TW202345106A - Wireless fingerprint sensing system - Google Patents

Abstract

A wireless fingerprint sensing system is used for an electronic apparatus with wireless communication function and includes a fingerprint sensing module, a wireless charging-reception circuit and a wireless communication circuit, wherein the effective sensing area of the fingerprint sensing module is not less than 1 square centimeters. After the wireless fingerprint sensing system senses a user fingerprint image, the wireless fingerprint sensing system authenticates user identity and sends the authentication result to the electronic apparatus through wireless signal, or the wireless fingerprint sensing system sends the fingerprint image data to the electronic apparatus through wireless signal for authenticating user identity by the electronic apparatus.

Description

Wireless fingerprint detection system

The present invention relates to a wireless fingerprint detection system, in particular to a wireless fingerprint detection system that provides non-contact signal transmission and fingerprint identification.

For general mobile electronic devices, such as smartphones or tablets, most fingerprint recognition devices are built under the screen or next to the casing. The fingerprint sensing area is limited and cannot provide accurate user identity authentication. In some sensitive operations, such as making mobile payments using smartphones, there is a risk of unauthorized users stealing the information.

In addition, there are also external fingerprint recognition devices on the market. Although this external fingerprint recognition device has a larger fingerprint sensing area, most of the conventional external fingerprint recognition devices use a physical interface (such as a Type C plug). When connected to a mobile electronic device, frequent plugging and unplugging may cause damage to the external fingerprint recognition device. Therefore, there is still a lot of room for improvement in the fingerprint recognition technology of mobile electronic devices.

In order to improve the shortcomings of the above-mentioned conventional technologies, the object of the present invention is to provide a wireless fingerprint detection system. This wireless fingerprint detection system is used in an electronic device with wireless communication functions to provide non-contact signal transmission and fingerprint identify. In order to achieve the above objectives, the present invention provides a wireless fingerprint detection system, including: a shell containing a planar body; A fingerprint sensing module is provided on the housing and includes: a substrate; A plurality of sensing elements are arranged on the substrate. The plurality of sensing elements are arranged vertically and horizontally to form a matrix of sensing elements. The effective detection area of the matrix of sensing elements is not less than 1 square centimeter; A plurality of transistor switches are disposed on the substrate, and each transistor switch corresponds one-to-one to one of the sensing elements; A plurality of sensing data lines and a plurality of gate lines are respectively arranged vertically and horizontally on the substrate. Each gate line is electrically connected to the plurality of transistor switches. Each data line is electrically connected to a plurality of transistor switches. transistor switches; and a fingerprint detection circuit electrically connected to the plurality of sensing elements; A wireless charging receiving circuit is electrically connected to the fingerprint sensing module and the fingerprint detection circuit, the wireless charging receiving circuit includes at least a first induction coil; and A wireless communication circuit is electrically connected to the wireless charging receiving circuit and can perform near field communication with the electronic device.

For detailed description and technical content of the present invention, please refer to the following detailed description and drawings. The drawings and detailed description are only for illustration and are not intended to limit the present invention.

Referring to FIG. 1A , a schematic diagram of a wireless fingerprint detection system 60 for an electronic device 80 according to the present invention is illustrated. The electronic device 80 shown in FIG. 1A may be, for example, a smart phone, and the wireless fingerprint detection system 60 of the present invention may be made in the form of a mobile phone protective case and include a casing 61 . The housing 61 includes a planar main body 62 and a plurality of side walls 64 provided at each edge of the planar main body 62 and connected with the planar main body 62 to form a receiving space. This accommodation space is suitable for placing the electronic device 80 (ie, a smart phone or tablet) and providing anti-collision or anti-scratch protection for the electronic device 80 . The wireless fingerprint detection system 60 of the present invention at least includes a fingerprint sensing module 10, a wireless charging receiving circuit 20, and a wireless communication circuit (RF tag) 30. The wireless fingerprint detection system 60 can transmit data with the electronic device 80 through the wireless communication circuit 30 and receive operating power from the electronic device 80 through the wireless communication circuit 30 and/or the wireless charging receiving circuit 20 . Furthermore, because the fingerprint sensing module 10 is disposed on the wireless fingerprint detection system 60 outside the electronic device 80 (for example, on the outer wall of the planar main body 62 of the wireless fingerprint detection system 60), the fingerprint detection function of the fingerprint sensing module 10 is The detection (sensing) area can be larger than the area of a conventional smartphone or tablet fingerprint sensing module, for example, the effective fingerprint detection area is not less than 1 square centimeter. If the electronic device 80 needs to perform sensitive operations, such as unlocking the electronic device 80, encrypting or decrypting files, access control management, electronic payment or transfer procedures, the fingerprint sensing module 10 provided in the wireless fingerprint detection system 60 can provide More accurate identification (see details below). Furthermore, the fingerprint sensing module 10 of the wireless fingerprint detection system 60 can also be disposed on a surface of a planar body that is attached to the housing 61 , for example, on the side of the plane body that is attached to the housing that faces away from the electronic device. The surface of one side of 80° can provide users with fingerprint pressing. Therefore, the implementation of the wireless fingerprint detection system 60 is not limited to the form of a mobile phone or tablet protective case, and can be implemented as long as it can provide a structure on which the fingerprint sensing module 10 is mounted on any surface (such as a single-chip structure similar to a credit card). Wireless fingerprint detection system 60 of the present invention.

Referring to FIG. 1B , which is a partial circuit diagram of the wireless fingerprint detection system 60 of the present invention. The wireless charging receiving circuit 20 as shown in FIG. 1A further includes a first induction coil 22, a rectifier circuit (rectifier) 24 and a capacitor 26; the wireless communication circuit 30 further includes a second induction coil 32 and a communication processor 34 . The wireless charging receiving circuit 20 is a conventional technology, so it will not be described in detail here. Those skilled in the art will know that it can further include a control chip to perform communication modulation function. This wireless communication circuit 30 is also a conventional technology. For example, it may further include an AC to DC circuit to convert the radio frequency signal received by the second induction coil 32 into DC power; and a demodulation circuit to convert the radio frequency signal received by the second induction coil 32 into DC power. The radio frequency signal removes the carrier wave and extracts the real modulation signal; the microprocessor is to process the signal from the demodulation circuit; the modulation circuit is to modulate the carrier wave after the information sent by the microprocessor is The two induction coils 32 are sent out; and the memory is used as a location for system operation and storage of identification data.

As shown in Figure 1B, the wireless fingerprint detection system 60 of the present invention further includes a microcontroller (MCU) 40, a security chip 50, an energy storage element 28, a fingerprint detection circuit 12 and a proximity sensor 38; The MCU 40 can be, for example, an STM32 chip from STMicroelectronics, and the security chip 50 can be an ST31 chip from STMicroelectronics, and includes a security core 52 and a memory unit 54 . The proximity sensor 38 can be, for example, an optical, capacitive or inductive proximity sensor, and this is also a conventional technology, so it will not be described in detail here.

According to an embodiment of the present invention, referring to FIGS. 2 and 3 , the size of the first induction coil 22 is larger than the size of the second induction coil 32 for receiving greater operating power. When the user's finger does not approach or touch the wireless fingerprint detection system 60, the wireless fingerprint detection system 60 is in standby mode, and only the wireless communication circuit 30 and the proximity sensor 38 are in operation. In other words, the wireless communication circuit 30 receives the wireless power (first power) from the power coil 82 of the electronic device 80 and maintains the operations of the wireless communication circuit 30 and the proximity sensor 38 . If the proximity sensor 38 senses the approach or contact of the user's finger, it will wake up the MCU 40 and then drive the fingerprint sensing module 10, the fingerprint detection circuit 12 and the security chip 50 to work. In this working mode, the wireless communication circuit 30 will transmit the information of the user's finger contact or proximity to the electronic device 80, so that the electronic device 80 can increase the transmission power. Since the wireless charging circuit 20 is activated, the electronic device 80 performs second power charging on the wireless fingerprint detection system 60 , that is, the power coil 82 of the electronic device 80 transmits wireless power to the first induction coil 22 in the wireless charging circuit 20 . According to the present invention, the first induction coil 22 in the wireless charging circuit 20 is disposed adjacent to the power coil 82 of the electronic device 80 or overlaps each other in the projection direction, so as to improve the energy transfer efficiency. At this time, the fingerprint sensing module 10 can sense a large-sized user fingerprint image, and the fingerprint detection circuit 12 detects the user's fingerprint image and sends it to the MCU 40 to further determine the fingerprint data (for example, it can be: a fingerprint characteristic data , a fingerprint feature comparison result data or a fingerprint image data). This fingerprint data can be transmitted to the security chip 50 via the MCU 40 for comparison with the user information stored in the memory unit 54. If the authentication is successful, the security core 52 extracts the security password stored in the memory unit 54 and uses the password to The MCU 40 and the wireless communication circuit 30 are sent back to the electronic device 80 to perform sensitive operations related to user identity authentication, such as unlocking the electronic device 80, encrypting or decrypting files, access control management, electronic payment or transfer procedures. According to another implementation of the present invention, the fingerprint sensing module 10 can detect a large-sized user fingerprint image, and the fingerprint detection circuit 12 reads the user's fingerprint image and then the MCU 40 determines the fingerprint data. The fingerprint data can be transmitted to the wireless communication circuit 30 via the MCU 40, and then transmitted to the electronic device 80 by the wireless communication circuit 30. The electronic device 80 then performs identity authentication on the user based on the fingerprint data. If the electronic device 80 determines that the authentication is successful, it can perform sensitive operations related to the user's identity authentication, such as unlocking the electronic device 80, encrypting or decrypting files, and access control management. , electronic payment or transfer procedures, etc. The details of the operation of the judgment method of the present invention will be described in detail later in conjunction with other figures.

In addition, although not explicitly shown in FIGS. 2 and 3 , part of the wireless charging receiving circuit 20 and the wireless communication circuit 30 are packaged into an integrated circuit. For example, referring to FIG. 1B , the size of the first induction coil 22 of the wireless charging receiving circuit 20 is larger than the size of the second induction coil 32 . Therefore, the first induction coil 22 of the wireless charging receiving circuit 20 can be disposed outside the integrated circuit, and the wireless charging receiving circuit 20 can be installed outside the integrated circuit. The remaining components of the charging receiving circuit 20 are packaged in the wireless communication circuit 30 into an integrated circuit. Furthermore, part of the wireless charging receiving circuit 20, the wireless communication circuit 30 and the fingerprint detection circuit 12 are packaged into an integrated circuit. Similarly, since the size of the first induction coil 22 of the wireless charging receiving circuit 20 is larger than the size of the second induction coil 32, the first induction coil 22 of the wireless charging receiving circuit 20 can be disposed outside the integrated circuit, and the wireless charging receiving circuit 20 can be arranged outside the integrated circuit. The remaining components of the circuit 20 are packaged in the wireless communication circuit 30 and the fingerprint detection circuit 12 into an integrated circuit. Since the effective detection area of the fingerprint sensor module 10 is not less than 1 square centimeter, if it is not packaged into an integrated circuit with the fingerprint detection circuit 12, the effectiveness of the fingerprint sensor module 10 can be increased more flexibly according to needs. detection area, providing more accurate fingerprint sensing.

Before explaining the specific method of the present invention, the following description will describe the implementation of the fingerprint sensing module 10 in detail with reference to the figures. Referring to FIG. 4A and FIG. 4B , which are respectively a side view and a top view of the fingerprint sensing module 10 in a capacitive sensing implementation. The capacitive fingerprint sensing module 10 includes a protective hard film layer 180, a sensing element layer 140, a transistor switch and wiring layer 112 and a substrate 110 from top to bottom. Referring to FIG. 4B , the sensing element layer 140 includes a plurality of sensing elements (ie, sensing electrodes 142 ), and the transistor switch and wiring layer 112 includes a plurality of transistor switches Q, a plurality of gate lines GL and a plurality of Sensing data line DL. Each transistor switch Q has a one-to-one correspondence with each sensing element (ie, the sensing electrode 142 ). The sensing data lines DL and the gate lines GL are arranged vertically and horizontally on the substrate 110 respectively. Each gate line GL is electrically connected to a plurality of transistor switches Q, and each data line DL is electrically connected to a plurality of transistor switches Q. Transistor switch Q.

The fingerprint detection circuit 12 includes a switch control signal generating circuit 120 and a capacitance detection and switch array control circuit 122. The switch control signal generating circuit 120 is electrically connected to a plurality of transistor switches Q via the gate lines GL and provides control signals to the transistor switches Q to select a single row of sensing elements through switch control. The capacitance detection and switch array control circuit 122 includes a capacitance detection circuit (either a self-capacitance detection circuit or a mutual capacitance detection circuit) 123, and is electrically connected to a plurality of transistors via the sensing data lines DL. Switch Q is used to receive the sensing capacitance value from a single row of sensing elements respectively. By using the fingerprint detection circuit 12 to respectively select the sensing elements arranged in an array for capacitance value detection, the fingerprint image can be detected and the fingerprint data can be further determined (for example, it can be: a fingerprint feature data, a fingerprint feature comparison Result data or a fingerprint image data). According to an embodiment of the present invention, after detecting the fingerprint image on the fingerprint sensing module 10, the fingerprint detection circuit 12 can transmit the fingerprint image to the MCU 40, so that the MCU 40 determines the fingerprint data based on the fingerprint image. .

Referring to FIG. 5A and FIG. 5B , which are respectively a side view and a top view of the piezoelectric sensing (ultrasonic) implementation of the fingerprint sensing module 10 . The piezoelectric fingerprint sensing module 10 includes a substrate 110 from top to bottom, a transistor switch and wiring layer 112, a sensing element layer 140, a piezoelectric material layer 154, a piezoelectric electrode 152 and a passivation layer 182; wherein The sensing element layer 140, the piezoelectric material layer 154, and the piezoelectric electrode 152 are integrated into a piezoelectric element 150. Referring to FIG. 5B , the sensing element layer 140 includes a plurality of sensing elements (ie, piezoelectric sensing electrodes 156 ), and the transistor switch and wiring layer 112 includes a plurality of transistor switches Q, a plurality of gate lines GL and Most of the sensing data lines DL. Each transistor switch Q has a one-to-one correspondence with each sensing element (ie, the piezoelectric sensing electrode 156 ). The sensing data lines DL and the gate lines GL are arranged vertically and horizontally on the substrate 110 respectively. Each gate line GL is electrically connected to a plurality of transistor switches Q, and each data line DL is electrically connected to a plurality of transistor switches Q. Transistor switch Q.

The fingerprint detection circuit 12 includes a switch control signal generating circuit 120 and an ultrasonic detection circuit 124. The switch control signal generating circuit 120 is electrically connected to a plurality of transistor switches Q via the gate lines GL to select a single row of sensing elements. The ultrasonic wave detection circuit 124 includes an ultrasonic oscillator circuit 125 (sound source element), and is electrically connected to a plurality of transistor switches Q via the sensing data lines DL. The ultrasonic wave detection circuit 122 can control the ultrasonic oscillation circuit 125 and apply ultrasonic signals to the piezoelectric electrode 152 to generate ultrasonic waves in the piezoelectric material layer 154 . When the user's finger presses on the substrate 110, the peaks and troughs of the fingerprint will be located at different piezoelectric sensing electrodes 156 and generate different voltages or currents at the piezoelectric sensing electrodes 156. More specifically, the piezoelectric sensing electrode 156 at the location of the crest of the fingerprint will have a larger induced voltage or current, while the piezoelectric sensing electrode 156 at the location of the trough of the fingerprint will have a smaller induced voltage or current. is the induced current. By the fingerprint detection circuit 12 selecting the sensing elements arranged in an array (ie, the piezoelectric sensing electrodes 156 ) for voltage or current value detection, the fingerprint image on the fingerprint sensing module 10 can be obtained. The fingerprint detection circuit 12 can transmit the fingerprint image to the MCU 40, so that the MCU 40 determines the fingerprint data based on the fingerprint image (for example, it can be: a fingerprint feature data, a fingerprint feature comparison result data, or a fingerprint image data) .

Referring to FIG. 6A and FIG. 6B , which are respectively a side view and a top view of the temperature sensing implementation of the fingerprint sensing module 10 . The temperature-sensitive fingerprint sensing module 10 includes a protective hard film layer 180, a sensing element layer 140, a transistor switch and wiring layer 112 and a substrate 110 from top to bottom. Referring to FIG. 6B , the sensing element layer 140 includes heating elements 143 and heat-sensitive elements (heat-sensitive elements) 144 arranged in an array, and each heating element 143 is arranged for a heat-sensitive element 144 . The transistor switch and wiring layer 112 includes a plurality of transistor switches Q, a plurality of gate lines GL and a plurality of sensing data lines DL. Each transistor switch Q has a one-to-one correspondence with each sensing element (ie, the heat sensing element 144 ). The sensing data lines DL and the gate lines GL are arranged vertically and horizontally on the substrate 110 respectively. Each gate line GL is electrically connected to a plurality of transistor switches Q, and each data line DL is electrically connected to a plurality of transistor switches Q. Transistor switch Q.

The fingerprint detection circuit 12 includes a switch control signal generating circuit 120 and a temperature detection and switch array control circuit 126. The switch control signal generating circuit 120 is electrically connected to a plurality of transistor switches Q via the gate lines GL to select a single row of sensing elements. The temperature detection and switch array control circuit 126 is electrically connected to the plurality of transistor switches Q via the sensing data lines DL. The temperature detection and switch array control circuit 126 can control the heating element 143 and select a single or multiple heating elements 143 to generate heat. When the user's finger presses on the substrate 110, the peaks and troughs of the fingerprint will be located on different heat-sensing elements 144 and generate different voltages or currents in the heat-sensing elements 144. More specifically, the heat-sensitive element 144 at the location of the crest of the fingerprint will have a larger induced voltage or current, and the heat-sensitive element 144 at the location of the trough of the fingerprint will have a smaller induced voltage or current. The fingerprint image on the fingerprint sensing module 10 can be obtained by the fingerprint detection circuit 12 respectively selecting the sensing elements (ie, the thermal elements 144) arranged in an array for voltage or current value detection. In the above description, the heat-sensitive element (heat-sensitive element) 144 can be a thermal diode or a thermistor.

Referring to FIG. 6C and FIG. 6D , which are respectively a side view and a top view of another embodiment of the fingerprint sensing module 10 using temperature sensing. Figures 6C and 6D are similar to the embodiments of Figures 6A and 6B. However, in Figures 6C and 6D, the heating element 143 and the heat-sensitive element 144 of Figures 6A and 6B are integrated into a heating/heat-sensing element 143A, and located in the sensing element layer 140 . Similarly, the fingerprint detection circuit 12 includes a switch control signal generating circuit 120 and a temperature detection and switch array control circuit 126. The switch control signal generating circuit 120 is electrically connected to a plurality of transistor switches Q via the gate lines GL to select a single row of sensing elements. The temperature detection and switch array control circuit 126 is electrically connected to the plurality of transistor switches Q via the sensing data lines DL. The temperature detection and switch array control circuit 126 can control the heating/heat-sensing element 143A and select single or multiple heating/heat-sensing elements 143A to generate heat. When the user's finger presses on the substrate 110, the peaks and troughs of the fingerprint will be located on different heating/heat-sensing elements 143A and generate different voltages or currents in the heating/heat-sensing elements 143A. More specifically, the heating/heat-sensitive element 143A at the location of the crest of the fingerprint will have a larger induced voltage or current, while the heating/heat-sensing element 143A at the location of the trough of the fingerprint will have a smaller induced voltage or current. is the induced current. The fingerprint image on the fingerprint sensing module 10 can be obtained by the fingerprint detection circuit 12 respectively selecting the sensing elements arranged in an array (that is, the heating/heat-sensing element 143A) for voltage or current value detection. In the embodiment shown in FIGS. 6A-6D , after the fingerprint detection circuit 12 detects the fingerprint image on the fingerprint sensing module 10 , the fingerprint image can be transmitted to the MCU 40 so that the MCU 40 can detect the fingerprint image based on the fingerprint image. And determine the fingerprint data (for example, it can be: a fingerprint feature data, a fingerprint feature comparison result data, or a fingerprint image data).

Referring to FIG. 7A and FIG. 7B , which are respectively a side view and a top view of the light sensing implementation of the fingerprint sensing module 10 . The temperature-sensitive fingerprint sensing module 10 includes a protective hard film layer 180, a sensing element layer 140, a transistor switch and wiring layer 112 and a substrate 110 from top to bottom. Referring to FIG. 7B , the sensing element layer 140 includes light-emitting elements 145 and photosensitive elements 146 arranged in an array, and each light-emitting element 145 is arranged for a photosensitive element 146 . The transistor switch and wiring layer 112 includes a plurality of transistor switches Q, a plurality of gate lines GL and a plurality of sensing data lines DL. Each transistor switch Q has a one-to-one correspondence with each sensing element (ie, the photosensitive element 146 ). The sensing data lines DL and the gate lines GL are arranged vertically and horizontally on the substrate 110 respectively. Each gate line GL is electrically connected to a plurality of transistor switches Q, and each data line DL is electrically connected to a plurality of transistor switches Q. Transistor switch Q.

The fingerprint detection circuit 12 includes a switch control signal generating circuit 120 and a light detection and switch array control circuit 128. The switch control signal generating circuit 120 is electrically connected to a plurality of transistor switches Q via the gate lines GL to select a single row of sensing elements. The light detection and switch array control circuit 128 is electrically connected to a plurality of transistor switches Q via the sensing data lines DL. The light detection and switch array control circuit 128 can control the light-emitting element 145 and select a single or multiple light-emitting elements 145 to emit light. When the user's finger presses on the substrate 110, the peaks and troughs of the fingerprint will be located on different photosensitive elements 146 and generate different voltages or currents in the photosensitive elements 146. More specifically, the photosensitive element 146 where the crest of the fingerprint is located will have a larger induced voltage or current (because the crest of the fingerprint generates greater reflected light), and the photosensitive element 146 where the trough of the fingerprint is located 146 will have a smaller induced voltage or induced current (because the troughs of the fingerprint will produce smaller reflected light). By the fingerprint detection circuit 12 selecting the sensing elements arranged in an array (ie, the photosensitive elements 146) for voltage or current value detection, the detected fingerprint image can be obtained. In the fingerprint sensing module 10 in the light sensing embodiment shown in FIG. 7A and FIG. 7B , the light-emitting elements 145 are respectively provided for the pixel units that sense the fingerprint image. For example, they can be organic light-emitting diodes (OLED), light-emitting diodes, etc. It is implemented by a diode (LED) or a micro light emitting diode (micro LED); and in the above embodiment, the photosensitive element 146 is a photosensitive element, such as a photosensitive diode or a photosensitive transistor.

Referring to FIG. 7C and FIG. 7D , which are respectively a side view and a top view of another embodiment of the fingerprint sensing module 10 using light sensing. 7C and 7D are similar to the embodiments of FIGS. 7A and 7B . However, in FIGS. 7C and 7D , the light-emitting elements 145 respectively provided in FIGS. 7A and 7B are formed into a single-surface light-emitting element layer 145A. Instead, the light emitting element layer 145A is located under the substrate 110 . The light-emitting element layer 145A can be a backlight plate or a cold light sheet and can emit light for all photosensitive elements 146 . The photosensitive element 146 is a photosensitive element, such as a photosensitive diode or a photosensitive transistor. Similarly, the fingerprint detection circuit 12 includes a switch control signal generating circuit 120 and a light detection and switch array control circuit 128. The switch control signal generating circuit 120 is electrically connected to a plurality of transistor switches Q via the gate lines GL to select a single row of sensing elements. The light detection and switch array control circuit 128 is electrically connected to a plurality of transistor switches Q via the sensing data lines DL. The light detection and switch array control circuit 128 can control the light emitting element layer 145A to emit light. When the user's finger presses on the substrate 110, the peaks and troughs of the fingerprint will be located on different photosensitive elements 146 and generate different voltages or currents in the photosensitive elements 146. More specifically, the photosensitive element 146 at the location of the crest of the fingerprint will have a larger induced voltage or current, while the photosensitive element 146 at the location of the trough of the fingerprint will have a smaller induced voltage or current. The fingerprint image on the fingerprint sensing module 10 can be obtained by the fingerprint detection circuit 12 respectively selecting the sensing elements (ie, the photosensitive elements 146) arranged in an array for voltage or current value detection. Similarly, in the embodiments shown in FIGS. 7A-7D , after the fingerprint detection circuit 12 detects the fingerprint image on the fingerprint sensing module 10 , the fingerprint image can be transmitted to the MCU 40 so that the MCU 40 can This fingerprint image is used to determine fingerprint data (for example, it can be: a fingerprint feature data, a fingerprint feature comparison result data, or a fingerprint image data).

In the aforementioned embodiments, the substrate 110 of the fingerprint sensing module 10 is a rigid substrate such as a glass substrate, or a flexible substrate such as a PI substrate.

8 is a flow chart of a wireless fingerprint detection method according to an embodiment of the present invention. This wireless fingerprint detection method can be applied to the wireless fingerprint detection system 60 shown in FIGS. 1A-7D. In step S100, an electronic device 80 with wireless communication function is inserted into the wireless fingerprint detection system 60 with the built-in fingerprint sensing module 10 (for example, the wireless fingerprint detection system 60 is implemented in the form of an electronic device protective case). Or it is configured by the user to be close to the wireless fingerprint detection system 60 with the built-in fingerprint sensing module 10 . In step S102, the electronic device 80 performs first power charging on the wireless fingerprint detection system 60. For example, the power coil 82 of the electronic device 80 is used to transmit wireless power to the wireless communication circuit 30 in the wireless fingerprint detection system 60, and the The wireless fingerprint detection system 60 enters a power-saving standby mode. According to an embodiment of the present invention, in this power-saving standby mode, only the wireless communication circuit 30 and the proximity sensor 38 in the wireless fingerprint detection system 60 are in operation. In other words, the wireless communication circuit 30 receives the first power standby power from the electronic device 80 via its second induction coil 32 and provides this power to the wireless communication circuit 30 and the proximity sensor 38 for operation. In this power-saving standby mode, the proximity sensor 38 continuously detects whether the user's finger touches or is close to the wireless fingerprint detection system 60; and the wireless communication circuit 30 can perform near field communication (such as NFC) with the electronic device 80. In addition, in this power-saving standby mode, other components of the wireless fingerprint detection system 60, such as at least one of the fingerprint sensing module 10, the fingerprint detection circuit 12, the wireless charging circuit 20, the MCU 40, and the security chip 50 (or are all) systems are out of service.

Referring to FIG. 8 , in step S110 , if the proximity sensor 38 senses that the user's finger contacts or approaches the wireless fingerprint detection system 60 , the proximity sensor 38 will trigger the MCU 40 to start and enable the wireless fingerprint detection system 60 Enter the working mode (step S112). In this working mode, in addition to the MCU 40 being activated, the fingerprint sensing module 10, the fingerprint detection circuit 12, the wireless charging circuit 20 and the security chip 50 will also be activated. Because the proximity sensor 38 senses that the user's finger touches or is close to the wireless fingerprint detection system 60, the fingerprint sensor module 10 can sense a large-sized user fingerprint image, and the fingerprint detection circuit 12 detects this User fingerprint image. In this working mode, the wireless communication circuit 30 will transmit the information of the user's finger contact or proximity to the electronic device 80, so that the electronic device 80 can increase the transmission power. Since the wireless charging circuit 20 is activated, the electronic device 80 performs second power charging on the wireless fingerprint detection system 60 , that is, the power coil 82 of the electronic device 80 transmits wireless power to the first induction coil 22 in the wireless charging circuit 20 . Since the size of the first induction coil 22 is larger than that of the second induction coil 32 and the second power is larger than the first power, the second power is sufficient to supply the operation of the wireless fingerprint detection system 60 in the working mode, that is, the power can supply fingerprint sensing. The operating power of the module 10, the fingerprint detection circuit 12, the wireless charging circuit 20, the MCU 40, and the security chip 50. Furthermore, excess power can also be stored through an energy storage component 28 (such as a thin lithium battery or a supercapacitor).

After step S112, because the fingerprint detection circuit 12 has detected the fingerprint image on the fingerprint sensing module 10, the fingerprint image can be processed by the MCU 40 into fingerprint data (for example, it can be: a fingerprint feature data, a fingerprint feature comparison Result data or a fingerprint image data). According to an embodiment of the present invention, this fingerprint data can be transmitted to the security chip 50 via the MCU 40 to store the user information (that is, the user information) stored in the security core 52 and the memory unit 54. The electronic device 80 has access rights to the user's fingerprint data) to perform the user identity authentication process (step S114), and the authentication result is sent to the electronic device 80. After the authentication result is transmitted, in order to save the power of the wireless fingerprint detection system 60, the wireless fingerprint detection system 60 can return to the power-saving standby mode by itself or controlled by the electronic device 80. In step S114, according to another embodiment of the present invention, the fingerprint data can be transmitted to the wireless communication circuit 30 via the MCU 40, and then transmitted to the electronic device 80 by the wireless communication circuit 30. The electronic device 80 then performs identity authentication on the user based on the fingerprint data. Similarly, after the fingerprint data is transmitted to the electronic device 80, in order to save the power of the wireless fingerprint detection system 60, the wireless fingerprint detection system 60 can return to the power-saving standby mode.

Step 120 is to determine whether the user identity authentication is successful, that is, the determination is made by the wireless fingerprint detection system 60 or the electronic device 80 . If the authentication is successful in step S120, in step S122, the electronic device 80 can perform sensitive operations related to user identity authentication, such as unlocking or powering on the electronic device 80; or starting a specific default program. The above-mentioned specific default programs may be, for example, encrypting or decrypting files, editing files, transmitting files, access control management, electronic payment or transfer programs. According to an embodiment of the present invention, after the user identity authentication is successful, the electronic device 80 can execute a default program to perform an encryption operation after unlocking, that is, transmit a file to the MCU 40 through the wireless communication circuit 30, and the MCU 40 then transmits it. This file is sent to the security chip 50 for encryption processing. The wireless fingerprint detection system 60 can transmit the encrypted file back to the electronic device 80 or to a third-party device. According to an embodiment of the present invention, after the user identity authentication is successful, the electronic device 80 can execute a default program to perform the decryption operation after unlocking, that is, transmit an encrypted file to the MCU 40 through the wireless communication circuit 30, and the MCU 40 then The encrypted file is sent to the security chip 50 for decryption processing. The wireless fingerprint detection system 60 can send the decrypted file back to the electronic device 80 .

If the authentication fails in step S120, proceed to step S130. The electronic device 80 or the wireless fingerprint detection system 60 accumulates the number of authentication failures, and returns the process to step S130 before the accumulated number of authentication failures is less than a predetermined number (N times). S110, the proximity sensor 38 continuously detects whether the user's finger contacts or is close to the wireless fingerprint detection system 60.

In step S130, if the electronic device 80 or the wireless fingerprint detection system 60 determines that the cumulative number of authentication failures is greater than or equal to the predetermined number, it means that an unauthenticated user attempts to use the electronic device 80, and the electronic device 80 will Execute a locking procedure, or lock the electronic device 80 to authenticate the user's electronic account, or perform a remote warning or alarm procedure through wireless communication.

9 is a flow chart of a wireless fingerprint detection method according to another embodiment of the present invention. This wireless fingerprint detection method can be applied to the wireless fingerprint detection system 60 shown in FIGS. 1A-7D. In step S200, an electronic device 80 with wireless communication function is inserted into the wireless fingerprint detection system 60 with the built-in fingerprint sensing module 10 (for example, the wireless fingerprint detection system 60 is implemented in the form of an electronic device protective case). Or it is configured by the user to be close to the wireless fingerprint detection system 60 with the built-in fingerprint sensing module 10 .

In step S202, the electronic device 80 performs first power charging on the wireless fingerprint detection system 60, for example, using the power coil 82 of the electronic device 80 to transmit wireless power to the wireless communication circuit 30 in the wireless fingerprint detection system 60, and using The wireless fingerprint detection system 60 enters a power-saving standby mode. According to an embodiment of the present invention, in this power-saving standby mode, only the wireless communication circuit 30 and the proximity sensor 38 in the wireless fingerprint detection system 60 are in operation. In other words, the wireless communication circuit 30 receives standby power from the electronic device 80 via its second induction coil 32 and provides the power to the wireless communication circuit 30 and the proximity sensor 38 for operation. In addition, in this power-saving standby mode, other components of the wireless fingerprint detection system 60, such as at least one of the fingerprint sensing module 10, the fingerprint detection circuit 12, the wireless charging circuit 20, the MCU 40, and the security chip 50 (or are all) systems are out of service.

In step S210, the wireless communication circuit 30 of the wireless fingerprint detection system 60 determines whether a startup command is received from the electronic device 80. If the startup command is not received, the wireless fingerprint detection system 60 still maintains power-saving standby. mode to save power. If in step S210, the wireless communication circuit 30 of the wireless fingerprint detection system 60 receives the startup command from the electronic device 80, then in step S212, the wireless communication circuit 30 triggers the MCU 40 to start and causes the wireless fingerprint detection system 60 to start. Enter working mode. In this working mode, in addition to the MCU 40 being activated, the fingerprint sensing module 10, the fingerprint detection circuit 12, the wireless charging circuit 20 and the security chip 50 will also be activated. In the working mode, since the wireless charging circuit 20 is activated, the electronic device 80 performs second power charging on the wireless fingerprint detection system 60 , that is, the power coil 82 of the electronic device 80 transmits wireless power to the third node in the wireless charging circuit 20 . An induction coil 22. Since the size of the first induction coil 22 is larger than that of the second induction coil 32 and the second power is larger than the first power, the second power is sufficient to supply the operation of the wireless fingerprint detection system 60 in the working mode, that is, the power can supply fingerprint sensing. The operating power of the module 10, the fingerprint detection circuit 12, the wireless charging circuit 20, the MCU 40, and the security chip 50. Furthermore, excess power can also be stored through an energy storage component 28 (such as a thin lithium battery or a supercapacitor).

Subsequently in step S220, the proximity sensor 38 continues to detect whether the user's finger contacts or is close to the wireless fingerprint detection system 60. If the proximity sensor 38 does not detect that the user's finger is in contact with or is close to the wireless fingerprint detection system 60, it will continue to detect. If the proximity sensor 38 detects that the user's finger contacts or is close to the wireless fingerprint detection system 60, then proceed to the subsequent step S222. The fingerprint sensor module 10 will sense a large-size user fingerprint image, and the fingerprint detection circuit will 12 detects the fingerprint image on the fingerprint sensor module 10 . This fingerprint image can be processed into fingerprint data by the MCU 40 (for example, it can be: a fingerprint feature data, a fingerprint feature comparison result data, or a fingerprint image data). This fingerprint data can be sent to the MCU 40 and sent from the MCU 40 to the security chip 50 for comparison with the user information stored in the memory unit 54 (that is, the fingerprint data of the user who has access rights to the electronic device 80). To perform the authentication process and transmit the authentication result to the electronic device 80 . Then in step S224, after receiving the authentication result, the electronic device 80 commands the wireless fingerprint detection system 60 to enter the power-saving standby mode, or the wireless fingerprint detection system 60 enters the power-saving standby mode by itself. In this power-saving standby mode, other components of the wireless fingerprint detection system 60 (except for the wireless communication circuit 30 and the proximity sensor 38 ), such as the fingerprint sensing module 10 , the fingerprint detection circuit 12 , the wireless charging circuit 20 , and the MCU At least one (or all) of the 40 and the security chip 50 is in a shutdown state to save power.

Then in step S230, the electronic device 80 performs subsequent processing based on the authentication result sent from the wireless fingerprint detection system 60. If the authentication result is that the identity authentication is successful, in step S232, the electronic device 80 can perform sensitive operations related to user identity authentication, such as unlocking the electronic device 80; or starting a specific default program. The above-mentioned specific default programs may be, for example, encrypting or decrypting files, editing files, transmitting files, access control management, electronic payment or transfer programs. According to an embodiment of the present invention, after the user identity authentication is successful, the electronic device 80 can execute a default program to perform an encryption operation after unlocking, that is, transmit a file to the MCU 40 through the wireless communication circuit 30, and the MCU 40 then transmits it. This file is sent to the security chip 50 for encryption processing. The wireless fingerprint detection system 60 can transmit the encrypted file back to the electronic device 80 or to a third-party device. According to an embodiment of the present invention, after the user identity authentication is successful, the electronic device 80 can execute a default program to perform the decryption operation after unlocking, that is, transmit an encrypted file to the MCU 40 through the wireless communication circuit 30, and the MCU 40 then The encrypted file is sent to the security chip 50 for decryption processing. The wireless fingerprint detection system 60 can send the decrypted file back to the electronic device 80 . If the identity authentication fails, the electronic device 80 executes step S240, that is, the electronic device 80 accumulates the number of failed authentications, and proceeds to step S244, that is, before the accumulated number of failed authentications is less than a predetermined number (N times). The device 80 instructs the wireless fingerprint detection system 60 to return to the working mode from the power-saving standby mode so that the fingerprint image can be continued to be detected later. In step S240, if the electronic device 80 or the wireless fingerprint detection system 60 determines that the cumulative number of authentication failures is greater than or equal to the predetermined number, it means that an unauthenticated user attempts to use the electronic device 80, and the electronic device 80 will Execute the locking procedure, or the remote warning or alarm procedure through wireless communication.

Referring to FIG. 10 , a flow chart of a wireless fingerprint detection method according to another embodiment of the present invention is shown. This wireless fingerprint detection method can be applied to the wireless fingerprint detection system 60 shown in FIGS. 1A-7D . In step S300, an electronic device 80 with wireless communication function is inserted into the wireless fingerprint detection system 60 with the built-in fingerprint sensing module 10 (for example, the wireless fingerprint detection system 60 is implemented in the form of an electronic device protective case). Or it is configured by the user to be close to the wireless fingerprint detection system 60 with the built-in fingerprint sensing module 10 .

In step S302, the electronic device 80 performs first power charging on the wireless fingerprint detection system 60. For example, the power coil 82 of the electronic device 80 is used to transmit wireless power to the wireless communication circuit 30 in the wireless fingerprint detection system 60, and the The wireless fingerprint detection system 60 enters a power-saving standby mode. According to an embodiment of the present invention, in this power-saving standby mode, only the wireless communication circuit 30 and the proximity sensor 38 in the wireless fingerprint detection system 60 are in operation. In other words, the wireless communication circuit 30 receives standby power from the electronic device 80 via its second induction coil 32 and provides the power to the wireless communication circuit 30 and the proximity sensor 38 for operation. In addition, in this power-saving standby mode, other components of the wireless fingerprint detection system 60, such as at least one of the fingerprint sensing module 10, the fingerprint detection circuit 12, the wireless charging circuit 20, the MCU 40, and the security chip 50 (or are all) systems are out of service.

In step S310, the wireless communication circuit 30 of the wireless fingerprint detection system 60 determines whether a startup command is received from the electronic device 80. If the startup command is not received, the wireless fingerprint detection system 60 still maintains power-saving standby. mode to save power. If in step S310, the wireless communication circuit 30 of the wireless fingerprint detection system 60 receives the startup command from the electronic device 80, then in step S312, the wireless communication circuit 30 triggers the MCU 40 to start and causes the wireless fingerprint detection system 60 to start. Enter working mode. In this working mode, in addition to the MCU 40 being activated, the fingerprint sensing module 10, the fingerprint detection circuit 12, the wireless charging circuit 20 and the security chip 50 will also be activated. In this working mode, since the wireless charging circuit 20 is activated, the electronic device 80 performs second power charging on the wireless fingerprint detection system 60 , that is, the power coil 82 of the electronic device 80 transmits wireless power to the wireless charging circuit 20 . The first induction coil 22. Since the size of the first induction coil 22 is larger than that of the second induction coil 32 and the second power is larger than the first power, the second power is sufficient to supply the operation of the wireless fingerprint detection system 60 in the working mode, that is, the power can supply fingerprint sensing. The operating power of the module 10, the fingerprint detection circuit 12, the wireless charging circuit 20, the MCU 40, and the security chip 50. Furthermore, excess power can also be stored through the energy storage component 28 (such as a thin lithium battery or a supercapacitor).

Subsequently in step S320, the proximity sensor 38 continues to detect whether the user's finger contacts or is close to the wireless fingerprint detection system 60. If the proximity sensor 38 does not detect that the user's finger is in contact with or is close to the wireless fingerprint detection system 60, it will continue to detect. If the proximity sensor 38 detects that the user's finger contacts or is close to the wireless fingerprint detection system 60, the subsequent step S322 is performed. In step S322, the fingerprint sensing module 10 senses a large-area image of the user's fingerprint, and the fingerprint detection circuit 12 detects the large-size image of the user's fingerprint. This fingerprint image can be processed into fingerprint data by the MCU 40 (for example, it can be: a fingerprint feature data, a fingerprint feature comparison result data, or a fingerprint image data). The fingerprint data can be transmitted to the wireless communication circuit 30 via the MCU 40, and then transmitted to the electronic device 80 by the wireless communication circuit 30. In step S324, the electronic device 80 authenticates the user based on the fingerprint data, and causes the wireless fingerprint detection system 60 to enter a power-saving standby mode.

In step S330, if the electronic device 80 determines that the identity authentication is successful, step S332 is performed. The electronic device 80 can perform sensitive operations related to user identity authentication, such as unlocking the electronic device 80; or starting a specific default program. . The above-mentioned specific default programs may be, for example, encrypting or decrypting files, editing files, transmitting files, access control management, electronic payment or transfer programs. According to an embodiment of the present invention, after the user identity authentication is successful, the electronic device 80 can execute a default program to perform an encryption operation after unlocking, that is, transmit a file to the MCU 40 through the wireless communication circuit 30, and the MCU 40 then transmits it. This file is sent to the security chip 50 for encryption processing. The wireless fingerprint detection system 60 can transmit the encrypted file back to the electronic device 80 or to a third-party device. According to an embodiment of the present invention, after the user identity authentication is successful, the electronic device 80 can execute a default program to perform the decryption operation after unlocking, that is, transmit an encrypted file to the MCU 40 through the wireless communication circuit 30, and the MCU 40 then The encrypted file is sent to the security chip 50 for decryption processing. The wireless fingerprint detection system 60 can send the decrypted file back to the electronic device 80 .

In step S330, if the electronic device 80 determines that the identity authentication fails, step S340 is performed, that is, the electronic device 80 accumulates the number of failed authentications, and proceeds to step S344 before the accumulated number of failed authentications is less than a predetermined number (N times). , that is, the electronic device 80 instructs the wireless fingerprint detection system 60 to return to the working mode from the power-saving standby mode, so that it can continue to detect fingerprint images in the future. In step S340, if the electronic device 80 determines that the cumulative number of authentication failures is greater than or equal to the predetermined number, it means that an unauthenticated user attempts to use the electronic device 80, and the electronic device 80 will execute a locking procedure or be locked. The electronic device 80 authenticates the user's electronic account, or performs a remote warning or alarm procedure via wireless communication (step S342).

In the above embodiments, if the power consumption of the fingerprint sensing module 10 is not large, the wireless fingerprint detection system 60 can also wirelessly receive operating power from the electronic device 80 through the second induction coil 32 and enable wireless fingerprint detection. The measurement system 60 operates in the working mode. Similarly, in this situation, the second induction coil 32 wirelessly receives operating power from the electronic device 80 to supply power for other components of the wireless fingerprint detection system 60 .

To sum up, the wireless fingerprint detection system and method of the present invention have the following advantages:

1. Since the wireless fingerprint detection system can provide large-area fingerprint recognition and communicate with electronic devices wirelessly, it can improve the accuracy of user identity authentication and avoid the frequent plugging and unplugging problems of conventional fingerprint detection systems.

2. The wireless fingerprint detection system can switch between power-saving standby mode and working mode, which can avoid consuming power of electronic devices.

3. The fingerprint sensor module and other components (such as wireless communication circuits, fingerprint detection circuits) can be packaged separately, so that the fingerprint sensor module can have a larger sensing area without affecting the packaging of other circuits.

However, the above are only preferred embodiments of the present invention and cannot limit the scope of the present invention. That is, all equivalent changes and modifications made based on the patent scope of the present invention should still be covered by the patent of the present invention. Scope is the category intended to be protected. The present invention can also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention. However, these corresponding changes and modifications are It should fall within the protection scope of the appended claims of the present invention. In summary, it should be understood that the present invention has industrial applicability, novelty and progressiveness, and the structure of the present invention has never been seen in similar products and has been publicly used. It fully meets the requirements for an invention patent application and the application can be filed in accordance with the patent law.

10:Fingerprint sensor module 110:Substrate 112: Transistor switch and wiring layer 140: Sensing element layer 142: Sensing electrode 143: Heating element 143A: Heating/Heating element 144: Heating element 145:Light-emitting components 146: Photosensitive element 145A: Light emitting element layer 150: Piezoelectric element 152: Piezoelectric electrode 154: Piezoelectric material layer 156: Piezoelectric induction electrode 180: Protect the hard coat layer 182: Passivation layer 12: Fingerprint detection circuit 120: Switch control signal generation circuit 122: Capacitance detection and switch array control circuit 123: Capacitance detection circuit 124: Ultrasonic detection circuit 125: Ultrasonic oscillation circuit 126: Temperature detection and switch array control circuit 128:Light detection and switch array control circuit 20:Wireless charging receiving circuit 22: First induction coil 24: Rectifier circuit 26:Capacitor 28:Energy storage components 30: Wireless communication circuit 32: Second induction coil 38:Proximity sensor 40:Microcontroller 50:Security chip 60:Wireless fingerprint detection system 61: Shell 62: Plane body 64: Side wall 80: Electronic devices Q: Transistor switch GL: gate line DL: Sensing data line S100~S132: steps S200~S244: steps S300~S344: steps

1A is a schematic diagram of a wireless fingerprint detection system for electronic devices according to the present invention.

FIG. 1B is a partial circuit diagram of the wireless fingerprint detection system of the present invention.

FIG. 2 illustrates another schematic diagram of the wireless fingerprint detection system for electronic devices of the present invention.

FIG. 3 illustrates another schematic diagram of the wireless fingerprint detection system for electronic devices according to the present invention.

FIG. 4A is a side view of the capacitive fingerprint sensing module of the wireless fingerprint detection system of the present invention.

4B is a top view of the capacitive fingerprint sensing module of the wireless fingerprint detection system of the present invention.

FIG. 5A is a side view of the ultrasonic fingerprint sensing module of the wireless fingerprint detection system of the present invention.

FIG. 5B is a top view of the ultrasonic fingerprint sensing module of the wireless fingerprint detection system of the present invention.

FIG. 6A is a side view of the thermal fingerprint sensing module of the wireless fingerprint detection system of the present invention.

6B is a top view of the thermal fingerprint sensing module of the wireless fingerprint detection system of the present invention.

6C is a side view of another thermal-sensitive fingerprint sensing module of the wireless fingerprint detection system of the present invention.

FIG. 6D is a top view of another thermal fingerprint sensor module of the wireless fingerprint detection system of the present invention.

7A is a side view of the optical fingerprint sensing module of the wireless fingerprint detection system of the present invention.

FIG. 7B is a top view of the optical fingerprint sensing module of the wireless fingerprint detection system of the present invention.

7C is a side view of another optical fingerprint sensing module of the wireless fingerprint detection system of the present invention.

FIG. 7D is a top view of another optical fingerprint sensing module of the wireless fingerprint detection system of the present invention.

Figure 8 is a flow chart of the wireless fingerprint detection method of the present invention.

Figure 9 is another flow chart of the wireless fingerprint detection method of the present invention.

Figure 10 is another flow chart of the wireless fingerprint detection method of the present invention.

60:Wireless fingerprint detection system

61: Shell

62: Plane body

64: Side wall

10:Fingerprint sensor module

20:Wireless charging receiving circuit

30: Wireless communication circuit

80: Electronic devices

Claims (21)

A wireless fingerprint detection system is used for an electronic device with wireless communication function. The wireless fingerprint detection system includes: a shell containing a planar body; A fingerprint sensing module is provided on the housing and includes: a substrate; A plurality of sensing elements are arranged on the substrate. The plurality of sensing elements are arranged vertically and horizontally to form a matrix of sensing elements. The effective detection area of the matrix of sensing elements is not less than 1 square centimeter; A plurality of transistor switches are disposed on the substrate, and each transistor switch corresponds one-to-one to one of the sensing elements; A plurality of sensing data lines and a plurality of gate lines are respectively arranged vertically and horizontally on the substrate. Each gate line is electrically connected to the plurality of transistor switches. Each data line is electrically connected to a plurality of transistor switches. transistor switches; and a fingerprint detection circuit electrically connected to the plurality of sensing elements; A wireless charging receiving circuit is electrically connected to the fingerprint sensing module and the fingerprint detection circuit, the wireless charging receiving circuit includes at least a first induction coil; and A wireless communication circuit is electrically connected to the wireless charging receiving circuit and can perform near field communication with the electronic device. The wireless fingerprint detection system of claim 1, wherein the electronic device is a smart mobile communication device. The wireless fingerprint detection system of claim 1, wherein the substrate is a rigid substrate or a flexible substrate. The wireless fingerprint detection system as claimed in claim 1 further includes an energy storage element. The wireless fingerprint detection system of claim 4, wherein the energy storage element is a thin lithium battery or a supercapacitor. The wireless fingerprint detection system of claim 1, wherein the electronic device includes a power coil, and the first induction coil is disposed in a position closely adjacent to the power coil of the electronic device. The wireless fingerprint detection system as claimed in claim 1, wherein the fingerprint sensing module is attached to a surface of the planar body of the housing. The wireless fingerprint detection system as claimed in claim 1, wherein the fingerprint sensing module is attached to a side of the planar main body of the housing facing away from the electronic device. The wireless fingerprint detection system of claim 1, wherein part of the wireless charging receiving circuit and the wireless communication circuit are integrated into an integrated circuit. The wireless fingerprint detection system of claim 1, wherein part of the wireless charging receiving circuit, the wireless communication circuit and the fingerprint detection circuit are integrated into an integrated circuit. The wireless fingerprint detection system of claim 1, wherein the wireless communication circuit further includes a second induction coil. The wireless fingerprint detection system as described in claim 1 further includes a microcontroller (MCU) circuit, which is electrically connected to the fingerprint detection circuit and the wireless communication circuit to communicate with the wireless communication circuit through the wireless communication circuit. The electronic device communicates. The wireless fingerprint detection system of claim 1, wherein the electronic device is a smart phone or a tablet computer. The wireless fingerprint detection system as claimed in claim 1, wherein the fingerprint detection circuit detects the self-capacitance or mutual capacitance of the plurality of sensing elements to obtain the fingerprint image. The wireless fingerprint detection system of claim 1, wherein the sensing element is a piezoelectric sensing element, and the fingerprint detection circuit obtains the fingerprint image by detecting voltage changes of the plurality of piezoelectric sensing elements. The wireless fingerprint detection system of claim 15, wherein the fingerprint sensing module further includes at least one ultrasonic sound source element. The wireless fingerprint detection system of claim 1, wherein the sensing element is a heat-sensitive element, and the fingerprint detection circuit obtains the fingerprint image by detecting voltage or current changes of the multiple heat-sensitive elements. The wireless fingerprint detection system of claim 17, wherein the fingerprint sensing module further includes a plurality of heating elements. The wireless fingerprint detection system as claimed in claim 1, wherein the sensing element is a photosensitive element; and the fingerprint detection circuit obtains the fingerprint image by detecting voltage or current changes of the plurality of photosensitive elements. The wireless fingerprint detection system of claim 19, wherein the fingerprint sensor further includes one or more light-emitting elements. The wireless fingerprint detection system as claimed in claim 1 further includes a security chip, and the security chip is electrically connected to the microcontroller to perform data encryption or decryption.

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