WO2020151250A1 - 柔性准直器及其制备方法、指纹识别模组以及电子设备 - Google Patents

柔性准直器及其制备方法、指纹识别模组以及电子设备 Download PDF

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Publication number
WO2020151250A1
WO2020151250A1 PCT/CN2019/108394 CN2019108394W WO2020151250A1 WO 2020151250 A1 WO2020151250 A1 WO 2020151250A1 CN 2019108394 W CN2019108394 W CN 2019108394W WO 2020151250 A1 WO2020151250 A1 WO 2020151250A1
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Prior art keywords
flexible
light
collimating
substrate
collimator
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PCT/CN2019/108394
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English (en)
French (fr)
Inventor
刘泉
黄鑫源
安宏鹏
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南昌欧菲生物识别技术有限公司
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Publication of WO2020151250A1 publication Critical patent/WO2020151250A1/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
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • the invention relates to the technical field of fingerprint identification, in particular to a flexible collimator and a preparation method thereof, a fingerprint identification module and an electronic device.
  • Optical fingerprint recognition modules have been widely used in terminal products such as mobile phones.
  • full-screen fingerprint recognition has become a development direction.
  • the optical fingerprint recognition module usually includes a fingerprint sensor and a collimator arranged on the fingerprint sensor.
  • the fingerprint recognition module cannot be completely attached to the curved screen or the folding screen. Therefore, full-screen fingerprint recognition cannot be realized in a true sense.
  • a flexible collimator and a manufacturing method thereof, a fingerprint identification module and an electronic device are provided.
  • a flexible collimator includes: a substrate, the substrate is a flexible substrate; a collimating column, the number of the collimating columns is multiple, and the collimating columns are arranged on the substrate at intervals, and the collimating columns are used for Adjusting the light passing through the flexible collimator to a light having a predetermined angle with the collimated light; and a light shielding layer, which is filled between the collimating posts, and the light shielding layer is used to prevent the light from passing through .
  • a flexible collimator includes: a patterned collimating layer, the collimating layer is patterned to form collimating columns spaced from each other; and a light shielding layer filled between the collimating columns.
  • a method for preparing a collimator includes: arranging transparent glue on a flexible substrate; patterning the transparent glue, and curing the patterned transparent glue to form a plurality of collimating columns spaced apart from each other.
  • the straight post is used to adjust the light passing through the flexible collimator to the light that is at a predetermined angle with the collimated light; a light-shielding layer is provided on the cured transparent glue so that the light-shielding layer is filled in each Between the collimating columns, the light shielding layer is used to prevent light from passing through.
  • a fingerprint identification module comprising: an optical sensor; wherein the optical sensor is a flexible optical sensor or a rigid optical sensor; a flexible collimator is provided on the optical sensor; wherein the The flexible collimator is as described above.
  • An electronic device comprising: a display screen; a fingerprint identification module attached to the display screen; wherein the fingerprint identification module is as described above.
  • FIG. 1 is a schematic structural diagram of a fingerprint identification module provided by an embodiment of the present invention
  • Fig. 2 is a schematic structural diagram of a collimator provided by an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the structure of the A region of the collimator provided by an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the assembly of a fingerprint recognition module and a display screen provided by an embodiment of the present invention
  • FIG. 5 is a schematic flow chart of a method for preparing a collimator provided by an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a specific flow of step S3 of a method for preparing a collimator according to an embodiment of the present invention.
  • the fingerprint identification module 100 includes: an optical sensor 1, a flexible collimator 2, and a fingerprint chip 3.
  • the flexible collimator 2 is arranged on the optical sensor 1, and is used to make the visible light transmitted to the optical sensor 1 collimated light or approximately collimated light (the angle value between these approximately collimated light and the collimated light is 5° Within) to ensure the recognition effect of the sensor.
  • the fingerprint chip 3 is used to process electrical signals generated by the optical sensor 1, and the fingerprint chip 3 is connected to the optical sensor 1 through a flexible circuit board 4.
  • the optical sensor 1 is also a flexible sensor, so that the entire fingerprint recognition module 100 is a flexible fingerprint recognition module, so that it can be completely attached to a curved screen or a folding screen, etc., thereby achieving a curved screen and folding Full screen fingerprint recognition of the screen.
  • the flexible collimator 2 includes: a substrate 21, a collimating column 22 and a light shielding layer 23. It can be understood that, in this embodiment, in order to make the collimator a flexible collimator, the substrate 21 is a flexible substrate.
  • the substrate 21 has a first surface and a second surface arranged opposite to each other.
  • collimating pillars 22 which are arranged on the first surface (it should be understood that the collimating pillars 22 are arranged separately from each other), and the light shielding layer 23 is filled Between the collimating posts 22, it is used to prevent light from passing through (mainly to prevent visible light from passing through), so as to ensure that the light incident from the first surface side of the substrate 21 can only be transmitted to the second side of the substrate 21 through the collimating posts 22 Two surfaces, so that the flexible collimator 2 can filter the light that has a predetermined included angle with the collimated light through the collimating column 22 (in this embodiment, the predetermined included angle is less than or equal to 5°).
  • the collimator is a flexible collimator, it can be combined with a flexible optical sensor to form a flexible fingerprint recognition module, so that the fingerprint recognition module can be fully attached to the curved screen or the folding screen to realize the curved screen And full-screen fingerprint recognition of the folding screen.
  • the collimating columns 22 there are intervals between the collimating columns 22, so that when the flexible collimator 2 is bent and deformed, the force between the collimating columns 22 to resist the deformation is smaller, which is more conducive to the bending and deformation of the flexible collimator 2, thereby improving Conducive to bending deformation of the fingerprint recognition module.
  • a transparent substrate with a visible light transmittance greater than or equal to 90 is used in this embodiment, such as a PET board (PET is the abbreviation of Polyethylene terephthalate, and the Chinese name is polyethylene terephthalate) , PC board (PC is the abbreviation of Polycarbonate, the Chinese name is polycarbonate), etc.
  • PET board is the abbreviation of Polyethylene terephthalate
  • PC board PC is the abbreviation of Polycarbonate
  • the Chinese name is polycarbonate
  • the end faces of the collimating columns 22 away from the substrate 21 are located on the same plane.
  • the specifications of the collimating columns 22 are consistent; optionally, the specifications refer to relevant parameters such as shape, structural size, and material.
  • the collimating columns 22 are evenly arranged on the first surface of the substrate 21 to further improve the performance of the flexible collimator 2.
  • each collimating column 22 is perpendicular to the first surface of the substrate 21, and in this embodiment, each collimating column 22 is a cylinder.
  • the collimating column 22 may also be a prism or the like.
  • the ratio between the height of the collimating column 22 and the maximum width is greater than or equal to 11.5, for example, when the collimating column 22 is a cylinder
  • the ratio between the axial length of the collimating column 22 and the cross-sectional diameter should be greater than or equal to 11.5, so as to ensure that the angle between the light passing through the collimating column 22 and the collimated light is within 5°.
  • the light shielding layer 23 may be black ink or the like to prevent visible light from passing through.
  • the light shielding layer 23 covers the sidewalls of the collimating column 22 and the area on the first surface of the substrate 21 that is not in contact with the collimating column 22.
  • the black ink is directly filled between the collimating columns 22 by printing.
  • the light-shielding layer 23 may also be other arrangements that can prevent visible light from passing through.
  • the light-shielding layer 23 may be a plating layer that prevents light from passing through.
  • the flexible collimator 2 further includes a filter layer 24.
  • the filter layer 24 is provided on the second surface of the substrate 21 for filtering ultraviolet light and infrared light. Avoid ultraviolet light and infrared light passing through the flexible collimator 2 to interfere with the recognition of the optical sensor 1.
  • the filter layer 24 is a coating layer provided on the second surface of the substrate 21 by vacuum coating, and the material can be a SiO2+Nb2O5 coating or a SiO2+titanium oxide coating.
  • the filter layer 24 may also be provided on the end surface of the collimating column 22 far away from the substrate 21, or the filter layer 24 may also be provided on the first surface of the substrate 21.
  • the collimating column 22 is provided on the filter layer.
  • the filter layer 24 may also be a combination of an ultraviolet light blocking layer and an infrared light blocking layer.
  • the filter layer 24 is composed of an ultraviolet light blocking film and an infrared light blocking film.
  • an ultraviolet light barrier film may be attached to the second surface of the substrate 21 first, and then an infrared light barrier film may be attached to the ultraviolet light barrier film.
  • the filter layer 24 can also be composed of a combination of an ultraviolet light blocking layer and an infrared light blocking layer
  • the two can also be provided separately, wherein the two are respectively provided on the end surface of the collimating column 22 away from the substrate 21, and On any two of the first surface and the second surface of the substrate 21.
  • the flexible collimator in the embodiment of the present application can be used for collimating visible light, or light with other set frequency ranges, such as projected laser or infrared light in 3D imaging. And so on, the corresponding filter layer needs to be correspondingly set to only transmit light in the set frequency range, and the remaining structure and principle are the same as the above-mentioned embodiment, and the description will not be repeated in this embodiment.
  • the flexible collimator 2 further includes an adhesive layer 25.
  • the adhesive layer 25 is provided between the collimating column 22 and the substrate 21 to improve the alignment between the collimating column 22 and the substrate 21. The bonding strength between the substrates 21.
  • the adhesive layer 25 is integrally formed with each collimating column.
  • the present invention also provides an electronic device.
  • the electronic device includes a display screen 200 and a fingerprint identification module attached to the display screen 200, wherein the fingerprint identification module is any one of the above implementations.
  • the display screen 200 may be a curved screen or a folding screen.
  • the fingerprint identification module 100 is a flexible fingerprint identification module, it can be completely attached to the curved screen or the folding screen. Realize full-screen fingerprint recognition in the sense.
  • the electronic device may be a terminal product such as a smart phone or a tablet computer.
  • the present invention also provides a method for preparing the collimator, which can make the production of the collimator more convenient. Specifically, the method includes the following steps.
  • Step S1 coating transparent glue on the first surface of the flexible substrate.
  • the flexible substrate is a transparent substrate.
  • the substrate adopts a transparent substrate with a visible light transmittance greater than or equal to 90% to ensure the transmittance of visible light.
  • the transparent substrate may be a flexible substrate such as a PET board and a PC board.
  • Step S2 Pattern the transparent glue, and solidify the patterned transparent glue to form a plurality of collimating columns spaced apart from each other, and the collimating columns are used to adjust the light transmitted through the flexible collimator It is a light ray at a predetermined angle to the collimated light.
  • the step of patterning the transparent glue is specifically: using a mold to imprint the transparent glue and curing the transparent glue imprinted by the mold, wherein the mold is provided with a concave structure corresponding to the collimating column to be produced. After the mold is imprinted on the transparent glue, the transparent glue will be squeezed and filled into the concave structure on the mold. At this time, the transparent glue will solidify to obtain the collimating column. It can be understood that, in order to avoid deformation of the collimating column, in this embodiment, the mold is not removed until the transparent glue is completely cured.
  • the transparent glue is UV glue (ie, ultraviolet curing glue). After the mold is imprinted on the transparent glue, ultraviolet light is used to cure the transparent glue.
  • the abrasive tool in this embodiment can be made of acrylic or other materials that can transmit ultraviolet light.
  • the transparent glue can also be other glues, such as thermosetting glue, in which case the glue can be cured by heating to obtain the collimating column.
  • Step S3 A light-shielding layer is provided on the cured transparent glue, and the light-shielding layer is filled between the collimating columns.
  • the light-shielding layer covers the sidewalls of the collimating column and the area of the first surface of the substrate that does not correspond to the collimating column.
  • the mold In actual production, it is difficult for the mold to completely squeeze out the glue corresponding to the area outside the concave structure, that is, there is a certain amount of transparent glue between the mold and the first surface of the substrate, and the collimating columns pass through these after curing.
  • the remaining cured transparent glue (the cured glue is the adhesive layer described in the above embodiment) is connected.
  • the light-shielding layer actually covers the adhesive layer.
  • the setting of the light shielding layer mainly includes step S31, printing ink on the cured transparent glue, and the ink covers the cured transparent glue; step S32 , Curing the ink; step S33, removing the ink on the end surface of the collimating column away from the transparent substrate.
  • the ink is a black ink, and the curing of the ink is achieved by baking.
  • a laser etching method is used to remove the ink on the end surface of the collimating column away from the flexible substrate.
  • a chemical etching method may also be used to remove the ink in the corresponding area on the collimating column.
  • the light-shielding layer can also be arranged in other ways, such as vacuum coating.
  • the preparation method of the collimator further includes the step of providing a filter layer.
  • the preparation method of the collimator further includes: step S4, after setting a light shielding layer on the cured transparent glue, it further includes: on the second surface of the flexible substrate A filter layer is provided to prevent ultraviolet light and infrared light from passing through the collimator, wherein the first surface of the flexible substrate is opposite to the second surface of the flexible substrate.
  • the filter layer is a coating layer disposed on the second surface of the flexible substrate by vacuum coating, such as SiO2+Nb2O5 composite coating or SiO2+titanium oxide conforming coating.
  • the filter layer may also be set before step S1, or after step S2 and before step S3.
  • the arrangement of the filter layer can also be done in other ways. For example, when the filter layer is a thin film, it can be produced by sticking a film.
  • the filter layer may also be disposed on the end surface of the collimating column far away from the flexible substrate, or the filter layer may also be disposed on the first surface of the flexible substrate. On the filter layer.
  • the filter layer may also be a combination of an ultraviolet light blocking layer and an infrared light blocking layer.
  • the ultraviolet light blocking layer and the infrared light blocking layer may also be provided separately, wherein, The two are respectively arranged on the end surface of the collimating column away from the base flexible substrate and any two of the first surface and the second surface of the flexible substrate.
  • the above-mentioned transparent substrate may also be a release film, that is, the collimating column 22 and the light shielding layer 23 are arranged on the release film after the flexible collimator is manufactured.
  • the release film can be removed and only the collimating column and the light-shielding layer remain.

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Abstract

一种柔性准直器(2)，包括：基板(21)，所述基板(21)为柔性基板；准直柱(22)，所述准直柱(22)的个数为多个，且相互间隔设置在所述基板(21)上，所述准直柱(22)用于将透过所述柔性准直器(2)的光线调整为与准直光线呈预定夹角的光线；遮光层(23)，填充在各所述准直柱(22)之间，所述遮光层(23)用于防止光线穿过。

Description

柔性准直器及其制备方法、指纹识别模组以及电子设备 技术领域
本发明涉及指纹识别技术领域，特别是涉及一种柔性准直器及其制备方法、指纹识别模组以及电子设备。
背景技术
光学指纹识别模组已经广泛应用于手机等终端产品，为了提高用户的使用体验，全屏指纹识别成为一个发展方向。光学指纹识别模组通常包括指纹传感器以及设置在指纹传感器上的准直器，然而传统的准直器在应用于指纹识别模组后，会导致指纹识别模组无法与曲面屏或折叠屏完全贴合，从而无法真正意义上实现全屏指纹识别。
发明内容
根据本申请的各种实施例，提供一种柔性准直器及其制备方法、指纹识别模组以及电子设备。
一种柔性准直器，包括：基板，所述基板为柔性基板；准直柱，所述准直柱的个数为多个，且相互间隔设置在所述基板上，所述准直柱用于将透过所述柔性准直器的光线调整为与准直光线呈预定夹角的光线；及遮光层，填充在各所述准直柱之间，所述遮光层用于防止光线穿过。
一种柔性准直器，包括：图案化的准直层，所述准直层因图案化而形成互相间隔的准直柱；及遮光层，填充在所述准直柱之间。
一种准直器的制备方法，包括：在柔性基板上设置透明胶水；图案化所述透明胶水，并固化图案化的所述透明胶水以形成多个相互间隔设置的准直柱，所述准直柱用于将透过所述柔性准直器的光线调整为与准直光线呈预定夹角的光线；在固化后的所述透明胶水上设置遮光层，使所述遮光层填充在 各所述准直柱之间，所述遮光层用于防止光线穿过。
一种指纹识别模组，所述指纹识别模组包括：光学传感器；其中，所述光学传感器为柔性光学传感器或刚性光学传感器；柔性准直器，设于所述光学传感器上；其中，所述柔性准直器如上任意一项所述。
一种电子设备，所述电子设备包括：显示屏；指纹识别模组，贴设于所述显示屏上；其中,所述指纹识别模组如上所述。
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本发明一实施例提供的指纹识别模组的结构示意图；
图2为本发明一实施例提供的准直器的结构示意图；
图3为本发明一实施例提供的准直器A区域的结构示意图；
图4为本发明一实施例提供的指纹识别模组与显示屏装配的示意图；
图5为本发明一实施例提供的准直器制备方法的流程示意图；
图6为本发明一实施例提供的准直器制备方法的步骤S3的具体流程示意图。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似改进， 因此本发明不受下面公开的具体实施的限制。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体地实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1所示，为本发明实施例提供的一种指纹识别模组100，该指纹识别模组100包括：光学传感器1、柔性准直器2，以及指纹芯片3。柔性准直器2设置在光学传感器1上，用于使传递至光学传感器1的可见光为准直光或近似为准直光(这些近似准直光与准直光之间的角度值在5°之内)以保证传感器的识别效果。指纹芯片3用于处理光学传感器1所产生的电信号，指纹芯片3通过柔性电路板4与光学传感器1相接。另外，在本实施例中，光学传感器1也为柔性传感器，使得整个指纹识别模组100为柔性指纹识别模组，从而可以与曲面屏或者折叠屏等完全贴合，进而可以实现曲面屏和折叠屏的全屏指纹识别。
如图2和图3所示，本发明提供的实施例中，柔性准直器2包括：基板21、准直柱22以及遮光层23。可以理解的，在本实施例中，为了使准直器为柔性准直器，基板21为柔性基板。基板21具有相背设置的第一表面与第二表面，准直柱22的个数为多个，设置在第一表面(应当理解的，各准直柱22相互隔离设置)，遮光层23填充在各准直柱22之间，用于防止光线穿过(主要是防止可见光穿过)，以保证从基板21第一表面一侧入射的光线只能通过准直柱22传递至基板21的第二表面，进而使柔性准直器2能够通过准直柱22筛选与准直光呈预定夹角的光线(在本实施例中，这个预定夹角角度值小于等于5°)。在本实施例中，由于准直器为柔性准直器，从而可以与柔 性光学传感器组成柔性指纹识别模组，以便使指纹识别模组可以与曲面屏或折叠屏实现完全贴合，实现曲面屏和折叠屏的全屏指纹识别。同时在本实施例中，准直柱22之间有间隔，使得柔性准直器2弯曲形变时准直柱22之间抵抗形变的力较小，更利于柔性准直器2弯曲形变，从而更利于指纹识别模组弯曲形变。
为了提高基板21的透光性能，在本实施例中采用可见光透光率大于等于90的透明基板，比如PET板(PET为Polyethylene terephthalate的缩写，中文名称为聚对苯二甲酸乙二醇酯)、PC板(PC为Polycarbonate的缩写，中文名称为聚碳酸酯)等。
为了使柔性准直器2的使用更加方便，在本实施例中，各准直柱22远离基板21的端面位于同一平面上。另外，在本实施例中，为了生产方便，各准直柱22的规格一致；可选的，所述规格指形状、结构尺寸、材料等相关参数。此外，在本实施例中，各准直柱22均匀排布在基板21的第一表面上，以进一步提高柔性准直器2的性能。
应该理解的，各准直柱22的轴线均垂直于基板21的第一表面，在本实施例中，各准直柱22均为圆柱体。当然，在本发明提供的其他实施例中，准直柱22也可以是棱柱等。
在本实施例中，为了保证从柔性准直器2穿过的光线的准直度，准直柱22的高度与最大宽度之间的比值大于等于11.5，比如当准直柱22为圆柱体时，准直柱22的轴向长度与横截面直径之间的比值应该大于等于11.5，从而保证通过准直柱22的光学与准直光之间的角度值在5°之内。
在本实施例中，遮光层23可以是黑色油墨等，用于防止可见光穿过。另外，遮光层23覆盖准直柱22的侧壁以及基板21第一表面上不与准直柱22接触的区域。为了生产方便，在本实施例中，黑色油墨通过印刷的方式直接填充在各准直柱22之间。可以理解的，在本发明提供的其他实施例中，遮光层23也可以是其他能够防止可见光穿过的设置，比如，遮光层23可以是阻止可将光透过的镀层等。
如图3所示，在本发明提供的实施例中，柔性准直器2还包括滤光层24，滤光层24设于基板21的第二表面，用于过滤紫外光和红外光，以避免紫外光和红外光透过柔性准直器2对光学传感器1的识别造成干扰。在本实施例中，滤光层24为采用真空镀膜方式设置在基板21第二表面的镀层，材料可以是SiO2+Nb2O5镀层或者SiO2+钛氧化物镀层等。当然，在本发明提供的其他实施例中，滤光层24也可以是设置在准直柱22远离基板21一端的端面上，或者滤光层24也可以是设置在基板21的第一表面，准直柱22设在滤光层上。
在本发明提供的其他实施例中，滤光层24也可以是由紫外光阻隔层和红外光阻隔层组合而成，比如，滤光层24由紫外光阻隔薄膜和红外光阻隔薄膜等组成，生产时可以是先在基板21的第二表面贴设紫外光阻隔膜，再在紫外光阻隔膜上贴设红外光阻隔膜。
另外，当滤光层24也可以是由紫外光阻隔层和红外光阻隔层组合而成时，二者也可以分开设置，其中，二者分别设置在准直柱22远离基板21的端面，以及基板21的第一表面和第二表面三者的任意两者上。
需要说明的是，本申请实施例中的柔性准直器既可以是用于对可见光进行准直操作，也可以是其他设定频率范围的光线，例如用于3D成像中的投射激光或者红外光等等，相应的滤光层则需要对应设置为仅透过所设定频率范围的光线，其余结构及原理与上述实施例相同，本实施例不在重复描述。
如图3所示，在本发明提供的实施例中，柔性准直器2还包括粘结层25，粘结层25设于准直柱22与基板21之间，可以提高准直柱22与基板21之间的黏接强度。另外，在本实施例中，粘结层25与各准直柱一体成型。
可以理解的，上述各实施例中，除了遮光层23的可见光透过率低之外，其他如基板21、准直柱22、过滤层24、粘结层25等均使用可见光透过率尽可能高的材料制成。
本发明还提供了一种电子设备，如图4所示，该电子设备包括显示屏200，以及贴设在显示屏200上的指纹识别模组，其中，该指纹识别模组为上述任一实施例所述的指纹识别模组100。另外，在本实施例中，显示屏200可以 为曲面屏或者折叠屏，此时，由于指纹识别模组100为柔性指纹识别模组，从而可以与该曲面屏或折叠屏完全贴合，在真正意义上实现全屏指纹识别。在本实施例中，电子设备可以是智能手机、平板电脑等终端产品。
如图5所示，本发明还提供了一种准直器的制备方法，该方法可以使得准直器的生产更加方便，具体的，该方法包括以下步骤。
步骤S1：在柔性基板的第一表面上涂布透明胶水。
在本实施例中，柔性基板为透明基板，具体的，基板采用可见光透光率大于等于90％的透明基板，以保证可见光的透过性。其中，透明基板可以是PET板、PC板等柔性基板。
步骤S2：图案化所述透明胶水，并固化图案化的所述透明胶水以形成多个相互间隔设置的准直柱，所述准直柱用于将透过所述柔性准直器的光线调整为与准直光线呈预定角度的光线。
在本实施例中，图案化透明胶水的步骤具体为：利用模具压印透明胶水，并固化被模具压印的透明胶水，其中，模具设有与待生产准直柱相对应的内凹结构。模具压印在透明胶水上以后透明胶水会受到挤压力而填充在模具上的内凹结构内，此时透明胶水固化便可以得到准直柱。可以理解的，为了避免准直柱发生变形，在本实施例中，待透明胶水完全固化以后才移走模具。
在本实施例中，透明胶水为UV胶水(即紫外光固化胶水)，模具在透明胶水上压印好以后，利用紫外光照射使透明胶水固化。为了使紫外光更容易照射到UV胶水，在本实施例中磨具可以采用亚克力等可使紫外线透过的材料制成。
可以理解的，在本发明提供的其他实施例中，透明胶水也可以采用其他胶水，比如热固性胶水，此时可以采用加热的方式使胶水固化以得到准直柱。
步骤S3：在固化后的所述透明胶水上设置遮光层，所述遮光层填充在各所述准直柱之间。
在本实施例中，遮光层覆盖准直柱的侧壁，以及基板第一表面不与准直柱相对应的区域。在实际生产中，模具很难将内凹结构之外区域所对应的胶 水完全挤出，即模具与基板的第一表面之间留有一定的透明胶水，固化后各准直柱之间通过这些残存的已被固化的透明胶水(这些固化的胶水即为上述实施例所述的粘结层)相接，在本实施例中，遮光层实际上是覆盖在粘结层上。
具体的，如图6所示，在本实施例中，遮光层的设置主要包括步骤S31，在固化后的所述透明胶水上印刷油墨，所述油墨覆盖固化后的所述透明胶水；步骤S32，固化所述油墨；步骤S33，去除所述准直柱远离所述透明基板的端面上的油墨。其中，在本实施例中，油墨为黑色油墨，油墨的固化采用烘烤的方式实现。此外，在本实施例中，为了生存方便，采用激光蚀刻的方式去除与准直柱远离柔性基板的端面上的油墨。可以理解的，在本发明提供的其他实施例中，也可以采用化学蚀刻的方式去除准直柱上相应区域的油墨。当然，在本发明提供的其他实施例中，遮光层的设置也可以采用其他方式，比如真空镀膜的方式等。
如图5所示，在本发明提供的实施例中，准直器的制备方法还包括设置滤光层的步骤。具体的，在本实施例中，准直器的制备方法中还包：步骤S4，在所述在固化后的所述透明胶水上设置遮光层后还包括，在所述柔性基板的第二表面设置滤光层，以避免紫外光和红外光透过所述准直器，其中，所述柔性基板第一表面与所述柔性基板第二表面相背设置。在本实施例中，滤光层为采用真空镀膜方式设置在柔性基板第二表面的镀层，比如SiO2+Nb2O5复合镀层或者SiO2+钛氧化物符合镀层等。
可以理解的，在本发明提供的其他实施例中，滤光层的设置还可以是在步骤S1之前，或者是在步骤S2之后步骤S3之前设置。滤光层的设置也可以是通过其他方式，比如滤光层为薄膜时，可以采用贴膜的方式生产。
另外，在本发明提供的其他实施例中，滤光层也可以是设置在准直柱远离柔性基板一端的端面上，或者滤光层也可以是设置在柔性基板的第一表面准直柱设在滤光层上。
此外，在本发明提供的其他实施例中，滤光层也可以是由紫外光阻隔层 和红外光阻隔层组合而成，此时紫外光阻隔层和红外光阻隔层也可以分开设置，其中，二者分别设置在准直柱远离基柔性基板的端面，以及柔性基板的第一表面和第二表面三者的任意两者上。
另外，在一些实施例中，上述的透明基板也可以是离型膜，即柔性准直器制成后准直柱22以及遮光层23设置在离型膜上。使用时，可以将离型膜去掉只保留准直柱和遮光层。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (23)

  1. 一种柔性准直器，包括：
    基板，所述基板为柔性基板；
    准直柱，所述准直柱的个数为多个，且相互间隔设置在所述基板上，所述准直柱用于将透过所述柔性准直器的光线调整为与准直光线呈预定夹角的光线；及
    遮光层，填充在各所述准直柱之间，所述遮光层用于防止光线穿过。
  2. 根据权利要求1所述的柔性准直器，其特征在于，所述基板为可见光透过率大于等于90％的基板。
  3. 根据权利要求1所述的柔性准直器，其特征在于，所述准直柱的高度与最大宽度的比值大于等于11.5。
  4. 根据权利要求1所述的柔性准直器，其特征在于，各所述准直柱的规格一致。
  5. 根据权利要求1所述的柔性准直器，其特征在于，所述遮光层为填充在各所述准直柱之间的油墨。
  6. 根据权利要求1所述的柔性准直器，其特征在于，所述准直器还包括粘结层，所述粘结层设于所述准直柱与所述基板之间；所述准直器与所述粘结层一体成型。
  7. 根据权利要求1所述的柔性准直器，其特征在于，所述遮光层为用于防止可见光穿过的遮光层。
  8. 根据权利要求7所述的柔性准直器，其特征在于，所述准直器还包括用于防止紫外光和红外光透过的滤光层；其中，所述滤光层设于所述基板远离所述准直柱的表面，及/或所述滤光层设于所述准直柱远离所述基板的端面，及/或所述滤光层设于所述准直柱与所述基板之间。
  9. 根据权利要求1所述的柔性准直器，其特征在于，所述基板为PET板或PC板。
  10. 一种柔性准直器，包括：
    图案化的准直层，所述准直层因图案化而形成互相间隔的准直柱；及
    遮光层，填充在所述准直柱之间。
  11. 根据权利要求10所述的柔性准直器，其特征在于，所述准直柱的高度与最大宽度的比值大于等于11.5。
  12. 根据权利要求10所述的柔性准直器，其特征在于，各所述准直柱的规格一致。
  13. 根据权利要求10所述的柔性准直器，其特征在于，所述遮光层为填充在各所述准直柱之间的油墨。
  14. 根据权利要求10所述的柔性准直器，其特征在于，所述准直器还包括粘结层，所述粘结层设于所述准直柱的一端，并与所述粘结层一体成型。
  15. 一种柔性准直器的制备方法，包括：
    在柔性基板上设置透明胶水；
    图案化所述透明胶水，并固化图案化的所述透明胶水以形成多个相互间隔设置的准直柱，所述准直柱用于将透过所述柔性准直器的光线调整为与准直光线呈预定夹角的光线；
    在固化后的所述透明胶水上设置遮光层，使所述遮光层填充在各所述准直柱之间，所述遮光层用于防止光线穿过。
  16. 根据权利要求15所述的柔性准直器的制备方法，其特征在于，所述图案化所述透明胶水的步骤包括：利用模具压印所述透明胶水，并固化被所述模具压印的透明胶水，其中，所述模具设有与所述准直柱相对应的内凹结构。
  17. 根据权利要求16所述的柔性准直器的制备方法，其特征在于，所述透明胶水为紫外光固化胶水；在所述模具压印所述透明胶水后，利用紫外光照射所述紫外光固化胶水，以使所述紫外光固化胶水固化。
  18. 根据权利要求15所述的柔性准直器的制备方法，其特征在于，所述在固化后的所述透明胶水上设置遮光层的步骤，包括：在固化后的所述透明胶水上设置油墨，使所述油墨覆盖固化后的所述透明胶水；固化所述油墨； 去除所述准直柱远离所述柔性基板的端面上的油墨。
  19. 根据权利要求15所述的柔性准直器的制备方法，其特征在于，所述遮光层为用于防止可见光穿过的遮光层。
  20. 根据权利要求19所述的柔性准直器的制备方法，其特征在于，所述在柔性基板上设置透明胶水之前，还包括在所述柔性基板上设置滤光层，其中，所述透明胶水设置在所述滤光层上，所述遮光层用于防止紫外光和红外光透过；及/或
    所述固化图案化的所述透明胶水以形成多个相互间隔设置的准直柱后，还包括在所述准直柱远离所述柔性基板的端面设置滤光层，所述遮光层用于防止紫外光和红外光透过。
  21. 根据权利要求19所述的柔性准直器的制备方法，其特征在于，所述在柔性基板上设置透明胶水之前，还包括在所述柔性基板上设置滤光层，其中，所述透明胶水设置在所述柔性基板远离所述滤光层的表面上；及/或
    所述固化图案化的所述透明胶水以形成多个相互间隔设置的准直柱后，还包括在所述柔性基板远离所述准直柱的表面上设置滤光层。
  22. 一种指纹识别模组，所述指纹识别模组包括：
    光学传感器；其中，所述光学传感器为柔性光学传感器或刚性光学传感器；及
    柔性准直器，设于所述光学传感器上；
    其中，所述柔性准直器如权利要求1-14任意一项所述。
  23. 一种电子设备，包括：
    显示屏；及
    指纹识别模组，贴设于所述显示屏上；
    其中,所述指纹识别模组如权利要求22所述。
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