Prosthesis fingerprint model and fingerprint identification test method

Abstract

The invention relates to a prosthesis fingerprint model and a fingerprint identification test method. The prosthesis fingerprint model comprises a model base body which comprises a first surface and a second surface which are arranged oppositely, and a base body side face connected between the first surface and the second surface; the fingerprint feature is located on the second surface of the model base body, and the fingerprint feature comprises a plurality of fingerprint ridges and a plurality of fingerprint valleys; the protection component is at least partially arranged around the side face of the base body on a first plane, and the first plane is perpendicular to the direction where the first surface points to the second surface; wherein the elastic modulus of the protection component is greater than that of the fingerprint feature. According to the invention, the accuracy of the fingerprint simulation test can be improved.

Description

Technical Field

[0001] The present application relates to the field of fingerprint recognition, and in particular to a prosthetic fingerprint model and a fingerprint recognition test method. Background Art

[0002] Fingerprint recognition is an important biometric technology that has been widely used in products such as mobile phones, computers and smart locks. Products with fingerprint recognition functions need to undergo fingerprint recognition testing to determine the characteristics and parameters of fingerprint recognition and determine whether they are good products. Currently, ultrasonic fingerprint recognition technology relies on the difference in energy transmission between ultrasonic waves and the medium and reflection at the interface to determine the position of fingerprint ridges (fingerprint ridges) and depressions (fingerprint valleys). Therefore, fingerprint simulation components such as prosthetic fingerprint models must be used for testing and compared with standard images to simulate the fingerprint recognition state of a person's finger placed on the product surface.

[0003] However, the existing artificial fingerprint model has the disadvantage of being deformed and causing differences from the standard image, which reduces the accuracy of the simulation test. Summary of the invention

[0004] Based on this, it is necessary to provide a new prosthetic fingerprint model and fingerprint recognition test method to address the problem that the prosthetic fingerprint model in the prior art has the disadvantage of being deformed and causing differences from the standard image, thereby reducing the accuracy of the simulation test.

[0005] According to a first aspect of the present application, a prosthetic fingerprint model is provided, comprising:

[0006] A model substrate, comprising a first surface and a second surface disposed opposite to each other, and a substrate side surface connected between the first surface and the second surface;

[0007] A fingerprint feature located on the second surface of the model substrate, the fingerprint feature comprising a plurality of fingerprint ridges and a plurality of fingerprint valleys;

[0008] A protective component is disposed at least partially around the side surface of the substrate on a first plane, wherein the first plane is perpendicular to the first surface and points to the direction of the second surface;

[0009] Wherein, the elastic modulus of the protective component is greater than the elastic modulus of the fingerprint feature.

[0010] In some embodiments, it further comprises:

[0011] The temperature control component is connected to the outer side of the protection component, and the thermal conductivity of the protection component is greater than the thermal conductivity of the fingerprint feature.

[0012] In some embodiments, the model substrate and the fingerprint feature are an integrally formed structure; and / or,

[0013] The protection component is arranged in a closed ring around the model base.

[0014] In some embodiments, the protective component includes a first end away from the first surface in a first direction, the first direction is parallel to the direction of the first surface pointing to the second surface, and the distance from the surface of the first end away from the first surface to the first surface is less than or equal to the distance from the surface of the fingerprint ridge away from the first surface to the first surface.

[0015] In some embodiments, the protective component includes a protective main body extending along the first direction, and a first protective portion located at the first end, the first protective portion protruding toward the center of the second surface relative to the protective main body, and the first protective portion is at least partially located on a side of the second surface away from the first surface.

[0016] In some embodiments, the first protection portion abuts against the second surface; and / or,

[0017] A thickness of the first protection portion in the first direction is less than or equal to a height of the fingerprint ridge in the first direction.

[0018] In some embodiments, the model substrate includes a groove located on a side of the substrate, and the groove is arranged around the model substrate on the first plane;

[0019] The protection component includes a second end away from the first end in the first direction, and the protection component includes a second protection portion located at the second end, the second protection portion protrudes toward the center of the model base relative to the protection main body, and the second protection portion is at least partially accommodated in the groove.

[0020] In some embodiments, the material of the protection component includes at least one of metal and ceramic; and / or,

[0021] The material of the model substrate and the fingerprint feature includes plastic.

[0022] According to a second aspect of the present application, a fingerprint recognition test method is provided, comprising:

[0023] A prosthetic fingerprint model is provided, the prosthetic fingerprint model comprising a model base, a fingerprint feature and a protective component, the model base comprising a first surface and a second surface disposed opposite to each other, and a base side surface connected between the first surface and the second surface, the fingerprint feature is located on the second surface of the model base, the fingerprint feature comprises a plurality of fingerprint ridges and a plurality of fingerprint valleys, the protective component is disposed at least partially around the base side surface on a first plane, the first plane is perpendicular to the first surface and points to the second surface, wherein the elastic modulus of the protective component is greater than the elastic modulus of the fingerprint feature;

[0024] Providing a testing device;

[0025] Providing an object to be tested, wherein the object to be tested includes a fingerprint recognition surface;

[0026] Placing the prosthetic fingerprint model on the fingerprint recognition surface;

[0027] Connecting the test device to the prosthetic fingerprint model;

[0028] The test device is turned on to perform a fingerprint test.

[0029] In some embodiments, the prosthetic fingerprint model further includes a temperature control component, the temperature control component is connected to the outside of the protective component, the thermal conductivity of the protective component is greater than the thermal conductivity of the fingerprint feature, and the step of opening the test device to perform the fingerprint test includes:

[0030] monitoring the temperature of the model substrate and the fingerprint feature by the temperature control component;

[0031] The temperatures of the model substrate and the fingerprint feature are calibrated according to the temperatures of the model substrate and the fingerprint feature.

[0032] In the embodiment of the present application, the protective component is arranged at least partially around the side of the substrate on the first plane, the first plane is perpendicular to the first surface and points to the direction of the second surface, and the elastic modulus of the protective component is greater than the elastic modulus of the fingerprint feature. In the first aspect (on the plane parallel to the second surface, or on the plane parallel to the first plane), the elastic modulus of the protective component is large, the protective component is not easy to deform, when the prosthetic fingerprint model is placed on the fingerprint recognition surface, the prosthetic fingerprint model is pressed or squeezed, the protective component is not easy to deform, the protective component limits or blocks the deformation of the fingerprint feature, so that the deformation of the fingerprint feature is reduced, the fingerprint feature is made in accordance with the finger fingerprint, so that the difference between the fingerprint feature and the standard image is reduced during the fingerprint test, and the accuracy of the fingerprint recognition test is improved. In the second aspect (on the plane perpendicular to the second surface, or in the direction perpendicular to the first plane), by setting the protective component at an appropriate height, the protective component can play a strong supporting role, so that the fingerprint feature does not deform or deforms slightly during the fingerprint test, and the difference between the fingerprint feature and the standard image is reduced during the fingerprint test, and the accuracy of the fingerprint recognition test is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of a first cross-sectional structure of a prosthetic fingerprint model provided in an embodiment of the present application.

[0035] Figure 2 A schematic diagram of a second cross-sectional structure of a prosthetic fingerprint model provided in an embodiment of the present application.

[0036] Figure 3 A schematic diagram of a top view of a prosthetic fingerprint model provided in an embodiment of the present application.

[0037] Figure 4 A schematic diagram of the process steps of a fingerprint recognition test method provided in an embodiment of the present application.

[0038] Figure 5 A schematic diagram of an object to be tested in a fingerprint recognition test method provided in an embodiment of the present application.

[0039] Figure 6 A schematic diagram of the testing process of a fingerprint recognition testing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0046] In the prior art, the prosthetic fingerprint model has the disadvantage of being greatly different from the standard image due to deformation, which reduces the accuracy of the simulation test.

[0047] Based on the above problems, the present application provides a new prosthetic fingerprint model and a fingerprint recognition test method.

[0048] See also Figures 1 to 3 . Figure 1 A schematic diagram of a first cross-sectional structure of a prosthetic fingerprint model provided in an embodiment of the present application. Figure 2 A schematic diagram of a second cross-sectional structure of a prosthetic fingerprint model provided in an embodiment of the present application. Figure 3 A schematic diagram of a top view of a prosthetic fingerprint model provided in an embodiment of the present application.

[0049] See also Figures 4 to 6 . Figure 4 A schematic diagram of the process steps of a fingerprint recognition test method provided in an embodiment of the present application. Figure 5 A schematic diagram of an object to be tested in a fingerprint recognition test method provided in an embodiment of the present application. Figure 6 A schematic diagram of the testing process of a fingerprint recognition testing method provided in an embodiment of the present application.

[0050] The present application provides a prosthetic fingerprint model 100, which includes a model substrate 10, a fingerprint feature 20 and a protective component 30. The model substrate 10 includes a first surface 111 and a second surface 112 disposed opposite to each other, and a substrate side surface 113 connected between the first surface 111 and the second surface 112. The fingerprint feature 20 is located on the second surface 112 of the model substrate 10, and the fingerprint feature 20 includes a plurality of fingerprint ridges 21 and a plurality of fingerprint valleys 22. The protective component 30 is disposed at least partially around the substrate side surface 113 on a first plane, and the first plane is perpendicular to the first surface 111 and points to the direction of the second surface 112. The elastic modulus of the protective component 30 is greater than the elastic modulus of the fingerprint feature 20.

[0051] For example, the fingerprint feature 20 includes a plurality of fingerprint ridges 21 and a plurality of fingerprint valleys 22, and the fingerprint ridges 21 and the fingerprint valleys 22 may be arranged alternately. The fingerprint ridges 21 and the fingerprint valleys 22 may be arranged to imitate a real finger, for example, the fingerprint ridges 21 and the fingerprint valleys 22 are configured to change regularly in a specified direction, which is not limited here.

[0052] For example, on the second surface 112, the fingerprint ridge 21 is raised relative to the fingerprint valley 22. Figure 1 and Figure 2 In the description, a plane where at least a portion of the fingerprint valleys 22 are located is taken as the second surface 112 .

[0053] For example, the first plane may be roughly parallel to the first surface 111, and the first plane may also be roughly parallel to the second surface 112. The first surface 111 and the second surface 112 may be planes, and the first surface 111 and the second surface 112 may not be planes, for example, portions of the first surface 111 and the second surface 112 may be curved surfaces, for example, portions of the first surface 111 and the second surface 112 may be planes.

[0054] For example, when the first surface 111 and the second surface 112 are planes, the first plane may be parallel to the first surface 111 or the second surface 112 .

[0055] For example, the first surface 111 points to the direction of the second surface 112, that is, the direction in which the first surface 111 and the second surface 112 are opposite to each other. For example, when the first surface 111 or the second surface 112 is a plane, the direction in which the first surface 111 points to the second surface 112 may be perpendicular to the first surface 111 or the second surface 112.

[0056] For example, the protective component 30 is arranged around at least a portion of the substrate side surface 113 on the first plane, that is, the protective component 30 wraps at least a portion of the substrate side surface 113 on the first plane, that is, the protective component 30 wraps at least a portion of the substrate side surface 113 on the first plane, for example, in the orthographic projection on the first plane, the orthographic projection of the protective component 30 is arranged around at least a portion of the orthographic projection of the substrate side surface 113.

[0057] For example, the elastic modulus of the protection component 30 is greater than the elastic modulus of the fingerprint feature 20 , and the protection component 30 is not easily deformed. The protection component 30 plays a role in limiting the deformation of the fingerprint feature 20 .

[0058] Illustratively, the model substrate 10 and the fingerprint feature 20 include an elastomeric material. The protective component 30 includes a rigid material.

[0059] In the embodiment of the present application, the protective component 30 is arranged at least partially around the substrate side surface 113 on the first plane, the first plane is perpendicular to the first surface 111 and points to the direction of the second surface 112, and the elastic modulus of the protective component 30 is greater than the elastic modulus of the fingerprint feature 20. In the first aspect (on the plane parallel to the second surface 112, or on the plane parallel to the first plane), that is, the elastic modulus of the protective component 30 is large, the protective component 30 is not easy to deform, when the pseudo fingerprint model 100 is placed on the fingerprint recognition surface, when the pseudo fingerprint model 100 is pressed or squeezed, the protective component 30 is not easy to deform, the protective component 30 limits or blocks the deformation of the fingerprint feature 20, so that the deformation of the fingerprint feature 20 is reduced, and the fingerprint feature 20 is made in accordance with the finger fingerprint, so that the difference between the fingerprint feature 20 and the standard image is reduced during the fingerprint test, thereby improving the accuracy of the fingerprint recognition test. On the second aspect (on the plane perpendicular to the second surface 112, or in the direction perpendicular to the first plane), by setting the protective component 30 at an appropriate height, the protective component 30 can play a strong supporting role, so that the fingerprint feature 20 does not deform or deforms slightly during the fingerprint test, and the difference between the fingerprint feature 20 and the standard image is reduced during the fingerprint test, thereby improving the accuracy of the fingerprint recognition test.

[0060] For example, the standard image may be a recorded fingerprint of a real person's finger or a recorded fingerprint feature 20 , but is not limited thereto.

[0061] In some embodiments, Figure 2 As shown, the artificial fingerprint model 100 further includes a temperature control component 40 , which is connected to the outer side of the protection component 30 , and the thermal conductivity of the protection component 30 is greater than the thermal conductivity of the fingerprint feature 20 .

[0062] For example, the temperature control component 40 is connected to the protection component 30 to control the temperature of the protection component 30 , thereby controlling the temperature of the fingerprint feature 20 .

[0063] For example, in some embodiments, due to differences in heat conduction or due to factors such as heat generation of the object to be tested, the temperature of the fingerprint recognition surface of the object to be tested is usually different from the ambient temperature. When a real finger is used for fingerprint recognition, when the real finger touches the fingerprint recognition surface, the temperature on the fingerprint of the real finger is close to the temperature of the fingerprint recognition surface. At this time, for example, by setting a temperature control component 40, the temperature of the fingerprint feature 20 can be controlled to be close to or the same as the temperature on the fingerprint recognition surface, and the fingerprint recognition process can be simulated more realistically, thereby improving the accuracy of the fingerprint recognition test.

[0064] For example, in some other embodiments, the ambient temperature condition required for the fingerprint recognition test is a preset ambient temperature (standard ambient temperature), and the actual ambient temperature does not meet the preset ambient temperature. At this time, the temperature of the protective component 30 can be controlled by the temperature control component 40 to calibrate the temperature of the fingerprint feature 20 in the test to be the same as the preset ambient temperature.

[0065] For example, in some other embodiments, the temperature control component 40 can monitor the temperature of the fingerprint feature 20, and the monitored temperature of the fingerprint feature 20 is fed back to the test device 300, and the test device 300 can calibrate the temperature of the model substrate 10 and the fingerprint feature 20. For example, the temperature control component 40 may include a thermocouple, and the thermocouple is connected to the wire 401 (such as a wire with good heat transfer performance) through Figure 6 The heat of the protection component 30 can be transferred to the thermocouple through the wire 401, so that the temperature control component 40 can monitor the temperature of the fingerprint feature 20.

[0066] For example, in some embodiments, the temperature control component 40 may include a thermocouple, but is not limited thereto.

[0067] In some embodiments, Figure 1 and Figure 2 As shown, the model base 10 and the fingerprint feature 20 are an integrally formed structure.

[0068] For example, in some embodiments, the model base 10 and the fingerprint feature 20 are an integrally formed structure, for example, both are made of rubber injection molding.

[0069] For example, in some other embodiments, the model substrate 10 and the fingerprint feature 20 may be made of different materials, and the model substrate 10 and the fingerprint feature 20 may be of different structures.

[0070] In some embodiments, Figures 1 to 3 As shown, the protection component 30 is arranged around the model base 10 in a closed ring shape.

[0071] For example, in some embodiments, the orthographic projection of the protective component 30 on the first surface 111 is arranged around the orthographic projection of the substrate side surface 113 on the first surface 111, and the orthographic projection of the protective component 30 on the first surface 111 is arranged in a closed ring shape, which can limit the deformation of the fingerprint feature 20 from all directions, and can control the temperature of the fingerprint feature 20 from all directions, which can better improve the accuracy of the fingerprint test.

[0072] In some embodiments, the protective component 30 includes a first end 30a away from the first surface 111 in a first direction Y, the first direction Y is parallel to the first surface 111 and points to the second surface 112, and the distance from the surface of the first end 30a away from the first surface 111 to the first surface 111 is less than or equal to the distance from the surface of the fingerprint ridge 21 away from the first surface 111 to the first surface 111.

[0073] For example, when the first surface 111 or the second surface 112 is a plane, the first direction Y may be perpendicular to the first surface 111 or the second surface 112 .

[0074] For example, the distance from the surface of the first end 30a away from the first surface 111 to the first surface 111 is less than or equal to the distance from the surface of the fingerprint ridge 21 away from the first surface 111 to the first surface 111. When the prosthetic fingerprint model 100 is placed on a fingerprint recognition surface, the fingerprint feature 20 is prevented from contacting the fingerprint recognition surface (the fingerprint feature 20 is prevented from being suspended) when the prosthetic fingerprint model 100 is pressed or squeezed.

[0075] In some embodiments, the protective component 30 includes a protective main body portion 31 extending along a first direction Y, and a first protective portion 32 located at the first end 30a, the first protective portion 32 protruding toward the center of the second surface 112 relative to the protective main body portion 31, and the first protective portion 32 is at least partially located on the side of the second surface 112 away from the first surface 111.

[0076] For example, the first protecting portion 32 protrudes toward the center of the second surface 112 relative to the protecting body portion 31, and the first protecting portion 32 is at least partially located on a side of the second surface 112 away from the first surface 111, so that the first protecting portion 32 and the protecting body portion 31 clamp the model base 10 (and / or clamp the fingerprint feature 20), reducing or avoiding excessive deformation of the model base 10 (and / or clamping the fingerprint feature 20), thereby reducing or avoiding excessive deformation of the fingerprint feature 20.

[0077] In some embodiments, the first protection portion 32 abuts against the second surface 112 .

[0078] For example, the first protection portion 32 abuts against the second surface 112 , and the first protection portion 32 and the protection body portion 31 clamp the model base 10 , reducing or avoiding excessive deformation of the model base 10 , thereby reducing or avoiding excessive deformation of the fingerprint feature 20 .

[0079] In some embodiments, the thickness of the first protection portion 32 in the first direction Y is less than or equal to the height of the fingerprint ridge 21 in the first direction Y.

[0080] For example, the thickness of the first protection portion 32 in the first direction Y is less than or equal to the height of the fingerprint ridge 21 in the first direction Y. When the prosthetic fingerprint model 100 is placed on a fingerprint recognition surface and the prosthetic fingerprint model 100 is pressed or squeezed, the fingerprint feature 20 is prevented from contacting the fingerprint recognition surface (the fingerprint feature 20 is prevented from being suspended).

[0081] For example, Figure 2 As shown, the thickness of the first protection portion 32 in the first direction Y is a first thickness d1, the height of the fingerprint ridge 21 in the first direction Y is a second thickness d2, and the first thickness d1 is less than or equal to the second thickness d2.

[0082] In some embodiments, the model base 10 includes a groove 113a located on the base side 113, and the groove 113a is arranged around the model base 10 on the first plane; the protective component 30 includes a second end 30b away from the first end 30a in the first direction Y, and the protective component 30 includes a second protective portion 33 located at the second end 30b, the second protective portion 33 protrudes toward the center of the model base 10 relative to the protective main body portion 31, and the second protective portion 33 is at least partially accommodated in the groove 113a.

[0083] For example, in some embodiments, the orthographic projection of the groove 113 a on the first surface 111 is in the shape of a closed ring.

[0084] For example, relative to the protective main body 31, the second protective part 33 is partially or completely accommodated in the groove 113a, so that the second protective part 33, the protective main body 31 and the first protective part 32 clamp the model base 10, reducing or avoiding excessive deformation of the model base 10, thereby better reducing or avoiding excessive deformation of the fingerprint feature 20.

[0085] In some embodiments, the material of the protection component 30 includes at least one of metal and ceramic.

[0086] For example, the material of the protection component 30 may be iron, copper, or the like.

[0087] In some embodiments, the material of the model substrate 10 and the fingerprint feature 20 includes plastic.

[0088] For example, the material of the model base 10 and the fingerprint feature 20 may be rubber.

[0089] For example, the material of the protection component 30 may be iron, copper, etc., and the material of the model substrate 10 and the fingerprint feature 20 may be rubber. The elastic modulus of materials such as iron and copper is greater than that of rubber.

[0090] In the second aspect, based on the same inventive concept, the present application also provides a fingerprint identification test method, which can use any of the above-mentioned prosthetic fingerprint models 100. Figure 4 As shown, the fingerprint recognition test method includes: step S100, step S200, step S300, step S400, step S500, and step S600.

[0091] Step S100, providing a prosthetic fingerprint model, the prosthetic fingerprint model comprising a model substrate, a fingerprint feature and a protective component, the model substrate comprising a first surface and a second surface disposed opposite to each other, and a substrate side surface connected between the first surface and the second surface, the fingerprint feature is located on the second surface of the model substrate, the fingerprint feature comprises a plurality of fingerprint ridges and a plurality of fingerprint valleys, the protective component is disposed at least partially around the substrate side surface on a first plane, the first plane is perpendicular to the direction of the first surface pointing to the second surface, wherein the elastic modulus of the protective component is greater than the elastic modulus of the fingerprint feature.

[0092] By way of example, a prosthetic fingerprint model 100 is provided, comprising a model substrate 10, a fingerprint feature 20 and a protective component 30, wherein the model substrate 10 comprises a first surface 111 and a second surface 112 disposed opposite to each other, and a substrate side surface 113 connected between the first surface 111 and the second surface 112, the fingerprint feature 20 is located on the second surface 112 of the model substrate 10, the fingerprint feature 20 comprises a plurality of fingerprint ridges 21 and a plurality of fingerprint valleys 22, the protective component 30 is disposed at least partially around the substrate side surface 113 on a first plane, the first plane being perpendicular to the first surface 111 and pointing in the direction of the second surface 112, wherein the elastic modulus of the protective component 30 is greater than the elastic modulus of the fingerprint feature 20.

[0093] Step S200: providing a testing device.

[0094] For example, Figure 6 As shown, a testing device 300 is provided.

[0095] For example, the test device 300 may load the prosthetic fingerprint model 100 and move the prosthetic fingerprint model 100 to the fingerprint recognition surface 201 a . The test device 300 may also apply a certain pressure to the prosthetic fingerprint model 100 to simulate the pressure of a real finger.

[0096] Step S300, providing an object to be tested, wherein the object to be tested includes a fingerprint recognition surface;

[0097] For example, Figure 5 As shown, a test object 200 is provided. The test object 200 includes a fingerprint recognition surface 201a. The fingerprint recognition surface 201a is a surface touched by a real person's finger for fingerprint recognition.

[0098] For example, Figure 5 As shown, the object to be tested 200 may be a mobile phone, a computer, a smart lock, or other product with a fingerprint recognition function. Figure 5 In the example of the display device, Figure 6 The display device includes a display panel 201, a fingerprint recognition sensor 202 disposed on the back side of the display panel 201, and a circuit board 203 or a test chip connected to the fingerprint recognition sensor 202. The fingerprint recognition sensor 202 can send a fingerprint recognition signal, which is reflected by a plurality of fingerprint ridges 21 and a plurality of fingerprint valleys 22 in the fingerprint feature 20 and then received by the fingerprint recognition sensor 202. The signal received by the fingerprint recognition sensor 202 is transmitted to the circuit board 203 or the test chip to perform fingerprint recognition judgment.

[0099] Step S400: placing the prosthetic fingerprint model on the fingerprint recognition surface.

[0100] By way of example, the artificial fingerprint model 100 is placed on the fingerprint recognition surface 201 a .

[0101] Step S500: connecting the test device to the prosthetic fingerprint model.

[0102] By way of example, the test device 300 is connected to the artificial fingerprint model 100 .

[0103] For example, in some embodiments, the temperature control component 40 is also a part of the testing device 300 , but is not limited thereto.

[0104] For example, in some embodiments, after the test device 300 is connected to the prosthetic fingerprint model 100, the prosthetic fingerprint model 100 is placed on the fingerprint recognition surface 201a. For example, the prosthetic fingerprint model 100 can be placed on the fingerprint recognition surface 201a through the test device 300.

[0105] Step S600, performing fingerprint testing.

[0106] By way of example, a fingerprint test is performed.

[0107] In some embodiments, the prosthetic fingerprint model 100 further includes a temperature control component 40, which is connected to the outer side of the protective component 30, and the thermal conductivity of the protective component 30 is greater than the thermal conductivity of the fingerprint feature 20. The steps of performing fingerprint testing include: step 601, monitoring the temperature of the model substrate 10 and the fingerprint feature 20 through the temperature control component 40; step 602, calibrating the temperature of the model substrate 10 and the fingerprint feature 20 according to the temperature of the model substrate 10 and the fingerprint feature 20.

[0108] For example, the temperature control component 40 is connected to the protection component 30 to monitor and / or control the temperature of the protection component 30 , thereby controlling the temperature of the fingerprint feature 20 .

[0109] For example, in some embodiments, due to differences in heat conduction or due to factors such as heat generation of the object to be tested 200, the temperature of the fingerprint recognition surface 201a of the object to be tested 200 is usually different from the ambient temperature. When a real finger is used for fingerprint recognition, when the real finger touches the fingerprint recognition surface, the temperature on the fingerprint of the real finger is close to the temperature of the fingerprint recognition surface. At this time, for example, by setting a temperature control component 40, the temperature of the fingerprint feature 20 can be controlled to be close to or the same as the temperature on the fingerprint recognition surface 201a, and the fingerprint recognition process can be simulated more realistically, thereby improving the accuracy of the fingerprint recognition test, so as to calibrate the temperature of the model substrate 10 and the fingerprint feature 20.

[0110] For example, in some other embodiments, the ambient temperature condition required for the fingerprint recognition test is a preset ambient temperature, and the actual ambient temperature does not meet the preset ambient temperature. At this time, the temperature of the protective component 30 can be controlled by the temperature control component 40 to calibrate the temperature of the fingerprint feature 20 in the test to be the same as the preset ambient temperature, so as to calibrate the temperature of the model substrate 10 and the fingerprint feature 20.

[0111] For example, in some other embodiments, the temperature control component 40 can monitor the temperature of the fingerprint feature 20, and the monitored temperature of the fingerprint feature 20 is fed back to the test device 300, and the test device 300 can calibrate the temperature of the model substrate 10 and the fingerprint feature 20. For example, the temperature control component 40 may include a thermocouple, and the thermocouple is connected to the wire 401 (such as a wire with good heat transfer performance) through Figure 6 The heat of the protection component 30 can be transferred to the thermocouple through the wire 401, so that the temperature control component 40 can monitor the temperature of the fingerprint feature 20 to facilitate the calibration of the temperature of the model substrate 10 and the fingerprint feature 20.

[0112] For example, Figure 1 and Figure 2 As shown, the model substrate 10 and the fingerprint feature 20 are made of materials with acoustic impedance characteristics similar to those of human fingers. The fingerprint feature 20 is located on the test contact surface and covers the ultrasonic fingerprint module recognition range. The fingerprint feature 20 is a regular characteristic pattern, which is a custom standard image, including but not limited to diagonal lines (convex or concave, fingerprint ridges 21 and fingerprint valleys 22) / radial stripes (convex or concave, fingerprint ridges 21 and fingerprint valleys 22), etc. The protective component 30 is located on the test contact surface and outside the ultrasonic fingerprint module recognition range. The protective component 30 is surrounded by a frame of a material with strong rigidity and fast thermal conductivity, including but not limited to metal / ceramic / composite materials. The temperature control component 40 is connected to the protective component 30.

[0113] For example, Figure 5 and Figure 6 As shown, during the test, the prosthetic fingerprint model 100 contacts the fingerprint recognition surface 201a of the object to be tested 200, and the fingerprint feature 20 can provide image comparison clarity because the protection component 30 is limited and does not deform due to pressure. The protection component 30 can transfer the temperature of the model base 10 and the fingerprint feature 20 to the outside through the temperature control component 40, and provide the test equipment 300 with the precise temperature of the object to be tested 200 to complete the temperature calibration of the fingerprint recognition test.

[0114] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A prosthetic fingerprint model, characterized in that: include: A model substrate, comprising a first surface and a second surface disposed opposite to each other, and a substrate side surface connected between the first surface and the second surface; A fingerprint feature located on the second surface of the model substrate, the fingerprint feature comprising a plurality of fingerprint ridges and a plurality of fingerprint valleys; A protective component is disposed at least partially around the side surface of the substrate on a first plane, wherein the first plane is perpendicular to the first surface and points to the direction of the second surface; Wherein, the elastic modulus of the protective component is greater than the elastic modulus of the fingerprint feature.

2. The prosthetic fingerprint model according to claim 1, characterized in that: Also includes: The temperature control component is connected to the outer side of the protection component, and the thermal conductivity of the protection component is greater than the thermal conductivity of the fingerprint feature.

3. The prosthetic fingerprint model according to claim 1, characterized in that: The model substrate and the fingerprint feature are an integrally formed structure; and / or, The protection component is arranged in a closed ring around the model base.

4. The prosthetic fingerprint model according to claim 1, characterized in that: The protective component includes a first end away from the first surface in a first direction, the first direction is parallel to the first surface and points to the second surface, and a distance from a surface of the first end away from the first surface to the first surface is less than or equal to a distance from a surface of the fingerprint ridge away from the first surface to the first surface.

5. The prosthetic fingerprint model according to claim 4, characterized in that: The protection component includes a protection body extending along the first direction, and a first protection portion located at the first end, the first protection portion protruding toward the center of the second surface relative to the protection body, and the first protection portion is at least partially located on a side of the second surface away from the first surface.

6. The prosthetic fingerprint model according to claim 5, characterized in that: The first protection portion abuts against the second surface; and / or, A thickness of the first protection portion in the first direction is less than or equal to a height of the fingerprint ridge in the first direction.

7. The prosthetic fingerprint model according to claim 5, characterized in that: The model base includes a groove located on a side surface of the base, and the groove is arranged around the model base on the first plane; The protection component includes a second end away from the first end in the first direction, and the protection component includes a second protection portion located at the second end, the second protection portion protrudes toward the center of the model base relative to the protection main body, and the second protection portion is at least partially accommodated in the groove.

8. The prosthetic fingerprint model according to claim 1, characterized in that: The material of the protective component includes at least one of metal and ceramic; and / or, The material of the model substrate and the fingerprint feature includes plastic.

9. A fingerprint recognition test method, characterized in that: include: A prosthetic fingerprint model is provided, the prosthetic fingerprint model comprising a model base, a fingerprint feature and a protective component, the model base comprising a first surface and a second surface disposed opposite to each other, and a base side surface connected between the first surface and the second surface, the fingerprint feature is located on the second surface of the model base, the fingerprint feature comprises a plurality of fingerprint ridges and a plurality of fingerprint valleys, the protective component is disposed at least partially around the base side surface on a first plane, the first plane is perpendicular to the first surface and points to the second surface, wherein the elastic modulus of the protective component is greater than the elastic modulus of the fingerprint feature; Providing a testing device; Providing an object to be tested, wherein the object to be tested includes a fingerprint recognition surface; Placing the prosthetic fingerprint model on the fingerprint recognition surface; Connecting the test device to the prosthetic fingerprint model; Take a fingerprint test.

10. The fingerprint recognition test method according to claim 9, characterized in that: The prosthetic fingerprint model further includes a temperature control component, the temperature control component is connected to the outside of the protective component, the thermal conductivity of the protective component is greater than the thermal conductivity of the fingerprint feature, and the step of performing the fingerprint test includes: monitoring the temperature of the model substrate and the fingerprint feature by the temperature control component; The temperatures of the model substrate and the fingerprint feature are calibrated according to the temperatures of the model substrate and the fingerprint feature.

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