CN115439895A - Fingerprint pressure-sensitive module and electronic equipment - Google Patents

Fingerprint pressure-sensitive module and electronic equipment Download PDF

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Publication number
CN115439895A
CN115439895A CN202211131084.3A CN202211131084A CN115439895A CN 115439895 A CN115439895 A CN 115439895A CN 202211131084 A CN202211131084 A CN 202211131084A CN 115439895 A CN115439895 A CN 115439895A
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screen
fingerprint
pressure sensing
pressure
fixedly connected
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CN202211131084.3A
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Inventor
贺逸凡
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN202211131084.3A priority Critical patent/CN115439895A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12Fingerprints or palmprints
    • G06V40/13Sensors therefor

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)

Abstract

The invention provides a fingerprint pressure-sensitive module and electronic equipment, and belongs to the technical field of electronic equipment design, wherein the fingerprint pressure-sensitive module comprises a screen, a base, an elastic piece, a fingerprint acquisition device and at least one pressure-sensitive component; the screen and the base are arranged oppositely, the elastic piece is fixedly connected with the screen and the base respectively, and a deformation space is formed between the screen and the base; the fingerprint acquisition device is arranged in the deformation space and is fixedly connected with the screen, and the fingerprint acquisition device is used for acquiring fingerprint information on the screen; the fingerprint collection device with form the pressure channel between the elastic component, the pressure subassembly set up in the pressure channel for detect the dynamics size of the press operation that the screen received.

Description

Fingerprint pressure-sensitive module and electronic equipment
Technical Field
The invention relates to the technical field of electronic equipment design, in particular to a fingerprint pressure sensing module and electronic equipment.
Background
Along with the rapid development of electronic technology, electronic equipment pays more attention to user's use experience on the basis of satisfying the practicality, touch screen button, fingerprint unblock, face identification etc. become electronic equipment's basic function thereupon, and for this reason, electronic equipment usually need inlay under display panel and establish fingerprint identification subassembly and forced induction subassembly to make electronic equipment possess fingerprint identification function and screen button function down.
However, the fingerprint identification function and the off-screen key function in the existing electronic device are usually designed independently, and the detection of the key pressure cannot be performed while the fingerprint identification is performed, so that a user needs to perform a fingerprint operation or a key operation separately, and the use experience of the user is affected.
Disclosure of Invention
The embodiment of the invention provides a fingerprint pressure-sensitive module and electronic equipment, and aims to solve the problem that the existing electronic equipment cannot synchronously execute fingerprint identification and key detection.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a fingerprint pressure sensing module, which includes a screen, a base, an elastic member, a fingerprint acquisition device, and at least one pressure sensing assembly;
the screen and the base are arranged oppositely, the elastic piece is fixedly connected with the screen and the base respectively, and a deformation space is formed between the screen and the base;
the fingerprint acquisition device is arranged in the deformation space and is fixedly connected with the screen, and the fingerprint acquisition device is used for acquiring fingerprint information on the screen;
the fingerprint collection device with form the pressure channel between the elastic component, the pressure subassembly set up in the pressure channel for detect the dynamics size of the press operation that the screen received.
Optionally, the fingerprint pressure sensing module further comprises a mounting plate; the mounting panel set up in the deformation space, and with screen fixed connection, the fingerprint collection device install in on the mounting panel.
Optionally, the projection of the mounting plate is located in a central region of the deformation space in a direction perpendicular to the screen.
Optionally, the pressure sensing component comprises a variable resistor; one end of the variable resistor is fixedly connected with the screen, the other end of the variable resistor is fixedly connected with the mounting plate, and the resistance value of the variable resistor changes along with the pressing operation.
Optionally, the pressure sensing assembly further comprises a fixed resistor, and the fixed resistor is fixedly connected with the mounting plate; the variable resistor is electrically connected with the fixed resistor to form a Wheatstone bridge.
Optionally, a projection of the variable resistance is larger than a projection of the fixed resistance in a direction perpendicular to the screen.
Optionally, the pressure sensing assembly comprises a first polar plate, a second polar plate and a substrate;
the first polar plate and the second polar plate are connected with the mounting plate in a sliding mode, and the substrate is fixedly connected with one side, far away from the mounting plate, of the fingerprint acquisition device;
along the direction perpendicular to the screen, at least part of the projection of the first polar plate is positioned outside the substrate, and the projection of the second polar plate is positioned inside the substrate.
Optionally, the pressure-sensing assembly further comprises a push rod; one end of the push rod is fixedly connected with the screen, and the other end of the push rod is fixedly connected with the first polar plate.
Optionally, the elastic member is foam.
In a second aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes the fingerprint pressure sensing module described in any one of the foregoing descriptions, the screen forms a display screen of the electronic device, and the base forms a middle frame of the electronic device.
Compared with the prior art, the fingerprint pressure sensing module and the electronic equipment provided by the embodiment of the invention have the following advantages:
the fingerprint pressure-sensitive module provided by the embodiment of the invention collects fingerprint information on the screen through the collecting device, realizes the function of screen fingerprint identification, detects the pressing operation on the screen through the pressure-sensitive component, realizes the function of screen key detection, synchronously executes the fingerprint identification and key detection of the screen, simplifies the operation mode of a user, and improves the use experience of the user. Meanwhile, the pressure sensing assembly is located on the periphery of the fingerprint acquisition device, so that the idle space under the screen is fully utilized, and the effective utilization rate of the space under the screen is improved.
Compared with the prior art, the electronic device provided by the embodiment of the invention and the fingerprint pressure sensing module have the same advantages, and are not described again.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic diagram of a fingerprint pressure sensing module according to an embodiment of the present invention before being pressed;
fig. 2 is a schematic diagram illustrating a fingerprint pressure sensing module according to an embodiment of the present invention after being pressed;
FIG. 3 is a schematic diagram of another embodiment of a fingerprint pressure sensor module according to the present invention before pressing;
fig. 4 is a schematic diagram illustrating another embodiment of a fingerprint pressure sensing module according to the present invention after being pressed;
fig. 5 shows a schematic diagram of an electronic device according to an embodiment of the invention.
1-screen, 2-base, 3-elastic piece, 4-fingerprint acquisition device, 51-variable resistor, 52-fixed resistor, 53-first polar plate, second polar plate, 54-base plate, 55-push rod, 6-mounting plate, 7-fingerprint acquisition area and 8-pressure channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1 and 2, the present invention provides a fingerprint pressure sensing module, which includes a screen 1, a base 2, an elastic member 3, a fingerprint collecting device 4, and at least one pressure sensing assembly; the screen 1 and the base 2 are arranged oppositely, the elastic part 3 is respectively and fixedly connected with the screen 1 and the base 2, and a deformation space is formed between the screen 1 and the base 2; the fingerprint acquisition device 4 is arranged in the deformation space and is fixedly connected with the screen 1, and the fingerprint acquisition device 4 is used for acquiring fingerprint information on the screen 1; fingerprint collection device 4 with form the pressure channel between the elastic component 3, the pressure subassembly set up in the pressure channel, be used for detecting the dynamics size of the pressing operation that screen 1 received.
Particularly, fingerprint pressure is felt the module and is included screen 1, base 2, elastic component 3, fingerprint collection device 4 and at least one pressure is felt the subassembly, screen 1 is flexible electronic screen, the user presses the operation on screen 1, as shown by the arrow in fig. 2, press the operation and can make screen 1 take place the deformation of certain degree, screen 1 sets up with base 2 relatively, elastic component 3 sets up between screen 1 and base 2, its one end and 1 fixed connection of screen, the other end and 2 fixed connection of base, form deformation space between screen 1 and base 2. The elastic member 3 can be a rubber pad, a silica gel pad, an emulsion pad, a foam pad and the like, has better elastic deformation capability, and makes the screen 1 restore to the original shape by utilizing the elastic characteristic after the screen 1 deforms so as to receive the next pressing operation. Preferably, the elastic component 3 selects the foam pad, and the foam pad is light in weight, heat-resistant, corrosion-resistant, the dependable performance, connects between screen 1 and base 2, on the basis of guaranteeing the deformability, can also alleviate the whole weight of fingerprint pressure sense module. Fingerprint collection device 4 sets up in the deformation space, with screen 1 fixed connection, can gather the fingerprint information of user's last user input of screen 1, for realizing the comprehensive collection of each regional fingerprint information on screen 1, can set up fingerprint collection device 4 under screen 1 center. A pressure-sensitive channel is formed between the fingerprint acquisition device 4 and the elastic part 3, a pressure-sensitive component is arranged in the pressure-sensitive channel, and the pressure-sensitive component can detect the force of pressing operation on the screen 1, so that the key function on the screen 1 is realized.
The fingerprint pressure of this embodiment is felt module, carries out the collection of fingerprint information on the screen through gathering the device, realizes screen fingerprint identification function, carries out the detection of pressing down the operation on the screen through the pressure subassembly, realizes screen button detection function, and the fingerprint identification and the button of screen detect synchronous execution, have simplified user's operation, have promoted user's use and have experienced. Meanwhile, the pressure sensing assembly is located at the periphery of the fingerprint acquisition device, so that the idle space under the screen is fully utilized, and the effective utilization rate of the space under the screen is improved.
Optionally, referring to fig. 1 and fig. 2, in an embodiment of the present invention, the fingerprint pressure sensing module further includes a mounting plate 6; mounting panel 6 set up in the deformation space, and with screen 1 fixed connection, fingerprint collection device 4 install in on the mounting panel 6.
Particularly, mounting panel 6 sets up in the deformation space, with screen 1 fixed connection, fingerprint collection device 4 installs on mounting panel 6, and mounting panel 6 can provide a prepositioning for fingerprint collection device 4, is convenient for fix a position fingerprint collection device 4's mounted position fast. The mounting plate 6 may be made of a conductive material to facilitate the collection of fingerprint information by the fingerprint collection device 4. Preferably, the mounting plate 6 can be a copper plate, has good flexibility on the basis of electric conduction, is convenient for the screen 1 to deform, and meanwhile, has low cost and is beneficial to the control of the whole cost.
Alternatively, referring to fig. 1 and 2, in the embodiment of the present invention, the projection of the mounting plate 6 is located in the central region of the deformation space in the direction perpendicular to the screen 1.
Particularly, along the direction of perpendicular to screen 1, the projection of mounting panel 6 is located the central area in deformation space, is equivalent to fingerprint collection device 4 and is located the central point of screen 1, and the central point is equal with each regional distance of screen 1 for the fingerprint information that fingerprint collection device 4 gathered is more accurate, thereby improves the accuracy of screen 1 fingerprint identification function.
Optionally, referring to fig. 1 and fig. 2, in the embodiment of the present invention, the pressure sensing component includes a variable resistor 51; one end of the variable resistor 51 is fixedly connected with the screen 1, the other end of the variable resistor 51 is fixedly connected with the mounting plate 6, and the resistance value of the variable resistor 51 changes along with the pressing operation.
Specifically, in one embodiment, a resistance type detection principle is adopted, the pressure sensing assembly includes a variable resistor 51, a resistance value of the variable resistor 51 changes due to a change of an external environment, one end of the variable resistor 51 is fixedly connected with the screen 1, and the other end of the variable resistor 51 is fixedly connected with the mounting plate 6, for example, the variable resistor 51 is a bending resistor with a shape structure that can change, when the screen 1 receives a pressing operation, the screen 1 deforms irregularly, the bending resistor is stretched or compressed, the shape structure of the bending resistor changes, the resistance value of the bending resistor changes, a detection result of the pressure sensing assembly changes, a part with larger pressing operation force is pressed, the deformation amount of the bending resistor is larger, and the resistance value changes correspondingly larger, so that the detection of the pressing operation force can be completed through a change of the detection result of the pressure sensing assembly.
Optionally, referring to fig. 1 and fig. 2, in the embodiment of the present invention, the pressure sensing assembly further includes a fixed resistor 52, and the fixed resistor 52 is fixedly connected to the mounting plate 6; the variable resistor 51 is electrically connected to the fixed resistor 52 to form a wheatstone bridge.
Specifically, the pressure sensing assembly further includes a fixed resistor 52, the resistance of the fixed resistor 52 does not change due to the change of the external environment, and the fixed resistor 52 is fixedly connected to the mounting plate 6. The fixed resistor 52 and the variable resistor 51 are respectively two, the four resistors are electrically connected to form a Wheatstone bridge, and the result of the pressing size is reflected on the Wheatstone bridge by using the difference value between the variable resistor 51 and the fixed resistor 52 before and after the pressing operation, so that the output result of the detection assembly is subjected to differential amplification, and the sensitivity of the pressure sensing module on the detection of the pressing operation is improved.
Optionally, referring to fig. 1 and fig. 2, in the embodiment of the present invention, along a direction perpendicular to the screen 1, a projection of the variable resistor 51 is larger than a projection of the fixed resistor 52.
Specifically, the projection of the variable resistor 51 is larger than the projection of the fixed resistor 52 along the direction perpendicular to the screen 1, so as to ensure that the variable resistor 51 can still deform to change the resistance value thereof under the condition that the pressing operation strength is large, so that the detection assembly has a large pressing operation strength detection range, and the accuracy of the detection result is ensured.
Alternatively, referring to fig. 3 and 4, in the embodiment of the present invention, the pressure sensing assembly includes a first plate, a second plate and a substrate 54; the first polar plate and the second polar plate are connected with the mounting plate 6 in a sliding manner, and the substrate 54 is fixedly connected with one side of the fingerprint acquisition device 4 away from the mounting plate 6; along a direction perpendicular to the screen 1, at least a part of the projection of the first plate is located outside the substrate 54, and the projection of the second plate is located inside the substrate 54.
Specifically, in another embodiment, the pressure sensing assembly employs a capacitive detection principle, and includes a first plate 53, a second plate 53 and a substrate 54, and it is noted that the consistent marking of the first plate and the second plate only represents that the positions of the first plate and the second plate are marked on fig. 3 and 4, and the first plate and the second plate are two different plates in nature. The first polar plate and the second polar plate are provided with electric charges, the first polar plate and the second polar plate are both connected with the mounting plate 6 in a sliding mode, the substrate 54 is fixedly connected with one side, away from the mounting plate 6, of the fingerprint acquisition device 4, the substrate 54 is also provided with electric charges, the first polar plate and the second polar plate are arranged opposite to the substrate 54, one capacitor is formed between the first polar plate and the substrate 54, and the other capacitor is formed between the second polar plate and the substrate 54.
When the screen 1 receives a pressing operation, as shown by an arrow in fig. 4, the mounting plate 6 moves, the fingerprint acquisition device 4 on the mounting plate 6 drives the substrate 54 to move synchronously with the mounting plate 6, and the first polar plate and the second polar plate slide relative to the mounting plate 6 under the action of self gravity, so that the first polar plate and the second polar plate move relative to the substrate 54. Along the direction perpendicular to the screen 1, at least part of the projection of the first polar plate is located outside the substrate 54, the projection of the second polar plate is located inside the substrate 54, during the process that the first polar plate and the second polar plate move relative to the substrate 54, the vertical projection area of the first substrate 54 inside the substrate 54 will change, and the vertical projection area of the second substrate 54 inside the substrate 54 will not change, so that the capacitance formed by the second polar plate and the substrate 54 is used as a reference capacitance, a differential signal is established, the magnitude of the pressing force is detected by using the capacitance variation, and if the capacitance variation is:
Figure BDA0003850257280000071
wherein, C1 represents the electric capacity that first polar plate and base plate 54 formed, C2 represents the electric capacity that second polar plate and base plate 54 formed, refer to electric capacity promptly, this embodiment detects with the help of referring to electric capacity, can avoid appearing pressing the inconsistent problem of back elasticity back-moulding degree, promote the sensitivity of pressure sense module, and simultaneously, the electric capacity detects the installation degree of difficulty of comparing in resistance detection and is lower, the personnel of being convenient for assemble, still can keep higher sensitivity reliability under the condition of pressing the operation many times, and life is longer.
Optionally, referring to fig. 3 and 4, in the embodiment of the present invention, the pressure-sensitive assembly further includes a push rod 55; one end of the push rod 55 is fixedly connected with the screen 1, and the other end is fixedly connected with the first polar plate.
Particularly, the pressure-sensitive component further comprises a push rod 55, one end of the push rod 55 is fixedly connected with the screen 1, the other end of the push rod 55 is fixedly connected with the first pole plate, when the screen 1 receives the pressing operation, the mounting plate 6 moves, the push rod 55 can push the first pole plate to slide relative to the mounting plate 6, the phenomenon that the first pole plate is clamped in the sliding process of the relative base plate 54 under the action of self gravity is avoided, the capacitance formed by the first pole plate and the base plate 54 is ensured to be variable, and the accuracy of capacitance detection is improved.
Referring to fig. 5, the present invention further provides an electronic device, where the electronic device includes any one of the fingerprint pressure sensing modules, the screen 1 forms a display screen of the electronic device, and the base 2 forms a middle frame of the electronic device.
Specifically, the electronic device provided by the embodiment of the invention comprises a mobile phone, a tablet personal computer and the like, wherein the fingerprint pressure sensing modules are embedded in the electronic device, in order to enable the electronic device to be used more smoothly, the number of the fingerprint pressure sensing modules in the electronic device can be multiple, the screens 1 of the fingerprint pressure sensing modules form a display screen of the electronic device, the display screen can receive fingerprints and pressing operations of a user on the electronic device, the bases 2 of the fingerprint pressure sensing modules form a middle frame of the electronic device, as shown in fig. 5, the fingerprint collecting device 4 is arranged right below a fingerprint collecting area 7 of the electronic device, and the pressure sensing module is arranged in a pressure sensing channel 8 of the electronic device, so that a fingerprint identification function and a key detection function of the electronic device are correspondingly realized. Of course, other electronic elements can be embedded in the middle frame to satisfy more functions of the electronic device. The electronic equipment of the embodiment can synchronously execute the fingerprint identification function and the key function of the screen 1, simplifies the operation mode of a user, and improves the use experience of the user.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A fingerprint pressure sensing module is characterized by comprising a screen, a base, an elastic piece, a fingerprint acquisition device and at least one pressure sensing assembly;
the screen and the base are oppositely arranged, the elastic piece is fixedly connected with the screen and the base respectively, and a deformation space is formed between the screen and the base;
the fingerprint acquisition device is arranged in the deformation space and is fixedly connected with the screen, and the fingerprint acquisition device is used for acquiring fingerprint information on the screen;
the fingerprint collection device with form the pressure channel between the elastic component, the pressure subassembly set up in the pressure channel for detect the dynamics size of the press operation that the screen received.
2. The fingerprint pressure module of claim 1, further comprising a mounting plate;
the mounting panel set up in the deformation space, and with screen fixed connection, the fingerprint collection device install in on the mounting panel.
3. The fingerprint pressure sensing module of claim 2, wherein the projection of the mounting plate is located in a central region of the deformation space in a direction perpendicular to the screen.
4. The fingerprint pressure sensing module of claim 2, wherein the pressure sensing component comprises a variable resistor;
one end of the variable resistor is fixedly connected with the screen, the other end of the variable resistor is fixedly connected with the mounting plate, and the resistance value of the variable resistor changes along with the pressing operation.
5. The fingerprint pressure sensing module of claim 4, wherein the pressure sensing assembly further comprises a fixed resistor, and the fixed resistor is fixedly connected with the mounting plate;
the variable resistor is electrically connected with the fixed resistor to form a Wheatstone bridge.
6. The fingerprint pressure sensing module of claim 5, wherein the projection of the variable resistor is larger than the projection of the fixed resistor in a direction perpendicular to the screen.
7. The fingerprint pressure sensing module of claim 2, wherein the pressure sensing assembly comprises a first plate, a second plate and a substrate;
the first polar plate and the second polar plate are connected with the mounting plate in a sliding manner, and the substrate is fixedly connected with one side of the fingerprint acquisition device, which is far away from the mounting plate;
along the direction perpendicular to the screen, at least part of the projection of the first polar plate is positioned outside the substrate, and the projection of the second polar plate is positioned inside the substrate.
8. The fingerprint pressure sensor module of claim 7, wherein the pressure sensor assembly further comprises a push rod;
one end of the push rod is fixedly connected with the screen, and the other end of the push rod is fixedly connected with the first polar plate.
9. The fingerprint pressure sensing module of claim 1, wherein the elastic member is foam.
10. An electronic device, characterized in that the electronic device comprises the fingerprint pressure sensing module of any one of claims 1 to 9, the screen forms a display screen of the electronic device, and the base forms a middle frame of the electronic device.
CN202211131084.3A 2022-09-16 2022-09-16 Fingerprint pressure-sensitive module and electronic equipment Pending CN115439895A (en)

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CN202211131084.3A CN115439895A (en) 2022-09-16 2022-09-16 Fingerprint pressure-sensitive module and electronic equipment

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024140385A1 (en) * 2022-12-26 2024-07-04 维沃移动通信有限公司 Fingerprint module and electronic device
WO2024160099A1 (en) * 2023-01-30 2024-08-08 维沃移动通信有限公司 Electronic device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024140385A1 (en) * 2022-12-26 2024-07-04 维沃移动通信有限公司 Fingerprint module and electronic device
WO2024160099A1 (en) * 2023-01-30 2024-08-08 维沃移动通信有限公司 Electronic device

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