Fingerprint module and electronic equipment

Abstract

The invention discloses a fingerprint module and electronic equipment. Wherein the fingerprint module comprises an ultrasonic fingerprint identification part; a piezoelectric part; the piezoelectric part is located between the ultrasonic fingerprint identification part and the supporting part, the supporting part is used for installing and positioning the piezoelectric part, the supporting part comprises a supporting plate and a first bonding part, the first bonding part is connected between the supporting plate and the piezoelectric part, and a hollow installing cavity is defined by the piezoelectric part, the supporting plate and the first bonding part.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a fingerprint module and an electronic equipment. Background Art

[0002] In the related art, a mobile phone includes a fingerprint module, a screen and a frame. The fingerprint module is bonded to the screen, and the fingerprint module is spaced apart from the frame. As the market recognizes the thinness of mobile phones, the rigidity of the screen of the mobile phone is getting weaker and weaker, and the support capacity of the fingerprint module is reduced. The fingerprint module is prone to collide with the frame under the action of external force, and the sound waves will be transmitted and diverged by the frame, which will cause the recognition accuracy of the fingerprint module to decrease or even fail. At the same time, the fingerprint module is prone to be scratched by the frame. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a fingerprint module and an electronic device, which can effectively solve or improve the technical problem that the fingerprint module is easily in contact with the frame under the action of external force, resulting in a decrease in the recognition accuracy of the fingerprint module or even failure.

[0004] In the first aspect, an embodiment of the present application provides a fingerprint module, including: an ultrasonic fingerprint recognition part; a piezoelectric part; a support member, wherein the piezoelectric part is located between the ultrasonic fingerprint recognition part and the support member, and the support member is used for installing and positioning the piezoelectric part. The support member includes a support plate and a first bonding part, and the first bonding part is connected between the support plate and the piezoelectric part. The piezoelectric part, the support plate and the first bonding part enclose a hollow installation cavity.

[0005] In a second aspect, an embodiment of the present application provides an electronic device, comprising: a frame; a screen connected to the frame; and the fingerprint module in the first aspect, wherein the second bonding portion of the fingerprint module is connected to the screen, and the support member is arranged relative to the frame.

[0006] In the embodiment of the present application, the fingerprint module includes an ultrasonic fingerprint recognition unit, a piezoelectric unit and a support member.

[0007] The piezoelectric part is located between the ultrasonic fingerprint recognition part and the support, and the support is used for the installation and positioning of the piezoelectric part. That is to say, after the fingerprint module is assembled in the electronic device, the ultrasonic fingerprint recognition part is arranged relative to the screen of the electronic device, the support of the fingerprint module is arranged relative to the frame of the electronic device, and the support is supported between the piezoelectric part and the frame. In this way, under the action of external force, when the fingerprint module moves toward the frame due to the weakening of the rigidity of the screen, the support will abut between the frame and the piezoelectric part, and the piezoelectric part will not directly contact the frame. In this way, it can avoid the situation where the frame damages the piezoelectric part and the ultrasonic fingerprint recognition part due to the collision of the electronic device, and provide structural support to ensure the use function of the fingerprint module.

[0008] Furthermore, the support member includes a support plate and a first adhesive portion, the support plate and the piezoelectric portion are arranged at intervals, and the first adhesive portion is connected between the support plate and the piezoelectric portion. The piezoelectric portion, the support plate and the first adhesive portion enclose a hollow installation cavity. The installation cavity is filled with air, and the acoustic impedance of the material of the fingerprint module and the screen of the electronic device after the screen is attached is much different from the acoustic impedance of the air, so that the installation cavity will form a barrier. The hollow installation cavity has a barrier function to block signal transmission, and the sound waves will not be transmitted and dissipated by the support member. In this way, the signal loss can be reduced, and the recognition accuracy and sensitivity of the fingerprint module can be ensured.

[0009] It can be seen that by reasonably setting the matching structure of the ultrasonic fingerprint recognition part, the piezoelectric part and the support, while protecting the piezoelectric part to prevent the piezoelectric part from being damaged by the frame, the recognition accuracy and sensitivity of the fingerprint module can be guaranteed, thereby improving the product's performance and market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A partial structural schematic diagram of an electronic device provided by a first embodiment of the present application is shown;

[0011] Figure 2 An exploded view showing a partial structure of an electronic device provided by a first embodiment of the present application;

[0012] Figure 3 An exploded view of a part of the structure of a fingerprint module provided by the first embodiment of the present application is shown;

[0013] Figure 4 An exploded view of a fingerprint module provided by the first embodiment of the present application is shown;

[0014] Figure 5 An exploded view of a part of the structure of a fingerprint module provided in a second embodiment of the present application is shown;

[0015] Figure 6 A schematic diagram of the structure of a fingerprint module provided in the first embodiment of the present application is shown;

[0016] Figure 7 A partial structural schematic diagram of a fingerprint module provided in the first embodiment of the present application is shown;

[0017] Figure 8 A schematic structural diagram of a support member provided in a first embodiment of the present application is shown;

[0018] Fig. 9 A schematic structural diagram of a support member provided in a second embodiment of the present application is shown.

[0019] in, Figures 1 to 9 The corresponding relationship between the reference numerals and the component names is as follows:

[0020] 10 fingerprint module, 100 ultrasonic fingerprint recognition part, 200 piezoelectric part, 210 functional area, 220 wiring area, 300 support member, 310 support plate, 320 first bonding part, 322 flow outlet, 330 supporting protrusion, 332 end surface, 340 elastic part, 400 installation cavity, 500 second bonding part, 600 flexible circuit board, 70 electronic device, 700 frame, 800 screen. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] The following is combined with Figures 1 to 9 The fingerprint module 10 and the electronic device 70 provided in the embodiments of the present application are described.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, a fingerprint module 10 is provided, including: an ultrasonic fingerprint recognition unit 100; a piezoelectric unit 200; a support member 300, wherein the piezoelectric unit 200 is located between the ultrasonic fingerprint recognition unit 100 and the support member 300, and the support member 300 is used for installing and positioning the piezoelectric unit 200, and the support member 300 includes a support plate 310 and a first adhesive portion 320, and the first adhesive portion 320 is connected between the support plate 310 and the piezoelectric unit 200, and the piezoelectric unit 200, the support plate 310 and the first adhesive portion 320 enclose a hollow installation cavity 400.

[0025] In the embodiment of the present application, the fingerprint module 10 includes an ultrasonic fingerprint recognition unit 100 , a piezoelectric unit 200 and a support member 300 .

[0026] The piezoelectric part 200 is located between the ultrasonic fingerprint recognition part 100 and the support member 300, and the support member 300 is used for the installation and positioning of the piezoelectric part 200. That is to say, after the fingerprint module 10 is assembled in the electronic device 70, the ultrasonic fingerprint recognition part 100 is arranged opposite to the screen 800 of the electronic device 70, and the support member 300 of the fingerprint module 10 is arranged opposite to the frame of the electronic device 70, and the support member 300 is supported between the piezoelectric part 200 and the frame 700. In this way, under the action of external force, when the fingerprint module 10 moves toward the frame 700 due to the weakening of the rigidity of the screen 800, the support member 300 will abut between the frame 700 and the piezoelectric part 200, and the piezoelectric part 200 will not directly contact the frame 700. In this way, it is possible to avoid the situation where the frame damages the piezoelectric part 200 and the ultrasonic fingerprint recognition part 100 due to the collision with the electronic device 70, and provide structural support to ensure the use function of the fingerprint module 10.

[0027] Furthermore, the support member 300 includes a support plate 310 and a first adhesive portion 320, the support plate 310 and the piezoelectric portion 200 are arranged at intervals, and the first adhesive portion 320 is connected between the support plate 310 and the piezoelectric portion 200. The piezoelectric portion 200, the support plate 310 and the first adhesive portion 320 enclose a hollow mounting cavity 400. The mounting cavity 400 is filled with air, and the acoustic impedance of the material after the fingerprint module 10 and the screen 800 of the electronic device 70 are attached to the screen is much different from the acoustic impedance of the air, so that the mounting cavity 400 will form a barrier. The hollow mounting cavity 400 has a barrier function to block signal transmission, and the sound waves will not be transmitted and dissipated by the support member 300. In this way, the signal loss can be reduced, and the recognition accuracy and sensitivity of the fingerprint module 10 can be ensured.

[0028] It can be seen from this that by reasonably setting the matching structure of the ultrasonic fingerprint recognition part 100, the piezoelectric part 200 and the support part 300, while protecting the piezoelectric part 200 to prevent the piezoelectric part 200 from being damaged by the frame 700, the recognition accuracy and sensitivity of the fingerprint module 10 can be guaranteed, thereby improving the product's performance and market competitiveness.

[0029] in, Figure 1 The arrow in indicates the direction in which the external force acts on the fingerprint module 10.

[0030] Optionally, the support plate 310 includes a glass plate and / or a metal plate.

[0031] In some embodiments of the present application, Figure 4 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, the support member 300 further includes: a support protrusion 330 , which is located in the installation cavity 400 , and the support protrusion 330 is connected to the support plate 310 .

[0032] In the embodiment of the present application, the structure of the support member 300 is further defined, so that the support member 300 further includes a support protrusion 330, the support protrusion 330 is located in the installation cavity 400, and the support protrusion 330 is connected to the support plate 310. It can be understood that the support protrusion 330 is arranged opposite to the piezoelectric part 200.

[0033] When external force acts on the fingerprint module 10, the ultrasonic fingerprint recognition unit 100 and the piezoelectric unit 200 move toward the frame 700 due to the weakening of the rigidity of the screen 800. The supporting protrusion 330 has the function of supporting the piezoelectric unit 200 and the ultrasonic fingerprint recognition unit 100, hindering the piezoelectric unit 200 and the ultrasonic fingerprint recognition unit 100 from further deformation, which is beneficial to reducing the deformation amount of the piezoelectric unit 200 and the ultrasonic fingerprint recognition unit 100, and further helps to reduce the probability of damage of the piezoelectric unit 200 and the ultrasonic fingerprint recognition unit 100, which is beneficial to prolonging the service life of the piezoelectric unit 200 and the ultrasonic fingerprint recognition unit 100.

[0034] In some embodiments of the present application, there are multiple supporting protrusions 330 , and the multiple supporting protrusions 330 are arranged at intervals.

[0035] In the embodiment of the present application, the number and setting positions of the supporting protrusions 330 are further limited.

[0036] Specifically, there are a plurality of supporting protrusions 330 . The plurality of supporting protrusions 330 are arranged at intervals. Each supporting protrusion 330 is connected to the supporting plate 310 , and each supporting protrusion 330 is disposed opposite to the piezoelectric part 200 .

[0037] This arrangement allows the supporting protrusion 330 to support the piezoelectric part 200 from multiple directions and multiple angles, thereby ensuring the balance and consistency of forces at different positions of the piezoelectric part 200, ensuring the balance of deformation of the piezoelectric part 200, and avoiding the piezoelectric part 200 from being damaged due to excessive local deformation, which is beneficial to ensuring the service life of the piezoelectric part 200.

[0038] In some embodiments of the present application, the supporting protrusion 330 abuts against the piezoelectric portion 200 ; or the supporting protrusion 330 and the piezoelectric portion 200 are arranged at an interval.

[0039] In the embodiment of the present application, the matching structure between the supporting protrusion 330 and the piezoelectric part 200 is further defined.

[0040] Specifically, the supporting protrusion 330 abuts against the piezoelectric portion 200 .

[0041] Specifically, the supporting protrusion 330 is spaced apart from the piezoelectric portion 200, that is, there is a gap between the supporting protrusion 330 and the piezoelectric portion 200. The piezoelectric portion 200 will contact the supporting protrusion 330 only when the deformation amount reaches a preset value.

[0042] In some embodiments of the present application, the end surface 332 of the supporting protrusion 330 facing the piezoelectric part 200 is an arc-shaped surface.

[0043] In the embodiment of the present application, the structure of the supporting protrusion 330 is further limited.

[0044] Specifically, the end surface 332 of the support protrusion 330 facing the piezoelectric part 200 is an arc-shaped surface, that is, the end surface 332 of the support protrusion 330 facing the piezoelectric part 200 is smoothly transitioned, and when the support protrusion 330 contacts the piezoelectric part 200, scratching the piezoelectric part 200 can be avoided. In other words, while effectively supporting the piezoelectric part 200, damage to the piezoelectric part 200 can be avoided, thereby providing structural support for the effective operation of the fingerprint module 10.

[0045] In some embodiments of the present application, the supporting protrusion 330 is an insulating member.

[0046] In the embodiment of the present application, the structure of the supporting protrusion 330 is further limited.

[0047] Specifically, the support protrusion 330 is an insulating member. While ensuring that the support protrusion 330 can effectively support the piezoelectric part 200, it prevents the acoustic wave signal from being transmitted and diverged through the support protrusion 330, which has little effect on the fingerprint recognition performance and can ensure the detection effectiveness and detection accuracy of the fingerprint module 10.

[0048] In some embodiments of the present application, Figure 2 As shown, the piezoelectric part 200 includes a functional area 210 and a wiring area 220 , the first bonding part 320 is connected to the wiring area 220 , and / or the supporting protrusion 330 is arranged opposite to the functional area 210 .

[0049] In the embodiment of the present application, the positional relationship between the piezoelectric portion 200 and the first adhesive portion 320 is further limited.

[0050] Specifically, the piezoelectric part 200 includes a functional area 210 and a wiring area 220, and the first bonding part 320 is connected to the wiring area 220. That is, the first bonding part 320 is located on one side of the functional area 210. The existing structure of the piezoelectric part 200 is reasonably utilized, so that the first bonding part 320 is arranged opposite to and connected to the wiring area 220, and the first bonding part 320 does not affect the performance of the functional area 210 of the piezoelectric part 200.

[0051] In this embodiment, the routing area 220 is located at the peripheral side of the functional area 210 , and the routing area 220 is disposed around the functional area 210 .

[0052] In the embodiment of the present application, the positional relationship between the piezoelectric portion 200 and the supporting protrusion 330 is further limited.

[0053] Specifically, the piezoelectric part 200 includes a functional area 210 and a wiring area 220, and the support protrusion 330 is arranged opposite to the functional area 210. When the piezoelectric part 200 abuts against the support protrusion 330, the support protrusion 330 abuts against the functional area 210, and the support protrusion 330 does not damage the wiring of the wiring area 220.

[0054] Optionally, the supporting protrusion 330 is a flexible member, such as a plastic protrusion, such as a foam, such as a rubber protrusion.

[0055] Optionally, the supporting protrusion 330 is a rigid member whose shape cannot be changed.

[0056] Alternatively, if Figure 8 and Fig. 9 As shown, the first adhesive portion 320 is located at the edge of the support plate 310, and the first adhesive portion 320 is a ring-shaped structure.

[0057] This arrangement increases the matching area and matching angle between the first adhesive portion 320 and the piezoelectric portion 200 while ensuring the effectiveness and feasibility of forming the mounting cavity 400 , so that the piezoelectric portion 200 and the support plate 310 are effectively assembled together.

[0058] In some embodiments of the present application, Fig. 9 As shown, the first bonding portion 320 is provided with a flow opening 322 , and the flow opening 322 is connected to the installation cavity 400 .

[0059] In the embodiment of the present application, the structure of the first adhesive portion 320 is further limited so that the first adhesive portion 320 is provided with a flow port 322 , and the flow port 322 is connected to the installation cavity 400 .

[0060] The flow port 322 has the function of connecting the installation cavity 400 and the external environment. That is, the flow port 322 has the function of an exhaust groove. This arrangement can avoid the occurrence of poor manufacturing performance during the processing of the fingerprint module 10. For example, avoid the formation of bulges. For example, avoid the formation of depressions. It is beneficial to improve the yield rate of the fingerprint module 10. In addition, due to the existence of the flow port 322, the installation cavity 400 enclosed by the support plate 310, the first adhesive portion 320 and the piezoelectric portion 200 also has the function of mitigating external force impact, which can effectively protect the ultrasonic fingerprint recognition portion 100 and the piezoelectric portion 200, and is beneficial to extending the service life of the fingerprint module 10.

[0061] Optionally, the number of the flow opening 322 is one. Optionally, the number of the flow opening 322 is multiple, and the multiple flow openings 322 are arranged at intervals.

[0062] In some embodiments of the present application, Figure 5 As shown, the support member 300 further includes an elastic portion 340 disposed on a side of the support plate 310 away from the piezoelectric portion 200 .

[0063] In the embodiment of the present application, the structure of the support member 300 is further limited.

[0064] Specifically, the support member 300 further includes an elastic portion 340, which is disposed on a side of the support plate 310 away from the piezoelectric portion 200. When the support member 300 contacts the frame 700 of the electronic device 70, the elastic portion 340 has the function of buffering the force of the support member 300 acting on the frame 700, thereby avoiding abnormal noise and reducing damage to the frame and the piezoelectric portion 200.

[0065] Optionally, the elastic portion 340 includes foam, sponge, silicone, etc., which are not listed here one by one.

[0066] In some embodiments of the present application, Figures 2 to 7 As shown, the fingerprint module 10 also includes: a second adhesive portion 500, which is arranged on the side of the ultrasonic fingerprint recognition unit 100 away from the piezoelectric unit 200, and the second adhesive portion 500 is used for installing and positioning the ultrasonic fingerprint recognition unit 100; a flexible circuit board 600, the flexible circuit board 600 and the piezoelectric unit 200 are located on the same side of the ultrasonic fingerprint recognition unit 100, and the flexible circuit board 600 and the piezoelectric unit 200 are arranged at an interval.

[0067] In the embodiment of the present application, the structure of the fingerprint module 10 is further limited.

[0068] The fingerprint module 10 further includes a second adhesive portion 500 and a flexible circuit board 600 .

[0069] The second adhesive portion 500 is disposed on a side of the ultrasonic fingerprint recognition unit 100 away from the piezoelectric unit 200 , and the second adhesive portion 500 is connected to the screen 800 of the electronic device 70 . The ultrasonic fingerprint recognition unit 100 and the screen 800 are connected via the second adhesive portion 500 .

[0070] The flexible circuit board 600 and the piezoelectric part 200 are located on the same side of the ultrasonic fingerprint recognition part 100 , the flexible circuit board 600 is electrically connected to the ultrasonic fingerprint recognition part 100 , and the piezoelectric part 200 is electrically connected to the ultrasonic fingerprint recognition part 100 . The ultrasonic fingerprint recognition part 100 and the screen 800 are connected via the second adhesive part 500 .

[0071] like Figure 1 and Figure 2As shown, in some embodiments of the present application, an electronic device 70 is provided, comprising: a frame 700; a screen 800 connected to the frame 700; and a fingerprint module 10 of any of the above embodiments, wherein the second adhesive portion 500 of the fingerprint module 10 is connected to the screen 800, and the support member 300 is arranged relative to the frame 700.

[0072] The electronic device 70 provided in the present application includes the fingerprint module 10 of any of the above embodiments, and therefore has all the beneficial effects of the above fingerprint module 10, which will not be described one by one here.

[0073] Optionally, the electronic device 70 can be a mobile terminal such as a mobile phone, a wearable device, a tablet computer, a laptop computer, a mobile computer, an augmented reality device (also known as an AR (Augmented Reality) device), a virtual reality device (also known as a VR (Virtual Reality) device) and a handheld game console, etc.

[0074] In some embodiments of the present application, the elastic portion 340 of the fingerprint module 10 abuts against the frame 700 .

[0075] In the embodiment of the present application, the matching structure of the fingerprint module 10 and the frame 700 is further limited.

[0076] Specifically, the elastic part 340 of the fingerprint module 10 is disposed on the side of the support plate 310 away from the piezoelectric part 200, and the elastic part 340 abuts against the frame 700. When the support member 300 contacts the frame 700 of the electronic device 70, the elastic part 340 has the function of buffering the force of the support member 300 acting on the frame 700, avoiding abnormal noise, and reducing damage to the frame and the piezoelectric part 200.

[0077] In some embodiments of the present application, the support plate 310 abuts against the frame 700 .

[0078] In the embodiment of the present application, the matching structure of the fingerprint module 10 and the frame 700 is further limited.

[0079] Specifically, the support plate 310 abuts against the frame 700. That is, when the support member 300 does not include the elastic portion 340, the support plate 310 abuts against the frame 700. This arrangement increases the contact area between the support plate 310 and the frame 700, so that the support member 300 and the frame 700 are in surface contact, so that the force of the fingerprint module 10 acting on the frame 700 can be evenly distributed, local deformation of the frame 700 can be avoided, and the effectiveness and feasibility of fingerprint recognition of the electronic device 70 can be ensured.

[0080] In some embodiments of the present application, the support member 300 and the frame 700 are arranged at an interval.

[0081] In the embodiment of the present application, the matching structure of the fingerprint module 10 and the frame 700 is further limited.

[0082] Specifically, the support member 300 is spaced apart from the frame 700. That is, when the fingerprint module 10 moves toward the frame 700 under the action of external force, the support plate 310 or the elastic part 340 of the support member 300 can abut against the frame.

[0083] Optionally, the fingerprint module 10 of the present application can solve the reliability and performance problems of fingerprint recognition caused by insufficient rigidity of the screen 800 or insufficient protection of the whole device due to under-screen ultrasonic fingerprint.

[0084] After the fingerprint module 10 of the present application is assembled in the whole machine, a support member 300 can be arbitrarily added to the back of the piezoelectric part 200 without affecting the use of the fingerprint.

[0085] The fingerprint module 10 of the present application is additionally designed with a support member 300 on one side of the piezoelectric circuit layer (i.e., the piezoelectric part 200). The support member 300 includes a plurality of spaced support protrusions 330, a support plate 310 and a first bonding portion 320 (e.g., adhesive). The first bonding portion 320 is located around the support plate 310, and the support member 300 is attached to the non-functional area 210 (e.g., the routing area 220) of the piezoelectric part 200.

[0086] The support member 300 includes a support protrusion 330 and a glue frame (i.e., the first adhesive portion 320). The support protrusion 330 can be realized by printing, etching, and the like, and the glue frame can be realized by silk-screen printing or bonding solid double-sided adhesive. The material of the support protrusion 330 can be selected from materials with poor sound wave transmission, and the material can be evaluated according to actual needs;

[0087] The first bonding portion 320 of the support member 300 is provided with an exhaust groove (ie, the flow port 322 ), which can ensure that no manufacturing defects occur during the processing, and avoid defects such as bulging and adsorption.

[0088] The support member 300 is attached to the non-functional area 210 (eg, the wiring area 220 ) of the piezoelectric part 200 , and an entire air frame (ie, the installation cavity 400 of the central control) is formed between the support member 300 and the piezoelectric part 200 .

[0089] The support plate 310 of the support member 300 includes but is not limited to a glass plate, and may also be a stainless steel plate, an aluminum plate, etc., which are not listed here one by one.

[0090] The fingerprint module 10 of the present application includes a support member 300, which can ensure point contact between the fingerprint functional area 210 and the support protrusion 330 of the support member 300. The area other than the point contact is an air layer, which has very little effect on the fingerprint performance.

[0091] The fingerprint module 10 of the present application can make the fingerprint module 10 directly contact with the frame 700 when the screen 800 has weak rigidity and the fingerprint is sunken when used, thereby enhancing the strength without affecting the fingerprint recognition performance.

[0092] The fingerprint module 10 of the present application can improve the reliability of fingerprint recognition and avoid the problem of fingerprint function failure caused by hardware damage of the fingerprint module 10.

[0093] The working principle of the fingerprint module 10 is: the piezoelectric circuit layer (i.e., the piezoelectric part 200) is driven by electricity to vibrate, and ultrasonic waves are generated after the vibration. The piezoelectric circuit layer is not directional, but the front and back sides of the fingerprint module 10 can make sounds. The transmission of sound waves requires a medium. The acoustic resistance of the air is larger than the material after the fingerprint module 10 is attached to the screen, so that a barrier will be formed, similar to the light hitting the mirror and reflecting back, so that the sound waves form a phenomenon similar to unidirectional sound. The piezoelectric part 200 of the fingerprint module 10 is located at the bottom of the ultrasonic fingerprint recognition part 100, and the piezoelectric part 200 is not attached to the screen 800. If an external force acts on the fingerprint module 10 so that the piezoelectric part 200 contacts the frame 700 of the electronic device 70, etc., it will transmit sound waves and reduce the detection ability of the fingerprint module 10. The present application sets a support member 300, which can isolate the piezoelectric part 200 from the frame 700 to avoid large-area contact between the piezoelectric part 200 and the frame 700. When the application strength of the whole machine is relatively low, the support member 300 can be used to strengthen the structural strength of the whole machine, protect the ultrasonic fingerprint recognition unit 100 and the piezoelectric part 200, and avoid fingerprint signal loss.

[0094] The air layer (the hollow mounting cavity 400 enclosed by the support plate 310, the first bonding portion 320 and the piezoelectric portion 200) acts as a signal transmission barrier. The support plate 310 can be a glass plate or a metal plate, etc. The function of the support plate 310 is to enhance the structural strength.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0096] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fingerprint module, characterized in that: include: Ultrasonic fingerprint recognition unit; Piezoelectric part; The piezoelectric part is located between the ultrasonic fingerprint recognition part and the support part, and the support part is used for installing and positioning the piezoelectric part. The support part includes a support plate and a first adhesive part, and the first adhesive part is connected between the support plate and the piezoelectric part. The piezoelectric part, the support plate and the first adhesive part enclose a hollow installation cavity.

2. The fingerprint module according to claim 1, characterized in that: The support member also includes: The supporting protrusion is located in the mounting cavity, and the supporting protrusion is connected to the supporting plate.

3. The fingerprint module according to claim 2, characterized in that: The number of the supporting protrusions is plural, and the plurality of supporting protrusions are arranged at intervals.

4. The fingerprint module according to claim 2 or 3, characterized in that: The supporting protrusion abuts against the piezoelectric portion; or The supporting protrusion is spaced apart from the piezoelectric portion.

5. The fingerprint module according to claim 2 or 3, characterized in that: The end surface of the supporting protrusion facing the piezoelectric part is an arc-shaped surface; and / or The supporting protrusion is an insulating member.

6. The fingerprint module according to claim 2 or 3, characterized in that: The piezoelectric portion includes a functional area and a wiring area, the first bonding portion is connected to the wiring area, and / or the supporting protrusion is arranged opposite to the functional area.

7. The fingerprint module according to any one of claims 1 to 3, characterized in that: The first bonding portion is provided with a flow opening, and the flow opening is connected to the installation cavity.

8. The fingerprint module according to any one of claims 1 to 3, characterized in that: The support member also includes: The elastic part is arranged on a side of the support plate away from the piezoelectric part.

9. The fingerprint module according to any one of claims 1 to 3, characterized in that: Also includes: A second bonding portion is provided on a side of the ultrasonic fingerprint recognition portion away from the piezoelectric portion, and the second bonding portion is used for mounting and positioning the ultrasonic fingerprint recognition portion; A flexible circuit board is provided, wherein the flexible circuit board and the piezoelectric part are located on the same side of the ultrasonic fingerprint recognition part, and the flexible circuit board and the piezoelectric part are arranged at an interval.

10. An electronic device, characterized in that: include: Frame; A screen connected to the frame; and According to any one of claims 1 to 9, the second bonding portion of the fingerprint module is connected to the screen, and the support member is arranged opposite to the frame.

11. The electronic device according to claim 10, characterized in that: The elastic part of the fingerprint module abuts against the frame, or the support plate abuts against the frame; or The support member is spaced apart from the frame.

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