WO2021138776A1 - Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique - Google Patents

Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique Download PDF

Info

Publication number
WO2021138776A1
WO2021138776A1 PCT/CN2020/070526 CN2020070526W WO2021138776A1 WO 2021138776 A1 WO2021138776 A1 WO 2021138776A1 CN 2020070526 W CN2020070526 W CN 2020070526W WO 2021138776 A1 WO2021138776 A1 WO 2021138776A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
area
fingerprint
optical
finger
Prior art date
Application number
PCT/CN2020/070526
Other languages
English (en)
Chinese (zh)
Inventor
李云
张玮
杨方明
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.)
Filing date
Publication date
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 CN202080001549.6A priority Critical patent/CN111837128A/zh
Priority to PCT/CN2020/070526 priority patent/WO2021138776A1/fr
Publication of WO2021138776A1 publication Critical patent/WO2021138776A1/fr

Links

Images

Classifications

    • 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
    • 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
    • G06V10/141—Control of illumination
    • 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
    • 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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • 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
    • G06V40/1382—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger
    • G06V40/1394—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger using acquisition arrangements
    • 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
    • G06V40/1341—Sensing with light passing through the finger

Definitions

  • This application relates to the field of biometrics, in particular to fingerprint anti-counterfeiting methods, fingerprint identification devices and electronic equipment.
  • Optical fingerprints are easier to crack than capacitive fingerprints.
  • low-cost and easy-to-obtain 2D printing/extraction fake fingerprints pose a greater threat to optical fingerprints.
  • the improvement of optical fingerprint security is imminent.
  • the current method of using 2D fake fingerprint color to resist can solve some fake fingerprints that are different from the real finger color, but for the flesh-colored or reddish fake fingerprints that are similar in color to the real finger, the anti-counterfeiting effect is poor.
  • This application provides a fingerprint anti-counterfeiting method, fingerprint identification device and electronic equipment, which can better defend against 2D fake fingerprint attacks.
  • a fingerprint identification device which is disposed under a display screen of an electronic device, the display screen includes a fingerprint detection area, and the fingerprint detection area includes a first light-emitting area and a second light-emitting area.
  • the fingerprint recognition device It includes: a light path guiding structure for guiding a first light signal in a first return light signal to an optical sensor, where the first return light signal is that the light-emitting display pixel in the first light-emitting area does not emit light and the second light-emitting area 2.
  • the light emitted by the light-emitting display pixels in the light-emitting area illuminates the light signal returned by the finger;
  • the optical sensor is located below the light path guiding structure and is used to receive the first light signal, and the optical sensor includes a light signal corresponding to the The first sensing area of the first light-emitting area, and the first light signal received by the first sensing area is used for fingerprint anti-counterfeiting authentication.
  • the fingerprint identification device of the embodiment of the present application a part of the non-luminous area is provided in the fingerprint detection area.
  • the real finger will have transmitted light in this part, while the 2D fake fingerprint does not transmit light. Therefore, according to the fingerprint identification device and the non-luminous area
  • the light intensity of the light signal received by the sensing area corresponding to the area can identify real fingers and 2D fake fingerprints, that is, using the difference in light intensity can better defend against 2D fake fingerprint attacks, and further ensure the security of optical fingerprint recognition.
  • the optical sensor includes a second sensing area corresponding to the second light-emitting area, and the first sensing area received by the second sensing area The optical signal is used for fingerprint recognition of the finger.
  • the optical path guiding structure is further used to: guide the second optical signal in the second return optical signal to the optical sensor,
  • the second return light signal is the light signal returned after the light-emitting display pixels in the first light-emitting area and the second light-emitting area both emit light and irradiate a finger;
  • the optical sensor is also used to: receive the second light-emitting area.
  • An optical signal, and the second optical signal is used to perform fingerprint recognition on the finger.
  • the area of the second light-emitting region is larger than the area of the first light-emitting region.
  • the area of the first light-emitting region is smaller than the field of view area of the optical sensor.
  • the first light-emitting area is located in a central area or an edge area of the fingerprint detection area.
  • the first area is symmetrically distributed with respect to the center point of the fingerprint detection area.
  • the first light-emitting area is a single connected area.
  • the first light-emitting area is square or circular.
  • the first light-emitting area includes a plurality of disconnected areas.
  • the first light-emitting area includes multiple strip-shaped areas or multiple ring-shaped areas.
  • the color of the light illuminating the finger emitted by the light-emitting display pixel of the second light-emitting area is any one of the following colors Species: pure red, pure green, pure cyan, pure white, gradient green, gradient cyan, and gradient white.
  • the optical path guiding structure includes an optical lens; or, the optical path guiding structure includes a plurality of collimating units or microhole arrays.
  • An optical collimator which is used to transmit the first optical signal to the corresponding optical sensing unit in the sensing array of the optical sensor through the plurality of collimating units or microhole arrays.
  • the light path guiding structure includes a microlens array having a plurality of microlenses and a light blocking layer having a plurality of microholes, the The microlens array is used to focus the first light signal through the plurality of microlenses to the corresponding microholes of the light blocking layer, and transmit the first light signals to the corresponding ones in the sensing array of the optical sensor through the microholes.
  • Optical sensing unit Optical sensing unit.
  • the optical sensor is configured to receive light signals in multiple directions, and the light signals in the multiple directions include light signals that are perpendicular to the display screen and/or light signals that are inclined to the display screen.
  • the fingerprint identification device further includes: a processor, configured to receive the first sensing area according to the first sensing area. The light intensity of the light signal determines whether the finger is a real finger.
  • the processor is further configured to determine that the finger is a real finger; if the light intensity of the first light signal received by the first sensing area is less than the preset value, the processor is further configured to determine The fingers are fake fingers.
  • an electronic device including: a fingerprint identification device, a display screen, and a processor as in the first aspect or any possible implementation of the first aspect, the display screen is used to display images, the The display screen includes a fingerprint detection area, the fingerprint detection area includes a first light-emitting area and a second light-emitting area; the processor is configured to: according to the first sensing area included in the optical sensor received the first The optical signal performs fingerprint anti-counterfeiting authentication on the finger.
  • a part of the non-luminous area is set in the fingerprint detection area.
  • the real finger will have transmitted light in this part, while the 2D fake fingerprint does not transmit light. Therefore, according to the fingerprint identification device and the non-luminous area
  • the light intensity of the light signal received by the corresponding sensing area can identify real fingers and 2D fake fingerprints, that is, the difference in light intensity can better defend against 2D fake fingerprint attacks, and further ensure the security of optical fingerprint recognition.
  • the processor is further configured to It is determined that the finger is a real finger; if the light intensity of the first light signal received by the first sensing area is less than the preset value, the processor is further configured to determine that the finger is a fake finger.
  • the optical sensor includes a second sensing area corresponding to the second light-emitting area
  • the processor is further configured to: Perform fingerprint recognition on the finger according to the first light signal received by the second sensing area.
  • the processor is further configured to: perform fingerprint recognition on the finger according to the second light signal received by the optical sensor , wherein the second optical signal is the optical signal guided to the optical sensor through the optical path guiding structure in the second return optical signal, and the second return optical signal is the first light-emitting area and the The light-emitting display pixels in the second light-emitting area all emit light and illuminate the light signal returned after the finger.
  • a fingerprint anti-counterfeiting method comprising: acquiring a first light signal of a finger touching a fingerprint detection area of a display screen, the fingerprint detection area including a first light-emitting area and a second light-emitting area,
  • a fingerprint identification device is provided under the display screen, the fingerprint identification device includes a light path guiding structure and an optical sensor, and the first light signal is a first return light signal that is guided to the optical sensor through the light path guiding structure
  • the first return light signal is the light signal returned after the light emitting display pixel in the first light emitting area does not emit light and the light emitted by the light emitting display pixel in the second light emitting area irradiates a finger
  • the The optical sensor includes a first sensing area corresponding to the first light-emitting area; according to the first light signal received by the first sensing area, fingerprint anti-counterfeiting authentication is performed on the finger.
  • the fingerprint anti-counterfeiting method of the embodiment of the present application is applied to an electronic device including a fingerprint recognition device under the screen.
  • the electronic device sets a part of the non-luminous area in the fingerprint detection area, and the real finger has transmitted light in this part, and 2D Fake fingerprints do not transmit light, so according to the light intensity of the light signal received by the sensing area corresponding to the non-luminous area in the fingerprint identification device, real fingers and 2D fake fingerprints can be identified, that is, the difference in light intensity can be used for better defense
  • the attack of 2D fake fingerprints can further ensure the security of optical fingerprint recognition.
  • the fingerprint anti-counterfeiting authentication of the finger according to the first optical signal received by the first sensing area includes: If the light intensity of the first light signal received by the first sensing area is greater than or equal to the preset value, it is determined that the finger is a real finger; if the light intensity of the first light signal received by the first sensing area is The light intensity is less than the preset value, and it is determined that the finger is a fake finger.
  • the optical sensor includes a second sensing area corresponding to the second light-emitting area, and the method further includes: The first light signal received by the second sensing area performs fingerprint recognition on the finger.
  • the method further includes: acquiring a second optical signal of the finger, where the second optical signal is a second return optical signal After passing through the optical path guiding structure and leading to the optical sensor in the optical signal, the second return optical signal is that the light-emitting display pixels in the first light-emitting area and the second light-emitting area both emit light and illuminate the finger The optical signal returned later; fingerprint recognition of the finger is performed according to the second optical signal received by the optical sensor.
  • an electronic device including: a storage unit and a processor, the storage unit is used to store instructions, the processor is used to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory The execution causes the processor to execute the third aspect or the method in any possible implementation manner of the third aspect.
  • a computer-readable medium for storing a computer program, and the computer program includes instructions for executing the third aspect or any possible implementation of the third aspect.
  • a computer program product including instructions is provided.
  • the computer runs the finger of the computer program product, the computer executes the fingerprint in the third aspect or any possible implementation of the third aspect.
  • Methods of identification and anti-counterfeiting can be run on the electronic device of the fourth aspect.
  • Fig. 1 is a schematic structural diagram of an electronic device to which the present application can be applied.
  • Fig. 2 is a schematic cross-sectional view of the electronic device shown in Fig. 1.
  • Fig. 3 is another schematic structural diagram of an electronic device to which the present application can be applied.
  • Fig. 4 is a schematic cross-sectional view of the electronic device shown in Fig. 3.
  • Fig. 5 is a schematic diagram of a light path generated by light irradiating a real finger that touches an electronic device.
  • Fig. 6 is a schematic diagram of a light path generated by a 2D fake finger irradiating light on the surface of an electronic device.
  • FIG. 7 is a schematic side view of the electronic device of the embodiment of the present application when performing fingerprint detection.
  • Fig. 8 is a schematic front view of an electronic device according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of fingerprinting on an electronic device with a 2D fake finger according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the shape and position of the fingerprint detection area and the first light-emitting area included in the embodiment of the present application.
  • FIG. 11 is a schematic diagram of the fingerprint detection area and the color of the first light-emitting area included in an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a fingerprint detection area used for fingerprint identification and fingerprint anti-counterfeiting according to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of two fingerprint detection areas respectively used for fingerprint identification and fingerprint anti-counterfeiting according to an embodiment of the present application.
  • Fig. 14 is a schematic flowchart of a fingerprint anti-counterfeiting method according to an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various electronic devices.
  • portable or mobile computing devices such as smartphones, notebook computers, tablet computers, and gaming devices, as well as other electronic devices such as electronic databases, automobiles, and bank automated teller machines (ATM).
  • ATM bank automated teller machines
  • the embodiment of the present application does not limit this.
  • biometric recognition technologies include, but are not limited to, fingerprint recognition, palmprint recognition, iris recognition, face recognition, and living body recognition.
  • fingerprint recognition technology for ease of description, the following uses fingerprint recognition technology as an example for description.
  • the under-screen fingerprint recognition technology refers to the installation of the fingerprint recognition module below the display screen, so as to realize the fingerprint recognition operation in the display area of the display screen, and there is no need to set a fingerprint collection area on the front of the electronic device except for the display area.
  • the fingerprint identification module uses light returned from the top surface of the display assembly of the electronic device to perform fingerprint sensing and other sensing operations. This returned light carries information about objects (such as fingers) that are in contact with or close to the top surface of the display assembly, and the fingerprint recognition module located below the display assembly collects and detects this returned light to realize fingerprint recognition under the screen.
  • the design of the fingerprint recognition module can be to realize the desired optical imaging by appropriately configuring the optical elements for collecting and detecting the returned light, so as to detect the fingerprint information of the finger.
  • in-display fingerprint recognition technology refers to the installation of fingerprint recognition modules or part of fingerprint recognition modules inside the display screen, so that fingerprint recognition operations can be performed in the display area of the display screen, without the need for electronic
  • the fingerprint collection area is set in the area on the front of the device except the display area.
  • FIG. 1 and FIG. 3 are schematic diagrams of the orientation of the electronic device 10
  • FIG. 2 and FIG. 4 are schematic cross-sectional diagrams of the electronic device 10 shown in FIG. 1 and FIG. 3, respectively.
  • the electronic device 10 may include a display screen 120 and an optical fingerprint recognition module 130.
  • the display screen 120 may be a self-luminous display screen, which uses a self-luminous display unit as a display pixel.
  • the display screen 120 may be an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen.
  • the display screen 120 may also be a 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 may also be specifically a touch-sensitive display screen, which can not only perform screen display, but also detect a user's touch or pressing operation, so as to provide the user with a human-computer interaction interface.
  • the electronic device 10 may include a touch sensor, and the touch sensor may specifically be a touch panel (TP), which may be provided on the surface of the display screen 120, or may be partially integrated or The whole is integrated into the display screen 120 to form the touch display screen.
  • TP touch panel
  • the optical fingerprint module 130 includes an optical fingerprint sensor, and the optical fingerprint sensor includes a sensing array 133 having a plurality of optical sensing units 131 (also referred to as optical sensing pixels, photosensitive pixels, pixel units, etc.).
  • the area where the sensing array 133 is located or its sensing area is the sensing area of the optical fingerprint module 130, which corresponds to the fingerprint detection area 103 on the display screen 120 (also called fingerprint collection area, fingerprint recognition area, etc.) .
  • the optical sensing unit 131 may be a photodetector, that is, the sensing array 133 may be a photodetector (Photodetector) array, which includes a plurality of photodetectors distributed in an array.
  • the optical fingerprint module 130 may be arranged in a partial area below the display screen 120.
  • the fingerprint detection area 103 may be located in the display area of the display screen 120, but the sensing area of the optical fingerprint module 130 may or may not be in the display area of the display screen 120.
  • the optical fingerprint module 130 may also be arranged in other positions, such as the side of the display screen 120 or the non-transparent area at the edge of the electronic device 10, that is, the optical fingerprint module.
  • the sensing area of 130 can be located in any area of the electronic device 10, and the optical signal from at least a part of the display area of the display screen 120 is guided to the sensing area of the optical fingerprint module 130 through a light path design.
  • the fingerprint detection area 103 touched by a finger is actually located in the display area of the display screen 120, and the sensing area of the optical fingerprint module 130 may or may not be in the display area of the display screen 120.
  • the electronic device 10 when the user needs to unlock the electronic device 10 or perform other fingerprint verification, he only needs to press his finger on the fingerprint detection area 103 of the display screen 120 to realize fingerprint input. Since fingerprint detection can be implemented in the screen, the electronic device 10 adopting the above structure does not need to reserve space on the front side to set a fingerprint button (such as the Home button), so that a full-screen solution can be adopted, that is, the display area of the display screen 120 It can be basically extended to the front of the entire electronic device 10.
  • a fingerprint button such as the Home button
  • the optical fingerprint module 130 may include a light detecting part 134 and an optical component 132.
  • the light detection part 134 includes the sensor array 133 (also referred to as an optical fingerprint sensor), a reading circuit and other auxiliary circuits electrically connected to the sensor array 133, which can be fabricated on a chip by a semiconductor process (Die), such as an optical imaging chip or an optical fingerprint sensor.
  • the optical component 132 may be disposed above the sensing array 133 of the light detecting part 134, and it may specifically include a filter layer (Filter), a light guide layer or a light path guiding structure, and other optical elements. It can be used to filter out ambient light penetrating the finger, and the light guide layer or light path guiding structure is mainly used to guide the reflected light reflected from the surface of the finger to the sensing array 133 for optical detection.
  • the optical assembly 132 and the light detecting part 134 may be packaged in the same optical fingerprint component.
  • the optical component 132 and the optical detection part 134 can be packaged in the same optical fingerprint chip, or the optical component 132 can be arranged outside the chip where the optical detection part 134 is located, for example, the optical component 132 It is attached above the chip, or part of the components of the optical assembly 132 is integrated into the chip.
  • the area or light sensing range of the sensing array 133 of the optical fingerprint module 130 corresponds to the fingerprint detection area 103 of the optical fingerprint module 130.
  • the fingerprint detection area 103 of the optical fingerprint module 130 (or the fingerprint detection area 103 on the display screen 120) may be equal to or not equal to the area or light of the area where the sensing array 133 of the optical fingerprint module 130 is located.
  • the sensing range is not specifically limited in the embodiment of this application.
  • the light path is guided by light collimation, and the fingerprint detection area 103 of the optical fingerprint module 130 can be designed to be substantially the same as the area of the sensing array of the optical fingerprint module 130.
  • the area of the fingerprint detection area 103 of the optical fingerprint module 130 can be made larger than that of the optical fingerprint module.
  • 130 is the area of the sensing array 133.
  • the light path guiding structure that the optical assembly 132 may include is exemplarily described below.
  • the optical collimator may specifically be a collimator made on a semiconductor silicon wafer (Collimator) Layer, which has a plurality of collimating units or micro-holes
  • the collimating unit may be specifically a small hole, among the reflected light reflected from the finger, the light that is perpendicularly incident on the collimating unit can pass through and be underneath
  • the light with an excessively large incident angle is attenuated by multiple reflections inside the collimating unit. Therefore, each sensor chip can basically only receive the reflected light reflected by the fingerprint pattern directly above it. Effectively improve the image resolution, thereby improving the fingerprint recognition effect.
  • the optical path guiding structure may be an optical lens (Lens) layer, which has one or more lens units, such as one or more aspheric lenses
  • the lens group is used to condense the reflected light reflected from the finger to the sensing array 133 of the light detection part 134 below it, so that the sensing array 133 can perform imaging based on the reflected light, thereby obtaining the Finger fingerprint image.
  • the optical lens layer may also have a pinhole or a micro-aperture formed in the optical path of the lens unit, for example, one or more light-shielding sheets may be formed in the optical path of the lens unit, of which at least A light-shielding sheet may be formed with light-transmitting micro-holes in the optical axis or optical center area of the lens unit, and the light-transmitting micro-holes may serve as the aforementioned pinholes or micro-apertures.
  • the pinhole or micro-aperture diaphragm can cooperate with the optical lens layer and/or other optical film layers above the optical lens layer to expand the field of view of the optical fingerprint module 130 to improve the optical fingerprint module 130 Fingerprint imaging effect.
  • the light path guiding structure may be a microlens array formed by a plurality of microlenses, which may be passed through a semiconductor growth process Or other processes are formed above the sensing array 133 of the light detecting part 134, and each microlens may correspond to one or more sensing units of the sensing array 133, respectively.
  • other optical film layers may be formed between the micro lens layer and the sensing unit, such as a dielectric layer or a passivation layer.
  • a light blocking layer (or called a light blocking layer, a light blocking layer, etc.) with micro holes (or called openings) may also be included between the micro lens layer and the sensing unit, wherein the micro A hole is formed between the corresponding microlens and the sensing unit, the light blocking layer can block the optical interference between the adjacent microlens and the sensing unit, and make the light corresponding to the sensing unit converge through the microlens To the inside of the micro-hole and transmit it to the sensing unit via the micro-hole for optical fingerprint imaging; or, by adjusting the position of the light-blocking layer or the position of the micro-holes included in the light-blocking layer, the display
  • the oblique light signals in multiple directions reflected by the finger above the screen 120 are condensed by the microlens layer, and then are transmitted to the plurality of sensing units after passing through openings provided in at least one light-blocking layer.
  • the signal is used to detect the fingerprint information of the finger. That is to say, the sensor array 133 of the light detecting part 134 below can receive light signals in multiple directions through the microlens array and the light blocking layer with multiple microholes.
  • the light signals in multiple directions can include The optical signal perpendicular to the display screen and/or the optical signal inclined with respect to the display screen is not limited to this in the embodiment of the present application.
  • a micro lens layer may be further provided above or below the collimator layer or the optical lens layer.
  • a micro lens layer may be further provided above or below the collimator layer or the optical lens layer.
  • the optical component 132 may also include other optical elements, such as filters or other optical films, which may be arranged between the optical path guiding structure and the optical fingerprint sensor or arranged at all.
  • the display screen 120 and the optical path guide structure are mainly used to isolate the influence of external interference light on the optical fingerprint detection.
  • the filter layer may be used to filter out the ambient light that penetrates the finger and enters the optical fingerprint sensor through the display screen 120. Similar to the light path guiding structure, the filter layer may be specific to each The optical fingerprint sensors are separately arranged to filter out interference light, or a large-area filter layer can also be used to simultaneously cover the multiple optical fingerprint sensors.
  • the fingerprint identification module 130 may be used to collect user fingerprint information (such as fingerprint image information).
  • the optical fingerprint module 130 can use the display unit (ie, the OLED light source) of the OLED display 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection.
  • the display unit ie, the OLED light source
  • the display screen 120 emits a beam of light 111 to the target finger 140 above the fingerprint detection area 103.
  • the light 111 is reflected on the surface of the finger 140 to form reflected light or pass through all the fingers.
  • the finger 140 scatters inside to form scattered light (transmitted light).
  • the above-mentioned reflected light and scattered light are collectively referred to as return light. Since the ridge 141 and valley 142 of the fingerprint have different light reflection capabilities, the return light 151 from the fingerprint ridge and the return light 152 from the fingerprint valley have different light intensities, and the return light passes through the optical component 132. Then, it is received by the sensing array 133 in the optical fingerprint module 130 and converted into a corresponding electrical signal, that is, a fingerprint detection signal; based on the fingerprint detection signal, fingerprint image data can be obtained, and fingerprint matching verification can be further performed, thereby The electronic device 10 realizes the optical fingerprint recognition function.
  • the optical fingerprint module 130 may also use a built-in light source or an external light source to provide an optical signal for fingerprint detection and identification.
  • the optical fingerprint module 130 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 fingerprint system of the electronic device 10 may also include an excitation light source for optical fingerprint detection.
  • the light source may specifically be an infrared light source or a light source of invisible light of a specific wavelength, which may be arranged under the backlight module of the liquid crystal display or arranged in the edge area under the protective cover of the electronic device 10, and the optical fingerprint module 130 can be arranged under the edge area of the liquid crystal panel or the protective cover and guided by the light path so that the fingerprint detection light can reach the optical fingerprint module 130; or, the optical fingerprint module 130 can also be arranged on the backlight module Below, and the backlight module is designed to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint module 130 by perforating film layers such as diffuser, brightness enhancement film, reflective film, etc. .
  • the optical fingerprint module 130 adopts a built-in light source or an external light source
  • the electronic device 10 may further include a transparent protective cover plate, which may be a glass cover plate or a sapphire cover plate, which is located above the display screen 120 and covers the front surface of the electronic device 10 . Therefore, in the embodiments of the present application, the so-called finger pressing on the display screen 120 actually refers to pressing on the cover plate above the display screen 120 or covering the surface of the protective layer of the cover plate.
  • a transparent protective cover plate which may be a glass cover plate or a sapphire cover plate
  • the optical fingerprint module 130 may include only one optical fingerprint sensor.
  • the fingerprint detection area 103 of the optical fingerprint module 130 has a small area and a fixed position. Therefore, the user needs to press his finger when performing fingerprint input. Go to the specific position of the fingerprint detection area 103, otherwise the optical fingerprint module 130 may not be able to collect fingerprint images, resulting in poor user experience.
  • the optical fingerprint module 130 may specifically include a plurality of optical fingerprint sensors. The plurality of optical fingerprint sensors may be arranged side by side under the display screen 120 in a splicing manner, and the sensing areas of the plurality of optical fingerprint sensors collectively constitute the sensing area of the optical fingerprint module 130. The area corresponds to the fingerprint detection area 103 of the display screen 120.
  • the fingerprint detection area 103 corresponding to the optical fingerprint module 130 can be extended to the main area of the lower half of the display screen, that is, to the area where the finger is habitually pressed, so as to realize the blind fingerprint input operation. Further, when the number of optical fingerprint sensors is sufficient, the fingerprint detection area 103 can also be extended to half of the display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.
  • the optical fingerprint module 130 in the electronic device 10 may include a plurality of optical fingerprint sensors, and the plurality of optical fingerprint sensors may be arranged side by side on the display screen 120 by means such as splicing. Below, and the sensing areas of the multiple optical fingerprint sensors collectively constitute the fingerprint detection area 103 of the optical fingerprint device 130.
  • the optical component 132 may include a plurality of light path guiding structures, and each light path guiding structure corresponds to an optical fingerprint sensor (ie, the sensing array 133), and is respectively attached and arranged above the corresponding optical fingerprint sensor.
  • the plurality of optical fingerprint sensors may also share an overall optical path guiding structure, that is, the optical path guiding structure has an area large enough to cover the sensing array of the plurality of optical fingerprint sensors.
  • the optical fingerprint module 130 when it includes multiple optical fingerprint sensors, it may be the optical collimator of each optical fingerprint sensor.
  • One optical sensing unit in the sensing array is configured with one or more collimating units, and is attached and arranged above the corresponding optical sensing unit.
  • the multiple optical sensing units can also share one collimating unit, that is, the one collimating unit has an aperture large enough to cover the multiple optical sensing units. Since one collimating unit can correspond to multiple optical sensing units or one optical sensing unit corresponds to multiple collimating units, the correspondence between the spatial period of the display screen 120 and the spatial period of the optical fingerprint sensor is destroyed.
  • the spatial structure of the light-emitting display array is similar to the spatial structure of the optical sensing array of the optical fingerprint sensor. It can also effectively prevent the optical fingerprint module 130 from using the light signal passing through the display 120 to perform fingerprint imaging to generate moiré fringes, which effectively improves the optical fingerprint model. Group 130 fingerprint recognition effect.
  • one optical lens may be configured for each sensor chip for fingerprint imaging, or one may be configured for multiple sensor chips.
  • Optical lens to achieve light convergence and fingerprint imaging. Even when a sensor chip has two sensing arrays (Dual Array) or multiple sensing arrays (Multi-Array), the sensor chip can also be equipped with two or more optical lenses to cooperate with the two sensing arrays or Multiple sensing arrays perform optical imaging, thereby reducing the imaging distance and enhancing the imaging effect.
  • FIGS. 1 to 4 are only examples of the present application, and should not be construed as limiting the present application.
  • the optical fingerprint module 130 may include a plurality of fingerprint sensors distributed in a square or circular shape.
  • the electronic device 10 shown in Figs. 1 to 4 is still taken as an example.
  • the display screen 120 includes The light-emitting display pixels are used to provide a light source for fingerprint recognition, so the light emitted (that is, the incident light represented by the solid line in FIG. 5) illuminates the finger 140, and it may be reflected at the fingerprint ridge and fingerprint valley on the surface of the finger 140
  • transmission, corresponding to the reflected light represented by the dashed line and the transmitted light represented by the dashed line in FIG. 5, that is to say, the light that the optical fingerprint module 130 can receive may include the reflected light on the surface of the finger and the transmitted light inside the finger.
  • the 2D fake finger is a plane, and it is still assumed
  • the light-emitting display pixels included in the display screen 120 are used to provide a light source for fingerprint recognition, so after the fake finger is illuminated by the light emitted from it, only reflected light will be generated. That is to say, the light that the optical fingerprint module 130 can receive includes the light sourced from the fake finger. The reflected light of the fingerprint itself, excluding the transmitted light.
  • the embodiment of the present application proposes a fingerprint anti-counterfeiting method, a fingerprint identification device, and an electronic device to perform fingerprint recognition and fingerprint anti-counterfeiting authentication based on the difference between the transmitted light of a real finger and a 2D fake fingerprint.
  • FIG. 7 shows a partial schematic diagram of an electronic device 20 according to an embodiment of the present application.
  • FIG. 7 is a side view of the electronic device 20;
  • FIG. 8 shows a front view of the electronic device 20 according to an embodiment of the present application.
  • the electronic device 20 includes a display screen 200 and a fingerprint identification device 300, and the display screen 200 is located above the fingerprint identification device 300.
  • the display screen 200 in FIG. 7 may represent a part of the display screen 200, rather than the actual size and size of the display screen 200;
  • FIG. 8 shows a front view of the display screen 200.
  • the display screen 200 may correspond to the display screen 120 in the electronic device 10 described in FIG. 1 and FIG. 2, and is suitable for the related description of the display screen 120 described above. For the sake of brevity, it will not be repeated here.
  • the electronic device 20 of the embodiment of the present application is described by taking the display screen 200 including a number of light-emitting display pixels capable of self-luminous as an example, and the light-emitting display pixels can be used to display images.
  • the display screen 200 includes a fingerprint detection area 210 for finger pressing, that is, when the user needs to unlock the electronic device 20 or perform other fingerprint recognition, he only needs to press his finger on the
  • the fingerprint detection area 210 can realize fingerprint input.
  • the fingerprint detection area 210 may correspond to the fingerprint detection area 103 in the electronic device 10 described in FIG. 1 to FIG. 4, and is applicable to the relevant description of the fingerprint detection area 103 described above. For the sake of brevity, it will not be repeated here.
  • the display screen 200 includes a plurality of light-emitting display pixels, the display screen 200 includes a fingerprint detection area 210, and the fingerprint detection area 210 further includes a first light-emitting area 211 and a second light-emitting area. Area 212, the first light-emitting area 211 and the second light-emitting area 212 do not overlap.
  • the fingerprint identification device 300 is provided under the display screen 200 of the terminal device 20 in the embodiment of the present application, and the fingerprint identification device 300 may be used to receive the light signal returned by the finger.
  • the fingerprint identification device 300 may include an optical path guiding structure and an optical sensor, and the optical sensor is arranged under the optical path guiding structure.
  • the light path guiding structure is used to guide the first light signal in the first return light signal to the optical sensor, where the first return light signal is that the light-emitting display pixel in the first light-emitting region 211 does not emit light and the second light-emitting area 211 does not emit light and the second light signal
  • the light emitted by the light-emitting display pixels in the light-emitting area 212 illuminates the light signal returned by the finger;
  • the optical sensor is used to receive the first light signal, and the optical sensor includes a first sensing area corresponding to the first light-emitting area.
  • the first optical signal received by the first sensing area is used for fingerprint anti-counterfeiting authentication.
  • the light-emitting display pixels in the first light-emitting area 211 in the fingerprint detection area 210 do not emit light
  • the light-emitting display pixels in the second light-emitting area 212 emit light
  • the light irradiates the finger and generates the first return light signal
  • a part of the light drawing in the first return light signal is guided by the light path and then transmitted to the optical sensor, and a part of the light drawing in the first return light signal is blocked by the light path guiding structure and cannot be transmitted to the optical sensor.
  • the part of the first return light signal that can be transmitted to the optical sensor is called the first light signal, that is, the first light signal is guided to the optical sensor after passing through the optical path guiding structure, and the sensing area of the optical sensor includes the first light emitting signal.
  • the area 211 corresponds to the first sensing area, and the portion of the first optical signal received by the first sensing area can be used for fingerprint anti-counterfeiting authentication.
  • the finger touching the fingerprint detection area 210 is a real finger
  • the light emitted by the illuminated second light-emitting area returns after the propagation of the finger, and there can be more transmitted light in and out.
  • the first sensing area corresponding to the lit first light-emitting area is received; but in the case of a 2D fake fingerprint, as shown in FIG. 9, the light received by the first sensing area corresponding to the first light-emitting area mainly depends on the fake fingerprint. No matter under the action of the oblique receiving light path or the vertical receiving light path, no or only a very small amount of light can be received at the position of the first sensing area.
  • the intensity of the real finger is greater than that of the 2D fake fingerprint, so that the authenticity fingerprint can be distinguished from the fake fingerprint based on this feature.
  • the electronic device 20 or the fingerprint identification device 300 may include a processor, and the processor may be used to perform fingerprint anti-counterfeiting authentication.
  • the processor may be configured to: if the light intensity of the first light signal received by the first sensing area is greater than or equal to a preset value, determine that the finger touching the fingerprint detection area 210 is a real finger; The light intensity of the first light signal received by a sensing area is less than the preset value, and it is determined that the finger is a fake finger.
  • the fingerprint identification device 300 of the embodiment of the present application may correspond to the optical fingerprint identification module 130 in the electronic device 10 described in FIGS. 1 to 4, and is suitable for the above-mentioned related description of the optical fingerprint identification module 130;
  • the optical path guiding structure in the fingerprint identification device 300 may correspond to the optical component 132 in the electronic device 10 described in FIGS. 1 to 4, and is applicable to the above-mentioned related description about the optical component 132, for example, it may specifically correspond to The optical path guiding structure in the optical component 132 is suitable for related description;
  • the optical sensor in the fingerprint identification device 300 may correspond to the optical fingerprint sensor in the electronic device 10 described in FIGS.
  • the optical sensor in 300 may be the light detecting part 134 in the above electronic device 10, which is suitable for the above-mentioned related description about the light detecting part 134, for the sake of brevity, it will not be repeated here.
  • the optical path guide structure in the embodiment of the present application can be used to receive vertical light signals and/or oblique light signals, the relative position between the position of the fingerprint detection area 210 and the position of the sensing area of the fingerprint identification device 300 and the two There may be many situations due to the difference of the light path. For example, if the optical path guiding structure only receives vertical light signals, the fingerprint detection area 210 may be located directly above the sensing area of the fingerprint identification device 300, and the areas of the two may be equal; for another example, if the optical path guiding structure can receive multiple directions The fingerprint detection area 210 may be located obliquely above the sensing area of the fingerprint identification device 300, and the areas of the two may not be equal.
  • the first light-emitting area in the fingerprint detection area 210 and the fingerprint identification device 300 are not fixed.
  • the relative position and area of the first sensing area of the optical sensor may also be different, and the comparison of the embodiments of the present application is not limited.
  • the shape of the fingerprint detection area 210 in the embodiment of the present application can be set according to actual applications, and can be set to any regular or irregular shape.
  • the fingerprint detection area 210 is a circle as an example; or, as shown in FIG. 10, the fingerprint detection area 210 may also have other shapes, such as the square shown in the first row in FIG. 10.
  • the first light-emitting area 211 and the second light-emitting area 212 in the embodiment of the present application can also be set to the same or different arbitrary shapes.
  • a reasonable design of the shape of the first light-emitting area 211 can ensure that strong real finger transmitted light is extracted in the corresponding first sensing area, and the reflected light signal of the 2D fake fingerprint is weaker here, and there is no transmission.
  • Light forms the difference between true and false. Any spot shape that can extract the difference can be distinguished between true and false.
  • the fingerprint detection area 210 is circular
  • the shape of the first light-emitting area 211 as shown in FIG. 8 is better.
  • the first light-emitting area 211 represents the first light-emitting area 211, where, as shown in the four diagrams in the first two rows of FIG. 10 and FIG. 8, the first light-emitting area 211 can be set as a single connected area; for another example, As shown in the two diagrams in the last row of FIG. 10, the first light-emitting area 211 may also be set to include multiple disconnected areas, for example, as shown in FIG. 10, it includes multiple strip-shaped areas or multiple ring-shaped areas.
  • the first light-emitting area 211 is circular, and the second light-emitting area 212 is ring-shaped as an example.
  • the fingerprint detection area shown in FIG. 10 the black part in each figure in FIG. 10 represents the first light-emitting area 211, and the first light-emitting area 211 may also be circular, square or other shapes.
  • the first light-emitting area 211 The second light-emitting area 212 is a part of the fingerprint detection area excluding the first light-emitting area 211.
  • the relative position of the first light-emitting area 211 in the fingerprint detection area 210 may be set according to actual applications, and may be set at any position in the fingerprint detection area 210.
  • the first light-emitting area 211 may be located in the central area of the fingerprint detection area 210; or, the first light-emitting area 211 may also be located anywhere on the edge of the fingerprint detection area 210; or, The first area 211 may also be distributed symmetrically with respect to the center point of the fingerprint detection area 211, and the embodiment of the present application is not limited thereto.
  • the size of the area of the first light-emitting area 211 and the second light-emitting area 212 in the embodiment of the present application can be set according to actual applications.
  • the area of the second light-emitting region 212 may be set to be greater than or equal to the area of the first light-emitting region 211.
  • the area of the first light-emitting region 211 may also be set to be smaller than or equal to the field of view area of the optical sensor, and the embodiment of the present application is not limited to this.
  • the light-emitting display pixels of the second light-emitting area 212 emit light, and the color of the light can be adjusted according to the actual application.
  • Settings for example, can be set to a solid color or a gradient color.
  • the white light source is R/G/B three-color composite light, so under the superposition of the three-color light, the distinction between true and false is greater, so the color of the light is preferably white, for example, as shown in the left picture of Figure 11, you can set It is gradual white; or as shown in the right picture of Figure 11, it can also be set to pure white.
  • the light-emitting display pixels of the second light-emitting area 212 emit light.
  • the color of the light irradiating the finger may be any one of the following colors: pure red, pure green, pure cyan, pure white, gradient green, gradient cyan, and gradient white.
  • the fingerprint identification device 300 can perform fingerprint anti-counterfeiting authentication under the action of the first light-emitting area 211 and the second light-emitting area 212.
  • the fingerprint identification device 300 can also be used for fingerprint recognition.
  • the optical sensor in the fingerprint identification device 300 may further include a second sensing area corresponding to the second light emitting area 212, and the first light received by the second sensing area
  • the signal is used to fingerprint the finger. That is to say, fingerprint identification and fingerprint anti-counterfeiting authentication can be realized by using a fingerprint collection process.
  • the fingerprint detection area can be divided into two parts for use. One is the non-luminous first light-emitting area, which corresponds to the first light-emitting area. The light signal collected by the sensing area is used for fingerprint anti-counterfeiting, the other part is a second light emitting area that emits light, and the light signal collected by the corresponding second sensing area is used for fingerprint imaging and fingerprint matching.
  • the fingerprint detection area 210 includes the first light-emitting area 211, that is, as shown in the black area B in FIG. 12; in addition, the fingerprint detection area 210 includes The second light-emitting area 212.
  • the second light-emitting area 212 may be all or part of the fingerprint detection area 210 except the first light-emitting area 211.
  • the second light-emitting area 212 may be white as shown in FIG. Area A is shown, or area A plus area C can also be shown, where area A and area C can emit light of the same or different colors, and area B does not emit light.
  • the optical signal collected by the first sensing area corresponding to the first light-emitting area 211 (that is, area B) is used for fingerprint anti-counterfeiting; the second light signal corresponding to the second light-emitting area 212 (that is, area A or area A+C)
  • the optical signal collected in the measurement area is used for fingerprint identification.
  • the area, position, and shape of the first light-emitting region 211 can be arbitrarily set according to actual applications.
  • fingerprint imaging is required, that is, a sufficiently large and effective fingerprint image is obtained, so the area of the second light-emitting area is usually set to be larger than the area of the first light-emitting area.
  • the first light-emitting area is usually set at the edge position of the fingerprint detection area, but the embodiment of the present application is not limited to this.
  • the optical path guiding structure in the fingerprint identification device 300 is further used to guide the second optical signal in the second return optical signal to the optical sensor, and the second return optical signal is The light-emitting display pixels in the first light-emitting area and the second light-emitting area both emit light and illuminate the light signal returned by the finger; the optical sensor in the fingerprint identification device 300 is also used to: receive the second light signal, and the second light signal The optical signal is used for fingerprint recognition of the finger. That is, at least two fingerprint collection processes are used to realize fingerprint identification and fingerprint anti-counterfeiting authentication, wherein at least one fingerprint collection realizes fingerprint recognition, and at least one fingerprint collection realizes fingerprint anti-counterfeiting authentication.
  • the fingerprint identification device 300 needs to perform two collections, one for fingerprint recognition, and one for fingerprint anti-counterfeiting authentication.
  • the order of execution of the two can be set arbitrarily .
  • the first light-emitting area 211 in the fingerprint detection area 210 does not emit light, and the second light-emitting area 212 emits light, thereby obtaining the first light signal;
  • the first optical signal received by the detection area can be used for fingerprint anti-counterfeiting.
  • the process of fingerprint identification and authentication as shown in the right figure of FIG.
  • the fingerprint detection area 210 emits light, that is, the first light-emitting area 211 and the second light-emitting area 212 in the fingerprint detection area 210 both emit light, thereby obtaining the second light signal.
  • the fingerprint identification device 300 performs fingerprint identification according to the second light signal.
  • FIG. 13 is only an example, in which the right diagram of FIG. 13 shows possible lighting methods in the fingerprint recognition process, that is, for the fingerprint detection area 210 in the fingerprint recognition process shown in the right diagram
  • Other lighting methods can also be used.
  • other patterns of lighting may be used, that is, the fingerprint recognition process in the right figure of Figure 13 may also use partial lighting; or, multiple lighting methods may be used to collect multiple times correspondingly.
  • Fingerprint image to realize the fingerprint recognition process.
  • fingerprint anti-counterfeiting authentication can also be added in the fingerprint identification process, that is, the fingerprint anti-counterfeiting authentication process can be added to the fingerprint identification process in the right figure of FIG.
  • At least two anti-counterfeiting authentications can be carried out to improve the security level.
  • the method shown in FIG. 12 can be used to perform fingerprint anti-counterfeiting authentication plus fingerprint identification
  • the method shown in the left figure of FIG. 13 can be used to perform fingerprint anti-counterfeiting authentication again, but the embodiment of the present application is not limited to this.
  • the area, position, and shape of the fingerprint detection area 210 and the first light-emitting area 211 shown in the left figure can also be set according to actual applications.
  • the area of the first light-emitting area 211 can be set to be smaller than the area of the field of view of the fingerprint recognition device 300, but the embodiment of the present application is not limited to this.
  • the first embodiment described above only needs to collect a fingerprint image once. Compared with the second embodiment, the fingerprint identification and anti-counterfeiting process is quicker and simpler. However, it is necessary to realize both fingerprint identification and fingerprint anti-counterfeiting through one collection.
  • the relationship between the first light-emitting area 211 and the second light-emitting area 212 in the fingerprint detection area 210 is set reasonably to ensure the accuracy and precision of fingerprint identification and fingerprint anti-counterfeiting; while in the second embodiment, fingerprints need to be performed at least twice Collection to realize the fingerprint identification process and the fingerprint anti-counterfeiting process can ensure that the two processes are more accurate, and have no or little influence on each other, and the location and area of the first light-emitting area 211 in the fingerprint detection area 210 are more flexible.
  • the fingerprint identification device 300 uses the self-luminous display pixels of the display screen 120 as the light source as an example, that is, the fingerprint detection area 210 includes the first light-emitting area 211 and the second light-emitting area 212 includes the light-emitting display pixels
  • the fingerprint identification device 300 may also use other light sources, for example, an external light source is used as an excitation light source for fingerprint detection.
  • an external light source is used as an excitation light source for fingerprint detection.
  • the light signal emitted by the light source for fingerprint detection forms a corresponding light spot on the display screen 200.
  • the light spot may correspond to the fingerprint detection area 210 in the embodiment of this application, which is suitable for the above-mentioned fingerprint detection.
  • the related description of the area 210 for example, when the first light-emitting area 211 in the fingerprint detection area 210 does not emit light, it means that the corresponding position in the light spot does not emit light. For the sake of brevity, it will not be listed here.
  • a part of the non-luminous area is set in the fingerprint detection area.
  • the real finger will have transmitted light in this part, while the 2D fake fingerprint has no transmitted light. Therefore, according to the fingerprint identification device and
  • the light intensity of the light signal received by the sensing area corresponding to the non-luminous area can identify real fingers and 2D fake fingerprints, that is, the difference in light intensity can better defend against 2D fake fingerprint attacks, which can further ensure the safety of optical fingerprint recognition Sex.
  • FIG. 14 shows a schematic flowchart of a fingerprint anti-counterfeiting method 400 according to an embodiment of the present application.
  • the method 400 may be executed by an electronic device having a display screen.
  • the electronic device may be the above-mentioned electronic device 10 or 20.
  • the electronic device 10 or 20 may include a processor or a processing unit;
  • the fingerprint identification device 300 may include a processor or a processing unit for executing the method 400.
  • the method 400 includes:
  • a fingerprint recognition device is provided under the display screen, and the fingerprint recognition device includes a light path A guiding structure and an optical sensor, the first light signal is a light signal guided to the optical sensor through the optical path guiding structure in the first return light signal, and the first return light signal is a light-emitting display pixel in the first light-emitting area No light is emitted and the light emitted by the light-emitting display pixel in the second light-emitting area irradiates a finger with a light signal returned, the optical sensor includes a first sensing area corresponding to the first light-emitting area;
  • S420 Perform fingerprint anti-counterfeiting authentication on the finger according to the first optical signal received by the first sensing area.
  • performing fingerprint anti-counterfeiting authentication on the finger based on the first light signal received by the first sensing area includes: if the first light received by the first sensing area If the light intensity of the signal is greater than or equal to the preset value, it is determined that the finger is a real finger; if the light intensity of the first light signal received by the first sensing area is less than the preset value, it is determined that the finger is a fake finger.
  • the optical sensor includes a second sensing area corresponding to the second light-emitting area
  • the method 400 further includes: according to the first light signal received by the second sensing area, The finger performs fingerprint recognition.
  • the method 400 further includes: acquiring a second optical signal of the finger, where the second optical signal is the light guided to the optical sensor after passing through the optical path guiding structure in the second return optical signal.
  • the second return light signal is the light signal returned after the light-emitting display pixels in the first light-emitting area and the second light-emitting area both emit light and irradiate a finger; according to the second light signal received by the optical sensor, The finger performs fingerprint recognition.
  • the fingerprint anti-counterfeiting method of the embodiment of the present application is applied to an electronic device including a fingerprint recognition device under the screen.
  • the electronic device sets a part of the non-luminous area in the fingerprint detection area, and the real finger has transmitted light in this part, and 2D Fake fingerprints do not transmit light, so according to the light intensity of the light signal received by the sensing area corresponding to the non-luminous area in the fingerprint identification device, real fingers and 2D fake fingerprints can be identified, that is, the difference in light intensity can be used for better defense
  • the attack of 2D fake fingerprints can further ensure the security of optical fingerprint recognition.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It 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, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Optics & Photonics (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un procédé anti-contrefaçon d'empreintes digitales, un dispositif d'identification d'empreintes digitales (300) et un dispositif électronique (20), qui permettent de mieux se défendre contre des attaques avec de fausses empreintes digitales 2D. Le dispositif d'identification d'empreintes digitales (300) est disposé au-dessous d'un écran d'affichage (200) du dispositif électronique, une zone de détection d'empreintes digitales (210) de l'écran d'affichage (200) comprend une première zone électroluminescente (211) et une seconde zone électroluminescente (212), et le dispositif d'identification d'empreintes digitales (300) comprend : une structure de guidage de trajet optique pour guider un premier signal optique dans un premier signal optique de retour vers un capteur optique, le premier signal de lumière de retour étant un signal optique renvoyé après que le doigt a été irradié par la lumière émise par des pixels d'affichage électroluminescents dans la seconde zone d'émission de lumière (212) et lorsque des pixels d'affichage électroluminescents dans la première zone électroluminescente (211) n'émettent pas de lumière ; et le capteur optique pour recevoir le premier signal optique, le capteur optique comprenant une première zone de détection correspondant à la première zone électroluminescente (211), et le premier signal optique reçu par la première zone de détection étant utilisé pour une authentification anti-contrefaçon d'empreintes digitales.
PCT/CN2020/070526 2020-01-06 2020-01-06 Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique WO2021138776A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080001549.6A CN111837128A (zh) 2020-01-06 2020-01-06 指纹防伪的方法、指纹识别装置和电子设备
PCT/CN2020/070526 WO2021138776A1 (fr) 2020-01-06 2020-01-06 Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/070526 WO2021138776A1 (fr) 2020-01-06 2020-01-06 Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique

Publications (1)

Publication Number Publication Date
WO2021138776A1 true WO2021138776A1 (fr) 2021-07-15

Family

ID=72918744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/070526 WO2021138776A1 (fr) 2020-01-06 2020-01-06 Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique

Country Status (2)

Country Link
CN (1) CN111837128A (fr)
WO (1) WO2021138776A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022106458A (ja) * 2021-01-07 2022-07-20 株式会社ジャパンディスプレイ 生体認証装置
TWI799071B (zh) 2021-03-03 2023-04-11 神盾股份有限公司 屏下指紋感測裝置以及指紋感測方法
CN112906612B (zh) * 2021-03-05 2024-02-13 深圳市汇顶科技股份有限公司 指纹识别装置和电子设备
WO2022183511A1 (fr) * 2021-03-05 2022-09-09 深圳市汇顶科技股份有限公司 Appareil de reconnaissance d'empreinte digitale et dispositif électronique
WO2022188041A1 (fr) * 2021-03-09 2022-09-15 深圳市汇顶科技股份有限公司 Appareil d'identification d'empreintes digitales, dispositif électronique et procédé de détection de lumière ambiante
CN112860120B (zh) * 2021-03-09 2024-06-28 深圳市汇顶科技股份有限公司 指纹识别装置、电子设备和环境光检测的方法
US11620852B2 (en) * 2021-09-08 2023-04-04 Omnivision Technologies, Inc. Method for detecting spoof fingerprints with an under-display fingerprint sensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100098302A1 (en) * 2008-10-20 2010-04-22 Union Community Co., Ltd. Apparatus for distinguishing forged fingerprint and method thereof
US20140286548A1 (en) * 2013-03-21 2014-09-25 Suprema Inc Method and apparatus for identifying fake fingerprint
CN105989342A (zh) * 2015-02-17 2016-10-05 上海箩箕技术有限公司 指纹识别装置以及指纹识别系统
CN107820617A (zh) * 2017-09-30 2018-03-20 深圳市汇顶科技股份有限公司 指纹识别的方法、装置和终端设备
CN109934137A (zh) * 2019-02-28 2019-06-25 维沃移动通信有限公司 一种光电指纹识别装置、终端及指纹识别方法
CN110520863A (zh) * 2018-03-27 2019-11-29 深圳市汇顶科技股份有限公司 利用屏下光学传感器模块对指纹进行三维光学形貌感测

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3479295A4 (fr) * 2016-09-17 2019-12-04 Shenzhen Goodix Technology Co., Ltd. Module de capteur optique de sous-écran permettant la détection d'empreintes digitales sur écran
CN109522697B (zh) * 2018-12-29 2022-01-18 联想(北京)有限公司 电子设备以及指纹识别模组
CN210142340U (zh) * 2019-02-02 2020-03-13 深圳市汇顶科技股份有限公司 指纹识别装置和电子设备
CN110582780A (zh) * 2019-08-01 2019-12-17 深圳市汇顶科技股份有限公司 指纹识别和防伪的方法、装置和电子设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100098302A1 (en) * 2008-10-20 2010-04-22 Union Community Co., Ltd. Apparatus for distinguishing forged fingerprint and method thereof
US20140286548A1 (en) * 2013-03-21 2014-09-25 Suprema Inc Method and apparatus for identifying fake fingerprint
CN105989342A (zh) * 2015-02-17 2016-10-05 上海箩箕技术有限公司 指纹识别装置以及指纹识别系统
CN107820617A (zh) * 2017-09-30 2018-03-20 深圳市汇顶科技股份有限公司 指纹识别的方法、装置和终端设备
CN110520863A (zh) * 2018-03-27 2019-11-29 深圳市汇顶科技股份有限公司 利用屏下光学传感器模块对指纹进行三维光学形貌感测
CN109934137A (zh) * 2019-02-28 2019-06-25 维沃移动通信有限公司 一种光电指纹识别装置、终端及指纹识别方法

Also Published As

Publication number Publication date
CN111837128A (zh) 2020-10-27

Similar Documents

Publication Publication Date Title
WO2021138776A1 (fr) Procédé anti-contrefaçon d'empreintes digitales, dispositif d'identification d'empreintes digitales et dispositif électronique
CN213182770U (zh) 指纹识别装置和电子设备
US11030434B2 (en) Lens-pinhole array designs in ultra thin under screen optical sensors for on-screen fingerprint sensing
WO2021146976A1 (fr) Appareil de détection d'empreintes digitales et dispositif électronique
WO2021017014A1 (fr) Procédé et appareil de reconnaissance d'empreintes digitales et anticontrefaçon, et dispositif électronique
WO2020181489A1 (fr) Dispositif de reconnaissance d'empreinte digitale, procédé de reconnaissance d'empreinte digitale et dispositif électronique
WO2021072753A1 (fr) Appareil de détection d'empreintes digitales et dispositif électronique
WO2021077259A1 (fr) Procédé de reconnaissance d'empreintes digitales, dispositif de reconnaissance d'empreintes digitales et appareil électronique
CN109154869A (zh) 用于屏上指纹感应的屏下光学传感器模块的光学准直器
CN210295125U (zh) 指纹检测装置和电子设备
CN111108511A (zh) 指纹检测装置和电子设备
WO2020168495A1 (fr) Procédé et dispositif de reconnaissance d'empreinte digitale et dispositif terminal
WO2021184269A1 (fr) Appareil de reconnaissance d'empreintes digitales et dispositif électronique
CN111108509B (zh) 指纹检测装置和电子设备
CN112528953B (zh) 指纹识别装置、电子设备和指纹识别的方法
WO2020186415A1 (fr) Dispositif et procédé de reconnaissance d'empreinte digitale, et appareil électronique
CN211529170U (zh) 指纹识别装置和电子设备
CN211319247U (zh) 指纹识别装置、背光模组、液晶显示屏和电子设备
WO2021189478A1 (fr) Appareil de détection d'empreintes digitales et dispositif électronique
WO2020168496A1 (fr) Procédé et dispositif de reconnaissance d'empreinte digitale et dispositif de terminal
CN211319244U (zh) 指纹检测的装置和电子设备
CN210605739U (zh) 指纹检测装置和电子设备
WO2021007730A1 (fr) Appareil de détection d'empreintes digitales et dispositif électronique
US20210117644A1 (en) Optical sensing systems and devices including apertures supplanting photodiodes for increased light throughput
CN112860120B (zh) 指纹识别装置、电子设备和环境光检测的方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20911668

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20911668

Country of ref document: EP

Kind code of ref document: A1