Electronic device and method for controlling sound generation of electronic device

Abstract

The present application provides an electronic device, and a method for controlling sound generation of the electronic device. The electronic device comprises a first housing, a second housing, a folding mechanism, a first sound generation apparatus and a second sound generation apparatus. The first housing and the second housing unfold or fold relative to one another by means of the folding mechanism. The first housing is provided with a first sound outlet and a second sound outlet, and the first sound generation apparatus comprises a first diaphragm and a second diaphragm, sound generated by the vibration of the first diaphragm being emitted via the first sound outlet, and sound generated by the vibration of the second diaphragm being emitted via the second sound outlet. The second housing is provided with a third sound outlet and a fourth sound outlet, and the second sound generation apparatus comprises a third diaphragm and a fourth diaphragm, sound generated by the vibration of the third diaphragm being emitted via the third sound outlet, and sound generated by the vibration of the fourth diaphragm being emitted via the fourth sound outlet. When the electronic device is in a closed state, sound emitted from the first sound outlet, the second sound outlet, the third sound outlet and the fourth sound outlet forms a quadrupole, thereby effectively preventing sound leakage.

Description

Electronic device and control method for sound generation of electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411245104.9, filed on September 5, 2024, with the State Intellectual Property Office of China, and entitled "Electronic device and control method for sound generation of electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of sound generation device, and in particular to an electronic device and a control method for sound generation of the electronic device. BACKGROUND

[0003] With the rapid development of consumer electronics industry, consumers have strong demand for various electronic devices. For electronic devices such as smart mobile terminals, consumers also have higher requirements for their audio-visual experience. Folding of smart hardware is an important trend in the current consumer electronics industry. For example, folding mobile phones can provide larger display screens and meet people's pursuit of vision. Audio playback or call leakage problems of electronic devices affect the user experience. In a quiet environment in public places, the user's audio playback or call content is easily heard by people in close proximity, and the privacy is poor. Therefore, to bring a better user experience, it is urgent to improve the anti-leakage sound capability of electronic devices. SUMMARY

[0004] The present application provides an electronic device with good anti-leakage sound effect and a control method for sound generation of the electronic device.

[0005] In a first aspect, an electronic device is provided. The electronic device includes a first housing, a second housing, a folding mechanism, a first sound generation device, and a second sound generation device. The folding mechanism is connected to the first housing and the second housing. The first housing and the second housing are relatively unfolded or folded through the folding mechanism. The first sound generation device is mounted on the first housing. The second sound generation device is mounted on the second housing. The first housing is provided with a first sound outlet and a second sound outlet arranged at intervals. The first sound generation device includes a first diaphragm and a second diaphragm. The sound generated by the vibration of the first diaphragm is transmitted through the first sound outlet. The sound generated by the vibration of the second diaphragm is transmitted through the second sound outlet. The second housing is provided with a third sound outlet and a fourth sound outlet arranged at intervals. The second sound generation device includes a third diaphragm and a fourth diaphragm. The sound generated by the vibration of the third diaphragm is transmitted through the third sound outlet. The sound generated by the vibration of the fourth diaphragm is transmitted through the fourth sound outlet.

[0006] When the electronic device is in the sound leakage prevention mode, the first shell and the second shell are arranged opposite to each other in the first direction, the first direction is the thickness direction of the electronic device, the vibration direction of the first diaphragm is opposite to the vibration direction of the second diaphragm, the vibration direction of the third diaphragm is opposite to the vibration direction of the fourth diaphragm, the vibration direction of the first diaphragm is the same as the vibration direction of the third diaphragm, the first sound outlet and the third sound outlet are connected by a first line, the second sound outlet and the fourth sound outlet are connected by a second line, and the first line and the second line are arranged in a cross manner. The included angle between the central axis direction of the first sound outlet and the central axis direction of the second sound outlet is less than or equal to 10°, and / or the included angle between the central axis direction of the third sound outlet and the central axis direction of the fourth sound outlet is less than or equal to 10°.

[0007] It can be understood that the first diaphragm can include two vibration directions of forward vibration and reverse vibration. When the first diaphragm vibrates forward, it squeezes air, and the gas is discharged from the first sound outlet out of the electronic device. When the first diaphragm vibrates reversely, it causes the gas outside the electronic device to be sucked into the first sound outlet. The vibration directions of other diaphragms can be defined with reference to the vibration direction of the first diaphragm. The vibration direction of the diaphragm in the present application is the relative vibration direction defined above, rather than the absolute vibration direction (i.e. the vibration displacement direction of the diaphragm) in space.

[0008] The first shell and the second shell can be unfolded or folded relative to each other by a folding mechanism, and the electronic device can be switched between an open state and a closed state. When the electronic device is in the sound leakage prevention mode, the electronic device can be in the closed state, and the first shell and the second shell are arranged opposite to each other in the first direction. The first sound outlet and the third sound outlet are connected by a first line, the second sound outlet and the fourth sound outlet are connected by a second line, and the first line and the second line are arranged in a cross manner, forming a structure condition of a four-pole. The cross arrangement means that the projection of the first line on a reference plane and the projection of the second line on the reference plane intersect. The reference plane can be any plane. In space, the first line and the second line can intersect or not intersect. When the electronic device is in the closed state, the vibration direction of the first diaphragm is opposite to the vibration direction of the second diaphragm, and the first sound outlet and the second sound outlet can transmit sound waves with opposite phases; the vibration direction of the third diaphragm is opposite to the vibration direction of the fourth diaphragm, and the third sound outlet and the fourth sound outlet can transmit sound waves with opposite phases; the vibration direction of the first diaphragm is the same as the vibration direction of the third diaphragm, and the first sound outlet and the third sound outlet can transmit sound waves with the same phase. The sound waves transmitted by the first sound outlet, the second sound outlet, the third sound outlet and the fourth sound outlet can form an acoustic four-pole in space. Compared with a dipole, the acoustic four-pole can more effectively reduce sound far-field leakage, effectively improve the call privacy, and has good privacy protection function.

[0009] The included angle between the central axis direction of the first sound outlet and the central axis direction of the second sound outlet can be less than or equal to 10°, so that the orientations of the first sound outlet and the second sound outlet are approximately the same, and the sound emitted by the first sound outlet and the second sound outlet in each direction is more uniform in a plane parallel to the first sound outlet (or the second sound outlet), thereby reducing the risk that the sound is greater in a certain direction in the plane.

[0010] The included angle between the central axis direction of the third sound outlet and the central axis direction of the fourth sound outlet can be less than or equal to 10°, so that the orientations of the third sound outlet and the fourth sound outlet are approximately the same, and the sound emitted by the third sound outlet and the fourth sound outlet in each direction is more uniform in a plane parallel to the third sound outlet (or the fourth sound outlet), thereby reducing the risk that the sound is greater in a certain direction in the plane.

[0011] In some possible implementation manners, the first shell includes a first front surface, a first back surface, and a first top surface, the first front surface and the first back surface are oppositely arranged in the first direction, and the first top surface is connected between the first front surface and the first back surface. When the electronic device is in the sound leakage prevention mode, the first shell and the second shell are oppositely arranged in the first direction, the first front surface faces the second shell, and the first back surface faces away from the second shell. The first sound outlet and the second sound outlet are both arranged on the first back surface.

[0012] It can be understood that when the user plays audio using the sound leakage prevention mode of the electronic device, the first back surface of the electronic device can face the ear of the user. Compared with the scheme in which the first sound outlet and the second sound outlet are arranged on the first top surface of the first shell, in the present embodiment, the first sound outlet and the second sound outlet are arranged on the first back surface, the first sound outlet and the second sound outlet are closer to the ear of the user, the propagation direction of the sound emitted by the first sound outlet and the second sound outlet is toward the side where the ear of the user is located, the user hears greater sound, and the experience of the user is improved.

[0013] In some possible implementation manners, when the electronic device is in the open state, the first shell and the second shell are oppositely unfolded, the first shell and the second shell are arranged side by side along the second direction, and the first direction and the second direction are arranged at an included angle. The line connecting the first sound outlet and the second sound outlet is a third line, and the included angle between the third line and the second direction is an acute angle, or the third line is parallel to the second direction.

[0014] It can be understood that the second direction is the length direction of the electronic device after being opened, and compared with the scheme in which the first sound outlet and the second sound outlet are arranged along the thickness direction of the electronic device, in the present embodiment, the first sound outlet and the second sound outlet can be arranged along the second direction, that is, the first sound outlet and the second sound outlet are arranged along the length direction of the electronic device, and the first sound outlet and the second sound outlet are less restricted, so that the first sound outlet and the second sound outlet can be designed to be larger.

[0015] In some possible implementation manners, the first sound outlet and the second sound outlet are symmetrical about an axis of the first shell, and the axis of the first shell is parallel to the bending axis direction of the electronic device.

[0016] It can be understood that when the user plays audio using the leakage-proof sound mode of the electronic device, the distance between the first sound outlet and the second sound outlet and the user's ear is substantially the same in the second direction, regardless of whether the user holds the electronic device with the left hand or the right hand, and the first sound outlet or the second sound outlet is not closer to the user's ear on the left side or the right side, and the user hears louder sound. When the user uses the electronic device, the user does not need to distinguish between the left hand and the right hand, which is conducive to improving the user experience.

[0017] In some possible implementation manners, the first sound outlet and the second sound outlet are both arranged on the top of the first shell.

[0018] It can be understood that when the user uses the electronic device, the user can hold the bottom of the electronic device, and place the top of the first shell close to the ear, so that the positions of the first sound outlet and the second sound outlet are closer to the user's ear, and the user hears louder sound.

[0019] In some possible implementation manners, the second shell includes a second front surface, a second back surface, and a second top surface, the second front surface and the second back surface are arranged opposite to each other in the first direction, and the second top surface is connected between the second front surface and the second back surface. When the electronic device is in the leakage-proof sound mode, the second front surface faces the first front surface. The third sound outlet and the fourth sound outlet are both arranged on the second top surface.

[0020] It can be understood that the third sound outlet and the fourth sound outlet can be located on the top of the second shell. When the user uses the electronic device, the user can hold the bottom of the electronic device, and place the top of the second shell close to the ear, so that the positions of the third sound outlet and the fourth sound outlet are closer to the user's ear, and the user hears louder sound.

[0021] In some possible implementation manners, the third sound outlet and the fourth sound outlet are a fourth connecting line, and the fourth connecting line and the second direction form an acute angle, or the fourth connecting line is parallel to the second direction.

[0022] It can be understood that, compared with the scheme in which the third sound outlet and the fourth sound outlet are arranged in the thickness direction of the electronic device, in the embodiment, the third sound outlet and the fourth sound outlet can be arranged in the second direction, that is, the third sound outlet and the fourth sound outlet are arranged in the length direction of the electronic device, and the third sound outlet and the fourth sound outlet are less restricted, so that the third sound outlet and the fourth sound outlet can be designed to be larger.

[0023] In some possible implementation manners, the third connecting line and the fourth connecting line are parallel. In this way, compared with the case that the two connecting lines are not parallel, the quadrupole sound field formed by the four sound outlets is more uniform in the sound leakage prevention effect in all directions in the plane formed by the third connecting line and the fourth connecting line.

[0024] In some possible implementation manners, the first sound outlet is circular or strip-shaped.

[0025] In some possible implementation manners, the first sound production apparatus includes two single-diaphragm loudspeakers, and the first diaphragm and the second diaphragm are diaphragms of the two single-diaphragm loudspeakers. Alternatively, the first sound production apparatus includes a double-diaphragm loudspeaker, and the first diaphragm and the second diaphragm are two diaphragms of the double-diaphragm loudspeaker. It can be understood that the first diaphragm and the second diaphragm in the first sound production apparatus can be arranged in various manners, and the specific structure of the first sound production apparatus is not limited in the present application.

[0026] In some possible implementation manners, the first diaphragm and the second diaphragm are two diaphragms of a double-diaphragm loudspeaker. The first diaphragm and the second diaphragm are arranged along the thickness direction of the first diaphragm, or the first diaphragm and the second diaphragm are arranged along the length direction of the first diaphragm.

[0027] It can be understood that when the first diaphragm and the second diaphragm are arranged along the thickness direction of the first diaphragm, the first sound production apparatus can be a front-firing double-diaphragm loudspeaker. When the first diaphragm and the second diaphragm are arranged along the length direction of the first diaphragm, the first sound production apparatus can be a side-firing double-diaphragm loudspeaker.

[0028] In some possible implementation manners, the electronic device further includes a first driver, a second driver, a third driver and a fourth driver, the first driver and the second driver are both mounted on the first shell, and the third driver and the fourth driver are both mounted on the second shell. The first driver is configured to provide a first driving signal to vibrate the first diaphragm, the second driver is configured to provide a second driving signal to vibrate the second diaphragm, the third driver is configured to provide a third driving signal to vibrate the third diaphragm, and the fourth driver is configured to provide a fourth driving signal to vibrate the fourth diaphragm. When the electronic device is in the sound leakage prevention mode, the phase of the first driving signal is opposite to the phase of the second driving signal, the phase of the third driving signal is opposite to the phase of the fourth driving signal, and the phase of the first driving signal is the same as the phase of the third driving signal. When the electronic device is in the external playing mode, the phase of the first driving signal, the phase of the second driving signal, the phase of the third driving signal and the phase of the fourth driving signal are the same.

[0029] It can be understood that the driving signals of the first sound generating device and the second sound generating device do not need to be transmitted through the rotating shaft, and the electrical signal transmission route is relatively simple. The vibrations of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm are controlled by four independent drivers, and are not easily disturbed, the driving signals are more stable, and the symmetry of the vibrations of the four diaphragms is beneficial to be realized, and the sound leakage prevention effect of the electronic device is more optimal. In addition, the vibrations of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm are controlled by four independent drivers, and the vibration directions of the four diaphragms can be independently controlled. For example, when the electronic device is in the sound leakage prevention mode, the first diaphragm and the third diaphragm can be forward vibration, and the second diaphragm and the fourth diaphragm can be reverse vibration; or, when the electronic device is in the sound leakage prevention mode, the first diaphragm and the third diaphragm can be reverse vibration, and the second diaphragm and the fourth diaphragm can be forward vibration.

[0030] In a second aspect, the embodiments of the present application provide a control method for sound generation of a foldable electronic device. The electronic device includes a first shell, a second shell, a folding mechanism, a first sound generating device and a second sound generating device, the folding mechanism is connected to the first shell and the second shell, the first shell and the second shell are relatively unfolded or folded through the folding mechanism, the first sound generating device is installed on the first shell, and the second sound generating device is installed on the second shell. The first shell is provided with a first sound outlet and a second sound outlet arranged at intervals, the first sound generating device includes a first diaphragm and a second diaphragm, the sound emitted by the vibration of the first diaphragm is transmitted through the first sound outlet, and the sound emitted by the vibration of the second diaphragm is transmitted through the second sound outlet. The second shell is provided with a third sound outlet and a fourth sound outlet arranged at intervals, the second sound generating device includes a third diaphragm and a fourth diaphragm, the sound emitted by the vibration of the third diaphragm is transmitted through the third sound outlet, and the sound emitted by the vibration of the fourth diaphragm is transmitted through the fourth sound outlet.

[0031] When the electronic device is in the sound leakage prevention mode, the first shell and the second shell are arranged in a first direction, the first direction is the thickness direction of the electronic device, the vibration direction of the first diaphragm is opposite to the vibration direction of the second diaphragm, the vibration direction of the third diaphragm is opposite to the vibration direction of the fourth diaphragm, the vibration direction of the first diaphragm is the same as the vibration direction of the third diaphragm, the connecting line of the first sound outlet and the third sound outlet is a first connecting line, the connecting line of the second sound outlet and the fourth sound outlet is a second connecting line, and the first connecting line and the second connecting line are cross arranged. The included angle between the central axis direction of the first sound outlet and the central axis direction of the second sound outlet is less than or equal to 10°, and / or the included angle between the central axis direction of the third sound outlet and the central axis direction of the fourth sound outlet is less than or equal to 10°.

[0032] The electronic device further includes a first driver, a second driver, a third driver and a fourth driver, the first driver and the second driver are both installed on the first shell, and the third driver and the fourth driver are both installed on the second shell.

[0033] The control method comprises:

[0034] Confirming a sound emitting mode of the electronic device, wherein the sound emitting mode of the electronic device comprises a leakage sound prevention mode and an external playing mode.

[0035] When the electronic device is in the leakage sound prevention mode, the first driver, the second driver, the third driver and the fourth driver respectively provide a first driving signal, a second driving signal, a third driving signal and a fourth driving signal to respectively drive the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are opposite, the phase of the third driving signal and the phase of the fourth driving signal are opposite, and the phase of the first driving signal and the phase of the third driving signal are the same.

[0036] When the electronic device is in the external playing mode, the first driver, the second driver, the third driver and the fourth driver respectively provide a first driving signal, a second driving signal, a third driving signal and a fourth driving signal to respectively drive the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal, the phase of the second driving signal, the phase of the third driving signal and the phase of the fourth driving signal are the same.

[0037] It can be understood that the vibration of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm is controlled by four independent drivers, is not easily disturbed, the driving signal is more stable, is conducive to realizing the symmetry of the vibration of the four diaphragms, and the leakage sound prevention effect of the electronic device is better.

[0038] In a third aspect, an electronic device is provided. The electronic device includes a first housing, a second housing, a folding mechanism, a first sound emitting device, and a second sound emitting device. The folding mechanism is connected to the first housing and the second housing. The first housing and the second housing are unfolded or folded relative to each other through the folding mechanism. The first sound emitting device is mounted to the first housing. The second sound emitting device is mounted to the second housing. The first housing is provided with a first sound outlet and a second sound outlet arranged at intervals. The first sound emitting device includes a first diaphragm and a second diaphragm. The sound emitted by the vibration of the first diaphragm is transmitted through the first sound outlet. The sound emitted by the vibration of the second diaphragm is transmitted through the second sound outlet. The second housing is provided with a third sound outlet and a fourth sound outlet arranged at intervals. The second sound emitting device includes a third diaphragm and a fourth diaphragm. The sound emitted by the vibration of the third diaphragm is transmitted through the third sound outlet. The sound emitted by the vibration of the fourth diaphragm is transmitted through the fourth sound outlet. When the electronic device is in a sound leakage prevention mode, the first housing and the second housing are arranged relative to each other in a first direction. The first direction is the thickness direction of the electronic device. The vibration direction of the first diaphragm is the same as the vibration direction of the second diaphragm. The vibration direction of the third diaphragm is the same as the vibration direction of the fourth diaphragm. The vibration direction of the first diaphragm is opposite to the vibration direction of the third diaphragm. The connecting line of the second sound outlet, the third sound outlet, and the fourth sound outlet is a first plane. The first sound outlet is located outside the first plane. The connecting line of the first sound outlet and the second sound outlet is a third connecting line. The connecting line of the third sound outlet and the fourth sound outlet is a fourth connecting line. The third connecting line and the fourth connecting line are arranged in a cross manner.

[0039] It can be understood that when the electronic device is in the sound leakage prevention mode, the electronic device is in a closed state. The first housing and the second housing are arranged relative to each other in the first direction. The vibration direction of the first diaphragm is the same as the vibration direction of the second diaphragm. The vibration direction of the third diaphragm is the same as the vibration direction of the fourth diaphragm. The vibration direction of the first diaphragm is opposite to the vibration direction of the third diaphragm. The sound waves emitted by the first sound outlet, the second sound outlet, the third sound outlet, and the fourth sound outlet can form an acoustic quadrupole in space. The electronic device is in the sound leakage prevention mode. It can be understood that compared with a dipole, an acoustic quadrupole can more effectively reduce sound far-field leakage, effectively improve call privacy, and has good privacy protection function.

[0040] When the electronic device is in an external playing mode, the electronic device can be in an open state or a closed state. At this time, the vibration direction of the first diaphragm, the vibration direction of the second diaphragm, the vibration direction of the third diaphragm, and the vibration direction of the fourth diaphragm can be the same. The sound phase of the first sound outlet, the sound phase of the second sound outlet, the sound phase of the third sound outlet, and the sound phase of the fourth sound outlet are the same. Therefore, the four sound waves can be superimposed on each other to provide sufficient sound loudness and higher sound quality performance.

[0041] And, the vibration directions of the diaphragms on the same shell are the same (the vibration direction of the first diaphragm is the same as that of the second diaphragm, and the vibration direction of the third diaphragm is the same as that of the fourth diaphragm), so that the two diaphragms on the same shell can share the driving signal, and the four diaphragms are controlled by two independent driving signals, which is more cost-effective.

[0042] In some possible implementation manners, the first sound outlet and the second sound outlet are located at different heights.

[0043] It can be understood that the first sound outlet and the second sound outlet are arranged at different heights, so that when the first shell and the second shell are arranged opposite to each other in the first direction, the line connecting the second sound outlet, the third sound outlet and the fourth sound outlet forms a first plane, and the first sound outlet can be located outside the first plane to achieve the cross arrangement of the third line and the fourth line.

[0044] In some possible implementation manners, the first shell includes a first front surface, a first back surface and a first top surface, the first front surface and the first back surface are arranged opposite to each other in the first direction, and the first top surface is connected between the first front surface and the first back surface. The second shell includes a second front surface, a second back surface and a second top surface, the second front surface and the second back surface are arranged opposite to each other in the first direction, and the second top surface is connected between the second front surface and the second back surface. When the electronic device is in the sound leakage prevention mode, the first shell and the second shell are arranged opposite to each other in the first direction, the first front surface faces the second front surface of the second shell, and the first back surface faces away from the second shell. The first sound outlet is arranged on the first back surface, the second sound outlet is arranged on the first top surface, and the third sound outlet and the fourth sound outlet are both arranged on the second top surface.

[0045] It can be understood that in the technical solution of the embodiment, the first sound outlet and the second sound outlet can be located at different heights without changing the shape of the first shell, so that the first sound outlet can be located outside the first plane. Moreover, compared with the solution in which the first sound outlet and the second sound outlet are both arranged on the first top surface, the first sound outlet and the second sound outlet are arranged on different surfaces of the first shell, the first sound outlet can be arranged at any position of the first back surface, the second sound outlet can be arranged at any position of the first top surface, the first sound outlet and the second sound outlet are less restricted, the positions of the first sound outlet and the second sound outlet can have more arrangement solutions, and the first sound outlet and the second sound outlet can be larger. In addition, the first sound outlet is located on the first back surface, and the external screen 320 of the electronic device can be arranged on the first back surface. When the user uses the electronic device, the first sound outlet can face the side where the user is located, and when the electronic device makes a sound, the sound wave of the first sound outlet can propagate toward the side where the user is located. Compared with the direction in which the first sound outlet and the second sound outlet are both arranged on the first top surface, the embodiment is conducive to improving the loudness of the sound heard by the user and improving the experience of the user.

[0046] In some possible implementation manners, the symmetry plane of the first housing passes through the first sound outlet and the second sound outlet, the symmetry plane of the first housing is parallel to the bending axis direction of the electronic device, and is parallel to the first direction.

[0047] It can be understood that when the user plays audio using the leakage-proof sound mode of the electronic device, the positions of the first sound outlet and the second sound outlet relative to the ears of the user are approximately the same, and the first sound outlet and the second sound outlet are not closer to the ears of the user on the left side or the right side, and the user hears less sound. When the user uses the electronic device, the user does not need to distinguish between the left hand and the right hand, and the experience of the user is improved.

[0048] In some possible implementation manners, when the electronic device is in the unfolded state, the first housing and the second housing are relatively unfolded, the first housing and the second housing are arranged side by side along the second direction, and the first direction and the second direction are arranged at an included angle. The included angle between the fourth connecting line and the second direction is an acute angle, or the fourth connecting line is parallel to the second direction.

[0049] It can be understood that, compared with the scheme in which the third sound outlet and the fourth sound outlet are arranged along the thickness direction of the electronic device, in the embodiment, the third sound outlet and the fourth sound outlet can be arranged along the second direction, that is, the third sound outlet and the fourth sound outlet are arranged along the length direction of the electronic device, and the third sound outlet and the fourth sound outlet are less restricted, so that the third sound outlet and the fourth sound outlet can be designed to be larger.

[0050] In some possible implementation manners, the third sound outlet and the fourth sound outlet are symmetrical about the axis of the second housing, and the axis of the second housing is parallel to the bending axis direction of the electronic device.

[0051] In this way, when the user plays audio using the leakage-proof sound mode of the electronic device, the positions of the third sound outlet and the fourth sound outlet relative to the ears of the user are approximately the same in the second direction, and the third sound outlet and the fourth sound outlet are not closer to the ears of the user on one side, and the user hears less sound. When the user uses the leakage-proof sound mode of the electronic device, the user does not need to distinguish between the left hand and the right hand, and the experience of the user is improved.

[0052] In some possible implementation manners, the first sound generating device includes two single-diaphragm loudspeakers, and the first diaphragm and the second diaphragm are diaphragms of the two single-diaphragm loudspeakers. Alternatively, the first sound generating device includes a double-diaphragm loudspeaker, and the first diaphragm and the second diaphragm are two diaphragms of the double-diaphragm loudspeaker.

[0053] In some possible implementation manners, the electronic device further includes a first driver and a second driver, the first driver is mounted on the first shell, and the second driver is mounted on the second shell. The first driver is configured to provide a first driving signal to vibrate the first diaphragm and the second diaphragm, and the second driver is configured to provide a second driving signal to vibrate the third diaphragm and the fourth diaphragm. When the electronic device is in the sound leakage prevention mode, the phase of the first driving signal and the phase of the second driving signal are opposite. When the electronic device is in the external playing mode, the phase of the first driving signal and the phase of the second driving signal are the same.

[0054] It can be understood that the first driver can be arranged on the first shell, and the second driver can be arranged on the second shell. The driving signals of the first sound generating device and the second sound generating device do not need to be transmitted through the rotating shaft, and the electrical signal transmission route is relatively simple. In addition, the first diaphragm and the second diaphragm share the same driving signal (the first driving signal), and the vibration direction of the first diaphragm can be the same as the vibration direction of the second diaphragm. The third diaphragm and the fourth diaphragm share the same driving signal (the second driving signal), and the vibration direction of the third diaphragm can be the same as the vibration direction of the fourth diaphragm. In this way, the number of independent drivers included in the electronic device can be reduced, and the cost can be reduced.

[0055] In a fourth aspect, an embodiment of the present application provides a control method for sound generation of a foldable electronic device. The electronic device includes a first shell, a second shell, a folding mechanism, a first sound generating device, and a second sound generating device. The folding mechanism is connected to the first shell and the second shell, and the first shell and the second shell are relatively unfolded or folded through the folding mechanism. The first sound generating device is mounted on the first shell, and the second sound generating device is mounted on the second shell. The first shell is provided with a first sound outlet and a second sound outlet arranged at intervals. The first sound generating device includes a first diaphragm and a second diaphragm. The sound emitted by the vibration of the first diaphragm is transmitted through the first sound outlet, and the sound emitted by the vibration of the second diaphragm is transmitted through the second sound outlet. The second shell is provided with a third sound outlet and a fourth sound outlet arranged at intervals. The second sound generating device includes a third diaphragm and a fourth diaphragm. The sound emitted by the vibration of the third diaphragm is transmitted through the third sound outlet, and the sound emitted by the vibration of the fourth diaphragm is transmitted through the fourth sound outlet. When the electronic device is in a sound leakage prevention mode, the first shell and the second shell are arranged in a first direction relative to each other. The first direction is the thickness direction of the electronic device. The vibration direction of the first diaphragm is the same as the vibration direction of the second diaphragm, and the vibration direction of the third diaphragm is the same as the vibration direction of the fourth diaphragm. The vibration direction of the first diaphragm is opposite to the vibration direction of the third diaphragm. The connecting line of the second sound outlet, the third sound outlet, and the fourth sound outlet is a first plane. The first sound outlet is located outside the first plane. The connecting line of the first sound outlet and the second sound outlet is a third connecting line. The connecting line of the third sound outlet and the fourth sound outlet is a fourth connecting line. The third connecting line and the fourth connecting line are arranged in a cross manner.

[0056] The electronic device further includes a first driver and a second driver, the first driver is mounted on the first housing, and the second driver is mounted on the second housing.

[0057] The control method includes:

[0058] The sound emitting mode of the electronic device is determined, wherein the sound emitting mode of the electronic device includes a leakage sound prevention mode and a loudspeaker mode.

[0059] When the electronic device is in the leakage sound prevention mode, the first driver provides a first driving signal to drive the first diaphragm and the second diaphragm to vibrate, and the second driver provides a second driving signal to drive the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are opposite.

[0060] When the electronic device is in the loudspeaker mode, the first driver provides a first driving signal to drive the first diaphragm and the second diaphragm to vibrate, and the second driver provides a second driving signal to drive the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are the same.

[0061] It can be understood that the first diaphragm and the second diaphragm share the same driving signal, and the vibration direction of the first diaphragm can be the same as the vibration direction of the second diaphragm. The third diaphragm and the fourth diaphragm share the same driving signal, and the vibration direction of the third diaphragm can be the same as the vibration direction of the fourth diaphragm. In this way, the number of independent drivers included in the electronic device can be reduced, and the cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0062] In order to illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be described below.

[0063] FIG. 1 is a structural schematic diagram of an electronic device in an open state according to an embodiment of the present application;

[0064] FIG. 2 is a schematic diagram of one embodiment of the electronic device in a closed state according to an embodiment of the present application;

[0065] FIG. 3 is an exploded schematic diagram of one embodiment of the electronic device according to an embodiment of the present application;

[0066] FIG. 4 is a partial structural schematic diagram of the electronic device in a closed state from another angle according to an embodiment of the present application;

[0067] FIG. 5 is a partial structural schematic diagram of the electronic device in an open state from another angle according to an embodiment of the present application;

[0068] FIG. 6a is a structural schematic diagram of one embodiment of the first sound emitting device and the second sound emitting device according to an embodiment of the present application;

[0069] FIG. 6b is a schematic diagram of an embodiment of the vibration displacement of the first diaphragm and the second diaphragm over time;

[0070] FIG. 7 is a flowchart of a control method for sound generation of an electronic device according to an embodiment of the present application;

[0071] FIG. 8 is a schematic diagram of a structure of another embodiment of an electronic device in a closed state according to an embodiment of the present application;

[0072] FIG. 9 is a schematic diagram of an exploded view of an embodiment of the electronic device shown in FIG. 8;

[0073] FIG. 10 is a schematic diagram of a partial structure of the electronic device shown in FIG. 8 in a closed state from another angle;

[0074] FIG. 11 is a schematic diagram of a partial structure of the electronic device shown in FIG. 8 in an open state from another angle;

[0075] FIG. 12 is a schematic diagram of a structure of another embodiment of the first sound generation device and the second sound generation device shown in FIG. 9;

[0076] FIG. 13 is a flowchart of a control method for sound generation of an electronic device according to another embodiment of the present application. DETAILED DESCRIPTION

[0077] The embodiments of the present application will be described below in conjunction with the accompanying drawings. The embodiments described herein by reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0078] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly defined and limited, the terms "mounting", "connecting" should be understood in a broad sense, for example, "connecting" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. It should be understood that in the present application, "electrical connection" can be understood as physical contact and electrical conduction of elements; or can be understood as the form of connection between different elements in the circuit structure through the entity line of the copper foil or wire of the printed circuit board (PCB) which can transmit electrical signals. "Connecting", "connected" can refer to a mechanical connection relationship or a physical connection relationship, for example, A and B are connected or A and B are connected, which can refer to that there is a fastening component (such as a screw, a bolt, a rivet, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to be separated.

[0079] Further, "fixed" in the present document should also be understood in a broad sense. For example, "fixed" can be direct fixing or indirect fixing through an intermediate medium. "Fixed" means connected to each other and the relative positional relationship after connection is unchanged. The orientation terms mentioned in the embodiments of the present application, such as "upper", "lower", etc., are only the directions of the drawings, therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. "Multiple" means two or more than two.

[0080] In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" in the text only describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, in addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0081] In the embodiments of the present application, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third", "fourth" can explicitly or implicitly include one or more of the features.

[0082] In addition, in the embodiments of the present application, the relative positional relationship mentioned, such as parallel, vertical, aligned, etc. These limits are for the current process level, not an absolute strict limit, and allow a small amount of deviation, approximately parallel, approximately vertical, approximately aligned, etc. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees. For example, A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B can be between 80 degrees and 100 degrees.

[0083] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0084] FIG. 1 is a structural schematic diagram of an electronic device 1000 in an open state according to an embodiment of the present application. It should be noted that the figure only schematically shows some components included in the electronic device 1000, and the actual size, actual position and actual structure of these components are not limited by the figure. Some components are also only schematically shown in the following figures, and the actual size, actual position and actual structure of these components are also not limited by the following figures. Details will not be described below.

[0085] Exemplarily, the electronic device 1000 can be a folding mobile phone, a folding tablet computer, a folding personal computer, a folding notebook computer, a folding vehicle-mounted device, or a folding wearable device. The electronic device 1000 in the embodiment shown in FIG. 1 is exemplarily described as a folding mobile phone. For ease of description, as shown in FIG. 1, the bending axis direction of the electronic device 1000 is defined as the X-axis direction. The thickness direction of the electronic device 1000 is the Z-axis direction. The Y-axis direction is perpendicular to the X-axis direction and perpendicular to the Z-axis direction. In other embodiments, the coordinate system can be flexibly set according to other requirements.

[0086] FIG. 2 is a schematic diagram of an embodiment of the electronic device 1000 in a closed state.

[0087] As shown in FIGS. 1, 2 and 3, the electronic device 1000 includes a first housing 100, a second housing 200, a screen 300 and a folding mechanism 400.

[0088] Exemplarily, the folding mechanism 400 is connected between the first housing 100 and the second housing 200, and the first housing 100 and the second housing 200 can be relatively unfolded or folded through the folding mechanism 400, so that the electronic device 1000 can be switched between an open state and a closed state. FIG. 1 shows that the electronic device 1000 is in the open state. FIG. 2 shows that the electronic device 1000 is in the folded state. It can be understood that due to the accuracy of the preparation process and the assembly process, the opening angle between the first housing 100 and the second housing 200 in the closed state of the electronic device 1000 can also be 2°, 5°, 10°, etc.

[0089] Exemplarily, when the electronic device 1000 is in the closed state, the first housing 100 and the second housing 200 can be relatively folded, and the first housing 100 and the second housing 200 can be relatively arranged in a first direction. The first direction is the thickness direction of the electronic device 1000, that is, the Z-axis direction in the figure. The first housing 100 and the second housing 200 are relatively arranged in the first direction, which means that the projection of the first housing 100 on the second housing 200 along the first direction and the second housing 200 partially overlap. When the electronic device 1000 is in the open state, the first housing 100 and the second housing 200 are relatively unfolded, and the first housing 100 and the second housing 200 can be arranged side by side along a second direction. The second direction and the first direction are arranged at an angle. The second direction perpendicular to the first direction is exemplarily described in the figure.

[0090] The screen 300 can be used to display images and videos, etc. The screen can include a display panel. The display panel can employ a liquid crystal display (LCD), an organic light-emitting diode (OLED) screen, an active-matrix organic light-emitting diode (AMOLED) screen, a mini organic light-emitting diode screen, a micro organic light-emitting diode screen, a micro organic light-emitting diode screen, a quantum dot light emitting diodes (QLED) screen, etc. In some embodiments, the electronic device 1000 can include one or more screens.

[0091] It can be understood that the screen 300 can be an internal screen 310, an external screen 320, or both. When the electronic device 1000 is in a closed state, the image displayed on the internal screen 310 cannot be seen from the outside of the electronic device 1000. The external screen 320 can be used to display images when the electronic device 1000 is in a closed state.

[0092] The screen 300 is taken as an example of including both the internal screen 310 and the external screen 320 in FIGS. 1 and 2. The screen 300 can include the internal screen 310 (i.e., the internal screen 310) and the external screen 320 (i.e., the external screen 320). The internal screen 310 can be spaced apart from the external screen 320 or connected to the external screen 320. The internal screen 310 and the external screen 320 are taken as an example of being spaced apart in FIGS. 1 and 2.

[0093] Exemplarily, the internal screen 310 can include a first display area 311, a second display area 312, and a third display area 313 (distinguished by a dashed line in FIG. 3). The second display area 312 is connected between the first display area 311 and the third display area 313. The second display area 312 can be foldable. The first display area 311 is fixed to the first housing 100, the second display area 312 is fixed to the folding mechanism 400, and the third display area 313 is fixed to the second housing 200. In this way, when the first housing 100 and the second housing 200 are unfolded or folded relative to each other by the folding mechanism 400, the second display area 312 can be caused to fold. The first display area 311 and the third display area 313 can overlap each other in the Z-axis direction.

[0094] Exemplarily, when the electronic device 1000 is in an unfolded state, the first display area 311, the second display area 312, and the third display area 313 are all located on the same side of the first housing 100 and the second housing 200. Exemplarily, the first display area 311, the second display area 312, and the third display area 313 can be substantially 180° (allowing for slight deviations, such as 165°, 177°, or 185°). At this time, the electronic device 1000 has a continuous large-area display region, i.e., the electronic device 1000 can achieve large-screen display, and the user experience is better.

[0095] Exemplarily, when the electronic device 1000 is in a folded state, the second display area 312 can be folded. When the electronic device 1000 is in a closed state, the first display area 311 and the third display area 313 overlap each other in the Z-axis direction. At this time, the X-Y plane size of the electronic device 1000 is small, which is convenient for the user to carry and store. FIG. 2 illustrates that, when the electronic device 1000 is in a closed state, the first display area 311 and the third display area 313 can be between the first housing 100 and the second housing 200.

[0096] FIG. 2 illustrates that, when the electronic device 1000 is in a closed state, the first display area 311 and the third display area 313 can be between the first housing 100 and the second housing 200. In other embodiments, when the screen 300 is an external screen 320, a part of the screen 300 can be located on the side of the first housing 100 away from the second housing 200, and a part of the screen 300 can also be located on the side of the second housing 200 away from the first housing 100. The specific embodiment is not limited.

[0097] Exemplarily, the external screen 320 can be arranged on the side of the first housing 100 away from the internal screen 310. FIG. 2 shows that when the electronic device 1000 is in the closed state, the display surface of the external screen 320 can face the outside of the electronic device 1000, so that the external screen 320 can also be used to display images when the electronic device 1000 is closed. At this time, the user can also operate the electronic device 1000 through the external screen 320 when the electronic device 1000 is in the closed state. In other embodiments, the external screen 320 can also be arranged on the side of the second housing 200 away from the internal screen 310.

[0098] It can be understood that the electronic device 1000 is provided with both the internal screen 310 and the external screen 320, which can meet the display requirements of different sizes. When the user needs a larger display area, the first housing 100 and the second housing 200 of the electronic device 1000 can be opened.

[0099] In other embodiments, the electronic device 1000 can also not include the screen 300.

[0100] In addition, FIG. 1 and FIG. 2 both show that the electronic device 1000 can be folded once. In other embodiments, the electronic device 1000 can also be folded multiple times, and the electronic device 1000 can include more housings and folding mechanisms.

[0101] In addition, FIG. 1 and FIG. 2 both show that the electronic device 1000 is in a horizontal folding mode, and in other embodiments, the electronic device 1000 can also be in a vertical folding mode.

[0102] In some embodiments, the inside of the first housing 100 can have a first accommodating space 101. The inside of the second housing 200 can have a second accommodating space 201. The first accommodating space 101 and the second accommodating space 201 can be used to install electronic devices of the electronic device 1000.

[0103] In some embodiments, the electronic device 1000 further includes a first mainboard 410 and a second mainboard 420. The first mainboard 410 can be installed in the first accommodating space 101, and the second mainboard 420 can be installed in the second accommodating space 201.

[0104] In some embodiments, the electronic device 1000 can also include one or more electronic devices (not shown in the figure). The electronic devices can be installed in the first accommodating space 101 or the second accommodating space 201.

[0105] Exemplarily, the electronic device can include a processor, an external memory interface, an internal memory, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, an audio module, the first sound production apparatus 500, the second sound production apparatus 600, a microphone, a sensor module, and the like. It can be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device 1000. In some other embodiments of the present application, the electronic device 1000 can include more or fewer components, or combine certain components, or split certain components, or different arrangement of components. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0106] Exemplarily, the processor can include one or more processing units, for example: the processor can include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units can be independent devices, or can be integrated in one or more processors.

[0107] Among them, the controller can generate operation control signals according to instruction operation codes and timing signals, complete the control of fetching instructions and executing instructions.

[0108] The memory in the processor can also be provided for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory can save instructions or data that the processor has just used or repeatedly uses. If the processor needs to use the instructions or data again, it can be directly called from the memory. Avoiding repeated access reduces the waiting time of the processor, thus improving the efficiency of the system.

[0109] In some embodiments, the processor can include one or more interfaces. The interfaces can include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI) interface, a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0110] The I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor can include multiple sets of I2C buses. The processor can be coupled to a touch sensor, a charger, a flash, a camera, etc. through different I2C bus interfaces respectively. For example, the processor can be coupled to the touch sensor through an I2C interface, so that the processor and the touch sensor can communicate through the I2C bus interface to realize the touch function of the electronic device 1000.

[0111] The I2S interface can be used for audio communication. In some embodiments, the processor can include multiple sets of I2S buses. The processor can be coupled to an audio module through an I2S bus to realize communication between the processor and the audio module.

[0112] The PCM interface can also be used for audio communication to sample, quantize and encode analog signals.

[0113] The MIPI interface can be used to connect the processor and devices such as a screen and a camera. The MIPI interface includes a camera serial interface (CSI), a display serial interface (DSI), etc. In some embodiments, the processor and the screen communicate through the DSI interface to realize the display function of the electronic device 1000.

[0114] The USB interface is an interface that conforms to the USB standard specification, and can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface can be used to connect a charger to charge the electronic device 1000, and can also be used to transmit data between the electronic device 1000 and a peripheral device. It can also be used to connect a headset to play audio through the headset. The interface can also be used to connect other electronic devices 1000, such as AR devices, etc.

[0115] It can be understood that the interface connection relationship between the modules shown in the embodiments of the present application is only illustrative and does not constitute a structural limitation of the electronic device 1000. In some other embodiments of the present application, the electronic device 1000 can also use different interface connection methods or combinations of multiple interface connection methods.

[0116] The charging management module is used to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module can receive charging input from a wired charger through the USB interface. In some wireless charging embodiments, the charging management module can receive wireless charging input through the wireless charging coil of the electronic device 1000. The charging management module can charge the battery while also providing power to the electronic device 1000 through the power management module.

[0117] The power management module is used to connect the battery and the charging management module to the processor. The power management module receives input from the battery and / or the charging management module to provide power to the processor, internal memory, screen, camera, wireless communication module, etc. The power management module can also be used to monitor battery capacity, battery cycle count, battery health status (leakage, impedance), etc. In some other embodiments, the power management module can also be provided in the processor. In some other embodiments, the power management module and the charging management module can also be provided in the same device.

[0118] The electronic device 1000 can realize audio functions through the audio module, the first sound generating device 500, the second sound generating device 600, the microphone, and the application processor, etc. For example, music playing, recording, etc.

[0119] The audio module is used to convert digital audio information into analog audio signals and to convert analog audio input into digital audio signals. The audio module can also be used to encode and decode audio signals. In some embodiments, the audio module can be provided in the processor, or some functional modules of the audio module can be provided in the processor.

[0120] The first sound generating device 500 and the second sound generating device 600 can be used to convert an audio electrical signal into a sound signal. The electronic device 1000 can listen to music or listen to a call through the first sound generating device 500 and the second sound generating device 600.

[0121] A microphone, also called a "microphone", "microphone", is used to convert a sound signal into an electrical signal. When making a call or sending a voice message, the user can speak into the microphone by placing the mouth close to the microphone to input the sound signal into the microphone. The electronic device 1000 can be provided with at least one microphone. In other embodiments, the electronic device 1000 can be provided with two microphones, in addition to collecting sound signals, it can also realize the function of noise reduction. In other embodiments, the electronic device 1000 can also be provided with three, four or more microphones, which can realize the functions of collecting sound signals, noise reduction, identifying sound sources, realizing directional recording functions, etc.

[0122] The sensor module can include one or more of a pressure sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, and a bone conduction sensor.

[0123] It can be understood that the designer can install different electronic devices on the first housing 100 or the second housing 200 according to the needs. For example, the battery, the antenna, the charging management module, the camera module, the processor and the audio module can be installed on the first housing 100 and electrically connected to the first mainboard 410. The internal memory and the microphone can be installed on the second housing 200 and electrically connected to the second mainboard 420. Exemplarily, the electronic devices and the first mainboard 410 or the electronic devices and the second mainboard 420 can be electrically connected by arranging a flexible circuit board.

[0124] It can be understood that in the electronic devices, the number of one type of electronic device is not limited to one, and the number of electronic devices can be one or more according to the needs. Exemplarily, the number of processors can be two, one processor is installed on the first mainboard and electrically connected to the electronic devices on the first housing 100; another processor is installed on the second mainboard and electrically connected to the electronic devices on the second housing 200. In this way, the two processors can be used to process the work of the devices on the first housing 100 and the second housing 200 respectively, reducing the cross-axis signal transmission.

[0125] FIG. 4 is a partial structural schematic view of the electronic device 1000 shown in FIG. 1 from another angle in a closed state. FIG. 5 is a partial structural schematic view of the electronic device 1000 shown in FIG. 1 from another angle in an open state.

[0126] As shown in FIGS. 4 and 5, a top end surface of the first housing 100 is a first top surface 102, and a top end surface of the second housing 200 is a second top surface 202. The top end surface of the first housing 100 is an end surface of the first housing 100 that is farthest from the ground when the electronic device 1000 is used by a user. The top end surface of the second housing 200 is an end surface of the second housing 200 that is farthest from the ground when the electronic device 1000 is used by a user.

[0127] For example, the first housing 100 can include a first front surface 103 and a first back surface 104 disposed opposite each other. The second housing 200 can include a second front surface 203 and a second back surface 204 disposed opposite each other. When the electronic device 1000 is in the closed state, the first housing 100 and the second housing 200 are disposed opposite each other in the first direction. The first front surface 103 faces the second housing 200, i.e., faces the second front surface 203, and the first back surface 104 is disposed on a side of the first front surface 103 that is farthest from the second front surface 203. The first back surface 104 and the second back surface 204 are outer surfaces of the electronic device 1000, i.e., face the outside of the electronic device 1000. The internal screen 310 can be mounted to the first front surface 103 of the first housing 100 and the second front surface 203 of the second housing 200. The external screen 320 can be mounted to the first back surface 104.

[0128] For example, the first top surface 102 is connected between the first front surface 103 and the first back surface 104. The second top surface 202 is connected between the second front surface 203 and the second back surface 204.

[0129] FIG. 6a is a structural schematic view of an embodiment of the first sound emitting device 500 and the second sound emitting device 600 shown in FIG. 3.

[0130] As shown in FIGS. 3 to 6a, the first sound emitting device 500 can be mounted to the first accommodation space 101 of the first housing 100, and the second sound emitting device 600 can be mounted to the second accommodation space 201 of the second housing 200.

[0131] In some embodiments, the first housing 100 is provided with a first sound outlet 105 and a second sound outlet 106 disposed apart from each other. The first sound outlet 105 can communicate the inside of the first housing 100 with the outside environment. The second sound outlet 106 can communicate the inside of the first housing 100 with the outside environment. For example, the first sound outlet 105 can communicate the first accommodation space 101 of the first housing 100 with the outside environment. The second sound outlet 106 can communicate the first accommodation space 101 of the first housing 100 with the outside environment.

[0132] In some embodiments, the first sound generating device 500 includes a first diaphragm 520 and a second diaphragm 530. The first diaphragm 520 vibrates to generate sound that can be transmitted through the first sound outlet 105. The second diaphragm 530 vibrates to generate sound that can be transmitted through the second sound outlet 106. It can be appreciated that the first diaphragm 520 and the second diaphragm 530 in the first sound generating device 500 can be arranged in various ways. Some examples are listed below for reference:

[0133] In some embodiments, the first sound generating device 500 can include two single-diaphragm speakers (as shown in FIG. 6a). The first diaphragm 520 can be the diaphragm of one of the single-diaphragm speakers, and the second diaphragm 530 can be the diaphragm of the other single-diaphragm speaker. For example, one single-diaphragm speaker can include a first housing 511 and the first diaphragm 520. The other single-diaphragm speaker can include a second housing 512 and the second diaphragm 530. The first diaphragm 520 can be enclosed with the first housing 511 to form a first acoustic cavity (not shown in the figure), which can be in communication with the first sound outlet 105. The second diaphragm 530 can be enclosed with the second housing 512 to form a second acoustic cavity (not shown in the figure), which can be in communication with the second sound outlet 106.

[0134] It can be appreciated that the first acoustic cavity can be in direct communication with the first sound outlet 105, or in indirect communication with the first sound outlet 105. The second acoustic cavity can be in direct communication with the second sound outlet 106, or in indirect communication with the second sound outlet 106.

[0135] In some embodiments, the first sound generating device 500 can further include a first acoustic duct 540 and a second acoustic duct 550. One end of the first acoustic duct 540 is in communication with the first acoustic cavity, and the other end is in communication with the first sound outlet 105. The first acoustic cavity can be in communication with the first sound outlet 105 through the first acoustic duct 540. One end of the second acoustic duct 550 is in communication with the second acoustic cavity, and the other end is in communication with the second sound outlet 106. The second acoustic cavity can be in communication with the second sound outlet 106 through the second acoustic duct 550. It can be understood that by providing the first acoustic duct 540 and the second acoustic duct 550, the first acoustic cavity can be indirectly in communication with the first sound outlet 105, and the second acoustic cavity can be indirectly in communication with the second sound outlet 106. The positions of the first diaphragm and the first acoustic cavity on the first housing 100 can be adjusted according to the adaptability of the internal components of the first housing 100, and there is no requirement that the first diaphragm and the first acoustic cavity must be arranged near the first sound outlet 105. The positions of the second diaphragm and the second acoustic cavity on the first housing 100 can be adjusted according to the adaptability of the internal components of the first housing 100, and there is no requirement that the second diaphragm and the second acoustic cavity must be arranged near the second sound outlet 106. It is only necessary to adjust the lengths and shapes of the first acoustic duct 540 and the second acoustic duct 550, so as to conduct the sound in the first acoustic cavity and the second acoustic cavity to the first sound outlet 105 and the second sound outlet 106. Exemplarily, the first acoustic duct 540 and the second acoustic duct 550 can be part of two single-diaphragm loudspeakers, respectively.

[0136] In other embodiments, the first sound generating device 500 can also not include the first acoustic duct 540 and / or the second acoustic duct 550.

[0137] In some embodiments, the first sound generating device 500 can also be a double-diaphragm loudspeaker. The first diaphragm 520 and the second diaphragm 530 can be two diaphragms of the double-diaphragm loudspeaker. Exemplarily, the double-diaphragm loudspeaker can include the first diaphragm 520, the second diaphragm 530, and a housing. The first diaphragm 520, the second diaphragm 530, and the housing enclose the first acoustic cavity and the second acoustic cavity, and the first acoustic cavity and the second acoustic cavity are not in communication.

[0138] In some embodiments, the double-diaphragm loudspeaker can be a facing double-diaphragm loudspeaker, that is, the first diaphragm 520 and the second diaphragm 530 are arranged along the thickness direction of the first diaphragm 520. Alternatively, the double-diaphragm loudspeaker can also be a lateral double-diaphragm loudspeaker, that is, the first diaphragm 520 and the second diaphragm 530 are arranged along the length direction of the first diaphragm 520.

[0139] In other embodiments, the housing of the first sound generating device 500 can reuse internal components of the electronic device 1000, such as the middle frame, circuit board, and other structures of the electronic device 1000, i.e., the first diaphragm 520 can be surrounded by the internal components of the electronic device 1000 to form the first acoustic cavity. Alternatively, the housing of the first sound generating device 500 can be a separately prepared and assembled structure, which is not limited in the present application.

[0140] In other embodiments, the first sound generating device 500 can also be a single-diaphragm loudspeaker. The diaphragm and the first housing 511 form the first acoustic cavity and the second acoustic cavity, which are located on the two sides of the diaphragm, respectively. That is, one of the first acoustic cavity and the second acoustic cavity is the front cavity of the single-diaphragm loudspeaker, and the other is the back cavity. One of the first sound outlet 105 and the second sound outlet 106 communicates with the front cavity, and the other communicates with the back cavity.

[0141] For example, the first sound outlet 105 and the second sound outlet 106 are arranged in a spaced manner and do not communicate with each other. The first diaphragm 520 vibrates to push the air in the first acoustic cavity to vibrate, and the sound is transmitted from the first sound outlet 105 to the external environment through the first sound outlet channel and can be heard by the user. The second diaphragm 530 vibrates to push the air in the second acoustic cavity to vibrate, and the sound is transmitted from the second sound outlet 106 to the external environment through the second sound outlet channel and can be heard by the user.

[0142] It can be understood that the first diaphragm 520 can include two vibration directions, i.e., forward vibration and reverse vibration. When the first diaphragm 520 vibrates forward, it pushes the air, and the gas is discharged from the first sound outlet 105 to the outside of the electronic device 1000. When the first diaphragm 520 vibrates reversely, it sucks the gas outside the electronic device 1000 from the first sound outlet 105. The vibration direction of the second diaphragm 530 can be defined with reference to the vibration direction of the first diaphragm 520. The vibration direction of the diaphragm in the present application is the relative vibration direction defined above, rather than the absolute vibration direction (i.e., the vibration displacement direction) in space.

[0143] For example, the shape of the first sound outlet 105 can be circular or strip-shaped. Alternatively, the first sound outlet 105 can include a plurality of sub-outlets arranged in a spaced manner, which can be circular or strip-shaped. Alternatively, the first sound outlet 105 can include a plurality of sub-outlets arranged in a spaced manner and having different shapes, e.g., some sub-outlets are circular and some sub-outlets are strip-shaped.

[0144] Exemplarily, the second sound outlet 106 can be circular or strip-shaped. Alternatively, the second sound outlet 106 can include a plurality of sub-outlets arranged at intervals, which can be circular or strip-shaped. Alternatively, the second sound outlet 106 can include a plurality of sub-outlets arranged at intervals and having different shapes, for example, some of the sub-outlets are circular and some of the sub-outlets are strip-shaped.

[0145] It can be understood that the shape of the first sound outlet 105 and the shape of the second sound outlet 106 can be the same or different. For example, both of the first sound outlets 105 can be circular; or both of the first sound outlets 105 can be strip-shaped; or one of the first sound outlets 105 is circular and the other is strip-shaped. It can be understood that the shape of the first sound outlet 105 and the shape of the second sound outlet 106 are not limited to the examples described above, and those skilled in the art can design according to the needs, and the present application does not limit the shape of the first sound outlet 105 and the shape of the second sound outlet 106. The shape of the end of the first acoustic duct connected to the first sound outlet 105 can be adjusted according to the shape of the first sound outlet 105, and the shape of the end of the second acoustic duct connected to the second sound outlet 106 can be adjusted according to the shape of the second sound outlet 106.

[0146] In some embodiments, the first sound outlet 105 and the second sound outlet 106 can be arranged on the top of the first shell 100. In this way, when the user uses the electronic device 1000, the user can hold the bottom of the electronic device 1000 and place the top of the first shell 100 close to the ear, so that the positions of the first sound outlet 105 and the second sound outlet 106 are closer to the user's ear, and the user can hear louder sound. Exemplarily, the first sound outlet 105 can be located at the first top surface 102 or the end of the first back surface 104 close to the first top surface 102 of the first shell 100. The second sound outlet 106 can be located at the first top surface 102 or the end of the first back surface 104 close to the first top surface 102 of the first shell 100. It can be understood that the first sound outlet 105 and the second sound outlet 106 can be located at the first top surface 102 or the first back surface 104, or one of them is located at the first top surface 102 and the other is located at the first back surface 104.

[0147] In some embodiments, the second shell 200 is provided with a third sound outlet 205 and a fourth sound outlet 206 arranged at intervals. The third sound outlet 205 can communicate the inside of the second shell 200 with the external environment. The fourth sound outlet 206 can communicate the inside of the second shell 200 with the external environment. Exemplarily, the third sound outlet 205 can communicate the second accommodating space 201 of the second shell 200 with the external environment. The fourth sound outlet 206 can communicate the second accommodating space 201 of the second shell 200 with the external environment.

[0148] In some embodiments, the second sound generating device 600 can include a third diaphragm 620 and a fourth diaphragm 630. The third diaphragm 620 vibrates to generate sound that can be transmitted to the outside environment through a third sound outlet 205. The fourth diaphragm 630 vibrates to generate sound that can be transmitted to the outside environment through a fourth sound outlet 206. It can be understood that the vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 can be defined with reference to the vibration direction of the first diaphragm 520.

[0149] It can be understood that the second sound generating device 600 can be configured with reference to the first sound generating device 500. The speaker type of the second sound generating device 600 and the first sound generating device 500 can be the same or different. For example, the first sound generating device 500 and the second sound generating device 600 can both be two single-diaphragm speakers (as shown in FIG. 6a); or one of the first sound generating device 500 and the second sound generating device 600 can be two single-diaphragm speakers, and the other can be a double-diaphragm speaker; or the first sound generating device 500 and the second sound generating device 600 can both be opposite double-diaphragm speakers; or the first sound generating device 500 and the second sound generating device 600 can both be horizontal double-diaphragm speakers; or one of the first sound generating device 500 and the second sound generating device 600 can be a horizontal double-diaphragm speaker, and the other can be an opposite double-diaphragm speaker.

[0150] Exemplarily, the speaker type of the second sound generating device 600 and the first sound generating device 500 can be the same. The second sound generating device 600 can include two single-diaphragm speakers. One single-diaphragm speaker includes a third housing 611 and a third diaphragm 620. The other single-diaphragm speaker can include a fourth housing 612 and a fourth diaphragm 630. The third diaphragm 620 can surround a third acoustic cavity (not shown in the figure) with the third housing 611, and the third acoustic cavity can be in communication with the third sound outlet 205. The fourth diaphragm 630 can surround a fourth acoustic cavity (not shown in the figure) with the fourth housing 612, and the fourth acoustic cavity can be in communication with the fourth sound outlet 206. The second sound generating device 600 can further include a third acoustic duct 640 and a fourth acoustic duct 650.

[0151] It can be understood that the third housing 611, the fourth housing 612, the third diaphragm 620, the fourth diaphragm 630, the third acoustic duct 640, and the fourth acoustic duct 650 of the second sound generating device 600 can be configured with reference to the first housing 511, the second housing 512, the first diaphragm 520, the second diaphragm 530, the first acoustic duct 540, and the second acoustic duct 550 of the first sound generating device 500.

[0152] In some embodiments, the third sound outlet 205 can be circular or strip-shaped. Alternatively, the third sound outlet 205 can include a plurality of spaced sub-outlets, which can be circular or strip-shaped. Alternatively, the third sound outlet 205 can include a plurality of spaced sub-outlets with different shapes, for example, some of the sub-outlets are circular and some of the sub-outlets are strip-shaped.

[0153] In some embodiments, the fourth sound outlet 206 can be circular or strip-shaped. Alternatively, the fourth sound outlet 206 can include a plurality of spaced sub-outlets, which can be circular or strip-shaped. Alternatively, the fourth sound outlet 206 can include a plurality of spaced sub-outlets with different shapes, for example, some of the sub-outlets are circular and some of the sub-outlets are strip-shaped.

[0154] It can be understood that the shape of the fourth sound outlet 206 can be the same as or different from the shape of the third sound outlet 205. For example, the third sound outlet 205 and the fourth sound outlet 206 can both be circular or strip-shaped. Alternatively, some of the third sound outlet 205 and the fourth sound outlet 206 can be circular and some of them can be strip-shaped. The shape of the third sound outlet 205 and the shape of the fourth sound outlet 206 can be designed according to requirements, which are not limited in the present application.

[0155] In some embodiments, the third sound outlet 205 and the fourth sound outlet 206 can be located at the top of the second housing 200. In this way, when the user uses the electronic device 1000, the user can hold the bottom of the electronic device 1000 and place the top of the second housing 200 close to the ear. The third sound outlet 205 and the fourth sound outlet 206 are closer to the user's ear, and the user can hear louder sound. For example, the third sound outlet 205 can be located at one end of the second top surface 202 or the second back surface 204 close to the second top surface 202 of the second housing 200. The fourth sound outlet 206 can be located at one end of the second top surface 202 or the second back surface 204 close to the second top surface 202 of the second housing 200. It can be understood that the third sound outlet 205 and the fourth sound outlet 206 can both be located at the second top surface 202 or the second back surface 204, or one of them is located at the second top surface 202 and the other is located at the second back surface 204.

[0156] It can be understood that the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 can be the same, so that the sound phase of the first sound outlet 105 and the sound phase of the second sound outlet 106 are the same; or the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 can be opposite, so that the sound phase of the first sound outlet 105 and the sound phase of the second sound outlet 106 are opposite. The vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 can be the same, so that the sound phase of the third sound outlet 205 and the sound phase of the fourth sound outlet 206 are the same; or the vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 can be opposite, so that the sound phase of the third sound outlet 205 and the sound phase of the fourth sound outlet 206 are opposite. By controlling the vibration direction of the first diaphragm 520, the vibration direction of the second diaphragm 530, the vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630, thereby controlling the sound phase of the first sound outlet 105, the sound phase of the second sound outlet 106, the sound phase of the third sound outlet 205 and the sound phase of the fourth sound outlet 206, so that the electronic device 1000 can be switched between the sound leakage prevention mode (receiver mode, also called RCV mode) and the external playing mode (speaker mode, also called SKP mode).

[0157] FIG. 6b is a schematic diagram of an embodiment of the vibration displacement of the first diaphragm 520 and the second diaphragm 530 changing with time. In FIG. 6b, the abscissa is time, and the ordinate is the vibration displacement of the first diaphragm 520 and the second diaphragm 530. The positive and negative of the ordinate represent the vibration direction of the first diaphragm 520 and the second diaphragm 530. The absolute value of the numerical value represents the displacement distance of the first diaphragm 520 and the second diaphragm 530 compared with the initial position (when not powered). When the ordinate is positive, the first diaphragm 520 and the second diaphragm 530 are positively vibrating, and when the ordinate is negative, the first diaphragm 520 and the second diaphragm 530 are negatively vibrating.

[0158] As shown in FIG. 6b, the first diaphragm 520 and the second diaphragm 530 periodically vibrate over time. The vibration period of the first diaphragm 520 and the second diaphragm 530 is the same.

[0159] It can be understood that the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 are opposite, but not absolutely opposite. That is, the phase difference between the vibration phase (A) of the first diaphragm 520 and the vibration phase (B) of the second diaphragm 530 is not limited to 180° (half the length of the vibration period). Exemplarily, the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 opposite can mean that at the same time, the vibration phase (A) of the first diaphragm 520 and the vibration phase (B) of the second diaphragm 530, A+90°≤B≤A+270°. 90° refers to one-fourth of the length of the vibration period, and 270° refers to three-fourths of the length of the vibration period.

[0160] Similarly, the phase difference between the vibration phase (A) of the first diaphragm 520 and the vibration phase (B) of the second diaphragm 530 is not limited to 180°, and then the phase difference between the sound phase of the first sound outlet 105 and the sound phase of the second sound outlet 106 is also not limited to 180°. The sound phase of the first sound outlet 105 can change according to the change of the vibration phase of the first diaphragm 520. The sound phase of the second sound outlet 106 can change according to the change of the vibration phase of the second diaphragm 530.

[0161] It can be understood that the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 are the same, but not absolutely the same. That is, at the same time, the vibration phase (A) of the first diaphragm 520 and the vibration phase (B) of the second diaphragm 530 can have a certain range of phase difference. Exemplarily, the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 being the same can mean that at the same time, the vibration phase (A) of the first diaphragm 520 and the vibration phase (B) of the second diaphragm 530, A-90°<B<A+90°.

[0162] In addition, all the vibration direction relationships of the two diaphragms in this application can refer to the description of the vibration direction relationship of the first diaphragm 520 and the second diaphragm 530 described above, which will not be repeated here.

[0163] It can be understood that when the user needs to use the electronic device 1000 to play audio, the user can select the electronic device 1000 to be in the sound leakage prevention mode or the external playing mode according to the scene. For example, the scene types can include walking scene, running scene, quiet scene, multiple people talking scene, coffee shop scene, subway scene, train scene, car scene, waiting room scene, conversation scene, office scene, outdoor scene, driving scene, windy scene, airport scene, alarm sound scene, whistle sound scene, crying sound scene, etc. Exemplarily, when the user needs to answer the phone and does not want the call content to be heard by people around, the electronic device 1000 can be in the sound leakage prevention mode. When the user needs to play sound externally, such as playing music, the electronic device 1000 can be in the external playing mode (SKP mode).

[0164] The specific implementation of controlling the vibration direction of the first diaphragm 520, the vibration direction of the second diaphragm 530, the vibration direction of the third diaphragm 620, and the vibration direction of the fourth diaphragm 630, thereby controlling the sound phase of the first sound outlet 105, the sound phase of the second sound outlet 106, the sound phase of the third sound outlet 205, and the sound phase of the fourth sound outlet 206, so that the electronic device 1000 can be switched between the sound leakage prevention mode (receiver mode, also called RCV mode) and the external playing mode (speaker mode, also called SKP mode) will be introduced below.

[0165] In some embodiments, when the electronic device 1000 is in the closed state, the first housing 100 and the second housing 200 are arranged opposite to each other in a first direction, which is the thickness direction of the electronic device 1000, the line connecting the first sound outlet 105 and the third sound outlet 205 is the first line L1, the line connecting the second sound outlet 106 and the fourth sound outlet 206 is the second line L2, and the first line L1 and the second line L2 are arranged intersecting each other. It should be noted that the intersecting arrangement herein means that the projection of the first line L1 on a reference plane and the projection of the second line L2 on the reference plane intersect. The reference plane can be any plane. In space, the first line L1 and the second line L2 can intersect or not intersect. For example, the line connecting the center of the first sound outlet 105 and the center of the second sound outlet 106 forms the first line L1. The line connecting the center of the second sound outlet 106 and the center of the fourth sound outlet 206 forms the second line L2.

[0166] For example, when the electronic device 1000 is in the sound leakage prevention mode, the electronic device 1000 can be in the closed state, the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 are opposite, the first sound outlet 105 and the second sound outlet 106 can transmit sound waves with opposite phases; the vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 are opposite, the third sound outlet 205 and the fourth sound outlet 206 can transmit sound waves with opposite phases; the vibration direction of the first diaphragm 520 and the vibration direction of the third diaphragm 620 are the same, the first sound outlet 105 and the third sound outlet 205 can transmit sound waves with the same phase. In this way, the sound waves transmitted by the first sound outlet 105, the second sound outlet 106, the third sound outlet 205 and the fourth sound outlet 206 can form an acoustic quadrupole in space. It can be understood that, compared with a dipole, an acoustic quadrupole can more effectively reduce sound far-field leakage, effectively improve the call privacy, and has good privacy protection function.

[0167] For example, when the electronic device 1000 is in the open state, the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 are opposite, the first sound outlet 105 and the second sound outlet 106 can transmit sound waves with opposite phases, and the sound waves transmitted by the first sound outlet 105 and the second sound outlet 106 can form an acoustic dipole in space. The vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 are opposite, the third sound outlet 205 and the fourth sound outlet 206 can transmit sound waves with opposite phases, and the sound waves transmitted by the third sound outlet 205 and the fourth sound outlet 206 can form an acoustic dipole in space. At this time, the first sound generating device 500 and the second sound generating device 600 of the electronic device 1000 can also have a certain effect of reducing sound far-field leakage.

[0168] Exemplarily, the electronic device 1000 is in the external mode, and the electronic device 1000 can be in an open state or a closed state. At this time, the vibration directions of the first diaphragm 520, the second diaphragm 530, the third diaphragm 620, and the fourth diaphragm 630 can be made the same, and the sound phases of the first sound outlet 105, the second sound outlet 106, the third sound outlet 205, and the fourth sound outlet 206 are the same, so the four sound waves can be superimposed on each other to provide sufficient sound loudness and higher sound quality performance.

[0169] In some embodiments, when the electronic device 1000 is in the sound leakage prevention mode, the vibration phases of the first diaphragm 520, the second diaphragm 530, the third diaphragm 620, and the fourth diaphragm 630 can be adjusted, the vibration phase of the first diaphragm 520 and the vibration phase of the third diaphragm 620 have a difference, and the vibration phase of the second diaphragm 530 and the vibration phase of the fourth diaphragm 630 have a difference, so that the sound elimination effect of the electronic device 1000 in a certain direction is better.

[0170] In some embodiments, when the electronic device 1000 is in the sound leakage prevention mode, at the same time, the vibration direction of the first diaphragm 520 and the vibration direction of the third diaphragm 620 can be different, and the electronic device 1000 can also achieve four-pole sound elimination.

[0171] In some embodiments, the included angle between the central axis direction of the first sound outlet 105 and the central axis direction of the second sound outlet 106 can be less than or equal to 10°. The central axis of the first sound outlet 105 is perpendicular to the plane where the first sound outlet 105 is located and passes through the center of the first sound outlet 105. The central axis of the second sound outlet 106 is perpendicular to the plane where the second sound outlet 106 is located and passes through the center of the second sound outlet 106. The central axis of the first sound outlet 105 and the central axis of the second sound outlet 106 can intersect or not intersect in space, so that the included angle between the central axis direction of the first sound outlet 105 and the central axis direction of the second sound outlet 106 is less than or equal to 10°, so that the orientations of the first sound outlet 105 and the second sound outlet 106 are approximately the same, and the sound emitted by the first sound outlet 105 and the second sound outlet 106 in each direction in the plane parallel to the first sound outlet 105 (or the second sound outlet 106) is more uniform, reducing the risk of louder sound in a certain direction in the plane. In other embodiments, the included angle between the central axis direction of the first sound outlet 105 and the central axis direction of the second sound outlet 106 can also be less than or equal to 8°, 5°, 3°, or 1°.

[0172] In some embodiments, the first sound outlet 105 and the second sound outlet 106 can be arranged on the first back surface 104 of the first housing 100. It can be understood that when the user plays audio in the sound leakage prevention mode of the electronic device 1000, the first back surface 104 of the electronic device 1000 can be directed towards the user's ear. Compared with the scheme in which the first sound outlet 105 and the second sound outlet 106 are arranged on the first top surface 102 of the first housing 100, in the present embodiment, the first sound outlet 105 and the second sound outlet 106 are arranged on the first back surface 104, the first sound outlet 105 and the second sound outlet 106 are closer to the user's ear, the propagation direction of the sound transmitted by the first sound outlet 105 and the second sound outlet 106 is towards the side where the user's ear is located, and the user can hear louder sound, which is beneficial to improve the user experience.

[0173] In some embodiments, the first sound outlet 105 is directed towards the side away from the first front surface 103 of the first housing 100. The second sound outlet 106 is directed towards the side away from the first front surface 103 of the first housing 100. It can be understood that when the user plays audio in the sound leakage prevention mode of the electronic device 1000, the direction of the first sound outlet 105 and the direction of the second sound outlet 106 are substantially perpendicular to the user's ear, the sound transmitted by the first sound outlet 105 and the second sound outlet 106 can be more received by the user's ear, the user can hear louder sound, which is beneficial to improve the user experience.

[0174] In some embodiments, the first sound outlet 105, the second sound outlet 106 and the external screen 320 of the electronic device 1000 can be on the same side of the first housing 100. For example, the first sound outlet 105, the second sound outlet and the external screen 320 of the electronic device 1000 can be arranged on the first back surface 104 of the first housing 100. In this way, when the electronic device 1000 is in the folded state, the propagation direction of the sound wave transmitted by the first sound outlet 105 and the second sound outlet 106 can be directed towards the user, the user can hear louder sound, which is beneficial to improve the user experience.

[0175] In some embodiments, when the electronic device 1000 is in the open state, the first housing 100 and the second housing 200 are arranged side by side in the second direction, and the first direction and the second direction are arranged at an angle. The line connecting the first sound outlet 105 and the second sound outlet 106 is a third line L3, and the angle between the third line L3 and the second direction can be an acute angle (for example, 60°, 45°, 20°, 10°, etc.), or the third line L3 can be parallel to the second direction. The line connecting the center of the first sound outlet 105 and the center of the second sound outlet 106 forms the third line L3. It can be understood that, compared with the scheme in which the first sound outlet 105 and the second sound outlet 106 are arranged in the thickness direction of the electronic device 1000, in the present embodiment, the first sound outlet 105 and the second sound outlet 106 can be arranged in the second direction, that is, the first sound outlet 105 and the second sound outlet 106 are arranged in the length direction of the electronic device 1000, and the first sound outlet 105 and the second sound outlet 106 are less restricted, so that the first sound outlet 105 and the second sound outlet 106 can be designed to be larger.

[0176] In some embodiments, the first sound outlet 105 and the second sound outlet 106 can be symmetrical about the axis W1 of the first housing 100, and the axis W1 of the first housing 100 is parallel to the bending axis direction of the electronic device 1000. In this way, when the user plays audio using the leakproof sound mode of the electronic device 1000, whether the user holds the electronic device 1000 with the left hand or the right hand, the distance between the first sound outlet 105 and the second sound outlet 106 and the user's ear is substantially the same in the second direction, and the situation that the first sound outlet 105 or the second sound outlet 106 is closer to the user's ear and the user hears louder sound does not occur. When the user uses the electronic device 1000, the user does not need to distinguish between the left hand and the right hand, which is conducive to improving the user's experience.

[0177] In some embodiments, the first sound outlet 105 and the second sound outlet 106 can be located at the same height. Wherein, the first sound outlet 105 and the second sound outlet 106 located at the same height means that, in the height direction (X-axis direction) of the electronic device 1000, the distance from the first sound outlet 105 and the second sound outlet 106 to the first top surface is substantially the same. In this way, when the user plays audio using the leakproof sound mode of the electronic device 1000, the distance between the first sound outlet 105 and the second sound outlet 106 is substantially the same in the height direction of the electronic device 1000, and the user hears more uniform sound.

[0178] In some embodiments, the angle between the central axis direction of the third sound outlet 205 and the central axis direction of the fourth sound outlet 206 can be less than or equal to 10°. The central axis of the third sound outlet 205 is perpendicular to the plane in which the third sound outlet 205 is located and passes through the center of the third sound outlet 205. The central axis of the fourth sound outlet 206 is perpendicular to the plane in which the fourth sound outlet 206 is located and passes through the center of the fourth sound outlet 206. In this way, the orientations of the third sound outlet 205 and the fourth sound outlet 206 are approximately the same, and the sound emitted by the third sound outlet 205 and the fourth sound outlet 206 in each direction in the plane parallel to the third sound outlet 205 (or the fourth sound outlet 206) is more uniform, reducing the risk of the sound being greater in a certain direction in the plane. In other embodiments, the angle between the central axis direction of the third sound outlet 205 and the central axis direction of the fourth sound outlet 206 can also be less than or equal to 8°, 5°, 3°, or 1°.

[0179] In some embodiments, the line connecting the third sound outlet 205 and the fourth sound outlet 206 is the fourth line L4, and the angle between the fourth line L4 and the second direction is an acute angle (for example, 60°, 45°, 20°, 10°, etc.), or the fourth line L4 is parallel to the second direction. The center of the third sound outlet 205 and the center of the fourth sound outlet 206 are connected to form the fourth line L4. It can be understood that, compared with the scheme in which the third sound outlet 205 and the fourth sound outlet 206 are arranged in the thickness direction of the electronic device 1000, in the present embodiment, the third sound outlet 205 and the fourth sound outlet 206 can be arranged in the second direction, that is, the third sound outlet 205 and the fourth sound outlet 206 are arranged in the length direction of the electronic device 1000, and the third sound outlet 205 and the fourth sound outlet 206 are less restricted, so that the third sound outlet 205 and the fourth sound outlet 206 can be designed to be larger.

[0180] In some embodiments, the third line L3 and the fourth line L4 are parallel. Due to manufacturing tolerances, the angle between the first line L1 and the second line L2 can also be 175°, 178°, 183°, etc. In this way, compared with the scheme in which the two lines are not parallel, in the plane formed by the third line L3 and the fourth line L4, the four-pole sound field formed by the four sound outlets is more uniform in preventing sound leakage in each direction.

[0181] In some embodiments, the third sound outlet 205 and the fourth sound outlet 206 can be symmetrical about an axis W2 of the second housing 200, the axis W2 of the second housing 200 being parallel to the bending axis direction of the electronic device 1000. In this way, when the user plays audio using the anti-leak sound mode of the electronic device 1000, the positions of the third sound outlet 205 and the fourth sound outlet 206 relative to the user's ears are approximately the same in the second direction, regardless of whether the user holds the electronic device 1000 with the left hand or the right hand, and the sound heard by the user is not greater on one side. When the user uses the anti-leak sound mode of the electronic device 1000, the user does not need to distinguish between the left hand and the right hand, which is conducive to improving the user's experience.

[0182] In some embodiments, the third sound outlet 205 and the fourth sound outlet 206 can be disposed on the second top surface 202. In this way, the third sound outlet 205 and the fourth sound outlet 206 can be located at the top of the second housing 200. When the user uses the electronic device 1000, the user can hold the bottom of the electronic device 1000 and place the top of the second housing 200 close to the ear, and the positions of the third sound outlet 205 and the fourth sound outlet 206 are closer to the user's ear, and the user hears a louder sound.

[0183] In some embodiments, the third sound outlet 205 and the fourth sound outlet 206 can be located at the same height. Wherein the third sound outlet 205 and the fourth sound outlet 206 are located at the same height means that in the height direction (X-axis direction) of the electronic device 1000, the distances between the third sound outlet 205 and the fourth sound outlet 206 and the second top surface are approximately the same. In this way, when the user plays audio using the anti-leak sound mode of the electronic device 1000, the distances between the third sound outlet 205 and the fourth sound outlet 206 are approximately the same in the height direction of the electronic device 1000, and the user hears a more uniform sound.

[0184] In some embodiments, the electronic device 1000 can further include a first driver, a second driver, a third driver, and a fourth driver (not shown in the figure). The first driver and the second driver can be mounted on the first housing 100. The third driver and the fourth driver can be mounted on the second housing 200. Wherein the first driver is configured to provide a first driving signal to vibrate the first diaphragm 520, the second driver is configured to provide a second driving signal to vibrate the second diaphragm 530, the third driver is configured to provide a third driving signal to vibrate the third diaphragm 620, and the fourth driver is configured to provide a fourth driving signal to vibrate the fourth diaphragm 630.

[0185] Exemplarily, when the electronic device 1000 is in the anti-leakage mode, the phase of the first driving signal and the phase of the second driving signal can be opposite, so that the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 are opposite. The phase of the third driving signal and the phase of the fourth driving signal can be opposite, so that the vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 are opposite. The phase of the first driving signal and the phase of the third driving signal can be the same, so that the vibration direction of the first diaphragm 520 and the vibration direction of the third diaphragm 620 are the same. When the electronic device 1000 is in the external mode, the phase of the first driving signal, the phase of the second driving signal, the phase of the third driving signal and the phase of the fourth driving signal can be the same. It can be understood that the vibration phase of the diaphragm changes according to the phase change of the driving signal, and when the phase of the first driving signal and the phase of the second driving signal are adjusted to have a phase difference, the vibration phase (A) of the first diaphragm 520 and the vibration phase (B) of the second diaphragm 530 can have a phase difference.

[0186] Exemplarily, the first driver, the second driver, the third driver and the fourth driver can be part of the audio module. Exemplarily, the first driver and the second driver can be disposed on the first mainboard. The first driver and the second driver can be integrated in one chip, or can be integrated in two chips respectively, which is not limited in the present application. The third driver and the fourth driver can be disposed on the second mainboard. The third driver and the fourth driver can be integrated in one chip, or can be integrated in two chips respectively, which is not limited in the present application.

[0187] It can be understood that the first sound generating device 500 can be electrically connected to the first main board, and the first driving signal and the second driving signal can be transmitted to the first sound generating device 500 through the first main board respectively. The second sound generating device 600 can be electrically connected to the second main board, and the third driving signal and the fourth driving signal can be transmitted to the second sound generating device 600 through the second main board respectively. In this way, the driving signals of the first sound generating device 500 and the second sound generating device 600 do not need to be transmitted through the rotating shaft, and the electrical signal transmission route is relatively simple. Moreover, the vibrations of the first diaphragm 520, the second diaphragm 530, the third diaphragm 620 and the fourth diaphragm 630 are controlled by four independent drivers, and are not easily disturbed, the driving signals are more stable, and it is beneficial to realize the symmetry of the vibrations of the four diaphragms, and the sound leakage prevention effect of the electronic device 1000 is better. In addition, the vibrations of the first diaphragm 520, the second diaphragm 530, the third diaphragm 620 and the fourth diaphragm 630 are controlled by four independent drivers, and the vibration directions of the four diaphragms can be independently controlled. For example, when the electronic device 1000 is in the sound leakage prevention mode, the first diaphragm 520 and the third diaphragm 620 can be forward vibration, and the second diaphragm 530 and the fourth diaphragm 630 can be reverse vibration; or, when the electronic device 1000 is in the sound leakage prevention mode, the first diaphragm 520 and the third diaphragm 620 can be reverse vibration, and the second diaphragm 530 and the fourth diaphragm 630 can be forward vibration.

[0188] In some embodiments, taking the first sound generating device 500 and the second sound generating device 600 as examples, the first driver, the second driver, the third driver and the fourth driver are introduced to make the first diaphragm 520, the second diaphragm 530, the third diaphragm 620 and the fourth diaphragm 630 vibrate. The first sound generating device 500 can include a first voice coil (not shown in the figure) and a second voice coil (not shown in the figure). The first voice coil and the second voice coil are insulated. The first voice coil is used to drive the vibration of the first diaphragm 520, and the second voice coil is used to drive the vibration of the second diaphragm 530. The second sound generating device 600 can include a third voice coil (not shown in the figure) and a fourth voice coil (not shown in the figure). The third voice coil and the fourth voice coil are insulated. The third voice coil is used to drive the vibration of the third diaphragm 620, and the fourth voice coil is used to drive the vibration of the fourth diaphragm 630. The first driver can be electrically connected to the first voice coil, and the first voice coil is energized to drive the first diaphragm 520 to vibrate. The second driver can be electrically connected to the second voice coil, and the second voice coil is energized to drive the second diaphragm 530 to vibrate. The third driver can be electrically connected to the third voice coil, and the third voice coil is energized to drive the third diaphragm 620 to vibrate. The fourth driver can be electrically connected to the fourth voice coil, and the fourth voice coil is energized to drive the fourth diaphragm 630 to vibrate. In other embodiments, the first sound generating device 500 and the second sound generating device 600 can also be moving iron loudspeakers, micro-electro-mechanical system (MEMS) loudspeakers and planar diaphragm sound generating devices.

[0189] In other embodiments, the first driver, the second driver, the third driver and the fourth driver can also be arranged on the same housing, for example, the first driver, the second driver, the third driver and the fourth driver can be arranged on the first housing 100 / second housing 200. The sound generating device on the housing without the driver can transmit the electrical signal across the axis.

[0190] FIG. 7 is a flowchart of a control method for sound generation of an electronic device 1000 according to an embodiment of the present application.

[0191] As shown in FIG. 7, the present application provides a control method for sound generation of a foldable electronic device 1000. The control method comprises:

[0192] S101: confirming a sound generation mode of the electronic device 1000; wherein the sound generation mode of the electronic device 1000 comprises a leakage sound prevention mode and an external playback mode.

[0193] S102: when the electronic device 1000 is in the leakage sound prevention mode, the first driver, the second driver, the third driver and the fourth driver respectively provide a first driving signal, a second driving signal, a third driving signal and a fourth driving signal to respectively drive the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are opposite, the phase of the third driving signal and the phase of the fourth driving signal are opposite, and the phase of the first driving signal and the phase of the third driving signal are the same.

[0194] When the electronic device 1000 is in the external playback mode, the first driver, the second driver, the third driver and the fourth driver respectively provide a first driving signal, a second driving signal, a third driving signal and a fourth driving signal to respectively drive the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal, the phase of the second driving signal, the phase of the third driving signal and the phase of the fourth driving signal are the same.

[0195] It can be understood that the vibration of the first diaphragm 520, the second diaphragm 530, the third diaphragm 620 and the fourth diaphragm 630 is controlled by four independent drivers, which is not easily disturbed, the driving signal is more stable, and it is beneficial to realize the symmetry of the vibration of the four diaphragms, and the leakage sound prevention effect of the electronic device 1000 is better.

[0196] In some embodiments, after confirming the sound production mode of the electronic device 1000, before providing the first driving signal, the second driving signal, the third driving signal and the fourth driving signal, the control method can further include: detecting the open / close state in which the electronic device 1000 is currently located; wherein when the sound production mode is the leakage sound prevention mode, when the electronic device 1000 is in the open state, prompting the user that the current state of the electronic device 1000 does not support the leakage sound prevention mode, and the electronic device needs to be switched to the closed state; and when the electronic device 1000 is in the closed state, processing the audio signal.

[0197] Exemplarily, the electronic device 1000 can prompt the user by displaying prompt text on the user interface, or prompt the user by voice.

[0198] It can be understood that the four-pole leakage sound prevention mode of the electronic device 1000 is closely related to the open / close state of the electronic device, and the electronic device 1000 is in the four-pole sound elimination state in the closed state, and the electronic device 1000 is in the dipole sound elimination state in the open state. Confirming whether the electronic device 1000 is in the closed state before playing the audio, and prompting the user to adjust the electronic device 1000 to the closed state can more effectively reduce the sound far-field leakage, effectively improve the call privacy, have good privacy protection function, and the user experience is better.

[0199] In some embodiments, the electronic device 1000 can further include a Hall magnet and a Hall sensor (not shown in the figure). One of the Hall magnet and the Hall sensor is arranged on the first shell 100, and the other is arranged on the second shell 200. When the electronic device 1000 is in the closed state, the Hall magnet and the Hall sensor can be arranged opposite to each other. The Hall sensor can be used to detect the magnetic field of the Hall magnet to realize the open / close state detection of the electronic device 1000.

[0200] In some embodiments, the same structure parts as in the foregoing embodiments will not be described again. In the foregoing embodiments, the electronic device 1000 is in the leakage sound prevention mode, the vibration direction of the first diaphragm 520 on the first shell 100 and the vibration direction of the second diaphragm 530 are opposite, and the first diaphragm 520 and the second diaphragm 530 need two different phase electric signals for driving. Hereinafter, an embodiment in which the vibration direction of the first diaphragm 520 on the first shell 100 and the vibration direction of the second diaphragm 530 are the same and can be driven by one driving signal at the same time is introduced.

[0201] FIG. 8 is a structural schematic diagram of another embodiment of the electronic device 1000 in a closed state according to the present application. FIG. 9 is an exploded schematic diagram of an embodiment of the electronic device 1000 shown in FIG. 8. FIG. 10 is a partial structural schematic diagram of the electronic device 1000 shown in FIG. 8 from another angle in a closed state. FIG. 11 is a partial structural schematic diagram of the electronic device 1000 shown in FIG. 8 from another angle in an open state.

[0202] As shown in FIGS. 8-11, the electronic device 1000 can include a first housing 100, a second housing 200, a screen 300, a folding mechanism 400, a first mainboard 410, a second mainboard 420, a first sound production device 500, and a second sound production device 600. The screen 300, the folding mechanism 400, the first mainboard 410, the second mainboard 420, the first sound production device 500, and the second sound production device 600 can be arranged in the same manner as in the previous embodiments. The first housing 100, the second housing 200, and the features in common with the previous embodiments are not repeated here.

[0203] In some embodiments, the first housing 100 can be provided with a first sound outlet 105 and a second sound outlet 106. The second housing 200 can be provided with a third sound outlet 205 and a fourth sound outlet 206. When the electronic device 1000 is in a closed state, the first housing 100 and the second housing 200 are arranged opposite to each other in a first direction, the line connecting the second sound outlet 106, the third sound outlet 205, and the fourth sound outlet 206 forms a first plane, the first sound outlet 105 is located outside the first plane, the line connecting the first sound outlet 105 and the second sound outlet 106 is a third line L3, and the line connecting the third sound outlet 205 and the fourth sound outlet 206 is a fourth line L4. The third line L3 and the fourth line L4 are arranged intersecting each other.

[0204] For example, when the electronic device 1000 is in the sound leakage prevention mode, the electronic device 1000 is in a closed state, the first housing 100 and the second housing 200 are arranged opposite to each other in a first direction, the vibration direction of the first diaphragm 520 is the same as the vibration direction of the second diaphragm 530, the vibration direction of the third diaphragm 620 is the same as the vibration direction of the fourth diaphragm 630, and the vibration direction of the first diaphragm 520 is opposite to the vibration direction of the third diaphragm 620. The sound waves emitted from the first sound outlet 105, the second sound outlet 106, the third sound outlet 205, and the fourth sound outlet 206 can form an acoustic quadrupole in space, and the electronic device 1000 is in the sound leakage prevention mode. It can be understood that, compared with a dipole, an acoustic quadrupole can more effectively reduce sound far-field leakage, effectively improve call privacy, and has good privacy protection function.

[0205] Exemplarily, the electronic device 1000 is in the external mode, and the electronic device 1000 can be in an open state or a closed state. At this time, the vibration directions of the first diaphragm 520, the second diaphragm 530, the third diaphragm 620 and the fourth diaphragm 630 can be made the same, and the sound phases of the first sound outlet 105, the second sound outlet 106, the third sound outlet 205 and the fourth sound outlet 206 are the same, so the four sound waves can be superimposed on each other to provide sufficient sound loudness and higher sound quality performance.

[0206] It can be understood that the diaphragm vibration directions on the same shell are the same (the vibration directions of the first diaphragm 520 and the second diaphragm 530 are the same, and the vibration directions of the third diaphragm 620 and the fourth diaphragm 630 are the same), so that the two diaphragms on the same shell can share the driving signal, and the four diaphragms are controlled by two independent driving signals, which is more cost-effective.

[0207] In some embodiments, the first sound outlet 105 and the second sound outlet 106 are located at different heights. That is, the distances between the first sound outlet 105 and the second sound outlet 106 and the first top surface 102 are different. It can be understood that the first sound outlet 105 and the second sound outlet 106 are arranged at different heights, so that when the first shell 100 and the second shell 200 are relatively arranged in the first direction, the line connecting the second sound outlet 106, the third sound outlet 205 and the fourth sound outlet 206 forms a first plane, and the first sound outlet 105 can be located outside the first plane to realize the cross arrangement of the third line L3 and the fourth line L4.

[0208] Exemplarily, the first sound outlet 105 can be arranged on the first back surface 104, and the second sound outlet 106 can be arranged on the first top surface 102. The third sound outlet 205 and the fourth sound outlet 206 can be arranged on the second top surface 202. In this way, the first sound outlet 105 and the second sound outlet 106 can be located at different heights without changing the shape of the first housing 100, so that the first sound outlet 105 can be located outside the first plane. Moreover, compared with the scheme in which the first sound outlet 105 and the second sound outlet 106 are both arranged on the first top surface 102, the first sound outlet 105 and the second sound outlet 106 are arranged on different surfaces of the first housing 100 respectively, the first sound outlet 105 can be arranged at any position on the first back surface 104, the second sound outlet 106 can be arranged at any position on the first top surface 102, the first sound outlet 105 and the second sound outlet 106 are less restricted, the first sound outlet 105 and the second sound outlet 106 can have more arrangement schemes, and the first sound outlet 105 and the second sound outlet 106 can be arranged larger. In addition, the first sound outlet 105 is located on the first back surface 104, and the external screen 320 of the electronic device 1000 can be arranged on the first back surface 104. When a user uses the electronic device 1000, the first sound outlet 105 can be directed to the side where the user is located, and when the electronic device 1000 makes a sound, the sound wave of the first sound outlet 105 can be propagated to the side where the user is located. Compared with the direction in which the first sound outlet 105 and the second sound outlet 106 are both arranged on the first top surface 102, the embodiment is beneficial to improve the loudness of the sound heard by the user and improve the experience of the user.

[0209] FIG. 12 is a structural schematic diagram of another embodiment of the first sound generating device 500 and the second sound generating device 600 shown in FIG. 9.

[0210] As shown in FIGS. 10 to 12, the first sound generating device 500 can include a first acoustic duct 540 and a second acoustic duct 550. The second sound generating device 600 can include a third acoustic duct 640 and a fourth acoustic duct 650. Compared with the first embodiment, the positions of the first sound outlet 105 and the second sound outlet 106 are adjusted in the embodiment, and the lengths and shapes of the first acoustic duct 540 and the second acoustic duct 550 are also adjusted according to the positions of the first sound outlet 105 and the second sound outlet 106, so that the sound generated by the vibration of the first diaphragm 520 can be transmitted out through the first sound outlet 105 through the third acoustic duct 640, and the sound generated by the vibration of the second diaphragm 530 can be transmitted out through the second sound outlet 106 through the fourth acoustic duct 650.

[0211] In other embodiments, the first sound outlet 105 and the second sound outlet 106 can be both arranged on the first top surface 102, the first top surface 102 can be arranged at an angle with the second top surface 202, or the first top surface 102 is a stepped surface, and the first sound outlet 105 and the second sound outlet 106 can be located on different steps of the stepped surface. In this way, the first sound outlet 105 and the second sound outlet 106 can also be located at different heights.

[0212] As shown in FIGS. 10 and 11, in some embodiments, the symmetry plane S1 of the first housing 100 passes through the first sound outlet 105 and the second sound outlet 106, the symmetry plane S1 of the first housing 100 is parallel to the bending axis direction of the electronic device 1000, and is parallel to the first direction. It can be understood that when the user plays audio using the leakproof sound mode of the electronic device 1000, the positions of the first sound outlet 105 and the second sound outlet 106 relative to the user's ears are approximately the same, regardless of whether the user holds the electronic device 1000 with the left hand or the right hand, and the first sound outlet 105 and the second sound outlet 106 are not closer to the user's ears on the left side or the right side, and the user hears louder sound. When using the electronic device 1000, the user does not need to distinguish between the left and right hands, which is conducive to improving the user's experience.

[0213] In other embodiments, the first sound outlet 105 and the second sound outlet 106 can also be located on one side of the symmetry plane of the first housing 100, or the first sound outlet 105 and the second sound outlet 106 can be located on both sides of the symmetry plane of the first housing 100, respectively.

[0214] In some embodiments, the fourth connecting line L4 can form an acute angle (for example, 60°, 45°, 20°, 10°, etc.) with the second direction, or the fourth connecting line L4 can be parallel to the second direction. It can be understood that compared with the scheme in which the third sound outlet 205 and the fourth sound outlet 206 are arranged in the thickness direction of the electronic device 1000, in the present embodiment, the third sound outlet 205 and the fourth sound outlet 206 can be arranged in the second direction, that is, the third sound outlet 205 and the fourth sound outlet 206 are arranged in the length direction of the electronic device 1000, and the third sound outlet 205 and the fourth sound outlet 206 are less restricted, so that the third sound outlet 205 and the fourth sound outlet 206 can be designed to be larger.

[0215] In some embodiments, the third sound outlet 205 and the fourth sound outlet 206 are symmetrical about an axis W2 of the second housing 200, and the axis W2 of the second housing 200 is parallel to the bending axis direction of the electronic device 1000. In this way, when the user plays audio using the anti-leak sound mode of the electronic device 1000, the positions of the third sound outlet 205 and the fourth sound outlet 206 relative to the user's ears are approximately the same in the second direction, regardless of whether the user holds the electronic device 1000 with the left hand or the right hand, and the sound heard by the user is not greater on one side. When the user uses the anti-leak sound mode of the electronic device 1000, the user does not need to distinguish between the left and right hands, which is conducive to improving the user's experience.

[0216] In other embodiments, the first sound outlet 105 and the second sound outlet 106 can also be arranged on the first housing 100 in a manner interchanged with the third sound outlet 205 and the fourth sound outlet 206 arranged on the second housing 200.

[0217] In some embodiments, the electronic device 1000 can further include a first driver and a second driver (not shown in the figure). The first driver is mounted on the first housing 100. The second driver is mounted on the second housing 200. For example, the first driver can be arranged on the first mainboard. The second driver can be arranged on the second mainboard. The first driver is configured to provide a first driving signal to vibrate the first diaphragm 520 and the second diaphragm 530, and the second driver is configured to provide a second driving signal to vibrate the third diaphragm 620 and the fourth diaphragm 630. It can be understood that the first driver can be arranged on the first housing 100, and the second driver can be arranged on the second housing 200. In this way, the driving signals of the first sound production device 500 and the second sound production device 600 do not need to be transmitted through the rotating shaft, and the electrical signal transmission route is relatively simple. In addition, the first diaphragm 520 and the second diaphragm 530 share the same driving signal (the first driving signal), and the vibration direction of the first diaphragm 520 can be the same as that of the second diaphragm 530. The third diaphragm 620 and the fourth diaphragm 630 share the same driving signal (the second driving signal), and the vibration direction of the third diaphragm 620 can be the same as that of the fourth diaphragm 630. In this way, the number of independent drivers included in the electronic device 1000 can be reduced, and the cost can be reduced.

[0218] For example, when the electronic device 1000 is in the anti-leak sound mode, the phase of the first driving signal and the phase of the second driving signal can be opposite, so that the vibration direction of the first diaphragm 520 and the vibration direction of the third diaphragm 620 are opposite. When the electronic device 1000 is in the external playing mode, the phase of the first driving signal and the phase of the second driving signal can be the same, so that the vibration direction of the first diaphragm 520 and the vibration direction of the third diaphragm 620 are the same.

[0219] In some embodiments, taking the first sound generating device 500 and the second sound generating device 600 as examples of moving coil loudspeakers, the first sound generating device 500 can include a first voice coil (not shown in the figure) and a second voice coil (not shown in the figure). The second sound generating device 600 can include a third voice coil (not shown in the figure) and a fourth voice coil (not shown in the figure). The first voice coil is used for vibration of the first diaphragm 520, and the second voice coil is used for vibration of the second diaphragm 530. The third voice coil is used for vibration of the third diaphragm 620, and the fourth voice coil is used for vibration of the fourth diaphragm 630. The first driver can be electrically connected to the first voice coil and the second voice coil. The second driver can be electrically connected to the third voice coil and the fourth voice coil. In other embodiments, the first sound generating device 500 and the second sound generating device 600 can also be moving iron loudspeakers, micro-electro-mechanical system (MEMS) loudspeakers, and planar diaphragm loudspeakers, etc.

[0220] In other embodiments, the first driver and the second driver can also be arranged on the same housing. The sound generating device on the housing without the driver can transmit the electrical signal across the axis.

[0221] FIG. 13 is a flowchart of a control method for sound generation of an electronic device 1000 according to another embodiment of the present application.

[0222] As shown in FIG. 13, in some embodiments, the present application provides a control method for sound generation of a foldable electronic device 1000. The control method includes:

[0223] S201: confirming a sound generation mode of the electronic device 1000; wherein the sound generation mode of the electronic device 1000 includes a leakage sound prevention mode and an external playing mode.

[0224] S202: when the electronic device 1000 is in the leakage sound prevention mode, the first driver provides a first driving signal to drive the first diaphragm and the second diaphragm to vibrate, and the second driver provides a second driving signal to drive the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are opposite.

[0225] When the electronic device 1000 is in the external playing mode, the first driver provides a first driving signal to drive the first diaphragm and the second diaphragm to vibrate, and the second driver provides a second driving signal to drive the third diaphragm and the fourth diaphragm to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are the same.

[0226] It can be understood that the first diaphragm 520 and the second diaphragm 530 share the same driving signal, and the vibration direction of the first diaphragm 520 can be the same as the vibration direction of the second diaphragm 530. The third diaphragm 620 and the fourth diaphragm 630 share the same driving signal, and the vibration direction of the third diaphragm 620 can be the same as the vibration direction of the fourth diaphragm 630. In this way, the number of independent drivers included in the electronic device 1000 can be reduced, and the cost can be reduced.

[0227] It can be understood that the present application introduces several foldable electronic devices 1000 according to the quadrupole principle to achieve sound leakage prevention. The electronic device 1000 can include a first housing 100, a second housing 200, a folding mechanism, a first sound generating device 500, and a second sound generating device 600. The folding mechanism is connected to the first housing 100 and the second housing 200, and the first housing 100 and the second housing 200 are relatively unfolded or folded through the folding mechanism. The first sound generating device 500 is installed in the first housing 100, and the second sound generating device 600 is installed in the second housing 200.

[0228] The first housing 100 is provided with a first sound outlet 105 and a second sound outlet 106 arranged at intervals, and the first sound generating device 500 includes a first diaphragm 520 and a second diaphragm 530. The sound emitted by the vibration of the first diaphragm 520 is transmitted through the first sound outlet 105, and the sound emitted by the vibration of the second diaphragm 530 is transmitted through the second sound outlet 106. The second housing 200 is provided with a third sound outlet 205 and a fourth sound outlet 206 arranged at intervals, and the second sound generating device 600 includes a third diaphragm 620 and a fourth diaphragm 630. The sound emitted by the vibration of the third diaphragm 620 is transmitted through the third sound outlet 205, and the sound emitted by the vibration of the fourth diaphragm 630 is transmitted through the fourth sound outlet 206.

[0229] It can be understood that when the electronic device 1000 is in the sound leakage prevention mode, the vibration directions of the four membranes 520, 530, 620 and 630 are set to achieve four-pole sound elimination. The vibration direction of the first membrane 520 on the first shell 100 and the vibration direction of the second membrane 530 can be the same or opposite. The vibration direction of the third membrane 620 on the second shell 200 and the vibration direction of the fourth membrane 630 can be the same or opposite. For example, the vibration direction of the first membrane 520 and the vibration direction of the second membrane 530 are opposite, the vibration direction of the third membrane 620 and the vibration direction of the fourth membrane 630 are opposite, and the vibration direction of the first membrane 520 and the vibration direction of the third membrane 620 are the same. The first membrane 520, the second membrane 530, the third membrane 620 and the fourth membrane 630 are controlled by four independent drives, which can better ensure symmetry and the sound leakage prevention capability of the electronic device 1000 is better; for another example, the vibration direction of the first membrane 520 and the vibration direction of the second membrane 530 are the same, the first membrane 520 and the second membrane 530 can share a drive, the vibration direction of the third membrane 620 and the vibration direction of the fourth membrane 630 are the same, the third membrane 620 and the fourth membrane 630 can share a drive, and the electronic device 1000 only needs to set two drives to control the vibration directions of the four membranes, and the cost is better.

[0230] It can be understood that when the electronic device 1000 is in the sound leakage prevention mode, the above two vibration schemes can achieve four-pole sound elimination by designing the arrangement positions of the first sound outlet 105, the second sound outlet 106, the third sound outlet 205 and the fourth sound outlet 206 on the first shell 100 and the second shell 200.

[0231] For example, the vibration direction of the first membrane 520 and the vibration direction of the second membrane 530 are opposite, the vibration direction of the third membrane 620 and the vibration direction of the fourth membrane 630 are opposite, and the vibration direction of the first membrane 520 and the vibration direction of the third membrane 620 are the same. The first shell 100 and the second shell 200 are arranged opposite in the first direction, which is the thickness direction of the electronic device 1000, the line connecting the first sound outlet 105 and the third sound outlet 205 is the first line L1, the line connecting the second sound outlet 106 and the fourth sound outlet 206 is the second line L2, and the first line L1 and the second line L2 are cross arranged to achieve four-pole sound elimination.

[0232] Exemplarily, the vibration direction of the first diaphragm 520 and the vibration direction of the second diaphragm 530 are the same, and the vibration direction of the third diaphragm 620 and the vibration direction of the fourth diaphragm 630 are the same. The first housing 100 and the second housing 200 are oppositely arranged in the first direction, which is the thickness direction of the electronic device 1000. The first housing 100 and the second housing 200 are oppositely arranged in the first direction, and the line connecting the second sound outlet 106, the third sound outlet 205 and the fourth sound outlet 206 forms a first plane. The first sound outlet 105 is located outside the first plane. The line connecting the first sound outlet 105 and the second sound outlet 106 is a third line L3, and the line connecting the third sound outlet 205 and the fourth sound outlet 206 is a fourth line L4. The third line L3 and the fourth line L4 are cross arranged to realize a quadrupole sound elimination.

[0233] It can be understood that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and any combination of the features in different embodiments is also within the protection scope of the present application, that is, the above-described multiple embodiments can also be combined according to actual needs.

[0234] It can be understood that all the above-mentioned drawings are exemplary drawings of the present application, and do not represent the actual size of the product. The size ratio relationship between the components in the drawings is not limited to the actual product of the present application.

[0235] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic device (1000), characterized by, The electronic device (1000) comprises a first shell (100), a second shell (200), a folding mechanism (400), a first sound generating device (500) and a second sound generating device (600), the folding mechanism (400) is connected to the first shell (100) and the second shell (200), the first shell (100) and the second shell (200) are relatively unfolded or folded through the folding mechanism (400), the first sound generating device (500) is installed on the first shell (100), and the second sound generating device (600) is installed on the second shell (200). The first shell (100) is provided with a first sound outlet (105) and a second sound outlet (106) arranged at intervals, the first sound generating device (500) comprises a first diaphragm (520) and a second diaphragm (530), sound generated by vibration of the first diaphragm (520) is transmitted out through the first sound outlet (105), and sound generated by vibration of the second diaphragm (530) is transmitted out through the second sound outlet (106). The second shell (200) is provided with a third sound outlet (205) and a fourth sound outlet (206) arranged at intervals, the second sound generating device (600) comprises a third diaphragm (620) and a fourth diaphragm (630), sound generated by vibration of the third diaphragm (620) is transmitted out through the third sound outlet (205), and sound generated by vibration of the fourth diaphragm (630) is transmitted out through the fourth sound outlet (206). When the electronic device (1000) is in the sound leakage prevention mode, the first shell (100) and the second shell (200) are arranged in a first direction opposite to each other, the first direction is a thickness direction of the electronic device (1000), vibration directions of the first diaphragm (520) and the second diaphragm (530) are opposite, vibration directions of the third diaphragm (620) and the fourth diaphragm (630) are opposite, the vibration direction of the first diaphragm (520) is the same as the vibration direction of the third diaphragm (620), a line connecting the first sound outlet (105) and the third sound outlet (205) is a first line (L1), a line connecting the second sound outlet (106) and the fourth sound outlet (206) is a second line (L2), and the first line (L1) and the second line (L2) are arranged in a cross manner. An included angle between a central axis direction of the first sound outlet (105) and a central axis direction of the second sound outlet (106) is less than or equal to 10°, and / or an included angle between a central axis direction of the third sound outlet (205) and a central axis direction of the fourth sound outlet (206) is less than or equal to 10°.

2. The electronic device (1000) according to claim 1, characterized by, The first shell (100) comprises a first front surface (103), a first back surface (104) and a first top surface (102), the first front surface (103) and the first back surface (104) are arranged opposite to each other in the first direction, and the first top surface (102) is connected between the first front surface (103) and the first back surface (104). The first shell (100) and the second shell (200) are oppositely arranged in the first direction, the first front surface (103) faces the second shell (200), and the first back surface (104) faces away from the second shell (200) when the electronic device (1000) is in the sound leakage prevention mode. The first sound outlet (105) and the second sound outlet (106) are arranged on the first back surface (104).

3. The electronic device (1000) according to claim 1 or 2, characterized by, The first shell (100) and the second shell (200) are oppositely unfolded, and the first shell (100) and the second shell (200) are arranged side by side in a second direction when the electronic device (1000) is in the open state, the first direction and the second direction are arranged at an angle. The line connecting the first sound outlet (105) and the second sound outlet (106) is a third line (L3), and the angle between the third line (L3) and the second direction is an acute angle, or the third line (L3) is parallel to the second direction.

4. The electronic device (1000) according to any one of claims 1 to 3, characterized in that, The first sound outlet (105) and the second sound outlet (106) are symmetrical about the axis (W1) of the first shell (100), and the axis (W1) of the first shell (100) is parallel to the bending axis direction of the electronic device (1000).

5. The electronic device (1000) according to any one of claims 1 to 4, characterized in that, The first sound outlet (105) and the second sound outlet (106) are arranged on the top of the first shell (100).

6. The electronic device (1000) according to claim 2, characterized by, The second shell (200) comprises a second front surface (203), a second back surface (204) and a second top surface (202), the second front surface (203) and the second back surface (204) are oppositely arranged in the first direction, and the second top surface (202) is connected between the second front surface (203) and the second back surface (204). The second front surface (203) faces the first front surface (103) when the electronic device (1000) is in the sound leakage prevention mode. The third sound outlet (205) and the fourth sound outlet (206) are arranged on the second top surface (202).

7. The electronic device (1000) according to claim 3, characterized by, The third sound outlet (205) and the fourth sound outlet (206) are a fourth line (L4), and the angle between the fourth line (L4) and the second direction is an acute angle, or the fourth line (L4) is parallel to the second direction.

8. The electronic device (1000) according to claim 7, characterized by, The third line (L3) and the fourth line (L4) are parallel.

9. The electronic device (1000) according to any one of claims 1 to 8, characterized by, The shape of the first sound outlet (105) is circular or strip-shaped.

10. The electronic device (1000) according to any one of claims 1 to 9, characterized by, The first sound generating device (500) comprises two single diaphragm loudspeakers, and the first diaphragm (520) and the second diaphragm (530) are diaphragms of the two single diaphragm loudspeakers respectively. Alternatively, The first sound generating device (500) comprises a double diaphragm loudspeaker, and the first diaphragm (520) and the second diaphragm (530) are two diaphragms of the double diaphragm loudspeaker.

11. The electronic device (1000) according to claim 10, characterized by, The first diaphragm (520) and the second diaphragm (530) are two diaphragms of the double diaphragm loudspeaker. The first diaphragm (520) and the second diaphragm (530) are arranged along a thickness direction of the first diaphragm (520), or the first diaphragm (520) and the second diaphragm (530) are arranged along a length direction of the first diaphragm (520).

12. The electronic device (1000) according to any one of claims 1 to 11, characterized by, The electronic device (1000) further includes a first driver, a second driver, a third driver, and a fourth driver, the first driver and the second driver are both mounted on the first shell (100), and the third driver and the fourth driver are both mounted on the second shell (200). The first driver is configured to provide a first driving signal to vibrate the first diaphragm (520), the second driver is configured to provide a second driving signal to vibrate the second diaphragm (530), the third driver is configured to provide a third driving signal to vibrate the third diaphragm (620), and the fourth driver is configured to provide a fourth driving signal to vibrate the fourth diaphragm (630). When the electronic device (1000) is in the anti-leakage mode, the phase of the first driving signal and the phase of the second driving signal are opposite, the phase of the third driving signal and the phase of the fourth driving signal are opposite, and the phase of the first driving signal and the phase of the third driving signal are the same. When the electronic device (1000) is in the external playing mode, the phase of the first driving signal, the phase of the second driving signal, the phase of the third driving signal, and the phase of the fourth driving signal are the same.

13. A control method for sound generation of a foldable electronic device (1000), applied to the electronic device (1000) of any one of claims 1 to 11, and having the characteristics that: The electronic device (1000) further includes a first driver, a second driver, a third driver, and a fourth driver, the first driver and the second driver are both mounted on the first shell (100), and the third driver and the fourth driver are both mounted on the second shell (200). The control method includes: Confirming a sound generation mode of the electronic device (1000), wherein the sound generation mode of the electronic device (1000) includes an anti-leakage mode and an external playing mode; When the electronic device (1000) is in the anti-leakage mode, the first driver, the second driver, the third driver, and the fourth driver respectively provide a first driving signal, a second driving signal, a third driving signal, and a fourth driving signal to respectively drive the first diaphragm (520), the second diaphragm (530), the third diaphragm (620), and the fourth diaphragm (630) to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are opposite, the phase of the third driving signal and the phase of the fourth driving signal are opposite, and the phase of the first driving signal and the phase of the third driving signal are the same. When the electronic device (1000) is in the external mode, the first driver, the second driver, the third driver and the fourth driver provide the first driving signal, the second driving signal, the third driving signal and the fourth driving signal respectively to drive the first diaphragm (520), the second diaphragm (530), the third diaphragm (620) and the fourth diaphragm (630) to vibrate respectively, wherein the phase of the first driving signal, the phase of the second driving signal, the phase of the third driving signal and the phase of the fourth driving signal are the same.

14. An electronic device (1000), characterized by, The application relates to a foldable electronic device, which comprises a first shell (100), a second shell (200), a folding mechanism (400), a first sound production device (500) and a second sound production device (600), wherein the folding mechanism (400) is connected to the first shell (100) and the second shell (200), the first shell (100) and the second shell (200) are relatively unfolded or folded through the folding mechanism (400), the first sound production device (500) is installed on the first shell (100), and the second sound production device (600) is installed on the second shell (200). The first shell (100) is provided with a first sound outlet (105) and a second sound outlet (106) which are arranged at intervals, the first sound production device (500) comprises a first diaphragm (520) and a second diaphragm (530), the first diaphragm (520) vibrates to emit sound which is transmitted through the first sound outlet (105), and the second diaphragm (530) vibrates to emit sound which is transmitted through the second sound outlet (106). The second shell (200) is provided with a third sound outlet (205) and a fourth sound outlet (206) which are arranged at intervals, the second sound production device (600) comprises a third diaphragm (620) and a fourth diaphragm (630), the third diaphragm (620) vibrates to emit sound which is transmitted through the third sound outlet (205), and the fourth diaphragm (630) vibrates to emit sound which is transmitted through the fourth sound outlet (206). When the electronic device (1000) is in the sound leakage prevention mode, the first shell (100) and the second shell (200) are oppositely arranged in a first direction, the first direction is a thickness direction of the electronic device (1000), vibration directions of the first diaphragm (520) and the second diaphragm (530) are the same, vibration directions of the third diaphragm (620) and the fourth diaphragm (630) are the same, the vibration direction of the first diaphragm (520) is opposite to the vibration direction of the third diaphragm (620), a line connecting the second sound outlet (106), the third sound outlet (205) and the fourth sound outlet (206) is a first plane, the first sound outlet (105) is located outside the first plane, a line connecting the first sound outlet (105) and the second sound outlet (106) is a third line (L3), a line connecting the third sound outlet (205) and the fourth sound outlet (206) is a fourth line (L4), and the third line (L3) and the fourth line (L4) are cross arranged.

15. The electronic device (1000) according to claim 14, characterized by, The first sound outlet (105) and the second sound outlet (106) are located at different heights.

16. The electronic device (1000) according to claim 14 or 15, characterized by, The first shell (100) comprises a first front surface (103), a first back surface (104) and a first top surface (102), the first front surface (103) and the first back surface (104) are oppositely arranged in the first direction, and the first top surface (102) is connected between the first front surface (103) and the first back surface (104). The second shell (200) comprises a second front surface (203), a second back surface (204) and a second top surface (202), the second front surface (203) and the second back surface (204) are oppositely arranged in the first direction, and the second top surface (202) is connected between the second front surface (203) and the second back surface (204). When the electronic device (1000) is in the sound leakage prevention mode, the first shell (100) and the second shell (200) are oppositely arranged in the first direction, the first front surface (103) faces the second front surface (203) of the second shell (200), and the first back surface (104) faces away from the second shell (200). The first sound outlet (105) is arranged on the first back surface (104), the second sound outlet (106) is arranged on the first top surface (102), and the third sound outlet (205) and the fourth sound outlet (206) are both arranged on the second top surface (202).

17. The electronic device (1000) according to claim 15 or 16, characterized by, The symmetry plane (S1) of the first shell (100) passes through the first sound outlet (105) and the second sound outlet (106), the symmetry plane (S1) of the first shell (100) is parallel to the bending axis direction of the electronic device (1000) and parallel to the first direction.

18. The electronic device (1000) according to any one of claims 15-17, characterized by, The first shell (100) and the second shell (200) are relatively unfolded when the electronic device (1000) is in an open state, the first shell (100) and the second shell (200) are arranged side by side along a second direction, and the first direction and the second direction are arranged at an included angle. An included angle between the fourth connecting line (L4) and the second direction is an acute angle, or the fourth connecting line (L4) is parallel to the second direction.

19. The electronic device (1000) according to any one of claims 14-18, characterized by, The third sound outlet (205) and the fourth sound outlet (206) are symmetrical about an axis (W2) of the second shell (200), and the axis (W2) of the second shell (200) is parallel to a bending axis direction of the electronic device (1000).

20. The electronic device (1000) according to any one of claims 14-19, characterized by, The first sound generating device (500) includes two single-diaphragm loudspeakers, and the first diaphragm (520) and the second diaphragm (530) are diaphragms of the two single-diaphragm loudspeakers, respectively. Alternatively, The first sound generating device (500) includes a double-diaphragm loudspeaker, and the first diaphragm (520) and the second diaphragm (530) are two diaphragms of the double-diaphragm loudspeaker.

21. The electronic device (1000) according to any one of claims 14-20, characterized by, The electronic device (1000) further includes a first driver and a second driver, the first driver is mounted on the first shell (100), and the second driver is mounted on the second shell (200). The first driver is configured to provide a first driving signal to vibrate the first diaphragm (520) and the second diaphragm (530), and the second driver is configured to provide a second driving signal to vibrate the third diaphragm (620) and the fourth diaphragm (630). When the electronic device (1000) is in a sound leakage prevention mode, the phase of the first driving signal is opposite to the phase of the second driving signal. When the electronic device (1000) is in an external playing mode, the phase of the first driving signal is the same as the phase of the second driving signal. 22.A control method for making a foldable electronic device (1000) produce sound, applied to the electronic device (1000) of any one of claims 14 to 20, and characterized in that, The electronic device (1000) further includes a first driver and a second driver, the first driver is mounted on the first shell (100), and the second driver is mounted on the second shell (200). The control method includes: Confirming a sound generating mode of the electronic device (1000), wherein the sound generating mode of the electronic device (1000) includes a sound leakage prevention mode and an external playing mode; When the electronic device (1000) is in a sound leakage prevention mode, the first driver provides a first driving signal to drive the first diaphragm (520) and the second diaphragm (530) to vibrate, and the second driver provides a second driving signal to drive the third diaphragm (620) and the fourth diaphragm (630) to vibrate, wherein the phase of the first driving signal is opposite to the phase of the second driving signal. When the electronic device (1000) is in the external mode, the first driver provides a first driving signal to drive the first diaphragm (520) and the second diaphragm (530) to vibrate, and the second driver provides a second driving signal to drive the third diaphragm (620) and the fourth diaphragm (630) to vibrate, wherein the phase of the first driving signal and the phase of the second driving signal are the same.

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