Fingerprint identification module and electronic equipment

Abstract

The invention relates to the technical field of touch display, in particular to a fingerprint identification module and electronic equipment. In the embodiment of the invention, the shell matched with the substrate is arranged, so that external dirt can be prevented from polluting parts in the accommodating cavity by virtue of the shell, and a touch communication function can be realized by virtue of the shell. By arranging the light-transmitting opening in the shell, the position and the size of the light-transmitting opening can be controlled conveniently, assembling alignment of the cover plate is facilitated, the needed cover plate can be arranged more flexibly, and the influence on light caused by the assembling alignment problem can be improved. Therefore, according to the fingerprint identification module provided by the embodiment of the invention, the identification capability of the fingerprint identification module is improved, and the assembly of the fingerprint identification module is also facilitated.

Description

Technical Field

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

[0002] Optical fingerprint recognition technology obtains fingerprint information by collecting light signals reflected or scattered by the finger, and compares the obtained fingerprint information with the stored fingerprint information to achieve fingerprint recognition. The recognition ability of the current fingerprint recognition module needs to be improved. Summary of the invention

[0003] Based on this, it is necessary to provide a fingerprint recognition module and electronic device to improve recognition capabilities.

[0004] According to one aspect of the present application, an embodiment of the present application provides a fingerprint recognition module, including:

[0005] A substrate having a first surface and a second surface opposite to each other;

[0006] A shell is provided on the first surface and electrically connected to the substrate; the shell and the substrate define a receiving cavity, the shell includes a first wall arranged opposite to the substrate, the first wall is provided with a light-transmitting opening communicating with the receiving cavity; the area of ​​the first surface located in the receiving cavity includes a first area opposite to the light-transmitting opening, and a second area arranged around the first area;

[0007] An imaging lens module, disposed in the first area and electrically connected to the substrate;

[0008] A plurality of light sources are disposed in the second area; the light sources are electrically connected to the substrate and are capable of emitting light to the light-transmitting opening; and

[0009] The cover plate is arranged on a side of the first wall away from the base plate and covers the light-transmitting opening.

[0010] In one embodiment, all of the light sources are arranged in pairs;

[0011] The arrangement directions of the two light sources arranged in a pair are perpendicular to the direction from the first surface to the second surface.

[0012] In one embodiment, the cover plate has a first surface disposed toward the substrate, and the first surface has an open area exposed through the light-transmitting opening;

[0013] The incident angle ɵ of the light emitted by the light source in the open area satisfies the following conditions:

[0014] , and 30°<ɵ<68°;

[0015] Wherein, D1 is the distance between any two light sources arranged in a pair, D2 is the aperture of the light-transmitting port, H is the distance between the cover plate and the first surface, and h is the distance between the center of the light source and the first surface.

[0016] In one of the embodiments, the refractive index of the cover plate is 1.5, and the incident angle ɵ satisfies: 43°<ɵ<64°.

[0017] In one of the embodiments, the fingerprint recognition module further includes at least one polarizer disposed in the accommodating cavity;

[0018] The polarizer is arranged on a light path formed by the outgoing light of the light source; the light path is a path formed by the light passing through the light transmission port to the object to be measured and reflected to the imaging lens module.

[0019] In one of the embodiments, a slot is defined in the housing and is located in the accommodating cavity, and the polarizer is snap-fitted into the slot.

[0020] In one embodiment, a plurality of polarizers are provided, and all the polarizers are provided in one-to-one correspondence with all the light sources; the polarizers are provided on the light path between the corresponding light source and the imaging lens module; or

[0021] The polarizer is disposed in the imaging lens module, and the polarizer is configured to be able to filter; or

[0022] There are multiple polarizers, and among all the polarizers, there are polarizers arranged on the light path between the light source and the cover plate, and polarizers arranged on the light path between the cover plate and the imaging lens module.

[0023] In one embodiment, the housing comprises:

[0024] A body, disposed on the first surface; the body and the substrate define the accommodating cavity, and the body includes the first wall; and

[0025] The conductive connection layer is disposed on a surface of the first wall that is away from the substrate and is connected to the substrate; the conductive connection layer is configured to be able to conduct electricity.

[0026] In one embodiment, the material of the conductive connection layer includes conductive foam, conductive double-sided tape or conductive silicone.

[0027] In one embodiment, the fingerprint recognition module further includes a plurality of mounting parts, and all the mounting parts are arranged in one-to-one correspondence with all the light sources;

[0028] The light source is installed in the second area by means of the corresponding mounting member, the mounting member is configured to allow a preset distance between the center of the light source and the first surface, and the mounting member electrically connects the corresponding light source and the substrate.

[0029] In one embodiment, an ink layer is provided on a surface of the cover plate facing the substrate;

[0030] The ink layer is configured to allow visible light within a preset wavelength band to penetrate, and the preset wavelength band includes 420 nanometers to 480 nanometers, 500 nanometers to 580 nanometers, 600 nanometers to 680 nanometers, and 750 nanometers to 900 nanometers.

[0031] In one embodiment, the light source comprises a vertical cavity surface emitting laser or a light emitting diode.

[0032] In one embodiment, the light source includes a light emitting diode, and the light emitting diode is manufactured by a side-lit packaging process.

[0033] In one embodiment, the material of the housing includes conductive plastic or metal; and / or

[0034] The housing is fixedly connected to the substrate by means of screws or colloid; and / or

[0035] The fingerprint recognition module further includes a bonding layer bonding the cover plate and the first wall, wherein the bonding layer is configured to be conductive; and / or

[0036] The imaging lens module includes a collimator module; and / or

[0037] The central axis of the imaging lens module coincides with the central axis of the light transmission port.

[0038] According to another aspect of the present application, an embodiment of the present application provides an electronic device, comprising the fingerprint recognition module in any of the above embodiments.

[0039] In the above-mentioned fingerprint recognition module and electronic device, the fingerprint recognition module at least includes a substrate, a shell, an imaging lens module, multiple light sources and a cover plate. By setting a shell that matches the substrate, not only can the shell be used to block external dirt from contaminating the components in the accommodating cavity, but the shell can also be used to achieve a touch connection function. By setting a light-transmitting port on the shell, it is convenient to control the position and size of the light-transmitting port, which is not only conducive to the assembly and alignment of the cover plate, but also allows for more flexible setting of the required cover plate, and can also improve the impact of assembly alignment problems on light. Therefore, the fingerprint recognition module provided in the embodiment of the present application is not only conducive to improving the recognition ability of the fingerprint recognition module, but also conducive to the assembly of the fingerprint recognition module.

[0040] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1 A schematic cross-sectional view of a fingerprint recognition module provided in one embodiment of the present application;

[0043] Figure 2 A schematic diagram of the three-dimensional structure of a fingerprint recognition module provided in an embodiment of the present application after removing the cover plate at a viewing angle;

[0044] Figure 3 A schematic diagram of a cross-sectional three-dimensional structure of a fingerprint recognition module provided in an embodiment of the present application after removing the cover plate at another viewing angle;

[0045] Figure 4 A schematic diagram of incident angle versus reflectivity of a fingerprint recognition module in p-polarization state and s-polarization state provided in one embodiment of the present application;

[0046] Figure 5 A partial cross-sectional enlarged structural diagram of the matching polarizer and housing in a fingerprint recognition module provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the three-dimensional structure of a fingerprint recognition module provided in another embodiment of the present application after removing the cover plate at a certain viewing angle.

[0048] Description of reference numerals:

[0049] Fingerprint recognition module 100;

[0050] Substrate 110, first surface m1, first region z1, second region z2, second surface m2;

[0051] Shell 120, accommodating cavity Q, first wall b1, light-transmitting port k, body 121, conductive connection layer 122, card slot c;

[0052] An imaging lens module 130;

[0053] Light source 140;

[0054] Cover plate 150, first surface w, open area z3, adhesive layer n;

[0055] Polarizer 160;

[0056] Mounting member 170;

[0057] The distance D1 between any two light sources 140 arranged in a pair; the distance H between the cover plate 150 and the first surface m1, the distance h between the center of the light source 140 and the first surface m1, the aperture D2 of the light transmission port k, the incident angle ɵ, and the central axis L;

[0058] The first direction F1, the second direction F2, and the third direction F3. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Figure 1 A schematic cross-sectional view of a fingerprint recognition module 100 provided in one embodiment of the present application is shown; Figure 2 A schematic diagram of the three-dimensional structure of the fingerprint recognition module 100 provided in one embodiment of the present application after removing the cover plate 150 at a viewing angle is shown; Figure 3 A schematic diagram of a cross-sectional three-dimensional structure of a fingerprint recognition module 100 provided in an embodiment of the present application after removing the cover plate 150 at another viewing angle is shown; for ease of explanation, only contents related to the embodiment of the present application are shown.

[0066] Please refer to Figures 1 to 3 The embodiment of the present application provides a fingerprint recognition module 100, including a substrate 110, a housing 120, an imaging lens module 130, a plurality of light sources 140 and a cover plate 150.

[0067] The substrate 110 is a component used to carry other components in the fingerprint recognition module 100. The substrate 110 can be an FPC (Flexible Printed Circuit) or a PCB (Printed Circuit Board). The substrate 110 is provided with chips and circuits, which can cooperate to realize functions such as sensing fingerprints and comparing fingerprints. The substrate 110 has a first surface m1 and a second surface m2 that are arranged opposite to each other. The first surface m1 and the second surface m2 are arranged opposite to each other along a first direction F1, and the first direction F1 is the thickness direction of the substrate 110.

[0068] The housing 120 is disposed on the first surface m1 and is electrically connected to the substrate 110. The housing 120 and the substrate 110 define a receiving cavity Q. The housing 120 includes a first wall b1 disposed opposite to the substrate 110, and a light-transmitting port k communicating with the receiving cavity Q is provided on the first wall b1. The area of ​​the first surface m1 located in the receiving cavity Q includes a first area z1 opposite to the light-transmitting port k, and a second area z2 disposed around the first area z1. The first area z1 can be roughly regarded as the middle area of ​​the first surface m1, and the second area z2 can be roughly regarded as the edge area of ​​the first surface m1.

[0069] The imaging lens module 130 is a component for receiving light and forming an image. The imaging lens module 130 is disposed in the first area z1 and is electrically connected to the substrate 110. The light source 140 is a component for providing light. The plurality of light sources 140 are disposed in the second area z2, the light sources 140 are electrically connected to the substrate 110, and can emit light to the light transmission port k.

[0070] The cover plate 150 is arranged on the side of the first wall b1 away from the substrate 110, and covers the light-transmitting opening k. The cover plate 150 can completely cover the first wall b1. The material of the cover plate 150 can be glass material or plastic material. In the case where the material of the cover plate 150 is glass material, the cover plate 150 can be a chemically or physically strengthened plate, or it can be an unstrengthened plate. In the case where the material of the cover plate 150 is plastic material, the material of the cover plate 150 can be polycarbonate (PC) or polymethylmethacrylate (PMMA), etc. It can be set according to the specific usage, and no specific limitation is made here.

[0071] Therefore, by providing a shell 120 that matches the substrate 110, not only can the shell 120 be used to block external dirt from contaminating the components in the accommodating cavity Q, but the shell 120 can also be used to achieve a touch connection function. By providing a light-transmitting port k on the shell 120, it is convenient to control the position and size of the light-transmitting port k, which is not only beneficial to the assembly alignment of the cover plate 150, but also allows for more flexible arrangement of the required cover plate 150, and can also improve the impact of assembly alignment problems on light. Therefore, the fingerprint recognition module 100 provided in the embodiment of the present application is not only beneficial to improving the recognition capability of the fingerprint recognition module 100, but also beneficial to the assembly of the fingerprint recognition module 100.

[0072] It should be noted that, since the fingerprint recognition method can provide convenience, the application of fingerprint recognition modules is becoming more and more widespread. The application of fingerprint recognition modules has gradually spread from indoors to outdoors, so the waterproof demand for fingerprint recognition modules has gradually increased. In the embodiment of the present application, since the shell 120 can be used to prevent external dirt from contaminating the components located in the accommodating cavity Q, it is beneficial to improve the recognition ability of the fingerprint module in different outdoor environments (such as rainy days, etc.), thereby enabling the fingerprint recognition module 100 provided in the embodiment of the present application to be used in different outdoor environments.

[0073] In some embodiments, please refer to Figures 1 to 3 , all light sources 140 are arranged in pairs. The arrangement direction of the two light sources 140 arranged in pairs is perpendicular to the direction from the first surface m1 to the second surface m2. That is, the arrangement direction of the two light sources 140 arranged in pairs is perpendicular to the first direction F1.

[0074] Specifically, Figures 1 to 3 For example, four light sources 140 are provided. Two of the light sources 140 are arranged oppositely along the second direction F2, and it can be seen that the two light sources 140 are arranged in pairs. The other two light sources 140 are arranged oppositely along the third direction F3, and it can be seen that the two light sources 140 are arranged in pairs. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. Of course, the light sources 140 can also be provided in other numbers, and can also be arranged in pairs in other directions perpendicular to the first direction F1. Further, all light sources 140 can be evenly arranged around the imaging lens device, and the recognition ability can be further improved by means of uniform light. It can be set according to specific usage conditions, and no specific restrictions are made here. Correspondingly, the shape of the housing 120 can be adjusted according to the arrangement of the light sources 140, or it can not be adjusted according to the arrangement of the light sources 140. For example, the shape of the housing 120 can be roughly a regular octagon, a cube or a cylinder, etc. It can be set according to actual usage conditions, and no specific restrictions are made here.

[0075] In this way, the imaging accuracy of the imaging lens device can be improved by controlling the arrangement of the light source 140 , thereby facilitating the improvement of the recognition capability of the fingerprint recognition module 100 .

[0076] In some embodiments, please refer to Figure 1 The cover plate 150 has a first surface w disposed toward the substrate 110, and the first surface w has an open area z3 exposed through the light-transmitting opening k. The incident angle ɵ of the light emitted by the light source 140 in the open area z3 satisfies the following conditions:

[0077] , and 30°<ɵ<68°;

[0078] Wherein, D1 is the distance between any two light sources 140 arranged in a pair, D2 is the aperture of the light-transmitting port k, H is the distance between the cover plate 150 and the first surface m1, and h is the distance between the center of the light source 140 and the first surface m1.

[0079] Specifically, the inventors of the present application have discovered through research that better imaging effects can be obtained by controlling the size of the incident angle ɵ of the light emitted by the light source 140 in the open area z3. Furthermore, the relative position relationship between the various components of the fingerprint recognition module 100 can be more accurately determined based on the size of the incident angle ɵ. On this basis, the inventors of the present application have constructed the conditions satisfied by the incident angle ɵ of the light emitted by the light source 140 in the open area z3 shown above, which can make the interface reflection of the light lower, thereby being able to reduce interference with the image to a greater extent. Combined with reference to Figure 4 , Figure 4 The schematic diagram of the incident angle ɵ versus reflectivity of the fingerprint recognition module 100 provided by an embodiment of the present application in the p polarization state (i.e., the line indicated by Rp) and the s polarization state (i.e., the line indicated by Rs) is shown. It can be seen that by using light in the p polarization state, blocking light in the s polarization state, and using light in a wide angle range, the incident angle ɵ is approximately in the range of 30°<ɵ<68°, at which time the interface reflection of the light can be minimized, so that the image is least disturbed. For example, the incident angle ɵ can be 31°, 40°, 43°, 50°, or 65°.

[0080] In this way, by controlling the relative position relationship between the components of the fingerprint recognition module 100 based on the incident angle ɵ, the influence obtained by the imaging lens module 130 can be less interfered, which is beneficial to improving the recognition ability of the fingerprint recognition module 100.

[0081] In some embodiments, please refer to Figure 1 and Figure 4, the refractive index of the cover plate 150 is 1.5, and the incident angle ɵ satisfies: 43°<ɵ<64°. For example, the incident angle ɵ may be 44°, 48°, 50°, 55°, 60°, or 63°.

[0082] In this way, the relative position relationship between the components of the fingerprint recognition module 100 can be further controlled by controlling the incident angle ɵ, thereby further improving the recognition capability of the fingerprint recognition module 100.

[0083] In some embodiments, please refer to Figures 1 to 4 The fingerprint recognition module 100 further includes at least one polarizer 160 disposed in the accommodating cavity Q. The polarizer 160 is disposed on a light path formed by the outgoing light of the light source 140. The light path is a path formed by the light passing through the light transmission port k to the object to be detected and reflected to the imaging lens module 130.

[0084] Thus, by setting the polarizer 160, the polarization state of the light can be adjusted, thereby eliminating the interference of light from other directions, making the characteristics of the light more clear and easier to control. The polarizer 160 can be set at any position on the above light path according to the use requirements, and is not specifically limited here.

[0085] Figure 5 A partial cross-sectional enlarged structural schematic diagram of the matching polarizer 160 and housing 120 in a fingerprint recognition module 100 provided in an embodiment of the present application is shown; for ease of explanation, only the contents related to the embodiment of the present application are shown.

[0086] In some embodiments, please refer to Figures 1 to 3 , and combined with reference Figure 5 A card slot c is defined in the housing 120 and is located in the accommodating cavity Q, and the polarizer 160 is snap-fitted into the card slot c.

[0087] In this way, the housing 120 is used to form the slot c, which facilitates the assembly of the polarizer 160 .

[0088] In some embodiments, please refer to Figures 1 to 3 , a plurality of polarizers 160 are provided, all polarizers 160 are provided in one-to-one correspondence with all light sources 140, and polarizer 160 is provided on the light path between the corresponding light source 140 and the imaging lens module; or, polarizer 160 is provided in the imaging lens module 130, and polarizer 160 is configured to be able to filter; or, a plurality of polarizers 160 are provided, and among all polarizers 160, there are polarizers 160 provided on the light path between the light source 140 and the cover plate 150, and there are polarizers 160 provided on the light path between the cover plate 150 and the imaging lens module.

[0089] For example, Figures 1 to 3As an example, it is illustrated that all polarizers 160 are arranged in one-to-one correspondence with all light sources 140 , and the polarizers 160 are arranged between the corresponding light sources 140 and the imaging lens module.

[0090] In this way, the polarizer 160 can be flexibly arranged according to the use requirements, as long as the polarizer 160 is located on the light path mentioned above, and no specific limitation is made here.

[0091] Figure 6 This is a schematic diagram of the three-dimensional structure of the fingerprint recognition module 100 provided in another embodiment of the present application after removing the cover plate 150 at a certain viewing angle.

[0092] In some embodiments, please refer to Figure 6 The housing 120 includes a body 121 and a conductive connection layer 122. The body 121 is disposed on the first surface m1, and the body 121 and the substrate 110 define a receiving cavity Q. The body 121 includes a first wall b1. The conductive connection layer 122 is disposed on a side surface of the first wall b1 away from the substrate 110, and is connected to the substrate 110. The conductive connection layer 122 is configured to be conductive.

[0093] In this way, not only can the shell 120 be electrically connected to the substrate 110, but the air between the first wall b1 and the cover plate 150 can also be absorbed, thereby improving the tightness of the fit between the cover plate 150 and the first wall b1, thereby further improving the tolerances generated when assembling the components, improving the touch stability of the fingerprint recognition module 100, and thus further improving the reliability of the fingerprint recognition module 100.

[0094] In some embodiments, please refer to Figure 6 The material of the conductive connection layer 122 includes conductive foam, conductive double-sided tape or conductive silicone. Conductive foam has the advantages of good conductivity, flame retardancy, compressibility and easy processing. Conductive double-sided tape has good conductivity and can establish a conductive path between two bonded objects. Conductive double-sided tape can be made of conductive particles (such as metal particles such as silver and copper) dispersed in an adhesive. These conductive particles contact each other to form a conductive network, thereby realizing the conduction of current. Conductive silicone is a silicone material in which conductive particles such as silver-coated copper powder and nickel-coated graphite powder are evenly distributed in silicone to make it have conductive properties. In addition to the advantages of good conductivity, flame retardancy, compressibility and easy processing, conductive silicone also has good weather resistance and a long service life.

[0095] The material of the conductive connection layer 122 can be flexibly set according to usage requirements and is not specifically limited here.

[0096] In some embodiments, please refer to Figure 1 and Figure 2, the material of the entire housing 120 is set to be a conductive material. Exemplarily, the material of the housing 120 includes conductive plastic or metal. Conductive plastic is a functional polymer material made by uniformly dispersing a plastic substrate and a conductive filler through plastic processing. Conductive plastic has the characteristics and conductive properties of plastic, and has certain advantages such as conductivity, light weight, easy processing and molding, and corrosion resistance. Metal has certain guidance, ductility and reliability.

[0097] The material of the entire housing 120 can be flexibly set according to usage requirements, and no specific limitation is made here.

[0098] In this way, through some of the embodiments illustrated above, the housing 120 is configured to be electrically connected to the substrate 110 , so that the chip on the substrate 110 can sense whether a finger is in contact with the cover 150 .

[0099] In some embodiments, please refer to Figure 1 The fingerprint recognition module 100 further includes a plurality of mounting members 170, and all mounting members 170 are arranged in one-to-one correspondence with all light sources 140. The light sources 140 are mounted in the second area z2 by means of corresponding mounting members 170, and the mounting members 170 are configured so that there is a preset distance between the center of the light source 140 and the first surface m1, and the mounting members 170 are electrically connected to the corresponding light sources 140 and the substrate 110.

[0100] In this way, the position of the light source 140 can be adjusted by providing the mounting member 170. For example, the mounting member 170 can adjust the position of the light source 140 in the form of a packaging member.

[0101] In some embodiments, an ink layer (not shown) is disposed on a surface of the cover plate 150 facing the substrate 110. The ink layer is configured to allow visible light in a preset wavelength band to penetrate, and the preset wavelength band includes 420 nanometers to 480 nanometers, 500 nanometers to 580 nanometers, 600 nanometers to 680 nanometers, and 750 nanometers to 900 nanometers. For example, blue light, green light, red light, or infrared light can pass through the ink layer.

[0102] In this way, the ink layer can be provided to further improve the resistance to the influence of external light (such as sunlight), and the contrast can be improved. In addition, the ink layer can be used to provide relevant patterns according to usage requirements to improve the aesthetics.

[0103] In some embodiments, please refer to Figure 1 The light source 140 includes a vertical cavity surface emitting laser (VCSEL) or a light emitting diode (LED).

[0104] A vertical cavity surface emitting laser is a semiconductor laser that emits laser light perpendicular to the top surface. A light emitting diode is a semiconductor device that can convert electrical energy into visible light.

[0105] The type of light source 140 can be flexibly selected according to usage requirements and is not specifically limited here.

[0106] In some embodiments, please refer to Figure 1 The light source 140 includes a light emitting diode, which is manufactured by a side-light packaging process. In this way, the position of the light source 140 can be adjusted by the packaging method, thereby adjusting the aforementioned distance h.

[0107] In some embodiments, please refer to Figure 1 The housing 120 is fixedly connected to the substrate 110 by means of screws or colloid.

[0108] In this way, the method of fixing the shell 120 and the substrate 110 can be flexibly selected according to actual usage conditions, and no specific limitation is made here.

[0109] In some embodiments, please refer to Figure 1 , the fingerprint recognition module 100 also includes an adhesive layer n for bonding the cover plate 150 and the first wall b1, and the adhesive layer n is configured to be conductive. The adhesive layer n can be a conductive double-sided adhesive. Specifically, a touch circuit layer can also be provided on the cover plate 150, and the touch circuit layer can be set at a desired position according to usage requirements, for example, it can cooperate with the aforementioned ink layer to provide other functions such as numeric key functions. In this way, not only can the cover plate 150 and the first wall b1 be connected, but also the signal of whether the finger touches the cover plate 150 can be transmitted to the chip on the substrate 110.

[0110] In some embodiments, please refer to Figure 1 The imaging lens module 130 includes a collimator module. The collimator module has the advantages of collimating the light beam, adjusting the direction and position of the light beam, focusing or expanding the light beam, improving the coupling efficiency of the light beam, and reducing the complexity and cost of the optical system. Of course, the imaging lens module 130 can also be a two-piece, three-piece, or four-piece lens architecture.

[0111] It can be set according to the specific usage and is not specifically limited here.

[0112] In some embodiments, please refer to Figure 1 , the central axis of the imaging lens module 130 coincides with the central axis of the light transmission port k. That is, the central axis of the imaging lens module 130 coincides with the central axis of the light transmission port k at the central axis L. In this way, it is beneficial for the imaging lens module 130 to be able to capture images in all directions as evenly as possible.

[0113] Based on the same inventive concept, an embodiment of the present application provides an electronic device, comprising the fingerprint recognition module 100 in any of the above embodiments.

[0114] The advantages possessed by the fingerprint recognition module 100 mentioned above are also possessed by the electronic device, which will not be elaborated here.

[0115] It should be noted that the electronic device may be a mobile phone, a laptop computer, a smart home product, an electric car, a motorcycle, an electric bicycle, etc. It may be applied according to specific usage conditions and is not specifically limited here.

[0116] 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.

[0117] 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 fingerprint recognition module, characterized in that: include: A substrate having a first surface and a second surface opposite to each other; A shell is provided on the first surface and electrically connected to the substrate; the shell and the substrate define a receiving cavity, the shell includes a first wall arranged opposite to the substrate, the first wall is provided with a light-transmitting opening communicating with the receiving cavity; the area of ​​the first surface located in the receiving cavity includes a first area opposite to the light-transmitting opening, and a second area arranged around the first area; An imaging lens module, disposed in the first area and electrically connected to the substrate; A plurality of light sources are disposed in the second area; the light sources are electrically connected to the substrate and are capable of emitting light to the light-transmitting opening; and The cover plate is arranged on a side of the first wall away from the base plate and covers the light-transmitting opening.

2. The fingerprint recognition module according to claim 1, characterized in that: All of the light sources are arranged in pairs; The arrangement directions of the two light sources arranged in a pair are perpendicular to the direction from the first surface to the second surface.

3. The fingerprint recognition module according to claim 1, characterized in that: The cover plate has a first surface disposed toward the substrate, and the first surface has an open area exposed through the light-transmitting opening; The incident angle ɵ of the light emitted by the light source in the open area satisfies the following conditions: , and 30°<ɵ<68°; Wherein, D1 is the distance between any two light sources arranged in a pair, D2 is the aperture of the light-transmitting port, H is the distance between the cover plate and the first surface, and h is the distance between the center of the light source and the first surface.

4. The fingerprint recognition module according to claim 3, characterized in that: The refractive index of the cover plate is 1.5, and the incident angle ɵ satisfies: 43°<ɵ<64°.

5. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The fingerprint recognition module further includes at least one polarizer disposed in the accommodating cavity; The polarizer is arranged on a light path formed by the outgoing light of the light source; the light path is a path formed by the light passing through the light transmission port to the object to be measured and reflected to the imaging lens module.

6. The fingerprint recognition module according to claim 5, characterized in that: The housing defines a slot located in the accommodating cavity, and the polarizer is snap-fitted into the slot.

7. The fingerprint recognition module according to claim 5, characterized in that: There are multiple polarizers, and all the polarizers are arranged in one-to-one correspondence with all the light sources; the polarizers are arranged on the light path between the corresponding light source and the imaging lens module; or The polarizer is disposed in the imaging lens module, and the polarizer is configured to be able to filter; or There are multiple polarizers, and among all the polarizers, there are polarizers arranged on the light path between the light source and the cover plate, and polarizers arranged on the light path between the cover plate and the imaging lens module.

8. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The housing comprises: A body, disposed on the first surface; the body and the substrate define the accommodating cavity, and the body includes the first wall; and The conductive connection layer is disposed on a surface of the first wall that is away from the substrate and is connected to the substrate; the conductive connection layer is configured to be able to conduct electricity.

9. The fingerprint recognition module according to claim 8, characterized in that: The material of the conductive connection layer includes conductive foam, conductive double-sided tape or conductive silicone.

10. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The fingerprint recognition module further includes a plurality of mounting parts, and all the mounting parts are arranged in a one-to-one correspondence with all the light sources; The light source is installed in the second area by means of the corresponding mounting member, the mounting member is configured to allow a preset distance between the center of the light source and the first surface, and the mounting member electrically connects the corresponding light source and the substrate.

11. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: An ink layer is provided on a surface of the cover plate facing the substrate; The ink layer is configured to allow visible light within a preset wavelength band to penetrate, and the preset wavelength band includes 420 nanometers to 480 nanometers, 500 nanometers to 580 nanometers, 600 nanometers to 680 nanometers, and 750 nanometers to 900 nanometers.

12. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The light source includes a vertical cavity surface emitting laser or a light emitting diode.

13. The fingerprint recognition module according to claim 12, characterized in that: The light source comprises a light emitting diode, and the light emitting diode is manufactured by a side-light packaging process.

14. The fingerprint recognition module according to any one of claims 1 to 4, characterized in that: The material of the housing includes conductive plastic or metal; and / or The housing is fixedly connected to the substrate by means of screws or colloid; and / or The fingerprint recognition module further includes a bonding layer bonding the cover plate and the first wall, wherein the bonding layer is configured to be conductive; and / or The imaging lens module includes a collimator module; and / or The central axis of the imaging lens module coincides with the central axis of the light transmission port.

15. An electronic device, characterized in that: Comprising a fingerprint recognition module as described in any one of claims 1-14.

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