CN115767331A - Electronic device - Google Patents

Abstract

The embodiment of the application provides an electronic equipment, including center, display screen, speaker and piezoelectric film, the center includes medium plate and frame, and the frame encloses the edge of locating the medium plate, and the medium plate still is provided with the intercommunicating pore including first surface and the second surface that carry on the back mutually, and the intercommunicating pore runs through first surface and second surface. The display screen is installed in the frame to relative with the first surface of medium plate, form the clearance between display screen and the first surface, intercommunicating pore intercommunication clearance. The loudspeaker comprises a shell and a vibrating diaphragm, wherein the shell is arranged on the second surface of the middle plate and seals the communication hole, and the vibrating diaphragm is arranged on the shell and corresponds to the communication hole so that the gap serves as a front cavity of the loudspeaker. Piezoceramics pastes the surface of locating the display screen towards the medium plate. The electronic equipment that this application embodiment provided can guarantee good tone quality, has also reduced the trompil simultaneously.

Description

Electronic device

Technical Field

The application relates to the technical field of mobile terminals, in particular to an electronic device.

Background

In the related art, for an electronic device such as a mobile phone, an audio playing device such as a speaker and a receiver is usually installed, and the audio playing device is usually installed in a housing of the electronic device. In order to make the receiver generate sound, a sound hole is usually required to be formed in the side, provided with the display screen, of the casing, so that the size of the display screen is limited, and the problems of water resistance and dust resistance are also caused.

In the related art, some audio playing devices without holes appear, and such devices usually adopt a piezoelectric driving mode to drive a display screen to vibrate to realize sound production, but such audio playing devices have high cost and unstable tone quality.

Disclosure of Invention

It is an object of the present application to provide an electronic device to improve the above-mentioned problems.

The embodiment of the application provides an electronic equipment, including center, display screen, speaker and piezoelectric film, the center includes medium plate and frame, and the frame encloses the edge of locating the medium plate, and the medium plate still is provided with the intercommunicating pore including first surface and the second surface that carry on the back mutually, and the intercommunicating pore runs through first surface and second surface. The display screen is installed in the frame to relative with the first surface of medium plate, form the clearance between display screen and the first surface, intercommunicating pore intercommunication clearance. The loudspeaker comprises a shell and a vibrating diaphragm, wherein the shell is arranged on the second surface of the middle plate and seals the communication hole, and the vibrating diaphragm is arranged on the shell and corresponds to the communication hole so that the gap serves as a front cavity of the loudspeaker. The piezoelectric film is attached to the surface of the display screen facing the middle plate.

The electronic equipment that this application embodiment provided, through seting up the intercommunicating pore on the medium plate, the clearance intercommunication between intercommunicating pore and display screen and the medium plate, the vibrating diaphragm of speaker directly exposes and corresponds with the intercommunicating pore, when the speaker during operation, the preceding chamber of vibrating diaphragm can directly be regarded as in the clearance, during the vibrating diaphragm vibration, promote the air vibration in the clearance, and then drive the display screen vibration sound production, consequently need not trompil in display screen one side, the device cost is lower simultaneously, and can guarantee good tone quality. Meanwhile, the piezoelectric film is attached to the lower portion of the display screen and can drive the display screen to vibrate and sound through vibration. In some application scenes, the loudspeaker and the piezoelectric film can be mutually matched during working to form the mixture of high and low frequency sounds, so that better tone quality is realized, and meanwhile, in some application scenes, only one loudspeaker can be used, so that the privacy protection is improved.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

Fig. 2 is a schematic internal structure diagram of an electronic device according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a partially disassembled structure of an electronic device according to an embodiment of the present application.

Fig. 4 is a cross-sectional view of an electronic device provided in fig. 3.

Fig. 5 is a schematic view of an installation structure of a speaker according to an embodiment of the present application.

Fig. 6 is a schematic view of an installation structure of another speaker according to an embodiment of the present application.

Fig. 7 is a schematic view of a mounting structure of another speaker according to an embodiment of the present application.

Fig. 8 is a schematic view of a mounting structure of still another speaker according to an embodiment of the present application.

Fig. 9 is a partially disassembled structural schematic diagram of another electronic device provided in an embodiment of the present application.

Fig. 10 is a cross-sectional view of an electronic device provided in fig. 9.

Fig. 11 is a logic block diagram of a speaker according to an embodiment of the present application.

Fig. 12 is a schematic partial-split structure diagram of another electronic device according to an embodiment of the present application.

Fig. 13 is a cross-sectional view of one of the electronic devices shown in fig. 12.

Fig. 14 is a partially disassembled structural diagram of another electronic device provided in an embodiment of the present application.

Fig. 15 is a cross-sectional view of one of the electronic devices shown in fig. 14.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

At present, in a piezoelectric film sounding structure in the related art, a piezoelectric film is usually attached below a display screen, multiple layers of piezoelectric materials are generally required to be stacked, and the driving peak voltage is also required to be high, so that the overall cost is high; in addition, since the piezoelectric film has frequency-domain impedance characteristics, its sound quality at low frequencies is poor, and even under very high voltage driving, it is far from the traditional moving coil loudspeaker. Moving coil loudspeaker (speaker) has a shell usually, and inside sets up the vibrating diaphragm, and the both sides of vibrating diaphragm form antechamber and back chamber respectively, and antechamber and back chamber are located the both sides of the carrying on the back of the body of vibrating diaphragm respectively, and at moving coil loudspeaker during operation, the vibrating diaphragm vibrates in antechamber and back chamber, forms the audio frequency, and the rethread sets up the sound hole sound on the shell. The moving coil loudspeaker has low price and stable tone quality in medium and low frequency bands.

Based on this, the inventors of the present application have proposed the electronic apparatus 100 of the embodiments of the present application in order to improve the above-mentioned drawbacks. Embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the present embodiment provides an electronic device 100, and the electronic device 100 provided in the present embodiment is described by taking a mobile phone as an example, and referring to fig. 1 and fig. 2 together, the electronic device 100 includes a housing 110, a display screen 120, a main board 130, a battery 140, a speaker 200 (shown in fig. 3), a piezoelectric film 300, and the like. The main board 130 and the battery 140 are disposed in the housing 110, and the main board 130 is electrically connected to the battery 140, the speaker 200 and the piezoelectric film 300, so that the speaker 200 and the piezoelectric film 300 can obtain electric energy from the battery 140 and operate. The electronic device 100 has a length direction X along which a user can hold the electronic device 100 in a straight screen. Referring to fig. 1 again, the electronic device 100 may further include a front camera 170 and a microphone 180, and in one embodiment, the front camera 170 and the microphone 180 may be disposed at two ends of the electronic device 100 along the length direction X.

Referring to fig. 3, the housing 110 includes a middle frame 111 and a rear cover 113, the middle frame 111 includes a middle plate 1111 and a side frame 1112, the side frame 1112 is disposed around an edge of the middle plate 1111, the side frame 1112 protrudes from the middle plate 1111, and the side frame 1112 protrudes from the middle plate 1111 at two opposite sides of the middle plate 1111. Rear cover 113 is assembled on one side of middle plate 1111, and rear cover 113 is fixed with the assembly of frame 1112, and rear cover 113 forms with center 111 jointly and holds chamber 102, holds and to supply to set up all kinds of components and parts such as mainboard 130, battery 140, microphone 180 in the chamber 102. Bezel 1112 has opposing inner and outer surfaces, the outer surface being exposed as part of the exterior of electronic device 100, the inner surface facing cavity 102, the inner and outer surfaces being substantially parallel to each other.

The middle plate 1111 has a substantially plate-shaped structure, and the middle plate 1111 has a longitudinal direction, and it is understood that the longitudinal direction of the middle plate 1111 coincides with the longitudinal direction X of the electronic apparatus 100.

Referring to fig. 3 and 4, the middle plate 1111 has a first surface 1114 and a second surface 1115, the first surface 1114 and the second surface 1115 are disposed opposite to each other, the first surface 1114 faces the display 120, the second surface 1115 faces the rear cover, the middle plate 1111 is provided with a communication hole 1113, the communication hole 1113 penetrates through the first surface 1114 and the second surface 1115, and an axial direction of the communication hole 1113 may be substantially perpendicular to the first surface 1114 and the second surface 1115, which is not limited herein. The communicating hole 1113 may be opened at a position adjacent to one end of the middle plate 1111 in the longitudinal direction, for example, adjacent to the end of the electronic device 100 where the front camera 170 is disposed. The distance between the opening position of the communication hole 1113 and the frame 1112 may be 1-10mm, which is not limited herein. Of course, in some other embodiments, the communication hole 1113 may be opened at other positions of the electronic apparatus 100. The communication hole 1113 may be a circular hole, a square hole or another hole, which is not limited herein, and it is only necessary to ensure that the shape and structure of the communication hole 1113 substantially match the shape and structure of the speaker 180.

The display 120 is mounted on the bezel 1112, the display 120 faces the first surface 1114 of the middle plate 1111, a gap 121 is formed between the surface of the display 120 facing the middle plate 1111 and the first surface 1114 of the display 120, the gap 121 is filled with air, and the communication hole 1113 is communicated with the gap 121. The too wide width of the gap 121 may increase the thickness of the electronic device 100, which is not favorable for the electronic device 100 to be light and thin; the width of the gap 121 is too small, which in turn limits the operation of the speaker after subsequent mounting of the speaker. Illustratively, the width of the gap 121 may be, for example, 0.18mm to 0.22mm, that is, the distance between the first surface 1114 and the display screen 120 is 0.18mm to 0.22mm, and of course, the width of the gap 121 may be other values, which is not limited herein.

The Display screen 120 may be an LCD (Liquid Crystal Display) screen for displaying information, and the LCD screen may be a TFT (Thin Film Transistor) screen, an IPS (In-Plane Switching) screen, or an SLCD (split Liquid Crystal Display) screen. In other embodiments, the display screen 120 may adopt an OLED (Organic Light-Emitting Diode) screen for displaying information, and the OLED screen may be an AMOLED (Active Matrix Organic Light-Emitting Diode) screen or a Super AMOLED (Super Active Matrix Organic Light-Emitting Diode) screen or a Super AMOLED Plus (Super Active Matrix Organic Light-Emitting Diode Plus, magic screen), which will not be described herein again.

The battery 140 and the main board 130 are disposed in the accommodating cavity 102, supported by the middle plate 1111, and covered by the rear cover 113 to form protection. The battery 140 is electrically connected to the motherboard 130 to control the battery 140 to supply power to other functional elements or obtain information such as electric quantity of the battery 140.

With reference to fig. 4, the speaker 200 is disposed on the middle plate 1111, and specifically, the speaker 200 includes a housing 210 and a diaphragm 220, the diaphragm 220 is disposed on the housing 210 and exposed from the housing 210, i.e., the diaphragm 220 is partially open and is not completely enclosed by the housing 210. Referring to fig. 4 and 5, the housing 210 includes a side shell 212 and a bottom shell 211, the side shell 212 is connected to an edge of the bottom shell 211, the side shell 212 and the bottom shell 211 surround a cavity, the diaphragm 220 is mounted on the side shell 212 and partially exposed out of the housing 210, a back cavity 230 is formed between the diaphragm 220 and the bottom shell 211, the back cavity 230 can be used as a part of a working space when the diaphragm 220 works, and the diaphragm 220 can deform toward the back cavity 230 when vibrating. The side case 212 is installed on the middle plate 1111 and seals the communication hole 1113, such that the space formed by the communication hole 1113 and the gap 121 is a closed space, and the diaphragm 220 corresponds to the communication hole 1113, at this time, since the diaphragm 220 is open relative to the housing 210, the gap 121 can be used as a front cavity of the diaphragm 220, and when the diaphragm 220 vibrates toward the gap 121, the air filled in the gap 121 vibrates to drive the display 120 to vibrate, thereby generating sound. This embodiment eliminates the need to form holes in the display 120 side of the housing 210 and also eliminates the need to form holes in the display 120, thereby ensuring the uniformity of the appearance of the electronic device 100 on the side where the display 120 is disposed.

When the speaker 200 is in a non-operating state, please refer to fig. 5 again, the diaphragm 220 may be kept flush with the second surface 1115, and at this time, the diaphragm 220 may use the communication hole 1113 and the gap 121 as a front cavity during operation, which is advantageous in that, because the aperture of the communication hole 1113 is small, when the diaphragm 220 vibrates towards the front cavity, the air in the communication hole 1113 is driven by vibration and has a large amplitude, and when the vibration energy is transmitted into the gap 121, the time for the vibration to propagate in the plane direction of the display screen 120 in the whole gap 121 is more abundant, so that the vibration energy driving the display screen 120 to vibrate is distributed more uniformly at each point of the display screen 120, and the formed tone quality balance is better in the process of the display screen 120 vibrating and sounding.

As shown in fig. 6, when the speaker 200 is in a non-operating state, the diaphragm 220 may also be flush with the first surface 1114, and at this time, the diaphragm 220 is in an operating state, and the gap 121 serves as a front cavity, which is advantageous in that the vibration of the diaphragm 220 may be directly transmitted into the gap 121, the loss of the vibration energy is small, and when the vibration is transmitted in the whole gap 121 along the plane direction of the display screen 120, the vibration is still maintained at a large vibration capability when the vibration is transmitted to the display screen 120, so that the vibration energy driving the display screen 120 to vibrate is larger, and the loudness is improved. For a moving coil loudspeaker 200 that has insufficient loudness in the mid-to-high frequency band, the loudness of the loudspeaker 200 in the mid-to-high frequency band may be increased by increasing the vibration energy by providing the diaphragm 220 in a form that is flush with the first surface 1114.

In another embodiment, referring to fig. 7, when the speaker 200 is in a non-operating state, the diaphragm 220 may also be located in the communication hole 1113, and at this time, the speaker 200 may ensure a better loudness, and the display screen 120 may have a better tone quality balance during the vibration sound production process. It is understood that in other embodiments, the diaphragm 220 may be located in the gap 121 when the speaker 200 is in the non-operating state, and is not limited in this respect.

The side shell 212 may be directly disposed on the second surface 1115 of the middle plate 1111 by bonding, so as to ensure that the diaphragm 220 may correspond to the communication hole 1113, at this time, the aperture of the communication hole 1113 may be slightly smaller than the outer diameter of the side shell 212, and the side shell 212 may close the communication hole 1113 after being connected to the second surface 1115, so that when the diaphragm 220 vibrates towards the front cavity, vibration energy may not be lost towards the accommodating cavity. The side casing 212 may be integrated with the middle plate 1111 by injection molding, so as to fix the position of the speaker 200 and prevent the speaker 200 from being displaced due to vibration during the operation of the speaker 200. In another embodiment, the hole diameter of the communication hole 1113 may be slightly larger than the size of the speaker 200, and the side case 212 is inserted into the communication hole 1113 and fixedly coupled to the middle plate 1111, for example, by being fixed to the middle plate 1111 by bonding or by being fixed to the middle plate 1111 by interference fit. In addition, the side shell 212 and the hole wall enclosing the communication hole 1113 can be sealed by glue, foam and the like, so that the gap 121 forms a closed cavity, and the vibration sounding effect is improved.

In another embodiment, referring to fig. 8, the second surface 1115 is provided with a mounting groove 1116, the outer diameter of the mounting groove 1116 may be slightly larger than the outer diameter of the housing 210, the communication hole 1113 is located in the mounting groove 1116, the side shell 212 is at least partially embedded in the mounting groove 1116 and connected to the middle plate 1111 to be fixed, and the diaphragm 220 corresponds to the communication hole 1113. The benefits of this embodiment are: the distance between the speaker 200 and the display screen 120 can be reduced, so that the thickness of the electronic device 100 is reduced, and the loudness of the speaker 200 is increased.

The piezoelectric film 300 is a piezoelectric film, and changes the state of the crystal inside the piezoelectric film 22 by using the alternating voltage applied to the piezoelectric film, so that the piezoelectric film will deform, and when the piezoelectric film is stretched, the piezoelectric film bends upwards, and when the piezoelectric film is contracted, the piezoelectric film bends downwards, and then generates vibration and repeatedly pushes the display screen 120 to make a sound. In particular, in the present embodiment, the piezoelectric film 300 converts an electrical signal into mechanical vibration upon receiving the electrical signal. The piezoelectric film 300 is disposed at any position of the display screen 120, the piezoelectric film 300 is attached below the display screen 120, and when the piezoelectric film 300 does not work, the piezoelectric film 300 is located between the display screen 120 and the middle plate 1111, and when the piezoelectric film 300 vibrates, the piezoelectric film can drive the display screen 120 to vibrate so as to sound.

In this embodiment, referring to fig. 3 and fig. 4 again, the speaker is disposed at one end of the middle plate 1111 in the length direction, the piezoelectric film 300 is adjacent to the other end of the middle plate 1111 in the length direction, the piezoelectric film 300 and the speaker 200 may be staggered from each other, the area of the display screen 120 covered by the piezoelectric film 300 may be, for example, less than or equal to 50% of the area of the display screen 120, and the speaker and the piezoelectric film 300 are disposed at two ends of the electronic device 100 in the length direction. The speaker 200 may be disposed at the top of the electronic apparatus 100, the piezoelectric film 300 may be disposed at the bottom of the electronic apparatus 100, the top and the bottom refer to two ends of the electronic apparatus 100 in the length direction, and generally, in the process of using the electronic apparatus 100 by a user, the top is located above, and the bottom is located below, and the top of the electronic apparatus 100 may further be disposed with components such as a front camera, that is, the speaker 200 and the front camera are located at the same end of the electronic apparatus 100 in the length direction.

In order to enhance the heat dissipation of the display 120, a graphite layer 400 may be further disposed on a surface of the display 120 facing the middle plate 1111, the graphite layer 400 is attached to the display 120 and is located in a region of the display 120 other than the region where the piezoelectric film 300 is disposed, and in some embodiments, the graphite layer 400 may be disposed coplanar with the piezoelectric film 300.

In another embodiment, referring to fig. 9 and 10, the graphite layer 400 may be completely eliminated, and the coverage area of the piezoelectric film 300 may be increased to more than 90% of the area of the display screen 120, so as to significantly increase the sound volume and quality of the sound generated by the display screen 120 when the piezoelectric film 300 vibrates. In addition, the speaker 200 may be opposite to the piezoelectric film 300, and when the speaker 200 generates sound and only one of the speakers 200 is operating, vibration energy may be transmitted to the piezoelectric film 300, and transmitted to the display 120 after vibration of the piezoelectric film 300, so that sound quality may be filtered and enhanced, and sound volume may be reduced and privacy may be improved. Of course, the ratio of the area of the piezoelectric film 300 in the display screen 120 may be other values, and is not limited herein.

In the electronic device 100 in this embodiment, a receiver is not required to be disposed, a hole is not required to be formed in one side of the display screen 120 of the housing 210, the gap 121 between the display screen 120 and the middle plate 1111 is used as a front cavity of the speaker 200, and the vibration of the diaphragm 220 drives the display screen 120 to vibrate and generate sound, so that the consistency of the appearance of the electronic device 100 is ensured, and the cost of the electronic device 100 is reduced. In order to further improve the effect of the user in an application scenario of using the electronic device 100 for a call, the speaker 200 may be disposed on the top of the electronic device 100, that is, on the top of the middle plate 1111, where the top of the electronic device 100 refers to the end of the electronic device 100 in the length direction and is adjacent to the frame. Of course, in some other embodiments, the speaker 200 may be disposed at any other position of the middle plate 1111, which is not limited by the embodiment.

It should be noted that the speaker 200 and the piezoelectric film 300 can play audio signals of high frequency, medium frequency or low frequency independently from each other, and are not limited herein. In this embodiment, referring to fig. 11, in order to improve the sound quality of the electronic device 100, the main board 130 is integrated with or provided with a control portion 131, a driving circuit 132, a first power amplifier 133 and a second power amplifier 134, the control portion 131 is electrically connected to the driving circuit 132, the first power amplifier 133 and the second power amplifier 134, the control portion 131 controls the first power amplifier 133 and the second power amplifier 134 to operate through the driving circuit 132, after performing analog-to-digital conversion on an audio signal, the control portion 131 sends the signal to the first power amplifier 133 and/or the second power amplifier 134 through the driving circuit 132, the first power amplifier 133 sends the signal to the speaker 200 after amplifying, and the signal is converted into an audio signal by the speaker 200, and the diaphragm 220 vibrates in the front cavity and the rear cavity 230 to drive the display screen to vibrate and generate sound. Or the amplified signal is sent to the piezoelectric film 300 through the second power amplifier 134, and the piezoelectric film 300 vibrates to generate sound. Specifically, the control unit 131 may be, for example, a micro control unit, a central processing unit, or the like. The driving circuit 132 may include a serial bus and an audio bus, the control portion 131 is electrically connected to the serial bus and the audio bus, when the control portion 131 receives the digital audio signal, the digital audio signal is output to the speaker 200 through the audio bus and the serial bus after analog-to-digital conversion and power amplification, and the diaphragm 220 of the speaker 200 vibrates to drive the display screen 120 to vibrate and generate sound.

In an application scenario, in the first audio playback mode, for example, the user needs to use the electronic device 100 to answer a call, a voice call, and the like, and at this time, the privacy of the call needs to be improved. The control unit 131 may control the operation of the first power amplifier 133 through the driving circuit 132. Specifically, after the control unit 131 performs analog-to-digital conversion on the audio signal, the signal is sent to the first power amplifier 133 through the driving circuit 132, the first power amplifier 133 amplifies the audio signal and sends the amplified audio signal to the speaker 200, and the amplified audio signal is converted into the audio signal by the speaker 200, and the diaphragm 220 vibrates in the front cavity and the rear cavity to drive the display screen to vibrate and generate sound.

In another application scenario, in the second audio playback mode, for example, when the user uses the electronic device 100 to play back, the control portion 131 may control the first power amplifier 133 and the second power amplifier 134 to operate through the driving circuit 132. Specifically, after the analog-to-digital conversion of the audio signal, the control unit 131 sends the medium-low frequency signal to the first power amplifier 133 through the driving circuit 132, sends the medium-high frequency signal to the second power amplifier 134, amplifies the medium-high frequency signal by the first power amplifier 133, sends the amplified medium-high frequency signal to the speaker 200, and converts the amplified medium-high frequency signal into the audio signal, namely, the vibration of the diaphragm 220 in the front cavity and the back cavity, so as to drive the display screen to vibrate and generate sound. The audio signal amplified by the second power amplifier 134 is sent to the piezoelectric film 300, and is vibrated by the piezoelectric film 300 to drive the display screen 120 to vibrate and sound. Thus, the medium and low frequency signals generated by the speaker 200 and the medium and high frequency signals generated by the piezoelectric film 300 are superimposed during propagation, covering the full frequency band, resulting in better external sound quality.

In another embodiment, referring to fig. 12 and 13 together, the speaker 200 may be disposed at the bottom of the electronic device 100, the piezoelectric film 300 may be disposed at the top of the electronic device 100, the top and the bottom refer to two ends of the electronic device 100 in the length direction, and in the process of using the electronic device 100 by a user, the top is located above and the bottom is located below, and the top of the electronic device 100 may further be disposed with components such as a front camera, that is, the piezoelectric film 300 and the front camera are located at the same end of the electronic device 100 in the length direction, and the speaker 200 and the front camera are located at the opposite end of the electronic device 100 in the length direction.

At this time, in an application scenario, in the first audio playback mode, for example, the user needs to answer a call, a voice call, and the like using the electronic device 100, and at this time, the privacy of the call needs to be improved. The control unit 131 may control the second power amplifier 134 to operate through the driving circuit 132. Specifically, after the audio signal is analog-to-digital converted by the control unit 131, the signal is sent to the second power amplifier 134 through the driving circuit 132, the second power amplifier 134 amplifies the signal and sends the amplified signal to the piezoelectric film 300, and the amplified signal is converted into the audio signal by the piezoelectric film 300, so that the piezoelectric film 300 vibrates to drive the display screen 120 to vibrate and generate sound.

In another application scenario, in the second audio playback mode, for example, when the user uses the electronic device 100 to play back, the control portion 131 may control the first power amplifier 133 and the second power amplifier 134 to operate through the driving circuit 132. Specifically, after the analog-to-digital conversion of the audio signal, the control unit 131 sends the medium-low frequency signal to the first power amplifier 133 through the driving circuit 132, sends the medium-high frequency signal to the second power amplifier 134, amplifies the medium-high frequency signal by the first power amplifier 133, sends the amplified medium-high frequency signal to the speaker 200, and converts the amplified medium-high frequency signal into the audio signal, namely, the vibration of the diaphragm 220 in the front cavity and the back cavity, so as to drive the display screen to vibrate and generate sound. The audio signal amplified by the second power amplifier 134 is sent to the piezoelectric film 300, and is vibrated by the piezoelectric film 300 to drive the display screen 120 to vibrate and sound. Thus, the medium and low frequency signals generated by the speaker 200 and the medium and high frequency signals generated by the piezoelectric film 300 are superimposed during propagation, covering the full frequency band, resulting in better external sound quality.

In another embodiment, referring to fig. 14 and fig. 15 together, the speaker 200 and the piezoelectric film 300 may be disposed at the same end of the electronic device 100 in the longitudinal direction X, for example, the speaker 200 and the piezoelectric film 300 are both located at the top of the electronic device 100, in this case, the speaker 200 and the piezoelectric film 300 may be opposite, that is, the projection of the piezoelectric film 300 on the middle plate 1111 covers the communication hole 1113, when the speaker 200 emits sound, and when only one of the speakers 200 works, vibration energy may be transmitted to the piezoelectric film 300, and transmitted to the display screen 120 after vibration of the piezoelectric film 300, so that filtering enhancement of sound quality and reduction of sound volume and privacy may be achieved.

Referring to fig. 11 again, in order to improve the sound quality of the electronic device 100, the main board 130 is integrated with or provided with a control portion 131, a driving circuit 132, a first power amplifier 133, and a second power amplifier 134, the control portion 131 is electrically connected to the driving circuit 132, the first power amplifier 133, and the second power amplifier 134, the control portion 131 controls the first power amplifier 133 and the second power amplifier 134 to operate through the driving circuit 132, the control portion 131 performs analog-to-digital conversion on an audio signal, sends the signal to the first power amplifier 133 and/or the second power amplifier 134 through the driving circuit 132, the first power amplifier 133 amplifies the signal and sends the signal to the speaker 200, and the signal is converted into an audio signal by the speaker 200, and the diaphragm 220 vibrates in the front cavity and the rear cavity 230 to drive the display screen to vibrate and generate sound. Or the amplified signal is sent to the piezoelectric film 300 through the second power amplifier 134, and the piezoelectric film 300 vibrates to drive the display screen 120 to vibrate and sound. Specifically, the control unit 131 may be, for example, a micro control unit, a central processing unit, or the like. The driving circuit 132 may include a serial bus and an audio bus, the control portion 131 is electrically connected to the serial bus and the audio bus, when the control portion 131 receives the digital audio signal, the digital audio signal is output to the speaker 200 through the audio bus and the serial bus after analog-to-digital conversion and power amplification, and the diaphragm 220 of the speaker 200 vibrates to drive the display screen 120 to vibrate and generate sound.

In an application scenario, in the first audio playing mode, for example, a user needs to use the electronic device 100 to answer a call, a voice call, and the like, at this time, the earphone mode may be entered, so as to improve privacy of the call. Specifically, the control unit 131 can control the operation of the first power amplifier 133 and the second power amplifier 134 by the driving circuit 132. Specifically, after the analog-to-digital conversion of the audio signal, the control unit 131 sends the medium-low frequency signal to the first power amplifier 133 through the driving circuit 132, sends the medium-high frequency signal to the second power amplifier 134, amplifies the medium-high frequency signal by the first power amplifier 133, sends the amplified medium-high frequency signal to the speaker 200, and converts the amplified medium-high frequency signal into the audio signal, namely, the vibration of the diaphragm 220 in the front cavity and the back cavity, so as to drive the display screen to vibrate and generate sound. The audio signal amplified by the second power amplifier 134 is sent to the piezoelectric film 300, and is vibrated by the piezoelectric film 300 to drive the display screen 120 to vibrate and sound. When the user uses the electronic device 100, the electronic device 100 is close to the ear, so that it is difficult for others relatively far away from the electronic device 100 to hear the medium and low frequency audio signal and the medium and high frequency audio signal at the same time, and the privacy protection of the electronic device 100 in use can be improved.

When a user needs to use the electronic device 100 to answer a call and a voice call in a relatively noisy environment, the vibration volume needs to be further increased, the super volume mode can be achieved by entering the super volume mode, and the super volume mode can increase the volume on the basis of a conventional earphone mode. At this time, the amplification factors of the first power amplifier 133 and the second power amplifier 134 can be further increased simultaneously, the first power amplifier 133 is amplified and then sent to the loudspeaker 200, and the loudspeaker 200 converts the amplified signals into the audio signals, namely, the diaphragm 220, which vibrates in the front cavity and the rear cavity to drive the display screen to vibrate and sound. The audio signal amplified by the second power amplifier 134 is sent to the piezoelectric film 300, and is vibrated by the piezoelectric film 300 to drive the display screen 120 to vibrate and sound. The user can further improve the vibration intensity and the volume by inputting a control instruction. For example: the user may trigger the super volume mode by pressing a "volume +" button of the electronic device. Of course, the super-volume mode may also be entered by operating on the display screen, which is not limited herein.

In one application scenario, in the second audio playback mode, when the user uses the electronic device 100 to perform playback, the control unit 131 may control the first power amplifier 133 and the second power amplifier 134 to operate through the driving circuit 132. Specifically, after the analog-to-digital conversion of the audio signal, the control unit 131 sends the middle-low frequency signal to the first power amplifier 133 through the driving circuit 132, sends the middle-high frequency signal to the second power amplifier 134, and sends the amplified middle-high frequency signal to the speaker 200 through the first power amplifier 133, and the audio signal is converted by the speaker 200 into the audio signal, such that the diaphragm 220 vibrates in the front cavity and the rear cavity to drive the display screen to vibrate and generate sound. The audio signal amplified by the second power amplifier 134 is sent to the piezoelectric film 300, and is vibrated by the piezoelectric film 300 to drive the display screen 120 to vibrate and sound. Thus, the medium and low frequency signals generated by the speaker 200 and the medium and high frequency signals generated by the piezoelectric film 300 are superimposed during propagation, covering the full frequency band, resulting in better external sound quality.

Of course, it is understood that in other application scenarios, the speaker 200 and the piezoelectric film 300 may also perform audio playing in other manners, and are not limited herein. It should be noted that, in this embodiment, the middle and low frequencies may refer to audio signals in the range of 40Hz to 160Hz, and the middle and high frequencies may refer to audio signals in the range of 160Hz to 2560 Hz.

Electronic device 100 in the present application may be a mobile phone or smart phone (e.g., an iPhone (TM) based, android (TM) based phone), a Portable gaming device (e.g., a Nintendo DS (TM), playStation Portable (TM), game Advance (TM), iPhone (TM)), a laptop, a PDA, a Portable Internet appliance, a music player and data storage device, other handheld devices and head-mounted devices such as a watch, an earphone, a pendant, an earphone, etc., and electronic device 10010 may also be other wearable devices (e.g., a head-mounted device (HMD) such as electronic glasses, electronic clothing, an electronic bracelet, an electronic necklace, an electronic tattoo, electronic device 100, or a smart watch).

The electronic device 100 may also be any of a plurality of electronic devices 100, the plurality of electronic devices 100 including, but not limited to, cellular telephones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controls, pagers, laptop computers, desktop computers, printers, netbook computers, personal Digital Assistants (PDAs), portable Multimedia Players (PMPs), moving Picture experts group (MPEG-1 or MPEG-2) Audio layer 3 (MP 3) players, portable medical devices, and digital cameras, and combinations thereof.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (14)

1. An electronic device, comprising:

the middle frame comprises a middle plate and a frame, the frame is arranged around the edge of the middle plate, the middle plate comprises a first surface and a second surface which are opposite to each other, a communication hole is formed in the first surface of the middle plate, and the communication hole penetrates through the first surface and the second surface;

the display screen is arranged on the frame and is opposite to the first surface of the middle plate, a gap is formed between the display screen and the first surface, and the communication hole is communicated with the gap;

the loudspeaker comprises a shell and a vibrating diaphragm, the shell is arranged on the second surface of the middle plate and seals the communication hole, and the vibrating diaphragm is arranged on the shell and corresponds to the communication hole so that the gap serves as a front cavity of the loudspeaker; and

the piezoelectric film is attached to the surface, facing the middle plate, of the display screen.

2. The electronic device according to claim 1, wherein the piezoelectric film covers an area of the display screen by 80% or more.

3. The electronic device of claim 1, wherein the middle plate has a length direction, the speaker is disposed at one end of the middle plate in the length direction, and the piezoelectric film is adjacent to the other end of the middle plate in the length direction.

4. The electronic device according to claim 2 or 3, further comprising a control portion electrically connected to the speaker and the piezoelectric film, wherein the control portion is configured to output an audio signal to the speaker in a first audio playback mode, and wherein the control portion is further configured to simultaneously output an audio signal to the speaker and the piezoelectric film in a second audio playback mode.

5. The electronic device according to claim 1 or 2, wherein the middle plate has a length direction, the speaker and the piezoelectric film are disposed at the same end of the middle plate in the length direction, and the piezoelectric film is opposite to the speaker.

6. The electronic apparatus according to claim 5, further comprising a control section electrically connected to the speaker and the piezoelectric film, the control section configured to output a medium-low frequency audio signal to the speaker and a medium-high frequency audio signal to the piezoelectric film.

7. The electronic device of claim 1, wherein the housing includes a side shell and a bottom shell, the side shell being connected to an edge of the bottom shell, the diaphragm being mounted to the side shell and exposing the housing, the diaphragm and the bottom shell forming a back cavity therebetween.

8. The electronic device according to claim 7, wherein said second surface is provided with a mounting groove, said communication hole is located in said mounting groove, and said side case is at least partially fitted into said mounting groove and connected to said middle plate.

9. The electronic device of claim 7, wherein the housing is coupled to the midplane by injection molding.

10. The electronic apparatus according to claim 7, wherein said side case is embedded in said communication hole and fixedly connected to said middle plate.

11. The electronic device of claim 7, wherein the diaphragm is flush with the second surface.

12. The electronic device of claim 7, wherein the diaphragm is located within the via.

13. The electronic device of claim 7, wherein the diaphragm is flush with the first surface.

14. The electronic device of claim 1, wherein a spacing between the first surface and the display screen is 0.18mm-0.22mm.

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