Biological feature detection apparatus and electronic device

Abstract

Provided in the embodiments of the present application are a biological feature detection apparatus and an electronic device. The biological feature detection apparatus comprises an ultrasonic detection module and a touch assembly, wherein the ultrasonic detection module is used for detecting a biological feature signal through the touch assembly and sending the biological feature signal to a processing unit, so that the processing unit performs fingerprint inspection and / or heart rate measurement according to the biological feature signal; and the distance between an ultrasonic transceiving plane in the ultrasonic detection module and a finger contact surface on the touch assembly is less than or equal to 2 mm. The solution can improve the design freedom degree of electronic devices having the requirements for fingerprint inspection and heart rate measurement.

Description

Biometric detection devices and electronic devices

[0001] This application claims priority to the Chinese invention patent application with application date of August 1, 2023, application number "202310964036.0", and patent name "Biometric Detection Device and Electronic Device", the entire contents of which are hereby incorporated by reference. Technical Field

[0002] 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

[0003] Due to the immutability, uniqueness, and convenience of fingerprints, fingerprint detection is widely used as a biometric identification method for unlocking electronic devices, electronic payments, and password management. During fingerprint detection, the fingerprint sensor captures the fingerprint image, which is then matched with a pre-stored fingerprint template to obtain a match result. If the match is successful, the user's identity is authenticated, and the device can be unlocked, payment can be made, or passwords can be automatically filled.

[0004] Currently, 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.

[0005] However, some electronic devices have the need for 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 equipped in the electronic device. The fingerprint sensor and heart rate sensor will occupy a large space inside the electronic device, resulting in a low degree of design freedom of the electronic device.

[0006] Summary of the Invention

[0007] In view of this, embodiments of the present application provide a biometric detection device and an electronic device, which can improve the security of the electronic device.

[0008] 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.

[0009] In a possible implementation, the touch component is a key or a specific area of ​​a housing of the electronic device where the biometric detection device is located.

[0010] In one possible implementation, the biometric detection device further includes a light-emitting component; the light-emitting component is configured to generate a light signal through the touch component, wherein the light signal is at least configured to indicate a working status of the ultrasonic detection module.

[0011] In one possible implementation, the light-emitting component includes: a first circuit board and multiple LEDs; the multiple LEDs are electrically connected to the first circuit board, and the first circuit board is used to power the multiple LEDs; the side of the first circuit board where the LEDs are mounted is opposite to the touch component.

[0012] 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 light board bonding glue, and the multiple LEDs are located in the receiving cavity.

[0013] In one possible implementation, the key cap includes: a light-shielding cover and a support 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 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-shielding cover, the first light-shielding layer and the first identification pattern are sandwiched between the support body and the light-shielding cover, 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 on the light-shielding cover where the first identification pattern is located, so that the first identification pattern appears.

[0014] In a possible implementation, the ultrasonic detection module includes an ultrasonic sensor, the ultrasonic sensor is attached to the bottom of the accommodating cavity by a sensor bonding adhesive, and the plurality of LEDs are distributed around the ultrasonic sensor.

[0015] In one possible implementation, the touch component includes a transparent cover plate, and the light-emitting component further includes a light guide plate; a second light-shielding layer is provided on at least a portion of the lower surface of the transparent cover plate, a second light-transmitting hole is provided on the second light-shielding layer, and a translucent second 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 adhesive, 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 adhesive, along the axis 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 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 of ​​the transparent cover plate where the second identification pattern is located, making the second identification pattern visible.

[0016] In one 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.

[0017] In a possible implementation, the sensor bonding adhesive includes a conductive foil and double-sided adhesive tape attached to both sides of the conductive foil, and the double-sided adhesive tape on one side of the conductive foil is bonded to the ultrasonic sensor.

[0018] In a possible implementation, 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.

[0019] In a possible implementation, the conductive foil includes copper foil.

[0020] 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.

[0021] In a possible implementation, the second circuit board includes a flexible circuit board.

[0022] In a second aspect, an embodiment of the present application provides an electronic device, comprising a biometric detection device as provided in the first aspect or any possible implementation of the first aspect.

[0023] 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, which 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 that have fingerprint detection and heart rate detection requirements, fingerprint detection and heart rate detection can be achieved by equipping the ultrasonic detection module provided by the embodiment of the present application, without the need to equip a fingerprint sensor and a heart rate sensor separately, reducing the internal space occupied by the electronic device, thereby increasing the degree of freedom in the design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0025] FIG1A is a schematic diagram of a biometric detection device according to an embodiment of the present application;

[0026] FIG1B is a schematic diagram of a biometric detection device according to another embodiment of the present application;

[0027] FIG2 is a schematic diagram of a light emitting assembly according to an embodiment of the present application;

[0028] FIG3 is a cross-sectional schematic diagram of a key cap according to an embodiment of the present application;

[0029] FIG4A is a schematic diagram of the inner side structure of a key cap according to an embodiment of the present application;

[0030] FIG4B is a schematic diagram of the outer side structure of a key cap according to an embodiment of the present application;

[0031] FIG5 is a cross-sectional schematic diagram of a biometric detection device according to an embodiment of the present application;

[0032] FIG6 is a cross-sectional schematic diagram of a biometric detection device according to another embodiment of the present application;

[0033] FIG7 is a schematic diagram of a biometric detection device including a key cap according to an embodiment of the present application;

[0034] FIG8 is a schematic diagram of a biometric detection device including a transparent cover according to an embodiment of the present application;

[0035] FIG9 is a schematic diagram of an electronic device according to an embodiment of the present application;

[0036] FIG10 is a schematic diagram of an electronic device according to another embodiment of the present application. DETAILED DESCRIPTION

[0037] 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. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0038] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0039] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as 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".

[0040] Biometric detection device

[0041] FIG1A 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. As shown in FIG1A , 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 a processing unit so that the processing unit performs fingerprint detection and / or heart rate detection based on 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.

[0042] 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.

[0043] The ultrasonic detection module 110 can emit ultrasonic waves and receive ultrasonic signals transmitted back by external structures. When a user places a finger 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, which then passes through the touch component 130 and is received by the ultrasonic detection module 110. Because different fingerprints reflect ultrasonic waves differently, and the presence or absence of a heart rate also affects ultrasonic reflection, the ultrasonic detection module 110 can extract fingerprint and heart rate signals from the reflected ultrasonic waves. Fingerprint detection can be performed based on the fingerprint signal, and heart rate detection can be performed based on the heart rate signal.

[0044] 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, which performs fingerprint detection based on the fingerprint signal and 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 successful based on the fingerprint detection results and the heart rate detection results. For example, the verification is successful when the fingerprint match is successful and the heart rate is detected, and the verification fails when the fingerprint match is successful but the heart rate is not detected.

[0045] 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.

[0046] The touch assembly 130 serves as the interface between the biometric detection device 100 and the user. A finger can be placed on the touch assembly 130 to perform fingerprint and heart rate detection. The touch assembly 130 protects the ultrasonic detection module 110, preventing direct contact with the user. This ensures user safety and the stability and reliability of the biometric detection device 100.

[0047] The ultrasonic detection module 110 transmits ultrasonic waves through the touch component 130 and receives reflected ultrasonic waves. When performing fingerprint recognition, the user's finger presses on the finger contact surface of the touch component 130. 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 2mm, 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.

[0048] 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, which 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, fingerprint detection and heart rate detection can be achieved by equipping the ultrasonic detection module provided by the embodiment of the present application, without the need to equip a fingerprint sensor and a heart rate sensor separately, thereby reducing the internal space occupied by the electronic device, thereby increasing the degree of freedom in the design of the electronic device.

[0049] 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 through a flat fingerprint image, thereby improving the security of electronic devices.

[0050] In one possible implementation, the touch component 130 can be a button or a specific area of ​​the shell of the electronic device where the biometric detection device 100 is located, so that the biometric detection device 100 can be deployed at different locations in the electronic device, thereby improving the applicability of the biometric detection device 100 and allowing greater freedom in the design of the electronic device.

[0051] Figure 1B is a schematic diagram of a biometric detection device according to another embodiment of the present application. As shown in Figure 1B , biometric detection device 100 includes, in addition to ultrasonic detection module 110 and touch component 130 , a light-emitting component 120 . Light-emitting component 120 can generate a light signal through touch component 130 , which can at least indicate the operating status of ultrasonic detection module 110 .

[0052] The light-emitting component 120 can generate a light signal through the touch component 130, and the light signal can indicate the operating status of the ultrasonic detection module 110. For example, when the ultrasonic detection module 110 is in the operating state, the light-emitting component 120 generates a light signal through the touch component 130. When the ultrasonic detection module 110 is in the non-operating state, the light-emitting component 120 does not emit light. In addition to indicating the operating status of the ultrasonic detection module 110, the light signal emitted by the light-emitting component 120 can also indicate the verification results of fingerprints and heart rate. For example, if both fingerprints and heart rate verifications are passed, the light-emitting component 120 generates a light signal through the touch component 130, but does not generate a light signal if fingerprint or heart rate verification fails.

[0053] The light-emitting component 120 can emit light of different colors, thereby generating light signals of different colors through the touch component 130, thereby indicating different information through the light signals of different colors. The light-emitting component 120 can operate under the control of the processing unit, that is, the processing unit controls the light emission and light color of the light-emitting component 120.

[0054] 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 operating status of the ultrasonic detection module 110. The light signal generated by the light-emitting component 120 can indicate the operating status of the ultrasonic detection module 110. The user can easily determine the operating status of the ultrasonic detection module 110 based on the light signal, thereby improving the user experience.

[0055] Figure 2 is a schematic diagram of a light-emitting assembly according to one embodiment of the present application. As shown in Figure 2 , the light-emitting assembly 120 includes a first circuit board 121 and multiple LEDs (light-emitting diodes) 122. The multiple LEDs 122 are electrically connected to the first circuit board 121, which is used to power the multiple LEDs 122. The side of the first circuit board 121 where the LEDs 122 are mounted faces the touch assembly 130.

[0056] A plurality of LEDs 122 are provided on the first circuit board 121. The first circuit board 121 can power the LEDs 122 under the control of the processing unit so that the LEDs 122 light up or go out. The first circuit board 121 can be connected to the processing unit via a 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 turn on at different frequencies to generate light that flashes at different frequencies. 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 turn on to generate light of different colors. Different colors of light indicate different information.

[0057] 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.

[0058] 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. Therefore, 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 and thereby determine the information indicated by the light emitted by the LED 122, thereby improving the user experience.

[0059] In one possible implementation, the touch component 130 may include a keycap. When the electronic device in which the biometric detection device 100 is located is a laptop computer, the keycap may be deployed on the laptop computer's key area, upper portion of the keyboard area, palm rest area, etc. As a component of the biometric detection device 100, the keycap not only serves as a finger carrier during fingerprint detection and heart rate detection, but can also be used as a keycap, for example, as a keycap for a power button.

[0060] The key cap serves as a carrier for the ultrasonic detection module 110 and the light-emitting component 120 , and must not have any air bubbles or micropores inside that may affect the performance. The key cap can be made of metal, glass, ceramic, or plastic.

[0061] Figure 3 is a cross-sectional schematic diagram of a keycap according to an embodiment of the present application. As shown in Figure 3 , the inner side of the keycap 131 is provided with a receiving cavity 1311 . The side of the first circuit board 121 on which the LEDs 122 are mounted is bonded to the edge of the receiving cavity 1311 via a light board bonding adhesive 1312 , with each LED 122 positioned within the receiving cavity 1311 .

[0062] The outer surface of the key cap 131 is the surface that can be touched by the user. That is, when performing fingerprint detection and heart rate detection, the user presses their finger on the outer surface of the key cap 131. The first circuit board 121 is bonded to the inner surface of the key cap 131 using light board bonding adhesive 1312. 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. 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. This ensures 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.

[0063] The light board bonding adhesive 1312 can be glue, tape, or film. The light board bonding adhesive 1312 is set 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. Because 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 without the LED 122 installed contacts the key switch. When the key cap 131 is pressed, the first circuit board 121 drives the key switch to move, achieving the purpose of triggering the key.

[0064] 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 deploying the biometric detection device 100, thereby improving the applicability of the biometric detection device 100.

[0065] Figures 4A and 4B are schematic diagrams of a keycap according to another embodiment of the present application. As shown in Figures 4A and 4B, keycap 131 includes a light shield 1313 and a support 1314. The inner side of light shield 1313 is provided with a first light-shielding layer, which has a first light-transmitting hole formed therein. A translucent first logo pattern 1315 is printed within the first light-transmitting hole. Support 1314 is made of a light-guiding material. The outer side of support 1314 is bonded to the inner side of light shield 1313, sandwiching the first light-shielding layer and the first logo pattern between them. A cavity 1311 is provided on the inner side of support 1314. Support 1314 can transmit light emitted by LED 122 to the first light-transmitting hole, allowing at least a portion of the light emitted by LED 122 to pass through the area of ​​light shield 1313 where first logo pattern 1315 is located, making first logo pattern 1315 visible.

[0066] Light shield 1313 can be produced by printing a light-shielding layer and a logo pattern on a transparent film. The transparent film can be made of polyethylene terephthalate (PET), polycarbonate (PC), or other materials, and the thickness of the transparent film is less than or equal to 2 mm. A light-transmitting first logo pattern 1315 is screen-printed on the area on the lower surface of the transparent film where light is required (the area where the first light-transmitting hole is located). First logo pattern 1315 can be a fingerprint pattern. Light-shielding ink is screen-printed or spray-painted on other areas of the lower surface of the transparent film to form the first light-shielding layer. The transparent film is then hot-pressed into the desired shape to produce light shield 1313. The hot-pressed light shield 1313 is placed in a mold, and a layer of light-conducting plastic is injection-molded inside to form a support body 1314. The light shield 1313 and support body 1314 are integrated, with the light-shielding layer and first logo pattern 1315 sandwiched between the two. The material of the support 1314 can be transparent PET, PC or polymethyl methacrylate (PMMA).

[0067] The light-shielding layer is non-transmissive, but first logo pattern 1315 located within the first light-transmitting hole in the light-shielding layer is transmissive. When LED 122 emits light, support 1314 can transmit the light emitted by LED 122 to the first light-transmitting hole, so that at least a portion of the light emitted by LED 122 passes through the first light-transmitting hole, passes through first logo pattern 1315, and then exits light shield 1313, thereby revealing first logo pattern 1315. It should be understood that first logo pattern 1315 is drawn with continuous or discontinuous opaque lines. When LED 122 emits light, the lined areas of first logo pattern 1315 are opaque, while the non-lined areas are transmissive, thereby revealing first logo pattern 1315.

[0068] In the embodiment of the present application, the key cap 131 is a two-layer structure including a light shield 1313 and a support body 1314. The light shielding layer and the first identification pattern 1315 are sandwiched between the light shield 1313 and the support 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, avoiding the wear of the identification pattern affecting the aesthetics of the product, ensuring the durability of the biometric detection device 100, and improving the user experience.

[0069] Figure 5 is a cross-sectional schematic diagram of a biometric detection device according to another embodiment of the present application. As shown in Figure 5 , an ultrasonic detection module 110 includes an ultrasonic sensor 111 , which is attached to the bottom of a receiving cavity 1311 via sensor adhesive 112 , and a plurality of LEDs 122 are distributed around the ultrasonic sensor 111 .

[0070] The ultrasonic detection module 110 includes an ultrasonic sensor 111, which can be an ultrasonic chip. The ultrasonic sensor 111 emits ultrasonic waves toward the outer surface of the keycap 131 and receives reflected ultrasonic waves. The ultrasonic sensor 111 is attached to the inner surface of the keycap 131, specifically to the bottom of the accommodating cavity 1311, using sensor adhesive 112. The sensor adhesive 112 can be glue, tape, or film.

[0071] Ultrasonic sensor 111 is smaller than the bottom of cavity 1311 and is attached to the center of the bottom of cavity 1311. After first circuit board 121 is attached to the edge of cavity 1311, LEDs 122 are distributed around ultrasonic sensor 111. This means there is no obstruction between LEDs 122 and cavity 1311, allowing light from LEDs 122 to be transmitted into support body 1314. The arrows in FIG5 indicate the direction of light transmission from LEDs 122.

[0072] 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.

[0073] In the embodiment of the present application, the ultrasonic sensor 111 is attached to the bottom of the accommodating cavity 1311, ensuring a small distance between the contact surface of the ultrasonic sensor 111 and the keycap 131. This allows the ultrasonic sensor 111 to effectively collect fingerprint and heart rate signals from a finger placed on the contact surface of the keycap 131, ensuring the accuracy of fingerprint and heart rate detection. The ultrasonic sensor 111 is located within the accommodating cavity 1311 and does not occupy any height of the biometric detection device 100. This allows the biometric detection device 100 to be thinner, reducing the installation space required for deployment and thereby improving the applicability of the biometric detection device 100. The LEDs 122 are distributed around the ultrasonic sensor 111, allowing light emitted by the LEDs 122 to be smoothly transmitted to the support body 1314. The support body 1314 then transmits the light to the first identification pattern 1315, causing the first identification pattern 1315 to appear. 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, ensuring the aesthetics of the identification pattern displayed by the biometric detection device 100.

[0074] FIG6 is a cross-sectional view of a biometric detection device according to another embodiment of the present invention. As shown in FIG6 , the touch assembly 130 includes a transparent cover 132 , and the light emitting assembly 120 includes a first circuit board 121 , a plurality of LEDs 122 , and a light guide plate 123 .

[0075] A second light-shielding layer 1321 is provided on at least a portion of the lower surface of the transparent cover plate 132. A second light-transmitting hole is defined in the second light-shielding layer 1321, and a translucent second identification pattern 1322 is printed within the second light-transmitting hole. A through hole 1211 is defined in 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 via light guide plate bonding adhesive 124. 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 adhered to the lower surface of the light guide plate 123 via sensor bonding adhesive 112. Along the axis of the through hole 1211, the ultrasonic sensor 111 is at least partially located within the through hole 1211, while the light guide plate 123 is at least partially located outside the through hole 1211.

[0076] 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 passes through the area where the second identification pattern 1322 is located on the transparent cover 132, making the second identification pattern 1322 visible.

[0077] The transparent cover plate 132 can be made of transparent glass, plastic, or the like, and has a thickness greater than or equal to 0.2 mm. A translucent identification pattern is screen-printed on the lower surface of the transparent cover plate 132 in the area where light is required (the area where the second light-transmitting hole is located), forming a second identification pattern 1322. The second identification pattern 1322 can be a fingerprint pattern. A second light-shielding layer 1321 is formed by screen-printing or spray-coating light-shielding ink on other areas of the lower surface of the transparent cover plate 132. Light emitted by the LED 122 can pass through the transparent cover plate 132 in the area where the second identification pattern 1322 is located, but cannot pass through the area of ​​the transparent cover plate 132 where the second light-shielding layer 1321 is located, thereby making the second identification pattern 1322 visible.

[0078] 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 adhesive, etc.

[0079] Light guide plate 123 guides and evens light. It redirects the light emitted by LED 122, allowing it to pass through second identification pattern 1322 on the lower surface of transparent cover plate 132, then through the lower surface of transparent cover plate 132, thereby revealing second identification pattern 1322. The arrows in Figure 6 indicate the light transmission path of LED 122. Light guide plate 123 can be made of materials such as PC, PMMA, and PET. To ensure effective light guidance, the thickness of light guide plate 123 must be greater than or equal to 0.2 mm.

[0080] Sensor bonding adhesive 112 is used to bond the light guide plate 123 to the ultrasonic sensor 111. Sensor bonding adhesive 112 can be glue, tape, or film. A second light-shielding layer 1321, light guide plate bonding adhesive 124, light guide plate 123, and sensor bonding adhesive 112 are stacked in sequence between the transparent cover plate 132 and the ultrasonic sensor 111. To ensure that the ultrasonic sensor 111 can accurately capture fingerprint 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.

[0081] Along the axis of through-hole 1211, ultrasonic sensor 111 is at least partially located within through-hole 1211, and light guide plate 123 is also at least partially located within through-hole 1211. Positioning ultrasonic sensor 111 at least partially within through-hole 1211 reduces the space occupied by ultrasonic sensor 111 within biometric detection device 100, thereby reducing the thickness of biometric detection device 100, facilitating installation of biometric detection device 100 in electronic devices, and improving the applicability of biometric detection device 100. Light guide plate 123 is at least partially located outside through-hole 1211, allowing light emitted by LED 122 to enter light guide plate 123. Light from LED 122 is then transmitted through light guide plate 123 to the area where second identification pattern 1322 is located, ensuring proper display of second identification pattern 1322.

[0082] 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. The ultrasonic sensor 111 is at least partially located in the through hole 1211 opened on the first circuit board 121. This makes the overall structure of the biometric detection device 100 more compact, reduces the thickness of the biometric detection device 100, and reduces the space occupied by the biometric detection device 100. This allows the biometric detection device 100 to be used in small, light, and compact electronic devices, ensuring that the biometric detection device 100 has strong applicability.

[0083] In a possible implementation, as shown in FIG6 , 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.

[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 transparent cover 132 included in the biometric detection device 100 can be a panel of the touch area and / or 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 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.

[0085] In a possible implementation, as shown in FIG6 , the first circuit board 121 may be a circuit board in the electronic device where the biometric detection device 100 is located.

[0086] 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 the touch area and / or display area in the electronic device, for example, it can be a circuit board of the functional touch and display area set in the upper area of ​​the keyboard. The circuit board of the touch area and / or display area in the electronic device is used as the circuit board of the LED in the biometric detection device 100. There is no need to set up a separate circuit board for the 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 the electronic device.

[0087] In one possible implementation, as shown in Figures 5 and 6, the sensor bonding adhesive 112 includes a conductive foil and double-sided tape adhered to both sides of the conductive foil. The double-sided tape on one side of the conductive foil is bonded to the ultrasonic sensor 111, and the double-sided tape 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.

[0088] 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.

[0089] Sensor adhesive 112 includes two layers of double-sided tape and a conductive foil sandwiched between them. The two layers of double-sided tape secure the ultrasonic sensor 111. The conductive foil acts as a touch electrode. When a finger approaches the outer surface of the touch assembly 130, the conductive foil generates an electrical proximity signal and transmits the proximity signal to the processing unit. The conductive foil is connected to the processing unit via a wire, allowing the conductive foil to transmit the proximity signal to the processing unit.

[0090] The conductive foil is a foil made of a conductive metal material, for example, the conductive foil can be copper foil, silver foil, nickel alloy foil, etc.

[0091] In an embodiment of the present application, a finger proximity sensing function can be achieved by setting a conductive foil in the sensor bonding adhesive 112. When a finger is sensed to be approaching 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 a finger is not sensed to be approaching the touch component 130, the processing unit causes the ultrasonic detection module 110 to enter 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.

[0092] In a possible implementation, the conductive foil in the sensor bonding adhesive 112 may be copper foil, that is, the sensor bonding adhesive 112 is copper foil adhesive.

[0093] 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. This allows the conductive foil to have a thinner thickness and flexibility, and can sensitively sense the proximity of a finger to the touch component 130. This ensures that the biometric detection device 100 has a lower cost while achieving the finger proximity sensing function.

[0094] Figure 7 is a schematic diagram of a biometric detection device including a keycap according to an embodiment of the present application, and Figure 8 is a schematic diagram of a biometric detection device including a transparent cover according to an embodiment of the present application. As shown in Figures 7 and 8 , the ultrasonic detection module 110 includes an ultrasonic sensor 111, a second circuit board 113, and a connector 114.

[0095] Ultrasonic sensor 111 and connector 114 are electrically connected via second circuit board 113. Connector 114 is electrically connected to the processing unit. Ultrasonic sensor 111 can detect biometric signals and transmit the biometric signals to connector 114 via second circuit board 113. Connector 114 can then transmit the received biometric signals to the processing unit.

[0096] 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 fingerprint and heart rate detection. Moreover, the entire biometric detection device 100 has a simple structure and occupies a small installation space, which allows greater design freedom for electronic equipment.

[0097] In a possible implementation, as shown in FIG. 7 and FIG. 8 , the second circuit board 113 may be a flexible circuit board.

[0098] 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.

[0099] It should be noted that Figures 7 and 8 respectively show two structures of biometric detection devices 100. The touch component 130 in the biometric detection device 100 shown in Figure 7 is a button cap 131, and the touch component 130 in the biometric detection device 100 shown in Figure 8 is a transparent cover 132. Figures 7 and 8 respectively show the stacking relationship of the various components included in the biometric detection device 100. The structure and connection relationship of the various components in the biometric detection device 100 shown in Figure 7 can be found in the description of Figures 3, 4A, 4B and 5 in the above embodiment. The structure and connection relationship of the various components in the biometric detection device 100 shown in Figure 8 can be found in the description of Figure 6 in the above embodiment, and will not be repeated here.

[0100] 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 fingerprint and heart rate detection. In addition, the entire biometric detection device 100 has a simple structure and occupies a small installation space, which allows greater design freedom for electronic devices. When the ultrasonic sensor 111 is used for fingerprint detection, it can also detect heart rate, and heart rate detection can assist fingerprint detection, prevent the intrusion of fake fingerprints, and improve the security and stability of electronic devices. 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, improving the user experience. Ultrasonic waves have strong penetrating power and can penetrate cover plates within 2 mm, which makes the structural strength of the biometric detection device 100 better and can also enable the electronic device on which the biometric detection device 100 is installed to have a higher degree of design freedom.

[0101] electronic devices

[0102] An embodiment of 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 various suitable devices such as a mobile phone, a laptop computer, a tablet computer, and an attendance machine. Taking the electronic device as a laptop computer as an example, Figures 9 and 10 show two examples of electronic devices. As shown in Figure 9, when the structure of the biometric detection device 100 is as shown in Figure 7, the biometric detection device 100 can be deployed on the upper part of the keyboard area, the key area 902, or the palm rest area 903 of the laptop computer. As shown in Figure 10, when the structure of the biometric detection device 100 is as shown in Figure 8, the biometric detection device 100 can be deployed in the touch / display area 1001 on the upper part of the keyboard.

[0103] It should be noted that, in order to illustrate the deployable area of ​​the biometric detection device 100, multiple biometric detection devices 100 are shown in the electronic device shown in FIG9 , and an actual electronic device product may include one or more biometric detection devices 100.

[0104] 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 referred to the description in the aforementioned biometric detection device embodiment, and the electronic device embodiment has corresponding beneficial effects to the biometric detection device 100, which will not be repeated here.

[0105] 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 better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application.

[0106] It should be understood that the terms used in the embodiments of the present application and the appended claims are for the purpose of describing specific embodiments only 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 intended to include the plural forms, unless the context clearly indicates otherwise.

[0107] Those skilled in the art will appreciate that the units of the various examples 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.

[0108] In the several embodiments provided in this 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, 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 can be electrical, mechanical or other forms of connection.

[0109] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across 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.

[0110] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0111] 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 for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0112] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection 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.

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 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.

4. The device according to claim 3, characterized in that 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.

5. The device according to claim 4, characterized in that The touch component includes: a button cap; The inner side of the button cap is provided with a receiving cavity, and the side of the first circuit board on which the LED is mounted is bonded to the edge of the receiving cavity by light board bonding adhesive, and the multiple LEDs are located in the receiving cavity.

6. The device according to claim 5, characterized in that 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.

7. The device according to claim 6, 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.

8. The device according to claim 4, characterized in that 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 opened on the second light-transmitting hole, and a second light-transmitting logo pattern is printed in the second light-transmitting hole; A through hole is provided on the first circuit board, and the plurality of 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 adhesive, and the second light shielding layer and the second identification pattern is 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 a sensor bonding adhesive, 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 transmit 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 is visible.

9. The device according to claim 8, characterized in that The transparent cover plate 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.

10. The device according to claim 7 or 8, 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.

11. The device according to claim 10, 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.

12. The device according to claim 10, characterized in that The conductive foil includes a copper foil.

13. The device according to claim 7 or 8, 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.

14. The device according to claim 13, characterized in that The second circuit board includes a flexible circuit board.

15. An electronic device, characterized in that: include: A biometric detection device as claimed in any one of claims 1 to 14.

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