Acoustic structure and mobile intelligent screen

Abstract

The application relates to the technical field of acoustic devices, and specifically provides an acoustic structure and a mobile intelligent screen. The acoustic structure comprises a shell, a top wall, and oppositely and spacedly arranged first and second side walls, the top wall being connected between the first and second side walls; a first loudspeaker unit, sound waves emitted by the first loudspeaker unit being configured to radiate outward through the first side wall; a second loudspeaker unit, sound waves emitted by the second loudspeaker unit being configured to radiate outward through the second side wall; and a third loudspeaker unit, sound waves emitted by the third loudspeaker unit being configured to radiate outward through the top wall; the first, second and third loudspeaker units are configured to direct the sound waves emitted by the first, second and third loudspeaker units to different spatial regions respectively, and collectively form multidirectional sound wave radiation, thereby not only solving the technical problems of sound wave shielding and single sound field dimension, but also creating a three-dimensional immersive experience with clear sound images and strong wrapping for users under the premise of maintaining a light and thin device form and with a high-reliability structure.

Description

Technical Field

[0001] This application relates to the field of acoustic equipment technology, and more particularly to an acoustic structure and a mobile smart screen. Background Technology

[0002] With the rapid development of smart homes and new display technologies, portable smart display devices (such as smart home screens and personal computers) are gradually becoming crucial hubs for home entertainment, online education, fitness training, and video interaction due to their advantages such as large-screen high-definition display, free movement, and applicability to multiple scenarios. In these high-frequency interaction scenarios, the upgrade of user experience depends not only on improved picture quality but also on high-quality audio output. Therefore, how to build an acoustic system with immersive sound and a wide sound field within the physical constraints of a compact overall structure and extremely narrow screen bezels has become a key research and development direction that urgently needs to be addressed in the industry.

[0003] In existing smart display devices, due to the design requirements of thinner and lighter bodies and full-screen displays, acoustic systems typically adopt a rear-facing or externally mounted layout. Specifically, most products choose to attach the speaker units to the back of the screen, causing sound waves to radiate primarily towards the back of the device. Meanwhile, to compensate for insufficient sound field width, some high-end devices employ an external, rotatable speaker solution. This involves adding motors and complex mechanical transmission structures to drive speakers on the sides or bottom of the screen to physically rotate, attempting to expand the sound coverage and improve the listening experience by mechanically changing the orientation of the speakers.

[0004] However, the aforementioned existing technologies have significant drawbacks in practical applications. First, when using a traditional rear-facing sound layout, the main sound energy is severely blocked by the large screen casing due to the strong directivity of high-frequency sound waves. This results in a significant loss of direct sound, and the sound must be reflected off the wall to reach the user in front, causing weak sound intensity, muffled vocals, and unclear sound image positioning. Second, the mechanical rotating speaker solution not only significantly increases the structural complexity and manufacturing cost of the device, but also makes the moving mechanical parts prone to wear and failure, severely compressing the internal space of the ultra-thin body. More critically, whether it is rear-facing sound reflection or mechanical horizontal rotation sound generation, the existing acoustic layout is limited to two-dimensional sound wave radiation in a horizontal plane, completely lacking vertical dimension (Z-axis) sound field support. It is impossible to truly reproduce modern panoramic sound effects with height information (such as Dolby Atmos), which greatly reduces the three-dimensional immersion and presence of the device in core scenarios such as watching movies.

[0005] Therefore, existing technologies have defects and shortcomings, and need further improvement and optimization. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this application is to provide an acoustic structure and a mobile smart screen to solve the technical problems of the existing mobile smart screen's acoustic structure having a single sound emission dimension and being easily blocked, resulting in blurred sound image positioning and the inability to construct a three-dimensional immersive panoramic sound field.

[0007] The technical solution adopted by this application to solve the technical problem is as follows: an acoustic structure, comprising: A housing, the housing including a top wall, and a first side wall and a second side wall disposed opposite to and spaced apart, the top wall being connected between the first side wall and the second side wall; A first loudspeaker unit, wherein the sound waves emitted by the first loudspeaker unit are configured to radiate outward via the first sidewall; The second speaker unit, wherein the sound waves emitted by the second speaker unit are configured to radiate outward via the second sidewall; A third loudspeaker unit, wherein the sound waves emitted by the third loudspeaker unit are configured to radiate outward via the top wall; The first speaker unit, the second speaker unit, and the third speaker unit are configured such that the sound waves they emit are directed to different spatial regions, thus forming multidirectional sound wave radiation.

[0008] Optionally, the plane containing the sound-emitting surface of the first speaker unit intersects with the first side wall and the top wall, respectively; The plane containing the sound-emitting surface of the second speaker unit intersects the second side wall and the top wall, respectively; The sound-emitting surface of the third speaker unit faces the top wall, and the plane containing the sound-emitting surface of the third speaker unit intersects the first side wall and the second side wall, respectively.

[0009] Optionally, the first sidewall is provided with a first group of sound outlet holes, the second sidewall is provided with a second group of sound outlet holes, and the top wall is provided with a third group of sound outlet holes; The housing is provided with a first lateral acoustic cavity, a second lateral acoustic cavity and a top acoustic cavity; The first speaker unit is disposed in the first lateral acoustic cavity, and the first lateral acoustic cavity is connected to the first sound outlet group; The second speaker unit is disposed in the second lateral acoustic cavity, and the second lateral acoustic cavity is connected to the second sound outlet group; The third speaker unit is disposed in the top acoustic cavity, and the top acoustic cavity is connected to the third sound outlet group.

[0010] Optionally, the sound waves emitted by the first speaker unit change their propagation direction within the first lateral acoustic cavity, and after radiating out of the housing through the first sound outlet group, propagate horizontally toward or deviate toward the front side of the housing. The sound waves emitted by the second speaker unit change their propagation direction within the second lateral acoustic cavity, and after radiating out of the housing through the second sound outlet group, they propagate horizontally toward or deviate toward the front side of the housing. The sound waves emitted by the third speaker unit change their propagation direction within the top acoustic cavity, and after radiating out of the housing through the third sound outlet group, they propagate vertically upwards, or obliquely upwards towards or deviate from the front side of the housing.

[0011] Optionally, a fourth acoustic cavity is further provided inside the housing. The housing has a face frame, and the fourth acoustic cavity is located in the area adjacent to the face frame, and is disposed on the upper part of the first side wall, the upper part of the second side wall, or the front edge of the top wall. The housing is provided with a fourth set of sound outlet holes, which are connected to the fourth acoustic cavity. The acoustic structure also includes a fourth speaker unit, which is disposed within the fourth acoustic cavity; The sound waves emitted by the fourth speaker unit are configured to radiate outward through the fourth sound outlet group, and the opening of the fourth sound outlet group faces or is biased toward the front side of the housing.

[0012] Optionally, the third speaker unit includes a first speaker subunit and a second speaker subunit disposed in the top acoustic cavity, the first speaker subunit and the second speaker subunit being arranged at intervals along the front-back direction of the top wall; The third sound outlet includes a front sound outlet group located on the top wall near the face frame shell, and a rear sound outlet group located on the top wall away from the face frame. Both the front and rear sound outlet groups are connected to the top acoustic cavity.

[0013] Optionally, the acoustic structure further includes an audio processing circuit and an audio power amplifier circuit; The first speaker unit, the second speaker unit, the third speaker unit, and the fourth speaker unit are each electrically connected to the audio power amplifier circuit; The audio processing circuit is connected to the audio power amplifier circuit and is used to process the input audio signal and output it to the independent amplification channel of the corresponding speaker unit.

[0014] Optionally, the audio processing circuit is configured to perform frequency division processing on the input audio signal, and both the first speaker unit and the second speaker unit are configured to output mid-low frequency audio signals or full-frequency audio signals; The third speaker unit is configured to output full-band audio signals or mid-to-high frequency audio signals; The fourth speaker unit is configured to output high-frequency audio signals.

[0015] Optionally, the audio processing circuit is further configured to decode multi-channel audio signals and allocate independent channels; The first speaker unit outputs the left channel audio signal, and the second speaker unit outputs the right channel audio signal. The first speaker unit and the second speaker unit work together to construct a horizontal sound field. The third speaker unit outputs a sky channel audio signal containing altitude information to construct a vertical sound field.

[0016] Another technical solution adopted by this application to solve the technical problem is as follows: a mobile smart screen, wherein the mobile smart screen includes the acoustic structure as described above, the mobile smart screen also includes a screen, a column and a base; the screen is connected to the column through the housing, the column is connected to the base, and the base is provided with movable rollers.

[0017] Beneficial effects: Compared with existing technologies, this application provides an acoustic structure and a mobile smart screen. The acoustic structure effectively overcomes the shortcomings of traditional back-facing sound emission, such as obstruction by a large screen and lack of direct sound, by radiating the first and second speaker units outwards through the first and second sidewalls on both sides of the housing. This allows the main sound to reach the user directly, significantly improving sound clarity and the accuracy of horizontal sound image localization. Simultaneously, by adding a third speaker unit radiating upwards through the top wall, the limitations of the traditional two-dimensional sound field are broken. An independent Z-axis sky channel is constructed using upward-radiating sound waves, perfectly reproducing panoramic sound effects with altitude information. Furthermore, the multi-directional radiation formed by multiple speaker units pointing to different spatial areas, with a minimalist and highly integrated static layout, replaces the complex and easily damaged mechanical rotating speaker components of existing technologies. In summary, this invention not only solves the technical problems of sound wave obstruction and a single sound field dimension, but also creates a clear and highly immersive three-dimensional sound image experience for users with a highly reliable structure while maintaining the device's slim and lightweight form. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the acoustic structure provided in this application; Figure 2This is a rear view diagram of the mobile smart screen provided in this application; Figure 3 This is a three-dimensional structural diagram of the acoustic structure provided in this application from another perspective; Figure 4 This is a three-dimensional exploded view of the acoustic structure provided in this application; Figure 5 This is a three-dimensional exploded view of the acoustic structure provided in this application from another perspective; Figure 6 This is a rear view schematic diagram of the acoustic structure provided in this application; Figure 7 This application provides Figure 6 A cross-sectional view along the I-I direction; Figure 8 This application provides Figure 7 Enlarged view of a portion of point A in the middle; Figure 9 This application provides Figure 6 A cross-sectional view along the II-II direction; Figure 10 This application provides Figure 9 Enlarged view of a portion of point B in the middle; Figure 11 This application provides Figure 9 Enlarged view of a portion of point C in the middle; Figure 12 This is a front view schematic diagram of the mobile smart screen provided in this application.

[0019] Explanation of reference numerals in the attached figures: 1. Mobile smart screen; 10. Acoustic structure; 20. Screen; 30. Column; 40. Base; 11. Housing; 12. First speaker unit; 13. Second speaker unit; 14. Third speaker unit; 15. First lateral acoustic cavity; 16. Second lateral acoustic cavity; 17. Top acoustic cavity; 111. Top wall; 112. First side wall; 113. Second side wall; 114. First sound outlet group; 115. Second sound outlet group; 116. Third sound outlet group. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the above terms according to the specific circumstances.

[0023] Please refer to the following: Figures 1 to 5 In the first embodiment of this application, an acoustic structure 10 for a mobile smart screen 1 is provided. Mobile smart screens 1 (such as smart home screens, personal computers, etc.) are gradually becoming important core hubs for home entertainment, online education, fitness training, and video interaction due to their advantages such as large-screen high-definition display, free movement, and applicability to multiple scenarios. The acoustic structure 10 provided in the first embodiment of this application is applied to the mobile smart screen 1, solving the technical problem in the prior art where the acoustic structure 10 of the mobile smart screen 1 has a single sound emission dimension and is easily obstructed, resulting in blurred sound image positioning and the inability to construct a three-dimensional immersive panoramic sound field.

[0024] The acoustic structure 10 includes a housing 11, a first speaker unit 12, a second speaker unit 13, and a third speaker unit 14. The housing 11 includes a top wall 111, a first side wall 112, and a second side wall 113. The first side wall 112 and the second side wall 113 are arranged opposite to each other and spaced apart. The top wall 111 is connected between the first side wall 112 and the second side wall 113. The sound waves emitted by the first speaker unit 12 are configured to radiate outward through the first side wall 112. The sound waves emitted by the second speaker unit 13 are configured to radiate outward through the second side wall 113. The sound waves emitted by the third speaker unit 14 are configured to radiate outward through the top wall 111. The first speaker unit 12, the second speaker unit 13, and the third speaker unit 14 are configured such that the emitted sound waves are directed to different spatial regions, forming multi-directional sound wave radiation.

[0025] The acoustic structure 10 radiates the first speaker unit 12 and the second speaker unit 13 outwards via the first sidewall 112 and the second sidewall 113 on both sides of the housing 11, effectively overcoming the defects of traditional back-facing sound emission being blocked by the large screen 20 and lacking direct sound. This allows the main sound to be delivered directly to the user, significantly improving the clarity of the sound and the accuracy of horizontal sound image positioning. Simultaneously, by adding a third speaker unit 14 radiating upwards via the top wall 111, the limitations of the traditional two-dimensional sound field are broken. An independent Z-axis sky channel is constructed using upward-radiating sound waves, perfectly reproducing panoramic sound effects with altitude information. Furthermore, the multi-directional radiation formed by multiple speaker units pointing to different spatial areas, with a minimalist and highly integrated static layout, replaces the complex and easily damaged mechanical rotating speaker components of existing technologies. In summary, this invention not only solves the technical problems of sound wave obstruction and a single sound field dimension, but also creates a clear and highly immersive three-dimensional sound image experience for users with a highly reliable structure while maintaining the device's slim and lightweight form.

[0026] In some embodiments, the plane containing the sound-emitting surface of the first speaker unit 12 intersects with both the first sidewall 112 and the top wall 111; that is, the plane containing the sound-emitting surface of the first speaker unit 12 is perpendicular to or at an acute angle to the first sidewall 112, and the sound-emitting surface of the first speaker unit 12 is perpendicular to or at an acute angle to the top wall 111. By making the sound-emitting surface of the first speaker unit 12 perpendicular to or at an acute angle to the sidewall (i.e., the speaker is "lying flat" or obliquely embedded in the housing), the physical limitation of the speaker diameter on the ultra-narrow frame is avoided, allowing a large-size, long-stroke high-performance sound-emitting unit to still be accommodated within the ultra-thin housing 11. At the same time, the specific intersection angle provides a guiding buffer space for sound waves entering the lateral cavity, laying a structural foundation for the smooth directional radiation of sound waves.

[0027] The plane containing the sound-emitting surface of the second speaker unit 13 intersects with both the second side wall 113 and the top wall 111. That is, the plane containing the sound-emitting surface of the second speaker unit 13 is perpendicular to or at an acute angle to the second side wall 113, and the sound-emitting surface of the second speaker unit 13 is perpendicular to or at an acute angle to the top wall 111. By mounting the second speaker unit 13 in a laterally offset position with perpendicular or acute-angle intersections, not only is efficient spatial stacking of the large right channel unit within the narrow side frame achieved, but the initial sound emitted by the speaker can also enter the sound-guiding cavity at a specific incident angle. The first speaker unit 12 and the second speaker unit 13 cooperate to present a symmetrical physical layout, effectively widening the horizontal physical sound field of the entire unit. This allows the sound radiating from the housing 11 to form precise left and right sound images in the front listening area, significantly improving the breadth of the stereo sound.

[0028] The sound-emitting surface of the third speaker unit 14 faces the top wall 111, and the plane containing the sound-emitting surface of the third speaker unit 14 intersects the first side wall 112 and the second side wall 113, respectively. That is, the plane containing the sound-emitting surface of the third speaker unit 14 is parallel to or at an angle to the top wall 111; the plane containing the sound-emitting surface of the third speaker unit 14 is either at an acute angle to the first side wall 112 or perpendicular to the second side wall 113. This precisely constructs an independent Z-axis (height) sound field for the panoramic sound system, fully utilizing the space below the top wall 111 by positioning the sound-emitting surface towards the top wall 111 and intersecting with the side walls. In particular, when the sound-emitting surface is at an angle (tilted upwards and forwards) to the top wall 111, it can guide high-frequency and mid-frequency sound waves along a specific parabolic reflection path, projecting them obliquely to the core listening area in front of the device. This avoids excessive sound energy dispersion caused by sound going straight up and down, and accurately compensates for the height sound details in three-dimensional space, giving users a top-down three-dimensional immersive experience.

[0029] It should be noted that the sound-emitting surface and the plane on which the sound-emitting surface is mentioned in the embodiments of this application are geometric reference planes introduced to describe the spatial installation posture of the loudspeaker unit. In practical applications, the diaphragm of the loudspeaker unit is usually a non-absolute planar structure with a certain curvature, such as a cone or dome; therefore, the "plane on which the sound-emitting surface is located" mentioned in this application specifically refers to: the macroscopic reference plane formed by the outer edge (or suspension edge) of the diaphragm of the loudspeaker unit, or the plane on which the end face perpendicular to the main radiation axis of the sound wave of the loudspeaker unit is located.

[0030] Please refer to further details. Figures 6 to 11In other embodiments, the first sidewall 112 has a first sound outlet group 114, the second sidewall 113 has a second sound outlet group 115, and the top wall 111 has a third sound outlet group 116; the housing 11 is provided with a first lateral acoustic cavity 15, a second lateral acoustic cavity 16, and a top acoustic cavity 17; the first speaker unit 12 is disposed in the first lateral acoustic cavity 15, and the first lateral acoustic cavity 15 communicates with the first sound outlet group 114; the second speaker unit 13 is disposed in the second lateral acoustic cavity 16, and the second lateral acoustic cavity 16 communicates with the second sound outlet group 115; the third speaker unit 14 is disposed in the top acoustic cavity 17, and the top acoustic cavity 17 communicates with the third sound outlet group 116.

[0031] By separately providing the first lateral acoustic cavity 15, the second lateral acoustic cavity 16, and the top acoustic cavity 17 within the housing 11, the first speaker unit 12, the second speaker unit 13, and the third speaker unit 14 are independently encapsulated, completely isolating the crosstalk between the sound waves emitted by each unit within the housing 11, ensuring the purity of the sound in each channel and the high separation of the sound field. Furthermore, the first lateral acoustic cavity 15 communicates with the first sound outlet group 114 formed on the first side wall 112, the second lateral acoustic cavity 16 communicates with the second sound outlet group 115 formed on the second side wall 113, and the top acoustic cavity 17 communicates with the third sound outlet group 116 formed on the top wall 111. This not only avoids disordered reflection and energy loss of sound waves within the cavities of the housing 11 but also precisely focuses sound energy, radiating it directionally to the sides and top. Finally, the independent first lateral acoustic cavity 15, second lateral acoustic cavity 16 and top acoustic cavity 17 provide the necessary acoustic resonance volume for their respective speaker units, significantly improving the low-frequency extension and fullness of the sound.

[0032] In some embodiments, the sound waves emitted by the first speaker unit 12 change their propagation direction within the first lateral acoustic cavity 15, and after radiating out of the housing 11 through the first sound outlet group 114, they propagate horizontally toward or deviate toward the front of the housing 11; that is, the sound emitted by the first speaker unit 12, through the combined action of the first lateral acoustic cavity 15 and the first sound outlet group 114, propagates toward the front of the housing 11, i.e. toward the user.

[0033] The sound waves emitted by the second speaker unit 13 change their propagation direction within the second lateral acoustic cavity 16, and after radiating out of the housing 11 through the second sound outlet group 115, they propagate horizontally toward or deviate from the front of the housing 11. In other words, the sound emitted by the second speaker unit 13, through the combined action of the second lateral acoustic cavity 16 and the second sound outlet group 115, propagates toward the front of the housing 11, i.e. toward the user, and cooperates with the first speaker unit 12 to form horizontally propagating left and right channels.

[0034] The sound waves emitted by the third speaker unit 14 change their propagation direction within the top acoustic cavity 17 and radiate out of the housing 11 through the third sound outlet group 116. They then propagate vertically upwards or obliquely upwards towards or biased towards the front of the housing 11. In other words, the sound emitted by the third speaker unit 14, through the combined action of the top acoustic cavity 17 and the third sound outlet group 116, propagates towards the front of the housing 11, i.e., towards directly upwards or towards the user, accurately compensating for the height sound details in three-dimensional space and giving the user a top-down three-dimensional immersive experience.

[0035] In some specific embodiments, a fourth acoustic cavity is also provided inside the housing 11. Considering that high-frequency sound waves have extremely strong physical directivity and are easily attenuated by physical obstruction, the housing 11 in this embodiment has a face frame, and the area of ​​the fourth acoustic cavity adjacent to the face frame is arranged to minimize the radiation path of the sound and ensure that the high-frequency direct sound can be transmitted to the user directly without obstruction. Furthermore, the fourth acoustic cavity is specifically set on the upper part of the first side wall 112, the upper part of the second side wall 113, or the front edge of the top wall 111. On the one hand, it cleverly utilizes the structural redundancy space of the edge of the display screen 20 or the upper corner of the housing 11, and achieves efficient reuse of internal space under the physical constraint of the extremely narrow bezel, avoiding spatial interference with the main acoustic cavity below. On the other hand, this high-position front-edge arrangement can raise the sound source to a height closer to the user's ear level, thereby significantly enhancing the clarity of human voice dialogue and the penetration of the sound, creating a more accurate imaging and more transparent front-field listening experience for the user.

[0036] Furthermore, the housing 11 is provided with a fourth sound outlet group, which is connected to the fourth acoustic cavity; the acoustic structure 10 also includes a fourth speaker unit, which is disposed in the fourth acoustic cavity; the sound waves emitted by the fourth speaker unit are configured to radiate outward through the fourth sound outlet group, and the opening of the fourth sound outlet group faces or is biased towards the front side of the housing 11. By placing the fourth speaker unit within the fourth acoustic cavity, an absolutely independent internal working environment is provided for the sound-emitting unit, effectively isolating it from sound wave interference and cavity crosstalk with other speaker units. Simultaneously, the specific opening orientation design fully accommodates the strong physical directivity of high-frequency sound waves, allowing the sound emitted by the fourth speaker unit to be projected directly to the user's core listening area in front of the device via the shortest straight path, without any obstruction from the casing 11. This extremely pure forward-facing direct sound output not only significantly reduces the attenuation and loss of sound energy caused by environmental reflection, greatly improving the sound's penetration, brightness, and dialogue clarity, but also forms a perfect spatial complement with the multi-dimensional sound waves radiated from the sides and top, precisely locking in the details and imaging sharpness of the frontal sound image for the entire multi-directional radiating sound field.

[0037] In some specific implementations, to further enhance the spatial immersion and sound field depth of the top overhead sound channel, the third speaker unit 14 also includes a first speaker subunit and a second speaker subunit. These two subunits are arranged at intervals along the front-to-back direction of the top wall 111. That is, when the user is normally using the mobile smart screen 1, one subunit is relatively close to the user, and the other is relatively far away. This front-to-back array spatial layout breaks the limitations of single-point sound emission, expanding the originally single overhead sound channel into a distributed array of sound sources with depth.

[0038] The third sound outlet includes a front sound outlet group located on the top wall 111 near the face frame shell, and a rear sound outlet group located on the top wall 111 away from the face frame. In conjunction with the third sound outlet including the front sound outlet group located on the top wall 111 near the face frame shell, and the rear sound outlet group located on the top wall 111 away from the face frame, in this embodiment, the first speaker subunit is disposed in the top acoustic cavity 17, corresponding to and communicating with the front sound outlet group, and the second speaker subunit is disposed in the top acoustic cavity 17, corresponding to and communicating with the rear sound outlet group.

[0039] By separating the two speakers into front and rear physical hardware units and using independent sound guides, not only is crosstalk and sound energy cancellation between the two speaker sub-units effectively avoided, but a dynamic depth sound field with a front-to-back distance difference is also created above the top of the device. When playing audio with panoramic sound information, the sound waves radiated from the top can form a clear front-to-back sound image relay and a realistic sound source movement trajectory (for example, perfectly simulating the spatial sense of sound sweeping from the top of the head from front to back), thereby greatly enhancing the three-dimensional immersion and presence in the vertical direction.

[0040] In some embodiments, the acoustic structure 10 further includes an audio processing circuit and an audio power amplifier circuit; the first speaker unit 12, the second speaker unit 13, the third speaker unit 14, and the fourth speaker unit are respectively electrically connected to the audio power amplifier circuit; the audio processing circuit is connected to the audio power amplifier circuit and is used to process the input audio signal and output it to the independent amplification channel of the corresponding speaker unit.

[0041] The acoustic structure 10 significantly enhances the overall audio performance of the system by adding audio processing and audio power amplifier circuits and configuring independent amplification channels for the four speaker units. Firstly, the independent amplification channels achieve precise driving and effective anti-crosstalk, avoiding mutual crosstalk and power interference between multiple audio signals during amplification, reducing intermodulation distortion, and ensuring the purity and high fidelity of the sound output from each speaker. Secondly, the audio processing circuit further optimizes the construction of the stereo sound field, enabling fine-grained allocation of input signals and independent gain, crossover, or phase differentiation processing for different speakers, thereby creating a more layered and directional stereo sound field and greatly enhancing the user's immersive listening experience. Furthermore, each speaker unit is driven by an independent channel, which not only improves the driving efficiency of the multi-unit acoustic architecture but also enhances the system reliability and stability under high power output conditions.

[0042] Furthermore, the audio processing circuit is configured to perform frequency division processing on the input audio signal, and the first speaker unit 12 and the second speaker unit 13 are both configured to output low-frequency audio signals or full-frequency audio signals; the third speaker unit 14 is configured to output full-frequency audio signals or mid-high frequency audio signals; and the fourth speaker unit is configured to output high-frequency audio signals.

[0043] Through frequency division processing of the audio processing circuit, directional distribution of audio signals is achieved. The first speaker unit 12 and the second speaker unit 13 output mid-low frequency or full-frequency audio signals, ensuring a rich and full horizontal main sound field; the third speaker unit 14 outputs full-frequency or mid-high frequency audio signals, accurately depicting the height details of the sky channel; the fourth speaker unit outputs high-frequency audio signals, greatly improving the penetration of the direct sound from the front field. This mechanism effectively avoids frequency aliasing and sound wave interference, constructing a high-fidelity three-dimensional sound field with distinct layers.

[0044] In other embodiments, the audio processing circuit is further configured to decode and allocate independent channels for multi-channel audio signals; the first speaker unit 12 outputs a left channel audio signal, the second speaker unit 13 outputs a right channel audio signal, and the first speaker unit 12 and the second speaker unit 13 cooperate to construct a horizontal sound field; the third speaker unit 14 outputs a sky channel audio signal containing altitude information to construct a vertical sound field.

[0045] The audio processing circuit decodes and allocates independent channels for the multi-channel audio signals, achieving precise mapping between multi-dimensional sound tracks and physical speakers. The first speaker unit 12 outputs the left channel audio signal, which, together with the right channel audio signal output by the second speaker unit 13, collaboratively constructs a wide and clear horizontal sound field. The third speaker unit 14 outputs a sky channel audio signal containing altitude information to construct a vertical sound field. This seamless integration of horizontal and vertical sound fields realistically reproduces panoramic sound effects, creating a highly immersive three-dimensional experience for the user.

[0046] Furthermore, the first sound outlet group 114, the second sound outlet group 115, and the third sound outlet group 116 are all arranged in a long strip array, a circular array, or other specific patterns, and are covered with dustproof mesh on the inside, which can improve both the aesthetics and sound effect, and prevent dust from damaging the speaker units. There are no restrictions on the number of dustproof meshes, sound holes, and acoustic cavities corresponding to each speaker unit.

[0047] Please refer to the following: Figure 2 and Figure 12The second embodiment of this application also provides a mobile smart screen 1, which includes the acoustic structure 10 provided in the first embodiment of this application. The mobile smart screen 1 further includes a screen 20, a column 30, and a base 40. The screen 20 is connected to the column 30 through the housing 11, the column 30 is connected to the base 40, and the base 40 is provided with casters. Specifically, the mobile smart screen 1 includes, but is not limited to, smart home screens, personal phones, and other terminal devices. The mobile smart screen 1 produces a sound field with good directivity, allowing sound to reach the user directly, providing clear sound image positioning and a strong sense of immersion; it is also less susceptible to environmental obstruction and interference; it has a highly reliable structure and creates a clear and highly immersive three-dimensional sound and image experience for the user.

[0048] In summary, this application provides an acoustic structure and a mobile smart screen. The acoustic structure includes: a housing, the housing including a top wall and a first side wall and a second side wall that are opposite to and spaced apart, the top wall being connected between the first side wall and the second side wall; a first speaker unit, the sound waves emitted by the first speaker unit being configured to radiate outward via the first side wall; a second speaker unit, the sound waves emitted by the second speaker unit being configured to radiate outward via the second side wall; and a third speaker unit, the sound waves emitted by the third speaker unit being configured to radiate outward via the top wall; the first speaker unit, the second speaker unit, and the third speaker unit are configured such that the emitted sound waves are directed to different spatial regions, jointly forming multi-directional sound wave radiation. The acoustic structure effectively overcomes the shortcomings of traditional back-facing sound emission, such as obstruction by a large screen and lack of direct sound, by radiating the first and second speaker units outwards through the first and second sidewalls on both sides of the housing. This allows the main sound to reach the user directly, significantly improving sound clarity and the accuracy of horizontal sound image positioning. Simultaneously, by adding a third speaker unit radiating upwards through the top wall, the limitations of the traditional two-dimensional sound field are broken. An independent Z-axis sky channel is constructed using upward-radiating sound waves, perfectly reproducing panoramic sound effects with altitude information. Furthermore, the multi-directional radiation formed by multiple speaker units pointing to different spatial areas, with a minimalist and highly integrated static layout, replaces the complex and easily damaged mechanical rotating speaker components of existing technologies. In summary, this invention not only solves the technical problems of sound wave obstruction and a single sound field dimension, but also creates a clear and highly immersive three-dimensional sound image for users with a highly reliable structure while maintaining the device's slim and lightweight form.

[0049] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An acoustic structure, characterized in that, include: A housing, the housing including a top wall, and a first side wall and a second side wall disposed opposite to and spaced apart, the top wall being connected between the first side wall and the second side wall; A first loudspeaker unit, wherein the sound waves emitted by the first loudspeaker unit are configured to radiate outward via the first sidewall; The second speaker unit, wherein the sound waves emitted by the second speaker unit are configured to radiate outward via the second sidewall; A third loudspeaker unit, wherein the sound waves emitted by the third loudspeaker unit are configured to radiate outward via the top wall; The first speaker unit, the second speaker unit, and the third speaker unit are configured such that the sound waves they emit are directed to different spatial regions, thus forming multidirectional sound wave radiation.

2. The acoustic structure as described in claim 1, characterized in that, The plane containing the sound-emitting surface of the first speaker unit intersects with the first side wall and the top wall, respectively; The plane containing the sound-emitting surface of the second speaker unit intersects the second side wall and the top wall, respectively; The sound-emitting surface of the third speaker unit faces the top wall, and the plane containing the sound-emitting surface of the third speaker unit intersects the first side wall and the second side wall, respectively.

3. The acoustic structure as described in claim 1 or 2, characterized in that, The first sidewall has a first set of sound outlet holes, the second sidewall has a second set of sound outlet holes, and the top wall has a third set of sound outlet holes. The housing is provided with a first lateral acoustic cavity, a second lateral acoustic cavity and a top acoustic cavity; The first speaker unit is disposed in the first lateral acoustic cavity, and the first lateral acoustic cavity is connected to the first sound outlet group; The second speaker unit is disposed in the second lateral acoustic cavity, and the second lateral acoustic cavity is connected to the second sound outlet group; The third speaker unit is disposed in the top acoustic cavity, and the top acoustic cavity is connected to the third sound outlet group.

4. The acoustic structure as described in claim 3, characterized in that, The sound waves emitted by the first speaker unit change their propagation direction within the first lateral acoustic cavity, and after radiating out of the housing through the first sound outlet group, they propagate horizontally toward or deviate toward the front side of the housing. The sound waves emitted by the second speaker unit change their propagation direction within the second lateral acoustic cavity, and after radiating out of the housing through the second sound outlet group, they propagate horizontally toward or deviate toward the front side of the housing. The sound waves emitted by the third speaker unit change their propagation direction within the top acoustic cavity, and after radiating out of the housing through the third sound outlet group, they propagate vertically upwards, or obliquely upwards towards or deviate from the front side of the housing.

5. The acoustic structure as described in claim 3, characterized in that, The housing also includes a fourth acoustic cavity. The housing has a face frame. The fourth acoustic cavity is located in the area adjacent to the face frame and is disposed on the upper part of the first side wall, the upper part of the second side wall, or the front edge of the top wall. The housing is provided with a fourth set of sound outlet holes, which are connected to the fourth acoustic cavity. The acoustic structure also includes a fourth speaker unit, which is disposed within the fourth acoustic cavity; The sound waves emitted by the fourth speaker unit are configured to radiate outward through the fourth sound outlet group, and the opening of the fourth sound outlet group faces or is biased toward the front side of the housing.

6. The acoustic structure as described in claim 5, characterized in that, The third speaker unit includes a first speaker subunit and a second speaker subunit disposed in the top acoustic cavity, the first speaker subunit and the second speaker subunit being arranged at intervals along the front-back direction of the top wall; The third sound outlet includes a front sound outlet group located on the top wall near the face frame shell, and a rear sound outlet group located on the top wall away from the face frame. Both the front and rear sound outlet groups are connected to the top acoustic cavity.

7. The acoustic structure as described in claim 6, characterized in that, The acoustic structure also includes an audio processing circuit and an audio power amplifier circuit; The first speaker unit, the second speaker unit, the third speaker unit, and the fourth speaker unit are each electrically connected to the audio power amplifier circuit; The audio processing circuit is connected to the audio power amplifier circuit and is used to process the input audio signal and output it to the independent amplification channel of the corresponding speaker unit.

8. The acoustic structure as described in claim 7, characterized in that, The audio processing circuit is configured to perform frequency division processing on the input audio signal, and both the first speaker unit and the second speaker unit are configured to output low-frequency audio signals or full-frequency audio signals. The third speaker unit is configured to output full-band audio signals or mid-to-high frequency audio signals; The fourth speaker unit is configured to output high-frequency audio signals.

9. The acoustic structure as described in claim 7, characterized in that, The audio processing circuit is also configured to decode multi-channel audio signals and allocate independent channels; The first speaker unit outputs the left channel audio signal, and the second speaker unit outputs the right channel audio signal. The first speaker unit and the second speaker unit work together to construct a horizontal sound field. The third speaker unit outputs a sky channel audio signal containing altitude information to construct a vertical sound field.

10. A mobile smart screen, characterized in that, The mobile smart screen includes the acoustic structure as described in any one of claims 1-9, and the mobile smart screen further includes a screen, a column, and a base; the screen is connected to the column through the housing, the column is connected to the base, and the base is provided with movable rollers.

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