Fingerprint recognition device and electronic device

Abstract

The utility model discloses a kind of fingerprint identification device and electronic equipment.The fingerprint identification device, including glass plate, substrate, infrared light source, visible light source and fingerprint identification module;Glass plate is equipped with infrared light window area and visible light window area;Substrate is arranged below glass plate;Infrared light source and visible light source, interval setting are on the upper surface of substrate;Fingerprint identification module is arranged between substrate and glass plate;Fingerprint identification module includes light guide piece and light shield, light guide piece and light shield cooperate, form mutually isolated infrared light channel and visible light channel;Infrared light channel is oppositely arranged with infrared light source and infrared light window area;Visible light channel is oppositely arranged with visible light source and visible light window area.The fingerprint identification device can guarantee the security of fingerprint identification, facilitate fingerprint pressing operation, and can guarantee fingerprint identification accuracy.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a fingerprint recognition device and an electronic device. Background Technology

[0002] For security reasons, existing door locks, security systems, and automotive devices typically require fingerprint modules installed under a thick glass cover. Current capacitive fingerprint modules cannot perform fingerprint recognition under such thick glass covers. While both visible light and infrared fingerprint modules can perform fingerprint recognition under thick glass covers, visible light modules are prone to fingerprint spoofing, resulting in lower security. Infrared fingerprint modules, on the other hand, prevent fingerprint spoofing and ensure security, but they cannot clearly indicate the fingerprint recognition area on the glass cover, affecting the efficiency of fingerprint pressing.

[0003] To overcome the problem that infrared fingerprint modules cannot indicate the fingerprint recognition area, a visible light source can be set in the electronic device to use the visible light emitted by the visible light source to indicate the fingerprint recognition area. However, the visible light emitted by the visible light source can easily interfere with the accuracy of fingerprint recognition by the infrared fingerprint module. Utility Model Content

[0004] This utility model provides a fingerprint recognition device and an electronic device to solve the problem that visible light interferes with the accuracy of fingerprint recognition by the infrared light fingerprint module in electronic devices that integrate infrared light fingerprint modules and infrared light sources.

[0005] A fingerprint recognition device includes a glass plate, a substrate, an infrared light source, a visible light source, and a fingerprint recognition module;

[0006] The glass plate is provided with an infrared light viewing window area and a visible light viewing window area;

[0007] The substrate is disposed below the glass plate;

[0008] The infrared light source and the visible light source are disposed at intervals on the upper surface of the substrate;

[0009] The fingerprint recognition module is disposed between the substrate and the glass plate; the fingerprint recognition module includes a light guide and a light shield, which cooperate to form an infrared light channel and a visible light channel that are isolated from each other; the infrared light channel is disposed opposite to the infrared light source and the infrared light window area; the visible light channel is disposed opposite to the visible light source and the visible light window area.

[0010] Preferably, the light guide has an infrared light transmission area and a visible light transmission area, wherein the infrared light transmission area is disposed opposite to the infrared light source, and the visible light transmission area is disposed opposite to the visible light source;

[0011] The light-shielding component is disposed on the upper surface of the light guide component. The light-shielding component includes an infrared light hole and a visible light hole. The infrared light hole is disposed opposite to the infrared light transmission area and the infrared light viewing window area. The visible light hole is disposed opposite to the visible light transmission area and the visible light viewing window area.

[0012] Preferably, the light guide includes a light guide body, which is detachably connected to the substrate to form an accommodating space, and the infrared light source and the visible light source are disposed within the accommodating space;

[0013] The light guide body is provided with the infrared light transmission area and the visible light transmission area;

[0014] The light-shielding component is disposed on the upper surface of the light guide body.

[0015] Preferably, the light guide body includes a light guide portion and a support portion extending downward from the edge of the light guide portion, the support portion being detachably connected to the substrate to form an accommodating space;

[0016] The light guide section is provided with the infrared light transmission area and the visible light transmission area;

[0017] The light-shielding element is disposed on the upper surface of the light guide.

[0018] Preferably, the upper surface of the light guide body is provided with a conical light-emitting surface, and the diameter of the conical light-emitting surface gradually increases from bottom to top;

[0019] The conical light-emitting surface is positioned opposite to the infrared light source and the infrared light viewing window area.

[0020] Preferably, the fingerprint recognition module further includes a fingerprint sensor, which is disposed within the accommodating space;

[0021] The projection of the fingerprint sensor onto the substrate along the vertical direction does not overlap with the infrared light source and the visible light source;

[0022] The projection of the fingerprint sensor onto the glass plate in the vertical direction overlaps with the infrared light window area.

[0023] Preferably, the light guide body is provided with a first clearance hole;

[0024] The fingerprint sensor includes a sensor chip and a sensor lens;

[0025] The sensor chip is disposed on the upper surface of the substrate;

[0026] The sensor lens is positioned above the sensor chip and extends to the first clearance hole.

[0027] Preferably, the sensor lens includes a lens bracket and a lens body;

[0028] The lens holder is disposed above the sensor chip, and the lower surface of the lens holder is fixedly connected to the upper surface of the substrate.

[0029] The lens body is disposed on the upper surface of the lens bracket, and the lens body extends into the first clearance hole.

[0030] Preferably, the fingerprint sensor further includes a light filter;

[0031] The filter is disposed on or above the upper surface of the sensor chip, or on or above the upper surface of the sensor lens.

[0032] Preferably, the fingerprint recognition device further includes a touch detection module;

[0033] The touch detection module is located between the light guide body and the sensor lens;

[0034] The touch detection module is disposed opposite to the infrared light window area and is electrically connected to the substrate. It is used to output a command to the fingerprint recognition module when a finger presses the infrared light window area, so that the fingerprint recognition module can perform fingerprint recognition.

[0035] Preferably, the touch detection module includes a touch detection circuit board, the upper surface of which is bonded to the lower surface of the light guide, and the lower surface of which is provided with touch pads, which are electrically connected to the substrate via probes;

[0036] The touch detection circuit board is provided with a second clearance hole, which is disposed opposite to the first clearance hole;

[0037] The sensor lens extends through the second clearance hole to the first clearance hole.

[0038] Preferably, the touch detection circuit board includes a touch detection ring and two touch connection portions extending radially from the edge of the touch detection ring;

[0039] The touch detection ring is provided with the second clearance hole, and the upper surface of the touch detection ring is bonded to the lower surface of the light guide.

[0040] Each of the touch connection portions has a touch pad on its lower surface.

[0041] Preferably, the touch detection module further includes a sealing element;

[0042] The sealing element is sleeved on the lens body and is sealed to the upper surface of the lens bracket and the lower surface of the touch detection ring.

[0043] Preferably, the fingerprint recognition device further includes a fixing plate;

[0044] The fixing plate is fixedly connected to the light guide and the fixing plate is fixedly connected to the glass plate.

[0045] Preferably, the fixing plate includes a receiving groove, a snap-fit ​​groove extending outward from the edge of the receiving groove, and a snap-fit ​​position extending outward from the upper part of the snap-fit ​​groove;

[0046] The light guide also includes a snap-fit ​​structure extending outward from the outside of the light guide body;

[0047] The light guide body is assembled in the receiving groove, the snap-fit ​​structure is assembled in the snap-fit ​​groove, and the snap-fit ​​structure snaps into the snap-fit ​​position.

[0048] Preferably, the snap-fit ​​structure includes multiple snap-fit ​​components;

[0049] The fixing plate is provided with multiple snap-fit ​​slots, each of the snap-fit ​​slots is provided with a snap-fit ​​position, and each snap-fit ​​position is used to snap-fit ​​one or more of the snap-fit ​​components.

[0050] Preferably, each of the snap-fit ​​components includes a flexible arm extending outward from the outside of the light guide body and a first protrusion extending outward from the flexible arm, wherein the flexible arm is a U-shaped flexible arm with the opening facing upward.

[0051] When the snap-fit ​​component snaps into the snap-fit ​​position, the lower surface of the first protrusion is in contact with the upper surface of the snap-fit ​​position, and the outer side of the flexible arm is in contact with the inner side of the snap-fit ​​position.

[0052] Preferably, each of the snap-fit ​​components further includes a second protrusion extending outward from the flexible arm, the second protrusion being located below the first protrusion, the second protrusion cooperating with the first protrusion to form an anti-disengagement groove for snapping the snap-fit ​​position.

[0053] Preferably, the upper surface of the first protrusion is provided with a guide surface, and the length of the guide surface gradually increases from top to bottom along the extension direction.

[0054] Preferably, the snap-fit ​​structure includes two first snap-fit ​​members, which are disposed on both sides of the light guide body along a first direction or a second direction;

[0055] Alternatively, the snap-fit ​​structure includes four second snap-fit ​​members, wherein two of the second snap-fit ​​members are disposed on both sides of the light guide body along the first direction, and the other two second snap-fit ​​members are disposed on the other two sides of the light guide body along the second direction.

[0056] Alternatively, the snap-fit ​​structure includes two snap-fit ​​components, which are disposed on both sides of the light guide body along a first direction or a second direction. Each snap-fit ​​component includes two second snap-fit ​​pieces disposed at intervals on the same side of the light guide body.

[0057] The width of the first snap-fit ​​component is greater than the width of the second snap-fit ​​component.

[0058] Preferably, the flexible arm of the first snap-fit ​​member has a hollow hole.

[0059] Preferably, the substrate has a clearance notch at its edge, and each clearance notch is provided corresponding to a snap-fit ​​component to avoid the snap-fit ​​component.

[0060] Preferably, the infrared light source includes a plurality of infrared LEDs, which are spaced apart in the circumferential direction to form a circular area;

[0061] The visible light source includes one or more visible light LEDs, which are disposed outside the circular area.

[0062] An electronic device includes the fingerprint recognition device described above.

[0063] This utility model provides a fingerprint recognition device and an electronic device. A fingerprint recognition module is disposed between a substrate and a glass plate. The fingerprint recognition module includes a light guide and a light shield. Through the cooperation of the light guide and the light shield, an infrared light channel for transmitting infrared light is formed between the infrared light source and the infrared light window area, and a visible light channel for transmitting visible light is formed between the visible light source and the visible light window area. Fingerprint recognition is achieved through the infrared light transmitted via the infrared light channel, ensuring the security of fingerprint recognition. Through the cooperation of the light guide and the light shield, the visible light transmitted via the visible light channel also indicates the infrared light window area to determine the fingerprint recognition area, thereby improving the efficiency of fingerprint pressing operations. The infrared light channel and the visible light channel are isolated from each other, effectively blocking visible light from entering the infrared light channel and avoiding affecting the recognition accuracy of fingerprint recognition using infrared light. Attached Figure Description

[0064] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0065] Figure 1 This is an exploded view of a fingerprint recognition device according to an embodiment of the present invention;

[0066] Figure 2 yes Figure 1 Another exploded view of the fingerprint recognition device shown;

[0067] Figure 3 This is an exploded view of a fingerprint recognition device according to another embodiment of the present invention;

[0068] Figure 4 yes Figure 3 Another exploded view of the fingerprint recognition device shown;

[0069] Figure 5 This is a cross-sectional view of a fingerprint recognition device according to an embodiment of the present invention;

[0070] Figure 6 This is a perspective view of the light guide component in the first embodiment of this utility model;

[0071] Figure 7 yes Figure 6 Another perspective view of the light guide shown;

[0072] Figure 8 This is a perspective view of the light guide component in the second embodiment of this utility model;

[0073] Figure 9 This is a perspective view of the light guide component in the third embodiment of this utility model;

[0074] Figure 10 This is a perspective view of the light guide component in the fourth embodiment of this utility model;

[0075] Figure 11 This is a perspective view of a touch detection module in one embodiment of the present invention;

[0076] Figure 12 This is a cross-sectional view of a touch detection module in one embodiment of the present invention;

[0077] Figure 13 This is a perspective view of a sensor lens in one embodiment of the present invention;

[0078] Figure 14This is a top view of the substrate in one embodiment of the present invention.

[0079] Explanation of reference numerals in the attached figures:

[0080] 1. Glass plate; 11. Infrared light viewing window area; 12. Visible light viewing window area;

[0081] 2. Substrate; 21. Clearance notch;

[0082] 3. Infrared light source; 31. Infrared LED light;

[0083] 4. Visible light source; 41. Visible light LED lamp;

[0084] 5. Fingerprint recognition module; 51. Light guide; 511. Infrared light transmission area; 512. Visible light transmission area; 513. Light guide body; 5131. Light guide part; 5132. Support part; 5133. Conical light-emitting surface; 5134. First clearance hole; 514. Snap-fit ​​structure; 5141. Snap-fit ​​component; 51411. Flexible arm; 51412. First protrusion; 51413. Second protrusion; 51414. Guide surface; 51415. Hole; 5142. First snap-fit ​​component; 5143. Second snap-fit ​​component; 52. Light shield; 521. Infrared light hole; 522. Visible light hole; 53. Fingerprint sensor; 531. Sensor chip; 532. Sensor lens; 5321. Lens bracket; 5322. Lens body; 533. Filter;

[0085] 6. Touch detection module; 61. Touch detection circuit board; 611. Second clearance hole; 612. Touch pad; 613. Touch detection ring; 614. Touch connection part; 62. Seal;

[0086] 7. Fixing plate; 71. Receiving groove; 72. Snap-fit ​​groove; 73. Snap-fit ​​position.

[0087] 81. Screw; 82. Probe; 83. First double-sided adhesive; 84. Second double-sided adhesive. Detailed Implementation

[0088] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0089] This application provides a fingerprint recognition device based on under-display fingerprint technology. Under-display fingerprint technology is a fingerprint recognition technology that is set under the screen, allowing users to perform fingerprint recognition operations above the screen. Therefore, in this example, "above" refers to the side of the screen facing the user's finger, and "below" refers to the side of the screen away from the user's finger.

[0090] This application provides a fingerprint recognition device, such as... Figures 1-4 As shown, the fingerprint recognition device includes a glass plate 1, a substrate 2, an infrared light source 3, a visible light source 4, and a fingerprint recognition module 5. The glass plate 1 is provided with an infrared light viewing window area 11 and a visible light viewing window area 12. The substrate 2 is disposed below the glass plate 1. The infrared light source 3 and the visible light source are disposed at intervals on the upper surface of the substrate 2. The fingerprint recognition module 5 is disposed between the substrate 2 and the glass plate 1. The fingerprint recognition module 5 includes a light guide 51 and a light shield 52, which cooperate to form an infrared light channel and a visible light channel that are isolated from each other. The infrared light channel is disposed opposite to the infrared light source 3 and the infrared light viewing window area 11. The visible light channel is disposed opposite to the visible light source 4 and the visible light viewing window area 12.

[0091] The glass plate 1 provides a touch interface for fingerprint recognition. The glass plate 1 has an infrared light window area 11 and a visible light window area 12. The infrared light window area 11 is the fingerprint recognition area; fingerprint recognition can be performed when a user touches the infrared light window area 11. The visible light window area 12 is located near the infrared light window area 11 and is used to indicate the location of the fingerprint recognition area. The other areas of the glass plate 1 are opaque and can be coated with ink. The thickness of the glass plate 1 is 0.7mm-5mm, and it can be used as protective glass for electronic devices. The glass plate 1 can be a decorative glass panel or a glass panel for functional components on electronic devices. In this example, the thickness of the glass plate 1 is 2mm, and it has an infrared light transmittance of 60-85% in the infrared light window area 11. One or more visible light window areas 12 can be provided, and multiple visible light window areas 12 can be evenly distributed around the infrared light window area 11. The number and shape of the visible light window areas 12 can be set as needed. Figure 2 and Figure 4 As shown, there are four visible light window areas 12, which are evenly arranged around the infrared light window area 11 to clearly indicate the fingerprint recognition area.

[0092] The substrate 2 serves as a support for the fingerprint recognition device, supporting components such as the light source and chip. It also facilitates external connections, such as connecting to external devices via a connector on the lower surface of the substrate 2. As an example, the substrate 2 can be, but is not limited to, a PCBA board. The infrared light source 3 and the visible light source 4 can be mounted on the upper surface of the PCBA board using SMT (Surface Mount Technology).

[0093] The infrared light source 3 is disposed on the upper surface of the substrate 2, below the infrared light window area 11 of the glass plate 1, and is used to emit infrared light to illuminate the finger pressed on the glass plate 1 to generate reflected light. The emission wavelength of the infrared light source 3 is set as needed. In this example, the emission wavelength range of the infrared light source 3 is 760nm-1000nm, preferably 850nm. The infrared light source 3 includes one or more infrared LEDs 31, which are evenly arranged at the corresponding positions in the infrared light window area 11. The infrared light source 3 is mounted on the upper surface of the substrate 2 using an SMT process.

[0094] The visible light source 4 is disposed on the upper surface of the substrate 2, below the visible light window area 12 of the glass plate 1. The number and position of the visible light source 4 correspond one-to-one with the number and position of the visible light window areas 12 on the glass plate 1. In this example, the visible light source 4 includes one or more visible light LEDs 41, each visible light LED 41 being disposed opposite to a visible light window area 12. The visible light source 4 is mounted on the upper surface of the substrate 2 using an SMT process.

[0095] The fingerprint recognition module 5 is located below the glass plate 1 and can receive the reflected light generated by infrared light illuminating the glass plate 1, and perform fingerprint recognition based on the reflected light. Specifically, the infrared light emitted by the infrared light source 3 shines on the finger through the glass plate 1, and the ridge features of the fingerprint reflect the light to the fingerprint recognition module 5, which then performs fingerprint recognition based on the collected feature points.

[0096] As an example, the fingerprint recognition module 5 is disposed between the substrate 2 and the glass plate 1, specifically between the upper surface of the substrate 2 and the lower surface of the glass plate 1. The fingerprint recognition module 5 includes a light guide 51 and a light shield 52; the light guide 51 is used to transmit infrared light and visible light; the light shield 52 blocks part of the light, so that some infrared light and visible light can be transmitted, while the other part of infrared light and visible light cannot be transmitted. The light guide 51 and the light shield 52 cooperate to form mutually isolated infrared light channels and visible light channels; the infrared light channel is arranged opposite to the infrared light source 3 and the infrared light window area 11, and is used to transmit infrared light; the visible light channel is arranged opposite to the visible light source 4 and the visible light window area 12, and is used to transmit visible light; since the infrared light channel and the visible light channel are mutually isolated, visible light can be effectively blocked from entering the infrared light channel, avoiding affecting the recognition accuracy of fingerprint recognition using infrared light.

[0097] In this embodiment, the fingerprint recognition module 5 is disposed between the substrate 2 and the glass plate 1. The fingerprint recognition module 5 includes a light guide 51 and a light shield 52. Through the cooperation of the light guide 51 and the light shield 52, an infrared light channel for transmitting infrared light is formed between the infrared light source 3 and the infrared light window area 11. The infrared light transmitted through the infrared light channel realizes fingerprint recognition, ensuring the security of fingerprint recognition. Through the cooperation of the light guide 51 and the light shield 52, a visible light channel for transmitting visible light is also formed between the visible light source 4 and the visible light window area 12. The visible light transmitted through the visible light channel indicates the infrared light window area 11 to determine the fingerprint recognition area, thereby improving the efficiency of the user's fingerprint pressing operation. The infrared light channel and the visible light channel are isolated from each other, which can effectively block visible light from entering the infrared light channel to avoid affecting the recognition accuracy of the infrared light for fingerprint recognition.

[0098] In one embodiment, such as Figures 7-10 As shown, the light guide 51 has an infrared light transmission area 511 and a visible light transmission area 512. The infrared light transmission area 511 is positioned opposite to the infrared light source 3, and the visible light transmission area 512 is positioned opposite to the visible light source 4; Figure 1 and Figure 3 As shown, the light-shielding member 52 is disposed on the upper surface of the light guide member 51. The light-shielding member 52 includes an infrared light hole 521 and a visible light hole 522. The infrared light hole 521 is disposed opposite to the infrared light transmission area 511 and the infrared light window area 11, and the visible light hole 522 is disposed opposite to the visible light transmission area 512 and the visible light window area 12.

[0099] As an example, the light guide 51 has an infrared light transmission area 511 and a visible light transmission area 512. The infrared light transmission area 511 is positioned opposite to the infrared light source 3 and is used to transmit infrared light; the visible light transmission area 512 is positioned opposite to the visible light source 4 and is used to transmit visible light. A light-shielding element 52 is disposed on the upper surface of the light guide 51. Specifically, double-sided tape or glue can be used to adhere the lower surface of the light-shielding element 52 to the upper surface of the light guide 51, so that the upper surface of the light-shielding element 52 is positioned opposite to the lower surface of the glass plate 1. Depending on the actual situation, the upper surface of the light-shielding element 52 may or may not be adhered to the glass plate 1. The light-shielding component 52 is provided with an infrared light hole 521 and a visible light hole 522. The infrared light hole 521 is located at the center of the light-shielding component 52, opposite to the infrared light transmission area 511 of the light guide component 51 and the infrared light viewing window area 11 of the glass plate 1, for allowing infrared light to pass through. The visible light hole 522 is opposite to the visible light transmission area 512 of the light guide component 51 and the visible light viewing window area 12 of the glass plate 1, for allowing visible light to pass through. The light-shielding component 52 is used to block the light emitted by the visible light source 4 from entering the infrared light channel, avoiding interference with the transmission of infrared light and improving the accuracy of fingerprint recognition.

[0100] In one embodiment, such as Figures 7-10As shown, the light guide 51 includes a light guide body 513, which is detachably connected to the substrate 2 to form an accommodating space. The infrared light source 3 and the visible light source 4 are disposed in the accommodating space. The light guide body 513 is provided with an infrared light transmission area 511 and a visible light transmission area 512. The light shield 52 is disposed on the upper surface of the light guide body 513.

[0101] As an example, the light guide 51 includes a light guide body 513, which is detachably connected to the substrate 2. Specifically, the light guide body 513 can be screwed, snap-fitted, or connected to the substrate 2 in other ways to form an accommodating space for accommodating the infrared light source 3, the visible light source 4, and other devices. The light guide body 513 has an infrared light transmission area 511 and a visible light transmission area 512. The infrared light transmission area 511 is positioned opposite to the infrared light source 3 and is used to transmit infrared light; the visible light transmission area 512 is positioned opposite to the visible light source 4 and is used to transmit visible light. A light shield 52 is disposed on the upper surface of the light guide body 513. Specifically, the lower surface of the light shield 52 can be bonded to the upper surface of the light guide body 513 using double-sided tape or glue, so that the upper surface of the light shield 52 is positioned opposite to the lower surface of the glass plate 1. This makes the light shield 52 and the light guide 51 an integral structure, and the two work together to form mutually isolated infrared light channels and visible light channels.

[0102] In one embodiment, such as Figure 6 and Figure 7 As shown, the light guide body 513 includes a light guide portion 5131 and a support portion 5132 extending downward from the edge of the light guide portion 5131. The support portion 5132 is detachably connected to the substrate 2 to form an accommodating space. The light guide portion 5131 is provided with an infrared light transmission area 511 and a visible light transmission area 512. A light shield 52 is disposed on the upper surface of the light guide portion 5131.

[0103] As an example, the light guide 51 includes a light guide portion 5131 and a support portion 5132 extending downward from the edge of the light guide portion 5131. The light guide portion 5131 is provided with an infrared light transmission area 511 for transmitting infrared light and a visible light transmission area 512 for transmitting visible light. The support portion 5132 is used to connect other devices. For example, the support portion 5132 is detachably connected to the substrate 2 so that an accommodating space is formed between the light guide portion 5131 and the substrate 2 for accommodating a light source and other devices.

[0104] In this example, the lower surface of the support 5132 is detachably connected to the substrate 2. Specifically, a threaded hole can be provided on the lower surface of the light guide 51, and a threaded hole is also provided at the corresponding position on the substrate 2. A screw 81 is used to screw the light guide 51 through the threaded hole of the substrate 2 and the threaded hole of the light guide 51 to achieve a detachable connection between the light guide 51 and the substrate 2. Moreover, an accommodating space is formed between the light guide 51 and the substrate 2 to accommodate the device disposed between the two.

[0105] Furthermore, the substrate 2 is provided with positioning holes, and the lower surface of the light guide 51 is provided with positioning posts that match the positioning holes. Before tightening the screws 81, the positioning posts are first inserted into the corresponding positioning holes for alignment and positioning, which reduces the difficulty of assembly and improves the accuracy after assembly.

[0106] In one embodiment, such as Figure 6 As shown, the upper surface of the light guide body 513 is provided with a conical light-emitting surface 5133, the diameter of which gradually increases from bottom to top; the conical light-emitting surface 5133 is arranged opposite to the infrared light source 3 and the infrared light window area 11.

[0107] As an example, the upper surface of the light guide body 513 is provided with a conical light-emitting surface 5133, which is located at the center of the light guide body 513. The diameter of the conical light-emitting surface 5133 gradually increases from bottom to top, and is used to transmit and diffuse light. The conical light-emitting surface 5133 is arranged opposite to the infrared light source 3 and the infrared light window area 11, so that the conical light-emitting surface 5133 can effectively transmit and expand the infrared light, so that the infrared light emitted by the infrared light source 3 can be effectively transmitted to the infrared light window area 11.

[0108] In one embodiment, such as Figures 1-4 As shown, the fingerprint recognition module 5 also includes a fingerprint sensor 53, which is disposed in the accommodating space; the projection of the fingerprint sensor 53 onto the substrate 2 in the vertical direction does not overlap with the infrared light source 3 and the visible light source 4; the projection of the fingerprint sensor 53 onto the glass plate 1 in the vertical direction overlaps with the infrared light window area 11.

[0109] As an example, the fingerprint recognition module 5 also includes a fingerprint sensor 53, which is disposed within the accommodating space formed by the light guide 51 and the substrate 2. In this example, the fingerprint sensor 53 is disposed on or above the upper surface of the substrate 2, and the fingerprint sensor 53 needs to be disposed away from the infrared light source 3 and the visible light source 4 so that the projection of the fingerprint sensor 53 onto the substrate 2 in the vertical direction does not overlap with the infrared light source 3 and the visible light source 4, thereby ensuring that the upward-emitted light from the infrared light source 3 and the visible light source 4 is not blocked by the fingerprint sensor 53. Furthermore, since the fingerprint sensor 53 is disposed below the glass plate 1, the projection of the fingerprint sensor 53 onto the glass plate 1 in the vertical direction needs to overlap with the infrared light window area 11 so that the fingerprint sensor 53 can effectively receive the reflected light from the infrared light window area 11 for fingerprint recognition based on the reflected light. In this example, the fingerprint sensor 53 is disposed on or above the upper surface of the substrate 2 and below the glass plate 1. The infrared light emitted by the infrared light source 3 is transmitted through the infrared light channel to the infrared light window area 11 of the glass plate 1 to illuminate the finger. The ridge features of the fingerprint reflect the light to the fingerprint sensor 53 so that the fingerprint sensor 53 can perform fingerprint recognition based on the reflected light.

[0110] In one embodiment, such as Figure 6 and Figure 7 As shown, the light guide body 513 is provided with a first clearance hole 5134; as Figure 1 and Figure 3 As shown, the fingerprint sensor 53 includes a sensor chip 531 and a sensor lens 532; the sensor chip 531 is disposed on the upper surface of the substrate 2; the sensor lens 532 is disposed above the sensor chip 531 and extends to the first clearance hole 5134.

[0111] As an example, the light guide body 513 is provided with a first clearance hole 5134, which is located at the center of the light guide body 513, specifically at the center of the conical light-emitting surface 5133. The fingerprint sensor 53 includes a sensor chip 531 and a sensor lens 532. The sensor chip 531 is bonded to the upper surface of the substrate 2 with die-attach adhesive and gold wire bonding. The sensor chip 531 is a camera chip used for infrared light. The sensor lens 532 is located above the sensor chip 531 and extends into the first clearance hole 5134. After the center of the sensor lens 532 is aligned with the center of the sensor chip 531, it is bonded to the upper surface of the substrate 2 with adhesive. The sensor lens 532 enters the first clearance hole 5134 to transmit infrared light. In this example, the sensor lens 532 extends into the first clearance hole 5134 of the light guide body 513, making the overall structure of the sensor lens 532 and the light guide body 513 more compact.

[0112] In one embodiment, such as Figure 13 As shown, the sensor lens 532 includes a lens bracket 5321 and a lens body 5322; the lens bracket 5321 is disposed above the sensor chip 531, and the lower surface of the lens bracket 5321 is fixedly connected to the upper surface of the substrate 2; the lens body 5322 is disposed on the upper surface of the lens bracket 5321, and the lens body 5322 extends into the first clearance hole 5134.

[0113] As an example, the sensor lens 532 includes a lens bracket 5321 and a lens body 5322. The lens bracket 5321 is a structural component for mounting the lens body 5322, and the lens body 5322 is a structural component for receiving light. In this example, the lens bracket 5321 is disposed above the sensor chip 531 and is disposed opposite to the sensor chip 531. The lower surface of the lens bracket 5321 is fixedly connected to the upper surface of the substrate 2, specifically by bonding, screwing, or other methods. The lens body 5322 is disposed on the upper surface of the lens bracket 5321 and extends into the first clearance hole 5134 to achieve the cooperation between the lens body 5322 and the light guide 51 for the transmission and reception of infrared light.

[0114] In this example, the lens bracket 5321 includes a bracket body and a connecting body extending downward from the edge of the bracket body. The lower surface of the connecting body is bonded to the upper surface of the substrate 2 by double-sided adhesive or glue, specifically bonded to the peripheral area of ​​the sensor chip 531, so that the bracket body is positioned above the sensor chip 531. In this example, the sensor lens 532 is disposed on the upper surface of the bracket body, extending into the first clearance hole 5134 of the light guide 51 to receive infrared light.

[0115] In one embodiment, such as Figure 1 , Figure 3 and Figure 14 As shown, the fingerprint sensor 53 also includes a filter 533; the filter 533 is disposed on or above the upper surface of the sensor chip 531, or on or above the upper surface of the sensor lens 532.

[0116] The fingerprint sensor 53 also includes a filter 533 for filtering out light other than infrared light. The filter 533 can be glued to the upper surface or above the sensor lens 532, or it can be glued to the upper surface or above the sensor chip 531 to eliminate interference from light other than infrared light and improve the accuracy of fingerprint recognition. In this embodiment, the filter 533 is an 850nm narrowband filter 533.

[0117] In one embodiment, such as Figures 1-4 As shown, the fingerprint recognition device also includes a touch detection module 6; the touch detection module 6 is located between the light guide body 513 and the sensor lens 532; the touch detection module 6 is disposed opposite to the infrared light window area 11, and the touch detection module 6 is electrically connected to the substrate 2, and is used to output a command to the fingerprint recognition module 5 when the finger presses the infrared light window area 11, so that the fingerprint recognition module 5 can perform fingerprint recognition.

[0118] The touch detection module 6 is used to perform touch detection. It is disposed within the accommodating space, between the light guide body 513 and the sensor lens 532. Specifically, the upper surface of the touch detection module 6 is bonded to the lower surface of the light guide body 513 using a first double-sided adhesive 83, specifically to the lower surface of the light guide portion 5131. The lower surface of the touch detection module 6 is in contact with the sensor lens 532, making the entire fingerprint recognition device structure more compact. The touch detection module 6 is electrically connected to the substrate 2. When the touch detection module 6 detects a finger pressing the infrared light window area 11, it outputs a command to the fingerprint recognition module 5 to enable fingerprint recognition.

[0119] In one embodiment, such as Figure 11 and Figure 12As shown, the touch detection module 6 includes a touch detection circuit board 61. The upper surface of the touch detection circuit board 61 is bonded to the lower surface of the light guide 51. The lower surface of the touch detection circuit board 61 is provided with touch pads 612. The touch pads 612 are electrically connected to the substrate 2 through probes 82. The touch detection circuit board 61 is provided with a second clearance hole 611, which is opposite to the first clearance hole 5134. The sensor lens 532 extends through the second clearance hole 611 to the first clearance hole 5134.

[0120] As an example, the touch detection circuit board 61 is bonded to the lower surface of the light guide 51 using a first double-sided adhesive 83, specifically to the lower surface of the light guide body 513. The lower surface of the touch detection circuit board 61 has touch pads 612, which are electrically connected to the substrate 2 via POGO probes 82, thereby achieving touch detection. The touch detection circuit board 61 can be an ITO thin film (indium tin oxide semiconductor transparent conductive film) or an FPC (flexible printed circuit board) for capacitive touch detection. The touch detection circuit board 61 is provided with a second clearance hole 611. Specifically, the second clearance hole 611 is located at the center of the touch detection circuit board 61. The second clearance hole 611 is arranged opposite to the first clearance hole 5134 to provide a channel for accommodating the sensor lens 532. The sensor lens 532 (specifically the lens body 5322) passes through the second clearance hole 611 of the touch detection circuit board 61 and extends into the first clearance hole 5134 of the light guide 51, so as to ensure the tight connection between the sensor lens 532, the touch detection circuit board 61 and the light guide 51.

[0121] In one embodiment, such as Figure 11 and Figure 12 As shown, the touch detection circuit board 61 includes a touch detection ring 613 and two touch connection portions 614 extending radially from the edge of the touch detection ring 613; the touch detection ring 613 is provided with a second clearance hole 611, and the upper surface of the touch detection ring 613 is bonded to the lower surface of the light guide 51; each touch connection portion 614 has a touch pad 612 on its lower surface.

[0122] As an example, the touch detection circuit board 61 includes a touch detection ring 613 and two touch connection portions 614 extending radially from the touch detection ring 613; the two touch connection portions 614 are arranged opposite to each other, specifically symmetrically based on the center of the touch detection ring 613, and the touch detection ring 613 integrates circuitry for touch detection. A second clearance hole 611 is provided at the center of the touch detection ring 613 to allow clearance from the sensor lens 532. The upper surface of the touch detection ring 613 is bonded to the lower surface of the light guide 51 using a first double-sided adhesive 83, and the touch detection ring 613 is in contact with the upper surface of the sensor lens 532 to ensure a tight connection between the two. Two touch connection portions 614 extend radially from the edge of the touch detection ring 613. Each touch connection portion 614 has a touch pad 612 on its lower surface. The touch pad 612 is electrically connected to the substrate 2 through a probe 82. Since the two touch pads 612 are respectively set on the two touch connection portions 614, the two probes 82 can avoid the installation of the sensor lens 532 to ensure the feasibility of assembly.

[0123] In one embodiment, such as Figure 11 and Figure 12 As shown, the touch detection module 6 also includes a sealing element 62; the sealing element 62 is sleeved on the outside of the lens body 5322, and the sealing element 62 is sealed to the upper surface of the lens bracket 5321 and the lower surface of the touch detection ring 613.

[0124] As an example, the touch detection module 6 also includes a seal 62, which is fitted over the lens body 5322. The seal 62 may or may not contact the outer wall of the lens body 5322. The seal 62 is sealed to the upper surface of the lens bracket 5321 and the lower surface of the touch detection ring 613, forming a sealed space between the lens bracket 5321 and the touch detection ring 613, thus protecting the lens body 5322 within the sealed space. In this example, the seal 62 can be a sealing foam with through holes for the lens body 5322 to pass through. The upper and lower sides of the sealing foam are sealed to the touch detection ring 613 and the lens bracket 5321 respectively, ensuring a tight seal between the touch detection ring 613 and the lens bracket 5321.

[0125] In one embodiment, such as Figures 1-5 As shown, the fingerprint recognition device also includes a fixing plate 7; the fixing plate 7 is fixedly connected to the light guide 51 and the glass plate 1.

[0126] As an example, the fingerprint recognition module 5 also includes a fixing plate 7 for connecting the light guide 51 and the glass plate 1. The light guide 51 is detachably connected to the fixing plate 7. The fixing plate 7 is bonded to the lower surface of the glass plate 1 by a second double-sided adhesive 84, thereby achieving a fixed connection between the fingerprint recognition module 5 and the glass plate 1.

[0127] In one embodiment, such as Figures 1-4 As shown, the fixing plate 7 includes a receiving groove 71, a snap-fit ​​groove 72 extending outward from the edge of the receiving groove 71, and a snap-fit ​​position 73 extending outward from the upper part of the snap-fit ​​groove 72; the light guide 51 also includes a snap-fit ​​structure 514 extending outward from the outside of the light guide body 513; the light guide body 513 is assembled in the receiving groove 71, the snap-fit ​​structure 514 is assembled in the snap-fit ​​groove 72, and the snap-fit ​​structure 514 snaps into the snap-fit ​​position 73.

[0128] As an example, the light guide 51 also includes a snap-fit ​​structure 514 extending radially outward from the outer side of the light guide body 513. Correspondingly, the fixing plate 7 includes a receiving groove 71, a snap-fit ​​groove 72 extending radially outward from the edge of the receiving groove 71, and a snap-fit ​​position 73 extending radially outward from the upper part of the snap-fit ​​groove 72, such that the lower surface of the snap-fit ​​position 73 is flush with the lower surface of the fixing plate 7, and the upper surface of the snap-fit ​​position 73 is lower than the lower surface of the fixing plate 7. In this example, the shape of the receiving groove 71 matches the shape of the light guide body 513, and the shape of the snap-fit ​​groove 72 matches the shape of the snap-fit ​​structure 514. The snap-fit ​​groove 72 has a snap-fit ​​position 73. During assembly, the light guide body 513 can be assembled into the receiving groove 71 of the fixing plate 7, so that the snap-fit ​​structure 514 is assembled into the snap-fit ​​groove 72, allowing the snap-fit ​​structure 514 to engage with the snap-fit ​​position 73 in the snap-fit ​​groove 72, thereby achieving a fixed connection between the fixing plate 7 and the light guide 51. In this example, the snap-fit ​​structure 514 is located on the outside of the light guide body 513 to avoid a detachable connection between the light guide body 513 and the substrate 2.

[0129] In one embodiment, such as Figures 1-4 , Figure 6 and Figure 7 As shown, the snap-fit ​​structure 514 includes multiple snap-fit ​​pieces 5141; the fixing plate 7 is provided with multiple snap-fit ​​slots 72, each snap-fit ​​slot 72 is provided with a snap-fit ​​position 73, and each snap-fit ​​position 73 is used to snap-fit ​​one or more snap-fit ​​pieces 5141.

[0130] As an example, the light guide 51 includes a plurality of snap-fit ​​pieces 5141 extending from the outer side of the light guide body 513, where there can be two or more snap-fit ​​pieces. Correspondingly, the fixing plate 7 is provided with a plurality of snap-fit ​​slots 72, each snap-fit ​​slot 72 having a snap-fit ​​position 73, and each snap-fit ​​position 73 can snap onto one or more snap-fit ​​pieces 5141. Since the light guide 51 is provided with a plurality of snap-fit ​​pieces 5141, and the plurality of snap-fit ​​pieces 5141 respectively snap onto the plurality of snap-fit ​​positions 73 of the fixing plate 7, the light guide 51 and the fixing plate 7 achieve multi-point snap-fit, which helps to ensure the firmness of the connection between the two.

[0131] In one embodiment, such as Figure 6 and Figure 7As shown, each snap-fit ​​component 5141 includes a flexible arm 51411 extending outward from the outer side of the light guide body 513 and a first protrusion 51412 extending outward from the flexible arm 51411. The flexible arm 51411 is a U-shaped flexible arm with its opening facing upward. When the snap-fit ​​component 5141 is snapped into the snap-fit ​​position 73, the lower surface of the first protrusion 51412 is in contact with the upper surface of the snap-fit ​​position 73, and the outer side of the flexible arm 51411 is in contact with the inner side of the snap-fit ​​position 73.

[0132] As an example, each snap-fit ​​element 5141 includes a flexible arm 51411 extending from the outside of the light guide body 513. The flexible arm 51411 is a U-shaped flexible arm with an upward opening. The flexible arm 51411 can deform under external force so that the snap-fit ​​element 5141 can be assembled in the snap-fit ​​groove 72 and snap-fit ​​with the snap-fit ​​position 73. The snap-fit ​​element 5141 also includes a first protrusion 51412 extending outward from the flexible arm 51411, specifically, the first protrusion 51412 extends outward in a radial direction from the upper end of the flexible arm 51411. In this example, an outward-to-inward force can be applied to the upper end of the flexible arm 51411, causing the flexible arm 51411 to deform and engage the snap-fit ​​member 5141 with the snap-fit ​​position 73. This causes the lower surface of the first protrusion 51412 to contact the upper surface of the snap-fit ​​position 73, and the outer side of the flexible arm 51411 to contact the inner side of the snap-fit ​​position 73, thus achieving a snap-fit ​​fixation. In this example, when the flexible arm 51411 only has the first protrusion 51412, applying external force to the flexible arm 51411 can achieve either a snap-fit ​​fixation or a release between the two.

[0133] In one embodiment, such as Figures 5-7 As shown, each snap-fit ​​component 5141 also includes a second protrusion 51413 extending outward from the flexible arm 51411. The second protrusion 51413 is located below the first protrusion 51412. The second protrusion 51413 cooperates with the first protrusion 51412 to form an anti-detachment groove for the snap-fit ​​position 73.

[0134] As an example, each snap-fit ​​element 5141 also includes a second protrusion 51413 extending radially outward from the flexible arm 51411. The second protrusion 51413 is located below the first protrusion 51412, and the length of the second protrusion 51413 may be greater than or equal to the length of the first protrusion 51412. The second protrusion 51413 cooperates with the first protrusion 51412 to form an anti-detachment groove for the snap-fit ​​position 73. In this example, when the flexible arm 51411 is provided with both the first protrusion 51412 and the second protrusion 51413, the snap-fit ​​position 73 corresponding to the fixing plate 7 can be snapped into the anti-detachment groove formed by the snap-fit ​​element 5141 to ensure the firmness of the connection between the fixing plate 7 and the light guide 51, effectively preventing loosening and detachment.

[0135] In one embodiment, such as Figures 5-7As shown, the upper surface of the first protrusion 51412 is provided with a guide surface 51414, and the length of the guide surface 51414 gradually increases from top to bottom along the extension direction.

[0136] As an example, the upper surface of the first protrusion 51412 is provided with a guide surface 51414. The length of the guide surface 51414 gradually increases from top to bottom along the extension direction to facilitate the snap-fit ​​into the snap-fit ​​position 73 of the fixing plate 7, which helps to improve the operating efficiency.

[0137] In one embodiment, such as Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 9 As shown, the snap-fit ​​structure 514 includes two first snap-fit ​​members 5142, which are disposed on both sides of the light guide body 513 along a first direction or a second direction; or, as shown... Figure 3 and Figure 4 As shown, the snap-fit ​​structure 514 includes four second snap-fit ​​members 5143, wherein two second snap-fit ​​members 5143 are disposed on both sides of the light guide body 513 along a first direction, and the other two second snap-fit ​​members 5143 are disposed on the other two sides of the light guide body 513 along a second direction; or, as shown Figure 8 and Figure 10 As shown, the snap-fit ​​structure 514 includes two snap-fit ​​components, which are disposed on both sides of the light guide body 513 along a first direction or a second direction. Each snap-fit ​​component includes two second snap-fit ​​pieces 5143 that are spaced apart on the same side of the light guide body 513. The width of the first snap-fit ​​piece 5142 is greater than the width of the second snap-fit ​​piece 5143.

[0138] In this example, the snap-fit ​​component 5141 includes two types of snap-fit ​​components 5141 with different widths: a first snap-fit ​​component 5142 and a second snap-fit ​​component 5143. The first snap-fit ​​component 5142 has a larger width, resulting in a larger contact area with the fixing plate 7; the second snap-fit ​​component 5143 has a smaller width, resulting in a smaller contact area with the fixing plate 7. Here, the first direction and the second direction are two mutually perpendicular directions; for example, the first direction is the X-axis direction, and the second direction is the Y-axis direction.

[0139] As an example, the snap-fit ​​structure 514 may include two first snap-fit ​​members 5142. These two first snap-fit ​​members 5142 can be disposed on both sides of the light guide body 513 along a first direction, or on the other two sides of the light guide body 513 along a second direction. Because the first snap-fit ​​members 5142 have a larger width, the contact area between them and the snap-fit ​​positions 73 of the fixing plate 7 is larger, thus ensuring a secure snap-fit ​​with the fixing plate 7. In this example, the fixing plate 7 is provided with two snap-fit ​​slots 72, and the snap-fit ​​position 73 in each snap-fit ​​slot 72 snaps into one first snap-fit ​​member 5142.

[0140] As another example, the snap-fit ​​structure 514 may include four second snap-fit ​​pieces 5143, wherein two first snap-fit ​​pieces 5142 are disposed on both sides of the light guide body 513 along a first direction, and the other two second snap-fit ​​pieces 5143 are disposed on the other two sides of the light guide body 513 along a second direction, so that each of the four sides of the light guide body 513 is snapped into the fixing plate 7 by a second snap-fit ​​piece 5143. Since the width of the second snap-fit ​​piece 5143 is small, the contact area between it and the snap-fit ​​position 73 of the fixing plate 7 is small, so four second snap-fit ​​pieces 5143 are needed to increase its contact area to ensure the firmness of the snap-fit ​​between the light guide 51 and the fixing plate 7. In this example, the fixing plate 7 is provided with four snap-fit ​​slots 72, and the snap-fit ​​position 73 in each snap-fit ​​slot 72 is snapped into one second snap-fit ​​piece 5143.

[0141] As an example, the snap-fit ​​structure 514 includes two snap-fit ​​components, each of which includes two second snap-fit ​​pieces 5143. The two snap-fit ​​components can be arranged on both sides of the light guide body 513 along a first direction, or on two other sides of the light guide body 513 along a second direction. Since the width of the second snap-fit ​​pieces 5143 is relatively small, the contact area between the same side of the light guide body 513 and the fixing plate 7 can be increased by increasing the number of second snap-fit ​​pieces 5143 arranged on the same side of the light guide body 513, thereby ensuring the firmness of the snap-fit ​​between the light guide 51 and the fixing plate 7. In this example, the fixing plate 7 is provided with two snap-fit ​​slots 72, and the snap-fit ​​positions 73 in each snap-fit ​​slot 72 snap-fit ​​with the two second snap-fit ​​pieces 5143.

[0142] In one embodiment, such as Figure 7 As shown, the flexible arm 51411 of the first snap-fit ​​member 5142 is provided with a hollow hole 51415.

[0143] As an example, the first snap-fit ​​member 5142 with a larger width may be provided with a hollow hole 51415. The hollow hole 51415 is provided on the flexible arm 51411 of the first snap-fit ​​member 5142, which can achieve the effect of reducing cost and weight.

[0144] In one embodiment, such as Figures 1-4 , Figure 14As shown, the edge of the substrate 2 is provided with a clearance notch 21, and each clearance notch 21 is correspondingly provided with a snap-fit ​​member 5141 to avoid the snap-fit ​​member 5141.

[0145] As an example, the edge of the substrate 2 is provided with a clearance notch 21, specifically a clearance notch 21 formed by recessing inward from the edge of the substrate 2. The position of each clearance notch 21 matches the position of a snap-fit ​​member 5141 of the light guide member 51, so that when the substrate 2 and the light guide member 51 are detachably connected, the snap-fit ​​member 5141 can be effectively avoided, so as to facilitate assembly.

[0146] In one embodiment, as shown in the figure Figure 14 As shown, the infrared light source 3 includes multiple infrared LEDs 31, which are spaced apart in the circumferential direction to form a circular area; the visible light source 4 includes one or more visible LEDs 41, which are disposed on the outside of the circular area.

[0147] As an example, the infrared light source 3 includes one or more infrared LEDs 31, which are evenly arranged at positions corresponding to the infrared viewing window area 11, specifically spaced apart along the circumferential direction on the substrate 2. The visible light source 4 includes one or more visible light LEDs 41, which are disposed outside the circular area formed by the multiple infrared LEDs 31. Figure 14 As shown, the infrared light source 3 includes eight red LEDs 31, which are disposed on the substrate 2. These eight red LEDs are evenly spaced along the circumferential direction around the fingerprint recognition module 5, forming a circular area. This circular area is positioned opposite the infrared light viewing window area 11. The visible light source includes four visible light LEDs 41, which are located outside the circular area formed by the eight red LEDs. In this example, the fingerprint sensor 53 and the probe 82 are disposed within the circular area.

[0148] This application also discloses an electronic device including the fingerprint recognition device described in the above embodiments, enabling the electronic device to have fingerprint recognition functionality. The electronic device is a device that requires protective glass and fingerprint recognition, such as a car, door lock, or security equipment. The thickness of the glass plate 1 is preferably 0.7–5 mm. The fingerprint recognition device of this application can effectively achieve fingerprint recognition under the protective glass, improving the security of the security equipment.

[0149] In this embodiment, the fingerprint recognition module 5 of the fingerprint recognition device includes a light guide 51 and a light shield 52. Through the cooperation of the light guide 51 and the light shield 52, an infrared light channel for transmitting infrared light is formed between the infrared light source 3 and the infrared light window area 11. The infrared light transmitted through the infrared light channel realizes fingerprint recognition, ensuring the security of fingerprint recognition. A visible light channel for transmitting visible light is also formed between the visible light source 4 and the visible light window area 12. The visible light transmitted through the visible light channel indicates the infrared light window area 11 to determine the fingerprint recognition area, thereby improving the efficiency of the user's fingerprint pressing operation. The infrared light channel and the visible light channel are isolated from each other, which can effectively block visible light from entering the infrared light channel to avoid affecting the recognition accuracy of the infrared light for fingerprint recognition.

[0150] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A fingerprint recognition device, characterized in that, It includes a glass plate, a substrate, an infrared light source, a visible light source, and a fingerprint recognition module; The glass plate is provided with an infrared light viewing window area and a visible light viewing window area; The substrate is disposed below the glass plate; The infrared light source and the visible light source are disposed at intervals on the upper surface of the substrate; The fingerprint recognition module is disposed between the substrate and the glass plate; the fingerprint recognition module includes a light guide and a light shield, which cooperate to form an infrared light channel and a visible light channel that are isolated from each other; the infrared light channel is disposed opposite to the infrared light source and the infrared light window area; the visible light channel is disposed opposite to the visible light source and the visible light window area.

2. The fingerprint recognition device according to claim 1, characterized in that, The light guide has an infrared light transmission area and a visible light transmission area. The infrared light transmission area is arranged opposite to the infrared light source, and the visible light transmission area is arranged opposite to the visible light source. The light-shielding component is disposed on the upper surface of the light guide component. The light-shielding component includes an infrared light hole and a visible light hole. The infrared light hole is disposed opposite to the infrared light transmission area and the infrared light viewing window area. The visible light hole is disposed opposite to the visible light transmission area and the visible light viewing window area.

3. The fingerprint recognition device according to claim 2, characterized in that, The light guide includes a light guide body, which is detachably connected to the substrate to form an accommodating space, and the infrared light source and the visible light source are disposed within the accommodating space; The light guide body is provided with the infrared light transmission area and the visible light transmission area; The light-shielding element is disposed on the upper surface of the light guide body.

4. The fingerprint recognition device according to claim 3, characterized in that, The light guide body includes a light guide portion and a support portion extending downward from the edge of the light guide portion. The support portion is detachably connected to the substrate to form an accommodating space. The light guide section is provided with the infrared light transmission area and the visible light transmission area; The light-shielding element is disposed on the upper surface of the light guide.

5. The fingerprint recognition device according to claim 3, characterized in that, The upper surface of the light guide body is provided with a conical light-emitting surface, and the diameter of the conical light-emitting surface gradually increases from bottom to top; The conical light-emitting surface is positioned opposite to the infrared light source and the infrared light viewing window area.

6. The fingerprint recognition device according to claim 3, characterized in that, The fingerprint recognition module also includes a fingerprint sensor, which is disposed within the accommodating space; The projection of the fingerprint sensor onto the substrate along the vertical direction does not overlap with the infrared light source and the visible light source; The projection of the fingerprint sensor onto the glass plate in the vertical direction overlaps with the infrared light window area.

7. The fingerprint recognition device according to claim 6, characterized in that, The light guide body is provided with a first clearance hole; The fingerprint sensor includes a sensor chip and a sensor lens; The sensor chip is disposed on the upper surface of the substrate; The sensor lens is positioned above the sensor chip and extends to the first clearance hole.

8. The fingerprint recognition device according to claim 7, characterized in that, The sensor lens includes a lens bracket and a lens body; The lens holder is disposed above the sensor chip, and the lower surface of the lens holder is fixedly connected to the upper surface of the substrate. The lens body is disposed on the upper surface of the lens bracket, and the lens body extends into the first clearance hole.

9. The fingerprint recognition device according to claim 7, characterized in that, The fingerprint sensor also includes a filter; The filter is disposed on or above the upper surface of the sensor chip, or on or above the upper surface of the sensor lens.

10. The fingerprint recognition device according to claim 8, characterized in that, The fingerprint recognition device also includes a touch detection module; The touch detection module is located between the light guide body and the sensor lens; The touch detection module is disposed opposite to the infrared light window area and is electrically connected to the substrate. It is used to output a command to the fingerprint recognition module when a finger presses the infrared light window area, so that the fingerprint recognition module can perform fingerprint recognition.

11. The fingerprint recognition device according to claim 10, characterized in that, The touch detection module includes a touch detection circuit board, the upper surface of which is bonded to the lower surface of the light guide, and the lower surface of which is provided with touch pads. The touch pads are electrically connected to the substrate through probes. The touch detection circuit board is provided with a second clearance hole, which is disposed opposite to the first clearance hole; The sensor lens extends through the second clearance hole to the first clearance hole.

12. The fingerprint recognition device according to claim 11, characterized in that, The touch detection circuit board includes a touch detection ring and two touch connection portions extending radially from the edge of the touch detection ring; The touch detection ring is provided with the second clearance hole, and the upper surface of the touch detection ring is bonded to the lower surface of the light guide. Each of the touch connection portions has a touch pad on its lower surface.

13. The fingerprint recognition device according to claim 12, characterized in that, The touch detection module also includes a sealing element; The sealing element is sleeved on the lens body and is sealed to the upper surface of the lens bracket and the lower surface of the touch detection ring.

14. The fingerprint recognition device according to claim 3, characterized in that, The fingerprint recognition device also includes a fixing plate; The fixing plate is fixedly connected to the light guide and the fixing plate is fixedly connected to the glass plate.

15. The fingerprint recognition device according to claim 14, characterized in that, The fixing plate includes a receiving groove, a snap-fit ​​groove extending outward from the edge of the receiving groove, and a snap-fit ​​position extending outward from the upper part of the snap-fit ​​groove. The light guide also includes a snap-fit ​​structure extending outward from the outside of the light guide body; The light guide body is assembled in the receiving groove, the snap-fit ​​structure is assembled in the snap-fit ​​groove, and the snap-fit ​​structure snaps into the snap-fit ​​position.

16. The fingerprint recognition device according to claim 15, characterized in that, The snap-fit ​​structure includes multiple snap-fit ​​components; The fixing plate is provided with multiple snap-fit ​​slots, each of the snap-fit ​​slots is provided with a snap-fit ​​position, and each snap-fit ​​position is used to snap-fit ​​one or more of the snap-fit ​​components.

17. The fingerprint recognition device according to claim 16, characterized in that, Each of the aforementioned snap-fit ​​components includes a flexible arm extending outward from the outside of the light guide body and a first protrusion extending outward from the flexible arm, wherein the flexible arm is a U-shaped flexible arm with its opening facing upward. When the snap-fit ​​component snaps into the snap-fit ​​position, the lower surface of the first protrusion is in contact with the upper surface of the snap-fit ​​position, and the outer side of the flexible arm is in contact with the inner side of the snap-fit ​​position.

18. The fingerprint recognition device according to claim 17, characterized in that, Each of the snap-fit ​​components further includes a second protrusion extending outward from the flexible arm, the second protrusion being located below the first protrusion, the second protrusion cooperating with the first protrusion to form an anti-disengagement groove for snapping the snap-fit ​​position.

19. The fingerprint recognition device according to claim 17, characterized in that, The upper surface of the first protrusion is provided with a guide surface, and the length of the guide surface gradually increases from top to bottom along the extension direction.

20. The fingerprint recognition device according to claim 16, characterized in that, The snap-fit ​​structure includes two first snap-fit ​​components, which are disposed on both sides of the light guide body along a first direction or a second direction. Alternatively, the snap-fit ​​structure includes four second snap-fit ​​members, wherein two of the second snap-fit ​​members are disposed on both sides of the light guide body along the first direction, and the other two second snap-fit ​​members are disposed on the other two sides of the light guide body along the second direction. Alternatively, the snap-fit ​​structure includes two snap-fit ​​components, which are disposed on both sides of the light guide body along a first direction or a second direction. Each snap-fit ​​component includes two second snap-fit ​​pieces disposed at intervals on the same side of the light guide body. The width of the first snap-fit ​​component is greater than the width of the second snap-fit ​​component.

21. The fingerprint recognition device according to claim 20, characterized in that, The flexible arm of the first snap-fit ​​component has a hollow hole.

22. The fingerprint recognition device according to claim 16, characterized in that, The substrate has a clearance notch at its edge, and each clearance notch is provided with a corresponding snap-fit ​​component to avoid the snap-fit ​​component.

23. The fingerprint recognition device according to claim 1, characterized in that, The infrared light source includes multiple infrared LEDs, which are spaced apart in a circumferential direction to form a circular area. The visible light source includes one or more visible light LEDs, which are disposed outside the circular area.

24. An electronic device, characterized in that, Includes the fingerprint recognition device according to any one of claims 1-23.

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