WO2019196724A1 - 指纹识别装置、识别装置和显示设备 - Google Patents

指纹识别装置、识别装置和显示设备 Download PDF

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Publication number
WO2019196724A1
WO2019196724A1 PCT/CN2019/081308 CN2019081308W WO2019196724A1 WO 2019196724 A1 WO2019196724 A1 WO 2019196724A1 CN 2019081308 W CN2019081308 W CN 2019081308W WO 2019196724 A1 WO2019196724 A1 WO 2019196724A1
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Prior art keywords
light
grating
fingerprint
guiding layer
module
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PCT/CN2019/081308
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English (en)
French (fr)
Inventor
孟宪东
王维
陈小川
王海生
顾品超
高健
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/494,938 priority Critical patent/US11308308B2/en
Publication of WO2019196724A1 publication Critical patent/WO2019196724A1/zh

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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
    • G06V40/1324—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
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors

Definitions

  • Embodiments of the present disclosure relate to a fingerprint recognition device, an identification device, and a display device.
  • display devices can also have fingerprint recognition functions to improve the security of display devices and improve the convenience of fingerprint verification.
  • an embodiment of the present disclosure provides a fingerprint identification device, including: a light transmissive substrate; a light guiding layer, the light guiding layer is disposed on one side of the transparent substrate; a plurality of identification units, a plurality of The identification unit is disposed on the light guiding layer, each of the identification units includes a first grating module, a second grating module, and a detecting module; wherein the first grating module is disposed on the light guiding layer and the Between the light-transmitting substrates, and configured to diffractively couple the fingerprint light having an incident angle within a predetermined angle range to the light guiding layer; the second grating module is disposed at one side of the light guiding layer, The detecting module is disposed on a side of the second grating module facing away from the light guiding layer, and the second grating module is configured to take out the fingerprint light in the light guiding layer to the detecting module The detection module is configured to detect a light intensity of the fingerprint light taken out of the light
  • both the first grating module and the second grating module are in direct contact with the light guiding layer.
  • the first grating module and the second grating module are disposed adjacent to each other on the same side of the light guiding layer.
  • the detection module is configured to detect only fingerprint light rays emitted from the light guiding layer.
  • the detecting module includes a photosensitive layer and a light shielding layer, the photosensitive layer is located between the light shielding layer and the light guiding layer, and the light shielding layer blocks the photosensitive layer.
  • the second grating module is disposed on a side of the light guiding layer facing away from the first grating module.
  • the orthographic projection of the second grating module and the detection module on the light guiding layer overlaps.
  • the predetermined angle of the incident angle of the fingerprint light is in the range of -7 degrees to +4 degrees.
  • each of the first grating modules includes a plurality of light-input grating strips arranged side by side, each of the light-introducing grating strips being configured to diffractly couple the fingerprint light of the corresponding position into the light guiding layer, and The fingerprint light is transmitted in the light guiding layer;
  • each of the second grating modules includes a plurality of outgoing grating strips arranged side by side, and each of the outgoing grating strips is configured to fingerprint the light guiding layer
  • Light is taken out to the detecting module, so that the detecting module detects the light intensity of the fingerprint light.
  • each of the incoming light grating strips and each of the light exiting grating strips are oblique grating strips.
  • an angle between each of the light-introducing grating strips and each of the light-emitting grating strips relative to a normal line perpendicular to the light guiding layer is 10°-30°, and each of the light-introducing gratings
  • the strip and each of the strips of light outgoing grating have a height of from 400 nm to 500 nm.
  • the light transmissive substrate is an OLED display substrate.
  • the OLED display substrate includes a light-transmitting substrate layer and a light-emitting layer, and the light-emitting layer is disposed on a side of the plurality of first grating modules facing away from the light guiding layer, and the light-transmitting substrate layer is disposed at The luminescent layer faces away from one side of the light guiding layer.
  • the light transmissive substrate is an active light emitting substrate.
  • the light guiding layer is located on the back side of the active light emitting substrate.
  • the fingerprint light guided into the light guiding layer by the first grating module is totally reflected by the surface of the light guiding layer away from the first grating module to the second grating module.
  • the thickness of the light guiding layer is less than or equal to 50 microns.
  • the width of each recognition unit is smaller than the sum of the widths of one fingerprint valley and one fingerprint ridge of the fingerprint.
  • an embodiment of the present disclosure further provides an identification device, including: a transparent substrate; a light guiding layer, the light guiding layer is disposed on one side of the transparent substrate; a plurality of identification units, a plurality of The identification unit is disposed on the light guiding layer, each of the identification units includes a first grating module, a second grating module, and a detecting module; wherein the first grating module is disposed on the light guiding layer and the Between the light transmissive substrates, and configured to diffract the light transmitted through the light transmissive substrate and having an incident angle within a predetermined angle range into the light guiding layer; the second grating module is disposed on the a side of the light guiding layer, the detecting module is disposed on a side of the second grating module facing away from the light guiding layer, and the second grating module is configured to light the light in the light guiding layer And being taken out to the detecting module, wherein the detecting module is configured to detect a light
  • an embodiment of the present disclosure further provides a display device, including: the fingerprint identification device or the identification device.
  • FIG. 1 is a schematic structural diagram of a fingerprint identification apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a fingerprint identification apparatus according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a fingerprint identification apparatus according to another embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a fingerprint identification apparatus according to another embodiment of the present disclosure.
  • the structure for fingerprint recognition in the current display device generally includes a small aperture filter structure, a lens and a grating structure, so that although the fingerprint information can be obtained, the structure of the display device is too Complex, resulting in an overall thickness of the display device is too thick.
  • an embodiment of the present disclosure provides a fingerprint identification device including a light-transmitting substrate 1 , a light guiding layer 2 and a plurality of identification units 3 , and the light guiding layer 2 is disposed on the light-transmitting layer 2 .
  • One side of the substrate 1; the plurality of identification units 3 are disposed on the light guiding layer 2, and each of the identification units 3 includes a first grating module 31, a second grating module 32, and a detection module 33.
  • the first grating module 31 is disposed between the light guiding layer 2 and the transparent substrate 1 and is used to set the incident angle to a fingerprint light within a preset angle range (the fingerprint light is carried with fingerprint information).
  • Light rays for example, light reflected by the fingerprint, are diffracted and coupled to the light guiding layer 2 for transmission;
  • the second grating module 32 is disposed at one side of the light guiding layer 2, and the second grating module 32 is configured to take out the fingerprint light in the light guiding layer.
  • the detecting module 33 is disposed on a side of the second grating module 32 facing away from the light guiding layer 2, and the detecting module 33 is configured to detect the light of the fingerprint light taken out from the light guiding layer 2 by the second grating module 32. strength.
  • the transparent substrate 1 is used for acquiring fingerprint information.
  • the user's finger can touch the light-transmitting substrate 1 , and the light reflected by the fingerprint on the finger (ie, the fingerprint light) can be The light-transmitting substrate 1 is transmitted to the above-mentioned identification unit 3, and the fingerprint is acquired by the recognition unit 3 and the light guiding layer 2.
  • each of the plurality of identification units is configured to accurately acquire a fingerprint ray corresponding to a position of the fingerprint, and the fingerprint ray is first introduced into the light guiding layer 2 and then extracted from the light guiding layer 2, Then, it is transmitted to the detecting module 33.
  • the intensity of the fingerprint light can be detected by the detecting module 33.
  • the intensity of the fingerprint light can be used to determine whether the fingerprint of the position is a peak (ridge of the fingerprint) or a valley (a valley of the fingerprint), thereby acquiring the fingerprint information.
  • Each of the identification units 3 may include a first grating module 31, a second grating module 32 and a detection module 33, and each identification unit 3 only fingerprints a preset area of the finger fingerprint corresponding to the identification unit 3, such that The plurality of identification units 3 can perform fingerprint identification on the complete fingerprint information of the finger fingerprint to ensure the accuracy of the fingerprint recognition. It can also be understood that each recognition unit 3 only recognizes a small portion of the corresponding finger fingerprint (ie, the preset area, It is for example a fingerprint valley or a fingerprint ridge).
  • the width of each recognition unit 3 in the arrangement direction of the plurality of recognition units 3 (horizontal directions of FIGS. 1 and 3) The width of one fingerprint valley smaller than the fingerprint and the width of one fingerprint ridge.
  • the width of each identification unit 3 is far from the edge of the first grating module 31 away from the second grating module 32 to the second grating module 32 away from the first grating module 31.
  • the distance between the edges is less than 500 microns, such as less than 400 microns, such as less than 300 microns.
  • the first grating module 31 may be designed such that the fingerprint light in its corresponding preset region can only be diffracted and coupled into the light guiding layer 2 for transmission.
  • the fingerprint light of other regions cannot be totally reflected in the light guiding layer 2 due to the light angle, and thus cannot be transmitted in the light guiding layer 2;
  • the second grating module 32 is mainly used for transmitting the light guiding layer 2
  • the fingerprint light is taken out, and the second grating module 32 can only take out the fingerprint light of the corresponding first grating module 31 that is diffractively coupled to the light guiding layer 2, and then the detection module 33 detects the intensity of the extracted fingerprint light.
  • the intensity of the light can be used to determine whether the preset area of the finger fingerprint corresponding to the fingerprint information is a peak or a trough, thereby realizing the recognition of the finger fingerprint.
  • the fingerprint of the finger when a finger touches the light-transmitting substrate 1 , the fingerprint of the finger reflects the light (for example, the light emitted by the light source included in the transparent substrate 1 ) into the transparent substrate 1 and is irradiated through the transparent substrate 1 to In the first grating module 31, the first grating module 31 only diffracts the fingerprint light having an incident angle within a preset angle range into the light guiding layer 2 for transmission; then, the second grating module 32 can correspond to the first one. After the grating module 31 is introduced into the light guiding layer 2, the reflected fingerprint light is taken out, and the fingerprint light is transmitted to the detecting module 33, and the intensity of the fingerprint light can be detected by the detecting module 33.
  • the intensity is greater than the preset value, it indicates that the fingerprint area corresponding to the fingerprint light having the preset angle range filtered by the first grating module 31 is a peak; if the intensity is less than the preset value, the first grating module 31 is filtered.
  • the fingerprint area corresponding to the fingerprint light having the preset angle range is a trough; in this case, the fingerprint information of the finger can be realized by the detection of the plurality of identification units.
  • the embodiment of the present disclosure provides a fingerprint identification device for simplifying the structure of the fingerprint recognition device and making it more lightweight.
  • the fingerprint identification device provided by the present application comprises a light transmissive substrate, a light guiding layer and a plurality of identification units disposed on the light guiding layer, the identification unit comprises a first grating module, a second grating module and a detecting module, and the first grating module is configured One side of the light guiding layer is configured to diffract the fingerprint light having an incident angle within a preset angle range into the light guiding layer, and the second grating module is configured to take the fingerprint light in the light guiding layer to the detecting module.
  • the detecting module is configured to detect the light intensity of the fingerprint light, and the intensity of the light can be used to determine whether the fingerprint area corresponding to the preset angle range is a peak or a trough, and then the fingerprint information of the finger is obtained.
  • the above structure is simpler and lighter, which not only reduces costs, but also improves the user experience.
  • the above-mentioned identification unit 3 can have various arrangement manners. As shown in FIG. 1 , for example, the first grating module 31 and the second grating module 32 are disposed adjacent to the same side of the light guiding layer 2 . In this embodiment, the first grating module 31 and the second grating module 32 may be disposed in the same layer and arranged adjacent to each other, and the detection principle is: the fingerprint light having the incident angle within the preset angle range is irradiated on the first grating module.
  • the fingerprint light enters into the light guiding layer 2 under the diffraction of the first grating module 31, and can be totally reflected by the bottom after reaching the bottom of the light guiding layer 2 (the lower surface of the light guiding layer 2)
  • the angle ⁇ in FIG. 2 is greater than or equal to the total reflection angle at the lower surface), and then the top of the light guiding layer 2; when the fingerprint light contacts the top of the light guiding layer 2, the fingerprint light can be set at the
  • the second grating module 32 at the position is taken out from the light guiding layer 2 and transmitted to the detecting module 33.
  • the detection module 33 can detect the intensity of the fingerprint light, thereby realizing the identification of the fingerprint.
  • the identification unit 3 The structure is more compact, the space utilization is high, and the thickness is reduced.
  • the detecting module 33 is configured to detect only the fingerprint light emitted from the light guiding layer 2 That is, the detecting module 33 detects only the fingerprint light that is irradiated onto the surface of the light guiding layer 2 (the lower surface of the detecting module 33 in FIG. 1).
  • the detecting module 33 In order to enable the detecting module 33 to detect only the fingerprint light irradiated to the lower surface thereof to improve the accuracy of fingerprint recognition, for example, as shown in FIG. 4, the detecting module 33 includes a photosensitive layer 331 and a light shielding layer 332, and the photosensitive layer 331 is located at the light shielding layer 332. Between the light guiding layer 2 and the light shielding layer 332 blocks the photosensitive layer 331.
  • the detection module 33 is a phototransistor, a photodiode, or other type of photodetector.
  • the first grating module 31 and the second grating module 32 may have other relative arrangement modes besides being disposed on the same side. As shown in FIG. 3, for example, the second grating module 32 is disposed on a side of the light guiding layer 2 facing away from the first grating module 31. In this embodiment, the first grating module 31 and the second grating module 32 may be respectively disposed on two sides of the light guiding layer 2, as shown in FIG.
  • the first grating module 31 may be disposed on the upper side of the light guiding layer 2
  • the second grating module 32 can be disposed on the lower side of the light guiding layer 2
  • the detecting principle is that the fingerprint light having the incident angle within the preset angle range is irradiated on the first grating module 31; the first grating module 31 can The fingerprint light is diffracted and coupled into the light guiding layer 2 to transmit the fingerprint light from the lower side of the light guiding layer 2 to the lower side of the light guiding layer 2; when the fingerprint light contacts the lower side of the light guiding layer 2, the fingerprint light can
  • the second grating module 32 located at the lower side of the light guiding layer 2 is taken out from the light guiding layer 2 to the detecting module 33; and the detection module 33 is used to detect the strength of the fingerprint light, thereby realizing the fingerprint identification.
  • the above structure is more convenient to set up and the structure is also very simple.
  • no other film is disposed between each of the first grating module 31 and the second grating module 32 and the light guiding layer 2 (ie, the first grating module 31 and the first Each of the two grating modules 32 is in direct contact with the light guiding layer 2 to prevent the film from affecting the direction of transmission of the fingerprint light.
  • the orthographic projections of the second grating module 32 and the detection module 33 on the light guiding layer 2 overlap, which facilitates illumination of the fingerprint light emitted from the second grating module 32. Go to the detection module 33.
  • the preset angle range of the above-mentioned fingerprint light incident angle may be various.
  • the preset angle of the incident angle of the fingerprint light ranges from -7 degrees to +4 degrees.
  • the verticality of the fingerprint light is better, thereby facilitating each recognition unit to recognize only one fingerprint valley or one fingerprint ridge, that is, to avoid avoiding the same fingerprint.
  • the fingerprint light of the valley or the same fingerprint ridge is recognized by the plurality of recognition units 3, which is advantageous for improving the accuracy of fingerprint recognition.
  • the fingerprint light in the predetermined angle range satisfies both the total reflection condition on the lower surface of the light guiding layer 2 and the sufficient transmission energy.
  • the grating tilt angle (the angle of the grating strip with respect to the normal line perpendicular to the light guiding layer 2) is 20 degrees, the duty ratio is 50%, and the grating groove
  • the angle of incidence of the total reflection condition is -24° to +4°
  • the angle of incidence of the energy requirement is -7° to +24°.
  • the intersection of the two conditions is - From 7 degrees to +4 degrees, the fingerprint light in this range of angles can satisfy both the total reflection condition and the diffraction energy.
  • the positive degree indicates that the fingerprint light is incident from the right side of the normal line (shown by the broken line at the position of the first grating module 31 in FIG. 2)
  • the negative degree indicates that the light is incident from the left side of the normal line.
  • each of the first grating modules 31 includes a plurality of light-introducing grating strips arranged side by side, each of the light-introducing grating strips for diffractively coupling the fingerprint light of the corresponding position into the light guiding layer 2, and The fingerprint light is transmitted in the light guiding layer 2;
  • each of the second grating modules 32 includes a plurality of outgoing grating strips arranged side by side, and each of the outgoing grating strips is used for taking out the fingerprint light in the light guiding layer 2 to the detecting module 33. So that the detection module 33 detects the light intensity of the fingerprint light.
  • both the light-input grating strip and the light-emitting grating strip may be made of a transparent material, and the fingerprint light may be diffracted and coupled into the light guiding layer 2 through the light-introducing grating strip, and the light-emitting grating strip may be used to guide the light guiding layer.
  • the fingerprint light in 2 is taken out to the detecting module 33 for detecting the intensity of the fingerprint light.
  • each of the incoming grating strips and each of the outgoing grating strips are inclined grating strips.
  • the entrance light grating strip and the light exit grating strip in the same identification unit are inclined in opposite directions.
  • the oblique grating strip can facilitate the diffraction coupling of the fingerprint light into the light guiding layer at a predetermined incident angle, and enable the fingerprint light to be transmitted in the light guiding layer.
  • the fingerprint light filtered by the first grating module 31 can be made by setting the tilt angle of the light-introducing grating strip (ie, the grating tilt angle described above) and the height (ie, the grating groove depth described above) (the filtered fingerprint light can be filtered)
  • the second grating module 32 is led to the detecting module 33) for better verticality (for example, the incident angle of the filtered fingerprint light is -7 degrees to +4 degrees).
  • the exit grating strip can have the same angle of inclination and height as the incoming grating strip.
  • each of the light-introducing grating strips and each of the light-emitting grating strips has an angle of 10°-30° with respect to a normal line perpendicular to the light guiding layer 2, and each of the light-introducing grating strips and each of the light-emitting grating strips The height is 400 nm - 500 nm.
  • the light transmissive substrate 1 is an active light emitting substrate such as an OLED (Organic Light Emitting Diode) substrate, a quantum dot light emitting substrate, or any other type of substrate capable of actively emitting light.
  • the light guiding layer 2 is located on the back side (non-light emitting side) of the active light emitting substrate, and the fingerprint reflects the light emitted from the active light emitting substrate to form fingerprint light.
  • the thickness of the light guiding layer 2 is on the order of microns, for example, the thickness of the light guiding layer 2 is less than or equal to 50 microns.
  • Embodiments of the present disclosure facilitate a fingerprint recognition device having a smaller thickness than a fingerprint recognition device including a small aperture filter structure, a lens, and a grating structure.
  • the fingerprint recognition device described above may have a display function in addition to fingerprint recognition.
  • the transparent substrate 1 is an OLED display substrate.
  • the fingerprint light of the finger (which is formed by reflecting light from the OLED by the finger) can be irradiated onto the identification unit 3 through the OLED display substrate to perform fingerprinting.
  • the OLED display substrate includes a light-transmitting substrate layer (for example, a light-transmitting layer such as a glass layer, a plastic layer or a quartz layer) 11 and a light-emitting layer 12, and the light-emitting layer 12 is disposed on the plurality of first grating modules 31 facing away from the light guiding layer 2
  • the light-transmitting substrate layer 11 is disposed on a side of the light-emitting layer 12 facing away from the light-guiding layer 2.
  • the light-transmitting substrate layer 11 is disposed on the outermost side for protecting the internal structure of the display substrate, and the light-emitting layer 12 can realize the display of an image by emitting light of the same color.
  • the display substrate may have other functional layers, which are not described herein.
  • an embodiment of the present disclosure further provides an identification device including a transparent substrate, a light guiding layer, and a plurality of identification units; the light guiding layer is disposed on one side of the transparent substrate; the plurality of identification units are disposed at Each of the recognition units includes a first grating module, a second grating module, and a detection module; the first grating module is disposed between the light guiding layer and the transparent substrate, and is configured to pass through the transparent substrate and The light incident in the range of the predetermined angle is diffracted and coupled to the light guiding layer; the second grating module is disposed on one side of the light guiding layer, and the detecting module is disposed on a side of the second grating module facing away from the light guiding layer, The two grating modules are configured to take light from the light guiding layer onto the detecting module, and the detecting module is configured to detect the light intensity of the light taken out from the light guiding layer.
  • the identification device may be used to identify a fingerprint, and may also be used to identify a touch location or to identify other information, which is not limited by the embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a display device, including: the fingerprint identification device or the identification device described above.
  • the display device may be any product or component having a display function such as a display panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a display panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the embodiments of the present disclosure provide a fingerprint identification device, an identification device, and a display device, which are used to simplify the structure of the identification device and make it more lightweight.
  • the fingerprint identification device in the embodiment of the present disclosure includes a light transmissive substrate, a light guiding layer, and a plurality of identification units disposed on the light guiding layer, wherein the identification unit includes a first grating module, a second grating module, and a detection module, first The grating module is disposed on one side of the light guiding layer for diffractively coupling the fingerprint light having an incident angle within a preset angular range into the light guiding layer, and the second grating module is configured to be used in the light guiding layer
  • the fingerprint light is taken out to the detecting module, and the detecting module is configured to detect the light intensity of the fingerprint light, and the intensity of the light can determine whether the fingerprint region corresponding to the fingerprint light having the incident angle is a preset angle range is a peak or a trough

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Abstract

一种指纹识别装置、识别装置和显示设备，包括：透光基板(1)；导光层(2)，设置于透光基板(1)的一侧；多个识别单元(3)设置在导光层(2)上，每个识别单元(3)包括第一光栅模块(31)、第二光栅模块(32)和检测模块(33)；第一光栅模块(31)设置于导光层(2)和透光基板(1)之间，用于将入射角为预设角度范围内的指纹光线衍射耦合至导光层(2)内传输；第二光栅模块(32)设置于导光层(2)的一侧，检测模块(33)设置于第二光栅模块(32)背离于导光层(2)的一侧，第二光栅模块(32)用于将导光层(2)内的指纹光线取出至检测模块(33)上，检测模块(33)用于检测指纹光线的光线强度。

Description

指纹识别装置、识别装置和显示设备
对相关申请的交叉参考
本申请要求于2018年4月11日递交的中国专利申请第201810318613.8号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开实施例涉及一种指纹识别装置、识别装置和显示设备。
背景技术
随着显示技术的快速发展，显示设备的功能也逐步增多，例如，显示设备除了可以进行图像显示外，还可以具有指纹识别功能，以提高显示设备使用的安全性，提高指纹验证的方便性。
发明内容
一方面，本公开实施例提供了一种指纹识别装置，其包括：透光基板；导光层，所述导光层设置于所述透光基板的一侧；多个识别单元，多个所述识别单元设置在所述导光层上，每个所述识别单元包括第一光栅模块、第二光栅模块和检测模块；其中，所述第一光栅模块设置于所述导光层和所述透光基板之间，并且被配置为将入射角为预设角度范围内的指纹光线衍射耦合至所述导光层内传输；所述第二光栅模块设置于所述导光层的一侧，所述检测模块设置于所述第二光栅模块背离于所述导光层的一侧，所述第二光栅模块被配置为将所述导光层内的所述指纹光线取出至所述检测模块上，所述检测模块被配置为检测被所述第二光栅模块从所述导光层内取出的所述指纹光线的光线强度。
例如，所述第一光栅模块和所述第二光栅模块都与所述导光层直接接触。
例如，所述第一光栅模块和所述第二光栅模块相邻设置于所述导光层的同一侧。
例如，所述检测模块被配置为只检测从所述导光层射出的指纹光线。
例如，所述检测模块包括感光层和遮光层，所述感光层位于所述遮光层和所述导光层之间，并且所述遮光层遮挡所述感光层。
例如，所述第二光栅模块设置于所述导光层背离于所述第一光栅模块的一侧。
例如，所述第二光栅模块和所述检测模块在所述导光层上的正投影交叠。
例如，所述指纹光线入射角的所述预设角度范围为-7度至+4度。
例如，每个所述第一光栅模块包括多个并排设置的入光光栅条，每个所述入光光栅条被配置为将对应位置的指纹光线衍射耦合至所述导光层内，并使所述指纹光线在所述导光层内传输；每个所述第二光栅模块包括多个并排设置的出光光栅条，每个所述出光光栅条被配置为将所述导光层内的指纹光线取出至所述检测模块，以使所述检测模块检测所述指纹光线的光线强度。
例如，每个所述入光光栅条和每个所述出光光栅条均为倾斜的光栅条。
例如，每个所述入光光栅条和每个所述出光光栅条的相对于与所述导光层相垂直的法线的夹角为10°-30°，且每个所述入光光栅条和每个所述出光光栅条的高度为400纳米-500纳米。
例如，所述透光基板为OLED显示基板。
例如，所述OLED显示基板包括透光衬底层和发光层，所述发光层设置于多个所述第一光栅模块背离于所述导光层的一侧，所述透光衬底层设置于所述发光层背离于所述导光层的一侧。
例如，所述透光基板为主动发光基板。
例如，所述导光层位于所述主动发光基板的背侧。
例如，被所述第一光栅模块导入所述导光层内的所述指纹光线被所述导光层的远离所述第一光栅模块的表面全反射至所述第二光栅模块。
例如，所述导光层的厚度小于或等于50微米。
例如，在所述多个识别单元的排列方向上，每个识别单元的宽度小于指纹的一个指纹谷和一个指纹脊的宽度之和。
另一方面，本公开实施例还提供一种识别装置，其包括：透光基板；导光层，所述导光层设置于所述透光基板的一侧；多个识别单元，多个所述识别单元设置在所述导光层上，每个所述识别单元包括第一光栅模块、第二光 栅模块和检测模块；其中，所述第一光栅模块设置于所述导光层和所述透光基板之间，并且被配置为将透过所述透光基板且入射角为预设角度范围内的光线衍射耦合至所述导光层内传输；所述第二光栅模块设置于所述导光层的一侧，所述检测模块设置于所述第二光栅模块背离于所述导光层的一侧，所述第二光栅模块被配置为将所述导光层内的所述光线取出至所述检测模块上，所述检测模块被配置为检测被所述第二光栅模块从所述导光层内取出的所述光线的光线强度。
另一方面，本公开实施例还提供一种显示设备，其包括：所述的指纹识别装置或所述的识别装置。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为本公开一种实施例提供的指纹识别装置的结构示意图；
图2为本公开实施例提供的指纹识别装置的原理图；
图3为本公开另一种实施例提供的指纹识别装置的结构示意图；
图4为本公开另一种实施例提供的指纹识别装置的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不 排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
以下结合附图及较佳实施例，对依据本公开实施例提出的指纹识别装置、识别装置和显示装置的具体实施方式、结构、特征及其功效进行详细说明。
本申请的发明人在研究中注意到，目前的显示设备中用于指纹识别的结构一般包括小孔滤光结构、透镜和光栅结构，这样虽然可以获取到指纹信息，但是显示设备的结构却过于复杂，导致显示设备的整体厚度过厚。
如图1、图2和图3所示，本公开实施例提供了一种指纹识别装置，其包括透光基板1、导光层2和多个识别单元3，导光层2设置于透光基板1的一侧；该多个识别单元3设置在导光层2上，每个识别单元3包括第一光栅模块31、第二光栅模块32和检测模块33。在该指纹识别装置中，第一光栅模块31设置于导光层2和透光基板1之间，并且用于将入射角为预设角度范围内的指纹光线(指纹光线为携带有指纹信息的光线，例如为指纹反射的光线)衍射耦合至导光层2内传输；第二光栅模块32设置于导光层2的一侧，第二光栅模块32用于将导光层内的指纹光线取出至检测模块33上；检测模块33设置于第二光栅模块32背离于导光层2的一侧，检测模块33用于检测被第二光栅模块32从导光层2内取出的指纹光线的光线强度。
在本公开实施例中，透光基板1用于指纹信息的获取，当需要指纹识别验证时，用户的手指可以触摸在透光基板1上，手指上指纹反射的光线(即，指纹光线)可以透过透光基板1传递至上述的识别单元3内，通过识别单元3和导光层2进行指纹的获取。
在本公开实施例中，多个识别单元中的每个用于准确地获取对应指纹的位置的指纹光线，该指纹光线先被导入导光层2内、之后被从导光层2内导出、然后被传递给检测模块33，通过检测模块33可以检测该指纹光线的强度，通过指纹光线的强度可以判断该位置的指纹为波峰(指纹的脊)还是波谷(指纹的谷)，进而获取指纹信息图形，以便实现身份的识别和验证。
每个识别单元3可以包括第一光栅模块31、第二光栅模块32和检测模块33，而每个识别单元3仅对手指指纹的对应于该识别单元3的预设区域进 行指纹识别，这样通过多个识别单元3可以将手指指纹的完整指纹信息进行指纹识别，以保证指纹识别的准确性；也可以理解为每个识别单元3只识别对应手指指纹的一小部分区域(即预设区域，其例如为一个指纹谷或者一个指纹脊)。
例如，为了便于使每个识别单元3只识别对应手指指纹的一小部分区域，在上述多个识别单元3的排列方向(图1和图3的水平方向)上，每个识别单元3的宽度小于指纹的一个指纹谷和一个指纹脊的宽度之和，每个识别单元3的宽度为第一光栅模块31的远离第二光栅模块32的边缘到第二光栅模块32的远离第一光栅模块31的边缘之间的距离。例如，每个识别单元3在上述多个识别单元3的排列方向上的宽度小于500微米，例如小于400微米，例如小于300微米。
例如，为了避免其他区域对该识别单元3的影响，可以通过对第一光栅模块31的设计，使其仅能将其对应的预设区域内的指纹光线衍射耦合至导光层2内进行传输，而其他区域的指纹光线由于光线角度的原因，无法在导光层2内实现全反射，进而无法在导光层2内传输；第二光栅模块32主要用于将导光层2内传输的指纹光线取出，可以根据设计，使第二光栅模块32仅能够取出其对应的第一光栅模块31衍射耦合至导光层2的指纹光线，然后再通过检测模块33来检测取出的指纹光线的强度，通过光线的强度可以判断该指纹信息所对应的手指指纹的预设区域为波峰还是波谷，进而实现了手指指纹的识别。
例如，当手指触摸在透光基板1上时，手指的指纹将光线(其例如为透光基板1包括的光源发出的光线)反射至透光基板1内，并穿过透光基板1照射至第一光栅模块31内，而第一光栅模块31仅将入射角为预设角度范围内的指纹光线衍射耦合至导光层2内传输；然后，第二光栅模块32可以将其对应的第一光栅模块31导入导光层2内后发生反射的指纹光线取出，并将该指纹光线传递给检测模块33，通过检测模块33可以检测该指纹光线的强度。若强度大于预设值，则说明该第一光栅模块31所筛选的具有预设角度范围的指纹光线对应的指纹区域为波峰；若强度小于预设值，则说明该第一光栅模块31所筛选的具有预设角度范围的指纹光线对应的指纹区域为波谷；在这种情况下，通过多个识别单元的检测就可以实现手指的指纹信息。
本公开实施例提供了一种指纹识别装置，用于实现指纹识别装置结构的简易化，使其更加的轻薄。本申请提供的指纹识别装置，包括透光基板、导光层以及设置在导光层上的多个识别单元，识别单元包括第一光栅模块、第二光栅模块和检测模块，第一光栅模块设置于导光层的一侧用于将入射角为预设角度范围内的指纹光线衍射耦合至导光层内传输，而第二光栅模块用于将导光层内的指纹光线取出至检测模块，检测模块用于检测指纹光线的光线强度，通过光线的强度可以判断入射角为预设角度范围对应的指纹区域为波峰还是波谷，进而获取手指的指纹信息。上述的结构更加的简单轻薄，不仅能够降低成本，还可以提高用户体验。
上述识别单元3可以具有多种设置方式，如图1所示，例如，第一光栅模块31和第二光栅模块32相邻设置于导光层2的同一侧。本实施例中，第一光栅模块31和第二光栅模块32可以设置于同一层中且相邻并排设置，其检测原理为：入射角为预设角度范围内的指纹光线照射在第一光栅模块31上；在第一光栅模块31的衍射作用下该指纹光线进入到导光层2内，在到达导光层2的底部(导光层2的下表面)后能够被底部全反射(此时图2中的角度θ大于或等于该下表面处的全反射角)，之后射向导光层2的顶部；当该指纹光线接触到导光层2的顶部时，该指纹光线能够被设置在该位置处的第二光栅模块32从导光层2中取出，并传输至检测模块33上，通过检测模块33能够检测该指纹光线的强度，进而实现指纹的识别，上述实施例中识别单元3的结构设置更加的紧凑，空间利用率高，减小了厚度。
在第一光栅模块31和第二光栅模块32设置于导光层2的面向透光基板1的一侧的情况下，由于一部分被指纹反射的光线可能照射到检测模块33的面向透光基板1的表面(图1中检测模块33的上表面)，因此，为避免该部分光线对检测模块33的检测结果造成影响，例如，检测模块33被配置为只检测从导光层2射出的指纹光线，即检测模块33只检测照射到其面向导光层2的表面(图1中检测模块33的下表面)的指纹光线。
为了使检测模块33只检测照射到其下表面的指纹光线以提高指纹识别的准确度，例如，如图4所示，检测模块33包括感光层331和遮光层332，感光层331位于遮光层332和导光层2之间，并且遮光层332遮挡感光层331。例如，检测模块33为光敏三极管、光敏二极管或其它类型的光探测器。
上述第一光栅模块31和第二光栅模块32除了可以设置在同一侧外，还可以具有其他的相对设置方式。如图3所示，例如，第二光栅模块32设置于导光层2背离于第一光栅模块31的一侧。本实施例中，第一光栅模块31和第二光栅模块32可以分别设置于导光层2的两侧，如图3所示，第一光栅模块31可以设置在导光层2的上侧，而第二光栅模块32可以设置在导光层2的下侧，其检测原理为：入射角为预设角度范围内的指纹光线照射在第一光栅模块31上；第一光栅模块31能够将该指纹光线衍射耦合至导光层2内传输，使指纹光线从导光层2的上侧向导光层2的下侧传播；当指纹光线接触到导光层2的下侧时，该指纹光线能够被位于导光层2下侧位置的第二光栅模块32从导光层2中取出至检测模块33处；并通过检测模块33来检测该指纹光线的强弱，进而实现指纹的识别。上述结构设置起来更加的方便，结构也非常的简单。
例如，在图1和图3所示实施例中，第一光栅模块31和第二光栅模块32中的每个与导光层2之间都未设置其它薄膜(即第一光栅模块31和第二光栅模块32中的每个都与导光层2直接接触)，以避免该薄膜影响指纹光线的传输方向。
例如，在图1和图3所示实施例中，第二光栅模块32和检测模块33在导光层2上的正投影交叠，这样有利于使从第二光栅模块32射出的指纹光线照射到检测模块33。
上述指纹光线入射角的预设角度范围可以为多种。例如，指纹光线入射角的预设角度范围为-7度至+4度。本实施例中，一方面，在该角度范围内，指纹光线的垂直性较好，从而有利于使每个识别单元只识别一个指纹谷或一个指纹脊，也就是说，有利于避免来自同一指纹谷或同一指纹脊的指纹光线被多个识别单元3识别，这样有利于提高指纹识别的准确度。另一方面，该预设角度范围内的指纹光线既满足在导光层2的下表面发生全反射条件，又具有足够的传输能量。例如，当第一光栅模块31的光栅周期为500nm、光栅倾斜角度(光栅条的相对于与导光层2相垂直的法线的夹角)为20度、占空比为50％、光栅槽深为500nm时，满足全反射条件的入射角的角度范围为-24°至+4°，而满足能量需求的入射角角度范围为-7°～+24°，取两个条件的交集为-7度至+4度，因此在该角度范围内的指纹光线可以既满足全反射条件， 还可以保证衍射能量。需要说明的是，度数为正表示指纹光线从法线(如图2中第一光栅模块31所在位置处的虚线所示)的右侧入射，度数为负表示从法线的左侧入射。
上述的第一光栅模块31和第二光栅模块32的具体结构可以为多种。例如，如图2所示，每个第一光栅模块31包括多个并排设置的入光光栅条，每个入光光栅条用于将对应位置的指纹光线衍射耦合至导光层2内，并使指纹光线在导光层2内传输；每个第二光栅模块32包括多个并排设置的出光光栅条，每个出光光栅条用于将导光层2内的指纹光线取出至检测模块33，以使检测模块33检测指纹光线的光线强度。
本实施例中，例如，入光光栅条和出光光栅条均可以由透明材质制成，通过入光光栅条可以将指纹光线衍射耦合至导光层2内，而出光光栅条可以将导光层2内的指纹光线取出至检测模块33，用于对该指纹光线的强度进行检测。
例如，每个入光光栅条和每个出光光栅条均为倾斜的光栅条。例如，同一识别单元中的入光光栅条和出光光栅条的倾斜方向相反。本实施例中，通过倾斜的光栅条可以有利于将指纹光线按预设入射角度衍射耦合至导光层内，并使指纹光线能够在导光层内传输。
例如，可以通过设置入光光栅条的倾斜角度(即上述的光栅倾斜角度)以及高度(即上述的光栅槽深)，使第一光栅模块31所筛选的指纹光线(该被筛选的指纹光线能够在进入导光层2后被第二光栅模块32导出至检测模块33)具有较好的垂直性(例如，该被筛选的指纹光线的入射角为-7度至+4度)。例如，可以使出光光栅条具有与入光光栅条相同的倾斜角度和高度。例如，每个入光光栅条和每个出光光栅条的相对于与导光层2相垂直的法线的夹角为10°-30°，且每个入光光栅条和每个出光光栅条的高度为400纳米-500纳米。
在本公开的至少一个实施例中，例如，透光基板1为主动发光基板，例如OLED(有机发光二极管)基板、量子点发光基板或者其它任意类型的能够主动发光的基板。在这种情况下，例如，导光层2位于主动发光基板的背侧(非发光侧)，指纹反射主动发光基板发出的光以形成指纹光线。
例如，在本公开任一实施例中，导光层2的厚度为微米量级，例如导光 层2的厚度小于或等于50微米。与包括小孔滤光结构、透镜和光栅结构的指纹识别装置相比，本公开实施例有利于使指纹识别装置具有较小的厚度。
例如，上述的指纹识别装置除了可以进行指纹识别外，还可以具有显示功能。例如，上述透光基板1为OLED显示基板，本实施例中，手指的指纹光线(其通过手指反射来自OLED的光线而形成)可以透过OLED显示基板照射至识别单元3上，以进行指纹的识别，另外，还可以通过OLED的显示基板进行图像显示，丰富了指纹识别装置的功能。
例如，上述OLED显示基板包括透光衬底层(例如玻璃层、塑料层或石英层等透光层)11和发光层12，发光层12设置于多个第一光栅模块31背离于导光层2的一侧，透光衬底层11设置于发光层12背离于导光层2的一侧。本实施例中，透光衬底层11设置于最外侧，用于保护显示基板的内部结构，而发光层12可以通过发出同颜色的光来实现图像的显示。除了发光层12和透光衬底层11外，显示基板还可以具体有种其他的功能层，在此不作一一赘述。
另一方面，本公开实施例还提供了一种识别装置，其包括透光基板、导光层和多个识别单元；导光层设置于透光基板的一侧；该多个识别单元设置在导光层上，每个识别单元包括第一光栅模块、第二光栅模块和检测模块；第一光栅模块设置于导光层和透光基板之间，并且被配置为将透过透光基板且入射角为预设角度范围内的光线衍射耦合至导光层内传输；第二光栅模块设置于导光层的一侧，检测模块设置于第二光栅模块背离于导光层的一侧，第二光栅模块被配置为将导光层内的光线取出至检测模块上，检测模块被配置为检测从导光层内取出的光线的光线强度。
该识别装置中的透光基板、导光层和识别单元的设置方式可参考指纹识别装置的实施例中的相关描述，重复之处不再赘述。
该识别装置可以用于识别指纹，也可以用于识别触控位置或者用于识别其它信息，本公开实施例对此不做限定。
另一方面，本公开实施例提供了一种显示设备，其包括：上述的指纹识别装置或识别装置。
例如，该显示装置可以为显示面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本公开实施例提供了一种指纹识别装置、识别装置和显示设备，用于实现识别装置结构的简易化，使其更加的轻薄。本公开实施例中的指纹识别装置包括透光基板、导光层以及设置在导光层上的多个识别单元，其中，识别单元包括第一光栅模块、第二光栅模块和检测模块，第一光栅模块设置于导光层的一侧用于将入射角为预设角度范围内的指纹光线衍射耦合至所述导光层内传输，而第二光栅模块用于将所述导光层内的所述指纹光线取出至所述检测模块，所述检测模块用于检测所述指纹光线的光线强度，通过光线的强度可以判断入射角为预设角度范围的指纹光线对应的指纹区域为波峰还是波谷，通过多个识别单元的识别就可以获取手指的指纹信息。本公开实施例的结构更加的简单轻薄，不仅能够降低成本，还可以提高用户体验。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围由所附的权利要求确定。

Claims (20)

  1. 一种指纹识别装置，包括：
    透光基板；
    导光层，所述导光层设置于所述透光基板的一侧；
    多个识别单元，多个所述识别单元设置在所述导光层上，每个所述识别单元包括第一光栅模块、第二光栅模块和检测模块；其中，
    所述第一光栅模块设置于所述导光层和所述透光基板之间，并且被配置为将入射角为预设角度范围内的指纹光线衍射耦合至所述导光层内传输；
    所述第二光栅模块设置于所述导光层的一侧，所述检测模块设置于所述第二光栅模块背离于所述导光层的一侧，所述第二光栅模块被配置为将所述导光层内的所述指纹光线取出至所述检测模块上，
    所述检测模块被配置为检测被所述第二光栅模块从所述导光层内取出的所述指纹光线的光线强度。
  2. 根据权利要求1所述的指纹识别装置，其中，所述第一光栅模块和所述第二光栅模块都与所述导光层直接接触。
  3. 根据权利要求1或2所述的指纹识别装置，其中，
    所述第一光栅模块和所述第二光栅模块相邻设置于所述导光层的同一侧。
  4. 根据权利要求3所述的指纹识别装置，其中，所述检测模块被配置为只检测从所述导光层射出的指纹光线。
  5. 根据权利要求4所述的指纹识别装置，其中，所述检测模块包括感光层和遮光层，所述感光层位于所述遮光层和所述导光层之间，并且所述遮光层遮挡所述感光层。
  6. 根据权利要求1或2所述的指纹识别装置，其中，
    所述第二光栅模块设置于所述导光层背离于所述第一光栅模块的一侧。
  7. 根据权利要求1-6中任一项所述的指纹识别装置，其中，所述第二光栅模块和所述检测模块在所述导光层上的正投影交叠。
  8. 根据权利要求1-7中任一项所述的指纹识别装置，其中，
    所述指纹光线入射角的所述预设角度范围为-7度至+4度。
  9. 根据权利要求1-8中任一项所述的指纹识别装置，其中，
    每个所述第一光栅模块包括多个并排设置的入光光栅条，每个所述入光光栅条被配置为将对应位置的指纹光线衍射耦合至所述导光层内，并使所述指纹光线在所述导光层内传输；
    每个所述第二光栅模块包括多个并排设置的出光光栅条，每个所述出光光栅条被配置为将所述导光层内的指纹光线取出至所述检测模块，以使所述检测模块检测所述指纹光线的光线强度。
  10. 根据权利要求9所述的指纹识别装置，其中，
    每个所述入光光栅条和每个所述出光光栅条均为倾斜的光栅条。
  11. 根据权利要求10所述的指纹识别装置，其中，每个所述入光光栅条和每个所述出光光栅条的相对于与所述导光层相垂直的法线的夹角为10°-30°，且每个所述入光光栅条和每个所述出光光栅条的高度为400纳米-500纳米。
  12. 根据权利要求1至11中任一项所述的指纹识别装置，其中，所述透光基板为OLED显示基板。
  13. 根据权利要求12所述的指纹识别装置，其中，
    所述OLED显示基板包括透光衬底层和发光层，所述发光层设置于多个所述第一光栅模块背离于所述导光层的一侧，所述透光衬底层设置于所述发光层背离于所述导光层的一侧。
  14. 根据权利要求1-11中任一项所述的指纹识别装置，其中，所述透光基板为主动发光基板。
  15. 根据权利要求14所述的指纹识别装置，其中，所述导光层位于所述主动发光基板的背侧。
  16. 根据权利要求1-15中任一项所述的指纹识别装置，其中，被所述第一光栅模块导入所述导光层内的所述指纹光线被所述导光层的远离所述第一光栅模块的表面全反射至所述第二光栅模块。
  17. 根据权利要求1-16中任一项所述的指纹识别装置，其中，所述导光层的厚度小于或等于50微米。
  18. 根据权利要求1-17中任一项所述的指纹识别装置，其中，在所述多个识别单元的排列方向上，每个识别单元的宽度小于指纹的一个指纹谷和一 个指纹脊的宽度之和。
  19. 一种识别装置，包括：
    透光基板；
    导光层，所述导光层设置于所述透光基板的一侧；
    多个识别单元，多个所述识别单元设置在所述导光层上，每个所述识别单元包括第一光栅模块、第二光栅模块和检测模块；其中，
    所述第一光栅模块设置于所述导光层和所述透光基板之间，并且被配置为将透过所述透光基板且入射角为预设角度范围内的光线衍射耦合至所述导光层内传输；
    所述第二光栅模块设置于所述导光层的一侧，所述检测模块设置于所述第二光栅模块背离于所述导光层的一侧，所述第二光栅模块被配置为将所述导光层内的所述光线取出至所述检测模块上，
    所述检测模块被配置为检测被所述第二光栅模块从所述导光层内取出的所述光线的光线强度。
  20. 一种显示设备，包括：如权利要求1至18中任一项所述的指纹识别装置或权利要求19所述的识别装置。
PCT/CN2019/081308 2018-04-11 2019-04-03 指纹识别装置、识别装置和显示设备 WO2019196724A1 (zh)

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