Biometric detection devices and electronic devices

Abstract

The embodiment of the present application provides a biometric detection device and an electronic device, the biometric detection device comprising: an ultrasonic detection module and a touch component; the ultrasonic detection module is used to detect a biometric signal through the touch component and send the biometric signal to a processing unit, so that the processing unit performs fingerprint detection and / or heart rate detection according to the biometric signal; the distance between the ultrasonic transceiver plane in the ultrasonic detection module and the finger contact surface on the touch component is less than or equal to 2mm. This solution can improve the design freedom of electronic devices with fingerprint detection and heart rate detection requirements.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic technology, and in particular to a biometric detection device and an electronic device. Background Art

[0002] As fingerprints are immutable, unique and convenient, fingerprint detection is widely used as a biometric identification method for electronic device unlocking, electronic payment and password management. During fingerprint detection, the fingerprint sensor collects the fingerprint image, matches the collected fingerprint image with the pre-stored fingerprint template, and obtains a matching result. When the match is successful, the user identity verification is passed, and the device unlocking, payment or password auto-filling is completed.

[0003] At present, commonly used electronic devices use optical, capacitive or inductive fingerprint sensors to collect fingerprint images, and then perform fingerprint detection based on the collected fingerprint images.

[0004] However, some electronic devices have the needs of fingerprint detection and heart rate detection. Optical, capacitive or inductive fingerprint sensors can only perform fingerprint detection, but not heart rate detection. In order to perform heart rate detection, a heart rate sensor needs to be installed in the electronic device. The fingerprint sensor and the heart rate sensor will occupy a larger space inside the electronic device, resulting in a lower degree of design freedom of the electronic device. Summary of the invention

[0005] In view of this, the embodiments of the present application provide a biometric detection device and an electronic device, which can improve the security of the electronic device.

[0006] According to a first aspect of an embodiment of the present application, a biometric detection device is provided, comprising: an ultrasonic detection module and a touch component; the ultrasonic detection module is used to detect a biometric signal through the touch component and send the biometric signal to a processing unit, so that the processing unit performs fingerprint detection and / or heart rate detection based on the biometric signal; the distance between the ultrasonic transceiver plane in the ultrasonic detection module and the finger contact surface on the touch component is less than or equal to 2 mm.

[0007] In a possible implementation, the touch component is a key or a specific area of ​​a shell of the electronic device where the biometric detection device is located.

[0008] In a possible implementation, the biometric detection device further includes a light-emitting component; the light-emitting component is used to generate a light signal through the touch component, wherein the light signal is at least used to indicate a working status of the ultrasonic detection module.

[0009] In a possible implementation, the light-emitting component includes: a first circuit board and a plurality of LEDs; the plurality of LEDs are electrically connected to the first circuit board, and the first circuit board is used to power the plurality of LEDs; and the side of the first circuit board on which the LEDs are mounted is opposite to the touch component.

[0010] In one possible implementation, the touch component includes: a button cap; a receiving cavity is provided on the inner side of the button cap, the side of the first circuit board on which the LED is mounted is bonded to the edge of the receiving cavity by a light board bonding adhesive, and the multiple LEDs are located in the receiving cavity.

[0011] In a possible implementation, the button cap includes: a light-shielding cover and a supporting body; a first light-shielding layer is provided on the inner side surface of the light-shielding cover, a first light-transmitting hole is opened on the first light-shielding layer, and a first light-transmitting identification pattern is printed in the first light-transmitting hole; the supporting body is made of a light-guiding material, the outer side surface of the supporting body is in contact with the inner side surface of the light-shielding cover, the first light-shielding layer and the first identification pattern are sandwiched between the supporting body and the light-shielding cover, and the inner side surface of the supporting body is provided with the accommodating cavity; the supporting body is used to transmit the light emitted by the LED to the first light-transmitting hole, so that at least part of the light emitted by the LED can pass through the area on the light-shielding cover where the first identification pattern is located, so that the first identification pattern can be seen.

[0012] In a possible implementation, the ultrasonic detection module includes an ultrasonic sensor, the ultrasonic sensor is adhered to the bottom of the accommodating cavity by a sensor bonding adhesive, and the plurality of LEDs are distributed around the ultrasonic sensor.

[0013] In a possible implementation, the touch component includes a transparent cover plate, and the light-emitting component also includes a light guide plate; a second light-shielding layer is provided on at least part of the lower surface of the transparent cover plate, a second light-transmitting hole is provided on the second light-shielding layer, and a second light-transmitting identification pattern is printed in the second light-transmitting hole; a through hole is provided on the first circuit board, and the multiple LEDs are distributed around the edge of the through hole; the upper surface of the light guide plate is bonded to the lower surface of the transparent cover plate by light guide plate bonding glue, and the second light-shielding layer and the second identification pattern are sandwiched between the light guide plate and the transparent cover plate; the ultrasonic sensor included in the ultrasonic detection module is bonded to the lower surface of the light guide plate by sensor bonding glue, and along the axial direction of the through hole, the ultrasonic sensor is at least partially located in the through hole, and the light guide plate is at least partially located outside the through hole; the light guide plate is used to conduct the light emitted by the LED to the second light-transmitting hole, so that at least part of the light emitted by the LED passes through the area where the second identification pattern is located on the transparent cover plate, so that the second identification pattern appears.

[0014] In a possible implementation, the transparent cover includes a touch area and / or a display area in the electronic device where the biometric detection device is located; and / or the first circuit board includes a circuit board in the electronic device where the biometric detection device is located.

[0015] In a possible implementation, the sensor bonding adhesive includes a conductive foil and double-sided adhesive adhered to both sides of the conductive foil, and the double-sided adhesive on one side of the conductive foil is bonded to the ultrasonic sensor.

[0016] In a possible implementation, the conductive foil is used to send a proximity signal to the processing unit when a finger approaches an outer side surface of the touch component, so that the processing unit controls the ultrasonic detection module to switch to a working state after receiving the proximity signal.

[0017] In a possible implementation manner, the conductive foil includes copper foil.

[0018] In one possible implementation, the ultrasonic detection module includes: the ultrasonic sensor, a second circuit board and a connector; the ultrasonic sensor and the connector are electrically connected through the second circuit board, and the connector is used to be electrically connected to the processing unit; the ultrasonic sensor is used to detect the biometric signal and transmit the biometric signal to the connector through the second circuit board; the connector is used to transmit the received biometric signal and the heart rate signal to the processing unit.

[0019] In a possible implementation manner, the second circuit board includes a flexible circuit board.

[0020] In a second aspect, an embodiment of the present application provides an electronic device, comprising a biometric detection device provided by the above-mentioned first aspect or any possible implementation of the first aspect.

[0021] It can be seen from the above technical solution that the ultrasonic detection module can detect biometric signals through the touch component and send the detected biometric signals to the processing unit, and the processing unit can perform fingerprint detection and / or heart rate detection based on the biometric signals. Since the ultrasonic detection module can be used to collect fingerprint signals and heart rate signals, in electronic devices with fingerprint detection and heart rate detection requirements, fingerprint detection and heart rate detection can be achieved by equipping the ultrasonic detection module provided in the embodiment of the present application, without the need to separately equip the fingerprint sensor and the heart rate sensor, which reduces the occupation of the internal space of the electronic device, thereby increasing the degree of freedom in the design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1A is a schematic diagram of a biometric detection device according to an embodiment of the present application;

[0024] Figure 1B is a schematic diagram of a biometric detection device according to another embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a light emitting component according to an embodiment of the present application;

[0026] Figure 3 is a cross-sectional schematic diagram of a button cap according to an embodiment of the present application;

[0027] Figure 4A is a schematic diagram of the inner side structure of a key cap according to an embodiment of the present application;

[0028] Figure 4B is a schematic diagram of the outer side structure of a key cap according to an embodiment of the present application;

[0029] Figure 5 is a cross-sectional schematic diagram of a biometric detection device according to an embodiment of the present application;

[0030] Figure 6 is a cross-sectional schematic diagram of a biometric detection device according to another embodiment of the present application;

[0031] Figure 7 is a schematic diagram of a biometric detection device including a key cap according to an embodiment of the present application;

[0032] Figure 8 is a schematic diagram of a biometric detection device including a transparent cover plate according to an embodiment of the present application;

[0033] Fig. 9 is a schematic diagram of an electronic device according to an embodiment of the present application;

[0034] Fig.10 is a schematic diagram of an electronic device according to another embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0036] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0037] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0038] Biometric detection device

[0039] Figure 1A FIG. 1 is a schematic diagram of a biometric detection device according to an embodiment of the present application, which can be used for fingerprint and heart rate detection. Figure 1A As shown, the biometric detection device 100 includes an ultrasonic detection module 110 and a touch component 130. The ultrasonic detection module 110 can detect biometric signals through the touch component 130, and send the detected biometric signals to the processing unit, so that the processing unit performs fingerprint detection and / or heart rate detection according to the biometric signals. The distance between the ultrasonic transceiver plane in the ultrasonic detection module 110 and the finger contact surface on the touch component 130 is less than or equal to 2 mm.

[0040] According to actual business needs, the biometric signal may include any one or both of a fingerprint signal and a heart rate signal. Fingerprint detection may be performed based on the fingerprint signal, and heart rate detection may be performed based on the heart rate signal.

[0041] The ultrasonic detection module 110 can emit ultrasonic waves and receive ultrasonic signals emitted by external structures. When the user's finger is placed on the touch component 130, the ultrasonic wave emitted by the ultrasonic detection module 110 passes through the touch component 130 and reaches the finger. The finger reflects at least part of the ultrasonic wave that arrives, and the reflected ultrasonic wave passes through the touch component 130 and is received by the ultrasonic detection module 110. Since different fingerprints have different reflection effects on ultrasonic waves, the presence or absence of heart rate will also affect the reflection of ultrasonic waves. Therefore, the ultrasonic detection module 110 can extract fingerprint signals and heart rate signals from the reflected ultrasonic waves, and fingerprint detection can be performed based on the fingerprint signal, and heart rate detection can be performed based on the heart rate signal.

[0042] After acquiring the fingerprint signal and the heart rate signal, the ultrasonic detection module 110 can send the fingerprint signal and the heart rate signal to the processing unit, and the processing unit performs fingerprint detection based on the fingerprint signal and performs heart rate detection based on the heart rate signal. The processing unit can be any processing unit outside the biometric detection device 100, for example, the processing unit can be a processing unit in the electronic device where the biometric detection device 100 is located. The processing unit performs fingerprint detection based on the fingerprint signal and performs heart rate detection based on the heart rate signal, and then determines whether the verification is passed based on the fingerprint detection results and the heart rate detection results, for example, the verification is passed when the fingerprint match is successful and the heart rate is detected, and the verification fails when the fingerprint matches but the heart rate is not detected.

[0043] After the ultrasonic detection module 110 sends the heart rate signal to the processing unit, the processing unit can determine the user's heart rate data based on the heart rate signal, and then display the heart rate data through a display screen, or play the heart rate data through an audio playback device, so that the user can grasp his or her health status at any time during work and study, thereby improving the user's satisfaction and enhancing the competitiveness of the product.

[0044] The touch component 130 is used as an interactive carrier between the biometric detection device 100 and the user, and is used to place a finger on the touch component 130 to achieve fingerprint detection and heart rate detection. The touch component 130 can protect the ultrasonic detection module 110 to prevent the user from directly contacting the ultrasonic detection module 110, thereby ensuring the safety of the user's use process and the working stability and reliability of the biometric detection device 100.

[0045] The ultrasonic detection module 110 transmits ultrasonic waves through the touch component 130 and receives reflected ultrasonic waves. When the user's finger is pressed on the finger contact surface of the touch component 130 during fingerprint recognition, the intensity of the ultrasonic wave will attenuate as the propagation distance increases. In order to ensure the accuracy of fingerprint and heart rate detection, the distance between the ultrasonic transceiver plane in the ultrasonic detection module 110 and the finger contact surface on the touch component 130 is less than or equal to 2 mm, ensuring that the emitted ultrasonic wave can reach the finger contact surface and can receive the ultrasonic wave reflected by the finger pressed on the finger contact surface.

[0046] In an embodiment of the present application, the ultrasonic detection module 110 can detect biometric signals through the touch component 130, and send the detected biometric signals to the processing unit, and the processing unit can perform fingerprint detection and / or heart rate detection based on the biometric signals. Since the ultrasonic detection module 110 can be used to collect fingerprint signals and heart rate signals, in an electronic device with fingerprint detection and heart rate detection requirements, the ultrasonic detection module provided in the embodiment of the present application can realize fingerprint detection and heart rate detection, without the need to separately equip a fingerprint sensor and a heart rate sensor, which reduces the occupation of the internal space of the electronic device, thereby increasing the degree of freedom of electronic device design.

[0047] When the ultrasonic detection module 110 collects fingerprint signals and heart rate signals, that is, the biometric signals include fingerprint signals and heart rate signals, the processing unit can perform biometric verification in combination with the fingerprint and heart rate. After the fingerprint and heart rate are verified, the device is unlocked, payment is made, or passwords are automatically filled in, etc., avoiding the situation of unlocking by a flat fingerprint image, thereby improving the security of the electronic device.

[0048] In one possible implementation, the touch component 130 may be a button or a specific area of ​​a shell of the electronic device where the biometric detection device 100 is located, thereby deploying the biometric detection device 100 at different locations in the electronic device, thereby improving the applicability of the biometric detection device 100 and allowing a higher degree of freedom in the design of the electronic device.

[0049] Figure 1B FIG. 1 is a schematic diagram of a biometric detection device according to another embodiment of the present application. Figure 1B As shown, the biometric detection device 100 includes not only the ultrasonic detection module 110 and the touch component 130 , but also a light emitting component 120 . The light emitting component 120 can generate a light signal through the touch component 130 , and the light signal can at least indicate the working status of the ultrasonic detection module 110 .

[0050] The light emitting component 120 can generate a light signal through the touch component 130, and the light signal can indicate the working state of the ultrasonic detection module 110. For example, when the ultrasonic detection module 110 is in the working state, the light emitting component 120 generates a light signal through the touch component 130, and when the ultrasonic detection module 110 is in the non-working state, the light emitting component 120 does not emit light. In addition to indicating the working state of the ultrasonic detection module 110, the light signal emitted by the light emitting component 120 can also indicate the verification results of the fingerprint and heart rate. For example, when both the fingerprint and the heart rate are verified, the light emitting component 120 generates a light signal through the touch component 130, and does not generate a light signal when the fingerprint or the heart rate verification fails.

[0051] The light emitting component 120 can emit light of different colors, thereby generating light signals of different colors through the touch component 130 to indicate different information through light signals of different colors. The light emitting component 120 can work under the control of the processing unit, that is, the light emission and light color of the light emitting component 120 are controlled by the processing unit.

[0052] In the embodiment of the present application, the light emitting component 120 can generate a light signal through the touch component 130 to indicate the working state of the ultrasonic detection module 110 through the light signal. The light signal generated by the light emitting component 120 can indicate the working state of the ultrasonic detection module 110, and the user can easily determine the working state of the ultrasonic detection module 110 based on the light signal, thereby improving the user experience.

[0053] Figure 2 FIG. 1 is a schematic diagram of a light emitting component according to an embodiment of the present application. Figure 2 As shown, the light emitting component 120 includes a first circuit board 121 and a plurality of LEDs (light emitting diodes) 122, the plurality of LEDs 122 are electrically connected to the first circuit board 121, and the first circuit board 121 is used to supply power to the plurality of LEDs 122. The side of the first circuit board 121 on which the LEDs 122 are mounted is opposite to the touch component 130.

[0054] A plurality of LEDs 122 are provided on the first circuit board 121. The first circuit board 121 can supply power to the LEDs 122 under the control of the processing unit so that the LEDs 122 can light up or turn off. The first circuit board 121 can be connected to the processing unit through a flat cable, or the processing unit can be connected to the first circuit board 121. Each LED 122 can emit light of the same or different colors. When each LED 122 emits light of the same color, the LEDs 122 can be controlled to be turned on at different frequencies to generate light that flashes at different frequencies, and the light that flashes at different frequencies indicates different information. When each LED 122 can emit light of at least two colors, different LEDs 122 can be controlled to be turned on to generate light of different colors, and different information is indicated by light of different colors.

[0055] The first circuit board 121 may be a printed circuit board (PCB) or a flexible printed circuit (FPC), which is not limited in the embodiment of the present application.

[0056] In the embodiment of the present application, the side of the first circuit board 121 on which the LED 122 is mounted is opposite to the touch component 130, that is, the LED 122 and the touch component 130 are located on the same side of the first circuit board 121, so that when the LED 122 is lit, the light emitted by the LED 122 can pass through the touch component 130, so that the user can observe the light emitted by the LED 122, thereby determining the information indicated by the light emitted by the LED 122, thereby improving the user's experience.

[0057] In a possible implementation, the touch component 130 may include a key cap. When the electronic device where the biometric detection device 100 is located is a laptop computer, the key cap may be deployed on the key area, the upper part of the keyboard area, the palm rest area, etc. of the laptop computer. As a component of the biometric detection device 100, the key cap can be used as a key cap in addition to being a finger carrier in the fingerprint detection and heart rate detection process, for example, it can be used as a key cap for a power button.

[0058] The key cap serves as a carrier of the ultrasonic detection module 110 and the light-emitting component 120 , and there must not be any air bubbles or micropores inside that may affect the performance. The key cap may be made of metal, glass, ceramic or plastic.

[0059] Figure 3 FIG. 1 is a cross-sectional schematic diagram of a key cap according to an embodiment of the present application. Figure 3 As shown, a receiving cavity 1311 is provided on the inner side of the button cap 131 , and the side of the first circuit board 121 on which the LED 122 is mounted is bonded to the edge of the receiving cavity 1311 by a lamp board bonding adhesive 1312 , and each LED 122 is located in the receiving cavity 1311 .

[0060] The outer side of the key cap 131 is a surface that can be touched by the user, that is, when performing fingerprint detection and heart rate detection, the user presses the finger on the outer side of the key cap 131. The first circuit board 121 is bonded to the inner side of the key cap 131 by the light board bonding glue 1312, and the light emitted by the LED 122 is transmitted from the inner side of the key cap 131 to the outer side of the key cap 131. The inner side of the key cap 131 is provided with a receiving cavity 1311, and the receiving cavity 1311 can be a pit with a rounded rectangular cross section. In the direction perpendicular to the first circuit board 121, the height of the LED 122 is less than or equal to the depth of the receiving cavity 1311, ensuring that when the first circuit board 121 is bonded to the inner side of the key cap 131, the receiving cavity 1311 can accommodate each LED 122.

[0061] The light board bonding glue 1312 can be glue, tape or film, etc. The light board bonding glue 1312 is arranged along the edge of the first circuit board 121, the edge of the first circuit board 121 is bonded to the edge of the accommodating cavity 1311, and the LED 122 arranged on the first circuit board 121 is located in the accommodating cavity 1311. Since the first circuit board 121 is bonded to the key cap 131, the key cap 131 can drive the first circuit board 121 to move. When the key cap 131 is used as a key cap, the side of the first circuit board 121 where the LED 122 is not installed contacts the key switch. When the key cap 131 is pressed, the first circuit board 121 drives the key switch to move, thereby achieving the purpose of triggering the key.

[0062] In the embodiment of the present application, the outer side surface of the button cap 131 is the contact surface of the finger when performing fingerprint and heart rate detection, and the inner side surface of the button cap 131 is provided with a accommodating cavity 1311. The side surface of the first circuit board 121 on which the LED 122 is mounted is bonded to the edge of the accommodating cavity 1311, so that each LED 122 mounted on the first circuit board 121 is located in the accommodating cavity 1311, so that the LED 122 does not occupy the height of the biometric detection device 100 alone, so that the biometric detection device 100 has a thinner thickness, reducing the installation space required for the deployment of the biometric detection device 100, thereby improving the applicability of the biometric detection device 100.

[0063] Figure 4A and Figure 4B FIG. 1 is a schematic diagram of a key cap according to another embodiment of the present invention. Figure 4A and Figure 4BAs shown, the key cap 131 includes a light shielding cover 1313 and a support body 1314. A first light shielding layer is provided on the inner side of the light shielding cover 1313, a first light-transmitting hole is provided on the first light shielding layer, and a light-transmitting first logo pattern 1315 is printed in the first light-transmitting hole. The support body 1314 is made of a light-guiding material, the outer side of the support body 1314 is attached to the inner side of the light shielding cover 1313, the first light shielding layer and the first logo pattern are sandwiched between the support body 1314 and the light shielding cover 1313, and a receiving cavity 1311 is provided on the inner side of the support body 1314. The support body 1314 can transmit the light emitted by the LED 122 to the first light-transmitting hole, so that at least part of the light emitted by the LED 122 can pass through the area where the first logo pattern 1315 is located on the light shield 1313, so that the first logo pattern 1315 is visible.

[0064] The light shield 1313 can be obtained by printing a light shielding layer and a logo pattern on a transparent film material. The material of the transparent film material can be polyethylene terephthalate (PET), polycarbonate (PC), etc. The thickness of the transparent film material is less than or equal to 2 mm. The first logo pattern 1315 that can transmit light is screen-printed on the area on the lower surface of the transparent film material where light is required (the area where the first light transmission hole is located). The first logo pattern 1315 can be a fingerprint pattern. The first light shielding layer is formed by screen-printing or spraying light shielding ink on other areas on the lower surface of the transparent film material. Then, the transparent film material is hot-pressed to form a desired shape to obtain the light shield 1313. The hot-pressed light shield 1313 is placed in a mold, and a layer of light-conducting plastic is injected and filled inside to form a support body 1314, so that the light shield 1313 and the support body 1314 become one body, and the light shielding layer and the first logo pattern 1315 are sandwiched between the light shield 1313 and the support body 1314. The material of the support body 1314 can be transparent PET, PC or polymethyl methacrylate (PMMA).

[0065] The light shielding layer is not light-transmissive, but the first logo pattern 1315 located in the first light-transmissive hole on the light shielding layer is light-transmissive. When the LED 122 emits light, the support 1314 can transmit the light emitted by the LED 122 to the first light-transmissive hole, so that at least part of the light emitted by the LED 122 passes through the first logo pattern 1315 from the first light-transmissive hole and then is emitted from the light shield 1313, thereby making the first logo pattern 1315 visible. It should be understood that the first logo pattern 1315 is drawn by continuous or discontinuous light-proof lines. When the LED 122 emits light, the line area in the first logo pattern 1315 is light-proof, and the non-line area is light-proof, thereby making the first logo pattern 1315 visible.

[0066] In the embodiment of the present application, the key cap 131 is a two-layer structure including a shading cover 1313 and a supporting body 1314. The shading layer and the first identification pattern 1315 are sandwiched between the shading cover 1313 and the supporting body 1314. When the user uses the fingerprint recognition and heart rate recognition functions, the first identification pattern 1315 will not be directly contacted, so that the identification pattern on the key cap 131 has strong friction resistance, which avoids the aesthetics of the product being affected by the wear of the identification pattern, ensures the durability of the biometric detection device 100, and can improve the user experience.

[0067] Figure 5 FIG. 1 is a cross-sectional schematic diagram of a biometric detection device according to another embodiment of the present application. Figure 5 As shown, the ultrasonic detection module 110 includes an ultrasonic sensor 111 , which is adhered to the bottom of the accommodating cavity 1311 by a sensor bonding adhesive 112 , and a plurality of LEDs 122 are distributed around the ultrasonic sensor 111 .

[0068] The ultrasonic detection module 110 includes an ultrasonic sensor 111, which can be an ultrasonic chip. The ultrasonic sensor 111 can emit waves toward the outer side of the key cap 131 and receive the reflected ultrasonic waves. The ultrasonic sensor 111 is attached to the inner side of the key cap 131 through the sensor adhesive 112, and can be attached to the bottom of the accommodating cavity 1311. The sensor adhesive 112 can be glue, tape, or film.

[0069] The size of the ultrasonic sensor 111 is smaller than the size of the bottom of the accommodating cavity 1311. The ultrasonic sensor 111 is pasted in the middle area of ​​the bottom of the accommodating cavity 1311. After the first circuit board 121 is pasted to the edge of the accommodating cavity 1311, the LEDs 122 are distributed around the ultrasonic sensor 111, that is, there is no obstruction between the LEDs 122 and the accommodating cavity 1311, so that the light emitted by the LEDs 122 can be transmitted to the support body 1314. Figure 5 The arrow in indicates the transmission direction of the light emitted by LED 122.

[0070] After the ultrasonic sensor 111 is attached to the bottom of the accommodating cavity 1311 , the distance between the contact surface of the key cap 131 (the outer surface of the light shield 1313 ) and the ultrasonic sensor 111 is less than or equal to 2 mm.

[0071] In the embodiment of the present application, the ultrasonic sensor 111 is pasted on the bottom of the accommodating cavity 1311, so that there is a small distance between the ultrasonic sensor 111 and the contact surface of the key cap 131, so that the ultrasonic sensor 111 can effectively collect the fingerprint signal and heart rate signal of the finger placed on the contact surface of the key cap 131, and ensure the accuracy of fingerprint detection and heart rate detection. The ultrasonic sensor 111 is located in the accommodating cavity 1311, and the ultrasonic sensor 111 does not occupy the height of the biometric detection device 100 alone, so that the biometric detection device 100 has a thinner thickness, reducing the installation space required for the deployment of the biometric detection device 100, thereby improving the applicability of the biometric detection device 100. The LED 122 is distributed around the ultrasonic sensor 111, so that the light emitted by the LED 122 can be smoothly transmitted to the support body 1314, and then the support body 1314 transmits the light to the first identification pattern 1315, so that the first identification pattern 1315 appears. The first identification pattern 1315 is located in the middle area of ​​the light shield 1313, that is, the first identification pattern 1315 is located directly above the ultrasonic sensor 111, and the LEDs 122 are distributed around the ultrasonic sensor 111, so that the light emitted by different LEDs 122 is evenly distributed in the support body 1314, thereby making the first identification pattern 1315 appear with uniform brightness, thereby ensuring the aesthetics of the identification pattern displayed by the biometric detection device 100.

[0072] Figure 6 FIG. 1 is a cross-sectional schematic diagram of a biometric detection device according to another embodiment of the present application. Figure 6 As shown, the touch component 130 includes a transparent cover plate 132 , and the light emitting component 120 includes a first circuit board 121 , a plurality of LEDs 122 and a light guide plate 123 .

[0073] A second light shielding layer 1321 is provided on at least part of the lower surface of the transparent cover plate 132, a second light-transmitting hole is provided on the second light shielding layer 1321, and a second light-transmitting identification pattern 1322 is printed in the second light-transmitting hole. A through hole 1211 is provided on the first circuit board 121, and a plurality of LEDs 122 are distributed around the edge of the through hole 1211. The upper surface of the light guide plate 123 is bonded to the lower surface of the transparent cover plate 132 by a light guide plate bonding adhesive 124, and the second light shielding layer 1321 and the second identification pattern 1322 are sandwiched between the light guide plate 123 and the transparent cover plate 132. The ultrasonic sensor 111 included in the ultrasonic detection module 110 is bonded to the lower surface of the light guide plate 123 by a sensor bonding adhesive 112. Along the axial direction of the through hole 1211, the ultrasonic sensor 111 is at least partially located in the through hole 1211, and the light guide plate 123 is at least partially located outside the through hole 1211.

[0074] The light guide plate 123 can transmit the light emitted by the LED 122 to the second light-transmitting hole, so that at least part of the light emitted by the LED 122 can pass through the area where the second identification pattern 1322 is located on the transparent cover plate 132, so that the second identification pattern 1322 is visible.

[0075] The material of the transparent cover plate 132 may be transparent glass, plastic, etc., and the thickness of the transparent cover plate 132 is greater than or equal to 0.2 mm. A light-transmitting identification pattern is screen-printed in the area on the lower surface of the transparent cover plate 132 where light is required (the area where the second light-transmitting hole is located) to form a second identification pattern 1322, and the second identification pattern 1322 may be a fingerprint pattern. A second light-shielding layer 1321 is formed by screen-printing or spraying light-shielding ink in other areas on the lower surface of the transparent cover plate 132. The light emitted by the LED 122 can pass through the transparent cover plate 132 through the area where the second identification pattern 1322 is located, but cannot pass through the area on the transparent cover plate 132 where the second light-shielding layer 1321 is located, thereby making the second identification pattern 1322 visible.

[0076] Since the light emitted by LED122 needs to pass through the light guide plate adhesive 124 to reach the second identification pattern 1322, the light guide plate adhesive 124 ensures that the light emitted by LED122 can penetrate and transmit the light emitted by LED122. The light guide plate adhesive 124 can be an OCA optical adhesive (Optically Clear Adhesive) film, liquid optical glue, etc.

[0077] The light guide plate 123 has the function of guiding and homogenizing light. The light guide plate 123 can change the propagation direction of the light emitted by the LED 122, so that the light emitted by the LED 122 passes through the second identification pattern 1322 on the lower surface of the transparent cover plate 132, and then passes through the transparent cover plate 132 from the lower surface of the transparent cover plate 132, thereby making the second identification pattern 1322 appear. Figure 6 The middle arrow indicates the transmission path of the light emitted by the LED 122. The material of the light guide plate 123 can be PC, PMMA, PET, etc. In order to ensure the light guiding effect of the light guide plate 123, the thickness of the light guide plate 123 is greater than or equal to 0.2 mm.

[0078] The sensor bonding glue 112 is used to bond the light guide plate 123 and the ultrasonic sensor 111. The sensor bonding glue 112 can be glue, tape or film. A second light shielding layer 1321, a light guide plate bonding glue 124, a light guide plate 123 and a sensor bonding glue 112 are sequentially stacked between the transparent cover plate 132 and the ultrasonic sensor 111. In order to ensure that the ultrasonic sensor 111 can accurately collect fingerprint signals and heart rate signals, the distance between the upper surface of the ultrasonic sensor 111 and the upper surface of the transparent cover plate 132 is less than or equal to 2 mm.

[0079] Along the axis direction of the through hole 1211, the ultrasonic sensor 111 is at least partially located in the through hole 1211, and the light guide plate 123 is at least partially located in the through hole 1211. The ultrasonic sensor 111 is at least partially located in the through hole 1211, which can reduce the space occupied by the ultrasonic sensor 111 in the biometric detection device 100, so that the biometric detection device 100 can have a smaller thickness, facilitate the installation of the biometric detection device 100 in an electronic device, and improve the applicability of the biometric detection device 100. The light guide plate 123 is at least partially located outside the through hole 1211, so that the light emitted by the LED 122 can be incident on the light guide plate 123, so that the light emitted by the LED 122 is transmitted to the area where the second identification pattern 1322 is located through the light guide plate 123, ensuring that the second identification pattern 1322 can be normally displayed.

[0080] In the embodiment of the present application, the transparent cover plate 132, the light guide plate 123 and the ultrasonic sensor 111 adopt a stacked structure, and the ultrasonic sensor 111 is at least partially located in the through hole 1211 opened on the first circuit board 121, so that the overall structure of the biometric detection device 100 is more compact, and the thickness of the biometric detection device 100 is reduced while reducing the space occupied by the biometric detection device 100, so that the biometric detection device 100 can be applied to small-sized, light, and compact electronic devices, ensuring that the biometric detection device 100 has strong applicability.

[0081] In one possible implementation, Figure 6 As shown, the transparent cover 132 may be a touch area and / or a display area in the electronic device where the biometric detection device 100 is located.

[0082] In an embodiment of the present application, when the biometric detection device 100 is deployed in an electronic device such as a laptop computer, the transparent cover 132 included in the biometric detection device 100 can be a panel of a touch area and / or a display area in the electronic device, for example, it can be a functional touch and display area carrier set in the upper area of ​​the keyboard. By using the panel of the touch area and / or the display area in the electronic device as the transparent cover 132 of the biometric detection device 100, the biometric detection device 100 can be integrated into the overall design of the electronic device, which can improve the aesthetics of the electronic device and reduce the weight of the biometric detection device 100.

[0083] In one possible implementation, Figure 6 As shown, the first circuit board 121 may be a circuit board in the electronic device where the biometric detection device 100 is located.

[0084] In an embodiment of the present application, when the biometric detection device 100 is deployed in an electronic device such as a laptop computer, the first circuit board 121 included in the biometric detection device 100 can be a circuit board of a touch area and / or a display area in the electronic device, for example, it can be a circuit board of a functional touch and display area set in the upper area of ​​a keyboard. The circuit board of the touch area and / or the display area in the electronic device is used as a circuit board of an LED in the biometric detection device 100. There is no need to set up a separate circuit board of an LED for the biometric detection device 100, thereby reducing the space occupied by the biometric detection device 100 and facilitating the installation of the biometric detection device 100 in an electronic device.

[0085] In one possible implementation, Figure 5 and Figure 6 As shown, the sensor bonding adhesive 112 includes a conductive foil and double-sided adhesive adhered to both sides of the conductive foil. The double-sided adhesive on one side of the conductive foil is bonded to the ultrasonic sensor 111, and the double-sided adhesive on the other side of the conductive foil is bonded to the bottom of the accommodating cavity 1311 or the lower surface of the light guide plate 123, ensuring that the ultrasonic sensor 111 can be firmly bonded to the bottom of the accommodating cavity 1311 or the lower surface of the light guide plate 123.

[0086] In a possible implementation, the conductive foil may send a proximity signal to the processing unit when a finger approaches the outer side of the touch component, so that the processing unit controls the ultrasonic detection module 110 to switch to a working state after receiving the proximity signal.

[0087] The sensor adhesive 112 includes two layers of double-sided adhesive and a conductive foil sandwiched between the two layers of double-sided adhesive. The ultrasonic sensor 111 can be fixed by the two layers of double-sided adhesive. The conductive foil can be used as a touch electrode. When a finger approaches the outer side of the touch component 130, the conductive foil will generate a proximity signal in the form of an electrical signal and send the proximity signal to the processing unit. The conductive foil is connected to the processing unit through a wire so that the conductive foil sends the proximity signal to the processing unit.

[0088] The conductive foil is a foil made of a conductive metal material, for example, the conductive foil may be a copper foil, a silver foil, a nickel alloy foil, or the like.

[0089] In the embodiment of the present application, a finger proximity sensing function can be realized by setting a conductive foil in the sensor bonding adhesive 112. When the finger is sensed to be close to the touch component 130, the processing unit can switch the ultrasonic detection module 110 from a non-working state to a working state to perform fingerprint detection and heart rate detection. When the finger is not sensed to be close to the touch component 130, the processing unit puts the ultrasonic detection module 110 into a non-working state, thereby reducing the power consumption of the biometric detection device 100 and improving the service life of the biometric detection device 100.

[0090] In a possible implementation, the conductive foil in the sensor bonding adhesive 112 may be a copper foil, that is, the sensor bonding adhesive 112 is a copper foil adhesive.

[0091] In the embodiment of the present application, since copper has good ductility and conductivity, copper foil is used as the conductive foil in the sensor bonding adhesive 112, so that the conductive foil has a thinner thickness and flexibility, and can sensitively sense the proximity of a finger to the touch component 130, thereby achieving a finger proximity sensing function while ensuring that the biometric detection device 100 has a lower cost.

[0092] Figure 7 is a schematic diagram of a biometric detection device including a key cap according to an embodiment of the present application, Figure 8 FIG. 1 is a schematic diagram of a biometric detection device including a transparent cover plate according to an embodiment of the present application. Figure 7 and Figure 8 As shown, the ultrasonic detection module 110 includes an ultrasonic sensor 111 , a second circuit board 113 and a connector 114 .

[0093] The ultrasonic sensor 111 and the connector 114 are electrically connected via the second circuit board 113, and the connector 114 is used to electrically connect to the processing unit. The ultrasonic sensor 111 can detect a biometric signal and transmit the biometric signal to the connector 114 via the second circuit board 113, and the connector 114 can transmit the received biometric signal to the processing unit.

[0094] In the embodiment of the present application, the ultrasonic sensor 111 can detect biometric signals, and the biometric signals can be converted into fingerprint signals and heart rate signals. After the biometric signals are sent to the processing unit, the processing unit can perform fingerprint detection based on the fingerprint signals, and can perform heart rate detection based on the heart rate signals. Therefore, the fingerprint detection function and the heart rate detection function can be realized by one ultrasonic sensor 111, reducing the number of devices required for detecting fingerprints and heart rates. Moreover, the entire biometric detection device 100 has a simple structure and occupies a small installation space, which makes the design freedom of the electronic device greater.

[0095] In one possible implementation, Figure 7 and Figure 8 As shown, the second circuit board 113 may be a flexible circuit board.

[0096] In the embodiment of the present application, since the ultrasonic sensor 111 is connected to the connector 114 through the second circuit board 113, the connector 114 is used to electrically connect the processing unit, and the processing unit is arranged on the main board of the electronic device. In order to facilitate the electrical connection between the connector 114 and the processing unit, the second circuit board 113 adopts a flexible circuit board, so that the installation position of the biometric detection device 100 in the electronic device has a higher degree of freedom, thereby improving the applicability of the biometric detection device 100.

[0097] It should be noted that Figure 7 and Figure 8 Two structures of biometric detection devices 100 are shown respectively. Figure 7 The touch component 130 in the biometric detection device 100 is a button cap 131. Figure 8 The touch component 130 in the biometric detection device 100 is a transparent cover plate 132. Figure 7 and Figure 8 The stacking relationship of the components included in the biometric detection device 100 is shown respectively. Figure 7 The structure and connection relationship of each component in the biometric detection device 100 shown in FIG. Figure 3 , 4A , 4B and 5, Figure 8 The structure and connection relationship of each component in the biometric detection device 100 shown in FIG. Figure 6 The description will not be repeated here.

[0098] Based on the biometric detection device 100 provided in each embodiment of the present application, fingerprint detection and heart rate detection are performed through an ultrasonic sensor 111, which reduces the number of devices required for detecting fingerprints and heart rates, and the entire biometric detection device 100 has a simple structure and occupies a small installation space, which makes the design freedom of the electronic device greater. When the ultrasonic sensor 111 is used for fingerprint detection, it can detect the heart rate at the same time, and the heart rate detection can assist the fingerprint detection, prevent the intrusion of fake fingerprints, and improve the safety and stability of the electronic device. Through the light signal generated by the light-emitting component 120, the user can quickly find the location of the biometric detection device 100 in a dark environment, which improves the user's experience. Ultrasonic waves have strong penetrating power and can penetrate the cover within 2mm, so that the structural strength of the biometric detection device 100 is better, and at the same time, the electronic device on which the biometric detection device 100 is installed has a higher degree of design freedom.

[0099] Electronic devices

[0100] The present application also provides an electronic device, which includes the biometric detection device 100 in any of the above embodiments. The electronic device can be a mobile phone, a laptop computer, a tablet computer, an attendance machine, or any other suitable device. Taking the electronic device as a laptop computer as an example, Fig. 9 and Fig.10 Two examples of electronic devices are shown. Fig. 9 As shown, when the structure of the biometric detection device 100 is as shown in Figure 7 As shown, the biometric detection device 100 can be deployed on the upper part of the keyboard area, key area 902 or palm rest area 903 of the notebook computer. Fig.10 As shown, when the structure of the biometric detection device 100 is as shown in Figure 8 As shown, the biometric detection device 100 can be deployed in the touch / display area 1001 above the keyboard.

[0101] It should be noted that, in order to illustrate the deployment area of ​​the biometric detection device 100, Fig. 9 A plurality of biometric detection devices 100 are shown in the electronic device shown, and an actual electronic device product may include one or more biometric detection devices 100 .

[0102] It should also be noted that since the electronic device is a specific application product of the biometric detection device 100, the structure and connection relationship of the biometric detection device 100 in the electronic device can be found in the description of the aforementioned biometric detection device embodiment, and the electronic device embodiment has beneficial effects corresponding to the biometric detection device 100, which will not be repeated here.

[0103] It should be understood that the specific examples in the embodiments of the present application are only intended to help those skilled in the art to better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application.

[0104] It should be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms "a", "above", and "said" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0105] Those of ordinary skill in the art will appreciate that the units of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0106] In the several embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0107] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0108] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0109] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0110] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A biometric detection device, characterized in that: include: Ultrasonic detection module and touch component; The ultrasonic detection module is used to detect a biometric signal through the touch component and send the biometric signal to a processing unit so that the processing unit performs fingerprint detection and / or heart rate detection according to the biometric signal; The distance between the ultrasonic transceiver plane in the ultrasonic detection module and the finger contact surface on the touch component is less than or equal to 2 mm; The device further comprises: a light emitting component; The light emitting component is used to generate a light signal through the touch component, wherein the light signal is at least used to indicate the working state of the ultrasonic detection module; The light emitting assembly comprises: a first circuit board and a plurality of LEDs; The plurality of LEDs are electrically connected to the first circuit board, and the first circuit board is used to supply power to the plurality of LEDs; The side of the first circuit board on which the LED is mounted is opposite to the touch component; The touch component includes: a button cap; The inner side of the button cap is provided with a receiving cavity, the side of the first circuit board on which the LED is mounted is bonded to the edge of the receiving cavity by a light board bonding adhesive, the multiple LEDs are located in the receiving cavity, and the light board bonding adhesive is provided along the edge of the first circuit board; The key cap comprises: a light shield and a support body; The inner side of the light shield is provided with a first light shielding layer, the first light shielding layer is provided with a first light-transmitting hole, and a light-transmitting first identification pattern is printed in the first light-transmitting hole; The support body is made of a light-guiding material, the outer side surface of the support body is in contact with the inner side surface of the light shield, the first light shielding layer and the first identification pattern are sandwiched between the support body and the light shield, and the inner side surface of the support body is provided with the accommodating cavity; The support body is used to transmit the light emitted by the LED to the first light-transmitting hole, so that at least part of the light emitted by the LED passes through the area where the first identification pattern is located on the light shield, so that the first identification pattern is visible.

2. The device according to claim 1, characterized in that The touch component is a key or a specific area of ​​a shell of the electronic device where the biometric detection device is located.

3. The device according to claim 1, characterized in that The ultrasonic detection module includes an ultrasonic sensor, which is adhered to the bottom of the accommodating cavity by sensor bonding adhesive, and the multiple LEDs are distributed around the ultrasonic sensor.

4. The device according to claim 3, characterized in that The sensor bonding adhesive comprises a conductive foil and double-sided adhesives attached to both sides of the conductive foil, and the double-sided adhesive on one side of the conductive foil is bonded to the ultrasonic sensor.

5. The device according to claim 4, characterized in that The conductive foil is used to send a proximity signal to the processing unit when a finger approaches the outer side of the touch component, so that the processing unit controls the ultrasonic detection module to switch to a working state after receiving the proximity signal.

6. The device according to claim 4, characterized in that The conductive foil includes a copper foil.

7. The device according to claim 3, characterized in that The ultrasonic detection module comprises: the ultrasonic sensor, a second circuit board and a connector; The ultrasonic sensor and the connector are electrically connected via the second circuit board, and the connector is used to be electrically connected to the processing unit; The ultrasonic sensor is used to detect the biometric signal and transmit the biometric signal to the connector through the second circuit board; The connector is used to transmit the received biometric signal to the processing unit.

8. The device according to claim 7, characterized in that The second circuit board includes a flexible circuit board.

9. An electronic device, characterized in that: include: A biometric detection device as claimed in any one of claims 1 to 8.

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