Fingerprint recognition method and device

Abstract

Embodiments of the present disclosure provide a fingerprint identification method, device and electronic product. The fingerprint identification method provided by the embodiments of the present disclosure comprises: acquiring a touch signal of a to-be-identified finger on a display component; determining a touch area of the to-be-identified finger based on the touch signal; determining a fingerprint identification bright area and a fingerprint identification dark area on the display component based on the touch area, wherein the fingerprint identification dark area is close to and at least partially surrounds the fingerprint identification bright area; acquiring a bright area fingerprint detection signal corresponding to the fingerprint identification bright area and a dark area fingerprint detection signal corresponding to the fingerprint identification dark area; and performing fingerprint identification of the to-be-identified finger based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. The fingerprint identification method can effectively reduce interference during fingerprint identification under the display screen and improve the accuracy of fingerprint identification under the screen.

Description

Technical Field

[0001] This disclosure relates to identification technology, and more specifically, to a fingerprint identification method, apparatus, and electronic product incorporating a fingerprint identification apparatus. Background Technology

[0002] With the development of portable devices such as smartphones, the demand for personal identification is increasing. Among personal identification technologies, considering factors such as device cost, size, and accuracy, fingerprint recognition technology is currently considered one of the most promising. Fingerprint recognition technology has been widely used in various electronic products, such as mobile phones, laptops, tablets, personal digital assistants (PDAs), and portable electronic devices, to achieve identity verification. Fingerprint recognition provides a convenient way to identify users; users only need to place their finger on the fingerprint recognition panel or area to log in to electronic devices without having to enter lengthy and cumbersome usernames and passwords.

[0003] Under-display fingerprint recognition technology, currently the most popular fingerprint recognition technology, boasts advantages such as ease of use, excellent integration with electronic products, small size, and wide application range. It utilizes under-display fingerprint sensing technology, embedding a fingerprint sensor array within the display panel, placing the fingerprint sensing area within the display area. Currently, under-display fingerprint recognition requires high precision in fingerprint detection signals; signal interference can easily lead to inaccurate recognition results. Therefore, improving the accuracy of under-display fingerprint recognition remains a hot research topic. Summary of the Invention

[0004] To address the aforementioned problems, this disclosure provides a fingerprint recognition method, comprising: acquiring a touch signal of a finger to be recognized on a display component; determining a touch area of ​​the finger to be recognized based on the touch signal; determining a fingerprint recognition bright area and a fingerprint recognition dark area on the display component based on the touch area, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area; acquiring a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area and a dark area fingerprint detection signal corresponding to the fingerprint recognition dark area; and performing fingerprint recognition of the finger to be recognized based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0005] The fingerprint recognition method disclosed herein can effectively reduce interference during under-display fingerprint recognition and improve the accuracy of under-display fingerprint recognition.

[0006] According to embodiments of this disclosure, the fingerprint recognition method further includes: detecting whether the finger to be identified is a real or fake finger based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0007] According to embodiments of this disclosure, fingerprint recognition of the finger to be identified can be performed based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0008] According to embodiments of this disclosure, fingerprint recognition of the finger to be recognized can be performed based on the difference between a single fingerprint detection signal in the bright area of ​​the fingerprint recognition system and a single fingerprint detection signal in the dark area of ​​the fingerprint recognition system; alternatively, fingerprint recognition of the finger to be recognized can be performed based on the difference between a single fingerprint detection signal in the bright area of ​​the fingerprint recognition system and the average value of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition system; or alternatively, fingerprint recognition of the finger to be recognized can be performed based on the difference between the average value of multiple fingerprint detection signals in the bright area of ​​the fingerprint recognition system and the average value of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition system, wherein the average value is an arithmetic mean or a weighted average.

[0009] According to embodiments of this disclosure, the bright area fingerprint detection signal includes a first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second bright area fingerprint detection signal corresponding to the recessed portion of the fingerprint; and the dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second dark area fingerprint detection signal corresponding to the recessed portion of the fingerprint. The step of detecting whether the finger to be identified is real or fake based on the bright area fingerprint detection signal and the dark area fingerprint detection signal further includes: detecting whether the finger to be identified is real or fake based on a first difference between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the bright area of ​​the fingerprint and a second difference between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the dark area of ​​the fingerprint.

[0010] According to embodiments of this disclosure, the fingerprint recognition method further includes determining that the finger to be identified is a genuine finger under any of the following circumstances: the first difference is greater than the second difference; the difference between the first difference and the second difference is greater than a first threshold; the ratio between the first difference and the second difference is greater than a second threshold; the proportion of the difference between the first difference and the second difference to the first difference or the second difference is greater than a third threshold.

[0011] According to embodiments of this disclosure, the first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal are obtained by detecting light of a specific wavelength.

[0012] According to embodiments of this disclosure, the fingerprint recognition bright area is a circular, elliptical, or rectangular area, and the fingerprint recognition dark area includes multiple rows or columns of display pixels adjacent to a portion of the outermost display pixels of the fingerprint recognition bright area. During fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to emit light, and the display pixels in the fingerprint recognition dark area are controlled to not emit light. Alternatively, during fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to have a higher light intensity than the display pixels in the fingerprint recognition dark area.

[0013] According to an embodiment of the present disclosure, the display component includes a plurality of display zones, each display zone including a plurality of display pixels, the fingerprint recognition bright area being associated with at least one of the plurality of display zones, and the fingerprint recognition dark area being associated with at least one of the plurality of display zones.

[0014] According to embodiments of this disclosure, determining the fingerprint recognition bright area and fingerprint recognition dark area on the display component based on the touch area further includes: determining the center of the touch area; determining the fingerprint recognition bright area with the center of the touch area as the origin; and taking multiple rows or columns of display pixels adjacent to a portion of the outermost display pixels of the fingerprint recognition bright area as the fingerprint recognition dark area, wherein the area of ​​the fingerprint recognition bright area is a preset area, or the area of ​​the fingerprint recognition bright area is determined based on the area of ​​the touch area and is greater than or equal to a first area threshold.

[0015] According to embodiments of this disclosure, determining the fingerprint recognition bright area and the fingerprint recognition dark area on the display component based on the touch area further includes: determining the edge region of the touch area; determining at least a portion of the edge region as the fingerprint recognition dark area; and determining the fingerprint recognition bright area based on the fingerprint recognition dark area and the touch area.

[0016] According to an embodiment of this disclosure, the fingerprint recognition method further includes: determining the area of ​​the touch region; wherein, if the area of ​​the touch region is less than a second area threshold, the edge region of the touch region is determined based on the touch region.

[0017] Embodiments of this disclosure also provide a fingerprint recognition device arranged below a display component, comprising: a control circuit configured to acquire a touch signal of a finger to be recognized on the display component, determine a touch area of ​​the finger to be recognized based on the touch signal, and provide a light emission control signal to the display component based on the determined touch area, the light emission control signal being used to control the display component to form a fingerprint recognition bright area and a fingerprint recognition dark area, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area; the control circuit is further configured to acquire a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area and a dark area fingerprint detection signal corresponding to the fingerprint recognition dark area, and perform fingerprint recognition of the finger to be recognized based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0018] According to an embodiment of this disclosure, the fingerprint recognition device further includes: an optical sensing unit array, wherein each optical sensing unit is used to receive light reflected from the finger to be recognized and convert the light signal into an electrical signal; wherein the bright area fingerprint detection signal is an electrical signal generated by the optical sensing unit corresponding to the bright area of ​​the fingerprint recognition, and the dark area fingerprint detection signal is an electrical signal generated by the optical sensing unit corresponding to the dark area of ​​the fingerprint recognition.

[0019] Embodiments of this disclosure also provide an electronic product that uses the fingerprint recognition method described above to recognize fingerprints.

[0020] This disclosure provides a fingerprint recognition method, apparatus, and electronic product including a fingerprint recognition apparatus. The fingerprint recognition method of this disclosure effectively reduces interference during under-display fingerprint recognition, improving the accuracy of under-display fingerprint recognition. Simultaneously, the fingerprint recognition method of this disclosure can detect genuine and fake fingers with only a single fingerprint scan, improving the efficiency of genuine and fake finger detection. Furthermore, the fingerprint recognition method of this disclosure does not require significant modifications to the hardware of the electronic product, and has advantages such as good compatibility, small size, and wide application scenarios. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] In the attached image:

[0023] Figure 1 This is a schematic diagram illustrating a fingerprint recognition scenario according to an embodiment of the present disclosure;

[0024] Figures 2A-2C This is a schematic diagram illustrating an electronic product according to an embodiment of the present disclosure;

[0025] Figures 3A-3C This is a schematic diagram illustrating the fingerprint detection signal processing procedure according to an embodiment of the present disclosure;

[0026] Figures 4A-4B This is a schematic diagram illustrating the fingerprint recognition bright area and fingerprint recognition dark area according to an embodiment of the present disclosure;

[0027] Figure 5 This is a schematic diagram illustrating details of the fingerprint recognition area according to an embodiment of the present disclosure;

[0028] Figures 6A-6B This is a schematic diagram illustrating a scenario in which the fingerprint recognition bright area and the fingerprint recognition dark area are determined based on the touch area according to an embodiment of the present disclosure;

[0029] Figure 7 This is a schematic flowchart illustrating a fingerprint recognition method according to embodiments of the present disclosure; and

[0030] Figure 8 This is a schematic flowchart illustrating a fingerprint verification process according to an embodiment of the present disclosure. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this disclosure more apparent, exemplary embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments of this disclosure. It should be understood that this disclosure is not limited to the exemplary embodiments described herein.

[0032] Furthermore, in this specification and the accompanying drawings, steps and elements that are substantially the same or similar are indicated by the same or similar reference numerals, and repeated descriptions of these steps and elements will be omitted.

[0033] Furthermore, in this specification and accompanying drawings, elements are described in singular or plural forms according to embodiments. However, the singular and plural forms have been suitably chosen for the presented cases merely for ease of explanation and are not intended to limit this disclosure. Thus, a singular form may include a plural form, and a plural form may include a singular form, unless the context clearly indicates otherwise.

[0034] Furthermore, the terms "first / second" used in this specification and drawings are merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first / second" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0035] Furthermore, the terms "upper," "lower," "vertical," and "horizontal," which relate to orientation or positional relationships, are used in this specification and accompanying drawings only for the convenience of describing embodiments according to this disclosure and are not intended to limit this disclosure. Therefore, they should not be construed as limiting this disclosure.

[0036] Furthermore, in this specification and accompanying drawings, unless otherwise expressly stated, "connection" does not necessarily mean "direct connection" or "direct contact." Here, "connection" can mean both a fixing function and electrical connection.

[0037] Fingerprint recognition technology is one of many biometric identification technologies. Biometric identification technology refers to the use of inherent physiological or behavioral characteristics of the human body for personal identification. Due to its convenience and security advantages, biometric technology has broad application prospects in identity authentication and network security. Available biometric identification technologies include fingerprints, faces, voiceprints, and iris scans, among which fingerprints are the most widely used. In recent years, fingerprint recognition technology has been applied to electronic products such as smartphones, tablets, smart bracelets, wearable electronic devices, and smart access control systems, becoming a crucial foundational technology for unlocking electronic products and online payments. In the future, based on protocols such as FIDO, fingerprint recognition and other biometric identification technologies will completely replace existing password systems. The emergence and widespread adoption of optical fingerprint acquisition technology has facilitated rapid on-site fingerprint acquisition and verification. The application of fingerprint recognition technology in mobile devices has also promoted the rapid development of small-size, ultra-thin fingerprint acquisition technology.

[0038] As an example, this disclosure relates to fingerprint recognition technology, and embodiments of this disclosure will be further described below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram illustrating a fingerprint recognition scenario according to an embodiment of the present disclosure.

[0040] like Figure 1 As shown, in an under-display fingerprint recognition scenario, the finger to be detected only needs to touch the display component of the electronic product (i.e., the touch screen) to acquire and process the fingerprint detection signal through a fingerprint sensor distributed below the display component or a fingerprint sensor integrated with the display component. Optionally, after detecting the touch signal of the finger to be recognized, a portion of the display component corresponding to the touch area can be controlled to emit light based on the touch area, and then the fingerprint signal corresponding to the touch area can be acquired to achieve fingerprint recognition.

[0041] It should be understood that the electronic products mentioned in this disclosure may refer to electronic devices with touch screens, such as mobile phones, computers, and tablets.

[0042] More specifically, Figure 2A This is a schematic cross-sectional view of an electronic product according to an embodiment of the present disclosure.

[0043] like Figure 2A As shown, the electronic product may include a display component and a fingerprint recognition device, wherein the fingerprint recognition device is arranged below the display component.

[0044] A fingerprint recognition device may include a control circuit (e.g., an integrated circuit (IC) or the like) and an array of optical sensing units, wherein the control circuit is used to control the fingerprint recognition process, and each optical sensing unit is used to receive light reflected from the finger to be recognized and convert the light signal into an electrical signal.

[0045] Alternatively, the packaging of the control circuit can be achieved using chip-on-film (COF) technology to make the electronic product more miniaturized and lightweight.

[0046] Optionally, the fingerprint recognition device may also include other components, such as components for structural fixation, components for connection with other components of the electronic product, etc.

[0047] It should be understood that Figure 2A This is just one example of the structure of the display component and the fingerprint recognition device; the structure of the display component and the fingerprint recognition device can also be in other forms.

[0048] Figure 2B This is a front view of an electronic product showing a fingerprint recognition dark area located at the edge of a display component according to an embodiment of the present disclosure. For Figure 2B The electronic product shown can be configured such that its display component and fingerprint recognition device (including control circuitry and optical sensing element array) are in accordance with... Figure 2A Arranged as shown.

[0049] for Figure 2B In the example shown, the control circuit can be configured to: acquire a touch signal of a finger to be identified on the display component; determine the touch area of ​​the finger to be identified based on the touch signal; and provide a light-emitting control signal to the display component based on the determined touch area. The light-emitting control signal is used to control the display component to form a fingerprint recognition bright area. Furthermore, the control circuit can also be configured to: acquire a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area; and perform fingerprint recognition of the finger to be identified based on the bright area fingerprint detection signal. Alternatively, the control circuit can also be configured to: acquire a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area and a dark area fingerprint detection signal corresponding to a dark area fingerprint recognition area located at the edge of the display component; and perform fingerprint recognition of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. It should be noted that for... Figure 2BIn the example shown, the dark area fingerprint detection signal is only used as a reference signal when performing fingerprint recognition based on the bright area of ​​the fingerprint recognition system, and it does not contain the fingerprint information of the finger to be recognized.

[0050] for Figure 2B In the example shown, each optical sensing unit in the optical sensing unit array is used to receive light reflected from the finger to be identified and convert the light signal into an electrical signal; wherein, the bright area fingerprint detection signal is the electrical signal generated by the optical sensing unit corresponding to the bright area of ​​fingerprint recognition.

[0051] like Figure 2B As shown, the fingerprint recognition dark area is located at the edge of the display component, and its position does not change with the position of the touch area. When a touch signal of a finger to be recognized is detected, the fingerprint recognition device determines the touch area of ​​the finger to be recognized based on the touch signal, and determines the fingerprint recognition bright area on the display component based on the touch area.

[0052] Optionally, the display component may include multiple display zones (such as...) Figure 2B As shown in the middle region (1,1) to region (M,N), each display partition includes multiple display pixels, and the fingerprint recognition bright area can be associated with a display partition (e.g., as shown in the middle region (1,1) to region (M,N)). Figure 2B The fingerprint recognition bright area 1 shown in the image can also be associated with multiple display zones (e.g., as shown in the image). Figure 2B (As shown in fingerprint recognition bright area 2). When the touch area is associated with a display partition, the touch area in that display partition can be configured as the fingerprint recognition bright area; when the touch area is associated with multiple display partitions, the touch areas in the multiple display partitions can be combined to form the fingerprint recognition bright area.

[0053] During fingerprint recognition, the display pixels in the bright area of ​​the fingerprint recognition system are controlled to emit light, while the display pixels in the dark area are controlled to not emit light. According to embodiments of this disclosure, the brightness of the bright area of ​​the fingerprint recognition system can be higher than the brightness of the display component when displaying the image, and the brightness of the dark area of ​​the fingerprint recognition system can be lower than the brightness of the display component when displaying the image.

[0054] Figure 2C This is a front view of an electronic product showing that, according to an embodiment of the present disclosure, the fingerprint recognition dark area is located around the fingerprint recognition bright area. For Figure 2C The electronic product shown can be configured such that its display component and fingerprint recognition device (including control circuitry and optical sensing element array) are in accordance with... Figure 2A Arranged as shown.

[0055] Figure 2C The electronic product structure shown is similar to Figure 2BSimilar to the electronic products shown, their difference lies in that, upon detecting the touch signal of a finger to be recognized, the fingerprint recognition device determines the touch area of ​​the finger based on the touch signal, and dynamically determines the fingerprint recognition bright area and fingerprint recognition dark area on the display component based on the touch area, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area. That is, in Figure 2C In this scheme, the position of the fingerprint recognition dark area changes with the position of the touch area. The touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area.

[0056] There are several ways to determine the bright and dark areas of a fingerprint scanner.

[0057] For example, the control circuit can first determine the center of the touch area; then determine the fingerprint recognition bright area with the center of the touch area as the origin; and use multiple rows or columns of display pixels adjacent to a portion of the outermost part of the fingerprint recognition bright area as the fingerprint recognition dark area, wherein the area of ​​the fingerprint recognition bright area is a preset area (e.g., the average size of the contact area of ​​the finger to be recognized), or the area of ​​the fingerprint recognition bright area is determined based on the area of ​​the touch area and is greater than or equal to a first area threshold (e.g., the average size of the contact area of ​​an infant's finger).

[0058] For example, the control circuit can first determine the edge region of the touch area; then determine at least a portion of the edge region as the fingerprint recognition dark area; and then determine the fingerprint recognition bright area based on the fingerprint recognition dark area and the touch area. Similarly, the area of ​​the fingerprint recognition bright area can also be a preset area, or the area of ​​the fingerprint recognition bright area can be determined based on the area of ​​the touch area and is greater than or equal to a first area threshold.

[0059] for Figure 2C In the example shown, the control circuit can be configured to: acquire a touch signal of a finger to be identified on the display component; determine the touch area of ​​the finger to be identified based on the touch signal; and provide a light-emitting control signal to the display component based on the determined touch area. This light-emitting control signal is used to control the display component to form a fingerprint recognition bright area and a fingerprint recognition dark area, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area. Furthermore, the control circuit can also be configured to: acquire a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area, and perform fingerprint recognition of the finger to be identified based on the bright area fingerprint detection signal; or, the control circuit can also be configured to: acquire a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area and a dark area fingerprint detection signal corresponding to the fingerprint recognition dark area, and perform fingerprint recognition of the finger to be identified based on the bright area fingerprint detection signal and the dark area fingerprint detection signal. It should be noted that for... Figure 2CIn the example shown, the fingerprint recognition dark area is close to the fingerprint recognition bright area, and both the dark area fingerprint detection signal and the bright area fingerprint detection signal contain the fingerprint information of the finger to be identified.

[0060] During fingerprint recognition, the display pixels in the bright area of ​​the fingerprint recognition system are controlled to emit light, while the display pixels in the dark area are controlled to not emit light. Alternatively, during fingerprint recognition, the display pixels in the bright area are controlled to have a higher light intensity than the display pixels in the dark area. According to embodiments of this disclosure, the brightness of the bright area of ​​the fingerprint recognition system can be higher than the brightness of the display component when displaying the image, and the brightness of the dark area can be lower than the brightness of the display component when displaying the image.

[0061] for Figure 2C In the example shown, each optical sensing unit in the optical sensing unit array is used to receive light reflected from the finger to be identified and convert the light signal into an electrical signal; wherein, the bright area fingerprint detection signal is the electrical signal generated by the optical sensing unit corresponding to the bright area of ​​fingerprint recognition, and the dark area fingerprint detection signal is the electrical signal generated by the optical sensing unit corresponding to the dark area of ​​fingerprint recognition.

[0062] Optionally, the display component includes multiple display zones (such as...). Figure 2C In the case of regions (1,1) to (M,N) shown in the middle region, the fingerprint recognition bright area can be associated with a display partition (e.g., as shown in the middle region (1,1) to (M,N)). Figure 2C The fingerprint recognition bright area 1 shown in the image can also be associated with multiple display zones (e.g., as shown in the image). Figure 2C (As shown in fingerprint recognition bright area 2). When the touch area is associated with a display partition, the touch area in that display partition can be configured as the fingerprint recognition bright area; when the touch area is associated with multiple display partitions, the touch areas in the multiple display partitions can be combined to form the fingerprint recognition bright area.

[0063] Similarly, the fingerprint recognition dark area can be associated with a display partition (e.g., as shown in the image). Figure 2C As shown in fingerprint recognition dark area 1), it can also be associated with multiple display partitions (e.g., such as...). Figure 2C (As shown in fingerprint recognition dark area 2). When the touch area is associated with a display partition, the area in the display partition that is close to and at least partially surrounds the fingerprint recognition bright area can be configured as the fingerprint recognition dark area; when the touch area is associated with multiple display partitions, the areas in the multiple display partitions that are close to and at least partially surround the fingerprint recognition bright area can be combined to form the fingerprint recognition dark area.

[0064] It should be understood that, despite Figure 2CThe present disclosure is not limited to the case where the fingerprint recognition dark area is drawn to completely surround the fingerprint recognition bright area. The fingerprint recognition dark area may not completely surround the fingerprint recognition bright area, as long as the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area.

[0065] for Figure 2C For example, since both the dark area fingerprint detection signal and the bright area fingerprint detection signal contain fingerprint information of the finger to be identified, the fingerprint recognition device can simultaneously acquire two different fingerprint information. Figure 2C The fingerprint recognition device can also detect whether the finger to be recognized is real or fake based on bright area fingerprint detection signals and dark area fingerprint detection signals. Specifically, the bright area fingerprint detection signals include a first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second bright area fingerprint detection signal corresponding to the recessed portion of the fingerprint; the dark area fingerprint detection signals include a first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second dark area fingerprint detection signal corresponding to the recessed portion of the fingerprint; the control circuit can detect whether the finger to be recognized is real or fake based on a first difference between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the bright area of ​​the fingerprint recognition and a second difference between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the dark area of ​​the fingerprint recognition.

[0066] Since the fingerprint recognition method disclosed herein directly utilizes the fingerprint sensor under the display component and controls the transistor of the display component without adding new modules to the electronic product, it has advantages such as good compatibility, small size, and wide application scenarios.

[0067] Figure 3A This illustrates an embodiment of the present disclosure for... Figure 2B The diagram shows the fingerprint detection signal processing process of an electronic product.

[0068] Typically, fingerprint recognition devices can directly identify the fingerprint of the finger to be recognized based on the fingerprint detection signal of the bright area. However, with this method, the fingerprint recognition process is susceptible to noise, resulting in inaccurate fingerprint recognition results.

[0069] Preferably, such as Figure 3A As shown, fingerprint recognition of the finger to be identified can be performed based on the difference between the fingerprint detection signal in the bright area and the fingerprint detection signal in the dark area.

[0070] from Figure 3A It can be seen that the noise level may be related to the location on the display component. This is achieved by analyzing the fingerprint detection signal in the bright area (from...). Figure 3A The signal obtained from the bright area fingerprint sensor (shown in the white box) and the dark area fingerprint detection signal (from...) Figure 3AThe difference between the signals obtained from the dark area fingerprint sensor (shown in the gray box) is calculated and then provided to the analog front-end (AFE) and / or analog-to-digital converter (ADC) for further fingerprint recognition. This effectively reduces noise interference and improves the accuracy of fingerprint recognition. Typically, to increase the correlation between the bright area fingerprint detection signal and the dark area fingerprint detection signal, the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal of the same row of bright area fingerprint sensors is used for fingerprint recognition.

[0071] Figures 3B-3C This illustrates an embodiment of the present disclosure for... Figure 2C The diagram shows the fingerprint detection signal processing process of an electronic product.

[0072] like Figure 3B As shown, fingerprint detection signals in bright areas (from...) Figure 3B The signal obtained from the bright area fingerprint sensor (shown in the white box) and the dark area fingerprint detection signal (from...) Figure 3B The difference between the signal obtained by the fingerprint sensor in the dark area (shown in the gray box) is calculated and then provided to the analog front-end (AFE) and / or analog-to-digital converter (ADC) for further fingerprint recognition of the finger to be identified.

[0073] Due to Figure 2B In electronic products, the fingerprint recognition dark area is located at the edge of the display component, and its position does not change with the position of the touch area. Figure 2C In electronic products, the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area, and its position changes with the position of the touch area. Therefore, compared to... Figure 2B The plan, Figure 2C In the proposed scheme, the correlation between the bright area fingerprint detection signal and the dark area fingerprint detection signal is higher. Under the fingerprint recognition method based on the difference between the bright area and dark area fingerprint detection signals, Figure 2C The proposed solution offers better noise reduction and higher fingerprint recognition accuracy.

[0074] Optionally, noise suppression can be related only to the bright and dark areas of the fingerprint. For example, the bright and dark areas of the fingerprint can be divided into left and right parts, and then fingerprint recognition of the finger to be identified can be performed based on the difference between the fingerprint detection signal of the left bright area and the fingerprint detection signal of the left dark area (e.g., as shown in the image). Figure 3B (As shown); Based on the difference between the fingerprint detection signal in the bright area on the right and the fingerprint detection signal in the dark area on the right, fingerprint recognition of the finger to be identified is performed (e.g., as shown). Figure 3C(As shown). Similarly, the fingerprint's bright and dark areas can be divided into upper and lower parts, and then the bright and dark parts can be used for fingerprint recognition, and so on. The specific division method is not limited to dividing equally; there can be multiple methods.

[0075] Optionally, fingerprint recognition can be performed based on the difference between a single fingerprint detection signal in the bright area and a single fingerprint detection signal in the dark area; or, based on the difference between a single fingerprint detection signal in the bright area and the average of multiple fingerprint detection signals in the dark area; or based on the difference between the average of multiple fingerprint detection signals in the bright area and the average of multiple fingerprint detection signals in the dark area. It should be noted that the average value here can be an arithmetic mean, a weighted average, etc.

[0076] It should be understood that, according to embodiments of this disclosure, Figures 3A-3C In the example, fingerprint recognition of the finger to be identified is based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal as an example rather than a limitation. In fact, fingerprint recognition of the finger to be identified can also be based on functions related to the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0077] Furthermore, the light source in the fingerprint recognition area can take many forms. For example, Figure 4A This is a schematic diagram showing the fingerprint recognition bright area and the fingerprint recognition dark area when the fingerprint recognition bright area is a light spot with uniform light intensity according to an embodiment of the present disclosure. Figure 4B This is a schematic diagram illustrating the fingerprint recognition bright area and the fingerprint recognition dark area when the fingerprint recognition bright area is a spot of non-uniform light intensity according to an embodiment of the present disclosure. In order to make the fingerprint detection signal of the bright area highly correlated with the fingerprint detection signal of the dark area, the fingerprint of the finger to be identified can be recognized based on the difference between the fingerprint detection signal of the bright area and the fingerprint detection signal of the dark area of ​​the fingerprint recognition of adjacent or close fingerprint sensors.

[0078] Furthermore, Figure 5 This illustrates an embodiment of the present disclosure for... Figure 2C A schematic diagram showing details of the fingerprint recognition area on an electronic product.

[0079] According to embodiments of this disclosure, the fingerprint recognition bright area can be a circular, elliptical, or rectangular area, etc., and the fingerprint recognition dark area includes multiple rows or columns of display pixels adjacent to a portion of the outermost display pixels of the fingerprint recognition bright area. Both the fingerprint recognition bright area and the fingerprint recognition dark area correspond to multiple fingerprint sensors, which can be arranged in an array.

[0080] Furthermore, the display component may include multiple thin-film transistor (TFT) pixels, and the multiple TFT pixels and multiple fingerprint sensors may be staggered. For example, the multiple TFTs and multiple fingerprint sensors may be located on the same plane and arranged in an array, or the multiple TFTs and multiple fingerprint sensors may be located on two different planes, one above the other, and arranged in an array.

[0081] According to embodiments of this disclosure, the width of the fingerprint recognition dark area can also be set to be no less than 100 micrometers to reduce the influence of stray light on the measurement results of the sensor in the fingerprint recognition dark area.

[0082] Figures 6A-6B This is a schematic diagram illustrating a scenario in which a bright area and a dark area for fingerprint recognition are determined based on a touch area according to an embodiment of the present disclosure.

[0083] like Figure 6A As shown, the bright area for fingerprint recognition can be a circular region, and the dark area for fingerprint recognition can be a ring-shaped region that is close to and surrounds the bright area. From Figure 6A It can be seen that when the finger to be identified touches the display component from one side, only the bright area fingerprint detection signal of the fingerprint recognition bright area and the dark area fingerprint detection signal of the fingerprint recognition dark area under the finger actually contain useful fingerprint information. Therefore, as Figure 6B As shown, the dark area for fingerprint recognition can also be an arc-shaped area that is close to and at least partially surrounds the bright area for fingerprint recognition.

[0084] Specifically, according to embodiments of this disclosure, the process of determining the fingerprint recognition bright area and the fingerprint recognition dark area on the display component based on the touch area can be implemented in the following way: First, determine the center of the touch area; then, determine the fingerprint recognition bright area with the center of the touch area as the origin; next, take the multiple rows or columns of display pixels adjacent to a portion of the outermost part of the fingerprint recognition bright area as the fingerprint recognition dark area, wherein the area of ​​the fingerprint recognition bright area is a preset area, or the area of ​​the fingerprint recognition bright area is determined based on the area of ​​the touch area and is greater than or equal to a first area threshold.

[0085] According to embodiments of this disclosure, the process of determining the fingerprint recognition bright area and the fingerprint recognition dark area on the display component based on the touch area can also be implemented in the following manner: First, determine the edge area of ​​the touch area; then, determine at least a portion of the edge area as the fingerprint recognition dark area; then, determine the fingerprint recognition bright area based on the fingerprint recognition dark area and the touch area.

[0086] According to embodiments of this disclosure, the area of ​​the touch area can be determined first; then, if the area of ​​the touch area is less than a second area threshold, the edge area of ​​the touch area is determined based on the touch area; then, at least a portion of the edge area is determined as the fingerprint recognition dark area; finally, the fingerprint recognition bright area is determined based on the fingerprint recognition dark area and the touch area.

[0087] Figure 7 This is a schematic flowchart 700 illustrating a fingerprint recognition method according to an embodiment of the present disclosure.

[0088] In step S701, the touch signal of the finger to be identified on the display component is acquired.

[0089] It should be understood that the touch signal of the finger to be identified can be acquired through various touch sensing technologies. For example, a touch sensing sensor located under the display component, or a touch sensing sensor integrated into the display component, can be used.

[0090] In step S702, the touch area of ​​the finger to be identified is determined based on the touch signal.

[0091] Optionally, when the display component includes multiple display zones, the touch area of ​​the finger to be identified can be associated with at least one of the multiple display zones.

[0092] In step S703, based on the touch area, a fingerprint recognition bright area and a fingerprint recognition dark area on the display component are determined, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area.

[0093] According to embodiments of this disclosure, the fingerprint recognition bright area can be a circular, elliptical, or rectangular area corresponding to the touch area, and the fingerprint recognition dark area can include multiple rows or columns of display pixels adjacent to a portion of the outermost display pixels of the fingerprint recognition bright area. During fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to emit light, and the display pixels in the fingerprint recognition dark area are controlled to not emit light. Alternatively, during fingerprint recognition, the display pixels in the fingerprint recognition bright area are controlled to have a higher light intensity than the display pixels in the fingerprint recognition dark area.

[0094] According to embodiments of this disclosure, the display component may further include a plurality of display zones, each display zone including a plurality of display pixels, the fingerprint recognition bright area being associated with at least one of the plurality of display zones, and the fingerprint recognition dark area being associated with at least one of the plurality of display zones.

[0095] According to embodiments of this disclosure, there are various ways to determine the fingerprint recognition bright area and the fingerprint recognition dark area on the display component based on the touch area.

[0096] For example, the center of the touch area can be determined; then, the fingerprint recognition bright area can be determined with the center of the touch area as the origin; and multiple rows or columns of display pixels adjacent to a portion of the outermost display pixels of the fingerprint recognition bright area can be used as the fingerprint recognition dark area. The area of ​​the fingerprint recognition bright area is a preset area, or the area of ​​the fingerprint recognition bright area is determined based on the area of ​​the touch area and is greater than or equal to a first area threshold. The touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area.

[0097] Optionally, an edge region of the touch area can be determined; then at least a portion of the edge region can be determined as the fingerprint recognition dark area; and based on the fingerprint recognition dark area and the touch area, the fingerprint recognition bright area can be determined. The touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area.

[0098] Optionally, the area of ​​the touch area can also be determined; wherein, if the area of ​​the touch area is less than a second area threshold, the edge area of ​​the touch area is determined based on the touch area, and then at least a portion of the edge area is determined as the fingerprint recognition dark area.

[0099] In step S704, the bright area fingerprint detection signal corresponding to the bright area of ​​the fingerprint recognition and the dark area fingerprint detection signal corresponding to the dark area of ​​the fingerprint recognition are obtained.

[0100] It should be understood that the sensor used to acquire the fingerprint detection signal in step S704 can be the same as or different from the touch sensing sensor in step S701. Optionally, an AFE module such as a filtering module or a signal amplifier module can be used to process the fingerprint detection signal.

[0101] In step S705, fingerprint recognition of the finger to be identified is performed based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0102] According to embodiments of this disclosure, fingerprint recognition of the finger to be identified can be performed based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal, thereby improving the accuracy of under-display fingerprint recognition.

[0103] Optionally, fingerprint recognition of the finger to be identified can be performed based on the difference between a single fingerprint detection signal in the bright area of ​​the fingerprint recognition and a single fingerprint detection signal in the dark area of ​​the fingerprint recognition; or, fingerprint recognition of the finger to be identified can be performed based on the difference between a single fingerprint detection signal in the bright area of ​​the fingerprint recognition and the average of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition; or, fingerprint recognition of the finger to be identified can be performed based on the difference between the average of multiple fingerprint detection signals in the bright area of ​​the fingerprint recognition and the average of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition, wherein the average value can be an arithmetic mean or a weighted average.

[0104] According to embodiments of this disclosure, the detection of whether a finger is real or fake can be performed simultaneously based on the bright area fingerprint detection signal and the dark area fingerprint detection signal, thereby improving the efficiency of real and fake finger detection.

[0105] Optionally, the bright area fingerprint detection signal may include a first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second bright area fingerprint detection signal corresponding to the recessed portion of the fingerprint, and the dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second dark area fingerprint detection signal corresponding to the recessed portion of the fingerprint. Therefore, the authenticity of the finger to be identified can be detected based on a first difference between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the bright area of ​​the fingerprint recognition, and a second difference between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the dark area of ​​the fingerprint recognition.

[0106] Optionally, if the first difference is greater than the second difference, the finger to be identified can be determined to be a genuine finger. Optionally, if the ratio of the first difference to the second difference is greater than 1, the finger to be identified can also be determined to be a genuine finger.

[0107] For example, the bright area fingerprint detection signal may include a first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint. And the fingerprint detection signal in the second bright area corresponding to the concave portion of the fingerprint. The dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint. And the fingerprint detection signal in the second dark area corresponding to the indented portion of the fingerprint. exist In this case, it can be determined that the finger to be identified is a genuine finger.

[0108] Optionally, at the first difference The difference with the second If the difference between the two values ​​is greater than a first threshold, the finger to be identified can be determined to be a genuine finger. Alternatively, if the difference between the two values ​​is greater than the first threshold, the finger to be identified can be determined to be a genuine finger. The difference with the second If the ratio between the two values ​​is greater than the second threshold, the finger to be identified can be determined to be a genuine finger. Alternatively, if the ratio between the two values ​​is greater than the first threshold, the finger to be identified can be determined to be a genuine finger. The difference with the second The difference between them accounts for the first difference Or the second difference If the proportion is greater than the third threshold, the finger to be identified can be determined to be a real finger.

[0109] Optionally, the first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal can be obtained by detecting light of a specific wavelength (e.g., monochromatic light such as red or blue light). Alternatively, the first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal can be obtained by detecting multiple types of light (e.g., polychromatic light such as white light, or light within a specific wavelength range).

[0110] Traditional fingerprint detection typically requires multiple scans of the finger under different lighting conditions or at different locations. However, this disclosure effectively utilizes the bright and dark areas of the fingerprint recognition system corresponding to the touch area, enabling fingerprint detection with a single scan. This improves efficiency and enhances user experience. Furthermore, this fingerprint recognition method achieves accurate fingerprint identification and fingerprint verification with a single scan, effectively improving upon existing fingerprint recognition methods.

[0111] Figure 8 This is a schematic flowchart illustrating a fingerprint verification process according to an embodiment of the present disclosure.

[0112] like Figure 8 As shown, during the fingerprint verification process, electronic products can determine the touch area of ​​the finger to be identified through the fingerprint recognition device, and then determine the fingerprint recognition bright area and fingerprint recognition dark area on the display component based on the touch area. Then, the fingerprint recognition bright area and fingerprint recognition dark area are used to perform fingerprint recognition and detection of real and fake fingers.

[0113] For example, a fingerprint recognition device can perform fingerprint recognition on the finger to be identified based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal, thereby reducing interference during fingerprint recognition and improving the accuracy of under-display fingerprint recognition. Simultaneously, the fingerprint recognition device can utilize the first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint, the second bright area fingerprint detection signal corresponding to the recessed portion of the fingerprint, the first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint, and the second dark area fingerprint detection signal corresponding to the recessed portion of the fingerprint to achieve the detection of whether the finger is real or fake. Since fingerprint recognition and real / fake finger detection can be achieved with only one scan of the finger to be identified, the fingerprint signal processing efficiency is significantly improved.

[0114] If the electronic product determines that the finger to be identified is not a real finger, it can determine that the fingerprint verification has failed and then prevent the user from unlocking the electronic product, logging in, making fingerprint payments, and other operations.

[0115] If the finger to be identified is determined to be genuine, the system can further determine whether the identified fingerprint image matches a previously stored fingerprint image to verify the user's identity. It should be understood that the process of determining whether the identified fingerprint image matches a previously stored fingerprint image can be handled directly by the electronic product, or the electronic product can send the identified fingerprint image to a network server, which will then process it and return the determination result to the electronic product.

[0116] Next, if the detected fingerprint image does not match the previously stored fingerprint image, the electronic product can determine that the fingerprint verification has failed and then prevent the user from unlocking, logging in, or making fingerprint payments on the electronic product.

[0117] If the detected fingerprint image matches a previously stored fingerprint image, the electronic product can determine that the fingerprint verification is successful and then allow the user to perform operations such as unlocking the electronic product, logging in, and fingerprint payment.

[0118] Therefore, this disclosure provides a fingerprint recognition method, an apparatus, and an electronic product including a fingerprint recognition apparatus.

[0119] According to an embodiment of this disclosure, the fingerprint recognition method includes: acquiring a touch signal of a finger to be recognized on a display component; determining a touch area of ​​the finger to be recognized based on the touch signal; determining a fingerprint recognition bright area and a fingerprint recognition dark area on the display component based on the touch area, wherein the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area; acquiring a bright area fingerprint detection signal corresponding to the fingerprint recognition bright area and a dark area fingerprint detection signal corresponding to the fingerprint recognition dark area; and performing fingerprint recognition of the finger to be recognized based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.

[0120] The fingerprint recognition method disclosed herein effectively reduces interference during under-display fingerprint recognition, improving its accuracy. Furthermore, this method can detect genuine and fake fingers with a single fingerprint scan, increasing the efficiency of this detection. Moreover, the fingerprint recognition method does not require significant modifications to the hardware of electronic products, offering advantages such as good compatibility, small size, and wide applicability.

[0121] This disclosure uses specific terms to describe embodiments of the present disclosure. Terms such as "first / second embodiment," "an embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the present disclosure. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the present disclosure can be appropriately combined.

[0122] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in a common dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0123] The foregoing description is illustrative of the present disclosure and should not be construed as limiting it. Although several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications can be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the claims. It should be understood that the foregoing description is illustrative of the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present disclosure is defined by the claims and their equivalents.

Claims

1. A fingerprint recognition method, comprising: Acquire the touch signal of the finger to be identified on the display component; Based on the touch signal, the touch area of ​​the finger to be identified is determined; Based on the touch area, a fingerprint recognition bright area and a fingerprint recognition dark area on the display component corresponding to the touch area are determined, wherein the touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area, or the touch area covers at least a portion of the fingerprint recognition bright area, the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area, the brightness of the fingerprint recognition bright area is higher than the brightness of the display component when displaying the image, and the brightness of the fingerprint recognition dark area is lower than the brightness of the display component when displaying the image; The fingerprint recognition bright area and the fingerprint recognition dark area are formed on the display component; Acquire the bright area fingerprint detection signal corresponding to the bright area of ​​the fingerprint recognition, and the dark area fingerprint detection signal corresponding to the dark area of ​​the fingerprint recognition; and Based on the bright area fingerprint detection signal and the dark area fingerprint detection signal, fingerprint recognition and real / fake finger detection of the finger to be identified are performed.

2. The fingerprint recognition method as described in claim 1, wherein, Based on the bright area fingerprint detection signal and the dark area fingerprint detection signal, the fingerprint recognition and real / fake finger detection of the finger to be identified includes: The fingerprint of the finger to be identified is determined based on the difference between the fingerprint detection signal in the bright area and the fingerprint detection signal in the dark area.

3. The fingerprint recognition method as described in claim 2, wherein, Fingerprint recognition of the finger to be identified based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal includes: Fingerprint recognition of the finger to be identified is performed based on the difference between a single fingerprint detection signal in the bright area and a single fingerprint detection signal in the dark area; or, Fingerprint recognition of the finger to be identified is performed based on the difference between the average value of a single fingerprint detection signal in the bright area of ​​the fingerprint recognition system and the average value of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition system; or, The fingerprint of the finger to be identified is determined based on the difference between the average value of multiple fingerprint detection signals in the bright area of ​​the fingerprint recognition system and the average value of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition system. The average value is an arithmetic mean or a weighted average.

4. The fingerprint recognition method as described in claim 1, wherein, The bright area fingerprint detection signal includes a first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint, and a second bright area fingerprint detection signal corresponding to the recessed portion of the fingerprint. The dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second dark area fingerprint detection signal corresponding to the recessed portion of the fingerprint. The step of performing fingerprint recognition and real / fake finger detection based on the bright area fingerprint detection signal and the dark area fingerprint detection signal includes: Based on the first difference between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the fingerprint recognition bright area, and the second difference between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the fingerprint recognition dark area, the detection of the real or fake finger of the finger to be identified is performed.

5. The fingerprint recognition method as described in claim 4, further comprising: The finger to be identified is determined to be a genuine finger under any of the following circumstances: The first difference is greater than the second difference; The difference between the first difference and the second difference is greater than the first threshold; The ratio between the first difference and the second difference is greater than the second threshold; The proportion of the difference between the first difference and the second difference to the first difference or the second difference is greater than the third threshold.

6. The fingerprint recognition method as described in claim 4, wherein, The first bright area fingerprint detection signal, the second bright area fingerprint detection signal, the first dark area fingerprint detection signal, and the second dark area fingerprint detection signal are obtained by detecting light of a specific wavelength.

7. The fingerprint recognition method as described in claim 1, wherein, The fingerprint recognition bright area is a circular, elliptical, or rectangular region, and the fingerprint recognition dark area includes multiple rows or columns of display pixels adjacent to the outermost portion of the display pixels of the fingerprint recognition bright area. During fingerprint recognition, the display pixels in the bright area of ​​the fingerprint recognition system are controlled to emit light, while the display pixels in the dark area of ​​the fingerprint recognition system are controlled to not emit light, or... During fingerprint recognition, the display pixels in the bright area of ​​the fingerprint recognition are controlled so that their light intensity is higher than that of the display pixels in the dark area of ​​the fingerprint recognition.

8. The fingerprint recognition method as described in claim 1, wherein, The display component includes multiple display zones, each display zone including multiple display pixels. The fingerprint recognition bright area is associated with at least one of the multiple display zones, and the fingerprint recognition dark area is associated with at least one of the multiple display zones.

9. The fingerprint recognition method as described in claim 1, wherein, The step of determining the fingerprint recognition bright area and the fingerprint recognition dark area on the display component corresponding to the touch area based on the touch area further includes: Determine the center of the touch area; The fingerprint recognition bright area is determined with the center of the touch area as the origin; and The multiple rows or columns of display pixels adjacent to a portion of the outermost bright area of ​​the fingerprint recognition area are used as the dark area of ​​the fingerprint recognition area. The area of ​​the fingerprint recognition bright area is a preset area, or the area of ​​the fingerprint recognition bright area is determined based on the area of ​​the touch area and is greater than or equal to a first area threshold.

10. The fingerprint recognition method as described in claim 1, wherein, The step of determining the fingerprint recognition bright area and the fingerprint recognition dark area on the display component corresponding to the touch area based on the touch area further includes: Determine the edge region of the touch area; At least a portion of the edge region is defined as the fingerprint recognition dark area; and The fingerprint recognition bright area is determined based on the fingerprint recognition dark area and the touch area.

11. The fingerprint recognition method as described in claim 10, wherein, Also includes: Determine the area of ​​the touch region; Wherein, if the area of ​​the touch area is less than the second area threshold, the edge area of ​​the touch area is determined based on the touch area.

12. A fingerprint recognition device, disposed below a display component, comprising: A control circuit is configured to acquire a touch signal of a finger to be identified on the display component, determine a touch area of ​​the finger to be identified based on the touch signal, and provide a light emission control signal to the display component based on the determined touch area. The light emission control signal is used to control the display component to form a fingerprint recognition bright area and a fingerprint recognition dark area corresponding to the touch area. The touch area covers at least a portion of the fingerprint recognition bright area and at least a portion of the fingerprint recognition dark area, or the touch area covers at least a portion of the fingerprint recognition bright area, the fingerprint recognition dark area is close to and at least partially surrounds the fingerprint recognition bright area, the brightness of the fingerprint recognition bright area is higher than the brightness of the display component when displaying an image, and the brightness of the fingerprint recognition dark area is lower than the brightness of the display component when displaying an image. The control circuit is further configured to acquire a bright area fingerprint detection signal corresponding to the bright area of ​​the fingerprint recognition and a dark area fingerprint detection signal corresponding to the dark area of ​​the fingerprint recognition, and to perform fingerprint recognition and real / fake finger detection of the finger to be recognized based on the bright area fingerprint detection signal and the dark area fingerprint detection signal.

13. The fingerprint recognition device as claimed in claim 12, further comprising: An array of optical sensing units, wherein each optical sensing unit is used to receive light reflected from the finger to be identified and convert the light signal into an electrical signal; Wherein, the bright area fingerprint detection signal is an electrical signal generated by the optical sensing unit corresponding to the bright area of ​​the fingerprint recognition, and the dark area fingerprint detection signal is an electrical signal generated by the optical sensing unit corresponding to the dark area of ​​the fingerprint recognition.

14. The fingerprint recognition device as claimed in claim 12, wherein, The control circuit performs fingerprint recognition of the finger to be identified based on the difference between the bright area fingerprint detection signal and the dark area fingerprint detection signal.

15. The fingerprint recognition device as claimed in claim 14, wherein, The control circuit performs fingerprint recognition of the finger to be recognized based on the difference between a single fingerprint detection signal in the bright area of ​​the fingerprint recognition and a single fingerprint detection signal in the dark area of ​​the fingerprint recognition. or, The control circuit performs fingerprint recognition of the finger to be identified based on the difference between the average value of a single fingerprint detection signal in the bright area of ​​the fingerprint recognition system and the average value of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition system; or, The control circuit performs fingerprint recognition of the finger to be identified based on the difference between the average value of multiple fingerprint detection signals in the bright area of ​​the fingerprint recognition and the average value of multiple fingerprint detection signals in the dark area of ​​the fingerprint recognition. The average value is an arithmetic mean or a weighted average.

16. The fingerprint recognition device as claimed in claim 12, wherein, The bright area fingerprint detection signal includes a first bright area fingerprint detection signal corresponding to the raised portion of the fingerprint, and a second bright area fingerprint detection signal corresponding to the recessed portion of the fingerprint. The dark area fingerprint detection signal includes a first dark area fingerprint detection signal corresponding to the raised portion of the fingerprint and a second dark area fingerprint detection signal corresponding to the recessed portion of the fingerprint. The control circuit performs fingerprint detection on the finger to be identified based on a first difference between the first bright area fingerprint detection signal and the second bright area fingerprint detection signal corresponding to the fingerprint recognition bright area, and a second difference between the first dark area fingerprint detection signal and the second dark area fingerprint detection signal corresponding to the fingerprint recognition dark area.

17. The fingerprint recognition device as claimed in claim 12, wherein, The fingerprint recognition bright area is a circular, elliptical, or rectangular area, and the fingerprint recognition dark area includes multiple rows or columns of display pixels adjacent to the outermost portion of the display pixels of the fingerprint recognition bright area. The width of the fingerprint recognition dark area is not less than 100 micrometers. During fingerprint recognition, the display pixels in the bright area of ​​the fingerprint recognition system are controlled to emit light, while the display pixels in the dark area of ​​the fingerprint recognition system are controlled to not emit light, or... During fingerprint recognition, the display pixels in the bright area of ​​the fingerprint recognition are controlled so that their light intensity is higher than that of the display pixels in the dark area of ​​the fingerprint recognition.

18. The fingerprint recognition device as claimed in claim 12, wherein, The display component includes multiple display zones, each display zone including multiple pixels. The fingerprint recognition bright area is associated with at least one of the multiple display zones, and the fingerprint recognition dark area is associated with at least one of the multiple display zones.

19. The fingerprint recognition device as claimed in claim 12, wherein, The control circuit is further configured to: Determine the center of the touch area; The fingerprint recognition bright area is determined with the center of the touch area as the origin; and The multiple rows or columns of display pixels adjacent to a portion of the outermost bright area of ​​the fingerprint recognition area are used as the dark area of ​​the fingerprint recognition area. The area of ​​the fingerprint recognition bright area is a preset area, or the area of ​​the fingerprint recognition bright area is determined based on the area of ​​the touch area and is greater than or equal to a first area threshold.

20. The fingerprint recognition device as claimed in claim 12, wherein, The control circuit is further configured to: Determine the edge region of the touch area; At least a portion of the edge region is defined as the fingerprint recognition dark area; and The fingerprint recognition bright area is determined based on the fingerprint recognition dark area and the touch area.

21. An electronic product comprising: Display components; as well as The fingerprint recognition device as described in any one of claims 12-20, wherein the fingerprint recognition device is disposed below the display component.

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