Fingerprint identification device and terminal equipment with fingerprint identification function

Abstract

The utility model discloses a fingerprint identification device and a terminal device with a fingerprint identification function, and the device comprises a glass plate which is provided with an infrared light-transmitting area and is used for providing a touch interface for the fingerprint identification of a finger; the infrared light source is positioned below the infrared light-transmitting area of the glass plate and is used for emitting infrared light and irradiating fingers to generate return light; and the fingerprint identification module is arranged below the glass plate to receive the return light and perform fingerprint identification on the finger according to the return light. The terminal equipment with the fingerprint identification function comprises the fingerprint identification device. According to the utility model, infrared light penetrates through the glass plate to irradiate and identify fingers, so that the fingerprint identification device is suitable for terminal equipment needing to be provided with protective glass, and can identify living fingerprints and improve safety.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, and more specifically, to a fingerprint recognition device and a terminal device with a fingerprint recognition function. Background Art

[0002] For safety reasons, existing door locks, security, automobile and other equipment hope to be able to install fingerprint modules under the protective glass on the equipment. However, the protective glass of these devices is generally thick, with a thin glass of 0.7 mm and a thick glass of 5 mm. At this thickness, the existing capacitive fingerprint module cannot realize the fingerprint recognition function. Although the visible light fingerprint module can realize fingerprint recognition at this glass thickness, there is a phenomenon of using materials such as rubber or silicone to make fake fingerprints for recognition, which has low security. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model innovatively provides a fingerprint recognition device and a terminal device with fingerprint recognition function, which uses infrared light to illuminate through a glass plate to identify fingers. It can be applied to terminal devices that require protective glass, and can recognize live fingerprints to improve security.

[0004] In order to achieve the above technical objectives, the first aspect of the present invention discloses a fingerprint recognition device, comprising:

[0005] A glass plate having an infrared light-transmitting area for providing a touch interface for fingerprint recognition;

[0006] an infrared light source, located below the infrared light-transmitting area of ​​the glass plate, for emitting infrared light and irradiating the finger to generate return light;

[0007] The fingerprint recognition module is arranged under the glass plate to receive the returned light and perform fingerprint recognition on the finger according to the returned light.

[0008] Furthermore, it also includes a touch detection ring, which is fixed on the upper surface or inside of the fingerprint recognition module. The fingerprint recognition module is provided with a touch detection contact point, and the touch detection ring is electrically connected to the touch detection contact point.

[0009] Further, the touch detection ring is electrically connected to the touch detection contact point through an elastic conductive member, the bottom of the elastic conductive member is in contact with the touch detection contact point, and the top of the elastic conductive member is in contact with the touch detection ring.

[0010] Furthermore, it also includes a breathing lamp assembly and a shading member, wherein the shading member is used to block the light emitted by the breathing lamp assembly from entering the infrared light transmission area.

[0011] Further, the shading member is a conductive shading member, an upper surface of the shading member contacts the touch detection ring, and a lower surface of the shading member contacts the touch detection contact point.

[0012] Furthermore, the fingerprint recognition module includes an infrared light guide, a fingerprint sensor and a substrate, the infrared light source and the fingerprint sensor are arranged on the substrate, the lower surface of the infrared light guide is provided with a accommodating cavity, the infrared light guide covers the infrared light source in the accommodating cavity and is fixedly connected to the substrate, the touch detection ring is fixed on the upper surface of the infrared light guide, and the touch detection contact point is provided on the substrate.

[0013] Furthermore, the upper surface of the shading member is provided with a touch detection boss, and the lower surface of the shading member is provided with touch detection contact convex points corresponding to the number and positions of the touch detection contact points.

[0014] Furthermore, the breathing lamp assembly includes a visible light source and a visible light guide, a visible light transmissive area is provided on the glass plate, the visible light light source is arranged below the visible light transmissive area, the visible light guide is arranged between the visible light source and the visible light transmissive area of ​​the glass plate, and the shading element is used to block visible light from entering the infrared light transmission area.

[0015] Furthermore, the light shading member is provided with a visible light guide member embedding cavity and a visible light source avoidance hole, the visible light guide member embedding cavity is arranged on the upper surface of the light shading member, and the visible light source avoidance hole is arranged on the lower surface of the light shading member; the visible light guide member embedding cavity and the visible light source avoidance hole are connected, the visible light guide member is embedded in the visible light guide member embedding cavity, and the visible light emitted by the visible light source enters the visible light guide member embedding cavity through the visible light source avoidance hole.

[0016] Furthermore, the visible light source is located in the visible light source avoidance hole.

[0017] Furthermore, the fingerprint recognition module includes an infrared light guide, a fingerprint sensor and a substrate, the infrared light source and the fingerprint sensor are arranged on the substrate, the lower surface of the infrared light guide is provided with a accommodating cavity, the infrared light guide covers the infrared light source in the accommodating cavity and is fixedly connected to the substrate, the touch detection ring is fixed on the upper surface of the infrared light guide or embedded in the accommodating cavity of the infrared light guide, and the touch detection contact point is provided on the substrate.

[0018] Furthermore, the upper surface of the infrared light guide is provided with a conical light-emitting surface whose diameter gradually increases from bottom to top.

[0019] Furthermore, it also includes a fixing plate, and the fingerprint recognition module is fixedly connected to the glass plate via the fixing plate.

[0020] Furthermore, the infrared light guide is fixedly connected to the fixing plate.

[0021] Furthermore, the infrared light guide comprises a light guide body and a flexible arm on the side of the light guide body, the accommodating cavity is arranged on the lower surface of the light guide body, the light guide body is fixedly connected to the substrate, and the flexible arm is fixedly connected to the fixing plate.

[0022] Furthermore, the fixing plate is bonded to the lower surface of the glass plate.

[0023] Furthermore, the fingerprint sensor includes a sensor chip and a sensor lens, the sensor chip is located in the accommodating cavity of the infrared light guide, the infrared light guide is provided with a lens avoidance hole connected to the accommodating cavity, and the sensor lens is arranged above the sensor chip and extends into the lens avoidance hole.

[0024] Furthermore, the fingerprint sensor also includes a filter for filtering out light other than infrared light, and the filter is fixed above the sensor lens or above the photosensitive area of ​​the sensor chip.

[0025] Furthermore, when the touch detection ring is embedded in the accommodating cavity of the infrared light guide, the touch detection ring is located above the infrared light source, and an infrared light transmission hole is provided on the touch detection ring.

[0026] Furthermore, the fingerprint recognition module includes an infrared light guide, a fingerprint sensor and a substrate, the infrared light source and the fingerprint sensor are arranged on the substrate, the lower surface of the infrared light guide is provided with a accommodating cavity, the infrared light guide covers the infrared light source in the accommodating cavity and is fixedly connected to the substrate, the touch detection ring is fixed on the upper surface of the infrared light guide or embedded in the accommodating cavity of the infrared light guide, and the touch detection contact point is provided on the substrate; the light source of the breathing lamp assembly is arranged on the substrate, and the light shielding member is sleeved on the infrared light guide or pressed on the substrate through the infrared light guide.

[0027] Furthermore, the infrared light guide component includes a light guide component body and a flexible arm on the side of the light guide component body, the accommodating cavity is arranged on the lower surface of the light guide component body, the light guide component body is fixedly connected to the substrate, a light guide component body avoidance hole is opened in the center of the light shading component, a flexible arm avoidance notch is arranged on the lower surface of the light shading component, the light shading component is mounted on the light guide component body through the light guide component body avoidance hole, and a part of the flexible arm is embedded in the flexible arm avoidance notch.

[0028] Furthermore, the infrared light guide element includes a light guide element main body and a flexible arm on the side of the light guide element main body, the accommodating cavity is arranged on the lower surface of the light guide element main body, the light guide element main body is fixedly connected to the substrate, the upper surface of the light shading element is provided with a clamping step or a clamping surface, and the edge of the lower surface of the light guide element main body is pressed on the clamping step or the clamping surface to press the light shading element onto the substrate.

[0029] Furthermore, the infrared light source includes one or more infrared LED lamps.

[0030] To achieve the above technical purpose, the second aspect of the utility model discloses a terminal device with a fingerprint recognition function, including the fingerprint recognition device described in the first aspect.

[0031] The beneficial effects of the utility model are:

[0032] The fingerprint identification device of the utility model adopts infrared light to illuminate and identify fingers through a glass plate, can be applied to terminal equipment that needs to be provided with protective glass, and can identify live fingerprints, thereby improving security. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an exploded view of the fingerprint recognition device according to the embodiment of the present utility model.

[0034] Figure 2a It is a top view of the fingerprint recognition device according to an embodiment of the present utility model.

[0035] Figure 2b yes Figure 2a AA section view.

[0036] Figure 3 It is a side view of the fingerprint recognition device according to an embodiment of the present utility model.

[0037] Figure 4a It is a front view of the substrate and the devices thereon according to an embodiment of the utility model.

[0038] Figure 4b It is a side view of a substrate and a device thereon according to an embodiment of the utility model.

[0039] Figure 4c It is a back view of the substrate and the devices thereon according to an embodiment of the utility model.

[0040] Figure 5a It is a front perspective schematic diagram of the infrared light guide member of the embodiment of the utility model.

[0041] Figure 5b It is a back perspective schematic diagram of the infrared light guide member of the embodiment of the utility model.

[0042] Figure 5c It is a top view of the infrared light guide member of the embodiment of the utility model.

[0043] Figure 5d yes Figure 5c BB section view.

[0044] Figure 6 It is a side view of the touch detection ring according to the embodiment of the present utility model.

[0045] Figure 7a It is a front perspective schematic diagram of a shading member according to an embodiment of the utility model.

[0046] Figure 7b It is a three-dimensional schematic diagram of the back side of the shading member according to an embodiment of the utility model.

[0047] Figure 7c It is a top view of the shading member according to an embodiment of the utility model.

[0048] Figure 7d yes Figure 7c CC section view.

[0049] Figure 8 It is a schematic diagram of the connection relationship between the breathing light assembly, the shading member and the fingerprint recognition module of an embodiment of the utility model.

[0050] Fig. 9 It is an exploded view of a fingerprint recognition device according to another embodiment of the present invention.

[0051] Fig.10 It is a structural schematic diagram of a touch detection ring according to another embodiment of the utility model.

[0052] Fig.11a It is a front perspective schematic diagram of an infrared light guide member according to another embodiment of the utility model.

[0053] Fig.11b It is a back perspective schematic diagram of an infrared light guide member according to another embodiment of the utility model.

[0054] Fig.12a It is a three-dimensional schematic diagram of a shading member according to another embodiment of the utility model.

[0055] Figure 12b It is a top view of a shading member according to another embodiment of the utility model.

[0056] Fig.13a This is a three-dimensional view of the connection relationship between the breathing light assembly, the shading member and the fingerprint recognition module of another embodiment of the utility model.

[0057] Fig.13bIt is a top view of the connection relationship between the breathing light assembly, the shading member and the fingerprint recognition module of another embodiment of the utility model.

[0058] Fig.14 It is an exploded view of a fingerprint recognition device according to another embodiment of the present invention.

[0059] Fig.15a It is a front perspective schematic diagram of an infrared light guide member according to another embodiment of the utility model.

[0060] Fig.15b It is a back perspective schematic diagram of an infrared light guide member according to another embodiment of the utility model.

[0061] Fig.16a It is a front schematic diagram of a touch detection ring according to another embodiment of the utility model.

[0062] Fig.16b It is a schematic diagram of the back side of a touch detection ring according to another embodiment of the utility model.

[0063] Fig.17 It is a three-dimensional schematic diagram of a shading member according to another embodiment of the utility model.

[0064] In the figure,

[0065] 1. Glass plate; 11. Infrared light transmission area; 12. Visible light transmission area; 2. Infrared light source; 21. Infrared LED lamp; 3. Fingerprint recognition module; 31. Touch detection ring; 311. Positioning lug; 312. Conductive contact surface; 313. Infrared light transmission hole; 32. Infrared light guide; 320. Light guide body; 320', flexible arm; 3201. Conical light outlet surface; 3202. Annular light outlet surface; 321. Lens avoidance hole; 322. Accommodating cavity; 323. Positioning groove; 324. Elastic conductive member avoidance hole; 325. First threaded hole; 326. Second screw fastening hole; 327. First positioning column; 328. Second positioning column; 33. Fingerprint sensor; 331. Sensor chip; 332. Sensor lens; 333. Filter Sheet; 34, substrate; 341, touch detection contact point; 342, first screw fastening hole; 343, second positioning hole; 4, breathing lamp assembly; 41, visible light source; 411, visible light LED lamp; 42, visible light guide; 5, light shielding member; 501, light guide body avoidance hole; 502, flexible arm avoidance gap; 51, visible light guide embedded cavity; 52, visible light source avoidance hole; 53, pressing step; 54, pressing surface; 55, touch detection boss; 56, touch detection contact convex point; 6, elastic conductive member; 7, fixing plate; 71, second threaded hole; 72, first positioning hole; 81, first double-sided tape; 82, second double-sided tape; 83, third double-sided tape; 9, substrate fastening screws; 10, module fastening screws; 20, sealing member. DETAILED DESCRIPTION

[0066] The fingerprint recognition device and the terminal device with fingerprint recognition function provided by the present invention are explained and illustrated in detail below in conjunction with the drawings of the specification.

[0067] This embodiment specifically discloses a fingerprint recognition device for use in terminal equipment that requires a protective glass, such as Figure 1-2b As shown, including:

[0068] The glass plate 1 is provided with an infrared light-transmitting area 11, which is used to provide a touch interface for fingerprint recognition by a finger; the infrared light-transmitting area 11 is a fingerprint recognition area, and the finger can touch this area; preferably, the thickness of the glass plate 1 is 0.7-5 mm, and it can be used as a protective glass of a terminal device. The glass plate 1 can be a decorative glass or a glass of a functional part on the terminal device. In this embodiment, the thickness of the glass plate 1 is 2 mm, and it has an infrared transmittance of 60-85% in the infrared light-transmitting area 11;

[0069] The infrared light source 2 is located below the infrared light-transmitting area 11 of the glass plate 1, and is used to emit infrared light and illuminate the finger to generate return light; the emission wavelength of the infrared light source 2 is set as required. In this embodiment, the emission wavelength of the infrared light source 2 is in the range of 760nm to 1000nm, preferably 850nm. The infrared light source 2 includes one or more infrared LED lamps 21. The multiple infrared LED lamps 21 can be evenly arranged circumferentially within the infrared light-transmitting area 11;

[0070] The fingerprint recognition module 3 is arranged under the glass plate 1 to receive the return light and perform fingerprint recognition on the finger according to the return light. The infrared light emitted by the infrared light source 2 illuminates the finger through the glass plate 1, and the valley ridge feature of the fingerprint of the finger transmits the light reflection to the fingerprint recognition module 3. The fingerprint recognition module 3 processes the collected feature points and compares them with the registered fingerprint data to determine whether the features match. If they match, the unlock command is executed.

[0071] The fingerprint recognition device of the present application also includes a touch detection ring 31, which is used for touch detection. When the touch detection ring 31 detects that a finger touches the infrared light-transmitting area 11 of the glass plate 1, the fingerprint recognition module 3 starts fingerprint recognition. The touch detection ring 31 can be an ITO film (indium tin oxide semiconductor transparent conductive film) or an FPC (flexible circuit board) for capacitive touch detection. The touch detection ring 31 is fixed on the upper surface or inside of the fingerprint recognition module 31. The fingerprint recognition module 3 is provided with a touch detection contact point 341, and the touch detection ring 31 is electrically connected to the touch detection contact point 341. When the touch detection ring 31 detects that a finger touches the infrared light-transmitting area 11 of the glass plate 1, the touch detection ring 31 transmits a signal to the touch detection contact point 341, and the fingerprint recognition module 3 starts working.

[0072] The fingerprint recognition module 3 includes an infrared light guide 32, a fingerprint sensor 33 and a substrate 34. Figure 2b , Figure 3 , Figure 4a-4c As shown, the infrared light source 2 and the fingerprint sensor 33 are arranged on a substrate 34. In this embodiment, the substrate 34 is a PCBA board, and the infrared light source 2 can be mounted on the surface of the PCBA board through SMT (Surface Mount Technology). The substrate 34 is used to carry light sources, chips and other devices, and is also used to connect to the outside, such as connecting to the outside through a connector on the lower surface of the substrate 34. Figure 2b As shown, a accommodating cavity 322 is provided on the lower surface of the infrared light guide 32, the infrared light guide 32 covers the infrared light source 2 in the accommodating cavity 322 and is fixedly connected to the substrate 34, the infrared light guide 32 is used to transmit infrared light, the touch detection ring 31 is fixed on the upper surface of the infrared light guide 32 or embedded in the accommodating cavity 322 of the infrared light guide 32, the touch detection ring 31 is bonded to the surface of the infrared light guide 32 by a second double-sided tape 82; a touch detection contact point 341 is provided on the substrate 34, and the touch detection ring 31 is electrically connected to the touch detection contact point 341 on the substrate 34, thereby realizing touch detection.

[0073] The fingerprint recognition device of the present application further includes a fixing plate 7, through which the fingerprint recognition module 3 is fixedly connected to the glass plate 1. The infrared light guide 32 is fixedly connected to the fixing plate 7, the fixing plate 7 is bonded to the lower surface of the glass plate 1, and the upper surface of the fixing plate 7 is bonded to the lower surface of the glass plate 1 through the first double-sided adhesive 81, thereby achieving a fixed connection between the fingerprint recognition module 3 and the glass plate 1.

[0074] like Figure 5a-5d As shown, the upper surface of the infrared light guide 32 is provided with a conical light emitting surface 3201 whose diameter gradually increases from bottom to top, which is used to transmit and diffuse infrared light. Specifically, the infrared light guide 32 includes a light guide body 320 and a flexible arm 320' on the side of the light guide body 320, and the accommodating cavity 322 is arranged on the lower surface of the light guide body 320. The light guide body 320 is fixedly connected to the substrate 34, and the flexible arm 320' is fixedly connected to the fixing plate 7. The light guide body 320 serves as the main infrared light guiding part, and the upper surface of the light guide body 320 serves as the main light emitting surface. The center of the light guide body 320 is set as a conical light emitting surface 3201, and the outer ring of the conical light emitting surface 3201 is provided with an annular light emitting surface 3202. The annular light emitting surface 3202 is used to connect with the touch detection ring 31 or the fixing plate 7. As shown Figure 1 As shown, the touch detection ring 31 is fixed on the upper surface of the light guide body 320. Figure 6As shown, the upper and lower surfaces of the touch detection ring 31 are fixed with a second double-sided adhesive 82, the lower surface of the touch detection ring 31 is bonded to the annular light-emitting surface 3202 of the light guide body 320 through the second double-sided adhesive 82, the upper surface of the touch detection ring 31 is bonded to the lower surface of the fixing plate 7 through the second double-sided adhesive 82, and the central through hole of the touch detection ring 31 serves as a light-through hole for the infrared light transmitted and diffused by the infrared light guide 32 to pass through. The lower surface of the infrared light guide 32 serves as a light-incoming surface, and the outer edge of the accommodating cavity 322 of the light guide body 320 is fixedly connected to the substrate 34.

[0075] like Figure 1 , 5a As shown in FIG. 5d, flexible arms 320' are symmetrically provided on both sides of the light guide body 320, and the flexible arms 320' can also transmit infrared light. The infrared light guide 32 is made of PC (polycarbonate) or acrylic. At least one first threaded hole 325 is provided on the lower surface of the light guide body 320, such as Figure 1 , 4a -4c, the substrate 34 is provided with first screw fastening holes 342 corresponding to the number and position of the first threaded holes 325. The first screw fastening holes 342 are through holes. The substrate fastening screws 9 are screwed into the aligned first threaded holes 325 and the first screw fastening holes 342 from the back side of the substrate 34. The substrate fastening screws 9 are threadedly connected with the first threaded holes 325 to fix the substrate 34 and the infrared light guide 32. The outer edge of the accommodating cavity 322 of the infrared light guide 32 is tightly attached to the upper surface of the substrate 34. The flexible arm 320' is provided with a second screw fastening hole 326, which is a through hole. The fixing plate 7 is provided with a second threaded hole 71 corresponding to the position of the second screw fastening hole 326. The module fastening screw 10 is screwed into the aligned second screw fastening hole 326 and the second threaded hole 71 from the back of the flexible arm 320'. The module fastening screw 10 is threadedly connected with the second threaded hole 71 to connect the fingerprint recognition module 3 with the fixing plate 7. The schematic diagram after assembly is shown in FIG. Figure 3 As shown, after assembly, the flexible arm 320 ′ is deformed under the action of the fastening force, so that the fingerprint recognition module 3 is under pressure, thereby ensuring the reliability of the fixation of the fingerprint recognition module 3 .

[0076] Optionally, the fingerprint sensor 33 includes a sensor chip 331 and a sensor lens 332. Figure 2bAs shown, the sensor chip 331 is in the accommodating cavity 322 of the infrared light guide 32. The sensor chip 331 is bonded to the upper surface of the substrate 34 by a solid crystal adhesive and bonded by a gold wire. The sensor chip 331 is a camera chip used for infrared light. The infrared light guide 32 is provided with a lens avoidance hole 321 connected to the accommodating cavity 322. The lens avoidance hole 321 is arranged at the center of the conical light outlet surface 3201. The sensor lens 332 is arranged above the sensor chip 331 and extends into the lens avoidance hole 321. The center of the sensor lens 332 is aligned with the center of the sensor chip 331 and then bonded to the upper surface of the substrate 34 by glue. The sensor lens 332 includes a lens bracket and a lens body on the top of the lens bracket. The lens bracket is sleeved above the sensor chip 331. The bottom of the lens bracket is fixedly connected to the substrate 34. Preferably, the bottom of the lens bracket is glued to the upper surface of the substrate 34. The lens body is located above the photosensitive area of ​​the sensor chip 331. The lens body enters the lens avoidance hole 321 to transmit infrared light. Figure 1 As shown, when the touch detection ring 31 is fixed on the upper surface of the infrared light guide 32, a seal 20 is arranged between the lens bracket and the top wall of the accommodating cavity 322 of the infrared light guide 32 to protect the lens; the seal 20 is preferably a sealing foam.

[0077] like Figure 1 As shown, the fingerprint sensor 33 also includes a filter 333 for filtering out light other than infrared light. The filter 333 is fixed above the sensor lens 332 or above the photosensitive area of ​​the sensor chip 331. The filter 333 is glued to the photosensitive area of ​​the sensor chip 331 or the upper surface of the sensor lens 332 to eliminate interference from other stray light and improve the accuracy of fingerprint recognition. In this embodiment, the filter 333 uses an 850nm narrow-band filter. Preferably, the filter 333 is glued to the photosensitive area of ​​the sensor chip 331.

[0078] Optionally, the fingerprint recognition device of the present application further includes a breathing light assembly 4 and a shading member 5. The breathing light assembly 4 is used to indicate the location of the fingerprint recognition area; the shading member 5 is used to block the light emitted by the breathing light assembly 4 from entering the infrared light transmission area to avoid interference with the transmission of infrared light and improve the accuracy of fingerprint recognition. Figure 1 As shown, the breathing lamp assembly 4 includes a visible light source 41 and a visible light guide 42. A visible light transparent area 12 is provided on the glass plate 1. The visible light transparent area 12 is arranged near the infrared transparent area 11 to indicate the location of the fingerprint recognition area. The other areas of the glass plate 1 are opaque areas and can be coated with ink. One or more visible light transparent areas 12 can be provided, and multiple visible light transparent areas 12 can be evenly distributed around the infrared transparent area 11. The number and shape of the visible light transparent areas 12 can be set as needed, such as Figure 1As shown, the number of visible light transmission areas 12 is 2, both of which are arc-shaped. The light source of the breathing lamp assembly 4, i.e., the visible light source 41, is arranged on the substrate 34 and below the visible light transmission area 12. The visible light guide 42 is arranged between the visible light source 41 and the visible light transmission area 12 of the glass plate 1. The number and position of the visible light source 41 and the visible light guide 42 correspond to the number and position of the visible light transmission areas 12 on the glass plate 1. In this embodiment, the visible light source 41 is a visible light LED lamp 411, and the visible light source 41 is mounted on the upper surface of the substrate 34 by the SMT process. The visible light source 41 is located outside the accommodating cavity 322 of the infrared light guide 32. The shading member 5 is used to block visible light from entering the infrared light transmission area. The shading member 5 is sleeved on the infrared light guide 32 or pressed on the substrate 34 through the infrared light guide 32.

[0079] like Figures 7a-7d As shown, the light shielding member 5 is provided with a visible light guide member embedding cavity 51 and a visible light source avoidance hole 52, the visible light guide member embedding cavity 51 is arranged on the upper surface of the light shielding member 5, and the visible light source avoidance hole 52 is arranged on the lower surface of the light shielding member 5; the visible light guide member embedding cavity 51 and the visible light source avoidance hole 52 are connected, the visible light guide member 42 is embedded in the visible light guide member embedding cavity 51, and the visible light emitted by the visible light source 41 enters the visible light guide member embedding cavity 51 through the visible light source avoidance hole 52, and is transmitted to the visible light transmission area 12 on the glass plate 1 through the visible light guide member 42. The side cavity wall of the visible light guide member embedding cavity 51 is higher than the upper surface of the visible light guide member 42, and the light shielding effect is better; the visible light source 41 is in the visible light source avoidance hole 52, so as to avoid affecting the installation of the visible light source 41.

[0080] The shape of the shading member 5 can be designed as required, such as Figures 7a-7d As shown, a light guide body avoidance hole 501 is provided at the center of the light shielding member 5, and a flexible arm avoidance notch 502 is provided on the lower surface of the light shielding member 5. Figure 8 As shown, the shading member 5 is sleeved on the infrared light guide member 32, and the shading member 5 is sleeved on the light guide member body 320 through the light guide member body avoidance hole 501 and surrounds the light emitting surface of the light guide member body 320, and a part of the flexible arm 320' is embedded in the flexible arm avoidance notch 502, thereby realizing a reliable connection between the breathing lamp assembly 4 and the fingerprint recognition module 3.

[0081] In this embodiment, the shading member 5 is a conductive shading member, the upper surface of the shading member 5 contacts the touch detection ring 31, and the lower surface of the shading member 5 contacts the touch detection contact point 341, and the touch detection ring 31 and the touch detection contact point 341 are electrically connected through the shading member 5. The conductive shading member 5 can be made of conductive silicone rubber. Figures 7a-7dAs shown, a touch detection boss 55 is provided on the upper surface of the shading member 5. The touch detection boss 55 is annular and is arranged on the periphery of the avoidance hole 501 of the light guide body. A touch detection contact convex point 56 corresponding to the number and position of the touch detection contact point 341 is provided on the lower surface of the shading member 5. In this embodiment, the number of the touch detection contact convex point 56 and the touch detection contact point 341 are both 2. After the shading member 5 and the fingerprint recognition module 3 are assembled, the touch detection boss 55 contacts the metal circuit exposed on the periphery of the lower surface of the touch detection ring 31, and the touch detection contact convex point 56 contacts the touch detection contact point 341 on the substrate 34, so as to realize the electrical connection between the touch detection ring 31 and the touch detection contact point 341. The deformation of the flexible arm 320' under the action of the fastening force ensures the good contact between the touch detection boss 55 and the touch detection ring 31, and the touch detection contact convex point 56 and the touch detection contact point 341 on the substrate 34.

[0082] In another embodiment, if Fig. 9 As shown, the touch detection ring 31 is fixed on the upper surface of the infrared light guide 32, and the upper surface of the touch detection ring 31 is bonded to the lower surface of the fixing plate 7 through the second double-sided adhesive 82, and the lower surface of the touch detection ring 31 is bonded to the annular light emitting surface 3201 of the light guide body 320 through the second double-sided adhesive 82. The touch detection ring 31 is electrically connected to the touch detection contact point 341 through the elastic conductive member 6, and the bottom of the elastic conductive member 6 is in contact with the touch detection contact point 341 of the substrate 34. Preferably, the bottom of the elastic conductive member 6 is mounted on the touch detection contact point 341 of the substrate 34 through the SMT process, and the top of the elastic conductive member 6 is in contact with the touch detection ring 31. At this time, the shading member is made of a non-conductive material, such as silicone rubber or plastic. Fig.10 As shown, the lower surface of the touch detection ring 31 is provided with a conductive contact surface 312 corresponding to the number and position of the touch detection contact points 341, and the top of the elastic conductive member 6 is in contact with the conductive contact surface 321. Preferably, the elastic conductive member 6 is a spring connector (pogo pin). Fig.11a and 11b As shown, the infrared light guide 32 is provided with an elastic conductive member avoidance hole 324, through which the elastic conductive member 6 passes to contact the touch detection ring 31. The touch detection ring 31 is sandwiched between the infrared light guide 32 and the fixing plate 7, and the deformation of the flexible arm 320' under the action of the fastening force also ensures good contact between the elastic conductive member 6 and the touch detection ring 31.

[0083] like Fig. 9 As shown, there are four visible light transmission areas 12, all of which are rectangular, and the four visible light transmission areas 12 are evenly distributed around the infrared transmission area 11. Fig. 9 , Fig.12a and Figure 12bAs shown, the shading members 5 are provided as four independent ones, each of which is provided with a visible light guide member embedding cavity 51. In this embodiment, the shading members 5 are pressed on the substrate 34 through the infrared light guide member 32, and a pressing step 53 is provided outside the visible light guide member embedding cavity 51 on the upper surface of the shading member 5, as shown in FIG. Fig.13a and 13b As shown, the lower surface edge of the light guide body 320 is pressed on the pressing steps 53 of the four shading members 5, the lower surface of the shading member 5 is tightly attached to the upper surface of the substrate 34, and the four shading members 5 avoid the flexible arm 320', thereby achieving a fixed connection between the shading member 5 and the fingerprint recognition module 3.

[0084] In some embodiments, Fig. 9 , 11a As shown in Figure 11b, a first positioning hole 72 is formed on the upper surface of the flexible arm 320' and the fixed plate 7, and a first positioning column 327 matching the first positioning hole 72 is formed on the other. Preferably, the fixed plate 7 is provided with a first positioning hole 72, and the upper surface of the flexible arm 320' is provided with a first positioning column 327 matching the first positioning hole 72; a second positioning hole 343 is formed on the lower surface of the light guide body 320 and the substrate 34, and a second positioning column 328 matching the second positioning hole 343 is formed on the other. Preferably, the substrate 34 is provided with a second positioning hole 343, and the lower surface of the light guide body 320 is provided with a second positioning column 328 matching the second positioning hole 343. Before tightening the screws, the positioning columns are inserted into the corresponding positioning holes for alignment and positioning, which reduces the difficulty during assembly and improves the accuracy after assembly.

[0085] In yet another embodiment, Fig.14 As shown, the touch detection ring 31 is fixed in the accommodating cavity 322 of the infrared light guide 32, and the touch detection ring 31 is located above the infrared light source 2. Figures 15a-16bAs shown, an infrared light transmission hole 313 is provided on the ring surface of the touch detection ring 31, a positioning groove 323 communicating with the accommodating cavity 322 is provided on the light guide body 320, and a positioning lug 311 matching the positioning groove 323 is provided on the touch detection ring 31. The number of the positioning groove 323 and the positioning lug 311 are both two and symmetrically arranged. The upper surface of the touch detection ring 31 is bonded to the top wall of the accommodating cavity 322 through the second double-sided adhesive 82. At this time, the annular light emitting surface 3202 of the infrared light guide 32 is bonded to the lower surface of the fixing plate 7 through the third double-sided adhesive 83. The central through hole of the touch detection ring 31 is used as a lens avoidance hole. The sensor lens 332 passes through the central through hole of the touch detection ring 31 and enters the lens avoidance hole 321 of the infrared light guide 32. A sealing member 20 is arranged between the lower surface of the touch detection ring 31 and the lens bracket to protect the lens. The sealing member 20 is glued to the upper surface of the lens bracket. The touch detection ring 31 is electrically connected to the touch detection contact point 341 on the substrate 34 through the elastic conductive member 6. The touch detection contact point 341 and the elastic conductive member 6 are in the accommodating cavity 322. After the light guide body 320 is connected to the substrate 34, the top of the elastic conductive member 6 directly contacts the conductive contact surface 312 of the touch detection ring 31 to achieve electrical connection. At this time, the light shielding member is made of non-conductive material, such as silicone rubber or plastic.

[0086] like Fig.14 As shown, there are four visible light transmission areas 12, all of which are rectangular, and the four visible light transmission areas 12 are evenly distributed around the infrared transmission area 11. Fig.14 and 17 As shown, the light shading member 5 is provided with two independent ones, and two visible light guide member embedding cavities 51 are opened on each light shading member 5. A pressing surface 54 is provided outside the visible light guide member embedding cavity 51 on the upper surface of the light shading member 5, that is, the connecting part between the two visible light guide member embedding cavities 51 serves as the pressing surface 54, and the lower surface edge of the light guide member body 320 is pressed on the pressing surface 54, and the pressing surface 54 is pressed between the light guide member body 320 and the substrate 34, so as to realize the connection between the light shading member 5 and the fingerprint recognition module 3.

[0087] The present application also discloses a terminal device with a fingerprint recognition function, including the fingerprint recognition device described in the above embodiment. The terminal device with a fingerprint recognition function is a device that needs to be provided with a protective glass and requires fingerprint recognition, and can be a car, a door lock, a security device, etc. The thickness of the protective glass is preferably 0.7 to 5 mm. The fingerprint recognition device of the present application can effectively realize fingerprint recognition under the protective glass and improve the safety of the security device.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any at least one embodiment or example. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and simple improvement made to the essential content of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fingerprint recognition device, characterized in that: include: The glass plate (1) is provided with an infrared light-transmitting area (11) for providing a touch interface for fingerprint recognition of a finger; an infrared light source (2), located below the infrared light-transmitting area (11) of the glass plate (1), and used for emitting infrared light and irradiating the finger to generate return light; A fingerprint recognition module (3) is arranged below the glass plate (1) to receive the return light and perform fingerprint recognition on the finger based on the return light.

2. The fingerprint recognition device according to claim 1, characterized in that: It also includes a touch detection ring (31), the touch detection ring (31) is fixed on the upper surface or inside of the fingerprint recognition module (3), the fingerprint recognition module (3) is provided with a touch detection contact point (341), and the touch detection ring (31) is electrically connected to the touch detection contact point (341).

3. The fingerprint recognition device according to claim 2, characterized in that: The touch detection ring (31) is electrically connected to the touch detection contact point (341) via an elastic conductive member (6); the bottom of the elastic conductive member (6) is in contact with the touch detection contact point (341), and the top of the elastic conductive member (6) is in contact with the touch detection ring (31).

4. The fingerprint recognition device according to claim 2, characterized in that: It also comprises a breathing lamp assembly (4) and a light shielding member (5), wherein the light shielding member (5) is used to block the light emitted by the breathing lamp assembly (4) from entering the infrared light transmission area.

5. The fingerprint recognition device according to claim 4, characterized in that: The shading member (5) is a conductive shading member, the upper surface of the shading member (5) is in contact with the touch detection ring (31), and the lower surface of the shading member (5) is in contact with the touch detection contact point (341).

6. The fingerprint recognition device according to claim 5, characterized in that: The fingerprint recognition module (3) comprises an infrared light guide (32), a fingerprint sensor (33) and a substrate (34); the infrared light source (2) and the fingerprint sensor (33) are arranged on the substrate (34); a receiving cavity (322) is provided on the lower surface of the infrared light guide (32); the infrared light guide (32) covers the infrared light source (2) in the receiving cavity (322) and is fixedly connected to the substrate (34); the touch detection ring (31) is fixed on the upper surface of the infrared light guide (32); and the touch detection contact point (341) is provided on the substrate (34).

7. The fingerprint recognition device according to claim 5, characterized in that: The upper surface of the shading member (5) is provided with a touch detection boss (55), and the lower surface of the shading member (5) is provided with touch detection contact convex points (56) corresponding to the number and position of the touch detection contact points (341).

8. The fingerprint recognition device according to claim 4, characterized in that: The breathing lamp assembly (4) comprises a visible light source (41) and a visible light guide (42); a visible light transmission area (12) is provided on the glass plate (1); the visible light source (41) is arranged below the visible light transmission area (12); the visible light guide (42) is arranged between the visible light source (41) and the visible light transmission area (12) of the glass plate (1); and the light shielding member (5) is used to block visible light from entering the infrared light transmission area.

9. The fingerprint recognition device according to claim 8, characterized in that: The shading member (5) is provided with a visible light guide member embedding cavity (51) and a visible light source avoidance hole (52); the visible light guide member embedding cavity (51) is arranged on the upper surface of the shading member (5), and the visible light source avoidance hole (52) is arranged on the lower surface of the shading member (5); the visible light guide member embedding cavity (51) and the visible light source avoidance hole (52) are connected; the visible light guide member (42) is embedded in the visible light guide member embedding cavity (51), and the visible light emitted by the visible light source (41) enters the visible light guide member embedding cavity (51) through the visible light source avoidance hole (52).

10. The fingerprint recognition device according to claim 9, characterized in that: The visible light source (41) is located in the visible light source avoidance hole (52).

11. The fingerprint recognition device according to claim 2 or 4, characterized in that: The fingerprint recognition module (3) comprises an infrared light guide (32), a fingerprint sensor (33) and a substrate (34); the infrared light source (2) and the fingerprint sensor (33) are arranged on the substrate (34); a receiving cavity (322) is provided on the lower surface of the infrared light guide (32); the infrared light guide (32) covers the infrared light source (2) in the receiving cavity (322) and is fixedly connected to the substrate (34); the touch detection ring (31) is fixed on the upper surface of the infrared light guide (32) or embedded in the receiving cavity (322) of the infrared light guide (32); and the touch detection contact point (341) is provided on the substrate (34).

12. The fingerprint recognition device according to claim 11, characterized in that: The upper surface of the infrared light guide (32) is provided with a conical light-emitting surface (3201) whose diameter gradually increases from bottom to top.

13. The fingerprint recognition device according to claim 11, characterized in that: It also comprises a fixing plate (7), and the fingerprint recognition module (3) is fixedly connected to the glass plate (1) via the fixing plate (7).

14. The fingerprint recognition device according to claim 13, characterized in that: The infrared light guide element (32) is fixedly connected to the fixing plate (7).

15. The fingerprint recognition device according to claim 13, characterized in that: The infrared light guide (32) comprises a light guide body (320) and a flexible arm (320') on the side of the light guide body (320); the accommodating cavity (322) is arranged on the lower surface of the light guide body (320); the light guide body (320) is fixedly connected to the substrate (34); and the flexible arm (320') is fixedly connected to the fixing plate (7).

16. The fingerprint recognition device according to claim 13, characterized in that: The fixing plate (7) is bonded to the lower surface of the glass plate (1).

17. The fingerprint recognition device according to claim 11, characterized in that: The fingerprint sensor (33) comprises a sensor chip (331) and a sensor lens (332); the sensor chip (331) is located in a receiving cavity (322) of the infrared light guide (32); a lens avoidance hole (321) communicating with the receiving cavity (322) is provided on the infrared light guide (32); and the sensor lens (332) is arranged above the sensor chip (331) and extends into the lens avoidance hole (321).

18. The fingerprint recognition device according to claim 17, characterized in that: The fingerprint sensor (33) further comprises a filter (333) for filtering out light other than infrared light, and the filter (333) is fixed above the sensor lens (332) or above the photosensitive area of ​​the sensor chip (331).

19. The fingerprint recognition device according to claim 11, characterized in that: When the touch detection ring (31) is embedded in the accommodating cavity (322) of the infrared light guide (32), the touch detection ring (31) is located above the infrared light source (2), and an infrared light transmission hole (313) is provided on the touch detection ring (31).

20. The fingerprint recognition device according to claim 4, characterized in that: The fingerprint recognition module (3) comprises an infrared light guide (32), a fingerprint sensor (33) and a substrate (34); the infrared light source (2) and the fingerprint sensor (33) are arranged on the substrate (34); a receiving cavity (322) is provided on the lower surface of the infrared light guide (32); the infrared light guide (32) covers the infrared light source (2) in the receiving cavity (322) and is fixedly connected to the substrate (34); the touch detection ring (31) is fixed on the upper surface of the infrared light guide (32) or embedded in the receiving cavity (322) of the infrared light guide (32); and the touch detection contact point (341) is provided on the substrate (34); the light source of the breathing lamp assembly (4) is arranged on the substrate (34); and the light shielding member (5) is sleeved on the infrared light guide (32) or pressed on the substrate (34) through the infrared light guide (32).

21. The fingerprint recognition device according to claim 20, characterized in that: The infrared light guide (32) comprises a light guide body (320) and a flexible arm (320') on the side of the light guide body (320); the accommodating cavity (322) is arranged on the lower surface of the light guide body (320); the light guide body (320) is fixedly connected to the substrate (34); a light guide body avoidance hole (501) is opened at the center of the light shielding member (5); a flexible arm avoidance notch (502) is arranged on the lower surface of the light shielding member (5); the light shielding member (5) is sleeved on the light guide body (320) through the light guide body avoidance hole (501); a part of the flexible arm (320') is embedded in the flexible arm avoidance notch (502).

22. The fingerprint recognition device according to claim 20, characterized in that: The infrared light guide (32) comprises a light guide body (320) and a flexible arm (320') on the side of the light guide body (320); the accommodating cavity (322) is arranged on the lower surface of the light guide body (320); the light guide body (320) is fixedly connected to the substrate (34); the upper surface of the light shielding member (5) is provided with a pressing step (53) or a pressing surface (54); the edge of the lower surface of the light guide body (320) is pressed on the pressing step (53) or the pressing surface (54) to press the light shielding member (5) onto the substrate (34).

23. The fingerprint recognition device according to claim 1, characterized in that: The infrared light source (2) comprises one or more infrared LED lamps (21).

24. A terminal device with fingerprint recognition function, characterized in that: A fingerprint recognition device comprising any one of claims 1-23.

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