阅读说明：本技术 电子设备 (Electronic device ) 是由 严笔祥 于 2019-08-26 设计创作，主要内容包括：本申请实施例提供一种电子设备,包括：显示屏,所述显示屏包括非显示面；压电陶瓷单元,所述压电陶瓷单元与所述显示屏的非显示面连接,所述压电陶瓷单元用于在第一频率的音频电信号的驱动下产生振动,并带动所述显示屏振动以产生声音信号；扬声器,所述扬声器设置在所述显示屏的非显示面一侧,所述扬声器用于在第二频率的音频电信号的驱动下产生声音信号；其中,所述第二频率小于所述第一频率。所述电子设备可以通过压电陶瓷单元带动显示屏振动以产生较高频率的声音信号,并且还可以通过扬声器产生较低频率的声音信号,既可以保证电子设备的高音音效,又可以保证电子设备的低音音效,从而可以提高电子设备的发声效果。(an embodiment of the present application provides an electronic device, including: a display screen comprising a non-display surface; the piezoelectric ceramic unit is connected with the non-display surface of the display screen and is used for generating vibration under the driving of an audio electric signal with a first frequency and driving the display screen to vibrate to generate a sound signal; the loudspeaker is arranged on one side of the non-display surface of the display screen and is used for generating a sound signal under the driving of an audio electric signal of a second frequency; wherein the second frequency is less than the first frequency. Electronic equipment can drive the display screen vibration through piezoceramics unit in order to produce the sound signal of higher frequency to can also produce the sound signal of lower frequency through the speaker, both can guarantee electronic equipment's high pitch audio, can guarantee electronic equipment's bass audio again, thereby can improve electronic equipment's sound producing effect.)

1. an electronic device, comprising:

a display screen comprising a non-display surface;

The piezoelectric ceramic unit is connected with the non-display surface of the display screen and is used for generating vibration under the driving of an audio electric signal with a first frequency and driving the display screen to vibrate to generate a sound signal;

The loudspeaker is arranged on one side of the non-display surface of the display screen and is used for generating a sound signal under the driving of an audio electric signal of a second frequency; wherein

The second frequency is less than the first frequency.

2. The electronic device of claim 1, further comprising:

The side frame of the shell is provided with a sound guide hole;

The loudspeaker is arranged in the shell, and sound signals generated by the loudspeaker are transmitted to the outside through the sound guide hole.

3. The electronic device according to claim 2, wherein a sound guide channel is provided between the speaker and the sound guide hole of the housing, and a sound signal generated by the speaker is transmitted to the outside through the sound guide channel and the sound guide hole in this order.

4. the electronic device of claim 1, wherein:

the piezoelectric ceramic units comprise first piezoelectric ceramic units and second piezoelectric ceramic units which are arranged at intervals, and the first piezoelectric ceramic units and the second piezoelectric ceramic units are connected with the non-display surface of the display screen; wherein

The first piezoelectric ceramic unit and the second piezoelectric ceramic unit are used for generating sound signals of different sound channels.

5. The electronic device of claim 4, wherein:

The display screen comprises a first end and a second end which are opposite;

the first piezoelectric ceramic unit is connected with the non-display surface of the first end part of the display screen;

And the second piezoelectric ceramic unit is connected with the non-display surface of the second end part of the display screen.

6. The electronic device of claim 5, wherein:

The display screen further comprises a first side edge, and the first side edge is connected with the first end part and the second end part;

The distances between the first piezoelectric ceramic unit and the first side edge and the distances between the second piezoelectric ceramic unit and the first side edge are equal, and the distances are smaller than a preset distance.

7. The electronic device of claim 6, wherein:

The display screen further comprises a second side edge opposite to the first side edge, and the second side edge is connected with the first end part and the second end part;

The loudspeaker sets up the non-display surface one side of display screen second end, the loudspeaker with the distance on second side equals first piezoceramics unit with the distance on first side.

8. Electronic device according to claim 7, characterized in that the loudspeaker is adapted to produce a sound signal of mixed channels, the mixed channels comprising at least two channels.

9. the electronic device of any of claims 4-8, wherein the electronic device comprises a first sound emission mode and a second sound emission mode;

In the first sound generation mode, the first piezoelectric ceramic unit generates sound signals, and the second piezoelectric ceramic unit and the loudspeaker do not generate sound signals;

And under the second sound production mode, the first piezoelectric ceramic unit, the second piezoelectric ceramic unit and the loudspeaker all produce sound signals.

10. The electronic device of claim 9, wherein:

In the first sound generation mode, the audio electrical signal with the first frequency directly drives the first piezoelectric ceramic unit to vibrate so as to generate a sound signal;

Under the second sound production mode, the audio electric signal of the first frequency drives the first piezoelectric ceramic unit to vibrate to generate a sound signal after being subjected to power amplification by the first power amplifier, the audio electric signal of the first frequency drives the second piezoelectric ceramic unit to vibrate to generate a sound signal after being subjected to power amplification by the second power amplifier, and the audio electric signal of the second frequency drives the loudspeaker to generate a sound signal after being subjected to power amplification by the third power amplifier.

11. The electronic device according to any one of claims 1 to 7, wherein the first frequency is equal to or greater than 300Hz and less than 20kHz, and the second frequency is greater than 20Hz and less than 300 Hz.

12. The electronic device of claim 11, wherein a frequency separation circuit is disposed in the electronic device, and the frequency separation circuit is configured to separate the electrical audio signal of the first frequency and the electrical audio signal of the second frequency from the electrical audio signal.

Technical Field

the present application relates to the field of electronic technologies, and in particular, to an electronic device.

Background

With the development of electronic technology, electronic devices such as smartphones are used more and more frequently in the daily lives of users. The audio playing function of the electronic device is one of the most used functions of a user in the process of using the electronic device. For example, the audio playing function of the electronic device is used in the process of enjoying a movie, listening to music, playing a game, making a voice call or a video call, etc. by using the electronic device. Therefore, users have made higher demands on the sound production effect of the electronic device during audio playing.

Disclosure of Invention

The embodiment of the application provides an electronic equipment, can produce sound signal jointly through display screen and speaker to improve electronic equipment's vocal effect.

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

A display screen comprising a non-display surface;

The piezoelectric ceramic unit is connected with the non-display surface of the display screen and is used for generating vibration under the driving of an audio electric signal with a first frequency and driving the display screen to vibrate to generate a sound signal;

The loudspeaker is arranged on one side of the non-display surface of the display screen and is used for generating a sound signal under the driving of an audio electric signal of a second frequency; wherein

The second frequency is less than the first frequency.

In the electronic equipment that this application embodiment provided, can drive the display screen vibration through piezoceramics unit in order to produce the sound signal of higher frequency to can also produce the sound signal of lower frequency through the speaker, consequently can produce sound signal jointly through display screen and speaker, both can guarantee electronic equipment's high pitch audio, can guarantee electronic equipment's bass audio again, thereby can improve electronic equipment's vocal effect.

drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

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

FIG. 2 is a cross-sectional view of the electronic device shown in FIG. 1 taken along the direction P1-P1.

Fig. 3 is a side view of the electronic device shown in fig. 1.

Fig. 4 is a schematic diagram illustrating a positional relationship between a display screen and a piezoelectric ceramic unit in the electronic device shown in fig. 1.

Fig. 5 is a schematic diagram of a positional relationship between a display screen, a piezoelectric ceramic unit, and a speaker in the electronic device shown in fig. 1.

Fig. 6 is a schematic diagram of an audio processing circuit in the electronic device shown in fig. 1.

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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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.

The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure, and fig. 2 is a cross-sectional view of the electronic device 100 shown in fig. 1 along a direction P1-P1.

The electronic device 100 includes a display screen 10, a housing 20, a circuit board 30, a battery 40, a piezoelectric ceramic unit 50, and a speaker 60.

The display screen 10 is disposed on the casing 20 to form a display surface of the electronic device 100 for displaying images, texts, and other information. The Display screen 10 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen. The display screen 10 may also be a flexible screen, i.e. the display screen 10 may be deformable.

It will be appreciated that the display screen 10 may include a display surface and a non-display surface opposite the display surface. The display surface is a surface of the display screen 10 facing a user, i.e. a surface of the display screen 10 visible to a user on the electronic device 100. The non-display surface is a surface of the display screen 10 facing the inside of the electronic device 100. The display surface is used for displaying information, and the non-display surface does not display information.

It will be appreciated that a cover plate may also be provided over the display screen 10 to protect the display screen 10 from scratching or water damage. The cover plate may be a transparent glass cover plate, so that a user can observe contents displayed on the display screen 10 through the cover plate. It will be appreciated that the cover plate may be a glass cover plate of sapphire material.

The housing 20 is used to form an outer contour of the electronic apparatus 100 so as to accommodate electronic devices, functional components, and the like of the electronic apparatus 100, while forming a sealing and protecting function for the electronic devices and functional components inside the electronic apparatus. For example, the camera, the circuit board, and the vibration motor of the electronic device 100 may be disposed inside the housing 20. It will be appreciated that the housing 20 may include a center frame and a battery cover.

The middle frame may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame is used for providing a supporting function for the electronic devices or functional components in the electronic device 100 so as to mount the electronic devices or functional components of the electronic device 100 together. For example, the middle frame may be provided with a groove, a protrusion, a through hole, and the like, so as to facilitate mounting of the electronic device or the functional component of the electronic apparatus 100. It is understood that the material of the middle frame may include metal or plastic.

The battery cover is connected with the middle frame. For example, the battery cover may be attached to the center frame by an adhesive such as a double-sided tape to achieve connection with the center frame. The battery cover is used for sealing the electronic devices and functional components of the electronic device 100 inside the electronic device 100 together with the middle frame and the display screen 10, so as to protect the electronic devices and functional components of the electronic device 100. It will be appreciated that the battery cover may be integrally formed. In the molding process of the battery cover, a post-camera mounting hole and other structures can be formed on the battery cover. It is understood that the material of the battery cover may also include metal or plastic.

A circuit board 30 is disposed inside the housing 20. For example, the circuit board 30 may be mounted on a middle frame of the case 20 to be fixed, and the circuit board 30 is sealed inside the electronic device by a battery cover. The circuit board 30 may be a main board of the electronic device 100. The circuit board 30 may be provided thereon with an audio processing circuit for processing audio data to generate a sound signal and transmitting the generated sound signal to the outside of the electronic device. In addition, one or more of a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, a motor, and other functional components may be integrated on the circuit board 30. Meanwhile, the display screen 10 may be electrically connected to the circuit board 30 to control the display of the display screen 10 by a processor on the circuit board 30.

The battery 40 is disposed inside the case 20. For example, the battery 40 may be mounted on a middle frame of the case 20 to be fixed, and the battery 40 is sealed inside the electronic device by a battery cover. Meanwhile, the battery 40 is electrically connected to the circuit board 30 to enable the battery 40 to supply power to the electronic device 100. The circuit board 30 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to the various electronic devices in the electronic apparatus 100.

The piezo-ceramic unit 50 is disposed inside the case 20. The piezoelectric ceramic unit 50 is connected to the non-display surface of the display screen 10. For example, the piezoelectric ceramic unit 50 may be attached to the non-display surface of the display screen 10 by an adhesive such as a double-sided tape.

Wherein the piezoelectric ceramic unit 50 is made of piezoelectric ceramic. The piezoelectric ceramic unit 50 may include a whole piece of piezoelectric ceramic plate, or include a plurality of piezoelectric ceramic plates arranged at intervals, or include a plurality of piezoelectric ceramic particles, or may also include a chip made of piezoelectric ceramic.

It should be noted that piezoelectric ceramics are a kind of electronic ceramic materials having piezoelectric properties. The main component of the piezoelectric ceramic is a crystal grain having ferroelectricity. The piezoelectric ceramic is an aggregate of a plurality of ferroelectric crystal grains, the orientation of which is random, and thus the polarization vectors of the respective ferroelectric crystal grains are disoriented. When the piezoelectric ceramic is placed in an electric field, the polarization vectors of the ferroelectric crystal grains in the original disordered orientation are preferentially oriented along the direction of the electric field, and at the moment, the piezoelectric ceramic deforms, and the deformation direction corresponds to the direction of the electric field, so that the piezoelectric property is expressed, and the electric energy is converted into the mechanical energy. It can be understood that when the piezoelectric ceramic is placed in a high-frequency alternating electric field, the direction of the electric field is constantly changed, and thus the direction of deformation of the piezoelectric ceramic is constantly changed, so that the piezoelectric ceramic macroscopically appears as vibration. The frequency of the piezoelectric ceramic when it vibrates is the same as the frequency of the alternating electric field, that is, the frequency of the applied alternating current signal.

on the other hand, piezoelectric ceramics also have reverse piezoelectric characteristics. That is, when the piezoelectric ceramic is deformed by an external force, a potential difference may be generated on the piezoelectric ceramic and a current may be formed, thereby converting mechanical energy into electric energy. And the direction of the potential difference generated on the piezoelectric ceramic and the direction of the current formed correspond to the direction of deformation of the piezoelectric ceramic. It is understood that when the piezoelectric ceramic vibrates under an external force, an alternating electric field may be formed in the piezoelectric ceramic, thereby generating an alternating current signal. When an alternating current signal is generated in the piezoelectric ceramic, the frequency of the alternating current signal is the same as the vibration frequency of the piezoelectric ceramic.

it can be understood that, since the piezoelectric ceramic unit 50 is connected to the display screen 10, when the piezoelectric ceramic unit 50 generates vibration, the display screen 10 is driven to vibrate, so as to generate a sound signal. That is, the display screen 10 may be used as a sound generating device of the electronic device 100 by the vibration of the piezoelectric ceramic unit 50, for generating a sound signal and transmitting the sound signal to the outside.

in addition, it should be noted that, because the size of the display screen 10 is large and the rigidity of the display screen 10 is large, the display screen 10 has a good effect of generating a sound signal when vibrating at a high frequency, and has a poor effect of generating a sound signal when vibrating at a low frequency. That is, the display screen 10 is used to generate high-pitched sound, and the sound effect is good; and when used for producing bass, the sound effect is poor.

Therefore, the piezoelectric ceramic unit 50 can be driven by the audio electrical signal with a higher frequency to generate vibration and drive the display screen 10 to vibrate so as to generate a sound signal, and transmit the generated sound signal to the outside of the electronic device 100. Wherein the higher frequency is a first frequency.

In addition, it should be noted that, through experimental verification, when the vibration frequency of the display screen 10 is greater than or equal to 300Hz (hertz), the effect of generating the sound signal by the display screen 10 is better. And when the vibration frequency of the display screen 10 is less than 300Hz, the display screen 10 has a poor effect of generating the sound signal. Therefore, the first frequency may be a frequency of 300Hz or more.

Further, since the frequency range of the sound signal audible to the human ear is 20Hz to 20kHz, the first frequency may be a frequency less than 20 kHz. That is, the range of the first frequency is 300Hz or more and less than 20 kHz.

The speaker 60 is disposed inside the housing 20. Wherein, the loudspeaker 60 is arranged on the non-display surface side of the display screen 10. For example, the speaker 60 may be provided on a middle frame of the housing 20 to be fixed. For another example, the speaker 60 may also be disposed on the circuit board 30 of the electronic device 100.

The speaker 60 may be an electromagnetic acoustic-electric transducer. The speaker 60 may generate a magnetic field inside, and when an alternating current signal is applied to the speaker 60, the speaker 60 may generate a sound signal by vibration and transmit the generated sound signal to the outside of the electronic device 100.

It will be appreciated that the speaker 60 may cooperate with the display screen 10 to collectively form a sound generating system of the electronic device 100. Wherein, because the display screen 10 is driven by the piezoelectric ceramic unit 50 to generate high pitch and low pitch, the low pitch can be generated by the loudspeaker 60 to enhance the low pitch effect. That is, the speaker 60 may be used to generate a sound signal driven by an audio electric signal of a lower frequency and transmit the generated sound signal to the outside of the electronic apparatus 100. Wherein the lower frequency is a second frequency. It will be appreciated that the second frequency is less than the first frequency.

It can be understood that the speaker 60 can be used to generate a sound signal below 300Hz because the display screen 10 is less effective in generating a sound signal when the vibration frequency of the display screen 10 is less than 300 Hz. That is, the second frequency may be a frequency less than 300 Hz.

Further, since the frequency range of the sound signal audible to the human ear is 20Hz to 20kHz, the second frequency may be a frequency greater than 20 Hz. That is, the second frequency ranges from greater than 20Hz to less than 300 Hz.

Referring to fig. 3, fig. 3 is a side view of the electronic device 100 shown in fig. 1.

It is understood that since the speaker 60 is disposed inside the housing 20, when the speaker 60 generates the sound signal, the sound signal is generated inside the electronic device 100. In order to enable the user to hear the sound signal generated by the speaker 60, a sound guiding structure for transmitting the sound signal to the outside of the electronic device needs to be provided on the housing 20.

The housing 20 of the electronic device 100 includes a side frame 21. The side frame 21 may be a metal frame or a plastic frame. It is understood that the side frame 21 may be a side of the middle frame of the housing 20, or may be a side of the battery cover of the housing 20. The side frame 21 may be, for example, a left side frame, a right side frame, a top frame, a bottom frame, or the like of the housing 20.

The side frame 21 is provided with a sound guide hole 211. The sound guide hole 211 penetrates the side frame 21 from the inside of the housing 20. Alternatively, it is understood that the sound guide hole 211 is a through hole provided in the side frame 21. The sound guide hole 211 may have a circular shape, an oval shape, a square shape, a rectangular shape, or the like. It should be noted that the number of the sound guide holes 211 may be one, multiple, or an integral sound guide hole formed by combining multiple through holes.

Wherein the sound signal generated from the speaker 60 is transmitted to the outside of the electronic device 100 through the sound guide hole 211.

It should be noted that, because the display screen 10 is disposed on the housing 20, when the display screen 10 is driven by the piezoelectric ceramic unit 50 to vibrate to generate a sound signal, the generated sound signal can be directly transmitted to the outside of the electronic device 100 without being transmitted through the sound guide hole 211, and without separately providing a sound guide structure for the display screen 10.

It will be appreciated that since the speaker 60 is disposed within the housing 20, there is not necessarily direct contact between the speaker 60 and the side frame 21 of the housing 20.

Therefore, in order to allow the sound signal generated from the speaker 60 to be smoothly transmitted to the outside of the electronic device 100 through the sound guide hole 211, a sound guide channel may be provided between the speaker 60 and the sound guide hole 211 of the housing 20. The sound signal generated from the speaker 60 is transmitted to the outside through the sound guide passage and the sound guide hole 211 in sequence.

The sound guide channel can be, for example, a sound guide cavity, a sound guide tube, and the like. Alternatively, the sound guiding channel may also be a closed sound cavity formed between the speaker 60 and the sound guiding hole 211, and two ends of the sound cavity are respectively communicated with the speaker 60 and the sound guiding hole 211.

Note that it is not essential to provide the sound guide hole 211 in the side frame 21. The housing 20 of the electronic device 100 may further include an earphone interface, a charging cable interface, and the like. The earphone interface, the charging cable interface, and the like are all formed with an opening on the housing 20. When the sound guide hole 211 is not formed on the side frame 21 of the housing 20, the sound signal generated by the speaker 60 can be transmitted to the outside of the electronic device 100 through an opening formed by an earphone interface, a charging cable interface, or the like.

It can be understood that, when the sound signal generated by the speaker 60 is transmitted to the outside of the electronic device 100 through the opening formed by the earphone interface, the charging cable interface, and the like, the sound generating effect of the speaker 60 is poor because no dedicated sound guide hole is provided for the speaker 60. When the sound guide hole 211 is provided in the side frame 21 of the housing 20, the sound signal generated by the speaker 60 is guided to the outside of the electronic device through the sound guide hole 211, and thus a good sound emission effect can be obtained.

In the electronic device 100 provided by the embodiment of the application, the display screen 10 can be driven to vibrate through the piezoelectric ceramic unit 50 to generate a sound signal with a higher frequency, and a sound signal with a lower frequency can also be generated through the loudspeaker 60, so that the sound signal can be generated jointly through the display screen 10 and the loudspeaker 60, a high sound effect of the electronic device 100 can be ensured, a low sound effect of the electronic device 100 can be ensured, and a sound production effect of the electronic device 100 can be improved.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating a positional relationship between a display screen and a piezoelectric ceramic unit in the electronic device 100 shown in fig. 1.

The piezoelectric ceramic unit 50 includes a first piezoelectric ceramic unit 51 and a second piezoelectric ceramic unit 52 which are arranged at an interval. That is, the first piezoelectric ceramic unit 51 and the second piezoelectric ceramic unit 52 are disposed at different positions in the electronic device 100. The first piezoelectric ceramic unit 51 and the second piezoelectric ceramic unit 52 are both connected to the non-display surface of the display screen 10.

It can be understood that, because the first piezoelectric ceramic unit 51 and the second piezoelectric ceramic unit 52 are disposed at different positions in the electronic device 100, different portions of the display screen 10 can be driven by the first piezoelectric ceramic unit 51 and the second piezoelectric ceramic unit 52 to vibrate, so that sound signals can be generated by the different portions of the display screen 10 vibrating simultaneously. Therefore, on the one hand, the strength of the generated sound signal can be enhanced, and on the other hand, the sound production effect of stereo sound can be created.

It can be understood that, in order to further create better stereo sound effect to improve the user experience, the first piezo-ceramic unit 51 and the second piezo-ceramic unit 52 may be used to generate sound signals of different sound channels. For example, the first piezo element 51 may be used to generate a sound signal for a left channel, and the second piezo element 52 may be used to generate a sound signal for a right channel. Alternatively, the first piezo ceramic unit 51 may be used to generate a sound signal of a right channel, and the second piezo ceramic unit 52 may be used to generate a sound signal of a left channel.

It will be appreciated that the display screen 10 includes opposite first and second ends 11, 12. The first end 11 may be, for example, a top end of the display screen 10, and the second end 12 may be, for example, a bottom end of the display screen 10. It is understood that the top end is the end of the display screen 10 where the top is located and the bottom end is the end of the display screen 10 where the bottom is located during the use of the electronic device 100 by the user.

The first piezo ceramic unit 51 is connected to the non-display surface of the first end 11 of the display screen 10, and the second piezo ceramic unit 52 is connected to the non-display surface of the second end 12 of the display screen 10. Therefore, the first piezo-ceramic unit 51 may drive the first end 11 of the display screen 10 to vibrate to generate an audio signal, and the second piezo-ceramic unit 52 may drive the second end 12 of the display screen 10 to vibrate to generate an audio signal. Accordingly, sound signals can be generated by the vibration of the first end portion 11 and the vibration of the second end portion 12 of the display screen 10, respectively, to create a stereo effect.

referring to fig. 5, fig. 5 is a schematic diagram illustrating a positional relationship between the display screen, the piezoelectric ceramic unit and the speaker in the electronic device 100 shown in fig. 1.

it will be appreciated that the display screen 10 also includes opposing first and second sides 13, 14. The first side 13 is connected to the first end 11 and the second end 12. The second side 14 is also connected to the first end 11 and the second end 12. The first side 13 may be, for example, a left side of the display screen 10 when the display surface faces the user, and the second side 14 may be a right side of the display screen 10.

The distance between the first piezo-ceramic unit 51 and the first side 13 is d1, and the distance d1 is the perpendicular distance between the first piezo-ceramic unit 51 and the first side 13. The distance d2 between the second piezo-ceramic element 52 and the first side 13 is the perpendicular distance d2 between the second piezo-ceramic element 52 and the first side 13. The distance d1 is equal to the distance d2, and the distances d1 and d2 are both smaller than a preset distance. That is, the first piezo ceramic unit 51 and the second piezo ceramic unit 52 are equidistant from the first side 13, and the distance is smaller than a predetermined distance. Alternatively, it can be understood that the first piezo ceramic unit 51 and the second piezo ceramic unit 52 are disposed on the same axis parallel to the first side 13, and the distance between the axis and the first side 13 is smaller than the preset distance.

The preset distance may be a preset distance value. For example, the preset distance may be 10mm (millimeters). The preset distance can be measured through experiments, so that when the distances between the first piezoelectric ceramic unit 51 and the first side 13 and between the second piezoelectric ceramic unit 52 and the first side are equal to each other and are smaller than the preset distance, a better stereo effect can be created.

It can be understood that, when the distances between the first piezo ceramic unit 51 and the first side 13 and the distances between the second piezo ceramic unit 52 and the first piezo ceramic unit 51 are equal, when the first piezo ceramic unit 51 drives the first end 11 of the display screen 10 to vibrate and the second piezo ceramic unit 52 drives the second end 12 of the display screen 10 to vibrate, a sound field difference between the first end 10 and the second end 12 of the display screen 10 can be avoided. Therefore, the sound effect of stereo sound can be created, the sound field difference can be avoided, and the user experience is improved.

Wherein the speaker 60 is disposed on the non-display surface side of the second end portion 12 of the display screen 10. For example, the speaker 60 may be disposed on the middle frame of the housing 20 at a position opposite to the second end 12 of the display screen 10. The distance between the speaker 60 and the second side 14 of the display screen 10 is d3, and the distance d3 is the perpendicular distance between the speaker 60 and the second side 14 of the display screen 10. Wherein the distance d3 is equal to the distance d1 between the first piezo-ceramic unit 51 and the first side 13 of the display screen 10, and is also equal to the distance d2 between the second piezo-ceramic unit 52 and the first side 13 of the display screen 10.

That is, the distance from the speaker 60 to the second side 14 is equal to the distance from the first piezo ceramic unit 51 to the first side 13 to the second piezo ceramic unit 52. Therefore, when the first end 11 of the display screen 10, the second end 12 of the display screen 10 and the speaker 60 simultaneously generate sound signals, it is also beneficial to create a stereo sound effect.

It will be appreciated that the loudspeaker 60 may be used to produce sound signals for mixed channels. The mixed channel includes at least two channels. For example, the mixed channels may include a left channel and a right channel. Accordingly, a stereo sound effect can be generated on the first side 13 of the display screen 10 through the first end 11 of the display screen 10 and the second end 12 of the display screen 10, and a stereo sound effect can also be generated on the second side 14 of the display screen 10 through the speaker 60. Therefore, a good stereo sound effect can be generated through the first end portion 11, the second end portion 12 and the speaker 60.

Referring to fig. 6, fig. 6 is a schematic diagram of an audio processing circuit in the electronic device 100 shown in fig. 1.

the circuit board 30 of the electronic device 100 is provided with an audio processing circuit 31. The audio processing circuit 31 is configured to process audio data of the electronic apparatus 100 to generate a sound signal, and transmit the generated sound signal to the outside of the electronic apparatus 100. For example, when the electronic device 100 plays music, the audio processing circuit 31 in the electronic device 100 may process music data to be played, thereby playing music; for another example, when the electronic device 100 performs a voice call, the audio processing circuit 31 processes voice data received by the electronic device 100, thereby playing a voice signal of a call partner.

The audio processing circuit 31 includes an audio signal source 311, a frequency separation circuit 312, a power amplification circuit 313, the first piezo ceramic unit 51, the second piezo ceramic unit 52, and the speaker 60. The audio signal source 311, the frequency separation circuit 312, and the power amplifier circuit 313 may be electrically connected in sequence through an audio bus, and the power amplifier circuit 313 may be electrically connected to the first piezoelectric ceramic unit 51, the second piezoelectric ceramic unit 52, and the speaker 60 through an audio bus.

The audio signal source 311 is used for generating an audio electrical signal. For example, the audio signal source 311 may be configured to decode an audio file to be played to generate an audio electrical signal; for another example, the audio signal source 311 may also be configured to demodulate and filter a radio frequency signal received by the electronic device 100 from the outside, so as to generate an audio electrical signal.

The frequency separation circuit 312 is configured to separate the audio electrical signal of the first frequency and the audio electrical signal of the second frequency from the audio electrical signal generated by the audio signal source 311. The separated audio electrical signal of the first frequency is used for driving the first piezo-ceramic unit 51 and the second piezo-ceramic unit 52 to generate vibration, so as to generate a sound signal. The separated electrical audio signal of the second frequency is used to drive the speaker 60 to generate an acoustic signal.

It is understood that the audio electrical signal generated by the audio signal source 311 may be transmitted to the first piezo ceramic unit 51 and the second piezo ceramic unit 52 through a first signal transmission path, and the audio electrical signal generated by the audio signal source 311 may be transmitted to the speaker 60 through a second signal transmission path.

the frequency separation circuit 312 includes a first filter 312A and a second filter 312B. The first filter 312A is disposed in the first signal transmission path. The first filter 312A is used for filtering the audio electrical signal transmitted in the first signal transmission path, so that the audio electrical signal of the first frequency can be separated from the audio electrical signal. The second filter 312B is disposed in the second signal transmission path. The second filter 312B is configured to filter the audio electrical signal transmitted through the second signal transmission path, so that the audio electrical signal of the second frequency can be separated from the audio electrical signal.

The power amplifying circuit 313 is configured to perform power amplification on the audio electrical signal of the first frequency and the audio electrical signal of the second frequency. The audio electrical signal of the first frequency is amplified by power and then used for driving the first piezoelectric ceramic unit 51 and the second piezoelectric ceramic unit 52 to generate a sound signal. The electrical audio signal of the second frequency is amplified with power and then used to drive the speaker 60 to generate an audio signal.

The power amplifier circuit 313 includes a first power amplifier 313A, a second power amplifier 313B, and a third power amplifier 313C. The first power amplifier 313A is provided in the first signal transmission path and electrically connected to the first piezoelectric ceramic unit 51. The first power amplifier 313A is configured to amplify the power of the audio electrical signal of the first frequency transmitted to the first piezo ceramic unit 51. The second power amplifier 313B is provided in the first signal transmission path and electrically connected to the second piezoceramic unit 52. The second power amplifier 313B is configured to power-amplify the audio electrical signal of the first frequency transmitted to the second piezo-ceramic unit 52. The third power amplifier 313C is disposed in the second signal transmission path and is electrically connected to the speaker 60. The third power amplifier 313C is configured to power amplify the audio electrical signal of the second frequency transmitted to the speaker 60.

It can be understood that, because the power requirement for driving the piezoelectric ceramic to vibrate and generate sound is relatively large, the operating voltages of the first power amplifier 313A and the second power amplifier 313B can be set to be relatively large. For example, the operating voltages of the first and second power amplifiers 313A and 313B may be set to 10V (volts). And the power requirement for driving the loudspeaker to generate sound is relatively small, so that the working voltage of the third power amplifier 313C can be set to be relatively small. For example, the operating voltage of the third power amplifier 313C may be set to 4.8V. That is, the operating voltages of the first power amplifier 313A and the second power amplifier 313B are greater than the operating voltage of the third power amplifier 313C.

It is understood that, in order to protect the speaker 60 from being damaged during the operation, the third power amplifier 313C may be configured as an intelligent power amplifier, and the speaker 60 is protected by the intelligent power amplifier. The third power amplifier 313C may detect the impedance and the temperature coefficient of the speaker 60 in real time, and feed the detected impedance and the temperature coefficient back to the power supply terminal of the third power amplifier 313C in a negative feedback manner, so that the operating voltage of the third power amplifier 313C may be adjusted in real time, and the operating voltage of the third power amplifier 313C may be maintained within a safe voltage range.

It is understood that the electronic device 100 may include multiple sound emission modes. For example, the electronic device 100 may include a first sound emission mode and a second sound emission mode. In the first sound emitting mode, the sound signal generated by the electronic device 100 is small; in the second sound emission mode, the sound signal generated by the electronic device 100 is relatively large. The first sound emission mode may be, for example, an earpiece mode, and the second sound emission mode may be, for example, a speaker mode.

In the first sound generation mode, the first piezo ceramic unit 51 generates a sound signal, and neither the second piezo ceramic unit 52 nor the speaker 60 generates a sound signal. That is, in the first sound generation mode, the electronic apparatus 100 generates the sound signal only through the first piezoelectric ceramic unit 51, so that the sound field of the electronic apparatus 100 is created through the first piezoelectric ceramic unit 51.

In the second sound emission mode, the first piezo ceramic unit 51, the second piezo ceramic unit 52, and the speaker 60 all generate sound signals. That is, in the second sound emission mode, the electronic device 100 generates a sound signal through the first piezoelectric ceramic unit 51, the second piezoelectric ceramic unit 52, and the speaker 60, so that a sound field of the electronic device 100 is created through the first piezoelectric ceramic unit 51, the second piezoelectric ceramic unit 52, and the speaker 60.

It is understood that a plurality of control switches may be disposed in the audio processing circuit 31. The control switches may be used to control the operation or non-operation of the first piezo ceramic unit 51, the second piezo ceramic unit 52, and the speaker 60. In the first sound generation mode, the first piezo ceramic unit 51 may be controlled to operate by the plurality of control switches, and the second piezo ceramic unit 52 and the speaker 60 may be controlled to not operate. In the second sound emission mode, the first piezo ceramic unit 51, the second piezo ceramic unit 52, and the speaker 60 may be controlled to operate simultaneously by the plurality of control switches.

Furthermore, it can be understood that, since the sound signal generated by the electronic device 100 is small in the first sound emitting mode, when the first piezoelectric ceramic unit 51 operates in the first sound emitting mode, the audio electric signal of the first frequency for driving the first piezoelectric ceramic unit 51 may not be subjected to power amplification. That is, in the first sound generation mode, the audio electrical signal of the first frequency directly drives the first piezoceramic unit 51 to vibrate to generate a sound signal.

A short-circuit switch may be connected in parallel to the first power amplifier 313A. When the audio electric signal of the first frequency for driving the first piezo-ceramic unit 51 does not need to be power-amplified, the short-circuit switch is closed so that the first power amplifier 313A is short-circuited, and at this time, the first power amplifier 313A does not operate. When the audio electrical signal of the first frequency for driving the first piezo-ceramic unit 51 needs to be power-amplified, the short-circuit switch is turned off so that the first power amplifier 313A operates normally.

In addition, since the sound signal generated by the electronic device 100 is large in the second sound generation mode, the audio electrical signals for driving the first piezoelectric ceramic unit 51, the second piezoelectric ceramic unit 52, and the speaker 60 all need to be power-amplified when operating in the second sound generation mode. At this time, the first frequency audio electrical signal may be power-amplified by the first power amplifier 313A to drive the first piezoelectric ceramic unit 51 to vibrate to generate a sound signal, the second frequency audio electrical signal may be power-amplified by the second power amplifier 313B to drive the second piezoelectric ceramic unit 52 to vibrate to generate a sound signal, and the second frequency audio electrical signal may be power-amplified by the third power amplifier 313C to drive the speaker 60 to generate a sound signal.

In the electronic device 100 provided in the embodiment of the present application, the first piezoelectric ceramic unit 51 and the second piezoelectric ceramic unit 52 can be used for driving the display screen 10 to vibrate to generate a sound signal with a higher frequency, and can also be used for generating a sound signal with a lower frequency through the speaker 60, so that the display screen 10 and the speaker 60 can be used for generating a sound signal together, which can ensure the high sound effect of the electronic device 100, and can ensure the low sound effect of the electronic device 100, thereby improving the sound generating effect of the electronic device 100.

In the description of the present application, it is to be understood that terms such as "first," "second," "third," and the like are used solely for distinguishing between similar elements and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

The electronic device provided by the embodiment of the application is described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.