CN115483984B

CN115483984B - Fingerprint module, control method and device, readable storage medium and electronic equipment

Info

Publication number: CN115483984B
Application number: CN202211110032.8A
Authority: CN
Inventors: 金长春; 代威
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2024-01-12
Anticipated expiration: 2042-09-13
Also published as: CN115483984A

Abstract

The application discloses fingerprint module, control method and device, readable storage medium, electronic equipment, including base plate and circuit layer, the circuit layer sets up on the base plate, and the circuit layer includes pressure sensing circuit, transmission circuit, filter module and ultrasonic circuit: the first end of the transmission circuit is connected with the pressure sensing circuit; the filter module comprises a plurality of filter units and a plurality of switches, wherein first ends of the switches are respectively connected with the filter units, and second ends of the switches are connected with the transmission circuit; the ultrasonic circuit is connected with the second end of the transmission circuit.

Description

Fingerprint module, control method and device, readable storage medium and electronic equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a fingerprint module, a control method of the fingerprint module, a control device of the fingerprint module, a readable storage medium and electronic equipment.

Background

At present, in the related art, the pressure-sensitive ultrasonic fingerprint module can collect fingerprints, and the pressure-sensitive ultrasonic fingerprint module can interact with a Central Processing Unit (CPU), but in the process that the pressure-sensitive ultrasonic fingerprint module interacts with the CPU, the pressure-sensitive ultrasonic fingerprint module can be interfered by a radio frequency antenna network, and then the data interaction between the pressure-sensitive ultrasonic fingerprint module and the CPU is influenced.

Disclosure of Invention

The application aims to provide a fingerprint module, a control method and a control device thereof, a readable storage medium and electronic equipment, and at least solves one of the problems that a radio frequency antenna in the related technology can generate interference to the electronic equipment and influence signal transmission quality.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, the embodiment of the application provides a fingerprint module, including base plate and circuit layer, the circuit layer sets up on the base plate, and the circuit layer includes pressure sensing circuit, transmission circuit, filter module and ultrasonic circuit: the first end of the transmission circuit is connected with the pressure sensing circuit; the filter module comprises a plurality of filter units and a plurality of switches, wherein first ends of the switches are respectively connected with the filter units, and second ends of the switches are connected with the transmission circuit; the ultrasonic circuit is connected with the second end of the transmission circuit.

In a second aspect, an embodiment of the present application provides a method for controlling a fingerprint module, where the method for controlling a fingerprint module is used for controlling the fingerprint module of the first aspect, and the method for controlling a fingerprint module includes: based on the pressed pressure sensing circuit, controlling the switch corresponding to the first filtering unit in the plurality of switches to be conducted according to the working mode of the radio frequency unit and/or the working mode of the pressure sensing circuit so as to enable the first filtering unit to filter; the first filtering unit is at least one filtering unit corresponding to the working mode of the radio frequency unit and/or the working mode of the pressure sensing circuit in the plurality of filtering units.

In a third aspect, an embodiment of the present application provides a control device for a fingerprint module, where the control device for a fingerprint module is configured to control the fingerprint module of the first aspect, and the control device for a fingerprint module includes a control unit configured to control, based on a pressing of a pressure sensing circuit, on a switch corresponding to a first filtering unit among a plurality of switches according to a working mode of a radio frequency unit and/or a working mode of the pressure sensing circuit, so as to enable the first filtering unit to perform filtering; the first filtering unit is at least one filtering unit corresponding to the working mode of the radio frequency unit and/or the working mode of the pressure sensing circuit in the plurality of filtering units.

In a fourth aspect, an embodiment of the present application proposes a control device for a fingerprint module, including a memory and a processor, where the memory stores a program or an instruction that can be executed on the processor, and the program or the instruction implements the steps of the control method for a fingerprint module of the second aspect when executed by the processor.

In a fifth aspect, an embodiment of the present application proposes a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement the steps of the method for controlling a fingerprint module according to the second aspect.

In a sixth aspect, an embodiment of the present application proposes an electronic device, including: a fingerprint module of the first aspect; or the control device of the fingerprint module of the third aspect; or the control device of the fingerprint module of the fourth aspect; or the readable storage medium of the fifth aspect.

In the embodiment of the application, fingerprint module includes base plate and circuit layer, and the circuit layer sets up on the base plate, and the circuit layer includes pressure sensing circuit, transmission circuit, filter module and ultrasonic circuit: the first end of the transmission circuit is connected with the pressure sensing circuit; the filter module comprises a plurality of filter units and a plurality of switches, wherein first ends of the switches are respectively connected with the filter units, and second ends of the switches are connected with the transmission circuit; the ultrasonic circuit is connected with the second end of the transmission circuit and can control the on-off of the plurality of switches.

According to the fingerprint module, the substrate and the circuit layer are integrated into a whole, the occupied space for respectively arranging the substrate and the circuit layer is reduced, meanwhile, the pressure sensing circuit and the ultrasonic circuit are communicated through the transmission circuit, the filter module is internally provided with a plurality of filter units and a plurality of switches, the plurality of switches can respectively control the plurality of filter units to be communicated with the transmission circuit, the ultrasonic circuit can control the on or off of the plurality of switches, the linkage control of the ultrasonic circuit and the filter module is realized, the plurality of filter units in the filter module can filter noise interference caused by different radio frequency antennas of 2G (second generation mobile communication technology)/3G (third generation mobile communication technology)/4G (fourth generation mobile communication technology)/5G (fifth generation mobile communication technology), the filter units are matched with signals to be filtered, the filter effect of the filter module on different radio frequency antenna signals is improved, the accuracy of signal identification transmission is improved, the quality of the filter signal transmission is ensured, and the automation and the intelligent degree of the filter unit control is improved; meanwhile, the switch can be intelligently turned on or turned off by linkage control of the ultrasonic circuit and the filter module, signal noise caused by uneven resistance reactance distribution and noise generated by signal rising edges in the filter circuit layer is reduced, so that interference of the circuit layer on different radio frequency antennas is reduced, the intelligent degree and the automation degree of the whole fingerprint module are improved, accuracy of identification of the pressure sensing signals transmitted to the fingerprint module from the fingerprint module to the different radio frequency antennas and accuracy of transmission of the pressure sensing signals from the different radio frequency antennas are guaranteed, waveform quality of the pressure sensing signals is improved, transmission quality of the pressure sensing signals is guaranteed, use experience of a user on the pressure sensing fingerprint identification function in a network environment of the different radio frequency antennas is guaranteed, the intelligent on or off of the switch is controlled to enter a working state or release the working state through linkage control of the filter unit and the filter module, power consumption of the whole fingerprint module is reduced, and the fingerprint module is more energy-saving.

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

Drawings

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

FIG. 1 is a schematic diagram of a fingerprint module according to an embodiment of the present application;

FIG. 2 is a second schematic diagram of a fingerprint module according to an embodiment of the disclosure;

FIG. 3 is a schematic diagram of the working principle of a fingerprint module according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a capacitor according to an embodiment of the present application;

fig. 5 is a schematic diagram of the working principle of a capacitor according to an embodiment of the present application;

FIG. 6 is a graph of impedance versus frequency for a capacitor according to an embodiment of the present application;

FIG. 7 is an equivalent circuit diagram of a capacitor according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a band-pass filtering unit according to an embodiment of the present application;

fig. 9 is a frequency characteristic diagram of a band-pass filtering unit according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a resistor structure according to an embodiment of the present application;

FIG. 11 is a schematic structural view of a resistor according to another aspect of an embodiment of the present application;

Fig. 12 is a schematic diagram of the working principle of a resistor according to an embodiment of the present application;

fig. 13 is a schematic structural view of a low-pass filtering unit according to an embodiment of the present application;

fig. 14 is a frequency characteristic diagram of a low-pass filtering unit according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a high-pass filtering unit according to an embodiment of the present application;

fig. 16 is a frequency characteristic diagram of a high-pass filtering unit according to an embodiment of the present application;

fig. 17 is a schematic structural view of a TFT switch according to an embodiment of the present application;

FIG. 18 is a third schematic diagram of a fingerprint module according to an embodiment of the disclosure;

FIG. 19 is a schematic diagram of a fingerprint module according to an embodiment of the present application;

FIG. 20 is one of the flowcharts of the control method of the fingerprint module according to the embodiment of the application;

FIG. 21 is a second flowchart of a control method of a fingerprint module according to an embodiment of the present application;

FIG. 22 is a third flowchart of a control method of a fingerprint module according to an embodiment of the present application;

FIG. 23 is a fourth flowchart of a control method of a fingerprint module according to an embodiment of the present application;

FIG. 24 is a fifth flowchart of a control method of a fingerprint module according to an embodiment of the present application;

fig. 25 is a schematic structural view of an electronic device according to an embodiment of the present application;

FIG. 26 is a second schematic diagram of the operation principle of the fingerprint module according to the embodiment of the present application;

FIG. 27 is a functional flow diagram of a fingerprint module according to an embodiment of the present application;

fig. 28 is a block diagram of a control device of a fingerprint module according to an embodiment of the present application.

Reference numerals:

100 fingerprint modules, 101 voltage sensing circuits, 102 substrates, 104 circuit layers, 106 transmission circuits, 108 ultrasonic circuits, 110 filter modules, 112 golden finger modules, 114 high-frequency filter units, 116 first switches, 118 grounding devices, 120 first capacitors, 1202 equivalent capacitors, 122 equivalent inductors, 124 equivalent impedances, 126 equivalent resistors, 128 second capacitors, 130 first resistors, 132 third capacitors, 134 second resistors, 136 first conductive portions, 138 second conductive portions, 140 insulating portions, 142 band-pass filter units, 144 second switches, 146 third conductive portions, 148 fourth conductive portions, 150 conductive media, 152 wheatstone bridges, 154 third switches, 156 copolymer layers, 158 silver paste layers, 160 black film layers, 162 first glue layers, 164 copper layers, 166 second glue layers, 168 sources, 170 gates, 172 drains, 200 electronic devices, 202 central processing units, 204 display screens, 206 fingerprint areas, 208 radio frequency units, and 210 antennas.

Detailed Description

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

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

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

A fingerprint module 100, a control method and apparatus, a readable storage medium, an electronic device 200 according to embodiments of the present application are described below with reference to fig. 1 to 28.

As shown in fig. 1 and 2, a fingerprint module 100 according to some embodiments of the present application includes a substrate 102 and a circuit layer 104, the circuit layer 104 is disposed on the substrate 102, and the circuit layer 104 includes a pressure sensing circuit 101, a transmission circuit 106, a filtering module 110 and an ultrasonic circuit 108: wherein a first end of the transmission circuit 106 is connected with the pressure sensing circuit 101; the filter module 110 includes a plurality of filter units and a plurality of switches, wherein first ends of the plurality of switches are respectively connected with the plurality of filter units, and second ends of the plurality of switches are connected with the transmission circuit 106; the ultrasound circuit 108 is connected to a second terminal of the transmission circuit 106.

Specifically, the ultrasonic circuit 108 can control the on or off of the plurality of switches, and the on or off of the ultrasonic circuit 108 and the transmission circuit 106 is realized.

According to the fingerprint module 100 of the embodiment of the application, the substrate 102 and the circuit layer 104 are integrated into a whole, occupation space for respectively setting the substrate 102 and the circuit layer 104 is reduced, meanwhile, the pressure sensing circuit 101 and the ultrasonic circuit 108 are communicated through the transmission circuit 106, a plurality of filter units and a plurality of switches are arranged in the filter module 110, the plurality of switches can respectively control the plurality of filter units to be communicated with the transmission circuit 106, the ultrasonic circuit 108 can control the on or off of the plurality of switches, linkage control of the ultrasonic circuit 108 and the filter module 110 is realized, a plurality of filter units in the filter module 110 can filter noise interference caused by different radio frequency antennas 210 of 2G (second generation mobile communication technology)/3G (third generation mobile communication technology)/4G (fourth generation mobile communication technology)/5G (fifth generation mobile communication technology), the filter units are matched with signals to be filtered, the filter effect of the filter module 110 on the signals of different radio frequency antennas 210 is improved, accordingly, quality of signal identification transmission is guaranteed, automatic control of the filter units and intelligent signal transmission quality is improved, and the quality of the pressure sensing signal transmission quality of the pressure sensing signals of the pressure sensing antenna 210 is guaranteed, and the quality of the pressure sensing signals of the pressure sensing and the pressure sensing signals of the pressure sensing module is guaranteed.

Further, the fingerprint module 100 of the embodiment of the application realizes the linkage control of the ultrasonic circuit 108 and the filter module 110, can intelligently turn on or off the switch, and filters signal noise caused by uneven distribution of resistance reactance and clutter generated by a signal rising edge in the circuit layer 104, thereby reducing interference caused by the circuit layer 104 to different radio frequency antennas 210, improving the intelligent degree and the automation degree of the whole fingerprint module 100, ensuring the waveform quality of pressure sensing signals transmitted to different radio frequency antennas 210 by the fingerprint module 100, improving the accuracy of pressure sensing signal identification and transmission, and ensuring the quality of pressure sensing signal transmission.

Further, the fingerprint module 100 of the embodiment of the application controls the filter unit to enter the working state or release the working state by the linkage control of the filter unit and the filter module 110, and the intelligent switch is opened or closed to reduce the power consumption of the whole fingerprint module 100, so that the fingerprint module 100 is more energy-saving, and the use experience of a user on the electronic equipment 200 with the fingerprint identification function is improved.

According to the fingerprint module 100 disclosed by the embodiment of the application, through the linkage control of the ultrasonic circuit 108 and the filter module 110, noise interference caused by different radio frequency antennas 210 from 2G/3G/4G/5G can be filtered, and interference caused by signal noise to different radio frequency antennas 210 due to uneven resistance reactance distribution and clutter generated by signal rising edges in the circuit layer 104 of the fingerprint module 100 can be filtered, so that independent filtering of different radio frequency antennas 210 is realized, the accuracy of pressure sensing signal identification is improved, the waveform quality of the pressure sensing signal is ensured, the quality of signal transmission is ensured, the power consumption of the whole fingerprint module 100 is reduced, the technical problems that the radio frequency antennas 210 interfere the electronic equipment 200 and the signal transmission quality is poor are solved, the waveform quality of the pressure sensing signals between the fingerprint module 100 and the different radio frequency antennas 210 and the accuracy of pressure sensing signal identification in the transmission process are improved, and the use experience of a user on the pressure sensing fingerprint identification function under the network environment of the different radio frequency antennas 210 is further ensured.

Specifically, the circuit layer 104 further includes a golden finger module 112, and a plurality of conductive contacts are disposed in the golden finger module 112 for transmitting signals between the fingerprint module and the outside.

As shown in fig. 3, in some embodiments of the present application, the plurality of filtering units includes a plurality of high-frequency filtering units 114, the plurality of switches includes a plurality of first switches 116, first ends of the plurality of high-frequency filtering units 114 are connected to a grounding device 118, second ends of the plurality of high-frequency filtering units 114 are respectively connected to first ends of the plurality of switches, and second ends of the plurality of switches are connected to the transmission circuit 106; the plurality of high frequency filtering units 114 are capable of filtering high frequency signal interference.

Specifically, the plurality of high frequency filtering units 114 filter the high frequency signal interference from the radio frequency unit 208.

Further, the plurality of high frequency filtering units 114 of the plurality of filtering units may filter radio frequency signals from different antennas, and the plurality of switches includes a plurality of first switches 116.

It will be appreciated that when receiving radio frequency signals of different antennas, only the first switch 116 in the corresponding high frequency filtering unit 114 needs to be turned on, for example, when receiving 2G signals, the first switch 116 of the corresponding 2G high frequency filtering unit 114 needs to be turned on to filter the 2G signals, and the first switches 116 of the 3G, 4G, 5G high frequency filtering units 114 do not need to be turned on, and the signals of 3G, 4G, 5G do not need to be filtered.

Further, the second ends of the high-frequency filtering units 114 are respectively connected with the first ends of the switches, and the second ends of the switches are connected with the transmission circuit 106, so that on one hand, smoothness of signals in the circuit is ensured, and on the other hand, safety of circuit connection is ensured.

As shown in fig. 3 and 7, in some embodiments of the present application, each high frequency filtering unit 114 of the plurality of high frequency filtering units 114 includes:

the first capacitor 120, a first end of the first capacitor 120 is connected to one first switch 116 of the plurality of first switches 116, and a second end of the first capacitor 120 is grounded.

Further, the first end of the first capacitor 120 in the high-frequency filtering unit 114 is connected to one first switch 116 of the plurality of first switches 116, and the second end of the first capacitor 120 is grounded, so that signal transmission is ensured, and meanwhile, circuit connection safety is ensured.

In some embodiments of the present application, the cut-off frequencies of the plurality of high frequency filtering units 114 are different.

Further, the cut-off frequencies of the high-frequency filtering units 114 are different, signals in different frequency ranges can be filtered, the processing efficiency of the high-frequency filtering units 114 on different radio-frequency signals is improved, the filtering efficiency of the whole fingerprint module 100 is improved, the accuracy of pressure sensing signal transmission is improved, and the signal transmission quality is guaranteed.

As shown in fig. 3, in some embodiments of the present application, the plurality of filtering units includes a plurality of bandpass filtering units 142, the plurality of switches includes a plurality of second switches 144, first ends of the plurality of filtering units are connected to the ultrasound circuit 108, second ends of the plurality of filtering units are respectively connected to first ends of the plurality of second switches 144, and second ends of the plurality of second switches 144 are connected to the transmission circuit 106; the plurality of band-pass filter units 142 are capable of filtering signals from the pressure sensing circuit 101.

Further, the plurality of filtering units include a plurality of band-pass filtering units 142, the filtering frequencies of the plurality of band-pass filtering units 142 are different, so that pressure sensing signals with different frequencies can be filtered, signal noise caused by noise waves generated by uneven distribution of resistance reactance and rising edges of signals in the filtering circuit layer 104 is reduced, interference of the circuit layer 104 to different radio frequency antennas 210 is reduced, waveform quality of the pressure sensing signals transmitted to the different radio frequency antennas 210 by the fingerprint module 100 is ensured, accuracy of identification and transmission of the pressure sensing signals is improved, and quality of signal transmission is ensured.

It can be appreciated that, due to the plurality of bandpass filter units 142, when receiving the pressure sensing signal matched with the bandpass filter units 142, the corresponding second switch 144 needs to be opened, and for the unmatched bandpass filter units 142, the second switch 144 is kept in a closed state, so that the matching degree between the bandpass filter units 142 and the signal frequency is ensured, the bandpass filter units 142 are intelligently opened, the fingerprint module 100 is more energy-saving, and the energy consumption of the fingerprint module 100 is reduced.

Further, the first ends of the plurality of filtering units are connected with the ultrasonic circuit 108, the second ends of the plurality of filtering units are respectively connected with the first ends of the plurality of second switches 144, and the second ends of the plurality of second switches 144 are connected with the transmission circuit 106, so that the transmission of pressure sensing signals is ensured, meanwhile, the pressure sensing signals are connected with the ultrasonic circuit 108, the linkage control of the filtering units and the ultrasonic circuit 108 is realized, the fingerprint module 100 is more intelligent, and the use experience of a user is improved.

Specifically, the ultrasound circuitry 108 is coupled to the central processing unit 202.

As shown in fig. 3 and 4, in some embodiments of the present application, the first capacitor 120 includes: a first conductive portion 136, a second conductive portion 138, and an insulating portion 140, the first conductive portion 136 being disposed on the substrate 102; the second conductive portion 138 is disposed on the substrate 102 and opposite to the first conductive portion 136; the insulating portion 140 is disposed between the first conductive portion 136 and the second conductive portion 138.

Specifically, the first conductive portion 136 and the second conductive portion 138 may be made of a metal material such as aluminum, molybdenum, or titanium, and the insulating portion 140 may be made of a material such as silicon dioxide or silicon nitride. The facing area, distance and material of the insulating part between the metals can be adjusted to obtain capacitance value, thereby constructing the high-frequency filter unit.

Specifically, as shown in fig. 5, the working principle of the first capacitor 120 is that, taking fig. 5 as an example, the length of the first conductive portion 136 and the second conductive portion 138 is a, the width is b, the vertical distance between the first conductive portion 136 and the second conductive portion 138 is d, and the capacitance value of the first capacitor 120 satisfies c=εs/4πkd, where C represents the capacitance value and ε represents the dielectric constant between the first conductive portion 136 and the second conductive portion 138; k identifies the electrostatic force constant; s denotes the bipolar plate facing area, s=a×b.

Further, fig. 6 shows a graph of the relation between the impedance of the capacitor and the frequency, fig. 7 shows an equivalent circuit diagram of the capacitor, taking fig. 6 as an example, the abscissa represents the frequency of the capacitor, the ordinate represents the impedance of the capacitor, the impedance represents the capacitance before the frequency reaches the resonance frequency, the impedance decreases with increasing frequency, the capacitance represents the inductance after the frequency reaches the resonance frequency, and the impedance increases with increasing frequency. Fig. 7 is an equivalent circuit diagram of the first capacitor 120, wherein the equivalent capacitor 1202 is connected in parallel with the equivalent resistor 126, the equivalent capacitor 1202 is connected in series with the equivalent impedance 124, and the equivalent capacitor 1202 is connected in series with the equivalent inductor 122.

The resonant frequency can be expressed as:

Where f represents the resonant frequency of the capacitor, C represents the capacitance value, and ESL represents the inductance value of the equivalent series. It will be appreciated that the smaller the capacitance, the smaller the inductance of the equivalent series, and the higher the resonant frequency. When the high-frequency filtering unit is constructed, the capacitor is connected in parallel in the circuit to be grounded, so that the high-frequency signal is guided to be grounded, noise generated by the high-frequency signal is eliminated, the high-frequency noise is eliminated, meanwhile, the transmission of the low-frequency signal is not influenced, the capacitor is connected in series in the circuit, the high-frequency signal is guided to pass through, the low-frequency signal is prevented from passing through, noise interference caused by the high-frequency signal capable of filtering the radio-frequency unit is eliminated, interference of the radio-frequency unit on the pressure sensing signal is reduced, the capacity of the pressure sensing circuit 101 for resisting the interference of the radio-frequency unit is improved, the accuracy of identifying the pressure sensing signal is improved, and the quality of signal transmission is ensured.

As shown in fig. 8, in some embodiments of the present application, each band-pass filtering unit 142 of the plurality of band-pass filtering units 142 includes: a high-pass filtering unit and a low-pass filtering unit; the low-pass filtering unit is connected with the high-pass filtering unit in series; wherein the cut-off frequency of the low-pass filtering unit is greater than the cut-off frequency of the high-pass filtering unit.

Specifically, fig. 8 shows a block diagram of a band-pass filter unit 142 constituted by combining a high-pass filter unit and a low-pass filter unit; wherein Input represents a signal Input terminal, output represents a signal output terminal, and GND represents a grounding device.

Further, fig. 9 shows the frequency characteristics of the band-pass filter unit 142 composed of a high-pass filter unit and a low-pass filter unit; wherein F0 represents the cut-off frequency of the high-pass filter unit, F1 represents the cut-off frequency of the low-pass filter unit, the cut-off frequency of the filter unit is f=1/(2pi RC), R represents the resistance value, and C represents the capacitance value.

Further, for the band-pass filter unit 142 formed by combining the high-pass filter unit and the low-pass filter unit, the cut-off frequency F0 is smaller than F1, the frequency interval from F0 to F1 is the frequency passband, and the band-pass filter unit 142 allows the signal generated by the frequency in the frequency passband to pass; the frequency ranges below F0 and above F1 are frequency stop bands, and the band-pass filter unit 142 suppresses the passage of signals generated by the frequencies of the frequency stop bands.

It will be appreciated that the band-pass filter unit 142 formed by combining the high-pass filter unit and the low-pass filter unit defines a section of the cut-off frequency, so that signals generated by frequencies in the section can be allowed to pass when the pressure sensing signal is transmitted, and more signals can be allowed to pass compared with the case that only the high-pass filter unit and only the low-pass filter unit are used, thereby facilitating the transmission of the pressure sensing signal.

Further, as shown in fig. 10 and 11, a resistor is provided on the substrate 102, the resistor including a third conductive portion 146 and a fourth conductive portion 148, and a conductive medium 150 is provided between the third conductive portion 146 and the fourth conductive portion 148.

Specifically, the third conductive portion 146 and the fourth conductive portion 148 may be made of a metal material such as aluminum, molybdenum, and titanium, and the conductive medium 150 may be provided as a metal wire.

Further, the working principle of the resistor is shown in fig. 12, where the resistance value of the resistor can be expressed as: r=ρ×l/S, taking fig. 12 as an example, ρ represents the resistivity of the conductive medium 150, L represents the length of the conductive medium 150, S represents the cross-sectional area of the conductive medium 150, and s=a×b, the resistance value can be adjusted by adjusting the length of the conductive medium 150, the cross-sectional area of the conductive medium 150.

The parallel resistor is grounded in the circuit, so that the low-frequency noise is guided to be grounded, the noise generated by the low-frequency signal is eliminated, and the transmission of the high-frequency signal is not influenced while the low-frequency noise is eliminated; the resistors are connected in series in the circuit to guide low-frequency signals to pass through and prevent high-frequency signals from passing through, so that interference of the radio frequency unit 208 on the pressure sensing signals is reduced, the capacity of the pressure sensing circuit 101 for resisting the interference of the radio frequency unit 208 is improved, the accuracy of pressure sensing signal identification is improved, and the quality of signal transmission is ensured.

As shown in fig. 13, in some embodiments of the present application, the high-pass filtering unit includes: a second capacitor 128 and a first resistor 130, the second capacitor 128 being connected to a first end of the plurality of second switches 144; a first terminal of the first resistor 130 is connected to a second terminal of the second capacitor 128, and a second terminal of the first resistor 130 is grounded.

Specifically, the second capacitor 128 is connected in series to the transmission circuit 106, the second capacitor 128 is connected to the first ends of the plurality of second switches 144, the first end of the first resistor 130 is connected to the second end of the second capacitor 128, and the second end of the first resistor 130 is grounded, so as to ensure the safety of circuit connection.

Further, in fig. 13, input represents a signal Input terminal, output represents a signal output terminal, and GND represents a ground device.

Further, fig. 14 shows the frequency characteristics of the high-pass filtering unit; for the high-pass filtering unit, a signal generated by a frequency lower than F0 is positioned in a stop band region of the high-pass filtering unit, and the high-pass filtering unit has an inhibition effect on the signal; the signal generated by the frequency higher than F0 is positioned in the passband region of the high-pass filtering unit, and the high-pass filtering unit does not influence the transmission of the signal.

As shown in fig. 15, in some embodiments of the present application, the low-pass filtering unit includes: a second resistor 134 and a third capacitor 132, a first end of the second resistor 134 being connected to a second end of the second capacitor 128, a second end of the second resistor 134 being connected to the ultrasound circuitry 108; a first terminal of the third capacitor 132 is connected to a second terminal of the second resistor 134, and a second terminal of the third capacitor 132 is grounded.

Specifically, a second resistor 134 and a third capacitor 132, a first end of the second resistor 134 being connected to a second end of the second capacitor 128, a second end of the second resistor 134 being connected to the ultrasound circuit 108; the first end of the third capacitor 132 is connected to the second end of the second resistor 134, and the second end of the third capacitor 132 is grounded, so that the pressure sensing circuit 101 is in communication with the ultrasonic circuit 108.

Further, in fig. 15, input represents a signal Input terminal, output represents a signal output terminal, and GND represents a ground device.

Further, fig. 16 shows the frequency characteristics of the low-pass filtering unit; f1 represents the cut-off frequency of the low-pass filter unit, and for the low-pass filter unit, the signal generated by the frequency lower than F1 is located in the passband region of the low-pass filter unit, and the low-pass filter unit does not affect the transmission of the signal; the signal generated by the frequency higher than F1 is positioned in the stop band region of the low-pass filtering unit, and the low-pass filtering unit has a suppression effect on the signal.

It will be appreciated that the capacitance is characterized by allowing high frequency signals to pass, preventing low frequency signals from passing, and the resistance is characterized by allowing low frequency signals to pass, preventing high frequency signals from passing, and the configuration, materials, number and specific form of the capacitance, resistance, and the number of filter elements and the specific arrangement of the circuit layer 104 on the substrate 102 are not limited in this application.

As shown in fig. 3, in some embodiments of the present application, the pressure sensing circuit 101 includes a wheatstone bridge 152 and a third switch 154; the wheatstone bridge 152 is disposed on the substrate 102 and connected to the transmission circuit 106; a third switch 154 is provided in the transmission circuit 106 and is capable of controlling the wheatstone bridge 152 to be connected to or disconnected from the ultrasound circuit 108.

Specifically, the wheatstone bridge 152 is adopted, so that accuracy of pressure sensing signal transmission can be improved, the wheatstone bridge 152 is connected with the transmission circuit 106, smooth transmission of the pressure sensing signal can be guaranteed, the third switch 154 can control connection or disconnection of the wheatstone bridge 152 and the ultrasonic circuit 108, control of the pressure sensing circuit 101 and the ultrasonic circuit 108 can be achieved, and loss of electric energy in the circuit is reduced.

Further, the first switch 116, the second switch 144 and the third switch 154 may be thin film transistor switches (TFTs, thin Film Transistor), which saves installation space, is separately controlled, and reacts rapidly, thereby ensuring the transmission of the pressure sensing signal in the circuit.

Further, as shown in fig. 17, the thin film transistor switch is provided with a source 168, a gate 170 and a drain 172, wherein the substrate 102 between the source 168, the gate 170 and the drain 172 may be made of metal, silicon nitride, amorphous silicon, doped amorphous silicon, etc., and the on-off of the source 168 and the drain 172 is controlled by adjusting the voltage of the gate 170, so as to realize on-off of the circuit.

Further, applying a voltage to the gate 170 may form a vertical electric field, changing the carrier density in the amorphous silicon in the electric field. When the carrier density of the amorphous silicon reaches the first value, the first value can be set in advance by a user, and is used for judging whether to control the conduction of the source electrode 168 and the drain electrode 172, and the conduction of the source electrode 168 and the drain electrode 172 is approximate to short circuit; when the carrier density of amorphous silicon reaches the second value, the second value may be set in advance by a user to determine whether to control the source 168 and the drain 172 to be disconnected, and approximately open, thereby manufacturing a TFT unit.

As shown in fig. 18 and 19, in some embodiments of the present application, the fingerprint module 100 further includes: a copolymer layer 156, a silver paste layer 158, and a black film layer 160, wherein the copolymer layer 156 is disposed on a side of the substrate 102 remote from the circuit layer 104; the silver paste layer 158 is disposed on a side of the copolymer layer 156 remote from the substrate 102; the black matrix layer 160 is disposed on the side of the silver paste layer 158 remote from the copolymer layer 156.

Specifically, the copolymer layer 156 can reduce the thickness of the fingerprint module 100, and can resist flame, so that the use safety is ensured, and the use of polymeric materials such as resin and the like is more environment-friendly; the silver paste layer 158 can ensure that the fingerprint module 100 has better conductivity, ensure smooth transmission of pressure sensing signals and ensure the quality of signal transmission; the black film 160 can accelerate heat dissipation, which is beneficial to rapid heat dissipation.

As shown in fig. 18 and 19, in some embodiments of the present application, the fingerprint module 100 further includes a first adhesive layer 162, a copper layer 164, and a second adhesive layer 166; wherein the first adhesive layer 162 covers the circuit layer 104; the copper layer 164 is disposed on a side of the first adhesive layer 162 away from the circuit layer 104; the second glue layer 166 is disposed on a side of the copper layer 164 away from the first glue layer 162.

Specifically, the first adhesive layer 162 ensures connection between the circuit layer 104 and the copper layer 164, the copper layer 164 can ensure smooth transmission of fingerprint identification signals, and the second adhesive layer 166 can ensure connection of the copper layer 164 with the outside.

As shown in fig. 20, according to a control method of a fingerprint module according to some embodiments of the present application, the control method of a fingerprint module is used for controlling the fingerprint module 100 of any one of the above embodiments, and the control method of a fingerprint module includes:

s2002, when the pressure sensing circuit is pressed, the switch corresponding to the first filtering unit in the plurality of switches is controlled to be conducted according to the working mode of the radio frequency unit and/or the working mode of the pressure sensing circuit so as to enable the first filtering unit to filter.

Specifically, the first filtering unit is at least one filtering unit corresponding to an operation mode of the radio frequency unit 208 and/or an operation mode of the pressure sensing circuit 101 among the plurality of filtering units.

Further, according to the working mode of the radio frequency unit 208 and/or the working mode of the pressure sensing circuit 101, the switch corresponding to the first filtering unit in the plurality of switches is controlled to be turned on, so that the control of the filtering module 110 is realized, the filtering module 110 can be matched with the filtered signal according to the matching of the filtered signal, and the filtering unit is controlled to filter the signal, so that the filtering unit saves more electricity and energy, the filtering effect of the filtering unit is improved, the anti-interference capability of the pressure sensing signal and the radio frequency signal is improved, the accuracy of signal transmission is ensured, and the quality of signal transmission is ensured.

As shown in fig. 21, in some embodiments of the present application, a control method of a fingerprint module includes:

s2102, acquiring a network working frequency band of a radio frequency unit;

s2104, determining at least one high-frequency filtering unit corresponding to the network working frequency band according to the network working frequency band;

s2106, controlling a switch corresponding to the at least one high-frequency filtering unit from among the plurality of switches to be turned on for filtering by the at least one high-frequency filtering unit.

Further, the network working frequency band of the radio frequency unit 208 is obtained, and at least one high frequency filtering unit 114 corresponding to the network working frequency band is determined according to the network working frequency band, so that the processing efficiency of the high frequency filtering unit 114 can be improved, the filtering effect of the high frequency filtering unit 114 on different radio frequency signals can be improved, the capability of the pressure sensing circuit 101 for resisting external interference can be improved, the identification accuracy and the transmission accuracy of the pressure sensing signals can be ensured, and the quality of signal transmission can be ensured.

As shown in fig. 22, in some embodiments of the present application, a control method of a fingerprint module includes:

s2202, under the condition that the pressure sensing circuit is pressed, reading the working state register setting of the radio frequency unit;

s2204, determining the network working frequency band of the radio frequency unit according to the working state register setting of the radio frequency unit;

s2206, determining at least one high-frequency filtering unit corresponding to the network working frequency band according to the network working frequency band;

s2208 controls the switch corresponding to the at least one high frequency filter unit of the plurality of switches to be turned on to filter by the at least one high frequency filter unit.

Further, the working status register of the rf unit 208 stores different working statuses of the rf unit 208 in advance, and when the pressure sensing circuit 101 is pressed, the working status register setting of the rf unit 208 is read, and the network working frequency band of the rf unit 208 is determined according to the working status register setting of the rf unit 208.

Specifically, the setting of the working status register of the radio frequency unit 208 refers to the setting of the current working status register of the radio frequency unit 208, so as to determine the high frequency filtering unit 114 corresponding to the network working frequency band of the radio frequency unit 208, thereby controlling the switch corresponding to at least one high frequency filtering unit 114 to be turned on in the plurality of switches, so as to filter by the at least one high frequency filtering unit 114, and match the high frequency filtering unit 114 with the network working frequency band, thereby improving the processing efficiency of the high frequency filtering unit 114, improving the filtering effect of the high frequency filtering unit 114 on different radio frequency signals, increasing the capability of the pressure sensing circuit 101 for resisting external interference, ensuring the accuracy of identifying and transmitting the pressure sensing signals, and ensuring the quality of signal transmission.

As shown in fig. 23, in some embodiments of the present application, a control method of a fingerprint module includes:

s2302, under the condition that the pressure sensing circuit is pressed, reading the current working state register setting of the radio frequency unit;

s2304, determining the network working frequency band of the radio frequency unit according to the working state register setting of the radio frequency unit;

s2306, determining at least one high-frequency filtering unit corresponding to the network working frequency band according to the network working frequency band;

s2308, obtaining the working frequency of a third switch of the pressure sensing circuit;

s2310, determining at least one band-pass filtering unit corresponding to the working frequency according to the working frequency;

and S2312, controlling a switch corresponding to the at least one band-pass filtering unit in the plurality of switches to be turned on so as to filter by the at least one band-pass filtering unit.

Further, the present application determines the at least one band-pass filtering unit 142 corresponding to the operating frequency according to the operating frequency by obtaining the operating frequency of the third switch 154, so as to purposefully control the switch corresponding to the at least one band-pass filtering unit 142 in the plurality of switches to be turned on, so as to filter by the at least one band-pass filtering unit 142, reduce the uneven impedance distribution of the pressure sensing circuit 101, reduce the interference caused by the clutter generated by the rising edge of the signal on different rf antennas 210, thereby increasing the anti-interference capability of the rf antennas 210 on the pressure sensing circuit 101, thereby ensuring the transmission of the signal between the rf antennas 210 and the pressure sensing circuit 101, ensuring the quality of the signal transmission, and improving the performance of the fingerprint module 100.

As shown in fig. 24, in some embodiments of the present application, a control method of a fingerprint module includes:

s2402, under the condition that the pressure sensing circuit is pressed, reading the working state register setting of the radio frequency unit;

s2404, determining a network working frequency band of the radio frequency unit according to the working state register setting of the radio frequency unit;

s2406, determining at least one high-frequency filtering unit corresponding to the network working frequency band according to the network working frequency band;

s2408, acquiring the working frequency of a third switch of the pressure sensing circuit;

s2410, determining at least one band-pass filtering unit corresponding to the working frequency according to the working frequency;

s2412, controlling a switch corresponding to at least one band-pass filtering unit among the plurality of switches to be turned on so as to filter by the at least one band-pass filtering unit;

s2414, when the pressure sensing circuit is pressed, generating a pressure sensing signal;

s2416, determining a force with which the pressure sensing circuit is pressed based on the filtered pressure sensing signal;

s2418, controlling the motor to generate vibration corresponding to the pressed force according to the pressed force of the pressure sensing circuit.

Specifically, in the case where the pressure-sensing circuit 101 is pressed, a pressure-sensing signal is generated by the pressure-sensing circuit 101.

Further, after the switches corresponding to the at least one band-pass filtering unit 142 among the plurality of switches are controlled to be turned on to be filtered by the at least one band-pass filtering unit 142, a pressure sensing signal is generated based on the fact that the pressure sensing circuit 101 is pressed, the pressed force of the pressure sensing circuit 101 is determined, the motor is controlled to generate vibration corresponding to the pressed force according to the pressed force of the pressure sensing circuit 101, fingerprint identification of a user can be fed back to the user through the mode of vibration, and the use experience of the user is improved.

As shown in fig. 25, according to the apparatus of the fingerprint module 100 of some embodiments of the present application, the control apparatus of the fingerprint module 100 is configured to control the fingerprint module 100 of any one of the above embodiments, and the control apparatus of the fingerprint module 100 includes:

a control unit, configured to control, based on the pressure sensing circuit 101 being pressed, on a switch corresponding to the first filtering unit from the plurality of switches according to an operation mode of the radio frequency unit 208 and/or an operation mode of the pressure sensing circuit 101, so as to enable the first filtering unit to perform filtering; the first filtering unit is at least one filtering unit corresponding to an operation mode of the radio frequency unit 208 and/or an operation mode of the pressure sensing circuit 101.

Further, the control unit controls the switch corresponding to the first filtering unit among the plurality of switches to be turned on according to the working mode of the radio frequency unit 208 and/or the working mode of the pressure sensing circuit 101 based on the pressure sensing circuit 101 being pressed, so that the first filtering unit filters, interference of different radio frequency antennas 210 to the pressure sensing circuit 101, uneven distribution of internal impedance of the pressure sensing circuit 101 and interference of signal rising edges to different radio frequency antennas 210 are filtered, accuracy of signal transmission between the pressure sensing circuit 101 and the radio frequency unit 208 is improved, and the first filtering unit is at least one filtering unit corresponding to the working mode of the radio frequency unit 208 and/or the working mode of the pressure sensing circuit 101 among the plurality of filtering units.

Further, as shown in fig. 25, the electronic device 200 further includes: a housing and display 204; the display 204 is connected with the housing; the fingerprint module 100 is attached to a side of the display 204 facing the housing.

Further, the electronic device 200 is provided with a fingerprint area 206, the fingerprint module 100 is attached to one side of the display screen 204 facing the housing, and the user can identify through the fingerprint area 206, so that the use experience of the user is improved.

Specifically, the control component may be a central processing unit 202, an Interrupt signal (INT, interrupt) may be sent between the central processing unit 202 and the ultrasonic circuit 108, and a serial peripheral interface (SPI, serial Peripheral Interface) may be connected between the ultrasonic circuit 108 and the central processing unit 202.

As shown in fig. 26, the central processing unit 202 is connected to a radio frequency unit 208, and the radio frequency unit 208 is connected to different antennas, which may be 2G/3G/4G/5G antennas or different frequency antennas. The central processing unit 202 and the ultrasonic circuit 108 are linked to intelligently start the filtering unit, so that clutter interference generated by the circuit layer 104 can be filtered, interference of different antennas can be filtered, and signal transmission is ensured.

As shown in fig. 27, the user's finger presses the ultrasonic fingerprint area of the screen, performing an unlocking operation; the central processing unit reads the current working state register setting of the radio frequency IC; the finger acts on the ultrasonic fingerprint area of the screen, the ultrasonic fingerprint deformation enables the Wheatstone bridge to generate a pressure induction signal, and the CPU (central processing unit) judges the current mode of the radio frequency according to the read working state register of the radio frequency IC; the CPU judges what kind of filtering mode is triggered under the current radio frequency mode condition, the pressure sensing circuit 101 of the pressure sensing ultrasonic fingerprint has the best filtering effect (the corresponding relation between the radio frequency mode and the filtering mode is preset by software); after the CPU selects the filter circuit, selecting a corresponding TFT switch combination (the corresponding relation between a software preset filter mode and the TFT switch); the CPU sends a selected TFT on/off command to the ultrasonic fingerprint; the ultrasonic fingerprint decodes the TFT switch instruction sent by the CPU; the ultrasonic circuit 108 converts the digital signal decoded by the TFT switch instruction into an analog signal capable of controlling the TFT switch of the pressure sensing circuit 101; the analog signal performs an on/off operation on the TFT switch of the pressure sensing circuit; receiving a Wheatstone bridge pressure sensing signal when the TFT is turned on, and switching off the Wheatstone bridge pressure sensing signal when the TFT is turned off; the ultrasonic circuit converts the digital signal decoded by the TFT switch instruction into an analog signal capable of controlling the TFT switch of the filter circuit; the analog signal performs on/off actions on the TFT switch of the filter circuit; when the TFT switch is turned on, a filter circuit is turned on; when the TFT switch is turned off, the filter circuit is turned off; the filter circuit acts on the pressure sensing signal generated by the Wheatstone bridge 152; the filter circuit filters the pressure sensing signals to generate pressure sensing signals; the filtered pressure sensing signals are transmitted back to the ultrasonic circuit, the ultrasonic circuit encodes the pressure sensing signals and converts the pressure sensing signals into pressure sensing signals which can be identified by the CPU; the CPU recognizes the pressure sensing signal and judges the degree of the pressure sensing (the pressure of the finger to the screen); the CPU sends a vibration instruction of corresponding degree to the motor according to the degree of the pressure sense; the motor IC recognizes the CPU instruction and converts the CPU instruction into a motor driving signal; motor vibration: the motor receives the driving signal and performs corresponding vibration action; the vibration of the motor acts on the finger and the process ends.

As shown in fig. 28, according to the control device 300 of the fingerprint module according to some embodiments of the present application, the control device 300 of the fingerprint module includes a memory 214 and a processor 212, the memory 214 stores a program or an instruction that can be executed on the processor 212, and the program or the instruction realizes the steps of the control method of the fingerprint module according to any one of the embodiments described above when executed by the processor 212, and can achieve the same technical effects, so that repetition is avoided and redundant description is omitted.

It should be noted that, the electronic device 200 in the embodiment of the present application includes the mobile electronic device 200 and the non-mobile electronic device 200 of any of the above embodiments.

Some embodiments of the present application further provide a readable storage medium, on which a program or an instruction is stored, where the program or the instruction implements the steps of the control method of the fingerprint module according to any one of the embodiments described above when executed by the processor 212, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The processor 212 is the processor 212 in the electronic device 200 in the above embodiment. Readable storage media include computer readable storage media such as computer Read-Only Memory 214 (ROM), random access Memory 214 (Random Access Memory, RAM), magnetic or optical disks, and the like.

The processor 212 may include one or more processing units; optionally, the processor 212 integrates an application processor 212 and a modem processor 212, wherein the application processor 212 primarily handles operations related to an operating system, user interface, application programs, etc., and the modem processor 212 primarily handles wireless communication signals, such as a baseband processor 212. It will be appreciated that the modem processor 212 described above may not be integrated into the processor 212. The application processor 212 and the modem processor 212 may be integrated, wherein the application processor 212 primarily handles operating systems, user interfaces, applications, etc., and the modem processor 212 primarily handles wireless communications. It will be appreciated that the modem processor 212 described above may not be integrated into the processor 212.

An electronic device 200 according to some embodiments of the present application includes: the fingerprint module 100 of any of the above embodiments; or the control device of the fingerprint module 100 of any of the above embodiments; or a readable storage medium of the above embodiments.

The electronic device 200 in the embodiment of the present application may be a terminal, or may be other devices besides a terminal. For example, the mobile electronic device 200 may be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device 200, a mobile internet device (Mobile Internet Device, MID), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device 200 may also be a personal computer (personal computer, PC), a Television (TV), a teller machine or a self-service machine, etc., which are not limited in this embodiment.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

1. The control method of the fingerprint module is characterized in that the fingerprint module comprises a substrate and a circuit layer, wherein the circuit layer is arranged on the substrate, the circuit layer comprises a pressure sensing circuit, a transmission circuit, a filtering module and an ultrasonic circuit, and a first end of the transmission circuit is connected with the pressure sensing circuit; the filter module comprises a plurality of filter units and a plurality of switches, wherein first ends of the switches are respectively connected with the filter units, and second ends of the switches are connected with the transmission circuit; the ultrasonic circuit is connected with the second end of the transmission circuit, and the control method of the fingerprint module comprises the following steps:

Under the condition that the pressure sensing circuit is pressed, controlling a switch corresponding to a first filtering unit in the plurality of switches to be conducted according to the working mode of a radio frequency unit in electronic equipment and/or the working mode of the pressure sensing circuit so as to enable the first filtering unit to filter;

the first filtering unit is at least one filtering unit corresponding to the working mode of the radio frequency unit and/or the working mode of the pressure sensing circuit in the plurality of filtering units;

the controlling the switch corresponding to the first filtering unit to be turned on according to the working mode of the radio frequency unit and/or the working mode of the pressure sensing circuit, so that the first filtering unit performs filtering includes:

acquiring a network working frequency band of the radio frequency unit;

according to the network working frequency band, determining at least one high-frequency filtering unit corresponding to the network working frequency band;

controlling a switch corresponding to the at least one high-frequency filtering unit in the plurality of switches to be conducted so as to filter by the at least one high-frequency filtering unit; and/or

Acquiring the working frequency of a third switch of the pressure sensing circuit;

determining at least one band-pass filtering unit corresponding to the working frequency according to the working frequency;

and controlling the switch corresponding to the at least one band-pass filtering unit in the plurality of switches to be conducted so as to filter through the at least one band-pass filtering unit.

2. The method for controlling a fingerprint module according to claim 1, wherein the obtaining the network operating frequency band of the radio frequency unit includes:

reading the working state register setting of the radio frequency unit under the condition that the pressure sensing circuit is pressed;

and determining the network working frequency band of the radio frequency unit according to the working state register setting of the radio frequency unit.

3. The method according to claim 1 or 2, wherein after controlling the switch corresponding to the first filtering unit among the plurality of switches to be turned on according to the operation mode of the radio frequency unit and/or the operation mode of the pressure sensing circuit so as to filter the first filtering unit, the method further comprises:

generating a pressure-sensitive signal when the pressure-sensitive circuit is pressed;

Determining the force with which the pressure sensing circuit is pressed based on the filtered pressure sensing signal;

and controlling a motor to generate vibration corresponding to the pressed force according to the pressed force of the pressure sensing circuit.

4. The control device of the fingerprint module is characterized by comprising a substrate and a circuit layer, wherein the circuit layer is arranged on the substrate and comprises a pressure sensing circuit, a transmission circuit, a filtering module and an ultrasonic circuit, and a first end of the transmission circuit is connected with the pressure sensing circuit; the filter module comprises a plurality of filter units and a plurality of switches, wherein first ends of the switches are respectively connected with the filter units, and second ends of the switches are connected with the transmission circuit; the ultrasonic circuit is connected with the second end of the transmission circuit, and the control device of the fingerprint module comprises:

the control unit is used for controlling the switch corresponding to the first filtering unit in the plurality of switches to be conducted according to the working mode of the radio frequency unit in the electronic equipment and/or the working mode of the pressure sensing circuit based on the pressed pressure sensing circuit so as to enable the first filtering unit to filter;

acquiring a network working frequency band of the radio frequency unit;

5. A control device for a fingerprint module, comprising a memory and a processor, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the control method for a fingerprint module as claimed in any one of claims 1 to 3.

6. A readable storage medium having stored thereon a program or instructions, which when executed by a processor, implement the steps of the control method of a fingerprint module as claimed in any one of claims 1 to 3.

7. A fingerprint module, wherein the fingerprint module is controlled by the fingerprint module control method according to any one of claims 1 to 3, the fingerprint module comprises a substrate and a circuit layer, the circuit layer is disposed on the substrate, and the circuit layer comprises:

a pressure sensing circuit;

the first end of the transmission circuit is connected with the pressure sensing circuit;

the filter module comprises a plurality of filter units and a plurality of switches, wherein first ends of the switches are respectively connected with the filter units, and second ends of the switches are connected with the transmission circuit;

And the ultrasonic circuit is connected with the second end of the transmission circuit.

8. The fingerprint module of claim 7, wherein the fingerprint module comprises a plurality of fingerprint modules,

the plurality of filtering units comprise a plurality of high-frequency filtering units, the plurality of switches comprise a plurality of first switches, the first ends of the plurality of high-frequency filtering units are grounded, the second ends of the plurality of high-frequency filtering units are respectively connected with the first ends of the plurality of switches, and the second ends of the plurality of switches are connected with the transmission circuit;

the plurality of high frequency filtering units are capable of filtering high frequency signal interference.

9. The fingerprint module of claim 8, wherein each of the plurality of high frequency filter units comprises:

and the first end of the first capacitor is connected with one first switch in the plurality of first switches, and the second end of the first capacitor is grounded.

10. The fingerprint module of claim 7, wherein the fingerprint module comprises a plurality of fingerprint modules,

the plurality of filtering units comprise a plurality of band-pass filtering units, the plurality of switches comprise a plurality of second switches, the first ends of the plurality of filtering units are connected with the ultrasonic circuit, the second ends of the plurality of filtering units are respectively connected with the first ends of the plurality of second switches, and the second ends of the plurality of second switches are connected with the transmission circuit;

The plurality of band pass filter units are capable of filtering signals from the pressure sensing circuit.

11. The fingerprint module of claim 10, wherein each of the plurality of bandpass filtering units comprises:

a high-pass filtering unit;

the low-pass filtering unit is connected with the high-pass filtering unit in series;

wherein the cut-off frequency of the low-pass filtering unit is greater than the cut-off frequency of the high-pass filtering unit.

12. The fingerprint module of claim 11, wherein the high-pass filtering unit comprises:

a second capacitor connected to the first ends of the plurality of second switches;

and the second end of the first resistor is grounded.

13. The fingerprint module of claim 12, wherein the low-pass filtering unit comprises:

the first end of the second resistor is connected with the second end of the second capacitor, and the second end of the second resistor is connected with the ultrasonic circuit;

and the first end of the third capacitor is connected with the second end of the second resistor, and the second end of the third capacitor is grounded.

14. The fingerprint module of any one of claims 7-13, wherein the pressure sensing circuit comprises:

the Wheatstone bridge is arranged on the substrate and connected with the transmission circuit;

and the third switch is arranged on the transmission circuit and can control the Wheatstone bridge to be connected or disconnected with the ultrasonic circuit.

15. An electronic device, comprising:

a fingerprint module according to any one of claims 7 to 14; or (b)

The control device of a fingerprint module set according to claim 4; or (b)

The control device of a fingerprint module according to claim 5; or (b)

The readable storage medium of claim 6.