WO2019153640A1 - 屏下生物特征识别装置和电子设备 - Google Patents

屏下生物特征识别装置和电子设备 Download PDF

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Publication number
WO2019153640A1
WO2019153640A1 PCT/CN2018/094791 CN2018094791W WO2019153640A1 WO 2019153640 A1 WO2019153640 A1 WO 2019153640A1 CN 2018094791 W CN2018094791 W CN 2018094791W WO 2019153640 A1 WO2019153640 A1 WO 2019153640A1
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WO
WIPO (PCT)
Prior art keywords
under
screen
lens
biometric device
middle frame
Prior art date
Application number
PCT/CN2018/094791
Other languages
English (en)
French (fr)
Inventor
蒋鹏
罗忠波
侯志明
蔡军
Original Assignee
深圳市汇顶科技股份有限公司
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.)
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=62895862&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2019153640(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to CN201880001093.6A priority Critical patent/CN108885696B/zh
Priority to CN201920739930.7U priority patent/CN209895353U/zh
Priority to CN201920776883.3U priority patent/CN209962265U/zh
Priority to CN201922342046.2U priority patent/CN213182770U/zh
Publication of WO2019153640A1 publication Critical patent/WO2019153640A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0025—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having one lens only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/1347—Preprocessing; Feature extraction
    • G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H01L27/14678—Contact-type imagers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly

Definitions

  • Embodiments of the present application relate to the field of biometrics and, more particularly, to a screen biometric device and an electronic device.
  • biometrics technology has received more and more attention from people, and more convenient on-screen biometrics technology, such as the practical use of fingerprint recognition technology under the screen, has become a popular requirement.
  • the screen optical fingerprint recognition technology mainly includes an on-screen optical fingerprint recognition technology based on a periodic micro-hole array and an integrated micro-lens screen optical fingerprint recognition technology.
  • the former optical fingerprint recognition technology is susceptible to Moire fringes, and the optical fingerprint recognition module needs to be attached to the OLED screen, and the process is complicated.
  • the fingerprint recognition module of the latter type of optical fingerprint recognition technology is integrated, and the precision of the entire optical fingerprint recognition module is very high in the mass production process, and the general processing technology is basically insufficient for practical needs. Due to the existence of various problems mentioned above, the efficiency of the biometric recognition under the screen is affected.
  • An off-screen biometric device and an electronic device are provided, which can improve the efficiency of biometric recognition under the screen.
  • an off-screen biometric device comprising:
  • a lens disposed below the display screen for receiving an optical signal formed from a reflection of a human finger from above the display screen, wherein the optical signal is used to detect biometric information of the finger;
  • a bracket is connected between the bracket and the barrel by a threaded connection for supporting the barrel.
  • a rubber structure is formed between the lens barrel and the bracket, and a threaded connection between the lens barrel and the bracket is performed by dispensing in the dispensing structure. Fix it.
  • the dispensing structure includes a first stepped structure formed by an upper surface of the bracket extending downward in a peripheral region of the threaded hole.
  • the lens includes an aspherical lens or an aspherical lens group.
  • the lower surface of the bracket extends downwardly in a peripheral region of the threaded hole to form a first protruding structure, and the lens is mounted in the first protruding structure.
  • a lower surface of the bracket is formed with a second raised structure between the first raised structure and an edge of the bracket.
  • the upper surface of the barrel extends inwardly at the barrel to form a third raised structure for securing the lens.
  • the upper surface of the lens barrel is formed with an oblique angle at the barrel mouth by chamfering treatment, such that the inner diameter of the lens barrel at the upper surface is larger than the lens barrel at the third protrusion The inner diameter of the structure.
  • an inner side surface of the lens barrel is formed with a second step structure under the third convex structure, and the lens is fixed in the lens barrel by the second step structure.
  • an outer side surface of the lens barrel forms a fifth convex structure below the third convex structure, and the fifth convex structure is formed with an external thread.
  • the off-screen biometric device further includes:
  • An imaging chip disposed below the lens barrel, the imaging chip for imaging based on an optical signal passing through the lens, wherein a distance between the lens and the imaging chip is rotated by the The lens barrel is adjusted.
  • the distance between the optical center of the lens and the upper surface of the imaging chip is equal to the imaging distance of the lens.
  • the upper side of the lens barrel extends outwardly at the edge region to form at least one fifth convex structure, and the fifth convex structure is configured to rotate the lens barrel to adjust the The distance between the lens and the imaging chip.
  • the off-screen biometric device further includes:
  • optical filter located between the lens and the imaging chip.
  • the optical filter is attached to an upper surface of the imaging chip.
  • the optical filter is fixed within the barrel.
  • an edge region of a lower surface of the lens extends downward to form a convex ring structure, and a lower surface of the convex ring structure is in contact with the filter, and an outer edge region of the convex ring structure
  • the upper surface of the filter sheet is fixedly connected by a glue material fixing method.
  • the off-screen biometric device further includes:
  • a microlens array the microlens array being fixed to an upper surface of the imaging chip, the microlens array for imaging an optical signal passing through the lens to an imaging pixel unit of the imaging chip.
  • each of the imaging pixel units in the imaging chip corresponds to one of the microlens arrays.
  • the microlens in the microlens array is a hemispherical lens
  • the imaging pixel unit is a polygon
  • the diameter of the hemispherical lens is the length of the long side of the polygon.
  • the off-screen biometric device further includes:
  • the imaging chip being fixed on an upper surface of the flexible printed circuit board, a lower surface of the bracket and an upper surface of the flexible printed circuit board being fixed at an edge region of the imaging chip connection.
  • the bracket is formed with a venting hole for adjusting the air pressure strength of the internal space formed by the bracket and the flexible printed circuit board.
  • the off-screen biometric device further includes:
  • the off-screen biometric device further includes:
  • a holder fixed by the holder below the display screen such that a distance between an upper surface of the display screen and the optical center of the lens satisfies imaging conditions.
  • the under-screen biometric device is applied to an electronic device
  • the mount is a middle frame of the electronic device
  • the middle frame is used to support the display screen.
  • the middle frame and the bracket are fixed by mounting in any of the following mounting manners: a screw mounting and fixing manner, a glue fitting fixing manner, a welding fixing manner, and a coupling fixing manner.
  • the middle frame is formed with an opening
  • the lens barrel is at least partially received in the opening
  • a gap exists between the outer side of the lens barrel and the inner side of the opening.
  • the upper surface of the middle frame is formed with an oblique angle by chamfering at the edge of the opening, the oblique angle making the opening width of the upper surface of the middle frame larger than the middle frame The opening width of the lower surface.
  • the upper surface of the middle frame is formed with a third stepped structure in an edge region of the opening.
  • the lower surface of the middle frame extends downwardly in a peripheral region of the opening to form a fifth convex structure, and the bracket is installed inside the fifth convex structure.
  • the lower surface of the middle frame extends upwardly at an edge region of the opening to form a groove structure, and the bracket is installed in the groove structure.
  • the off-screen biometric device further includes:
  • a foam disposed between an upper surface of the bracket and a lower surface of the middle frame.
  • an electronic device comprising:
  • the off-screen biometric device of the first aspect is the off-screen biometric device of the first aspect.
  • the electronic device further includes:
  • the off-screen biometric device is disposed below the display screen, and the distance between the upper surface of the display screen and the optical center of the lens in the under-the-screen biometric device satisfies imaging condition.
  • the threaded connection between the bracket and the lens barrel in the embodiment of the present application enables the desired optical imaging to be achieved by focusing, in the process of assembling the under-the-screen biometric device 140, thereby reducing the
  • the requirements of the processing technology also solve the problem of batch yield of the integrated module in the production assembly process and the problem that the optimal focal length of the integrated module cannot be precisely aligned, thereby improving the biometric recognition of the screen. effectiveness.
  • the optical fingerprint recognition module is attached to the lower surface of the display screen, and only the under-the-screen biometric identification device 140 needs to be disposed under the display screen, for example, the lens is disposed on the display.
  • the lower part of the screen effectively simplifies the installation process of the under-the-screen biometric device 140, improves the batch yield during the installation process of the screen biometric device 140, and reduces the replacement of the under-the-screen biometric device 140. The rate of damage in the process, which in turn reduces costs.
  • FIG. 1 is a schematic plan view of a mobile terminal to which the present application is applicable.
  • Figure 2 is a partial cross-sectional view of the mobile terminal of Figure 1 taken along line A'-A'.
  • Figure 3 is an oriented view of the under-screen biometric device.
  • Figure 4 is an oriented view of the stent of the under-the-screen biometric device of Figure 3.
  • Figure 5 is an oriented view of the lens barrel of the under-the-screen biometric device of Figure 3.
  • Figure 6 is a partial cross-sectional view of the under-screen biometric device of Figure 3 taken along B'-B'.
  • Figure 7 is an orientation view of the under-screen biometric device of the embodiment of the present application.
  • FIG. 8 is an orientation view of a filter, an imaging chip, a circuit board, and an image processor in the under-the-screen biometric device shown in FIG.
  • Figure 9 is a partial cross-sectional view of the under-screen biometric device of Figure 7 taken along C'-C'.
  • FIG. 10 is a schematic structural view of a filter according to an embodiment of the present application in a lens barrel.
  • FIG. 11 is a schematic structural view of an imaging chip having a microlens array according to an embodiment of the present application.
  • FIG. 13 to FIG. 18 are schematic structural diagrams of the under-screen biometric device according to the embodiment of the present application under the display screen.
  • Off-screen biometric recognition techniques may include under-the-screen optical biometrics, under-the-screen ultrasound biometrics, or other types of under-the-screen biometrics.
  • the on-screen optical biometric recognition technology uses the light returned from the top surface of the device display component for fingerprint sensing and other sensing operations.
  • the returned light carries information of an object (eg, a finger) in contact with the top surface, and a particular optical sensor module located below the display screen is achieved by capturing and detecting the returned light.
  • the design of the particular optical sensor module may be to achieve desired optical imaging by properly configuring optical elements for capturing and detecting returned light.
  • the technical solution of the embodiment of the present application can perform other biometrics, such as the identification of the living body, in addition to the fingerprint recognition, which is not limited by the embodiment of the present application.
  • FIG. 1 and FIG. 2 are schematic diagrams showing an electronic device 100 to which the biometrics device can be applied.
  • FIG. 1 is a front view of the electronic device 100 to which the biometrics device can be applied.
  • FIG. 2 is a schematic view of the electronic device 100.
  • the electronic device 100 can include a display screen 120 and a screen biometric device 140, wherein the display screen 120 has a display area 102, and the under-the-screen biometric device 140 is disposed at Below the display screen 120.
  • the display screen 120 may be a self-illuminating display screen that employs a self-illuminating display unit as a display pixel.
  • the display 120 can be an Organic Light-Emitting Diode (OLED) display or a Micro-LED display.
  • the display screen 120 can also be a liquid crystal display (LCD) or other passive light-emitting display. This embodiment of the present application does not limit this.
  • the display screen 120 can be a touch display screen, which can not only display the screen but also detect the touch or pressing operation of the user, thereby providing the user with a human-computer interaction interface.
  • the electronic device 100 may include a touch sensor, and the touch sensor may be specifically a touch panel (TP), which may be disposed on the surface of the display screen 120, or may be partially Integrated or integrated into the display screen 120 to form the touch display.
  • TP touch panel
  • the under-screen biometric device 140 may be an optical down-screen biometric device, which may include an optical biometric sensor having an optical sensing array, such as an optical fingerprint sensor; the optical sensing array includes a plurality of optical sensing units, and the The area where the optical sensing array is located is the biometric collection area of the under-the-screen biometric identification device 140, and the plurality of optical sensing units are used to collect fingerprint characteristic information (such as fingerprint image information) of the user.
  • an optical down-screen biometric device which may include an optical biometric sensor having an optical sensing array, such as an optical fingerprint sensor; the optical sensing array includes a plurality of optical sensing units, and the The area where the optical sensing array is located is the biometric collection area of the under-the-screen biometric identification device 140, and the plurality of optical sensing units are used to collect fingerprint characteristic information (such as fingerprint image information) of the user.
  • fingerprint characteristic information such as fingerprint image information
  • the under-screen biometric device 140 can be disposed at least in a partial area below the display screen 120 such that the biometric collection area (or sensing area) of the under-the-screen biometric device 140 is at least partially located on the display of the display screen 120. Within area 102.
  • the biometric acquisition area 130 is located in the display area 102 of the display screen 120. Therefore, when the user needs to unlock the electronic device or other biometrics, the user only needs to press a finger on the biometric collection area 130 of the display screen 120, so that the biometric input operation can be realized. Since the biometrics collection detection can be implemented inside the display area 102 of the display screen 120, the electronic device 100 adopting the above structure can set a fingerprint button (such as a Home button) without requiring a space on the front side thereof, so that a full screen scheme can be adopted. That is, the display area 102 of the display screen 120 can be substantially extended to the entire front surface of the electronic device 100.
  • a fingerprint button such as a Home button
  • the display screen 120 is exemplified by an OLED display, and the display screen 120 has an OLED display unit arranged in an array, and the under-the-screen biometric device 140 can utilize the OLED display.
  • An OLED display unit ie, an OLED light source located at the biometric acquisition area 130 is used as an excitation light source for biometric detection recognition.
  • the under-screen biometric device 140 may also employ an internal light source or an external light source to provide an optical signal for biometric detection and recognition, in which case
  • the biometric recognition device under the screen can be applied not only to a self-illuminating display such as an OLED display, but also to a non-self-illuminating display such as a liquid crystal display or other passive illumination display.
  • the optical sensing array of the under-the-screen biometric device 140 may specifically be a photo detector array (or photodetector array) including a plurality of photodetectors or optoelectronics distributed in an array. A detector, the photodetector or photodetector can be used as the optical sensing unit as described above.
  • the reflected light may carry fingerprint feature information of a user's finger. For example, after the light is reflected by the fingerprint of the surface of the user's finger, since the reflected light of the fingerprint and the grain of the fingerprint is different, the reflected light is carried with the fingerprint information of the user.
  • the reflected light is returned to the display screen 120 and received by the photodetector array of the underlying biometric device 140 below it and converted into a corresponding electrical signal, ie, a biometric detection signal.
  • the electronic device 100 can obtain biometric information of the user based on the biometric detection signal, and can further perform biometric matching verification, thereby completing identity verification of the current user to confirm whether it has authority to the electronic device 100. Take the appropriate action.
  • the under-screen biometric device 140 may also be disposed over the entire area below the display screen 120 to extend the biometric collection area 130 to the entire display of the display screen 120. Region 102 implements full screen biometrics.
  • the electronic device 100 may further include a protective cover 110, which may be a transparent cover, such as a glass cover or a sapphire cover, which is located on the display.
  • a protective cover 110 which may be a transparent cover, such as a glass cover or a sapphire cover, which is located on the display.
  • the front surface of the screen 120 covers the front surface of the electronic device 100, and the surface of the protective cover 110 may also be provided with a protective layer. Therefore, in the embodiment of the present application, the so-called finger pressing the display screen 120 may actually refer to the cover plate 110 pressed by the finger above the display screen 120 or the surface of the protective layer covering the cover plate 110.
  • the under-screen biometric device 140 can transmit light to the sensing array by using a periodic micro-hole array, which requires the optical fingerprinting module to be attached to the OLED screen, which is complicated and costly.
  • the under-screen biometric device 140 can transmit light to the sensing array by using an integrated microlens, which is designed to design the microlens and the sensing array as a whole. Forming an integrated module, because the integrated module has very high precision requirements in the mass production process, the general processing technology is basically sufficient to meet the actual needs.
  • the embodiment of the present application provides an improved technical solution.
  • the off-screen biometric device 140 uses a lens to transmit light onto the sensing array.
  • the under-screen biometric device 140 may include a bracket and a lens barrel with a lens built therein, the lens being disposed under the display screen for receiving light formed by reflection from a human finger above the display screen a signal, wherein the optical signal is used to detect biometric information of the finger; for example, the optical signal may be reflected light carrying fingerprint information of the finger as described above, which may be used to detect the finger Fingerprint information.
  • the bracket and the barrel are connected by a threaded connection for supporting the barrel.
  • the lens in the embodiment of the present application needs to be configured as a component or device for modulating light that is more accurate and smaller than the assembly process of the front camera for photographing. In order to achieve the precise focus of the screen optical fingerprint.
  • the biometric device 140 can be disposed under the display screen.
  • the lens is disposed under the display screen, which simplifies the installation process of the under-the-screen biometric device 140 and improves the biometric recognition of the screen.
  • the batch yield in the installation process of the device 140 reduces the damage rate during the replacement process of the under-screen biometric device 140, thereby effectively reducing the cost.
  • the technical solution of the embodiment of the present application is opposite to the latter implementation (using an integrated microlens to transmit light onto the sensing array), and the screw connection between the bracket and the lens barrel enables the biometric recognition under the screen.
  • the desired optical imaging can be realized by focusing, thereby reducing the requirements on the processing technology, and effectively solving the problem that the integrated module has too high precision in the mass production process, and thus The problem of batch yield of the integrated module in the production and assembly process is solved, and the problem that the optimal focal length of the integrated module cannot be accurately aligned is solved, thereby improving the efficiency of the biometric recognition under the screen.
  • the under-the-screen biometric device 300 in the embodiment of the present application will be clearly described below with reference to FIGS. 3 to 5. It should be noted that, in the embodiments of the present application, the same reference numerals are given to the same components, and the detailed description of the same components is omitted in the different embodiments for the sake of brevity.
  • FIG. 3 through 13 show schematic views of the under-screen biometric device 200, wherein FIG. 3 is an orientation view of the under-the-screen biometric device 200. 4 is an orientation view of the bracket 230 of the under-the-screen biometric device 200 of FIG. Figure 5 is an orientation view of the lens barrel 220 of the under-the-screen biometric device 200 of Figure 3.
  • Figure 6 is a partial cross-sectional view of the under-the-screen biometric device 200 of Figure 3 taken along B'-B'.
  • the under-screen biometric device 200 may include a lens 210, a lens barrel 220, and a bracket 230.
  • the lens 210 is disposed under the display screen, and the lens 210 is configured to receive an optical signal formed by reflection from a human finger above the display screen. For example, after the light emitted by the display screen is reflected by the finger above the display screen, a portion of the reflected light can be received by the lens 210.
  • the lens 210 is fixed in the lens barrel 220.
  • the bracket 230 and the lens barrel 220 are connected by a screw connection, and the bracket 230 is used to support the lens barrel 220.
  • the display screen may be the display screens shown in FIG. 1 and FIG. 2 .
  • no further details are provided herein.
  • the lens 210 may include an aspherical lens or an aspherical lens group to reduce imaging distortion of the fingerprint image.
  • the focal length of the aspherical lens or the aspherical lens group may be smaller than the focal length of the front camera for photographing or the lens 210 is a macro lens to meet the requirements for fingerprint recognition under the screen.
  • the focal length of the macro lens may range from 0.5 mm to 1.8 mm. It should be noted that the range is only an exemplary range of the gap, and embodiments of the present application are not limited thereto.
  • the focal length of the macro lens may also be 2 mm.
  • the desired optical imaging can be achieved by adjusting the height of the lens barrel 220 by an auto-focusing machine.
  • a rubber structure may be formed between the lens barrel 220 and the bracket 230, and the screw connection between the lens barrel 220 and the bracket 230 is performed by dispensing in the dispensing structure.
  • the dispensing structure may include a first step structure 231 formed by an upper surface of the bracket 230 extending downward in a peripheral region of the threaded hole, which may provide a receiving space for the glue, This can be attached to the lens barrel 220 and the holder 230 in a dispensing manner by the dispensing space provided in the first step structure 231.
  • the first step structure 231 can include one or more steps.
  • the embodiment of the present application is not specifically limited.
  • the first step structure 231 includes two steps.
  • the threaded holes of the first stepped structure 231 along the upper surface of the bracket 230 may be continuous or discrete.
  • the embodiment of the present application is not specifically limited.
  • the first stepped structure 231 presents a concave ring along the threaded bore of the upper surface of the bracket 230.
  • the lower surface of the bracket 230 may be thickened in the peripheral region of the threaded hole to increase the reliability of the threaded connection between the bracket 230 and the lens barrel 220.
  • the lower surface of the bracket 230 is formed with a first convex structure 233 extending downward in a peripheral region of the screw hole, and the lens 210 is mounted in the first convex structure 233.
  • the threaded holes of the first protruding structure 233 along the lower surface of the bracket 230 may be continuous or discrete, which is not specifically limited in the embodiment of the present application.
  • a thick portion of the bracket 230 may be thickened to strengthen the strength of the bracket 230.
  • the lower surface of the bracket 230 is formed with a second raised structure 234 between the first raised structure 233 and the edge of the bracket 230.
  • the second protruding structure 234 may be continuous or discrete in a certain direction, which is not limited in the embodiment of the present application.
  • a structure for preventing the lens 210 from moving upward may be provided at the mouth of the upper surface of the lens barrel 220.
  • the upper surface of the lens barrel 220 extends inwardly at the barrel opening to form a third convex structure 222 for fixing the lens 210.
  • the inner surface of the lens barrel 220 and the lens 210 may be fixed by a glue-bonding fixing manner.
  • the upper surface of the third protruding structure 222 may be designed as a specific structure, such as a funnel structure or a bevel structure, so that the optical signal reflected from the display screen via the human finger is as Passing through the third raised structure 222 increases the amount of signals received by the lens 210.
  • the upper surface of the lens barrel 220 is formed with an oblique angle at the barrel opening by chamfering processing, so that the inner diameter of the lens barrel 220 at the upper surface is larger than that of the lens barrel 220 at the third convex structure 222. The inner diameter of the place.
  • an additional space for accommodating glue may be disposed between the inner side surface of the lens barrel 220 and the lens to increase the reliability of the fit between the inner side surface of the lens barrel 220 and the lens 210. degree.
  • the inner side surface of the lens barrel 220 is formed with a second step structure 223 below the third convex structure 222, and the lens 210 is fixed in the lens barrel 220 by the second step structure 223.
  • the second step structure 223 can greatly increase the accommodation space of the glue.
  • the tube wall of the lens barrel 220 may be further thickened to increase the barrel strength of the lens barrel 220.
  • the outer side surface of the lens barrel 220 may be formed below the third convex structure 222 by the fourth convex structure 224, and the fourth convex structure 224 is formed with external threads.
  • the upper surface of the lens barrel 220 may be formed with a structure for an autofocus machine to perform a focusing operation.
  • the upper side of the lens barrel 220 extends outwardly at the edge region to form at least one fifth convex structure 221 for rotating the lens barrel 220 to adjust the distance between the lens 210 and the imaging chip 250.
  • the fifth protruding structure 221 may be continuous or discrete in a certain direction, which is not limited in the embodiment of the present application.
  • at least one fifth raised structure 221 is four protruding petals.
  • the lens 210, the lens barrel 220, and the bracket 230 may be designed with other structures in a specific implementation.
  • the lens 210 can also be designed with a size mark (a) 225 of the lens 210.
  • the lens barrel 220 can also be designed with the size mark (A1) 236 of the lens barrel 220 and the countersink for mounting. 235.
  • the bracket 230 can also be designed with a hole 237 for securing the bracket 230, such as a threaded mounting hole.
  • FIG. 7 to 9 are schematic diagrams of the under-screen biometric device 200 according to an embodiment of the present application.
  • 7 is an orientation view of the screen biometric device 200 integrated with the filter 260, the imaging chip 250, the circuit board, and the image processor 280
  • FIG. 8 is the screen biometric device 200 shown in FIG.
  • Figure 9 is a partial cross-sectional view of the under-screen biometric device 200 of Figure 7 taken along C'-C'.
  • an optical signal formed by reflection from a human finger above the display screen is modulated by the lens 210 and can be used for imaging the fingerprint image.
  • the screen biometric device 200 may further include:
  • the imaging chip 250 is disposed under the lens barrel 220 for imaging based on an optical signal passing through the lens 210, wherein the distance between the lens 210 and the imaging chip 250 is adjusted by rotating the lens barrel 220 . In other words, the distance between the lens 210 and the imaging chip 250 can be adjusted by adjusting the height of the lens barrel 220.
  • the distance between the optical center of the lens 210 and the upper surface of the imaging chip 250 is equal to the imaging distance of the lens 210.
  • the distance between the lens 210 and the imaging chip 250 can be adjusted by the auto-focusing machine to adjust the height of the lens barrel 220 to achieve a desired fingerprint image. Imaging.
  • the imaging distance of the lens 210 may be greater than the focal length of the lens 210.
  • the distance between the lens 210 and the imaging chip 250 may be the distance between the optical center of the lens 210 and the upper surface of the imaging chip 250, wherein the optical center of the lens 210 is a special point in the lens 210, where it passes.
  • the light of the special point has the same direction of propagation.
  • the optical center of the lens 210 is also referred to as the optical center of the lens 210.
  • the imaging chip 250 receives the optical signal modulated by the lens 210 and acquires a biometric detection signal (such as a fingerprint image) based on the received optical signal, and the biometric detection signal is used for fingerprint recognition.
  • the imaging chip 250 first receives the optical signal modulated by the lens 210 and performs imaging based on the received optical signal to generate a fingerprint image; then, the fingerprint image is transmitted to the image processor so that the image processor Image processing is performed and a fingerprint signal is obtained; finally, the fingerprint signal is fingerprinted by an algorithm.
  • the screen biometric device 200 may further include a circuit board for transmitting signals.
  • the circuit board may be a flexible circuit.
  • the imaging chip 250 can be soldered to the FPC 270 through a pad and electrically interconnected and signaled with other peripheral circuits or other components of the electronic device 100 as shown in FIG. 1 or FIG. 2 by the FPC 270.
  • the imaging chip 250 may receive a control signal of a processing unit of the electronic device 100 through the FPC 270, and may also output the biometric detection signal (eg, a fingerprint image) to the A processing unit or control unit of the electronic device 100 or the like.
  • the screen biometric device 200 further includes a steel plate fixed on a lower surface of the flexible printed circuit board.
  • the screen biometric device 200 may further include an image processor 280 for receiving the transmission from the FPC 270.
  • a biometric detection signal eg, a fingerprint image
  • fingerprinting based on the biometric detection signal.
  • the imaging chip 250 is fixed on the upper surface of the FPC 270, and the lower surface of the bracket 230 and the upper surface of the FPC 270 are in the edge region of the imaging chip 250. Fixed connection.
  • the bracket 230 is fixed on the upper surface of the FPC 270, the bracket 230 and the FPC 270 bracket form a closed space, for example, to avoid the screen being too large or too small due to the pressure of the closed space.
  • the stability of the biometric device 200 is lowered.
  • the bracket 230 is formed with a vent hole 232 for adjusting the air pressure of the inner space formed by the bracket 230 and the FPC 270.
  • the optical signal passing through the lens 210 may also be filtered by an optical filter to filter out unnecessary light.
  • the screen biometric device 200 further includes an optical filter 260 , and the optical filter 260 is located between the lens 210 and the imaging chip 250 .
  • Filter 260 is used to reduce undesired background light in fingerprint sensing to enhance optical sensing of received light by imaging chip 250.
  • the filter 260 can be specifically used to filter out ambient light wavelengths, such as near-infrared light and partial red light. For example, a human finger absorbs most of the energy of light having a wavelength below ⁇ 580 nm. If one or more optical filters or optical filter coatings can be designed to filter light from 580 nm to infrared, ambient light can be greatly reduced. The effect of optical detection in fingerprint sensing.
  • the filter 260 may include one or more optical filters, which may be configured, for example, as a band pass filter to allow light emitted by the OLED pixels Transmission while blocking other light components such as infrared light in sunlight. When the under-screen biometric device 200 is used outdoors, such optical filtering can effectively reduce background light caused by sunlight.
  • the one or more optical filters can be implemented, for example, as an optical filter coating formed on one or more continuous interfaces, or can be implemented as one or more discrete interfaces. It should be understood that the filter 260 can be fabricated on the surface of any optical component or along the optical path to the imaging chip 250 from reflected light formed by finger reflection.
  • FIG. 9 is exemplified only by the filter 260 on the upper surface of the imaging chip 250, but the present application is not limited thereto.
  • the filter 260 can be attached to the bottom surface of the display, the surface of the prism, or the interior of the imaging chip 250, and the like.
  • FIG. 10 is a schematic structural view showing the filter 260 disposed in the lens barrel 220 in the embodiment of the present application.
  • the filter 260 may be located within the lens barrel 220.
  • the edge region of the lower surface of the lens 210 may extend downward to form a convex ring structure 226, the lower surface of the convex ring structure 226 and the filter.
  • the outer edge region of the convex ring structure 226 and the upper surface of the filter 260 are fixedly connected by a glue-bonding and fixing manner.
  • the number, position, and specific structure of the filter 260 shown in FIG. 9 are merely exemplary descriptions, which are not limited in this embodiment of the present application. For example, whether to add one or more of the filters 260 may be determined according to actual needs of the imaging chip 250.
  • the under-screen biometric device 200 further includes: a microlens array fixed on the upper surface of the imaging chip 250, and the microlens array is used to pass through the lens 210.
  • the optical signal is imaged to an imaging pixel unit of imaging chip 250.
  • the microlens array includes a plurality of hemispherical lenses or prisms distributed in an array, and since the hemispherical lens or the prism has a condensing effect, the receiving on the imaging chip 250 can be increased by adding a microlens array on the upper surface of the imaging chip 250. The amount of semaphores.
  • the screen biometric device 200 in the embodiment of the present application can be compatible with and adapted to the mechanical structure of the imaging chip 250 integrated with the microlens array and the imaging chip 250 without the microlens array, which is more flexible in structure. .
  • each of the imaging pixel units in the imaging chip 250 corresponds to one of the microlens arrays.
  • the microlens in the microlens array is a hemispherical lens
  • the imaging pixel unit is a polygon
  • the diameter of the hemispherical lens is the length of the long side of the polygon.
  • FIG. 11 is a schematic structural diagram of an imaging chip integrated with a microlens array according to an embodiment of the present application. As shown in FIG. 11, when the imaging pixel unit is square, the hemispherical lens is directly about the square. Side length. For example, the side length of the imaging pixel unit and the diameter of the hemispherical lens are both 5 um.
  • the hemispherical lens on the imaging chip 250 may have a thickness of 5 um, but a 5 um thick hemispherical lens is not shown in the module drawings of the millimeter thickness. That is, the microlens array 251 shown in FIG. 10 is merely an example, and the embodiment of the present application is not limited thereto.
  • the dimensions of the various components in the embodiments of the present application such as the thickness, the length and the width, and the overall thickness, length and width of the under-screen biometric device are merely illustrative and should not be addressed. This application constitutes any limitation.
  • the under-the-screen biometric device 200 is not in direct contact with the display screen, that is, a separate design is adopted between the under-the-screen biometric device 200 and the display screen.
  • the bracket 230 in the screen biometric device 200 is fixed under the display screen by a fixing frame, and the distance between the upper surface of the display screen and the optical center of the lens 210 is satisfied. Imaging conditions.
  • the imaging condition may be the following optical imaging formula:
  • u denotes the object distance
  • v denotes the image distance
  • f denotes the focal length. That is, the reciprocal of the object distance plus the reciprocal of the image distance is equal to the reciprocal of the focal length.
  • the distance between the upper surface of the display screen and the optical center of the lens 210 is the object distance
  • the distance between the optical center of the lens 210 and the upper surface of the imaging chip 250 is the image distance.
  • the focal length of 210 is a fixed value.
  • the distance between the optical center of the lens 210 and the upper surface of the imaging chip 250 can be adjusted by adjusting the height of the lens barrel 220 by the auto-focusing machine to adjust the lens 210 and the imaging chip 250. The distance between them. Since the light received by the imaging chip 250 will contain fingerprint signals and screen internal structure signals. Therefore, in the embodiment of the present application, the weak intersection condition can be further formed by adjusting the focus of the lens 210, so that the imaging of the internal structure signal of the screen is blurred, but the imaging of the fingerprint signal is not affected.
  • the image distance in the above formula i.e., the distance between the optical center of the lens 210 and the upper surface of the imaging chip 250
  • the first imaging interface is offset by a distance to a second imaging interface, and the distance between the second imaging interface and the optical center of the lens 210 is defined as the image-corrected value, wherein
  • the first imaging interface is the clearest interface for imaging the fingerprint signal, and the internal structure signal of the screen affects the imaging of the fingerprint signal, so that the fingerprint imaging cannot meet the requirement of fingerprint recognition.
  • the distance that the first imaging interface is offset may be offset from the optical center of the lens 210, or may be offset from the optical center of the lens 210. Make a limit.
  • the first imaging interface may be offset by a distance of ⁇ 10 um to ⁇ 50 um. It should be noted that the range is only an exemplary range of the gap, and embodiments of the present application are not limited thereto.
  • the under-screen biometric device 200 may further include a foam 290 disposed on an upper surface of the bracket 230.
  • the foam 290 can be used to seal dust.
  • the under-the-screen biometric device 200 can be installed under the display screen by being fixedly connected to a device that is easily disassembled inside the terminal device.
  • the above-described easily detachable device can serve as a holder between the under-screen biometric device 200 and the display screen 320.
  • the under-the-screen biometric device 200 can be fixedly disposed under the display screen in a non-contact manner by other auxiliary components.
  • the under-the-screen biometric device 200 can be fixed to the holder and fixedly disposed below the display screen through the holder.
  • the screen biometric device 200 and the display screen may pass between The middle frame or other components of the mobile terminal are fixed below the display screen.
  • FIGS. 13 to 18 are schematic views of the bracket 230 disposed below the display screen 320 through the middle frame 370.
  • the under-screen biometric device 200 may be fixedly disposed below the display screen 220.
  • the display screen 320 may be the OLED display screen 120 as shown in FIG. 1 and FIG. 2
  • the screen-down biometric identification device 200 may be the screen-down biometric device 140 as shown in FIG. 1 and FIG. 2 .
  • it may include a lens 210, a lens barrel 220, a holder 230, an imaging chip 250, a filter 260, an FPC 270, a foam 290, and the like.
  • the under-screen biometric device 200 can be used to acquire fingerprints or other biometrics, and its biometric collection area is at least partially within the display area of the display screen 320 as shown.
  • biometric collection area is at least partially within the display area of the display screen 320 as shown.
  • the middle frame 370 is a frame of the electronic device disposed between the display screen 320 and the back cover and used to carry various internal components, and various internal components thereof include but are not limited to a battery, a motherboard, a camera, a cable, various sensors, and a microphone. , earpieces and other parts.
  • the middle frame 370 may be made of a metal or alloy material, or even a plastic material.
  • the middle frame 370 may even be integrally formed with the frame of the mobile terminal, which refers to the inner middle frame and the frame. It is a whole.
  • the border can be just a metal welt, or a metal-like paint can be applied to the middle frame.
  • the middle frame 370 may also be a composite middle frame, for example, including an inner middle frame and an outer middle frame, wherein the inner middle frame is for carrying a mobile phone component (for example, the bracket 230), and the outer middle frame is for the inner middle frame.
  • the outer edge of the outer middle frame is equipped with a mobile phone button, and the inner middle frame is integrated with the outer middle frame.
  • the gap may be determined by the manufacturer during commissioning of the biometric device 200, or may be specified by various manufacturers.
  • the gap may be the distance between the upper surface of the lens barrel 220 and the lower surface of the display screen 320, or may be the distance between the upper surface of the bracket 230 and the lower surface of the display screen 320.
  • a gap width of the gap between the screen biometric device 200 and the display screen 320 may be greater than or equal to a first distance, where the first distance is The minimum distance that the lens barrel 220 and the display screen 320 do not touch when the terminal device is in an oscillating state such as a drop or a collision.
  • the gap width may range from 0.3 mm to 1 mm. It should be noted that the range is only an exemplary range of the gap, and embodiments of the present application are not limited thereto.
  • the under-the-screen biometric device 200 can be easily disassembled inside the terminal device through a fixed connection. Any device is implemented to be mounted below the display screen 320, and a gap exists between the under-screen biometric device 200 and the display screen 320. As long as the above-described screen biometric device 200 can be fixedly disposed below the display screen 320 in a non-contact manner. In other embodiments, the under-the-screen biometric device 200 can also be fixed to a removable cover such as a back cover, a main board, and a battery of the mobile terminal, and further fixedly disposed below the display screen 320.
  • a removable cover such as a back cover, a main board, and a battery of the mobile terminal
  • the under-the-screen biometric device 200 is disposed under the display screen 320 in a non-contact manner and is not in contact with the lower surface of the display screen 320, that is, the under-the-screen biometric device 200 and the The display screen 320 is completely decoupled, avoiding damage to the display screen 320 when the under-the-screen biometric device 200 is disassembled.
  • the gap may be an air gap that does not fill any auxiliary material (air gap) ), which can ensure that the under-screen biometric device 200 does not touch the lower surface of the display screen 320 when the display screen 320 is pressed or the terminal device is dropped or collided, nor does it affect the Biometric recognition stability and performance of the under-screen biometric device 200.
  • the embodiment of the present application can reduce the difficulty of disassembling the under-the-screen biometric device 200 by separating the under-the-screen biometric device 200 from the lower surface of the display 320.
  • the maintainability of the terminal equipment Further, the complexity of installing the under-the-screen biometric device 200 under the display screen 320 during the production process of the under-screen biometric device can be reduced, and the under-the-screen biometric device can be improved. Production success rate, which in turn reduces production costs. Moreover, the biometric recognition stability and performance of the under-the-screen biometric device 200 are not affected.
  • the foam 290 is disposed between the upper surface of the bracket 230 and the lower surface of the middle frame 370.
  • the foam 290 can be used not only for sealing dust, but also for fitting the bracket 230 and the middle frame 370.
  • the positional relationship between the display screen 320 and the middle frame 370 is relatively fixed.
  • an edge region of the upper surface of the middle frame 370 is adhered to a lower surface of the display screen 320, and an upper surface of the middle frame 370 is attached. There may also be a gap between the area other than the edge and the display screen 320.
  • the edge region of the upper surface of the middle frame 370 and the lower surface of the display screen 320 can be understood as: the display screen 320 and the middle frame 370 pass through the lower surface of the display screen 320.
  • the edges are bonded to the edges of the upper surface of the middle frame 370 to be fixedly connected to each other.
  • the screen biometric device 200 when the screen biometric device 200 performs optical feature recognition, such as optical fingerprint recognition, the screen biometric device 200 needs to detect the light signal emitted by the display screen 320 through the finger. Reflected light formed by reflection.
  • the middle frame 370 is formed with an opening 371 in a mounting area of the under-the-screen biometric device 200, and the under-the-screen biometric device 200 is disposed at the The opening 371 is below the aperture 371, and its optical sensing array is disposed opposite the lower surface of the display screen 320 through the opening 371. Therefore, when the under-the-screen biometric device 200 is disposed on the lower surface of the middle frame 370, it can be ensured that the under-the-screen biometric device 200 can receive the reflected light through the opening 371.
  • the size of the opening 371 is not specifically limited in the embodiment of the present application.
  • the size of the opening 371 of the middle frame 370 can be less than or equal to the size of the under-the-screen biometric device 200.
  • the size of the opening 371 of the middle frame 370 may also be greater than or equal to the size of the lens barrel 220.
  • the size of the opening 371 of the middle frame 370 may be smaller than the size of the under-the-screen biometric device 200.
  • the size of the opening 371 of the middle frame 370 is larger than the size of the lens barrel 220, and the size of the opening 371 of the middle frame 370 is smaller than The size of the under-the-screen biometric device 200.
  • the lens barrel 220 may be partially accommodated in the opening 371 of the middle frame 370, and a buffer space may be formed between the lens barrel 220 and the middle frame 370, which may ensure that when the middle frame 370 is pressed or When the terminal device is dropped or collided, the lens barrel 220 does not contact the middle frame 370, and the biometric recognition stability and performance of the under-the-screen biometric device 200 are not affected.
  • the size of the opening 371 of the middle frame 370 may be larger than the size of the under-the-screen biometric device 200.
  • the under-the-screen biometric device 200 may be directly fixed on the middle frame 370.
  • a side surface of the under-the-screen biometric device 200 may be fixedly connected to a hole wall of the opening 371; or, the under-the-screen biometric device 200
  • the upper surface edge may be fixedly coupled to a region of the lower surface of the middle frame 370 located around the opening 371.
  • FIG. 13 and 14 are schematic structural views of a direct connection between the under-screen biometrics device 200 and the middle frame 370.
  • the upper surface edge of the under-the-screen biometric device 200 may be fixedly coupled to a region of the lower surface of the middle frame 370 that is located around the opening 371.
  • the upper surface of the bracket 230 and the middle frame are fixedly coupled to a region of the lower surface of the middle frame 370 located around the opening 371.
  • the manner in which the in-screen biometrics device 200 and the middle frame 370 are directly connected in a fixed manner is only an exemplary description, and the embodiment of the present application is not limited thereto.
  • the under-screen biometric device 200 can also be fixedly coupled to the middle frame 370 by a connector.
  • the under-the-screen biometric device 200 may further include: a module bracket 330, and the module bracket 330 may serve as the bracket 230 and the middle frame 370 The connection between the two is used to achieve a fixed connection between the two.
  • the side surface of the under-the-screen biometric device 200 may be fixedly connected to the inner surface of the module holder 330 or the upper surface of the biometric device 200.
  • the surface of the module holder 330 is fixedly connected to the lower surface of the module holder 330; and the outer surface of the module holder 330 is fixedly connected to the hole wall of the opening 371, or the upper surface of the module holder 330 and the lower portion of the middle frame 370
  • the area of the surface located around the opening 371 i.e., at the edge of the aperture
  • 15 to 18 are schematic structural views of the under-the-shelf biometric device 200 fixedly connected between the module holder 330 and the middle frame 370.
  • a side surface of the under-the-screen biometric device 200 may be fixed on an inner side surface of the module holder 330, and the screen creature
  • the upper surface edge of the feature recognition device 200 and the upper surface of the module holder 330 may be simultaneously fixed to a region where the lower surface of the middle frame 370 is located around the opening 371 (ie, at the edge of the opening).
  • a side surface of the bracket 230 may be fixed on an inner side surface of the module bracket 330, and an upper surface edge of the bracket 230 and the mold
  • the upper surface of the group holder 330 may be simultaneously fixed to a region where the lower surface of the middle frame 370 is located around the opening 371 (i.e., at the edge of the opening).
  • the size of the opening 371 of the middle frame 370 is larger than the size of the under-the-screen biometric device 200.
  • the biometric device 200 is secured to the middle frame 370 by a module holder 330.
  • the upper surface edge of the under-the-screen biometric device 200 is fixed to the lower surface of the middle frame 370 by the module holder 330.
  • the area around the opening 371 ie, at the edge of the aperture).
  • the upper surface edge of the bracket 230 is fixed to the lower surface of the middle frame 370 by the module bracket 330 around the opening 371.
  • the area ie at the edge of the orifice).
  • the upper surface of the module holder 330 can also be higher than the upper surface of the under-the-screen biometric device 200, and the on-screen biometric device can be ensured on the one hand. There is a gap between 200 and display 320.
  • the under-the-screen biometric device 200 can be at least one of the module holders 330. The surface is fixedly connected, and the contact area between the under-the-screen biometric device 200 and the module holder 330 is increased, and the screen biometric device 200 and the device are fixed by a double-sided tape fixing method or a glue fixing method. When the module holder 330 is fixedly connected, the stability of the fixed connection can be increased.
  • the fixed connection involved in the embodiments of the present application includes, but is not limited to, the following connection manners: a screw fixing method, a double-sided adhesive fixing method, a glue fixing method, a welding fixing method, and a coupling fixing manner.
  • module holder 330 the main function of the above-mentioned module holder 330 is to fixedly connect the under-the-screen biometric device 200 to the middle frame 370 and between the screen biometric device 200 and the display screen 320. There is a gap.
  • the position and/or specific structure of the module holder 330 shown in FIG. 14 is merely an example, and the embodiment of the present application is not limited thereto.
  • the module holder 330 may further be provided with a cavity structure, and the cavity structure Aligning with the opening 371 of the middle frame 370, which can provide a receiving space for the under-the-screen biometric device 200, and the under-the-screen biometric device 200 is at least partially received and fixed at the empty In the cavity structure.
  • the side surface of the under-the-screen biometric device 200 is fixedly connected to the inner side surface of the module holder 330 through the cavity structure.
  • the shape of the cavity structure may be The shape of the screen biometric device 200 is described.
  • the cavity structure can be further optimized. For example, a top edge of the cavity structure of the module holder 330 may extend inwardly to form an annular fixing portion, and an upper surface edge of the under-the-screen biometric device 200 may be fixed to the annular fixing portion. The lower surface of the annular fixing portion is flush with the upper surface of the main body of the module holder 330.
  • connection between the inside of the cavity structure and the module holder 330 can be made more stable by using the annular fixing portion of the module holder 330, and the module is more stable.
  • the upper surface of the group bracket 330 is higher than the upper surface of the under-the-screen biometric device 200, and the height difference between the two can further increase the difference between the display screen 320 and the under-the-screen biometric device 200. Gap width.
  • the middle frame 370 of the terminal device may adopt a metal middle frame or an aluminum alloy middle frame, and the thickness may be thin or thick to satisfy the between the display screen 320 and the under-the-screen biometric device 200.
  • the width of the gap is required. Therefore, in order to ensure that the gap between the under-the-screen biometric device 200 and the display screen 320 in the embodiment of the present application has a sufficient width.
  • the structural design of the middle frame 370 can be further optimized. The structure of the middle frame 370 of the present application embodiment will be exemplarily described below with reference to the accompanying drawings.
  • the installation area of the under-the-screen biometric device 200 on the middle frame 370 may be performed. Thickening treatment.
  • the middle frame 370 may be formed with an opening 371 at the above-mentioned mounting position, and the edge of the opening 371 of the middle frame 370 may further extend downward to form a fifth. Raised structure.
  • the under-the-screen biometric device 200 can be directly mounted or fixed to the lower surface of the fifth raised structure by the module holder 330.
  • the edge of the opening 371 of the middle frame 370 may further extend downward to form a convex ring, wherein the screen creature
  • the feature recognition device 200 may be located inside the convex ring after being mounted to the middle frame 370.
  • the under-screen biometric device 200 can also be fixed into the convex ring by the module holder 330.
  • the convex ring can ensure that the middle frame 370 has higher strength after being thinned in the peripheral region of the opening 371, and on the other hand, the under-the-screen biometric device 200 can also be performed on the inner side. protection.
  • the installation area of the under-the-screen biometric device 200 on the middle frame 370 may also be Perform thinning.
  • a lower surface of the middle frame 370 may be provided with a groove structure in a surrounding area of the opening 371.
  • the under-the-screen biometric device 200 can be mounted directly or secured to the recess structure by a module bracket 330.
  • the lower surface of the middle frame 370 is extended upward at an edge of the opening facing away from the display screen 320 to form a groove structure, and the under-the-screen biometric device 200 passes.
  • the module holder 320 is fixed within the groove structure.
  • the upper surface of the middle frame 370 may be thinned at a peripheral region of the opening 371.
  • the upper surface of the middle frame 370 is formed with a third stepped structure in the edge region of the opening 371. That is, the thickness of the middle frame 370 in the peripheral region of the opening 371 is smaller than the thickness of the main body of the middle frame 370.
  • the height difference of the third step structure may also be used as a part of the gap between the display screen 320 and the under-the-screen biometric device 200.
  • the upper surface of the middle frame 370 is formed with a third step structure in an edge region of the opening 371, and the middle frame 370
  • the lower surface may have a groove structure in a peripheral region of the opening 371.
  • the opening 371 of the middle frame 370 may be chamfered toward the edge of the display screen 320 to form a bevel.
  • the oblique angle may be more favorable for the reflected light to enter the under-the-screen biometric device 200 from the opening 371 of the middle frame 370, thereby improving the biometric detection performance and the detection efficiency of the under-the-screen biometric device. .
  • the oblique angle extends to an edge of the lower surface of the middle frame facing away from the aperture of the display screen, such that the gap includes the oblique angle The projection height of the face in the direction perpendicular to the display screen.
  • the under-the-screen biometric device 200 when the under-the-screen biometric device 200 is applied to a terminal device, it may further include: a cover plate 310.
  • the cover plate 310 may be a transparent protective cover, such as a glass cover or a sapphire cover, which may cover the display screen 120, and the lower surface of the cover plate 310 may be opposite to the display screen 320.
  • the upper surface ie, the display surface
  • the display screen 320 and the cover plate 310 may be connected by an adhesive layer or may be connected by other connection methods, which is not limited in this embodiment of the present application.
  • the screen biometric device 200 can be fixed on the middle frame 370 or the back cover structure.
  • the problem that the current screen biometric device directly attaches the screen biometric device 200 to the display screen 320 is difficult to disassemble, the display screen 320 is easily damaged, and the process is difficult to be attached.
  • a gap is formed between the under-the-screen biometric device 200 and the lower surface of the display screen 320, and the gap can ensure that the display screen 320 is pressed or when the terminal is Under the condition that the device is dropped or collided, the under-screen biometric device 200 does not touch the lower surface of the display screen 320 to avoid damage to the display screen 320.
  • FIG. 13 to FIG. 18 are only examples in which the under-the-spot biometric device 200 is attached to the lower surface of the middle frame 370, and the embodiment of the present application is not limited thereto.
  • the under-screen biometric device 200 can be disposed on the upper surface or inside of the middle frame 370 and maintain the screen between the biometric device 200 and the display screen 320.
  • a gap having a predetermined width may be formed with a groove structure, and the under-the-screen biometric device 200 may be fixed in the groove structure, and the groove structure may be used for
  • the under-screen biometric device 200 provides an accommodation space.
  • the under-screen biometric device 200 shown in FIGS. 17 and 18 may also be mounted inside the opening 331 of the module holder 330, such as the outer surface of the under-the-screen biometric device 200. It may be fixed to the inner side of the opening 331.
  • the embodiment of the present application does not limit the connection manner between the components in the screen biometric device 200.
  • the above-mentioned screen biometric device 200 may also be referred to as a biometric module.
  • Photodetector arrays may also be referred to as photosensor arrays that can transmit light from lens 220.
  • the photosensor array can employ an array of photodiodes through which the optical signals are converted into electrical signals so that imaging can be performed based on the electrical signals.
  • a biometric identification component is further provided, which may include an off-screen biometric device and a module support; when the biometric component is applied to the on-screen biometric device as described above or When the terminal device is installed, it may be directly installed to the middle frame or the fixed frame of the terminal device, and may be damaged when the under-the-screen biometric device or the under-the-screen biometric device of the terminal device is damaged. The biometric component is replaced, thereby further reducing the complexity of repairing and replacing the off-screen biometric device and avoiding damage to the display.
  • the embodiment of the present application further provides an electronic device, which may include a display screen and the above-described screen biometric identification device in various embodiments of the present application, where the under-the-screen biometric device is disposed on a display screen. Below, and the distance between the upper surface of the display screen and the optical center of the lens in the under-the-screen biometric device meets the imaging conditions. .
  • the electronic device can be any electronic device having a display screen, which implements the on-screen biometric recognition by using the technical solution of the embodiment of the present application.
  • the display screen may be an organic light emitting diode display screen comprising a plurality of organic light emitting diode light sources, wherein the under-screen biometric identification device employs at least a portion of the organic light emitting diode light source as an excitation light source for biometric recognition.
  • the disclosed system and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives 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 physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the storage medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

提供了一种的屏下生物特征识别装置和电子设备，该屏下生物特征识别装置包括：镜头，设置在显示屏的下方，用于接收来自所述显示屏上方的经由人体手指反射形成的光信号，其中所述光信号用来检测所述手指的生物特征信息；镜筒，所述镜头固定在所述镜筒内；支架，所述支架和所述镜筒之间通过螺纹连接的方式进行连接，所述支架用于支撑所述镜筒。本申请实施例提供的屏下生物特征识别装置和电子设备，能够提升屏下生物特征识别的效率。

Description

屏下生物特征识别装置和电子设备
本申请要求于2018年02月06日提交中国专利局、申请号为PCT/CN2018/075450、发明名称为“屏下生物特征识别装置、生物特征识别组件和终端设备”的国际专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及生物特征识别领域，并且更具体地，涉及屏下生物特征识别装置和电子设备。
背景技术
随着手机行业的高速发展，生物识别技术越来越受到人们重视，更加便捷的屏下生物特征识别技术，例如屏下指纹识别技术的实用化已成为大众所需。
目前，屏下光学指纹识别技术主要包括基于周期性微孔阵列的屏下光学指纹识别技术和基于一体式的微透镜屏下光学指纹识别技术。前一种光学指纹识别技术容易受到莫尔条纹的影响，并且需要将光学指纹识别模组贴在OLED屏下，工序复杂。后一种屏下光学指纹识别技术的指纹识别模组是一体式的，其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。由于上述各种问题的存在，影响了屏下生物特征识别的效率。
因此，如何提升屏下生物特征识别的效率，成为一个亟待解决的技术问题。
发明内容
提供了一种的屏下生物特征识别装置和电子设备，能够提升屏下生物特征识别的效率。
第一方面，提供了一种屏下生物特征识别装置，包括：
镜头，设置在显示屏的下方，用于接收来自所述显示屏上方的经由人体手指反射形成的光信号，其中所述光信号用来检测所述手指的生物特征信 息；
镜筒，所述镜头固定在所述镜筒内；
支架，所述支架和所述镜筒之间通过螺纹连接的方式进行连接，所述支架用于支撑所述镜筒。
在一些可能的实现方式中，所述镜筒和所述支架之间形成有点胶结构，所述镜筒和所述支架之间的螺纹连接通过在所述点胶结构内进行点胶的方式进行固定。
在一些可能的实现方式中，所述点胶结构包括：所述支架的上表面在螺纹孔的外围区域向下延伸形成的第一台阶结构。
在一些可能的实现方式中，所述镜头包括非球面透镜或非球面透镜组。
在一些可能的实现方式中，所述支架的下表面在螺纹孔的外围区域向下延伸形成有第一凸起结构，所述镜头安装在所述第一凸起结构内。
在一些可能的实现方式中，所述支架的下表面在所述第一凸起结构和所述支架的边缘之间形成有第二凸起结构。
在一些可能的实现方式中，所述镜筒的上表面在筒口处向内延伸形成第三凸起结构，所述第三凸起结构用于固定所述镜头。
在一些可能的实现方式中，所述镜筒的上表面在筒口处通过倒角处理形成有斜角，使得所述镜筒在上表面处的内径大于所述镜筒在所述第三凸起结构处的内径。
在一些可能的实现方式中，所述镜筒的内侧表面在所述第三凸起结构的下方形成有第二台阶结构，所述镜头通过所述第二台阶结构固定在所述镜筒内。
在一些可能的实现方式中，所述镜筒的外侧表面在所述第三凸起结构的下方形成第五凸起结构，所述第五凸起结构上形成有外螺纹。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
成像芯片，所述成像芯片设置在镜筒的下方，所述成像芯片用于基于穿过所述镜头的光信号进行成像，其中，所述镜头与所述成像芯片之间的距离通过旋转所述镜筒进行调整。
在一些可能的实现方式中，所述镜头的光学中心与所述成像芯片的上表面之间的距离等于所述镜头的成像距离。
在一些可能的实现方式中，所述镜筒的上边表在边缘区域向外延伸形成 有至少一个第五凸起结构，所述第五凸起结构用于旋转所述镜筒，以调整所述镜头与所述成像芯片之间的距离。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
光学滤波片，所述光学滤波片位于所述镜头的和所述成像芯片之间。
在一些可能的实现方式中，所述光学滤波片固定在所述成像芯片的上表面。
在一些可能的实现方式中，所述光学滤波片固定在所述镜筒内。
在一些可能的实现方式中，所述镜头的下表面的边缘区域向下延伸形成有凸环结构，所述凸环结构的下表面与所述滤波片接触，所述凸环结构的外侧边缘区域与所述滤波片的上表面通过胶材贴合固定方式进行固定连接。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
微透镜阵列，所述微透镜阵列固定在所述成像芯片的上表面，所述微透镜阵列用于将穿过所述镜头的光信号成像到所述成像芯片的成像像素单元。
在一些可能的实现方式中，所述成像芯片中的每一个成像像素单元对应有所述微透镜阵列中的一个微透镜。
在一些可能的实现方式中，所述微透镜阵列中的微透镜为半球透镜，所述成像像素单元为多边形，所述半球透镜的直径为所述多边形的长边的长度。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
柔性印制电路板，所述成像芯片固定在所述柔性印制电路板的上表面，所述支架的下表面与所述柔性印制电路板的上表面的在所述成像芯片的边缘区域固定连接。
在一些可能的实现方式中，所述支架形成有排气孔，所述排气孔用于调整所述支架和所述柔性印制电路板形成的内部空间的气压强度。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
钢板，所述钢板固定在所述柔性印制电路板的下表面。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
固定架，所述支架通过所述固定架固定在所述显示屏的下方，并使得所述显示屏的上表面与所述镜头光学中心之间的距离满足成像条件。
在一些可能的实现方式中，所述屏下生物特征识别装置应用于电子设备，所述固定架为所述电子设备的中框，所述中框用于支撑所述显示屏。
在一些可能的实现方式中，
在一些可能的实现方式中，所述中框与所述支架通过以下安装方式中的任一种进行的安装固定：螺钉安装固定方式、胶材贴合固定方式、焊接固定方式以及耦合固定方式。
在一些可能的实现方式中，所述中框形成有开孔，所述镜筒至少部分容纳在所述开孔内，所述镜筒外侧和所述开孔的内侧之间存在间隙。
在一些可能的实现方式中，所述中框的上表面在所述开孔边缘通过倒角处理形成有斜角，所述斜角使得所述中框上表面的开孔宽度大于所述中框下表面的开孔宽度。
在一些可能的实现方式中，所述中框的上表面在所述开孔的边缘区域形成有第三台阶结构。
在一些可能的实现方式中，所述中框的下表面在所述开孔的外围区域向下延伸形成有第五凸起结构，所述支架安装在所述第五凸起结构的内部。
在一些可能的实现方式中，所述中框的下表面在所述开孔的边缘区域向上延伸形成槽结构，所述支架安装在凹槽结构内。
在一些可能的实现方式中，所述屏下生物特征识别装置还包括：
泡棉，所述泡棉设置于所述支架的上表面和所述中框的下表面之间。
第二方面，提供了一种电子设备，包括：
第一方面所述的屏下生物特征识别装置。
在一些可能的实现方式中，所述电子设备还包括：
显示屏，所述屏下生物特征识别装置设置在所述显示屏的下方，并使得所述显示屏的上表面与所述屏下生物特征识别装置中的镜头的光学中心之间的距离满足成像条件。
一方面，本申请实施例中支架和镜筒之间的螺纹连接方式使得在组装所述屏下生物特征识别装置140的过程中，可以通过调焦的方式来实现期望的光学成像，进而降低了对加工工艺的要求，也解决了一体式模组在生产组装过程中的批次性的良率问题和一体式模组的最佳焦距不能精确对准的问题，从而提升屏下生物特征识别的效率。
另一方面，避免了将光学指纹识别模组贴在显示屏的下表面，只需要将屏下生物特征识别装置140设置在显示屏的下方即可，例如，将所述镜头设置在所述显示屏的下方，有效简化了屏下生物特征识别装置140的安装工序， 提升了屏下生物特征识别装置140的安装过程中的批次性的良率，降低了屏下生物特征识别装置140的更换过程中的损坏率，进而有效降低了成本。
附图说明
图1是本申请可以适用的移动终端的平面示意图。
图2是图1所示的移动终端沿A’-A’的部分剖面示意图。
图3为屏下生物特征识别装置的定向视图。
图4是图3所示屏下生物特征识别装置中支架的定向视图。
图5是图3所示屏下生物特征识别装置中镜筒的定向视图。
图6是图3所示的屏下生物特征识别装置沿B’-B’的部分剖面结构示意图。
图7是本申请实施例的屏下生物特征识别装置的定向视图。
图8是图7所示的屏下生物特征识别装置中的滤波片、成像芯片、电路板以及图像处理器的定向视图。
图9是图7所示屏下生物特征识别装置沿C’-C’的部分剖面结构示意图。
图10是本申请实施例的滤波片位于镜筒内的示意性结构图。
图11是本申请实施例的具有微透镜阵列的成像芯片的示意性结构图。
图12是本申请实施例的屏下生物特征识别装置的支架的上表面贴有泡棉的定向视图。
图13至图18是本申请实施例的屏下生物特征识别装置位于显示屏下方的示意性结构图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
随着智能终端步入全面屏时代，电子设备正面生物特征采集区域受到全面屏的挤压，因此屏下(Under-display或者Under-screen)生物特征识别技术越来越受到关注。屏下生物特征识别技术是指将屏下生物特征识别装置(比如指纹识别模组)安装在显示屏下方，从而实现在显示屏的显示区域内部进行生物特征识别操作，不需要在电子设备正面除显示区域外的区域设置生物特征采集区域。
屏下生物特征识别技术可以包括屏下光学生物特征识别技术、屏下超声 波生物特征识别技术或者其他类型的屏下生物特征识别技术。
以屏下光学生物特征识别技术为例，屏下光学生物特征识别技术使用从设备显示组件的顶面返回的光来进行指纹感应和其他感应操作。所述返回的光携带与所述顶面接触的物体(例如手指)的信息，通过捕获和检测所述返回的光实现位于显示屏幕下方的特定光学传感器模块。所述特定光学传感器模块的设计可以为通过恰当地配置用于捕获和检测返回的光的光学元件来实现期望的光学成像。
应理解，本申请实施例的技术方案可以应用于各种电子设备，更具体地，可以应用于具有显示屏的电子设备。例如智能手机、笔记本电脑、平板电脑、游戏设备等便携式或移动计算设备，以及电子数据库、汽车、银行自动柜员机(Automated Teller Machine，ATM)等其他电子设备，但本申请实施例对此并不限定。
还应理解，本申请实施例的技术方案除了可以进行指纹识别外，还可以进行其他生物特征识别，例如，活体识别等，本申请实施例对此也不限定。
图1和图2示出了屏下生物特征识别装置可以适用的电子设备100的示意图，其中图1为屏下生物特征识别装置可以适用的电子设备100的正面示意图，图2是图1所示的电子设备100沿A’-A’的部分剖面结构示意图。
如图1和图2所示，电子设备100可以包括显示屏120和屏下生物特征识别装置140，其中，所述显示屏120具有显示区域102，所述屏下生物特征识别装置140设置在所述显示屏120的下方。
显示屏120可以为自发光显示屏，其采用具有自发光显示单元的作为显示像素。比如显示屏120可以为有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏或者微型发光二极管(Micro-LED)显示屏。在其他替代实施例中，显示屏120也可以为液晶显示屏(Liquid Crystal Display,LCD)或者其他被动发光显示屏，本申请实施例对此不做限制。
显示屏120具体可以为触控显示屏，其不仅可以进行画面显示，还可以检测用户的触摸或者按压操作，从而为用户提供一个人机交互界面。比如，在一种实施例中，所述电子设备100可以包括触摸传感器，所述触摸传感器可以具体为触控面板(Touch Panel,TP)，其可以设置在所述显示屏120表面，也可以部分集成或者整体集成到所述显示屏120内部，从而形成所述触控显示屏。
屏下生物特征识别装置140可以为光学屏下生物特征识别装置，其可以包括具有光学感应阵列的光学生物特征传感器，比如光学指纹传感器；所述光学感应阵列包括多个光学感应单元，且所述光学感应阵列的所在区域为所述屏下生物特征识别装置140的生物特征采集区域，所述多个光学感应单元用于采集用户的指纹特征信息(比如指纹图像信息)。
屏下生物特征识别装置140可以至少设置在显示屏120下方的局部区域，从而使得所述屏下生物特征识别装置140的生物特征采集区域(或感应区域)至少部分位于所述显示屏120的显示区域102内。
如图1所示，所述生物特征采集区域130位于所述显示屏120的显示区域102之中。由此，用户在需要对所述电子设备进行解锁或者其他生物特征验证的时候，只需要将手指按压在位于所述显示屏120的生物特征采集区域130，便可以实现生物特征的输入操作。由于生物特征采集检测可以在所述显示屏120的显示区域102内部实现，采用上述结构的电子设备100无需其正面专门预留空间来设置指纹按键(比如Home键)，因而可以采用全面屏方案，即所述显示屏120的显示区域102可以基本扩展到所述电子设备100的整个正面。
在生物特征识别过程中，以显示屏120采用OLED显示屏为例，所述显示屏120具有呈阵列式排布的OLED显示单元，所述屏下生物特征识别装置140可以利用所述OLED显示屏120位于所述生物特征采集区域130的OLED显示单元(即OLED光源)来作为生物特征检测识别的激励光源。当然，应当理解，在其他替代实现方案中，所述屏下生物特征识别装置140也可以采用内置光源或者外置光源来提供用于进行生物特征检测识别的光信号，在这种情况下，所述屏下生物特征识别装置不仅可以适用于如OLED显示屏等自发光显示屏，还可以适用于非自发光显示屏，比如液晶显示屏或者其他的被动发光显示屏。并且，所述屏下生物特征识别装置140的光学感应阵列具体可以为光探测器(Photo detector)阵列(或称为光电探测器阵列)，其包括多个呈阵列式分布的光探测器或光电探测器，所述光探测器或光电探测器可以作为如上所述的光学感应单元。
当手指触摸、按压或者接近(为便于描述，本申请统称为按压)在所述生物特征采集区域130时，所述生物特征采集区域130的显示单元发出的光线在手指发生反射并形成反射光，其中所述反射光可以携带有用户手指的指 纹特征信息。比如，所述光线在用户手指表面的指纹发生反射之后，由于手指指纹的纹脊和纹谷的反射光是不同的，因此反射光便携带有用户的指纹信息。所述反射光返回所述显示屏120并被其下方的屏下生物特征识别装置140的光探测器阵列所接收并且转换为相应的电信号，即生物特征检测信号。所述电子设备100基于所述生物特征检测信号便可以获得用户的生物特征信息，并且可以进一步进行生物特征匹配验证，从而完成当前用户的身份验证以便于确认其是否有权限对所述电子设备100进行相应的操作。
在其他替代实施例中，所述屏下生物特征识别装置140也可以设置在所述显示屏120下方的整个区域，从而将所述生物特征采集区域130扩展到整个所述显示屏120的整个显示区域102，实现全屏生物特征识别。
应当理解的是，在具体实现上，所述电子设备100还可以包括保护盖板110，所述保护盖板110可以具体为透明盖板，比如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100的正面，且所述保护盖板110表面还可以设置有保护层。因此，本申请实施例中，所谓的手指按压所述显示屏120可以实际上可以是指手指按压在所述显示屏120上方的盖板110或者覆盖所述盖板110的保护层表面。
在一种实现方式中，屏下生物特征识别装置140可以采用周期性微孔阵列将光线传输到感应阵列上，这需要将光学指纹识别模组贴在OLED屏下，工序复杂且成本过高。在另一种实现方式中，屏下生物特征识别装置140可以采用一体式的微透镜将光线传输到感应阵列上，所述一体式的微透镜是指将微透镜和感应阵列设计为一个整体进而形成一体式模组，由于一体式模组在量产过程中对精度要求非常高，一般的加工工艺满基本足不了实际需求。
为了解决上述技术问题，本申请实施例提供了一种改进的技术方案。具体地，屏下生物特征识别装置140采用镜头将光线传输到感应阵列上。更具体地，屏下生物特征识别装置140可以包括支架和内置有镜头的镜筒，所述镜头设置在显示屏的下方，所述镜头用于接收来自显示屏上方的经由人体手指反射形成的光信号，其中所述光信号用来检测所述手指的生物特征信息；例如，所述光信号可以是如上所述携带有所述手指的指纹信息的反射光，其可以用来检测所述手指的指纹信息。所述支架和所述镜筒之间通过螺纹连接的方式进行连接，所述支架用于支撑所述镜筒。
需要注意的是，在某些场景下，本申请实施例中的所述镜头需要被配置 为比用于拍照的前置摄像头的组装工艺更精准、体积更小的用于调制光的元件或器件，以达到屏下光学指纹精准对焦的要求。
本申请实施例的技术方案相对前一种实现方式(采用周期性微孔阵列将光线传输到感应阵列上)，避免了将光学指纹识别模组贴在显示屏的下表面，只需要将屏下生物特征识别装置140设置在显示屏的下方即可，例如，将所述镜头设置在所述显示屏的下方，有效简化了屏下生物特征识别装置140的安装工序，提升了屏下生物特征识别装置140的安装过程中的批次性的良率，降低了屏下生物特征识别装置140的更换过程中的损坏率，进而有效降低了成本。
而本申请实施例的技术方案相对后一种实现方式(采用一体式的微透镜将光线传输到感应阵列上)，支架和镜筒之间的螺纹连接方式使得在组装所述屏下生物特征识别装置140的过程中，可以通过调焦的方式来实现期望的光学成像，进而降低了对加工工艺的要求，有效解决了一体式模组在量产过程中对精度要求过高的问题，进而也解决了一体式模组在生产组装过程中的批次性的良率问题，解决了一体式模组的最佳焦距不能精确对准的问题，从而提升屏下生物特征识别的效率。
下面将结合图3至图5，对本申请实施例中的屏下生物特征识别装置300进行清楚地描述。需要说明的是，为便于说明，在本申请的实施例中，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。
图3至图13示出了屏下生物特征识别装置200的示意图，其中图3为屏下生物特征识别装置200的定向视图。图4是图3所示屏下生物特征识别装置200中支架230的定向视图。图5是图3所示屏下生物特征识别装置200中镜筒220的定向视图。图6是图3所示的屏下生物特征识别装置200沿B’-B’的部分剖面结构示意图。
如图3至图6所示，屏下生物特征识别装置200可以包括：镜头210、镜筒220和支架230。其中，镜头210设置在显示屏的下方，镜头210用于接收来自显示屏上方的经由人体手指反射形成的光信号。例如，所述显示屏发出的光在所述显示屏的上方被手指反射后，一部分反射光可以被镜头210接收。镜头210固定在镜筒220内。支架230和镜筒220之间通过螺纹连接的方式进行连接，支架230用于支撑镜筒220。
其中，所述显示屏可以为图1和图2所示的显示屏，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。
可选地，在本申请一个实施例中，镜头210可以包括非球面透镜或非球面透镜组，以减小指纹图像的成像畸变。
需要注意的是，所述非球面透镜或所述非球面透镜组的焦距可以比用于拍照用的前置摄像头的焦距小或所述镜头210为微距镜头，以达到屏下指纹识别的要求。例如，所述微距镜头的焦距范围可以为0.5mm-1.8mm。应注意，所述范围仅为所述间隙的示例范围，本申请实施例不限于此。例如，所述微距镜头的焦距也可以是2mm。
在组装所述屏下生物特征识别装置200的过程中，可以通过自动调焦机器调整镜筒220的高度来实现期望的光学成像。
为了保证能够将对高度调整完成后的镜筒220稳定的固定在支架230上。可选地，在本申请一个实施例中，镜筒220和支架230之间可以形成有点胶结构，镜筒220和支架230之间的螺纹连接通过在点胶结构内进行点胶的方式进行固定。例如，如图3至图6所示，所述点胶结构可以包括支架230的上表面在螺纹孔的外围区域向下延伸形成的第一台阶结构231，其可以为胶水提供一个容纳空间，由此可以通过在第一台阶结构231提供的容纳空间内以点胶的方式固定连接镜筒220和支架230。
应理解，第一台阶结构231可以包括一个或多个台阶。本申请实施例不做具体限定。例如，如图3至图6所示，第一台阶结构231包括两个台阶。
还应理解，第一台阶结构231沿支架230的上表面的螺纹孔可以是连续的也可以是离散的。本申请实施例不做具体限定。例如，如图3至图6所示，第一台阶结构231沿支架230的上表面的螺纹孔呈现为凹环。
可选地，在本申请一个实施例中，可以对支架230的下表面在螺纹孔的外围区域进行加厚处理，以增加支架230和镜筒220之间的螺纹连接的可靠度。例如，如图3至图6所示，支架230的下表面在螺纹孔的外围区域向下延伸形成有第一凸起结构233，镜头210安装在第一凸起结构233内。具体地，第一凸起结构233沿支架230的下表面的螺纹孔可以是连续的也可以是离散的，本申请实施例不做具体限定。
可选地，在本申请一个实施例中，还可以对支架230中的厚度较薄的部分区域进行加厚处理，以加强支架230的强度。例如，如图3至图6所示， 支架230的下表面在第一凸起结构233和支架230的边缘之间形成有第二凸起结构234。具体地，第二凸起结构234在某一方向上可以是连续的也可以是离散的，本申请实施例不做限定。
为了保证能够将镜头210稳定的固定在镜筒220内。可选地，在本申请一个实施例中，可以在镜筒220的上表面的筒口处设置用于阻止镜头210向上进行移动的结构。例如，如图3至图6所示，镜筒220的上表面在筒口处向内延伸形成第三凸起结构222，第三凸起结构222用于固定镜头210。可选地，在本申请的另一个实施例中，为了阻止镜头210向下移动，镜筒220的内侧表面和镜头210之间可以通过胶材贴合固定方式进行固定。
可选地，在本申请一个实施例中，第三凸起结构222的上表面可以被设计成特定结构，例如漏斗结构或者斜面结构，以使得来自显示屏的经由人体手指反射的光信号尽可能多的穿过第三凸起结构222，进而增加镜头210接收的信号量。例如，如图3至图6所示，镜筒220的上表面在筒口处通过倒角处理形成有斜角，使得镜筒220在上表面处的内径大于镜筒220在第三凸起结构222处的内径。
可选地，在本申请一个实施例中，镜筒220的内侧表面和镜头之间可以设置额外的用于容纳胶水的空间，以增加镜筒220的内侧表面和镜头210之间贴合的可靠度。例如，如图3至图6所示，镜筒220的内侧表面在第三凸起结构222的下方形成有第二台阶结构223，镜头210通过第二台阶结构223固定在镜筒220内。具体地，第二台阶结构223可以极大程度的增加胶水的容纳空间。
可选地，在本申请一个实施例中，还可以进一步对镜筒220的筒壁进行加厚处理，以增加镜筒220的筒体强度。例如，如图3至6所示，镜筒220的外侧表面在第三凸起结构222的下方可以形成由第四凸起结构224，第四凸起结构224上形成有外螺纹。采用这种设计结构，不仅能够增加镜筒220的筒体强度，还能够进一步增大胶水的容纳空间，将镜筒220更稳定的固定在支架230上。
可选地，在本申请一个实施例中，镜筒220的上表面可以形成有用于自动调焦机器进行调焦操作的结构。例如，镜筒220的上边表在边缘区域向外延伸形成有至少一个第五凸起结构221，第五凸起结构221用于旋转镜筒220，以调整镜头210与成像芯片250之间的距离。应理解，所述第五凸起 结构221在某一方向上可以是连续的也可以是离散的，本申请实施例不做限定。例如，如图3至图6所示，至少一个第五凸起结构221为四个突出的花瓣。
应当理解的是，在具体实现上，所述镜头210、镜筒220以及支架230还可以设计有其他结构。例如，如图3至图6所示，镜头210还可以设计有镜头210的尺寸标记(a)225，镜筒220还可以设计有镜筒220的尺寸标记(A1)236和装机用的沉孔235。例如，如图3至图6所示，所述沉孔不同的厂家可以使用不同的孔径和孔深。又例如，如图3和图4所示，支架230还可以设计有用于固定支架230的孔237，例如螺纹固定孔。
图7至图9为本申请实施例的屏下生物特征识别装置200的示意图。其中图7是集成有滤波片260、成像芯片250、电路板以及图像处理器280的屏下生物特征识别装置200的定向视图，图8是图7所示的屏下生物特征识别装置200中的滤波片260、成像芯片250、电路板以及图像处理器280的定向视图。图9是图7所示屏下生物特征识别装置200沿C’-C’的部分剖面结构示意图。
本申请实施例中，来自显示屏上方的经由人体手指反射形成的光信号经过镜头210进行调制后可以用于指纹图像的成像。
可选地，在本申请一个实施例中，如图7至图9所示，屏下生物特征识别装置200还可以包括：
成像芯片250，成像芯片250设置在镜筒220的下方，成像芯片250用于基于穿过镜头210的光信号进行成像，其中，镜头210与成像芯片250之间的距离通过旋转镜筒220进行调整。换句话说，可以通过调整镜筒220的高度调整镜头210与成像芯片250之间的距离。
可选地，在本申请一个实施例中，镜头210的光学中心与成像芯片250的上表面之间的距离等于镜头210的成像距离。具体地，在组装所述屏下生物特征识别装置200的过程中，可以通过自动调焦机器调整镜筒220的高度来实现调整镜头210与成像芯片250之间的距离，以实现期望的指纹图像的成像。
可选地，镜头210的成像距离可以大于镜头210的焦距。
应理解，上述镜头210与成像芯片250之间的距离可以是镜头210的光学中心与成像芯片250上表面之间的距离，其中，镜头210的光学中心为镜 头210中的一个特殊点，凡是通过所述特殊点的光，其传播方向不变。镜头210的光学中心又称为镜头210的光心(Optical center)。
本申请实施例中，成像芯片250接收经过镜头210调制后的光信号并基于接收的光信号获取生物特征检测信号(例如指纹图像)，所述生物特征检测信号用于进行指纹识别。换句话说，成像芯片250首先接收经过镜头210调制后的光信号并基于接收的光信号进行成像，以生成指纹图像；然后，将所述指纹图像发送给图像处理器，以便所述图像处理器进行图像处理并得到指纹信号；最后，通过算法对所述指纹信号进行指纹识别。
可选地，在本申请一个实施例中，屏下生物特征识别装置200还可以包括用于传输信号的电路板，例如，如图7至图9所示，所述电路板可以为软性电路板(Flexible Printed Circuit，FPC)270。
成像芯片250可以通过焊盘焊接到FPC 270，并通过所述FPC 270实现与其他外围电路或者如图1或图2所示的电子设备100的其他元件的电性互连和信号传输。比如，所述成像芯片250可以通过所述FPC 270接收所述电子设备100的处理单元的控制信号，并且还可以通过所述FPC 270将所述生物特征检测信号(例如指纹图像)输出给所述电子设备100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，屏下生物特征识别装置200还包括钢板，钢板固定在柔性印制电路板的下表面。
可选地，在本申请一个实施例中，如图7至图9所示，屏下生物特征识别装置200还可以包括图像处理器280，所述图像处理器180用于接收来自FPC 270发送的生物特征检测信号(例如指纹图像)，并基于所述生物特征检测信号进行指纹识别。
可选地，在本申请一个实施例中，如图9所示，所述成像芯片250固定在FPC 270的上表面，支架230的下表面与FPC 270的上表面的在成像芯片250的边缘区域固定连接。
如图7至图9所示，由于支架230固定在FPC 270的上表面时，支架230和FPC 270支架会形成一个封闭的空间，为例避免由于这个封闭空间的压强过大或过小影响屏下生物特征识别装置200的稳定性。
可选地，在本申请一个实施例中，如图7至图9所示，支架230形成有排气孔232，排气孔232用于调整支架230和FPC 270形成的内部空间的气 压强度。
本申请实施例中，穿过镜头210的光信号到达成像芯片250之前，还可以通过光学滤波器对其进行滤波，以滤除不需要的光。
可选地，如图7至图9所示，作为本申请的一个实施例，屏下生物特征识别装置200还包括光学滤波片260，光学滤波片260位于镜头210的和成像芯片250之间。
滤波片260用于来减少指纹感应中的不期望的背景光，以提高成像芯片250对接收到的光的光学感应。所述滤波片260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，如果一个或多个光学过滤器或光学过滤涂层可以设计为过滤波长从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，滤光片260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。当在室外使用所述屏下生物特征识别装置200时，这种光学过滤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260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成像芯片250的光学路径上。
图9仅以所述滤光片260在成像芯片250的上表面上为例，但本申请不限于此。例如，所述滤光片260可以贴合在包括显示器底面、棱镜表面或所述成像芯片250的内部等。
图10是本申请实施例的将滤光片260设置于镜筒220内的示意性结构图。如图10所示，所述滤波片260可以位于镜筒220内。这种情况下，为了增加滤波片260在镜筒220内的稳定性，所述镜头210的下表面的边缘区域可以向下延伸形成有凸环结构226，凸环结构226的下表面与滤波片260接触，凸环结构226的外侧边缘区域与滤波片260的上表面通过胶材贴合固定方式进行固定连接。
应理解，图9所示的滤光片260的数量、位置以及具体结构仅为示例性 描述，本申请实施例对此不做限定。例如，可以根据所述成像芯片250的实际需求确定是否添加一个或者多个所述滤光片260。
当所述滤波片260可以位于镜筒220内时，屏下生物特征识别装置200还包括：微透镜阵列，微透镜阵列固定在成像芯片250的上表面，微透镜阵列用于将穿过镜头210的光信号成像到成像芯片250的成像像素单元。可选地，微透镜阵列包括多个成阵列分布的半球透镜或棱镜，由于半球透镜或棱镜有聚光作用，因此，通过在成像芯片250的上表面添加微透镜阵列能够增加成像芯片250上接收到的信号量。
综上所述，本申请实施例中的屏下生物特征识别装置200可以兼容和适应集成微透镜阵列的成像芯片250和不集成微透镜阵列的成像芯片250的机械结构，其在结构上更灵活。
可选地，在本申请一个实施例中，成像芯片250中的每一个成像像素单元对应有微透镜阵列中的一个微透镜。
可选地，在本申请一个实施例中，所述微透镜阵列中的微透镜为半球透镜，成像像素单元为多边形，所述半球透镜的直径为所述多边形的长边的长度。
图11是本申请实施例的集成有微透镜阵列的成像芯片的示意性结构图，如图11所示，所述成像像素单元为正方形时，则所述半球透镜的直接约为所述正方形的边长。例如，所述成像像素单元的边长和所述半球透镜的直径均为5um。
需要注意的是，所述成像芯片250上的半球透镜时，其厚度可以为5um，但是5um厚的半球透镜在毫米级厚度的模组图纸是显示不出来的。也就是说，图10所示的微透镜阵列251仅为示例，本申请实施例不限于此。
换句话说，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及屏下生物特征识别装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请实施例中，所述屏下生物特征识别装置200不和所述显示屏直接接触，即，所述屏下生物特征识别装置200和所述显示屏之间采用分离设计。
可选地，在本申请一个实施例中，屏下生物特征识别装置200中的支架230通过固定架固定在显示屏的下方，并使得显示屏的上表面与镜头210光学中心之间的距离满足成像条件。
可选地，在本申请一个实施例中，所述成像条件可以为以下光学成像公式：
1/u+1/v＝1/f。
其中，u表示物距，v表示像距，f表示焦距。即物距的倒数加上像距的倒数等于焦距的倒数。本申请实施例中，所述显示屏的上表面与镜头210光学中心之间的距离为物距，所述镜头210光学中心与成像芯片250的上表面之间的距离为像距，所述镜头210的焦距为一个固定值。
换句话说，支架230通过固定架固定在显示屏的下方时，需要使得显示屏的上表面、镜头210光学中心以及成像芯片250的上表面之间的距离满足上述光学成像公式。
具体地，镜头210的光学中心与成像芯片250的上表面之间的距离(即镜头210的成像距离)，可以通过自动调焦机器调整镜筒220的高度来实现调整镜头210与成像芯片250之间的距离。由于成像芯片250接收的光会包含指纹信号和屏内部结构信号。因此，本申请实施例中，进一步可以通过调节镜头210的焦点形成微弱的立交条件，使得屏内部结构信号的成像模糊，但指纹信号的成像不受影响。
换句话说，可以对上述公式中像距(即所述镜头210光学中心与成像芯片250的上表面之间的距离)进行修正。例如，将第一成像界面偏移一定距离至第二成像界面，所述第二成像界面距离所述镜头210的光学中心之间的距离定义为所述像距修正后的值，其中，所述第一成像界面为指纹信号的成像最清晰的界面，且屏内部结构信号对指纹信号的成像产生影响，使得指纹成像达不到指纹识别的要求。
应理解，所述第一成像界面偏移的距离可以向靠近所述镜头210的光学中心的方向偏移，也可以是向远离所述镜头210的光学中心的方向偏移，本申请实施例不做限定。例如，所述第一成像界面偏移的距离可以是±10um～±50um。应注意，所述范围仅为所述间隙的示例范围，本申请实施例不限于此。
图12是本申请实施例的屏下生物特征识别装置的支架的上表面贴有泡棉的定向视图。如图12所示，所述屏下生物特征识别装置200还可以包括泡棉290，所述泡棉290设置于所述支架230的上表面。所述泡棉290可以用于密封防尘。
本申请实施例中，所述屏下生物特征识别装置200可以通过固定连接在所述终端设备内部容易拆卸的器件上来实现安装在所述显示屏的下方。
换句话说，上述容易拆卸的器件可以作为所述屏下生物特征识别装置200与所述显示屏320之间的固定架。所述屏下生物特征识别装置200可以通过其他辅助元件实现以非接触方式固定设置在所述显示屏的下方。比如，所述屏下生物特征识别装置200可以固定到所述固定架，并通过所述固定架固定设置在所述显示屏的下方。
可选地，在本申请一个实施例中，当所述屏下生物特征识别装置应用在移动终端(比如智能手机)时，所述屏下生物特征识别装置200和所述显示屏之间可以通过所述移动终端的中框或者其他元部件固定在所述显示屏的下方。
图13至图18是将支架230通过中框370设置于显示屏320下方的示意图。如图13至图18所示，所述屏下生物特征识别装置200可以固定设置在所述显示屏220的下方。其中，所述显示屏320可以为如图1和图2所示的OLED显示屏120，所述屏下生物特征识别装置200可以为如图1和图2所示的屏下生物特征识别装置140，其具体可以包括镜头210、镜筒220、支架230、成像芯片250、滤波片260、FPC 270以及泡棉290等等。所述屏下生物特征识别装置200可以用于采集指纹或者其他生物特征，且其生物特征采集区域至少部分位于所示显示屏320的显示区域之内。所述显示屏320和所述屏下生物特征识别装置200的具体结构、功能以及生物特征检测识别过程可以参照前面关于OLED显示屏120和屏下生物特征识别装置140的描述，此处不再赘述。
中框370为电子设备的设置于显示屏320和后盖中间并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电池，主板，摄像头，排线，各种感应器，话筒，听筒等等零部件。
中框370可以由金属或者合金材料制成，甚至可以由塑胶材料制成，这种情况下，所述中框370甚至可以和移动终端的边框一体成型，所述一体成型指内部中框和边框是一个整体。比如，边框可以只是一个金属贴边，或者可以在中框上面镀一层类似金属的涂料。进一步地，所述中框370还可以是复合中框，例如，包括内中框与外中框，其中，内中框用于承载手机零部件(例如支架230)，外中框在内中框外，外中框外沿装有手机按键，内中框与 外中框整合为一体。
可选地，在本申请一个实施例中，屏下生物特征识别装置200与所述显示屏320之间存在间隙。
应当理解，所述屏下生物特征识别装置200与所述显示屏320之间存在间隙旨在为了使得显示屏的上表面与镜头210光学中心之间的距离满足成像条件，本申请实施例对所述间隙的大小和具体含义不做限定。
例如，所述间隙可以是厂商在对所述生物识别装置200的安装过程中通过调试确定的，也可以是各个厂商规定好的。
又例如，所述间隙可以是镜筒220的上表面与所述显示屏320的下表面之间的距离，也可以是支架230的上表面与显示屏320的下表面之间的距离。
可选地，在本申请一个实施例中，所述屏下生物特征识别装置200与所述显示屏320之间存在间隙的间隙宽度可以大于或等于第一距离，所述第一距离为所述终端设备处于跌落或者碰撞等震荡状态时所述镜筒220与所述显示屏320不会发生触碰的最小距离。
例如，所述间隙宽度的范围可以为：0.3mm-1mm。应注意，所述范围仅为所述间隙的示例范围，本申请实施例不限于此。
应当理解，虽然上述实施例中以所述中框370为固定架为例，但是，在其他实施例中，所述屏下生物特征识别装置200可以通过固定连接在所述终端设备内部容易拆卸的任意器件上来实现安装在所述显示屏320的下方，并保证所述屏下生物特征识别装置200与所述显示屏320之间存在间隙。只要上述屏下生物特征识别装置200能够以非接触方式固定设置在所述显示屏320的下方便可。在其他实施例中，所述屏下生物特征识别装置200也可以固定到所述移动终端的后盖、主板以及电池等易拆卸的器件上，进一步地固定设置在所述显示屏320的下方。
由于所述屏下生物特征识别装置200采用非接触方式设置在所述显示屏320的下方，且不和所述显示屏320的下表面接触，即，所述屏下生物特征识别装置200和所述显示屏320完全解耦，避免了拆卸所述屏下生物特征识别装置200时损坏所述显示屏320。
此外，由于所述屏下生物特征识别装置200和所述显示屏320的下表面不接触，二者之间保持一个固定的间隙，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320受到按压或者终端设备出 现跌落或碰撞时均不会出现所述屏下生物特征识别装置200接触到所述显示屏320的下表面，也不会影响所述屏下生物特征识别装置200的生物特征识别稳定性和性能。
综上所述，本申请实施例通过将所述屏下生物特征识别装置200与所述显示屏320的下表面进行分离设计，能够降低拆卸所述屏下生物特征识别装置200的难度，进而提高终端设备的可维修性。进一步地，能够降低在所述屏下生物特征识别装置的生产过程中将所述屏下生物特征识别装置200安装到所述显示屏320下方的复杂度，并提高所述屏下生物特征识别装置生产成功率，进而降低的生产成本。此外，也不会影响所述屏下生物特征识别装置200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13至图15所示，所述泡棉290设置于所述支架230的上表面和所述中框370的下表面之间。所述泡棉290不但可以用于密封防尘，还可以用于贴合所述支架230与所述中框370。
需要说明的是，本申请实施例中，所述显示屏320和所述中框370之间的位置关系是相对固定的。
可选地，在本申请一个实施例中，如图13所示，所述中框370的上表面的边缘区域与所述显示屏320的下表面贴合，且所述中框370的上表面中除边缘之外的区域与所述显示屏320之间也可以存在间隙。
其中，所述中框370的上表面的边缘区域与所述显示屏320的下表面贴合可以理解为：所述显示屏320和所述中框370，通过所述显示屏320的下表面的边缘与所述中框370的上表面的边缘贴合的方式，进行相互之间的固定连接。
本申请实施例中，屏下生物特征识别装置200采用光学方式进行生物特征识别时，比如光学指纹识别时，所述屏下生物特征识别装置200需要检测所述显示屏320发出的光信号经过手指反射而形成的反射光。
在一个可选的方案中，如图13所示，所述中框370在所述屏下生物特征识别装置200的安装区域形成有开孔371，所述屏下生物特征识别装置200设置于所述开孔371的下方，且其光学感应阵列通过所述开孔371与所述显示屏320的下表面正对设置。因此，当所述屏下生物特征识别装置200设置在所述中框370的下表面时，能够保证所述屏下生物特征识别装置200可以透过所述开孔371接收到上述反射光，
应理解，本申请实施例对所述开孔371的尺寸不做具体限定。例如，所述中框370的开孔371的尺寸可以小于或者等于所述屏下生物特征识别装置200的尺寸。又例如，所述中框370的开孔371的尺寸也可以大于或等于镜筒220的尺寸。
可选地，在本申请的一个实施例中，如图15所示，所述中框370的开孔371的尺寸可以小于所述屏下生物特征识别装置200的尺寸。
可选地，在本申请的一个实施例中，如图16所示，所述中框370的开孔371的尺寸大于镜筒220的尺寸，且所述中框370的开孔371的尺寸小于所述屏下生物特征识别装置200的尺寸。这种情况下，镜筒220可以部分容纳在中框370的开孔371内，且镜筒220和中框370之间可以形成有缓冲空间，其可以保证在当所述中框370受到按压或者终端设备出现跌落或碰撞时均不会出现镜筒220接触到中框370，也不会影响所述屏下生物特征识别装置200的生物特征识别稳定性和性能。
可选地，在本申请的一个实施例中，如图17和图18所示，所述中框370的开孔371的尺寸可以大于所述屏下生物特征识别装置200的尺寸。
可选地，在本申请的一个实施例中，所述屏下生物特征识别装置200可以直接固定在中框370上。
可选地，在本申请的一个实施例中，所述屏下生物特征识别装置200的侧表面可以与所述开孔371的孔壁固定连接；或者，所述屏下生物特征识别装置200的上表面边缘可以与所述中框370的下表面位于所述开孔371周围的区域固定连接。
图13和图14是屏下生物特征识别装置200与中框370之间直接进行固定连接的示意性结构图。例如，如图13所示，所述屏下生物特征识别装置200的上表面边缘可以与所述中框370的下表面位于所述开孔371周围的区域固定连接。更具体地，例如，如图14所示，所述支架230的上表面和所述中框与所述中框370的下表面位于所述开孔371周围的区域固定连接。
本申请实施例中，所述屏下生物特征识别装置200与所述中框370之间直接进行固定连接的方式仅为示例性描述，本申请实施例不限于此。例如，在其他可替代实施例中，所述屏下生物特征识别装置200还可以通过连接件与所述中框370之间进行固定连接。
可选地，在本申请的一个实施例中，所述屏下生物特征识别装置200还 可以包括：模组支架330，所述模组支架330可以作为所述支架230与所述中框370之间的连接件，用于实现二者之间的固定连接。
可选地，在本申请的一个实施例中，所述屏下生物特征识别装置200的侧表面可以与上述模组支架330的内侧表面固定连接，或者所述屏下生物特征识别装置200的上表面边缘与该模组支架330的下表面固定连接；而上述模组支架330的外侧表面与该开孔371的孔壁固定连接，或者该模组支架330的上表面与该中框370的下表面位于该开孔371周围的区域(即孔口边缘处)固定连接。
图15至图18是屏下生物特征识别装置200通过模组支架330与所述中框370之间进行固定连接的示意性结构图。
可选地，在本申请的一个实施例中，如图15所示，所述屏下生物特征识别装置200的侧表面可以固定在所述模组支架330的内侧表面，且所述屏下生物特征识别装置200的上表面边缘以及所述模组支架330的上表面可以同时固定到所述中框370下表面位于所述开孔371周围的区域(即孔口边缘处)。
可选地，在本申请的一个实施例中，如图16所示，所述支架230的侧表面可以固定在所述模组支架330的内侧表面，且支架230的上表面边缘以及所述模组支架330的上表面可以同时固定到所述中框370下表面位于所述开孔371周围的区域(即孔口边缘处)。
可选地，在本申请的一个实施例中，如图17和图16所示，所述中框370的开孔371的尺寸大于所述屏下生物特征识别装置200的尺寸，所述屏下生物特征识别装置200通过模组支架330来固定到所述中框370。
可选地，在本申请的一个实施例中，如图17所示，所述屏下生物特征识别装置200的上表面边缘通过所述模组支架330固定到所述中框370下表面位于所述开孔371周围的区域(即孔口边缘处)。
可选地，在本申请的一个实施例中，如图18所示，所述支架230的上表面边缘通过所述模组支架330固定到所述中框370下表面位于所述开孔371周围的区域(即孔口边缘处)。
采用图17和图18所示的设计结构，使得上述模组支架330的上表面还可以高于所述屏下生物特征识别装置200的上表面，一方面能够保证所述屏下生物特征识别装置200与显示屏320之间存在间隙。另一方面，由于上述 模组支架330的上表面高于所述屏下生物特征识别装置200的上表面，因此，所述屏下生物特征识别装置200可以与所述模组支架330的至少一个表面进行固定连接，增加了所述屏下生物特征识别装置200与模组支架330之间的接触面积，在通过双面胶固定方式或者胶水固定方式对所述屏下生物特征识别装置200和所述模组支架330进行固定连接时，能够增加固定连接的稳定性。
应当理解，本申请实施例中涉及的固定连接包括但不限于以下连接方式：螺钉固定方式、双面胶固定方式、胶水固定方式、焊接固定方式以及耦合固定方式。
应理解，上述模组支架330的主要作用是将所述屏下生物特征识别装置200固定连接在所述中框370，并使得所述屏下生物特征识别装置200和所述显示屏320之间存在间隙。图14所示的模组支架330的位置和/或具体结构仅为示例，本申请实施例不限于此。
例如，在其他实施例中，为了增加所述屏下生物特征识别装置200与模组支架330之间固定连接的稳定性，上述模组支架330还可以设置有空腔结构，所述空腔结构与所述中框370的开孔371对准设置，其可以为所述屏下生物特征识别装置200提供一个收容空间，且所述屏下生物特征识别装置200至少部分收容并固定在所述空腔结构之中。比如，所述屏下生物特征识别装置200的侧表面通过所述空腔结构与上述模组支架330的内侧表面固定连接。
进一步地，为了保证所述屏下生物特征识别装置200通过所述空腔结构与上述模组支架330的固定连接具有一定的稳定性，作为一个实施例，所述空腔结构的形状可以为所述屏下生物特征识别装置200的形状。作为另一个实施例，还可以对空腔结构做进一步优化。例如，所述模组支架330的空腔结构的顶部边缘可以向内延伸而形成一个环状固定部，且所述屏下生物特征识别装置200的上表面边缘可以固定到所述环状固定部的下表面，而所述环状固定部的上表面与所述模组支架330主体的上表面平齐。利用上述模组支架330的环状固定部，可以使得所述屏下生物特征识别装置200在所述空腔结构内部与所述模组支架330之间的连接更加稳定，且此时所述模组支架330的上表面高于所述屏下生物特征识别装置200的上表面，二者之间的高度差便可以进一步增加所述显示屏320与所述屏下生物特征识别装置200之 间的间隙宽度。
此外，终端设备的中框370可以采用金属中框或者铝合金中框，由于其厚度可能较薄或者较厚而未能满足所述显示屏320和所述屏下生物特征识别装置200之间的间隙的宽度要求。因此，为了保证本申请实施例中所述屏下生物特征识别装置200和所述显示屏320之间的间隙具有足够的宽度。本申请实施例中，还可以进一步优化所述中框370的结构设计。下面结合附图岁本申请实施例的中框370的结构进行示例性说明。
实际产品中，如果所述中框370的厚度较薄，可选地，在本申请的一个实施例中，可以对所述中框370上的所述屏下生物特征识别装置200的安装区域进行加厚处理。
可选地，在本申请的一个实施例中，所述中框370在上述安装位置可以形成有开孔371，且所述中框370的开孔371的边缘还可以向下延伸而形成第五凸起结构。所述屏下生物特征识别装置200可以直接安装或者通过模组支架330固定到所述第五凸起结构的下表面。
可选地，在本申请的一个实施例中，如图15和图16所示，所述中框370的开孔371的边缘还可以向下延伸而形成有凸环，其中所述屏下生物特征识别装置200在安装到所述中框370之后可以位于所述凸环的内侧。进一步地，如图15和图16所示，所述屏下生物特征识别装置200也可以通过所述模组支架330固定到所述凸环内。所述凸环一方面可以保证所述中框370在所述开孔371的外围区域进行减薄之后仍具有较高的强度，另一方面也可以对其内侧的屏下生物特征识别装置200进行保护。
实际产品中，如果所述中框370的厚度较厚，可选地，在本申请的一个实施例中，也可以对所述中框370上的所述屏下生物特征识别装置200的安装区域进行减薄处理。
可选地，在本申请的一个实施例中，所述中框370的下表面在所述开孔371的周围区域可以开设有凹槽结构。所述屏下生物特征识别装置200可以直接安装或者通过模组支架330固定到所述凹槽结构中。例如，如图17和图18所示，所述中框370的下表面在背向所述显示屏320的孔口边缘处向上延伸形成有凹槽结构，所述屏下生物特征识别装置200通过模组支架320固定在所述凹槽结构内。
可选地，在本申请的一个实施例中，还可以对所述中框370的上表面在 所述开孔371的外围区域进行减薄处理。例如，如图15和图16所示，所述中框370的上表面在所述开孔371的边缘区域形成有第三台阶结构。即所述中框370在所述开孔371的外围区域的厚度小于所述中框370的主体厚度。
可选地，在本申请的一个实施例中，所述第三台阶结构的高度差同样可以作为所述显示屏320与所述屏下生物特征识别装置200之间的间隙的一部分。
可选地，在本申请的一个实施例中，如图18所示，所述中框370的上表面在所述开孔371的边缘区域形成有第三台阶结构，并且所述中框370的下表面在所述开孔371的周围区域可以开设有凹槽结构。
可选地，在本申请的一个实施例中，如图14至图18所示，所述中框370的开孔371朝向所述显示屏320的孔口边缘可以做倒角处理来形成斜角，所述斜角可以更有利于反射光从所述中框370的开孔371进入所述屏下生物特征识别装置200，从而提高所述屏下生物特征识别装置的生物特征检测性能和检测效率。
可选地，在本申请的一个实施例中，所述斜角的延伸至所述中框的下表面的背向所述显示屏的孔口边缘处，使得所述间隙包括所述斜角所在面在垂直所述显示屏方向上的投影高度。
可选地，在本申请的一个实施例中，如图14至图18所示，当所述屏下生物特征识别装置200应用于终端设备时，其还可以包括：盖板310。
其中，所述盖板310可以为透明保护盖板，比如玻璃盖板或者蓝宝石盖板，其可以覆盖在所述显示屏120，并且所述盖板310的下表面可以与所述显示屏320的上表面(即显示面)进行贴合。显示屏320与盖板310之间可以通过粘胶层连接，也可以通过其他连接方式连接，本申请实施例对此不做限定。
通过以上分析可以发现，本申请实施例中，通过让屏下生物特征识别装置200和显示屏320分离设计，例如，屏下生物特征识别装置200可以固定在中框370或后盖结构件上，解决目前屏下生物特征识别装置直接将屏下生物特征识别装置200贴合到显示屏320而导致的拆卸难，易损坏显示屏320，工艺贴合难度高等问题。
此外，本申请实施例中，所述屏下生物特征识别装置200和所述显示屏320的下表面之间形成一个间隙，所述间隙可保证在所述显示屏320受到按 压或者当所述终端设备跌落或碰撞等条件下，所述屏下生物特征识别装置200均不接触所述显示屏320下表面，避免损坏所述显示屏320。
应当理解，图13至图18仅为屏下生物特征识别装置200贴合在中框370下表面的示例，本申请实施例不限于此。例如，在其他替代实施例中，所述屏下生物特征识别装置200可以设置于所述中框370的上表面或者内部，并使得屏下生物特征识别装置200与所述显示屏320之间保持一个具有预定宽度的间隙。在具体地实现方式中，所述中框370的上表面可以形成有凹槽结构，所述屏下生物特征识别装置200可以固定在所述凹槽结构内，所述凹槽结构可以用于为屏下生物特征识别装置200提供容纳空间。
此外，可替代地，图17和图18所示的屏下生物特征识别装置200也可以安装到所述模组支架330的开口331的内部，比如所述屏下生物特征识别装置200的外侧表面可以固定到所述开口331的内侧面。换句话说，本申请实施例对屏下生物特征识别装置200中各部件之间的连接方式也不做限定。
在本申请实施例中，上述屏下生物特征识别装置200也可以称为生物特征识别模组。光电探测器阵列也可以称为光电传感器阵列，其可以镜头220传输过来的光。例如，光电传感器阵列可以采用光电二极管的阵列，通过光电二极管将光信号转换为电信号，从而可以根据电信号进行成像。
本申请实施例中，还提供了一种生物特征识别组件，其可以包括屏下生物特征识别装置和模组支架；当所述生物特征识别组件应用到如上所述的屏下生物特征识别装置或者终端设备时，可以直接安装到所述终端设备的中框或者固定架，而在当所述屏下生物特征识别装置或者所述终端设备的屏下生物特征识别装置出现损坏时，可以对损坏的生物特征识别组件进行更换，因此能够进一步降低更换屏下生物特征识别装置的维修和器件更换的复杂度，避免对显示屏造成损坏。
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以及上述本申请各种实施例中的屏下生物特征识别装置，所述屏下生物特征识别装置设置在显示屏的下方，并使得显示屏的上表面与屏下生物特征识别装置中的镜头的光学中心之间的距离满足成像条件。。
所述电子设备可以为任何具有显示屏的电子设备，其采用本申请实施例的技术方案实现屏下生物特征识别。所述显示屏可以为有机发光二极管显示屏，包括多个有机发光二极管光源，其中所述屏下生物特征识别装置采用至 少部分有机发光二极管光源作为生物特征识别的激励光源。
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. 一种屏下生物特征识别装置，其特征在于，包括：
    镜头，设置在显示屏的下方，用于接收来自所述显示屏上方的经由人体手指反射形成的光信号，其中所述光信号用来检测所述手指的生物特征信息；
    镜筒，所述镜头固定在所述镜筒内；
    支架，所述支架和所述镜筒之间通过螺纹连接的方式进行连接，所述支架用于支撑所述镜筒。
  2. 根据权利要求1所述的屏下生物特征识别装置，其特征在于，所述镜筒和所述支架之间形成有点胶结构，所述镜筒和所述支架之间的螺纹连接通过在所述点胶结构内进行点胶的方式进行固定。
  3. 根据权利要求2所述的屏下生物特征识别装置，其特征在于，所述点胶结构包括：所述支架的上表面在螺纹孔的外围区域向下延伸形成的第一台阶结构。
  4. 根据权利要求1至3中任一项所述的屏下生物特征识别装置，其特征在于，所述镜头包括非球面透镜或非球面透镜组。
  5. 根据权利要求1至4中任一项所述的屏下生物特征识别装置，其特征在于，所述镜头为微距镜头。
  6. 根据权利要求5所述的屏下生物特征识别装置，其特征在于，所述微距镜头的焦距范围为0.5mm-1.8mm。
  7. 根据权利要求1至6中任一项所述的屏下生物特征识别装置，其特征在于，所述支架的下表面在螺纹孔的外围区域向下延伸形成有第一凸起结构，所述镜头安装在所述第一凸起结构内。
  8. 根据权利要求7所述的屏下生物特征识别装置，其特征在于，所述支架的下表面在所述第一凸起结构和所述支架的边缘之间形成有第二凸起结构。
  9. 根据权利要求1至8中任一项所述的屏下生物特征识别装置，其特征在于，所述镜筒的上表面在筒口处向内延伸形成第三凸起结构，所述第三凸起结构用于固定所述镜头。
  10. 根据权利要求9所述的屏下生物特征识别装置，其特征在于，所述 镜筒的上表面在筒口处通过倒角处理形成有斜角，使得所述镜筒在上表面处的内径大于所述镜筒在所述第三凸起结构处的内径。
  11. 根据权利要求9所述的屏下生物特征识别装置，其特征在于，所述镜筒的内侧表面在所述第三凸起结构的下方形成有第二台阶结构，所述镜头通过所述第二台阶结构固定在所述镜筒内。
  12. 根据权利要求9所述的屏下生物特征识别装置，其特征在于，所述镜筒的外侧表面在所述第三凸起结构的下方形成第五凸起结构，所述第五凸起结构上形成有外螺纹。
  13. 根据权利要求1至12中任一项所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置还包括：
    成像芯片，所述成像芯片设置在镜筒的下方，所述成像芯片用于基于穿过所述镜头的光信号进行成像，其中，所述镜头与所述成像芯片之间的距离通过旋转所述镜筒进行调整。
  14. 根据权利要求13所述的屏下生物特征识别装置，其特征在于，所述镜头的光学中心与所述成像芯片的上表面之间的距离等于所述镜头的成像距离。
  15. 根据权利要求13所述的屏下生物特征识别装置，其特征在于，所述镜筒的上边表在边缘区域向外延伸形成有至少一个第五凸起结构，所述第五凸起结构用于旋转所述镜筒，以调整所述镜头与所述成像芯片之间的距离。
  16. 根据权利要求13至15中任一项所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置还包括：
    光学滤波片，所述光学滤波片位于所述镜头的和所述成像芯片之间。
  17. 根据权利要求16所述的屏下生物特征识别装置，其特征在于，所述光学滤波片固定在所述成像芯片的上表面。
  18. 根据权利要求16所述的屏下生物特征识别装置，其特征在于，所述光学滤波片固定在所述镜筒内。
  19. 根据权利要求18所述的屏下生物特征识别装置，其特征在于，所述镜头的下表面的边缘区域向下延伸形成有凸环结构，所述凸环结构的下表面与所述滤波片接触，所述凸环结构的外侧边缘区域与所述滤波片的上表面通过胶材贴合固定方式进行固定连接。
  20. 根据权利要求13至19中任一项所述的屏下生物特征识别装置，其 特征在于，所述屏下生物特征识别装置还包括：
    微透镜阵列，所述微透镜阵列固定在所述成像芯片的上表面，所述微透镜阵列用于将穿过所述镜头的光信号成像到所述成像芯片的成像像素单元。
  21. 根据权利要求20所述的屏下生物特征识别装置，其特征在于，所述成像芯片中的每一个成像像素单元对应有所述微透镜阵列中的一个微透镜。
  22. 根据权利要求20所述的屏下生物特征识别装置，其特征在于，所述微透镜阵列中的微透镜为半球透镜，所述成像像素单元为多边形，所述半球透镜的直径为所述多边形的长边的长度。
  23. 根据权利要求13至22中任一项所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置还包括：
    柔性印制电路板，所述成像芯片固定在所述柔性印制电路板的上表面，所述支架的下表面与所述柔性印制电路板的上表面的在所述成像芯片的边缘区域固定连接。
  24. 根据权利要求23所述的屏下生物特征识别装置，其特征在于，所述支架形成有排气孔，所述排气孔用于调整所述支架和所述柔性印制电路板形成的内部空间的气压强度。
  25. 根据权利要求24所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置还包括：
    钢板，所述钢板固定在所述柔性印制电路板的下表面。
  26. 根据权利要求1至25中任一项所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置还包括：
    固定架，所述支架通过所述固定架固定在所述显示屏的下方，并使得所述显示屏的上表面与所述镜头光学中心之间的距离满足成像条件。
  27. 根据权利要求26所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置应用于电子设备，所述固定架为所述电子设备的中框，所述中框用于支撑所述显示屏。
  28. 根据权利要求27的屏下生物特征识别装置，其特征在于，所述中框的上表面的边缘区域与所述显示屏的下表面贴合，且所述中框的上表面中除边缘之外的区域与所述显示屏之间存在间隙。
  29. 根据权利要求27所述的屏下生物特征识别装置，其特征在于，所述中框与所述支架通过以下安装方式中的任一种进行的安装固定：螺钉安装固 定方式、胶材贴合固定方式、焊接固定方式以及耦合固定方式。
  30. 根据权利要求27所述的屏下生物特特征识别装置，其特征在于，所述中框形成有开孔，所述镜筒至少部分容纳在所述开孔内，所述镜筒外侧和所述开孔的内侧之间存在间隙。
  31. 根据权利要求30所述的屏下生物特征识别装置，其特征在于，所述中框的上表面在所述开孔边缘通过倒角处理形成有斜角，所述斜角使得所述中框上表面的开孔宽度大于所述中框下表面的开孔宽度。
  32. 根据权利要求30所述的屏下生物特征识别装置，其特征在于，所述中框的上表面在所述开孔的边缘区域形成有第三台阶结构。
  33. 根据权利要求30所述的屏下生物特征识别装置，其特征在于，所述中框的下表面在所述开孔的外围区域向下延伸形成有第五凸起结构，所述支架安装在所述第五凸起结构的内部。
  34. 根据权利要求30所述的屏下生物特征识别装置，其特征在于，所述中框的下表面在所述开孔的边缘区域向上延伸形成槽结构，所述支架安装在凹槽结构内。
  35. 根据权利要求27至34中任一项所述的屏下生物特征识别装置，其特征在于，所述屏下生物特征识别装置还包括：
    泡棉，所述泡棉设置于所述支架的上表面和所述中框的下表面之间。
  36. 一种电子设备，其特征在于，包括：
    权利要求1至35中任一项所述的屏下生物特征识别装置。
  37. 根据权利要求36所述的电子设备，其特征在于，所述电子设备还包括：
    显示屏，所述屏下生物特征识别装置设置在所述显示屏的下方，并使得所述显示屏的上表面与所述屏下生物特征识别装置中的镜头的光学中心之间的距离满足预定的成像条件；其中所述屏下生物特征识别装置的生物特征采集区域至少部分位于所述显示屏的显示区域之中。
  38. 根据权利要求37所述的电子设备，其特征在于，所述电子设备还包括：中框，所述屏下生物特征识别装置通过所述中框装配到所述显示屏下方，以使所述屏下生物特征识别装置与所述显示屏之间存在间隙。
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