Sound production device, display device, and television

Abstract

The application provides a sound production device, a display device and a television. The sound production device comprises a sound production unit, the sound production unit comprising a shell and at least one loudspeaker, the shell having an acoustic cavity, the loudspeaker being arranged in the acoustic cavity, and the acoustic cavity being provided with a sound outlet; and at least one additional structure, the additional structure being connected with the shell, and the additional structure having a first cavity, the first cavity being communicated with the acoustic cavity. The sound production device can effectively improve the bass effect under limited clearance.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic device technology, and more particularly to a sound-generating device, a display device, and a television set. Background Technology

[0002] As display devices such as televisions and monitors become increasingly thinner, the available space inside electronic devices for acoustic structures is constantly being reduced. Traditional bass enhancement solutions typically employ bass-reflex enclosures or virtual bass enhancement technology. These solutions require large enclosure volumes and large woofers for deep bass. In products with limited space, it is difficult to guarantee both enclosure volume and woofer size, resulting in a significant deterioration in bass performance as the thickness decreases. Furthermore, large enclosures occupy considerable internal space in electronic devices, hindering the creation of a slim and lightweight design.

[0003] Therefore, how to effectively improve bass performance under limited headroom has become a pressing technical problem that needs to be solved. Summary of the Invention

[0004] This application provides a sound-generating device, a display device, and a television set. The sound-generating device can effectively enhance bass performance in limited headroom conditions.

[0005] This application provides a sound-generating device, including: a sound-generating unit, the sound-generating unit including a housing and at least one speaker, the housing having a sound cavity, the speaker being disposed within the sound cavity, the sound cavity having a sound outlet; and at least one additional structure connected to the housing, the additional structure having a first cavity, the first cavity communicating with the sound cavity.

[0006] This application provides a display device including the aforementioned sound-emitting device.

[0007] This application also provides a television set, including the above-described display device.

[0008] The sound-generating device, display device, and television provided in this application include a sound-generating unit and at least one additional structure. The sound-generating unit includes a housing and at least one speaker. The housing has a sound cavity, the speaker is disposed within the sound cavity, and the sound cavity has a sound outlet. Sound waves radiated by the speaker diaphragm enter a first cavity through the sound outlet, and the air column within the first cavity resonates at a specific frequency. The resonance effect of the first cavity enhances the sound pressure output near the resonant frequency, resulting in deeper bass. Based on the above structure, this application achieves deeper bass extension within a limited clearance without significantly increasing the enclosure volume or using a large-size woofer, while simultaneously reducing the size and thickness of the sound-generating device. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of a first structure of the sound-generating device provided in an embodiment of this application.

[0011] Figure 2 This is a schematic diagram of a second structure of the sound-generating device provided in an embodiment of this application.

[0012] Figure 3 This is a schematic diagram of the first structure of the sound-generating unit provided in the embodiments of this application.

[0013] Figure 4 This is a schematic diagram of a second structure of the sound-generating unit provided in an embodiment of this application.

[0014] Figure 5 This is a schematic diagram of a third structure of the sound-generating device provided in the embodiments of this application.

[0015] Figure 6 This is a schematic diagram of a first structure of a display device provided in an embodiment of this application.

[0016] Figure 7 This is a schematic diagram of the pipeline structure provided in an embodiment of this application.

[0017] Figure 8 This is a schematic diagram of a second structure of the display device provided in an embodiment of this application.

[0018] Figure 9 for Figure 8 A magnified schematic diagram of part A.

[0019] Figure 10 This is a schematic diagram of the structure of the closure provided in an embodiment of this application.

[0020] Figure 11 This is a schematic diagram of a third structure of the display device provided in an embodiment of this application.

[0021] Figure 12 This is a fourth structural schematic diagram of the display device provided in the embodiments of this application.

[0022] Figure 13 This is a fifth structural schematic diagram of the display device provided in the embodiments of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] This application provides a sound-generating device, a display device, and a television set. The sound-generating device can effectively improve bass performance within a limited space. The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0025] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of a first structure of the sound-generating device provided in an embodiment of this application. Figure 2 This is a schematic diagram of a second structure of the sound-generating device provided in an embodiment of this application.

[0026] The sound-generating device 10 includes at least one sound-generating unit 100 and at least one additional structure 200. The sound-generating unit 100 serves as the core of sound generation, while the additional structure 200 is used to assist in expanding the acoustic performance of the sound-generating unit 100, particularly its low-frequency response characteristics such as low-frequency extension and frequency response flatness.

[0027] The sound-generating unit 100 includes a housing 110 and at least one speaker 120. The housing 110 has a sound cavity 111, and the speaker 120 is disposed within the sound cavity 111. The speaker 120 is a transducer that converts electrical signals into sound signals, and there can be one or more of them, which can be flexibly configured according to the acoustic design requirements of the sound-generating device 10.

[0028] Please see Figure 3 as well as Figure 4 , Figure 3 This is a schematic diagram of a first structural embodiment of the sound-generating unit provided in this application. Figure 4 This is a schematic diagram of a second structure of the sound-generating unit provided in an embodiment of this application. The loudspeaker 120 further includes a mounting bracket 1201, a magnetic circuit system 1202, and a vibration system 1204. The mounting bracket 1201 is fixed to the housing 110; the magnetic circuit system 1202 is mounted on the mounting bracket 1201 and forms a magnetic gap. The vibration system 1204 includes a voice coil and a diaphragm 1204a. The diaphragm 1204a is mounted on the mounting bracket 1201, and its side facing away from the magnetic circuit system 1202 forms the sound-emitting surface; one end of the voice coil is fixedly connected to the diaphragm 1204a, and the other end extends movably into the magnetic gap. When an audio current passes through the voice coil, the voice coil is driven in the magnetic field to drive the diaphragm 1204a to vibrate reciprocally, thereby pushing the air to generate sound waves.

[0029] The diaphragm 1204a of the loudspeaker 120 divides the acoustic cavity 111 into a second cavity and a third cavity. Specifically, the acoustic cavity 111 is divided into a second cavity and a third cavity based on the diaphragm 1204a of the loudspeaker 120. The second cavity is the space on the front side of the diaphragm 1204a, i.e., the sound-emitting surface side, and the third cavity is the space on the rear side of the diaphragm 1204a, i.e., the magnetic circuit system 1202 side. The magnetic circuit system 1202 of the loudspeaker 120 is located in the third cavity, and the first cavity 210 of the additional structure 200 is connected to the second cavity. When the loudspeaker 120 is operating, the diaphragm 1204a radiates sound waves simultaneously in both forward and backward directions. The air inside the acoustic cavity 111 exerts an elastic effect on the diaphragm 1204a; this elastic effect is the air spring effect, and its stiffness is negatively correlated with the cavity volume.

[0030] Therefore, as the air elastic force on the diaphragm 1204a weakens with the increase of cavity volume during vibration, the equivalent air stiffness decreases, thereby shifting the low-frequency resonant frequency of the speaker 120 downward and improving the bass extension capability. By introducing the first cavity 210 connected to the sound cavity 111, the air volume can be effectively expanded without significantly increasing the external size of the sound unit 100, which not only improves low-frequency extension but also helps to achieve a thinner and more compact design for the display device.

[0031] In this application, the acoustic cavity 111 is provided with a sound outlet 113. The additional structure 200 is connected to the housing 110 and has a first cavity 210 inside. The first cavity 210 and the acoustic cavity 111 are interconnected through the sound outlet 113. After the connection, the acoustic cavity 111 and the first cavity 210 together constitute the extended cavity of the sound-emitting unit 100, which effectively increases the air volume at the front of the speaker 120.

[0032] In some specific implementations of this application, one end of the first cavity 210 is connected to the sound cavity 111, while the other end is closed. This closed structure prevents sound waves from leaking from the end of the pipe, ensures that all additional volumes participate in the air spring effect, and avoids airflow noise that may be generated at the open end. The shape of the inner wall of the closed end can be further optimized, for example, by setting it as a spherical or inclined surface, to reduce the concentrated reflection of sound waves at the closed end and reduce the intensity of standing wave formation. In other specific implementations of this application, one end of the first cavity 210 is connected to the sound cavity 111, while the other end is open.

[0033] Please see Figures 1 to 3 In some embodiments, the diaphragm 1204a of the loudspeaker 120 has a vibration axis X. The vibration axis X refers to the central axis of the diaphragm 1204a during its reciprocating motion, and is typically perpendicular to the plane in which the diaphragm 1204a is located, and coincides with the axial centerline of the loudspeaker 120. When the voice coil is driven by an alternating current in the magnetic gap, it causes the diaphragm 1204a to reciprocate along the vibration axis X, thereby radiating sound waves in both forward and backward directions.

[0034] The first cavity 210 has an extension direction Y, which refers to the main direction in which the first cavity 210 extends from its connection with the sound cavity 111 to the distal end. For a regularly shaped first cavity 210, the extension direction Y can be defined as the direction of the central axis of the length direction of the first cavity 210; for a curved, bent, or irregularly shaped first cavity 210, the extension direction Y refers to the average direction of the overall extension from the beginning to the end of the cavity, which is used to characterize the path of sound wave propagation within the first cavity 210.

[0035] In this application, the vibration axis X and the extension direction Y are configured to be non-parallel. It should be noted that "non-parallel" encompasses various spatial relationships, such as the two direction vectors being perpendicular, forming an acute angle, or forming an obtuse angle. That is, the angle between the vibration axis X and the extension direction Y can be greater than 0° and less than 180°, as long as the conditions for parallelism or coincidence are not met. With this configuration, the extension of the first cavity 210 is no longer limited by the spatial constraints in the thickness direction of the display device. Instead, the more ample dimensions of the display device in the planar direction, such as the width or height direction, can be utilized to arrange the first cavity 210, thereby obtaining a longer effective acoustic length within a limited thickness and achieving resonance enhancement at lower frequencies.

[0036] In one specific implementation, such as Figures 1 to 3 As shown, the vibration axis X is set along the thickness direction of the display device, while the extension direction Y of the first cavity 210 is set along a direction parallel to the screen plane or back plate plane of the display device, and the two are approximately perpendicular.

[0037] It is understandable that, since the space in the thickness direction of a display device is usually limited, if the first cavity 210 is extended along the thickness direction, its length will be severely limited by the thickness dimension, making it difficult to effectively utilize low-frequency resonance. However, this application sets the first cavity 210 to extend in a direction away from the housing 110, and makes its extension direction Y not parallel to the vibration axis X, so that the first cavity 210 can be set along the width or height direction of the display device, thereby utilizing a larger space in the planar direction to meet the cavity length required for low-frequency resonance.

[0038] It should be noted that the angle between the vibration axis X and the extension direction Y is not limited to the aforementioned 90°. In other embodiments, as long as the non-parallel condition is met, the angle can be flexibly selected between 0° and 180° depending on the shape and distribution of the internal space of the display device.

[0039] For example, when the display device has a better layout margin in a certain direction, the arrangement angle of the additional structure 200 can be adjusted accordingly to adapt to different internal space layouts, making the projection length and orientation of the first cavity 210 in the planar direction more flexible.

[0040] In some specific implementations of this application, the extension path of the first cavity 210 can be straight, S-shaped, L-shaped, or bent. The first cavity 210 has a sound outlet 113 at a position communicating with the sound cavity 111 of the sound-emitting unit 100. The sound outlet 113 is used to guide sound waves from the speaker 120 into the first cavity 210, and the sound outlet hole is used to guide sound waves out of the first cavity 210.

[0041] A deflector can be installed at the sound outlet as needed to improve airflow noise and reduce wind noise. The deflector can adopt an arc-shaped guide surface or a grid structure to make the airflow smoother when it flows out of the sound outlet and avoid turbulence noise caused by airflow separation.

[0042] Furthermore, the airflow from the sound outlet can also be used to assist in heat dissipation for the entire display device. Specifically, when the speaker 120 vibrates, it pushes air to flow within the first cavity 210. This flowing air can exit from the sound outlet and blow towards heat sources inside the display device, such as the power board and motherboard, thereby assisting in heat dissipation. Thus, the technical solution of this application improves both bass performance and overall heat dissipation. The sound outlet can be positioned near components that generate significant heat, and the airflow can be guided to the target area through the direction design of the sound outlet to achieve precise heat dissipation.

[0043] In some embodiments, the cross-sectional area of ​​the first cavity 210 gradually increases from the end near the sound-generating unit 100 to the end away from the sound-generating unit 100, that is, the first cavity 210 has a gradually expanding shape along the direction of sound wave propagation. This gradually expanding structure can achieve a smooth transition of acoustic impedance, reduce sound wave reflection and sound energy loss caused by abrupt changes in cross-section, and allow more sound energy to propagate along the pipe to the far end, thereby improving sound radiation efficiency and improving low-frequency output performance.

[0044] The cross-sectional shape of the first cavity 210 is not limited to a circle; it can also be rectangular, elliptical, etc., to adapt to the flat internal space of the display device. The variation of the cross-sectional area can take various forms, such as linear, exponential, or parabolic, to meet the tuning requirements of different low-frequency response curves. It should be noted that the "gradual increase" described above refers to the overall trend of change, and slight fluctuations in the cross-sectional area are allowed in local sections due to structural avoidance or manufacturing tolerances, as long as the cross-sectional area at the far end is generally larger than that at the near end.

[0045] In other embodiments, the cross-sectional area of ​​the first cavity 210 can also remain constant, i.e., a uniform cross-section design is adopted. This solution has a simple structure and low manufacturing difficulty, and is suitable for scenarios where the resonant frequency has been accurately determined by the cavity length and the spatial layout is relatively regular, enabling reliable resonance enhancement at a low cost.

[0046] Furthermore, such as Figure 4The housing 110 includes a first housing portion 1101 and a second housing portion 1102 that are spliced ​​together. The speaker 120 is mounted on the second housing portion 1102, and the first housing portion 1101 covers the sound-emitting surface of the speaker 120.

[0047] The split shell 110, which is composed of a first shell 1101 and a second shell 1102, can significantly reduce the complexity of the mold and the difficulty of molding. In particular, for shells 110 with complex internal ribs or irregular cavities, the split design makes demolding more convenient and helps to improve production efficiency and yield.

[0048] Meanwhile, the split structure also facilitates subsequent acoustic tuning. When it is necessary to adjust the length, diameter or shape of the first connecting part 112, only the first shell part 1101 needs to be replaced, without replacing the entire shell 110, which reduces the design iteration cost.

[0049] Furthermore, the first shell 1101 and the second shell 1102 can be formed from different materials. For example, the first shell 1101 can be made of a material with better acoustic damping characteristics than the second shell 1102 to suppress pipe resonance, and the second shell 1102 can be made of a material with higher strength than the first shell 1101 to ensure the mounting rigidity of the speaker 120, thereby realizing the differentiated use of material performance.

[0050] In some embodiments, the additional structure 200 may be a separate component independent of the housing 110, or it may be an integrally formed or combined structure with other structures of the display device 1000, such as the back plate 400, the rear shell, etc. The connection between the additional structure 200 and the housing 110 may be a direct connection or an indirect connection through the third connecting portion 300.

[0051] like Figure 3 as well as Figure 4 As shown, in some specific implementations of this embodiment, the housing 110 includes a housing body and a first connecting portion 112. The housing body communicates with the first connecting portion 112, and the first connecting portion 112 forms a sound outlet 113. The first connecting portion 112 is connected to the additional structure 200. One end of the first connecting portion 112 communicates with the housing body, and the other end communicates with the first cavity 210. The cross-sectional area at the connection between the first connecting portion 112 and the first cavity 210 is less than or equal to the cross-sectional area of ​​the housing 110, and also less than or equal to the cross-sectional area of ​​the first cavity 210.

[0052] The first connecting portion 112 can be a tubular structure, cylindrical structure, or other protruding structure extending outward from the housing 110. The cross-sectional shape of the first connecting portion 112 can be circular, rectangular, elliptical, or other shapes. For example, the first connecting portion 112 is formed on the first housing portion 1101. Through the first connecting portion 112, sound waves generated at the front of the speaker 120 can propagate freely between the acoustic cavity 111 and the first cavity 210, thereby achieving acoustic coupling between the two cavities. By providing a dedicated acoustic channel through the first connecting portion 112 on the housing 110, the impact of opening a large opening on the housing 110 on the structural strength of the housing 110 is avoided. At the same time, the shape and size of the first connecting portion 112 can be independently optimized according to acoustic design requirements, providing more design freedom for precise tuning of the resonant frequency.

[0053] In some other specific implementations of this embodiment, the additional structure 200 includes an additional main body and a second connecting portion (not shown in the figure). The additional main body is connected to the second connecting portion, one end of the second connecting portion is connected to the housing 110, and the other end is connected to the additional main body. The cross-sectional area at the connection between the second connecting portion and the housing 110 is less than or equal to the cross-sectional area of ​​the additional main body and less than or equal to the cross-sectional area of ​​the housing 110.

[0054] In other words, the connection channel can be located on the additional structure 200 instead of the housing 110, while still achieving communication between the sound cavity 111 and the first cavity 210. The second connection part can be a tubular or other protruding structure extending from the additional structure 200 toward the housing 110. This solution is suitable for scenarios where the additional structure 200 itself has high structural strength, or where it is inconvenient to set a connection part on the housing 110, and offers layout flexibility.

[0055] For further specific implementations of this embodiment, please refer to... Figure 5 , Figure 5 This is a schematic diagram of a third structure of the sound-generating device provided in the embodiments of this application. The sound-generating device 10 may further include a separate third connecting portion 300. The third connecting portion 300 is connected to the housing 110 and the additional structure 200 respectively. The cross-sectional area of ​​the connection between the third connecting portion 300 and the housing 110 is less than or equal to the cross-sectional area of ​​the housing 110 and less than or equal to the cross-sectional area of ​​the additional structure 200.

[0056] By setting an independent third connection part 300, the processing difficulty of the housing 110 and the additional structure 200 can be reduced, and it is also convenient to flexibly replace the third connection part 300 of different specifications according to different product requirements.

[0057] The third connection 300 can be a tubular joint, adapter, or other form of intermediate connection structure. The connection methods between it and the housing 110 and the additional structure 200 include, but are not limited to, threaded connection, snap-fit ​​connection, adhesive bonding, welding, riveting, etc. The independent third connection 300 also facilitates the addition of acoustic treatment structures inside the channel, such as setting a sound-absorbing material layer or a turbulence structure on the inner wall to adjust the sound wave propagation characteristics.

[0058] In the embodiment described above, which includes an independent third connecting portion 300, the cross-sectional area of ​​the third connecting portion 300 gradually changes along the direction of sound wave propagation. Further, the cross-sectional area of ​​the third connecting portion 300 gradually increases along the direction of sound wave propagation, i.e., the third connecting portion 300 adopts a gradually expanding structure. One end of the third connecting portion 300 connected to the housing 110 forms a throat. The smaller cross-sectional design of this throat can serve as an acoustic impedance transformation point: when sound waves enter the third connecting portion 300 from the acoustic cavity 111, they first pass through the smaller cross-sectional throat, where the acoustic impedance changes, which is beneficial for the concentration and conversion of sound energy. Then, the sound waves propagate through the gradually expanding section to the first cavity 210, reducing reflection losses at the abrupt change in cross-section and enhancing the efficiency of sound wave energy transfer from the acoustic cavity 111 to the first cavity 210.

[0059] At the same time, the cross-sectional area of ​​the throat can also be used to adjust the resonant frequency of the entire extended cavity system, providing more tuning freedom for acoustic design.

[0060] In addition to the acoustic impedance matching function mentioned above, the variable cross-section design can also effectively extend the acoustic length of the resonant tube. According to the acoustic transmission line theory, in a pipe with a changing cross-section, the equivalent path length of sound wave propagation is greater than the actual physical length of the pipe. The mechanism is that the change in cross-section alters the propagation boundary conditions of sound waves in the pipe, causing the wavelength of the sound wave to be effectively stretched relative to the wavelength in a pipe with a constant cross-section when propagating in a pipe with a gradually changing cross-section.

[0061] In terms of acoustic effects, this equivalent extension means that, for the same physical length, a variable cross-section resonator can achieve a lower resonant fundamental frequency than a constant cross-section resonator. This is equivalent to achieving a longer resonator effect within a limited physical space, thereby achieving deeper bass response within the limited internal space of the display device 1000.

[0062] In some embodiments of this application, the sound-generating device further includes a sound-absorbing material (not shown in the figure), which is disposed in the sound cavity 111 and / or the first cavity 210 to absorb unnecessary standing waves and reflected sound in the cavity, reduce sound coloration, and make the final output sound purer.

[0063] The acoustic cavity 111 and / or the first cavity 210, after the addition of sound-absorbing material, exhibit an effective volume that is larger than its physical volume. Because the damping effect of the sound-absorbing material alters the reflection conditions of sound waves at the cavity boundaries, it is equivalent to increasing the acoustic boundary layer thickness at the cavity ends, thus increasing the effective volume and length of the entire resonant system and positively impacting the low-frequency response. It should be noted that the effect of the sound-absorbing material on the extremely low frequency range is mainly reflected in improving transient response and reducing bass trailing, resulting in a cleaner and crisper bass response.

[0064] The sound-absorbing material can be at least one of sponge, sound-absorbing cotton, foam plastic, particulate matter, and fiber material. For example, the particulate matter can be at least one of wood chips and sand; the fiber material can be at least one of glass fiber and polyester fiber.

[0065] In terms of arrangement, the sound-absorbing material can be attached to the inner wall of the acoustic cavity 111 and / or the first cavity 210, fill a local area of ​​the acoustic cavity 111 and / or the first cavity 210, or be shaped into a specific form and placed at locations where standing waves tend to accumulate, such as corners of the cavity, to maximize sound absorption efficiency within a limited cavity space. Its placement, shape, and quantity can be flexibly selected according to specific acoustic design requirements to balance sound absorption effect and low-frequency extension performance; no limitations are imposed here.

[0066] Please continue reading. Figure 4 In some embodiments of this application, the housing 110 is provided with a plurality of first ribs 114. The first ribs 114 are reinforcing structures protruding from the surface of the housing 110, used to improve the structural strength and rigidity of the housing 110, and prevent the housing 110 from resonating or vibrating under the vibration excitation of the speaker 120, thereby ensuring the purity of the sound quality. The first ribs 114 can be provided on the outer surface of the housing 110 or on the inner surface of the housing 110, i.e., the inner wall of the sound cavity 111. The specific position can be determined according to the structural reinforcement requirements and the internal space layout of the cavity.

[0067] In some specific implementations of this application, such as Figure 4 As shown, multiple first ribs 114 are arranged in an alternating manner. Each first rib 114 includes a first rib segment 1141 and a second rib segment 1142, which are arranged in an alternating manner. The alternating arrangement means that the first rib segments 1141 and the second rib segments 1142 intersect or cross each other in space, forming a grid-like or grid-like structure.

[0068] This staggered rib structure significantly improves the bending and torsional stiffness of the shell 110 in multiple directions, reducing local deformation and overall resonance of the shell 110 under the vibration excitation of the speaker 120. The included angle between the first rib segment 1141 and the second rib segment 1142 can be set according to actual structural requirements. For example, they can intersect perpendicularly to form an orthogonal grid, or they can intersect at other angles to form an oblique grid, to adapt to different force directions and spatial constraints. The number of the first rib segment 1141 and the second rib segment 1142 can be equal or unequal, depending on the reinforcement requirements of each region of the shell 110.

[0069] In some specific implementations of this application, the first rib 114 is disposed within the acoustic cavity 111. The height of the first rib segment 1141 protruding from the cavity wall of the acoustic cavity 111 is a first height, and the height of the second rib segment 1142 protruding from the cavity wall of the acoustic cavity 111 is a second height, with the first height being less than the second height. That is, the two sets of rib segments arranged in an alternating manner have different heights, with one set of rib segments being lower and the other set being higher. This design of differentiated heights takes into account the balance between structural strength and acoustic performance: the air inside the acoustic cavity 111 will flow when the loudspeaker 120 vibrates. If the rib height is too high, it may obstruct the air flow and affect the acoustic effect; if the height is too low, the structural strengthening effect will be limited.

[0070] By setting the first rib segment 1141 lower and the second rib segment 1142 higher, a channel for airflow can be preserved while ensuring the main structural strength, reducing the negative impact on flow resistance. Specifically, the lower first rib segment 1141 provides auxiliary reinforcement, while the higher second rib segment 1142 provides primary reinforcement, allowing air to flow more smoothly above the lower first rib segment 1141. Furthermore, the cross-sectional shapes of the first rib segment 1141 and the second rib segment 1142 can be designed separately. For example, the first rib segment 1141 can use a cross-section with a rounded top transition to further reduce flow resistance, while the second rib segment 1142 can use a trapezoidal cross-section to obtain a larger section modulus at the same height, improving bending resistance.

[0071] In some specific implementations of this application, the extension direction of the first rib segment 1141 is the same as or approximately the same as the airflow direction inside the sound cavity 111, and the extension direction of the second rib segment 1142 is different from the airflow direction inside the sound cavity 111, for example, perpendicular or intersecting.

[0072] Thus, the first rib segment 1141, because its extension direction is consistent with the airflow direction, has less obstruction to the airflow; although the second rib segment 1142 has some obstruction to the airflow, since it plays a major role in structural reinforcement, its number, spacing and distribution position can be reasonably designed to balance structural strength and acoustic performance.

[0073] Please see Figure 3 and Figure 4 In some embodiments of this application, the sound-generating device further includes a first plate 130, which is disposed on the housing 110, and at least a portion of the first plate 130 is disposed opposite to the speaker 120.

[0074] The first plate 130 can be made of metal sheet such as steel plate, aluminum plate, or other high-rigidity materials to increase the local rigidity of the housing 110 at the corresponding position of the speaker 120. When the speaker 120 is working, the diaphragm 1204a vibrates to generate a reciprocating driving force, which is transmitted to the housing 110 through the air and structure. If the local rigidity of the housing 110 is insufficient, deformation and displacement may occur in that area as the vibration frequency changes, thereby radiating unnecessary structural noise, i.e., vibration, which affects the sound quality.

[0075] The first plate 130 can effectively increase the rigidity of the housing 110 in the area corresponding to the speaker 120, suppress deformation and vibration response in this area, and thus reduce noise. Specifically, the first plate 130 can be disposed at the sound outlet surface of the housing 110 corresponding to the speaker 120. Since the sound outlet surface area is the main path for sound waves to radiate outward, the vibration of the housing 110 in this area has the most direct impact on sound quality, and the enhancement effect is most significant here.

[0076] In some specific implementations of this application, the first plate 130 is disposed on the outer surface of the housing 110, serving as a reinforcing component on the exterior of the housing 110. The speaker 120 is mounted inside the acoustic cavity 111, and its diaphragm 1204a vibrates, generating alternating pressure on the inner wall of the housing 110, particularly the inner wall directly opposite the diaphragm 1204a. By providing the first plate 130 at a corresponding position on the outer surface of the housing 110, this area can be effectively supported, reducing local deformation and vibration transmission in that area.

[0077] In some specific implementations of this application, a recessed platform 115 is provided on the housing 110, and at least a portion of the first plate 130 is embedded in the recessed platform 115. The recessed platform 115 is a recessed area formed on the surface of the housing 110, and its shape and size match at least a portion of the first plate 130. By embedding at least a portion of the first plate 130 in the recessed platform 115, the first plate 130 can be flush or substantially flush with the surface of the housing 110, reducing space occupation and resulting in a cleaner appearance. The first plate 130 can be fixed in the recessed platform 115 by means of bonding, screw connection, riveting, etc. The bottom of the recessed platform 115 can be further provided with positioning protrusions or positioning grooves to facilitate quick positioning and alignment of the first plate 130 during installation, improving assembly efficiency.

[0078] In some specific implementations of this application, the first plate 130 is disposed on the housing 110 opposite to the speaker 120, that is, the projection of the speaker 120 along the vibration axis X onto the housing 110 at least partially coincides with the first plate 130. When the speaker 120 vibrates within the sound cavity 111, the alternating pressure on the inner wall of the sound cavity 111 directly opposite the diaphragm 1204a of the speaker 120 is the greatest. Therefore, placing the first plate 130 at this position can most effectively reduce vibration. It is understood that the shape and size of the first plate 130 can be adapted to the shape and size of the diaphragm 1204a of the speaker 120 to provide sufficient reinforcement while avoiding material waste.

[0079] In some specific implementations of this application, a damping pad or damping material may be provided between the first plate 130 and the shell 110 to further absorb vibration energy and reduce noise. The damping pad may be made of elastic materials such as rubber or silicone, and the damping material may be made of butyl rubber, asphalt-based damping sheets, etc. Both can convert some of the vibration energy into heat energy and dissipate it, thereby improving the vibration reduction effect.

[0080] Please see Figure 6 , Figure 6 This is a first structural schematic diagram of a display device provided in an embodiment of this application. This display device can be applied to electronic devices with display functions such as televisions, computer monitors, tablet computers, electronic photo frames, and advertising display terminals, and is especially suitable for thin products where thickness is a requirement.

[0081] The display device 1000 also includes a back plate 400. The back plate 400 can be a metal plate, used to support the internal structure, and has high structural strength and rigidity.

[0082] In this embodiment, the sound-emitting unit 100 is disposed on the back plate 400. Combined with... Figure 3 The diaphragm 1204a of the speaker 120 has a vibration axis X, which is perpendicular to the plane of the back plate 400, that is, the vibration direction of the diaphragm 1204a is perpendicular to the surface of the back plate 400. Unlike the structure of a traditional TV speaker, the speaker 120 in this embodiment is not positioned facing outwards from the display device 1000, but rather its diaphragm 1204a is positioned facing the back plate 400.

[0083] This arrangement offers several advantages. First, with the speaker 120 facing the back panel 400, the space between the back panel 400 and the rear shell can be fully utilized for acoustic tuning and sound wave guidance, allowing sound to radiate outwards along a specific path. This achieves superior acoustic design without increasing the thickness of the display device 1000. Second, the back of the speaker 120, i.e., the magnetic circuit system side, faces outwards from the display device 1000. As one of the main heat sources, the magnetic circuit system's outward orientation facilitates heat dissipation through convection and radiation, effectively reducing operating temperature rise and ensuring the speaker 120's reliability and stable performance during long-term operation. Furthermore, and more importantly, when the additional structure 200 is also fixed to the back panel 400, its first cavity 210 can easily connect with the front space of the speaker 120, providing a more direct structural path for constructing the expanded cavity. This is beneficial for the compact integration and performance optimization of the acoustic system.

[0084] In some specific implementations of this embodiment, the housing 110 and the back plate 400 together enclose and form the sound cavity 111. Specifically, the housing 110 may adopt a cover-like structure with an opening, the edge of which is sealed to the back plate 400, thereby forming a closed or semi-closed space together with the back plate 400 for use as the sound cavity 111.

[0085] This structural design brings multiple technical benefits. First, the enclosure of the housing 110 with the back plate 400 effectively reduces the amount of material used in the housing 110, lowering costs and overall weight. Second, the back plate 400, as a highly flat and rigid metal stamped part, can directly serve as a stable reflective surface for the sound waves radiated from the front of the speaker 120, avoiding acoustic nonlinear distortion caused by deformation of the housing 110. Furthermore, the back plate 400 has a high elastic modulus and damping characteristics different from the plastic housing 110, making it less prone to structural resonance under the vibration of the speaker 120. This effectively suppresses sound coloration and noise caused by cabinet resonance, improving sound purity.

[0086] In the above embodiments, the sealed connection between the housing 110 and the back plate 400 can be achieved in a variety of ways, such as by providing a sealing gasket or sealant between the opening edge of the housing 110 and the back plate 400, or by achieving a seal through a tight fit between the opening edge and the back plate 400, so as to ensure the airtightness of the sound cavity 111 and protect the acoustic performance of the speaker 120.

[0087] In some specific implementations of this embodiment, the display device 1000 further includes a shock-absorbing motor (not shown in the figure), which is disposed on the same side of the back plate 400 as the sound-generating unit 100. The shock-absorbing motor is mounted on a corresponding motor mounting base on the back plate 400 and arranged on the same side as the sound-generating unit 100, which is beneficial for centralized management of wiring and a neat layout of the internal space of the whole machine.

[0088] When the sound-generating unit 100 is working, the diaphragm 1204a of the speaker 120 reciprocates under the drive of the voice coil. According to Newton's third law, the movement of the diaphragm 1204a generates a reaction force in the opposite direction on the magnetic circuit system of the speaker 120 and the housing 110. This reaction force is transmitted through the housing 110 to the back plate 400, thereby exciting the vibration response of the back plate 400 and the entire structure. When the back plate 400 vibrates under the excitation of this reaction force, it radiates unnecessary structural noise into the surrounding air. The vibration energy may also be conducted to other components of the display device 1000, such as the backlight module and circuit board, generating additional noise or interfering with the normal operation of the components. This structural reaction vibration is particularly significant when low-frequency, high-amplitude signals are input, which has a significant impact on sound quality and overall reliability.

[0089] The vibration damping motor is used to output a compensating force under the drive of the controller to actively suppress the structural vibration transmitted to the back plate 400 when the sound unit 100 is working. Through this active compensation mechanism, the structural vibration of the back plate 400 caused by the operation of the sound unit 100 can be effectively reduced, thereby reducing the overall vibration noise and improving the clarity and purity of the sound quality.

[0090] The number of vibration damping motors can be one or more. When a single vibration damping motor is used, the structure is simple and the cost is low, making it suitable for scenarios with a single vibration mode. When multiple vibration damping motors are used, they can be arranged at different positions on the back plate 400 to perform multi-point coordinated compensation for different vibration modes, achieving a more comprehensive vibration suppression effect and further improving the acoustic performance and structural stability of the whole machine.

[0091] In this application, there are several possible ways to form the additional structure 200, which will be described below.

[0092] Please see Figure 7 , Figure 7 This is a schematic diagram of the pipeline structure provided in an embodiment of this application.

[0093] In some embodiments of this application, the additional structure 200 is a pipe structure 500. The pipe structure 500 can be fixed to the back plate 400 or to the rear shell. The fixing method of the pipe structure 500 depends on the internal spatial layout of the display device 1000 and the relative positional relationship between the back plate 400 and the rear shell. When the pipe structure 500 is fixed to the back plate 400, its relative position with the sound-emitting unit 100 is relatively stable, and the assembly accuracy is easy to ensure; when the pipe structure 500 is fixed to the rear shell, it can be disassembled and installed as a whole with the rear shell, which is convenient for maintenance and replacement.

[0094] The cross-sectional shape of the pipe structure 500 can be circular, rectangular, elliptical, or other shapes. A circular cross-section pipe has a smooth inner wall, low flow resistance, and low sound energy loss; a rectangular or elliptical cross-section is more conducive to arrangement in a thin space and can make full use of the flat gap inside the display device 1000. The inner cavity of the pipe structure 500 is the first cavity 210, one end of which is directly connected to the housing 110 of the sound-emitting unit 100 or connected through the third connecting part 300, and the other end can be closed or open, for example, by providing a sound outlet 501.

[0095] In some embodiments of this application, the additional structure 200 may be arranged around the periphery of the sound-emitting unit 100, that is, the pipe structure 500 may extend along the circumference of the sound-emitting unit 100 to form a ring-shaped or partially ring-shaped pipe surrounding the sound-emitting unit 100. In the display device 1000, the sound-emitting unit 100 is usually disposed in the receiving space between the back plate 400 and the rear shell, and its periphery often has a relatively ample planar space available for use. By arranging the pipe structure 500 around the periphery, a longer pipe length and a larger additional cavity volume can be obtained without increasing the thickness of the display device 1000.

[0096] When the duct structure 500 is arranged in a surround configuration, its shape can be circular, rectangular, elliptical, or other shapes, depending on the contours of the available space around the speaker unit 100. The duct structure 500 can be a single complete loop or a multi-loop spiral. Multi-loop spirals can further increase the duct length within a limited space, thereby shifting the resonant frequency to a lower frequency band and achieving a deeper bass effect. For spiral duct structures 500, an appropriate spacing should be maintained between adjacent loops to avoid crosstalk between adjacent ducts, while also facilitating airflow and heat dissipation.

[0097] One end of the pipe structure 500 can be connected to the shell 110 through the first connecting part 112, that is, the sound outlet 113 formed by the first connecting part 112 connects the sound cavity 111 to the first cavity 210.

[0098] When a sound outlet 501 is provided at the other end of the pipe structure 500, sound waves can radiate outward from the sound outlet 501. This utilizes the first cavity 210 as an expanded volume to enhance the bass effect. The air in front of the speaker 120 forms an air spring effect in the pipe, effectively increasing the air volume of the speaker 120 and making the low frequencies extend deeper. Furthermore, the sound radiation from the sound outlet 501 is used to enhance the sound pressure output in a specific frequency band. The air column inside the pipe structure 500 resonates at a specific frequency. During resonance, the airflow velocity at the sound outlet 501 reaches its maximum, and the outward radiated sound energy is correspondingly enhanced, thus obtaining additional sound pressure gain near the resonant frequency. The position of the sound outlet 501 can be set at the end or side wall of the pipe structure 500 according to product requirements. When set on the side wall, sound waves radiate laterally from the pipe, which is beneficial for the sound to further mix inside the entire unit before propagating outward, resulting in a more uniform sound field distribution.

[0099] The duct structure 500 can be made of metal materials such as aluminum and steel, plastic materials, or other suitable materials. Metal duct structures 500 offer high rigidity and are less prone to resonance, making them suitable for products with high sound quality requirements. Plastic duct structures 500 are lightweight, easy to mold, and have lower costs, making them suitable for mass production. The wall thickness, length, inner diameter, and other parameters of the duct structure 500 can be selected according to specific acoustic design requirements.

[0100] Generally speaking, the longer the pipe structure 500 is and the larger its inner diameter, the greater the additional air volume it provides and the more obvious the bass enhancement effect. However, the limitations of the internal space of the display device 1000 must be considered at the same time.

[0101] In some embodiments, the conduit structure 500 can extend in one direction, that is, in a straight line from one side of the sound-generating unit 100 to the distal end. This unidirectional conduit structure 500 is simple in design, easy to manufacture, has the shortest sound wave propagation path, and low energy loss, making it suitable for scenarios where there is sufficient continuous space available in one direction within the display device 1000.

[0102] In other embodiments, the pipe structure 500 can be bent or extended in a curved shape, such as an L-shape, U-shape, or S-shape, to allow for a more circuitous arrangement within a limited irregular space, thereby achieving a longer effective pipe length. Rounded corners can be used at bends instead of right angles to reduce sound wave reflection loss and eddy current noise at the bends, thus improving sound energy transmission efficiency.

[0103] In some embodiments of this application, the pipe structure 500 may be fixed to the back plate 400.

[0104] When the pipe structure 500 is made of metal, it can be fixed to the back plate 400 by means of pin connection, screw connection or welding.

[0105] When the pipe structure 500 is made of plastic, it can be fixed to the back plate 400 by means of snap-fit ​​connection, adhesive or screw connection.

[0106] In addition, the back plate 400 is pre-set with positioning ribs or positioning grooves. After the pipe structure 500 is embedded in the positioning groove, it is reinforced by auxiliary fasteners such as fixing adhesive and clips to ensure that the relative position between the pipe structure 500 and the back plate 400 is accurate and the connection is reliable. The depth of the positioning groove can be designed to match the outer diameter of the pipe structure 500, so that the outer surface of the pipe structure 500 is basically flush with the surface of the back plate 400 after it is embedded, thereby further reducing the thickness occupied by the display device 1000.

[0107] Specifically, a first groove is provided on the back plate 400 or the housing 110, and at least a portion of the pipe structure 500 is disposed within the first groove. By providing a groove on the back plate 400 or the housing 110 to accommodate at least a portion of the pipe structure 500, the space occupied by the pipe structure 500 in the thickness direction of the display device 1000 can be reduced. The first groove can be formed by stamping (for metal back plates 400), injection molding (for plastic back plates 400 or housings 110), milling, or other methods.

[0108] After the pipe structure 500 is installed in the first groove, it can be fixed by means of adhesive, clips, screws, etc., to ensure that the pipe structure 500 will not shift or loosen due to vibration during the use of the display device 1000. For the adhesive fixing method, structural adhesive or double-sided tape can be applied between the pipe structure 500 and the inner wall of the groove. The adhesive layer also has a certain damping effect, which can absorb some vibration energy and reduce the vibration noise of the pipe structure 500 itself. For the clip or screw fixing method, it has the advantage of being detachable, facilitating later maintenance and replacement.

[0109] In some embodiments, please refer to Figure 8 , Figure 8 This is a second structural schematic diagram of the display device provided in an embodiment of this application. The display device 1000 further includes a back plate 400. The additional structure 200 utilizes the existing second rib 410 on the back plate 400 to form a first cavity 210, thereby expanding the cavity with virtually no additional cost.

[0110] Specifically, at least one second rib 410 is formed on the back plate 400. The second rib 410 is an elongated protrusion formed on the back plate 400 by stamping, which is mainly used to enhance the structural strength and rigidity of the back plate 400. It can be understood that the material undergoes plastic deformation under the action of the stamping die, and the protrusion and the depression are formed simultaneously on both sides in the thickness direction of the plate.

[0111] Please see Figure 8 as well as Figure 9 , Figure 9 for Figure 8 A magnified schematic diagram of part A. The second rib 410 forms a corresponding groove 420 on the back plate 400. That is, when viewed from one side of the back plate 400, the second rib 410 is raised; when viewed from the other side of the back plate 400, the corresponding position forms a recessed groove 420.

[0112] The second rib 410 can be straight, curved, S-shaped, L-shaped, ring-shaped, double-ring-shaped, or other shapes. Since the second rib 410 is itself part of the stamped structure of the back plate 400, using the second rib 410 to form the first cavity 210 does not require additional material costs. The cross-sectional shape of the second rib 410 can be trapezoidal, arc-shaped, or rectangular. Ribs with different cross-sectional shapes provide structural reinforcement, and the internal spatial shape of their corresponding grooves 420 also differs, thus affecting the acoustic characteristics of the first cavity 210. For example, the groove formed by a trapezoidal cross-section rib has inclined sidewalls, which helps to reduce right-angle reflection of sound waves in the groove; an arc-shaped cross-section rib has smooth inner walls, resulting in lower sound energy loss.

[0113] The additional structure 200 includes at least a portion of the second rib 410 and a closure 430. The closure 430 is connected to the back plate 400 and closes at least a portion of the groove 420 corresponding to the second rib 410. The closed groove 420 forms a first cavity 210. That is, the groove 420 itself is an open slot-shaped space, and after its opening is closed by the closure 430, a closed cavity is formed, which is the first cavity 210. The first cavity 210 communicates with the sound cavity 111 of the sound-producing unit 100 through a corresponding sound outlet 113, specifically through the sound outlet 113 formed by the first connecting part 112 on the housing 110.

[0114] "At least a portion" of the second rib 410 means that the effective length of the first cavity 210 can utilize a portion of the entire second rib 410. For example, when the total length of a second rib 410 is greater than the resonant tube length required for acoustic design, only a portion of the groove 420 corresponding to the rib can be closed to form the first cavity 210, while the unclosed portion can still be retained as an open groove structure; or, when a local area of ​​a rib is unsuitable for closure due to structural avoidance or other reasons, only a suitable section can be selected to form the first cavity 210. The first rib, i.e., the second rib 410, on the back plate 400 is traditionally used only for structural reinforcement. In this application, it is combined with the closure member 430 to transform it into part of the acoustic cavity, thus achieving the integration of structural and acoustic functions.

[0115] The closure 430 can take various structural forms. For some specific implementations in this application, please refer to... Figure 10 , Figure 10 This is a schematic diagram of the structure of the closure component provided in an embodiment of this application. The closure component 430 includes a first connecting structure 431 and a second connecting structure 432. The first connecting structure 431 is correspondingly disposed within the groove 420 and is connected to the inner wall of the groove 420. Specifically, the second connecting structure 432 is correspondingly disposed at the opening of the groove 420 to seal the groove 420.

[0116] Therefore, the closure 430 can simultaneously connect and seal with the back plate 400 from both the inner wall and the opening of the groove 420, resulting in higher sealing reliability. The outer contour of the first connecting structure 431 can be adapted to the cross-sectional shape of the inner wall of the groove 420, so that after the first connecting structure 431 is embedded in the groove 420, a tight fit is formed between the two, which improves both sealing performance and connection strength. In some cases, the second connecting structure 432 can also extend outward to form a flange structure. The flange fits against the surface of the back plate 400 and can be fixed by multiple screws or adhesive points, resulting in uniform stress and preventing loosening due to vibration. Furthermore, a sound hole 501 can be provided on the first connecting structure 431.

[0117] The connection between the closure 430 and the back plate 400 can be achieved through methods including, but not limited to, screw connection, bonding, welding, and riveting. To ensure the airtightness of the groove 420 after it is sealed, a sealing structure, such as compressed foam, sealing gaskets, or sealant, can be provided between the closure 430 and the back plate 400. Compressed foam has good elasticity and sealing performance, and can form a reliable airtight seal between the closure 430 and the back plate 400 to prevent air leakage from the first cavity 210.

[0118] In some specific implementations of this application, such as Figure 9As shown, a step 421 is provided on the inner wall of the groove 420, and the sealing member 430 is connected to the step 421. The step 421 provides positioning and support for the sealing member 430, facilitating its installation and fixation. Simultaneously, the step 421 increases the contact area between the sealing member 430 and the inner wall of the groove 420, which helps improve the sealing effect. The sealing member 430 can be connected to the upper surface of the step 421 or to the side wall of the step 421.

[0119] The step 421 can also be set at different depths from the groove opening to accommodate closures 430 of different thicknesses, or to provide multiple options for the installation of closures 430.

[0120] In some embodiments of this application, the back plate 400 includes a first plate and a second plate. At least one groove is provided on the first plate and / or the second plate. When the first plate and the second plate are fitted together, the closed groove forms a first cavity 210.

[0121] Specifically, the first plate is a stamped metal backplate 400, on which a first rib is formed by stamping, and the first rib forms a corresponding groove on the backplate 400. The second plate is fitted onto the inner side of the first plate, i.e., the side facing the interior of the display device 1000. The first and second plates can be fixed together by welding, bonding, screws, or other methods. When the second plate is fitted onto the first plate, the second plate closes the opening of the groove on the first plate, thereby forming a closed or near-closed first cavity 210. Before being fitted onto the first plate, the second plate can be coated with a damping coating on its surface facing the first plate to further suppress structural vibration and improve sound quality purity.

[0122] In other words, the second rib 410 on the first plate is traditionally used only for structural reinforcement. In this application, the second plate closes its opening, transforming it into a composite structure that combines structural reinforcement and acoustic cavity functions, thus achieving a fusion of structural and acoustic functions. Simultaneously, since the second plate is fitted to the inner side of the first plate, the opening of the groove is closed by the second plate, and the first cavity 210 is formed inside the back plate 400, without occupying additional space outside the back plate 400, which is beneficial for the thinner design of the display device 1000.

[0123] The second plate can be made of steel, stainless steel, or other materials, thereby increasing the structural strength of the composite back panel 400 and improving its resistance to plastic deformation. Simultaneously, the second plate improves the flatness of the inner side of the back panel 400, facilitating the attachment of the lamp panel in the display device 1000 and enhancing display stability. After the second plate is bonded to the first plate, the composite structure formed by them exhibits significantly higher overall bending stiffness than a single-layer plate under bending loads due to the synergistic force distribution between the two plates through connection points or adhesive layers. This makes the overall structure of the display device 1000 more stable.

[0124] In some specific implementations of this application, the groove can be provided on the first plate, on the second plate, or on both the first and second plates. When grooves are provided on both plates, after the two plates are attached, the grooves align with each other and together form a larger cavity, which serves as the first cavity 210.

[0125] The cavity volume formed by aligning the grooves on the two plates is larger than that of a single-layer groove, which helps to obtain a larger additional air volume within a limited space, further enhancing the bass enhancement effect. The shape, size, and number of grooves can be designed according to the required volume of the first cavity 210 and the structural reinforcement requirements.

[0126] The cross-sectional shape of the groove can be U-shaped, V-shaped, trapezoidal or other shapes, and its extension path can be straight, curved, circular or grid-like.

[0127] Multiple grooves can be arranged in parallel or intersecting patterns to form a grid-like reinforcement structure, thereby improving the bending and torsional stiffness of the backplate 400 in multiple directions. The grooves can be interconnected or independent, depending on the specific acoustic and structural design requirements.

[0128] In some embodiments of this application, the additional structure 200 utilizes a structure on the rear shell to form the first cavity 210. The rear shell has a recessed structure. The recessed structure can be a recessed area formed during injection molding or stamping of the rear shell, or it can be a recessed area formed on the rear shell through subsequent processing.

[0129] The additional structure 200 includes at least a portion of the recessed structure and a third connector. The third connector is connected to the rear shell and closes at least a portion of the recessed structure. The closed portion of the recessed structure forms a first cavity 210.

[0130] Similar to the above scheme utilizing the second rib 410 of the back plate 400, the connection method between the third connector and the rear shell may include, but is not limited to, screw connection, bonding, welding, riveting, etc.

[0131] To ensure the airtightness of the recessed structure after it is sealed, a sealing structure can be set between the third connector and the rear shell, such as compressed foam, sealing gaskets, sealant, etc.

[0132] By utilizing the recessed structure on the rear shell to form the first cavity 210, the structural space of the rear shell itself can be fully utilized without adding additional components or occupying extra internal space. Furthermore, the rear shell is typically made of injection-molded plastic, offering a high degree of freedom in shape design. The recessed structure can be designed into various shapes and sizes as needed, providing significant flexibility. Compared to the backplate 400, the injection molding process of the plastic rear shell makes it easier to achieve complex curved surfaces and groove structures. Therefore, there are fewer restrictions on the shape design of the recessed structure, allowing for a more optimized acoustic cavity layout.

[0133] In some specific implementations of this application, the recessed structure can be an elongated groove, an annular groove, a mesh-like groove, or a groove of other shapes formed on the rear shell. The depth, width, length, and other parameters of the recessed structure can be designed according to the required volume of the first cavity 210.

[0134] There can be one or multiple recessed structures. When there are multiple recessed structures, they can be interconnected or independent but each connected to the sound cavity 111. When multiple recessed structures are interconnected, the multiple recesses are connected in series to form a larger cavity, in which the sound waves travel a longer path and the resonant frequency is lower. When multiple recessed structures are independent but each connected to the sound cavity 111, it is equivalent to multiple resonant tubes connected in parallel, each with a different resonant frequency, which can achieve multi-band resonance enhancement, making the low-frequency response flatter and richer.

[0135] In summary, this application achieves flexible configuration of the additional structure 200 through various methods. It can utilize an independent pipe structure 500, the second rib 410 on the back plate 400, a recessed structure on the rear shell, or even a scheme where the first and second plates are combined to form a cavity. Each implementation method has its advantages and can be selected based on the specific structural space, cost requirements, and acoustic performance goals of the display device 1000, achieving optimal bass enhancement within a limited space. Regardless of the method used, the core principle is to expand the equivalent air volume of the speaker 120 through the connection between the first cavity 210 and the sound cavity 111, thereby reducing the low-frequency resonant frequency and increasing the bass depth, while simultaneously meeting the requirements of a thin and compact design for the display device 1000.

[0136] Please see Figure 8In some embodiments of this application, there are multiple additional structures 200, and the first cavities 210 of the multiple additional structures 200 are all connected to the acoustic cavity 111 of the same sound-generating unit 100. That is, a sound-generating unit 100 can be connected to multiple additional structures 200 at the same time, and each additional structure 200 provides a first cavity 210 as an extension cavity. At this time, the total cavity volume of the sound-generating unit 100 is the sum of the volume of the acoustic cavity 111 and the volume of the multiple first cavities 210, which can obtain a larger equivalent air volume, thereby further improving the bass depth. For example, the multiple first cavities 210 can be connected to the acoustic cavity 111 respectively through the sound outlet 113 formed by the first connecting part 112 provided on the housing 110, and the connection method is consistent with the aforementioned additional structure 200 scheme.

[0137] Multiple additional structures 200 can be evenly distributed circumferentially around the sound-generating unit 100. For example, when there are four additional structures 200, they can be respectively positioned in the upper, lower, left, and right directions of the sound-generating unit 100, with an angle of approximately 90 degrees between adjacent additional structures 200. This evenly distributed arrangement allows the reaction forces from each additional structure 200 on the sound-generating unit 100 to balance each other, reducing the overall vibration of the sound-generating unit 100 during operation.

[0138] Of course, the arrangement of the multiple additional structures 200 is not limited to a uniform distribution; they can also be non-uniformly distributed according to the internal spatial layout of the display device 1000. For example, when certain areas inside the display device 1000 have a large amount of unused space, more additional structures 200 or larger additional structures 200 can be arranged in these areas.

[0139] Multiple additional structures 200 can have the same shape and size, or they can have different shapes and sizes. Different additional structures 200 can be formed in different ways. For example, some additional structures 200 can be formed using the second rib 410 on the back plate 400 in conjunction with the closure 430; another part of the additional structures 200 can be formed using the recessed structure on the rear shell; and yet another part of the additional structures 200 can be formed using independent pipe structures 500. This hybrid approach using multiple forming methods can be flexibly designed according to the specific structure of the display device 1000, maximizing the use of internal space and achieving an optimal balance between acoustic performance and structural compactness. When multiple additional structures 200 have different effective lengths or cross-sectional shapes, their corresponding resonant frequencies are different, enabling resonance enhancement across multiple frequency bands and resulting in a flatter and richer low-frequency response.

[0140] In other embodiments of this application, please refer to Figure 11 and Figure 12 , Figure 11This is a schematic diagram of a third structure of the display device provided in the embodiments of this application. Figure 12 This is a schematic diagram of a fourth structure of the display device provided in the embodiments of this application. There are multiple sound-emitting units 100 and multiple additional structures 200, with each sound-emitting unit 100 and each additional structure 200 connected in a one-to-one correspondence. That is, each sound-emitting unit 100 is connected to at least one corresponding additional structure 200, and cavity expansion is achieved through its corresponding additional structure 200. This solution is suitable for scenarios where multiple sound-emitting units 100 need to be provided in the display device 1000, such as having one bass unit in each of the left and right channels, or providing multiple bass units to enhance the overall bass effect.

[0141] For more details on specific implementations of this application, please refer to [link / reference]. Figure 11 and Figure 12 The display device 100 has two sound-emitting units 100, including a first sound-emitting unit 101 and a second sound-emitting unit 102. The diaphragm 1204a of the speaker 120 of the first sound-emitting unit 101 faces opposite directions to the diaphragm 1204a of the speaker 120 of the second sound-emitting unit 102. That is, the speakers 120 of the first sound-emitting unit 101 and the second sound-emitting unit 102 are arranged in opposite directions. This back-to-back arrangement allows the vibrations generated by the two sound-emitting units 100 during operation to cancel each other out, thereby reducing the vibration of the entire display device 1000.

[0142] Specifically, when the diaphragm 1204a of the speaker 120 of the first sound-emitting unit 101 vibrates in one direction, it generates a reaction force on the display device 1000; while when the diaphragm 1204a of the speaker 120 of the second sound-emitting unit 102 vibrates in the opposite direction, it generates a reaction force in the opposite direction on the display device 1000. The two reaction forces superimpose and cancel each other out, thereby reducing the overall vibration of the display device 1000. Furthermore, the additional structures 200 corresponding to the two sound-emitting units 100 can also be symmetrically arranged on both sides of the back plate 400, making the overall structure more evenly stressed.

[0143] In some specific implementations of this application, there are two additional structures 200, including a first additional structure 201 and a second additional structure 202. The first cavity 210 of the first additional structure 201 and the first cavity 210 of the second additional structure 202 have different volumes. That is, although each of the two sound-producing units 100 is connected to an additional structure 200, the expanded cavity volumes provided by the two additional structures 200 can be different. In this way, corresponding additional structures 200 can be designed according to the different acoustic requirements of the two sound-producing units 100.

[0144] For example, the first cavity 210 of the first additional structure 201 has a longer effective length and a larger volume to match the low-frequency resonance requirements of the first sound-generating unit 101; the first cavity 210 of the second additional structure 202 has a shorter effective length and a smaller volume to match the mid-to-low frequency resonance requirements of the second sound-generating unit 102. In this way, the two sound-generating units 100 can achieve optimal resonance enhancement effects in different frequency bands, effectively widening the overall low-frequency response range. Furthermore, the cross-sectional areas of the two additional structures 200 can be the same, while the lengths of the first cavities 210 can differ, thus achieving a volume difference.

[0145] In terms of layout, such as Figure 11 As shown, the diaphragm 1204a of the speaker 120 of the first sound-emitting unit 101 faces the same direction as the extension direction of the corresponding first additional structure 201, and the diaphragm 1204a of the speaker 120 of the second sound-emitting unit 102 faces the same direction as the extension direction of the corresponding second additional structure 202. This unidirectional arrangement allows sound waves to travel along a straight propagation path after entering the additional structure from the sound-emitting unit, resulting in the shortest path and lowest energy loss. It is suitable for scenarios where the internal space is relatively regular and a continuous straight-line space can be obtained in a certain direction.

[0146] In another arrangement, such as Figure 12 As shown, the diaphragm 1204a of the speaker 120 of the first sound-emitting unit 101 is oriented differently from the extension direction of the corresponding first additional structure 201 (e.g., perpendicular to each other), and the diaphragm 1204a of the speaker 120 of the second sound-emitting unit 102 is also oriented differently from the extension direction of the corresponding second additional structure 202, for example, perpendicular. This anisotropic arrangement allows for a more flexible wiring layout within the limited internal space of the display device 1000.

[0147] For some specific implementations of this application, please refer to Figure 13 , Figure 13 This is a fifth structural schematic diagram of the display device provided in this application embodiment. The first sound-emitting unit 101 includes a third housing 1103 and M first speakers 121, and the second sound-emitting unit 102 includes a fourth housing 1104 and K second speakers 122. Wherein, M is a positive integer not less than 2, and K is a positive integer not less than 2. That is, each sound-emitting unit 100 may contain multiple speakers 120. When a sound-emitting unit 100 contains multiple speakers 120, the multiple speakers 120 may share the same acoustic cavity 111, or each may have an independent acoustic cavity 111. The independent cavity structure can avoid mutual interference of sound waves between different speakers 120, which is beneficial to improving the purity of sound quality. The multiple speakers 120 can be arranged in a straight line or in an array within the cavity, and thus flexibly arranged according to the shape of the internal space of the display device 1000.

[0148] Furthermore, among the M first loudspeakers 121, the diaphragms 1204a of a portion of the first loudspeakers 121 face a third direction, while the diaphragms 1204a of another portion of the first loudspeakers 121 face a fourth direction, with the third direction being opposite to the fourth direction. That is, inside the first sound-emitting unit 101, the diaphragms 1204a of a portion of the loudspeakers 120 face one direction, while the diaphragms 1204a of another portion of the loudspeakers 120 face the opposite direction.

[0149] Similarly, among the K second loudspeakers 122, the diaphragm 1204a of a portion of the second loudspeakers 122 faces the fifth direction, while the diaphragm 1204a of another portion of the second loudspeakers 122 faces the sixth direction, with the fifth direction being opposite to the sixth direction.

[0150] This design, which places speakers 120 facing opposite directions inside a single sound-generating unit 100, can also achieve the effect of mutual vibration cancellation, reducing the vibration of the sound-generating unit 100 itself. When one part of the speaker 120 diaphragm 1204a vibrates along a third direction, the reaction force it generates on the housing 110 is opposite in direction to the reaction force generated on the housing 110 when the other part of the speaker 120 diaphragm 1204a vibrates along a fourth direction. When the two are superimposed on the housing 110, they cancel each other out, thereby effectively reducing the structural vibration of a single sound-generating unit 100 itself.

[0151] In a specific implementation, M is 2m, where m is an integer greater than or equal to 1. Specifically, the diaphragms 1204a of the m first loudspeakers 121 face a third direction, and the diaphragms 1204a of the m first loudspeakers 121 face a fourth direction. K is 2k, where k is an integer greater than or equal to 1. Specifically, the diaphragms 1204a of the k second loudspeakers 122 face a fifth direction, and the diaphragms 1204a of the k second loudspeakers 122 face a sixth direction. That is, within each sound-generating unit 100, the number of loudspeakers 120 facing two opposite directions is equal, each being half the total number of loudspeakers 120 in that sound-generating unit 100, thereby ensuring that the reaction forces in the two directions are matched in amplitude, achieving a more thorough cancellation. Furthermore, m is 1, and k is 1, meaning that each sound-generating unit 100 includes two loudspeakers 120, one facing one direction and the other facing the opposite direction. The two loudspeakers 120 can be arranged back to back inside the cavity along the axis of the sound-generating unit 100, which results in a compact structure and the most direct vibration cancellation effect.

[0152] In some specific implementations of this application, the number of speakers 120 is one.

[0153] In some other specific implementations of this application, the number of loudspeakers 120 is 2N, where N is a positive integer. The diaphragms 1204a of N loudspeakers 120 face a first direction, and the diaphragms 1204a of N loudspeakers 120 face a second direction, with the first direction being opposite to the second direction. That is, in the display device 1000, half of the loudspeakers 120 face one direction, and the other half face the opposite direction, thereby achieving mutual cancellation of overall vibrations. When the number of loudspeakers 120 is two, the vibration directions of the two loudspeakers 120 are opposite; when the number of loudspeakers 120 is four, the vibration axes of the four loudspeakers 120 are parallel and perpendicular to the extension direction of the first cavity 210, and the vibration directions of adjacent loudspeakers 120 are opposite.

[0154] This application achieves comprehensive optimization from cavity expansion and multi-band resonance enhancement to multi-level vibration suppression by forming various additional structures 200 and arranging them in a flexible manner, combined with the orientation configuration between multiple sound-emitting units 100 and the orientation arrangement of multiple speakers 120 inside each sound-emitting unit 100. This improves acoustic performance within the limited space of the display device 1000, while also taking into account the structural stability and thin design of the whole device.

[0155] In some embodiments of this application, the rear housing of the display device 1000 is provided with a mounting hole extending through the thickness direction, which exposes at least a portion of the sound-emitting unit 100, such as the magnetic circuit system 1202 of the speaker 120, to the outside of the display device 1000 for heat dissipation. The shape and size of the mounting hole match the corresponding portion of the sound-emitting unit 100 to ensure an appropriate gap between the exposed portion of the sound-emitting unit 100 and the mounting hole, avoiding structural interference.

[0156] For further information, please refer to [link / reference]. Figure 3 and Figure 4 The display device 1000 may further include a cover plate 600, which is disposed on the portion of the sound-emitting unit 100 exposed in the mounting hole. The appearance of the cover plate 600 matches the appearance of the rear shell. That is, the cover plate 600 covers the exposed portion of the sound-emitting unit 100, so that when viewed from the outside of the display device 1000, the cover plate 600 and the rear shell are visually consistent and do not affect the overall aesthetics of the display device 1000. The cover plate 600 may be made of the same material as the rear shell, such as plastic, and use the same surface treatment process, such as spraying or texturing, to achieve consistency and a sense of unity in appearance.

[0157] The cover plate 600 can be fixed to the rear shell or the sound unit 100 by means of snap-fit ​​connection, screw connection or adhesive. The specific fixing method can be selected according to the maintainability requirements. For example, snap-fit ​​connection is convenient for users to clean themselves, while adhesive method is more secure and there are no visible fasteners.

[0158] This application also provides a television set, which includes the display device 1000 described in any of the above embodiments. Since this television set uses the aforementioned display device 1000, it has the same advantages as the display device 1000, namely: effectively improving bass performance without significantly increasing cost and space, while optimizing the overall layout and heat dissipation performance. The specific structure and working principle of this television set can be found in the descriptions of the various embodiments of the display device 1000, and will not be repeated here.

[0159] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0160] The sound-generating device, display device, and television set provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A sound-generating device, characterized in that, include: A sound-generating unit, comprising a housing and at least one speaker, the housing having a sound cavity, the speaker being disposed within the sound cavity, and the sound cavity having a sound outlet; At least one additional structure is connected to the housing, the additional structure having a first cavity that communicates with the acoustic cavity.

2. The sound-generating device according to claim 1, characterized in that, The housing includes a housing body and a first connecting portion, the first connecting portion forming the sound outlet, the housing body communicating with the first connecting portion, one end of the first connecting portion communicating with the housing body and the other end communicating with the first cavity, the cross-sectional area of ​​the connection between the first connecting portion and the first cavity being less than or equal to the cross-sectional area of ​​the housing and less than or equal to the cross-sectional area of ​​the first cavity.

3. The sound-generating device according to claim 1, characterized in that, The additional structure includes an additional main body and a second connecting part. The additional main body is connected to the second connecting part. One end of the second connecting part is connected to the shell, and the other end is connected to the additional main body. The cross-sectional area of ​​the connection between the second connecting part and the shell is less than or equal to the cross-sectional area of ​​the additional main body and less than or equal to the cross-sectional area of ​​the shell.

4. The sound-generating device according to claim 1, characterized in that, It also includes a third connecting part, which is connected to the housing and the additional structure respectively. The cross-sectional area of ​​the third connecting part at the connection with the housing is less than or equal to the cross-sectional area of ​​the housing and less than or equal to the cross-sectional area of ​​the additional structure.

5. The sound-generating device according to claim 4, characterized in that, The cross-sectional area of ​​the third connection gradually changes along the direction of sound wave propagation.

6. The sound-generating device according to claim 5, characterized in that, The cross-sectional area of ​​the third connection gradually increases along the direction of sound wave propagation.

7. The sound-generating device according to claim 1, characterized in that, The loudspeaker includes a diaphragm having a vibration axis, and the first cavity has an extension direction, wherein the vibration axis is not parallel to the extension direction.

8. The sound-generating device according to claim 7, characterized in that, The extension path of the first cavity is straight, S-shaped, L-shaped, or bent.

9. The sound-generating device according to claim 1, characterized in that, The sound-generating device further includes a sound-absorbing material, which is disposed in the sound cavity or the first cavity.

10. The sound-generating device according to claim 9, characterized in that, The sound-absorbing material includes at least one of sponge, sound-absorbing cotton, foam plastic, particulate matter, and fiber material.

11. The sound-generating device according to claim 1, characterized in that, The number of additional structures is multiple, and the first cavity of each of the multiple additional structures is connected to the sound cavity.

12. The sound-generating device according to claim 11, characterized in that, The number of additional structures is two, and the first cavity of the two additional structures has a different volume.

13. The sound-generating device according to claim 12, characterized in that, The two additional structures have the same cross-sectional area, but the lengths of the first cavity are different.

14. The sound-generating device according to claim 1, characterized in that, The acoustic cavity is divided into a second cavity and a third cavity based on the diaphragm of the loudspeaker. The magnetic circuit assembly of the loudspeaker is located in the third cavity, and the first cavity of the additional structure is connected to the second cavity.

15. The sound-generating device according to claim 1, characterized in that, The number of speakers is 1.

16. The sound-generating device according to claim 1, characterized in that, The number of loudspeakers is 2N, where N is a positive integer. The vibration direction of N loudspeakers is towards a first direction, and the vibration direction of the other N loudspeakers is towards a second direction, where the first direction is opposite to the second direction.

17. The sound-generating device according to claim 16, characterized in that, The number of loudspeakers is two, and the two loudspeakers vibrate in opposite directions.

18. The sound-generating device according to claim 16, characterized in that, The number of loudspeakers is four, and the vibration axes of the four loudspeakers are parallel and perpendicular to the extension direction of the first cavity. The vibration directions of adjacent loudspeakers are opposite.

19. The sound-generating device according to claim 1, characterized in that, The shell is provided with a plurality of first ribs, which are arranged in an alternating manner.

20. The sound-generating device according to claim 19, characterized in that, The first reinforcing bar includes a first reinforcing segment and a second reinforcing segment, which are arranged alternately.

21. The sound-generating device according to claim 20, characterized in that, The height by which the first rib protrudes from the shell is less than the height by which the second rib protrudes from the shell.

22. The sound-generating device according to claim 1, characterized in that, The additional structure is arranged around the periphery of the sound-generating unit.

23. The sound-generating device according to claim 1, characterized in that, The sound-generating device further includes a first plate disposed on the housing, at least a portion of which is disposed opposite to the speaker.

24. The sound-generating device according to claim 23, characterized in that, The first plate is disposed on the outer surface of the housing.

25. The sound-generating device according to claim 23, characterized in that, The housing is provided with a recessed platform, and at least a portion of the first plate is embedded in the recessed platform.

26. A display device, characterized in that, include: Back panel; A sound-generating device, wherein the sound-generating device is the sound-generating device according to any one of claims 1 to 25, and the sound-generating device is disposed on the back plate.

27. The display device according to claim 26, characterized in that, The back plate and the housing together form the sound cavity.

28. The display device according to claim 26, characterized in that, The display device also includes a shock-absorbing motor, which is disposed on the back panel and is located on the same side of the back panel as the sound-generating device.

29. The display device according to claim 26, characterized in that, The display device also includes a rear cover, which is disposed opposite to the back panel, and the sound-emitting device is located between the back panel and the rear cover.

30. The display device according to claim 29, characterized in that, The rear housing has a through mounting hole extending along the thickness direction to expose at least a portion of the structure of the sound-generating device.

31. The display device according to claim 30, characterized in that, The display device also includes a cover plate disposed on the portion of the sound-emitting device exposed in the mounting hole, the cover plate having an appearance that matches the appearance of the rear cover.

32. The display device according to claim 29, characterized in that, The rear shell has a recessed structure, and the first cavity is formed by the closed recessed structure.

33. The display device according to claim 26, characterized in that, The back plate is provided with a second rib, which forms a groove on the back plate.

34. The display device according to claim 33, characterized in that, The display device further includes a closure member connected to the back plate, the closure member closing the groove, and the closed groove forming the first cavity.

35. The display device according to claim 34, characterized in that, The closure includes a first connecting structure and a second connecting structure, wherein the first connecting structure is disposed within the groove and the second connecting structure is disposed at the opening of the groove.

36. The display device according to claim 34, characterized in that, The inner wall of the groove is provided with a step, and the closure is connected to the step.

37. The display device according to claim 26, characterized in that, The back plate includes a first plate and a second plate, and the first plate and / or the second plate are provided with grooves. When the first plate and the second plate are attached, the closed grooves form the first cavity.

38. The display device according to claim 26, characterized in that, The back plate is provided with a groove, and at least a portion of the additional structure is disposed within the groove.

39. A television set, characterized in that, Includes the display device according to any one of claims 24 to 38.

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