Fingerprint Recognition Module, Display Device, Electronic Device and Fingerprint Recognition Method

Abstract

The present application provides a fingerprint recognition module, a display device, an electronic device, and a fingerprint recognition method, which relate to the technical field of display devices and can realize the acquisition and recognition of fingerprint patterns and the identification and judgment of the authenticity of fingerprint carriers through optical fingerprint recognition technology. It includes a first optical structure layer, a second optical structure layer, and a photosensitive sensor array arranged in sequence. The first optical structure layer includes a light-transmitting area and a light-guiding area. The light-transmitting area is used to pass the first reflected light reflected by the fingerprint, and the light-guiding area is used to pass the second reflected light reflected by the fingerprint and guide the second reflected light to the second optical structure layer; the photosensitive sensor array receives and processes the first reflected light and the second reflected light passing through the second optical structure layer to generate a fingerprint recognition light-sensing signal.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a fingerprint recognition module, a display device, an electronic device, and a fingerprint recognition method. Background Art

[0002] As a convenient biometric identification feature, under-screen fingerprint recognition is widely used in mobile devices and electronic devices such as mobile phones and tablets. As the demand for fingerprint unlocking increases and its application in electronic devices becomes more widespread, the accuracy of fingerprint recognition and the speed at which electronic devices can recognize fingerprint information are also increasing.

[0003] In the existing technology, the fingerprint recognition method used on display devices such as mobile phones and tablets is mainly optical fingerprint recognition. Usually, the fingerprint is illuminated and reflected by a light source in the display module, and the reflected light of the fingerprint carrying specific biometric information is received, recorded or analyzed by an optical detection device to achieve the function of recording the fingerprint or identifying a specific fingerprint.

[0004] For electronic device security, distinguishing between genuine and fake fingerprints has become a crucial criterion for device manufacturers to demonstrate their recognition capabilities. For example, accurately distinguishing between a real finger and a flat piece of paper with fingerprints printed on it enhances fingerprint recognition security in the event that personal information is compromised. Currently, mass-produced fingerprint recognition modules using optical fingerprint recognition technology are unable to distinguish between genuine and fake fingerprints. Summary of the Invention

[0005] The purpose of this application is to provide a fingerprint recognition module, a display device, an electronic device and a fingerprint recognition method, which can realize the acquisition and recognition of fingerprint patterns and the identification and judgment of the authenticity of fingerprint carriers through optical fingerprint recognition technology.

[0006] The embodiment of the present application is implemented as follows:

[0007] In one aspect of an embodiment of the present application, a fingerprint recognition module is provided, comprising: a first optical structure layer, a second optical structure layer and a photosensor array arranged in sequence, the first optical structure layer comprising a light-transmitting area and a light-guiding area, the light-transmitting area being used to pass a first reflected light reflected by a fingerprint, the light-guiding area being used to pass a second reflected light reflected by the fingerprint and guide the second reflected light to the second optical structure layer; the photosensor array receives and processes the first reflected light and the second reflected light passing through the second optical structure layer to generate a fingerprint recognition light-sensing signal.

[0008] Optionally, an incident angle of the second reflected light entering the light guiding area is greater than a preset value.

[0009] Optionally, the preset value includes a critical angle of total reflection of the interface before the second reflected light enters the light guiding area.

[0010] Optionally, in the fingerprint recognition module of the embodiment of the present application, at least one slope structure is formed on a side of the light guide area facing the second optical structure layer.

[0011] Optionally, in the fingerprint recognition module of the embodiment of the present application, the light-guiding area includes one or more; at least one light-guiding area is arranged around the light-transmitting area; or, at least one light-guiding area is arranged on at least one side of the light-transmitting area.

[0012] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope structure is one or more rings centered on the light-transmitting area, and the multiple rings are concentrically arranged; or, the slope structure is in the shape of bars, and the bars are one or more, of which at least two bars are arranged in parallel.

[0013] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope structure includes a slope surface, and the angle of the slope surface of the multiple slope structures gradually increases in the direction away from the light-transmitting area; or, the thickness of the slope structure gradually increases.

[0014] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope structure includes a slope surface, the slope surface is inclined from bottom to top toward a direction away from the light-transmitting area, and the second reflected light is emitted through the slope surface.

[0015] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope surface is a plane, and the angle between the slope surface and the main optical axis of the second optical structure layer satisfies: 80°<α2<85°.

[0016] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope surface is a curved surface.

[0017] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope structure is integrally formed on the side of the first optical structure layer facing the second optical structure layer, or a groove is processed on the side of the first optical structure layer facing the second optical structure layer, and the slope structure is integrally formed in the groove.

[0018] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope structure also includes a back surface connected to the slope surface and away from the light-transmitting area, the back surface is perpendicular to the upper surface of the first optical structure layer, and the slope structure is a ring centered on the light-transmitting area, and the back surface is a cylindrical surface.

[0019] Optionally, in the fingerprint recognition module of the embodiment of the present application, the light-transmitting area is a light-transmitting layer, or the light-transmitting area is a first through hole formed on the first optical structure layer.

[0020] Optionally, in the fingerprint recognition module of the embodiment of the present application, the light-transmitting area is circular, and the light-guiding area is a ring surrounding the circle.

[0021] Optionally, in the fingerprint recognition module of the embodiment of the present application, the light-transmitting area is rectangular, and the light-guiding area is a rectangular ring surrounding the rectangle.

[0022] Another aspect of an embodiment of the present application provides a display device, including a display module and a first optical structure layer arranged under the display module, the first optical structure layer including a light-transmitting area and a light-guiding area, the light-transmitting area is used to pass the first reflected light reflected by the fingerprint, and the light-guiding area is used to pass the second reflected light reflected by the fingerprint and guide the second reflected light to the light-emitting direction of the first reflected light, so as to generate a fingerprint recognition light-sensing signal.

[0023] In another aspect of the embodiments of the present application, an electronic device is provided, comprising a display module and a fingerprint recognition module as described above, wherein the fingerprint recognition module is arranged below the display module, or comprises the display device described above.

[0024] Another aspect of the embodiments of the present application provides a fingerprint recognition method, which is applied to the aforementioned electronic device, and the method includes: when the fingerprint is placed above the fingerprint recognition module, the first reflected light reflected by the fingerprint passes through the light-transmitting area of the first optical structure layer and the second optical structure layer in sequence to enter the photosensor array, and the second reflected light reflected by the fingerprint is guided by the light-guiding area of the first optical structure layer, passes through the second optical structure layer and enters the photosensor array; the photosensor array receives and processes the first reflected light and the second reflected light to generate a fingerprint recognition light-sensing signal.

[0025] Optionally, in the fingerprint recognition method of the embodiment of the present application, the fingerprint recognition light-sensing signal includes: a fingerprint information light-sensing signal and an anti-counterfeiting recognition light-sensing signal; the photosensor array receives and processes the first reflected light and the second reflected light, and generates the fingerprint recognition light-sensing signal, including: the photosensor array receives and processes the first reflected light, and generates the fingerprint information light-sensing signal; the photosensor array receives and processes the second reflected light, and generates the anti-counterfeiting recognition light-sensing signal.

[0026] The fingerprint recognition module, display device, electronic device and fingerprint recognition method provided by the embodiments of the present application include a first optical structure layer, a second optical structure layer and a photosensor array arranged in sequence, wherein the first optical structure layer includes a light-transmitting area and a light-guiding area, corresponding to the first reflected light and the second reflected light reflected at different angles after passing through the fingerprint. The light-transmitting area is used to pass the first reflected light reflected by the fingerprint, and the first reflected light passes through the second optical structure layer and enters the photosensor array for reception and processing. The light-guiding area is used to pass the second reflected light reflected by the fingerprint. The second reflected light can be guided to the second optical structure layer through the setting of the light-guiding area, so that the second reflected light that was originally unable to enter the photosensor array can enter the photosensor array after being guided. The photosensor array receives and processes the first reflected light and the second reflected light passing through the second optical structure layer to generate a fingerprint recognition light-sensing signal, thereby increasing the number of reflected light carrying fingerprint information entering the photosensor and improving the sensitivity of fingerprint recognition. Furthermore, due to the provision of the first optical structure layer comprising a light-transmitting area and a light-guiding area, the light reflected at different angles after being reflected by the fingerprint can be received and processed by the photosensor array as much as possible, thereby enabling the photosensor array to obtain optimal fingerprint information from the reflected light of the fingerprint, including information about the valleys and ridges of the fingerprint, sweat gland information, etc. The composite processing of fingerprint information carrying multiple different dimensions enables the authenticity determination of the detected fingerprint based on fingerprint recognition. Display devices or electronic devices using this fingerprint recognition module also have excellent information processing capabilities for fingerprints, as well as information recognition and authenticity determination functions for fingerprints. Using this fingerprint recognition method, fingerprint information can be effectively identified and the authenticity of the detected fingerprint can be determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is one of the structural schematic diagrams of a display device provided in an embodiment of the present application;

[0029] Figure 2 This is a second structural diagram of a display device provided in an embodiment of the present application;

[0030] Figure 3 This is one of the partial structural schematic diagrams of a display device provided in an embodiment of the present application;

[0031] Figure 4 This is a second schematic diagram of a partial structure of a display device provided in an embodiment of the present application;

[0032] Figure 5 This is a third schematic diagram of a partial structure of a display device provided in an embodiment of the present application;

[0033] Figure 6 This is a fourth schematic diagram of a partial structure of a display device provided in an embodiment of the present application;

[0034] Figure 7 This is a fifth schematic diagram of a partial structure of a display device provided in an embodiment of the present application;

[0035] Figure 8a This is one of the top views of the first optical structure layer in a display device provided in an embodiment of the present application;

[0036] Figure 8b This is a second top view of the first optical structure layer in a display device provided in an embodiment of the present application;

[0037] Figure 9 This is a third top view of the first optical structure layer in a display device provided in an embodiment of the present application;

[0038] Figure 10 This is a fourth top view of the first optical structure layer in a display device provided in an embodiment of the present application;

[0039] Figure 11 This is a sixth schematic diagram of a partial structure of a display device provided in an embodiment of the present application;

[0040] Figure 12 This is a third structural diagram of a display device provided in an embodiment of the present application;

[0041] Figure 13 This is a fourth structural diagram of a display device provided in an embodiment of the present application;

[0042] Figure 14 One of the flow charts of a fingerprint recognition method provided in an embodiment of the present application;

[0043] Figure 15 This is the second flowchart of a fingerprint recognition method provided in an embodiment of the present application.

[0044] Icon: 100-fingerprint; 100a-second reflected light; 100b-first reflected light; 11-display module; 12-fingerprint recognition module; 111-transparent substrate; 112-luminescent functional layer; 121-first optical structure layer; 121a-light-transmitting area; 121b-light-guiding area; 1211-slope structure; 12111-slope surface; 12112-back surface; 12113-groove; 122-second optical structure layer; 123-photosensitive sensor array; α1-slope surface angle; b1-angle between the second reflected light and the lower surface of the transparent substrate; b2-angle between the first reflected light and the lower surface of the transparent substrate; H-slope structure thickness. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0046] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0047] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0048] The present invention provides a fingerprint recognition module. Figure 1 This is one of the structural diagrams of a display device provided in the embodiment of the present application. Please refer to Figure 1The display device includes a display module 11 and a fingerprint recognition module 12 arranged below the display module 11. The fingerprint recognition module 12 includes: a first optical structure layer 121, a second optical structure layer 122 and a photosensor array 123 arranged in sequence, the first optical structure layer 121 includes a light-transmitting area 121a and a light-guiding area 121b, the light-transmitting area 121a is used to pass the first reflected light 100b reflected by the fingerprint 100, and the light-guiding area 121b is used to pass the second reflected light 100a reflected by the fingerprint 100 and guide the second reflected light 100a to the second optical structure layer 122; the photosensor array 123 receives and processes the first reflected light 100b and the second reflected light 100a passing through the second optical structure layer 122 to generate a fingerprint recognition light-sensing signal.

[0049] It should be noted that in the embodiments of the present application, the display module 11 in the display device is not specifically limited to the display mode. Taking active light-emitting display devices as an example, common ones such as organic light-emitting diode (OLED) display devices and quantum dot light-emitting diodes (QLED) are all acceptable. The following description will be made using the OLED display module 11 as an example.

[0050] The OLED display module 11 is generally composed of a transparent substrate 111 and a light-emitting functional layer 112 disposed on the transparent substrate 111. The light-emitting functional layer 112 includes at least a protective layer (Cover Glass), a polarizer, a touch panel (POL&Touch), an encapsulation layer (Encapsulation) and a corresponding control circuit (not shown in Figure 1). If the display device of the embodiment of the present application is a flexible display device, then correspondingly, the display module 11 and the fingerprint recognition module 12 can both be made of flexible materials. For example, the transparent substrate 111 of the display module 11 can be prepared using a flexible material such as PI (Polyimide Film) film.

[0051] like Figure 1As shown, the fingerprint recognition module 12 includes a first optical structure layer 121, a second optical structure layer 122 and a photosensor array 123 which are arranged in sequence. The upper surface of the first optical structure layer 121 is bonded to the lower surface of the transparent substrate 111 of the display module 11, and the second optical structure layer 122 and the photosensor array 123 are arranged in sequence below the first optical structure layer 121. Taking the fingerprint carried by the finger as an example, the finger is placed on the side of the light-emitting functional layer 112 of the display module 11, and the fingerprint 100 faces the light-emitting functional layer 112. The light beam is irradiated on different feature points on the fingerprint 100 and reflected, such as the valleys, ridges, sweat glands and / or other feature points of the fingerprint, thereby forming a first reflected light ray 100b and a second reflected light ray 100a carrying fingerprint information which are reflected in different directions. Among them, the light (such as the light of the light-transmitting area 121a of the first optical structure layer 121) is incident on Figure 1 The light (shown by the solid arrow in the middle) is divided into the first reflected light 100b. The reflection angle of the first reflected light 100b allows the first reflected light 100b to directly pass through the second optical structure layer 122 and then enter the photosensitive sensor array 123. Figure 1 The light (indicated by the dashed arrow in the middle) is divided into the second reflected light 100a. The second reflected light 100a needs to pass through the light guiding effect of the light guiding region 121b before it can pass through the second optical structure layer 122 and enter the photosensor array 123. In the embodiments of the present application, the specific structure and light guiding method of the light guiding region 121b are not specifically limited. As long as the propagation direction of the second reflected light 100a can be guided and the second reflected light 100a can pass through the second optical structure layer 122 and enter the photosensor array 123, it is sufficient. For example, the light guiding region 121b can be made of a material that can refract the light beam in a desired direction. For another example, the light guiding region 121b can be provided with a special structure to change the light beam in a specific direction. Figure 1 Due to the limitation of the illustrated size, the refraction direction of the second reflected light 100a after passing through the light guiding region 121b does not change significantly. Please refer to the description in the text for understanding.

[0052] In the above description, the fingerprint carried by the finger is mainly used as an example. It should be noted that the above description is only an example, and the fingerprint mentioned in the embodiment of the present application is not limited to this. For example, in the actual use and operation of the display device, if palm prints, joints, bones and other positions of the limbs are used as identification carriers, the limb structure characteristics and surface characteristics of these positions, such as skin texture characteristics, are used as specific biometric information for identification, which should also be understood to be equivalent to or similar to the fingerprint recognition mentioned in the embodiment of the present application.

[0053] For example, in the embodiment of the present application, the incident angle of the second reflected light 100 a entering the light guiding region 121 b is greater than a preset value, where the preset value may be a critical angle of total reflection of the second reflected light 100 a in the transparent substrate 111 .

[0054] For example, Figure 1 As shown, the incident angle b2 of the first reflected light 100b and the transparent substrate 111 is smaller than the total reflection angle of the transparent substrate 111, so the first reflected light 100b can be directly emitted to the second optical structure layer 122 and enter the photosensor array 123. The incident angle b1 of the second reflected light 100a and the transparent substrate 111 is greater than the total reflection angle of the transparent substrate 111. According to the principle of total reflection, if there is no other structure such as the light guiding area 121b, the second reflected light 100a will be totally reflected in the transparent substrate 111 and cannot be emitted. Therefore, the embodiment of the present application sets a first optical structure layer 121 on the lower surface of the transparent substrate 111 to guide the second reflected light 100a that undergoes total reflection to be emitted. The second reflected light 100a is guided outward by the light-guiding region 121b of the first optical structure layer 121, passes through the second optical structure layer 122, and enters the photosensor array 123. The photosensor array 123 receives and processes the first and second reflected light 100b, 100a to generate a fingerprint recognition light-sensing signal for the fingerprint 100. Because the fingerprint recognition light-sensing signal includes the first reflected light 100b and the second reflected light 100a, which would otherwise be unable to be emitted, the fingerprint information carried in the reflected light is richer and more diverse. Therefore, the fingerprint recognition light-sensing signal generated by the photosensor array 123, which receives and processes the first and second reflected light 100b, 10a, provides more accurate identification of the fingerprint 100. Based on the fingerprint recognition light-sensing signal, it can be determined whether the finger placed on the side of the light-emitting functional layer 112 of the display module 11 is a real finger or a disguised fingerprint pattern, such as a flat fingerprint pattern.

[0055] The fingerprint recognition module 12 provided in the embodiment of the present application is applied to a display device. The fingerprint recognition module 12 includes a first optical structure layer 121, a second optical structure layer 122, and a photosensor array 123 arranged in sequence. The first optical structure layer 121 includes a light-transmitting area 121a and a light-guiding area 121b, which correspond to the first reflected light 100b and the second reflected light 100a reflected at different angles after passing through the fingerprint 100. The light-transmitting area 121a is used to pass the first reflected light 100b reflected by the fingerprint 100. The first reflected light 100b passes through the second optical structure layer 122 and enters the photosensor array 123 for reception and processing. The light-guiding area 121b is used to pass the second reflected light 100a reflected by the fingerprint 100. The setting of the light-guiding area 121b can guide the second reflected light 100a to the second optical structure layer 122, so that the second reflected light 100a that was originally unable to enter the photosensor array 123 can enter the photosensor array 123 after being guided. The photosensor array 123 receives and processes the first reflected light 100b and the second reflected light 100a passing through the second optical structure layer 122 to generate a fingerprint recognition light-sensing signal, thereby increasing the number of reflected light rays carrying fingerprint information that enter the photosensor array 123 and improving the sensitivity of fingerprint recognition. Furthermore, due to the provision of the first optical structure layer 121, which includes the light-transmitting area 121a and the light-guiding area 121b, the photosensor array 123 can receive and process as much of the reflected light at different angles as possible after being reflected by the fingerprint 100. This allows the photosensor array 123 to obtain optimal fingerprint information from the reflected light of the fingerprint 100, including information about the valleys and ridges of the fingerprint, sweat gland information, and so on. This composite processing of fingerprint information carrying multiple dimensions enables the authenticity determination of the detected fingerprint 100 based on fingerprint recognition. A display device or electronic device using this fingerprint recognition module also has excellent information processing capabilities for the fingerprint 100, as well as information recognition and authenticity determination functions for the fingerprint 100. Using this fingerprint recognition method, fingerprint information can be effectively identified and the authenticity of the detected fingerprint 100 can be determined.

[0056] Figure 2 This is a second structural diagram of a display device provided in an embodiment of the present application, as shown in FIG. Figure 2 As shown, optionally, in the fingerprint recognition module 12 of the embodiment of the present application, at least one slope structure 1211 is formed on a side of the light guide region 121 b facing the second optical structure layer 122 .

[0057] like Figure 2 As shown, Figure 2 The light guide region 121b shown in FIG. 1 includes a plurality of continuous slope structures 1211. Figure 3FIG. 1 shows a schematic diagram of a light guide region 121b including only one slope structure 1211. The principle of the second reflected light 100a being guided in the slope structure 1211 is the same as that in FIG. Figure 2 The light guiding region 121 b is described as including a plurality of continuous slope structures 1211 , and the embodiment in which the light guiding region 121 b includes only one slope structure 1211 is not described again.

[0058] It should be noted that in this embodiment, the light-guiding region 121b guides the second reflected light 100a via the slope structure 1211. The specific light-transmitting structure of the light-transmitting region 121a is not limited. Those skilled in the art will appreciate that, in order for the first reflected light 100b to pass through the light-transmitting region 121a and exit into the second optical structure layer 122, at least basic requirements such as light transmission must be met. Of course, the light-transmitting region 121a may also be configured as a hollow structure, i.e., the first optical structure layer 121 is directly hollowed out at a location corresponding to the light-transmitting region 121a, allowing the first reflected light 100b to pass directly through the hollow structure.

[0059] The slope structure 1211 is disposed on the side of the light-guiding region 121b facing the second optical structure layer 122. The following description uses as an example an example where the slope structure 1211 and the transparent substrate 111 are made of a material having the same or approximately the same refractive index. Of course, the slope structure 1211 can also be made of a material having a different refractive index from the transparent substrate 111. When the second reflected light 100a is transmitted to the side of the first optical structure layer 121 near the second optical structure layer 122, due to the provision of the slope structure 1211 having the same refractive index, the light exit interface of the first optical structure layer 121 is directed to the surface of the slope structure 1211. This changes the exit angle of the second reflected light 100a, thereby enabling the second reflected light 100a, which was previously unable to exit due to total reflection within the first optical structure layer 121 due to a large angle with the planar exit surface, to exit due to the change in the light exit interface.

[0060] Figure 3 This is one of the partial structural diagrams of a display device provided in the embodiment of the present application. Please refer to Figure 3 The slope structure 1211 includes a slope surface 12111 and a back surface 12112 opposite to the slope surface 12111. The slope surface 12111 of the slope structure 1211 forms an included angle α1 with the plane direction (i.e., the lower surface of the transparent substrate 111 can be referenced). The slope surface 12111 is inclined from bottom to top in a direction away from the light-transmitting area 121a, and the second reflected light 100a is emitted through the slope surface 12111.

[0061] The second reflected light 100a (such as Figure 3The second reflected light 100a enters the first optical structure layer 121 from the transparent substrate 111, and has a larger light exit angle. Due to the setting of the slope structure 1211, the slope surface and the lower surface of the transparent substrate 111 have an angle α1, which makes the exit angle between the second reflected light 100a and the slope surface 12111 smaller, thereby avoiding total reflection and being able to be refracted. Figure 3 As shown, the slope surface 12111 is a plane, the cross section of the slope structure 1211 is triangular, and the angle between the slope surface 12111 and the main optical axis of the second optical structure layer 122 satisfies: 80°<α2<85°. It should be noted that, Figure 3 The position of the angle is not shown in the figure. According to the text description, the main optical axis of the second optical structure layer 122 is Figure 3 In the vertical direction, α2 and the slope surface angle α1 are complementary to each other. The angle between the slope surface 12111 and the principal optical axis of the second optical structure layer 122 is set between 80° and 85°, that is, the slope surface angle α1 is set between 5° and 10°. Adaptive adjustment within this angle range ensures that as much second reflected light 100a as possible is emitted through the slope surface 12111 of the slope structure 1211 and enters the second optical structure layer 122.

[0062] For example, the cross-section of the slope structure 1211 is a triangle. When the back surface 12112 of the slope structure 1211 is perpendicular to the lower surface of the transparent substrate 111, the cross-section of the slope structure 1211 is a right triangle. However, the embodiment of the present application does not specifically limit this. Since the back surface 12112 usually does not participate in the guided emission of the second reflected light 100a, those skilled in the art can set the angle between the back surface 12112 and the lower surface of the transparent substrate 111 according to the actual structural size and design requirements, so that the cross-section of the slope structure is an obtuse triangle, an acute triangle, etc.

[0063] Optionally, Figure 4 This is a second partial structural diagram of a display device provided in an embodiment of the present application. Figure 4 In the fingerprint recognition module of the embodiment of the present application, the slope structure 1211 includes multiple slope structures 1211, and the slope surface angle α1 of the multiple slope structures 1211 gradually increases in the direction away from the light-transmitting area 121a.

[0064] like Figure 4 As shown, the second optical structure layer 122 ( Figure 4 Not shown, please refer to Figure 1 or Figure 2) A plurality of slope structures 1211 are provided in the light-guiding region 121b close to the light-transmitting region 121a, and the slope surface angle α1 of the slope structure 1211 gradually increases along the direction toward the light-transmitting region 121a. The larger the slope surface angle α1 of the slope structure 1211, the more the direction of refraction of the second reflected light 100a when passing through the surface of the slope surface 12111 will be offset toward the direction closer to the light-transmitting area 121a. Within the entire first optical structure layer 121, the second reflected light 100a at a position farther away from the light-transmitting area 121a requires a larger light refraction angle deflection to guide the second reflected light 100a to the second optical structure layer 122. Therefore, for multiple slope structures 1211 arranged in the direction toward the light-transmitting area 121a, the slope surface angle α1 of the slope structure 1211 gradually increases. The slope surface angle α1 can be used to adjust the exit angles of the second reflected light 100a at different distances from the second optical structure layer 122, so that as many second reflected light 100a as possible can be incident on the second optical structure layer 122.

[0065] or, Figure 5 This is a partial structural diagram of a display device provided in the embodiment of the present application. Figure 5 The slope structure 1211 includes a plurality of slope structures 1211 , and a thickness H of the slope structures 1211 gradually increases in a direction away from the light-transmitting area 121 a .

[0066] like Figure 5 As shown, the second optical structure layer 122 ( Figure 5 Not shown, please refer to Figure 1 or Figure 2 ) Multiple slope structures 1211 are provided near the light-transmitting area 121a and the light-guiding area 121b. The thickness H of the slope structures 1211 gradually increases as they move away from the light-transmitting area 121a. Since the cross-section of the slope structures 1211 can be considered triangular, the thickness H of the slope structures 1211 refers to the thickness H of the slope structures 1211 along the principal optical axis of the fingerprint recognition module. The thickness H of the slope structures 1211 is proportional to the angle α1 of the slope surfaces. For example, as the thickness H of the slope structures 1211 increases, the angle α1 of the slope surfaces of the slope structures 1211 also increases. Therefore, multiple slope structures 1211 are arranged along the direction toward the light-transmitting area 121a, and the thickness H of the slope structure 1211 gradually increases. The thickness H of the slope structure 1211 can be used to adjust the emission angle of the second reflected light 100a at different distances from the second optical structure layer 122, so that as many second reflected light 100a as possible can be incident on the second optical structure layer 122.

[0067] Optionally, in the fingerprint recognition module of the embodiment of the present application, the slope surface 12111 can be set to a curved surface.

[0068] Figure 6 This is a fourth schematic diagram of a partial structure of a display device provided in an embodiment of the present application. Figure 7 This is a fifth partial structural diagram of a display device provided in an embodiment of the present application. Please refer to Figure 6 and Figure 7 , Figure 6 The slope surface 12111 is a curved surface convex outward, and the second reflected light 100a passes through Figure 6 The arc surface shown in FIG is incident on the second optical structure layer 122, because the arc surface convex outwards is Figure 6 The second reflected light 100a emitted from top to bottom has a certain convergence effect, which can make the emitted second reflected light 100a as much as possible enter the second optical structure layer 122, reducing the light loss of the second reflected light 100a.

[0069] Figure 7 The slope surface 12111 is an inwardly concave arc surface, and the second reflected light 100a passes through Figure 7 The arc surface shown in FIG is incident on the second optical structure layer 122, because the inwardly concave arc surface is Figure 7 The second reflected light 100 a emitted from top to bottom has a certain light divergence effect, which can make the second reflected light 100 a incident on the second optical structure layer 122 as uniform as possible.

[0070] It should be noted that when the slope surface 12111 is set to a curved surface structure, regardless of whether the curved surface is an inwardly concave curved surface or an outwardly convex curved surface, the embodiment of the present application does not make any specific limitation on the curvature of the curved surface. Those skilled in the art can make adaptive choices based on the specific structure and positional relationship of the fingerprint recognition module.

[0071] For example, Figure 1 As shown, the first optical structure layer 121 is made of a material having the same or approximately the same refractive index as the transparent substrate 111, and the two are connected and fixed by using a transparent adhesive having the same or approximately the same refractive index. This allows the two to be approximately integrated, avoiding the formation of an interface between the two and the occurrence of refraction, and also facilitates the extraction of the reflected light of the fingerprint 100 in the transparent substrate 111.

[0072] Optionally, in the fingerprint recognition module of the embodiment of the present application, the light-guiding area 121b includes one or more. The light-guiding area 121b is arranged around the outside of the light-transmitting area 121a; or, the light-guiding area 121b is arranged on at least one side of the light-transmitting area 121a. Correspondingly, when the light-guiding area 121b is a slope structure 1211, the slope structure 1211 is one or more rings centered on the light-transmitting area 121a. When there are multiple rings, the multiple rings are concentrically arranged. Alternatively, the slope structure 1211 is in the shape of a bar, and there are one or more bars. When there are multiple bars, at least two bars are arranged in parallel.

[0073] Figure 8a This is one of the top views of the first optical structure layer 121 in a display device provided in an embodiment of the present application, for example, Figure 8a As shown, the first optical structure layer 121 includes a light-transmitting area 121a and a light-guiding area 121b arranged around the light-transmitting area 121a. The light-transmitting area 121a is rectangular, and the light-guiding area 121b is a rectangular ring surrounding the rectangle. When the first optical structure layer 121 is configured in this manner, when the light-guiding area 121b is a slope structure 1211, the slope surface 12111 of the slope structure 1211 surrounding each side of the light-transmitting area 121a is arranged on a side close to the light-transmitting area 121a. This allows the second reflected light 100a to be guided toward the light-transmitting area 121a on each side, so that as much of the second reflected light 100a as possible is incident on the second optical structure layer 122 and received by the photosensor array 123 arranged below the second optical structure layer 122. The light-guiding area 121b is in a ring shape (rectangular ring) surrounding the outer periphery of the light-transmitting area 121a. When the light-guiding area 121b is a slope structure 1211, the slope structure 1211 is in a ring-shaped tooth shape. The ring-shaped slope structure 1211 can also include multiple, multiple ring-shaped slope structures 1211 are concentrically arranged. In the above description of the slope structure 1211, for example, when there are multiple slope structures 1211, the definition of the thickness relationship between the multiple slope structures 1211 and the definition of the slope surface angle α1 are also applicable to the ring-shaped slope structure 1211, and will not be repeated here.

[0074] Figure 8b This is a second top view of the first optical structure layer 121 in a display device provided in an embodiment of the present application, for example, Figure 8bAs shown, the first optical structure layer 121 includes a light-transmitting area 121a and a light-guiding area 121b arranged around the light-transmitting area 121a. The light-transmitting area 121a is circular, and the light-guiding area 121b is an annular ring surrounding the circle. When the first optical structure layer 121 is configured in this manner, when the light-guiding area 121b is a slope structure 1211, the slope surface 12111 of the slope structure 1211 surrounding the circular periphery of the light-transmitting area 121a is annular and faces the side closest to the light-transmitting area 121a. This allows the second reflected light 100a to be guided toward the light-transmitting area 121a at all positions in the circle, allowing as much of the second reflected light 100a as possible to enter the second optical structure layer 122 and be received by the photosensor array 123 arranged below the second optical structure layer 122. The circular light-transmitting area 121a and the annular light-guiding area 121b further make the guiding ability of the second reflected light 100a at each position of the fingerprint more uniform, so that the fingerprint recognition is more accurate.

[0075] Figure 9 This is a top view of the first optical structure layer 121 in a display device provided in an embodiment of the present application, for example, Figure 9 As shown, the first optical structure layer 121 includes a light-transmitting area 121a and a light-guiding area 121b disposed on one side of the light-transmitting area 121a. The light-guiding area 121b can be as follows Figure 9 As shown, it is arranged on one side of the light-transmitting area 121a, and can also be selectively arranged on other sides of the light-transmitting area 121a. When light-guiding areas 121b are arranged on all sides of the light-transmitting area 121a, if adjacent light-guiding areas 121b are connected to each other, it can be understood that Figure 8a The situation shown.

[0076] It should be noted that, although the top view shape of the light-transmitting area 121a is shown as a rectangle in the schematic diagram of the embodiment of the present application, it does not mean that the light-transmitting area 121a of the embodiment of the present application must be rectangular. Commonly, the light-transmitting area 121a can also be set as a circle (such as Figure 8b ), elliptical, etc., or other irregular shapes can be selected according to specific structural and design requirements. This is not specifically limited in the embodiments of the present application. Correspondingly, for example, when the light-transmitting area 121a is circular, the light-guiding area 121b arranged on one side thereof should be concentric arcs, or the light-guiding area 121b arranged around the light-transmitting area 121a should be concentric rings.

[0077] like Figure 8bAs shown, when the top view of the light-transmitting region 121a is circular, and the light-guiding region 121b is a concentric ring disposed around the light-transmitting region 121a, and the light-guiding region 121b is a slope structure 1211, the slope structure 1211 is a ring centered around the light-transmitting region 121a, and the back surface 12112 of the slope structure 1211 is a cylindrical surface. The slope structures 1211 in the form of concentric rings surrounding the light-transmitting region 121a can be interconnected, or two adjacent circles of slope structures 1211 can be concentric but separated by a certain distance.

[0078] like Figure 8a As shown, when the light-transmitting area 121 a is rectangular in top view, and the light-guiding area 121 b is disposed around the light-transmitting area 121 a , the light-guiding area 121 b is a concentric rectangular ring surrounding the rectangle.

[0079] In particular, for a display device with a specific structural form, the first optical structure layer 121 can also be set as the first optical structure layer 121 includes a light-guiding area 121b and a light-transmitting area 121a arranged on one side of the light-guiding area 121b, or the first optical structure layer 121 includes a light-guiding area 121b and a light-transmitting area 121a arranged around the light-guiding area 121b. Figure 10 This is a fourth top view of the first optical structure layer 121 in a display device provided in an embodiment of the present application, for example. Figure 10 1 shows a structural form in which the first optical structure layer 121 includes a light guiding region 121 b and a light transmitting region 121 a arranged around the light guiding region 121 b.

[0080] In the fingerprint recognition module of the embodiment of the present application, each of the aforementioned embodiments can support a structure in which the slope structure 1211 is integrally formed on the side of the first optical structure layer 121 facing the second optical structure layer 122 .

[0081] also, Figure 11 This is a sixth partial structural diagram of a display device provided in an embodiment of the present application, as shown in FIG. Figure 11 As shown, in the fingerprint recognition module of the embodiment of the present application, a groove 12113 may be further processed on the side of the first optical structure layer 121 facing the second optical structure layer 122 , and the slope structure 1211 is integrally formed in the groove 12113 .

[0082] like Figure 11As shown, the slope structure 1211 is integrally formed in the groove 12113 on the side of the first optical structure layer 121 facing the second optical structure layer 122. This method can prevent the first optical structure layer 121 from increasing its own thickness due to the provision of the slope structure 1211. The one-piece molding preparation method can also avoid adding an interface in the light propagation path of the optical device to affect the propagation of light, thereby reducing light loss during the light propagation process.

[0083] It should be noted that those skilled in the art should be aware that in order to avoid the side wall of the groove 12113 close to the light-transmitting area 121a from blocking or otherwise affecting the second reflected light 100a from entering the second optical structure layer 122, the depth of the groove 12113 and the thickness of the slope structure 1211 should be designed accordingly. The specific size range and relationship between the two are not specifically limited in the embodiments of the present application. Those skilled in the art can carry out specific design and size relationship setting and processing based on the above ideas.

[0084] Optionally, in the fingerprint recognition module of the embodiment of the present application, Figure 2 As shown, light-transmitting region 121a is a light-transmitting layer. Upon reaching light-transmitting region 121a, first reflected light 100b is able to pass through the light-transmitting layer. In the present embodiment, the material of the light-transmitting layer is not specifically limited; it can be used as long as it allows first reflected light 100b to pass through with minimal damage and without changing the direction of light propagation. Based on the structure of the light-transmitting layer, an anti-reflection coating can be applied to the light-transmitting layer to improve the light transmission efficiency of first reflected light 100b, further reduce light loss during light propagation, and increase the transmittance of the light-transmitting layer.

[0085] Figure 12 This is a third structural diagram of a display device provided in an embodiment of the present application, for example, Figure 12 As shown, the light-transmitting region 121a is a first through hole formed on the first optical structure layer 121. That is, the light-transmitting region 121a of the first optical structure layer 121 is a hollow hole directly processed on the first optical structure layer 121. No structural layer is provided in the light-transmitting region 121a. The first reflected light 100b can directly pass through the light-transmitting region 121a, thereby avoiding refraction between interfaces that may be difficult to avoid when the first reflected light 100b passes through various light-transmitting layers and light loss caused by light entering and exiting multiple interfaces.

[0086] In the embodiment of the present application, the second optical structure layer 122 is used to guide the first reflected light 100b and the second reflected light 100a into the photosensor array 123. The second optical structure layer 122 can be a converging lens, which converges the first reflected light 100b and the second reflected light 100a incident therein or further includes collimation processing and then guides them into the photosensor array 123. Figure 12As shown, the converging lens can be a single layer, or can be a lens assembly consisting of multiple layers of converging lenses arranged in sequence along the light propagation direction. In the embodiment of the present application, there is no specific limitation on the number of optical lenses set in the second optical structure layer 122.

[0087] The photosensitive sensor array 123 includes a silicon-based substrate and a plurality of photosensitive sensors arranged in an array on the silicon-based substrate. The photosensitive sensors can be formed on the silicon-based substrate through a patterning process.

[0088] Another aspect of the present application provides a display device. Figure 13 This is a fourth structural diagram of a display device provided in an embodiment of the present application, as shown in FIG. Figure 13 As shown, the display device includes a display module 11 and a first optical structure layer 121 arranged under the display module 11. The first optical structure layer 121 is divided into a light-transmitting area 121a and a light-guiding area 121b. The light-transmitting area 121a is used to pass the first reflected light 100b reflected by the fingerprint 100, and the light-guiding area 121b is used to pass the second reflected light 100a reflected by the fingerprint 100 and guide the second reflected light 100a to the light-emitting direction of the first reflected light 100b to generate a fingerprint recognition light sensing signal.

[0089] The display device provided in an embodiment of the present application includes a display module 11 and a first optical structure layer 121 arranged under the display module 11. The display module 11 has an area for placing a carrier such as a finger for fingerprint recognition. The display module 11 can use the light used for display in the module to illuminate the fingerprint 100 and reflect it. The fingerprint 100 includes the valley ridge position of the fingerprint and also includes biometric information such as sweat glands. When light is irradiated at different positions of the fingerprint 100, due to its specific structural characteristics, the reflected light can be reflected in the corresponding direction. The light reflected by the fingerprint 100 includes a first reflected light 100b and a second reflected light 100a reflected at different angles. A first optical structure layer 121 is provided under the display module 11. The first optical structure layer 121 is divided into a light-transmitting area 121a and a light-guiding area 121b. The light-transmitting area 121a is used to pass the first reflected light 100b reflected by the fingerprint 100. The light-guiding area 121b is used to pass the second reflected light 100a reflected by the fingerprint 100 and guide the second reflected light 100a to the light-emitting direction of the first reflected light 100b. Due to its inherent reflection angle, light 100a cannot propagate in the direction of the exit of first reflected light 100b. However, by providing light-guiding region 121b, the structure within light-guiding region 121b can guide second reflected light 100a in the direction of the exit of first reflected light 100b. In this way, a signal is received in the direction of the exit of first reflected light 100b, for example using a photosensor or other existing optical signal receiving devices in a multiplexed display device, to generate a fingerprint recognition optical signal including first reflected light 100b and second reflected light 100a. Due to the guiding effect of light-guiding region 121b on second reflected light 100a in first optical structure layer 121, reflected light at different angles after being reflected by the fingerprint can be received as completely as possible in the direction of the exit of first reflected light 100b. This allows for the acquisition of better fingerprint information from the reflected light of the fingerprint, including information about valleys and ridges of the fingerprint, sweat gland information, etc. The composite processing of fingerprint information carrying multiple different dimensions enables the authenticity of the detected fingerprint to be determined based on fingerprint recognition. This further improves the safety of the display device.

[0090] The display device provided in the embodiment of the present application can collect and generate fingerprint recognition light-sensing signals through the fingerprint recognition module 12 below the display module 11. The fingerprint recognition module 12 may include a second optical structure layer 122 and a photosensor array 123. The aforementioned description of the display device and the fingerprint recognition module 12 used in the display device has already provided a detailed description of the working mode of the fingerprint recognition module 12, as well as its arrangement relationship with other components of the display device, its working principle, and its working mode, which will not be repeated here.

[0091] In another aspect of the embodiments of the present application, an electronic device is provided, including Figure 1 The display module 11 and the fingerprint recognition module 12 as any one of the above items, wherein the fingerprint recognition module 12 is arranged below the display module 11.

[0092] Alternatively, an embodiment of the present application provides an electronic device, including: Figure 13 The display device shown.

[0093] Electronic devices are a general term for devices that are composed of integrated circuits, transistors and other electronic components and perform specific functions according to preset programs. Common electronic devices with display functions include but are not limited to mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, computers, TV monitors, flat-panel displays, computer monitors, car displays, navigation systems, electronic photos, projectors, etc., including Figure 1 The electronic device comprising the display module 11 and the fingerprint recognition module 12 as any one of the above items, or including Figure 13 The electronic device of the display device can obtain better fingerprint information from the reflected light of the fingerprint 100, including information about the valleys and ridges of the fingerprint 100 and sweat glands. By compositely processing the fingerprint information carrying multiple dimensions, it can realize the authenticity judgment of the detected fingerprint 100 based on fingerprint recognition. This further improves the safety of the display device.

[0094] Another aspect of the present application provides a fingerprint recognition method, which is applied to the aforementioned electronic device. Figure 14 This is one of the flow charts of a fingerprint recognition method provided in an embodiment of the present application, such as Figure 14 As shown, the fingerprint recognition method includes:

[0095] S101. When the fingerprint 100 is placed above the fingerprint recognition module 12, the first reflected light 100b reflected by the fingerprint 100 passes through the light-transmitting area 121a of the first optical structure layer 121 and the second optical structure layer 122 in sequence and enters the photosensor array 123. The second reflected light 100a reflected by the fingerprint 100 is guided by the light-guiding area 121b of the first optical structure layer 121, passes through the second optical structure layer 122 and enters the photosensor array 123.

[0096] S102 : The photosensor array 123 receives and processes the first reflected light 100 b and the second reflected light 100 a to generate a fingerprint recognition light sensing signal.

[0097] Taking the display module 11 of an electronic device as an active light-emitting display device as an example, when the fingerprint 100 is placed above the fingerprint recognition module 12, the light emitted by the display module 11 shines on the fingerprint 100. The surface of the fingerprint 100 is composed of concave and convex valleys and ridges, and also includes other biometric information such as sweat glands, which will have a corresponding impact on the reflection of the light shining on the surface of the fingerprint 100, causing the light reflected by the fingerprint 200 to carry the fingerprint information and be emitted in different directions.

[0098] The first reflected light 100b reflected by the fingerprint 100 passes through the light-transmitting area 121a of the first optical structure layer 121 and the second optical structure layer 122 in sequence and enters the photosensor array 123. The second reflected light 100a reflected by the fingerprint 100 is guided by the light-guiding area 121b of the first optical structure layer 121 and then passes through the second optical structure layer 122 and enters the photosensor array 123. Due to the guiding effect of the light-guiding area 121b of the first optical structure layer 121 on the second reflected light 100a, the second reflected light 100a that was originally unable to enter the photosensor array 123 due to reasons such as the exit angle can enter the photosensor array 123.

[0099] The photosensor array 123 receives and processes the first reflected light 100b and the second reflected light 100a to generate a fingerprint identification light signal. Since the photosensor array 123 can receive and process the second reflected light 100a that originally could not enter the photosensor array 123 in addition to receiving and processing the first reflected light 100b, the fingerprint identification light signal generated by the photosensor array 123 can obtain better fingerprint information from the reflected light of the fingerprint 100, including information about the valleys and ridges of the fingerprint, sweat gland information, etc. The composite processing of fingerprint information carrying multiple different dimensions can realize the authenticity identification judgment of the detected fingerprint 100 based on fingerprint recognition.

[0100] Optionally, Figure 15 This is a second flow chart of a fingerprint recognition method provided in an embodiment of the present application, such as Figure 15 As shown, in the fingerprint recognition method of the embodiment of the present application, the fingerprint recognition light-sensing signal includes: a fingerprint information light-sensing signal and an anti-counterfeiting recognition light-sensing signal. S102, the photosensor array 123 receives and processes the first reflected light 100b and the second reflected light 100a, and generates the fingerprint recognition light-sensing signal including:

[0101] S1021: The photosensor array 123 receives and processes the first reflected light 100b to generate a fingerprint information light sensing signal.

[0102] S1022: The photosensor array 123 receives and processes the second reflected light 100a to generate an anti-counterfeiting identification light signal.

[0103] The fingerprint identification light-sensing signals generated by the photosensor array 123 in response to the first reflected light 100b and the second reflected light 100a include a fingerprint information light-sensing signal and an anti-counterfeiting identification light-sensing signal. Specifically, the photosensor array 123 processes the fingerprint information carried in the first reflected light 100b to obtain a fingerprint information light-sensing signal, and processes the fingerprint information carried in the second reflected light 100a to obtain an anti-counterfeiting identification light-sensing signal. The combined processing of these two signals enables, on the basis of fingerprint identification, the authenticity determination of the fingerprint 100 being tested.

[0104] It should be noted that step S1021 and step S1022 do not distinguish between the order of priority. In fact, since the first reflected light 100b and the second reflected light 100a are both reflected lights formed by the reflection of light by the fingerprint 100, there is generally no obvious order of priority in the reflection process. Therefore, step S1021 and step S1022 are usually performed simultaneously during the reception processing of the photosensor array 123.

[0105] When identifying a fingerprint 100, the intensity of the anti-counterfeiting optical signal reflected by the second reflected light 100a can be used to determine whether the fingerprint 100 is three-dimensional (e.g., a fingerprint attached to a living finger). If the fingerprint 100 is a fake, for example, a computer-printed fingerprint image is used as the fingerprint 100, the intensity of the second reflected light 100a reflected by the fake fingerprint 100 will be significantly lower than the intensity of the second reflected light 100a reflected by the three-dimensional fingerprint 100, or the second reflected light 100a reflected by the fake fingerprint 100 may not be received at all. Therefore, when distinguishing between the authenticity of the fingerprint 100, a threshold intensity for the optical signal of the second reflected light 100a can be set to distinguish or determine. When the optical signal generated by the second reflected light 100a is greater than the intensity threshold, the fingerprint 100 is determined to be authentic. When the optical signal generated by the second reflected light 100a is less than or equal to the intensity threshold, the fingerprint 100 is determined to be a fake. Of course, the judgment method of the embodiment of the present application is not limited thereto. For example, the authenticity of the fingerprint can also be judged based on the intensity difference between the light signal generated by the first reflected light 100b and the light information generated by the second reflected light 100a.

[0106] Since the fingerprint recognition method has been described in detail in the above description of the fingerprint recognition working principle and working mode of the fingerprint recognition module 12, the display device and the electronic device, it will not be repeated here.

[0107] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A fingerprint recognition module, characterized in that: include: A first optical structure layer, a second optical structure layer, and a photosensor array are sequentially arranged, wherein the first optical structure layer includes a light-transmitting area and a light-guiding area, wherein the light-transmitting area is configured to pass a first reflected light reflected by the fingerprint, and the light-guiding area is configured to pass a second reflected light reflected by the fingerprint and guide the second reflected light to the second optical structure layer; The photosensitive sensor array receives and processes the first reflected light and the second reflected light passing through the second optical structure layer to generate a fingerprint recognition light sensing signal; The fingerprint recognition light-sensing signal includes: an anti-counterfeiting recognition light-sensing signal; the photosensor array receives and processes the second reflected light to generate an anti-counterfeiting recognition light-sensing signal; At least one slope structure is formed on the side of the light-guiding area facing the second optical structure layer. The slope structure is in the form of one or more rings centered on the light-transmitting area; or, the slope structure is in the form of one or more strips.

2. The fingerprint recognition module according to claim 1, characterized in that: The incident angle of the second reflected light entering the light guiding area is greater than a preset value.

3. The fingerprint recognition module according to claim 2, characterized in that: The preset value includes a critical angle of total reflection of the interface before the second reflected light enters the light guiding area.

4. The fingerprint recognition module according to claim 1, characterized in that: The light guiding area includes one or more; At least one of the light-guiding regions is arranged around the light-transmitting region; or at least one of the light-guiding regions is arranged on at least one side of the light-transmitting region.

5. The fingerprint recognition module according to claim 1, characterized in that: The plurality of rings of the slope structure are concentrically arranged; or at least two of the plurality of strips of the slope structure are arranged in parallel.

6. The fingerprint recognition module according to claim 1, characterized in that: The slope structure includes a slope surface, and the slope surface angles of the plurality of slope structures gradually increase in a direction away from the light-transmitting area; or the thickness of the slope structure gradually increases.

7. The fingerprint recognition module according to claim 1, characterized in that: The slope structure includes a slope surface, which is inclined from bottom to top in a direction away from the light-transmitting area, and the second reflected light is emitted through the slope surface.

8. The fingerprint recognition module according to claim 6, characterized in that: The slope surface is a plane, and an angle between the slope surface and the main optical axis of the second optical structure layer satisfies: 80°<α2<85°.

9. The fingerprint recognition module according to claim 6, characterized in that: The slope surface is a curved surface.

10. The fingerprint recognition module according to claim 1, characterized in that: The slope structure is integrally formed on a side of the first optical structure layer facing the second optical structure layer, or a groove is processed on a side of the first optical structure layer facing the second optical structure layer, and the slope structure is integrally formed in the groove.

11. The fingerprint recognition module according to claim 6, characterized in that: The slope structure also includes a back surface connected to the slope surface and away from the light-transmitting area. The back surface is perpendicular to the upper surface of the first optical structure layer. The slope structure is annular with the light-transmitting area as the center, and the back surface is a cylindrical surface.

12. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The light-transmitting area is a light-transmitting layer, or the light-transmitting area is a first through hole formed on the first optical structure layer.

13. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The light-transmitting area is circular, and the light-guiding area is a ring surrounding the circle.

14. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The light-transmitting area is rectangular, and the light-guiding area is a rectangular ring surrounding the rectangle.

15. A display device, characterized in that: It includes a display module and a first optical structure layer and a second optical structure layer arranged under the display module, the first optical structure layer includes a light-transmitting area and a light-guiding area, and at least one slope structure is formed on the side of the light-guiding area facing the second optical structure layer, the light-transmitting area is used to pass the first reflected light reflected by the fingerprint, and the light-guiding area is used to pass the second reflected light reflected by the fingerprint and guide the second reflected light to the second optical structure layer to generate a fingerprint recognition light-sensing signal, and the fingerprint recognition light-sensing signal includes: an anti-counterfeiting recognition light-sensing signal.

16. An electronic device, characterized in that: It comprises a display module and a fingerprint recognition module according to any one of claims 1 to 14, wherein the fingerprint recognition module is arranged below the display module, or comprises the display device according to claim 15.

17. A fingerprint recognition method, applied to the electronic device according to claim 16, characterized in that: The method comprises: When a fingerprint is placed above the fingerprint recognition module, the first reflected light reflected by the fingerprint passes through the light-transmitting area of the first optical structure layer and the second optical structure layer in sequence and enters the photosensor array. The second reflected light reflected by the fingerprint is guided by the light-guiding area of the first optical structure layer, passes through the second optical structure layer, and enters the photosensor array. The photosensor array receives and processes the first reflected light and the second reflected light to generate a fingerprint recognition light-sensing signal; the fingerprint recognition light-sensing signal includes: a fingerprint information light-sensing signal and an anti-counterfeiting recognition light-sensing signal.

18. The fingerprint recognition method according to claim 17, characterized in that: The light sensor array receives and processes the first reflected light and the second reflected light to generate a fingerprint recognition light sensing signal, which includes: The photosensitive sensor array receives and processes the first reflected light to generate a fingerprint information light-sensing signal; the photosensitive sensor array receives and processes the second reflected light to generate an anti-counterfeiting identification light-sensing signal.

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