Fingerprint identification method and device, electronic equipment and storage medium

Abstract

Embodiments of the present application provide a fingerprint identification method and device, electronic equipment and storage medium, which are applied to a terminal with a display screen, the upper surface of the display screen is attached with a photoelectric coating, and the lower part of the display screen is provided with a fingerprint sensor, the method comprising: obtaining a display screen touch instruction, controlling a fingerprint identification area to enter an HBM mode according to the display screen touch instruction, outputting a first calibration voltage to the photoelectric coating on the fingerprint identification area, and obtaining a fingerprint identification result of the fingerprint sensor. The fingerprint identification area is located above the fingerprint identification sensor; the first calibration voltage is used to display the photoelectric coating in a transparent state. The problem of dazzling caused by the high brightness of the screen entering the HBM mode in the fingerprint identification process is solved, the accuracy of fingerprint identification is ensured, the adverse effects on the user's vision are minimized, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of fingerprint recognition technology, and in particular to a fingerprint recognition method, device, electronic device and storage medium. Background Technology

[0002] With the rapid development and widespread adoption of smart terminals, users are increasingly demanding higher standards for device security, convenience, and aesthetics. Fingerprint recognition technology, as an important biometric technology, has been widely applied in smart terminals, providing users with a secure and fast method for unlocking and authenticating their devices.

[0003] Optical in-display fingerprint recognition technology is a new type of fingerprint recognition technology that has developed in recent years. It integrates the fingerprint sensor under the phone screen, enabling a full-screen design and improving the phone's aesthetics and screen-to-body ratio. At the same time, in-display fingerprint recognition technology also offers higher security and convenience, allowing users to perform fingerprint recognition directly on the screen.

[0004] In optical under-display fingerprint recognition, HBM (High Brightness Mode) plays a crucial role. This is mainly due to the self-emissive nature of OLED screens, where each pixel can independently control its own light emission. The high brightness of HBM mode can more fully illuminate the finger, allowing the reflected light to carry clearer and richer fingerprint information. However, excessive brightness in HBM mode may cause eye strain and negatively impact the user's vision, thus reducing the user experience. Summary of the Invention

[0005] Based on this, this application provides a fingerprint recognition method, device, electronic device, and storage medium, which solves the problem of glare caused by excessive brightness when the screen enters HBM mode during fingerprint recognition, ensuring the accuracy of fingerprint recognition while minimizing adverse effects on the user's vision and improving the user experience.

[0006] As a first aspect of this application, a fingerprint recognition method is provided, applied to a terminal equipped with a display screen, wherein the upper surface of the display screen is coated with a photoelectric coating, and a fingerprint sensor is disposed below the display screen, comprising the following steps:

[0007] Obtain a touch command for the display screen, wherein the touch command for the display screen is generated based on a touch operation detected on the fingerprint recognition area of ​​the display screen;

[0008] According to the touch command of the display screen, the fingerprint recognition area is controlled to enter HBM mode, and a first calibration voltage is output to the photoelectric coating on the fingerprint recognition area, wherein the fingerprint recognition area is located above the fingerprint recognition sensor; the first calibration voltage is used to make the photoelectric coating transparent.

[0009] Obtain the fingerprint recognition result of the fingerprint sensor, wherein the fingerprint recognition result is obtained by the fingerprint sensor recognizing the fingerprint image collected by the fingerprint sensor based on the reflected light in the fingerprint recognition area.

[0010] As a second aspect of this application, a fingerprint recognition device is provided, applied to a terminal equipped with a display screen, wherein the upper surface of the display screen is coated with a photoelectric coating, and a fingerprint sensor is disposed below the display screen, comprising:

[0011] The instruction acquisition module is used to acquire display screen touch instructions, wherein the display screen touch instructions are generated based on touch operations detected on the fingerprint recognition area of ​​the display screen;

[0012] A voltage calibration module is used to control the fingerprint recognition area to enter HBM mode according to the touch command of the display screen, and output a first calibration voltage to the photoelectric coating on the fingerprint recognition area, wherein the fingerprint recognition area is located above the fingerprint recognition sensor; the first calibration voltage is used to make the photoelectric coating transparent.

[0013] A fingerprint recognition module is used to obtain the fingerprint recognition result of the fingerprint sensor, wherein the fingerprint recognition result is obtained by the fingerprint sensor recognizing the fingerprint image collected by the fingerprint sensor based on the reflected light in the fingerprint recognition area.

[0014] As a third aspect of the present application, an electronic device is provided, including a processor, a memory, and a computer program stored in the memory and executable on the processor; when executed by the processor, the computer program implements the steps of the fingerprint recognition method as described in the first aspect.

[0015] As a fourth aspect of the present application, a storage medium is provided, the storage medium storing a computer program, which, when executed by a processor, implements the steps of the fingerprint recognition method as described in the first aspect.

[0016] The embodiments of this application solve the problem of excessive brightness causing flickering when the screen enters HBM mode during fingerprint recognition, ensuring the accuracy of fingerprint recognition while minimizing adverse effects on the user's vision and improving the user experience.

[0017] To better understand and implement this application, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 A schematic flowchart illustrating the fingerprint recognition method provided in the first embodiment of this application;

[0019] Figure 2This is a flowchart illustrating step S2 of the fingerprint recognition method provided in the first embodiment of this application;

[0020] Figure 3 This is a flowchart illustrating step S21 of the fingerprint recognition method provided in the first embodiment of this application;

[0021] Figure 4 This is a flowchart illustrating step S2 of the fingerprint recognition method provided in the second embodiment of this application.

[0022] Figure 5 A schematic flowchart illustrating the fingerprint recognition method provided in the third embodiment of this application;

[0023] Figure 6 This is a flowchart illustrating step S3 of the fingerprint recognition method provided in the first embodiment of this application;

[0024] Figure 7 This is a flowchart illustrating step S3 of the fingerprint recognition method provided in the fourth embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the fingerprint recognition device provided in the fifth embodiment of this application;

[0026] Figure 9 This is a schematic diagram of the structure of an electronic device provided in the sixth embodiment of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. Wherein, when the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] It should be understood that the embodiments described below do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0029] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application are also intended to include the plural forms unless the context clearly indicates otherwise. Furthermore, in the description of this application, unless otherwise stated, “a plurality” means two or more. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items, for example, A and / or B, which can represent: A alone, A and B together, and B alone; the character “ / ” generally indicates that the preceding and following objects are in an “or” relationship.

[0030] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, this information should not be limited to these terms, and these terms are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Depending on the context, the word "if" as used in this application can be interpreted as "when," "when," or "in response to determination."

[0031] The application scenarios of the fingerprint recognition method in this application include a fingerprint recognition device, which is applied to a terminal with a display screen. The upper surface of the display screen is coated with a photoelectric coating, and a fingerprint sensor is disposed below the display screen.

[0032] The fingerprint recognition method of this application can be executed by a fingerprint recognition method device (hereinafter referred to as the recognition device), which can implement the fingerprint recognition method through software and / or hardware.

[0033] The identification device can be part of the terminal or independent of the terminal; the identification method device can consist of two or more physical entities or a single physical entity. The hardware referred to by the identification method device essentially refers to computer equipment; for example, the identification method device can be a mobile phone, tablet, or smart interactive whiteboard, or other smart device.

[0034] Please see Figure 1 , Figure 1 The following is a flowchart illustrating the fingerprint recognition method provided in the first embodiment of this application. The method includes the following steps:

[0035] S1: Receive touch command for display screen.

[0036] In this embodiment, the identification device obtains a touch command on the display screen, wherein the touch command is generated based on a touch operation detected on the fingerprint recognition area of ​​the display screen, indicating that the terminal is in fingerprint recognition mode.

[0037] S2: According to the touch command of the display screen, control the fingerprint recognition area to enter HBM mode and output a first calibration voltage to the photoelectric coating on the fingerprint recognition area.

[0038] In HBM (High Brightness Model) mode, the fingerprint recognition area emits high-brightness light when touched, illuminating the finger more fully and allowing the reflected light to carry clearer and richer fingerprint information. This light carrying fingerprint information passes through the gaps between screen pixels and reaches the fingerprint sensor under the screen. The high-brightness light increases the intensity of reflected light, making the signal received by the sensor stronger, thereby improving the success rate and accuracy of fingerprint recognition.

[0039] In this embodiment, the recognition device controls the fingerprint recognition area to enter HBM mode according to the touch command of the display screen, and outputs a first calibration voltage to the photoelectric coating on the fingerprint recognition area so that the fingerprint sensor located below the fingerprint recognition area can better collect the light reflected by the finger and obtain clearer and richer fingerprint information. The fingerprint recognition area is located above the fingerprint recognition sensor. The first calibration voltage is used to make the photoelectric coating transparent.

[0040] The display screen touch commands include coordinate parameters corresponding to the touch operation;

[0041] Please see Figure 2 , Figure 2 The flowchart of step S2 in the fingerprint recognition method provided in the first embodiment of this application is shown below, including step S21:

[0042] S21: Determine the fingerprint recognition area corresponding to the touch operation based on the coordinate parameters corresponding to the touch operation, and control the fingerprint recognition area corresponding to the touch operation to enter HBM mode.

[0043] In this embodiment, the recognition device determines the fingerprint recognition area corresponding to the touch operation based on the coordinate parameters corresponding to the touch operation, and controls the fingerprint recognition area corresponding to the touch operation to enter HBM mode.

[0044] Specifically, the display screen also includes a screen driving circuit; please refer to [link / reference]. Figure 3 , Figure 3The flowchart of step S21 in the fingerprint recognition method provided in the first embodiment of this application is shown below, including step S211:

[0045] S211: The screen driving circuit outputs a second calibration voltage to the pixel of the fingerprint recognition area corresponding to the touch operation, and enters HBM mode.

[0046] In this embodiment, the recognition device outputs a second calibration voltage to the pixel of the fingerprint recognition area corresponding to the touch operation through the screen driving circuit, and enters HBM mode, wherein the second calibration voltage is used to increase the brightness of the pixel.

[0047] Specifically, the screen driving circuit includes a voltage comparator, a pixel voltage input voltage comparator, and a calibration voltage input voltage comparator. The voltage comparator compares the pixel voltage with the calibration voltage. When the pixel voltage equals the second calibration voltage, the pixel voltage is determined to be the luminance voltage. When the pixel voltage does not equal the second calibration voltage, the second calibration voltage is determined to be the luminance voltage. The screen driving circuit outputs the luminance voltage to the pixel in the fingerprint recognition area corresponding to the touch operation. By maintaining the luminance voltage at the second calibration voltage, the intensity of light emitted in the HBM area is ensured to be high, so that the photon energy after light reflection remains high, and the fingerprint sensor can obtain a high-quality fingerprint image when performing fingerprint recognition.

[0048] In an optional embodiment, the photoelectric coating is an electrochromic coating material. The chemical reaction products of the electrochromic coating have good stability, and the color state of the material can be maintained even when the voltage is removed. Please refer to [link / reference]. Figure 4 , Figure 4 The flowchart of step S2 in the fingerprint recognition method provided in the second embodiment of this application is shown below, including step S22:

[0049] S22: If the photoelectric coating on the fingerprint recognition area is transparent, stop outputting calibration voltage to the photoelectric coating on the fingerprint recognition area.

[0050] In this embodiment, if the photoelectric coating on the fingerprint recognition area is transparent, the recognition device stops outputting calibration voltage to the photoelectric coating on the fingerprint recognition area. This allows the fingerprint sensor under the fingerprint recognition area to collect light reflected from the finger through the photoelectric coating above, ensuring the accuracy of fingerprint collection. At the same time, it eliminates the need to continuously output calibration voltage to the photoelectric coating on the fingerprint recognition area, reducing power consumption and improving the user experience.

[0051] S3: Obtain the fingerprint recognition result from the fingerprint sensor.

[0052] In this embodiment, the recognition device obtains the fingerprint recognition result from the fingerprint sensor, wherein the fingerprint recognition result is obtained by the fingerprint sensor recognizing the fingerprint image based on the reflected light in the fingerprint recognition area. This solves the problem of excessive brightness and flickering caused by the screen entering HBM mode during fingerprint recognition, ensuring the accuracy of fingerprint recognition while minimizing adverse effects on the user's vision and improving the user experience.

[0053] In an optional embodiment, please refer to Figure 5 , Figure 5 This is a flowchart illustrating the fingerprint recognition method provided in the third embodiment of this application, which further includes step S4. Step S4, preceding step S1, is specifically as follows:

[0054] S4: If the current terminal is in a static state, output a third calibration voltage to the photoelectric coating on the fingerprint recognition area, and output a fourth calibration voltage to the voltage of the photoelectric coating on the non-fingerprint recognition area of ​​the display screen.

[0055] The static state indicates that the terminal is not unlocked and no touch operation is detected on the fingerprint recognition area of ​​the display screen.

[0056] In this embodiment, if the current terminal is in a static state, the recognition device outputs a third calibration voltage to the photoelectric coating on the fingerprint recognition area. The third calibration voltage is used to display the fingerprint pattern set on the photoelectric coating to remind the user of the fingerprint recognition area, i.e., the fingerprint unlocking position.

[0057] When the terminal is in a static state, in order to reduce power consumption, the photoelectric coating on the non-fingerprint recognition area of ​​the display screen is in a transparent state based on the state of the previous voltage input. To avoid the "shining" problem caused by the photoelectric coating failing to reduce its transparency synchronously when the fingerprint recognition area has entered HBM mode during the fingerprint recognition process, in this embodiment, the recognition device outputs a fourth calibration voltage to the voltage of the photoelectric coating on the non-fingerprint recognition area of ​​the display screen. The fourth calibration voltage is used to reduce the transparency of the photoelectric coating, thereby changing the transparency of the photoelectric coating on the non-fingerprint recognition area in advance. By using different transparency levels, the overall screen brightness is changed during the fingerprint recognition process, reducing adverse effects on the user's vision and improving the user experience.

[0058] Please see Figure 6 , Figure 6 The flowchart of step S3 in the fingerprint recognition method provided in the first embodiment of this application is shown below. It also includes steps S31 to S32, as follows:

[0059] S31: Unlock the terminal based on the fingerprint recognition result to obtain the terminal unlock result; if the terminal unlock result is a successful unlock result, control the fingerprint recognition area to exit HBM mode and output the first calibration voltage to the photoelectric coating on the non-fingerprint recognition area of ​​the display screen.

[0060] In this embodiment, the identification device unlocks the terminal based on the fingerprint recognition result to obtain the terminal unlock result, wherein the terminal unlock result includes a successful unlock result and a failed unlock result.

[0061] If the terminal unlocking result is successful, it indicates that the terminal is in an unlocked state. The identification device controls the fingerprint recognition area to exit HBM mode and outputs the first calibration voltage to the photoelectric coating on the non-fingerprint recognition area of ​​the display screen, so that the photoelectric coating on the non-fingerprint recognition area of ​​the display screen displays a transparent state. This can minimize the "flickering" problem caused by the photoelectric coating not being able to display transparency synchronously after the fingerprint recognition area exits HBM mode, and restore the screen to normal display.

[0062] S32: If the terminal unlocking result is an unlocking failure, determine whether a touch operation is continuously detected on the fingerprint recognition area of ​​the display screen. If the detection is successful, keep the fingerprint recognition area in HBM mode; if the detection fails, control the fingerprint recognition area to exit HBM mode, output a third calibration voltage to the photoelectric coating on the fingerprint recognition area, and output a fourth calibration voltage to the voltage of the photoelectric coating on the non-fingerprint recognition area of ​​the display screen.

[0063] In this embodiment, if the terminal unlocking result is an unlocking failure, the recognition device determines whether a touch operation is continuously detected on the fingerprint recognition area of ​​the display screen. If the detection is successful, it indicates that the terminal is still in the fingerprint recognition state. The recognition device keeps the fingerprint recognition area in HBM mode to continuously collect light reflected from the finger, thereby improving the efficiency of fingerprint recognition.

[0064] If the detection fails, it indicates that the terminal has re-entered the static state. The recognition device controls the fingerprint recognition area to exit HBM mode to reduce power consumption. The recognition device outputs a third calibration voltage to the photoelectric coating on the fingerprint recognition area, so that the photoelectric coating on the fingerprint recognition area displays the fingerprint pattern to remind the user of the fingerprint recognition area. The recognition device outputs a fourth calibration voltage to the voltage of the photoelectric coating on the non-fingerprint recognition area of ​​the display screen, so as to change the transparency of the photoelectric coating on the non-fingerprint recognition area in advance to prepare for the next fingerprint recognition.

[0065] Please see Figure 7 , Figure 7The flowchart of step S3 in the fingerprint recognition method provided in the fourth embodiment of this application is shown below. It also includes steps S33 to S34, as follows:

[0066] S33: If the photoelectric coating on the fingerprint recognition area displays a fingerprint pattern, stop outputting calibration voltage to the photoelectric coating on the fingerprint recognition area.

[0067] In this embodiment, if the photoelectric coating on the fingerprint recognition area displays a fingerprint pattern, the recognition device stops calibrating the photoelectric coating on the fingerprint recognition area. This reduces the power consumption caused by displaying a low-brightness fingerprint pattern in the fingerprint spot area after detecting that the phone has been moved or the screen has been clicked, thus reducing power consumption.

[0068] S34: If the transparency of the photoelectric coating on the non-fingerprint recognition area meets the reduction requirement, stop the calibration voltage output on the photoelectric coating on the non-fingerprint recognition area.

[0069] In this embodiment, if the transparency of the photoelectric coating on the non-fingerprint recognition area meets the reduction requirement, the recognition device stops calibrating the voltage output to the photoelectric coating on the non-fingerprint recognition area. This effectively reduces brightness without completely obscuring the screen content, thus reducing power consumption.

[0070] Please refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of a fingerprint recognition device provided in the fifth embodiment of this application. The device can implement all or part of the fingerprint recognition method through software, hardware, or a combination of both. The fingerprint recognition device 8 includes:

[0071] The instruction acquisition module 81 is used to acquire the display screen touch instruction, wherein the display screen touch instruction is generated based on the touch operation detected on the fingerprint recognition area of ​​the display screen;

[0072] The voltage calibration module 82 is used to control the fingerprint recognition area to enter HBM mode according to the touch command of the display screen, and output a first calibration voltage to the photoelectric coating on the fingerprint recognition area, wherein the fingerprint recognition area is located above the fingerprint recognition sensor; the first calibration voltage is used to make the photoelectric coating transparent.

[0073] The fingerprint recognition module 83 is used to obtain the fingerprint recognition result of the fingerprint sensor, wherein the fingerprint recognition result is obtained by the fingerprint sensor recognizing the fingerprint image collected by the fingerprint sensor based on the reflected light in the fingerprint recognition area.

[0074] In this embodiment, a display screen touch command is obtained through an instruction acquisition module. This touch command is generated based on a touch operation detected on the fingerprint recognition area of ​​the display screen. A voltage calibration module, based on the touch command, controls the fingerprint recognition area to enter HBM mode and outputs a first calibration voltage to the photoelectric coating on the fingerprint recognition area, which is located above the fingerprint sensor. The first calibration voltage is used to make the photoelectric coating transparent. The fingerprint recognition module obtains the fingerprint recognition result from the fingerprint sensor, which is obtained by recognizing the fingerprint image captured by the fingerprint sensor based on reflected light within the fingerprint recognition area. This solves the problem of excessive brightness causing flickering when the screen enters HBM mode during fingerprint recognition, ensuring fingerprint recognition accuracy while minimizing adverse visual impact on the user and improving the user experience.

[0075] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of an electronic device provided in the sixth embodiment of this application. This application also provides an electronic device, including: a processor 91, a memory 92, and a computer program 93 stored in the memory 92 and executable on the processor; the electronic device can store multiple instructions, which are applicable to being loaded by the processor and executing the method steps of the first to fourth embodiments described above. For specific execution processes, please refer to the detailed descriptions of the first to fourth embodiments, which will not be repeated here.

[0076] The processor may include one or more processing cores. The processor 91 connects to various parts within the electronic device via various interfaces and lines. It executes instructions, programs, code sets, or instruction sets stored in the memory 92, and retrieves data from the memory 92 to perform various functions and process data of the fingerprint recognition device 8. Optionally, the processor 91 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 91 may integrate one or more of the following: a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), and a modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content displayed on the touchscreen; and the modem handles wireless communication. It is understood that the modem may also be implemented as a separate chip without being integrated into the processor 91.

[0077] The memory 92 may include random access memory (RAM) or read-only memory. Optionally, the memory 92 may include a non-transitory computer-readable storage medium. The memory 92 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 92 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch instructions), instructions for implementing the various method embodiments described above, etc.; the data storage area may store data involved in the various method embodiments described above, etc. Optionally, the memory 92 may also be at least one storage device located remotely from the aforementioned processor 91.

[0078] This application also provides a storage medium that can store multiple instructions. These instructions are applicable to being loaded by a processor and executed by the method steps of the first to fourth embodiments described above. For details of the execution process, please refer to the specific descriptions of the embodiments shown in the first to fourth embodiments, which will not be repeated here.

[0079] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0080] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0081] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0082] In the embodiments provided in this application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0083] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0084] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0085] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms.

[0086] This application is not limited to the above-described embodiments. If any modifications or variations to this application do not depart from the spirit and scope of this application, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this application, then this application also intends to include such modifications and variations.

Claims

1. A fingerprint recognition method, characterized in that, The method is applied to a terminal equipped with a display screen, the upper surface of which is coated with an optoelectronic coating, a fingerprint sensor is disposed below the display screen, and the display screen also includes a screen driving circuit; the method includes the following steps: If the terminal is currently in a static state, a third calibration voltage is output to the photoelectric coating on the fingerprint recognition area of ​​the display screen, and a fourth calibration voltage is output to the photoelectric coating on the non-fingerprint recognition area of ​​the display screen. The static state indicates that the terminal is not unlocked and no touch operation is detected on the fingerprint recognition area of ​​the display screen. The third calibration voltage is used to display the fingerprint pattern set on the photoelectric coating; the fourth calibration voltage is used to reduce the transparency of the photoelectric coating; the photoelectric coating on the fingerprint recognition area has a fingerprint pattern set on it. A touch command for the display screen is obtained, wherein the touch command for the display screen is generated based on a touch operation detected on the fingerprint recognition area of ​​the display screen; the touch command for the display screen includes coordinate parameters corresponding to the touch operation; Based on the coordinate parameters corresponding to the touch operation, a fingerprint recognition area corresponding to the touch operation is determined. The screen driving circuit outputs a second calibration voltage to the pixels of the fingerprint recognition area corresponding to the touch operation, controlling the fingerprint recognition area to enter HBM mode. A first calibration voltage is then output to the photoelectric coating on the fingerprint recognition area. The second calibration voltage is used to increase the brightness of the pixels. The fingerprint recognition area is located above the fingerprint sensor. The first calibration voltage is used to make the photoelectric coating transparent. Obtain the fingerprint recognition result of the fingerprint sensor, wherein the fingerprint recognition result is obtained by the fingerprint sensor recognizing the fingerprint image collected by the fingerprint sensor based on the reflected light in the fingerprint recognition area.

2. The fingerprint recognition method according to claim 1, characterized in that: The photoelectric coating is an electrochromic coating material; The step of outputting a first calibration voltage to the photoelectric coating on the fingerprint recognition area includes the following steps: If the photoelectric coating on the fingerprint recognition area becomes transparent, stop outputting calibration voltage to the photoelectric coating on the fingerprint recognition area.

3. The fingerprint recognition method according to claim 2, characterized in that, It also includes the following steps: The terminal is unlocked based on the fingerprint recognition result to obtain the terminal unlock result; If the terminal unlocking result is a successful unlocking result, control the fingerprint recognition area to exit HBM mode, and output the first calibration voltage to the photoelectric coating on the non-fingerprint recognition area of ​​the display screen; If the terminal unlocking result is an unlocking failure, determine whether a touch operation is continuously detected on the fingerprint recognition area of ​​the display screen. If the detection is successful, keep the fingerprint recognition area in HBM mode; if the detection fails, control the fingerprint recognition area to exit HBM mode, output a third calibration voltage to the photoelectric coating on the fingerprint recognition area, and output a fourth calibration voltage to the voltage of the photoelectric coating on the non-fingerprint recognition area of ​​the display screen.

4. The fingerprint recognition method according to claim 1 or 3, characterized in that, Including the following steps: If the photoelectric coating on the fingerprint recognition area displays a fingerprint pattern, stop outputting calibration voltage to the photoelectric coating on the fingerprint recognition area; If the transparency of the photoelectric coating on the non-fingerprint recognition area meets the reduction requirement, stop the calibration voltage output to the photoelectric coating on the non-fingerprint recognition area.

5. A fingerprint recognition device for use with the fingerprint recognition method according to any one of claims 1 to 4, applied to a terminal equipped with a display screen, wherein a photoelectric coating is attached to the upper surface of the display screen, and a fingerprint sensor is disposed below the display screen, characterized in that, include: The instruction acquisition module is used to acquire display screen touch instructions, wherein the display screen touch instructions are generated based on touch operations detected on the fingerprint recognition area of ​​the display screen; A voltage calibration module is used to control the fingerprint recognition area to enter HBM mode according to the touch command of the display screen, and output a first calibration voltage to the photoelectric coating on the fingerprint recognition area, wherein the fingerprint recognition area is located above the fingerprint recognition sensor; the first calibration voltage is used to make the photoelectric coating transparent. A fingerprint recognition module is used to obtain the fingerprint recognition result of the fingerprint sensor, wherein the fingerprint recognition result is obtained by the fingerprint sensor recognizing the fingerprint image collected by the fingerprint sensor based on the reflected light in the fingerprint recognition area.

6. An electronic device, characterized in that, include: A processor, a memory, and a computer program stored in the memory and executable on the processor; the computer program, when executed by the processor, implements the steps of the fingerprint recognition method as described in any one of claims 1 to 4.

7. A storage medium, characterized in that: The storage medium stores a computer program that, when executed by a processor, implements the steps of the fingerprint recognition method as described in any one of claims 1 to 4.

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