WO2019237353A1 - 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
WO2019237353A1
WO2019237353A1 PCT/CN2018/091641 CN2018091641W WO2019237353A1 WO 2019237353 A1 WO2019237353 A1 WO 2019237353A1 CN 2018091641 W CN2018091641 W CN 2018091641W WO 2019237353 A1 WO2019237353 A1 WO 2019237353A1
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WO
WIPO (PCT)
Prior art keywords
biometric identification
screen
wave plate
under
quarter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/091641
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English (en)
French (fr)
Inventor
蒋鹏
张键洋
凌伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
Original Assignee
Shenzhen Goodix Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Goodix Technology Co Ltd filed Critical Shenzhen Goodix Technology Co Ltd
Priority to EP18915777.9A priority Critical patent/EP3608829B8/en
Priority to PCT/CN2018/091641 priority patent/WO2019237353A1/zh
Priority to CN201880001286.1A priority patent/CN108885697B/zh
Priority to CN201980002827.7A priority patent/CN110741386A/zh
Priority to EP19809370.0A priority patent/EP3620975B1/en
Priority to PCT/CN2019/086886 priority patent/WO2019237872A1/zh
Priority to CN201920697997.9U priority patent/CN210181620U/zh
Priority to US16/658,057 priority patent/US11295110B2/en
Priority to US16/714,704 priority patent/US11200400B2/en
Publication of WO2019237353A1 publication Critical patent/WO2019237353A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F39/00—Integrated devices, or assemblies of multiple devices, comprising at least one element covered by group H10F30/00, e.g. radiation detectors comprising photodiode arrays
    • H10F39/10—Integrated devices
    • H10F39/12—Image sensors
    • H10F39/198—Contact-type image sensors [CIS]

Definitions

  • the embodiments of the present application relate to the technical field of biometrics, and more specifically, to an under-screen biometric recognition device and an electronic device.
  • the under-screen biometric identification technology is to place a biometric identification module under the display screen and a light leakage area below the display screen.
  • the biometric identification module detects the light carrying information of a target (such as a finger) transmitted from the light leakage area.
  • a target such as a finger
  • the module in the light leakage area under the screen may reflect light to the top of the display screen, which will cause appearance problems; on the other hand, the light leaked from the light leakage area that is not related to the biometric recognition will also affect the biometric recognition. effectiveness. Due to the above-mentioned various problems, the performance of the biometric recognition under the screen is affected.
  • the embodiments of the present application provide an under-screen biometric identification device and an electronic device, which can improve the performance of the under-screen biometric identification.
  • an under-screen biometric identification device including:
  • the optical functional layer includes a first linear polarizer and a first quarter wave plate, wherein the first linear polarizer and the first quarter wave plate are stacked;
  • the biometric identification module is configured to perform biometric identification according to light transmitted to the biometric identification module through the optical function layer.
  • the technical solution of the embodiment of the present application adopts an optical functional layer including a linear polarizer and a quarter-wave plate, which can improve the performance of biometric recognition under the screen.
  • the first quarter-wave plate is disposed on a side of the optical functional layer near the biometric identification module.
  • the technical solution in the embodiment of the present application can greatly reduce the reflected light of the biometric identification module, and thus can improve the appearance problem.
  • the first linear polarizer is disposed on a side of the optical functional layer near the biometric identification module.
  • the technical solution of the embodiment of the present application can reduce image noise and improve the efficiency of biometric recognition.
  • the optical axis of the first quarter-wave plate and the polarization direction of the first linear polarizer are at an angle of 45 °.
  • the optical functional layer further includes a second quarter wave plate, wherein the second quarter wave plate, the first linear polarizer, and the first four The quarter wave plates are stacked, and the first linear polarizer is disposed between the second quarter wave plate and the first quarter wave plate, and the first quarter wave plate The sheet is disposed on a side of the optical functional layer near the biometric identification module.
  • the technical solution of the embodiment of the present application can not only greatly reduce the reflected light of the biometric identification module, improve appearance problems, but also reduce image noise and improve the efficiency of biometric identification.
  • the optical axis of the first quarter-wave plate and the polarization direction of the first linear polarizer are at an angle of 45 °; the optical axis of the second quarter-wave plate At an angle of 45 ° to the polarization direction of the first linear polarizer.
  • the optical function layer is disposed below the display screen, and the biometric identification module is disposed below the optical function layer.
  • the display screen includes a light-emitting layer, a third quarter-wave plate, and a second linear polarizer, wherein the third quarter-wave plate is disposed above the light-emitting layer, The second linear polarizer is disposed above the third quarter-wave plate.
  • the optical axis of the third quarter-wave plate and the polarization direction of the second linear polarizer are at an angle of 45 °.
  • a setting direction of the optical function layer below the display screen is a direction in which a light intensity of emitted light is maximum.
  • the biometric identification module includes a pinhole array and a photosensor array, wherein the light is transmitted to the photosensor array through the pinhole array.
  • the sidewall of the pinhole array is black.
  • the color presented by the pinhole array can be consistent with other areas outside the light leakage area of the display screen, that is, all are black, so that the appearance problem can be further improved.
  • the biometric identification module further includes a filter, wherein the filter is disposed between the pinhole array and the photoelectric sensor array, and is configured to filter the light. deal with.
  • an electronic device including:
  • the display screen and the under-screen biometric identification device in the first aspect or any possible implementation manner of the first aspect.
  • the display screen is an organic light emitting diode display screen, and a light emitting layer of the display screen includes a plurality of organic light emitting diode light sources, wherein the under-screen biometric identification device uses at least part of an organic light emitting diode light source As an excitation light source for biometric recognition.
  • FIG. 1 is a schematic plan view of an electronic device to which the present application is applicable.
  • FIG. 2 is a schematic cross-sectional view of the electronic device shown in FIG. 1 along A'-A '.
  • FIG. 3 is a schematic diagram of an under-screen biometric recognition device according to an embodiment of the present application.
  • Figure 4 is a schematic diagram of the principle of anti-reflected light.
  • FIG. 5 is a schematic diagram of an under-screen biometric identification device according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of an under-screen biometric identification device according to another embodiment of the present application.
  • FIG. 7 is a schematic diagram of an under-screen biometric identification device according to another embodiment of the present application.
  • FIG. 8 is a schematic diagram of an under-screen biometric identification device according to another embodiment of the present application.
  • FIG. 9 is a schematic diagram of an under-screen biometric identification device according to another embodiment of the present application.
  • FIG. 10 is a schematic diagram of an under-screen biometric recognition device according to another embodiment of the present application.
  • FIG. 11 is a schematic diagram of an under-screen biometric identification device according to another embodiment of the present application.
  • the under-screen biometric recognition technology refers to installing a biometric identification module (such as a fingerprint recognition module) below the display screen, thereby implementing biometric identification operations in the display area of the display screen, without the need to remove the display on the front of the electronic device The area outside the area sets the biometric collection area.
  • a biometric identification module such as a fingerprint recognition module
  • Under-screen biometrics uses light returned from the top surface of the device's display components for fingerprint sensing and other sensing operations.
  • the returned light carries information of an object (such as a finger) that is in contact with the top surface, and a specific optical sensor module located below the display screen is realized by collecting and detecting the returned light.
  • the optical sensor module can be designed to achieve the desired optical imaging by appropriately configuring the optical elements for collecting and detecting the returned light.
  • biometric identification in addition to fingerprint identification, the technical solutions of the embodiments of the present application can also perform other biometric identifications, such as biometric identification, which is not limited in the embodiments of the present application.
  • FIG. 1 and 2 are schematic diagrams of an electronic device 100 to which the biometric identification device under the screen can be applied, wherein FIG. 1 is a schematic front view of the electronic device 100, and FIG. 2 is an electronic device 100 shown in FIG. 1 along A'-A. 'Sectional cross-section structure diagram.
  • the electronic device 100 may include a display screen 120 and a biometric identification module 140, wherein the display screen 120 has a display area 102, and the biometric identification module 140 is disposed on the display. Below the screen 120.
  • the display screen 120 may be a self-luminous display screen, which uses a display unit with self-luminescence as a display pixel.
  • the display 120 may be an Organic Light-Emitting Diode (OLED) display or a Micro-LED display.
  • the display screen 120 may also be a liquid crystal display (Liquid Crystal Display, LCD) or other passive light-emitting display, which is not limited in the embodiment of the present application.
  • the display screen 120 is specifically a touch display screen, which can not only perform screen display, but also detect a user's touch or press operation, thereby providing a human-computer interaction interface for the user.
  • the electronic device 100 may include a touch sensor, and the touch sensor may specifically be a touch panel (TP), which may be disposed on the surface of the display screen 120 or partially Integrated or integrated into the display screen 120 to form the touch display screen.
  • TP touch panel
  • the biometric identification module 140 may be specifically an optical biometric identification module, such as an optical fingerprint module, which is mainly used to collect biometric information (such as fingerprint image information) of a user.
  • the biometric identification module 140 may be disposed at least in a local area below the display screen 120, so that the biometric identification area (or sensing area) 130 of the biometric identification module 140 At least partially located in the display area 102 of the display screen 120.
  • the biometric identification module 140 may specifically include an optical biometric sensor with an optical sensing array, such as an optical fingerprint sensor; the optical sensing array includes a plurality of optical sensing units, and the optical sensing array The area where is located corresponds to the biometric collection area 130 of the biometric identification module 140. As shown in FIG. 1, the biometric collection area 130 is located in the display area 102 of the display screen 120. Therefore, when the user needs to unlock the electronic device 100 or perform other biometric verification, the user only needs to By pressing a finger on the biometric collection area 130 located on the display screen 120, a biometric input operation can be implemented.
  • an optical biometric sensor with an optical sensing array, such as an optical fingerprint sensor
  • the optical sensing array includes a plurality of optical sensing units, and the optical sensing array
  • the area where is located corresponds to the biometric collection area 130 of the biometric identification module 140.
  • the biometric collection area 130 is located in the display area 102 of the display screen 120. Therefore, when the user needs to unlock the electronic device 100 or
  • the electronic device 100 adopting the above structure does not need a special reserved space on the front side to set fingerprint keys (such as the Home key), so a full-screen solution can be adopted. Therefore, the display area 102 of the display screen 120 can extend substantially to the entire front of the electronic device 100.
  • the embodiment of the present application uses the OLED display as an example.
  • the light-emitting layer of the display 120 has an array of OLED display units arranged in an array.
  • the biometric identification module 140 can use the OLED.
  • the OLED display unit (ie, OLED light source) of the display screen 120 located in the biometric collection area 130 is used as an excitation light source for biometric detection and identification.
  • the biometric identification module 140 may also use a built-in light source or an external light source to provide a light signal for biometric detection and identification.
  • the under-screen biometric identification device can be applied not only to self-luminous displays such as OLED displays, but also to non-self-luminous displays, such as liquid crystal displays or other passive light-emitting displays.
  • the optical sensing array of the biometric identification module 140 is specifically a photodetector array (also called a photodetector array), which includes a plurality of photodetectors distributed in an array. The detector can serve as an optical sensing unit as described above.
  • the light emitted by the display unit of the biometric collection area 130 reflects on the finger and forms a reflection.
  • Light, wherein the reflected light may carry biometric information of a user's finger.
  • the reflected light is returned to the display screen 120 and received by the photodetector array of the biometric identification module 140 below it and converted into a corresponding electrical signal, that is, a biometric detection signal.
  • the electronic device 100 can obtain the user's biometric information based on the biometric detection signal, and can further perform biometric matching verification to complete the identity verification of the current user in order to confirm whether he has the authority to the electronic device 100 Proceed accordingly.
  • the biometric identification module 140 may also be disposed in the entire area below the display screen 120, thereby extending the biometric collection area 130 to the entire display area of the entire display screen 120. 102. Realize full-screen biometric recognition.
  • the electronic device 100 further includes a protective cover 110, which may be specifically a transparent cover, such as a glass cover or a sapphire cover, which is located on the display screen 120 And covers the front surface of the electronic device 100, and a surface of the protective cover 110 may further be provided with a protective layer. Therefore, in the embodiment of the present application, the so-called finger pressing on the display screen 120 may actually mean that the finger presses the cover 110 above the display screen 120 or the surface of the protective layer covering the cover 110.
  • a protective cover 110 which may be specifically a transparent cover, such as a glass cover or a sapphire cover, which is located on the display screen 120 And covers the front surface of the electronic device 100, and a surface of the protective cover 110 may further be provided with a protective layer. Therefore, in the embodiment of the present application, the so-called finger pressing on the display screen 120 may actually mean that the finger presses the cover 110 above the display screen 120 or the surface of the protective layer covering the cover 110.
  • a circuit board 150 such as a flexible printed circuit (FPC) may be further provided below the biometric identification module 140, and the biometric identification module 140 may be soldered to all the terminals through pads.
  • the circuit board 150 is described, and electrical interconnection and signal transmission with other peripheral circuits or other components of the electronic device 100 are realized through the circuit board 150.
  • the biometric identification module 140 may receive a control signal of a processing unit of the electronic device 100 through the circuit board 150, and may further output the biometric detection signal to the circuit board 150 A processing unit or a control unit of the electronic device 100.
  • the biometric identification module 140 may use a light transmission structure (or light guiding structure), such as a periodic pinhole array, a collimator array, or a lens array, to transmit light to the sensing array.
  • a light transmission structure such as a periodic pinhole array, a collimator array, or a lens array
  • the biometric identification module 140 may reflect light above the electronic device 100, which may cause appearance problems.
  • the installation area of the biometric identification module 140 may be seen under strong light; on the other hand, it is transmitted to The light of the biometric identification module 140 that does not carry the information of the target will also affect the efficiency of the biometric identification.
  • the existence of the above various problems will affect the performance of the biometric recognition under the screen.
  • the embodiments of the present application provide an improved technical solution of biometric recognition under the screen to improve the performance of biometric recognition under the screen.
  • FIG. 3 is a schematic diagram of an under-screen biometric recognition device 300 according to an embodiment of the present application.
  • the under-screen biometric identification device 300 may include: an optical functional layer 310 and a biometric identification module 320.
  • the optical functional layer 310 may include a first linear polarizer 311 and a first quarter wave plate 312, wherein the first linear polarizer 311 and the first quarter wave plate 312 are stacked.
  • the biometric identification module 320 is configured to perform biometric identification according to light transmitted to the biometric identification module 320 through the optical function layer 310.
  • the optical function layer 310 processes light transmitted to the biometric identification module 320 and light reflected from the biometric identification module 320.
  • the design of the optical functional layer 310 considers the polarization state of light. Using a stack of linear polarizers and quarter-wave plates, it can filter useless light with useful light and weaken the reflected light, which can improve the screen. Performance of biometrics.
  • the optical axis of the first quarter wave plate 312 and the polarization direction of the first linear polarizer 311 are at an angle of 45 °.
  • the optical axis of the quarter-wave plate is at an angle of 45 ° to the polarization direction of the linear polarizer, which can reduce light loss.
  • the first quarter-wave plate 312 is disposed on a side of the optical functional layer 310 near the biometric identification module 320. .
  • the first linear polarizer 311 and the first quarter-wave plate 312 may adopt a positional relationship as shown in FIG. 3, that is, the first linear polarizer 311 is in the first fourth Above the half-wave plate 312, the first quarter-wave plate 312 is close to the biometric identification module 320.
  • the combination of a linear polarizer and a quarter wave plate can prevent objects below the quarter wave plate from reflecting light above the linear polarizer.
  • natural light passes through a linear polarizer to form linearly polarized light, and then passes through a quarter-wave plate to form circularly polarized light.
  • Objects below reflect this circularly polarized light in a vertical direction and add a 180 ° phase change. , That is, ⁇ changes.
  • the reflected circularly polarized light that has undergone the ⁇ change becomes linearly polarized light after passing through the quarter-wave plate again.
  • This linearly polarized light differs from the polarization direction of the linearly polarizer by 90 °, forming an extinction condition. In this way, most of the reflected light does not reach above the linear polarizer.
  • the reflected light of the biometric identification module 320 can be greatly weakened.
  • the under-screen biometric identification device 300 When the under-screen biometric identification device 300 is installed under the display screen, basically no reflected light reaches the top of the display screen, so that the human eye does not see the biometric identification module 320, which can improve appearance problems.
  • the first linear polarizer 311 is disposed on a side of the optical functional layer 310 near the biometric identification module 320.
  • the first linear polarizer 311 and the first quarter wave plate 312 may also adopt a positional relationship as shown in FIG. 5, that is, the first linear polarizer 311 is in the first Below the quarter-wave plate 312, the first linear polarizer 311 is close to the biometric identification module 320.
  • the optical function layer 310 further includes a second quarter-wave plate 313, wherein the second quarter-wave plate 313, The first linear polarizer 311 and the first quarter-wave plate 312 are stacked, and the first linear polarizer 311 is disposed on the second quarter-wave plate 313 and the first quarter-wave plate. Between the half-wave plates 312, the first quarter-wave plate 312 is disposed on a side of the optical functional layer 310 near the biometric identification module 320.
  • the optical axis of the first quarter wave plate 312 and the polarization direction of the first linear polarizer 311 are at an angle of 45 °; the optical axis of the second quarter wave plate 313 and The polarization direction of the first linear polarizer 311 is 45 °.
  • the optical functional layer 310 uses two quarter wave plates and a linear polarizer. With such a design, in addition to improving appearance problems, it is also possible to detect the polarization state of useful light related to biometrics, thereby enhancing biometric signals and weakening stray light, improving the efficiency of biometric recognition.
  • the optical function layer 310 is disposed below the display screen 330, and the biometric identification module 320 is disposed below the optical function layer 310.
  • a light leakage area is provided below the display screen 330.
  • a layer of black foam under the display screen 330.
  • the foam layer is removed in a specific area to form a light leakage area.
  • the under-screen biometric identification device 300 is installed under the light leakage area of the display screen 330.
  • the display screen 330 may include a light emitting layer 331 for providing a light signal for performing biometric detection and identification.
  • the light emitting layer 331 includes a light source.
  • the light emitting layer 331 includes a plurality of organic light emitting diode light sources.
  • the display screen 330 may further include a third quarter-wave plate 332 and a second linear polarizer 333, wherein the third quarter-wave plate 332 is disposed on the display screen 330.
  • the second linear polarizer 333 is disposed above the third quarter wave plate 332.
  • the optical axis of the third quarter-wave plate 332 and the polarization direction of the second linear polarizer 333 are at an angle of 45 °.
  • the display screen 330 may further include other inherent components, for example, the substrate 334 and the cover glass 335, but this embodiment of the present application is not limited thereto.
  • a setting direction of the optical function layer 310 below the display screen 330 is a direction in which the intensity of the emitted light is maximum.
  • the orientation direction of the optical function layer 310 below the display screen 330 determines the polarization direction of the linear polarizer in the optical function layer 310, the optical axis of the quarter-wave plate, and the linear polarization in the display screen 330.
  • the relationship between the polarization direction of the sheet and the optical axis of the quarter-wave plate can adjust the setting direction of the optical functional layer 310 so that the light intensity of the outgoing light of the optical functional layer 310 is the largest.
  • the light emitting layer 331 emits light on the screen and leaks light under the screen. These lights are natural light, that is, the polarization intensity is the same in all directions.
  • the light emitted upward from the light-emitting layer 331 passes through the second linear polarizing plate 333 and becomes linearly polarized light, and then passes through the cover glass 335 directly to the top of the screen.
  • the finger When a finger is placed on the screen, the finger reflects linearly polarized light, and the reflected light penetrates the cover glass 335 and passes through the linear polarizer 333.
  • Linearly polarized light related to finger characteristics passes through the third quarter-wave plate 332 in the screen to form circularly polarized light, and this circularly polarized light passes through the entire screen to the light leakage area under the screen.
  • the under-screen biometric identification device 300 placed in the under-light leakage area can perform under-screen biometric identification.
  • the linear polarizer and quarter-wave plate in the screen can reduce the external strong light interference (eliminate the light in the non-polarized direction), and reduce the reflected light reflected outside the screen (the principle is the same as Figure 4).
  • the biometric identification device 300 under the screen adopts the form shown in FIG. 5 or FIG. (The first quarter-wave plate 312 in FIG. 8 and the second quarter-wave plate 313 in FIG. 9) become linearly polarized light.
  • the linearly polarized light may pass through the first linearly polarizing plate 311.
  • the light leakage downward from the display screen 330 is natural light, which may introduce unnecessary noise.
  • the natural light is still natural light after passing through the quarter-wave plate (the first quarter-wave plate 312 in FIG. 8 and the second quarter-wave plate 313 in FIG. 9).
  • the first linear polarizer 311 When passing through the first linear polarizer 311, light in a non-polarized direction can be eliminated, thereby reducing noise and improving the efficiency of biometric recognition.
  • the first linear polarizer 311 and the first quarter wave plate 312 can reduce the reflection of the under-screen biometric identification device 300. Light, thereby improving appearance issues.
  • the under-screen biometric identification device 300 adopts the form shown in FIG. 3, after circularly polarized light related to finger characteristics passes through the screen, it becomes linearly polarized light through the first linear polarizer 311, and After the downward light leakage from the display screen 330 passes through the first linear polarizer 311, the light in the non-polarized direction is also eliminated. In this way, the proportion of the useful light signal does not change, that is, the efficiency of biometric recognition is not affected.
  • the first linear polarizer 311 and the first quarter-wave plate 312 can reduce the light reflected by the biometric identification device 300 under the screen, thereby improving appearance problems.
  • the solution of FIG. 10 can improve the appearance problem
  • the solution of FIG. 8 can improve the efficiency of biometric recognition
  • the solution of FIG. 9 can both improve the appearance problem and improve the efficiency of biometric recognition.
  • the technical solution of the embodiment of the present application adopts an optical functional layer including a linear polarizer and a quarter-wave plate, which can improve the performance of biometric recognition under the screen.
  • the biometric identification module 320 may be various modules for performing biometric identification using light.
  • the biometric identification module 320 may be the aforementioned biometric identification module 140.
  • the biometric identification module 320 may include a pinhole array 321 and a photoelectric sensor array 322, where the light passes through the pinhole array 321 Transmission to the photosensor array 322.
  • the pinhole array 321 may be, for example, a periodic pinhole array for guiding light to the photosensor array 322.
  • the photoelectric sensor array 322 can detect light and obtain a biometric detection signal.
  • the photo sensor array 322 may use an array of photodiodes, and converts light signals into electrical signals through the photodiodes, so that imaging can be performed according to the electrical signals.
  • a sidewall of the pinhole array 321 is black. That is, a blackened pinhole array 321 may be used. In this way, the colors presented by the pinhole array 321 are consistent with other areas outside the light leakage area of the display screen, that is, they are all black, which can further improve appearance problems.
  • the biometric identification module 320 further includes a filter 323, wherein the filter 323 is disposed between the pinhole array 321 and the photoelectric sensor array 322 For filtering the light.
  • the above-mentioned under-screen biometric identification device 300 may also be referred to as a biometric identification module.
  • the display screen 330 and the under-screen biometric identification device 300 may be connected through an adhesive layer, or may be connected through other connection methods, which is not limited in the embodiment of the present application.
  • the embodiment of the present application does not limit the connection manner between the components in the under-screen biometric identification device 300.
  • An embodiment of the present application further provides an electronic device.
  • the electronic device may include a display screen and an under-screen biometric identification device in various embodiments of the present application.
  • the electronic device may be any electronic device with a display screen, which uses the technical solution of the embodiment of the present application to realize biometric identification under the screen.
  • the display screen may be the display screen described in the above description, such as an OLED display screen or other display screens.
  • OLED organic light-emitting diode
  • the description of the display screen refer to the description of the display screen in the above description.
  • the display screen is an organic light-emitting diode display screen
  • the light-emitting layer of the display screen includes a plurality of organic light-emitting diode light sources, wherein the under-screen biometric identification device uses at least part of the organic light-emitting diode light source as the biometric identification. Excitation light source.
  • the disclosed systems and devices may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices, or units, or may be electrical, mechanical, or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions in 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 of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially a part that contributes to the existing technology, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium. Included are instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

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Abstract

一种屏下生物特征识别装置（300）和电子设备。该屏下生物特征识别装置（300）包括：光学功能层（310），包括第一线偏振片（311）和第一四分之一波片（312），其中，所述第一线偏振片（311）和所述第一四分之一波片（312）层叠设置；生物特征识别模组（320），用于根据经由所述光学功能层（310）传输至所述生物特征识别模组（320）的光进行生物特征识别。该屏下生物特征识别装置（300）能够提升屏下生物特征识别的性能。

Description

屏下生物特征识别装置和电子设备 技术领域
本申请实施例涉及生物识别技术领域，并且更具体地，涉及一种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。
屏下生物特征识别技术是将生物特征识别模组设置于显示屏下，在显示屏下方设置漏光区域，生物特征识别模组通过检测从漏光区域传输下来的携带目标(例如手指)的信息的光，实现屏下生物特征识别。然而，屏下漏光区域的模组可能会反射光至显示屏的上方，从而会引起外观问题；另一方面，从漏光区域漏下的与生物特征识别无关的光，也会影响生物特征识别的效率。由于上述各种问题的存在，影响了屏下生物特征识别的性能。
因此，如何提升屏下生物特征识别的性能，成为一个亟待解决的技术问题。
发明内容
本申请实施例提供了一种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性能。
第一方面，提供了一种屏下生物特征识别装置，包括：
光学功能层，包括第一线偏振片和第一四分之一波片，其中，所述第一线偏振片和所述第一四分之一波片层叠设置；
生物特征识别模组，用于根据经由所述光学功能层传输至所述生物特征识别模组的光进行生物特征识别。
本申请实施例的技术方案，采用包括线偏振片和四分之一波片的光学功能层，能够提升屏下生物特征识别的性能。
在一些可能的实现方式中，所述第一四分之一波片设置于所述光学功能层的靠近所述生物特征识别模组的一侧。
本申请实施例的技术方案，可以大大削弱生物特征识别模组的反射光，因而能够改善外观问题。
在一些可能的实现方式中，所述第一线偏振片设置于所述光学功能层的靠近所述生物特征识别模组的一侧。
本申请实施例的技术方案，可以减少图像噪声，提升生物特征识别的效率。
在一些可能的实现方式中，所述第一四分之一波片的光轴与所述第一线偏振片的偏振方向呈45°角。
在一些可能的实现方式中，所述光学功能层还包括第二四分之一波片，其中，所述第二四分之一波片，所述第一线偏振片和所述第一四分之一波片层叠设置，所述第一线偏振片设置于所述第二四分之一波片和所述第一四分之一波片之间，所述第一四分之一波片设置于所述光学功能层的靠近所述生物特征识别模组的一侧。
本申请实施例的技术方案，既可以大大削弱生物特征识别模组的反射光，改善外观问题，又可以减少图像噪声，提升生物特征识别的效率。
在一些可能的实现方式中，所述第一四分之一波片的光轴与所述第一线偏振片的偏振方向呈45°角；所述第二四分之一波片的光轴与所述第一线偏振片的偏振方向呈45°角。
在一些可能的实现方式中，所述光学功能层设置于显示屏下方，所述生物特征识别模组设置于所述光学功能层下方。
在一些可能的实现方式中，所述显示屏包括发光层、第三四分之一波片和第二线偏振片，其中，所述第三四分之一波片设置于所述发光层上方，所述第二线偏振片设置于所述第三四分之一波片上方。
在一些可能的实现方式中，所述第三四分之一波片的光轴与所述第二线偏振片的偏振方向呈45°角。
在一些可能的实现方式中，所述光学功能层在所述显示屏下方的设置方向为出射光光强最大的方向。
在一些可能的实现方式中，所述生物特征识别模组包括小孔阵列和光电传感器阵列，其中，所述光通过所述小孔阵列传输至所述光电传感器阵列。
在一些可能的实现方式中，所述小孔阵列的侧壁为黑色。
本申请实施例的技术方案，可以使小孔阵列呈现的颜色与显示屏的漏光 区域外的其他区域一致，即，都为黑色，从而能够进一步改善外观问题。
在一些可能的实现方式中，所述生物特征识别模组还包括滤波片，其中，所述滤波片设置于所述小孔阵列和所述光电传感器阵列之间，用于对所述光进行滤波处理。
第二方面，提供了一种电子设备，包括：
显示屏以及第一方面或第一方面的任意可能的实现方式中的屏下生物特征识别装置。
在一些可能的实现方式中，所述显示屏为有机发光二极管显示屏，所述显示屏的发光层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。
附图说明
图1是本申请可以适用的电子设备的平面示意图。
图2是图1所示的电子设备沿A’-A’的部分剖面示意图。
图3是本申请一个实施例的屏下生物特征识别装置的示意图。
图4是抗反射光原理的示意图。
图5是本申请另一个实施例的屏下生物特征识别装置的示意图。
图6是本申请又一个实施例的屏下生物特征识别装置的示意图。
图7是本申请又一个实施例的屏下生物特征识别装置的示意图。
图8是本申请又一个实施例的屏下生物特征识别装置的示意图。
图9是本申请又一个实施例的屏下生物特征识别装置的示意图。
图10是本申请又一个实施例的屏下生物特征识别装置的示意图。
图11是本申请又一个实施例的屏下生物特征识别装置的示意图。
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。
随着电子设备步入全面屏时代，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生物特征识别模组(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。该返回的光携带与该顶面接触的物体(例如手指)的信息，通过采集和检测该返回的光实现位于显示屏下方的特定光学传感器模块。光学传感器模块的设计可以为通过恰当地配置用于采集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，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为电子设备100的正面示意图，图2为图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和生物特征识别模组140，其中，所述显示屏120具有显示区域102，所述生物特征识别模组140设置在所述显示屏120的下方。
所述显示屏120可以为自发光显示屏，其采用具有自发光的显示单元作为显示像素。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，所述显示屏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。
另一方面，所述显示屏120具体为触控显示屏，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。
所述生物特征识别模组140可以具体为光学生物特征识别模组，比如光学指纹模组，其主要用于采集用户的生物特征信息(比如指纹图像信息)。 在本申请实施例中，所述生物特征识别模组140可以至少设置在所述显示屏120下方的局部区域，从而使得所述生物特征识别模组140的生物特征采集区域(或感应区域)130至少部分位于所述显示屏120的显示区域102。
作为一种实施例，所述生物特征识别模组140可以具体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对应所述生物特征识别模组140的生物特征采集区域130。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，因此，用户在需要对所述电子设备100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。因此，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。
本申请实施例以所述显示屏120采用OLED显示屏为例，所述显示屏120的发光层具有呈阵列式排布的OLED显示单元阵列，所述生物特征识别模组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)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，该生物特征识别模组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，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，所述生物特征识别模组140的光学感应阵列具体为光探测器(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，所述光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，在本申请中统称为按压)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生物特征信息。比如，所述光线被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并被其下方的生物特征识别模组 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，所述生物特征识别模组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还包括保护盖板110，所述盖板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。
另一方面，所述生物特征识别模组140的下方还可以设置有电路板150，比如软性电路板(Flexible Printed Circuit，FPC)，所述生物特征识别模组140可以通过焊盘焊接到所述电路板150，并通过所述电路板150实现与其他外围电路或者所述电子设备100的其他元件的电性互连和信号传输。比如，所述生物特征识别模组140可以通过所述电路板150接受所述电子设备100的处理单元的控制信号，并且还可以通过所述电路板150将所述生物特征检测信号输出给所述电子设备100的处理单元或者控制单元等。
在一些实现方式中，生物特征识别模组140可以采用光传输结构(或光引导结构)，例如，周期性小孔阵列、准直器阵列或者透镜阵列等，将光线传输到感应阵列上。
然而，生物特征识别模组140可能会反射光至电子设备100的上方，从而会引起外观问题，例如，在强光下可能会看见生物特征识别模组140的安装区域；另一方面，传输至生物特征识别模组140的没有携带目标的信息的光，也会影响生物特征识别的效率。上述各种问题的存在，会影响屏下生物特征识别的性能。
鉴于此，本申请实施例提供了一种改进的屏下生物特征识别的技术方案，以提升屏下生物特征识别的性能。
图3示出了本申请一个实施例的屏下生物特征识别装置300的示意图。
如图3所示，屏下生物特征识别装置300可以包括：光学功能层310和生物特征识别模组320。
光学功能层310可以包括第一线偏振片311和第一四分之一波片312，其中，所述第一线偏振片311和所述第一四分之一波片312层叠设置。
生物特征识别模组320，用于根据经由所述光学功能层310传输至所述生物特征识别模组320的光进行生物特征识别。
在本申请实施例中，通过光学功能层310对传输至生物特征识别模组320的光和从生物特征识别模组320反射出来的光进行处理。光学功能层310的设计考虑了光的偏振状态，采用线偏振片和四分之一波片的叠层，可以通过有用的光而过滤没用的光，并削弱反射光，从而可以提升屏下生物特征识别的性能。
可选地，在本申请实施例中，所述第一四分之一波片312的光轴与所述第一线偏振片311的偏振方向呈45°角。四分之一波片的光轴与线偏振片的偏振方向呈45°角，能够减少光的损失。
可选地，在本申请一个实施例中，如图3所示，所述第一四分之一波片312设置于所述光学功能层310的靠近所述生物特征识别模组320的一侧。
也就是说，所述第一线偏振片311和所述第一四分之一波片312可以采用如图3所示的位置关系，即所述第一线偏振片311在所述第一四分之一波片312的上方，所述第一四分之一波片312靠近所述生物特征识别模组320。
线偏振片和四分之一波片组合可以防止四分之一波片以下物体反射光至线偏振片上方。如图4所示，自然光通过线偏振片后会形成线偏振光，然后通过四分之一波片后形成圆偏振光，下方的物体在垂直方向反射此圆偏振光并外加180°的相位变化，即π变。经过π变的反射圆偏振光再次经过四分之一波片后会变成线偏振光，此线偏振光相对于线偏振片的偏振方向相差90°，形成消光条件。这样，大部分反射光不会到达线偏振片上方。
因此，采用如图3所示的方案，可以大大削弱生物特征识别模组320的反射光。当屏下生物特征识别装置300安装到显示屏下时，基本不会有反射光到达显示屏上方，从而人眼不会看见生物特征识别模组320，因而能够改善外观问题。
可选地，在本申请一个实施例中，如图5所示，所述第一线偏振片311设置于所述光学功能层310的靠近所述生物特征识别模组320的一侧。
也就是说，所述第一线偏振片311和所述第一四分之一波片312也可以采用如图5所示的位置关系，即所述第一线偏振片311在所述第一四分之一波片312的下方，所述第一线偏振片311靠近所述生物特征识别模组320。
可选地，在本申请一个实施例中，如图6所示，所述光学功能层310还包括第二四分之一波片313，其中，所述第二四分之一波片313，所述第一线偏振片311和所述第一四分之一波片312层叠设置，所述第一线偏振片311设置于所述第二四分之一波片313和所述第一四分之一波片312之间，所述第一四分之一波片312设置于所述光学功能层310的靠近所述生物特征识别模组320的一侧。
可选地，所述第一四分之一波片312的光轴与所述第一线偏振片311的偏振方向呈45°角；所述第二四分之一波片313的光轴与所述第一线偏振片311的偏振方向呈45°角。
在本实施例中，光学功能层310采用两个四分之一波片和一个线偏振片。采用这样的设计，除了可以改善外观问题外，还能够将与生物特征相关的有用光的偏振状态检测出，进而增强生物特征信号并削弱杂散光，提升生物特征识别的效率。
可选地，在本申请一个实施例中，如图7所示，所述光学功能层310设置于显示屏330下方，所述生物特征识别模组320设置于所述光学功能层310下方。
具体而言，显示屏330下方设置漏光区域。例如，显示屏330下方有一层黑色泡棉，在特定区域去除泡棉层形成漏光区域，屏下生物特征识别装置300安装到显示屏330的漏光区域下。
显示屏330可以包括发光层331，用于提供用于进行生物特征检测识别的光信号。发光层331中包括光源，例如，对于OLED显示屏，发光层331中包括多个有机发光二极管光源。
如图7所示，可选地，显示屏330中还可以包括第三四分之一波片332和第二线偏振片333，其中，所述第三四分之一波片332设置于所述发光层331上方，所述第二线偏振片333设置于所述第三四分之一波片332上方。
可选地，所述第三四分之一波片332的光轴与所述第二线偏振片333的偏振方向呈45°角。
应理解，显示屏330中还可以包括其他固有的部件，例如，衬底334和 盖板玻璃335，但本申请实施例对此并不限定。
可选地，在将屏下生物特征识别装置300安装到显示屏330下时，光学功能层310在所述显示屏330下方的设置方向为出射光光强最大的方向。
具体而言，光学功能层310在所述显示屏330下方的设置方向决定了光学功能层310中的线偏振片的偏振方向、四分之一波片的光轴与显示屏330中的线偏振片的偏振方向、四分之一波片的光轴之间的关系，可以调节光学功能层310的设置方向，使得光学功能层310的出射光光强最大。
发光层331会朝屏上发光和屏下漏光，这些光是自然光，即偏振强度各方向都相同。从发光层331朝上发射的光经过第二线偏振片333后变为线偏振光，然后穿过盖板玻璃335直达屏上方。当手指放于屏上时，手指会反射线偏振光，此反射光穿透盖板玻璃335，并穿过线偏光片333。与手指特征相关的线偏振光经过屏内的第三四分之一波片332会形成圆偏振光，此圆偏振光会穿过整个屏到屏下漏光区域。在屏下漏光区域放置的屏下生物特征识别装置300就可以进行屏下生物特征识别。屏内的线偏振片和四分之一波片能够削弱外部的强光干扰(消除非偏振方向的光)，并削弱反射到屏外的反射光(原理同图4)。
如图8或图9所示，若屏下生物特征识别装置300采用图5或图6所示的形式，与手指特征相关的圆偏振光穿过屏后，可以先通过四分之一波片(图8中的第一四分之一波片312，图9中的第二四分之一波片313)，变为线偏振光。线偏振光可以通过第一线偏振片311。显示屏330向下的漏光是自然光，其会引入不必要的噪声。该自然光通过四分之一波片(图8中的第一四分之一波片312，图9中的第二四分之一波片313)后依然是自然光。再通过第一线偏振片311时，可以消除非偏振方向的光，从而可以减少噪声，提升生物特征识别的效率。
若屏下生物特征识别装置300采用图6所示的形式，如前所述，通过第一线偏振片311和第一四分之一波片312可以削弱屏下生物特征识别装置300反射出去的光，从而改善外观问题。
如图10所示，若屏下生物特征识别装置300采用图3所示的形式，与手指特征相关的圆偏振光穿过屏后，通过第一线偏振片311变为线偏振光，同时，显示屏330向下的漏光通过第一线偏振片311后，也消除了非偏振方向的光，这样，有用光信号的比例没有变化，即没有影响到生物特征识别的 效率。同时，如前所述，通过第一线偏振片311和第一四分之一波片312可以削弱屏下生物特征识别装置300反射出去的光，从而改善外观问题。
综上所述，图10的方案能够改善外观问题，图8的方案能够提升生物特征识别的效率，图9的方案既能改善外观问题，又能提升生物特征识别的效率。
因此，本申请实施例的技术方案，采用包括线偏振片和四分之一波片的光学功能层，能够提升屏下生物特征识别的性能。
生物特征识别模组320可以为各种利用光进行生物特征识别的模组。例如，生物特征识别模组320可以为前述的生物特征识别模组140。
可选地，在本申请一个实施例中，如图11所示，所述生物特征识别模组320可以包括小孔阵列321和光电传感器阵列322，其中，所述光通过所述小孔阵列321传输至所述光电传感器阵列322。
小孔阵列321例如可以是周期性的小孔阵列，用于将光引导至光电传感器阵列322。
光电传感器阵列322可检测光，得到生物特征检测信号。例如，光电传感器阵列322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。
可选地，在本申请一个实施例中，所述小孔阵列321的侧壁为黑色。也就是说，可以采用涂黑的小孔阵列321。这样，小孔阵列321呈现的颜色与显示屏的漏光区域外的其他区域一致，即，都为黑色，从而能够进一步改善外观问题。
可选地，在本申请一个实施例中，所述生物特征识别模组320还包括滤波片323，其中，所述滤波片323设置于所述小孔阵列321和所述光电传感器阵列322之间，用于对所述光进行滤波处理。
应理解，上述屏下生物特征识别装置300也可以称为生物特征识别模组。显示屏330与屏下生物特征识别装置300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。另外，本申请实施例对屏下生物特征识别装置300中各部件之间的连接方式也不做限定。
本申请实施例还提供了一种电子设备，该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。
该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。
显示屏可以采用以上描述中的显示屏，例如OLED显示屏或其他显示屏，显示屏的相关说明可以参考以上描述中关于显示屏的描述，为了简洁，在此不再赘述。
可选地，所述显示屏为有机发光二极管显示屏，所述显示屏的发光层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“该”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，应该理解到，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，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该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 (15)

  1. 一种屏下生物特征识别装置，其特征在于，包括：
    光学功能层，包括第一线偏振片和第一四分之一波片，其中，所述第一线偏振片和所述第一四分之一波片层叠设置；
    生物特征识别模组，用于根据经由所述光学功能层传输至所述生物特征识别模组的光进行生物特征识别。
  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，所述第一四分之一波片设置于所述光学功能层的靠近所述生物特征识别模组的一侧。
  3. 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，所述第一线偏振片设置于所述光学功能层的靠近所述生物特征识别模组的一侧。
  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，所述第一四分之一波片的光轴与所述第一线偏振片的偏振方向呈45°角。
  5. 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，所述光学功能层还包括第二四分之一波片，其中，所述第二四分之一波片，所述第一线偏振片和所述第一四分之一波片层叠设置，所述第一线偏振片设置于所述第二四分之一波片和所述第一四分之一波片之间，所述第一四分之一波片设置于所述光学功能层的靠近所述生物特征识别模组的一侧。
  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，所述第一四分之一波片的光轴与所述第一线偏振片的偏振方向呈45°角；所述第二四分之一波片的光轴与所述第一线偏振片的偏振方向呈45°角。
  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，所述光学功能层设置于显示屏下方，所述生物特征识别模组设置于所述光学功能层下方。
  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，所述显示屏包括发光层、第三四分之一波片和第二线偏振片，其中，所述第三四分之一波片设置于所述发光层上方，所述第二线偏振片设置于所述第三四分之一波片上方。
  9. 根据权利要求8所述的屏下生物特征识别装置，其特征在于，所述第三四分之一波片的光轴与所述第二线偏振片的偏振方向呈45°角。
  10. 根据权利要求7至9中任一项所述的屏下生物特征识别装置，其特征在于，所述光学功能层在所述显示屏下方的设置方向为出射光光强最大的方向。
  11. 根据权利要求1至10中任一项所述的屏下生物特征识别装置，其特征在于，所述生物特征识别模组包括小孔阵列和光电传感器阵列，其中，所述光通过所述小孔阵列传输至所述光电传感器阵列。
  12. 根据权利要求11所述的屏下生物特征识别装置，其特征在于，所述小孔阵列的侧壁为黑色。
  13. 根据权利要求11或12所述的屏下生物特征识别装置，其特征在于，所述生物特征识别模组还包括滤波片，其中，所述滤波片设置于所述小孔阵列和所述光电传感器阵列之间，用于对所述光进行滤波处理。
  14. 一种电子设备，其特征在于，包括：显示屏以及
    根据权利要求1至13中任一项所述的屏下生物特征识别装置。
  15. 根据权利要求14所述的电子设备，其特征在于，所述显示屏为有机发光二极管显示屏，所述显示屏的发光层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。
PCT/CN2018/091641 2018-06-15 2018-06-15 屏下生物特征识别装置和电子设备 Ceased WO2019237353A1 (zh)

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EP18915777.9A EP3608829B8 (en) 2018-06-15 2018-06-15 In-screen biological feature recognition apparatus and electronic device
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