Light-emitting fingerprint module and fingerprint identification device

Abstract

The utility model discloses a light-emitting fingerprint module and a fingerprint identification device, and relates to the technical field of fingerprint modules. The light-emitting fingerprint module comprises a fingerprint sensor, a circuit board, a light source and a light guide column, the fingerprint sensor is attached to the surface of the circuit board, and the output end of the fingerprint sensor is electrically connected with the input end of the circuit board; the light source is fixedly arranged on the circuit board, the control end of the light source is electrically connected with the output end of the circuit board, and a groove is formed in the light guide column; when the light guide column is fixedly connected with the circuit board, the groove covers the light source. The light guide column is provided with the groove, and when the light guide column is fixedly connected with the circuit board, the groove covers the light source, so that light of the light source is more uniform, and the problems that in the prior art, the light guide effect is poor due to the fact that the structural design of the light source and the light guide column is unreasonable are solved. And the light guide effect of the light-emitting module is improved.

Description

Technical Field

[0001] This utility model belongs to the field of fingerprint module technology, and in particular relates to a light-emitting fingerprint module and a fingerprint recognition device. Background Technology

[0002] With the continuous development of smart lock technology, more and more luminous fingerprint modules are being applied to smart locks. For example... Figure 1 As shown, the existing light-emitting fingerprint module includes a first light guide post 101, a first metal ring 102, a first PCB board 103, a first fingerprint sensor 104, a first light source 105, a first patch device 106, and a first connector 107. The first fingerprint sensor 104 is fixed to the upper surface of the first PCB board 103, the first patch device 106 and the first connector 107 are disposed on the lower surface of the PCB board 103, the first metal ring 102 is fixed to the upper surface of the first PCB board 103, the first light source 105 is mounted on the lower surface of the first PCB board 103, the first light guide post 101 is hollow and is bonded to the first metal ring 102 and the first PCB board 103.

[0003] Existing luminescent fingerprint modules require numerous components, such as decorative metal rings, resulting in complex structures, numerous assembly processes, and high manufacturing costs. Furthermore, the unreasonable design of the light source and light guide post leads to poor light guiding performance. Additionally, the insufficient bonding area of ​​the light guide post results in poor adhesive application, making the module structurally weak. Therefore, there is an urgent need for a new luminescent fingerprint module and fingerprint recognition device to overcome the shortcomings of existing technologies. Utility Model Content

[0004] The present invention aims to provide a light-emitting fingerprint module and a fingerprint recognition device to solve the above-mentioned technical problems. By setting a groove to cover the light source in the light guide column, the light guiding effect of the light-emitting fingerprint module is improved.

[0005] To address the aforementioned technical problems, this utility model provides a light-emitting fingerprint module, comprising a fingerprint sensor, a circuit board, and a light source. The fingerprint sensor is attached to the surface of the circuit board, and its output terminal is electrically connected to the input terminal of the circuit board. The light source is fixedly mounted on the circuit board, and its control terminal is electrically connected to the output terminal of the circuit board. The module is characterized by further including a light guide post with a groove. When the light guide post is fixedly connected to the circuit board, the groove covers the light source.

[0006] It is understandable that, compared with the prior art, this utility model sets a groove on the light guide post, and when the light guide post is fixedly connected to the circuit board, the groove covers the light source. By covering the light source with the groove of the light guide post, the light from the light source is more uniform, which avoids the poor light guiding effect caused by the unreasonable structural design of the light source and the light guide post in the prior art, and improves the light guiding effect of the light-emitting module.

[0007] As a preferred embodiment, the upper surface of the light guide post is provided with an inclined surface; the inclined surface is inclined to the upper surface of the fingerprint sensor.

[0008] This preferred solution eliminates the need for a metal ring by setting a bevel on the upper surface of the light guide post, thus reducing the number of manufacturing components and simplifying the production process, thereby lowering manufacturing costs.

[0009] As a preferred embodiment, the lower surface of the light guide post is provided with a tube wall; the tube wall is attached to the side of the circuit board.

[0010] This preferred solution increases the contact area between the light guide column and the circuit board by setting a tube wall on the lower surface of the light guide column and making the tube wall fit against the circuit board, resulting in a better fit and thus improving the stability of the light-emitting fingerprint module.

[0011] As a preferred embodiment, the lower surface of the fingerprint sensor is attached to the upper surface of the circuit board; the lower surface of the light guide post is attached to the upper surface of the circuit board; the light guide post is attached to the side of the fingerprint sensor; and the lower surface of the light source is attached to the upper surface of the circuit board.

[0012] This preferred solution integrates the fingerprint sensor, light guide post, and circuit board, resulting in a larger bonding area for the luminescent fingerprint module compared to existing technologies. This leads to superior dispensing performance and improved durability of the luminescent fingerprint module.

[0013] As a preferred embodiment, the luminescent fingerprint module further includes a pad, the upper surface of which is attached to the lower surface of the fingerprint sensor; the lower surface of the pad is attached to the upper surface of the circuit board.

[0014] This preferred solution raises the height of the fingerprint sensor by placing a pad between the circuit board and the fingerprint sensor, thereby ensuring a smoother connection between the light guide column and the fingerprint sensor. The use of pads of different heights allows the luminous fingerprint module to adapt to different door lock structures, improving the user experience and the applicability of the luminous fingerprint module.

[0015] As a preferred embodiment, the circuit board includes: a PCB board, connectors, and surface mount devices;

[0016] The lower surface of the PCB board is bonded to the upper surface of the connector; the lower surface of the PCB board is bonded to the upper surface of the surface mount device; the upper surface of the PCB board is bonded to the lower surface of the light guide post; the upper surface of the PCB board is bonded to the lower surface of the pad; the upper surface of the pad is bonded to the lower surface of the fingerprint sensor; the side of the PCB board is bonded to the tube wall.

[0017] The surface mount device is electrically connected to the PCB board; the PCB board is electrically connected to the connector; the control terminal of the light source is electrically connected to the output terminal of the PCB board; the output terminal of the fingerprint sensor is electrically connected to the input terminal of the PCB board; and the output terminal of the connector serves as the output terminal of the luminescent fingerprint module.

[0018] As a preferred embodiment, the surface of the patch device is coated with a paint layer.

[0019] This preferred solution applies a coating layer to the surface mount device. The insulating properties of the coating layer reduce the risks of short circuits and electrical faults in the surface mount device, thereby improving its stability and consequently enhancing the stability of the luminescent fingerprint module.

[0020] As a preferred embodiment, the fingerprint sensor includes a sensing device and a signal processing circuit; the sensing device serves as the fingerprint signal input terminal of the luminescent fingerprint module; the output terminal of the sensing device is electrically connected to the input terminal of the signal processing circuit; and the output terminal of the signal processing circuit is electrically connected to the input terminal of the PCB board.

[0021] As a preferred embodiment, the surface of the sensing device is circular.

[0022] Accordingly, this utility model embodiment provides a fingerprint recognition device, including the luminescent fingerprint module, driving module and device switch as described above;

[0023] The fingerprint signal input terminal of the luminescent fingerprint module serves as the fingerprint input terminal of the fingerprint recognition device.

[0024] The output terminal of the luminescent fingerprint module is electrically connected to the input terminal of the driving module;

[0025] The output terminal of the drive circuit is electrically connected to the control terminal of the device switch. Attached Figure Description

[0026] Figure 1 : A schematic diagram of the structure of an existing light-emitting fingerprint module provided in an embodiment of this utility model;

[0027] Figure 2 : A schematic diagram of the structure of a light-emitting fingerprint module provided in an embodiment of this utility model;

[0028] Figure 3 : A connection diagram of a fingerprint sensor provided in an embodiment of this utility model;

[0029] Figure 4 : A schematic diagram of the structure of an adjustable-height luminescent fingerprint module provided in an embodiment of this utility model;

[0030] Figure 5 : A schematic diagram of the structure of a light-emitting fingerprint module without a metal ring provided in an embodiment of this utility model;

[0031] Figure 6 : A schematic diagram of the structure of a uniformly light-guiding luminescent fingerprint module provided in an embodiment of this utility model;

[0032] Figure 7 : A schematic diagram of the structure of a fingerprint recognition device provided in an embodiment of this utility model;

[0033] The reference numerals in the accompanying drawings are as follows: 101: First light guide post; 102: First metal ring; 103: First PCB board; 104: First fingerprint sensor; 105: First light source; 106: First surface mount device; 107: First connector; 201: Fingerprint sensor; 202: Light guide post; 203: Light source; 204: Tube wall; 205: PCB board; 206: Connector; 207: Surface mount device; 208: Pad; 2011: Sensing device; 2012: 2012; 301: Second light guide post; 302: Second surface mount device; 303: First... 2 PCB board; 304: Second fingerprint sensor; 305: Second pad; 306: Second connector; 307: Second light source; 401: Third light guide post; 402: Third surface mount device; 403: Third PCB board; 404: Third fingerprint sensor; 405: Third connector; 406: Third light source; 501: Fourth light guide post; 502: Fourth surface mount device; 503: Fourth PCB board; 504: Fourth fingerprint sensor; 505: Fourth connector; 506: Fourth light source; 601: Illuminated fingerprint module; 602: Driver module; 603: Device switch. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] With the continuous development of fingerprint recognition technology, existing fingerprint module products have become increasingly mature and are widely used in the field of smart door locks. However, existing fingerprint modules still have defects in structural adaptation and manufacturing processes. For example, current luminescent fingerprint modules are too large and too thick to recognize some thin door lock structures. In addition, the manufacturing process of luminescent fingerprint modules involves many components, making the production process complex and costly.

[0036] Specifically, before describing the luminescent fingerprint module of this embodiment, we will first describe the structure and manufacturing process of existing luminescent fingerprint modules. Firstly, existing luminescent fingerprint modules typically include a metal ring, a fingerprint sensor, a light source, surface mount components (SMCs / SMDs), a connector, a PCB board, and a light guide. The SMCs are directly soldered onto the PCB, reducing the number of wiring and connection points, thereby reducing signal transmission loss and interference and improving the overall performance of the electronic device. Connectors in luminescent fingerprint modules are typically used for electrical connections and signal transmission. With the development of fingerprint recognition technology, the metal ring has gradually evolved from its initial function of releasing static electricity and interrupting signals to a decorative ring. That is, in current luminescent fingerprint modules, the metal ring is usually used as a decorative ring to avoid a large sense of separation on the fingerprint sensor surface. Secondly, currently... Figure 1 The production process of the existing light-emitting fingerprint module shown is as follows: SMT assembly, underfilling, reflow oven, metal ring assembly, painting, board separation, light guide assembly, and testing. Among them, SMT assembly is to bond the first PCB board 103, the first surface mount device 106, and the first connector 107 together; underfilling is to apply underfill adhesive between the first fingerprint sensor 104 and the first PCB board 103; reflow oven refers to curing the underfill adhesive, and then assembling the metal ring.

[0037] like Figure 1As shown in the structural diagram of an existing luminescent fingerprint module, firstly, the bonding area of ​​the existing luminescent fingerprint module is too small, resulting in poor adhesive application and a risk of detachment of the first light guide post 101 and the first PCB board 103, thus making the luminescent fingerprint module unstable. Secondly, the first light source 105 of the existing luminescent fingerprint module is mounted on the lower surface of the first PCB board 103, which blocks the first light source 105, resulting in poor light emission performance. Furthermore, because the existing luminescent fingerprint module is concave, its overall thickness is too high, making it unsuitable for most door lock structures. Finally, the current luminescent fingerprint module requires the assembly of a metal ring during production, leading to excessively high production costs and complexity. Therefore, the luminescent fingerprint module proposed in this embodiment urgently needs to address the above-mentioned technical defects of the existing luminescent fingerprint module.

[0038] Example 1

[0039] Please refer to Figure 2 This is a schematic diagram of the structure of a light-emitting fingerprint module provided in an embodiment of the present invention. It includes a fingerprint sensor 201, a circuit board, and a light source 203. The fingerprint sensor 201 is attached to the surface of the circuit board, and its output end is electrically connected to the input end of the circuit board. The light source 203 is fixedly disposed on the circuit board, and its control end is electrically connected to the output end of the circuit board. It also includes a light guide post 202, which has a groove. When the light guide post 202 is fixedly connected to the circuit board, the groove covers the light source 203.

[0040] In this embodiment, the upper surface of the light guide post 202 is provided with an inclined surface; the inclined surface is inclined to the upper surface of the fingerprint sensor 201.

[0041] It should be noted that colored ink can be sprayed onto the sloping surface to create a decorative ring, which serves as a decorative surface for the luminous fingerprint module. This eliminates the need to install a metal ring in the existing luminous fingerprint module production process, thereby reducing assembly steps and manufacturing costs.

[0042] This embodiment eliminates the need for a metal ring by setting a bevel on the upper surface of the light guide post and using the bevel as the decorative surface of the luminous fingerprint module instead of a metal ring. This reduces the number of production components in the luminous fingerprint module, simplifies the production process, and lowers manufacturing costs.

[0043] In this embodiment, the lower surface of the light guide post 202 is provided with a tube wall 204; the tube wall 204 is attached to the side of the circuit board.

[0044] This embodiment improves the contact area between the light guide column and the circuit board by setting a tube wall on the lower surface of the light guide column and making the tube wall fit the circuit board, resulting in a better fit and thus improving the stability of the light-emitting fingerprint module.

[0045] In this embodiment, the lower surface of the fingerprint sensor 201 is attached to the upper surface of the circuit board; the lower surface of the light guide post 202 is attached to the upper surface of the circuit board; the light guide post 202 is attached to the side of the fingerprint sensor 201; and the lower surface of the light source 203 is attached to the upper surface of the circuit board.

[0046] This embodiment achieves a larger bonding area for the luminescent fingerprint module compared to existing technologies by bonding the fingerprint sensor, light guide post, and circuit board together. This results in a better dispensing effect for the luminescent fingerprint module and improves its robustness.

[0047] In this embodiment, the luminescent fingerprint module further includes a pad 208, the upper surface of which is attached to the lower surface of the fingerprint sensor 201; the lower surface of which is attached to the upper surface of the circuit board.

[0048] This embodiment raises the height of the fingerprint sensor by placing a pad between the circuit board and the fingerprint sensor, thereby ensuring a smoother connection between the light guide post and the fingerprint sensor and improving the user experience.

[0049] In this embodiment, the circuit board includes: a PCB board 205, a connector 206, and a surface mount device 207;

[0050] The lower surface of the PCB board 205 is attached to the upper surface of the connector 206; the lower surface of the PCB board 205 is attached to the upper surface of the surface mount device 207; the upper surface of the PCB board 205 is attached to the lower surface of the light guide post 202; the upper surface of the PCB board 205 is attached to the lower surface of the pad 208; the upper surface of the pad 208 is attached to the lower surface of the fingerprint sensor 201; the side of the PCB board 205 is attached to the tube wall 204.

[0051] The patch device 207 is electrically connected to the PCB board 205; the PCB board 205 is electrically connected to the connector 206; the control terminal of the light source 203 is electrically connected to the output terminal of the PCB board 205; the output terminal of the fingerprint sensor 201 is electrically connected to the input terminal of the PCB board 205; and the output terminal of the connector 206 serves as the output terminal of the luminescent fingerprint module.

[0052] In one optional embodiment, the PCB board 205 and the connector 206 are SMT bonded together; the PCB board 205 and the surface mount device 207 are SMT bonded together; the PCB board 205 and the light guide post 202 are bonded together with adhesive; the PCB board 205 and the tube wall 204 are bonded together with adhesive; the light guide post 202 and the fingerprint sensor 201 are bonded together with adhesive; the PCB board 205 and the pad 208 are SMT bonded together; and the pad 208 and the fingerprint sensor 201 are SMT bonded together.

[0053] In this embodiment, the surface of the patch device 207 is coated with a paint layer.

[0054] This embodiment improves the stability of the surface mount device by coating it with a varnish layer. The insulating properties of the varnish layer reduce the risk of short circuits and electrical faults in the surface mount device, thereby improving the stability of the surface mount device and the light-emitting fingerprint module.

[0055] In this embodiment, please refer to Figure 3 This is a connection diagram of a fingerprint sensor provided in an embodiment of the present utility model, as shown below. Figure 3 As shown, the fingerprint sensor includes a sensing device 2011 and a signal processing circuit 2012; the sensing device 2011 serves as the fingerprint signal input terminal of the luminescent fingerprint module; the output terminal of the sensing device 2011 is electrically connected to the input terminal of the signal processing circuit 2012; and the output terminal of the signal processing circuit 2012 is electrically connected to the input terminal of the PCB board 205.

[0056] In this embodiment, the surface of the sensing device 2011 is circular.

[0057] In an optional embodiment, the light source 203 is an LED light source.

[0058] In an optional embodiment, the height of the light source 203 is less than the height of the fingerprint sensor 201; the pad 208 is made of FR4 material, and the PCB board can be circular or square in shape.

[0059] This embodiment improves the light guiding effect of the fingerprint module by creating grooves on the light guide pillar, which cover the light source when the light guide pillar is fixedly connected to the circuit board. This results in more uniform light distribution and avoids the poor light guiding effect caused by unreasonable structural design of the light source and light guide pillar in the prior art. A bevel is created on the upper surface of the light guide pillar, replacing the metal ring as the decorative surface of the fingerprint module. This eliminates the need for a metal ring, reduces the number of manufacturing components, simplifies the production process, and lowers manufacturing costs. A varnish layer is applied to the surface mount device, and its insulating properties reduce the risk of short circuits and electrical faults, improving the stability of the surface mount device and thus the stability of the fingerprint module. A spacer is placed between the circuit board and the fingerprint sensor, raising the height of the fingerprint sensor and ensuring a smoother connection between the light guide pillar and the fingerprint sensor, improving the user experience.

[0060] Example 2

[0061] Please refer to Figure 4 This is a structural schematic diagram of an adjustable-height luminescent fingerprint module provided by an embodiment of the present invention; as shown below. Figure 4 As shown, the height-adjustable luminous fingerprint module includes: a second light guide post 301, a second patch device 302, a second PCB board 303, a second fingerprint sensor 304, a second pad 305, a second connector 306, and a second light source 307.

[0062] Specifically, the lower surface of the second light guide post 301 is attached to the upper surface of the second PCB board 303; the upper surface of the second PCB board 303 is attached to the lower surface of the second pad 305; the upper surface of the second pad 305 is attached to the lower surface of the second fingerprint sensor 304; the second light source 307 is fixed to the upper surface of the second PCB board 303; the second light guide post 301 is attached to the side of the second fingerprint sensor 304; the upper surface of the second patch device 302 is attached to the lower surface of the second PCB board 303; and the upper surface of the second connector 306 is attached to the lower surface of the second PCB board 303.

[0063] The second patch device 302 is electrically connected to the second PCB board 303; the second PCB board 303 is electrically connected to the second connector 306; the control terminal of the second light source 307 is electrically connected to the output terminal of the second PCB board 303; the output terminal of the second fingerprint sensor 304 is electrically connected to the input terminal of the second PCB board 303; and the output terminal of the second connector 306 serves as the output terminal of the luminescent fingerprint module.

[0064] In an optional embodiment, the upper surface of the second light guide post 301 is provided with an inclined surface; the inclined surface is inclined to the upper surface of the second fingerprint sensor 304.

[0065] This embodiment eliminates the need for a metal ring by setting a bevel on the upper surface of the second light guide post, thus reducing the number of production components and simplifying the production process, thereby lowering manufacturing costs.

[0066] In an alternative embodiment, the second pad 305 is made of FR4 material.

[0067] In one optional embodiment, the second PCB board 303 and the second connector 306 are SMT bonded together; the second PCB board 303 and the second surface mount device 302 are SMT bonded together; the second PCB board 303 and the second light guide post 301 are adhesive bonded together; the second light guide post 301 and the second fingerprint sensor 304 are adhesive bonded together; the second PCB board 303 and the second pad 305 are SMT bonded together; and the second pad 305 and the second fingerprint sensor 304 are SMT bonded together.

[0068] This embodiment incorporates a second pad between the second fingerprint sensor and the second PCB board. This pad raises the height of the fingerprint sensor, ensuring a smoother connection between the light guide post and the fingerprint sensor. Furthermore, the second pad allows for adjustment of the thickness of the luminous fingerprint module, enabling it to adapt to different door lock structures and improving the user experience. By fixing the second light source to the upper surface of the second PCB board, and directly bonding the lower surface of the second light guide post to the second PCB board, the contact area is increased, improving the adhesive application effect and thus enhancing the robustness of the luminous fingerprint module. By creating a bevel on the upper surface of the second light guide post, replacing the metal ring as the decorative surface of the luminous fingerprint module, the metal ring is eliminated, reducing the number of manufacturing components, simplifying the production process, and lowering manufacturing costs.

[0069] Example 3

[0070] Please refer to Figure 5 This is a schematic diagram of the structure of a light-emitting fingerprint module without a metal ring, provided by an embodiment of this utility model; as shown. Figure 4 As shown, it includes: a third light guide post 401, a third surface mount device 402, a third PCB board 403, a third fingerprint sensor 404, a third connector 405, and a third light source 406;

[0071] The upper surface of the third light guide post 401 is provided with an inclined surface; the inclined surface is inclined to the upper surface of the third fingerprint sensor 404;

[0072] The lower surface of the third light guide post 401 is attached to the upper surface of the third PCB board 403; the third light source 406 is fixed to the upper surface of the third PCB board 403; the upper surface of the third patch device 402 is attached to the lower surface of the third PCB board 403; the upper surface of the third connector 405 is attached to the lower surface of the third PCB board 403; the lower surface of the third fingerprint sensor 404 is attached to the upper surface of the third PCB board 403.

[0073] The third patch device 402 is electrically connected to the third PCB board 403; the third PCB board 403 is electrically connected to the third connector 405; the control terminal of the third light source 406 is electrically connected to the output terminal of the third PCB board 403; the output terminal of the third fingerprint sensor 404 is electrically connected to the input terminal of the third PCB board 403; and the output terminal of the third connector 405 serves as the output terminal of the luminescent fingerprint module.

[0074] In one optional embodiment, the third PCB board 403 and the third connector 405 are SMT bonded together; the third PCB board 403 and the third surface mount device 402 are SMT bonded together; the third PCB board 403 and the third light guide post 401 are bonded together by adhesive dispensing; and the third PCB board 403 and the third fingerprint sensor 404 are SMT bonded together.

[0075] In this embodiment, by fixing the third light source to the upper surface of the third PCB board and directly bonding the lower surface of the third light guide post to the third PCB board, the contact area is increased, the dispensing effect is improved, and thus the robustness of the luminescent fingerprint module is enhanced. By setting a bevel on the upper surface of the third light guide post, replacing the metal ring as the decorative surface of the luminescent fingerprint module, the metal ring is eliminated, reducing the number of manufacturing components and simplifying the production process, thereby lowering manufacturing costs. The bevel's tilt towards the upper surface of the third fingerprint sensor ensures the surface smoothness of the luminescent fingerprint module, improving the user experience.

[0076] Example 4

[0077] Please refer to Figure 6 The present invention provides a schematic diagram of a uniformly light-guiding luminescent fingerprint module, comprising: a fourth light guide post 501, a fourth patch device 502, a fourth PCB board 503, a fourth fingerprint sensor 504, a fourth connector 505, and a fourth light source 506.

[0078] The fourth light guide post 501 is provided with a groove; when the fourth light guide post 501 is fixedly connected to the fourth PCB board 503, the groove covers the fourth light source 506.

[0079] The lower surface of the fourth light guide post 501 is attached to the upper surface of the fourth PCB board 503; the fourth light source 506 is fixed to the upper surface of the fourth PCB board 503; the fourth light guide post 501 is attached to the side of the fourth fingerprint sensor 504; the upper surface of the fourth patch device 502 is attached to the lower surface of the fourth PCB board 503; the upper surface of the fourth patch device 502 is attached to the lower surface of the fourth PCB board 503; the lower surface of the fourth fingerprint sensor 504 is attached to the upper surface of the fourth PCB board 503.

[0080] The fourth patch device 502 is electrically connected to the fourth PCB board 503; the fourth PCB board 503 is electrically connected to the fourth connector 505; the control terminal of the fourth light source 506 is electrically connected to the output terminal of the fourth PCB board 503; the output terminal of the fourth fingerprint sensor 504 is electrically connected to the input terminal of the fourth PCB board 503; and the output terminal of the fourth connector 505 serves as the output terminal of the luminescent fingerprint module.

[0081] In an optional embodiment, the upper surface of the fourth light guide post 501 is provided with an inclined surface; the inclined surface is inclined to the upper surface of the fourth fingerprint sensor 504.

[0082] In one optional embodiment, the fourth PCB board 503 and the fourth connector 505 are SMT bonded together; the fourth PCB board 503 and the fourth surface mount device 502 are SMT bonded together; the fourth PCB board 503 and the fourth light guide post 501 are bonded together with adhesive; the fourth PCB board 503 and the fourth fingerprint sensor 504 are SMT bonded together; and the fourth light guide post 501 and the fourth fingerprint sensor 504 are bonded together with adhesive.

[0083] This embodiment eliminates the need for a metal ring by setting a bevel on the upper surface of the fourth light guide post, thus reducing the number of production components and simplifying the production process, thereby lowering manufacturing costs.

[0084] This embodiment features a groove on the fourth light guide post. When the fourth light guide post is fixedly connected to the fourth PCB board, the groove covers the fourth light source. This coverage of the fourth light source by the groove makes the light from the fourth light source more uniform, avoiding the poor light guiding effect caused by unreasonable structural design of the light source and light guide post in existing technologies, thus improving the light guiding effect of the light-emitting module. Furthermore, by providing a bevel on the upper surface of the fourth light guide post, replacing the metal ring as the decorative surface of the light-emitting fingerprint module, the metal ring is eliminated, reducing the number of manufacturing components and simplifying the production process, thereby lowering manufacturing costs.

[0085] Example 5

[0086] Please refer to Figure 7 This is a schematic diagram of the structure of a fingerprint recognition device provided in an embodiment of the present utility model, including the luminescent fingerprint module 601, the driving module 602 and the device switch 603 as described in the above embodiment;

[0087] The fingerprint signal input terminal of the luminescent fingerprint module 601 serves as the fingerprint input terminal of the fingerprint recognition device;

[0088] The output terminal of the luminescent fingerprint module 601 is electrically connected to the input terminal of the driving module 602;

[0089] The output terminal of the drive module 602 is electrically connected to the control terminal of the device switch 603.

[0090] The working principle of the fingerprint recognition device described in this embodiment is as follows: the user presses or touches the fingerprint signal input terminal of the light-emitting fingerprint module, the light-emitting fingerprint module collects the user's fingerprint signal and transmits it to the driver module; the driver module recognizes the fingerprint signal and sends a switch drive command to the control terminal of the device switch according to the recognition result, and the control terminal of the device switch controls the opening or closing of the fingerprint recognition device according to the switch drive command.

[0091] In summary, this embodiment of the invention improves the light guiding effect of the luminescent module by providing grooves on the light guide post, which cover the light source when the light guide post is fixedly connected to the circuit board. This results in more uniform light distribution and avoids the poor light guiding effect caused by unreasonable structural design of the light source and light guide post in existing technologies. Furthermore, by providing a bevel on the upper surface of the light guide post, replacing the metal ring as the decorative surface of the luminescent fingerprint module, the metal ring is eliminated, reducing the number of manufacturing components and simplifying the production process, thus lowering manufacturing costs. The coating of the surface mount device with a paint layer reduces the risk of short circuits and electrical faults due to the insulating properties of the paint layer, improving the stability of the surface mount device and consequently the stability of the luminescent fingerprint module. Finally, the placement of a pad between the circuit board and the fingerprint sensor raises the height of the fingerprint sensor, ensuring a smoother connection between the light guide post and the fingerprint sensor, thus improving the user experience.

[0092] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model by those skilled in the art should be included within the scope of protection of this utility model.

Claims

1. A light-emitting fingerprint module, comprising a fingerprint sensor, a circuit board, and a light source, wherein the fingerprint sensor is attached to the surface of the circuit board, and its output terminal is electrically connected to the input terminal of the circuit board; the light source is fixedly disposed on the circuit board, and its control terminal is electrically connected to the output terminal of the circuit board; characterized in that, It also includes a light guide post, which has a groove; when the light guide post is fixedly connected to the circuit board, the groove covers the light source.

2. The luminescent fingerprint module as described in claim 1, characterized in that, The upper surface of the light guide post is provided with an inclined surface; the inclined surface is inclined to the upper surface of the fingerprint sensor.

3. The luminescent fingerprint module as described in claim 1, characterized in that, The lower surface of the light guide post is provided with a tube wall; the tube wall is attached to the side of the circuit board.

4. The luminescent fingerprint module as described in claim 1, characterized in that, The lower surface of the fingerprint sensor is attached to the upper surface of the circuit board; the lower surface of the light guide post is attached to the upper surface of the circuit board; the light guide post is attached to the side of the fingerprint sensor; and the lower surface of the light source is attached to the upper surface of the circuit board.

5. A light-emitting fingerprint module as described in claim 3, characterized in that, It also includes a pad, the upper surface of which is attached to the lower surface of the fingerprint sensor; the lower surface of the pad is attached to the upper surface of the circuit board.

6. The luminescent fingerprint module as described in claim 5, characterized in that, The circuit board includes: a PCB board, connectors, and surface mount devices; The lower surface of the PCB board is bonded to the upper surface of the connector; the lower surface of the PCB board is bonded to the upper surface of the surface mount device; the upper surface of the PCB board is bonded to the lower surface of the light guide post; the upper surface of the PCB board is bonded to the lower surface of the pad; the upper surface of the pad is bonded to the lower surface of the fingerprint sensor; the side of the PCB board is bonded to the tube wall. The surface mount device is electrically connected to the PCB board; the PCB board is electrically connected to the connector; the control terminal of the light source is electrically connected to the output terminal of the PCB board; the output terminal of the fingerprint sensor is electrically connected to the input terminal of the PCB board; and the output terminal of the connector serves as the output terminal of the luminescent fingerprint module.

7. A light-emitting fingerprint module as described in claim 6, characterized in that, The surface of the patch device is coated with a paint layer.

8. A light-emitting fingerprint module as described in claim 6, characterized in that, The fingerprint sensor includes a sensing device and a signal processing circuit; the sensing device serves as the fingerprint signal input terminal of the luminescent fingerprint module; the output terminal of the sensing device is electrically connected to the input terminal of the signal processing circuit; and the output terminal of the signal processing circuit is electrically connected to the input terminal of the PCB board.

9. A light-emitting fingerprint module as described in claim 8, characterized in that, The surface of the sensing device is circular.

10. A fingerprint recognition device, characterized in that, Includes the luminescent fingerprint module, driver module, and device switch as described in any one of claims 1 to 9; The fingerprint signal input terminal of the luminescent fingerprint module serves as the fingerprint input terminal of the fingerprint recognition device. The output terminal of the luminescent fingerprint module is electrically connected to the input terminal of the driving module; The output terminal of the drive module is electrically connected to the control terminal of the device switch.

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