WO2022121882A1 - 一种电子设备 - Google Patents

一种电子设备 Download PDF

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Publication number
WO2022121882A1
WO2022121882A1 PCT/CN2021/136022 CN2021136022W WO2022121882A1 WO 2022121882 A1 WO2022121882 A1 WO 2022121882A1 CN 2021136022 W CN2021136022 W CN 2021136022W WO 2022121882 A1 WO2022121882 A1 WO 2022121882A1
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Prior art keywords
area
module
functional area
display module
electronic device
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PCT/CN2021/136022
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English (en)
French (fr)
Inventor
付从华
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维沃移动通信有限公司
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Publication of WO2022121882A1 publication Critical patent/WO2022121882A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/003—Mems transducers or their use

Definitions

  • the present application relates to the field of communication technologies, and in particular, to an electronic device.
  • smart terminals As the types of electronic devices increase, the functions of smart terminals are becoming more and more powerful, and the requirements for the reliability of the terminals are becoming more and more stringent. Due to the thinning and full screen requirements of the terminal, the thickness of the terminal is getting thinner and fewer openings are set on the screen, which makes it difficult to integrate more functions of the terminal. Taking the call function as an example, smart terminals usually have independent receivers and pickups. These components have a single function but are large in size, occupy a large internal space of the terminal, and have strong constraints on structural stacking.
  • the present application aims to provide an electronic device to solve the problem that independent functional components occupy a large internal space of the electronic device.
  • an electronic device including:
  • a display module the display module and the casing are enclosed to form a accommodating cavity
  • the sensing module is located in the accommodating cavity, and at least part of the sensing module is disposed on the inner side of the display module, and is attached and connected with the inner side of the display module;
  • Each of the sensing modules includes a first functional area and a second functional area.
  • the first functional area is relatively distributed with the fingerprint collection area of the display module to collect fingerprint information on the outer side of the display module. ;
  • the second functional area is an acoustic area.
  • the induction module 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 In the case of the working mode, the sensing module receives the sound wave signal through the second functional area, and converts the sound wave signal into an electrical signal.
  • an induction module is arranged on the inner side of the display module, each induction module has two functional areas, and the first functional area is used to collect fingerprint information on the outer side of the display module to realize fingerprinting.
  • identification function the induction module can realize two working modes through the second functional area, output ultrasonic signals in the first working mode to realize the function of receiving a call, and receive sound wave signals in the second working mode to realize the pickup function.
  • the electronic device can realize multiple functions such as fingerprint recognition, receiver and pickup through the induction module, which can reduce the thickness of the electronic device, and the electronic device can cancel the sound pickup hole, realize the sound pickup under the screen, and avoid the liquid and dust entering the sound pickup hole. And other problems affect the pickup function.
  • FIG. 1 shows one of the schematic structural diagrams of an electronic device according to an embodiment of the present application
  • Fig. 2 shows the structural schematic diagram of the piezoelectric ultrasonic transducer PMUT of the 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 represents the schematic diagram of the self-demodulation of speech signal
  • FIG. 5 shows the second schematic structural diagram of the electronic device according to the embodiment of the present application.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • the electronic device includes: a casing 1;
  • a display module 2, the display module 2 and the casing 1 are enclosed to form a accommodating cavity;
  • the induction module 3 is located in the receiving cavity, at least part of the induction module 3 is arranged on the inner side of the display module 2, and is attached to the inner side of the display module 2 combined connection;
  • Each of the sensing modules 3 includes a first functional area and a second functional area.
  • the first functional area 31 is relatively distributed with the fingerprint collection area of the display module 2 to collect the outer surface of the display module. fingerprint information;
  • the second functional area 32 is an acoustic area, and when the sensing module 3 is in the first working mode, the sensing module 3 outputs ultrasonic signals through the second functional area 32;
  • the sensing module 3 receives acoustic wave signals through the second functional area 32 and converts the acoustic wave signals into electrical signals.
  • the display module 2 can be a display screen of the electronic device, and the sensing module 3 is provided on the surface of the display module 2 facing the interior of the electronic device, and the sensing module 3 is at least partially provided On the inner surface of the display module 2 , and the sensing module 3 is attached to the inner surface of the display module 3 .
  • the sensing module 3 may also be 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 of the sensing modules 3, and each of the sensing modules 3 has two functional areas: a first functional area 31 and a second functional area 32, wherein the first functional area 31 can be It is arranged below the position corresponding to the fingerprint collection area of the display module 2, and is used for fingerprint identification, that is, the sensing module 3 located in the first functional area 31 collects the fingerprint on the outer side of the display module 2. information for fingerprint identification.
  • the second functional area 32 can be used as a pickup or a receiver, that is, the induction module can realize two working modes through the second functional area 32.
  • the first working mode is to convert electrical signals into ultrasonic signals and output them to the air.
  • the sound wave signal transmitted by the external environment is converted into an electrical signal, so as to be stored or transmitted to other electronic devices, so as to realize the pickup function.
  • sensing modules are arranged on the inner side of the display module, each sensing module has two functional areas, and the first functional area is used to collect fingerprint information on the outer side of the display module to realize the fingerprint recognition function
  • the induction module can realize two working modes through the second functional area, output ultrasonic signals in the first working mode to realize the function of receiving a call, and receive the sound wave signal in the second working mode to realize the sound pickup function.
  • multiple functions such as fingerprint recognition, receiver and pickup can be realized, which can reduce the thickness of electronic equipment, and the electronic equipment can cancel the sound pickup hole, realize sound pickup under the screen, and avoid problems such as liquid and dust entering the sound pickup hole. Affects the pickup function.
  • the orthographic projection of the first functional area 31 on the plane where the display module 2 is located is located in the display area of the display module 2; the second functional area 32 is located on the plane where the display module 2 is located.
  • the orthographic projection of is located in the non-display area of the display module 2 .
  • the display area is an area on the display module that can display images
  • the non-display area is an area on the display module that does not display images, such as the earpiece area at the top of the front of the electronic device, the area at the bottom of the electronic device Areas close to the border, etc.
  • Disposing the second functional area 32 below the non-display area of the display module 2 can reduce the area of the display module occupied by the second functional area 32 and save the internal space of the electronic device.
  • the first functional area 31 is arranged below the display area of the display module, which is beneficial to the user's operation during fingerprint recognition.
  • the first functional area 31 is arranged in the middle of the display screen and close to the lower frame area. , which conforms to the operating habit of fingerprint recognition when the user holds the terminal.
  • the non-display area of the display module has a first through hole, or the casing is provided with a first through hole; in the axial direction of the first through hole, the second functional area and the The first through holes are at least partially opposite, that is, the orthographic projection of the second functional area on the plane where the display module is located at least partially overlaps with the first through holes.
  • the second functional area 32 is used to realize the function of a receiver or a pickup, in order to ensure that the ultrasonic signal is transmitted to the outside air, it is necessary to keep the second functional area at least partially uncovered, and the second functional area can be used in conjunction with the second functional area.
  • a through hole is opened at the position of the display module 2 corresponding to the functional area 32, and the second functional area 32 is arranged below the through hole; The second functional area is at least partially located below the through hole, so as to ensure the smooth transmission of the ultrasonic signal.
  • the induction module may include at least two piezoelectric ultrasonic transducers (Piezoelectric Micromachined Ultrasonic Transducer, PMUT), the at least two piezoelectric ultrasonic transducers PMUTs are arranged at intervals to form a PMUT array; the 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.
  • PMUT piezoelectric Micromachined Ultrasonic Transducer
  • each of the sensing modules is composed of a PMUT array, and a plurality of PMUTs in the PMUT array are divided into at least two regions, wherein the first region is used as the first functional region, that is, the first The PMUT sensor in the area is used to implement fingerprint recognition; the second area is used as the second functional area, that is, the PMUT sensor in the second area is used to implement the function of a pickup or a receiver.
  • the piezoelectric ultrasonic transducer PMUT includes:
  • a base 41, the base 41 is provided with a groove; the piezoelectric layer 42 is disposed in the groove, and a cavity 43 is formed between the piezoelectric layer 42 and the groove bottom of the groove;
  • the first surface of the piezoelectric layer 42 is provided with a first electrode
  • the second surface of the piezoelectric layer is provided with a second electrode
  • the polarities of the first electrode and the second electrode are opposite
  • An acoustic impedance matching layer 5 is arranged between the electrical layer 42 and the display module 2 .
  • the PMUT sensor is fabricated based on a Micro Electro Mechanical System (MEMS) process, and the entire sensor is arranged under the display module 2 through the acoustic impedance matching layer 5 .
  • the acoustic impedance matching layer 5 is used to connect different materials on both sides of the acoustic impedance matching layer 5, and at the same time, the principle of impedance matching is used to reduce the reflection of ultrasonic waves between different materials.
  • the acoustic impedance matching layer may be a single-layer material, or a combination of multi-layer materials, such as: polyester resin (Polyethylene Terephthalate, PET), polytetrafluoroethylene (Poly Tetra Fluoroethylene, PTFE) and other materials.
  • PET Polyethylene Terephthalate
  • PTFE polytetrafluoroethylene
  • the piezoelectric layer is slightly soft and easily deformed under the action of external force.
  • the piezoelectric layer 42 is a thin film composed of a material with a significant piezoelectric effect. On the one hand, when a voltage signal is applied to both sides of the film, it can produce deformation (inverse piezoelectric effect), and on the other hand, when it is forced to deform, its two sides can be deformed. An electromotive force (piezoelectric effect) is generated.
  • 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 base 41 is usually a concave silicon base, and supports the upper and lower electrodes and the piezoelectric layer 42 between the acoustic impedance matching layer 5 and the base 41 , and a cavity 43 is formed between the base 41 and the piezoelectric layer 42 .
  • the cavity 43 can be filled with gas, because the sound speed of the gas and the solid (lower electrode) is far different, and its acoustic resistance is usually quite different, and the ultrasonic wave will sound totally reflected when it encounters the gas. Based on this, the cavity 43 can reduce the downward leakage of ultrasonic waves, and can also superimpose the emitted ultrasonic waves on the upward emission signal, so as to enhance the emission energy and improve the energy conversion efficiency.
  • the piezoelectric layer 42 When the external circuit applies a suitable electrical signal between the upper and lower electrodes, the piezoelectric layer 42 will deform (as shown by the dotted line in FIG. 2 ) and generate ultrasonic waves. The ultrasonic waves continue to propagate to the display under the coupling effect of the acoustic impedance matching layer. in module 2.
  • the PMUT array is covered by the acoustic impedance matching layer 5, and the PMUT array is divided into at least two regions: a first region and a second region.
  • the display module 2 is covered above the PMUT array in the first area.
  • the first area of the PMUT array and the display module 2 are covered with an acoustic impedance matching layer 5 and are in close contact.
  • the PMUT array in the second area is covered with an acoustic impedance matching layer 5, which corresponds to the non-display area of the display module, and the non-display area is provided with through holes, so one side of the acoustic impedance matching layer 5 is in close contact with the PMUT array, and the other side is in close contact with the PMUT array. One side is in contact with the outside air.
  • the PMUT array includes a plurality of PMUT units.
  • the PMUT unit located in the first area in FIG. 3 transmits and receives ultrasonic waves, and can collect fingerprint images on the outer side of the display module 2 .
  • the piezoelectric layer 42 of the PMUT deforms and squeezes the acoustic impedance matching layer 5 to deform, because the piezoelectric layer 42, the upper electrode, the acoustic impedance matching layer 5. Closely fit, the deformation of the piezoelectric layer 42 will excite the ultrasonic waves of the corresponding frequency.
  • the ultrasonic wave continues to propagate to the display module side through the acoustic impedance matching layer.
  • a finger 6 is pressed on the surface of the display module 2
  • 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 penetrate between the air and the display module.
  • Total reflection (emission wave) occurs at the interface of the display module.
  • the reflected ultrasonic waves will no longer be uniformly distributed in space, but correspond to the pattern formed by the fingerprint valleys.
  • the transmitted wave is received by the PMUT array.
  • the reflected wave energy at the fingerprint ridge is small, which will generate a weaker electromotive force in the corresponding PMUT unit. the electromotive force. In this way, the electromotive force distribution of the PMUT array can form a fingerprint pattern.
  • the PMUT unit located in the second area in Figure 3 has two working modes: the first working mode transmits ultrasonic waves, and uses air to demodulate coherent waves to obtain acoustic wave signals in the range of 20Hz ⁇ 20KHz, which are used as receivers; the second working mode receives 20Hz ⁇ 20KHz A range of sonic signals, used as pickups.
  • the second functional area includes at least two PMUTs; when the sensing module is in the first working mode, the PMUTs in the second functional area emit ultrasonic signals of at least two frequencies.
  • the inductive module that realizes the function of the receiver may be one, that is, through a plurality of PMUTs of one inductive module, ultrasonic signals of different frequencies are emitted to realize intermodulation sound.
  • the induction module including four PMUTs as an example, wherein, the PMUTs of pixel 1 and pixel 2 are the first area, and the PMUTs of vulgar 3 and pixel 4 are the second area.
  • the sensing module works in the first working mode through the second functional area
  • the PMUT in the second area in FIG. 3 will transmit ultrasonic signals, and the ultrasonic signals have at least two frequencies: the first frequency f1, the first frequency f1, the second frequency Second frequency f2.
  • the frequency of ultrasonic waves emitted by the PMUT of pixel 3 is f1
  • the frequency of ultrasonic waves emitted by the PMUT of pixel 4 is f2.
  • f1 and f2 will interact and self-demodulate, resulting in the difference frequency (f1-f2) and the sum frequency ( f1+f2) signal.
  • the sum-frequency signal (f1+f2) is ultrasonic and cannot be heard by the human ear. If the difference frequency signal (f1-f2) falls within the range of 20Hz to 20KHz, it can be heard by human ears.
  • the voice signal can be modulated on f1 and f2 in advance, and the voice signal can be restored through the difference frequency (f1-f2) signal, so as to realize the directional propagation of the voice signal. As shown in Figure 4.
  • the electronic device includes at least two induction modules; when the at least two induction modules are in the first working mode, the at least two induction modules transmit ultrasonic signals of at least two frequencies.
  • the first induction module transmits an ultrasonic signal with a frequency of the first frequency f1
  • the second induction module transmits an ultrasonic signal with a frequency of the first frequency f1.
  • the voice signal can be modulated on f1 and f2 in advance, and the voice signal can be restored through the difference frequency (f1-f2) signal, so as to realize the directional propagation of the voice signal. As shown in Figure 4.
  • the second functional area includes at least two PMUTs, wherein a part of the PMUTs in the at least two PMUTs work in the first working mode, and another part of the PMUTs in the at least two PMUTs work in all the PMUTs.
  • the second working mode is described.
  • the PMUT in the second area in FIG. 3 will receive a voice signal. It should be noted that the frequency of the voice signal is low and the ultrasonic signal is high. Whether the PMUT transmits or receives sound waves, it responds based on its resonant frequency. In the vicinity of the resonance frequency of the PMUT, the transduction efficiency of transmission and reception is the highest, that is, the most sensitive.
  • the resonance frequency of the PMUT is related to the material, area, and thickness of the piezoelectric layer, as well as the cavity volume of the PMUT.
  • PMUTs of various specifications can be designed, such as: the first type of PMUT only works in the first operating mode, and its resonance frequency is higher; The PMUT-like only works in the second working mode, and its resonance frequency is low, which can respond to the voice signal.
  • the sound wave will pass through the acoustic impedance matching layer to reach the PMUT array.
  • At least part of the PMUT (such as the second type of PMUT) can sense the sound wave energy of the person's speech, which can be converted into electricity under the action of the piezoelectric effect. Signal.
  • the principle is the same as that of the PMUT receiving ultrasonic signals, but the frequency is different, and the specific principle will not be repeated.
  • the PMUT array is divided into at least two areas, wherein the first area of the PMUT array is used as the first functional area to implement the fingerprint identification function; the second area of the PMUT array is used as the second functional area,
  • the induction module composed of PMUT array can have at least three functions: fingerprint recognition, receiver, and pickup. Because PMUT is made based on MEMS process, its thickness can be made relatively thin (below 1mm), which greatly reduces the thickness of electronic equipment compared with traditional receivers and pickups.
  • 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 is located at the location.
  • the first target area of the display module 2; the orthographic projection of the second sensing module 310 of the two sensing modules on the plane where the display module 2 is located is located in the second target area of the display module 2 ;
  • the first target area and the second target area are respectively located at opposite ends of the display module.
  • the first target area and the second target area may be the areas of the display module 2 near the top and bottom of the electronic device, respectively.
  • 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 of the second sensing module 310 32 is located close to the bottom frame of the electronic device, so that the second functional area of the first sensing module 300 can work in the first working mode as a receiver; the second sensing module 310
  • the second functional area can work in the second working mode, as a pickup; the first functional area 31 of the first induction module 300 and the first functional area 31 of the second induction module 310 can be used For fingerprint identification, in this way, under the display module, the functions of fingerprint identification, pickup and receiver can be realized at the same time.
  • the electronic device further includes a detection module and a control module connected to the detection module, the detection module is used to detect the relative position between the first target area and the second target area; the The control module is connected with the induction module, and the control module is used to control the second functional area of the first induction module according to the relative position between the first target area and the second target area The working mode and the working mode of the second functional area of the second sensing module.
  • control module is used 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 realize fingerprint recognition and sound pickup. , receiver three functions.
  • the second functional area of the first sensing module when the first target area is located above the second target area, the second functional area of the first sensing module is in the first working mode, and the second sensing module The second functional area of is the 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 the second working mode, the first The second functional area of the two sensing modules is the 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, and the like of the second target area.
  • the control module detects that the first target area is located above the gravity direction of the second target area (that is, the first target area is close to the human ear) , the second target area is close to the user's mouth)
  • control the second functional area of the first sensing module to be the first working mode, so that it realizes the receiver function, and controls the second sensing module.
  • the second functional area is the second working mode, so that it can realize the pickup function.
  • the The second functional area of the first induction module is the second working mode, which realizes the pickup function; the second functional area of the second induction module is the first working mode, which realizes the receiver function.
  • the electronic device further includes a second detection module, the second detection module is connected to the control module, and the second detection module is used to detect the sound source and the first target area and the second detection module.
  • the relative position of the target area the control module is connected to the induction module, and the control module is used to control the relative position between the sound source and the first target area and the second target area.
  • the area close to the sound source can be controlled to work in the second working mode to realize the sound pickup function; the area farther away from the sound source can be controlled to work in the first working mode , to realize the call function.
  • the detection module determines that the sound source is closer to the second target area according to the strength of the sound signal (that is, the sound signal is stronger), and the distance between the sound source and the first target area is farther (that is, the sound signal is weaker) ), it is considered that the first target area is close to the human ear at this time, and the second target area is close to the position of the user's mouth, then the second functional area of the first sensing module is controlled to be the first working mode, so that its The receiver function is realized, and the second function area of the second induction module is controlled to be the second working mode, so that it realizes the pickup function.
  • the detection module determines that the sound source is closer to the first target area according to the strength of the sound signal, and the distance between the sound source and the second target area is farther, and it is considered that the second target area is close to people at this time.
  • the first target area is close to the user's mouth, then the second function area of the first sensing module is controlled to be the second working mode to realize the pickup function; the second function of the second sensing module is controlled
  • the area is the first working mode, which realizes the function of the receiver.
  • each sensing module is composed of a PMUT array, that is, the electronic device has two PMUT arrays, both of which satisfy the above-mentioned characteristics of the PMUT array.
  • the first PMUT array (ie the first sensing module 300 ) is arranged on the top of the electronic device
  • the second PMUT array ie the second sensing module 310 is arranged at the bottom of the electronic device
  • the first area of the two is All are located under the screen, and the second areas are all communicated with the air through the acoustic impedance matching layer.
  • the first PMUT array faces upwards (closer to the human ear) and the second PMUT array faces downwards (closer to the human mouth).
  • the second area of the first PMUT array works in the first working mode, which is used for directional sound, and plays the role of a receiver; the first area of the second PMUT array is used for fingerprint recognition, and realizes functions such as unlocking and payment.
  • the second area of the two PMUT arrays works in the second working mode, and is used to pick up the voice of a person speaking and act as a pickup.
  • the second PMUT array faces up (closer to the person's ear) and the first PMUT array faces down (closer to the person's mouth).
  • the second area of the second PMUT array works in the first working mode, which is used for directional sound, and plays the role of a receiver; the first area of the first PMUT array is used for fingerprint recognition, and realizes functions such as unlocking and payment.
  • the second area of a PMUT array works in the second working mode, and is used to pick up the voice of a person speaking and play the role of a sound pickup.
  • the fingerprint identification, receiver, and pickup on the original electronic device can be replaced, and automatic adaptation of forward grip and inverted grip can be easily realized, improving user experience.
  • sensing modules are arranged on the inner side of the display module, each sensing module has two functional areas, and the first functional area is used to collect fingerprint information on the outer side of the display module to realize the fingerprint recognition function
  • the induction module can realize two working modes through the second functional area, output ultrasonic signals in the first working mode to realize the function of receiving a call, and receive the sound wave signal in the second working mode to realize the sound pickup function.
  • multiple functions such as fingerprint recognition, receiver and pickup can be realized, which can reduce the thickness of electronic equipment, and the electronic equipment can cancel the sound pickup hole, realize sound pickup under the screen, and avoid problems such as liquid and dust entering the sound pickup hole. Affects the pickup function.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Security & Cryptography (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
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Abstract

本申请公开了一种电子设备，包括：壳体；显示模组，显示模组与壳体围合形成容纳腔；感应模组，感应模组位于容纳腔内，至少部分感应模组设置于显示模组的内侧面，且与显示模组的内侧面贴合连接；每个感应模组包括第一功能区域和第二功能区域，第一功能区域与显示模组的指纹采集区域相对分布，以采集所述显示模组的外侧面的指纹信息；第二功能区域为声学区域，在感应模组处于第一工作模式时，感应模组通过第二功能区域输出超声波信号；在感应模组处于第二工作模式时，感应模组通过第二功能区域接收声波信号，以及将声波信号转换为电信号。

Description

一种电子设备
相关申请的交叉引用
本申请主张在2020年12月07日在中国提交的中国专利申请No.202011430895.4的优先权，其全部内容通过引用包含于此。
技术领域
本申请涉及通信技术领域，尤其涉及一种电子设备。
背景技术
随着电子设备的种类增多，智能终端的功能越来越强大，对于终端的可靠性的要求也越来越严苛。由于终端的轻薄化以及全屏化要求，终端的厚度越来越薄、且屏幕上设置的开孔越来越少，使得终端集成更多的功能变得困难。以通话功能为例，智能终端通常具有独立的受话器、拾音器，这些部件功能单一但是体积较大，占用终端的内部空间较大，对结构堆叠的约束较强。
发明内容
本申请旨在提供一种电子设备，用以解决独立的功能部件占用电子设备内部空间较大的问题。
第一方面，本申请实施例提供了一种电子设备，包括：
壳体；
显示模组，所述显示模组与所述壳体围合形成容纳腔；
感应模组，所述感应模组位于所述容纳腔内，至少部分所述感应模组设置于所述显示模组的内侧面，且与所述显示模组的内侧面贴合连接；
每个所述感应模组包括第一功能区域和第二功能区域，所述第一功能区域与所述显示模组的指纹采集区域相对分布，以采集所述显示模组的外侧面的指纹信息；
所述第二功能区域为声学区域，在所述感应模组处于第一工作模式的情 况下，所述感应模组通过所述第二功能区域输出超声波信号；在所述感应模组处于第二工作模式的情况下，所述感应模组通过所述第二功能区域接收声波信号，以及将所述声波信号转换为电信号。
这样，本申请的上述方案，在显示模组的内侧面设置感应模组，每个感应模组具有两个功能区域，第一功能区域用于采集显示模组的外侧面的指纹信息，实现指纹识别功能；所述感应模组可以通过第二功能区域实现两种工作模式，在第一工作模式时输出超声波信号，实现受话功能，在第二工作模式接收声波信号，实现拾音功能，该电子设备通过感应模组能够实现指纹识别、受话器以及拾音器等多个功能，能够降低电子设备厚度，且电子设备可以取消拾音孔，实现屏下拾音，避免拾音孔的进液、进尘等问题影响拾音功能。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1表示本申请实施例的电子设备的结构示意图之一；
图2表示本申请实施例的压电超声波换能器PMUT的结构示意图；
图3表示本申请实施例的PMUT阵列的示意图；
图4表示语音信号的自解调的示意图；
图5表示本申请实施例的电子设备的结构示意图之二。
具体实施方式
下面将详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明， 而不能理解为对本发明的限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
下面结合描述根据本发明实施例的电子设备。
如图1所示，所述电子设备包括：壳体1；
显示模组2，所述显示模组2与所述壳体1围合形成容纳腔；
感应模组3，所述感应模组3位于所述容纳腔内，至少部分所述感应模组3设置于所述显示模组2的内侧面，且与所述显示模组2的内侧面贴合连接；
每个所述感应模组3包括第一功能区域和第二功能区域，所述第一功能区域31与所述显示模组2的指纹采集区域相对分布，以采集所述显示模组的外侧面的指纹信息；所述第二功能区域32为声学区域，在所述感应模组3处 于第一工作模式的情况下，所述感应模组3通过所述第二功能区域32输出超声波信号；在所述感应模组3处于第二工作模式的情况下，所述感应模组3通过所述第二功能区域32接收声波信号，以及将所述声波信号转换为电信号。
所述显示模组2可以为所述电子设备的显示屏，在所述显示模组2朝向所述电子设备内部的表面，设置有所述感应模组3，所述感应模组3至少部分设置在所述显示模组2的内表面，且所述感应模组3贴合在所述显示模组3的内侧面。其中，所述感应模组3还可以部分设置在所述显示模组2对应的区域之外，即所述显示模组2可以不完全覆盖所述感应模组3。
所述电子设备可以包括至少两个所述感应模组3，每个所述感应模组3均具有第一功能区域31和第二功能区域32两个功能区域，其中，第一功能区域31可以设置在所述显示模组2的指纹采集区域对应的位置下方，用于进行指纹识别，即位于所述第一功能区域31的所述感应模组3采集所述显示模组2外侧面的指纹信息，从而进行指纹识别。
第二功能区域32可以用做拾音器或者受话器，即所述感应模组通过所述第二功能区域32可以实现两种工作模式，第一工作模式为将电信号转换为超声波信号，并输出至空气中，从而实现受话器功能；第二工作模式将外界环境传输的声波信号转换为电信号，从而进行存储或者传输至其他电子设备，从而实现拾音器功能。
本申请的实施例，在显示模组的内侧面设置感应模组，每个感应模组具有两个功能区域，第一功能区域用于采集显示模组的外侧面的指纹信息，实现指纹识别功能；所述感应模组可以通过第二功能区域实现两种工作模式，在第一工作模式时输出超声波信号，实现受话功能，在第二工作模式接收声波信号，实现拾音功能，该电子设备通过感应模组能够实现指纹识别、受话器以及拾音器等多个功能，能够降低电子设备厚度，且电子设备可以取消拾音孔，实现屏下拾音，避免拾音孔的进液、进尘等问题影响拾音功能。
可选地，所述第一功能区域31在所述显示模组2所在平面的正投影位于所述显示模组2的显示区域；所述第二功能区域32在所述显示模组2所在平 面的正投影位于所述显示模组2的非显示区域。
其中，所述显示区域为所述显示模组上能够显示图像的区域，所述非显示区域为所述显示模组上不显示图像的区域，例如所述电子设备正面顶部的听筒区域、底部的靠近边框的区域等。将所述第二功能区域32设置在所述显示模组2的非显示区域下方，能够减小所述第二功能区域32占用的显示模组的面积，节省电子设备内部空间。将所述第一功能区域31设置在所述显示模组的显示区域下方，有利于指纹识别时用户的操作，例如：将所述第一功能区域31设置在显示屏的中间靠近下边框的区域，符合用户手握终端时指纹识别的操作习惯。
进一步地，所述显示模组的非显示区域具有第一通孔，或者，所述壳体开设有第一通孔；在所述第一通孔的轴线方向上，所述第二功能区域与所述第一通孔至少部分相对，也即所述第二功能区域在所述显示模组所在平面的正投影与所述第一通孔至少部分重叠。
由于所述第二功能区域32用于实现受话器或者拾音器的功能，为了保证超声波信号传出至外界空气中，需要使所述第二功能区域至少部分不被覆盖，则可以在与所述第二功能区域32对应的显示模组2的位置开设通孔，将所述第二功能区域32设置在所述通孔下方；或者，在所述电子设备的壳体上开设通孔，使所述第二功能区域至少部分位于所述通孔下方，以保证超声波信号顺利传出。
具体地，所述感应模组可以包括至少两个压电超声波换能器(Piezoelectric Micromachined Ultrasonic Transducer，PMUT)，所述至少两个压电超声波换能器PMUT间隔排列形成PMUT阵列；所述PMUT阵列的第一区域为所述第一功能区域，所述PMUT阵列的第二区域为所述第二功能区域。该实施例中，每个所述感应模组均由PMUT阵列构成，PMUT阵列的多个PMUT被划分为至少两个区域，其中的第一区域用于作为所述第一功能区域，即第一区域的PMUT传感器用于实现指纹识别；第二区域用于作为所述第二功能区域，即第二区域的PMUT传感器用于实现拾音器或者受话器功能。
如图2所示，所述压电超声波换能器PMUT包括：
基底41，所述基底41设有凹槽；压电层42，设置在所述凹槽内，且所述压电层42与所述凹槽的槽底之间具有空腔43；
所述压电层42的第一表面设有第一电极，所述压电层的第二表面设有第二电极，所述第一电极和所述第二电极的极性相反；所述压电层42与所述显示模组2之间设有声阻匹配层5。
PMUT传感器基于微机电系统(Micro Electro Mechanical System，MEMS)工艺制作，整个传感器通过声阻匹配层5布置在显示模组2下方。声阻匹配层5用于将声阻匹配层5两侧的不同材料连接起来，同时利用阻抗匹配的原理减小不同材料之间超声波的反射。声阻匹配层可能是单层材料，也可以是多层材料的组合，如：涤纶树脂(Polyethylene Terephthalate，PET)、聚四氟乙烯(Poly Tetra Fluoroethylene，PTFE)等材料。通常，压电层质地略柔软，在外力作用下容易产生形变。
压电层42是具有显著压电效应的材料构成的薄膜，一方面在其两侧施加电压信号时能够产生形变(逆压电效应)，另一方面当其被迫产生形变时其两侧能产生电动势(压电效应)。压电层上下表面涂覆有薄膜电极，上电极位于压电层42与声阻匹配层5之间。
基底41通常为凹状硅基，将上下电极、压电层42支撑在声阻匹配层5与基底41之间，基底41与压电层42之间构成空腔43。空腔43内可以填充气体，因为气体与固体(下电极)的声速相差甚远，其声阻通常也差异较大，超声波在遇到气体时会发声全反射。基于此，空腔43可以减少超声波向下方泄漏，还可以将发射的超声波叠加在向上的发射信号上，增强发射能量，提高换能效率。
当外部电路在上下电极之间施加合适的电信号时，压电层42会发生形变(如图2中虚线所示)并产生超声波，超声波在声阻匹配层的耦合作用下，继续传播到显示模组2中。
如图3所示，PMUT阵列被声阻匹配层5覆盖，所述PMUT阵列被划分 为至少两个区域：第一区域和第二区域。第一区域PMUT阵列上方覆盖有显示模组2，对应所述显示模组2的显示区域，PMUT阵列的第一区域与显示模组2之间覆盖有声阻匹配层5且紧密接触。第二区域PMUT阵列上方覆盖有声阻匹配层5，对应所述显示模组的非显示区域，且所述非显示区域开设有通孔，因此声阻匹配层5一侧与PMUT阵列紧密接触，另一侧与外界空气接触。
PMUT阵列包括多个PMUT单元，位于图3中第一区域的PMUT单元发射、接收超声波，可采集显示模组2外侧面的指纹图像。当系统向PMUT单元施加一定频率(通常对应超声波频段)的电信号时，PMUT的压电层42发生形变并挤压声阻匹配层5形变，因为压电层42、上电极、声阻匹配层5紧密贴合，压电层42的形变将激发对应频率的超声波。超声波通过声阻匹配层向显示模组侧继续传播。此时，若显示模组2表面有手指6按压，则指纹脊处的超声波绝大部分将被皮肤吸收(透射波)，而指纹谷因为与显示模组之间有空气，超声波将在空气与显示模组交界处发生全反射(发射波)。反射回来的超声波在空间上将不再均匀分布，而是与指纹谷形成的图案对应。发射波被PMUT阵列接收，由于压电效应，指纹脊处的反射波能量较小将在对应的PMUT单元产生较弱的电动势，指纹谷处的反射波能量较大在对应的PMUT单元产生较强的电动势。如此，PMUT阵列的电动势分布，即可形成指纹图案。
位于图3中第二区域的PMUT单元有两种工作模式：第一工作模式发射超声波，利用空气解调相干波得到20Hz～20KHz范围的声波信号，用作受话器；第二工作模式接收20Hz～20KHz范围的声波信号，用作拾音器。
可选地，所述第二功能区域包括至少两个PMUT；在所述感应模组处于第一工作模式的情况下，所述第二功能区域的PMUT发射至少两个频率的超声波信号。
实现受话器功能的所述感应模组可以为一个，即通过一个感应模组的多个PMUT发射不同频率的超声波信号，实现交调发声。如图3所示，以所述 感应模组包括四个PMUT为例，其中，像素1和像素2的PMUT为第一区域，低俗3和像素4的PMUT为第二区域。在所述感应模组通过所述第二功能区域工作在第一工作模式时，图3中第二区域的PMUT会发射超声波信号，且超声波信号的频率至少有两种：第一频率f1、第二频率f2。
以图3中的像素3、4对应的PMUT单元为例，假设像素3的PMUT发射的超声波频率为f1、像素4的PMUT发射的超声波频率为f2。则当像素3、4同时发射超声波时，超声波会透过声阻匹配层5到达空气中，因为声阻匹配层5将大大削弱该层与空气层交界处的反射，绝大部分的超声波是可以进入空气中的。两组频率为f1、f2的超声波在空气中传播，由于空气具有自解调效应，f1、f2会发生交互作用和自解调现象，产生原超声波的差频(f1-f2)与和频(f1+f2)信号。和频信号(f1+f2)是超声波，人耳听不见。若差频信号(f1-f2)落在20Hz～20KHz范围内，则可以被人耳听见。可以事先将语音信号调制在f1、f2上，则可以通过差频(f1-f2)信号还原出语音信号，实现语音信号的定向传播。如图4所示。
作为一个可选实施例，实现受话器功能的所述感应模组也可以为至少两个，例如通过两个感应模组分别发射不同频率的超声波信号，实现交调发声。具体地，所述电子设备包括至少两个感应模组；在所述至少两个感应模组处于第一工作模式的情况下，所述至少两个感应模组发射至少两个频率的超声波信号。
在两个所述感应模组通过各自的第二功能区域工作在第一工作模式时，第一个感应模组发射频率为第一频率f1的超声波信号，第二个感应模组发射频率为第二频率f2的超声波信号。则两个感应模组同时发射超声波信号时，超声波信号到达空气中。两组频率为f1、f2的超声波信号在空气中传播，发生交互作用和自解调现象，产生原超声波的差频(f1-f2)与和频(f1+f2)信号。若差频信号(f1-f2)落在20Hz～20KHz范围内，则可以被人耳听见。因此可以事先将语音信号调制在f1、f2上，则可以通过差频(f1-f2)信号还原出语音信号，实现语音信号的定向传播。如图4所示。
可选地，所述第二功能区域包括至少两个PMUT，所述至少两个PMUT中的其中一部分PMUT工作在所述第一工作模式，所述至少两个PMUT中的另一部分PMUT工作在所述第二工作模式。
在所述感应模组通过所述第二功能区域工作在第二工作模式时，图3中的第二区域的PMUT会接收语音信号。需要说明的是，语音信号频率较低，超声波信号较高，PMUT无论是发射还是接收声波，都是基于其谐振频率的响应。在PMUT的谐振频点附近，发射、接收的换能效率最高，即最敏感。PMUT的谐振频点跟压电层的材质、面积、厚度都有关系，还与PMUT的空腔容积有关。所以，在第二区域的多个PMUT中，为了实现两种工作模式，可以设计多种规格的PMUT，如：第一类PMUT只工作在第一工作模式，其谐振频点较高；第二类PMUT只工作在第二工作模式，其谐振频点较低，可响应语音信号。当PMUT阵列附近有人讲话时，声波会穿过声阻匹配层到达PMUT阵列，至少部分(如：第二类PMUT)PMUT可以感应到人讲话的声波能量，在压电效应作用下可转换成电信号。该原理与PMUT接收超声波信号相同，只是频率不同，具体原理不做赘述。
该实施例中，PMUT阵列被划分为至少两个区域，其中，PMUT阵列的第一区域作为所述第一功能区域，实现指纹识别功能；PMUT阵列的第二区域作为所述第二功能区域，实现受话或者拾音功能，则由PMUT阵列构成的感应模组至少可以具备三种功能：指纹识别、受话器、拾音器。因为PMUT是基于MEMS工艺做成的，其厚度可以做到比较薄(1mm以下)，相比于传统的受话器、拾音器，大大降低了电子设备厚度。
可选地，如图5所示，所述感应模组3为两个，两个所述感应模组3中的第一感应模组300在所述显示模组2所在平面的正投影位于所述显示模组2的第一目标区域；两个所述感应模组中的第二感应模组310在所述显示模组2所在平面的正投影位于所述显示模组2的第二目标区域；所述第一目标区域和所述第二目标区域分别位于所述显示模组相对的两端。
该实施例中，所述第一目标区域和所述第二目标区域可以分别为所述显 示模组2靠近电子设备的顶端和底端的区域。以所述第一目标区域为所述显示模组2靠近电子设备顶端的区域、所述第二目标区域为所述显示模组2靠近所述电子设备底端的区域为例，在所述第一目标区域，所述第一感应模组300的第二功能区域32位于靠近所述电子设备的顶端边框的位置；在所述第二目标区域，所述第二感应模组310的第二功能区域32位于靠近所述电子设备的底端边框的位置，这样，所述第一感应模组300的第二功能区域可以工作在所述第一工作模式，做受话器；所述第二感应模组310的第二功能区域可以工作在所述第二工作模式，做拾音器；所述第一感应模组300的第一功能区域31和所述第二感应模组310的第一功能区域31均可以用于指纹识别，这样，在所述显示模组的下方，可以同时实现指纹识别、拾音器、受话器功能。
可选地，所述电子设备还包括检测模块以及与所述检测模块连接的控制模块，所述检测模块用于检测所述第一目标区域和所述第二目标区域之间的相对位置；所述控制模块与所述感应模组连接，所述控制模块用于根据所述第一目标区域和所述第二目标区域之间的相对位置，控制所述第一感应模组的第二功能区域工作模式以及第二感应模组的第二功能区域的工作模式。
该实施例中，所述控制模块用于控制所述第一感应模组的第二功能区域以及第二感应模组的第二功能区域的工作模式，以使电子设备能够同时实现指纹识别、拾音器、受话器三种功能。
具体地，在重力方向上，所述第一目标区域位于所述第二目标区域的上方时，所述第一感应模组的第二功能区域为第一工作模式，所述第二感应模组的第二功能区域为第二工作模式；在所述第一目标区域位于所述第二目标区域的下方时，所述第一感应模组的第二功能区域为第二工作模式，所述第二感应模组的第二功能区域为第一工作模式。
所述第一目标区域和所述第二目标区域的相对位置可以包括：所述第一目标区域位于所述第二目标区域的上方、下方、左方、右方等。为了便于用户在通话时能够同时实现受话器和拾音器功能，所述控制模块在检测到所述 第一目标区域位于所述第二目标区域重力方向的上方时(即所述第一目标区域靠近人耳，所述第二目标区域靠近用户嘴巴的位置)，控制所述第一感应模组的第二功能区域为第一工作模式，以使其实现受话器功能，并且控制所述第二感应模组的第二功能区域为第二工作模式，以使其实现拾音器功能。相反地，在所述第一目标区域位于所述第二目标区域重力方向上的下方时(即所述第二目标区域靠近人耳，所述第一目标区域靠近用户嘴巴的位置)，所述第一感应模组的第二功能区域为第二工作模式，实现拾音器功能；所述第二感应模组的第二功能区域为第一工作模式，实现受话器功能。
可选地，所述电子设备还包括第二检测模块，所述第二检测模块与控制模块连接，所述第二检测模块用于检测发声声源与所述第一目标区域和所述第二目标区域的相对的位置，所述控制模块与所述感应模组连接，所述控制模块用于根据所述发声声源与第一目标区域和所述第二目标区域之间的相对位置，控制所述第一感应模组的第二功能区域工作模式以及第二感应模组的第二功能区域的工作模式。
具体地，可以控制与所述发声声源距离较近的区域工作在所述第二工作模式，实现拾音功能；控制与所述发声声源距离较远的区域工作在所述第一工作模式，实现受话功能。例如：检测模块根据声音信号的强度确定发声声源与所述第二目标区域较为接近(即声音信号较强)，发声声源与所述第一目标区域的距离较远(即声音信号较弱)，认为此时所述第一目标区域靠近人耳，所述第二目标区域靠近用户嘴巴的位置，则控制所述第一感应模组的第二功能区域为第一工作模式，以使其实现受话器功能，并且控制所述第二感应模组的第二功能区域为第二工作模式，以使其实现拾音器功能。
相反地，检测模块根据声音信号的强度确定发声声源与所述第一目标区域较为接近，发声声源与所述第二目标区域的距离较远，认为此时所述第二目标区域靠近人耳，所述第一目标区域靠近用户嘴巴的位置，则控制所述第一感应模组的第二功能区域为第二工作模式，实现拾音器功能；控制所述第二感应模组的第二功能区域为第一工作模式，实现受话器功能。
以所述电子设备包括两个感应模组为例，如图5所示，每个感应模组由PMUT阵列构成，即所述电子设备具有两个PMUT阵列，都满足上述PMUT阵列的特征。
其中，第一PMUT阵列(即所述第一感应模组300)布置在电子设备顶部，第二PMUT阵列(即所述第二感应模组310)布置在电子设备底部，两者的第一区域均位于屏下，第二区域均通过声阻匹配层与空气连通。正常使用情况下，第一PMUT阵列朝上(靠近人耳朵)，第二PMUT阵列朝下(靠近人嘴巴)。此时，第一PMUT阵列的第二区域工作于第一工作模式，用于定向发声，起到受话器的作用；第二PMUT阵列的第一区域用于指纹识别，实现解锁、支付等功能，第二PMUT阵列的第二区域工作于第二工作模式，用于拾取人讲话的声音，起到拾音器的作用。
当用户将电子设备倒过来握持时，第二PMUT阵列朝上(靠近人耳朵)，第一PMUT阵列朝下(靠近人嘴巴)。此时，第二PMUT阵列的第二区域工作于第一工作模式，用于定向发声，起到受话器的作用；第一PMUT阵列的第一区域用于指纹识别，实现解锁、支付等功能，第一PMUT阵列的第二区域工作于第二工作模式，用于拾取人讲话的声音，起到拾音器的作用。
如此，通过两个PMUT阵列，可以取代原电子设备上的指纹识别、受话器、拾音器，并能够方便实现正向握持、倒置握持的自动适配，提高用户体验。
本申请的实施例，在显示模组的内侧面设置感应模组，每个感应模组具有两个功能区域，第一功能区域用于采集显示模组的外侧面的指纹信息，实现指纹识别功能；所述感应模组可以通过第二功能区域实现两种工作模式，在第一工作模式时输出超声波信号，实现受话功能，在第二工作模式接收声波信号，实现拾音功能，该电子设备通过感应模组能够实现指纹识别、受话器以及拾音器等多个功能，能够降低电子设备厚度，且电子设备可以取消拾音孔，实现屏下拾音，避免拾音孔的进液、进尘等问题影响拾音功能。
根据本发明实施例的电子设备的其他构成例如显示模组和壳体等以及操 作对于本领域普通技术人员而言都是已知的，这里不再详细描述。在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (11)

  1. 一种电子设备，包括：
    壳体；
    显示模组，所述显示模组与所述壳体围合形成容纳腔；
    感应模组，所述感应模组位于所述容纳腔内，至少部分所述感应模组设置于所述显示模组的内侧面，且与所述显示模组的内侧面贴合连接；
    每个所述感应模组包括第一功能区域和第二功能区域，所述第一功能区域与所述显示模组的指纹采集区域相对分布，以采集所述显示模组的外侧面的指纹信息；
    所述第二功能区域为声学区域，在所述感应模组处于第一工作模式的情况下，所述感应模组通过所述第二功能区域输出超声波信号；在所述感应模组处于第二工作模式的情况下，所述感应模组通过所述第二功能区域接收声波信号，以及将所述声波信号转换为电信号。
  2. 根据权利要求1所述的电子设备，其中，所述第一功能区域在所述显示模组所在平面的正投影位于所述显示模组的显示区域；
    所述第二功能区域在所述显示模组所在平面的正投影位于所述显示模组的非显示区域。
  3. 根据权利要求1所述的电子设备，其中，所述显示模组的非显示区域具有第一通孔，或者，所述壳体开设有第一通孔；
    在所述第一通孔的轴线方向上，所述第二功能区域与所述第一通孔至少部分相对。
  4. 根据权利要求1所述的电子设备，其中，所述感应模组包括至少两个压电超声波换能器PMUT，所述至少两个压电超声波换能器PMUT间隔排列形成PMUT阵列；
    所述PMUT阵列的第一区域为所述第一功能区域，所述PMUT阵列的第二区域为所述第二功能区域。
  5. 根据权利要求4所述的电子设备，其中，所述压电超声波换能器PMUT包括：
    基底，所述基底设有凹槽；
    压电层，设置在所述凹槽内，且所述压电层与所述凹槽的槽底之间具有空腔；
    所述压电层的第一表面设有第一电极，所述压电层的第二表面设有第二电极，所述第一电极和所述第二电极的极性相反；
    所述压电层与所述显示模组之间设有声阻匹配层。
  6. 根据权利要求4所述的电子设备，其中，所述电子设备包括至少两个感应模组；
    在所述至少两个感应模组处于第一工作模式的情况下，所述至少两个感应模组发射至少两个频率的超声波信号。
  7. 根据权利要求4所述的电子设备，其中，所述第二功能区域包括至少两个PMUT；
    在所述感应模组处于第一工作模式的情况下，所述第二功能区域的PMUT发射至少两个频率的超声波信号。
  8. 根据权利要求4所述的电子设备，其中，所述第二功能区域包括至少两个PMUT，所述至少两个PMUT中的其中一部分PMUT工作在所述第一工作模式，所述至少两个PMUT中的另一部分PMUT工作在第二工作模式。
  9. 根据权利要求1所述的电子设备，其中，所述感应模组为两个，两个所述感应模组中的第一感应模组在所述显示模组所在平面的正投影位于所述显示模组的第一目标区域；
    两个所述感应模组中的第二感应模组在所述显示模组所在平面的正投影位于所述显示模组的第二目标区域；
    所述第一目标区域和所述第二目标区域分别位于所述显示模组相对的两端。
  10. 根据权利要求9所述的电子设备，其中，所述电子设备还包括检测 模块以及与所述检测模块连接的控制模块，所述检测模块用于检测所述第一目标区域和所述第二目标区域之间的相对位置；
    所述控制模块与所述感应模组连接，所述控制模块用于根据所述第一目标区域和所述第二目标区域之间的相对位置，控制所述第一感应模组的第二功能区域工作模式以及第二感应模组的第二功能区域的工作模式。
  11. 根据权利要求10所述的电子设备，其中，在重力方向上，所述第一目标区域位于所述第二目标区域的上方时，所述第一感应模组的第二功能区域为第一工作模式，所述第二感应模组的第二功能区域为第二工作模式；
    所述第一目标区域位于所述第二目标区域的下方时，所述第一感应模组的第二功能区域为第二工作模式，所述第二感应模组的第二功能区域为第一工作模式。
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