Patent Grant
11838720
This application is a U.S. National Stage of International Patent Application No. PCT/CN2020/076423 filed on Feb. 24, 2020, which claims priority to Chinese Patent Application No. 201910210343.3 filed on Mar. 19, 2019. Both of the aforementioned applications are hereby incorporated by reference in their entireties.
The present invention relates to the field of sound-making technologies, and in particular, to a vibration and sound-making apparatus and an electronic device.
With development of technologies and consumer requirements, an external size of an electronic device such as a mobile terminal and a display becomes larger, and an industrial design of the electronic device becomes thinner. Especially, for an existing mobile phone, a size requirement for an internal component of the mobile phone becomes higher. However, a common sound-making apparatus in the electronic device implements a speaker function to make a sound by using a micro-magnetic speaker and a micro-vibration motor. However, this structure is complex, consumes a large amount of energy, occupies a large amount of internal space, and limits a light and thin design of a product.
This application provides an electronic device and a vibration and sound-making apparatus, so that vibration of a driving diaphragm is used to drive air in a speaker box to vibrate to implement sound making. The driving diaphragm has a simple structure and can be disposed in a large area without occupying too much space of the electronic device. This facilitates a light and thin design of the electronic device.
In an embodiment, the electronic device includes a main body, a display disposed on the main body, and a sound-making assembly. The sound-making assembly includes a speaker box and a driving diaphragm located in the speaker box, the speaker box is disposed inside the main body or is formed by using the main body and the display, the main body is provided with a speaker grille corresponding to the speaker box, the driving diaphragm is fastened inside the speaker box and divides the speaker box into two sub-chambers, the speaker grille is connected to one of the sub-chambers, the driving diaphragm vibrates after receiving an audio signal, the driving diaphragm drives, through vibration of the driving diaphragm, air in the two sub-chambers to vibrate to make a sound, and the sound is spread through the speaker grille. There may be one speaker box, or there may be two or more speaker boxes, and there may be one or a plurality of driving diaphragms in each speaker box.
In the electronic device in this embodiment, the driving diaphragm vibrates by receiving the audio signal, and vibration of the driving diaphragm drives air in the two sub-chambers to constantly fluctuate, causing air fluctuation and forming a sound wave. Compared with an existing micro-magnetic speaker and a micro-vibration motor, the driving diaphragm has a simple structure, is relatively thin, and can be paved in a large area (an area of the diaphragm may be designed based on a length and a width of the electronic device). When volume and sound quality are ensured, the driving diaphragm does not need to occupy much space of the electronic device. This facilitates a light and thin design of the electronic device. For an electronic device in the prior art in which a moving magnetic coil is connected to a screen to drive the screen to vibrate to make a sound, although a sound is made through vibration, because the moving magnetic coil needs to drive the screen to make a sound, and the sound is made through vibration of the screen, and because the screen to be driven has relatively high weight, relatively large driving force is required, and energy consumption is relatively large. In addition, the screen is fastened all around. Consequently, neither volume nor audio performance of the generated sound can reach a level of a speaker of the electronic apparatus, only an earpiece can be replaced, and the generated sound cannot be used as a speaker sound. However, in the vibration and sound-making apparatus in this application, a light and thin driving diaphragm is used to drive the air in the speaker box to vibrate to make a sound, instead of driving a component with high weight and hardness such as a screen to make a sound. The driving diaphragm drives the air to vibrate to make a sound, and no additional driving force is required, so that not only energy can be saved, but also the volume and a sound effect can be ensured. Therefore, effects of the earpiece and the speaker can be achieved.
In some embodiments, there are a plurality of driving diaphragms, the plurality of driving diaphragms are disposed in parallel at intervals in a same direction, and all the driving diaphragms vibrate by receiving different audio signals, and drive air in the sub-chamber to vibrate to make sounds in a plurality of different frequency bands. In this implementation, a plurality of driving diaphragms of a same shape are disposed in parallel at intervals in a same direction (in a width direction), to reduce an occupied area. The plurality of driving diaphragms make sounds in different frequency bands after receiving audio signals, so that sound making in a plurality of frequency bands can be implemented. Therefore, a multimodality in each frequency band is excluded, a distortion effect in each frequency band is reduced, and sound quality of the vibration and sound-making apparatus is improved.
In some embodiments, a partition wall is further disposed between every two adjacent driving diaphragms, the partition wall divides the speaker box into a plurality of independent speaker sub-boxes, and each speaker sub-box is correspondingly provided with one speaker sub-grille. The plurality of speaker sub-boxes extend in a same direction and are disposed in parallel, so that audio in different frequency bands is emitted through the independent speaker sub-boxes. Every two driving diaphragms can be separated, so that when the plurality of driving diaphragms vibrate to make sounds, the plurality of driving diaphragms do not interfere with each other, to ensure volume, and improve sound quality of a sound made by the vibration and sound-making apparatus.
Further, the electronic device may further include a processor, and the processor is electrically connected to the plurality of driving diaphragms in the speaker box, and is configured to: send an audio signal to the plurality of driving diaphragms, and control the plurality of driving diaphragms to simultaneously vibrate and respectively work in different frequency bands, so that the speaker box makes sounds in a plurality of different frequency bands, and the vibration and sound-making apparatus produces a consistent and flat frequency response in all frequency bands, so as to improve sound quality. Certainly, the processor may further control one or some driving diaphragms to vibrate. In an implementation, each driving diaphragm is equipped with one driver circuit, the processor outputs a plurality of different audio signals to a plurality of driver circuits, and each driver circuit drives a driving diaphragm connected to the driver circuit to vibrate to make a sound. According to this solution, separate control can be implemented and performance of controlling each driving diaphragm is relatively good. In another implementation, the processor sends a same signal to one driver circuit, and the driver circuit separately transmits the same signal to the plurality of driving diaphragms after frequency division. In this manner, there is a simple structure.
In some embodiments, the electronic device includes two sound-making assemblies, two speaker boxes of the two sound-making assemblies are arranged in a length direction of the electronic device, the two speaker boxes are separated by a support body, each speaker box is provided with the speaker grille, and driving diaphragms in the two speaker boxes simultaneously vibrate to make sounds, so that the electronic device implements stereo sound making. One or more driving diaphragms are separately fastened in the two speaker boxes. Specifically, the support body is made of a metal material such as aluminum, and can implement quick heat dissipation of the vibration and sound-making apparatus. In the prior art, a magnetic actuator including a moving magnetic coil is connected to a screen to drive the screen to vibrate to make a sound, and a quantity of magnetic actuators needs to be increased to drive a screen with relatively high quality. Consequently, relatively large space is still occupied, stereo sound sources are separated inevitably unclearly, and even there is no stereo effect. However, in this application, only two sound-making assemblies including a speaker box and a driving diaphragm need to separately vibrate to make sounds, so that a stereo effect can be achieved, a size is small, and a loss is small.
In some embodiments, the speaker grilles corresponding to the two speaker boxes are symmetric about the support body, to further implement balanced sound-making of the vibration and sound-making apparatus.
When a stereo sound is made through two speaker boxes, in one case, the two speaker boxes are symmetric about the support body, and the driving diaphragms in the two speaker boxes are symmetric about the support body, so that the vibration and sound-making apparatus implements balanced stereo sound making, and sound quality of the electronic device is improved. It may be understood that when the two speaker boxes are rectangular cubical space, lengths, widths, and thicknesses of the two speaker boxes are equal, and shapes and areas of the driving diaphragms in the two speaker boxes are equal, to ensure that the two speaker boxes make a balanced stereo sound. In another case, the two speaker boxes are symmetric about the support body, and areas of the driving diaphragms in the two speaker boxes are different. Alternatively, when the two speaker boxes are asymmetric, and the driving diaphragms in the two speaker boxes have a same area or different areas, the vibration and sound-making apparatus is further connected to a modulator, and the modulator adjusts an audio signal to maintain balanced sounds made through vibration of the driving diaphragms in the two speaker boxes, namely, balanced sounds made through a left audio channel and a right audio channel. The modulator adjusts, according to a digital signal processing algorithm, audio signals that are input into the driving diaphragms in the two speaker boxes, so that a sound effect is kept balanced when the driving diaphragms in the two speaker boxes vibrate, to implement a balanced stereo sound of the vibration and sound-making apparatus.
In some embodiments, the speaker box includes a box surface, a protective film is stacked on the box surface, and the speaker grille penetrates the protective film. The protective film is stacked on the box surface, to avoid a case in which other substances such as external moisture enter the speaker box through the speaker grille, and damage a display or a component in the main body.
In some embodiments, the driving diaphragm is a piezoelectric ceramic element. When receiving an audio signal, the piezoelectric ceramic element vibrates according to a frequency of the signal, and drives air on a surface of the piezoelectric ceramic element to vibrate to generate a sound wave, so as to generate sound quality with relatively good high-frequency performance.
In some other embodiments of the driving diaphragm, the driving diaphragm includes a piezoelectric ceramic element and a diaphragm, the piezoelectric ceramic element is disposed on a surface of the diaphragm or the diaphragm is disposed around a periphery of the piezoelectric ceramic element, and the piezoelectric ceramic element drives the diaphragm to vibrate. The piezoelectric ceramic element and the diaphragm drive, through vibration of the piezoelectric ceramic element and the diaphragm, air inside the two sub-chambers to vibrate to make a sound. Because the diaphragm is elastic to some extent, the diaphragm may store energy during vibration, to improve low-frequency performance of a sound made by the vibration and sound-making apparatus. The diaphragm may be made of an elastic material such as polycarbonate (PC, Polycarbonate) or polyetheretherketone (Peek, Polyetherketone).
In some embodiments, the driving diaphragm further includes an edge, the edge is disposed around a periphery of the diaphragm, and the diaphragm drives the edge to vibrate. The edge drives, through vibration of the edge, air inside the speaker box to vibrate to make a sound. Because the edge is elastic, the edge may correspondingly store energy during vibration, to increase a vibration amplitude, and improve low-frequency performance and linearity of a sound made by the vibration and sound-making apparatus.
In some embodiments, there are a plurality of piezoelectric ceramic elements, and the plurality of piezoelectric ceramic elements are disposed in a stacked manner. Compared with a single piezoelectric ceramic element, the plurality of piezoelectric ceramic elements receive audio signals and vibrate at a larger amplitude. This helps improve loudness of a sound made by the vibration and sound-making apparatus.
In the embodiments, in some embodiments of a method for fastening the driving diaphragm, an end of the driving diaphragm is fastened to a box wall of the speaker box, and the other end and the speaker box are disposed at an interval. To be specific, the driving diaphragm is in a cantilever state, and the driving diaphragm vibrates by receiving an audio signal, so that the vibration and sound-making apparatus makes a sound relatively naturally.
The driving diaphragm includes a fixed end and a free end that are disposed opposite to each other, the fixed end is fastened to the box wall, an amplitude of the free end is relatively large when the driving diaphragm vibrates, and a sound wave in the speaker box is naturally spread from the speaker grille, so that the electronic device makes a sound naturally. Further, the modulator of the electronic device may further adjust, according to the digital signal processing algorithm and a real-time control algorithm, the audio signal input into the driving diaphragm, to avoid a case in which vibration cannot be stopped in a timely manner due to signal interruption that occurs when the driving diaphragm vibrates, to avoid generation of an echo, and to ensure that the electronic device stably makes a sound. Alternatively, a damping structure is disposed on the driving diaphragm, so that vibration can be stopped in a timely manner when the driving diaphragm is in the cantilever state and a signal stops, so that the vibration and sound-making apparatus makes a sound stably.
In some embodiments, the periphery of the driving diaphragm is fastened to the box wall of the speaker box. The driving diaphragm is bent by receiving an audio signal and drives air to vibrate, to ensure that the electronic device makes a sound effectively and stably. In addition, the modulator may be disposed, and the modulator is configured to pre-control, according to the digital signal processing algorithm, the audio signal input into the driving diaphragm, to avoid a nonlinear problem and a total harmonic distortion problem that occur when the driving diaphragm makes a sound and is bent.
In some embodiments, the driving diaphragm includes a diaphragm and a piezoelectric ceramic support body, the piezoelectric ceramic support body supports the diaphragm in the speaker box, and the piezoelectric ceramic support body vibrates by receiving an audio signal, and drives the diaphragm to make a piston motion in the speaker box, so that air in the sub-chamber vibrates to make a sound.
In some embodiments, the plurality of driving diaphragms in the speaker box are fastened in a same manner, or the plurality of driving diaphragms in the speaker box are fastened in different manners. When only one fastening end of each of the driving diaphragm in the speaker box is fastened to the box wall of the speaker box, fastening ends of the plurality of driving diaphragms are fastened to a same box wall of the speaker box, to facilitate assembly.
In some embodiments, the electronic device includes a waterproof valve and a valve controller, the waterproof valve is disposed on a side part of the speaker grille, and the valve controller controls, based on the humidity value of the speaker grille, the waterproof valve to close or open the speaker grille, to prevent external moisture from entering the speaker box and causing damage to the vibration and sound-making apparatus.
In some embodiments, in a thickness direction of the driving diaphragm, a thickness of the speaker box is between 0.05 mm and 0.5 mm.
In some embodiments, the electronic device includes a modulator, and the modulator adjusts an audio signal, so that two driving diaphragms maintain balanced vibration and sound-making.
In some embodiments, the electronic device includes a component cooperating with the display, the main body includes a middle frame and a rear housing, the middle frame includes a support plate, the rear housing and the display are fastened on two opposite sides of the middle frame, the support plate and each of the rear housing and the display are disposed at an interval in a stacked manner, and the component is convexly disposed on the support plate and is isolated from the speaker box; and the speaker box is located between the display and the support plate of the middle frame and is enclosed by the middle frame and the display, the speaker box is located between the rear housing and the support plate of the middle frame and is enclosed by the middle frame and the rear housing, or the speaker box is disposed inside the rear housing.
In some embodiments, the middle frame includes a first end frame and a second end frame that are disposed opposite to each other, a first side frame and a second side frame that are disposed opposite to each other and that are separately connected to the first end frame and the second end frame, and the support plate around which the first end frame, the second end frame, the first side frame, and the second side frame are connected, an isolation frame is disposed on the support plate, and the isolation frame is used as a partial box wall of the speaker box and isolates the component from the driving diaphragm.
In some embodiments, the component is a front-facing camera module, the camera module is located on a side that is of the support plate and that is away from the display, the middle frame includes a first end frame and a second end frame that are disposed opposite to each other, a first side frame and a second side frame that are disposed opposite to each other and that are separately connected to the first end frame and the second end frame, and the support plate around which the first end frame, the second end frame, the first side frame, and the second side frame are connected, a light-through hole opposite to the camera module is disposed on the support plate, and a through hole corresponding to the light-through hole is disposed on the driving diaphragm.
In some embodiments, the rear housing includes a first housing and a second housing, and the first housing and the second housing are snap-fitted to form the speaker box.
In some embodiments, a component of the electronic device is a rear-facing camera module, and a view window is disposed on the second housing and is used by the camera module located on the support plate to collect light; and the driving diaphragm is provided with an opening that is opposite to and in communication with the view window, or the driving diaphragm and the view window are isolated by an isolation frame.
In this embodiment, a middle frame structure is used to isolate a component that needs to cooperate with a rear cover or a display (transparent) and that has a relatively large thickness, such as a speaker box, a driving diaphragm, and a camera module, to avoid mutual interference. In addition, in this embodiment, a structure of the electronic device forms the speaker box, and the electronic device cooperates with the driving diaphragm to implement vibration and sound making. The structure is simple and easy to implement, and internal space of the electronic device is saved. In addition, effects of an earpiece and a speaker or even a stereo sound effect may be achieved, and volume and sound quality can be ensured.
An embodiment provides a vibration and sound-making apparatus, including a case and a driving diaphragm. A speaker box is disposed inside the case and the case is provided with a speaker grille corresponding to the speaker box, the driving diaphragm is fastened inside the speaker box and divides the speaker box into two sub-chambers, the speaker grille is connected to one of the sub-chambers, the driving diaphragm vibrates after receiving an audio signal, the driving diaphragm drives, through vibration of the driving diaphragm, air in the two sub-chambers to vibrate to make a sound, and the sound is spread through the speaker grille. The vibration and sound-making apparatus may be used as an independent audio device to make a sound. The vibration and sound-making apparatus has a simple structure and a small size, and can ensure volume and sound quality.
In some embodiments, there are a plurality of driving diaphragms, the plurality of driving diaphragms are disposed in parallel at intervals in a same direction, and each of the driving diaphragms vibrates by receiving different audio signals, and drives air in the sub-chamber to vibrate, so that the vibration and sound-making apparatus makes sounds in a plurality of different frequency bands.
In some embodiments, a partition wall is further disposed between every two adjacent driving diaphragms, the partition wall divides the speaker box into a plurality of independent speaker sub-boxes, and each speaker sub-box is correspondingly provided with one speaker sub-grille, to ensure a sound effect of each frequency band.
In some embodiments, two speaker boxes are disposed inside the case and there is a driving diaphragm inside each speaker box, the two speaker boxes are arranged in sequence in a length direction of the case, the two speaker boxes are separated by a support body, each speaker box is provided with the speaker grille, and driving diaphragms in the two speaker boxes simultaneously vibrate to make sounds, so that the vibration and sound-making apparatus implements stereo sound making.
In some embodiments, the two speaker boxes are symmetric about the support body, the diaphragms in the two speaker boxes are symmetric about the support body, and the speaker grilles corresponding to the two speaker boxes are symmetric about the support body, to improve a balance of a sound.
In some embodiments, the vibration and sound-making apparatus includes a processor, the processor is electrically connected to the plurality of driving diaphragms in the speaker box, and is configured to: send an audio signal to the driving diaphragm, and control the plurality of driving diaphragms to respectively work in different frequency bands.
In some embodiments, the vibration and sound-making apparatus includes a modulator, and the modulator adjusts an audio signal, so that two driving diaphragms maintain balanced vibration and sound-making.
An embodiment provides an electronic device, including a main body and the vibration and sound-making apparatus. The main body is provided with a through hole corresponding to a speaker grille, and the vibration and sound-making apparatus is disposed inside the main body, so that the electronic device makes a sound.
In some embodiments, the electronic device includes a display, the main body includes a middle frame provided with a support body and a rear housing disposed on the middle frame, the display is disposed on the middle frame, and the display and the rear housing are located on two sides of the support body. The vibration and sound-making apparatus is disposed in a gap between the support body and the rear housing; or the vibration and sound-making apparatus is disposed in a gap between the support body and the display. The electronic device may be a headset, a mobile phone, a notebook computer display, a tablet computer, a personal digital assistant, a portable multimedia player, a navigation device, a smartwatch, and an electronic apparatus that needs a loudspeaker, such as a digital television display or a desktop computer. A display is disposed on the main body, and the vibration and sound-making apparatus is disposed inside the main body, or the vibration and sound-making apparatus is disposed in a gap between the main body and the display. The electronic device in this application uses a vibration and sound-making apparatus that has a simple structure, can generate stereo sound, and has a relatively small size. This is conducive to a light and thin design of the electronic device, and can ensure volume and sound quality of the electronic device.
In the vibration and sound-making apparatus in this application, the driving diaphragm vibrates by receiving an audio signal, and vibration of the driving diaphragm drives air in the two sub-chambers to constantly fluctuate, causing air fluctuation and forming a sound wave. The vibration and sound-making apparatus has a simple structure. When the vibration and sound-making apparatus is applied to the electronic device, the vibration and sound-making apparatus does not need to occupy relatively large space of the electronic device. This facilitates a light and thin design of the electronic device.
To describe the technical solutions in the embodiments of this application more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Definitely, the accompanying drawings in the following description merely show some embodiments of this application, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.
The following clearly describes the technical solutions in the implementations with reference to the accompanying drawings in the implementations.
An embodiment provides a vibration and sound-making apparatus. The vibration and sound-making apparatus may be an electronic device such as a mobile phone, a notebook computer display, a tablet computer, a personal digital assistant, a portable multimedia player, a navigation device, a smartwatch, a headset, a digital television display, or a desktop computer. Certainly, the vibration and sound-making apparatus may alternatively be an independent component, and may be directly disposed inside the foregoing electronic device, so that the electronic device can make a sound. The following describes a vibration and sound-making apparatus by using specific embodiments, including a specific embodiment in which the vibration and sound-making apparatus is an electronic device, a specific embodiment in which the vibration and sound-making apparatus is used as an independent device, and an embodiment in which the vibration and sound-making apparatus that is used as an independent device is disposed in an electronic device that needs to make a sound.
The embodiment of the vibration and sound-making apparatus is described by using an electronic device as an example.
For a first embodiment of the electronic device in the present invention, specifically refer to
In some embodiments, there may be one speaker box, or two speaker boxes may cooperate to implement stereo sound making. A position of the speaker grille cooperating with the speaker box may be set according to an actual requirement, provided that fastening of the driving diaphragm 20 is not affected. There may be one driving diaphragm 20, or a plurality of driving diaphragms 20 may cooperate with each other to implement complete sound making. The speaker box is located between the middle frame 13 and the display 30, and is enclosed by the middle frame 13 and the display 30. Alternatively, the speaker box is located between the rear housing 17 and the middle frame 13, and is enclosed by the rear housing 17 and the middle frame 13. Alternatively, the speaker box is located inside the rear housing 17. In these embodiments, the speaker box is formed mainly by using a structure of the electronic device, the speaker box is simple to form, and an overall thickness of the electronic apparatus can be reduced.
Specifically, the middle frame 13 includes a first end frame 131 and a second end frame 132 that are disposed opposite to each other, a first side frame 133 and a second side frame 134 that are disposed opposite to each other and that are separately connected to the first end frame 131 and the second end frame 132, and a support plate 135 around which the first end frame 131, the second end frame 132, the first side frame 133, and the second side frame 134 are connected. The rear housing 17 and the display 30 are fastened to the middle frame 13 and are located on two opposite sides of the support plate 135. The electronic device 100 further includes a camera module 40, a flash light, a fingerprint module, and other functional components that are disposed on the main body 10 (for example, on the support plate 135 of the middle frame). When there is a need in a specific design of an internal structure of the electronic device, the speaker box or the driving diaphragm avoids the camera module when being disposed, and certainly, may also avoid another electrical component that is disposed on the middle frame 13 and that cooperates with the display 30 or the rear housing 17.
Referring to
Specifically, an adaptation manner in which the speaker box 11 and the driving diaphragm 20 are isolated from the camera module 40 through an isolation frame 136 is as follows: The isolation frame 136 is disposed in a position that is on the support plate 135 on the middle frame 13 and that is close to the second end frame 132. The isolation frame 136 is located between the support plate 135 and the display 30 and is hermetically connected to the support plate 135 and the display 30, and the isolation frame 136 on the middle frame 13 is connected to the first side frame 133 and the second side frame 134. In this embodiment, the display 30 and the support plate 135 are disposed at an interval in a stacked manner to form a gap, and the first end frame 131, the first side frame 133, and the second side frame 134 of the middle frame 13, and the isolation frame 136 surround the gap to form the speaker box 11. The driving diaphragm 20 is located inside the speaker box 11 and is fastened to the box wall. For a specific fastening manner, refer to a subsequent implementation. The driving diaphragm 20 is of a rectangular film structure. In a thickness direction of the driving diaphragm 20, a thickness of the speaker box 11 is between 0.05 mm and 0.5 mm, to provide sufficient vibration space for a vibration amplitude to be achieved by the driving diaphragm 20. The driving diaphragm 20 includes a first side 201 and a second side 202 that are approximately parallel and disposed opposite to each other. The first side 201 faces the display 30, the second side 202 faces the support plate 135 on the middle frame 13, and the driving diaphragm 20 is approximately parallel to the display 30, to ensure uniformity of air driven during vibration. It may be understood that, in another embodiment, there may be an included angle between the driving diaphragm 20 and each of the display 30 and the support plate 135. Actually, provided that volume and sound quality of a sound made by the vibration and sound-making apparatus are not affected, it does not matter, for the vibration and sound-making apparatus in this application, whether the two oppositely disposed surfaces of the driving diaphragm are absolutely parallel, and whether there is an included angle between the driving diaphragm 20 and each of the display 30 and the support plate 135. The speaker grille 12 is formed by arranging a plurality of tiny holes at intervals, and is specifically disposed on the first end frame 131 to connect the speaker box 11 to an external environment, so as to transmit a sound generated in the speaker box 11 to the external environment. Certainly, the speaker grille 12 may alternatively be disposed in another position on the middle frame 13, provided that assembly and sound making of the driving diaphragm 20 are not affected. A regular area is formed between the isolation frame 136 on the middle frame 13 and the second end frame 132, and is used to accommodate a component such as the camera module 40, so that the camera module 40 performs light capture and photographing through a light-capture window disposed on the display, without affecting forming of the speaker box.
A second adaptation manner in which the speaker box 11 and the driving diaphragm 20 are isolated from the camera module in this embodiment is shown in
As shown in
In some embodiments, a protective film (not shown in the figure) is stacked on a surface of the box wall of the speaker box 11, the speaker grille 12 penetrates the protective film, and the protective film prevents external moisture and other impurities from entering the display 30 and the middle frame 13 from the speaker box 11 and damaging an electronic component, to avoid damaging the electronic device 100.
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In the electronic device 100 in this embodiment, the driving diaphragm 20 directly vibrates to make a sound in the speaker box 11. Compared with an existing common speaker, a micro-magnetic speaker, and a micro-vibration motor, this structure is simple and occupies less space, is suitable for a light and thin design of the electronic device, and can ensure volume and sound quality. For an electronic device in the prior art in which a moving magnetic coil and a piezoelectric ceramic element are connected to a screen to drive the screen to vibrate to make a sound, although a sound is made through vibration, the screen needs to be driven by the moving magnetic coil and the piezoelectric ceramic element to vibrate to make a sound, and the vibration is indirect vibration. In this case, weight of the driven screen is relatively high, relatively large driving force is required, and a relatively large amount of power is consumed. This structure cannot be implemented in a headset and a mobile phone with a small battery life. In addition, the screen is fastened all around. Consequently, neither volume nor audio performance of the generated sound can reach a level of a speaker of the electronic apparatus, only an earpiece can be replaced, and the generated sound cannot be used as a speaker sound. In the foregoing electronic device, a light and thin driving diaphragm is used to drive the air in the speaker box to vibrate to make a sound, instead of driving a component with high weight and hardness such as a screen to make a sound. The driving diaphragm is used to directly vibrate the air to make a sound, and no additional driving force is required, so that not only volume and sound effects can be ensured, but also effects of an earpiece and a speaker can be achieved. In addition, an area of the diaphragm can be designed based on internal space of the electronic device, so as to form a large-area vibration to improve volume and sound quality, without consuming relatively large amount of energy.
In a second embodiment of the electronic device shown in the present invention, a difference from the first embodiment lies in that there are a plurality of driving diaphragms, the plurality of driving diaphragms have different areas, and the plurality of driving diaphragms are disposed in parallel at intervals (in sequence) in a same direction. All the driving diaphragms simultaneously vibrate by receiving different audio signals, and drive air in the sub-chambers 111 to vibrate to make sounds in a plurality of different frequency bands, so that the electronic device 100 can implement sound making in all frequency bands. Therefore, a multimodality in each frequency band can be excluded, a distortion effect in each frequency band is reduced, and sound quality of the electronic device 100 is improved. The driving diaphragm in this embodiment is a long strip, and a same direction may be understood as a width direction of the plurality of driving diaphragms. Actually, a plurality of diaphragms in a same speaker box are arranged in sequence on a same plane in the width direction as much as possible, to ensure respective vibration and sound making without wasting space. In this embodiment, the plurality of driving diaphragms are of a same shape without a thickness difference, and an occupied cavity area is reduced. Certainly, there may be a slight difference in shapes of the plurality of driving diaphragms. It should be noted that the thickness of the driving diaphragm in this embodiment may be designed according to an actual application, and is not limited to the cases listed in this embodiment, provided that sound quality can be ensured. In this specification, “a plurality of” means two or more.
Next, for ease of understanding, the electronic device 100 shown in this embodiment is described in detail by using an example in which there are three driving diaphragms 20.
Further, a partition wall is further disposed between every two adjacent driving diaphragms, the partition wall divides the speaker box into a plurality of independent speaker sub-boxes, and each speaker sub-box is correspondingly provided with one speaker sub-grille. The plurality of speaker sub-boxes extend in a same direction and are disposed in parallel, so that audio in different frequency bands is emitted through the independent speaker sub-boxes. Every two driving diaphragms can be separated, so that when the plurality of driving diaphragms vibrate to make a sound, the plurality of driving diaphragms do not interfere with each other, to ensure volume, and improve sound quality of a sound made by the vibration and sound-making apparatus. Specifically, referring to
Further, the electronic device 100 further includes a processor (not shown in the figure), and the processor is electrically connected to the driving diaphragm 20A, the driving diaphragm 20B, and the driving diaphragm 20C, separately sends audio signals to the driving diaphragm 20A, the driving diaphragm 20B, and the driving diaphragm 20C, and controls the driving diaphragm 20A, the driving diaphragm 20B, and the driving diaphragm 20C to simultaneously vibrate and work in different frequency bands, so that the electronic device 100 achieves a consistent and flat frequency response in all frequency bands, and improve sound quality. Certainly, in another embodiment, the three driving diaphragms may partially make sounds to meet an audio requirement of a user. In an implementation, each driving diaphragm is equipped with one driver circuit, the processor outputs a plurality of different audio signals to a plurality of driver circuits, and each driver circuit drives a driving diaphragm connected to the driver circuit to vibrate to make a sound. According to this solution, separate control can be implemented and performance of controlling each driving diaphragm is relatively good. In another implementation, the processor sends a same signal to one driver circuit, and the driver circuit separately transmits the same signal to the plurality of driving diaphragms after frequency division. In this manner, there is a simple structure.
With reference to the foregoing two embodiments, in a third embodiment of this embodiment, a difference from the foregoing two embodiments lies in that there are two sound-making assemblies in this embodiment. To be specific, there are two speaker boxes, and the two speaker boxes are separated by a support body disposed on a support plate on a middle frame and each correspond to a speaker grille. That one or more driving diaphragms are disposed in each speaker box may be understood as that two sound-making assemblies are disposed on the electronic device. It should be noted that in this embodiment, structures of the display, the middle frame, the rear housing, and the speaker box of the electronic device, and a quantity, a fastening manner, and a composition structure of the driving diaphragm in the speaker box may be any one of the foregoing implementations. To be specific, the foregoing corresponding embodiments in this specification may be used for disposing and mutual cooperation of the driving diaphragm and the speaker box in this embodiment. Details are not listed herein one by one. In this implementation, the support body is used as a part of box walls of the two speaker boxes and completely separates the two speaker boxes, so that the two speaker boxes make sounds, and the vibration and sound-making apparatus implements stereo sound making.
Further, the speaker grilles corresponding to the two speaker boxes are symmetric about the support body, so that the two speaker grilles evenly spread sounds in the two speaker boxes. In other words, balanced stereo sound making is implemented.
The following describes an electronic device having a stereo effect by using specific embodiments.
Still referring to
In a case, the driving diaphragm 20 in the speaker box 11A and the driving diaphragm 20 in the speaker box 11B have a same area and shape, the two speaker boxes are symmetric about the support body, and the driving diaphragms in the two speaker boxes are symmetric about the support body, so that the vibration and sound-making apparatus implements a balanced stereo sound. Specifically, referring to
In another implementation, the driving diaphragm 20 in the speaker box 11A and the driving diaphragm 20 in the speaker box 11B have different areas, and the vibration and sound-making apparatus is further connected to a modulator. The modulator adjusts the audio signal, so that the driving diaphragm 20 in the speaker box 11A and the driving diaphragm in the speaker box 11B vibrate in a balanced manner, so as to implement balanced sound making through left and right audio channels. The modulator adjusts, according to a digital signal processing algorithm, audio signals that are input into the driving diaphragms in the two speaker boxes, so that a sound effect is kept balanced when the driving diaphragms in the two speaker boxes vibrate, to implement a balanced stereo sound of the vibration and sound-making apparatus. Alternatively, the two speaker boxes are asymmetric, and the driving diaphragms in the two speaker boxes have a same area or different areas. Alternatively, the modulator may be used to adjust the audio signals, so that the driving diaphragms vibrate in a balanced manner.
In the prior art, a magnetic actuator including a moving magnetic coil, a piezoelectric ceramic element, and the like are connected to a screen to drive the screen to vibrate to make a sound, and a quantity of magnetic actuators needs to be increased to drive a screen with relatively high quality. Consequently, stereo sound sources are separated inevitably unclearly, and even there is no stereo effect. However, in this application, only two independent speaker boxes including driving diaphragms need to be made to form a left audio channel and a right audio channel. In this way, stereo effect can be achieved when the driving diaphragms separately vibrate to make a sound, so that there is a small size and a small loss when sound quality and volume are ensured. In addition, a sound from the left audio channel and a sound from the right audio channel can be balanced.
Referring to
In a case, a stereo sound is ensured to be balanced in the speaker box 11A and the speaker box 11B. The driving diaphragm 1 and the driving diaphragm 4 are symmetric about the support body 13, the driving diaphragm 2 and the driving diaphragm 5 are symmetric about the support body 13, and the driving diaphragm 3 and the driving diaphragm 6 are symmetric about the support body 13, so that in each speaker box, sounds are made in all frequency bands including a high frequency, a medium frequency, and a low frequency. For the speaker box 11A and the speaker box 11B including a plurality of driving diaphragms, the processor may be electrically connected to the driving diaphragms in the speaker box, to control the plurality of driving diaphragms to simultaneously vibrate and respectively work in different frequency bands, so as to implement a flatness feature of sound effects of the left audio channel and the right audio channel. Certainly, when the speaker box 11A and the speaker box 11B work independently, the processor only needs to drive operating frequency bands of a plurality of driving diaphragms in a same speaker box.
In another implementation, modulators are separately disposed in the speaker box 11A and the speaker box 11B. The driving diaphragm 1, the driving diaphragm 2, and the driving diaphragm 3 in the speaker box 11A have different areas, and the driving diaphragm 4, the driving diaphragm 5, and the driving diaphragm 6 in the speaker box 11B have different areas. Audio signals of the driving diaphragms in the two speaker boxes may be adjusted by using the modulator, to achieve a balance. Certainly, quantities of driving diaphragms in the two speaker boxes may be different, and the two speaker boxes and the driving diaphragms may not be symmetric about the support body, provided that sound quality of each speaker box can be ensured and overall stereo sound making and sound quality can be implemented. Examples are not listed one by one herein.
In some embodiments, there are three or more speaker boxes in the electronic device, every two speaker boxes may be disposed in a stacked manner or may be disposed in parallel, and each speaker box corresponds to a speaker grille, so that the three or more speaker boxes simultaneously make sounds in a plurality of different frequency bands, to implement multichannel sound making. In this way, a quantity of dimensions in which the electronic device makes a sound is increased, a stereognostic sense of a sound is improved, and user experience is improved.
In some embodiments, the electronic device includes a waterproof valve and a valve controller, which are not shown in the figure. The waterproof valve is disposed on a side of the speaker grille, and the valve controller controls, based on a humidity value of the speaker grille, the waterproof valve to close or open the speaker grille, to prevent external moisture from entering the speaker box and causing damage to the electronic device. The valve controller includes a control module and a humidity detection module. The humidity detection module is configured to feed back the humidity value of the speaker grille. The control module is electrically connected to the humidity detection module. The control module determines the humidity value of the speaker grille based on the humidity value that is of the speaker grille and that is fed back by the humidity detection module, and controls, based on a determining result, the waterproof valve to close or open the speaker grille, so as to implement intelligent protection for the electronic device.
Referring to
In some embodiments, the electronic device includes a processor (not shown in the figure). The processor may be directly disposed on a circuit board of the electronic device, and is configured to: be electrically connected to a plurality of driving diaphragms in a same speaker box, send audio signals to the plurality of driving diaphragms, and control the plurality of driving diaphragms to respectively work in different frequency bands. In this way, the plurality of driving diaphragms vibrate and drive air in the speaker box to vibrate, to make sounds in a plurality of different frequency bands, so that the electronic device can achieve a consistent and flat frequency response in all frequency bands.
In comparison with an existing device in which a common speaker, a micro-magnetic speaker, and a micro-vibration motor are used, in the electronic device in this embodiment, a speaker box is formed by using a structure of the electronic device, and directly forms a speaker in cooperation with the driving diaphragm, to implement vibration and sound making by vibrating air in the speaker box. In this way, a thickness and a size can be greatly reduced, a light and thin design is implemented, and the driving diaphragm can be disposed in a large area, so that volume and sound quality can be improved, a structure is simple, and practicability is strong. However, for an electronic device in the prior art in which a moving magnetic coil and a piezoelectric ceramic element are connected to a screen to drive the screen to vibrate to make a sound, relatively large driving force is required, only an earpiece can be replaced, and the generated sound cannot be used as a speaker sound. To overcome this disadvantage, in the electronic apparatus, a light and thin driving diaphragm is used to drive the air in the speaker box to vibrate to make a sound, instead of driving a component with high quality and hardness such as a screen to make a sound. The electronic apparatus vibrates air to make a sound, and does not need additional driving force. In this way, not only volume and a sound effect in a speaker mode are ensured and effects of the earpiece and the speaker are achieved, but also energy can be saved.
In some embodiments, the vibration and sound-making apparatus is an independent sound-making component, and may be directly disposed inside the electronic device and used as a sound-making component. This structure is simple and easy to install, and volume and sound quality can be ensured. In other words, a difference between the vibration and sound-making apparatus in this embodiment and the foregoing embodiment of the electronic device is that the speaker box and the driving diaphragm are disposed in a box, and the box is provided with a speaker grille. It may also be understood as that a speaker box of a sound-making assembly is disposed in the box, and a specific quantity of speaker boxes, a form of a driving diaphragm, a fastening manner of the driving diaphragm, and a quantity of driving diaphragms may all be designed according to any one of the foregoing embodiments, without a need to avoid a position of the camera module. The vibration and sound-making apparatus in this embodiment may be directly applied to a mobile phone, a notebook computer display, a tablet, a personal digital assistant, a portable multimedia player, a navigation device, a smartwatch, an earphone, and an electronic device that needs to make a sound, such as a digital television display or a desktop computer. For example, a gap is reserved, without affecting arrangement of other components, between the middle frame and a surface that is of the display and that faces the main body, to accommodate the vibration and sound-making apparatus. The vibration and sound-making apparatus occupies relatively regular space, so that assembly is convenient, and internal design difficulty of the electronic device is not increased. The driving diaphragm can be powered by using the mobile phone. For example, in a specific manner, a lead of a circuit board is connected to an electrode on the driving diaphragm.
To better understand the vibration and sound-making apparatus used as an independent component in this embodiment, the following uses a specific embodiment for detailed description.
For a first embodiment of a vibration and sound-making apparatus in the present invention, refer to
In this embodiment, the case 200A is a square body, and the speaker box 210 is a three-dimensional square space. In other implementations, shapes of the case, the speaker box, and the driving diaphragm may be other shapes, provided that the shapes are applicable to a shape and internal space of an electronic device in the prior art. The case 200A is made of a light and thin material, to ensure that the vibration and sound-making apparatus has a relatively thin size and does not affect vibration and sound-making. Certainly, the case 200A may also be made of another material, provided that sound quality and audio emitted through vibration is not affected. Specifically, the case 200A is made of aluminum alloy, to not only effectively dissipate heat for the vibration and sound-making apparatus, but also reduce a size of the vibration and sound-making apparatus. The side frame 2003 may be made of a material that is more conducive to vibration and sound making of the driving diaphragm 220. Both areas of the driving diaphragm 220 and the case 200A may be set based on an actual area of an electronic device such as a headset, a mobile terminal, or a television display, provided that the case 200A can accommodate the driving diaphragm 220 and it is ensured that the driving diaphragm 220 can vibrate to make a sound. The case 200A can be disposed only by using a gap in the electronic device, and is different from an existing speaker, or the like that has a complex speaker structure, that is combined with the electronic device with a greater difficulty, and that occupies large thickness space. Therefore, a design difficulty and a size can be greatly reduced, and a size of the electronic device can be further reduced. It may be understood that, if the case is made of a material that affects the antenna of the electronic device and is relatively close to the antenna, the case may be shielded by using a shielding structure, which is determined based on an actual design case.
The driving diaphragm 220 is of a rectangular film structure, and may be a diaphragm in any form in the foregoing embodiment, and a fastening manner is selected based on different structures of the driving diaphragm. The driving diaphragm in this embodiment is of a piezoelectric ceramic element structure, and a periphery of the driving diaphragm 220 is fastened to a surface that is of the frame 2003 and that is located inside the speaker box 210, namely, a box wall of the speaker box 210. In a thickness direction of the driving diaphragm 220, a thickness of the speaker box 210 is between 0.05 mm and 0.5 mm. Sufficient vibration space is provided for a vibration amplitude to be achieved by the driving diaphragm 220. The driving diaphragm 220 is approximately parallel to the top cover 2001 and the bottom cover 2002, to ensure uniformity of air driven during vibration. In this specification, fastening the driving diaphragm and the speaker box means that the driving diaphragm is fastened to a side frame, and the driving diaphragm is parallel to the top cover and the bottom cover, so that vibration and sound making can be implemented in an area that is large enough. Certainly, if necessary, the driving diaphragm may also be disposed in another position inside the speaker box. It may be understood that, in another embodiment, there may be an included angle between the driving diaphragm 20 and each of the top cover and the bottom cover. Actually, provided that volume and sound quality of a sound made by the vibration and sound-making apparatus are not affected, whether the two oppositely disposed surfaces of the driving diaphragm are absolutely parallel, and whether there is an included angle between the driving diaphragm and each of the top cover and the bottom cover are both acceptable for the vibration and sound-making apparatus in this application. In this embodiment, there may be a plurality of driving diaphragms. The plurality of driving diaphragms have different areas, and simultaneously receive different audio signals to vibrate to make sounds, so that sounds are made in all frequency bands.
A difference between another embodiment of this embodiment and the foregoing embodiment is that two speaker boxes are disposed inside the case 200A of the vibration and sound-making apparatus, the two speaker boxes are separated by a support body and each correspond a speaker grille. The support body completely isolates the two speaker boxes, so that the two speaker boxes make sounds, and the vibration and sound-making apparatus implement stereo sound making. Further, the speaker grilles corresponding to the two speaker boxes are symmetric about the support body, so that the two speaker grilles evenly spread sounds in the two speaker boxes.
Specifically, referring to
In a case, the two speaker boxes are symmetric about the support body, and the driving diaphragms in the two speaker boxes are symmetric about the support body, so that the vibration and sound-making apparatus implements a balanced stereo sound. In this embodiment, two speaker boxes 250 are symmetric about the support body 280 (which is equivalent to that the two speaker boxes are symmetric by using the support body as a central symmetry line). The driving diaphragms 270 in the two speaker boxes 250 are symmetric about the support body 280 (which is equivalent to that the two driving diaphragms are symmetric by using the support body as a central symmetry line), so that the vibration and sound-making apparatus implements fully balanced stereo sound making, and sound quality of the vibration and sound-making apparatus is improved. Specifically, the two speaker boxes have equal lengths, widths, and heights, and the driving diaphragms 270 in the two speaker boxes 250 have equal areas and thicknesses, to ensure that the two speaker boxes make a balanced stereo sound, and design difficulty is simplified. In this embodiment, the speaker grilles 260 connected to the two speaker boxes 250 are symmetric about the support body 280, so that the two speaker grilles evenly spread sounds in the two speaker boxes, to further implement balanced sound making of the vibration and sound-making apparatus. Certainly, the speaker grille may also be disposed in another position.
In another implementation, the driving diaphragms 270 in the two speaker boxes 250 have different areas, and the vibration and sound-making apparatus is further connected to a modulator. The modulator adjusts an audio signal, so that the driving diaphragms in the speaker boxes vibrate in a balanced manner, so as to implement balanced sound making through left and right audio channels. The modulator adjusts, according to a digital signal processing algorithm, audio signals that are input into the driving diaphragms in the two speaker boxes, so that a sound effect is kept balanced when the driving diaphragms in the two speaker boxes vibrate, to implement a balanced stereo sound of the vibration and sound-making apparatus. Alternatively, the two speaker boxes are asymmetric, and the driving diaphragms in the two speaker boxes have a same area or different areas. Alternatively, the modulator may be used to adjust the audio signals, so that the driving diaphragms vibrate in a balanced manner. The regulator may be disposed on a case, or may be disposed on a circuit board of an electronic device in which the vibration and sound-making apparatus is used.
Referring to
Further, when there are two vibration and sound-making apparatuses 200A, a modulator is disposed inside the electronic device 300. The modulator adjusts an audio signal, so that driving diaphragms in two speaker boxes maintain balanced vibration and sound-making.
The vibration and sound-making apparatus in this embodiment is applied to the electronic device, has a simple structure, and is easy to implement. In addition, instead of driving an element with high quality and hardness such as a screen to make a sound, the driving diaphragm of the vibration and sound-making apparatus vibrates air to make a sound, without needing additional driving force. Therefore, volume and a sound effect can be ensured, an effect of the earpiece and the speaker sound is achieved. In addition, an area of a diaphragm may be designed based on effective space (a distance away from a component such as a camera) in the electronic device, to vibrate in a large area and improve volume and sound quality. This helps design the electronic device, without a need to consume relatively large energy.
The disclosed above is merely example embodiments, and certainly is not intended to limit the protection scope. A person of ordinary skill in the art may understand that all or some of processes that implement the foregoing embodiments and equivalent modifications made in accordance with the claims shall fall within the scope.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201910210343.3 | Mar 2019 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/076423 | 2/24/2020 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2020/186971 | 9/24/2020 | WO | A |
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