Electronic device

Abstract

The utility model discloses electronic equipment, and belongs to the technical field of electronics. The electronic equipment comprises a frame body, a display screen and a pressure adjusting assembly, the frame body is provided with a mounting groove and a first cavity, a fingerprint module is arranged in the mounting groove, and the first cavity is filled with fluid; the display screen is provided with a fingerprint identification area, the first cavity is located between the fingerprint module and the fingerprint identification area, and the fluid is used for supporting the fingerprint identification area; the pressure adjusting assembly communicates with the first cavity, and under the condition that the fingerprint recognition area is pressed, the pressure adjusting assembly releases pressure for the first cavity; and under the condition that the pressing of the fingerprint identification area is relieved, the pressure adjusting assembly pressurizes the first cavity.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, specifically relating to an electronic device. Background Technology

[0002] With the rapid development of electronic devices, fingerprint recognition technology is becoming increasingly common in electronic devices, especially mobile terminals, for functions such as unlocking and payment. Among related technologies, ultrasonic fingerprint recognition technology has been widely used due to its advantages such as strong penetration and the ability to recognize dirty and wet fingers.

[0003] In related technologies, a fingerprint module is positioned below the display screen of an electronic device to ultrasonically identify the user's fingerprint located in the fingerprint recognition area of ​​the display screen. When a user performs fingerprint recognition, their finger is placed on the fingerprint recognition area of ​​the display screen, causing the display screen to deform under pressure. Since the fingerprint module is connected to the display screen, it is susceptible to deformation due to the force exerted by the display screen, which in turn leads to a decrease in the fingerprint module's recognition performance. Utility Model Content

[0004] The purpose of this application is to provide an electronic device that can solve the problem in the related art where the fingerprint module is easily deformed by the force of the display screen, resulting in a decrease in the fingerprint module's recognition performance.

[0005] This application provides an electronic device, which includes:

[0006] The frame has a mounting slot and a first cavity. The mounting slot contains a fingerprint module, and the first cavity is filled with fluid.

[0007] The display screen has a fingerprint recognition area, the first cavity is located between the fingerprint module and the fingerprint recognition area, and the fluid is used to support the fingerprint recognition area;

[0008] A pressure regulating component, which is connected to the first cavity, depressurizes the first cavity when the fingerprint recognition area is pressed, and pressurizes the first cavity when the fingerprint recognition area is released from pressure.

[0009] In this embodiment, the frame is provided with a mounting groove and a first cavity. The fingerprint module is disposed in the mounting groove. The first cavity is located between the fingerprint module and the fingerprint recognition area of ​​the display screen. The first cavity is filled with fluid. When the fingerprint recognition area is pressed, that is, when fingerprint recognition is performed, the fluid can support and buffer the display screen to reduce the deformation of the display screen. This can prevent the fingerprint on the fingerprint recognition area from deforming, thereby improving the recognition capability of the fingerprint module.

[0010] Furthermore, when the fingerprint recognition area is pressed, i.e. when fingerprint recognition is performed, the pressure regulating component can depressurize the first cavity to prevent the pressure inside the first cavity from increasing and squeezing the fingerprint module, which could cause the fingerprint module to deform or be damaged, thereby ensuring the fingerprint recognition performance of the fingerprint module; when the fingerprint recognition area is released, the pressure regulating component can pressurize the first cavity so that the fluid can drive the display screen to recover its deformation. Attached Figure Description

[0011] Figure 1 This is one of the partial cross-sectional views of the electronic device disclosed in the embodiments of this application (when the fingerprint recognition area of ​​the display screen is not deformed);

[0012] Figure 2 This is a second partial cross-sectional view of the electronic device disclosed in the embodiments of this application (when the fingerprint recognition area of ​​the display screen is deformed, that is, when the fingerprint recognition area is pressed, and the adjusting component is a valve).

[0013] Figure 3 This is a third partial cross-sectional view of the electronic device disclosed in the embodiments of this application (when the fingerprint recognition area of ​​the display screen is released, i.e. when the user's finger leaves the fingerprint recognition area).

[0014] Explanation of reference numerals in the attached figures:

[0015] 100 - User's finger; 200 - Frame; 210 - First cavity; 220 - Second cavity;

[0016] 230 - Boss; 240 - Mounting slot; 300 - Display screen; 400 - Fingerprint module;

[0017] 500 - Pressure regulating component; 510 - Pressure regulating element; 520 - Pressurization module; 530 - Control module;

[0018] 600 - First sealing connector; 700 - Second sealing connector. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The electronic device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0022] refer to Figures 1-3 An electronic device provided in this application embodiment may include a frame 200, a display screen 300, and a pressure regulating component 500.

[0023] The frame 200 may be provided with a mounting slot 240 (e.g., Figure 1 As shown in the dashed box in the diagram, a fingerprint module 400 can be disposed within the mounting groove 240, and the first cavity 210 is filled with fluid. A fingerprint recognition area can be provided on the display screen 300. The first cavity 210 can be located between the fingerprint module 400 and the fingerprint recognition area, and the fluid can be used to support the fingerprint recognition area. With this configuration, when the fingerprint recognition area is pressed, i.e., during fingerprint recognition, the fluid can support and buffer the display screen 300 to reduce deformation of the display screen 300, thereby preventing deformation of the fingerprint pressed against the fingerprint recognition area and improving the recognition capability of the fingerprint module 400.

[0024] In this embodiment, the fingerprint module 400 can be an ultrasonic fingerprint module. The ultrasonic fingerprint module emits ultrasonic waves by driving the piezoelectric material inside to vibrate. The ultrasonic waves pass through the fluid in the first cavity 210 and the fingerprint recognition area of ​​the display screen 300 to reach the user's finger 100. The ridges (i.e., the raised parts of the skin) and valleys (i.e., the recessed parts of the skin) of the fingerprint have different reflectivities to the ultrasonic waves. Most of the ultrasonic waves at the ridges of the fingerprint are absorbed by the finger. There is air between the valleys of the fingerprint and the display screen 300. The ultrasonic waves undergo total internal reflection at the interface between the air and the display screen 300 (specifically, the glass cover of the display screen 300). Therefore, the distribution of ultrasonic energy reflected by the fingerprint matches the fingerprint pattern. The ultrasonic fingerprint module can reconstruct the fingerprint pattern by collecting the charge distribution of the piezoelectric material, thereby achieving the purpose of fingerprint recognition.

[0025] Optionally, the fluid can be a low-impedance liquid, which refers to a liquid with low impedance to sound propagation. This reduces the fluid's impedance to ultrasonic wave propagation, thereby improving the recognition capability of the fingerprint module 400. Specifically, the fluid can be pure water or other liquids; it should be noted that pure water refers to water free of impurities. Of course, the fluid can also be a gas, for example, a gas with low impedance to sound propagation.

[0026] In this embodiment, the pressure regulating component 500 can communicate with the first cavity 210, wherein, as Figure 2 As shown, when the fingerprint recognition area is pressed, the pressure regulating component 500 depressurizes the first cavity 210. This prevents the increased pressure within the first cavity 210 from compressing the fingerprint module 400 and causing deformation or damage, thus ensuring the fingerprint recognition performance of the fingerprint module 400. When the fingerprint recognition area is released, the pressure regulating component 500 pressurizes the first cavity 210. This allows the display screen 300 to recover its deformation, preventing permanent deformation and extending its lifespan. Furthermore, using a flowable fluid to support the fingerprint recognition area of ​​the display screen 300, compared to using flexible support materials (such as foam) to support the display screen 300, makes the fingerprint module 400 less susceptible to deformation of the display screen 300, thus ensuring its recognition performance.

[0027] In an optional embodiment of this application, the frame 200 may further be provided with a second cavity 220. The pressure regulating component 500 may include a pressure regulating element 510, which may be connected to the cavity wall of the second cavity 220. When the fingerprint recognition area is pressed, the pressure regulating element 510 is activated, causing some of the fluid in the first cavity 210 to flow into the second cavity 220. In this embodiment, the second cavity 220 allows the fluid to circulate inside the frame 200, preventing fluid loss and enabling reuse. This helps maintain a stable total fluid volume within the entire device, ensuring long-term stable operation of the pressure regulating function. Simultaneously, the fluid flowing between the first cavity 210 and the second cavity 220 inside the frame 200 forms a relatively closed system, less susceptible to interference from external environmental factors, and can protect other components of the electronic device to a certain extent. When fluid flows into the second cavity 220, it prevents the fluid from being directly discharged into other parts of the electronic device, preventing damage or corrosion to surrounding circuits and components.

[0028] In other embodiments, the frame 200 may not have a second cavity 220, and the pressure regulating member 510 may be directly connected to the outside atmosphere. When the fingerprint recognition area is pressed, the pressure regulating member 510 is activated, causing some of the fluid in the first cavity 210 to flow out of the frame 200.

[0029] In an optional embodiment, the pressure regulating component 510 may include a valve that opens when the fingerprint recognition area is pressed, thereby connecting the first cavity 210 and the second cavity 220, allowing fluid to flow from the first cavity 210 into the second cavity 220. In this embodiment, the valve can open stably when the fingerprint recognition area is pressed, ensuring communication between the first cavity 210 and the second cavity 220 and reducing the likelihood of accidental closure or misoperation. Furthermore, when the fingerprint recognition area is not pressed, the valve can reliably remain closed, maintaining isolation between the first cavity 210 and the second cavity 220 and ensuring system stability.

[0030] Furthermore, compared to a pressure regulating component 510 that includes a piston, the valve structure of the pressure regulating component 510 is relatively compact, occupies less space, has lower maintenance costs, and higher reliability.

[0031] Furthermore, the pressure regulating component 500 may also include a pressurizing module 520, which can communicate with the second cavity 220. When the fingerprint recognition area is released, the pressurizing module 520 pressurizes the second cavity 220 to allow the fluid in the second cavity 220 to flow back to the first cavity 210. Thus, when the fingerprint recognition area is no longer pressed, and the first cavity 210 needs to return to its initial state, the pressurizing module 520 pressurizes the second cavity 220, prompting the fluid to flow back to the first cavity 210, allowing the pressure in the first cavity 210 to quickly return to normal levels, preparing for the next fingerprint recognition press operation and ensuring the system can operate continuously and stably.

[0032] Here, the first cavity 210 is pressurized by pressurizing the second cavity 220 through the pressurizing module 520. Compared with the method of pressurizing the first cavity 210 directly by the pressurizing module 520, the fluid can circulate, so that the fluid will not be lost and can be reused without the need to add fluid to the first cavity 210.

[0033] In other embodiments, the pressurization module 520 may not be connected to the second cavity 220. For example, the pressurization module 520 may be connected to the first cavity 210 and may directly pressurize the first cavity 210.

[0034] Optionally, the valve can be a bidirectional relief valve. When the fingerprint recognition area is pressed, the fluid is compressed by the fingerprint recognition area, applying pressure to the valve core of the bidirectional relief valve. At this time, the force on the valve core is greater than the set pressure of the valve core spring, causing the valve core to actuate and thus opening the bidirectional relief valve, allowing some fluid to flow from the first cavity 210 into the second cavity 220. When the fingerprint recognition area is released, the pressurizing module 520 pressurizes the second cavity 220, making the pressure in the second cavity 220 greater than the set pressure of the valve core spring, keeping the valve core open, and allowing the fluid in the second cavity 220 to flow back to the first cavity 210. Alternatively, the valve can also be a bidirectional balancing valve, or other valves that can automatically open under pressure. Of course, the valve can also be a solenoid valve, which automatically opens after receiving a signal that the fingerprint recognition area is pressed.

[0035] In another optional embodiment, the pressure regulating component 510 may include a piston slidably disposed within the second cavity 220 and sealingly engaged with the cavity wall of the second cavity 220. The piston can slide between an initial position and a pressure-relief position. When the fingerprint recognition area is pressed, the piston slides to the pressure-relief position, allowing some fluid in the first cavity 210 to flow into the second cavity 220. In this embodiment, the piston's ability to slide within the second cavity 220 allows for flexible adjustment of the fluid distribution between the first cavity 210 and the second cavity 220 based on the pressure applied to the fingerprint recognition area. This enables precise adjustment of the pressure in the first cavity 210. Furthermore, the piston's movement from the initial position to the pressure-relief position is a gradual process, ensuring that the fluid in the first cavity 210 flows gradually into the second cavity 220. This avoids sudden pressure release and achieves a smooth, gradual pressure relief effect, thereby preventing sudden pressure changes in the first cavity 210 from impacting and damaging the display screen 300 or the fingerprint module 400.

[0036] Here, the pressure regulating component 510, which includes a piston, has greater structural strength than the elastic diaphragm type described below. It can withstand higher pressure, is more stable in high-pressure environments, is less prone to damage, and has stronger fatigue resistance.

[0037] In other embodiments, the pressure regulating member 510 may also be an elastic film. When the fingerprint recognition area is pressed, the fluid applies a force to the elastic film, causing the elastic film to deform in the direction away from the first cavity 210 in the second cavity 220, thereby forming a space capable of accommodating a portion of the fluid. When the fingerprint recognition area is released from pressure, the elastic film returns to its original shape and drives the fluid located in the space of the elastic film back into the first cavity 210.

[0038] Furthermore, the pressure regulating assembly 500 may also include a reset module. When the fingerprint recognition area is released, the reset module drives the piston to slide to its initial position, allowing the fluid in the second cavity 220 to flow back to the first cavity 210. This configuration ensures that the pressure in the first cavity 210 automatically returns to its initial state after the fingerprint recognition press operation, guaranteeing consistent pressure conditions for the next fingerprint recognition. This improves the accuracy and stability of the recognition process and promotes fluid circulation between the first cavity 210 and the second cavity 220, preventing excessive fluid accumulation or loss in any cavity and ensuring the normal operation of the entire pressure regulating system.

[0039] In an optional embodiment, the reset module may include an elastic reset member, the two ends of which may be connected to the frame 200 and the piston, respectively. The elastic reset member can be used to drive the piston back to its initial position. In this embodiment, the elastic reset member can quickly release the stored elastic potential energy after the pressure in the fingerprint recognition area is released, providing a large restoring force to the piston, causing the piston to slide back to its initial position quickly, thereby rapidly restoring the pressure in the first cavity 210 to its initial state. At the same time, the elastic reset member has a simple structure and does not require complex mechanical transmission devices or electronic control components to realize the piston reset function, which helps to simplify the structure of the reset module, thereby making the structure of the pressure regulating component 500 simpler and reducing the cost of the entire pressure regulating component 500, and thus reducing the cost of the electronic device.

[0040] Here, the elastic reset element can be a spring or other elastic component.

[0041] Alternatively, the reset module may include a pressure module 520, which can communicate with the second cavity 220. When the fingerprint recognition area is released from pressure, the pressure module 520 pressurizes the second cavity 220 to drive the piston back to its initial position. This configuration allows the pressure module 520 to precisely control the pressure applied to the second cavity 220, thereby accurately driving the piston to reset. The pressure level can also be flexibly adjusted according to the specific needs of the system, ensuring the piston accurately returns to its initial position. This achieves precise control of the pressure regulating component 500 and prevents excessive pressure on the fingerprint recognition area during recovery from deformation. Furthermore, by pressurizing the second cavity 220 through the pressurizing module 520 to drive the piston reset, compared to driving the piston reset through an elastic reset member, the pressurizing module 520 can quickly provide sufficient pressure to the second cavity 220, allowing the piston to quickly return to its initial position. This can effectively shorten the piston reset time, enabling the fingerprint recognition area to recover its deformation more quickly. At the same time, the pressurizing module 520 can continuously pressurize the second cavity 220, eliminating the problem of mechanical fatigue and extending its service life.

[0042] In this embodiment, the pressurization module 520 may include a pressurizer that communicates with the second cavity 220 to fill the second cavity 220 with fluid, thereby increasing the pressure in the second cavity 220. Optionally, the pressurizer may be a gas pressurizer, or it may be a booster pump or other device.

[0043] Optionally, the pressure regulating component 500 may further include a control module 530, which can be communicatively connected to the pressurizing module 520. When the fingerprint recognition area is released, i.e., when the user's finger 100 leaves the fingerprint recognition area, the control module 530 can control the pressurizing module 520 to pressurize the second cavity 220; when the pressure in the second cavity 220 reaches a preset pressure, the control module 530 can control the pressurizing module 520 to stop pressurizing the second cavity 220. In this way, pressure regulation can be achieved automatically. Here, the preset pressure can be the initial pressure in the second cavity 220.

[0044] In this embodiment, the control module 530 can be a control chip.

[0045] In an optional embodiment of this application, the volume of the second cavity 220 is smaller than the volume of the first cavity 210. This configuration ensures that only a portion of the fluid flows into the second cavity 220 when the fingerprint recognition area is pressed, thus ensuring that fluid still exists in the first cavity 210, so that the fluid can always support the fingerprint recognition area.

[0046] Of course, the volume of the second cavity 220 can also be greater than or equal to the volume of the first cavity 210.

[0047] In an optional embodiment, the pressurization module 520 may be provided with an exhaust port, which may be connected to the second cavity 220. When the fingerprint recognition area is pressed, the gas in the second cavity 220 can be discharged through the exhaust port. This configuration eliminates the need for an additional pressure relief channel on the frame 200, thereby simplifying the structure of the frame 200.

[0048] Optionally, when the fluid is a liquid, in order to prevent the liquid from flowing out of the pressurizing module 520, a breathable and waterproof membrane can be provided at the connection between the second cavity 220 and the pressurizing module 520. Specifically, the breathable and waterproof membrane can be a polyurethane membrane, an expanded polytetrafluoroethylene membrane, or other waterproof and breathable membranes.

[0049] In another alternative embodiment, a pressure relief channel may be provided on the frame 200, which can communicate with the second cavity 220 to facilitate the discharge of gas from the second cavity 220. Furthermore, the electronic device may also include a one-way valve, which can be disposed on the pressure relief channel. When the fingerprint recognition area is pressed, the one-way valve opens along the direction from the second cavity 220 to the pressure relief channel; when the fingerprint recognition area is released from pressure, the one-way valve closes. With this configuration, when the fingerprint recognition area is pressed, some fluid in the first cavity 210 flows into the second cavity 220, causing an increase in pressure within the second cavity 220. At this time, the one-way valve opens along the direction from the second cavity 220 to the pressure relief channel, releasing the excess pressure and maintaining the pressure within the second cavity 220 within a stable range. This provides a stable pressure environment for the fluid in the first cavity 210, ensuring uniform contact pressure between the fingerprint recognition area and the finger, preventing deformation of the fingerprint module 400 under pressure, and avoiding problems such as unclear fingerprint image acquisition due to pressure fluctuations. This helps improve the accuracy of fingerprint recognition. Furthermore, compared to the method of venting gas from the second cavity 220 through the pressurization module 520, there is no need to adjust the operating mode of the pressurization module 520, which simplifies the pressure adjustment operation.

[0050] Optionally, if the fluid is a liquid, a breathable and waterproof membrane may be provided at the connection between the pressure relief channel and the second cavity 220 to prevent the fluid from flowing out of the pressure relief channel.

[0051] In an optional embodiment, the control pressure of the pressure regulating member 510 is less than or equal to the minimum stress of the fingerprint recognition area of ​​the display screen 300. This prevents the fluid from failing to activate the pressure regulating member 510 when the fingerprint recognition area of ​​the display screen 300 deforms, thus preventing the pressure from being transmitted through the display screen 300 to the user's fingerprint and causing fingerprint deformation, or the pressure from being transmitted to the fingerprint module 400 and causing the fingerprint module 400 to deform.

[0052] In an optional embodiment, both the cavity walls of the first cavity 210 and the cavity walls of the second cavity 220 may be provided with protective films. This arrangement can prevent fluid corrosion or oxidation of the frame 200. Here, the protective film can be an anti-corrosion film, specifically one or more of polyimide film, polytetrafluoroethylene film, silicone film, and other coatings or films that can provide anti-corrosion properties.

[0053] Of course, the walls of the first cavity 210 and the second cavity 220 may not be provided with protective membranes.

[0054] In an optional embodiment, in the direction from the mounting slot 240 to the first cavity 210, the orthographic projection of the fingerprint module 400 covers the orthographic projection of the first cavity 210, and the orthographic projection of the first cavity 210 covers the orthographic projection of the fingerprint recognition area. This arrangement allows the fingerprint module 400 to receive most of the signals reflected back from the fingerprint recognition area, thereby ensuring the recognition performance of the fingerprint module 400.

[0055] Of course, in the direction from the mounting slot 240 to the first cavity 210, the orthographic projection of the fingerprint module 400 may not cover the orthographic projection of the first cavity 210, and the orthographic projection of the first cavity 210 may not cover the orthographic projection of the fingerprint recognition area.

[0056] In an optional embodiment of this application, the frame 200 may also be provided with a boss 230, which may surround the first cavity 210. A first sealing connector 600 may also be provided in the mounting groove 240, and the fingerprint module 400 may be sealed to the boss 230 through the first sealing connector 600. In this embodiment, the boss 230 can provide a mounting position for the fingerprint module 400, so that the fingerprint module 400 is only connected to the frame 200 and not directly connected to the display screen 300. The contact area and contact position between the fingerprint module 400 and the frame 200 are fixed. Since the frame 200 has high strength and is not affected by the deformation of the display screen 300, the fingerprint module 400 can be guaranteed to be unaffected by the deformation of the display screen 300. At the same time, since the frame 200 is not easily deformed, it is not easy to affect the fingerprint in the fingerprint recognition area.

[0057] Here, the first sealing connector 600 can be a sealant.

[0058] In other embodiments, the frame 200 may not have the boss 230. For example, the sidewall of the fingerprint module 400 may be connected to the sidewall of the mounting groove 240 through the first sealing connector 600.

[0059] In an optional embodiment, the frame 200 can be connected to the display screen 300 via a second sealing connector 700, and the second sealing connector 700 can cover the first cavity 210. This configuration achieves both the connection between the frame 200 and the display screen 300 and seals the first cavity 210, preventing fluid from leaking out through the gap between the frame 200 and the display screen 300. Here, the second sealing connector 700 can be a sealant.

[0060] Of course, the second sealing connector 700 may not cover the first cavity 210.

[0061] In this embodiment, the mounting groove 240, the first cavity 210, and the second cavity 220 can all be formed by cutting the frame 200 using a CNC machine tool.

[0062] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application 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 this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, comprising: The application relates to a frame (200) provided with a mounting groove (240) and a first cavity (210), a fingerprint module (400) arranged in the mounting groove (240), and a display screen (300) provided with a fingerprint identification area, wherein the first cavity (210) is located between the fingerprint module (400) and the fingerprint identification area, and a fluid is filled in the first cavity (210) to support the fingerprint identification area; a pressure adjusting assembly (500) is in communication with the first cavity (210), and the pressure adjusting assembly (500) is used for pressure relief of the first cavity (210) when the fingerprint identification area is pressed, and the pressure adjusting assembly (500) is used for pressure increase of the first cavity (210) when the fingerprint identification area is released. The frame (200) is further provided with a second cavity (220), and the pressure adjusting assembly (500) comprises a pressure regulating piece (510) connected with a cavity wall of the second cavity (220), and the pressure regulating piece (510) is used for flowing part of the fluid in the first cavity (210) into the second cavity (220) when the fingerprint identification area is pressed. The pressure regulating piece (510) comprises a valve, and the valve is opened to make the first cavity (210) communicate with the second cavity (220) when the fingerprint identification area is pressed. The pressure adjusting assembly (500) further comprises a pressure increasing module (520) in communication with the second cavity (220), and the pressure increasing module (520) is used for pressure increase of the second cavity (220) when the fingerprint identification area is released, so that the fluid in the second cavity (220) flows back to the first cavity (210).

2. The electronic device of claim 1, wherein, The pressure regulating piece (510) comprises a piston slidably arranged in the second cavity (220) and in sealing cooperation with the cavity wall of the second cavity (220), and the piston can slide between an initial position and a pressure relief position, and part of the fluid in the first cavity (210) flows into the second cavity (220) when the piston slides to the pressure relief position due to the pressing of the fingerprint identification area.

3. The electronic device of claim 2, wherein, The pressure adjusting assembly (500) further comprises a reset module, and the reset module drives the piston to slide to the initial position to make the fluid in the second cavity (220) flow back to the first cavity (210) when the fingerprint identification area is released. The reset module comprises an elastic reset piece, and two ends of the elastic reset piece are connected with the frame (200) and the piston respectively, and the elastic reset piece is used for driving the piston to return to the initial position.

4. The electronic device of claim 2, wherein, ​ ​ 5. The electronic device of claim 4, wherein, ​ Or, the reset module comprises a pressurizing module (520) in communication with the second cavity (220), and the pressurizing module (520) pressurizes the second cavity (220) to drive the piston to return to the initial position when the fingerprint recognition area is unpressed.

6. The electronic device of claim 3 or 5, wherein, The pressurizing module (520) is provided with an exhaust port in communication with the second cavity (220), and the gas in the second cavity (220) is exhausted through the exhaust port when the fingerprint recognition area is pressed. The frame (200) is provided with a pressure relief channel in communication with the second cavity (220), and the electronic device further comprises a one-way valve arranged on the pressure relief channel, and the one-way valve is open in the direction from the second cavity (220) to the pressure relief channel when the fingerprint recognition area is pressed, and the one-way valve is closed when the fingerprint recognition area is unpressed.

7. The electronic device of claim 2, wherein, The cavity wall of the first cavity (210) and the cavity wall of the second cavity (220) are both provided with a protective film.

8. The electronic device of claim 1, wherein, In the direction from the mounting groove (240) to the first cavity (210), the orthographic projection of the fingerprint module (400) covers the orthographic projection of the first cavity (210), and the orthographic projection of the first cavity (210) covers the orthographic projection of the fingerprint recognition area.

9. The electronic device of claim 1, wherein, The frame (200) is further provided with a boss (230) surrounding the first cavity (210), and the mounting groove (240) is further provided with a first sealing connector (600), and the fingerprint module (400) is sealingly connected with the boss (230) through the first sealing connector (600).

10. The electronic device of claim 1, wherein, The frame (200) is connected with the display screen (300) through a second sealing connector (700), and the second sealing connector (700) covers the first cavity (210).

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