CN112600958B

CN112600958B - Electronic equipment

Info

Publication number: CN112600958B
Application number: CN202011430895.4A
Authority: CN
Inventors: 付从华
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2023-10-20
Anticipated expiration: 2040-12-07
Also published as: CN112600958A; WO2022121882A1

Abstract

The application discloses an electronic device, comprising: a housing; the display module is enclosed with the shell to form a containing cavity; the sensing module is positioned in the accommodating cavity, and at least part of the sensing module is arranged on the inner side surface of the display module and is in fit connection with the inner side surface of the display module; each sensing module comprises a first functional area and a second functional area, wherein the first functional area and a fingerprint acquisition area of the display module are distributed relatively so as to acquire fingerprint information of the outer side surface of the display module; the second functional area is an acoustic area, and when the sensing module is in the first working mode, the sensing module outputs an ultrasonic signal through the second functional area; when the sensing module is in the second working mode, the sensing module receives the sound wave signal through the second functional area and converts the sound wave signal into an electric signal. According to the application, the fingerprint identification, call receiving and pickup functions are respectively realized by arranging the induction module, so that the under-screen pickup can be realized, and the thickness of the electronic equipment is reduced.

Description

Electronic equipment

Technical Field

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

Background

With the increase of the variety of electronic devices, the functions of the intelligent terminal are more and more powerful, and the requirements on the reliability of the terminal are more and more severe. Due to the requirements of light weight, thinness and full screen of the terminal, the thickness of the terminal is thinner and the holes arranged on the screen are smaller, so that the terminal is difficult to integrate more functions. Taking the call function as an example, the intelligent terminal is generally provided with an independent receiver and a pickup, and the components are single in function and large in size, occupy large internal space of the terminal, and are strong in constraint on structural stacking.

Disclosure of Invention

The application aims to provide electronic equipment, which is used for solving the problem that an independent functional component occupies a larger internal space of the electronic equipment.

In a first aspect, an embodiment of the present application provides an electronic device, including:

a housing;

the display module and the shell are enclosed to form a containing cavity;

the sensing module is positioned in the accommodating cavity, and at least part of the sensing module is arranged on the inner side surface of the display module and is in fit connection with the inner side surface of the display module;

each sensing module comprises a first functional area and a second functional area, wherein the first functional area and the fingerprint acquisition area of the display module are distributed relatively so as to acquire fingerprint information of the outer side surface of the display module;

the second functional area is an acoustic area, and the sensing module outputs ultrasonic signals through the second functional area under the condition that the sensing module is in a first working mode; and under the condition that the sensing module is in a second working mode, the sensing module receives the sound wave signal through the second functional area and converts the sound wave signal into an electric signal.

In this way, according to the scheme, the induction modules are arranged on the inner side surfaces of the display modules, each induction module is provided with two functional areas, and the first functional area is used for collecting fingerprint information of the outer side surfaces of the display modules so as to realize a fingerprint identification function; the induction module can realize two kinds of operating modes through the second functional area, output ultrasonic signal when first operating mode, realize receiving the phone function, receive the sound wave signal at the second operating mode, realize pickup function, this electronic equipment can realize a plurality of functions such as fingerprint identification, receiver and adapter through the induction module, can reduce electronic equipment thickness, and electronic equipment can cancel the pickup hole, realizes the pick-up under the screen, avoids the feed liquor in pickup hole, advance problem such as dirt and influence pickup function.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 shows one of the schematic structural diagrams of an electronic device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a piezoelectric ultrasonic transducer PMUT according to an embodiment of the present application;

FIG. 3 shows a schematic diagram of a PMUT array according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of self-demodulation of a speech signal;

fig. 5 shows a second schematic structural diagram of an electronic device according to an embodiment of the application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The features of the application "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

An electronic device according to an embodiment of the present application is described below in conjunction with.

As shown in fig. 1, the electronic device includes: a housing 1;

the display module 2 is enclosed with the shell 1 to form a containing cavity;

the sensing module 3 is positioned in the accommodating cavity, and at least part of the sensing module 3 is arranged on the inner side surface of the display module 2 and is in fit connection with the inner side surface of the display module 2;

each sensing module 3 comprises a first functional area and a second functional area, and the first functional areas 31 are distributed opposite to fingerprint acquisition areas of the display modules 2 so as to acquire fingerprint information of the outer side surfaces of the display modules; the second functional area 32 is an acoustic area, and the sensing module 3 outputs an ultrasonic signal through the second functional area 32 when the sensing module 3 is in the first working mode; in the case that the sensing module 3 is in the second operation mode, the sensing module 3 receives an acoustic wave signal through the second functional area 32 and converts the acoustic wave signal into an electrical signal.

The display module 2 may be a display screen of the electronic device, the display module 2 faces the surface inside the electronic device, the induction module 3 is disposed, at least part of the induction module 3 is disposed on the inner surface of the display module 2, and the induction module 3 is attached to the inner side surface of the display module 3. The sensing module 3 may be further partially disposed outside the area corresponding to the display module 2, that is, the display module 2 may not completely cover the sensing module 3.

The electronic device may include at least two induction modules 3, each induction module 3 has a first functional area 31 and a second functional area 32, where the first functional area 31 may be disposed below a position corresponding to a fingerprint collection area of the display module 2, and is used for fingerprint identification, that is, the induction module 3 located in the first functional area 31 collects fingerprint information on an outer side surface of the display module 2, so as to perform fingerprint identification.

The second functional area 32 may be used as a sound pickup or a sound receiver, that is, the sensing module may implement two working modes through the second functional area 32, where the first working mode is to convert an electrical signal into an ultrasonic signal and output the ultrasonic signal to the air, so as to implement the function of the sound receiver; the second working mode converts sound wave signals transmitted by the external environment into electric signals, so that the electric signals are stored or transmitted to other electronic equipment, and the function of a pickup is realized.

According to the embodiment of the application, the sensing modules are arranged on the inner side surface of the display module, each sensing module is provided with two functional areas, and the first functional area is used for collecting fingerprint information of the outer side surface of the display module so as to realize a fingerprint identification function; the induction module can realize two kinds of operating modes through the second functional area, output ultrasonic signal when first operating mode, realize receiving the phone function, receive the sound wave signal at the second operating mode, realize pickup function, this electronic equipment can realize a plurality of functions such as fingerprint identification, receiver and adapter through the induction module, can reduce electronic equipment thickness, and electronic equipment can cancel the pickup hole, realizes the pick-up under the screen, avoids the feed liquor in pickup hole, advance problem such as dirt and influence pickup function.

Optionally, the orthographic projection of the first functional area 31 on the plane where the display module 2 is located in the display area of the display module 2; the orthographic projection of the second functional area 32 on the plane of the display module 2 is located in a non-display area of the display module 2.

The display area is an area capable of displaying an image on the display module, and the non-display area is an area not displaying an image on the display module, for example, an earphone area at the top of the front of the electronic device, an area near the frame at the bottom, and the like. The second functional area 32 is disposed below the non-display area of the display module 2, so that the area of the display module occupied by the second functional area 32 can be reduced, and the internal space of the electronic device can be saved. The first functional area 31 is disposed below the display area of the display module, which is favorable for the user to operate during fingerprint identification, for example: the first functional area 31 is arranged in the middle of the display screen and near the area of the lower frame, so that the operation habit of fingerprint identification when a user holds the terminal is met.

Further, the non-display area of the display module is provided with a first through hole, or the shell is provided with the first through hole; in the axial direction of the first through hole, the second functional area is at least partially opposite to the first through hole, that is, the orthographic projection of the second functional area on the plane where the display module is located is at least partially overlapped with the first through hole.

Since the second functional area 32 is used for realizing the function of a receiver or a pickup, in order to ensure that the ultrasonic signal is transmitted to the outside air, if the second functional area needs to be at least partially uncovered, a through hole may be formed at a position of the display module 2 corresponding to the second functional area 32, and the second functional area 32 may be disposed below the through hole; or, a through hole is formed in the shell of the electronic device, so that the second functional area is at least partially positioned below the through hole, and smooth transmission of the ultrasonic signal is ensured.

In particular, the sensing module may include at least two piezoelectric ultrasonic transducers (Piezoelectric Micromachined Ultrasonic Transducer, PMUT) that are spaced apart to form a PMUT array; the first region of the PMUT array is the first functional region, and the second region of the PMUT array is the second functional region. In this embodiment, each sensing module is formed by a PMUT array, where a plurality of PMUTs of the PMUT array are divided into at least two areas, and a first area is used as the first functional area, i.e., a PMUT sensor of the first area is used to implement fingerprint identification; the second area is used as the second functional area, i.e. the PMUT sensor of the second area is used for realizing the microphone or receiver function.

As shown in fig. 2, the piezoelectric ultrasonic transducer PMUT includes:

a base 41, the base 41 being provided with a recess; a piezoelectric layer 42 disposed in the recess, and a cavity 43 is formed between the piezoelectric layer 42 and the bottom of the recess;

a first electrode is arranged on the first surface of the piezoelectric layer 42, a second electrode is arranged on the second surface of the piezoelectric layer, and the polarities of the first electrode and the second electrode are opposite; an acoustic impedance matching layer 5 is arranged between the piezoelectric layer 42 and the display module 2.

The PMUT sensor is fabricated based on microelectromechanical systems (Micro Electro Mechanical System, MEMS) technology, the entire sensor being arranged below the display module 2 by an acoustic impedance matching layer 5. The acoustic matching layer 5 is used for connecting different materials at two sides of the acoustic matching layer 5, and simultaneously, the reflection of ultrasonic waves between the different materials is reduced by utilizing the principle of impedance matching. The acoustic matching layer may be a single layer of material or a combination of layers of material, such as: polyester resin (Polyethylene Terephthalate, PET), polytetrafluoroethylene (Poly Tetra Fluoroethylene, PTFE), and the like. In general, the piezoelectric layer is slightly soft in texture and is easily deformed by an external force.

The piezoelectric layer 42 is a thin film made of a material having a remarkable piezoelectric effect, and is capable of generating deformation (inverse piezoelectric effect) when a voltage signal is applied to both sides thereof, and is capable of generating electromotive force (piezoelectric effect) on both sides thereof when it is forced to generate deformation. The upper and lower surfaces of the piezoelectric layer are coated with thin film electrodes, and the upper electrode is located between the piezoelectric layer 42 and the acoustic impedance matching layer 5.

The substrate 41 is typically a concave silicon substrate, and the upper and lower electrodes and the piezoelectric layer 42 are supported between the acoustic matching layer 5 and the substrate 41, and a cavity 43 is formed between the substrate 41 and the piezoelectric layer 42. The cavity 43 may be filled with a gas, which typically has a large difference in acoustic resistance due to the fact that the gas has a very different acoustic speed from the solid (lower electrode), and the ultrasonic waves will sound totally reflected when they encounter the gas. Based on this, the cavity 43 can reduce leakage of the ultrasonic wave downward, and can superimpose the emitted ultrasonic wave on the upward emission signal, enhancing emission energy, and improving transduction efficiency.

When an appropriate electrical signal is applied between the upper and lower electrodes by an external circuit, the piezoelectric layer 42 deforms (as shown by the dashed lines in fig. 2) and generates ultrasonic waves, which continue to propagate into the display module 2 under the coupling action of the acoustic matching layer.

As shown in fig. 3, the PMUT array is covered by an acoustic impedance matching layer 5, the PMUT array being divided into at least two regions: a first region and a second region. The display module 2 is covered above the first region PMUT array, the display region corresponding to the display module 2 is covered with the acoustic impedance matching layer 5 between the first region of the PMUT array and the display module 2, and the first region and the display module 2 are in close contact. And an acoustic matching layer 5 is covered above the PMUT array in the second area, the acoustic matching layer 5 corresponds to a non-display area of the display module, and through holes are formed in the non-display area, so that one side of the acoustic matching layer 5 is in close contact with the PMUT array, and the other side of the acoustic matching layer is in contact with the outside air.

The PMUT array comprises a plurality of PMUT units, and the PMUT units positioned in the first area in the figure 3 transmit and receive ultrasonic waves, so that fingerprint images of the outer side face of the display module 2 can be acquired. When the system applies an electrical signal of a certain frequency (usually corresponding to an ultrasonic frequency band) to the PMUT cell, the piezoelectric layer 42 of the PMUT deforms and presses the acoustic matching layer 5 to deform, because the piezoelectric layer 42, the upper electrode, and the acoustic matching layer 5 are tightly attached, the deformation of the piezoelectric layer 42 will excite an ultrasonic wave of a corresponding frequency. The ultrasonic wave continues to propagate to the display module assembly side through the acoustic impedance matching layer. At this time, if the finger 6 presses the surface of the display module 2, most of the ultrasonic waves at the fingerprint ridge will be absorbed by the skin (transmitted wave), and the ultrasonic waves will be totally reflected (emitted wave) at the interface between the air and the display module due to the air between the fingerprint valley and the display module. The reflected ultrasonic waves will no longer be spatially uniformly distributed but correspond to the pattern formed by the fingerprint valleys. The transmitted wave is received by the PMUT array, and due to the piezoelectric effect, a smaller reflected wave energy at the fingerprint ridge will produce a weaker electromotive force at the corresponding PMUT cell, and a larger reflected wave energy at the fingerprint valley will produce a stronger electromotive force at the corresponding PMUT cell. Thus, the electromotive force distribution of the PMUT array can form a fingerprint pattern.

The PMUT cells located in the second region of fig. 3 have two modes of operation: the first working mode transmits ultrasonic waves, and utilizes air to demodulate coherent waves to obtain sound wave signals in the range of 20 Hz-20 KHz, and the sound wave signals are used as receivers; the second mode of operation receives acoustic signals in the range of 20 Hz-20 KHz for use as a pickup.

Optionally, the second functional area includes at least two PMUTs; and under the condition that the sensing module is in the first working mode, the PMUT of the second functional area transmits ultrasonic signals with at least two frequencies.

The induction module for realizing the receiver function can be one, namely, a plurality of PMUTs of one induction module emit ultrasonic signals with different frequencies to realize intermodulation sounding. As shown in fig. 3, the sensing module includes four PMUTs as an example, wherein PMUTs of the pixel 1 and the pixel 2 are a first area, and PMUTs of the pixel 3 and the pixel 4 are a second area. When the sensing module operates in the first operation mode through the second functional area, the PMUT in the second area in fig. 3 transmits an ultrasonic signal, and frequencies of the ultrasonic signal are at least two: a first frequency f1 and a second frequency f2.

Taking PMUT cells corresponding to pixels 3 and 4 in fig. 3 as an example, let the frequency of the ultrasonic wave emitted by PMUT of pixel 3 be f1 and the frequency of the ultrasonic wave emitted by PMUT of pixel 4 be f2. When the pixels 3, 4 emit ultrasound waves simultaneously, the ultrasound waves will reach the air through the acoustic matching layer 5, since the acoustic matching layer 5 will greatly attenuate the reflection at the interface of this layer and the air layer, most of the ultrasound waves will be allowed to enter the air. The two groups of ultrasonic waves with the frequencies of f1 and f2 propagate in the air, and because the air has a self-demodulation effect, the f1 and the f2 can interact and self-demodulate, and difference frequency (f 1-f 2) and sum frequency (f1+f2) signals of the original ultrasonic waves are generated. The sum frequency signal (f1+f2) is an ultrasonic wave, and is inaudible to the human ear. If the difference frequency signal (f 1-f 2) falls within the range of 20 Hz-20 KHz, it can be heard by the human ear. The voice signals can be modulated on f1 and f2 in advance, and then the voice signals can be restored through the difference frequency (f 1-f 2) signals, so that the directional propagation of the voice signals is realized. As shown in fig. 4.

As an alternative embodiment, the number of the sensing modules for realizing the receiver function may be at least two, for example, the two sensing modules respectively transmit ultrasonic signals with different frequencies to realize intermodulation sounding. Specifically, the electronic device comprises at least two induction modules; and under the condition that the at least two induction modules are in the first working mode, the at least two induction modules emit ultrasonic signals with at least two frequencies.

When the two induction modules work in the first working mode through the respective second functional areas, the first induction module transmits an ultrasonic signal with the frequency of the first frequency f1, and the second induction module transmits an ultrasonic signal with the frequency of the second frequency f2. When the two induction modules simultaneously emit ultrasonic signals, the ultrasonic signals reach the air. The two groups of ultrasonic signals with frequencies f1 and f2 propagate in the air, interaction and self-demodulation occur, and difference frequency (f 1-f 2) and sum frequency (f1+f2) signals of the original ultrasonic waves are generated. If the difference frequency signal (f 1-f 2) falls within the range of 20 Hz-20 KHz, it can be heard by the human ear. Therefore, the voice signals can be modulated on f1 and f2 in advance, and the voice signals can be restored through the difference frequency (f 1-f 2) signals, so that the directional propagation of the voice signals is realized. As shown in fig. 4.

Optionally, the second functional area includes at least two PMUTs, a part of the at least two PMUTs operating in the first operating mode, and another part of the at least two PMUTs operating in the second operating mode.

When the sensing module operates in the second operation mode through the second functional area, the PMUT in the second area in fig. 3 receives a voice signal. The frequency of the voice signal is low, the frequency of the ultrasonic signal is high, and the PMUT is based on the response of the resonance frequency of the PMUT, whether transmitting or receiving sound waves. The transduction efficiency of the transmission and the reception is the highest, namely the most sensitive, near the resonance frequency point of the PMUT. The resonance frequency point of the PMUT is related to the material, the area and the thickness of the piezoelectric layer, and is also related to the cavity volume of the PMUT. Therefore, among the plurality of PMUTs in the second region, in order to realize two operation modes, PMUTs of various specifications may be designed, such as: the first PMUT only works in a first working mode, and the resonance frequency point is higher; the second PMUT only works in the second working mode, and the resonance frequency point is lower, so that the second PMUT can respond to voice signals. When a person speaks near the PMUT array, sound waves can pass through the acoustic matching layer to reach the PMUT array, at least part (such as a second type PMUT) of the PMUT can sense the sound wave energy of the person speaking, and the sound wave energy can be converted into an electric signal under the action of a piezoelectric effect. The principle is the same as that of the PMUT receiving the ultrasonic signal, but the frequencies are different, and the specific principle is not repeated.

In this embodiment, the PMUT array is divided into at least two areas, where a first area of the PMUT array is used as the first functional area to implement a fingerprint identification function; and the second area of the PMUT array is used as the second functional area to realize the receiving or pickup function, so that the induction module formed by the PMUT array at least has three functions: fingerprint identification, receiver, pickup. Because PMUT is based on MEMS technology and makes, its thickness can be accomplished relatively thinly (below 1 mm), compares traditional receiver, pickup, greatly reduced electronic equipment thickness.

Optionally, as shown in fig. 5, the number of the sensing modules 3 is two, and the orthographic projection of the first sensing module 300 in the two sensing modules 3 on the plane where the display module 2 is located in the first target area of the display module 2; the orthographic projection of the second sensing module 310 in the two sensing modules on the plane of the display module 2 is located in a second target area of the display module 2; the first target area and the second target area are respectively positioned at two opposite ends of the display module.

In this embodiment, the first target area and the second target area may be areas of the display module 2 near the top and bottom of the electronic device, respectively. Taking the first target area as an area of the display module 2 near the top end of the electronic device and the second target area as an area of the display module 2 near the bottom end of the electronic device as an example, in the first target area, the second functional area 32 of the first sensing module 300 is located near the top frame of the electronic device; in the second target area, the second functional area 32 of the second sensing module 310 is located near the bottom border of the electronic device, so that the second functional area of the first sensing module 300 can work in the first working mode to make a receiver; the second functional area of the second sensing module 310 may work in the second working mode to be used as a pickup; the first functional area 31 of the first sensing module 300 and the first functional area 31 of the second sensing module 310 may be used for fingerprint identification, so that fingerprint identification, a sound pick-up and a receiver function may be simultaneously implemented below the display module.

Optionally, the electronic device further includes a detection module and a control module connected to the detection module, where the detection module is configured to detect a relative position between the first target area and the second target area; the control module is connected with the induction module and is used for controlling the working mode of the second functional area of the first induction module and the working mode of the second functional area of the second induction module according to the relative position between the first target area and the second target area.

In this embodiment, the control module is configured to control the second functional area of the first sensing module and the working mode of the second functional area of the second sensing module, so that the electronic device can simultaneously implement three functions of fingerprint identification, a pickup and a receiver.

Specifically, when the first target area is located above the second target area in the gravity direction, the second functional area of the first sensing module is in a first working mode, and the second functional area of the second sensing module is in a second working mode; when the first target area is located below the second target area, the second functional area of the first sensing module is in a second working mode, and the second functional area of the second sensing module is in a first working mode.

The relative positions of the first target area and the second target area may include: the first target area is located above, below, to the left, to the right, etc. of the second target area. In order to facilitate the user to realize the receiver and pickup functions simultaneously during the conversation, the control module controls the second functional area of the first sensing module to be in the first working mode so as to realize the receiver function and controls the second functional area of the second sensing module to be in the second working mode so as to realize the pickup function when detecting that the first target area is positioned above the gravity direction of the second target area (namely, the first target area is close to the human ear and the second target area is close to the mouth of the user). Conversely, when the first target area is located below the second target area in the gravity direction (i.e., the second target area is close to the ear, and the first target area is close to the mouth of the user), the second functional area of the first sensing module is in the second working mode, so as to realize the function of the pickup; the second functional area of the second sensing module is in a first working mode, and the receiver function is realized.

Optionally, the electronic device further includes a second detection module, the second detection module is connected with the control module, the second detection module is used for detecting the relative positions of the sounding sound source and the first target area and the second target area, the control module is connected with the induction module, and the control module is used for controlling the second functional area working mode of the first induction module and the second functional area working mode of the second induction module according to the relative positions of the sounding sound source and the first target area and the second target area.

Specifically, a region which is closer to the sounding sound source can be controlled to work in the second working mode, so that a sound pickup function is realized; and controlling the region far away from the sounding sound source to work in the first working mode so as to realize the receiving function. For example: the detection module determines that the sounding sound source is closer to the second target area (i.e. the sound signal is stronger) according to the intensity of the sound signal, the sounding sound source is farther from the first target area (i.e. the sound signal is weaker), the first target area is considered to be close to the human ear at this time, the second target area is close to the position of the mouth of the user, then the second functional area of the first induction module is controlled to be in a first working mode so as to realize the receiver function, and the second functional area of the second induction module is controlled to be in a second working mode so as to realize the pickup function.

Conversely, the detection module determines that the sound source is closer to the first target area according to the intensity of the sound signal, the distance between the sound source and the second target area is longer, and the second target area is considered to be close to the human ear at the moment, and the first target area is close to the position of the mouth of the user, so that the second functional area of the first sensing module is controlled to be in a second working mode, and the function of the pickup is realized; and controlling a second functional area of the second sensing module to be in a first working mode, so as to realize the function of the receiver.

Taking the electronic device including two sensing modules as an example, as shown in fig. 5, each sensing module is formed by PMUT arrays, that is, the electronic device has two PMUT arrays, which all satisfy the features of the PMUT arrays.

The first PMUT array (i.e., the first sensing module 300) is disposed at the top of the electronic device, the second PMUT array (i.e., the second sensing module 310) is disposed at the bottom of the electronic device, the first areas of the first PMUT array and the second PMUT array are both located under the screen, and the second areas are both communicated with air through the acoustic impedance matching layer. Under normal use conditions, the first PMUT array faces upward (near the human ear) and the second PMUT array faces downward (near the human mouth). At this time, the second area of the first PMUT array works in the first working mode and is used for directional sounding to play a role of a receiver; the first area of the second PMUT array is used for fingerprint identification, achieves functions of unlocking, payment and the like, and the second area of the second PMUT array works in a second working mode and is used for picking up voice of a person speaking and playing a role of a pickup.

When the user holds the electronic device upside down, the second PMUT array faces upward (near the human ear) and the first PMUT array faces downward (near the human mouth). At this time, the second area of the second PMUT array works in the first working mode and is used for directional sounding to play a role of a receiver; the first area of the first PMUT array is used for fingerprint identification, achieves functions of unlocking, payment and the like, and the second area of the first PMUT array works in a second working mode and is used for picking up voice of a person speaking and playing a role of a pickup.

Therefore, fingerprint identification, a receiver and a pickup on original electronic equipment can be replaced through the two PMUT arrays, automatic adaptation of forward holding and inverted holding can be conveniently realized, and user experience is improved.

Other components of the electronic device, such as the display module and the housing, and the operation thereof, according to embodiments of the present application are known to those of ordinary skill in the art, and will not be described in detail herein. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic device, comprising:

a housing;

the display module and the shell are enclosed to form a containing cavity;

the second functional area is an acoustic area, and the induction module realizes two working modes through the second functional area; under the condition that the induction module is in a first working mode, the induction module outputs ultrasonic signals through the second functional area to realize the receiver function; under the condition that the induction module is in a second working mode, the induction module receives sound wave signals through the second functional area and converts the sound wave signals into electric signals so as to realize the function of a pickup;

the induction module comprises at least two piezoelectric ultrasonic transducers PMUT, and the at least two piezoelectric ultrasonic transducers PMUT are arranged at intervals to form a PMUT array;

the first area of the PMUT array is the first functional area, and the second area of the PMUT array is the second functional area;

the second functional area includes at least two PMUTs, a portion of the at least two PMUTs operating in the first mode of operation and another portion of the at least two PMUTs operating in a second mode of operation.

2. The electronic device of claim 1, wherein an orthographic projection of the first functional area on a plane of the display module is located in a display area of the display module;

and the orthographic projection of the second functional area on the plane where the display module is located is positioned in a non-display area of the display module.

3. The electronic device according to claim 1, wherein the non-display area of the display module has a first through hole, or the housing is provided with a first through hole;

the second functional region is at least partially opposite to the first through hole in the axial direction of the first through hole.

4. The electronic device of claim 1, wherein the piezoelectric ultrasonic transducer PMUT comprises:

the substrate is provided with a groove;

the piezoelectric layer is arranged in the groove, and a cavity is formed between the piezoelectric layer and the bottom of the groove;

the first surface of the piezoelectric layer is provided with a first electrode, the second surface of the piezoelectric layer is provided with a second electrode, and the polarities of the first electrode and the second electrode are opposite;

an acoustic impedance matching layer is arranged between the piezoelectric layer and the display module.

5. The electronic device of claim 1, wherein the electronic device comprises at least two sensing modules;

and under the condition that the at least two induction modules are in the first working mode, the at least two induction modules emit ultrasonic signals with at least two frequencies.

6. The electronic device of claim 1, wherein the second functional area comprises at least two PMUTs;

and under the condition that the sensing module is in the first working mode, the PMUT of the second functional area transmits ultrasonic signals with at least two frequencies.

7. The electronic device of claim 1, wherein the number of sensing modules is two, and an orthographic projection of a first sensing module of the two sensing modules on a plane where the display module is located in a first target area of the display module;

orthographic projection of a second sensing module in the two sensing modules on a plane where the display module is located in a second target area of the display module;

the first target area and the second target area are respectively positioned at two opposite ends of the display module.

8. The electronic device of claim 7, further comprising a detection module for detecting a relative position between the first target area and the second target area, and a control module coupled to the detection module;

the control module is connected with the induction module and is used for controlling the working mode of the second functional area of the first induction module and the working mode of the second functional area of the second induction module according to the relative position between the first target area and the second target area.

9. The electronic device of claim 8, wherein the second functional area of the first sensing module is a first operating mode and the second functional area of the second sensing module is a second operating mode when the first target area is above the second target area in a direction of gravity;

when the first target area is located below the second target area, the second functional area of the first sensing module is in a second working mode, and the second functional area of the second sensing module is in a first working mode.