20.

In some embodiments, the sound outlet 3535 is toward a bottom side of the rear case 20, or a side of the rear case 20 facing away from the display panel 10.

Since the first vibration plate 351 radiates the sound waves to the first side plate 352a side and the rear case 20 side at the same time in this embodiment, the sound waves radiated on the bottom side of the rear case 20 and the rear case 20 can be used in a superimposed manner, and there is no problem of acoustic short circuit.

It is understood that the length of the sound outlet 3535 is set according to the shape of the first vibration plate 351 and the first side plate 352a, and when the first vibration plate 351 and the first side plate 352a are both circular, the shape of the sound outlet 3535 may be a bar arc shape.

In the present embodiment, the first vibration plate 351 and the first side plate 352a may be both rectangular, and the sound outlet 3535 may be located at one long side or short side of the first vibration plate 351 and the first side plate 352 a. Considering that the size of the long side or the short side of the first vibration plate 351 and the first side plate 352a is large, which may affect the vibration stability of the first vibration plate 351 and the first side plate 352a, a plurality of support bars 353 may be disposed at the sound outlet 3535, the plurality of support bars 353 may connect the first vibration plate 351 and the first side plate 352a, the plurality of support bars 353 may be disposed at the side where the sound outlet 3535 is located at intervals, and the plurality of support bars 353 may also be disposed with the strength reducing groove 3533 and the support bar 3534, which is not limited in this embodiment.

In some embodiments, the edge 353 is made of an elastic material. The edge 353 made of elastic material can soften the supporting edge of the first vibration plate 351, and reduce the elastic coefficient of the first vibration plate 351, that is, reduce the bending strength D of the first vibration plate 351, thereby reducing the first-order mode frequency f of the first vibration plate 351₁₁Is helpful toLow-frequency sounds with better sound effects are excited in the speaker 30.

In some embodiments, the material of the edge strip 353 may be silicon rubber, or the like, and the embodiment is not limited.

Fig. 13 is a schematic structural diagram of another speaker according to an embodiment of the present application, fig. 14 is a schematic structural diagram of an exciter in fig. 13, fig. 15 is an exploded schematic diagram of the exciter in fig. 13, fig. 16 is a schematic structural diagram of a first magnetic conductive member in fig. 13, fig. 17 is a schematic structural diagram of a second segment in fig. 13, and fig. 18 is a frequency response graph of the speaker in fig. 13.

Referring to fig. 13 to 18, in some embodiments, the first side plate 352a may be connected to an end of the voice coil 34 away from the first vibration plate 351, and the first side plate 352a may serve as a second vibration plate 352b, so that when the voice coil 34 vibrates, the first vibration plate 351 and the second vibration plate 352b are driven to vibrate. Based on the characteristics of the flat sound wave radiation, the sound waves radiated from the two sides of the flat plate can be superimposed for use, and the sound waves of the first vibration plate 351 and the second vibration plate 352b can be superimposed for use, so that the sound pressure level is high.

In the related art, a space is provided between the side of the actuator facing away from the first vibration plate 351 and the second vibration plate 352b, and the actuator is prevented from colliding with the second vibration plate 352 b. This distance is transformed to the distance between the second vibrating plate 352b and the first magnetic conductive member 331 in this embodiment, and the thickness of the speaker 30 in this embodiment is not increased.

In some embodiments, the first and second vibration plates 351 and 352b may be disposed at any angle to the axis of the voice coil 34, and in the present embodiment, the first and second vibration plates 351 and 352b may be disposed in parallel and both disposed perpendicular to the axis of the voice coil 34.

In some embodiments, the second vibration plate 352b may have the same material, structure, etc. as the first vibration plate 351, and in particular, the second vibration plate 352b may have a smaller mass in order to radiate a greater sound pressure level to the pushed air. Meanwhile, in order to facilitate excitation of lower-order resonance modes of lower frequencies and to reduce the weight of the speaker 30, the thickness of the second vibration plate 352b is small. Further, when the thickness of the second vibration plate 352b is less than 1.5mm, it is necessary to reinforce the rigidity of the second vibration plate 352b to prevent the second vibration plate 352b from being deformed.

In some embodiments, the second vibration plates 352b in this embodiment may be paper core honeycomb plates with a thickness of 1mm to 1.5mm, which have a low weight and high strength.

In some embodiments, the first vibration plate 351 and the second vibration plate 352b may be connected to both end surfaces of the voice coil 34, respectively, wherein the voice coil 34 may be connected to the first vibration plate 351 and the second vibration plate 352b by a detachable member such as a pin, or may be fixed by an adhesive such as an adhesive.

In some embodiments, the fit 348 may include a first cuff 345 and a second cuff 346. When the sticking and fixing mode is adopted, the first flange 345 is arranged at one end of the voice coil 34 connected with the first vibrating plate 351, the first flange 345 is arranged perpendicular to the axis of the voice coil 34, and the first flange 345 is stuck on the first vibrating plate 351; the end of the voice coil 34 connected to the second diaphragm 352b may be provided with a second flange 346 at the end of the voice coil 34 connected to the second diaphragm 352b, the second flange 346 may be arranged perpendicular to the axis of the voice coil 34, the second flange 346 may be attached to the second diaphragm 352b, the connection area between the first flange 345 and the first diaphragm 351, and the connection area between the second flange 346 and the second diaphragm 352b may be increased, and the connection stability may be high.

In some embodiments, the first magnetically permeable member 331 may include a support plate 3311 and a sidewall 3312, with the magnet 332 disposed on the support plate 3311. A through hole 3313 may be formed on the supporting plate 3311, and one end of the voice coil 34 passes through the through hole 3313 and even one side of the supporting plate 3311 away from the sidewall 3312, so that the first vibration plate 351 and the second vibration plate 352b may be respectively disposed at two sides of the magnetic component 33 to avoid collision and interference with the magnetic component 33 when the first vibration plate 351 or the second vibration plate 352b vibrates.

In some embodiments, the voice coil 34 is cylindrical and is inserted into the magnetic air gap, such that the magnet 332 and the washer are disposed on the supporting plate 3311 located inside the voice coil 34, and the distance between the outer wall surface of the voice coil 34 and the sidewall 3312 is the third distance.

In some embodiments, the voice coil 34 may be of an integral design, for example, the end of the voice coil 34 is provided with protrusions spaced along its circumference, and the end surfaces of the protrusions may be connected to the first vibration plate 351 or the second vibration plate 352 b.

In order to improve the connection stability of the voice coil 34 with the first vibrating plate 351 and the second vibrating plate 352b, in some embodiments, the voice coil 34 may be of a split design, and the voice coil 34 includes a first section 341 and a second section 342 connected, an end of the first section facing away from the second section 342 is connected with the first vibrating plate 351, and an end of the second section 342 facing away from the first section 341 is connected with the second vibrating plate 352 b; one of an end of the first section 341 facing away from the first vibration plate 351 and an end of the second section 342 facing away from the second vibration plate 352b is provided with a plurality of first protrusions 343, and the first protrusions 343 pass through the through holes 3313 to be connected to the other; the plurality of first protrusions 343 are provided at intervals in the circumferential direction of the voice coil 34, and each of the first protrusions 343 corresponds to one of the through holes 3313.

In some embodiments, an outer wall surface of the first protrusion 343 facing away from the axis of the voice coil 34 may be attached to an outer wall surface or an inner wall surface of the other of the first segment 341 and the second segment 342, a connection area is large, and connection reliability of the first segment 341 and the second segment 342 is high. The first segment 341 and the second segment 342 may be connected by a detachable member such as a pin, or may be bonded by a bonding member such as a bonding adhesive, which is not limited in this embodiment.

In some embodiments, the extension length of the first protrusion 343 in the axial direction of the voice coil 34 may be greater than the thickness of the support plate 3311, so as to avoid the collision interference between the first end or the second section 342 and the support plate 3311 when the voice coil 34 vibrates. The number of the through holes 3313 may correspond to the number of the first protrusions 343 one-to-one, or a plurality of the first protrusions 343 may share one through hole 3313, as long as there is a sliding gap between the through hole 3313 and the first protrusion 343, which prevents the first protrusion 343 from colliding with the through hole 3313 when the voice coil 34 vibrates.

In some embodiments, the guiding element 31 may be an elastic wave in the related art, the number of the elastic waves may be one, and the elastic waves are disposed on either side of the first magnetic conducting element 331.

The voice coil 34 in this embodiment passes through the through hole 3313 and extends to the other side of the supporting plate 3311 away from the sidewall 3312, and the height of the voice coil 34 along the axis direction thereof becomes larger, and accordingly, the number of elastic waves may be plural.

In some embodiments, the speaker 30 includes a first damper 315 and a second damper 316, the first damper 315 and the second damper 316 being respectively disposed at both ends of the sidewall 3312 in the axial direction of the voice coil 34; the first damper 315 is provided with a first centering hole, the second damper 316 is provided with a second centering hole, a wall surface of a connecting end of the voice coil 34 and the first vibration plate 351 is in contact with a hole wall of the first centering hole, and a wall surface of a connecting end of the voice coil 34 and the second vibration plate 352b is in contact with a hole wall of the second centering hole. First centering hole, second centering hole and voice coil 34 set up with the axle center, and when voice coil 34 vibrated, voice coil 34's both ends received the restraint in first centering hole and second centering hole respectively, and the guidance quality is high, avoids voice coil 34 to take place radial offset.

In some embodiments, the guide 31 may further include a first guide portion 311 and a second guide portion 312, the first guide portion 311 connects one end of the voice coil 34 with the second support portion 322, the second guide portion 312 connects the other end of the voice coil 34 with the second support portion 322, and any one of the first guide portion 311 and the second guide portion 312 may be disposed obliquely with respect to an axis of the voice coil 34 or disposed perpendicular to the axis of the voice coil 34.

The mode characteristics of the flat plate are that the low-order resonance mode frequency is sparse in the low-frequency range, and the high-order resonance mode frequency is dense in the high-frequency range. Because the low-order resonance mode frequency is sparse, the frequency response curve of the low frequency band has a deep valley, and the low frequency effect of the loudspeaker 30 is not ideal

Based on the characteristics of the flat plate sound wave radiation, the sound waves radiated from the two sides of the flat plate can be used in a superimposed manner, and the sound waves of the first vibrating plate 351 and the second vibrating plate 352b can be used in a superimposed manner, for example, in a superimposed manner in a low frequency band. To optimize the low frequency performance of the speaker 30, in some embodiments, the first and second vibration plates 351 and 352b may have different resonance mode frequencies.

The resonant mode frequency of the first vibrating plate 351 is f₁、f₂、f₃、f₄、f₅..., resonance of the second vibration plate 352bModal frequency of f_a、f_b、f_c、f_d、f_e.... for example, when the first diaphragm 351 and the second diaphragm 352b are operated simultaneously due to the difference in resonance mode frequency between the first diaphragm 351 and the second diaphragm 352b, the resonance mode frequency of the speaker 30 is f₁、f_a、f₂、f_b、f₃、f_c、f₄、f_d、f₅、f_e.., a design with denser low-frequency modal frequency of the speaker 30 is realized, please refer to fig. 18, so that the low-frequency band of the frequency response curve of the speaker 30 is smoother, and the low-frequency performance of the speaker 30 is improved.

As can be seen from the formula (1), the resonant mode frequencies of the first vibration plate 351 and the second vibration plate 352b are different as long as any one or more of the length, the width, the thickness, the material density, and the material rigidity of the first vibration plate 351 and the second vibration plate 352b are different. For convenience of manufacturing, in some embodiments, the first vibration plate 351 and the second vibration plate 352b may have the same material, that is, the same material density and material stiffness, and the same thickness as the first vibration plate 351 and the second vibration plate 352b, as long as the projection of the second vibration plate 352b on the first vibration plate 351 is located in the first vibration plate 351.

In some embodiments, taking the first and second vibration plates 352b as rectangular plates as an example, one or both of the length and the width of the second vibration plate 352b may be correspondingly smaller than those of the first vibration plate 351. For convenience of explanation, the length and width of the first vibration plate 351 may be a₁、b₁The length and width of the second vibration plate 352b may be a₂、b₂As long as a is satisfied₂<a₁，b₂<b₁Or a₂<a₁、b₂<b₁And (4) finishing.

In some embodiments, 0.7a₁<a₂≦0.9a₁，0.7b₁<b₂≦0.9b₁。

In some embodiments, the edge 353 connects the first vibration plate 351 and the second vibration plate 352b, and the edge 353, the first vibration plate 351, and the second vibration plate 352b enclose a second receiving cavity that receives the voice coil 34, so that the first vibration plate 351 and the second vibration plate 352b constitute a wall surface of the second receiving cavity.

In the related art, an exciter of the flat panel speaker is located in a box body, and a distance is reserved between the end face of the exciter departing from a vibrating plate and a side plate of the box body departing from the vibrating plate, so that the exciter is prevented from colliding with the box body. In the present embodiment, the voice coil 34 is connected to the second diaphragm 352b away from the first diaphragm 351, and the distance between the second diaphragm 352b and the support plate 3311 is changed, so that the thickness of the speaker 30 of the present embodiment is not increased.

In some embodiments, in order to facilitate the reciprocal vibration in the axial direction of the voice coil 34 at the position where the first vibration plate 351 and the second vibration plate 352b are connected to the edge strip 353, the edge strip 353 in this embodiment includes: a first folding edge 3536, the first folding edge 3536 being disposed perpendicular to the first vibration plate 351; and a second flange 3537, the second flange 3537 being perpendicular to the first flange 3536, the second flange 3537 being connected to the first flange 3536 on a side close to the second diaphragm 352b, the second diaphragm 352b being connected to the second flange 3537, at least a portion of the second flange 3537 extending outside the second diaphragm 352b, and a sound outlet 3535 being provided on the first flange 3536.

In some embodiments, the second vibration plate 352b overlaps the second flange 3537, and the second vibration plate 352b and the second flange 3537 may have the same shape as the first vibration plate 351 after being connected.

In some embodiments, the second and first folded edges 3536 may be made of the same or different materials, the second folded edge 3537 may be a plastic or aluminum plate, and the first folded edge 3536 may be a plastic or aluminum plate.

Fig. 19 is a schematic structural diagram of another speaker provided in the embodiment of the present application, fig. 20 is a schematic structural diagram of another speaker provided in the embodiment of the present application, and fig. 21 is a schematic structural diagram of another speaker provided in the embodiment of the present application.

Referring to fig. 19-21, in some embodiments, voice coil 34 may not be connected to the side plate of the case where the voice coil faces away from the vibrating member, i.e. speaker 30 further includes: the voice coil 34 and the guide piece 31 are positioned in the box body; the case includes a second side plate 361, and the second side plate 361 is disposed on a side of the voice coil 34 facing away from the vibrating member. In order to reduce the thickness of the speaker 30 and the display device, the second side plate 361 is provided with a first avoiding hole 3611, and an end of at least a portion of the magnetic assembly 33 facing away from the vibrating element is located in the first avoiding hole 3611.

The shape of the first avoiding hole 3611 may be square, circular, or the like, as long as the aperture of the first avoiding hole 3611 is larger than the circumferential dimension of the magnetic component 33, and the magnetic component 33 is prevented from colliding with the second side plate 361.

It is understood that the end surface of the magnetic component 33 facing away from the vibrating component may be located on the same plane as the side surface of the second side plate 361 near the vibrating component, or the end surface may be located in the first avoiding hole 3611, the speaker 30 does not need to have an avoiding distance between the exciter and the second side plate 361, the thickness of the speaker 30 becomes smaller, and the thickness of the display device becomes smaller.

In some embodiments, the first avoiding hole 3611 penetrates through the second side plate 361, and an end surface of the magnetic assembly 33 facing away from the vibrating member is located in the same plane as a side surface of the second side plate 361 facing away from the vibrating member. The thickness of the speaker 30 is the sum of the thickness of the exciter and the thickness of the vibrating element, and compared with the speaker 30 in the related art, the thickness of the speaker 30 in this embodiment is reduced by the thickness of the second side plate 361 and the escape distance between the magnetic assembly 33 and the second side plate 361, and the thickness of the speaker 30 is small, and the thickness of the display device is small.

The speaker 30 is installed in the display device, the second side plate 361 of the speaker 30 may be perpendicular to the horizontal plane, at this time, one end of the exciter is connected to the vibrating member, the other end of the exciter extends into the first avoiding hole 3611 and is a free end, and the exciter may be shifted under the action of gravity, resulting in noise generated by the speaker 30.

In some embodiments, the speaker 30 further includes: and the elastic connecting piece 362, wherein the elastic connecting piece 362 connects the first avoiding hole 3611 with one end of the magnetic assembly 33 away from the vibrating piece. It can be understood that, the elastic connectors 362 connect the first avoiding hole 3611 and the magnetic assembly 33, the number of the elastic connectors 362 may be multiple, and the elastic connectors are arranged at intervals along the circumferential direction of the first avoiding hole 3611, and any one of the elastic connectors 362 may connect the exciter to the first avoiding hole 3611, so as to prevent the exciter from being eccentric.

In some embodiments, the elastic connector 362 may be in the shape of a sheet, a plate, or the like, so as to avoid occupying the thickness space of the speaker 30.

In some embodiments, the elastic connector 362 may be made of rubber, woven cloth, Polyurethane (PU), or any material used in the related art for elastic waves. The elastic force of the elastic connecting piece 362 can enable the exciter to vibrate along with the vibration component, and the use is convenient.

In some embodiments, the elastic connector 362 is annular, and the annular elastic connector 362 closes the first avoiding hole 3611, so that the connection is reliable.

In order to prevent the elastic connecting member 362 from protruding out of the second side plate 361 under the action of its own elastic force and increase the thickness of the speaker 30, in some embodiments, the elastic connecting member 362 may be a flat plate, or the elastic connecting member 362 may be concave toward one side of the vibrating member in an arc shape.

In some embodiments, the speaker 30 further includes: the sub-side plate 363 is located at the first avoidance hole 3611, and a sub-side surface of the sub-side plate 363, which is away from the vibrating part, and a side surface of the second side plate 361, which is away from the vibrating part, are located in the same plane; the sub-side plate 363 is provided with a second avoiding hole 3631, one end of the magnetic assembly 33, which is away from the vibrating element, is connected with the second avoiding hole 3631, and the elastic connecting piece 362 is connected with the first avoiding hole 3611 and the sub-side plate 363.

The sub-side plate 363 can play a centering supporting role for the exciter, the sub-side plate 363 can also be used as a vibrating piece, when the exciter vibrates, the sub-side plate 363 vibrates to generate sound waves, the loudspeaker 30 is facilitated to radiate more sound waves, and the sound pressure level of the sound waves is improved.

The sub-side plate 363 is connected to the first avoiding hole 3611 through the elastic connecting member 362, wherein the shape of the sub-side plate 363 may be square, circular, and the like, which is not limited in this embodiment. The material of the sub-side plate 363 may be the same as that of the second side plate 361, and may be a paper core honeycomb plate.

The sub-side plate 363 is further provided with a second avoiding hole 3631 connected with the magnetic assembly 33, and the second avoiding hole 3631 can penetrate through the sub-side plate 363, so that the thickness of the speaker 30 can be maintained to be the sum of the thickness of the exciter and the thickness of the second side plate 361, the thickness of the speaker 30 is small, and the thickness of the display device is small.

In some embodiments, the present embodiment also provides a speaker 30, which includes: a voice coil 34; first and second vibration plates 351 and 352b, the first and second vibration plates 351 and 352b being connected to both ends of the voice coil 34, respectively, and vibration of the voice coil 34 being transmitted to the first and second vibration plates 351 and 352b to drive the first and second vibration plates 351 and 352b to vibrate.

The structure, the working principle, and the beneficial effects of the speaker 30 are described in the above embodiments, and are not described in detail in this embodiment.

In some embodiments, the speaker 30 may be applied to a display device such as a liquid crystal television, a plasma television, a display, and the like, for playing sound.

In the display device provided in the present embodiment, the vibrating members of the speaker 30 have a plate-shaped structure, that is, the first vibrating plate 351 and the second vibrating plate 352b are arranged, and two plate-shaped vibrating members are arranged in one speaker 30, so that sound waves of the two plate-shaped vibrating members can be superimposed for use, which is equivalent to increase the area of air that can be pushed by the vibrating plates, and the sound pressure level of the speaker 30 is high. Compared with the arrangement mode of reversely superposing two loudspeakers in the related art, the loudspeaker has the advantages that the sound pressure level of the loudspeaker is improved through one loudspeaker, and the thickness of the loudspeaker cannot be increased.

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 herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 application. 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 for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill 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 application.

Claims (11)

1. A display device, comprising:

a display panel for displaying an image;

the rear shell supports the display panel, and the rear shell and the display panel enclose a first accommodating cavity;

the loudspeaker is located in the first accommodating cavity and comprises a voice coil, and a first vibrating plate and a second vibrating plate which are respectively connected with the two ends of the voice coil, and the vibration of the voice coil is transmitted to the first vibrating plate and the second vibrating plate so as to drive the first vibrating plate and the second vibrating plate to vibrate.

2. The display device according to claim 1, wherein the speaker comprises a magnet and a barrel-shaped first magnetic conductive member, the first magnetic conductive member comprising a support plate and a side wall;

a through hole is formed in the bearing plate, and one end of the voice coil penetrates through the through hole and extends to one side, away from the side wall, of the bearing plate; the magnet is arranged on the part of the bearing plate, which is positioned in the voice coil.

3. The display device according to claim 2, wherein the voice coil includes a first segment and a second segment connected, an end of the first segment facing away from the second segment is connected to the first vibration plate, and an end of the second segment facing away from the first segment is connected to the second vibration plate;

one of one end of the first section, which is far away from the first vibrating plate, and one end of the second section, which is far away from the second vibrating plate, is provided with a plurality of protruding parts, and the protruding parts penetrate through the through holes to be connected with the other protruding parts; a plurality of the bulge is followed the circumference interval setting of voice coil loudspeaker voice coil, every the bulge all corresponds one the through-hole.

4. The display device according to claim 2, wherein the speaker includes a first guide and a second guide, the first guide and the second guide being provided at both ends of the side wall in the direction of the axis of the voice coil, respectively;

the first guide piece is provided with a first centering hole, the second guide piece is provided with a second centering hole, the wall surface of one end, connected with the first vibrating plate, of the voice coil is in contact with the hole wall of the first centering hole, and the wall surface of one end, connected with the second vibrating plate, of the voice coil is in contact with the hole wall of the second centering hole.

5. The display device according to any one of claims 1 to 4, wherein the first vibration plate and the second vibration plate have different resonance mode frequencies.

6. The display device according to claim 5, wherein a projection of the second vibration plate on the first vibration plate is located inside the first vibration plate.

7. The display device according to claim 6, wherein the speaker includes an edge bar connecting the first vibration plate and the second vibration plate, the edge bar, the first vibration plate, and the second vibration plate enclosing a second accommodation chamber accommodating the voice coil.

8. The display device according to claim 7, wherein the edge bar comprises:

a first flange arranged perpendicular to the first vibration plate;

the second folded edge is perpendicular to the first folded edge, the second folded edge is connected with one side, close to the second vibrating plate, of the first folded edge, the second vibrating plate is connected with the second folded edge, and at least part of the second folded edge extends out of the second vibrating plate.

9. The display device according to any one of claims 1 to 4, wherein a first flange is arranged at one end of the voice coil connected with the first vibrating plate, the first flange is arranged perpendicular to the axis of the voice coil, and the first flange is attached to the first vibrating plate;

and a second flanging is arranged at one end of the voice coil connected with the second vibrating plate, the second flanging is perpendicular to the axis of the voice coil, and the second flanging is attached to the second vibrating plate.

10. The display device according to any one of claims 1 to 4, wherein the first vibration plate and the second vibration plate are identical in structure and each include:

a paper core;

the first skin covers the side, facing away from the voice coil, of the paper core;

and the second skin covers the side face of the paper core, on which the voice coil is arranged, and the voice coil is connected with the second skin.

11. A loudspeaker, comprising:

a voice coil;

the vibration of the voice coil is transmitted to the first vibration plate and the second vibration plate so as to drive the first vibration plate and the second vibration plate to vibrate.

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