WO2020146985A1 - 指纹识别装置和电子设备 - Google Patents

指纹识别装置和电子设备 Download PDF

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Publication number
WO2020146985A1
WO2020146985A1 PCT/CN2019/071661 CN2019071661W WO2020146985A1 WO 2020146985 A1 WO2020146985 A1 WO 2020146985A1 CN 2019071661 W CN2019071661 W CN 2019071661W WO 2020146985 A1 WO2020146985 A1 WO 2020146985A1
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WO
WIPO (PCT)
Prior art keywords
fingerprint
identification device
fingerprint identification
sensor chip
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/071661
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English (en)
French (fr)
Inventor
郭益平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
Original Assignee
Shenzhen Goodix Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Goodix Technology Co Ltd filed Critical Shenzhen Goodix Technology Co Ltd
Priority to CN201980000118.5A priority Critical patent/CN109844765B/zh
Priority to PCT/CN2019/071661 priority patent/WO2020146985A1/zh
Publication of WO2020146985A1 publication Critical patent/WO2020146985A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • the embodiments of the present application relate to the field of fingerprint identification technology, and more specifically, to fingerprint identification devices and electronic equipment.
  • a fingerprint identification device and electronic equipment are provided, which can realize under-screen fingerprint identification with a simple and convenient process.
  • a fingerprint identification device which is applied to an electronic device with a display screen, and the fingerprint identification device includes:
  • a support plate, the edge position of the support plate has an upwardly tilted buckle structure, and the buckle structure is used to be installed in the card slot of the middle frame of the electronic device;
  • At least one fingerprint sensor chip arranged above the support plate and arranged below the display screen through the support plate;
  • the at least one fingerprint sensor chip is used to receive a fingerprint detection signal returned by reflection or scattering of a human finger above the display screen, and the fingerprint detection signal is used to detect fingerprint information of the finger.
  • the buckle structure includes at least one buckle, and at least one first buckle is provided on the upper surface of the middle frame, wherein the at least one buckle is used for mounting to the In at least one first card slot, and the at least one buckle corresponds to the at least one first card slot one to one.
  • an edge connecting portion is further formed in the horizontal direction of the edge position of the support plate, a second card slot is provided on the lower surface of the middle frame, and the edge connecting portion is used for mounting in In the second card slot.
  • the edge connecting portion is a plurality of edge connecting portions
  • the second card slot is a plurality of second card slots
  • the plurality of edge connecting portions are used for mounting to the plurality of edge connecting portions.
  • the plurality of edge connection portions correspond to the plurality of second slot in a one-to-one correspondence.
  • the at least one buckle and the plurality of edge connecting portions are alternately arranged at the edge position of the support plate.
  • the supporting plate is rectangular, and the at least one buckle and the plurality of edge connecting portions are alternately arranged on two short sides and one long side of the supporting plate.
  • a recessed portion inward from the side surface of the support plate is provided between the buckle and the edge connecting portion.
  • the buckle has a right-angled L-shape or a round-cornered L-shape.
  • the fingerprint identification device further includes:
  • a circuit board at least part of the circuit board is connected to an edge position on one side of the upper surface of the support board, and the circuit board is connected to the at least one fingerprint sensor chip.
  • At least part of the circuit board is connected to an edge position on a side of the upper surface of the supporting board far away from the buckle structure.
  • the at least one fingerprint sensor chip is a plurality of optical fingerprint sensor chips
  • at least one bending groove is provided on one end of the circuit board close to the plurality of optical fingerprint sensor chips
  • One of the at least one bending groove corresponds to a space area between adjacent optical fingerprint sensor chips.
  • the bending groove is a U-shaped groove.
  • the circuit board is a T-shaped flexible circuit board, and a plurality of capacitors are arranged above the T-shaped flexible circuit board, and the plurality of capacitors are respectively connected to the at least one Fingerprint sensor chip.
  • the fingerprint identification device further includes:
  • the light filter is arranged on the upper surface of the at least one fingerprint sensor chip, wherein the reflectance of the light entrance surface of the light filter is lower than the first threshold.
  • the light entrance surface of the filter is processed by optical inorganic coating, or an organic blackening layer is coated to make the reflectance of the light entrance surface of the filter lower than the first Threshold.
  • the filter is fixedly connected to the non-sensing area of the at least one fingerprint sensor chip by means of glue dispensing.
  • the circuit board is connected to the at least one fingerprint sensor chip through a gold wire, wherein the arc height or package height of the gold wire is lower than or parallel to the progress of the filter. Glossy.
  • the fingerprint identification device further includes:
  • the flexible reinforcing plate is arranged on the lower surface of the at least one fingerprint sensor chip, and the at least one fingerprint sensor chip is arranged above the supporting plate through the flexible reinforcing plate.
  • the at least one fingerprint sensor chip includes a plurality of optical fingerprint sensor chips, and a first positioning hole is provided along a specific edge on the flexible reinforcing plate, the second A positioning hole corresponds to the spaced area between adjacent optical fingerprint sensor chips among the plurality of optical fingerprint sensor chips.
  • the shape of the opening of the first positioning hole is an oblong or elliptical shape.
  • a second positioning hole is provided on the support plate, and the second positioning hole corresponds to an interval area between adjacent optical fingerprint sensor chips among the plurality of optical fingerprint sensor chips.
  • the shape of the opening of the second positioning hole is an oblong or elliptical shape.
  • first positioning holes there are multiple first positioning holes, multiple second positioning holes, and multiple first positioning holes correspond to multiple second positioning holes in a one-to-one correspondence.
  • the thickness of the flexible reinforcing plate is between 0.075 mm and 0.15 mm.
  • the surface roughness of the flexible reinforcing plate is greater than 0.25 ⁇ m.
  • the electronic device further includes:
  • At least one foam is arranged between the flexible reinforcing plate and the support plate, and the at least one foam corresponds to the at least one fingerprint sensor chip one to one.
  • the support plate is made of metal, and the thickness of the support plate is between 0.15 mm and 0.20 mm.
  • the surface roughness of the support plate is greater than 0.25 ⁇ m.
  • the fingerprint identification device is in contact with the lower surface of the light-emitting unit in the lower middle area of the display screen of the electronic device; or the fingerprint identification device is in contact with the display screen.
  • the lower surface of the light emitting unit in the lower middle area of the area is not in contact, and the distance between the upper surface of the fingerprint sensor chip and the lower surface of the display screen is smaller than a third threshold.
  • the flexible reinforcing plate is made of PI material.
  • the flexible reinforcing plate is black, or other colors that are non-reflective, such as gun color, and the flexible reinforcing plate is set to a non-reflective color to prevent damage from The light signal reflected on the surface of the sexual reinforcement plate enters the sensor chip, which affects the fingerprint detection performance.
  • an electronic device including:
  • the middle frame is provided with a card slot for arranging the buckle structure on the supporting plate of the fingerprint identification device in the groove, wherein the fingerprint identification device is set on the display screen through the middle frame Below to perform under-screen fingerprint detection.
  • a light-transmitting opening is provided on the middle frame, and the light-transmitting opening is used to transmit the fingerprint detection signal returned by the reflection or scattering of the human finger above the display screen to At least one fingerprint sensor chip of the fingerprint identification device.
  • At least one first slot is provided on the edge of the light-transmitting opening on the upper surface of the middle frame, and the buckle structure includes at least one buckle, wherein the at least One buckle is used to be installed in the at least one first slot, and the at least one buckle corresponds to the at least one first slot one-to-one.
  • a second slot is provided at an edge position of the light-transmitting opening on the lower surface of the middle frame, and an edge connecting portion is formed in the horizontal direction of the edge position of the support plate, so The edge connecting portion is used to be installed in the second card slot.
  • the edge connecting portion is a plurality of edge connecting portions
  • the second card slot is a plurality of second card slots
  • the plurality of edge connecting portions are used for mounting to the plurality of edge connecting portions.
  • the plurality of edge connection portions correspond to the plurality of second slot in a one-to-one correspondence.
  • the at least one first card slot and the plurality of second card slots are alternately arranged at the edge position of the light-transmitting opening.
  • the light-transmitting opening is rectangular, and the at least one first card slot and the plurality of second card slots are alternately arranged on two short sides and one long side of the light-transmitting opening. The corresponding edge position on the edge.
  • the light-transmitting opening is arranged in the middle area or the lower middle area of the middle frame, so that the fingerprint detection area of the at least one fingerprint sensor chip is located in the display area of the display screen.
  • an opening is also provided on the middle frame close to the circuit board of the fingerprint identification device, so that a plurality of capacitors provided on the circuit board are exposed from the upper surface of the middle frame .
  • the fingerprint identification device is in contact with the lower surface of the light-emitting unit in the middle area or the lower middle area of the display screen of the electronic device; or the fingerprint identification device is in contact with the display screen.
  • the lower surface of the light emitting unit in the middle area or the lower middle area is not in contact, and the distance between the upper surface of the fingerprint sensor chip and the lower surface of the display screen is less than a third threshold.
  • the third threshold value is 600 ⁇ m.
  • the fingerprint identification device can be directly fixedly connected to the card slot of the middle frame of the electronic device through the buckle structure on the support plate, instead of being directly fixed to the display screen or integrating the fingerprint identification device and the display screen , It is easy to realize, and has low requirements on processing technology, and it is easy to realize simple and convenient fingerprint recognition under the screen.
  • Fig. 1A is a directional view of an electronic device according to an embodiment of the present application.
  • Fig. 1B is a schematic diagram of a partial cross-sectional structure of the electronic device shown in Fig. 1A along A-A'.
  • Fig. 2 is a schematic diagram of a typical installation position of a fingerprint identification device according to an embodiment of the present application.
  • Fig. 3 is a directional view of a fingerprint identification device according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a partial cross-sectional structure of the electronic device shown in Fig. 2 along A-A'.
  • Fig. 5 is a schematic diagram of a middle frame structure according to an embodiment of the present application.
  • Fig. 6 is a directional view of a support plate according to an embodiment of the present application.
  • Fig. 7 is a partial view of a fingerprint identification device according to an embodiment of the present application.
  • Fig. 8 is an assembly schematic diagram of a fingerprint identification device according to an embodiment of the present application.
  • the optical fingerprint system provided in the embodiments of this application can be applied to smart phones, tablet computers, and other mobile terminals with display screens or other terminal devices; more specifically, in the above-mentioned terminal devices, fingerprint identification
  • the device may specifically be an optical fingerprint device, which may be arranged in a partial area or an entire area below the display screen, thereby forming an under-display optical fingerprint system.
  • FIG. 1A and 1B show schematic diagrams of electronic devices to which the embodiments of the present application can be applied.
  • FIG. 1 is a front schematic view of the electronic device 10
  • FIG. 1B is the electronic device 10 shown in FIG. Partial sectional structure diagram.
  • the electronic device 10 includes a display screen 120 and an optical fingerprint device 130, wherein the optical fingerprint device 130 is disposed in a partial area below the display screen 120, for example, the middle area of the display screen.
  • the optical fingerprint device 130 includes an optical fingerprint sensor, and the optical fingerprint sensor includes a sensing array with a plurality of optical sensing units, and the area where the sensing array is located or its sensing area is the fingerprint detection area 103 of the optical fingerprint device 130.
  • the fingerprint detection area 103 is located in the display area of the display screen 120.
  • the area of the fingerprint detection area 103 may be different from the area of the sensing array of the optical fingerprint device 130, for example, through an optical path design such as lens imaging, a reflective folding optical path design, or other optical path design such as light convergence or reflection.
  • the area of the fingerprint detection area 103 of the optical fingerprint device 130 can be made larger than the area of the sensing array of the optical fingerprint device 130.
  • the fingerprint detection area 103 of the optical fingerprint device 130 may also be designed to be substantially the same as the area of the sensing array of the optical fingerprint device 130.
  • the electronic device 10 adopting the above structure does not need to reserve space on the front side to set fingerprint buttons (such as the Home button), so that a full screen solution can be adopted, that is, the display area of the display screen 120 It can be basically extended to the front of the entire electronic device 10.
  • the optical fingerprint device 130 includes a light detecting part 134 and an optical component 132, and the light detecting part 134 includes the sensor array and is electrically connected to the sensor array.
  • the connected reading circuit and other auxiliary circuits can be fabricated on a chip (Die) by a semiconductor process, such as an optical imaging chip or an optical fingerprint sensor.
  • the sensing array is specifically a photodetector (Photodetector) array, which includes A plurality of photodetectors distributed in an array, the photodetectors can be used as the above-mentioned optical sensing unit; the optical component 132 can be arranged above the sensing array of the photodetecting part 134, which can specifically include A filter, a light guide layer or a light path guide structure, and other optical elements.
  • the filter layer can be used to filter ambient light penetrating the finger, for example, infrared light that interferes with imaging, and the light guide layer Or the optical path guiding structure is mainly used to guide the reflected light reflected from the finger surface to the sensing array for optical detection.
  • the optical assembly 132 and the light detecting part 134 may be packaged in the same optical fingerprint component.
  • the optical component 132 and the optical detection part 134 can be packaged in the same optical fingerprint chip, or the optical component 132 can be arranged outside the chip where the optical detection part 134 is located, for example, the optical component 132 is attached above the chip, or some components of the optical assembly 132 are integrated into the chip.
  • the light guide layer or light path guiding structure of the optical component 132 has multiple implementation schemes.
  • the light guide layer may specifically be a collimator layer made on a semiconductor silicon wafer, which has multiple A collimating unit or a micro-hole array
  • the collimating unit can be specifically a small hole
  • the reflected light reflected from the finger the light that is perpendicularly incident on the collimating unit can pass through and be the optical sensing unit below it
  • the light with an excessively large incident angle is attenuated by multiple reflections inside the collimating unit. Therefore, each optical sensor unit can basically only receive the reflected light reflected by the fingerprint pattern directly above it.
  • the sensor array can detect the fingerprint image of the finger.
  • the light guide layer or the light path guide structure may also be an optical lens (Lens) layer, which has one or more lens units, such as a lens group composed of one or more aspheric lenses, which The sensing array used to converge the reflected light reflected from the finger to the light detection part 134 below it, so that the sensing array can perform imaging based on the reflected light, thereby obtaining a fingerprint image of the finger.
  • the optical lens layer may further have a pinhole formed in the optical path of the lens unit, and the pinhole may cooperate with the optical lens layer to expand the field of view of the optical fingerprint device to improve the optical The fingerprint imaging effect of the fingerprint device 130.
  • the light guide layer or the light path guide structure may also specifically adopt a micro-lens (Micro-Lens) layer.
  • the micro-lens layer has a micro-lens array formed by a plurality of micro-lenses, which can be grown by semiconductors.
  • a process or other processes are formed above the sensing array of the light detecting part 134, and each microlens may correspond to one of the sensing units of the sensing array.
  • other optical film layers may be formed between the micro lens layer and the sensing unit, such as a dielectric layer or a passivation layer.
  • the micro lens layer and the sensing unit may also include The light-blocking layer of the micro-hole, wherein the micro-hole is formed between its corresponding micro-lens and the sensing unit, the light-blocking layer can block the optical interference between the adjacent micro-lens and the sensing unit, and make the sensing
  • the light corresponding to the unit is condensed into the microhole through the microlens and is transmitted to the sensing unit through the microhole to perform optical fingerprint imaging.
  • a microlens layer can be further provided under the collimator layer or the optical lens layer.
  • the collimator layer or the optical lens layer is used in combination with the microlens layer, its specific laminated structure or optical path may need to be adjusted according to actual needs.
  • the display screen 120 may be a display screen with a self-luminous display unit, such as an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display or a micro-LED (Micro-LED) display Screen.
  • OLED Organic Light-Emitting Diode
  • the optical fingerprint device 130 may use the display unit (ie, an OLED light source) of the OLED display screen 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection.
  • the display screen 120 emits a beam of light to the target finger above the fingerprint detection area 103. The light is reflected on the surface of the finger to form reflected light or is scattered inside the finger. Form scattered light.
  • the above-mentioned reflected light and scattered light are collectively referred to as reflected light. Because the ridge and valley of the fingerprint have different light reflection capabilities, the reflected light from the fingerprint ridge and the emitted light from the fingerprint ridge have different light intensities. After the reflected light passes through the optical components, it is affected by the optical fingerprint.
  • the sensing array in the device 130 receives and converts into a corresponding electrical signal, that is, a fingerprint detection signal; based on the fingerprint detection signal, fingerprint image data can be obtained, and fingerprint matching verification can be further performed, thereby implementing the electronic device 10 Optical fingerprint recognition function.
  • the optical fingerprint device 130 may also use a built-in light source or an external light source to provide an optical signal for fingerprint detection.
  • the electronic device 10 further includes a transparent protective cover, which may be a glass cover or a sapphire cover, which is located above the display screen 120 and covers the electronic The front of the device 10.
  • a transparent protective cover which may be a glass cover or a sapphire cover, which is located above the display screen 120 and covers the electronic The front of the device 10.
  • the optical fingerprint device 130 may include only one optical fingerprint sensor.
  • the fingerprint detection area 103 of the optical fingerprint device 130 has a small area and a fixed position, so the user is performing fingerprint input At this time, it is necessary to press the finger to a specific position of the fingerprint detection area 103, otherwise the optical fingerprint device 130 may not be able to collect fingerprint images, resulting in poor user experience.
  • the optical fingerprint device 130 may specifically include multiple optical fingerprint sensors; the multiple optical fingerprint sensors may be arranged side by side in the middle area of the display screen 120 in a splicing manner, and the multiple The sensing area of the optical fingerprint sensor together constitutes the fingerprint detection area 103 of the optical fingerprint device 130.
  • the fingerprint detection area 103 of the optical fingerprint device 130 may include multiple sub-areas, and each sub-area corresponds to the sensing area of one of the optical fingerprint sensors, so that the fingerprint collection area 103 of the optical fingerprint module 130 It can be extended to the main area of the middle part of the display screen, that is, to the area where the finger is habitually pressed, so as to realize the blind fingerprint input operation.
  • the fingerprint detection area 130 can also be extended to half of the display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.
  • the present application provides an under-screen fingerprint identification solution, which can install the fingerprint identification device under the display screen in a simpler and convenient way, so as to realize the under-screen fingerprint identification that meets the optical requirements.
  • FIG. 2 is a schematic diagram of a typical installation method of the fingerprint identification device 20 in the electronic device 10
  • FIG. 3 is a directional view of the fingerprint identification device 20 according to an embodiment of the present application
  • FIG. 4 is the electronic device shown in FIG.
  • FIG. 5 is a schematic diagram of the middle frame structure applied by the fingerprint identification device according to the embodiment of the application
  • FIG. 6 is a directional view of the support plate in the fingerprint identification device
  • the fingerprint identification device 20 can be arranged under the display screen 310 of the electronic device 10, for example, can be arranged under the middle area or the lower middle area of the display screen 310, which conforms to the user's use Used to make it easy for users to hold.
  • the fingerprint identification device 20 may be arranged below the display screen 310 of the electronic device 10 and above the battery 30.
  • the display screen 310 may be the display screen 120 shown in FIG. 1.
  • the fingerprint recognition device 20 is separated from the display screen 310.
  • the fingerprint recognition device 20 may be in contact with the lower surface of the display screen 310, or may not be in contact with the lower surface of the display screen 310.
  • the distance between the fingerprint identification device and the lower surface of the display screen may be less than a certain threshold, such as 600 ⁇ m, so as to ensure that sufficient light signals are incident on the photosensitive area of the fingerprint sensor chip. If the fingerprint identification device 20 and the lower surface of the display screen 310 are not in contact, a fixed gap remains between the two.
  • the gap can be an air gap without filling any auxiliary materials, which can ensure When the display screen 310 is pressed or the electronic device falls or collides, it will not appear that the fingerprint identification device 20 touches the lower surface of the display screen 310, and the biometric identification stability of the fingerprint identification device 20 will not be affected. Sex and performance.
  • the fingerprint identification device 20 may include:
  • a supporting board 200 the edge of the supporting board 200 has an upwardly tilted buckle structure 203, the buckle structure 203 is used to be installed in the slot of the middle frame 330 of the electronic device;
  • At least one fingerprint sensor chip 220 is arranged above the support plate 200 and is arranged below the display screen 310 through the support plate 200;
  • the at least one fingerprint sensor chip 220 is used to receive a fingerprint detection signal returned by reflection or scattering of a human finger above the display screen 310, and the fingerprint detection signal is used to detect fingerprint information of the finger.
  • the fingerprint sensor chip 220 may include a light detecting part and an optical component, which respectively correspond to the light detecting part 134 and the optical component 132 described above.
  • the fingerprint sensor chip 220 may include a light detecting part and an optical component, which respectively correspond to the light detecting part 134 and the optical component 132 described above.
  • the support plate 200 can be made of various materials that are not easily deformed.
  • the support plate 200 can be made of metal, alloy, or plastic, as long as its shape is fixed.
  • the supporting and fixing functions are sufficient, which is not limited in the embodiment of the present application.
  • the buckle structure may be, for example, a right-angled L-shape or a rounded L-shape
  • the groove may be a corresponding groove structure for accommodating the buckle structure
  • the fingerprint identification device 20 can be directly fixedly connected to the card slot of the middle frame 330 of the electronic device through the buckle structure 203 on the support plate 200, instead of being directly fixed to the display screen 310 or
  • the integration of the fingerprint identification device 20 and the display screen 310 is easy to implement and has low requirements on the processing technology.
  • the fingerprint identification device 20 and the display screen 310 are designed separately, which can reduce the difficulty of disassembling the fingerprint identification device 20 when the fingerprint identification device is directly fixed to the display screen, thereby improving the electronics Maintainability of equipment. Further, the complexity of installing the fingerprint identification device 20 under the display screen 310 during the production process of the fingerprint identification device can be reduced, and the yield of the fingerprint identification device can be improved, thereby reducing the production cost. In addition, the stability and performance of fingerprint recognition by the fingerprint recognition device 20 will not be affected.
  • a light-transmitting opening is provided on the middle frame 330, and the light-transmitting opening is used to reflect the human finger above the display screen. Or the scattered and returned fingerprint detection signal is transmitted to at least one fingerprint sensor chip of the fingerprint identification device.
  • the light-transmitting opening is opened in the middle area or lower middle area of the middle frame 330, so that the fingerprint detection area of the at least one fingerprint sensor chip 220 is located in the middle of the display area of the display screen 310 The position or the lower middle position is convenient for the user to hold for fingerprint recognition, thereby enhancing the user experience.
  • the size of the light-transmitting opening may be set to be larger than the size of the at least one fingerprint sensor chip 220, so that the at least one fingerprint sensor chip 220 can be removed from the upper surface of the middle frame 330 through the light-transmitting opening. Exposed to receive the fingerprint detection signal.
  • the light-transmitting opening on the middle frame is rectangular, and a card slot is provided at the edge position of the light-transmitting opening, for example, on three sides (for example, (Two short sides and one long side) are provided with communicating grooves, and the communicating grooves are used to arrange the buckle structure in the groove, and further pass through the groove and the buckle structure In cooperation with each other, the fingerprint identification device 20 is fixed to the middle frame.
  • the thickness of the card slot can be set to be greater than or equal to the thickness of the buckle structure, and the thickness of the card slot is less than a specific threshold, so that the remaining thickness of the middle frame can support the ⁇ Fingerprint identification device.
  • the buckle structure 203 includes at least one buckle 203 (as shown in FIG. 6), and the upper surface of the middle frame 330 is provided with at least one first groove 333 ( 4 and 5), wherein the at least one buckle 203 is used to be installed in the at least one first card slot 333, and the at least one buckle 203 and the at least one first card
  • the slots 333 correspond one to one.
  • the multiple buckles 203 may be discretely arranged, that is, there are intervals between adjacent buckles 203, correspondingly
  • the at least one first card slot 333 can also be multiple, and the multiple first card slots 333 can be discretely arranged, that is, there are intervals between adjacent first card slots 333, or in other words, adjacent The first card slot is not connected.
  • the light-transmitting opening on the middle frame is rectangular, and the at least one first slot 333 may be provided at an edge position of the light-transmitting opening, for example, the at least one A card slot 333 can be provided at the edge position corresponding to the two short sides and one long side of the light-transmitting opening.
  • the at least one first snap 333 can be provided at the two short sides of the support plate 200. The edge position corresponding to a long side.
  • the fingerprint identification device by installing at least one buckle on the support plate in at least one first slot of the middle frame, the fingerprint identification device can be fixed to the middle frame, which is easy to implement and easy to disassemble.
  • the edge position of the support plate is further formed with an edge connection portion 202 (as shown in FIGS. 4 and 6) along the horizontal direction, and the lower surface of the middle frame is provided with The second slot 333 (as shown in FIG. 4 and FIG. 5 ), the edge connection portion 202 is used to be installed in the second slot 332.
  • the size of the support plate 200 can be set to be larger than the size of the light-transmitting opening to form an edge connection portion 202 at the edge of the support plate. Further, the edge connection portion 202 can be installed on the lower surface of the middle frame. The second card slot 333.
  • the edge connecting portion is a plurality of edge connecting portions 202
  • the second card slot is a plurality of second card slots 332
  • the plurality of edge connecting portions 202 are connected to the
  • the two second card slots 333 have a one-to-one correspondence, and each edge connecting portion is used to be installed in the corresponding second card slot.
  • the plurality of edge connecting portions 202 are discretely arranged, that is, there are intervals between adjacent edge connecting portions 202.
  • the plurality of second card slots 332 are also discretely arranged, that is, adjacent to each other. There is an interval between the second card slots 332 of, or in other words, the adjacent second card slots are not connected.
  • the light-transmitting opening on the middle frame is rectangular, and the at least one second slot 332 is provided at an edge position of the light-transmitting opening, for example, the at least one second The card slots 332 may be provided at the edge positions corresponding to the two short sides and one long side of the light-transmitting opening.
  • the plurality of edge connecting parts 202 may be provided on the two short sides and the two short sides of the supporting plate 200. The edge position corresponding to a long side.
  • the at least one buckle 203 and the plurality of edge connection portions 202 are alternately arranged at the edge position of the support plate 200.
  • the first card slot 333 and the second card slot 332 can also be alternately provided with the edge positions of the light-transmitting opening.
  • the first card slot and the second card slot can be alternately provided on the upper surface and the lower surface of the middle frame. Therefore, it is possible to avoid the problem that the first slot and the second slot are provided in the same direction of the middle frame at the same time, causing the middle frame to have too thin thickness and insufficient supporting force.
  • the at least one buckle 203 and the plurality of edge connecting portions 202 are alternately arranged on two short sides and one long side of the support plate 200 The corresponding edge position.
  • the at least one first card slot 333 and the plurality of second card slots 332 are alternately arranged on the edge positions corresponding to the two short sides and one long side of the transparent opening .
  • a recess 205 is provided between the buckle 203 and the edge connecting portion 203 from the side surface of the support plate inward for The buckle structure and the buckle of the card slot provide assembly space.
  • the buckle structure of the support plate can be inserted into the slot of the middle frame from the side to buckle, or the support plate can also be buckled Insert it into the card slot, and force the last buckle into the card slot.
  • the thickness of the middle frame is at least 0.35mm, usually between 0.35mm and 0.68mm.
  • the thickness of the support plate can be set between 0.15mm and 0.20mm, so that On the upper surface and the lower surface of the edge of the light-transmitting opening, only a part of the thickness of the middle frame needs to be cut to form the first slot and the second slot, while still retaining a middle frame of sufficient thickness to The fingerprint identification device 20 is supported.
  • the surface roughness of the support plate may be set to be greater than 0.25 ⁇ m.
  • the surface roughness of the support plate may be greater than 0.25 ⁇ m.
  • the at least one fingerprint sensor chip 220 may be a single optical fingerprint sensor chip, or may also include multiple optical fingerprint sensor chips, for example, as shown in FIG.
  • the fingerprint identification device 20 further includes:
  • the flexible reinforcing plate 210 is disposed on the lower surface of the at least one fingerprint sensor chip 220, and the at least one fingerprint sensor chip 220 is disposed above the supporting plate through the flexible reinforcing plate 210.
  • each fingerprint sensor chip 220 can be attached to the upper surface of the flexible reinforcing plate 210 through a chip fixing glue 211, for example, the chip fixing glue 211 can be double-sided tape or glue.
  • the flexible reinforcing plate 210 has a certain degree of flexibility.
  • the flexible reinforcing plate 210 is arranged on the lower surface of the fingerprint sensor chip. In this way, when the module is assembled, it is easy to bend while keeping the fingerprint sensor chip assembly relatively independent. Not affected.
  • the at least one fingerprint sensor chip 220 includes a plurality of optical fingerprint sensor chips, on the flexible reinforcing plate along a specific edge direction A first positioning hole 218 is provided, and the first positioning hole 218 corresponds to the spaced area between adjacent optical fingerprint sensor chips among the plurality of optical fingerprint sensor chips.
  • the number of the first positioning holes 218 may be determined according to the number of fingerprint sensor chips.
  • the direction of the specific side may be the arrangement direction of the multiple optical fingerprint sensor chips.
  • the shape of the opening of the first positioning hole is an oblong or elliptical shape.
  • the shape of the opening of the first positioning hole is different from the cross-sectional shape of the positioning post on the assembly jig used to assemble the fingerprint identification device, so as to reduce the difficulty of installation.
  • the shape of the opening of the first positioning hole is an oblong or oval shape
  • the cross-sectional shape of the positioning post on the assembly jig is a circle.
  • a second positioning hole 204 is provided on the support plate 200, and the second positioning hole corresponds to the phase of the plurality of optical fingerprint sensor chips.
  • the number and shape of the second positioning holes 204 can refer to the design of the first positioning block, which will not be repeated here.
  • the first positioning hole is a plurality of first positioning holes
  • the second positioning hole is a plurality of second positioning holes
  • the plurality of first positioning holes and the plurality of The second positioning holes correspond one to one.
  • the plurality of first positioning holes and the plurality of second positioning holes are used to cooperate with the positioning posts on the assembly jig to realize the assembly of the various structural parts in the fingerprint identification device.
  • the fingerprint identification device 20 further includes:
  • At least one foam 250 is arranged between the flexible reinforcing plate 210 and the support plate 200, and the at least one foam corresponds to the at least one fingerprint sensor chip one by one.
  • the at least one foam 250 is used to control the distance between the fingerprint identification device and the display screen, specifically used to control the distance between the at least one fingerprint sensor chip 220 and the bottom of the display screen 310.
  • the thickness of the flexible reinforcing plate 210 can be set to be between 0.075 mm and 0.15 mm, so that the flexible reinforcing plate 210 has a certain supporting effect while not being Increase the thickness of the fingerprint identification device.
  • the surface roughness of the flexible reinforcing plate 210 is greater than 0.25 ⁇ m.
  • the surface roughness of the flexible reinforcing plate 210 is greater than 0.25 ⁇ m, it is possible to prevent the self-luminescence of the OLED display from reflecting in the cavity of the fingerprint identification device, and the surface with a certain roughness can scatter the light signal, thereby achieving The purpose of extinction is to prevent light reflection from affecting imaging.
  • the flexible reinforcing plate 210 is black, or other non-reflective colors, such as gun colors. By setting the flexible reinforcing plate 210 to a non-reflective color, Prevent the light signal reflected from the surface of the flexible reinforcing plate from entering the sensor chip and affecting the fingerprint detection performance.
  • the fingerprint identification device 20 further includes:
  • the filter 230 is arranged on the upper surface of at least one fingerprint sensor chip 220.
  • FIG. 4 only uses the filter 230 provided on the upper surface of the at least one fingerprint sensor chip 220 as an example, but the present application is not limited to this.
  • the filter 230 may be provided with a fingerprint sensor chip 220
  • the interior, for example, is provided on the surface of the optical component.
  • the reflectance of the light entrance surface of the filter 230 is lower than a first threshold, for example, 1%, so as to ensure that sufficient light signals are incident on the fingerprint sensor chip 220, thereby enabling Improve fingerprint recognition rate.
  • the light entrance surface of the filter can be treated with an optical inorganic coating, or an organic blackening layer can be coated to reduce the reflectivity of the light entrance surface of the filter.
  • the filter 230 in order to reduce the impact on the amount of light entering the fingerprint sensor chip 220, the filter 230 may be fixedly connected to the non-sensitive sensor chip 220 of the fingerprint sensor chip 220 through the glue dispensing structure 213 area.
  • the filter 230 may include one or more optical filters, and the one or more optical filters may be configured as, for example, band-pass filters to allow the transmission of light emitted by the OLED pixels while blocking sunlight. Infrared light and other light components. When the fingerprint identification device is used outdoors, this optical filter can effectively reduce the background light caused by sunlight.
  • the one or more optical filters may be realized, for example, as an optical filter coating formed on one or more continuous interfaces, or may be realized as one or more discrete interfaces. It should be understood that the filter 230 may be fabricated on the surface of any optical component, or along the optical path of the reflected light formed by the reflection of the finger to the sensor chip 220.
  • the filter 230 is used to reduce undesired background light in fingerprint sensing, so as to improve the optical sensing of the fingerprint sensor chip 220 to the received light.
  • the filter 230 may be specifically used to filter out the wavelength of ambient light, for example, near-infrared light and part of red light. For example, a human finger absorbs most of the energy of light with a wavelength below ⁇ 580nm. If the one or more optical filters or optical filter layers are designed to filter light with a wavelength from 580nm to infrared, the ambient light can be greatly reduced Impact on optical detection in fingerprint sensing.
  • the fingerprint identification device may also include a circuit board for transmitting signals (such as the fingerprint detection signal described above), for example, as shown in FIG. 3 and FIG.
  • the circuit board may be a flexible printed circuit (Flexible Printed Circuit, FPC) 240.
  • FPC Flexible Printed Circuit
  • At least part of the FPC 240 may be fixedly connected to an edge position on one side of the upper surface of the flexible circuit board 210 through a double-sided adhesive 214.
  • the fingerprint sensor chip 220 can be connected to the FPC 240 through a gold wire 241, and the FPC 240 is used to realize electrical properties with other peripheral circuits or other components in the electronic device as shown in FIG. 1 or FIG. Interconnection and signal transmission.
  • the fingerprint sensor chip 220 may receive the control signal of the processing unit of the electronic device through the FPC 240, and may also output a fingerprint detection signal (such as a fingerprint image) to the electronic device through the FPC 240. Processing unit or control unit, etc.
  • the arc height or package height of the gold wire 241 used to connect the FPC 240 and the fingerprint sensor chip 220 may be designed to be lower than or parallel to the filter.
  • the light entrance surface of 230 prevents the gold wire 241 from increasing the packaging height (or thickness) of the fingerprint identification device.
  • the at least one fingerprint sensor chip is a plurality of optical fingerprint sensor chips, as shown in FIG. 7, the plurality of optical fingerprint sensor chips are close to the circuit board.
  • At least one bending groove 242 is provided at one end of the at least one bending groove, and one of the at least one bending groove corresponds to the space area between adjacent optical fingerprint sensor chips.
  • the shape of the bending groove 242 is U-shaped to prevent the circuit board from breaking at the position of the bending groove.
  • the circuit board is a T-shaped flexible circuit board, and a plurality of capacitors 260 are arranged above the T-shaped flexible circuit board.
  • the capacitors are respectively connected to the at least one fingerprint sensor chip 220, and are used to filter the optical signal received by the at least one fingerprint sensor chip 220 to obtain the fingerprint detection signal.
  • the height of the capacitor is relatively high.
  • the middle frame 330 can be slotted at the corresponding position of the capacitor 260, such as the slot 334 shown in FIG. 5, so that the capacitor 260 can be removed from the middle frame 330.
  • the upper surface is exposed, or a accommodating groove may be provided on the bottom surface of the middle frame 330, and then the capacitor 260 may be disposed in the accommodating groove. In this case, the capacitor may not be exposed from the upper surface of the middle frame 330.
  • the fingerprint identification device may further include an image processor 270, for example, a microprocessor (Micro Processing Unit, MCU), and the image processor 270 is used for Receive a fingerprint detection signal (such as a fingerprint image) sent from the FPC 240, and perform fingerprint recognition based on the fingerprint detection signal.
  • an image processor 270 for example, a microprocessor (Micro Processing Unit, MCU)
  • MCU Micro Processing Unit
  • the position of the image processor 270 shown in FIGS. 3 and 4 is only an example.
  • the image processor 270 may also be arranged in other positions in the fingerprint identification device 20, as long as it can be connected to the sensor chip through the FPC 240. 220 connection is fine.
  • the at least one fingerprint sensor chip 220 may be connected to the flexible reinforcement board in a bonding manner.
  • the at least one fingerprint sensor chip 220 may be fixedly connected to the flexible reinforcement board through a chip fixing glue 211 Flexible reinforcement board.
  • a display auxiliary layer 320 is further provided below the display screen 310.
  • the display auxiliary layer 320 includes but is not limited to a light shielding layer, a heat dissipation layer, and a buffer layer.
  • the light-shielding layer is used to shield other areas outside the fingerprint detection area to prevent light signals in the other areas from entering the sensor chip and affecting the fingerprint detection effect.
  • the heat dissipation layer can be used for heat dissipation of the light-emitting unit in the display screen.
  • the layer can be used to buffer the damage to the display screen when the electronic device is crushed or impacted.
  • the middle frame 330 is a frame of an electronic device that is arranged between the display screen 310 and the battery 30 to carry various internal components.
  • the internal components include but are not limited to the motherboard, Cameras, cables, various sensors, microphones, earpieces and other parts.
  • the middle frame 330 may be made of metal or alloy material, or may also be made of plastic material, which is not limited in the embodiment of the present application.
  • the embodiment of the present application also provides an electronic device, which may include a display screen; as the fingerprint identification device in the various embodiments of the present application described above; the middle frame is provided with a card slot for identifying the fingerprint
  • the buckle structure on the support plate of the device is arranged in the groove, wherein the fingerprint identification device is arranged under the display screen through the middle frame to perform under-screen fingerprint detection.
  • the display screen may correspond to the display screen 310 in the foregoing embodiment.
  • details are not repeated here.
  • middle frame may correspond to the middle frame 330 in the foregoing embodiment.
  • details are not described herein again.
  • a light-transmitting opening is provided on the middle frame, and the light-transmitting opening is used to detect the fingerprint returned by the reflection or scattering of the human finger above the display screen.
  • the signal is transmitted to at least one fingerprint sensor chip of the fingerprint identification device.
  • At least one first slot is provided at the edge position of the light-transmitting opening on the upper surface of the middle frame, and the buckle structure includes at least one buckle, wherein, The at least one buckle is used to be installed in the at least one first buckle, and the at least one buckle corresponds to the at least one first buckle one-to-one.
  • the edge position of the light-transmitting opening of the lower surface of the middle frame is provided with a second slot, and the edge position of the support plate is also formed with an edge connection in the horizontal direction. Part, the edge connecting part is used to be installed in the second slot.
  • the edge connection portion is a plurality of edge connection portions
  • the second card slot is a plurality of second card slots
  • the plurality of edge connection portions are used for mounting to the In the plurality of second card slots
  • the plurality of edge connection parts correspond to the plurality of second card slots one to one.
  • the at least one first card slot and the plurality of second card slots are alternately arranged at the edge position of the light-transmitting opening.
  • the light-transmitting opening is rectangular, and the at least one first card slot and the plurality of second card slots are alternately arranged on two short sides of the light-transmitting opening And the corresponding edge position on a long side.
  • the light-transmitting opening is arranged in the middle area or the lower middle area of the middle frame, so that the fingerprint detection area of the at least one fingerprint sensor chip is located on the display screen.
  • the middle or lower middle position of the display area is arranged in the middle area or the lower middle area of the middle frame, so that the fingerprint detection area of the at least one fingerprint sensor chip is located on the display screen.
  • an opening is further provided on the middle frame at a position close to the circuit board of the fingerprint identification device, so that a plurality of capacitors arranged on the circuit board can be removed from the middle frame.
  • the upper surface is exposed.
  • the fingerprint identification device is in contact with the lower surface of the light-emitting unit in the middle area of the display screen of the electronic device; or the fingerprint identification device is in contact with the middle area of the display screen
  • the lower surface of the light emitting unit is not in contact, and the distance between the upper surface of the fingerprint sensor chip and the lower surface of the display screen is less than a third threshold.
  • the third threshold value is 600 ⁇ m.
  • a display auxiliary layer 320 is further provided under the display screen, where the display auxiliary layer 320 may include a light shielding layer, a heat dissipation layer, a buffer layer, and the like.
  • the support plate 200 with the foam is placed on the assembly device through the second positioning hole, and then the fingerprint module is fixed on the positioning post on the assembly device through the first positioning hole of the flexible reinforcing plate , By applying a certain pressure to the fingerprint module, the support plate 200 and the fingerprint module are fixedly connected to obtain the fingerprint identification device 20;
  • a middle frame 330 wherein the middle frame 330 is provided with various openings or slots for accommodating the structural components of the fingerprint identification device 20, such as the first card slot and the second card slot described above And the slot used to house the capacitor.
  • the fingerprint identification device 20 is assembled from the side of the middle frame 330, so that the buckle structure at the edge of the support plate 200 engages with the first slot on the middle frame, and the edge connection part engages with the second slot
  • the buckle structure at the edge of the support plate 200 engages with the first slot on the middle frame
  • the edge connection part engages with the second slot
  • a display screen auxiliary layer 320 and a display screen 310 may be sequentially arranged above the middle frame 330, so that the fingerprint identification device 20 can be installed under the display screen 310 of the electronic device.
  • the under-screen fingerprint assembly scheme of the embodiment of the present application only a certain number of buckles are provided on the support plate of the fingerprint identification device, and a certain number and size of card slots are provided in the middle frame, so that the support plate can be passed through
  • the buckle structure fixes the fingerprint identification device in the card slot of the middle frame, and further arranges the fingerprint identification device 20 under the display screen 310 to realize the optical fingerprint identification under the screen.
  • the units can be implemented by electronic hardware, computer software or a combination of the two, in order to clearly illustrate the interchangeability of hardware and software.
  • the composition and steps of each example have been described generally in terms of function. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
  • the disclosed system and device may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, devices, or units, and may also be electrical, mechanical, or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or software function unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a
  • the storage medium includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

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Abstract

一种指纹识别装置和电子设备，应用在具有显示屏的电子设备，所述指纹识别装置包括：支撑板，所述支撑板的边缘位置具有向上翘起的卡扣结构，所述卡扣结构用于安装到所述电子设备的中框的卡槽内；至少一个指纹传感器芯片，设置在所述支撑板的上方，并通过所述支撑板设置在所述显示屏的下方；其中，所述至少一个指纹传感器芯片用于接收经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号，所述指纹检测信号用来检测所述手指的指纹信息。

Description

指纹识别装置和电子设备 技术领域
本申请实施例涉及指纹识别技术领域，并且更具体地，涉及指纹识别装置和电子设备。
背景技术
随着终端行业的高速发展，指纹识别技术越来越受到人们重视，更加便捷的屏下指纹识别技术的实用化已成为大众所需。
目前，屏下指纹识别技术主要有两种实现方式，一种实现方式是将光学指纹识别模组贴在OLED显示屏下，此实现方式工序复杂，难度较大，且容易损伤OLED显示屏；另一种实现方式是将显示屏和指纹识别模组制备在一起，这在量产过程中对于整个光学指纹识别模组的精度要求非常高，一般的加工工艺满基本足不了实际需求。
因此，如何实现工艺简单便捷的屏下指纹识别技术，成为一个亟待解决的技术问题。
发明内容
提供了一种指纹识别装置和电子设备，能够实现工艺简单便捷的屏下指纹识别。
第一方面，提供了一种指纹识别装置，应用在具有显示屏的电子设备，所述指纹识别装置包括：
支撑板，所述支撑板的边缘位置具有向上翘起的卡扣结构，所述卡扣结构用于安装到所述电子设备的中框的卡槽内；
至少一个指纹传感器芯片，设置在所述支撑板的上方，并通过所述支撑板设置在所述显示屏的下方；
其中，所述至少一个指纹传感器芯片用于接收经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号，所述指纹检测信号用来检测所述手指的指纹信息。
在一种可能的实现方式中，所述卡扣结构包括至少一个卡扣，所述中框的上表面设置有至少一个第一卡槽，其中，所述至少一个卡扣用于安装到所 述至少一个第一卡槽中，且所述至少一个卡扣与所述至少一个第一卡槽一一对应。
在一种可能的实现方式中，所述支撑板的边缘位置的水平方向上还形成有边缘连接部，所述中框的下表面设置有第二卡槽，所述边缘连接部用于安装在所述第二卡槽中。
在一种可能的实现方式中，所述边缘连接部为多个边缘连接部，所述第二卡槽为多个第二卡槽，所述多个边缘连接部用于安装到所述多个第二卡槽中，且所述多个边缘连接部与所述多个第二卡槽一一对应。
在一种可能的实现方式中，所述至少一个卡扣和所述多个边缘连接部交替设置在所述支撑板的边缘位置。
在一种可能的实现方式中，所述支撑板为矩形，所述至少一个卡扣和所述多个边缘连接部交替设置在所述支撑板的两条短边和一条长边上。
在一种可能的实现方式中，在所述卡扣和所述边缘连接部之间设置有从所述支撑板的侧面向内的凹陷部。
在一种可能的实现方式中，所述卡扣为直角L型或圆角L型。
在一种可能的实现方式中，所述指纹识别装置还包括：
电路板，所述电路板的至少部分连接在所述支撑板的上表面一侧的边缘位置，所述电路板和所述至少一个指纹传感器芯片连接。
在一种可能的实现方式中，所述电路板的至少部分连接在所述支撑板的上表面上远离所述卡扣结构的一侧的边缘位置。
在一种可能的实现方式中，当所述至少一个指纹传感器芯片为多个光学指纹传感器芯片时，在所述电路板上靠近所述多个光学指纹传感器芯片的一端设置有至少一个折弯槽，所述至少一个折弯槽中的一个折弯槽对应相邻的光学指纹传感器芯片之间的间隔区域。
在一种可能的实现方式中，所述折弯槽为U型槽。
在一种可能的实现方式中，所述电路板为T型软性电路板，所述T型软性电路板的上方设置有多个电容器，所述多个电容器分别对应连接到所述至少一个指纹传感器芯片。
在一种可能的实现方式中，所述指纹识别装置还包括：
滤光片，设置在所述至少一个指纹传感器芯片的上表面，其中，所述滤光片的进光面的反射率低于第一阈值。
在一种可能的实现方式中，通过对滤光片的进光面进行光学无机镀膜处理，或者涂覆有机黑化图层以使所述滤光片的进光面的反射率低于第一阈值。
在一种可能的实现方式中，所述滤光片通过点胶方式固定连接于所述至少一个指纹传感器芯片的非感应区域。
在一种可能的实现方式中，所述滤光片和所述至少一个指纹传感器芯片之间为空气间隙，或所述滤光片和所述至少一个指纹传感器芯片之间通过胶水填充，其中，所述胶水的折射率低于第二阈值。
在一种可能的实现方式中，所述电路板通过金线与所述至少一个指纹传感器芯片连接，其中，所述金线的弧高或封装高度低于或平行于所述滤光片的进光面。
在一种可能的实现方式中，所述指纹识别装置还包括：
挠性补强板，设置在所述至少一个指纹传感器芯片的下表面，所述至少一个指纹传感器芯片通过所述挠性补强板设置在所述支撑板的上方。
在一种可能的实现方式中，若所述至少一个指纹传感器芯片包括多个光学指纹传感器芯片，在所述挠性补强板上沿特定边的方向上设置有第一定位孔，所述第一定位孔对应所述多个光学指纹传感器芯片中的相邻光学指纹传感器芯片的间隔区域。
在一种可能的实现方式中，所述第一定位孔的孔口形状为长圆形或者椭圆形。
在一种可能的实现方式中，所述支撑板上设置有第二定位孔，所述第二定位孔对应所述多个光学指纹传感器芯片中的相邻光学指纹传感器芯片的间隔区域。
在一种可能的实现方式中，所述第二定位孔的孔口形状为长圆形或者椭圆形。
在一种可能的实现方式中，所述第一定位孔为多个，所述第二定位孔为多个，多个所述第一定位孔和多个所述第二定位孔一一对应。
在一种可能的实现方式中，所述挠性补强板的厚度在0.075mm至0.15mm之间。
在一种可能的实现方式中，所述挠性补强板的表面粗糙度大于0.25μm。
在一种可能的实现方式中，所述电子设备还包括：
至少一个泡棉，设置于所述挠性补强板和所述支撑板之间，所述至少一个泡棉与所述至少一个指纹传感器芯片一一对应。
在一种可能的实现方式中，所述支撑板为金属材质，所述支撑板的厚度在0.15mm至0.20mm之间。
在一种可能的实现方式中，所述支撑板的表面粗糙度大于0.25μm。
在一种可能的实现方式中，所述指纹识别装置与所述电子设备的显示屏的中间区域中间偏下区域的发光单元的下表面接触；或所述指纹识别装置与所述显示屏的中间区域中间偏下区域的发光单元的下表面不接触，且所述指纹传感器芯片的上表面和所述显示屏的下表面的距离小于第三阈值。
在一种可能的实现方式中，所述挠性补强板为PI材质。
在一种可能的实现方式中，所述挠性补强板为黑色，或者也可以为不反光的其他颜色，例如枪色，将挠性补强板设置为不反光的颜色，能够防止从挠性补强板表面反射的光信号进入到传感器芯片，影响指纹检测性能。
第二方面，提供了一种电子设备，包括：
显示屏；
如第一方面或第一方面的任一可能的实现方式中的指纹识别装置；
中框，设置有卡槽，用于将所述指纹识别装置中的支撑板上的卡扣结构设置在所述凹槽中，其中所述指纹识别装置通过所述中框设置在所述显示屏的下方以进行屏下指纹检测。
在一种可能的实现方式中，所述中框上设置有透光开口，所述透光开口用于将所述经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号透射到所述指纹识别装置的至少一个指纹传感器芯片。
在一种可能的实现方式中，在所述中框的上表面所述透光开口的边缘位置设置有至少一个第一卡槽，所述卡扣结构包括至少一个卡扣，其中，所述至少一个卡扣用于安装到所述至少一个第一卡槽中，且所述至少一个卡扣与所述至少一个第一卡槽一一对应。
在一种可能的实现方式中，所述中框的下表面所述透光开口的边缘位置设置有第二卡槽，所述支撑板的边缘位置的水平方向上还形成有边缘连接部，所述边缘连接部用于安装在所述第二卡槽中。
在一种可能的实现方式中，所述边缘连接部为多个边缘连接部，所述第二卡槽为多个第二卡槽，所述多个边缘连接部用于安装到所述多个第二卡槽 中，且所述多个边缘连接部与所述多个第二卡槽一一对应。
在一种可能的实现方式中，所述至少一个第一卡槽和所述多个第二卡槽交替设置在所述透光开口的边缘位置。
在一种可能的实现方式中，所述透光开口为矩形，所述至少一个第一卡槽和所述多个第二卡槽交替设置在所述透光开口的两条短边和一条长边上对应的边缘位置。
在一种可能的实现方式中，所述透光开口设置在所述中框的中间区域或中间偏下区域，以使所述至少一个指纹传感器芯片的指纹检测区域位于所述显示屏的显示区域的中间位置或者中间偏下位置。
在一种可能的实现方式中，所述中框上靠近所述指纹识别装置的电路板的位置上还设置有开孔，以使所述电路板上设置的多个电容器从中框的上表面露出。
在一种可能的实现方式中，所述指纹识别装置与所述电子设备的显示屏的中间区域或中间偏下区域的发光单元的下表面接触；或所述指纹识别装置与所述显示屏的中间区域或中间偏下区域的发光单元的下表面不接触，且所述指纹传感器芯片的上表面和所述显示屏的下表面的距离小于第三阈值。
在一种可能的实现方式中，所述第三阈值为600μm。
基于上述技术方案，该指纹识别装置可以通过支撑板上的卡扣结构直接固定连接到电子设备的中框的卡槽中，而不必直接固定到显示屏上或者将指纹识别装置和显示屏一体化，便于实现，且对加工工艺的要求较低，易于实现简单便捷的屏下指纹识别。
附图说明
图1A是根据本申请一实施例的电子设备的定向视图。
图1B是图1A所示的电子设备沿A-A’的部分剖面结构示意图。
图2是根据本申请实施例的指纹识别装置的一种典型的安装位置的示意性图。
图3为根据本申请实施例的指纹识别装置的定向视图。
图4是图2所示的电子设备沿A-A’的部分剖面结构示意图。
图5是根据本申请实施例的中框结构的示意图。
图6是根据本申请实施例的支撑板的定向视图。
图7是根据本申请实施例的指纹识别装置的局部视图。
图8是根据本申请实施例的指纹识别装置的装配示意图。
具体实施方式
下面将结合附图，对本发明实施例中的技术方案进行描述。
作为一种常见的应用场景，本申请实施例提供的光学指纹系统可以应用在智能手机、平板电脑以及其他具有显示屏的移动终端或者其他终端设备；更具体地，在上述终端设备中，指纹识别装置可以具体为光学指纹装置，其可以设置在显示屏下方的局部区域或者全部区域，从而形成屏下(Under-display)光学指纹系统。
图1A和图1B示出了本申请实施例可以适用的电子设备的示意图，其中，图1为电子设备10的正面示意图，图1B为图1A所示的电子设备10沿A’-A’的部分剖面结构示意图。
如图1A和图1B所示，所述电子设备10包括显示屏120和光学指纹装置130，其中，所述光学指纹装置130设置在所述显示屏120下方的局部区域，例如，显示屏中间区域的下方。所述光学指纹装置130包括光学指纹传感器，所述光学指纹传感器包括具有多个光学感应单元的感应阵列，所述感应阵列所在区域或者其感应区域为所述光学指纹装置130的指纹检测区域103。如图1A所示，所述指纹检测区域103位于所述显示屏120的显示区域之中。
应当理解，所述指纹检测区域103的面积可以与所述光学指纹装置130的感应阵列的面积不同，例如通过例如透镜成像的光路设计、反射式折叠光路设计或者其他光线汇聚或者反射等光路设计，可以使得所述光学指纹装置130的指纹检测区域103的面积大于所述光学指纹装置130感应阵列的面积。在其他替代实现方式中，如果采用例如光线准直方式进行光路引导，所述光学指纹装置130的指纹检测区域103也可以设计成与所述光学指纹装置130的感应阵列的面积基本一致。
因此，使用者在需要对所述终端设备进行解锁或者其他指纹验证的时候，只需要将手指按压在位于所述显示屏120的指纹检测区域103，便可以实现指纹输入。由于指纹检测可以在屏内实现，因此采用上述结构的电子设备10无需其正面专门预留空间来设置指纹按键(比如Home键)，从而可以 采用全面屏方案，即所述显示屏120的显示区域可以基本扩展到整个电子设备10的正面。
作为一种可选的实现方式，如图1A所示，所述光学指纹装置130包括光检测部分134和光学组件132，所述光检测部分134包括所述感应阵列以及与所述感应阵列电性连接的读取电路及其他辅助电路，其可以在通过半导体工艺制作在一个芯片(Die)，比如光学成像芯片或者光学指纹传感器，所述感应阵列具体为光探测器(Photo detector)阵列，其包括多个呈阵列式分布的光探测器，所述光探测器可以作为如上所述的光学感应单元；所述光学组件132可以设置在所述光检测部分134的感应阵列的上方，其可以具体包括滤光层(Filter)、导光层或光路引导结构以及其他光学元件，所述滤光层可以用于滤除穿透手指的环境光，例如，干扰成像的红外光，而所述导光层或光路引导结构主要用于从手指表面反射回来的反射光导引至所述感应阵列进行光学检测。
在具体实现上，所述光学组件132可以与所述光检测部分134封装在同一个光学指纹部件。比如，所述光学组件132可以与所述光学检测部分134封装在同一个光学指纹芯片，也可以将所述光学组件132设置在所述光检测部分134所在的芯片外部，比如将所述光学组件132贴合在所述芯片上方，或者将所述光学组件132的部分元件集成在上述芯片之中。
其中，所述光学组件132的导光层或者光路引导结构有多种实现方案，比如，所述导光层可以具体为在半导体硅片制作而成的准直器(Collimator)层，其具有多个准直单元或者微孔阵列，所述准直单元可以具体为小孔，从手指反射回来的反射光中，垂直入射到所述准直单元的光线可以穿过并被其下方的光学感应单元接收，而入射角度过大的光线在所述准直单元内部经过多次反射被衰减掉，因此每一个光学感应单元基本只能接收到其正上方的指纹纹路反射回来的反射光，从而所述感应阵列便可以检测出手指的指纹图像。
在另一种实施例中，所述导光层或者光路引导结构也可以为光学透镜(Lens)层，其具有一个或多个透镜单元，比如一个或多个非球面透镜组成的透镜组，其用于将从手指反射回来的反射光汇聚到其下方的光检测部分134的感应阵列，以使得所述感应阵列可以基于所述反射光进行成像，从而得到所述手指的指纹图像。可选地，所述光学透镜层在所述透镜单元的光路 中还可以形成有针孔，所述针孔可以配合所述光学透镜层扩大所述光学指纹装置的视场，以提高所述光学指纹装置130的指纹成像效果。
在其他实施例中，所述导光层或者光路引导结构也可以具体采用微透镜(Micro-Lens)层，所述微透镜层具有由多个微透镜形成的微透镜阵列，其可以通过半导体生长工艺或者其他工艺形成在所述光检测部分134的感应阵列上方，并且每一个微透镜可以分别对应于所述感应阵列的其中一个感应单元。并且，所述微透镜层和所述感应单元之间还可以形成其他光学膜层，比如介质层或者钝化层，更具体地，所述微透镜层和所述感应单元之间还可以包括具有微孔的挡光层，其中所述微孔形成在其对应的微透镜和感应单元之间，所述挡光层可以阻挡相邻微透镜和感应单元之间的光学干扰，并使得所述感应单元所对应的光线通过所述微透镜汇聚到所述微孔内部并经由所述微孔传输到所述感应单元以进行光学指纹成像。
应当理解，上述光路引导结构的几种实现方案可以单独使用也可以结合使用，比如，可以在所述准直器层或者所述光学透镜层下方进一步设置微透镜层。当然，在所述准直器层或者所述光学透镜层与所述微透镜层结合使用时，其具体叠层结构或者光路可能需要按照实际需要进行调整。
作为一种可选的实施例，所述显示屏120可以采用具有自发光显示单元的显示屏，比如有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏或者微型发光二极管(Micro-LED)显示屏。以采用OLED显示屏为例，所述光学指纹装置130可以利用所述OLED显示屏120位于所述指纹检测区域103的显示单元(即OLED光源)来作为光学指纹检测的激励光源。当手指按压在所述指纹检测区域103时，显示屏120向所述指纹检测区域103上方的目标手指发出一束光，该光在手指的表面发生反射形成反射光或者经过所述手指内部散射而形成散射光，在相关专利申请中，为便于描述，上述反射光和散射光统称为反射光。由于指纹的嵴(ridge)与峪(vally)对于光的反射能力不同，因此，来自指纹嵴的反射光和来自指纹峪的发射光具有不同的光强，反射光经过光学组件后，被光学指纹装置130中的感应阵列所接收并转换为相应的电信号，即指纹检测信号；基于所述指纹检测信号便可以获得指纹图像数据，并且可以进一步进行指纹匹配验证，从而在所述电子设备10实现光学指纹识别功能。在其他实施例中，所述光学指纹装置130也可以采用内置光源或者外置光源来提供用于进行指纹检测的光信号。
应当理解的是，在具体实现上，所述电子设备10还包括透明保护盖板，所述盖板可以为玻璃盖板或者蓝宝石盖板，其位于所述显示屏120的上方并覆盖所述电子设备10的正面。因为，本申请实施例中，所谓的手指按压在所述显示屏120实际上是指按压在所述显示屏120上方的盖板或者覆盖所述盖板的保护层表面。
另一方面，在某些实施例中，所述光学指纹装置130可以仅包括一个光学指纹传感器，此时光学指纹装置130的指纹检测区域103的面积较小且位置固定，因此用户在进行指纹输入时需要将手指按压到所述指纹检测区域103的特定位置，否则光学指纹装置130可能无法采集到指纹图像而造成用户体验不佳。在其他替代实施例中，所述光学指纹装置130可以具体包括多个光学指纹传感器；所述多个光学指纹传感器可以通过拼接方式并排设置在所述显示屏120的中间区域，且所述多个光学指纹传感器的感应区域共同构成所述光学指纹装置130的指纹检测区域103。也就是说，所述光学指纹装置130的指纹检测区域103可以包括多个子区域，每个子区域分别对应于其中一个光学指纹传感器的感应区域，从而将所述光学指纹模组130的指纹采集区域103可以扩展到所述显示屏的中间部分的主要区域，即扩展到手指惯常按压区域，从而实现盲按式指纹输入操作。可替代地，当所述光学指纹传感器数量足够时，所述指纹检测区域130还可以扩展到半个显示区域甚至整个显示区域，从而实现半屏或者全屏指纹检测。
受限于加工工艺、指纹模组的精度要求等因素，实现工艺简单便捷的屏下指纹识别方案的需求越来越紧迫。本申请提供了一种屏下指纹识别方案，可以以一种更简单且便捷的方式将指纹识别装置安装在显示屏的下方，从而实现满足光学需求的屏下指纹识别。
以下，结合图2至图7，详细说明根据本申请实施例的指纹识别装置在电子设备中的安装方式。需要说明的是，为便于说明，在本申请实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。
其中，图2为指纹识别装置20在电子设备10中的一种典型安装方式的示意图，图3是根据本申请实施例的指纹识别装置20的定向视图，图4是图2所示的电子设备沿A-A’的部分剖面结构示意图，图5是根据本申请实施例指纹识别装置所应用的中框结构的示意图，图6是指纹识别装置中的支撑 板的定向视图，图7是根据本申请实施例的指纹识别装置的部分结构的俯视图。
如图2至图4所示，该指纹识别装置20可以设置在电子设备10的显示屏310的下方，例如，可以设置在显示屏310的中间区域或中间偏下区域的下方，符合用户的使用习惯，便于用户握持。一种可选的实现方式中，该指纹识别装置20可以设置电子设备10的显示屏310的下方，电池30的上方。
应理解，在本申请实施例中，所述显示屏310可以为图1中所示的显示屏120，其相关说明可以参考可以参照前述关于显示屏120的描述，为了简洁，在此不再赘述。
在本申请实施例中，该指纹识别装置20与显示屏310是分离的，具体地，该指纹识别装置20可以与显示屏310的下表面接触，或者也可以与显示屏310的下表面不接触，例如，该指纹识别装置与显示屏的下表面的距离可以小于特定阈值，例如600μm，从而保证有足够的光信号入射到指纹传感器芯片的感光区域。若所述指纹识别装置20和所述显示屏310的下表面不接触，二者之间保留固定的间隙，所述间隙可以是不填充任何辅助材料的空气间隙(air gap)，其可保证在当显示屏310受到按压或者电子设备出现跌落或碰撞时均不会出现所述指纹识别装置20接触到所述显示屏310的下表面，也不会影响所述指纹识别装置20的生物特征识别稳定性和性能。
可选地，在本申请一个实施例中，如图3和图4所示，该指纹识别装置20可以包括：
支撑板200，所述支撑板200的边缘位置具有向上翘起的卡扣结构203，所述卡扣结构203用于安装到所述电子设备的中框330的卡槽内；
至少一个指纹传感器芯片220，设置在所述支撑板200的上方，并通过所述支撑板200设置在所述显示屏310的下方；
其中，所述至少一个指纹传感器芯片220用于接收经由所述显示屏310上方的人体手指反射或散射而返回的指纹检测信号，所述指纹检测信号用来检测所述手指的指纹信息。
应理解，在本申请实施例中，该指纹传感器芯片220可以包括光检测部分和光学组件，分别对应于前文所述的光检测部分134和光学组件132，为了简洁，这里不再赘述。
可选地，在本申请实施例中，该支撑板200可以为各种不易变形的材料， 例如，该支撑板200可以为金属材质，或者合金材质，或者也可以是塑封材质，只要其形状固定具有支撑和固定功能即可，本申请实施例对此不作限定。
可选地，在一些实施例中，所述卡扣结构可以为例如直角L型或圆角L型，所述卡槽可以为对应的凹槽结构，用于容置所述卡扣结构。
因此，在本申请实施例中，该指纹识别装置20可以通过支撑板200上的卡扣结构203直接固定连接到电子设备的中框330的卡槽中，而不必直接固定到显示屏310上或者将指纹识别装置20和显示屏310一体化，便于实现，且对加工工艺的要求较低。
并且，本申请实施例通过将所述指纹识别装置20与所述显示屏310进行分离设计，能够降低将指纹识别装置直接固定到显示屏上时拆卸所述指纹识别装置20的难度，进而提高电子设备的可维修性。进一步地，能够降低在所述指纹识别装置的生产过程中将所述指纹识别装置20安装到所述显示屏310下方的复杂度，并提高所述指纹识别装置的良率，进而降低生产成本。此外，也不会影响所述指纹识别装置20的指纹识别的稳定性和性能。
可选地，在本申请一个实施例中，如图4所示，所述中框330上设置有透光开口，所述透光开口用于将所述经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号透射到所述指纹识别装置的至少一个指纹传感器芯片。作为一个可选实施例，该透光开口开设在中框330的中间区域或中间偏下区域，以使所述至少一个指纹传感器芯片220的指纹检测区域位于所述显示屏310的显示区域的中间位置或者中间偏下位置，便于用户握持进行指纹识别，从而提升用户体验。
在一种实现方式中，可以设置所述透光开口的尺寸大于所述至少一个指纹传感器芯片220的尺寸，从而能够使得所述至少一个指纹传感器芯片220通过该透光开口从中框330的上表面露出，以接收所述指纹检测信号。
在一种可选的实现方式中，所述中框上的透光开口为矩形，在所述透光开口的边缘位置设置有卡槽，例如，在所述透光开口的三条边(例如，两条短边和一条长边)上设置连通的卡槽，所述连通的卡槽用于将所述卡扣结构设置在所述卡槽中，进一步通过所述卡槽和所述卡扣结构相互配合，将所述指纹识别装置20固定到所述中框上。
在一种可选的实现方式中，可以设置所述卡槽的厚度大于或等于所述卡扣结构的厚度，并且所述卡槽的厚度小于特定阈值，以使中框的剩余厚度能 够支撑所述指纹识别装置。
可选地，在本申请一个实施例中，所述卡扣结构203包括至少一个卡扣203(如图6所示)，所述中框330的上表面设置有至少一个第一卡槽333(如图4和图5所示)，其中，所述至少一个卡扣203用于安装到所述至少一个第一卡槽333中，且所述至少一个卡扣203与所述至少一个第一卡槽333一一对应。
可选地，在一种实现方式中，当所述至少一个卡扣203为多个时，该多个卡扣203可以是离散设置的，即相邻的卡扣203之间具有间隔，对应地，所述至少一个第一卡槽333也可以是多个，该多个第一卡槽333可以是离散设置的，即相邻的第一卡槽333之间具有间隔，或者说，相邻的第一卡槽不连通。
在一种可选的实现方式中，所述中框上的透光开口为矩形，所述至少一个第一卡槽333可以设置在所述透光开口的边缘位置，例如，所述至少一个第一卡槽333可以设置在所述透光开口的两条短边和一条长边对应的边缘位置，对应地，所述至少一个第一卡扣333可以设置在所述支撑板200的两条短边和一条长边对应的边缘位置。
因此，本申请实施例通过将支撑板上的至少一个卡扣安装在中框的至少一个第一卡槽中，能够实现将指纹识别装置固定到中框上，便于实现，且易拆卸。
可选地，在本申请一个实施例中，所述支撑板的边缘位置沿水平方向上还形成有边缘连接部202(如图4和图6所示)，所述中框的下表面设置有第二卡槽333(如图4和图5)，所述边缘连接部202用于安装在所述第二卡槽332中。
例如，可以设置支撑板200的尺寸大于所述透光开口的尺寸，以在所述支撑板的边缘位置形成边缘连接部202，进一步可以将所述边缘连接部202安装在中框下表面所设置的第二卡槽333中。
在一种可选的实现方式中，所述边缘连接部为多个边缘连接部202，所述第二卡槽为多个第二卡槽332，所述多个边缘连接部202与所述多个第二卡槽333一一对应，每个边缘连接部用于安装到对应的第二卡槽中。
应理解，所述多个边缘连接部202是离散设置的，即相邻的边缘连接部202之间具有间隔，对应地，所述多个个第二卡槽332也是离散设置的，即 相邻的第二卡槽332之间具有间隔，或者说，相邻的第二卡槽不连通。
在一种可选的实现方式中，所述中框上的透光开口为矩形，所述至少一个第二卡槽332设置在所述透光开口的边缘位置，例如，所述至少一个第二卡槽332可以设置在所述透光开口的两条短边和一条长边对应的边缘位置，对应地，所述多个边缘连接部202可以设置在所述支撑板200的两条短边和一条长边对应的边缘位置。
可选地，在本申请实施例中，所述至少一个卡扣203和所述多个边缘连接部202交替设置在所述支撑板200的边缘位置。
对应地，第一卡槽333和第二卡槽332也可以交替设置透光开口的边缘位置，具体地，可以在中框的上表面和下表面交替设置第一卡槽和第二卡槽，从而能够避免沿中框的同一方向同时设置第一卡槽和第二卡槽造成中框厚度过薄支撑力不够的问题。
在一种可选的实现方式中，如图6所示，所述至少一个卡扣203和所述多个边缘连接部202交替设置在所述支撑板200的两条短边和一条长边上对应的边缘位置。
对应地，如图5所示，所述至少一个第一卡槽333和所述多个第二卡槽332交替设置在所述透光开口的两条短边和一条长边对应的边缘位置上。
进一步地，在本申请一个实施例中，如图6所示，所述卡扣203和所述边缘连接部203之间设置有从所述支撑板的侧面向内的凹陷部205，用于为卡扣结构和卡槽的扣合提供装配空间。
综合上述结构，结合图5和图6，在卡扣结构和卡槽扣合时，可以将支撑板的卡扣结构从侧边插入中框的卡槽中进行扣合，或者也可以将支撑板插入卡槽中，将最后一个卡扣强配卡入卡槽中。
一般来说，中框的厚度至少为0.35mm，通常在0.35mm至0.68mm之间，在本申请实施例中，可以设置所述支撑板的厚度在0.15mm至0.20mm之间，这样，可以在透光开口的边缘位置的上表面和下表面，分别只需切割掉部分厚度的中框，以形成所述第一卡槽和所述第二卡槽，同时还保留足够厚度的中框以支撑该指纹识别装置20。
可选地，在本申请一个实施例中，可以设置所述支撑板的表面粗糙度大于0.25μm。通过配置支撑板的表面粗糙度大于0.25μm，能够防止OLED显示屏的自发光在指纹识别装置腔体内形成反射，并且带有一定粗糙度的表面 可以将光信号进行散射，从而达到消光的目的，进而避免光反射对成像造成影响。
可选地，在本申请实施例中，所述至少一个指纹传感器芯片220可以为单个光学指纹传感器芯片，或者也可以包括多个光学指纹传感器芯片，例如，图3所示的由4个光学指纹传感器芯片构成的光学指纹传感器阵列，当包括多个光学指纹传感器芯片时，该多个光学指纹传感器芯片可以通过拼接方式并排设置在所述显示屏310的中间区域的下方，形成一个光学指纹传感器芯片组件，所述多个光学指纹传感器芯片的感应区域共同构成所述指纹识别装置20的指纹检测区域。
可选地，在本申请一个实施例中，如图4所示，所述指纹识别装置20还包括：
挠性补强板210，设置在所述至少一个指纹传感器芯片220的下表面，所述至少一个指纹传感器芯片220通过所述挠性补强板210设置在所述支撑板的上方。
如图4所示，每个指纹传感器芯片220可以通过芯片固定胶211贴合在所述挠性补强板210的上表面，例如，所述芯片固定胶211可以为双面胶或者胶水。
其中，该挠性补强板210具有一定的柔性，将柔性补强板210设置在指纹传感器芯片的下表面，这样，进行模组组装时，便于折弯，同时能够保持指纹传感器芯片组件相对独立不受影响。
可选地，在本申请一个实施例中，如图7所示，若所述至少一个指纹传感器芯片220包括多个光学指纹传感器芯片，在所述挠性补强板上沿特定边的方向上设置有第一定位孔218，所述第一定位孔218对应所述多个光学指纹传感器芯片中的相邻光学指纹传感器芯片的间隔区域。
可选地，所述第一定位孔218的数量可以根据该指纹传感器芯片的数量确定。可选地，所述特定边的方向可以为该多个光学指纹传感器芯片的排布方向。可选地，所述第一定位孔的孔口形状为长圆形或者椭圆形。进一步地，所述第一定位孔的孔口形状与用于组装所述指纹识别装置的组装治具上的定位柱的横截面形状不相同，以降低安装难度。例如，所述第一定位孔的孔口形状为长圆形或者椭圆形，组装治具上的定位柱的横截面形状为圆形。
可选地，在本申请一个实施例中，如图6所示，所述支撑板200上设置 有第二定位孔204，所述第二定位孔对应所述多个光学指纹传感器芯片中的相邻光学指纹传感器芯片的间隔区域。
类似地，所述第二定位孔204的数量和孔口形状可以参考第一定位块的设计方式，这里不再赘述。
应理解，在本申请实施例中，若所述第一定位孔为多个第一定位孔，所述第二定位孔为多个第二定位孔，多个所述第一定位孔和多个所述第二定位孔一一对应。所述多个第一定位孔和所述多个第二定位孔都用于与组装治具上的定位柱配合，实现指纹识别装置中的各个结构件的组装。
可选地，在本申请一个实施例中，所述指纹识别装置20还包括：
至少一个泡棉250，设置于所述挠性补强板210和所述支撑板200之间，所述至少一个泡棉一一对应于所述至少一个指纹传感器芯片。
其中，所述至少一个泡棉250用于控制所述指纹识别装置和显示屏之间的距离，具体用于控制所述至少一个指纹传感器芯片220和所述显示屏310的下方之间的距离。
可选地，在本申请一个实施例中，可以设置该挠性补强板210的厚度在0.075mm至0.15mm之间，以使该挠性补强板210具有一定的支撑作用，同时不至于增加指纹识别装置的厚度。
可选地，在本申请一个实施例中，所述挠性补强板210的表面粗糙度大于0.25μm。通过配置挠性补强板210的表面粗糙度大于0.25μm，能够防止OLED显示屏的自发光在指纹识别装置腔体内形成反射，并且带有一定粗糙度的表面可以将光信号进行散射，从而达到消光的目的，进而避免光反射对成像造成影响。
可选地，在本申请一个实施例中，所述挠性补强板210为黑色，或者不反光的其他颜色，例如枪色，通过将挠性补强板210设置为不反光的颜色，能够防止从挠性补强板表面反射的光信号进入到传感器芯片，影响指纹检测性能。
可选地，在本申请一个实施例中，如图4所示，该指纹识别装置20还包括：
滤光片230，设置在至少一个指纹传感器芯片220的上表面。
应理解，图4仅以所述滤光片230设置在所述至少一个指纹传感器芯片220的上表面作为示例，但本申请不限于此，例如，所述滤光片230可以设 置指纹传感器芯片220的内部，例如，设置在光学组件的表面。
可选地，在本申请一个实施例中，该滤光片230的进光面的反射率低于第一阈值，例如1％，从而能够保证足够的光信号入射到指纹传感器芯片220，进而能够提升指纹识别率。
例如，可以对滤光片的进光面进行光学无机镀膜处理，或者涂覆有机黑化图层以降低所述滤光片的进光面的反射率。
可选地，在本申请一个实施例中，为了降低对指纹传感器芯片的220的进光量的影响，可以通过点胶结构213将滤光片230固定连接于该至少一个指纹传感器芯片220的非感应区域。
此外，所述滤光片230和所述指纹传感器芯片220的感应区域之间为空气间隙，或所述滤光片230和所述指纹传感器芯片220的感应区域之间通过低折射率的透明材料填充，例如，折射率小于1.3的胶水。
在具体实现中，滤光片230可以包括一个或多个光学过滤器，所述一个或多个光学过滤器可以配置为例如带通过滤器，以允许OLED像素发射的光的传输，同时阻挡太阳光中的红外光等其他光组分。当在室外使用所述指纹识别装置时，这种光学过滤器可以有效地减少由太阳光造成的背景光。所述一个或多个光学过滤器可以实现为例如光学过滤涂层，所述光学过滤涂层形成在一个或多个连续界面上，或可以实现为一个或多个离散的界面上。应理解，所述滤光片230可以制作在任何光学部件的表面上，或者沿着到经由手指反射形成的反射光至传感器芯片220的光学路径上。
滤光片230用于来减少指纹感应中的不期望的背景光，以提高指纹传感器芯片220对接收到的光的光学感应。所述滤光片230具体可以用于过滤掉环境光波长，例如，近红外光和部分的红光等。例如，人类手指吸收波长低于～580nm的光的能量中的大部分，如果该一个或多个光学过滤器或光学过滤层被设计为过滤波长从580nm至红外的光，则可以大大减少环境光对指纹感应中的光学检测的影响。
可选地，在本申请一个实施例中，该指纹识别装置还可以包括用于传输信号(例如前文所述的指纹检测信号)的电路板，例如，如图3和图4所示，所述电路板可以为柔性电路板(Flexible Printed Circuit，FPC)240。具体地，该FPC 240的至少部分固定连接在支撑板200的上表面其中一侧的边缘位置，这里的一侧为远离所述卡扣结构203的一侧。
可选地，在一种实现方式中，该FPC 240的至少部分可以通过双面背胶214固定连接在挠性电路板210的上表面其中一侧的边缘位置。
在本申请实施例中，指纹传感器芯片220可以通过金线241连接到FPC240，并通过所述FPC 240实现与其他外围电路或者如图1或图2所示的电子设备中的其他元件的电性互连和信号传输。比如，所述指纹传感器芯片220可以通过所述FPC 240接收所述电子设备的处理单元的控制信号，并且还可以通过所述FPC 240将指纹检测信号(例如指纹图像)输出给所述电子设备的处理单元或者控制单元等。
可选地，在本申请一个实施例中，用于连接所述FPC 240和所述指纹传感器芯片220的金线241的弧高或封装高度可以被设计为低于或平行于所述滤光片230的进光面，以避免金线241增加指纹识别装置的封装高度(或者说厚度)。
可选地，在本申请一个实施例中，当所述至少一个指纹传感器芯片为多个光学指纹传感器芯片时，如图7所示，在所述电路板上靠近所述多个光学指纹传感器芯片的一端设置有至少一个折弯槽242，所述至少一个折弯槽中的一个折弯槽对应相邻的光学指纹传感器芯片之间的间隔区域，这样，可以避免在进行模组组装时，所述电路板230由于发生弯折而影响性能，甚至发生折损。可选地，所述折弯槽242的形状为U形，以避免所述电路板在所述折弯槽的位置发生断裂。
可选地，在本申请一个实施例中，如图7所示，所述电路板为T型软性电路板，所述T型软性电路板的上方设置有多个电容器260，所述多个电容器分别对应连接到所述至少一个指纹传感器芯片220，用于对至少一个指纹传感器芯片220接收的光信号进行滤波处理，得到所述指纹检测信号。
通常来说，电容器的高度较高，为了给电容器260提供容置空间，可以在中框330上电容器260的对应位置开槽，如图5所示的槽334，以使电容器260从中框330的上表面露出，或者也可以在中框330的底面设置容置槽，进而可以将该电容器260设置在该容置槽中，此情况下，该电容器可以不从中框330的上表面露出。
可选地，在本申请一个实施例中，如图4所示，指纹识别装置还可以包括图像处理器270，例如，微处理器(Micro Processing Unit，MCU)，所述图像处理器270用于接收来自FPC 240发送的指纹检测信号(例如指纹图 像)，并基于所述指纹检测信号进行指纹识别。
应理解，图3和图4中所示出的图像处理器270的位置仅为示例，该图像处理器270也可以设置在指纹识别装置20中的其他位置，只要能够通过FPC 240实现与传感器芯片220的连接即可。
作为一个可选实施例，该至少一个指纹传感器芯片220可以通过绑定(Bonding)方式连接在该挠性补强板上，例如，该至少一个指纹传感器芯片220可以通过芯片固定胶211固定连接到挠性补强板。
可选地，在本申请一个实施例中，所述显示屏310的下方还设置有显示屏辅助层320，该显示屏辅助层320包括但不限于遮光层、散热层、缓冲层，其中，该遮光层用于遮挡指纹检测区域之外的其他区域，以避免所述其他区域中的光信号进入传感器芯片，影响指纹检测效果，该散热层可以用于显示屏中的发光单元的散热，该缓冲层可以用于缓冲电子设备受到挤压或碰撞时对显示屏的损伤。
需要说明的是，在本申请实施例中，中框330为电子设备的设置于显示屏310和电池30之间用于承载内部各种组件的框架，其内部各种组件包括但不限于主板，摄像头，排线，各种感应器，话筒，听筒等等零部件。
可选地，中框330可以由金属或者合金材料制成，或者也可以由塑胶材料制成，本申请实施例对此不作限定。
本申请实施例还提供了一种电子设备，所述电子设备可以包括显示屏；如上述本申请各种实施例中的指纹识别装置；中框，设置有卡槽，用于将所述指纹识别装置中的支撑板上的卡扣结构设置在所述凹槽中，其中所述指纹识别装置通过所述中框设置在所述显示屏的下方以进行屏下指纹检测。
应理解，该显示屏可以对应于前述实施例中的显示屏310，其相关说明可以参考可以参照前述关于显示屏310的描述，为了简洁，在此不再赘述。
还应理解，该中框可以对应于前述实施例中的中框330，其相关说明可以参考可以参照前述关于中框330的描述，为了简洁，在此不再赘述。
可选地，在本申请一个实施例中，所述中框上设置有透光开口，所述透光开口用于将所述经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号透射到所述指纹识别装置的至少一个指纹传感器芯片。
可选地，在本申请一个实施例中，在所述中框的上表面所述透光开口的边缘位置设置有至少一个第一卡槽，所述卡扣结构包括至少一个卡扣，其中， 所述至少一个卡扣用于安装到所述至少一个第一卡槽中，且所述至少一个卡扣与所述至少一个第一卡槽一一对应。
可选地，在本申请一个实施例中，所述中框的下表面所述透光开口的边缘位置设置有第二卡槽，所述支撑板的边缘位置的水平方向上还形成有边缘连接部，所述边缘连接部用于安装在所述第二卡槽中。
可选地，在本申请一个实施例中，所述边缘连接部为多个边缘连接部，所述第二卡槽为多个第二卡槽，所述多个边缘连接部用于安装到所述多个第二卡槽中，且所述多个边缘连接部与所述多个第二卡槽一一对应。
可选地，在本申请一个实施例中，所述至少一个第一卡槽和所述多个第二卡槽交替设置在所述透光开口的边缘位置。
可选地，在本申请一个实施例中，所述透光开口为矩形，所述至少一个第一卡槽和所述多个第二卡槽交替设置在所述透光开口的两条短边和一条长边上对应的边缘位置。
可选地，在本申请一个实施例中，所述透光开口设置在所述中框的中间区域或中间偏下区域，以使所述至少一个指纹传感器芯片的指纹检测区域位于所述显示屏的显示区域的中间位置或者中间偏下位置。
可选地，在本申请一个实施例中，所述中框上靠近所述指纹识别装置的电路板的位置上还设置有开孔，以使所述电路板上设置的多个电容器从中框的上表面露出。
可选地，在本申请一个实施例中，所述指纹识别装置与所述电子设备的显示屏的中间区域的发光单元的下表面接触；或所述指纹识别装置与所述显示屏的中间区域的发光单元的下表面不接触，且所述指纹传感器芯片的上表面和所述显示屏的下表面的距离小于第三阈值。
可选地，在本申请一个实施例中，所述第三阈值为600μm。
可选地，在本申请一个实施例中，在显示屏的下方还设置有显示屏辅助层320，其中，该显示屏辅助层320可以包括遮光层、散热层和缓冲层等。
下面结合图8，举例说明指纹识别装置的装配过程。应理解，这仅仅是一种示例，不应理解为对本申请实施例的限定。
首先，在支撑板200上贴装所述至少一个泡棉，并且在挠性补强板上逐层贴装所述至少一个指纹传感器芯片220，所述FPC组件和滤光片，得到指纹模组。
进一步地，将贴有泡棉的支撑板200通过第二定位孔放置在组装器具上，然后通过所述挠性补强板的第一定位孔将指纹模组固定在组装器具上的定位柱上，通过对指纹模组施加一定的压力，将支撑板200和指纹模组固定连接，得到指纹识别装置20；
其次，准备中框330，其中，该中框330上开设有各种用于容置该指纹识别装置20的结构件的开口或开槽，如前文所述的第一卡槽、第二卡槽和用于容置电容器的开槽。
将指纹识别装置20从中框330的侧边进行装配，以使支撑板200的边缘位置的卡扣结构和所述中框上的第一卡槽卡合，边缘连接部和第二卡槽卡合，具体连接效果可以参考图4所示的剖视图，这里不再赘述。
进一步地，可以在中框330的上方依次设置显示屏辅助层320和显示屏310，从而实现将指纹识别装置20安装在电子设备的显示屏310的下方。
因此，根据本申请实施例的屏下指纹装配方案，只需在指纹识别装置的支撑板上设置一定数量的卡扣，在中框中设置一定数量和尺寸的卡槽，从而可以通过支撑板上的卡扣结构将指纹识别装置固定在中框的卡槽中，进一步将指纹识别装置20设置在显示屏310的下方，进而实现屏下的光学指纹识别。
应理解，本申请实施例中的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例，而非限制本申请实施例的范围。
应理解，在本申请实施例和所附权利要求书中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请实施例。例如，在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“上述”和“所述”也旨在包括多数形式，除非上下文清楚地表示其他含义。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应所述理解到，所揭露的系统、装置， 可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者所述技术方案的全部或部分可以以软件产品的形式体现出来，所述计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (38)

  1. 一种指纹识别装置，应用于具有显示屏的电子设备，其特征在于，所述指纹识别装置包括：
    支撑板，所述支撑板的边缘位置具有向上翘起的卡扣结构，所述卡扣结构用于安装到所述电子设备的中框的卡槽内；
    至少一个指纹传感器芯片，设置在所述支撑板的上方，并通过所述支撑板设置在所述显示屏的下方；
    其中，所述至少一个指纹传感器芯片用于接收经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号，所述指纹检测信号用来检测所述手指的指纹信息。
  2. 根据权利要求1所述的指纹识别装置，其特征在于，所述卡扣结构包括至少一个卡扣，所述中框的上表面设置有至少一个第一卡槽，其中，所述至少一个卡扣用于安装到所述至少一个第一卡槽中，且所述至少一个卡扣与所述至少一个第一卡槽一一对应。
  3. 根据权利要求2所述的指纹识别装置，其特征在于，所述支撑板的边缘位置的水平方向上还形成有边缘连接部，所述中框的下表面设置有第二卡槽，所述边缘连接部用于安装在所述第二卡槽中。
  4. 根据权利要求3所述的指纹识别装置，其特征在于，所述边缘连接部为多个边缘连接部，所述第二卡槽为多个第二卡槽，所述多个边缘连接部用于安装到所述多个第二卡槽中，且所述多个边缘连接部与所述多个第二卡槽一一对应。
  5. 根据权利要求4所述的指纹识别装置，其特征在于，所述至少一个卡扣和所述多个边缘连接部交替设置在所述支撑板的边缘位置。
  6. 根据权利要求5所述的指纹识别装置，其特征在于，所述支撑板为矩形，所述至少一个卡扣和所述多个边缘连接部交替设置在所述支撑板的两条短边和一条长边上。
  7. 根据权利要求3至6中任一项所述的指纹识别装置，其特征在于，在所述卡扣和所述边缘连接部之间设置有从所述支撑板的侧面向内的凹陷部。
  8. 根据权利要求2至7中任一项所述的指纹识别装置，其特征在于，所述卡扣为直角L型或圆角L型。
  9. 根据权利要求1至8中任一项所述的指纹识别装置，其特征在于，所述指纹识别装置还包括：
    电路板，所述电路板的至少部分连接在所述支撑板的上表面一侧的边缘位置，所述电路板和所述至少一个指纹传感器芯片连接。
  10. 根据权利要求9所述的指纹识别装置，其特征在于，所述电路板的至少部分连接在所述支撑板的上表面上远离所述卡扣结构的一侧的边缘位置。
  11. 根据权利要求9或10所述的指纹识别装置，其特征在于，当所述至少一个指纹传感器芯片为多个光学指纹传感器芯片时，在所述电路板上靠近所述多个光学指纹传感器芯片的一端设置有至少一个折弯槽，所述至少一个折弯槽中的一个折弯槽对应相邻的光学指纹传感器芯片之间的间隔区域。
  12. 根据权利要求11所述的指纹识别装置，其特征在于，所述折弯槽为U型槽。
  13. 根据权利要求9至12中任一项所述的指纹识别装置，其特征在于，所述电路板为T型软性电路板，所述T型软性电路板的上方设置有多个电容器，所述多个电容器分别对应连接到所述至少一个指纹传感器芯片。
  14. 根据权利要求9至13中任一项所述的指纹识别装置，其特征在于，所述指纹识别装置还包括：
    滤光片，设置在所述至少一个指纹传感器芯片的上表面，其中，所述滤光片的进光面的反射率低于第一阈值。
  15. 根据权利要求14所述的指纹识别装置，其特征在于，通过对滤光片的进光面进行光学无机镀膜处理，或者涂覆有机黑化图层以使所述滤光片的进光面的反射率低于第一阈值。
  16. 根据权利要求14或15所述的指纹识别装置，其特征在于，所述滤光片通过点胶方式固定连接于所述至少一个指纹传感器芯片的非感应区域。
  17. 根据权利要求14至16中任一项所述的指纹识别装置，其特征在于，所述滤光片和所述至少一个指纹传感器芯片之间为空气间隙，或所述滤光片和所述至少一个指纹传感器芯片之间通过胶水填充，其中，所述胶水的折射率低于第二阈值。
  18. 根据权利要求14至17中任一项所述的指纹识别装置，其特征在于，所述电路板通过金线与所述至少一个指纹传感器芯片连接，其中，所述金线 的弧高或封装高度低于或平行于所述滤光片的进光面。
  19. 根据权利要求1至18中任一项所述的指纹识别装置，其特征在于，所述指纹识别装置还包括：
    挠性补强板，设置在所述至少一个指纹传感器芯片的下表面，所述至少一个指纹传感器芯片通过所述挠性补强板设置在所述支撑板的上方。
  20. 根据权利要求19所述的指纹识别装置，其特征在于，若所述至少一个指纹传感器芯片包括多个光学指纹传感器芯片，在所述挠性补强板上沿特定边的方向上设置有第一定位孔，所述第一定位孔对应所述多个光学指纹传感器芯片中的相邻光学指纹传感器芯片的间隔区域。
  21. 根据权利要求20所述的指纹识别装置，其特征在于，所述第一定位孔的孔口形状为长圆形或者椭圆形。
  22. 根据权利要求20或21所述的指纹识别装置，其特征在于，所述支撑板上设置有第二定位孔，所述第二定位孔对应所述多个光学指纹传感器芯片中的相邻光学指纹传感器芯片的间隔区域。
  23. 根据权利要求22所述的指纹识别装置，其特征在于，所述第二定位孔的孔口形状为长圆形或者椭圆形。
  24. 根据权利要求22或23所述的指纹识别装置，其特征在于，所述第一定位孔为多个，所述第二定位孔为多个，多个所述第一定位孔和多个所述第二定位孔一一对应。
  25. 根据权利要求19至24中任一项所述的指纹识别装置，其特征在于，所述挠性补强板的厚度在0.075mm至0.15mm之间。
  26. 根据权利要求19至25中任一项所述的指纹识别装置，其特征在于，所述挠性补强板的表面粗糙度大于0.25μm。
  27. 根据权利要求19至26中任一项所述的指纹识别装置，其特征在于，所述电子设备还包括：
    至少一个泡棉，设置于所述挠性补强板和所述支撑板之间，所述至少一个泡棉与所述至少一个指纹传感器芯片一一对应。
  28. 根据权利要求1至27中任一项所述的指纹识别装置，其特征在于，所述支撑板为金属材质，所述支撑板的厚度在0.15mm至0.20mm之间。
  29. 根据权利要求28所述的指纹识别装置，其特征在于，所述支撑板的表面粗糙度大于0.25μm。
  30. 一种电子设备，其特征在于，包括：
    显示屏；
    如权利要求1至29中任一项所述的指纹识别装置；
    中框，设置有卡槽，用于将所述指纹识别装置中的支撑板上的卡扣结构设置在所述凹槽中，其中所述指纹识别装置通过所述中框设置在所述显示屏的下方以进行屏下指纹检测。
  31. 根据权利要求30所述的电子设备，其特征在于，所述中框上设置有透光开口，所述透光开口用于将所述经由所述显示屏上方的人体手指反射或散射而返回的指纹检测信号透射到所述指纹识别装置的至少一个指纹传感器芯片。
  32. 根据权利要求31所述的电子设备，其特征在于，在所述中框的上表面所述透光开口的边缘位置设置有至少一个第一卡槽，所述卡扣结构包括至少一个卡扣，其中，所述至少一个卡扣用于安装到所述至少一个第一卡槽中，且所述至少一个卡扣与所述至少一个第一卡槽一一对应。
  33. 根据权利要求32所述的电子设备，其特征在于，所述中框的下表面所述透光开口的边缘位置设置有第二卡槽，所述支撑板的边缘位置的水平方向上还形成有边缘连接部，所述边缘连接部用于安装在所述第二卡槽中。
  34. 根据权利要求33所述的电子设备，其特征在于，所述边缘连接部为多个边缘连接部，所述第二卡槽为多个第二卡槽，所述多个边缘连接部用于安装到所述多个第二卡槽中，且所述多个边缘连接部与所述多个第二卡槽一一对应。
  35. 根据权利要求34所述的电子设备，其特征在于，所述至少一个第一卡槽和所述多个第二卡槽交替设置在所述透光开口的边缘位置。
  36. 根据权利要求35所述的电子设备，其特征在于，所述透光开口为矩形，所述至少一个第一卡槽和所述多个第二卡槽交替设置在所述透光开口的两条短边和一条长边上对应的边缘位置。
  37. 根据权利要求31至36中任一项所述的电子设备，其特征在于，所述透光开口设置在所述中框的中间区域或中间偏下区域，以使所述至少一个指纹传感器芯片的指纹检测区域位于所述显示屏的显示区域的中间位置或者中间偏下位置。
  38. 根据权利要求30至37中任一项所述的电子设备，其特征在于，所 述中框上靠近所述指纹识别装置的电路板的位置上还设置有开孔，以使所述电路板上设置的多个电容器从中框的上表面露出。
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