WO2020087241A1 - Dispositif d'empreinte digitale optique sous écran et dispositif portatif ayant une fonction de détection anti-contrefaçon d'empreinte digitale tridimensionnelle - Google Patents

Dispositif d'empreinte digitale optique sous écran et dispositif portatif ayant une fonction de détection anti-contrefaçon d'empreinte digitale tridimensionnelle Download PDF

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Publication number
WO2020087241A1
WO2020087241A1 PCT/CN2018/112538 CN2018112538W WO2020087241A1 WO 2020087241 A1 WO2020087241 A1 WO 2020087241A1 CN 2018112538 W CN2018112538 W CN 2018112538W WO 2020087241 A1 WO2020087241 A1 WO 2020087241A1
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WO
WIPO (PCT)
Prior art keywords
optical
light
fingerprint
display panel
structured light
Prior art date
Application number
PCT/CN2018/112538
Other languages
English (en)
Chinese (zh)
Inventor
李宗德
王浩任
罗介暐
许志隆
张继宗
黄泳霖
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 CN201880002079.8A priority Critical patent/CN109564626B/zh
Priority to PCT/CN2018/112538 priority patent/WO2020087241A1/fr
Publication of WO2020087241A1 publication Critical patent/WO2020087241A1/fr

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    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components

Definitions

  • the invention relates to an under-screen optical fingerprint device with a fingerprint anti-counterfeiting sensing function, in particular to an under-screen optical fingerprint device with a three-dimensional fingerprint anti-counterfeiting sensing function and a handheld device.
  • fingerprint capture was mostly based on capacitive sensing fingerprints.
  • full-screen mobile phones have become a trend.
  • under-screen fingerprints are one of the current mainstream methods.
  • the capacitive circuit sensing design can be used to distinguish between real fingers and fake fingers.
  • the current full-screen mobile phones that use optical under-screen fingerprint sensing technology use optical reflection to capture fingerprint images for fingerprint characteristics. Identification, so it is impossible to distinguish real fingers and sample fake fingers through electrical characteristics.
  • the fake finger can be used to identify the full-screen mobile phone fingerprint of the legal user, thereby stealing the full-screen mobile phone.
  • the anti-counterfeiting mechanism on the optical fingerprint of the full-screen mobile phone that currently uses the optical under-screen fingerprint sensing technology needs further improvement and innovation.
  • One of the objects of the present invention is to disclose an under-screen optical fingerprint device with a three-dimensional fingerprint anti-counterfeit sensing function and a handheld device to solve the above problems.
  • An embodiment of the present application discloses an under-screen optical fingerprint device with a three-dimensional fingerprint anti-counterfeit sensing function for sensing fingerprints of a specific object.
  • the under-screen optical fingerprint device includes: a structured light output device For projecting structured light on the specific object; and an optical sensing device including a first optical input device for receiving the structured light reflected by the specific object to obtain the fingerprint of the specific object Three-dimensional information.
  • the handheld device includes: a display screen assembly; and a structured light output device, For projecting structured light on the specific object; and an optical sensing device including a first optical input device for receiving the structured light reflected by the specific object to obtain the third dimension of the fingerprint of the specific object information.
  • the under-screen optical fingerprint device and the handheld device disclosed in the present application can further obtain the third-dimensional information of the fingerprint through the optical sensing device, eliminating the possibility of using a fake finger with a correct two-dimensional fingerprint to operate a full-screen mobile phone, and this application can indeed compensate
  • the display screen adopting the optical under-screen fingerprint sensing technology does not have anti-counterfeiting defects for distinguishing true and false fingers.
  • FIG. 1A is a schematic view of the appearance of a handheld device of an under-screen optical fingerprint device with a three-dimensional fingerprint anti-counterfeiting sensing function of the present application.
  • FIG. 1B is a schematic structural diagram of a first embodiment of a display screen assembly and an under-screen optical fingerprint device of the handheld device of FIG. 1A.
  • FIG. 2 is a schematic structural view of another embodiment of a structured light output device in an under-screen optical fingerprint device with a three-dimensional fingerprint anti-counterfeiting sensing function of the present application.
  • FIG. 3 is a schematic structural diagram of a second embodiment of a display screen assembly and an under-screen optical fingerprint device of the handheld device of FIG. 1A.
  • FIG. 4 is a schematic structural view of a third embodiment of a display screen assembly and an under-screen optical fingerprint device of the handheld device of FIG. 1A.
  • FIG. 5 is a schematic structural diagram of a fourth embodiment of the display screen assembly and the under-screen optical fingerprint device of the handheld device of FIG. 1A.
  • the first optical input device the first optical input device
  • the second optical input device is the second optical input device
  • the display screen with three-dimensional fingerprint anti-counterfeiting sensing function disclosed in this application can obtain three-dimensional information of finger fingerprints, realize the difference between true and fake fingers, and effectively improve the anti-counterfeiting security of the fingerprint under the optical screen.
  • the first embodiment of the display assembly of the handheld device 100 and the under-screen optical fingerprint device 1 of the present application includes a display assembly 10 and an optical sensing device (including a first optical The input device 20 and a second optical input device 40) and a structured light output device 30.
  • the handheld device 100 may be any handheld electronic device such as a smart phone, a personal digital assistant, a handheld computer system, or a tablet computer.
  • the display screen assembly 10 includes at least a display panel 11 and a protective cover 12; wherein the display panel 11 has a first side 11a and a second side 11b opposite to the first side 11a, the protective cover
  • the board 12 is provided on the second side 11 b of the display panel 11.
  • the display panel 11 emits visible light L1 with different wavelengths by driving to display color images.
  • the display panel 11 may be an organic electroluminescence display panel (OLED), but it is not limited thereto.
  • the first optical input device 20 is disposed on the first side 11a of the display panel 11 of the display screen assembly 10, so that the display panel 11 is located between the optical sensing device 20 and the protective cover 12; When a specific object approaches the protective cover 12 of the display screen assembly 10, the specific object reflects part of the visible light L1 emitted by the display panel 11.
  • the first optical input device 20 is used to receive light L11 (including visible light and / or invisible light) reflected by the specific object, and obtain two-dimensional information of the specific object.
  • the two-dimensional information mentioned here is a two-dimensional fingerprint image; therefore, fingerprint characteristics can be identified based on the two-dimensional fingerprint image.
  • the above structured light output device 30 is disposed in the display screen assembly 10 and projects structured light L4 to the specific object.
  • the structured light L4 is a spectrum-coded invisible light.
  • the structured light output device 30 is disposed on the first side 11a of the display panel 11 and includes a light source 31, a collimating lens 32, and an optical diffraction component 33; wherein the light source 31 is used To emit invisible light L2, such as near-infrared light (wavelength range of 800-2500nm) or infrared laser; preferably, the wavelength of the invisible light is a single wavelength.
  • the collimating lens 32 When the light source 31 emits the invisible light L2 to the collimating lens 32, since the collimating lens 32 is disposed between the light source 31 and the optical diffraction component 33, the collimating lens 32 will shape the invisible light L2 into parallel light L3, It is emitted to the optical diffraction component 33, and then the optical diffraction component 33 encodes the spectrum of the parallel light L3 and projects structured light L4 to a specific object, that is, invisible light with a specific pattern.
  • the structured light of the structured light output device 30 will be projected outwards through the display panel 11 and the protective cover plate 12. Since the structured light L4 is spectrally encoded, after passing through the display screen assembly 10 and being disturbed, its The pattern can still be maintained at a high signal-to-noise ratio (SNR).
  • SNR signal-to-noise ratio
  • another embodiment of the light output device 30 ′ with the above structure includes a light source 31, a collimating lens 32 and a light mask 34; wherein the light mask 34 is disposed above the light source 31 And a light-shielding pattern layer 341 is formed on the photomask 34.
  • the light source 31 emits invisible light L2 to the collimating lens 32
  • the collimating lens 32 since the collimating lens 32 is disposed between the light source 31 and the light setting 34, the collimating lens 32 will shape the invisible light L2 into parallel light L3 and emit to After passing through the photomask 34, the photomask 34 emits structured light L4 ′ having a pattern matching the pattern of the light-shielding pattern layer 34.
  • the collimator lens 32 and the optical diffractive component 33 of the structured light output device 30 and the collimator lens 32 and the reticle 34 of the second embodiment respectively constitute a A pattern optical component, that is, the pattern optical component is disposed between the light source and the specific object.
  • the second optical input device 40 is disposed on the first side 11 a of the display panel 11.
  • the structured light L41 is also reflected, and the second optical The input device 40 receives and performs depth calculation of the specific object to obtain third-dimensional information of the specific object; the third-dimensional information mentioned here is the third-dimensional information of the fingerprint, taking a real human finger as an example,
  • the infrared laser can penetrate into the dermis layer and reflect the texture of the dermis layer.
  • the texture of the dermis layer matches the texture of the fingerprint on the epidermal layer of the real finger; therefore, the fingerprint obtained according to the second optical input device 40
  • the third dimension of the information can calculate the depth from the fingerprint on the epidermal layer of the finger to the dermis layer, and determine that this depth may be the probability of the finger, and then serve as the basis for distinguishing the fake finger, because the fingerprint layer of the fake finger usually does not have enough depth.
  • the first optical input device 20 may be further combined to obtain the two-dimensional information of the fingerprint to obtain the three-dimensional information of the fingerprint for comprehensive judgment.
  • the second embodiment of the display screen assembly and the under-screen optical fingerprint device of the present application is substantially the same as the first embodiment.
  • the display screen assembly and the under-screen optical fingerprint device 1A also include the display screen assembly 10 1.
  • An optical sensing device including the first optical input device 20 and the structured light output device 30
  • the structured light output device 30 In this embodiment, the first optical input device 20 and the second optical input device 40 can be further integrated into a single optical sensing device, but the arrangement of FIG. 3 is not limited.
  • the third embodiment of the display screen assembly and the under-screen optical fingerprint device of the present application is substantially the same as the first embodiment.
  • the display screen assembly and the under-screen optical fingerprint device 1B also include the display screen assembly 10 1.
  • An optical sensing device including the first optical input device 20 and the structured light output device 30
  • the structured light output device 30 is disposed between the protective cover 12 and the display panel 11.
  • the fourth embodiment of the display screen assembly and the under-screen optical fingerprint device of this application is substantially the same as the second embodiment.
  • the display screen assembly and the under-screen optical fingerprint device 1C also include the display screen assembly 10 1.
  • An optical sensing device including the first optical input device 20 and the structured light output device 30
  • the structured light output device 30 is disposed between the protective cover 12 and the display panel 11.
  • the second optical input device of a display screen with a three-dimensional fingerprint anti-counterfeit sensing function disclosed in the present application can further obtain the third-dimensional information of the fingerprint, and the third-dimensional information can be used to distinguish between real and fake fingers.
  • the two-dimensional information of the fingerprint is obtained through the first optical input device, and the three-dimensional information composed of the third third information is used to distinguish between true and false fingers, which effectively improves the display of optical and off-screen fingerprint sensing technology for real and fake fingers. Resolution.

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

Abstract

La présente invention concerne un dispositif d'empreinte digitale optique sous écran (1) ayant une fonction de détection anti-contrefaçon d'empreinte digitale tridimensionnelle, utilisée pour détecter une empreinte digitale d'un objet spécifique, ledit dispositif d'empreinte digitale optique sous écran (1) comprenant : un dispositif de délivrance de lumière structurée (30), utilisé pour projeter une lumière structurée (L4) sur l'objet spécifique ; et un dispositif de détection optique, comprenant un second dispositif d'entrée optique (40), utilisé pour recevoir la lumière structurée réfléchie par l'objet spécifique (L41) afin d'obtenir des informations tridimensionnelles de l'empreinte digitale de l'objet spécifique.
PCT/CN2018/112538 2018-10-30 2018-10-30 Dispositif d'empreinte digitale optique sous écran et dispositif portatif ayant une fonction de détection anti-contrefaçon d'empreinte digitale tridimensionnelle WO2020087241A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880002079.8A CN109564626B (zh) 2018-10-30 2018-10-30 具三维指纹防伪感测功能的屏下光学指纹装置及手持装置
PCT/CN2018/112538 WO2020087241A1 (fr) 2018-10-30 2018-10-30 Dispositif d'empreinte digitale optique sous écran et dispositif portatif ayant une fonction de détection anti-contrefaçon d'empreinte digitale tridimensionnelle

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PCT/CN2018/112538 WO2020087241A1 (fr) 2018-10-30 2018-10-30 Dispositif d'empreinte digitale optique sous écran et dispositif portatif ayant une fonction de détection anti-contrefaçon d'empreinte digitale tridimensionnelle

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