CN112600958A

CN112600958A - Electronic equipment

Info

Publication number: CN112600958A
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: 2021-04-02
Anticipated expiration: 2040-12-07
Also published as: CN112600958B; WO2022121882A1

Abstract

The application discloses electronic equipment includes: a housing; the display module and the shell are enclosed to form an accommodating cavity; the induction module is positioned in the accommodating cavity, and at least part of the induction 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 induction module comprises a first functional area and a second functional area, and the first functional area and the fingerprint acquisition area of the display module are distributed relatively to acquire fingerprint information of the outer side surface of the display module; the second functional area is an acoustic area, and when the induction module is in the first working mode, the induction module outputs ultrasonic signals through the second functional area; when the induction module is in the second working mode, the induction module receives the sound wave signal through the second functional area and converts the sound wave signal into an electric signal. This application realizes fingerprint identification, receiver and pickup function respectively through setting up the response module, can realize pickup under the screen, reduces electronic equipment thickness.

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 stringent. Due to the requirements of lightness and thinness and full screen of the terminal, the thickness of the terminal is thinner and thinner, and the number of openings arranged on the screen is smaller and smaller, so that the terminal is difficult to integrate more functions. Taking the conversation function as an example, the intelligent terminal usually has independent telephone receiver and sound pick-up, and these parts function singleness but the volume is great, occupy the interior space of terminal great, and the restraint to the structure is piled up is stronger.

Disclosure of Invention

The application aims at providing electronic equipment for solve the problem that an independent functional component occupies a large 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 an accommodating cavity;

the induction module is positioned in the accommodating cavity, and at least part of the induction 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 induction module comprises a first functional area and a second functional area, and the first functional area and the fingerprint acquisition area of the display module are distributed oppositely 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 induction module outputs ultrasonic signals through the second functional area under the condition that the induction module is in the first working mode; and under the condition that the induction module is in a second working mode, the induction module receives the sound wave signal through the second functional area and converts the sound wave signal into an electric signal.

Therefore, according to the scheme of the application, the induction modules are arranged on the inner side surface of the display module, each induction 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 to realize a fingerprint identification function; the response module can realize two kinds of mode through the second functional area, output ultrasonic signal when first mode, realize the receiving function, receive the sound wave signal at second mode, realize the pickup function, this electronic equipment can realize fingerprint identification through the response module, a plurality of functions such as receiver and adapter, can reduce electronic equipment thickness, and electronic equipment can cancel and pick up the sound hole, realize the pickup under the screen, avoid picking up the feed liquor of sound hole, the dust admission scheduling problem influences the pickup function.

Additional aspects and advantages of the invention 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 invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram 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 present application.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. 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 features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to 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 those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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

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

the display module 2 and the shell 1 enclose to form an accommodating cavity;

the induction module 3 is positioned in the accommodating cavity, and at least part of the induction module 3 is arranged on the inner side surface of the display module 2 and is attached and connected with the inner side surface of the display module 2;

each induction module 3 comprises a first functional area and a second functional area, and the first functional area 31 and the fingerprint acquisition area of the display module 2 are distributed oppositely to acquire fingerprint information of the outer side surface of the display module; the second functional region 32 is an acoustic region, and when the sensing module 3 is in the first working mode, the sensing module 3 outputs an ultrasonic signal through the second functional region 32; under the condition that the sensing module 3 is in the second working mode, the sensing module 3 receives the sound wave signal through the second functional region 32, and converts the sound wave signal into an electrical signal.

Display module assembly 2 can be electronic equipment's display screen display module assembly 2 orientation the inside surface of electronic equipment is provided with response module assembly 3, response module assembly 3 is at least partly set up display module assembly 2's internal surface, just response module assembly 3 laminating is in display module assembly 3's medial surface. The induction module 3 may also be partially disposed outside the region corresponding to the display module 2, that is, the display module 2 may not completely cover the induction module 3.

Electronic equipment can include at least two response module 3, every response module 3 all has two functional areas of first functional area 31 and second functional area 32, wherein, first functional area 31 can set up the position below that the fingerprint collection area of display module assembly 2 corresponds for carry out fingerprint identification, be located promptly first functional area 31 the response module 3 gathers the fingerprint information of 2 lateral surfaces of display module assembly, thereby carry out fingerprint identification.

The second functional area 32 can be used as a sound pick-up or a telephone receiver, that is, the induction module can realize two working modes through the second functional area 32, wherein the first working mode is to convert an electric signal into an ultrasonic signal and output the ultrasonic signal to the air, so that the telephone receiver function is realized; the second working mode converts the sound wave signal transmitted by the external environment into an electric signal, so that the electric signal is stored or transmitted to other electronic equipment, and the function of a sound pick-up is realized.

According to the embodiment of the application, the induction modules are arranged on the inner side surface of the display module, each induction 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 to realize a fingerprint identification function; the response module can realize two kinds of mode through the second functional area, output ultrasonic signal when first mode, realize the receiving function, receive the sound wave signal at second mode, realize the pickup function, this electronic equipment can realize fingerprint identification through the response module, a plurality of functions such as receiver and adapter, can reduce electronic equipment thickness, and electronic equipment can cancel and pick up the sound hole, realize the pickup under the screen, avoid picking up the feed liquor of sound hole, the dust admission scheduling problem influences the pickup function.

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

The display area is an area capable of displaying images on the display module, and the non-display area is an area not displaying images 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 of the front of the electronic device, and the like. The second functional region 32 is arranged below the non-display region of the display module 2, so that the area of the display module occupied by the second functional region 32 can be reduced, and the internal space of the electronic equipment is saved. Will first functional area 31 sets up display module's display area below is favorable to user's operation when fingerprint identification, for example: the first functional area 31 is arranged in an area close to the lower frame in the middle of the display screen, and accords with the operation habit of fingerprint identification when a user holds the terminal.

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

Since the second functional region 32 is used to implement the function of a receiver or a sound pick-up, in order to ensure that an ultrasonic signal is transmitted to the outside air, at least a part of the second functional region needs to be uncovered, a through hole may be formed at a position of the display module 2 corresponding to the second functional region 32, and the second functional region 32 is disposed below the through hole; or, a through hole is formed in the shell of the electronic device, so that at least part of the second functional region is located below the through hole, and the ultrasonic signal is ensured to be transmitted out smoothly.

Specifically, the sensing module may include at least two Piezoelectric Ultrasonic transducers (PMUTs), and the at least two Piezoelectric Ultrasonic transducers PMUTs are arranged at intervals 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 of the sensing modules is composed of a PMUT array, a plurality of PMUTs of the PMUT array are divided into at least two regions, and a first region of the PMUT arrays is used as the first functional region, that is, a PMUT sensor of the first region is used to realize fingerprint recognition; the second area is used for implementing a microphone or receiver function as the second functional area, i.e. the PMUT sensor of the second area.

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

a substrate 41, wherein the substrate 41 is provided with a groove; a piezoelectric layer 42 disposed in the groove, and a cavity 43 is provided between the piezoelectric layer 42 and the groove bottom of the groove;

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; and an acoustic resistance matching layer 5 is arranged between the piezoelectric layer 42 and the display module 2.

The PMUT sensor is manufactured based on a Micro Electro Mechanical System (MEMS) process, and the entire sensor is disposed below the display module 2 through the acoustic resistance matching layer 5. The acoustic impedance matching layer 5 is used for connecting different materials on two sides of the acoustic impedance matching layer 5, and simultaneously, the reflection of ultrasonic waves between the different materials is reduced by using the impedance matching principle. The acoustic impedance matching layer may be a single layer of material or a combination of multiple layers of materials, such as: polyester resin (PET), Polytetrafluoroethylene (PTFE), and the like. Generally, the piezoelectric layer is somewhat soft and is easily deformed by an external force.

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

The substrate 41 is usually a silicon substrate with a concave shape, and the upper and lower electrodes and the piezoelectric layer 42 are supported between the acoustic impedance 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 can be filled with gas because the speed of sound of gas is far from that of solid (lower electrode), and the acoustic resistance of the gas is usually different greatly, so that the ultrasonic wave can sound and totally reflect when meeting the gas. Based on this, cavity 43 can reduce ultrasonic wave and leak downwards, can also superpose the ultrasonic wave of transmission on ascending transmission signal, strengthens the transmitted energy, improves the transduction efficiency.

When an external circuit applies a suitable electric signal between the upper and lower electrodes, the piezoelectric layer 42 deforms (as shown by the dotted line in fig. 2) and generates ultrasonic waves, and the ultrasonic waves continue to propagate into the display module 2 under the coupling action of the acoustic impedance matching layer.

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

The PMUT array includes a plurality of PMUT units, and the PMUT units located in the first area in fig. 3 transmit and receive ultrasonic waves, and can acquire a fingerprint image of the outer side surface of the display module 2. When the system applies an electrical signal with a certain frequency (generally corresponding to an ultrasonic frequency band) to the PMUT unit, the piezoelectric layer 42 of the PMUT deforms and presses the acoustic impedance matching layer 5 to deform, and because the piezoelectric layer 42, the upper electrode, and the acoustic impedance matching layer 5 are tightly attached, the deformation of the piezoelectric layer 42 will excite an ultrasonic wave with the corresponding frequency. The ultrasonic wave continues to propagate to the display module side through the acoustic resistance matching layer. At this time, if the surface of the display module 2 is pressed by the finger 6, most of the ultrasonic waves at the fingerprint ridge will be absorbed by the skin (transmitted waves), and because there is air between the fingerprint valley and the display module, the ultrasonic waves will be totally reflected (transmitted waves) at the interface between the air and the display module. The reflected ultrasonic waves will no longer be evenly distributed in space but will correspond to the pattern formed by the fingerprint valleys. The transmitted waves are received by the PMUT array, and due to the piezoelectric effect, the smaller energy of the reflected waves at the fingerprint ridges will generate a weaker electromotive force at the corresponding PMUT cells, and the larger energy of the reflected waves at the fingerprint valleys will generate a stronger electromotive force at the corresponding PMUT cells. Thus, the electromotive force distribution of the PMUT array can form a fingerprint pattern.

The PMUT cells located in the second area of fig. 3 have two modes of operation: the first working mode transmits ultrasonic waves, coherent waves are demodulated by air to obtain sound wave signals in the range of 20Hz to 20KHz, and the sound wave signals are used as a telephone receiver; the second working mode receives sound wave signals in the range of 20Hz to 20KHz and is used as a sound pickup.

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

The induction module for realizing the function of the telephone receiver can be one, namely, a plurality of PMUTs of one induction module emit ultrasonic signals with different frequencies, so that intermodulation sounding is realized. As shown in fig. 3, for example, the sensing module includes four PMUTs, where PMUTs of pixel 1 and pixel 2 are the first area, and PMUTs of pixel 3 and pixel 4 are the second area. When the sensing module operates in the first operating mode through the second functional region, the PMUT in the second region in fig. 3 may emit ultrasonic signals, and the frequencies of the ultrasonic signals are at least two: a first frequency f1 and a second frequency f 2.

Taking the PMUT cells corresponding to the pixels 3 and 4 in fig. 3 as an example, it is assumed that the PMUT of the pixel 3 emits ultrasonic waves at a frequency of f1 and the PMUT of the pixel 4 emits ultrasonic waves at a frequency of f 2. When the pixels 3, 4 transmit ultrasonic waves simultaneously, the ultrasonic waves will penetrate the acoustic resistance matching layer 5 to reach the air, because the reflection at the interface of the layer and the air layer will be greatly weakened by the acoustic resistance matching layer 5, and most of the ultrasonic waves can enter the air. Two groups of ultrasonic waves with frequencies of f1 and f2 are transmitted in air, and due to the self-demodulation effect of the air, the interaction and self-demodulation phenomena of f1 and f2 occur, and difference frequency (f1-f2) and sum frequency (f1+ f2) signals of the original ultrasonic waves are generated. The sum frequency signal (f1+ f2) is ultrasonic and inaudible to the human ear. If the difference frequency signal (f1-f2) falls within the range of 20 Hz-20 KHz, the difference frequency signal can be heard by human ears. The voice signals can be modulated on f1 and f2 in advance, and then the voice signals can be restored through difference frequency (f1-f2) 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 implementing the receiver function may also be at least two, for example, two sensing modules respectively transmit ultrasonic signals with different frequencies to implement intermodulation sounding. Specifically, the electronic equipment comprises at least two induction modules; and under the condition that the at least two induction modules are in a first working mode, the at least two induction modules transmit 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 first frequency f1, and the second induction module transmits an ultrasonic signal with the second frequency f 2. When the two induction modules simultaneously transmit ultrasonic signals, the ultrasonic signals reach the air. Two groups of ultrasonic signals with frequencies f1 and f2 are propagated in air, and the phenomena of interaction and self demodulation are generated, so that difference frequency (f1-f2) and sum frequency (f1+ f2) signals of the original ultrasonic waves are generated. If the difference frequency signal (f1-f2) falls within the range of 20 Hz-20 KHz, the difference frequency signal can be heard by human ears. Therefore, the voice signals can be modulated on f1 and f2 in advance, and the voice signals can be restored through the difference frequency (f1-f2) signals, so that the directional propagation of the voice signals is realized. As shown in fig. 4.

Optionally, the second functional region includes at least two PMUTs, a portion of the at least two PMUTs operating in the first operating mode, another portion of the at least two PMUTs operating in the second operating mode.

When the sensing module operates in the second operating mode through the second functional region, the PMUT of the second region in fig. 3 receives a voice signal. It should be noted that the speech signal is low in frequency and the ultrasonic signal is high, and that the PMUT, whether transmitting or receiving sound waves, is based on its response at the resonant frequency. Near the resonance frequency point of the PMUT, the transmitting and receiving transduction efficiency is the highest, i.e., the sensitivity is the most. The resonant frequency of the PMUT is related to the material, area, and thickness of the piezoelectric layer, and is also related to the cavity volume of the PMUT. Therefore, in order to realize two operation modes among the PMUTs in the second area, PMUTs of various specifications may be designed, such as: the first type of PMUT only works in a first working mode, and the resonance frequency point of the first type of PMUT is higher; the second type of PMUT only works in the second working mode, has low resonance frequency point and can respond to voice signals. When a person speaks near the PMUT array, sound waves pass through the acoustic impedance matching layer to reach the PMUT array, and at least part (such as a second type PMUT) of the sound wave energy of the person speaking can be sensed and converted into electric signals under the action of the piezoelectric effect. The principle is the same as that of the PMUT receiving ultrasonic signals, but the frequency is different, and the detailed description is omitted.

In this embodiment, the PMUT array is divided into at least two areas, where a first area of the PMUT array serves as the first functional area to implement a fingerprint recognition function; the second area of the PMUT array serves as the second functional area to implement a receiving or pickup function, and the sensing module formed by the PMUT array may have at least three functions: fingerprint identification, telephone receiver, sound pickup. Because the PMUT is manufactured based on the MEMS process, the thickness of the PMUT can be made thinner (less than 1 mm), which greatly reduces the thickness of the electronic device compared with the conventional receiver and sound pickup.

Optionally, as shown in fig. 5, there are two sensing modules 3, and an orthogonal projection of a first sensing module 300 in the two sensing modules 3 on the plane where the display module 2 is located in a first target area of the display module 2; the orthographic projection of the second sensing module 310 in 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 located 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 end and the bottom end of the electronic device, respectively. Taking the first target area as the area of the display module 2 near the top end of the electronic device and the second target area as the 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 end 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 rim of the electronic device, so that the second functional area of the first sensing module 300 can operate in the first operating mode to serve as a receiver; a second functional area of the second sensing module 310 can work in the second working mode to serve as a sound pickup; the first functional area 31 of the first sensing module 300 and the first functional area 31 of the second sensing module 310 can be used for fingerprint identification, so that the functions of fingerprint identification, sound pickup and telephone receiver can be realized simultaneously under 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 sensing module and used for controlling the working mode of the second functional area of the first sensing module and the working mode of the second functional area of the second sensing 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 second functional area of the second sensing module to implement three functions of fingerprint recognition, a sound pickup, and a receiver of the electronic device.

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

The relative positions of the first target region and the second target region 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 a user to realize functions of a receiver and a sound pick-up at the same time during a call, when the control module detects that the first target area is located above the second target area in the gravity direction (that is, the first target area is close to the ear of the user, and the second target area is close to the mouth of the user), the control module controls the second functional area of the first sensing module to be the first working mode so as to realize the function of the receiver, and controls the second functional area of the second sensing module to be the second working mode so as to realize the function of the sound pick-up. 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 ears of the person, and the first target area is close to the mouth of the user), the second functional area of the first sensing module is in a second working mode, so as to implement a sound pickup function; and the second functional area of the second induction module is in a first working mode, so that the function of the telephone receiver is realized.

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

Specifically, the area close to the sound source can be controlled to work in the second working mode, so that the sound pickup function is realized; and controlling the area far away from the sound source to work in the first working mode to realize the telephone receiving function. For example: the detection module determines that a sound source is closer to the second target area (namely, the sound signal is stronger) according to the intensity of the sound signal, the distance between the sound source and the first target area is longer (namely, the sound signal is weaker), the first target area is considered to be close to the ear at the moment, and the second target area is close to the mouth of the user, so that the second functional area of the first induction module is controlled to be in a first working mode, the receiver function is realized, and the second functional area of the second induction module is controlled to be in a second working mode, so that the sound pickup function is realized.

On the contrary, the detection module determines that the sounding sound source is closer to the first target area and the sounding sound source is farther from the second target area according to the intensity of the sound signal, and if the second target area is close to the ears of the user at the moment and the first target area is close to the mouth of the user, the second functional area of the first induction module is controlled to be in a second working mode, so that the function of a sound pick-up is realized; and controlling a second functional area of the second induction module to be in a first working mode, so as to realize the function of the telephone receiver.

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

The first PMUT array (i.e., the first sensing module 300) is arranged at the top of the electronic device, the second PMUT array (i.e., the second sensing module 310) is arranged at the bottom of the electronic device, a first area of the PMUT array and a second area of the PMUT array are both located under a screen, and the second area of the PMUT array and the second sensing module are both communicated with the air through an acoustic impedance matching layer. Under normal use, 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 region of the first PMUT array operates in the first operating mode, and is used for directional sounding to function as a receiver; the first area of second PMUT array is used for fingerprint identification, realizes functions such as unblock, payment, and the second area work of second PMUT array is in second mode for pick up the sound of people's speech, plays the effect of adapter.

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 region of the second PMUT array operates in the first operating mode, and is used for directional sounding to function as a receiver; the first region of first PMUT array is used for fingerprint identification, realizes functions such as unblock, payment, and the second region work of first PMUT array is in second mode for pick up the sound of people's speech, plays the effect of adapter.

So, through two PMUT arrays, can replace fingerprint identification, receiver, the adapter on the former electronic equipment to can conveniently realize the automatic adaptation that positive gripping, inversion gripped, improve user experience.

Other configurations, such as display modules, housings, etc., and operations of electronic devices according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, 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 an accommodating cavity;

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

the orthographic projection of the second functional area on the plane where the display module is located 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 has a first through hole;

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

4. The electronic device of claim 1, wherein the sensing module comprises at least two piezoelectric ultrasonic transducers PMUT, the at least two piezoelectric ultrasonic transducers PMUT being 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.

5. The electronic device of claim 4, 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 groove bottom of the groove;

a first electrode is arranged on the first surface of the piezoelectric layer, 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;

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

6. The electronic device of claim 4, wherein the electronic device comprises at least two sensing modules;

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

7. The electronic device of claim 4, wherein the second functional region comprises at least two PMUTs;

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

8. The electronic device of claim 4, wherein the second functional region comprises at least two PMUTs, a portion of the at least two PMUTs operating in the first operating mode and another portion of the at least two PMUTs operating in a second operating mode.

9. The electronic device according to claim 1, wherein the number of the 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;

the orthographic projection of a second induction module in the two induction modules on the 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 located at two opposite ends of the display module.

10. The electronic device of claim 9, further comprising a detection module and a control module connected to the detection module, wherein 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 sensing module and used for controlling the working mode of the second functional area of the first sensing module and the working mode of the second functional area of the second sensing module according to the relative position between the first target area and the second target area.

11. The electronic device of claim 10, wherein when the first target area is located above the second target area in a gravity direction, the second functional area of the first sensing module is in a first operating mode, and the second functional area of the second sensing module is in a second operating mode;

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