CN110609589A - Electronic equipment and control method thereof - Google Patents

Abstract

The embodiment of the application provides electronic equipment, which comprises a frame; the first piezoelectric ceramic module is arranged on the inner surface of the frame and used for transmitting sound signals; the second piezoelectric ceramic module is arranged on the inner surface of the frame and used for detecting fingerprint information; the processor is electrically connected with the first piezoelectric ceramic module and the second piezoelectric ceramic module respectively and used for controlling the first piezoelectric ceramic module to generate vibration so as to drive the frame at the position where the first piezoelectric ceramic module is arranged to generate vibration and send a sound signal; and/or the processor is used for controlling the first piezoelectric ceramic module to receive external sound signals; the processor is also used for acquiring fingerprint information detected by the second piezoelectric ceramic module on the frame, and carrying out fingerprint identification according to the fingerprint information. Thereby avoiding the need to open holes in the electronic device.

Description

Electronic equipment and control method thereof

technical field

The present application relates to the field of electronic technology, and in particular, to an electronic device and a control method thereof.

Background technique

With the development of electronic technology, electronic devices such as smart phones are used more and more frequently in the daily life of users. Among them, the more commonly used functions of electronic devices are an audio playback function and a fingerprint unlocking function. Both the audio playback function and the fingerprint unlocking function need to be implemented by opening holes on the electronic device.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an electronic device and a control method thereof, which can avoid opening holes on the electronic device.

The embodiment of the present application provides an electronic device, including:

frame;

a first piezoelectric ceramic module set on the inner surface of the frame, and the first piezoelectric ceramic module is used for transmitting sound signals;

The second piezoelectric ceramic module is disposed on the inner surface of the frame, and the second piezoelectric ceramic module is used for detecting fingerprint information; and

a processor, which is electrically connected to the first piezoelectric ceramic module and the second piezoelectric ceramic module, respectively;

The processor is used to control the first piezoelectric ceramic module to vibrate, so as to drive the frame of the set position of the first piezoelectric ceramic module to vibrate, and to send out a sound signal; and/or the processor is used to control The first piezoelectric ceramic module receives external sound signals;

The processor is further configured to acquire fingerprint information detected by the second piezoelectric ceramic module on the frame, and perform fingerprint identification according to the fingerprint information.

The embodiment of the present application also provides a control method for an electronic device, the electronic device includes:

frame;

a first piezoelectric ceramic module set on the inner surface of the frame, and the first piezoelectric ceramic module is used for transmitting sound signals;

The second piezoelectric ceramic module is arranged on the inner surface of the frame, and the second piezoelectric ceramic module is used for detecting fingerprint information;

The method includes:

receiving a first request, and transmitting a sound signal through the first piezoelectric ceramic module according to the first request;

receiving a second request, and detecting fingerprint information through the second piezoelectric ceramic module according to the second request;

The electronic device is controlled according to the sound signal and the fingerprint information.

In the electronic device provided by the embodiments of the present application, a first piezoelectric ceramic module and a second piezoelectric ceramic module are arranged on the inner surface of the frame, the first piezoelectric ceramic module is used for transmitting sound signals, and the second piezoelectric ceramic module is used for transmitting sound signals. Groups are used to detect fingerprint information to avoid opening holes in electronic devices.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic diagram of a first structure of an electronic device provided by an embodiment of the present application.

FIG. 2 is a first structural schematic diagram of a middle frame and a piezoelectric ceramic module of an electronic device provided by an embodiment of the present application.

FIG. 3 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of a second structure of a middle frame and a piezoelectric ceramic module of an electronic device according to an embodiment of the present application.

FIG. 5 is a third structural schematic diagram of a middle frame and a piezoelectric ceramic module of an electronic device provided by an embodiment of the present application.

6 is a schematic diagram of a fourth structure of a middle frame and a piezoelectric ceramic module of an electronic device provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of the first structure of the piezoelectric ceramic monomer shown in FIG. 4 .

FIG. 8 is a schematic structural diagram of the piezoelectric ceramic monomer shown in FIG. 4 in a first bending state.

FIG. 9 is a schematic structural diagram of the piezoelectric ceramic monomer shown in FIG. 4 in a second bending state.

FIG. 10 is a schematic diagram of the second structure of the piezoelectric ceramic monomer shown in FIG. 4 .

FIG. 11 is a schematic diagram of a fifth structure of a middle frame and a piezoelectric ceramic module of an electronic device provided by an embodiment of the present application.

FIG. 12 is a first schematic flowchart of a control method for an electronic device provided by an embodiment of the present application.

FIG. 13 is a second schematic flowchart of a control method for an electronic device provided by an embodiment of the present application.

Detailed ways

Embodiments of the present application provide an electronic device. The electronic device may be a smart phone, a tablet computer, etc., or a game device, an AR (Augmented Reality, augmented reality) device, a car device, a data storage device, an audio playback device, a video playback device, a notebook computer, and a desktop computing device. equipment, etc.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a first structure of an electronic device provided by an embodiment of the application; the electronic device 100 includes a middle frame 10, a circuit board 20, a first piezoelectric ceramic module 30 and a second piezoelectric ceramic module 40. The first piezoelectric ceramic module 30 and the second piezoelectric ceramic module 40 are both disposed on the middle frame 10 , and both the first piezoelectric ceramic module 30 and the second piezoelectric ceramic module 40 are electrically connected to the circuit board 20 . connect.

It should be noted that "first" and "second" in the embodiments of the present application are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features.

The middle frame 10 may be a thin plate-like or flake-like structure, and may also be a hollow frame structure. The middle frame 10 is used to provide support for electronic devices or functional components in the electronic device 100 , so as to mount the electronic devices and functional components of the electronic device 100 together. For example, the middle frame 10 may be provided with structures such as grooves, protrusions, through holes, etc., so as to facilitate the installation of electronic devices or functional components of the electronic device 100 . It can be understood that the material of the middle frame 10 may include metal or plastic.

Please refer to FIG. 2. FIG. 2 is a first structural schematic diagram of a middle frame and a piezoelectric ceramic module of an electronic device provided by an embodiment of the application; the middle frame 10 includes a frame arranged on the periphery of the middle frame 10, and the first piezoelectric ceramic The module 30 and the second piezoelectric ceramic module 40 are both arranged on the inner surface of the frame. By arranging the first piezoelectric ceramic module 30 and the second piezoelectric ceramic module 40 on the inner surface of the frame, the first The piezoelectric ceramic module 30 is used to transmit sound signals, and the second piezoelectric ceramic module 40 is used to detect fingerprint information, which can not only avoid opening holes on the electronic device 100, but also realize the piezoelectric ceramic module in the electronic device 100. multifunctional application.

It should be noted that the above-mentioned transmission of sound signals includes only receiving sound signals, only sending sound signals, and both receiving sound signals and sending sound signals.

The frame includes two oppositely arranged short frames 101 and two oppositely arranged long frames 102, the length of the long frames 102 is greater than the length of the short frames 101, and each of the short frames 101 is arranged on the two long frames Between 102, each short frame 101 and each long frame 102 are sequentially connected to form a frame.

The circuit board 20 is mounted on the middle frame 10 for fixing, and the circuit board 20 is sealed inside the electronic device 100 through the battery cover. The circuit board 20 may be the main board of the electronic device 100 . An audio processing circuit may be provided on the circuit board 20 , and the audio processing circuit is used for processing audio data, thereby generating a sound signal, and transmitting the generated sound signal to the outside of the electronic device 100 . In addition, the circuit board 20 may also integrate one or more functional components such as a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, and a motor.

Please refer to FIG. 3 , which is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application. The electronic device 100 further includes a processor 201 and a memory 202 , and the processor 201 and the memory 202 are provided on the above-mentioned circuit board 20 .

The processor 201 is used to control the first piezoelectric ceramic module 30 to vibrate, so as to drive the frame of the set position of the first piezoelectric ceramic module 30 to vibrate, and to send out a sound signal; and/or the processor 201 is used to control the first piezoelectric ceramic module 30 to receive external sound signals; the processor 201 is also used to obtain the fingerprint information detected by the second piezoelectric ceramic module 40 on the frame, and Fingerprint identification is performed according to the fingerprint information.

The processor 201 is the control center of the electronic device 100, uses various interfaces and lines to connect various parts of the entire electronic device 100, and executes by running or loading the computer program stored in the memory 202 and calling the data stored in the memory 202. Various functions of the electronic device 100 and processing data, so as to monitor the electronic device 100 as a whole.

The memory 202 can be used to store software programs and modules, and the processor 201 executes various functional applications and data processing by running the computer programs and modules stored in the memory 202 . The memory 202 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, a computer program required for at least one function, and the like; the storage data area may store data created according to the use of the electronic device, and the like. Additionally, memory 202 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, memory 202 may also include a memory controller to provide processor 201 access to memory 202 .

In addition, not shown in the figure, the electronic device 100 may further include a control circuit, the control circuit may include an audio control sub-circuit, and the audio control sub-circuit may be used to control whether the first piezoelectric ceramic module 30 vibrates, the vibration amplitude and the vibration frequency, The audio control sub-circuit can be electrically connected with the processor 201 and the first piezoelectric ceramic unit 30 , and the audio control sub-circuit can control the first piezoelectric ceramic unit 30 by controlling the vibration state of the first piezoelectric ceramic unit 30 Whether to make a sound, the volume of the sound and the tone, etc., the audio sub-control circuit may include a filter or a power amplifier.

Please refer to FIG. 4. FIG. 4 is a schematic diagram of a second structure of a middle frame of an electronic device and a piezoelectric ceramic module according to an embodiment of the present application; the first piezoelectric ceramic module 30 includes at least one piezoelectric ceramic monomer such as the first piezoelectric ceramic module. A piezoelectric ceramic unit 301, the processor 201 is configured to control the at least one first piezoelectric ceramic unit 301 to receive a sound signal in a first time period, and the processor 201 is further configured to control the at least one first piezoelectric ceramic unit 301 The piezoelectric ceramic unit 301 emits a sound signal in the second time period, so as to realize the function of the first piezoelectric ceramic unit 301 not only sending a sound signal, but also receiving a sound signal.

When the first piezoelectric ceramic module 30 includes only one first piezoelectric ceramic unit 301, the first piezoelectric ceramic unit 301 can be disposed on the inner surface of the short frame 101 of the frame, so as to realize the first piezoelectric ceramic unit The body 301 receives the sound signal during the first time period and emits the sound signal during the second time period.

It can be understood that the first piezoelectric ceramic unit 301 can also be disposed on the inner surface of the long frame 102 , and the placement position of the first piezoelectric ceramic unit 301 on the frame is not limited, as long as the first piezoelectric ceramic unit can be realized The functions of 301 for transmitting sound signals are all within the scope of protection of the present application.

The above-mentioned first piezoelectric ceramic unit 301 is made of ceramic material. The first piezoelectric ceramic unit 301 can convert mechanical energy and electrical energy into each other. When the first piezoelectric ceramic unit 301 converts electrical energy into mechanical energy, the first piezoelectric ceramic unit 301 The electric ceramic monomer 301 can send out a sound signal, and the first piezoelectric ceramic monomer 301 can be used as an earpiece or a speaker of the electronic device 100 at this time; when the first piezoelectric ceramic monomer 301 converts mechanical energy into electrical energy, the first piezoelectric ceramic monomer 301 The ceramic monomer 301 can receive the sound signal, and at this time, the first piezoelectric ceramic monomer 301 can be used as a microphone of the electronic device 100 .

Please refer to FIG. 5 , which is a third schematic structural diagram of the middle frame and the piezoelectric ceramic module of the electronic device provided by the embodiment of the present application. It can be understood that, the first piezoelectric ceramic module 30 may include at least two first piezoelectric ceramic monomers 301, at least one first piezoelectric ceramic monomer 301 is used for receiving sound signals, and at least one of the first piezoelectric ceramic monomers 301 is used for receiving sound signals. The electric ceramic unit 301 is used to emit sound signals.

It can be understood that when the user uses the electronic device 100 to make a voice call, usually one end of the electronic device 100 is close to the lip for recording. 301 is arranged on the inner surface of one short frame 101 , and at least one first piezoelectric ceramic single body 301 is arranged on the inner surface of the other short frame 101 .

Please refer to FIG. 6 . FIG. 6 is a fourth schematic structural diagram of a middle frame and a piezoelectric ceramic module of an electronic device according to an embodiment of the present application. It can be understood that, when the number of the first piezoelectric ceramic units 301 is multiple, for example, six. Two first piezoelectric ceramic units 301 are disposed on the inner surface of each long frame 102 . The first piezoelectric ceramic unit 301 is disposed at the position of the long frame 102 close to the other short frame 101 , each short frame 101 is provided with a first piezoelectric ceramic unit 301 , and the first piezoelectric ceramic unit 301 of the long frame 102 For sending out sound signals, the first piezoelectric ceramic unit 301 of the end frame 101 is used for receiving sound signals, so that when the user uses the electronic device 100 to talk, the first piezoelectric ceramics of any short frame 101 of the electronic device 100 can be realized. The single unit 301 can receive sound signals, and any position of the long frame 102 of the electronic device 100 close to the short frame 101 can emit a sound signal, which is convenient for users to make voice and video calls under different postures of holding the electronic device 100 .

It can be understood that when the number of the first piezoelectric ceramic monomers 301 is multiple, the plurality of the first piezoelectric ceramic monomers 301 are used to send out sound signals, and the plurality of the first piezoelectric ceramic monomers 301 are used to emit sound signals. 301 are respectively disposed at different positions of the frame, so that a plurality of the first piezoelectric ceramic monomers 301 are used to generate sound signals of different channels.

It should be noted that, in the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

For example, when there are two first piezoelectric ceramic units 301, two first piezoelectric ceramic units 301 are used to send out sound signals, and one first piezoelectric ceramic unit 301 is disposed on the short frame 101 of the frame , another first piezoelectric ceramic unit 301 is arranged on the long frame 102 of the frame, so that the processor 201 controls the vibration of the two first piezoelectric ceramic units 301 to drive different parts of the frame to vibrate to generate sound signals, a On the one hand, it can strengthen the strength of the generated sound signal, and on the other hand, it can also create a stereo sound effect.

In order to further create a better stereo sound effect and improve user experience, the two first piezoelectric ceramic units 301 can be used to generate sound signals of different channels. For example, one of the first piezoelectric ceramic units 301 may be used to generate the sound signal of the left channel, and another of the first piezoelectric ceramic units 301 may be used to generate the sound signal of the right channel.

It can be understood that one first piezoelectric ceramic unit 301 can also be provided with a short frame 101, and the other first piezoelectric ceramic unit 301 can also be provided on another short frame 101, as long as two first pressure The electric ceramic monomer 301 generates sound signals of different channels, which are all within the protection scope of the embodiments of the present application.

When the number of the first piezoelectric ceramic monomers 301 is at least four, for example, four, six, eight, etc., the embodiment of the present application does not limit the number of the first piezoelectric ceramic monomers 301 . A plurality of the first piezoelectric ceramic monomers 301 are used for transmitting sound signals, at least one first piezoelectric ceramic monomer 301 is arranged on each of the short frames 101 , and at least one each of the long frames 102 is arranged. The first piezoelectric ceramic unit 301 is described.

For example, when each of the short frames 101 is provided with one first piezoelectric ceramic unit 301, and each of the long frames 102 is provided with one first piezoelectric ceramic unit 301, the short frame 101 and the long frame 102 The first piezoelectric ceramic monomers 301 above are both used for receiving sound signals in the first time period and sending out sound signals in the second time period.

The first piezoelectric ceramic unit 301 on the short frame 101 is used to receive the sound signal in the first time period, the first piezoelectric ceramic unit 301 on the long frame 102 is used to send out the sound signal at the first time, the short frame The first piezoelectric ceramic unit 301 on the frame 101 is used for sending out the sound signal in the second time period, and the first piezoelectric ceramic unit 301 on the long frame 102 is used for receiving the sound signal in the second time period.

It can be understood that when two first piezoelectric ceramic units 301 are provided on each of the short frames 101 , and when two first piezoelectric ceramic units 301 are provided on each of the long frames 102 , the short frame A first piezoelectric ceramic monomer 301 on the 101 is used for sending out sound signals, and the other first piezoelectric ceramic monomer 301 is used for receiving sound signals; a first piezoelectric ceramic monomer 301 on the long frame 102 is used for The sound signal is sent out, and the other first piezoelectric ceramic body 301 is used for receiving the sound signal.

The electronic device 100 includes a landscape mode, a portrait mode, a game mode and a video mode. The landscape mode is when the user holds the electronic device 100 with one hand or both hands, with respect to the left and right hands, the short frame 101 faces the left and right hands, and the vertical In the screen mode, when the user holds the electronic device 100 with one hand, the long frame 102 faces the left and right hand directions relative to the left hand and the right hand. The game mode is that the user holds the two short frames 101 of the electronic device 100 with both hands to perform frequent sliding and clicking game operations, and the video mode is the video playback when the user holds the short frames 101 of the electronic device 100 with one hand.

When the electronic device 100 is in the landscape mode, the processor controls the first piezoelectric ceramic unit 301 on at least one long frame 102 to transmit sound signals; when the electronic device 100 is in the portrait mode, the processor controls the at least one short frame 101 on the The first piezoelectric ceramic unit 301 transmits sound signals, so that it can be avoided that the first piezoelectric ceramic unit 301 on the frame is blocked by the user's posture of holding the electronic device 100, which affects the transmission of sound by the first piezoelectric ceramic unit 301 Signal.

When the electronic device 100 is in the landscape mode and the game mode, the processor controls the first piezoelectric ceramic unit 301 disposed on at least one long frame 102 to transmit sound signals, and controls the two short frames 101 to transmit sound signals. The first piezoelectric ceramic body 301 does not transmit sound signals. Not only can the user's posture of holding the electronic device 100 block the first piezoelectric ceramic unit 301 on the frame, which will affect the transmission of sound signals by the first piezoelectric ceramic unit 301, but also only control the setting on at least one long frame 102. The first piezoelectric ceramic unit 301 on the upper side transmits the sound signal, and the first piezoelectric ceramic unit 301 arranged on the two short frames 101 is controlled not to transmit the sound signal, which can save the power consumption of the electronic device 100 effect.

When the electronic device 100 is in landscape mode and video mode, and the user holds the electronic device 100 with one hand, the processor controls the first piezoelectric ceramic unit 301 disposed on at least one short frame 101 to transmit sound signals , and control the first piezoelectric ceramic monomers 301 disposed on the two long frames 102 not to transmit sound signals. Not only can the first piezoelectric ceramic unit 301 on the frame be blocked by the user's posture of holding the electronic device 100 , which affects the transmission of sound signals by the first piezoelectric ceramic unit 301 , but also the power consumption of the electronic device 100 can be saved.

Please refer to FIG. 7. FIG. 7 is a schematic diagram of the first structure of the piezoelectric ceramic unit in FIG. 4. The shape of the piezoelectric ceramic unit 301 may be a regular shape. For example, the first piezoelectric ceramic unit 301 may be a rectangular structure, Rounded rectangular structure, circular structure, etc. The first piezoelectric ceramic body 301 may have an irregular shape.

The first piezoelectric ceramic unit 301 may include a first piezoelectric ceramic sheet 3011 , a diaphragm 3012 and a second piezoelectric ceramic sheet 3013 that are stacked. The first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013 are conductors, which can be used to conduct current. Diaphragm 3012 is a non-conductor and cannot be used to conduct current.

The size of the diaphragm 3012 is larger than that of the first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013 . The diaphragm 3012 may include a first region and a second region, and the second region is disposed at the periphery of the first region. For example, the second area may be arranged around the periphery of the first area. Wherein, the first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013 are arranged in the first area, so that the second area is exposed.

The first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013 are respectively electrically connected to an AC power source such as the AC power source 200 for converting the electrical energy output by the AC power source 200 into mechanical energy. The alternating current 200 is used to output an alternating voltage, and the alternating current power 200 may include a first electrode 210 and a second electrode 220 with different potential values.

The first piezoelectric ceramic sheet 3011 has opposite first end faces and second end faces, wherein the first end face is the face away from the diaphragm 3012 , and the second end face is the face connected to the first region. The first end face is electrically connected to the first electrode 210 of the AC power source 200 , and the second end face is electrically connected to the second electrode 220 of the AC power source 200 .

The second piezoelectric ceramic sheet 3013 has an opposite third end face and a fourth end face, wherein the third end face is a face connected to the first region, and the fourth end face is a face away from the diaphragm 3012 . The third end face is electrically connected to the second electrode 220 of the AC power source 200 , and the fourth end face is electrically connected to the first electrode 210 of the AC power source 200 .

As shown in FIGS. 8 and 9 , FIG. 8 is a schematic structural diagram of the piezoelectric ceramic monomer shown in FIG. 4 in a first bending state, and FIG. 9 is a structural schematic diagram of the piezoelectric ceramic monomer shown in FIG. 4 in a second bending state .

The direction of the alternating voltage of the AC power source 200 can change with time along with the direction, and the piezoelectric ceramic monomer 301 can deform and move as the direction of the alternating voltage changes. The first piezoelectric ceramic monomer 301 The deforming motion of the air can make the surrounding air move, which makes the sound.

For example, as shown in FIG. 8 , when the alternating voltage direction of the AC power source 200 is output from the first electrode 210 and returns to the second electrode 220 , the first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013 are Under the action of the electric field, the polarization vectors of the original chaotic orientation are preferentially oriented along the direction of the electric field, and the direction of the applied electric field of the first piezoelectric ceramic sheet 3011 is opposite to that of the second piezoelectric ceramic sheet 3013. , the polarization direction of the first piezoelectric ceramic sheet 3011 is opposite to the polarization direction of the second piezoelectric ceramic sheet 3013, and the polarization direction of the first piezoelectric ceramic sheet 3011 is the same as the voltage direction of the AC power supply 200. The electric ceramic sheet 3011 is elongated, so that the first piezoelectric ceramic sheet 3011 is bent toward the direction of the diaphragm 3012; the polarization direction of the second piezoelectric ceramic sheet 3013 is opposite to the voltage direction of the AC power source 200, and the second piezoelectric ceramic sheet 3013 shortening, so that the second piezoelectric ceramic sheet 3013 is bent in the direction away from the diaphragm 3012, and the diaphragm 3012 is also deformed under the action of the first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013, so that the first piezoelectric ceramic sheet 3012 is also deformed. The ceramic body 301 exhibits a first bent state.

As shown in FIG. 9 , when the alternating voltage direction of the AC power source 200 is output from the second electrode 220 and returns to the first electrode 210 , the polarization direction of the first piezoelectric ceramic sheet 3011 is opposite to the voltage direction of the AC power source 200 . , the first piezoelectric ceramic sheet 3011 is shortened, so that the first piezoelectric ceramic sheet 3011 is bent in the direction away from the diaphragm 3012, and the second piezoelectric ceramic sheet 3013 is elongated, so that the second piezoelectric ceramic sheet 3013 faces the diaphragm 3012. When the direction is bent, the diaphragm 3012 is also deformed under the action of the first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013, so that the first piezoelectric ceramic monomer 301 exhibits a second bending state.

The electronic device 100 can control the alternating voltage of the AC power source 200 to switch the first piezoelectric ceramic body 301 between the first bending state and the second bending state, so as to control the deformation movement of the first piezoelectric ceramic body 301 .

Wherein, the deformation amplitude of the first piezoelectric ceramic monomer 301 may be associated with the voltage amplitude of the alternating voltage. For example, the deformation amplitude of the first piezoelectric ceramic monomer 301 may be proportional to the voltage amplitude of the alternating voltage. When the voltage amplitude of the alternating voltage of the AC power source 200 controlled by the electronic device 100 increases, the deformation amplitude of the first piezoelectric ceramic monomer 301 increases accordingly, which can drive stronger air fluctuations to form a larger volume. This in turn increases the loudness of the audio signal. Of course, the deformation amplitude of the first piezoelectric ceramic monomer 301 may also be inversely proportional to the voltage amplitude of the alternating voltage. At this time, the electronic device 100 can increase the first voltage by reducing the voltage amplitude of the alternating voltage. The deformation amplitude of the electric ceramic monomer 301 .

In this embodiment of the present application, by arranging the first piezoelectric ceramic sheet 3011 and the second piezoelectric ceramic sheet 3013 in the first area, the second area of the diaphragm 3012 is exposed, so that the first area is affected by the first piezoelectric ceramic sheet 3011 The deformation occurs with the force exerted by the second piezoelectric ceramic sheet 3013 , and the second region maintains the original state without external force, and the deformation amplitude of the diaphragm 3012 can be increased compared to the second region without exposure.

It should be noted that the first piezoelectric ceramic unit 301 may also only include the first piezoelectric ceramic sheet 3011 and the diaphragm 3012, and the first piezoelectric ceramic sheet 3011 can drive the diaphragm 3012 to deform. Of course, the piezoelectric ceramic unit 501 may also include multiple first piezoelectric ceramic sheets 3011 and/or multiple second piezoelectric ceramic sheets 3013 , and the first piezoelectric ceramic sheets 3011 may be as many as the second piezoelectric ceramic sheets 3013 It may be set according to the actual situation, which is not limited in this embodiment of the present application.

Please refer to FIG. 10. FIG. 10 and FIG. 4 are schematic diagrams of the second structure of the piezoelectric ceramic unit. The plurality of first piezoelectric ceramic units 301 can be directly fixed on the inner surface of the frame, and the fixing method can be by bonding. accomplish. For example, glue can be coated on the first end face of the first piezoelectric ceramic sheet 3011, and the first end face of the first piezoelectric ceramic sheet 3011 can be attached to the inner surface of the frame. A first gap 203 is left between the first end face of the first piezoelectric ceramic sheet 3011 and the inner surface of the frame, and the first gap 203 can provide a deformation space for the first piezoelectric ceramic single body 301, so that the first piezoelectric ceramic single The body 301 may be bent toward the inner surface of the frame, or may be bent away from the inner surface of the frame. In some embodiments, glue can be applied to the second area of the diaphragm 3012, the second area is bonded to the inner surface of the frame, and the first piezoelectric ceramic sheet 3011 is in contact with the inner surface of the frame, which can fix the piezoelectric The ceramic monomer 501 can make the first piezoelectric ceramic sheet 3011 bend freely, and only the two sides of the diaphragm 3012 can be fixed to increase the bending amplitude of the diaphragm 3012 when the diaphragm 3012 is acted by the piezoelectric ceramic sheet.

Please refer to FIG. 11 . FIG. 11 is a fifth structural schematic diagram of a middle frame and a piezoelectric ceramic module of an electronic device provided by an embodiment of the present application. The second piezoelectric ceramic module 40 includes a plurality of piezoelectric ceramic cells such as second piezoelectric ceramic cells 401 , and at least one second piezoelectric ceramic cell 401 is disposed on the inner surface of each of the long frame 102 , which is convenient for The detection of the fingerprint information is performed according to the different postures of the user holding the electronic device 100 .

It can be understood that, two second piezoelectric ceramic monomers 401 are arranged on each of the above-mentioned long frame 102, and the second piezoelectric ceramic monomers 401 are directly fixed on the inner surface of the long frame 102, and the fixing method can be by bonding. accomplish. When the user holds the electronic device 100 with the left hand, the left thumb can directly touch the frame of the setting position of the second piezoelectric ceramic unit 401 to realize the detection of the fingerprint information of the left hand by the second piezoelectric ceramic unit 401. When the user's right hand When holding the electronic device 100 , the left-hand fingerprint information can be detected by the second piezoelectric ceramic unit 401 by directly touching the frame of the setting position of the second piezoelectric ceramic unit 401 with the thumb of the right hand. When the user holds the electronic device 100 with the right hand and needs to detect the fingerprint information of the left hand, it is not necessary to move the electronic device 100 to the left hand for detection, so that the user experience is better.

Please continue to refer to FIG. 1 , the electronic device 100 further includes a display screen 50 , a battery cover, and a battery 60 .

The display screen 50 is installed on the middle frame 10 to form a display surface of the electronic device 100 for displaying images, texts and other information. The display screen 50 may include a liquid crystal display (Liquid Crystal Display, LCD) or an organic light-emitting diode (Organic Light-Emitting Diode, OLED) type display screen. The display screen 50 may also be a flexible screen, that is, the display screen 50 may be deformed.

It can be understood that the display screen 50 may include a display surface and a non-display surface opposite to the display surface. The display surface is the surface of the display screen 50 facing the user, that is, the surface of the display screen 50 visible to the user on the electronic device 100 . The non-display surface is the surface of the display screen 50 facing the interior of the electronic device 100 . Wherein, the display surface is used for displaying information.

It can be understood that a cover plate may also be provided on the display screen 50 to protect the display screen 50 and prevent the display screen 50 from being scratched or damaged by water. The cover plate may be a transparent glass cover plate, so that the user can observe the content displayed on the display screen 50 through the cover plate. It can be understood that the cover plate may be a glass cover plate made of sapphire.

The battery cover is connected to the middle frame 10 . For example, the battery cover can be attached to the middle frame 10 by an adhesive such as double-sided tape to realize the connection with the middle frame 10 . The battery cover is used to seal the electronic devices and functional components of the electronic device 100 together with the middle frame 10 and the display screen 50 inside the electronic device 100 to form a protective effect on the electronic devices and functional components of the electronic device 100 . It can be understood that the battery cover can be integrally formed. During the forming process of the battery cover, structures such as a rear camera mounting hole may be formed on the battery cover. It can be understood that the material of the battery cover may also include metal or plastic.

The battery 60 can be mounted on the middle frame 10 of the case for fixing, and the battery 60 is sealed inside the electronic device 100 through the battery cover. Meanwhile, the battery 60 is electrically connected to the circuit board 20 , so that the battery 60 can supply power to the electronic device 100 . Wherein, the circuit board 20 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 60 to the various electronic devices in the electronic device 100 .

The electronic device 100 provided in the embodiment of the present application includes a frame, a first piezoelectric ceramic module 30 disposed on the inner surface of the frame, the first piezoelectric ceramic module 30 is used for transmitting sound signals; the second piezoelectric ceramic module 40, arranged on the inner surface of the frame, the second piezoelectric ceramic module 40 is used for detecting fingerprint information; and the processor is electrically connected with the first piezoelectric ceramic module 30 and the second piezoelectric ceramic module 40, respectively, The processor is used to control the first piezoelectric ceramic module 30 to vibrate, so as to drive the frame at the set position of the first piezoelectric ceramic module 30 to vibrate, and to send out sound signals; and/or the processor is used to control the first piezoelectric ceramic module The group 30 receives external sound signals; the processor is further configured to acquire fingerprint information detected by the second piezoelectric ceramic module 40 on the side, and perform fingerprint identification according to the fingerprint information. Not only can the opening of the electronic device 100 be avoided, but also the multi-functional application of the piezoelectric ceramic module in the electronic device 100 can be realized.

Please refer to FIG. 12, FIG. 12 is a first schematic flowchart of the control method of the electronic device provided by the embodiment of the present application; the embodiment of the present application also provides a control method of the electronic device, which is used to solve the problem that in practical applications, when a user uses When using electronic equipment, there is a problem of blocking the sound hole and the sound pickup hole, thereby affecting the pronunciation and sound pickup effect.

Control methods for electronic equipment include:

S101: Receive a first request, and transmit a sound signal through the first piezoelectric ceramic module according to the first request.

The above-mentioned first request is that the electronic device receives touch information, or the electronic device receives incoming call information, or the electronic device receives playback information, voice transmission request information, and the like.

The above-mentioned transmitting the sound signal includes receiving the sound signal, sending the sound signal, and receiving the sound signal and sending the sound signal. For example, when the user uses the electronic device to play video, a sound signal is sent through the first piezoelectric ceramic module, and when the user uses the electronic device to send voice information or record, the first piezoelectric ceramic module receives the sound signal. When the user uses the electronic device to make a call, the first piezoelectric ceramic module receives and sends out sound signals.

S102, receiving a second request, and detecting fingerprint information through the second piezoelectric ceramic module according to the second request;

The above-mentioned second request is a request when the user unlocks the electronic device before using the electronic device, and the fingerprint information is detected by the second piezoelectric ceramic module according to the request.

S103, control the electronic device according to the sound signal and the fingerprint information.

Wherein, the first request includes a first sub-request and a second sub-request, and the step of receiving the first request and transmitting the sound signal through the first piezoelectric ceramic module according to the first request includes:

Receive the first sub-request, and generate vibration through the first piezoelectric ceramic module according to the first sub-request, so as to drive the frame of the set position of the first piezoelectric ceramic module to vibrate, and issue a sound signal;

A second sub-request is received, and an external sound signal is received through the first piezoelectric ceramic module according to the second sub-request.

Please refer to FIG. 13. FIG. 13 is a schematic flowchart of a second control method for an electronic device provided by an embodiment of the present application; it can be understood that, when the first request is received, the After the electric ceramic module transmits the sound signal, it includes:

S104: Detect the current state of the electronic device, where the current state includes a landscape screen state and a portrait screen state.

The current state of the electronic device is detected every preset time interval, and the preset time interval may be any time interval, for example: 30s, 1min, etc., which is not limited in this embodiment of the present application.

It can be understood that, when it is detected that the electronic device receives a touch operation, the current state of the electronic device is detected, and the detection frequency is reduced, thereby reducing the power consumption of the electronic device. When the electronic device is in the horizontal screen state, it can be inferred that the user's holding posture is to hold both ends of the long frame of the electronic device. At this time, the way the user holds the electronic device will block the piezoelectric ceramic monomer on the short frame. , affect the piezoelectric ceramic monomer on the short frame to transmit sound signals, and transmit the sound signal by controlling at least one piezoelectric ceramic monomer on the long frame. When controlling the piezoelectric ceramic monomer arranged on a long frame to transmit the sound signal, not only the transmission of the sound signal can be realized, but also the power consumption of the electronic device can be reduced.

In the specific implementation process of detecting the current state of the electronic device, the horizontal screen state and the vertical screen state of the electronic device may be detected by sensors such as a gravity sensor and a gyroscope.

S105, when the electronic device is in a horizontal screen state, acquire a current working state of the electronic device, where the working state includes a game state and a video state.

When it is determined that the electronic device is in landscape mode, the current working state of the electronic device is obtained, and whether the electronic device has a touch operation is detected. The touch operation includes a sliding operation and a clicking operation. For example, the duration is 3 min, 5 min, 10 min, etc., which is not limited in the embodiment of the present application, and it can be determined that the current working state of the electronic device is the game state. When the durations of the sliding operation and the clicking operation are both short, for example, the duration is not more than 1 min, the embodiment of the present application does not limit it, and it can be determined that the current working state of the electronic device is the video state.

S106, when the electronic device is in a game state, control the piezoelectric ceramic monomers arranged on at least one of the long frames to transmit sound signals, and control the piezoelectric ceramic monomers arranged on the two short frames to not transmit sound Signal.

The above game state is the game state in the horizontal screen state. The user holds the two short frames of the electronic device with both hands, so that the piezoelectric ceramic unit on the short frame is blocked, which affects the sound transmitted by the piezoelectric ceramic unit on the short frame. Signal, control the piezoelectric ceramic monomer arranged on at least one of the long frames to transmit sound signals, and control the piezoelectric ceramic monomers arranged on the two short frames not to transmit sound signals, which can not only reduce the short-term impact in the game mode. The piezoelectric ceramic monomer on the frame transmits the influence of the sound signal, and, moreover, can also reduce the power consumption of the electronic device.

S107, when the electronic device is in a video state and the user holds the electronic device with one hand, control the piezoelectric ceramic monomer disposed on at least one of the short frames to transmit a sound signal, and control the pressure of the two long frames Electroceramic monomers do not transmit acoustic signals.

The above video state is the video state in the horizontal screen state. When the user holds the short frame of the electronic device with one hand, it will affect the piezoelectric ceramic monomer on one of the short frames and the long frame to transmit sound signals, for example: holding with one hand For electronic devices, one of the short frames of the electronic device can be held by the left hand, or the long frame of the electronic device can be held. Therefore, by controlling at least one of the piezoelectric ceramic monomers disposed on the short frame to transmit sound signals, and controlling the piezoelectric ceramic monomers of the two long frames to not transmit sound signals, it is possible to reduce the amount of noise on the short frame in the game mode. Piezoelectric ceramic monomer transmits the effect of sound signals.

Wherein, when the electronic device is in a video state and the user holds the electronic device with one hand, the piezoelectric ceramic monomers arranged on at least one of the short frames are controlled to transmit sound signals, and the pressure of the two long frames is controlled. The steps in which the electric ceramic monomer does not transmit sound signals include:

The distance between a target short frame and an external object is detected, and the target short frame is one of the short frames of the electronic device.

The target short frame is one of the short frames of the electronic device. It can be understood that the target short frame may also be an end of the short frame of the electronic device that the user holds. The above-mentioned external object is the palm of the user, and it can be understood that the external object is not limited to the palm, but may also be the user's face, arm, or the like. By detecting the distance between the short frame of the target and the external object, it can be determined whether the piezoelectric ceramic module on the short side is currently blocked.

It is judged whether the distance is less than a preset distance.

The above preset distance is the distance stored in the electronic device in advance. For example, the preset distance is 1 cm. When the distance between the target short frame and the external object is 0.5 cm, it is less than the preset distance. When the distance is 1.5 cm, it is greater than the preset distance.

If the distance is less than the preset distance, control the piezoelectric ceramic monomers arranged on the target short frame and the two long frames not to transmit sound signals, and control the piezoelectric ceramics arranged on the other short frame Single unit transmits sound signal;

When the distance between the target short frame and the external object is less than the preset distance, it can be determined that the external object blocks the piezoelectric ceramic monomer on the target short frame, and the piezoelectric ceramic monomer disposed on the target short frame is controlled to not transmit sound signal, and control the piezoelectric ceramic monomer of the other short frame to transmit the sound signal. Therefore, the influence on the transmission of the sound signal caused by the outside object blocking the piezoelectric ceramic module with the short frame is avoided.

If the distance is not less than the preset distance, the piezoelectric ceramic monomers arranged on at least one of the short frames are controlled to transmit sound signals, and the piezoelectric ceramic monomers of the two long frames are controlled not to transmit sound signals .

When the distance between the target short frame and the external object is not less than the preset distance, it can be determined that the external object does not block the piezoelectric ceramic unit on the short side of the target, or the external object does not affect the piezoelectric ceramic unit on the target short frame When the sound signal is transmitted, the piezoelectric ceramic monomer arranged on any one of the short frames is controlled to transmit the sound signal, and the piezoelectric ceramic monomer arranged on the two long frames is controlled not to transmit the sound signal.

An embodiment of the present application further provides a storage medium, where a computer program is stored in the storage medium, and when the computer program runs on a computer, the computer enables the computer to execute the control method for an electronic device in any of the foregoing embodiments. For example: detect the current state of the electronic device, the current state includes a landscape state and a portrait state; when the electronic device is in a landscape state, control the transmission of the piezoelectric ceramic monomer arranged on at least one of the long frames sound signal; when the electronic device is in a vertical screen state, control the piezoelectric ceramic module arranged on at least one of the short frames to transmit the sound signal.

In this embodiment of the present application, the storage medium may be a magnetic disk, an optical disk, a read only memory (Read Only Memory, ROM), or a random access memory (Random Access Memory, RAM), or the like.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

It should be noted that, for the control method of the electronic device of the embodiment of the present application, ordinary testers in the art can understand that all or part of the process of realizing the control method of the electronic device of the embodiment of the present application can be controlled by a computer program. hardware, the computer program can be stored in a computer-readable storage medium, such as a memory of an electronic device, and executed by at least one processor in the electronic device, and the execution process can include, for example, sound Flow of an embodiment of the control method. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, or the like.

For the electronic device according to the embodiment of the present application, each functional module may be integrated in one processing chip, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk.

The electronic device and the control method thereof provided by the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described herein by using specific examples, and the descriptions of the above embodiments are only used to help the understanding of the present application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. To sum up, the content of this specification should not be construed as a limitation to the present application.

Claims (12)

1. An electronic device, comprising:

a frame;

the first piezoelectric ceramic module is arranged on the inner surface of the frame and used for transmitting sound signals;

the second piezoelectric ceramic module is arranged on the inner surface of the frame and used for detecting fingerprint information; and

the processor is electrically connected with the first piezoelectric ceramic module and the second piezoelectric ceramic module respectively;

the processor is used for controlling the first piezoelectric ceramic module to generate vibration so as to drive the frame at the position where the first piezoelectric ceramic module is arranged to generate vibration and send out a sound signal; and/or the processor is used for controlling the first piezoelectric ceramic module to receive external sound signals;

the processor is further used for acquiring fingerprint information detected by the frame of the second piezoelectric ceramic module, and performing fingerprint identification according to the fingerprint information.

2. The electronic device of claim 1, wherein the first piezo ceramic module comprises at least one piezo ceramic cell, and wherein the processor is configured to control the at least one piezo ceramic cell to receive an audio signal during a first time period, and wherein the processor is further configured to control the at least one piezo ceramic cell to emit an audio signal during a second time period.

3. The electronic device according to claim 1, wherein the first piezoelectric ceramic module comprises at least two piezoelectric ceramic units, at least one of the piezoelectric ceramic units is configured to receive an acoustic signal, and at least one of the piezoelectric ceramic units is configured to emit an acoustic signal.

4. The electronic device according to claim 3, wherein the bezel comprises two oppositely disposed long bezels and two oppositely disposed short bezels, the length of the short bezels is smaller than that of the long bezels, each short bezel is disposed between two long bezels, and one short bezel is disposed with at least one of the piezoelectric ceramic monomers for receiving sound signals; and at least one piezoelectric ceramic monomer is arranged on the other short frame and used for emitting sound signals.

5. The electronic device according to claim 1, wherein the first piezoelectric ceramic module comprises a plurality of piezoelectric ceramic single bodies for emitting sound signals, and the plurality of piezoelectric ceramic single bodies are respectively disposed at different positions of the frame, so that the plurality of piezoelectric ceramic single bodies are used for generating sound signals of different sound channels.

6. The electronic device according to claim 1, wherein the frame comprises two long frames and two short frames, the two long frames are disposed opposite to each other, the length of the short frames is less than that of the long frames, each short frame is disposed between the two long frames, the first piezoelectric ceramic module comprises at least four piezoelectric ceramic units, at least four piezoelectric ceramic units are used for transmitting sound signals, at least one piezoelectric ceramic unit is disposed in each short frame, and at least one piezoelectric ceramic unit is disposed in each long frame;

when the electronic equipment is in a transverse screen mode and a game mode, the processor controls the piezoelectric ceramic single bodies arranged on at least one long frame to transmit sound signals and controls the piezoelectric ceramic single bodies arranged on the two short frames not to transmit sound signals;

when the electronic equipment is in a horizontal screen mode and a video mode and a user holds the electronic equipment by one hand, the processor controls the piezoelectric ceramic single bodies arranged on at least one short frame to transmit sound signals and controls the piezoelectric ceramic single bodies arranged on two long frames not to transmit sound signals.

7. The electronic device of any of claims 2-6, wherein the single piezoelectric ceramic body comprises a first piezoelectric ceramic sheet, a diaphragm, and a second piezoelectric ceramic sheet, which are stacked, wherein the diaphragm comprises a first region and a second region, the second region is disposed at a periphery of the first region, and the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are disposed in the first region such that the second region is exposed.

8. The electronic device according to claim 7, further comprising an alternating current power source including a first electrode and a second electrode which are different in potential value;

the first piezoelectric ceramic piece comprises a first end face and a second end face which are opposite, the first end face is electrically connected with the first electrode, the second end face is connected with the first region of the diaphragm, and the second end face is electrically connected with the second electrode;

the second piezoelectric ceramic piece comprises a third end face and a fourth end face which are opposite, the third end face is connected with the first area of the diaphragm, the third end face is electrically connected with the second electrode, and the fourth end face is electrically connected with the first electrode.

9. The electronic device according to claim 1, wherein the frame includes two long frames and two short frames, the two long frames are opposite to each other, the length of the short frames is smaller than that of the long frames, each short frame is disposed between the two long frames, the second piezoelectric ceramic module includes a plurality of piezoelectric ceramic units, the plurality of piezoelectric ceramic units are used for detecting fingerprint information, and at least one piezoelectric ceramic unit is disposed in each long frame.

10. A method of controlling an electronic device, the electronic device comprising:

a frame;

the first piezoelectric ceramic module is arranged on the inner surface of the frame and used for transmitting sound signals;

the second piezoelectric ceramic module is arranged on the inner surface of the frame and used for detecting fingerprint information;

the method comprises the following steps:

receiving a first request, and transmitting a sound signal through the first piezoelectric ceramic module according to the first request;

receiving a second request, and detecting fingerprint information through the second piezoelectric ceramic module according to the second request;

and controlling the electronic equipment according to the sound signal and the fingerprint information.

11. The method according to claim 10, wherein the electronic apparatus comprises:

the frame comprises two long frames and two short frames, the two long frames are oppositely arranged, the length of each short frame is smaller than that of each long frame, and each short frame is positioned between the two long frames;

the first piezoelectric ceramic module comprises at least four piezoelectric ceramic monomers, the at least four piezoelectric ceramic monomers are used for transmitting sound signals, the inner surface of each long frame is provided with at least one piezoelectric ceramic monomer, and the inner surface of each short frame is provided with at least one piezoelectric ceramic monomer;

after the step of receiving the first request and transmitting the sound signal through the first piezoceramic module according to the first request, the method comprises the following steps:

detecting the current state of the electronic equipment, wherein the current state comprises a horizontal screen state and a vertical screen state;

when the electronic equipment is in a horizontal screen state, acquiring the current working state of the electronic equipment, wherein the working state comprises a game state and a video state;

when the electronic equipment is in a game state, controlling the piezoelectric ceramic single bodies arranged on at least one long frame to transmit sound signals, and controlling the piezoelectric ceramic single bodies arranged on the two short frames not to transmit sound signals;

when the electronic equipment is in a video state and a user holds the electronic equipment by one hand, the piezoelectric ceramic single bodies arranged on at least one short frame are controlled to transmit sound signals, and the piezoelectric ceramic single bodies of the two long frames are controlled not to transmit sound signals.

12. The method according to claim 11, wherein when the electronic device is in a video state and a user holds the electronic device with one hand, the step of controlling the piezoelectric ceramic single bodies disposed in at least one of the short frames to transmit the sound signal and controlling the piezoelectric ceramic single bodies of the two long frames not to transmit the sound signal comprises:

detecting the distance between a target short frame and an external object, wherein the target short frame is one of the short frames of the electronic equipment;

judging whether the distance is smaller than a preset distance;

if the distance is smaller than the preset distance, controlling the piezoelectric ceramic monomers arranged on the target short frame and the two long frames not to transmit sound signals, and controlling the piezoelectric ceramic monomers arranged on the other short frame to transmit sound signals;

if the distance is not smaller than the preset distance, controlling the piezoelectric ceramic single bodies arranged on at least one short frame to transmit sound signals, and controlling the piezoelectric ceramic single bodies arranged on two long frames not to transmit sound signals.