Fingerprint identification module, method and device, display screen assembly, electronic equipment and medium

Abstract

The invention relates to a fingerprint identification module, method and device, electronic equipment and a medium, the fingerprint identification module comprises an ultrasonic wave sending module, an ultrasonic wave receiving module and a driving module, the ultrasonic wave sending module is used for sending a first ultrasonic wave, and the ultrasonic wave sending module comprises at least two ultrasonic wave generating units; the at least two ultrasonic wave generating units have different vibration directions; the ultrasonic receiving module is used for receiving the reflected first ultrasonic waves; the driving module is used for driving the ultrasonic generating units to vibrate so as to generate second ultrasonic waves, and the second ultrasonic waves are superposed to form first ultrasonic waves. By arranging the at least two ultrasonic wave generation units which have different vibration directions, the plurality of second ultrasonic waves can be superposed to form the first ultrasonic wave with a complex waveform, so that ultrasonic wave encryption is realized, and the reliability and safety of user identity verification scenes such as fingerprint acquisition and storage are enhanced; and the user experience is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of fingerprint recognition, and in particular to a fingerprint recognition module, method, device, display screen assembly, electronic device and medium. Background Art

[0002] In recent years, with the development of fingerprint recognition technology, fingerprint recognition has been widely used in scenarios such as fingerprint image collection or encryption of smart electronic devices such as mobile phones, tablets, and laptops to authenticate users and improve the security of using smart electronic devices.

[0003] However, the fingerprint images obtained by the fingerprint recognition technology in the related art have low security and poor user experience. Summary of the invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a fingerprint recognition module, method, device, display screen assembly, electronic device and medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a fingerprint recognition module is provided, the fingerprint recognition module comprising:

[0006] An ultrasonic transmitting module, the ultrasonic transmitting module is used to transmit a first ultrasonic wave, the ultrasonic transmitting module comprises at least two ultrasonic generating units, each of the ultrasonic generating units generates an ultrasonic wave by vibration, and at least two of the ultrasonic generating units have different vibration directions;

[0007] An ultrasonic receiving module, the ultrasonic receiving module is used to receive the first ultrasonic wave after reflection;

[0008] A driving module is connected to each of the ultrasonic wave generating units, and is used to drive each of the ultrasonic wave generating units to vibrate to generate a second ultrasonic wave, and each of the second ultrasonic waves is superimposed to form the first ultrasonic wave.

[0009] In some embodiments of the present disclosure, the ultrasonic wave generating unit comprises:

[0010] Two electrode material layers, each of the electrode material layers is connected to the driving module;

[0011] A piezoelectric material layer is located between the two electrode material layers, and the ultrasonic wave generating unit generates the second ultrasonic wave through the vibration of the piezoelectric material layer.

[0012] In some embodiments of the present disclosure, in each of the ultrasonic generating units, the electrode material layer and the piezoelectric material layer are stacked along a first preset direction, and the piezoelectric material layers of at least two of the ultrasonic generating units have different vibration directions under the same polarization direction; or,

[0013] The piezoelectric material layers have the same vibration direction under the same polarization direction, and in at least two of the ultrasonic generating units, the electrode material layers and the piezoelectric material layers have different stacking directions.

[0014] In some embodiments of the present disclosure, in each of the ultrasonic generating units, the electrode material layer and the piezoelectric material layer are stacked along the first preset direction and each of the ultrasonic generating units is stacked along the first preset direction, and adjacent ultrasonic generating units share one electrode material layer.

[0015] In some embodiments of the present disclosure, the at least two ultrasonic generating units include a first ultrasonic generating unit and a second ultrasonic generating unit, the vibration directions of the first ultrasonic generating unit and the second ultrasonic generating unit are perpendicular to each other, the second ultrasonic waves generated by the first ultrasonic generating unit and the second ultrasonic generating unit both have simple harmonic oscillation waveforms, there is a preset phase difference and a preset frequency ratio between the second ultrasonic waves generated by the first ultrasonic generating unit and the second ultrasonic generating unit, and the first ultrasonic wave formed by the superposition of the second ultrasonic waves generated by the first ultrasonic generating unit and the second ultrasonic generating unit has a Lissajous waveform.

[0016] In some embodiments of the present disclosure, the ultrasonic transmitting module includes a first electrode material layer, a first piezoelectric material layer, a second electrode material layer, a second piezoelectric material layer and a third electrode material layer stacked in sequence, the first electrode material layer, the first piezoelectric material layer and the second electrode material layer constitute a first ultrasonic generating unit, the second electrode material layer, the second piezoelectric material layer and the third electrode material layer constitute the second ultrasonic generating unit, and the vibration directions of the first piezoelectric material layer and the second piezoelectric material layer under the same polarization direction are perpendicular to each other.

[0017] In some embodiments of the present disclosure, the driving module includes a first power supply and a second power supply, the first power supply is respectively connected to the first electrode material layer and the second electrode material layer, and the second power supply is respectively connected to the second electrode material layer and the third electrode material layer.

[0018] In some embodiments of the present disclosure, the ultrasonic sending module includes a third piezoelectric material layer, a fourth electrode material layer, a fourth piezoelectric material layer and a fifth electrode material layer stacked in sequence along a second preset direction, and a sixth electrode material layer and a seventh electrode material layer are respectively arranged on both sides of the third piezoelectric material layer along the third preset direction, and the second preset direction is perpendicular to the third preset direction. The third piezoelectric material layer, the sixth electrode material layer and the seventh electrode material layer constitute the first ultrasonic generating unit, and the fourth electrode material layer, the fourth piezoelectric material layer and the fifth electrode material layer constitute the second ultrasonic generating unit, and the third piezoelectric material layer and the fourth piezoelectric material layer have the same vibration direction under the same polarization direction.

[0019] In some embodiments of the present disclosure, the driving module includes a third power supply and a fourth power supply, the third power supply is respectively connected to the fourth electrode material layer and the fifth electrode material layer, and the fourth power supply is respectively connected to the sixth electrode material layer and the seventh electrode material layer.

[0020] In some embodiments of the present disclosure, the ultrasonic receiving module includes a converse piezoelectric material layer stacked in at least one of the ultrasonic generating units.

[0021] According to a second aspect of an embodiment of the present disclosure, a display screen assembly is provided, which includes a display panel and a fingerprint recognition module as described in the first aspect, wherein the display panel has a fingerprint recognition area, and the fingerprint recognition module is arranged on the back side of the display panel and corresponds to the fingerprint recognition area.

[0022] In some embodiments of the present disclosure, a vibration direction of at least one of the ultrasonic generating units is perpendicular to an outer surface of the display panel.

[0023] In some embodiments of the present disclosure, the piezoelectric material layer of each of the ultrasonic generating units in the fingerprint recognition module is arranged parallel to the outer surface of the display panel, and the ultrasonic receiving module is arranged in the ultrasonic generating unit adjacent to the display panel.

[0024] According to a third aspect of an embodiment of the present disclosure, a fingerprint recognition method is provided, the fingerprint recognition method comprising:

[0025] Receive fingerprint recognition instructions;

[0026] Based on the fingerprint recognition instruction, a control signal is issued, wherein the control signal is used to instruct each ultrasonic wave generating unit in the ultrasonic wave transmitting module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic wave generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave;

[0027] A fingerprint recognition operation is performed according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

[0028] According to a fourth aspect of an embodiment of the present disclosure, a fingerprint recognition device is provided, the fingerprint recognition device comprising:

[0029] A receiving module, the receiving module is used to receive an identification instruction;

[0030] A sending module, the sending module is used to send a control signal based on the fingerprint recognition instruction, the control signal is used to instruct each ultrasonic generating unit in the ultrasonic sending module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave;

[0031] The execution module is used to perform a fingerprint recognition operation according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

[0032] According to a fifth aspect of an embodiment of the present disclosure, an electronic device is provided, wherein the electronic device includes the display screen assembly as described in the second aspect.

[0033] According to a sixth aspect of an embodiment of the present disclosure, an electronic device is provided, the electronic device comprising:

[0034] processor;

[0035] a memory for storing processor-executable instructions;

[0036] Wherein, the processor is configured to:

[0037] Receive fingerprint recognition instructions;

[0038] Based on the fingerprint recognition instruction, a control signal is issued, wherein the control signal is used to instruct each ultrasonic wave generating unit in the ultrasonic wave transmitting module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic wave generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave;

[0039] A fingerprint recognition operation is performed according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

[0040] According to a seventh aspect of an embodiment of the present disclosure, a non-transitory computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform a fingerprint recognition method. The fingerprint recognition method includes:

[0041] Receive fingerprint recognition instructions;

[0042] Based on the fingerprint recognition instruction, a control signal is issued, wherein the control signal is used to instruct each ultrasonic wave generating unit in the ultrasonic wave transmitting module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic wave generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave;

[0043] A fingerprint recognition operation is performed according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

[0044] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by setting an ultrasonic transmitting module and an ultrasonic receiving module, a first ultrasonic wave can be sent and the reflected first ultrasonic wave can be received, and fingerprint recognition is realized based on ultrasonic signals. By setting at least two ultrasonic generating units, and at least two ultrasonic generating units have different vibration directions, each ultrasonic generating unit is driven to vibrate by a driving module to generate a second ultrasonic wave, multiple second ultrasonic waves can be superimposed to form a first ultrasonic wave with a complex waveform, ultrasonic encryption is realized, the reliability and security of user identity authentication scenarios such as collection and storage are enhanced, and the user experience is improved.

[0045] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] Figure 1 is a schematic diagram of a fingerprint recognition module according to an exemplary embodiment.

[0048] Figure 2 is a schematic diagram of a display screen assembly according to an exemplary embodiment.

[0049] Figure 3 is a schematic diagram of a display screen assembly according to another exemplary embodiment.

[0050] Figure 4 is a schematic diagram of an ultrasonic generating unit according to an exemplary embodiment.

[0051] Figure 5 is a schematic diagram of a waveform of a first ultrasonic wave under different preset phase differences and preset frequency ratios according to an exemplary embodiment.

[0052] Figure 6 is a schematic diagram of a waveform of a second ultrasonic wave generated by a first ultrasonic wave generating unit according to an exemplary embodiment.

[0053] Figure 7 is a schematic diagram of a waveform of a second ultrasonic wave generated by a second ultrasonic wave generating unit according to an exemplary embodiment.

[0054] Figure 8 is a schematic diagram of a waveform of a superimposed first ultrasonic wave according to an exemplary embodiment.

[0055] Fig. 9 The figure is a flow chart of a fingerprint recognition method according to an exemplary embodiment.

[0056] Fig.10 is a block diagram of a fingerprint recognition device according to an exemplary embodiment.

[0057] Fig.11 is a block diagram of an electronic device according to an exemplary embodiment.

[0058] In the figure:

[0059] 10-ultrasonic transmitting module; 20-ultrasonic generating unit; 21-electrode material layer; 22-piezoelectric material layer; 30-first ultrasonic generating unit; 31-first electrode material layer; 32-first piezoelectric material layer; 33-second electrode material layer; 34-third piezoelectric material layer; 35-sixth electrode material layer; 36-seventh electrode material layer; 40-second ultrasonic generating unit; 41-second piezoelectric material layer; 42-third electrode material layer; 43-fourth electrode material layer; 44-fourth piezoelectric material layer; 45-fifth piezoelectric material layer Pole material layer; 50-ultrasonic receiving module; 51-inverse piezoelectric material layer; 60-driving module; 61-first power supply; 62-second power supply; 63-third power supply; 64-fourth power supply; 71-receiving module; 72-sending module; 73-execution module; 80-display panel; 101-processing component; 102-memory; 103-power component; 104-multimedia component; 105-audio component; 106-input / output interface; 107-sensor component; 108-communication component; 109-processor. DETAILED DESCRIPTION

[0060] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0061] In related technologies, with the development of fingerprint recognition technology, fingerprint recognition has been widely used in scenarios such as fingerprint image collection or encryption of smart electronic devices such as mobile phones, tablets, and laptops to authenticate users and improve the safety of smart electronic devices. Existing fingerprint recognition usually uses the penetration of ultrasonic waves to penetrate the material covering the fingerprint recognition module and the dermis of the finger skin, and then uses the density difference between the ridges and valleys on the surface of the finger skin to draw a three-dimensional detailed image of the fingerprint.

[0062] However, the fingerprint recognition module of the related art uses a single polarity vibrating piezoelectric material as the transmitting end of the detection ultrasonic wave. The waveform complexity of the generated detection ultrasonic wave is insufficient. The fingerprint image formed by the ultrasonic wave reflected by the finger is the actual fingerprint image of the user, which is not encrypted. This method of collecting and storing fingerprint images in plain text has low security and reliability, and there are problems such as fingerprint recognition being easily interfered with or cracked, resulting in a poor user experience.

[0063] Based on this, the exemplary embodiment of the present disclosure provides a fingerprint recognition module, which can send a first ultrasonic wave and receive the reflected first ultrasonic wave by setting an ultrasonic transmitting module and an ultrasonic receiving module, and realize fingerprint recognition based on ultrasonic signals. By setting at least two ultrasonic generating units, and at least two ultrasonic generating units have different vibration directions, each ultrasonic generating unit is driven to vibrate by a driving module to generate a second ultrasonic wave, so that multiple second ultrasonic waves can be superimposed to form a first ultrasonic wave with a complex waveform, and ultrasonic encryption is realized, which enhances the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improves the user experience.

[0064] In an exemplary embodiment, reference Figure 1 , Figure 2 or Figure 3 As shown, a fingerprint recognition module is provided, which can be applied to any device with fingerprint recognition requirements, for example, in electronic devices with a display panel 80 such as mobile phones. In this case, the fingerprint recognition module can be set on the back of the display panel 80, that is, on the side close to the inner surface of the display panel 80, that is, on the side away from the user when the user faces the outer surface of the display panel (that is, the display surface).

[0065] The fingerprint recognition module includes an ultrasonic transmitting module 10, an ultrasonic receiving module 50 and a driving module 60. The ultrasonic transmitting module 10 is used to transmit a first ultrasonic wave. The ultrasonic transmitting module 10 includes at least two ultrasonic generating units 20. Each ultrasonic generating unit 20 generates an ultrasonic wave by vibration. At least two ultrasonic generating units 20 have different vibration directions. The ultrasonic receiving module 50 is used to receive the reflected first ultrasonic wave. The driving module 60 is connected to each ultrasonic generating unit 20. The driving module 60 is used to drive each ultrasonic generating unit 20 to vibrate to generate a second ultrasonic wave. Each second ultrasonic wave is superimposed to form the first ultrasonic wave. When the fingerprint recognition module is arranged on the back of the display panel 80, the ultrasonic transmitting module 10 transmits the first ultrasonic wave to the fingerprint recognition area of ​​the display panel 80. The fingerprint recognition module can also be arranged side by side with the display panel 80, or the fingerprint recognition module can also be applied to electronic devices without a screen. This embodiment does not limit this.

[0066] The ultrasonic transmitting module 10 is composed of at least two Figure 4 The ultrasonic generating unit 20 shown in the figure is composed of each ultrasonic generating unit 20, and each ultrasonic generating unit 20 can generate ultrasonic waves by vibration. The driving module 60 is connected to each ultrasonic generating unit 20, and the driving module 60 can drive each ultrasonic generating unit 20 to vibrate respectively by, for example, providing an electrical signal to generate a second ultrasonic wave. The second ultrasonic waves generated by the ultrasonic generating units 20 with different vibration directions have different corresponding curve functions in the same preset coordinate system. The preset coordinate system can be any xy coordinate system. For example, when the fingerprint recognition module is set on the back of the display panel 80, the direction perpendicular to the outer surface of the display panel 80 can be used as the y-axis, and any direction parallel to the outer surface of the display panel 80 can be used as the y-axis to form an xy coordinate system. Exemplarily, the curve functions corresponding to the second ultrasonic waves generated by the ultrasonic generating units 20 with different vibration directions in the same preset coordinate system can have different fluctuation directions or frequencies. Under the condition that at least two ultrasonic generating units 20 have different vibration directions, the superposition of each second ultrasonic wave can form a first ultrasonic wave with a more complex waveform than each second ultrasonic wave, thereby realizing the encryption of the first ultrasonic wave as the detection ultrasonic wave.

[0067] The first ultrasonic wave is used as a detection ultrasonic wave for fingerprint identification. The first ultrasonic wave is sent to a target object through an ultrasonic transmitting module 10 composed of ultrasonic generating units 20. The target object may be, for example, a user's finger. The first ultrasonic wave reflected by the target object is received by an ultrasonic receiving module 50. Fingerprint identification information can be determined based on the reflected first ultrasonic wave. The reflected first ultrasonic wave or the determined fingerprint identification information can be correspondingly identified or saved to authenticate the user's identity.

[0068] In this embodiment, by setting an ultrasonic transmitting module 10 and an ultrasonic receiving module 50, a first ultrasonic wave can be sent to a target object and the reflected first ultrasonic wave can be received, thereby realizing fingerprint recognition based on ultrasonic signals. By setting at least two ultrasonic generating units 20, and at least two ultrasonic generating units having different vibration directions, each ultrasonic generating unit 20 is driven to vibrate by a driving module 60 to generate a second ultrasonic wave, so that multiple second ultrasonic waves can be superimposed to form a first ultrasonic wave with a complex waveform, thereby realizing ultrasonic encryption, and thereby making the fingerprint image determined according to the reflected first ultrasonic wave no longer the actual fingerprint image, but encrypted fingerprint information, thereby enhancing the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improving the user experience.

[0069] In some embodiments, reference Figure 4 As shown, the ultrasonic generating unit 20 includes two electrode material layers 21 and a piezoelectric material layer 22, and each electrode material layer 21 is connected to the driving module 60; the piezoelectric material layer 22 is located between the two electrode material layers 21, and the ultrasonic generating unit 20 generates a second ultrasonic wave through the vibration of the piezoelectric material layer 22.

[0070] Among them, each ultrasonic generating unit 20 includes two electrode material layers 21 and one piezoelectric material layer 22, the electrode material layers 21 are arranged on both sides of the piezoelectric material layer 22, and the two electrode material layers 21 are connected to the driving module 60. Under the driving action of the driving module 60, the two electrode material layers 21 provide an electric field for the piezoelectric material layer 22 between the two electrode material layers 21 and polarize the piezoelectric material layer 22.

[0071] The material of the piezoelectric material layer 22 may include, for example, piezoelectric ceramics, piezoelectric crystals, or piezoelectric polymers, and the material of the electrode material layer 21 may include, for example, one or more of gold, silver, copper, platinum, nickel, chromium, aluminum, and titanium. When the piezoelectric material layer 22 between the two electrode material layers 21 is polarized in an electric field, the displacement of the charge center causes the material to deform, thereby generating vibrations in a specific direction, which is determined according to the selection of the polarization direction of the piezoelectric material and the piezoelectric material layer 22, and the second ultrasonic wave is generated by the vibration of the piezoelectric material layer 22, so that the ultrasonic wave generating unit 20 generates the second ultrasonic wave by the vibration of the piezoelectric material layer 22.

[0072] In this embodiment, by setting two electrode material layers 21 and a piezoelectric material layer 22, the two electrode material layers 21 connected to the driving module 60 can provide an electric field for the piezoelectric material layer 22 between the two electrode material layers 21 and polarize the piezoelectric material layer 22, so that the piezoelectric material layer 22 vibrates when polarized in the electric field, and a second ultrasonic wave is generated by the vibration of the piezoelectric material layer 22, thereby realizing that each ultrasonic wave generating unit 20 generates a second ultrasonic wave through vibration, providing a prerequisite for the superposition of multiple second ultrasonic waves, thereby enhancing the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improving the user experience.

[0073] In some embodiments, reference Figure 1 , Figure 2 and Figure 4 As shown, in each ultrasonic generating unit 20, the electrode material layer 21 and the piezoelectric material layer 22 are stacked along a first preset direction, and the piezoelectric material layers 22 of at least two ultrasonic generating units 20 have different vibration directions under the same polarization direction.

[0074] The electrode material layer 21 and the piezoelectric material layer 22 in each ultrasonic generating unit 20 are stacked along a first preset direction. The first preset direction is, for example, Figure 2 The X direction in the figure, that is, the polarization direction of each piezoelectric material layer 22 is the same. The piezoelectric material layers of at least two ultrasonic generating units 20 have different vibration directions under the same polarization direction. For example, the piezoelectric material layers of all ultrasonic generating units 20 may have different vibration directions under the same polarization direction. Since the vibration directions of at least two piezoelectric material layers 22 under the same polarization direction are different, at least two ultrasonic generating units 20 have different vibration directions under this arrangement, so that the second ultrasonic waves generated by each ultrasonic generating unit 20 can be superimposed to form a first ultrasonic wave with a complex waveform.

[0075] In this embodiment, by stacking the electrode material layer 21 and the piezoelectric material layer 22 in each ultrasonic generating unit 20 along a first preset direction, and setting the piezoelectric material layers of at least two ultrasonic generating units 20 to have different vibration directions under the same polarization direction, it is possible to achieve that at least two ultrasonic generating units 20 have different vibration directions, thereby providing the prerequisite for the superposition of multiple second ultrasonic waves, thereby enhancing the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improving the user experience.

[0076] In other embodiments, reference Figure 3 and Figure 4 As shown, the vibration directions of the piezoelectric material layers 22 under the same polarization direction are the same, and in at least two ultrasonic generating units 20, the stacking directions of the electrode material layers 21 and the piezoelectric material layers 22 are different.

[0077] Among them, in at least two ultrasonic generating units 20, the stacking directions of the electrode material layer 21 and the piezoelectric material layer 22 are different, that is, the polarization directions of the piezoelectric material layer 22 in at least two ultrasonic generating units 20 are different. Since the vibration directions of each piezoelectric material layer 22 under the same polarization direction are different, at least two ultrasonic generating units 20 have different vibration directions under this setting, which can make the second ultrasonic wave generated by each ultrasonic generating unit 20 superimposed to form a first ultrasonic wave with a complex waveform.

[0078] In this embodiment, by setting each piezoelectric material layer 22 to have the same vibration direction under the same polarization direction, and setting the electrode material layer 21 and the piezoelectric material layer 22 in at least two ultrasonic generating units 20 to have different stacking directions, it is possible to achieve that at least two ultrasonic generating units 20 have different vibration directions, thereby providing the prerequisite for the superposition of multiple second ultrasonic waves, thereby enhancing the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improving the user experience.

[0079] In some embodiments, reference Figure 1 or Figure 2 As shown, in each ultrasonic generating unit 20 , the electrode material layer 21 and the piezoelectric material layer 22 are stacked along the first preset direction and each ultrasonic generating unit 20 is stacked along the first preset direction, and adjacent ultrasonic generating units 20 share one electrode material layer 21 .

[0080] The first preset direction is, for example, Figure 2 In the X direction, the electrode material layer 21 and the piezoelectric material layer 22 in each ultrasonic generating unit 20 are stacked along the first preset direction, and each ultrasonic generating unit 20 is also stacked along the first preset direction, that is, the extension directions of each electrode material layer 21 and the piezoelectric material layer 22 are parallel to each other and are stacked along the same straight line direction, and two adjacent ultrasonic generating units 20 can share one electrode material layer 21. Exemplarily, there are two ultrasonic generating units 20, and the two ultrasonic generating units 20 can share one electrode material layer 21, and only two piezoelectric material layers 22 and three electrode material layers 21 are needed to form two ultrasonic generating units 20.

[0081] In this embodiment, the electrode material layer 21 and the piezoelectric material layer 22 in each ultrasonic generating unit 20 are stacked along a first preset direction and each ultrasonic generating unit 20 is stacked along the first preset direction. Two adjacent ultrasonic generating units 20 are configured to share an electrode material layer 21. Similarly, each ultrasonic generating unit 20 can include two electrode material layers 21 to provide an electric field and polarize the piezoelectric material layer 22, thereby reducing the number of electrode material layers 21 set and reducing the production cost.

[0082] In some embodiments, at least two ultrasonic generating units 20 include a first ultrasonic generating unit 30 and a second ultrasonic generating unit 40, the vibration directions of the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 are perpendicular to each other, the second ultrasonic waves generated by the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 both have simple harmonic oscillation waveforms, there is a preset phase difference and a preset frequency ratio between the second ultrasonic waves generated by the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40, the preset frequency ratio is a rational number, and the first ultrasonic wave formed by the superposition of the second ultrasonic waves generated by the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 has a Lissajous waveform.

[0083] Among them, the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 can be stacked or spaced. When the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 are stacked, the superposition effect of the second ultrasonic wave is better and the space occupied by the ultrasonic transmitting module 10 is saved. The vibration directions of the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 are perpendicular to each other. The waveforms of the second ultrasonic waves generated by the two are simple harmonic oscillation waveforms, and there is a preset phase difference and a preset frequency ratio between the waveforms of the second ultrasonic waves generated by the two ultrasonic generating units 20 whose vibration directions are perpendicular to each other. The waveform curve of the ultrasonic wave formed by the superposition of the two ultrasonic waves with simple harmonic oscillation waveforms generated by the two ultrasonic generating units 20 whose vibration directions are perpendicular to each other is a regular, stable closed curve. Therefore, the two second ultrasonic waves with simple harmonic oscillation waveforms generated by the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 when the vibration directions are perpendicular to each other can be superimposed to form a first ultrasonic wave with a Lissajous waveform. By way of example, refer to Figure 5 As shown, when the two second ultrasonic waves generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 have different preset phase differences and preset frequency ratios, a first ultrasonic wave having a corresponding Lissajous waveform can be formed as shown in the figure.

[0084] In this embodiment, by setting the vibration directions of the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 to be perpendicular to each other, and making the waveforms of the second ultrasonic waves generated by the two to be simple harmonic oscillation waveforms, and the waveforms of the second ultrasonic waves generated by the two to have a preset phase difference and a preset frequency ratio, it is possible to achieve that the two second ultrasonic waves generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 can be superimposed to form a first ultrasonic wave having a Lissajous waveform. Since the Lissajous waveform is a closed curve and has a certain regularity, the characteristics of the Lissajous waveform can be used to encrypt and decrypt fingerprint identification information, and by controlling the preset phase difference and preset frequency ratio between the second ultrasonic waves generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40, different Lissajous waveforms can be obtained, and then a variety of encryption methods can be achieved by controlling the preset phase difference and the preset frequency ratio, thereby improving the user experience.

[0085] In some embodiments, reference Figure 1 or Figure 2 As shown, the ultrasonic transmitting module 10 includes a first electrode material layer 31, a first piezoelectric material layer 32, a second electrode material layer 33, a second piezoelectric material layer 41 and a third electrode material layer 42 stacked in sequence, the first electrode material layer 31, the first piezoelectric material layer 32 and the second electrode material layer 33 constitute a first ultrasonic generating unit 30, the second electrode material layer 33, the second piezoelectric material layer 41 and the third electrode material layer 42 constitute a second ultrasonic generating unit 40, and the vibration directions of the first piezoelectric material layer 32 and the second piezoelectric material layer 41 under the same polarization direction are perpendicular to each other.

[0086] Among them, the first electrode material layer 31, the first piezoelectric material layer 32, the second electrode material layer 33, the second piezoelectric material layer 41 and the third electrode material layer 42 are stacked, the first electrode material layer 31, the first piezoelectric material layer 32 and the second electrode material layer 33 constitute the first ultrasonic generating unit 30, the second electrode material layer 33, the second piezoelectric material layer 41 and the third electrode material layer 42 constitute the second ultrasonic generating unit 40, and the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 share the second electrode material layer 33.

[0087] In this stacking arrangement, the polarization directions of the first piezoelectric material layer 32 and the second piezoelectric material layer 41 are the same, and the first piezoelectric material layer 32 and the second piezoelectric material layer 41 are arranged so that the vibration directions under the same polarization direction are perpendicular to each other, so that the vibration directions of the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 are perpendicular to each other. Exemplarily, the mathematical abstract waveform curve function of the second ultrasonic wave generated by the first ultrasonic wave generating unit 30 in the aforementioned xy coordinate system is x(t)=sin(at+θ), and the waveform curve of the second ultrasonic wave generated by the first ultrasonic wave generating unit 30 is as follows: Figure 6 As shown, the mathematical abstract waveform curve function of the second ultrasonic wave generated by the second ultrasonic wave generating unit 40 in the aforementioned xy coordinate system is y(t)=sin(bt+δ), and the waveform curve of the second ultrasonic wave generated by the second ultrasonic wave generating unit 40 is as shown in FIG. Figure 7 As shown, the second ultrasonic wave generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 can be superimposed to form a waveform curve as shown in FIG. Figure 8 The Lissajous waveform is shown.

[0088] In this embodiment, the first electrode material layer 31, the first piezoelectric material layer 32, the second electrode material layer 33, the second piezoelectric material layer 41 and the third electrode material layer 42 are stacked to form a first ultrasonic wave generating unit 30 and a second ultrasonic wave generating unit 40 stacked on each other. The first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 share the same second electrode material layer 33, which reduces the number of electrode material layers 21 and reduces the production cost. The first piezoelectric material layer 32 and the second piezoelectric material layer 41 are set to have vibration directions perpendicular to each other under the same polarization direction, so that the vibration directions of the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 are perpendicular to each other, which provides the prerequisite for the two second ultrasonic waves generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 to be superimposed to form a first ultrasonic wave with a Lissajous waveform. The characteristics of the Lissajous waveform can be used to encrypt and decrypt fingerprint identification information, and multiple encryption methods can be realized by controlling the preset phase difference and the preset frequency ratio, thereby improving the user experience.

[0089] In some embodiments, reference Figure 1 or Figure 2 As shown, the driving module 60 includes a first power source 61 and a second power source 62 . The first power source 61 is connected to the first electrode material layer 31 and the second electrode material layer 33 , respectively. The second power source 62 is connected to the second electrode material layer 33 and the third electrode material layer 42 , respectively.

[0090] The driving module 60 includes a first power supply 61 and a second power supply 62. The first power supply 61 is connected to the second electrode material layer 33 and the second electrode material layer 33, respectively. The first power supply 61 is used to provide an electrical signal to the first ultrasonic generating unit 30 to drive the first ultrasonic generating unit 30 to vibrate. The second power supply 62 is connected to the second electrode material layer 33 and the third electrode material layer 42, respectively. The second power supply 62 is used to provide an electrical signal to the second ultrasonic generating unit 40 to drive the second ultrasonic generating unit 40 to vibrate.

[0091] In this embodiment, by setting a first power supply 61 connected to the first electrode material layer 31 and the second electrode material layer 33, an electrical signal is provided to the first ultrasonic generating unit 30, thereby driving the first ultrasonic generating unit 30 to vibrate. By setting a second power supply 62 connected to the second electrode material layer 33 and the third electrode material layer 42, an electrical signal is provided to the second ultrasonic generating unit 40, thereby driving the second ultrasonic generating unit 40 to vibrate, so that the second ultrasonic waves generated by the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 can be superimposed to form a first ultrasonic wave having a Lissajous waveform. The characteristics of the Lissajous waveform can be used to encrypt and decrypt fingerprint identification information, and a variety of encryption methods can be implemented by controlling a preset phase difference and a preset frequency ratio, thereby improving user experience.

[0092] In some embodiments, reference Figure 3 As shown, the ultrasonic transmitting module 10 includes a third piezoelectric material layer 34, a fourth electrode material layer 43, a fourth piezoelectric material layer 44 and a fifth electrode material layer 45 which are stacked in sequence along a second preset direction. A sixth electrode material layer 35 and a seventh electrode material layer 36 are respectively arranged on both sides of the third piezoelectric material layer 34 along the third preset direction. The second preset direction is perpendicular to the third preset direction. The third piezoelectric material layer 34, the sixth electrode material layer 35 and the seventh electrode material layer 36 constitute a first ultrasonic generating unit 30. The fourth electrode material layer 43, the fourth piezoelectric material layer 44 and the fifth electrode material layer 45 constitute a second ultrasonic generating unit 40. The third piezoelectric material layer 34 and the fourth piezoelectric material layer 44 have the same vibration direction under the same polarization direction.

[0093] The second preset direction is, for example, Figure 3 In the Y direction, the third piezoelectric material layer 34, the fourth electrode material layer 43, the fourth piezoelectric material layer 44 and the fifth electrode material layer 45 are stacked along the second preset direction, and the fourth electrode material layer 43, the fourth piezoelectric material layer 44 and the fifth electrode material layer 45 constitute the second ultrasonic generating unit 40. The third preset direction is, for example, Figure 3 In the Z direction, the third piezoelectric material layer 34 is also provided with a sixth electrode material layer 35 and a seventh electrode material layer 36 on both sides of the third preset direction perpendicular to the second preset direction, and the third piezoelectric material layer 34, the sixth electrode material layer 35 and the seventh electrode material layer 36 constitute the first ultrasonic generating unit 30.

[0094] In this stacking arrangement, the polarization directions of the third piezoelectric material layer 34 and the fourth piezoelectric material layer 44 are perpendicular to each other, and the third piezoelectric material layer 34 and the fourth piezoelectric material layer 44 are arranged to have the same vibration direction under the same polarization direction, so that the vibration directions of the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 are perpendicular to each other. Exemplarily, the mathematical abstract waveform curve function of the second ultrasonic wave generated by the first ultrasonic wave generating unit 30 in the aforementioned xy coordinate system is x(t)=sin(at+θ), and the waveform curve of the second ultrasonic wave generated by the first ultrasonic wave generating unit 30 is as follows: Figure 6 As shown, the mathematical abstract waveform curve function of the second ultrasonic wave generated by the second ultrasonic wave generating unit 40 in the aforementioned xy coordinate system is y(t)=sin(bt+δ), and the waveform curve of the second ultrasonic wave generated by the second ultrasonic wave generating unit 40 is as shown in FIG. Figure 7 As shown, the second ultrasonic wave generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 can be superimposed to form a waveform curve as shown in FIG. Figure 8 The Lissajous waveform is shown.

[0095] In this embodiment, the third piezoelectric material layer 34, the fourth electrode material layer 43, the fourth piezoelectric material layer 44 and the fifth electrode material layer 45 are stacked and arranged along the second preset direction, and the sixth electrode material layer 35 and the seventh electrode material layer 36 are respectively arranged on both sides of the third piezoelectric material layer 34 along the third preset direction perpendicular to the second preset direction, so as to form a first ultrasonic wave generating unit 30 and a second ultrasonic wave generating unit 40 with mutually perpendicular polarization directions. The third piezoelectric material layer 34 and the fourth piezoelectric material layer 44 are arranged to have the same vibration direction under the same polarization direction, so that the vibration directions of the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 are mutually perpendicular, which provides the prerequisite for the two second ultrasonic waves generated by the first ultrasonic wave generating unit 30 and the second ultrasonic wave generating unit 40 to be superimposed to form a first ultrasonic wave with a Lissajous waveform, and the characteristics of the Lissajous waveform can be used to encrypt and decrypt fingerprint identification information, and multiple encryption methods can be realized by controlling the preset phase difference and the preset frequency ratio, thereby improving the user experience.

[0096] In some embodiments, the driving module 60 includes a third power source 63 and a fourth power source 64 , the third power source 63 is connected to the fourth electrode material layer 43 and the fifth electrode material layer 45 , respectively, and the fourth power source 64 is connected to the sixth electrode material layer 35 and the seventh electrode material layer 36 , respectively.

[0097] The driving module 60 includes a third power supply 63 and a fourth power supply 64. The third power supply 63 is connected to the fourth electrode material layer 43 and the fifth electrode material layer 45, respectively. The third power supply 63 is used to provide an electrical signal to the second ultrasonic generating unit 40 to drive the second ultrasonic generating unit 40 to vibrate. The fourth power supply 64 is connected to the sixth electrode material layer 35 and the seventh electrode material layer 36, respectively. The fourth power supply 64 is used to provide an electrical signal to the first ultrasonic generating unit 30 to drive the first ultrasonic generating unit 30 to vibrate.

[0098] In this embodiment, by setting a third power supply 63 connected to the fourth electrode material layer 43 and the fifth electrode material layer 45, an electrical signal is provided to the second ultrasonic generating unit 40, thereby driving the second ultrasonic generating unit 40 to vibrate. By setting a fourth power supply 64 connected to the sixth electrode material layer 35 and the seventh electrode material layer 36, an electrical signal is provided to the first ultrasonic generating unit 30, thereby driving the first ultrasonic generating unit 30 to vibrate. This allows the second ultrasonic wave generated by the first ultrasonic generating unit 30 and the second ultrasonic generating unit 40 to be superimposed to form a first ultrasonic wave having a Lissajous waveform. The characteristics of the Lissajous waveform can be used to encrypt and decrypt fingerprint identification information, and a variety of encryption methods can be implemented by controlling a preset phase difference and a preset frequency ratio, thereby improving user experience.

[0099] In some embodiments, reference Figure 1 , Figure 2 or Figure 3 As shown, the ultrasonic receiving module 50 includes an inverse piezoelectric material layer 51 stacked in at least one ultrasonic generating unit 20 .

[0100] The ultrasonic receiving module 50 includes an inverse piezoelectric material layer 51 disposed in the ultrasonic generating unit 20. Exemplarily, the inverse piezoelectric material layer 51 is stacked between the piezoelectric material layer 22 and the electrode material layer 21 in the ultrasonic generating unit 20. The inverse piezoelectric material layer 51 can generate vibration feedback to the reflected first ultrasonic wave, and convert the vibration into an electrical signal as fingerprint recognition information through the characteristics of the inverse piezoelectric material layer 51.

[0101] In this embodiment, by setting an inverse piezoelectric material layer 51 in the ultrasonic generating unit 20 as an ultrasonic receiving module 50, it is possible to receive the reflected first ultrasonic wave and generate corresponding vibration feedback to the reflected first ultrasonic wave. Through the characteristics of the inverse piezoelectric material layer 51, the vibration is converted into an electrical signal representing the fingerprint recognition information, thereby realizing the corresponding identification or storage of the reflected first ultrasonic wave or the determined fingerprint recognition information for user identity authentication.

[0102] In an exemplary embodiment, reference Figure 2 and Figure 3As shown, a display screen assembly is provided, which includes a display panel 80 and the fingerprint recognition module as described above. The display panel 80 has a fingerprint recognition area, and the fingerprint recognition module is arranged on the back of the display panel 80 and corresponds to the fingerprint recognition area.

[0103] The display screen assembly includes a fingerprint recognition module and a display panel 80. The fingerprint recognition module is arranged on the back of the display panel 80, and the fingerprint recognition module is arranged on a side close to the inner surface of the display panel 80, that is, when the user faces the outer surface of the display panel (i.e., the display surface), the side away from the user. The display panel 80 has a fingerprint recognition area. When the user's finger touches the fingerprint recognition area on the display panel 80, the fingerprint recognition module arranged on the back of the display panel 80 and corresponding to the fingerprint recognition area can send a first ultrasonic wave to the fingerprint recognition area through the ultrasonic transmission module 10, and can form a fingerprint image according to the first ultrasonic wave reflected by the finger on the fingerprint recognition area.

[0104] In this embodiment, by setting the display panel 80 and the fingerprint recognition module, the display screen assembly can send the first ultrasonic wave to the fingerprint recognition area of ​​the display panel 80 through the fingerprint recognition module, and realize the user identity verification of fingerprint recognition based on the reflected first ultrasonic wave. The ultrasonic wave generating unit 20 with different vibration directions can make multiple second ultrasonic waves superimposed to form a first ultrasonic wave with a complex waveform, realize ultrasonic wave encryption, and then make the fingerprint image determined according to the reflected first ultrasonic wave no longer the actual fingerprint image, but the encrypted fingerprint information, which enhances the reliability and security of user identity verification scenarios such as fingerprint collection and storage, and improves the user experience.

[0105] In some embodiments, a vibration direction of the at least one ultrasonic wave generating unit 20 is perpendicular to an outer surface of the display panel 80 .

[0106] In this embodiment, the vibration direction of at least one ultrasonic generating unit 20 is set to be perpendicular to the outer surface of the display panel 80, i.e., the display surface. The vibration of the ultrasonic generating unit 20 can make the first ultrasonic wave formed by the superposition of the second ultrasonic waves generated by each ultrasonic generating unit 20 have a higher energy density in the direction toward the outer surface of the display panel 80, which is convenient for detecting the fingerprint on the fingerprint recognition area on the outer surface of the display panel 80 and ensures the stability of fingerprint recognition.

[0107] In some embodiments, reference Figure 1 , Figure 2 or Figure 3 As shown, the piezoelectric material layer 22 of each ultrasonic generating unit 20 in the fingerprint recognition module is arranged parallel to the outer surface of the display panel 80 , and the ultrasonic receiving module 50 is arranged in the ultrasonic generating unit 20 adjacent to the display panel 80 .

[0108] In this embodiment, the piezoelectric material layer 22 of each ultrasonic generating unit 20 in the fingerprint recognition module is arranged parallel to the outer surface of the display panel 80, that is, the display surface, and the ultrasonic receiving module 50 is arranged in the ultrasonic generating unit 20 adjacent to the display panel 80, so that the ultrasonic receiving module 50 can be located at the closest position to the display panel 80. When the first ultrasonic wave is reflected, it can reach the ultrasonic receiving module 50 through the shortest path, so that the reflected first ultrasonic wave received by the ultrasonic receiving module 50 is more accurate, thereby improving the accuracy of fingerprint recognition.

[0109] In an exemplary embodiment, reference Fig. 9 As shown, a fingerprint recognition method is provided, and the fingerprint recognition method includes:

[0110] S100, receiving a fingerprint recognition instruction.

[0111] In step S100 , when a user's finger contacts a fingerprint recognition area on a display panel, a fingerprint recognition instruction is received, where the fingerprint recognition instruction is used to instruct to start a fingerprint recognition process.

[0112] S200. Based on the fingerprint recognition instruction, a control signal is sent, where the control signal is used to instruct each ultrasonic generating unit in the ultrasonic transmitting module to vibrate to generate a second ultrasonic wave, at least two ultrasonic generating units have different vibration directions, and each second ultrasonic wave is superimposed to form a first ultrasonic wave.

[0113] In step S200, based on the received fingerprint recognition instruction, a control signal is sent, and the control signal is used to instruct each ultrasonic generating unit 20 in the ultrasonic transmitting module 10 to vibrate to generate a second ultrasonic wave, and the vibration directions of at least two ultrasonic generating units 20 are different, and each second ultrasonic wave is superimposed to form a first ultrasonic wave as a detection ultrasonic wave. For example. The control signal can control the driving module 60 in the above-mentioned fingerprint recognition module to turn on, and the power supply in the driving module 60 can provide an electrical signal to each ultrasonic generating unit 20 to drive each ultrasonic generating unit 20 to vibrate, forming a second ultrasonic wave corresponding to each ultrasonic generating unit 20.

[0114] S300: Perform a fingerprint recognition operation according to a first ultrasonic wave reflected by a target object and received by an ultrasonic wave receiving module.

[0115] In step S300, the ultrasonic receiving module receives the first ultrasonic wave reflected by the target object, which may be, for example, a user's finger. Then, a corresponding fingerprint recognition operation may be performed according to the first ultrasonic wave reflected by the target object. The fingerprint recognition operation may be, for example, fingerprint information storage, user verification, etc.

[0116] In this embodiment, a fingerprint recognition instruction is received and a control signal is sent to instruct each ultrasonic generating unit 20 in the ultrasonic transmitting module 10 to vibrate to generate a second ultrasonic wave, each second ultrasonic wave is superimposed to form a first ultrasonic wave, and a fingerprint recognition operation is performed according to the reflected first ultrasonic wave, thereby realizing fingerprint recognition based on the ultrasonic signal. At least two ultrasonic generating units 20 have different vibration directions, which can make multiple second ultrasonic waves superimposed to form a first ultrasonic wave with a complex waveform, realizing ultrasonic encryption, and thus making the fingerprint image determined according to the reflected first ultrasonic wave no longer the actual fingerprint image, but encrypted fingerprint information, thereby enhancing the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improving the user experience.

[0117] In an exemplary embodiment, reference Fig.10 As shown, a fingerprint recognition device is provided, which includes a receiving module 71, a sending module 72 and an execution module 73. The receiving module 71 is used to receive a recognition instruction; the sending module 72 is used to send a control signal based on the fingerprint recognition instruction, and the control signal is used to instruct each ultrasonic generating unit 20 in the ultrasonic transmitting module 10 to vibrate to generate a second ultrasonic wave, at least two ultrasonic generating units 20 have different vibration directions, and each second ultrasonic wave is superimposed to form a first ultrasonic wave; the execution module 73 is used to perform a corresponding fingerprint recognition operation according to the first ultrasonic wave emitted by the target object received by the ultrasonic receiving module 50.

[0118] In this embodiment, the identification instruction is received by the receiving module 71, the control signal for instructing each ultrasonic generating unit 20 in the ultrasonic transmitting module 10 to vibrate to generate the second ultrasonic wave is sent by the sending module 72, and the fingerprint identification operation is performed by the executing module 73 according to the first ultrasonic wave reflected by the target object received by the ultrasonic receiving module 50, so that the fingerprint is identified based on the ultrasonic signal. At least two ultrasonic generating units 20 have different vibration directions, which can make multiple second ultrasonic waves superimposed to form a first ultrasonic wave with a complex waveform, and realize ultrasonic encryption, so that the fingerprint image determined according to the reflected first ultrasonic wave is no longer the actual fingerprint image, but encrypted fingerprint information, which enhances the reliability and security of user identity authentication scenarios such as fingerprint collection and storage, and improves the user experience.

[0119] In an exemplary embodiment, an electronic device is provided. The electronic device may be, for example, a mobile phone, a tablet computer, a laptop computer, etc. The electronic device includes the screen assembly as described above.

[0120] refer to Fig.11As shown, the electronic device may include one or more of the following components: a processing component 101 , a memory 102 , a power component 103 , a multimedia component 104 , an audio component 105 , an input / output (I / O) interface 106 , a sensor component 107 , and a communication component 108 .

[0121] The processing component 101 generally controls the overall operation of the electronic device, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 101 may include one or more processors 109 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 101 may include one or more modules to facilitate the interaction between the processing component 101 and other components. For example, the processing component 101 may include a multimedia module to facilitate the interaction between the multimedia component 104 and the processing component 101.

[0122] The memory 102 is configured to store various types of data to support operations on the electronic device. Examples of such data include instructions for any application or method operating on the electronic device, contact data, phone book data, messages, pictures, videos, etc. The memory 102 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0123] The power component 103 provides power to various components of the electronic device. The power component 103 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device.

[0124] The multimedia component 104 includes a screen that provides an output interface between the electronic device and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. Exemplarily, when the user authenticates and contacts the touch panel, a fingerprint recognition instruction is received and the fingerprint recognition module is correspondingly turned on, and a first ultrasonic wave is sent to the fingerprint recognition area on the touch panel through the fingerprint recognition module to complete the user authentication by fingerprint recognition of the user contacting the touch panel. In some embodiments, the multimedia component 104 includes a front camera and / or a rear camera. When the electronic device is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0125] The audio component 105 is configured to output and / or input audio signals. For example, the audio component 105 includes a microphone (MIC), and when the electronic device is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 102 or sent via the communication component 108. In some embodiments, the audio component 105 also includes a speaker for outputting audio signals.

[0126] I / O interface 106 provides an interface between processing component 101 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0127] The sensor assembly 107 includes one or more sensors for providing various aspects of status assessment for the electronic device. For example, the sensor assembly 107 can detect the on / off state of the electronic device, the relative positioning of components, such as the display and keypad of the electronic device, and the sensor assembly 107 can also detect the position change of the electronic device or a component of the electronic device, the presence or absence of user contact with the electronic device, the orientation or acceleration / deceleration of the electronic device and the temperature change of the electronic device. The sensor assembly 107 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 107 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 107 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0128] The communication component 108 is configured to facilitate wired or wireless communication between the electronic device and other devices. The device can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 108 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 108 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0129] In an exemplary embodiment, the electronic device may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned fingerprint recognition method applied to the electronic device.

[0130] In an exemplary embodiment, a non-temporary computer-readable storage medium including instructions is also provided, such as a memory 102 including instructions, and the above instructions can be executed by a processor 109 of an electronic device to complete the above fingerprint recognition method applied to the electronic device. For example, the non-temporary computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a tape, a floppy disk, and an optical data storage device. When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device is enabled to perform the fingerprint recognition method of the smart device shown in the above embodiment.

[0131] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0132] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A fingerprint recognition module, characterized in that: The fingerprint recognition module comprises: An ultrasonic transmitting module, the ultrasonic transmitting module is used to transmit a first ultrasonic wave, the ultrasonic transmitting module comprises at least two ultrasonic generating units, each of the ultrasonic generating units generates an ultrasonic wave by vibration, and at least two of the ultrasonic generating units have different vibration directions; An ultrasonic receiving module, the ultrasonic receiving module is used to receive the first ultrasonic wave after reflection; A driving module is connected to each of the ultrasonic wave generating units, and is used to drive each of the ultrasonic wave generating units to vibrate to generate a second ultrasonic wave, and each of the second ultrasonic waves is superimposed to form the first ultrasonic wave.

2. The fingerprint recognition module according to claim 1, characterized in that: The ultrasonic generating unit comprises: Two electrode material layers, each of the electrode material layers is connected to the driving module; A piezoelectric material layer is located between the two electrode material layers, and the ultrasonic wave generating unit generates the second ultrasonic wave through the vibration of the piezoelectric material layer.

3. The fingerprint recognition module according to claim 2, characterized in that: In each of the ultrasonic generating units, the electrode material layer and the piezoelectric material layer are stacked along a first preset direction, and the piezoelectric material layers of at least two of the ultrasonic generating units have different vibration directions under the same polarization direction; or, The piezoelectric material layers have the same vibration direction under the same polarization direction, and in at least two of the ultrasonic generating units, the electrode material layers and the piezoelectric material layers have different stacking directions.

4. The fingerprint recognition module according to claim 3, characterized in that: In each of the ultrasonic generating units, the electrode material layer and the piezoelectric material layer are both stacked along the first preset direction and each of the ultrasonic generating units is stacked along the first preset direction, and adjacent ultrasonic generating units share one electrode material layer.

5. The fingerprint recognition module according to claim 2, characterized in that: The at least two ultrasonic generating units include a first ultrasonic generating unit and a second ultrasonic generating unit, the vibration directions of the first ultrasonic generating unit and the second ultrasonic generating unit are perpendicular to each other, the second ultrasonic waves generated by the first ultrasonic generating unit and the second ultrasonic generating unit both have simple harmonic oscillation waveforms, and the first ultrasonic wave formed by the superposition of the second ultrasonic waves generated by the first ultrasonic generating unit and the second ultrasonic generating unit has a Lissajous waveform.

6. The fingerprint recognition module according to claim 5, characterized in that: The ultrasonic transmitting module includes a first electrode material layer, a first piezoelectric material layer, a second electrode material layer, a second piezoelectric material layer and a third electrode material layer stacked in sequence, the first electrode material layer, the first piezoelectric material layer and the second electrode material layer constitute a first ultrasonic generating unit, the second electrode material layer, the second piezoelectric material layer and the third electrode material layer constitute the second ultrasonic generating unit, and the vibration directions of the first piezoelectric material layer and the second piezoelectric material layer under the same polarization direction are perpendicular to each other.

7. The fingerprint recognition module according to claim 6, characterized in that: The driving module includes a first power source and a second power source, wherein the first power source is connected to the first electrode material layer and the second electrode material layer respectively, and the second power source is connected to the second electrode material layer and the third electrode material layer respectively.

8. The fingerprint recognition module according to claim 5, characterized in that: The ultrasonic transmitting module includes a third piezoelectric material layer, a fourth electrode material layer, a fourth piezoelectric material layer and a fifth electrode material layer stacked in sequence along a second preset direction, a sixth electrode material layer and a seventh electrode material layer are respectively arranged on both sides of the third piezoelectric material layer along the third preset direction, the second preset direction is perpendicular to the third preset direction, the third piezoelectric material layer, the sixth electrode material layer and the seventh electrode material layer constitute the first ultrasonic generating unit, the fourth electrode material layer, the fourth piezoelectric material layer and the fifth electrode material layer constitute the second ultrasonic generating unit, and the third piezoelectric material layer and the fourth piezoelectric material layer have the same vibration direction under the same polarization direction.

9. The fingerprint recognition module according to claim 8, characterized in that: The driving module includes a third power supply and a fourth power supply, wherein the third power supply is connected to the fourth electrode material layer and the fifth electrode material layer respectively, and the fourth power supply is connected to the sixth electrode material layer and the seventh electrode material layer respectively.

10. The fingerprint recognition module according to any one of claims 1 to 9, characterized in that: The ultrasonic receiving module includes an inverse piezoelectric material layer stacked in at least one of the ultrasonic generating units.

11. A display screen assembly, characterized in that: The display screen assembly includes a display panel and a fingerprint recognition module as described in any one of claims 1 to 10, the display panel has a fingerprint recognition area, and the fingerprint recognition module is arranged on the back of the display panel and corresponds to the fingerprint recognition area.

12. The display screen assembly according to claim 11, characterized in that: A vibration direction of at least one of the ultrasonic wave generating units is perpendicular to an outer surface of the display panel.

13. The display screen assembly according to claim 11, characterized in that: The piezoelectric material layer of each of the ultrasonic generating units in the fingerprint recognition module is arranged parallel to the outer surface of the display panel, and the ultrasonic receiving module is arranged in the ultrasonic generating unit adjacent to the display panel.

14. A fingerprint recognition method, characterized in that: The fingerprint recognition method comprises: Receive fingerprint recognition instructions; Based on the fingerprint recognition instruction, a control signal is issued, wherein the control signal is used to instruct each ultrasonic wave generating unit in the ultrasonic wave transmitting module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic wave generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave; A fingerprint recognition operation is performed according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

15. A fingerprint recognition device, characterized in that: The fingerprint recognition device comprises: A receiving module, the receiving module is used to receive an identification instruction; A sending module, the sending module is used to send a control signal based on the fingerprint recognition instruction, the control signal is used to instruct each ultrasonic generating unit in the ultrasonic sending module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave; The execution module is used to perform a fingerprint recognition operation according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

16. An electronic device, characterized in that: The electronic device comprises the display screen assembly as described in any one of claims 11-13.

17. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: Receive fingerprint recognition instructions; Based on the fingerprint recognition instruction, a control signal is issued, wherein the control signal is used to instruct each ultrasonic wave generating unit in the ultrasonic wave transmitting module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic wave generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave; A fingerprint recognition operation is performed according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

18. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform a fingerprint recognition method, the fingerprint recognition method comprising: Receive fingerprint recognition instructions; Based on the fingerprint recognition instruction, a control signal is issued, wherein the control signal is used to instruct each ultrasonic wave generating unit in the ultrasonic wave transmitting module to vibrate to generate a second ultrasonic wave, at least two of the ultrasonic wave generating units have different vibration directions, and each of the second ultrasonic waves is superimposed to form a first ultrasonic wave; A fingerprint recognition operation is performed according to the first ultrasonic wave reflected by the target object and received by the ultrasonic wave receiving module.

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