WO2022143535A1 - 指纹模组及电子设备 - Google Patents

指纹模组及电子设备 Download PDF

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Publication number
WO2022143535A1
WO2022143535A1 PCT/CN2021/141688 CN2021141688W WO2022143535A1 WO 2022143535 A1 WO2022143535 A1 WO 2022143535A1 CN 2021141688 W CN2021141688 W CN 2021141688W WO 2022143535 A1 WO2022143535 A1 WO 2022143535A1
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WO
WIPO (PCT)
Prior art keywords
light
display module
fingerprint module
module according
support portion
Prior art date
Application number
PCT/CN2021/141688
Other languages
English (en)
French (fr)
Inventor
吴华平
Original Assignee
维沃移动通信有限公司
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 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to EP21914271.8A priority Critical patent/EP4273744A4/en
Publication of WO2022143535A1 publication Critical patent/WO2022143535A1/zh
Priority to US18/215,896 priority patent/US12125309B2/en

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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
    • G06V40/13—Sensors therefor
    • G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger

Definitions

  • the application belongs to the technical field of communication equipment, and specifically relates to a fingerprint module and an electronic device.
  • the electronic device includes a fingerprint module and a display module.
  • the fingerprint module is arranged below the display module, and the display module emits light. After the light is refracted by the user's finger, part of the light enters the fingerprint module, thereby realizing the user's fingerprint. identification.
  • a micro-lens film can be attached to the photosensitive unit of the fingerprint module, and the micro-lens film can convert scattered light into parallel light, thereby improving the optical performance of the fingerprint module.
  • the inventor found that the related art has the following problems.
  • the display module is easily deformed, which causes the display module to contact the top of the microlens film, so that the lens passing through the microlens is easily deformed.
  • the large-angle light interferes with each other and forms interference fringes, which in turn affects the fingerprint image, resulting in poor imaging quality of the fingerprint module.
  • the purpose of the embodiments of the present application is to provide a fingerprint module and an electronic device, which can solve the problem of poor imaging quality of the fingerprint module.
  • an embodiment of the present application provides a fingerprint module, which is applied to an electronic device, including a photosensitive unit, a microlens film, and a support portion;
  • the photosensitive unit and the display module of the electronic device are relatively distributed, the microlens film is arranged between the photosensitive unit and the display module, and between the microlens film and the display module There is an assembly gap, the support portion is disposed on the first surface of the microlens film facing the display module, and the first distance between the support portion and the display module is smaller than that between the microlens film and the display module. the second distance between the display modules;
  • the assembly gap has a first index of refraction
  • the display module has a second index of refraction
  • the microlens film has a third index of refraction
  • the first index of refraction is different from the second index of refraction, so The first refractive index is different from the third refractive index.
  • an electronic device in a second aspect, includes a light-transmitting cover plate, a display module, and the above-mentioned fingerprint module, wherein the light-transmitting cover plate covers the display module, and the fingerprint module is located in the display module The side facing away from the light-transmitting cover plate.
  • a support portion is provided on the first surface of the microlens film facing the display module, and the first distance between the support portion and the display module is smaller than the second distance between the microlens and the display module, That is to say, when the display module is deformed, the display module is in contact with the supporting portion, but not directly in contact with the microlens film. Therefore, after the light passes through the display module, the refractive index of the assembly gap is closely related to the display module.
  • the refractive index is different from that of the microlens film, so when the large-angle light enters the microlens film, it is prone to refraction or reflection, and the large-angle light is not easy to form interference fringes, so as to improve the imaging quality of the fingerprint module.
  • FIG. 1 is a schematic structural diagram of a first electronic device disclosed in an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of the first electronic device disclosed in the embodiment of the present application, when the display module is bent;
  • FIG. 3 is a schematic structural diagram of a second electronic device disclosed in an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a third electronic device disclosed in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a fourth electronic device disclosed in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a fifth electronic device disclosed in an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a microlens film and a support portion in the fingerprint module disclosed in the embodiment of the present application;
  • FIG. 8 is a schematic structural diagram of a fingerprint module disclosed in an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a microlens film in the fingerprint module disclosed in the embodiment of the present application.
  • FIG. 10 is a plan view of the support portion in FIGS. 5 and 6 .
  • 100-fingerprint module 110-photosensitive unit, 111-pixel area, 120-microlens film, 121-substrate, 122-concentrating protrusion, 123-light-shielding layer, 130-support, 131-first light-transmitting hole , 132-support column, 140-assembly gap, 150-fill structure, 160-filter,
  • an embodiment of the present application discloses a fingerprint module 100 , and the fingerprint module 100 is applied in an electronic device, so as to realize a fingerprint identification function of the electronic device.
  • the disclosed fingerprint module 100 includes a photosensitive unit 110 , a microlens film 120 and a support portion 130 .
  • the photosensitive unit 110 is used for receiving light signals, which can convert the light signals into image information.
  • the photosensitive units 110 are distributed relative to the display module 200 of the electronic device.
  • the microlens film 120 can have a collimating effect on the light, so that the scattered light becomes parallel light, thereby reducing the waste of light, increasing the light entering the photosensitive unit 110, and improving the working performance of the photosensitive unit 110.
  • a support portion 130 is provided on the first surface of the microlens film 120 facing the display module 200 , and the first distance between the support portion 130 and the display module 200 is less than The second distance between the microlens film 120 and the display module 200
  • the assembly gap 140 has a first index of refraction
  • the display module 200 has a second index of refraction
  • the microlens film 120 has a third index of refraction
  • the first index of refraction is different from the second index of refraction
  • the first index of refraction is different from the third index of refraction .
  • the fingerprint module 100 After the light passes through the display module 200 , passes through the microlens film 120 and then enters the photosensitive unit 110 , and passes through the photodiodes converted by the pixels in the photosensitive unit 110 to convert the optical signal into an electrical signal. , after the op amp and ADC conversion, a digital image signal is generated, and after being processed by the processor in the electronic device, a fingerprint texture image is generated.
  • the assembly gap 140 is filled with air, so the first refractive index may be the refractive index of air.
  • the first distance of the support portion 130 is zero, the support portion 130 is in contact with the display module 200.
  • the first distance of the support portion 130 is greater than zero, the display module 200 is not in contact with the support portion 130 in a state of no deformation.
  • the first index of refraction may be smaller than the second index of refraction and the third index of refraction.
  • the assembly gap 140 may also be filled with an inert gas, or the assembly gap 140 may be in a vacuum state, and the first refractive index may also be smaller than the second refractive index and the third refractive index.
  • the display module 200 when the display module 200 is deformed, the display module 200 is in contact with the support portion 130 instead of directly in contact with the microlens film 120 .
  • the refractive index of the assembly gap 140 is different from the refractive index of the display module 200 and the microlens film 120. Therefore, when the large-angle light enters the microlens film 120, refraction or reflection is likely to occur, and the large-angle light is not easy to form interference fringes. In order to improve the imaging quality of the fingerprint module 100 .
  • the support portion 130 can enhance the bending resistance of the display module 200, thereby preventing the display module 200 from being damaged due to excessive deformation.
  • the portion of the small-angle light rays passing through the support portion 130 is refracted by the support portion 130 to become parallel light, and then enters the photosensitive unit 110 .
  • Another part of the small-angle light passes through the assembly gap 140 , is refracted by the microlens film 120 and becomes parallel light, thereby entering the photosensitive unit 110 .
  • the photosensitive unit 110 After the large-angle light passes through the support portion 130, part of it is reflected and absorbed, and the other part is refracted through the microlens film 120 and then enters the photosensitive unit 110 for imaging by the photosensitive unit 110, which increases the light entering the photosensitive unit 110, thereby improving the sensitivity of the light.
  • the performance of the unit 110 After the large-angle light passes through the support portion 130, part of it is reflected and absorbed, and the other part is refracted through the microlens film 120 and then enters the photosensitive unit 110 for imaging by the photosensitive unit 110, which increases the light entering the photosensitive unit 110, thereby improving the sensitivity of the light. The performance of the unit 110.
  • one end of the support portion 130 may be disposed on the first surface, and the second end of the support portion 130 may be the first free end.
  • the first free end can be in contact with the display module 200, and at this time, the first distance is greater than zero.
  • the first distance can play a buffering role, so that the stress between the display module 200 and the fingerprint module 100 is small, so that the fingerprint module 100 and the fingerprint module 100 are less stressed.
  • the display module 200 is not easily damaged.
  • the support portion 130 and the microlens film 120 may be made of the same light-transmitting material, or the support portion 130 and the microlens film 120 may be made of different light-transmitting materials, which are not limited herein.
  • the support portion 130 may have various structures, for example, the support portion 130 may be a cylinder, a truncated cone, a polygonal cylinder or a polygonal table structure. Of course, the support portion 130 may also adopt other structures, which are not limited herein.
  • the number of the support parts 130 may be multiple, and the multiple support parts 130 may be arranged on the first surface at intervals. This solution further increases the supporting area of the supporting portion 130 , thereby further preventing the display module 200 from contacting the microlens film 120 . In addition, the supporting force for the display module 200 is further increased, thereby further improving the bending resistance of the display module 200 .
  • a plurality of support parts 130 may be distributed on the first surface in an array, and the outer surface of the support parts 130 is provided with a first filter color layer. It can be known from common knowledge that the light intensity of different wavelengths reflected by fingers and other objects is different, so through the difference of the light intensity of different wavelengths by the first filter color layer, fingers and other objects can be distinguished, thereby realizing the anti-counterfeiting detection of the optical path. , thereby improving the reliability of the electronic fingerprint module 100 .
  • the colors of the filters corresponding to the first filter color layers of two adjacent support parts 130 are different.
  • the first filter color layer can detect different wavelengths of light, thereby further improving the reliability of anti-counterfeiting detection.
  • the colors of the first filter color layer may include red, blue and green, so as to be alternately arranged according to the three primary colors.
  • other colors can also be used, which is not limited in this article.
  • the photosensitive unit 110 may have a plurality of pixel regions 111, the plurality of pixel regions 111 may be arranged at intervals, and an area corresponding to each pixel region 111 on the first surface may be provided with at least one Support part 130 .
  • the projection of the at least one support portion 130 may be located in the pixel area 111 corresponding to the support portion 130 .
  • the support portion 130 only affects the corresponding pixel area 111, so that it will not affect other pixel areas 111, thereby reducing the impact on the overall imaging of the fingerprint.
  • the projection of at least one support portion 130 coincides with the pixel area 111 corresponding to the support portion 130 .
  • the pixel region 111 and the support portion 130 have the same cross-sectional area, which is more beneficial to the design and manufacture of the photosensitive unit.
  • the N*N support portions 130 form a first sub-array, and the first sub-array corresponds to one pixel area 111 .
  • a second sub-array formed by N*N light-concentrating protrusions 122 corresponds to one pixel area 111 .
  • At least one second sub-array is disposed between two adjacent first sub-arrays.
  • the colors of the first filter color layers disposed on the support portions 130 in the same first sub-array are the same.
  • the colors of the first filter color layers disposed on the support portions 130 between two adjacent first sub-arrays may be different.
  • the first subarray may be a 2*2 array group
  • the second subarray may also be a 2*2 array group.
  • the first subarray and the second subarray may also be other array groups, such as , 3*3 array group, 4*4 array group, etc., this article does not limit.
  • a filling structure may be disposed in the assembly gap 140, the third surface of the filling structure is connected to the first surface, the fourth surface of the filling structure is connected to the display module 200, and the filling structure is the first refractive index.
  • the filling structure is filled in the assembly gap 140 , so as to support the display module 200 , thereby improving the bending resistance of the display module 200 and preventing the display module 200 from being deformed.
  • the filling structure improves the bending resistance of the display module 200, so the distance between the fingerprint module 100 and the display module 200 can be reduced, that is, the assembly gap 140 is reduced, thereby reducing the overall thickness of the electronic device. Small.
  • the support portion 130 can be embedded in the filling structure, and when the display module 200 is subjected to a large force, the filling structure is deformed. Thus, further deformation of the display module 200 is prevented.
  • the support portion 130 may be composed of a filling structure, and the refractive index of the filling structure is the first refractive index. At this time, the support portion 130 is filled in the assembly gap 140 , so that the structure of the support portion 130 is simple and the support range is large.
  • the filling structure can be made of a material with a lower refractive index.
  • the filling structure can be UV glue.
  • the UV glue is normally liquid, and will be cured after being irradiated by violet light (or ultraviolet light), so it is convenient for lamination and processing.
  • the cured UV glue has better adhesion, which can further enhance the reliability of electronic equipment.
  • the filling material can also be other organic composite materials, and the specific material of the filling structure is not limited herein.
  • the microlens film 120 may have a plurality of light-concentrating protrusions 122, and the plurality of light-concentrating protrusions 122 are distributed in an array on the first surface.
  • the condensing protrusions 122 are equivalent to convex lenses, which can further convert the scattered light into parallel light, thereby increasing the light entering the photosensitive unit 110 and further improving the working performance of the photosensitive element.
  • a plurality of light-concentrating protrusions 122 are distributed in an array on the first surface. As a result, the light-condensing protrusions 122 have a more regular distribution and a more compact structure.
  • the microlens film further includes a substrate 121 , and the light-condensing protrusions 122 are disposed on the substrate 121 .
  • the substrate 121 can be made of PET (polyethyleneterephthalate, polyethylene terephthalate) material, and of course can also be made of other materials, which is not limited herein.
  • the number of the support parts 130 may be multiple, and the multiple support parts 130 and the multiple light collecting protrusions 122 may be distributed in an array on the first surface.
  • N*N support parts 130 form a first sub-array
  • N*N light-concentrating protrusions 122 form a second sub-array
  • each first sub-array corresponds to a pixel in the display module 200
  • each The second sub-array corresponds to one pixel in the display module 200
  • N is a positive integer greater than or equal to 1.
  • the support portion 130 only affects the corresponding pixel points, so as not to affect other pixel points, thereby reducing the impact on the overall imaging of the fingerprint.
  • the support portion 130 may be provided with a plurality of first light-transmitting holes 131 , and the axes of the first light-transmitting holes 131 are perpendicular to the display module 200 and the microlens film 120 . At this time, the light enters the microlens film 120 after passing through the first light-transmitting hole 131 .
  • the sidewalls of the first light-transmitting holes 131 can absorb and block stray light, thereby reducing the interference of light between the collimating holes on the microlens film 120 .
  • the plurality of light-concentrating protrusions 122 are distributed in a one-to-one correspondence with the plurality of first light-transmitting holes 131 .
  • the light in the first light-transmitting hole 131 is reflected by the corresponding light-converging protrusions 122, thereby further reducing the interference between the light.
  • the projection of the light-concentrating protrusion 122 is located within the projection contour of the first light-transmitting hole 131, or, the projection of the light-concentrating protrusion 122 is the same as the first light-transmitting hole 131.
  • the projections of the holes 131 coincide.
  • the light-converging protrusions 122 may be located within the first light-transmitting holes 131 , thereby further reducing the interference between light rays and ensuring a good light-shielding effect.
  • the support portion 130 may be made of a black film material, so as to achieve light shielding. The material for making the support portion 130 can well absorb visible light, or absorb light in all wavelengths.
  • the first light-transmitting hole 131 is coated with an ink layer, so as to achieve light shielding.
  • the support portion 130 may be a honeycomb structure, and the connecting side wall between the two adjacent first light-transmitting holes 131 is the light-shielding portion of the first light-transmitting holes 131 . , therefore, the sidewalls between the two adjacent first light-transmitting holes 131 should be set thinner, so as to not easily affect the imaging of the fingerprint module 100 .
  • the fingerprint module 100 may further include a light shielding layer 123, the light shielding layer 123 may be disposed on the second surface of the microlens film 120 facing the photosensitive unit 110, and the light shielding layer 123 may be provided with a plurality of first Two light-transmitting holes, each second light-transmitting hole and a supporting portion 130 or a light-concentrating protrusion 122 are distributed relative to each other.
  • the light shielding layer 123 can block and absorb the large-angle light refracted by the support portion 130, thereby preventing the influence of the large-angle light on the imaging.
  • the light-shielding layer 123 may be an ink coating coated on the second surface, and certainly may be other light-shielding materials, which are not limited herein.
  • the first light-transmitting hole 131 is further provided with a support column 132, and the first end of the support column 132 is connected to the first surface , the second end of the support column 132 is the second free end.
  • the support column 132 can support the display module 200, thereby The display module 200 is prevented from contacting with the microlens film 120 , thereby improving the reliability of the fingerprint module 100 .
  • the shape of the support column 132 matches the shape of the first light-transmitting hole 131 , so that the matching performance between the first light-transmitting hole 131 and the support column 132 is improved.
  • the support column 132 may be coated with a second filter color layer, so that the optical path anti-counterfeiting detection of the fingerprint module 100 can be realized, thereby improving the reliability of the fingerprint module 100 .
  • the setting manner of the second filter color layer is the same as that of the first filter color layer, so it will not be repeated here.
  • the fingerprint module 100 may further include a filter 160 , and the filter 160 may be disposed between the photosensitive unit 110 and the microlens film 120 .
  • the filter 160 can absorb light of different wavelengths, so as to filter out the light of different wavelengths, thereby obtaining the light required for fingerprint imaging, thereby improving the reliability of fingerprint identification.
  • the embodiment of the present application further discloses an electronic device, and the disclosed electronic device includes the fingerprint module 100 described in any of the above embodiments.
  • the electronic device disclosed in the embodiments of the present application may further include a light-transmitting cover plate 300 and a display module 200 .
  • the light-transmitting cover plate 300 can cover the display module 200
  • the fingerprint module 100 is located on the display module 200 away from the light-transmitting cover plate 300 . side.
  • the display module 200 when the display module 200 is deformed, the display module 200 is in contact with the support portion 130 instead of directly in contact with the microlens film 120 .
  • the refractive index is different from the refractive index of the display module 200 and the microlens film 120. Therefore, when the large-angle light enters the microlens film 120, refraction or reflection is likely to occur, and the large-angle light is not easy to form interference fringes, so as to improve the fingerprint pattern. Group 100 reliability.
  • the light-transmitting cover plate 300 can protect the display module 200 so as to prevent the display module 200 from being damaged.
  • the light-transmitting cover plate 300 is equivalent to increasing the thickness of the display module 200 , thereby improving the rigidity of the display module 200 , thereby improving the bending resistance of the display module 200 .
  • the electronic devices disclosed in the embodiments of the present application may be devices such as smart watches, smart phones, and tablet computers, and the embodiments of the present application do not limit the specific types of electronic devices.

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Abstract

一种指纹模组（100）及电子设备，属于通信设备技术领域，所述指纹模组（100）包括感光单元（110）、微透镜膜（120）和支撑部（130）；所述感光单元（110）与所述电子设备的显示模组（200）相对分布，所述微透镜膜（120）设置于所述感光单元（110）和所述显示模组（200）之间，且所述微透镜膜（120）与所述显示模组（200）之间具有装配间隙（140），所述微透镜膜（120）朝向所述显示模组（200）的第一表面设置有所述支撑部（130），所述支撑部（130）与所述显示模组（200）之间的第一距离小于所述微透镜膜（120）与所述显示模组（200）之间的第二距离；其中，所述装配间隙（140）具有第一折射率，所述显示模组（200）具有第二折射率，所述微透镜膜（120）具有第三折射率，所述第一折射率与所述第二折射率不同，所述第一折射率与所述第三折射率不同。

Description

指纹模组及电子设备
本申请要求2020年12月31日提交在中国专利局、申请号为202011640141.1、发明名称为“指纹模组及电子设备”的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请属于通信设备技术领域，具体涉及一种指纹模组及电子设备。
背景技术
随着电子设备的快速发展，电子设备的应用越来越广泛，诸如手机、平板电脑等电子设备在人们工作、生活、娱乐等方面发挥着越来越多的作用。
相关技术中，电子设备包括指纹模组和显示模组，指纹模组设置于显示模组的下方，显示模组发出光线，光线经过用户手指折射后，部分光线进入指纹模组，从而实现用户指纹的识别。为了提高指纹模组的光学性能，指纹模组的感光单元上可以贴设微透镜膜，微透镜膜能够将分散的光线变为平行光线，从而能够提高指纹模组的光学性能。
在实现本发明创造的过程中，发明人发现相关技术存在如下问题，用户在进行指纹解锁时，显示模组容易发生变形，导致显示模组与微透镜膜的顶部接触，使得穿过微透镜的大角度光线相互干扰并形成干涉条纹，进而影响指纹图像，致使指纹模组的成像质量较差。
发明内容
本申请实施例的目的是提供一种指纹模组及电子设备，能够解决指纹模组的成像质量较差的问题。
为了解决上述技术问题，本申请是这样实现的：
第一方面，本申请实施例提供了一种指纹模组，应用于电子设备，包括感光单元、微透镜膜和支撑部；
所述感光单元与所述电子设备的显示模组相对分布，所述微透镜膜设置于所述感光单元和所述显示模组之间，且所述微透镜膜与所述显示模组之间具有装配间隙，所述微透镜膜朝向所述显示模组的第一表面设置有所述支撑部，所述支撑部与所述显示模组之间的第一距离小于所述微透镜膜与所述显示模组之间的第二距离；
其中，所述装配间隙具有第一折射率，所述显示模组具有第二折射率，所述微透镜膜具有第三折射率，所述第一折射率与所述第二折射率不同，所述第一折射率与所述第三折 射率不同。
第二方面，一种电子设备，包括透光盖板、显示模组以及上述的指纹模组，所述透光盖板覆盖所述显示模组，且所述指纹模组位于所述显示模组背离所述透光盖板的一侧。
在本申请实施例中，微透镜膜朝向显示模组的第一表面上设置有支撑部，支撑部与显示模组之间的第一距离小于微透镜与显示模组之间的第二距离，也就是说，显示模组在发生形变时，显示模组与支撑部接触，而不会直接与微透镜膜接触，因此光线在穿过显示模组后，由于装配间隙的折射率与显示模组和微透镜膜的折射率不同，因此大角度光线在进入微透镜膜时，容易发生折射或者反射现象，进而大角度光线不容易形成干涉条纹，以提高指纹模组的成像质量。
附图说明
图1是本申请实施例公开的第一种电子设备的结构示意图；
图2是本申请实施例公开的第一种电子设备中，显示模组弯曲时的结构示意图；
图3是本申请实施例公开的第二种电子设备的结构示意图；
图4是本申请实施例公开的第三种电子设备的结构示意图；
图5是本申请实施例公开的第四种电子设备的结构示意图；
图6是本申请实施例公开的第五种电子设备的结构示意图；
图7是本申请实施例公开的指纹模组中，微透镜膜和支撑部的结构示意图；
图8是本申请实施例公开的指纹模组的结构示意图；
图9是本申请实施例公开的指纹模组中，微透镜膜的结构示意图；
图10是图5和图6中的支撑部的俯视图。
附图标记说明：
100-指纹模组、110-感光单元、111-像素区、120-微透镜膜、121-基板、122-聚光凸起、123-遮光层、130-支撑部、131-第一透光孔、132-支撑柱、140-装配间隙、150-填充结构、160-滤光片、
200-显示模组、
300-透光盖板。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”，一般表示前后关联对象是一种“或”的关系。
下面结合附图，通过具体的实施例及其应用场景对本申请实施例提供的指纹模组进行详细地说明。
请参考图1～图10，本申请实施例公开一种指纹模组100，该指纹模组100应用于电子设备中，从而实现电子设备的指纹识别功能。所公开的指纹模组100包括感光单元110、微透镜膜120和支撑部130。
感光单元110用于接收光信号，其能够将光信号转化为图像信息。感光单元110与电子设备的显示模组200相对分布。微透镜膜120能够对光线具有准直作用，使得分散的光学变为平行光线，从而减小了光线的浪费，使得进入感光单元110的光线增加，从而能够提高感光单元110的工作性能。
微透镜膜120与显示模组200之间具有装配间隙140，微透镜膜120朝向显示模组200的第一表面设置有支撑部130，支撑部130与显示模组200之间的第一距离小于微透镜膜120与显示模组200之间的第二距离
装配间隙140具有第一折射率，显示模组200具有第二折射率，微透镜膜120具有第三折射率，第一折射率与第二折射率不同，第一折射率与第三折射率不同。
指纹模组100具体的工作过程中，光线透过显示模组200后，通过微透镜膜120后射入感光单元110，经过感光单元110内的像素转换的光电二极管，将光信号转换成电信号，经过运放、ADC转换后，生成数字图像信号，经过电子设备内的处理器处理后，生成指纹纹理图像。
可选地，装配间隙140内填充有空气，因此第一折射率可以为空气的折射率。当支撑 部130的第一距离为零时，支撑部130与显示模组200相接触。当支撑部130的第一距离大于零时，显示模组200在未发生形变的状态下，不与支撑部130相接触。第一折射率可以小于第二折射率和第三折射率。当然，装配间隙140内还可以填充惰性气体，或者，装配间隙140内为真空状态，同样也可以使得第一折射率可以小于第二折射率和第三折射率。
本申请公开的实施例中，显示模组200在发生形变时，显示模组200与支撑部130接触，而不会直接与微透镜膜120接触，因此光线在穿过显示模组200后，由于装配间隙140的折射率与显示模组200和微透镜膜120的折射率不同，因此大角度光线在进入微透镜膜120时，容易发生折射或者反射现象，进而大角度光线不容易形成干涉条纹，以提高指纹模组100的成像质量。
另外，支撑部130能够增强显示模组200的抗弯性能，从而防止显示模组200过渡形变而损坏。
上述实施例中，小角度光线在经过支撑部130时，经过支撑部130的这部分小角度光线被支撑部130折射，从而变为平行光，进而射入感光单元110。另一部分小角度光穿过装配间隙140，经过微透镜膜120折射后变为平行光，从而射入感光单元110。
大角度光线经过支撑部130后，部分被反射和吸收，另一部分被折射经过微透镜膜120后进入感光单元110，用于感光单元110成像，增加了进入感光单元110的光线，从而提高了感光单元110的工作性能。
在一种可选的实施例中，支撑部130的一端可以设置于第一表面，支撑部130的第二端可以为第一自由端。显示模组200处于形变状态的情况下，第一自由端可以与显示模组200相接触，此时，第一距离大于零。此方案中，显示模组200在受力弯曲时，第一距离能够起到缓冲的作用，从而使得显示模组200与指纹模组100的之间受到的应力较小，使得指纹模组100和显示模组200不容易损坏。
可选地，支撑部130可以与微透镜膜120采用同种透光材料制作，或者支撑部130可以与微透镜膜120采用不同种透光材料制作，对此本文不作限制。支撑部130可以为多种结构，例如，支撑部130可以为圆柱、圆台、多边形柱体或者多边形台状结构，当然，支撑部130还可以采用其他结构，本文对此不作限制。
在另一种可选的实施例中，支撑部130的数量可以为多个，多个支撑部130可以间隔 设置于第一表面。此方案进一步增大了支撑部130的支撑面积，从而进一步防止了显示模组200和微透镜膜120相接触。另外，也进一步增大了对显示模组200的支撑力，从而进一步提高了显示模组200的抗弯性能。
在另一种可选的实施例中，多个支撑部130可以阵列式分布于第一表面，且支撑部130的外表面设置有第一滤光颜色层。由公知常识可知，手指和其他物体反射的不同波长的光线强度不一样，因此通过第一滤光颜色层对不同波长的光强的差异，从而能够区分手指和其他物体，进而实现光路的防伪检测，进而提高电子指纹模组100的可靠性。
在另一种可选的实施例中，在多个支撑部130的第一排布方向上，相邻的两个支撑部130的第一滤光颜色层对应的滤光的颜色不同。此时，第一滤光颜色层能够对不同波长的光学进行检测，从而进一步提高了防伪检测的可靠性。
可选地，第一滤光颜色层的颜色可以包括红色、蓝色和绿色，从而按照三原色交替排布。当然还可以为其他颜色，本文不作限制。
在另一种可选的实施例中，感光单元110可以具有多个像素区111，多个像素区111可以间隔排布，第一表面上与每个像素区111对应的区域可以设置有至少一个支撑部130。在垂直于感光单元110的方向上，至少一个支撑部130的投影可以位于支撑部130对应的像素区111内。此方案中，支撑部130仅会影响与其相应的像素区111，从而不会影响其他像素区111，进而减小了对指纹整体成像的影响。
进一步地，至少一个支撑部130的投影与支撑部130对应的像素区111相重合。此方案中，像素区111与支撑部130的横截面积相同，因此更有利于感光单元的设计和制造。
如图9所示，N*N个支撑部130形成第一子阵列，第一子阵列对应一个像素区111。N*N个聚光凸起122形成的第二子阵列，第二子阵列对应一个像素区111。相邻的两个第一子阵列之间设置有至少一个第二子阵列。同一个第一子阵列内的支撑部130设置的第一滤光颜色层的颜色相同。相邻的两个第一子阵列之间的支撑部130设置的第一滤光颜色层的颜色可以不相同。可选地，第一子阵列可以为2*2的阵列组，第二子阵列也可以为2*2的阵列组，当然，第一子阵列和第二子阵列还可以为其他阵列组，如，3*3阵列组，4*4阵列组等等，本文不作限制。
在另一种可选的实施例中，装配间隙140内可以设置有填充结构，填充结构的第三表 面与第一表面相连接，填充结构的第四表面与显示模组200相连接，填充结构的折射率为第一折射率。此方案中，填充结构填充于装配间隙140，从而能够对显示模组200进行支撑，进而提高了显示模组200的抗弯性能，防止显示模组200变形。此外，填充结构填提高了显示模组200的抗弯性能，因此可以减小指纹模组100与显示模组200的距离，也就是说装配间隙140减小，从而使得电子设备的整体的厚度减小。
可选地，支撑部130可以镶嵌于填充结构之内，显示模组200受到较大的作用力时，填充结构发生形变，此时，还可以通过支撑部130对显示模组200进行辅助支撑，从而防止显示模组200进一步变形。
或者，在另一种可选的实施例中，支撑部130可以由填充结构组成，填充结构的折射率为第一折射率。此时，支撑部130填充于装配间隙140，从而使得支撑部130的结构简单，支撑范围较大。
可选地，填充结构可以采用折射率较低的材料制作，例如，填充结构可以为UV胶，UV胶常态呈现液体状，被紫光(或者紫外线)照射后，会固化，因此贴合加工方便，固化的UV胶有较好的粘合性，可以进一步加强电子设备的可靠性。当然填充材料还可以为其他有机复合材料，对于填充结构的具体材料本文不作限制。
在另一种可选的实施例中，微透镜膜120可以具有多个聚光凸起122，多个聚光凸起122在第一表面上阵列式分布。此方案中，聚光凸起122相当于凸透镜，进而能够将散射的光线变为平行光线，从而增加了进入感光单元110的光线，进一步提高了感光元件的工作性能。另外，多个聚光凸起122在第一表面上阵列式分布。从而使得聚光凸起122分布较为规整，结构较为紧凑。
可选的，微透镜膜还包括基板121，聚光凸起122设置于基板121上。基板121可以采用PET(polyethyleneterephthalate，聚对苯二甲酸乙二醇酯)材料制作，当然也可以采用其他材料制作，本文对此不作限制。
在另一种可选的实施例中，支撑部130的数量可以为多个，多个支撑部130和多个聚光凸起122可以在第一表面上阵列式分布。
其中，N*N个支撑部130形成第一子阵列，N*N个聚光凸起122形成第二子阵列，每个第一子阵列和显示模组200中的一个像素点对应，每个第二子阵列和显示模组200中的 一个像素点对应，N为大于或等于1的正整数。此方案中，支撑部130仅会影响与其相应的像素点，从而不会影响其他像素点，进而减小了对指纹整体成像的影响。
在另一种可选的实施例中，支撑部130可以开设有多个第一透光孔131，第一透光孔131的轴线垂直于显示模组200和微透镜膜120。此时，光线经过第一透光孔131后进入微透镜膜120。此方案中，第一透光孔131的侧壁能够对杂光进行吸收和阻挡，进而能够降低微透镜膜120上的各个准直孔之间的光线的干扰。
进一步地，多个聚光凸起122与多个第一透光孔131一一对应分布。此方案中，第一透光孔131内的光线经过相对应的聚光凸起122进行反射，从而进一步降低了光线之间的干扰。
可选地，在沿第一透光孔131的轴线方向上，聚光凸起122的投影位于第一透光孔131的投影轮廓之内，或者，聚光凸起122投影与第一透光孔131的投影重合。此方案中，聚光凸起122可以位于第一透光孔131之内，从而进一步降低了光线之间的干扰，确保了良好的遮光效果。可选地，支撑部130可以采用黑色薄膜材料，从而实现遮光。支撑部130的制作材料能够很好的吸收可见光，或者吸收全波段的光线。再或者，第一透光孔131内涂覆有油墨层，从而实现遮光。
在另一种可选的实施例中，支撑部130可以为蜂窝状结构，此时相邻的两个第一透光孔131之间的连接侧壁即为第一透光孔131的遮光部分，因此相邻的两个第一透光孔131之间的侧壁应该设置的较薄，从而不容易影响指纹模组100成像。
在另一种可选地实施例中，指纹模组100还可以包括遮光层123，遮光层123可以设置于微透镜膜120朝向感光单元110的第二表面，遮光层123可以开设有多个第二透光孔，每个第二透光孔和一个支撑部130或一个聚光凸起122相对分布。此方案中，遮光层123能够对支撑部130折射的大角度光线进行遮挡和吸收，从而防止大角度光线对成像的影响。可选地，遮光层123可以为涂覆在第二表面的油墨涂层，当然还可以为其他遮光材料，本文不作限制。
为了进一步提高显示模组200的抗弯性能，在另一种可选的实施例中，第一透光孔131内还设置有支撑柱132，支撑柱132的第一端与第一表面相连接，支撑柱132的第二端为第二自由端，当显示模组200受到较大的作用力时，支撑部130也发生弯曲的情况下，支撑 柱132能够对显示模组200进行支撑，从而防止显示模组200与微透镜膜120相接触，从而提高指纹模组100的可靠性。
可选的，支撑柱132的形状与第一透光孔131的形状相匹配，从而使得提高第一透光孔131与支撑柱132的配合性能。
进一步地，支撑柱132上可以涂覆有第二滤光颜色层，从而能够实现指纹模组100的光路防伪检测，进而提高指纹模组100的可靠性。第二滤光颜色层的设置方式与第一滤光颜色层相同，因此本文不再赘述。
在另一种可选的实施例中，指纹模组100还可以包括滤光片160，滤光片160可以设置于感光单元110和微透镜膜120之间。此方案中，滤光片160能够吸收不同的波长的光线，从而能够滤除不同波长的光线，进而得到指纹成像所需的光线，进而提高指纹识别的可靠性。
基于本申请实施例公开的指纹模组100，本申请实施例还公开一种电子设备，所公开的电子设备包括上文任一实施例所述的指纹模组100。本申请实施例公开的电子设备还可以包括透光盖板300和显示模组200，透光盖板300能够覆盖显示模组200，且指纹模组100位于显示模组200背离透光盖板300的一侧。此方案中，显示模组200在发生形变时，显示模组200与支撑部130接触，而不会直接与微透镜膜120接触，因此光线在穿过显示模组200后，由于装配间隙140的折射率与显示模组200和微透镜膜120的折射率不同，因此大角度光线在进入微透镜膜120时，容易发生折射或者反射现象，进而大角度光线不容易形成干涉条纹，以提高指纹模组100的可靠性。
另外，透光盖板300能够对显示模组200进行防护，从而防止显示模组200损坏。另外，透光盖板300相当于增加了显示模组200的厚度，进而提高了显示模组200的刚度，进而使得提高了显示模组200的抗弯性能。
本申请实施例公开的电子设备可以是智能手表、智能手机、平板电脑等设备，本申请实施例不限制电子设备的具体种类。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形 式，均属于本申请的保护之内。

Claims (19)

  1. 一种指纹模组，应用于电子设备，其中，包括感光单元(110)、微透镜膜(120)和支撑部(130)；
    所述感光单元(110)与所述电子设备的显示模组(200)相对分布，所述微透镜膜(120)设置于所述感光单元(110)和所述显示模组(200)之间，且所述微透镜膜(120)与所述显示模组(200)之间具有装配间隙(140)，所述微透镜膜(120)朝向所述显示模组(200)的第一表面设置有所述支撑部(130)，所述支撑部(130)与所述显示模组(200)之间的第一距离小于所述微透镜膜(120)与所述显示模组(200)之间的第二距离；
    其中，所述装配间隙(140)具有第一折射率，所述显示模组(200)具有第二折射率，所述微透镜膜(120)具有第三折射率，所述第一折射率与所述第二折射率不同，所述第一折射率与所述第三折射率不同。
  2. 根据权利要求1所述的指纹模组，其中，所述支撑部(130)的一端设置于所述第一表面，所述支撑部(130)的第二端为第一自由端，所述显示模组(200)处于形变状态的情况下，所述第一自由端与所述显示模组(200)相接触。
  3. 根据权利要求2所述的指纹模组，其中，所述支撑部(130)的数量为多个，多个所述支撑部(130)间隔设置于所述第一表面。
  4. 根据权利要求3所述的指纹模组，其中，多个所述支撑部(130)阵列式分布于所述第一表面，且所述支撑部(130)的外表面设置有第一滤光颜色层。
  5. 根据权利要求4所述的指纹模组，其中，在多个所述支撑部(130)的第一排布方向上，相邻的两个所述支撑部(130)的所述第一滤光颜色层对应的滤光的颜色不同。
  6. 根据权利要求3所述的指纹模组，其中，所述感光单元(110)具有多个像素区(111)，多个像素区(111)间隔排布，所述第一表面上与每个像素区(111)对应的区域设置有至少一个所述支撑部(130)，在垂直于所述感光单元(111)的方向上，至少一个所述支撑部(130) 的投影位于所述支撑部(130)对应的所述像素区(111)内，或者，至少一个支撑部(130)的投影与所述支撑部(130)对应的所述像素区(111)相重合。
  7. 根据权利要求1所述的指纹模组，其中，所述装配间隙(140)内设置有填充结构(150)，所述填充结构(150)的第三表面与所述第一表面相连接，所述填充结构(150)的第四表面与所述显示模组(200)相连接，所述填充结构(150)的折射率为所述第一折射率；
    或者，所述支撑部(130)由所述填充结构(150)组成，所述填充结构(150)的折射率为所述第一折射率。
  8. 根据权利要求7所述的指纹模组，其中，所述微透镜膜(120)具有多个聚光凸起(122)，所述多个聚光凸起(122)在所述第一表面上阵列式分布。
  9. 根据权利要求8所述的指纹模组，其中，所述支撑部(130)的数量为多个，多个所述支撑部(130)和所述多个聚光凸起(122)在所述第一表面上阵列式分布；
    其中，N*N个所述支撑部形成第一子阵列，N*N个所述聚光凸起(122)形成第二子阵列，每个所述第一子阵列和所述显示模组(200)中的一个像素点对应，每个所述第二子阵列和所述显示模组(200)中的一个像素点对应，N为大于或等于1的正整数。
  10. 根据权利要求8所述的指纹模组，其中，所述支撑部(130)开设有多个第一透光孔(131)，所述第一透光孔(131)的轴线垂直于所述显示模组(200)和所述微透镜膜(120)。
  11. 根据权利要求10所述的指纹模组，其中，所述支撑部(130)呈蜂窝状结构，相邻的两个所述第一透光孔(131)之间的连接侧壁为所述第一透光孔(131)的遮光部分。
  12. 根据权利要求10所述的指纹模组，其中，所述多个所述聚光凸起(122)与多个所述第一透光孔(131)一一对应分布。
  13. 根据权利要求12所述的指纹模组，其中，在沿所述第一透光孔(131)的轴线方向上，所述聚光凸起(122)的投影位于所述第一透光孔(131)的投影轮廓之内，或者， 所述聚光凸起(122)投影与所述第一透光孔(131)的投影重合。
  14. 根据权利要求8所述的指纹模组，其中，所述指纹模组(100)还包括遮光层(123)，所述遮光层(123)设置于所述微透镜膜(120)朝向所述感光单元(110)的第二表面，所述遮光层(123)开设有多个第二透光孔，每个第二透光孔和一个支撑部(130)或一个聚光凸起(122)相对分布。
  15. 根据权利要求1所述的指纹模组，其中，所述指纹模组(100)还包括滤光片(160)，所述滤光片(160)设置于所述感光单元(110)和所述微透镜膜(120)之间。
  16. 根据权利要求1所述的指纹模组，其中，所述第一透光孔(131)内设置有支撑柱(132)，所述支撑柱(132)的第一端与所述第一表面相连接，所述支撑柱(132)的第二端为第二自由端。
  17. 根据权利要求16所述的指纹模组，其中，所述支撑柱(132)的形状与所述第一透光孔(131)的形状相匹配。
  18. 根据权利要求16所述的指纹模组，其中，所述支撑柱(132)上涂覆有第二滤光颜色层。
  19. 一种电子设备，其中，包括透光盖板(300)、显示模组(200)以及权利要求1至18中任一项所述的指纹模组(100)，所述透光盖板(300)覆盖所述显示模组(200)，且所述指纹模组(100)位于所述显示模组(200)背离所述透光盖板(300)的一侧。
PCT/CN2021/141688 2020-12-31 2021-12-27 指纹模组及电子设备 WO2022143535A1 (zh)

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