Fingerprint pressure sensing module and electronic device

Abstract

The application provides a fingerprint pressure sensing module and electronic equipment, and belongs to the technical field of electronic equipment design. The fingerprint pressure sensing module comprises a screen, a base, an elastic member, a fingerprint collection device and at least one pressure sensing component. The screen and the base are oppositely arranged. The elastic member is fixedly connected with the screen and the base respectively, and a deformation space is formed between the screen and the base. The fingerprint collection device is arranged in the deformation space and fixedly connected with the screen. The fingerprint collection device is used for collecting fingerprint information on the screen. A pressure sensing channel is formed between the fingerprint collection device and the elastic member. The pressure sensing component is arranged in the pressure sensing channel and used for detecting the force of a pressing operation on the screen.

Description

Technical Field

[0001] This invention relates to the field of electronic device design technology, and in particular to a fingerprint pressure-sensitive module and electronic device. Background Technology

[0002] With the rapid development of electronic technology, electronic devices are paying more attention to user experience while still meeting practical needs. Touch screen buttons, fingerprint unlocking, and facial recognition have become basic functions of electronic devices. To this end, electronic devices usually need to embed fingerprint recognition components and pressure sensing components under the display panel to enable them to have fingerprint recognition and under-screen button functions.

[0003] However, in existing electronic devices, fingerprint recognition and under-display button functions are usually designed independently, making it impossible to detect button pressure while performing fingerprint recognition. This forces users to perform fingerprint operation or button operation separately, affecting the user experience. Summary of the Invention

[0004] This invention provides a fingerprint pressure-sensitive module and an electronic device to solve the problem that existing electronic devices cannot simultaneously perform fingerprint recognition and button detection.

[0005] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide a fingerprint pressure-sensitive module, including a screen, a base, an elastic element, a fingerprint acquisition device, and at least one pressure-sensitive component;

[0007] The screen and the base are disposed opposite to each other, and the elastic element is fixedly connected to the screen and the base respectively, forming a deformation space between the screen and the base;

[0008] The fingerprint acquisition device is disposed within the deformation space and is fixedly connected to the screen. The fingerprint acquisition device is used to acquire fingerprint information on the screen.

[0009] A pressure-sensitive channel is formed between the fingerprint acquisition device and the elastic element, and the pressure-sensitive component is disposed in the pressure-sensitive channel to detect the force of the pressing operation on the screen.

[0010] Optionally, the fingerprint pressure-sensitive module further includes a mounting plate; the mounting plate is disposed within the deformation space and fixedly connected to the screen, and the fingerprint acquisition device is mounted on the mounting plate.

[0011] Optionally, the projection of the mounting plate is located in the central region of the deformation space along a direction perpendicular to the screen.

[0012] Optionally, the pressure-sensitive component includes a variable resistor; one end of the variable resistor is fixedly connected to the screen, and the other end is fixedly connected to the mounting plate, and the resistance value of the variable resistor changes with the pressing operation.

[0013] Optionally, the pressure-sensitive component further includes a fixed resistor, which is fixedly connected to the mounting plate; the variable resistor is electrically connected to the fixed resistor to form a Wheatstone bridge.

[0014] Optionally, along a direction perpendicular to the screen, the projection of the variable resistor is greater than the projection of the fixed resistor.

[0015] Optionally, the pressure-sensitive component includes a first electrode plate, a second electrode plate, and a substrate;

[0016] The first electrode plate and the second electrode plate are slidably connected to the mounting plate, and the substrate is fixedly connected to the side of the fingerprint acquisition device away from the mounting plate;

[0017] Along a direction perpendicular to the screen, at least a portion of the projection of the first electrode plate is located outside the substrate, and the projection of the second electrode plate is located inside the substrate.

[0018] Optionally, the pressure-sensitive component further includes a push rod; one end of the push rod is fixedly connected to the screen, and the other end is fixedly connected to the first electrode plate.

[0019] Optionally, the elastic element is foam.

[0020] Secondly, embodiments of the present invention also provide an electronic device, the electronic device including the fingerprint pressure-sensitive module described in any of the preceding claims, the screen constituting the display screen of the electronic device, and the base constituting the mid-frame of the electronic device.

[0021] Compared with existing technologies, the fingerprint pressure-sensitive module and electronic device provided in this invention have the following advantages:

[0022] The fingerprint pressure-sensitive module provided in this embodiment of the invention collects fingerprint information on the screen through a data acquisition device to achieve screen fingerprint recognition. It also detects press operations on the screen through a pressure-sensitive component to achieve screen button detection. Fingerprint recognition and button detection are performed simultaneously, simplifying the user's operation and improving the user experience. Furthermore, the pressure-sensitive component is located around the fingerprint acquisition device, making full use of the unused space under the screen and improving the effective utilization rate of that space.

[0023] The electronic device provided in this embodiment of the invention has the same advantages as the aforementioned fingerprint pressure-sensitive module compared to the prior art, and will not be repeated here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram showing a fingerprint pressure-sensitive module before being pressed, according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram showing a fingerprint pressure-sensitive module after being pressed, according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram showing another fingerprint pressure-sensitive module before being pressed, according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram showing another fingerprint pressure-sensitive module after being pressed, according to an embodiment of the present invention.

[0029] Figure 5 A schematic diagram illustrating an electronic device according to an embodiment of the present invention.

[0030] 1-Screen, 2-Base, 3-Elastic element, 4-Fingerprint sensor, 51-Variable resistor, 52-Fixed resistor, 53-First electrode plate, second electrode plate, 54-Base plate, 55-Push rod, 6-Mounting plate, 7-Fingerprint sensor area, 8-Pressure-sensitive channel. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0033] See Figure 1 and Figure 2This invention provides a fingerprint pressure-sensitive module, including a screen 1, a base 2, an elastic element 3, a fingerprint acquisition device 4, and at least one pressure-sensitive component. The screen 1 and the base 2 are disposed opposite to each other. The elastic element 3 is fixedly connected to both the screen 1 and the base 2, forming a deformation space between the screen 1 and the base 2. The fingerprint acquisition device 4 is disposed within the deformation space and fixedly connected to the screen 1. The fingerprint acquisition device 4 is used to acquire fingerprint information on the screen 1. A pressure-sensitive channel is formed between the fingerprint acquisition device 4 and the elastic element 3. The pressure-sensitive component is disposed within the pressure-sensitive channel and is used to detect the magnitude of the pressure applied to the screen 1.

[0034] Specifically, the fingerprint pressure-sensitive module includes a screen 1, a base 2, an elastic element 3, a fingerprint acquisition device 4, and at least one pressure-sensitive component. The screen 1 is a flexible electronic screen, and the user performs a pressing operation on the screen 1, such as... Figure 2 As indicated by the arrow, pressing the screen 1 causes it to deform to a certain extent. The screen 1 and base 2 are positioned opposite each other. An elastic element 3 is located between the screen 1 and base 2, with one end fixedly connected to the screen 1 and the other end fixedly connected to the base 2, forming a deformation space between them. The elastic element 3 can be a rubber pad, silicone pad, latex pad, foam pad, etc., possessing good elastic deformation capabilities. After the screen 1 deforms, its elastic properties allow it to return to its initial shape to accept the next pressing operation. Preferably, the elastic element 3 is a foam pad, which is lightweight, heat- and pressure-resistant, corrosion-resistant, and reliable. Connected between the screen 1 and base 2, it ensures deformation performance while reducing the overall weight of the fingerprint pressure-sensitive module. The fingerprint acquisition device 4 is located within the deformation space and fixedly connected to the screen 1. It can collect the fingerprint information input by the user on the screen 1. To achieve comprehensive collection of fingerprint information from all areas of the screen 1, the fingerprint acquisition device 4 can be positioned directly below the center of the screen 1. A pressure-sensitive channel is formed between the fingerprint collection device 4 and the elastic element 3. A pressure-sensitive component is provided in the pressure-sensitive channel. The pressure-sensitive component can detect the force of the pressing operation on the screen 1 and realize the button function on the screen 1.

[0035] The fingerprint pressure-sensitive module in this embodiment collects fingerprint information on the screen through a data acquisition device to achieve screen fingerprint recognition. It also detects on-screen button presses through a pressure-sensitive component, enabling screen button detection. Fingerprint recognition and button detection are performed simultaneously, simplifying user operation and improving the user experience. Furthermore, the pressure-sensitive component is located around the fingerprint acquisition device, making full use of the unused space under the screen and improving its effective utilization rate.

[0036] Optionally, see Figure 1 and Figure 2In this embodiment of the invention, the fingerprint pressure sensing module further includes a mounting plate 6; the mounting plate 6 is disposed within the deformation space and is fixedly connected to the screen 1, and the fingerprint acquisition device 4 is mounted on the mounting plate 6.

[0037] Specifically, the mounting plate 6 is disposed within the deformation space and fixedly connected to the screen 1. The fingerprint acquisition device 4 is mounted on the mounting plate 6. The mounting plate 6 provides a pre-position for the fingerprint acquisition device 4, facilitating quick positioning of its installation location. The mounting plate 6 can be made of conductive material to facilitate fingerprint information acquisition by the fingerprint acquisition device 4. Preferably, the mounting plate 6 can be a copper plate, which, in addition to being conductive, possesses good flexibility, facilitating the deformation of the screen 1. Furthermore, copper plates are relatively inexpensive, contributing to overall cost control.

[0038] Optionally, see Figure 1 and Figure 2 In this embodiment of the invention, along a direction perpendicular to the screen 1, the projection of the mounting plate 6 is located in the central region of the deformation space.

[0039] Specifically, along the direction perpendicular to the screen 1, the projection of the mounting plate 6 is located in the central area of ​​the deformation space, which is equivalent to the fingerprint acquisition device 4 being located in the center of the screen 1. The distance between the center and each area of ​​the screen 1 is equal, making the fingerprint information collected by the fingerprint acquisition device 4 more accurate, thereby improving the accuracy of the fingerprint recognition function of the screen 1.

[0040] Optionally, see Figure 1 and Figure 2 In this embodiment of the invention, the pressure-sensitive component includes a variable resistor 51; one end of the variable resistor 51 is fixedly connected to the screen 1, and the other end is fixedly connected to the mounting plate 6, and the resistance value of the variable resistor 51 changes with the pressing operation.

[0041] Specifically, in one embodiment, a resistive detection principle is adopted. The pressure-sensitive component includes a variable resistor 51. The resistance value of the variable resistor 51 changes due to changes in the external environment. One end of the variable resistor 51 is fixedly connected to the screen 1, and the other end is fixedly connected to the mounting plate 6. For example, the variable resistor 51 is a flexible resistor whose shape and structure can change. When the screen 1 receives a pressing operation, the screen 1 undergoes irregular deformation, stretching or compressing the flexible resistor, causing its shape and structure to change. The resistance value of the flexible resistor changes, and thus the detection result of the pressure-sensitive component changes. The area with greater pressing force has a greater deformation of the flexible resistor, and the resistance value changes accordingly. Therefore, the pressing force can be detected by the change in the detection result of the pressure-sensitive component.

[0042] Optionally, see Figure 1 and Figure 2In this embodiment of the invention, the pressure-sensitive component further includes a fixed resistor 52, which 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.

[0043] Specifically, the pressure-sensitive component also includes a fixed resistor 52. The resistance value of the fixed resistor 52 does not change due to changes in the external environment, and the fixed resistor 52 is fixedly connected to the mounting plate 6. There are two fixed resistors 52 and two variable resistors 51. The four resistors are electrically connected to form a Wheatstone bridge. The difference between the variable resistor 51 and the fixed resistor 52 before and after the pressing operation is used to reflect the result of the pressing size on the Wheatstone bridge, thereby differentially amplifying the output result of the detection component to improve the sensitivity of the pressure-sensitive module for pressing operation detection.

[0044] Optionally, see Figure 1 and Figure 2 In this embodiment of the invention, along the direction perpendicular to the screen 1, the projection of the variable resistor 51 is greater than the projection of the fixed resistor 52.

[0045] Specifically, along the direction perpendicular to screen 1, the projection of the variable resistor 51 is larger than the projection of the fixed resistor 52, so as to ensure that the variable resistor 51 can still deform to change its resistance value when the pressing force is large, thereby enabling the detection component to have a large pressing force detection range and ensuring the accuracy of the detection results.

[0046] Optionally, see Figure 3 and Figure 4 In this embodiment of the invention, the pressure-sensitive component includes a first electrode plate, a second electrode plate, and a substrate 54; the first electrode plate and the second electrode plate are slidably connected to the mounting plate 6, and the substrate 54 is fixedly connected to the side of the fingerprint acquisition device 4 away from the mounting plate 6; along a direction perpendicular to the screen 1, at least a portion of the projection of the first electrode plate is located outside the substrate 54, and the projection of the second electrode plate is located inside the substrate 54.

[0047] Specifically, in another embodiment, the pressure-sensitive component adopts a capacitive detection principle, including a first electrode 53, a second electrode 53, and a substrate 54. Note that the identical markings on the first and second electrodes only indicate that... Figure 3 and Figure 4The first and second electrodes are both located at the marked positions, and are essentially two different electrodes. Both electrodes carry a charge and are slidably connected to the mounting plate 6. The substrate 54 is fixedly connected to the side of the fingerprint sensor 4 furthest from the mounting plate 6. The substrate 54 also carries a charge. The first and second electrodes are positioned opposite to the substrate 54, forming a capacitor between the first electrode and the substrate 54, and another capacitor between the second electrode and the substrate 54.

[0048] When screen 1 receives a press operation, such as Figure 4 As indicated by the arrows, the mounting plate 6 moves, and the fingerprint collection device 4 on the mounting plate 6 drives the substrate 54 to move synchronously with the mounting plate 6. The first and second electrodes slide relative to the mounting plate 6 under their own gravity, thus causing the first and second electrodes to move relative to the substrate 54. Along a direction perpendicular to the screen 1, at least a portion of the projection of the first electrode is located outside the substrate 54, while the entire projection of the second electrode is located inside the substrate 54. During the movement of the first and second electrodes relative to the substrate 54, the vertical projection area of ​​the first electrode 53 within the substrate 54 changes, while the vertical projection area of ​​the second electrode 53 within the substrate 54 remains unchanged. Therefore, using the capacitance formed by the second electrode and the substrate 54 as a reference capacitance, a differential signal is established. The change in capacitance is used to detect the magnitude of the pressing force. For example, if the change in capacitance is:

[0049] Wherein, C1 represents the capacitance formed by the first electrode plate and the substrate 54, and C2 represents the capacitance formed by the second electrode plate and the substrate 54, i.e., the reference capacitor. In this embodiment, the reference capacitor is used for detection, which can avoid the problem of inconsistent elasticity after pressing, improve the sensitivity of the pressure-sensitive module. At the same time, the installation difficulty of capacitance detection is lower than that of resistance detection, which is convenient for personnel to assemble. It can still maintain high sensitivity and reliability under multiple pressing operations and has a longer service life.

[0050] Optionally, see Figure 3 and Figure 4 In this embodiment of the invention, the pressure-sensitive component further includes a push rod 55; one end of the push rod 55 is fixedly connected to the screen 1, and the other end is fixedly connected to the first electrode plate.

[0051] Specifically, the pressure-sensitive component also includes a push rod 55. One end of the push rod 55 is fixedly connected to the screen 1, and the other end is fixedly connected to the first electrode plate. When the screen 1 receives a press operation, the mounting plate 6 moves, and the push rod 55 can push the first electrode plate to slide relative to the mounting plate 6. This avoids the first electrode plate from getting stuck during the sliding process relative to the substrate 54 by its own gravity, thereby ensuring that the capacitance formed by the first electrode plate and the substrate 54 is variable and improving the accuracy of capacitance detection.

[0052] See Figure 5 The present invention also provides an electronic device, the electronic device including any of the aforementioned fingerprint pressure-sensitive modules, the screen 1 constituting the display screen of the electronic device, and the base 2 constituting the middle frame of the electronic device.

[0053] Specifically, the electronic devices provided in this embodiment of the invention include mobile phones, tablet computers, etc., with fingerprint pressure-sensitive modules embedded inside. To make the electronic devices easier to use, there can be multiple fingerprint pressure-sensitive modules. The screens 1 of the multiple fingerprint pressure-sensitive modules constitute the display screen of the electronic device, which can receive the user's fingerprint and pressure operations. The bases 2 of the multiple fingerprint pressure-sensitive modules constitute the middle frame of the electronic device, such as... Figure 5 As shown, the fingerprint sensor 4 is positioned directly below the fingerprint sensor area 7 of the electronic device, and the pressure-sensitive component is positioned in the pressure-sensitive channel 8 of the electronic device, correspondingly realizing the fingerprint recognition function and button detection function of the electronic device. Of course, other electronic components can also be embedded in the middle frame to meet more functions of the electronic device. The electronic device of this embodiment can simultaneously perform the fingerprint recognition function and button function of the screen 1, simplifying the user's operation and improving the user experience.

[0054] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0055] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A fingerprint pressure sensing module, characterized in that, Includes a screen, base, elastic element, fingerprint sensor, and at least one pressure-sensitive component; The screen and the base are disposed opposite to each other, and the elastic element is fixedly connected to the screen and the base respectively, forming a deformation space between the screen and the base; The fingerprint acquisition device is disposed within the deformation space and is fixedly connected to the screen. The fingerprint acquisition device is used to acquire fingerprint information on the screen. A pressure-sensitive channel is formed between the fingerprint acquisition device and the elastic element, and the pressure-sensitive component is disposed in the pressure-sensitive channel to detect the force of the pressing operation on the screen; The fingerprint pressure-sensitive module also includes a mounting plate, which is disposed within the deformation space and fixedly connected to the screen, and the fingerprint acquisition device is mounted on the mounting plate; The pressure-sensitive component includes a first electrode plate, a second electrode plate, and a substrate; The first electrode plate and the second electrode plate are slidably connected to the mounting plate, and the substrate is fixedly connected to the side of the fingerprint acquisition device away from the mounting plate; Along a direction perpendicular to the screen, at least a portion of the projection of the first electrode plate is located outside the substrate, and the projection of the second electrode plate is located inside the substrate. 2.The fingerprint pressure sensing module of claim 1, wherein, Along a direction perpendicular to the screen, the projection of the mounting plate is located in the central region of the deformation space. 3.The fingerprint pressure sensing module of claim 1, wherein, The pressure-sensitive component also includes a variable resistor; One end of the variable resistor is fixedly connected to the screen, and the other end is fixedly connected to the mounting plate. The resistance value of the variable resistor changes with the pressing operation.

4. The fingerprint pressure sensing module according to claim 3, wherein, The pressure-sensitive component also includes a fixed resistor, which is fixedly connected to the mounting plate; The variable resistor is electrically connected to the fixed resistor to form a Wheatstone bridge.

5. The fingerprint pressure sensing module according to claim 4, wherein, Along a direction perpendicular to the screen, the projection of the variable resistor is greater than the projection of the fixed resistor. 6.The fingerprint pressure sensing module of claim 1, wherein, The pressure-sensitive component also includes a push rod; One end of the push rod is fixedly connected to the screen, and the other end is fixedly connected to the first electrode plate.

7. The fingerprint pressure sensing module according to claim 1, wherein, The elastic element is foam.

8. An electronic device, comprising: The electronic device includes the fingerprint pressure-sensitive module according to any one of claims 1 to 7, the screen constitutes the display screen of the electronic device, and the base constitutes the middle frame of the electronic device.

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