WO2020259270A1 - 光学指纹传感器及具有其的电子设备 - Google Patents

光学指纹传感器及具有其的电子设备 Download PDF

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Publication number
WO2020259270A1
WO2020259270A1 PCT/CN2020/095023 CN2020095023W WO2020259270A1 WO 2020259270 A1 WO2020259270 A1 WO 2020259270A1 CN 2020095023 W CN2020095023 W CN 2020095023W WO 2020259270 A1 WO2020259270 A1 WO 2020259270A1
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WO
WIPO (PCT)
Prior art keywords
layer
fingerprint sensor
invisible light
light
optical
Prior art date
Application number
PCT/CN2020/095023
Other languages
English (en)
French (fr)
Inventor
吴雨桐
Original Assignee
Oppo广东移动通信有限公司
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 Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP20832302.2A priority Critical patent/EP3965006A4/en
Publication of WO2020259270A1 publication Critical patent/WO2020259270A1/zh
Priority to US17/540,163 priority patent/US11783562B2/en

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    • 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
    • G06V10/143—Sensing or illuminating at different wavelengths
    • 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
    • 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
    • G06V40/40—Spoof detection, e.g. liveness detection

Definitions

  • This application relates to the technical field of electronic equipment, and in particular to an optical fingerprint sensor and electronic equipment with the same.
  • an under-screen optical fingerprint terminal is composed of a terminal screen and an under-screen fingerprint sensor.
  • the terminal screen is composed of a glass cover and a display panel
  • the under-screen fingerprint sensor is composed of an array of several photosensitive elements.
  • the light emitted by the display panel reaches the surface of the finger through the glass cover. Because of the different reflectivity of the light at the fingerprint valley ridge, the intensity of the reflected light at the fingerprint valley ridge is also different.
  • the photosensitive element of the fingerprint sensor under the screen is reflected by the surface of the finger. Different intensities of light form fingerprint images. In this way, the under-screen optical fingerprint recognition function can be realized.
  • This application proposes an optical fingerprint sensor, which can effectively identify fake fingerprints.
  • This application also proposes an electronic device including the above-mentioned optical fingerprint sensor.
  • the optical fingerprint sensor includes: a light-sensitive element including a light-sensitive base layer and a first light-sensitive layer for receiving visible light, and one side surface of the light-sensitive base layer is provided with a There are a plurality of grooves, the first photosensitive layer is multiple, the plurality of the first photosensitive layers correspond to the plurality of the grooves one-to-one, and the first photosensitive layer is provided in the corresponding groove Inside, a second photosensitive layer for receiving invisible light is provided between the inner wall surface of at least part of the groove and the outer wall surface of the first photosensitive layer among the plurality of grooves.
  • the sensing layer covers the surface of the first photosensitive layer opposite to the inner wall surface of the groove; an optical filter layer, the optical filter layer and the photosensitive element are laminated and arranged on the photosensitive element The side where the groove is provided; an optical lens for condensing light, the optical lens and the optical filter layer are laminated and located on the side of the optical filter layer away from the photosensitive element.
  • the first photosensitive layer for receiving visible light is arranged in the plurality of grooves of the photosensitive element, and the inner wall surface of at least part of the grooves and the first A second light-sensitive layer for receiving invisible light is arranged between the outer walls of the light-sensitive layer, so that the optical fingerprint sensor can receive visible light signals and invisible light signals at the same time, so that fingerprint images can be formed by receiving visible light reflected by fingers.
  • the imaging of the invisible light reflected by the finger such as the invisible light near the red wavelength band, is received to effectively distinguish the authenticity of the fingerprint to be measured, and the fake fingerprint can be effectively identified, which improves the security of the electronic device using the optical fingerprint sensor.
  • the electronic device includes: a housing; a display screen, the display screen is provided on the housing, the display screen and the housing define an installation space; a cover plate, the cover plate Is arranged on the housing, the cover plate is laminated with the display screen and is located on the side of the display screen away from the installation space; in the above-mentioned optical fingerprint sensor, the optical fingerprint sensor is arranged on the In the installation space, the light-sensitive base layer and the display screen are stacked; an invisible light emitting layer that emits invisible light toward the cover plate, and the invisible light emitting layer is arranged between the optical fingerprint sensor and the cover plate The cover plate and the optical fingerprint sensor are stacked in between, and the invisible light emitting layer is opposite to the optical fingerprint sensor.
  • the first photosensitive layer for receiving visible light is arranged in the plurality of grooves of the photosensitive element, and the inner wall surface of at least part of the grooves and the first light
  • the second photosensitive layer for receiving invisible light is arranged between the outer walls of the sensing layer, so that the optical fingerprint sensor can receive visible light signals and invisible light signals at the same time, so that fingerprint images can be formed by receiving visible light reflected by the finger.
  • the imaging of the invisible light reflected by the finger such as the invisible light near the red wavelength band, can effectively distinguish the authenticity of the fingerprint to be tested, and can effectively identify the fake fingerprint, which improves the security of the electronic device using the optical fingerprint sensor.
  • Figure 1 is a cross-sectional view of an optical fingerprint sensor according to an embodiment of the present application.
  • Figure 2 is a top view of an optical fingerprint sensor according to an embodiment of the present application.
  • Figure 3 is a cross-sectional view of an optical fingerprint sensor according to another embodiment of the present application.
  • Fig. 4 is a top view of an optical fingerprint sensor according to another embodiment of the present application.
  • Fig. 5 is a top view of an optical fingerprint sensor according to another embodiment of the present application.
  • Fig. 6 is a perspective view of an electronic device according to an embodiment of the present application.
  • Fig. 7 is a perspective view of a display screen and an optical fingerprint sensor of an electronic device according to an embodiment of the present application
  • FIG. 8 is a cross-sectional view of a partial structure of an electronic device according to an embodiment of the present application.
  • FIG. 9 is a cross-sectional view of a partial structure of an electronic device according to another embodiment of the present application.
  • FIG. 10 is a cross-sectional view of a partial structure of an electronic device according to another embodiment of the present application.
  • Fig. 11 is a top view of an invisible light emitting layer of an electronic device according to an embodiment of the present application.
  • Fig. 12 is a top view of an invisible light emitting layer of an electronic device according to another embodiment of the present application.
  • Fig. 13 is a top view of an invisible light emitting layer of an electronic device according to another embodiment of the present application.
  • Fig. 14 is a top view of an invisible light emitting layer of an electronic device according to another embodiment of the present application.
  • Photosensitive element 1 photosensitive base layer 11, groove 111, first photosensitive layer 12, second photosensitive layer 13,
  • Optical filter layer 2 sub-optical lens 3
  • Invisible light emitting layer 50 substrate 501, invisible light emitting unit 502,
  • optical fingerprint sensor 10 according to an embodiment of the present application is described below with reference to the drawings.
  • the optical fingerprint sensor 10 includes a light sensing element 1, an optical filter layer 2 and an optical lens for condensing light.
  • the photosensitive element 1 includes a photosensitive base layer 11 and a first photosensitive layer 12 for receiving visible light.
  • One side surface of the photosensitive base layer 11 is provided with a plurality of grooves 111, and the first photosensitive layer 12 is There are a plurality of first photosensitive layers 12 corresponding to the plurality of grooves 111 one by one, and the first photosensitive layers 12 are disposed in the corresponding grooves 111.
  • the first photosensitive layer 12 can receive visible light, and can convert the visible light signal into an electrical signal that the electronic device 100 can recognize, thereby forming a fingerprint image.
  • a second photosensitive layer 13 for receiving invisible light is provided between the inner wall surface of at least part of the groove 111 and the outer wall surface of the first photosensitive layer 12 in the plurality of grooves 111. It can be understood that a second photosensitive layer 13 for receiving invisible light is provided between the inner wall surface of part of the groove 111 and the outer wall surface of the first photosensitive layer 12 among the plurality of grooves 111, or each groove A second light-sensitive layer 13 for receiving invisible light is provided between the inner wall surface of 111 and the outer wall surface of the first light-sensitive layer 12.
  • the second photosensitive layer 13 can receive invisible light, and can convert the invisible light signal into an electrical signal that can be recognized by the electronic device 100, thereby forming a fingerprint image.
  • the second photosensitive layer 13 covers the surface of the first photosensitive layer 12 opposite to the inner wall surface of the groove 111. This facilitates the second photosensitive layer 13 to receive invisible light and facilitates the electrical connection of the second photosensitive layer 13.
  • the first photosensitive layer 12 for receiving visible light and the second photosensitive layer 13 for receiving invisible light are integrated into a groove 111, which realizes the simultaneous reception of invisible light signals without reducing the resolution of visible light receiving.
  • the first photosensitive layer 12 and the second photosensitive layer 13 may be photodiodes.
  • the first photosensitive layer 12 can receive visible light
  • the second photosensitive layer 13 can receive invisible light, so that the photosensitive element 1 can receive both visible light signals and invisible light signals for fingerprint imaging.
  • the optical fingerprint sensor 10 When the optical fingerprint sensor 10 is used in the electronic device 100 for fingerprint recognition, it can emit visible light and invisible light to the recognition object (fake finger or real finger). Due to the different spectral reflection characteristics of the fake finger and the real finger, the real finger (living finger) ) It has special reflection and absorption characteristics for invisible light, especially the invisible light near the red wavelength band, so that the invisible light reflected by the surface of the real finger and the fake finger, for example, the invisible light component near the red wavelength band is also different.
  • the subsequent invisible light such as the invisible light component near the red light band
  • the component reflected by the fake finger is greater than the component reflected by the fake finger, as shown in Figure 8-10, where the hollow arrow is visible light and the solid arrow is invisible light.
  • the real finger due to the spectral characteristics of the real finger (living finger), the real finger itself can also emit invisible light near the red wavelength band, so that the intensity of the invisible light reflected by the real finger to reach the optical fingerprint sensor 10 is greater than that of the optical fingerprint reflected by the fake finger.
  • the invisible light intensity of the sensor 10 even if the fingerprint image formed by the light that reaches the optical fingerprint sensor 10 after being reflected by a real finger and a fake finger is the same, the optical fingerprint sensor 10 can also distinguish effectively by judging the image formed by this part of the invisible light Real fingers and fake fingers (non-living fingers) improve the security of the electronic device 100 using the optical fingerprint sensor 10 and improve the device's ability to resist attacks from fake fingers.
  • the image formed by the invisible light reflected by the real finger and reaching the optical fingerprint sensor 10 is different from the image formed by the invisible light reflected by the fake finger and reaching the optical fingerprint sensor 10, and the image shape is different.
  • the optical filter layer 2 is laminated with the photosensitive element 1 and is located on the side of the photosensitive element 1 where the groove 111 is provided.
  • the optical filter layer 2 is used to filter the light reflected by the finger to remove the required visible and invisible light components. Filter out accurately to remove other components of light.
  • the optical lens and the optical filter layer 2 are laminated and located on the side of the optical filter layer 2 away from the light sensor 1. The optical lens plays a role of condensing light, condensing visible light and invisible light on the first photosensitive layer 12 and the second photosensitive layer 13 of the photosensitive element 1.
  • the first photosensitive layer 12 for receiving visible light is provided in the plurality of grooves 111 of the photosensitive element 1, and at least part of the grooves 111 of the plurality of grooves 111
  • the second light-sensitive layer 13 for receiving invisible light is provided between the inner wall surface of the first light-sensitive layer 12 and the outer wall surface of the first light-sensitive layer 12, so that the optical fingerprint sensor 10 can receive both visible light signals and invisible light signals at the same time.
  • the reflected visible light is used to form a fingerprint image.
  • the authenticity of the fingerprint to be tested can be effectively distinguished, and the fake fingerprint can be effectively identified, which improves the application of the optical fingerprint.
  • a plurality of grooves 111 are arranged in rows and columns.
  • the structure of the photosensitive element 1 can be simplified, thereby simplifying the structure of the optical fingerprint sensor 10.
  • the arrangement of the plurality of first photosensitive layers 12 can be made more regular, and the imaging effect can be better.
  • the present application is not limited to this, and the plurality of grooves 111 may not be arranged in rows or columns, that is, the plurality of grooves 111 may be randomly arranged.
  • each groove 111 is provided with a second light-sensitive layer 13, which can increase the imaging clarity of receiving invisible light reflected by the finger, for example, invisible light near the red wavelength band. Improve the accuracy of true and false discrimination.
  • the invisible light used to determine the authenticity of fingerprints does not require high imaging resolution.
  • multiple in the same row The groove 111 with the second photosensitive layer 13 and the groove 111 without the second photosensitive layer 13 in the groove 111 may be arranged alternately.
  • the groove 111 area provided with the first photosensitive layer 12 and the second photosensitive layer 13 at the same time can receive visible light signals and invisible light signals at the same time, thereby reducing the cost of the photosensitive element 1, thereby reducing the cost of the optical fingerprint sensor 10 .
  • the grooves 111 with the second photosensitive layer 13 and the grooves 111 without the second photosensitive layer 13 are arranged alternately. Therefore, the cost of the light sensor 1 can be further reduced, thereby reducing the cost of the optical fingerprint sensor 10. Furthermore, as shown in FIG. 5, the plurality of first photosensitive layers 12 in two adjacent rows are staggered. As a result, the distribution of the second light-sensitive layer 13 can be made more uniform, and the imaging clarity of receiving invisible light reflected by the finger, such as invisible light near the red wavelength band, can be increased, and the accuracy of authenticity discrimination can be improved.
  • the first photosensitive layer 12 and the second photosensitive layer 13 are flush with the surface of the photosensitive base layer 11 facing the optical filter layer 2. In this way, the effect of receiving light by the first light-sensitive layer 12 and the second light-sensitive layer 13 can be ensured, and the light-sensitive element 1 and the optical filter can be laminated and arranged conveniently.
  • the optical lens includes a plurality of sub-optical lenses 3, and the plurality of sub-optical lenses 3 correspond to the plurality of grooves 111 one-to-one, and the sub-optical lenses 3 are aligned with the corresponding grooves 111. Correct. As a result, visible light and invisible light can be better concentrated on the first photosensitive layer 12 and the second photosensitive layer 13 of the photosensitive element 1.
  • the projection of the groove 111 on the optical filter layer 2 is located within the projection of the corresponding sub-optical lens 3 on the photosensitive base layer 11. That is, the sub-optical lens 3 can completely cover the groove 111 in the direction perpendicular to the optical filter layer 2. In this way, the light-concentrating effect of the sub-optical lens 3 on the first light-sensitive layer 12 and the second light-sensitive layer 13 can be better guaranteed, and the effect of the first light-sensitive layer 12 and the second light-sensitive layer 13 in receiving light signals can be ensured.
  • the multiple sub-optical lenses 3 are integrally molded parts. Therefore, the structure of the optical lens can be simplified, and the assembly efficiency can be improved, thereby improving the upper production efficiency.
  • the electronic device 100 according to an embodiment of the present application is described below with reference to the accompanying drawings.
  • the electronic device 100 includes a housing 20, a display screen 30, a cover plate 40, an optical fingerprint sensor 10, and an invisible light emitting layer 50.
  • the display screen 30 provides the display function of the electronic device 100
  • the display screen 30 is arranged on the housing 20
  • the display screen 30 and the housing 20 define an installation space
  • the cover 40 is arranged on the housing 20, and the cover 40 It is stacked with the display screen 30 and is located on the side of the display screen 30 away from the installation space.
  • the cover plate 40 can be a glass cover plate, and the cover plate 40 can protect the display screen 30.
  • the optical fingerprint sensor 10 is arranged in the installation space, the photosensitive base layer 11 and the display screen 30 are laminated, and the first photosensitive layer 12 and the second photosensitive layer 13 are arranged on the side of the photosensitive base layer 11 facing the display screen 30.
  • the invisible light emitting layer 50 can emit invisible light toward the cover plate 40.
  • the invisible light emitting layer 50 is arranged between the optical fingerprint sensor 10 and the cover plate 40 and stacked with the cover plate 40 and the optical fingerprint sensor 10, and the invisible light emitting layer 50 is in contact with The optical fingerprint sensor 10 is opposite.
  • the display screen 30 can emit upward visible light, and the invisible light emitting layer 50 can emit upward invisible light.
  • the visible light and invisible light are reflected on the surface of the fake finger and the real finger.
  • the imaging of reflected invisible light, such as invisible light near the red wavelength band, can effectively distinguish the authenticity of the fingerprint to be measured, and can effectively identify the fake fingerprint, which improves the security of the electronic device 100 using the optical fingerprint sensor 10.
  • the real finger when the electronic device 100 performs fingerprint recognition, the real finger can be placed on the cover 40 opposite to the optical fingerprint sensor 10, and the display screen 30 can emit visible light toward the cover 40 (as shown in Figure 8- The hollow arrow shown in Fig. 10), visible light passes through the cover 40 to reach the surface of the real finger. Because the reflectivity of light at the fingerprint valley ridge is different, the intensity of the reflected light at the fingerprint valley ridge is also different.
  • Optical fingerprint sensor 10 The light of different intensities reflected on the surface of the finger forms a fingerprint image to realize the fingerprint recognition function. As shown in FIGS. 8-10, when the refractive index of the fake finger is the same as that of the real finger and the valley ridge distribution is the same, the fingerprint image formed by the optical fingerprint sensor 10 through the light reflected from the finger surface is the same, and the authenticity cannot be distinguished.
  • the invisible light reflective layer 50 can emit invisible light (solid arrows as shown in Figures 8-10), such as red light, toward the cover 40, and the invisible light passes through the cover to reach the surface of the real finger. Since the real finger has special reflection and absorption characteristics for invisible light, and the real finger itself can also emit invisible light near the red light band, the invisible component reflected by the real finger is larger and the intensity is greater. The reflection reaches the optical fingerprint sensor 10 to form a fingerprint image. As shown in Figures 8-10, the invisible intensity and components after reflection from the fake finger are small, and the fingerprint image formed by the reflection of the fake finger to the optical fingerprint sensor 10 is poor in definition, and the shape of the fingerprint image is similar to the actual fingerprint. The shape of the image is different, so that the authenticity of the fingerprint can be identified.
  • invisible light solid arrows as shown in Figures 8-10
  • the first photosensitive layer 12 for receiving visible light is arranged in the plurality of grooves 111 of the photosensitive element 1, and at least a part of the groove 111 of the plurality of grooves 111
  • a second light-sensitive layer 13 for receiving invisible light is provided between the inner wall surface and the outer wall surface of the first light-sensitive layer 12, so that the optical fingerprint sensor 10 can receive both visible light signals and invisible light signals at the same time, so that it can be reflected by receiving fingers.
  • the fingerprint image is formed by the visible light of the finger.
  • the authenticity of the fingerprint to be tested can be effectively distinguished, and the fake fingerprint can be effectively identified, which improves the application of the optical fingerprint sensor 10 of the security of the electronic device 100.
  • the invisible light emitting layer 50 is attached to the surface of the display screen 30 facing the installation space. During the assembling process of the electronic device 100, the invisible light emitting layer 50 and the display screen 30 can be assembled into one component for assembly, which can improve the assembly efficiency.
  • the invisible light emitting layer 50 is provided between the cover plate 40 and the display screen 30.
  • the invisible light emitting layer 50 can be assembled with the cover plate 40 into a component for assembly; of course, as shown in FIG. 10, the invisible light emitting layer 50 can be combined with the display
  • the screen 30 is assembled into one component for assembly, which can improve assembly efficiency.
  • the area of the invisible light emitting layer 50 is smaller than the area of the display screen 30. Therefore, the material cost of the invisible light emitting layer 50 can be saved.
  • the invisible light emitting layer 50 may be provided in an area opposite to the optical fingerprint sensor 10. Further, the projection of the invisible light emitting layer 50 on the display screen 30 may be the same as that of the optical fingerprint sensor 10 on the display screen. The projections on 30 coincide. As a result, the invisible light emitting layer 50 can ensure the supplementary light effect of the invisible light of the optical fingerprint sensor 10, and the material cost of the invisible light emitting layer 50 can be reduced.
  • the invisible light emitting layer 50 includes a substrate 501 and an invisible light emitting unit 502.
  • the substrate 501 is a transparent member, thereby facilitating the visible light and invisible light reflected by the finger to pass through the substrate 501 and be captured by the optical fingerprint sensor 10. receive.
  • the invisible light emitting unit 502 can emit invisible light, and there are multiple invisible light emitting units 502, and the plurality of invisible light emitting units 502 are arranged on the surface of the substrate 501 facing the cover 40 at intervals. Therefore, the invisible light emitted by the invisible light emitting layer 50 can be made more uniform, and the imaging effect of the optical fingerprint sensor 10 after receiving the invisible light reflected by the finger is improved.
  • a plurality of invisible light emitting units 502 are arranged in rows and columns. Therefore, the distribution of the invisible light emitting units 502 can be made more regular, so that the invisible light emitted by the invisible light emitting layer 50 is more uniform, and the imaging effect of the optical fingerprint sensor 10 after receiving the invisible light reflected by the finger is improved.
  • the present application is not limited to this.
  • multiple invisible light emitting units 502 may also be randomly distributed.
  • the cross section of the invisible light emitting unit 502 parallel to the cover plate 40 is circular, elliptical or polygonal.
  • the cross section of the invisible light emitting unit 502 parallel to the cover plate 40 is circular.
  • the cross section of the invisible light emitting unit 502 parallel to the cover plate 40 is a square.
  • the cross section of the invisible light emitting unit 502 parallel to the cover plate 40 is a rhombus.
  • the display screen 30 includes a plurality of spaced apart pixel units, and the invisible light unit is located in a gap defined by the plurality of pixel units. Therefore, it can be ensured that the invisible light emitted by the invisible light emitting unit 502 can be emitted upward through the gap between two adjacent pixels.
  • the wavelength range in which the second photosensitive layer 13 can receive invisible light is less than 1000 mm.
  • the invisible light emitting unit 502 may be an infrared light emitting tube.
  • the invisible light may be infrared light or near-infrared light.
  • the biological characteristics of the fingerprint can be effectively identified according to the invisible light wave energy received by the optical fingerprint sensor 10, and the ability of the electronic device 100 to resist two-dimensional and three-dimensional fake fingerprint attacks is improved.
  • the under-screen optical fingerprint sensor 10 adopts a structure in which the first photosensitive layer 12 and the second photosensitive layer 13 are stacked, and the photosensitive area of the photosensitive element 1 can receive visible light and invisible light at the same time.
  • the first photosensitive layer 12 in the photosensitive area of the photosensitive element 1 is used to receive the visible light signal reflected back by the fingerprint
  • the second photosensitive layer 13 is used to receive the invisible light signal emitted by the finger, so as to realize the two in the same photosensitive element 1.
  • Kind of optical signal collection is used to realize the two in the same photosensitive element 1.
  • the electronic device 100 uses an invisible light emitting layer 50 to supplement light to enhance the intensity of the invisible light received by the photosensitive element 1.
  • the under-screen optical fingerprint sensor 10 can effectively identify fake fingerprints, and improve the anti-counterfeiting ability of the optical fingerprint sensor 10.
  • the electronic device 100 may be any of various types of computer system devices that are mobile or portable and perform wireless communication (only one form is exemplarily shown in FIG. 6).
  • the electronic device 100 may be a mobile phone or a smart phone (for example, a phone based on iPhoneTM and AndroidTM), a portable game device (for example, Nintendo DSTM, PlayStation PortableTM, Gameboy AdvanceTM, iPhoneTM), a laptop Type computers, PDAs, portable Internet devices, music players, and data storage devices, other handheld devices, such as watches, earphones, pendants, headsets, etc.
  • the electronic device 100 can also be other wearable devices (for example, Head-mounted devices (HMD) such as electronic glasses, electronic clothes, electronic bracelets, electronic necklaces, electronic tattoos, electronic device 100 or smart watches).
  • HMD Head-mounted devices
  • the electronic device 100 may also be any one of multiple electronic devices 100, including but not limited to cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music Recorders, video recorders, cameras, other media recorders, radios, medical equipment, vehicle transportation equipment, calculators, programmable remote controls, pagers, laptop computers, desktop computers, printers, netbook computers, personal digital assistants (PDA) , Portable Multimedia Player (PMP), Moving Picture Experts Group (MPEG-1 or MPEG-2) Audio Layer (MP3) Player, Portable Medical Equipment, Digital Camera and their combinations.
  • PDA personal digital assistants
  • PMP Portable Multimedia Player
  • MPEG-1 or MPEG-2 Moving Picture Experts Group
  • MP3 Audio Layer
  • the electronic device 100 can perform multiple functions (for example, playing music, displaying videos, storing pictures, and receiving and sending phone calls).
  • the electronic device 100 may be a portable device such as a cellular phone, a media player, other handheld devices, wrist watch devices, pendant devices, earpiece devices, or other compact portable devices.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.

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  • 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

一种光学指纹传感器(10)及具有其的电子设备(100)，光学指纹传感器(10)包括：光感元件(1)，光感元件(1)包括光感基层(11)和用于接收可见光的第一光感层(12)，光感基层(11)上设有多个凹槽(111)，第一光感层(12)为多个且与多个凹槽(111)一一对应，第一光感层(12)设在相应的凹槽(111)内，多个凹槽(111)中的至少部分凹槽(111)的内壁面与第一光感层(12)之间设有用于接收不可见光的第二光感层(13)，第二光感层(13)包覆第一光感层(12)的与凹槽(111)的内壁面相对的表面；光学滤光层(2)；光学透镜(3)。

Description

光学指纹传感器及具有其的电子设备
相关申请的交叉引用
本申请基于申请号为201910550616.9，申请日为2019年6月24日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及电子设备技术领域，尤其是涉及一种光学指纹传感器及具有其的电子设备。
背景技术
相关技术中，屏下光学指纹终端由终端屏幕和屏下指纹传感器组成。其中，终端屏幕由玻璃盖板和显示面板组成，屏下指纹传感器由数个感光元件组成的阵列构成。显示面板发出的光通过玻璃盖板到达手指表面，由于光在指纹谷脊处的反射率不同，从而指纹谷脊处的反射光强弱也不同，屏下指纹传感器的感光元件接收经由手指表面反射的不同强弱的光形成指纹图像。通过这种方式，可以实现屏下光学指纹识别功能。
发明内容
本申请提出一种光学指纹传感器，所述光学指纹传感器可以有效地识别出假指纹。
本申请还提出一种电子设备，所述电子设备包括上述光学指纹传感器。
根据本申请实施例的光学指纹传感器，包括：光感元件，所述光感元件包括光感基层和用于接收可见光的第一光感层，所述光感基层的一侧表面上设有多个凹槽，所述第一光感层为多个，多个所述第一光感层与多个所述凹槽一一对应，所述第一光感层设在相应的所述凹槽内，多个所述凹槽中的至少部分所述凹槽的内壁面与所述第一光感层的外壁面之间设有用于接收不可见光的第二光感层，所述第二光感层包覆所述第一光感层的与所述凹槽的内壁面相对的表面；光学滤光层，所述光学滤光层与所述光感元件层叠设置且位于所述光感元件设有所述凹槽的一侧；用于聚光的光学透镜，所述光学透镜与所述光学滤光层层叠设置且位于所述光学滤光层的远离所述光感元件的一侧。
根据本申请实施例的光学指纹传感器，通过在光感元件的多个凹槽内设置用于接收可见光的第一光感层，且在多个凹槽的至少部分凹槽的内壁面与第一光感层的外壁面之间设置用于接收不可见光的第二光感层，可以使得光学指纹传感器可以同时接收可见光 信号和不可见光信号，从而可以通过接收手指反射的可见光来形成指纹图像，通过接收经手指反射的不可见光例如红光波段附近的不可见光的成像来有效辨别待测指纹的真假，可以有效地识别出假指纹，提高了应用该光学指纹传感器的电子设备的安全性。
根据本申请实施例的电子设备，包括：壳体；显示屏，所述显示屏设在所述壳体上，所述显示屏与所述壳体限定出安装空间；盖板，所述盖板设在所述壳体上，所述盖板与所述显示屏层叠设置且位于所述显示屏的远离所述安装空间的一侧；上述的光学指纹传感器，所述光学指纹传感器设在所述安装空间内，所述光感基层与所述显示屏层叠设置；朝向所述盖板发射不可见光的不可见光发射层，所述不可见光发射层设在所述光学指纹传感器与所述盖板之间且与所述盖板和所述光学指纹传感器层叠设置，所述不可见光发射层与所述光学指纹传感器相对。
根据本申请实施例的电子设备，通过在光感元件的多个凹槽内设置用于接收可见光的第一光感层，且在多个凹槽的至少部分凹槽的内壁面与第一光感层的外壁面之间设置用于接收不可见光的第二光感层，可以使得光学指纹传感器可以同时接收可见光信号和不可见光信号，从而可以通过接收手指反射的可见光来形成指纹图像，通过接收经手指反射的不可见光例如红光波段附近的不可见光的成像来有效辨别待测指纹的真假，可以有效地识别出假指纹，提高了应用该光学指纹传感器的电子设备的安全性。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本申请实施例的光学指纹传感器的截面图；
图2是根据本申请实施例的光学指纹传感器的俯视图；
图3是根据本申请另一个实施例的光学指纹传感器的截面图；
图4是根据本申请另一个实施例的光学指纹传感器的俯视图；
图5是根据本申请又一个实施例的光学指纹传感器的俯视图；
图6是根据本申请实施例的电子设备的立体图；
图7是根据本申请实施例的电子设备的显示屏和光学指纹传感器的立体图；
图8是根据本申请实施例的电子设备的部分结构的截面图；
图9是根据本申请另一个实施例的电子设备的部分结构的截面图；
图10是根据本申请又一个实施例的电子设备的部分结构的截面图；
图11是根据本申请实施例的电子设备的不可见光发射层的俯视图；
图12是根据本申请另一个实施例的电子设备的不可见光发射层的俯视图；
图13是根据本申请又一个实施例的电子设备的不可见光发射层的俯视图；
图14是根据本申请再一个实施例的电子设备的不可见光发射层的俯视图。
附图标记：
电子设备100，
光学指纹传感器10，
光感元件1，光感基层11，凹槽111，第一光感层12，第二光感层13，
光学滤光层2，子光学透镜3，
壳体20，
显示屏30，
盖板40，
不可见光发射层50，基板501，不可见光发射单元502，
真手指A，假手指B。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
下面参考附图描述根据本申请实施例的光学指纹传感器10。
如图1所示，根据本申请实施例的光学指纹传感器10，包括光感元件1、光学滤光层2和用于聚光的光学透镜。
具体而言，光感元件1包括光感基层11和用于接收可见光的第一光感层12，光感基层11的一侧表面上设有多个凹槽111，第一光感层12为多个，多个第一光感层12与多个凹槽111一一对应，第一光感层12设在相应的凹槽111内。第一光感层12可以接收可见光，可以将可见光信号转化成电子设备100可以识别的电信号，从而形成指纹图像。多个凹槽111中的至少部分凹槽111的内壁面与第一光感层12的外壁面之间设有用于接收不可见光的第二光感层13。可以理解的是，多个凹槽111中的部分凹槽111的内壁面与第一光感层12的外壁面之间设有用于接收不可见光的第二光感层13，或者每个凹槽111的内壁面与第一光感层12的外壁面之间均设有用于接收不可见光的第二 光感层13。第二光感层13可以接收不可见光，可以将不可见光信号转化成电子设备100可以识别的电信号，从而形成指纹图像。
其中，第二光感层13包覆第一光感层12的与凹槽111的内壁面相对的表面。由此便于第二光感层13接收不可见光且便于第二光感层13电连接。同时，将接收可见光的第一光感层12和接收不可见光的第二光感层13集成到一个凹槽111中，实现了在不降低可见光接收分辨率的条件下同时接收不可见光信号，提高光学指纹传感器10的分辨率。
在本申请的一个示例中，第一光感层12和第二光感层13可以为光电二极管。
第一光感层12可以接收可见光，第二光感层13可以接收不可见光，从而使得光感元件1可以同时接收可见光信号和不可见光信号进行指纹成像。当光学指纹传感器10用于电子设备100等进行指纹识别时，可以向识别对象(假手指或真手指)发射可见光和不可见光，由于假手指和真手指的光谱反射特性不同，真手指(活体手指)对于不可见光尤其是红光波段附近的不可见光具有特殊的反射和吸收特性，从而经过真手指和假手指表面反射后的不可见光例如红光波段附近的不可见光分量也不同，经过真手指反射后的不可见光例如红光波段附近的不可见光分量要大于经过假手指反射后的分量，如图8-图10所示，其中空心箭头为可见光，实心箭头为不可见光。并且由于真手指(活体手指)的光谱特性，真手指本身也可以发出红光波段附近的不可见光，从而经过真手指反射到达光学指纹传感器10的不可见光的强度要大于经过假手指反射到达光学指纹传感器10的不可见光强度，即使经过真手指和假手指反射后到达光学指纹传感器10的光形成的指纹图像相同，光学指纹传感器10也可以通过判断这部分不可见光所形成的图像就可以有效地区分真手指和假手指(非活体手指)，提高了应用该光学指纹传感器10的电子设备100的安全性，提高了装置抗假手指攻击的能力。
需要说明的是，经过真手指反射到达光学指纹传感器10的不可见光形成的图像与经过假手指反射到达光学指纹传感器10的不可见光形成的图像清晰度不同，且图像形状不同。
光学滤光层2与光感元件1层叠设置且位于光感元件1设有凹槽111的一侧，光学滤光层2用来过滤经手指反射后的光，将需要的可见光和不可见光分量准确的滤出来，除去其他成分的光。光学透镜与光学滤光层2层叠设置且位于光学滤光层2的远离光感元件1的一侧。光学透镜起到聚光的作用，将可见光和不可见光汇聚到光感元件1的第一光感层12和第二光感层13上。
根据本申请实施例的光学指纹传感器10，通过在光感元件1的多个凹槽111内设置 用于接收可见光的第一光感层12，且在多个凹槽111的至少部分凹槽111的内壁面与第一光感层12的外壁面之间设置用于接收不可见光的第二光感层13，可以使得光学指纹传感器10可以同时接收可见光信号和不可见光信号，从而可以通过接收手指反射的可见光来形成指纹图像，通过接收经手指反射的不可见光例如红光波段附近的不可见光的成像来有效辨别待测指纹的真假，可以有效地识别出假指纹，提高了应用该光学指纹传感器10的电子设备100的安全性。
在本申请的一些实施例中，如图2所示，多个凹槽111成行成列排布。由此可以简化光感元件1的结构，从而简化光学指纹传感器10的结构。同时可以使得多个第一光感层12排布更加有规则，成像效果更好。当然，本申请不限于此，多个凹槽111还可以不按照行或列排布，即多个凹槽111可以随机排布。
进一步地，如图2所示，每个凹槽111内均设有第二光感层13，由此可以增加接收经手指反射的不可见光例如红光波段附近的不可见光的成像的清晰度，提高真假辨别的精确性。
当然，本申请不限于此，由于用来进行指纹真伪判别的不可见光例如红光波段附近的不可见光成像分辨率要求并不高，如图3-图5所示，位于同一行的多个凹槽111中设有第二光感层13的凹槽111和未设第二光感层13的凹槽111可以交错设置。其中仅设置第一光感层12的凹槽111区域只接收可见光信号，避免为了实现不可见光信号的接收而牺牲接收可见光的第一光感层12的密度，提高了光学指纹传感器10的分辨率。同时设有第一光感层12和第二光感层13的凹槽111区域可以同时接收可见光信号和不可见光信号，由此可以降低光感元件1的成本，从而降低光学指纹传感器10的成本。
进一步地，如图5所示，位于同一列的多个凹槽111中设有第二光感层13的凹槽111和未设第二光感层13的凹槽111交错设置。由此可以进一步降低光感元件1的成本，从而降低光学指纹传感器10的成本。更进一步地，如图5所示，相邻两行的多个第一光感层12交错设置。由此可以使得第二光感层13的分布更加均匀，增加接收经手指反射的不可见光例如红光波段附近的不可见光的成像的清晰度，提高真假辨别的精确性。
如图1和图3所示，第一光感层12和第二光感层13与光感基层11的朝向光学滤光层2的表面平齐。由此可以保证第一光感层12和第二光感层13接收光线的效果，且便于光感元件1与光学滤光片层叠设置。
在本申请的一些实施例中，如图1所示，光学透镜包括多个子光学透镜3，多个子光学透镜3与多个凹槽111一一对应，子光学透镜3与相应的凹槽111正对。由此可以更好地将可见光和不可见光汇聚到光感元件1的第一光感层12和第二光感层13上。
如图1和图3所示，凹槽111在光学滤光层2上的投影位于相应的子光学透镜3在光感基层11上的投影内。也就是说，子光学透镜3可以在垂直光学滤光层2的方向上完全覆盖凹槽111。由此可以更好的保证子光学透镜3对第一光感层12和第二光感层13的聚光效果，保证第一光感层12和第二光感层13接收光信号的效果。
进一步地，多个子光学透镜3为一体成型件。由此可以简化光学透镜的结构，且可以提高装配效率，从而提高上生产效率。
下面参考附图描述根据本申请实施例的电子设备100。
如图6-图8所示，根据本申请实施例的电子设备100，包括壳体20、显示屏30、盖板40、光学指纹传感器10和不可见光发射层50。
具体而言，显示屏30提供电子设备100的显示功能，显示屏30设在壳体20上，显示屏30与壳体20限定出安装空间，盖板40设在壳体20上，盖板40与显示屏30层叠设置且位于显示屏30的远离安装空间的一侧。在本申请的一些实施例中，盖板40可以为玻璃盖板，盖板40可以起到保护显示屏30的作用。光学指纹传感器10设在安装空间内，光感基层11与显示屏30层叠设置，第一光感层12和第二光感层13设在光感基层11的朝向显示屏30的一侧。不可见光发射层50可以朝向盖板40发射不可见光，不可见光发射层50设在光学指纹传感器10与盖板40之间且与盖板40和光学指纹传感器10层叠设置，不可见光发射层50与光学指纹传感器10相对。
在进行屏下光学指纹识别的时候，显示屏30可以发出向上的可见光，不可见光发射层50可以发出向上的不可见光，可见光和不可见光在假手指和真手指的表面进行反射，通过接收经手指反射的不可见光例如红光波段附近的不可见光的成像来有效辨别待测指纹的真假，可以有效地识别出假指纹，提高了应用该光学指纹传感器10的电子设备100的安全性。
下面详细描述根据本申请实施例的电子设备指纹识别的过程。
如图8-图10所示，电子设备100在进行指纹识别时，真手指可以放置在盖板40的与光学指纹传感器10相对的位置，显示屏30可以朝向盖板40方向发出可见光(如图8-图10所示的空心箭头)，可见光透过盖板40到达真手指表面，由于光在指纹谷脊处的反射率不同，从而指纹谷脊处的反射光强弱也不同，光学指纹传感器10经由手指表面反射的不同强弱的光形成指纹图像，从而实现指纹识别功能。如图8-图10所示，假手指的折射率与真手指相同且谷脊分布相同的情况下，光学指纹传感器10经由手指表面反射的光形成的指纹图像相同，无法辨别真伪。
而在指纹识别过程中，不可见光反射层50可以朝向盖板40方向发出不可见光(如 图8-图10中所示的实心箭头)例如红光，不可见光透过盖板到达真手指表面，由于真手指对于不可见光具有特殊的反射、吸收特性，并且真手指本身也可以发出红光波段附近的不可见光，经过真手指反射后的不可见的分量较大，且强度较大，经过真手指反射到达光学指纹传感器10以形成指纹图像。如图8-图10所示，经过假手指反射后的不可见的强度和分量较小，经过假手指反射到达光学指纹传感器10形成的指纹图像清晰度较差，且指纹图像的形状与实际指纹图像的形状有差异，从而可以识别指纹的真假。
根据本申请实施例的电子设备100，通过在光感元件1的多个凹槽111内设置用于接收可见光的第一光感层12，且在多个凹槽111的至少部分凹槽111的内壁面与第一光感层12的外壁面之间设置用于接收不可见光的第二光感层13，可以使得光学指纹传感器10可以同时接收可见光信号和不可见光信号，从而可以通过接收手指反射的可见光来形成指纹图像，通过接收经手指反射的不可见光例如红光波段附近的不可见光的成像来有效辨别待测指纹的真假，可以有效地识别出假指纹，提高了应用该光学指纹传感器10的电子设备100的安全性。
在本申请的一些实施例中，如图8所示，不可见光发射层50贴设在显示屏30的朝向安装空间的表面上。在电子设备100装配过程中，不可见光发射层50可以与显示屏30组装成一个组件进行装配，可以提高装配效率。
当然，本申请不限于此，如图9和图10所示，不可见光发射层50设在盖板40和显示屏30之间。其中，如图9所示，在电子设备100的装配过程中，不可见光发射层50可以与盖板40组装成一个组件进行组装；当然，如图10所示，不可见光发射层50可以与显示屏30组装成一个组件进行装配，可以提高装配效率。
在本申请的一些实施例中，不可见光发射层50的面积小于显示屏30的面积。由此可以节省不可见光发射层50的材料成本。在本申请的一些实施例中，不可见光发射层50可以设在与光学指纹传感器10相对的区域，进一步地，不可见光发射层50在显示屏30上的投影可以与光学指纹传感器10在显示屏30上的投影重合。由此，既可以保证不可见光发射层50对光学指纹传感器10的不可见光的补光效果，又可以降低不可见光发射层50的材料成本。
进一步地，如图11所示，不可见光发射层50包括基板501和不可见光发射单元502，基板501为透明件，由此便于经手指反射的可见光和不可见光穿过基板501被光学指纹传感器10接收。不可见光发射单元502可以发射不可见光，不可见光发射单元502为多个，多个不可见光发射单元502间隔的设在基板501的朝向盖板40的表面上。由此可以使得不可见光发射层50发射的不可见光比较均匀，提高光学指纹传感器10接收经 手指反射的不可见光后成像的效果。
在本申请的一些实施例中，如图11-图13所示，多个不可见光发射单元502成行成列排布。由此可以使得多个不可见光发射单元502分布更加规则，使得不可见光发射层50发射的不可见光比较均匀，提高光学指纹传感器10接收经手指反射的不可见光后成像的效果。当然，本申请不限于此，如图14所示，多个不可见光发射单元502还可以随机分布。
在本申请的一些实施例中，如图11-图13所示，不可见光发射单元502的平行于盖板40的截面为圆形、椭圆形或多边形。例如，在图11和图13所示的示例中，不可见光发射单元502的平行于盖板40的截面为圆形。在图12所示的示例中，不可见光发射单元502的平行于盖板40的截面为方形。在图13所示的示例中，不可见光发射单元502的平行于盖板40的截面为菱形。
在本申请的一些实施例中，显示屏30包括多个间隔开的像素单元，不可见光单元位于多个像素单元限定的间隙内。由此可以保证不可见光发射单元502发出的不可见光可以经过相邻两个像素之间的间隙向上射出。
在本申请的一些实施例中，第二光感层13可接收不可见光的波长范围为小于1000mm。不可见光发射单元502可以为红外发光管。不可见光可以为红外光或近红外光。
根据本申请的电子设备100，可以根据光学指纹传感器10所接收到的不可见光波能量来有效的识别指纹的生物学特征，提高电子设备100的抗二维、三维假指纹攻击的能力。屏下光学指纹传感器10采用第一光感层12和第二光感层13叠设置的结构，其光感元件1的感光区可同时接收可见光和接收不可见光。光感元件1感光区的第一光感层12用来接收经指纹反射回的可见光信号，第二光感层13用来接收手指发出的不可见光信号，从而在同一光感元件1中实现两种光信号的采集。同时，电子设备100采用一层不可见光发射层50进行补光，增强光感元件1所接收到的不可见光强度。通过上述技术的组合，屏下光学指纹传感器10可以有效地辨别出假指纹，提高光学指纹传感器10的防伪能力。
示例性的，电子设备100可以为移动或便携式并执行无线通信的各种类型的计算机系统设备中的任何一种(图6中只示例性的示出了一种形态)。具体地，电子设备100可以为移动电话或智能电话(例如，基于iPhone TM，基于Android TM的电话)，便携式游戏设备(例如Nintendo DS TM，PlayStation Portable TM，Gameboy Advance TM，iPhone TM)、膝上型电脑、PDA、便携式互联网设备、音乐播放器以及数据存储设备，其他手持设备以及诸如手表、入耳式耳机、吊坠、头戴式耳机等，电子设备100还可以 为其他的可穿戴设备(例如，诸如电子眼镜、电子衣服、电子手镯、电子项链、电子纹身、电子设备100或智能手表的头戴式设备(HMD))。
电子设备100还可以是多个电子设备100中的任何一个，多个电子设备100包括但不限于蜂窝电话、智能电话、其他无线通信设备、个人数字助理、音频播放器、其他媒体播放器、音乐记录器、录像机、照相机、其他媒体记录器、收音机、医疗设备、车辆运输仪器、计算器、可编程遥控器、寻呼机、膝上型计算机、台式计算机、打印机、上网本电脑、个人数字助理(PDA)、便携式多媒体播放器(PMP)、运动图像专家组(MPEG-1或MPEG-2)音频层(MP3)播放器，便携式医疗设备以及数码相机及其组合。
在一些情况下，电子设备100可以执行多种功能(例如，播放音乐，显示视频，存储图片以及接收和发送电话呼叫)。如果需要，电子设备100可以是诸如蜂窝电话、媒体播放器、其他手持设备、腕表设备、吊坠设备、听筒设备或其他紧凑型便携式设备的便携式设备。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (20)

  1. 一种光学指纹传感器，其特征在于，包括：
    光感元件，所述光感元件包括光感基层和用于接收可见光的第一光感层，所述光感基层的一侧表面上设有多个凹槽，所述第一光感层为多个，多个所述第一光感层与多个所述凹槽一一对应，所述第一光感层设在相应的所述凹槽内，多个所述凹槽中的至少部分所述凹槽的内壁面与所述第一光感层的外壁面之间设有用于接收不可见光的第二光感层，所述第二光感层包覆所述第一光感层的与所述凹槽的内壁面相对的表面；
    光学滤光层，所述光学滤光层与所述光感元件层叠设置且位于所述光感元件设有所述凹槽的一侧；
    用于聚光的光学透镜，所述光学透镜与所述光学滤光层层叠设置且位于所述光学滤光层的远离所述光感元件的一侧。
  2. 根据权利要求1所述的光学指纹传感器，其特征在于，多个所述凹槽成行成列排布。
  3. 根据权利要求2所述的光学指纹传感器，其特征在于，位于同一行的多个所述凹槽中设有所述第二光感层的所述凹槽和未设所述第二光感层的所述凹槽交错设置。
  4. 根据权利要求3所述的光学指纹传感器，其特征在于，位于同一列的多个所述凹槽中设有所述第二光感层的所述凹槽和未设所述第二光感层的所述凹槽交错设置。
  5. 根据权利要求4所述的光学指纹传感器，其特征在于，相邻两行的多个所述第一光感层交错设置。
  6. 根据权利要求1-5中任一项所述的光学指纹传感器，其特征在于，所述第一光感层和所述第二光感层与所述光感基层的朝向所述光学滤光层的表面平齐。
  7. 根据权利要求1-6中任一项所述的光学指纹传感器，其特征在于，所述光学透镜包括多个子光学透镜，多个所述子光学透镜与多个所述凹槽一一对应，所述子光学透镜与相应的所述凹槽正对。
  8. 根据权利要求7所述的光学指纹传感器，其特征在于，所述凹槽在所述光学滤光层上的投影位于相应的所述子光学透镜在所述光感基层上的投影内。
  9. 根据权利要求7所述的光学指纹传感器，其特征在于，多个所述子光学透镜为一体成型件。
  10. 根据权利要求1-9中任一项所述的光学指纹传感器，其特征在于，所述第一光感层和所述第二光感层为光电二极管。
  11. 根据权利要求1或2所述的光学指纹传感器，其特征在于，每个所述凹槽内均设有所述第二光感层。
  12. 一种电子设备，其特征在于，包括：
    壳体；
    显示屏，所述显示屏设在所述壳体上，所述显示屏与所述壳体限定出安装空间；
    盖板，所述盖板设在所述壳体上，所述盖板与所述显示屏层叠设置且位于所述显示屏的远离所述安装空间的一侧；
    根据权利要求1-11中任一项所述的光学指纹传感器，所述光学指纹传感器设在所述安装空间内，所述光感基层与所述显示屏层叠设置；
    朝向所述盖板发射不可见光的不可见光发射层，所述不可见光发射层设在所述光学指纹传感器与所述盖板之间且与所述盖板和所述光学指纹传感器层叠设置，所述不可见光发射层与所述光学指纹传感器相对。
  13. 根据权利要求12所述的电子设备，其特征在于，所述不可见光发射层贴设在所述显示屏的朝向所述安装空间的表面上。
  14. 根据权利要求12所述的电子设备，其特征在于，所述不可见光发射层设在所述盖板和所述显示屏之间。
  15. 根据权利要求12所述的电子设备，其特征在于，所述不可见光发射层的面积小于所述显示屏的面积。
  16. 根据权利要求15所述的电子设备，其特征在于，所述不可见光发射层在所述显示屏上的投影与所述光学指纹传感器在所述显示屏上的投影重合。
  17. 根据权利要求12所述的电子设备，其特征在于，所述不可见光发射层包括：
    基板，所述基板为透明件；
    不可见光发射单元，所述不可见光发射单元为多个，多个所述不可见光发射单元间隔的设在所述基板的朝向所述盖板的表面上。
  18. 根据权利要求17所述的电子设备，其特征在于，多个所述不可见光发射单元成行成列排布。
  19. 根据权利要求17所述的电子设备，其特征在于，所述不可见光发射单元的平行于所述盖板的截面为圆形、椭圆形或多边形。
  20. 根据权利要求17所述的电子设备，其特征在于，所述显示屏包括多个间隔开的像素单元，所述不可见光单元位于多个所述像素单元限定的间隙内。
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