CN111461057A - Under-screen biometric detection systems and electronics - Google Patents
Under-screen biometric detection systems and electronics Download PDFInfo
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Abstract
本申请提供了一种屏下生物特征检测系统和包括所述屏下生物特征检测系统的电子设备。所述屏下生物特征检测系统包括被动式发光的显示装置和生物特征检测装置。所述被动式发光的显示装置包括显示面板和背光模组。所述背光模组包括:导光板,所述导光板面对所述显示面板的一侧具有朝向所述显示面板延伸的第一聚光结构,所述导光板的上表面包括所述第一聚光结构的表面,所述第一聚光结构用于对从所述导光板内部出射到所述导光板上表面的光线进行会聚;其中,从所述导光板的下表面到所述生物特征检测装置的感光面的光路中设置有第二聚光结构,所述第二聚光结构用于对从所述导光板的下表面出射的光线进行会聚。
The present application provides an under-screen biometric detection system and an electronic device including the under-screen biometric detection system. The under-screen biometric detection system includes a passive light-emitting display device and a biometric detection device. The passive light-emitting display device includes a display panel and a backlight module. The backlight module includes: a light guide plate, the side of the light guide plate facing the display panel has a first light condensing structure extending toward the display panel, and the upper surface of the light guide plate includes the first light concentrating structure. the surface of the light structure, the first light concentrating structure is used for condensing the light emitted from the inside of the light guide plate to the upper surface of the light guide plate; wherein, from the lower surface of the light guide plate to the biometric detection A second light condensing structure is arranged in the light path of the photosensitive surface of the device, and the second light condensing structure is used for condensing the light emitted from the lower surface of the light guide plate.
Description
技术领域technical field
本申请实施例涉及检测技术领域,并且更具体地,涉及背光模组、液晶显示装置屏、生物特征检测装置、屏下生物特征检测系统、和电子设备。The embodiments of the present application relate to the field of detection technology, and more particularly, to a backlight module, a liquid crystal display device screen, a biometric detection device, an under-screen biometric detection system, and electronic equipment.
背景技术Background technique
液晶显示(LCD)屏等非自发光类显示器,包括用于提供可见光的背光模组和利用可见光实现信息显示的显示面板,基于此类显示器实现屏下的生物特征检测需要提供主动发光的光源,利用光源发射检测光束到外部对象,然后接收从外部对象返回的带有外部对象的生物特征信息的检测光束。Non-self-luminous displays such as liquid crystal display (LCD) screens, including backlight modules for providing visible light and display panels for information display using visible light, based on such displays to realize biometric detection under the screen, it is necessary to provide a light source that actively emits light, A detection beam is emitted to an external object using a light source, and then a detection beam with biometric information of the external object returned from the external object is received.
导光板是背光模组中的关键结构,导光板的上表面形成有微结构(或称V-cut结构),该微结构通常为呈锯齿形分布的棱镜结构,如图1所示,用于将入射光从边缘方向导向视向方向,并增加光的亮度以及使光均匀。The light guide plate is a key structure in the backlight module. The upper surface of the light guide plate is formed with a microstructure (or V-cut structure), which is usually a prism structure with a zigzag distribution, as shown in Figure 1. Directs the incident light from the edge direction to the viewing direction, and increases the brightness and uniformity of the light.
由于检测光束从外部对象返回后需要通过显示屏中的背光模组才能到达屏下的生物特征检测装置,因此,背光模组中的导光板上的微结构会影响生物特征检测的成像效果,出现图1中所示的分像问题,影响生物特征检测的准确度。After the detection beam returns from the external object, it needs to pass through the backlight module in the display screen to reach the biometric detection device under the screen. Therefore, the microstructure on the light guide plate in the backlight module will affect the imaging effect of biometric detection. The segmentation problem shown in Figure 1 affects the accuracy of biometric detection.
发明内容SUMMARY OF THE INVENTION
本申请提供了一种屏下生物特征检测系统和电子设备,能够提高屏下生物特征检测的准确度。The present application provides an under-screen biometric detection system and electronic device, which can improve the accuracy of under-screen biometric detection.
第一方面,本申请提供了一种屏下生物特征检测系统,包括被动式发光的显示装置和生物特征检测装置,所述生物特征检测装置用于设置在所述被动式发光的显示装置下方以实现屏下生物特征检测,所述被动式发光的显示装置包括显示面板和背光模组,所述背光模组设置在所述显示面板的下方,所述显示面板用于显示画面,所述背光模组用于为所述显示面板实现画面显示提供可见光,所述背光模组包括:In a first aspect, the present application provides an under-screen biometric detection system, including a passively luminescent display device and a biometric detection device, the biometric detection device being configured to be disposed under the passively luminescent display device to realize a screen For biometric detection, the passively emitting display device includes a display panel and a backlight module, the backlight module is arranged below the display panel, the display panel is used for displaying pictures, and the backlight module is used for Provide visible light for the display panel to realize picture display, and the backlight module includes:
导光板,包括相对设置的上表面与下表面,其中,所述导光板的上表面为所述导光板面对所述显示面板的一侧表面,所述导光板的下表面为所述导光板背对所述显示面板一侧的表面,所述导光板面对所述显示面板的一侧具有朝向所述显示面板延伸的第一聚光结构,所述导光板的上表面包括所述第一聚光结构的表面,所述第一聚光结构用于对从所述导光板内部出射到所述导光板上表面的光线进行会聚;其中,从所述导光板的下表面到所述生物特征检测装置的感光面的光路中设置有第二聚光结构,所述第二聚光结构用于对从所述导光板的下表面出射的光线进行会聚;A light guide plate, comprising an upper surface and a lower surface arranged opposite to each other, wherein the upper surface of the light guide plate is the side surface of the light guide plate facing the display panel, and the lower surface of the light guide plate is the light guide plate The surface on the side facing away from the display panel, the side of the light guide plate facing the display panel has a first light-concentrating structure extending toward the display panel, and the upper surface of the light guide plate includes the first light-concentrating structure. the surface of the light-concentrating structure, the first light-concentrating structure is used for condensing the light emitted from the inside of the light guide plate to the upper surface of the light guide plate; wherein, from the lower surface of the light guide plate to the biological feature A second light condensing structure is arranged in the light path of the photosensitive surface of the detection device, and the second light condensing structure is used for condensing the light emitted from the lower surface of the light guide plate;
所述生物特征检测装置包括:The biometric detection device includes:
图像传感器,用于透过所述被动式发光的显示装置接收从所述被动式发光的显示装置上方的外部对象返回的检测光束,其中,从外部对象返回的检测光束在经过所述第一聚光结构后被分散传输,而被分散传输的检测光束在经过所述第二聚光结构后被会聚,经所述第二聚光结构会聚后的检测光束用于所述生物特征检测装置获取所述外部对象的生物特征信息。an image sensor for receiving, through the passively emitting display device, a detection light beam returned from an external object above the passively emitting display device, wherein the detection light beam returned from the external object passes through the first light condensing structure Then, it is dispersed and transmitted, and the detection beam that is dispersed and transmitted is condensed after passing through the second condensing structure. The subject's biometric information.
在一些可选的实现方式中,所述第一聚光结构与所述第二聚光结构均为棱镜结构,并且二者相背设置;或者In some optional implementation manners, both the first light-concentrating structure and the second light-concentrating structure are prism structures, and they are disposed opposite to each other; or
所述第一聚光结构和所述第二聚光结构均为弧形凸起结构,并且二者相背设置。The first light-concentrating structure and the second light-concentrating structure are both arc-shaped convex structures, and they are arranged opposite to each other.
在一些可选的实现方式中,所述第一聚光结构包括多条并行排列的第一棱镜,所述第二聚光结构包括多条并列排布的第二棱镜,其中,所述多条第一棱镜和所述多条第二棱镜一一正对且相背设置;或者In some optional implementations, the first light-concentrating structure includes a plurality of first prisms arranged in parallel, and the second light-concentrating structure includes a plurality of second prisms arranged in parallel, wherein the plurality of The first prism and the plurality of second prisms are arranged one by one facing each other and opposite to each other; or
所述第一聚光结构包括多条并行排列的第一棱镜,所述第二聚光结构包括单个第三棱镜,其中,所述多条第一棱镜和所述第三棱镜相背设置;或者The first light collecting structure includes a plurality of first prisms arranged in parallel, the second light collecting structure includes a single third prism, wherein the plurality of first prisms and the third prism are arranged opposite to each other; or
所述第一聚光结构包括多条并行排列的第一弧形凸起结构,所述第二聚光结构包括多条并列排布的第二弧形凸起结构,其中,所述多条第一弧形凸起结构和所述多条第二弧形凸起结构一一正对且相背设置;或者The first light-concentrating structure includes a plurality of first arc-shaped convex structures arranged in parallel, and the second light-concentrating structure includes a plurality of second arc-shaped convex structures arranged in parallel, wherein the plurality of first arc-shaped convex structures are arranged in parallel. An arc-shaped protruding structure and the plurality of second arc-shaped protruding structures are arranged one by one and opposite to each other; or
所述第一聚光结构包括并行排列的多条第一弧形凸起结构,所述第二聚光结构包括单个第三弧形凸起结构,其中,所述多条第一弧形凸起结构和所述第三弧形凸起结构相背设置。The first light-concentrating structure includes a plurality of first arc-shaped convex structures arranged in parallel, the second light-concentrating structure includes a single third arc-shaped convex structure, wherein the plurality of first arc-shaped convex structures The structure and the third arc-shaped convex structure are arranged opposite to each other.
在一些可选的实现方式中,相互正对设置的所述第一棱镜和第二棱镜为相同的棱镜;或者In some optional implementation manners, the first prism and the second prism disposed facing each other are the same prism; or
所述第一棱镜和第三棱镜为相似形,并且所述第三棱镜的尺寸比所述第一棱镜的尺寸大。The first prism and the third prism have similar shapes, and the size of the third prism is larger than that of the first prism.
在一些可选的实现方式中,所述第三棱镜的尺寸被配置为使得所述生物特征检测装置的视场范围内的从所述导光板下表面出射的光均被会聚。In some optional implementations, the size of the third prism is configured such that all light emitted from the lower surface of the light guide plate within the field of view of the biometric detection device is converged.
在一些可选的实现方式中,所述多条并行排列的第一弧形凸起结构为多个第一透镜,所述多条并行排列的第二弧形凸起结构为多个第二透镜,相互正对设置的所述第一透镜和第二透镜的焦点重合,且所述第一透镜和所述第二透镜的直径的比值为所述第一透镜和所述第二透镜的焦距之比。In some optional implementations, the plurality of first arc-shaped convex structures arranged in parallel are a plurality of first lenses, and the plurality of second arc-shaped convex structures arranged in parallel are a plurality of second lenses , the focal points of the first lens and the second lens are coincident, and the ratio of the diameters of the first lens and the second lens is the difference between the focal lengths of the first lens and the second lens Compare.
在一些可选的实现方式中,所述多条第一棱镜为三棱镜,所述第三棱镜也为三棱镜,所述第一棱镜和所述第三棱镜的顶角相等,并且朝向相反。In some optional implementation manners, the plurality of first prisms are triangular prisms, the third prisms are also triangular prisms, and the vertex angles of the first prisms and the third prisms are equal and opposite.
在一些可选的实现方式中,所述背光模组还包括:In some optional implementations, the backlight module further includes:
反射片,设置在所述导光板的下表面的下方,所述第二聚光结构设置在所述反射片的下表面。The reflection sheet is arranged below the lower surface of the light guide plate, and the second light concentrating structure is arranged at the lower surface of the reflection sheet.
在一些可选的实现方式中,所述第二聚光结构设置在所述反射片下表面的全部区域,或者设置在所述反射片的下表面的局部区域,所述局部区域为所述生物特征检测装置的视场在所述反射片的下表面所正对的区域。In some optional implementations, the second light-concentrating structure is arranged on the entire area of the lower surface of the reflection sheet, or is arranged in a partial area of the lower surface of the reflection sheet, and the partial area is the biological The field of view of the feature detection device is in the area facing the lower surface of the reflective sheet.
在一些可选的实现方式中,所述背光模组还包括:In some optional implementations, the backlight module further includes:
金属补强板,设置在所述反射片的下方,所述金属补强板中设置有开孔,所述开孔的下方用于设置所述生物特征检测装置,所述第二聚光结构设置在所述开孔区域的下方。A metal reinforcement plate is arranged below the reflection sheet, and an opening is arranged in the metal reinforcement plate, and the lower part of the opening is used for disposing the biological feature detection device, and the second light-concentrating structure is arranged below the open area.
在一些可选的实现方式中,所述第二聚光结构的尺寸大于所述开孔的尺寸。In some optional implementations, the size of the second light-concentrating structure is larger than the size of the opening.
在一些可选的实现方式中,所述第二聚光结构设置在所述导光板下表面的局部区域;或者,所述导光板背对所述显示面板的一侧的局部局域延伸出来所述第二聚光结构,所述导光板的下表面包括所述第二聚光结构的下表面;所述局部区域为所述生物特征检测装置的视场在所述导光板的下表面所正对的区域。In some optional implementation manners, the second light-concentrating structure is disposed in a local area of the lower surface of the light guide plate; or, a local area of the side of the light guide plate facing away from the display panel extends out of the second light-concentrating structure, the lower surface of the light guide plate includes the lower surface of the second light-concentrating structure; the local area is where the field of view of the biometric detection device is on the lower surface of the light guide plate right area.
在一些可选的实现方式中,所述导光板的下表面设置有网点结构,所述导光板下表面的所述局部区域不设置所述网点结构。In some optional implementation manners, the lower surface of the light guide plate is provided with a dot structure, and the partial area of the lower surface of the light guide plate is not provided with the dot structure.
在一些可选的实现方式中,所述局部区域的周围区域的网点的分布被配置为使得所述局部区域的显示屏亮度和所述周围区域的显示屏亮度相当以使显示屏的亮度均匀。In some optional implementations, the distribution of the dots in the surrounding area of the local area is configured such that the brightness of the display screen in the local area and the display screen brightness in the surrounding area are comparable to make the brightness of the display screen uniform.
在一些可选的实现方式中,所述第二聚光结构设置在所述生物特征检测装置的感光面上。In some optional implementations, the second light-concentrating structure is disposed on the photosensitive surface of the biometric detection device.
在一些可选的实现方式中,所述导光板还包括入光面,位于所述上表面和所述下表面之间,所述背光模组还包括:In some optional implementations, the light guide plate further includes a light incident surface located between the upper surface and the lower surface, and the backlight module further includes:
背光光源,设置在所述导光板的所述入光面一侧,其中,所述背光光源发出的可见光经过所述入光面进入所述导光板内部,并从所述导光板的上表面出射,所述第一聚光结构的排布方向平行于所述入光面。The backlight source is arranged on one side of the light incident surface of the light guide plate, wherein the visible light emitted by the backlight light source enters the interior of the light guide plate through the light incident surface, and exits from the upper surface of the light guide plate , the arrangement direction of the first light concentrating structures is parallel to the light incident surface.
在一些可选的实现方式中,当所述第二聚光结构为多个时,所述第一聚光结构和所述第二聚光结构均为长条状结构。In some optional implementation manners, when there are multiple second light concentrating structures, both the first light concentrating structure and the second light concentrating structure are elongated structures.
在一些可选的实现方式中,所述生物特征检测装置还包括:In some optional implementations, the biometric detection device further includes:
检测光源,用于提供生物特征信息检测所需的检测光束;The detection light source is used to provide the detection beam required for the detection of biometric information;
其中,所述检测光源发射的检测光束从所述被动式发光的显示装置上方的外部对象返回后经过所述面板显示面板后进入所述背光模组,经过所述背光模组中的所述第一聚光结构被会聚后分散传输、并进一步经过所述第二聚光结构被会聚,最终入射至所述图像传感器的感光面。Wherein, the detection beam emitted by the detection light source returns from the external object above the passively emitting display device, passes through the panel display panel, and then enters the backlight module, and passes through the first backlight module in the backlight module. The light-condensing structure is condensed and then dispersed and transmitted, and is further condensed through the second light-concentrating structure, and finally incident on the photosensitive surface of the image sensor.
在一些可选的实现方式中,所述检测光源为红外光源,所述检测光束为近红外光。In some optional implementations, the detection light source is an infrared light source, and the detection light beam is near-infrared light.
在一些可选的实现方式中,所述生物特征检测装置还包括:In some optional implementations, the biometric detection device further includes:
滤光片,设置在所述背光模组和所述图像传感器的感光面之间,用于滤除不用于生物特征检测的波段的光信号。The filter is arranged between the backlight module and the photosensitive surface of the image sensor, and is used for filtering out the light signal of the wavelength band not used for biometric detection.
在一些可选的实现方式中,所述生物特征检测装置为指纹检测装置,用于检测来自所述被动式发光的显示装置上方的外部对象的指纹信息。In some optional implementations, the biometric detection device is a fingerprint detection device, configured to detect fingerprint information from an external object above the passively illuminated display device.
第二方面,本申请还提供了一种电子设备,包括:第一方面中任意一实现方式所述的屏下生物特征检测系统。In a second aspect, the present application further provides an electronic device, including: the under-screen biometric detection system according to any one of the implementation manners of the first aspect.
基于上述技术方案,所述第一聚光结构能够将从导光板内部出射到导光板的上表面的光线进行会聚,会聚的光线进一步分散传输以实现导光板的导光作用。对于从外部对象返回的检测光束来说,所述第一聚光结构可以对从外部对象返回的检测光束进行分光处理。进一步地,通过在从所述导光板的下表面到生物特征检测装置的感光面之间设置第二聚光结构,这样经过所述第一聚光结构进行分光处理的光线继续往下传输至所述第二聚光结构,所述第二聚光结构对经过分光处理后的光线进行合光处理,得到合光后的检测光束,基于该检测光束进行生物特征信息检测,从而能够避免图像的分像问题,提高生物特征检测的准确度。Based on the above technical solutions, the first light condensing structure can condense the light emitted from the inside of the light guide plate to the upper surface of the light guide plate, and the condensed light is further dispersed and transmitted to realize the light guiding effect of the light guide plate. For the detection beam returned from the external object, the first light condensing structure can perform spectral processing on the detection beam returned from the external object. Further, by arranging a second light condensing structure between the lower surface of the light guide plate and the photosensitive surface of the biometric detection device, the light that undergoes spectroscopic processing through the first light concentrating structure continues to be transmitted down to the The second light-converging structure, the second light-converging structure performs light-combining processing on the light that has undergone spectral processing to obtain a combined detection beam, and performs biometric information detection based on the detection beam, thereby avoiding image separation. Like problems, improve the accuracy of biometric detection.
附图说明Description of drawings
图1是导光板的结构示意图。FIG. 1 is a schematic structural diagram of a light guide plate.
图2是本申请可以适用的电子设备的平面示意图。FIG. 2 is a schematic plan view of an electronic device to which the present application can be applied.
图3是图2所示电子设备的一个实施例的部分截面示意图。FIG. 3 is a schematic partial cross-sectional view of one embodiment of the electronic device shown in FIG. 2 .
图4是一种背光模组的典型结构的示意图。FIG. 4 is a schematic diagram of a typical structure of a backlight module.
图5是导光板的一种微结构的示意图。FIG. 5 is a schematic diagram of a microstructure of the light guide plate.
图6是根据本申请实施例的背光模组的示意性结构图。FIG. 6 is a schematic structural diagram of a backlight module according to an embodiment of the present application.
图7至图8是第二聚光结构的典型结构的示意图。7 to 8 are schematic views of typical structures of the second light-concentrating structure.
图9是导光板的另一种微结构的示意图。FIG. 9 is a schematic diagram of another microstructure of the light guide plate.
图10是图9所示导光板的部分微结构的光路示意图。FIG. 10 is a schematic diagram of an optical path of a part of the microstructure of the light guide plate shown in FIG. 9 .
图11至图13是第二聚光结构的典型设置方式的示意图。11 to 13 are schematic diagrams of typical arrangements of the second light-concentrating structure.
图14是本申请实施例的LCD屏的示意性结构图。FIG. 14 is a schematic structural diagram of an LCD screen according to an embodiment of the present application.
图15是本申请实施例的生物特征检测装置的示意性结构图。FIG. 15 is a schematic structural diagram of a biological feature detection apparatus according to an embodiment of the present application.
图16是本申请实施例的电子设备的示意性结构图。FIG. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
具体实施方式Detailed ways
在对本申请实施例的具体描述中,应当理解,当基板、片、层或图案被称为在另一个基板、另一个片、另一个层或另一个图案“上”或“下”时,它可以“直接地”或“间接地”在另一个基板、另一个片、另一个层或另一个图案上,或者还可以存在一个或多个中间层。为了清楚的目的,可以夸大、省略或者示意性地表示说明书附图中的每一个层的厚度和大小。此外,附图中元件的大小并非完全反映实际大小。In the detailed description of embodiments of the present application, it will be understood that when a substrate, sheet, layer or pattern is referred to as being "on" or "under" another substrate, sheet, layer or pattern, it It may be "directly" or "indirectly" on another substrate, another sheet, another layer or another pattern, or one or more intervening layers may also be present. The thickness and size of each layer in the drawings of the specification may be exaggerated, omitted or schematically represented for the purpose of clarity. Furthermore, the sizes of elements in the drawings do not fully reflect actual sizes.
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,所描述的实施例仅仅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。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步定义和解释。进一步地,所描述的特征、结构可以以任何合适的方式结合在一个或更多实施方式中。It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Further, the described features and structures may be combined in any suitable manner in one or more embodiments.
在下文的描述中,提供许多具体细节以便能够充分理解本申请的实施方式。然而,本领域技术人员应意识到,即使没有所述特定细节中的一个或更多,或者采用其它的结构、组元等,也可以实践本申请的技术。In the following description, numerous specific details are provided in order to enable a thorough understanding of the embodiments of the present application. However, one skilled in the art will appreciate that the techniques of the present application may be practiced without one or more of the specific details, or with other structures, components, etc.
在介绍本申请实施例的技术方案之前,首先,结合图2和图3,对本申请所适用的电子设备作一简单说明。Before introducing the technical solutions of the embodiments of the present application, first, with reference to FIG. 2 and FIG. 3 , a brief description of the electronic equipment to which the present application is applied is given.
图2是本申请适用的电子设备100的立体结构图,图3是图2所示的电子设备100沿A-A方向的部分剖视图。FIG. 2 is a perspective structural view of an
应理解,本申请实施例的电子设备100可以包括但不限于智能手机、平板电脑、计算机、笔记本电脑、智能可穿戴设备、智能门锁等。为了实现电子设备100的基本功能,除了包括以下所示例的模块或组件外,本申请实施例中的电子设备100还可以包括其他必须的模块或组件。以电子设备为智能手机为例,其还可以包括通信模块、扬声器、麦克风、电池等。It should be understood that the
为便于区分和说明,将电子设备100在正常使用状态下,电子设备100的显示屏指向或面对使用者的方向定义为“上”,将与之相反,或者背对使用者的方向定义为“下”。所述电子设备100具有相互垂直的长度方向、宽度方向和厚度方向,如图2和图3所示,分别用Y轴、X轴和Z轴表示。应当理解,本申请实施例中对各方向的定义只是为了方便描述,并非作为本申请实施例的限定。For the convenience of distinction and description, in the normal use state of the
在一些实施例中,如图3所示,该电子设备100可以包括显示模组12和检测模组19,该检测模组19设置在显示模组12的下方,该显示模组12上具有可供外部对象1000接触的检测区域VA。当外部对象1000接触所述检测区域VA时,检测模组19可以采集外部对象1000的生物特征图像,并获取相应的生物特征信息。外部对象1000可以例如为手指,对应地,该检测模组19可以采集手指的指纹图像,获取相应指纹特征信息。In some embodiments, as shown in FIG. 3 , the
可选地,在一些实施例中,如图3所示,所述电子设备100还可以包括保护层11,设置在所述显示模组12的上方并覆盖所述电子设备100的正面。也就是说,所述保护层11的上表面(未标号)可以为所述电子设备100的最外面的表面。这种情况下,所述检测区域VA为所述保护层11的上表面的至少部分区域。例如,所述检测区域VA可以为所述保护层11的上表面的任意局部区域,或为所述保护层11的上表面的全部区域。在一个实施例中,电子设备100的A-A线平行于Y轴,且和检测区域VA相交。更具体地,电子设备100的A-A线可以为经过检测区域VA的中心点的平行于Y轴直线。Optionally, in some embodiments, as shown in FIG. 3 , the
应当理解,所述保护层11可以包括实际使用时用户贴附的塑料膜、钢化膜、或其他膜等,保护层11的上表面为进行生物特征检测时,外部对象1000直接接触的表面。所述保护层11的上表面是所述电子设备100的最外面。在这里,例如但不限于,外部对象1000可以为手指,生物特征为指纹。其他或变更实施例中,所述生物特征可以但不限于为指纹、趾纹、掌纹、皮肤纹路、血管等。It should be understood that the
在一些实施例中,所述显示模组12可以为自发光显示模组,其具有自发光显示单元,例如该显示模组12可以为OLED显示模组,或者微型发光二极管(Micro-LED)显示模组等,该显示模组12中的自发光显示单元可以为生物特征检测提供检测光束,例如,可以将显示模组12中的部分自发光单元用作生物特征检测的检测光源。In some embodiments, the
在另一些实施例中,所述显示模组12可以为被动发光的显示模组,例如,LCD显示模组,其可以包括液晶显示面板(图3未示出)和背光单元(图3未示出)。所述背光单元用于向所述液晶显示面板所在的一侧提供可见光,所述可见光能够透过所述液晶显示面板和保护层11后达到使用者的眼睛,从而实现信息显示,包括但不限于文字显示、图像显示等。In other embodiments, the
在一些实施例中,所述液晶显示面板可以包括CF(Color Filter)基板、液晶层、TFT(Thin Film Transistor)基板以及偏振片等多层结构。所述背光单元可以包括反射片、导光板、扩散片、增光片等多层结构。In some embodiments, the liquid crystal display panel may include a CF (Color Filter) substrate, a liquid crystal layer, a TFT (Thin Film Transistor) substrate, and a multi-layer structure such as a polarizer. The backlight unit may include a multi-layer structure such as a reflective sheet, a light guide plate, a diffusion sheet, and a light enhancement sheet.
进一步地,如图3所示,所述电子设备100还包括检测光源16,可以提供检测光束101,所述检测光束101能够穿透所述保护层11到达外部对象1000。检测光束101在外部对象1000上发生反射或者检测光束101进入外部对象1000内部后透射出来,从而携带有外部对象1000的生物特征信息。携带外部对象1000的生物特征信息的检测光束101能够穿透所述保护层11和显示模组12后被检测模组19接收,并用于生成外部对象1000的生物特征图像。Further, as shown in FIG. 3 , the
在一些实施例中,所述保护层11包括非透明部112和透明部114,所述非透明部112位于所述透明部114的周围或边缘位置。所述非透明部112能够遮挡可见光,所述透明部114能够透射可见光。所述保护层11背对所述显示模组12的一侧的表面(即保护层11的上表面)具有所述检测区域VA,所述检测区域VA是保护层11的上表面的局部区域。可选地,所述检测区域VA的部分或全部位于所述透明部114。显示模组12能够透光所述保护层11的透明部114出射可见光从而实现信息显示。In some embodiments, the
所述检测光源16位于所述非透明部112的下方。所述检测光源16能够向保护层11的上方提供检测光束101。所述检测光束101的波长不同于可见光的波长。所述检测光束101的波长可以不同于所述可见光。所述检测光束101可以是非可见光。例如但不限于,所述检测光束101可以是波长范围为780纳米至2000纳米之间的近红外光。进一步地,所述检测光束101的波长可以为850纳米或940纳米。所述非透明部112和透明部114都能够透射所述检测光束101。The
可选的,所述电子设备100进一步包括中框13,所述中框13包括底部131与侧部132,其中所述显示装置12设置在所述中框13与所述保护层11之间。所述中框的底部131上设置有通孔1311,所述检测模组19例如通过所述通孔1311接收由外部对象1000返回的检测光束。所述侧部131位于显示模组132的侧面且正对所述非透明部112。所述检测光源16例如但不局限于设置在所述侧部132上。Optionally, the
可变更地,所述中框的底部131上也可不设置所述通孔1311,所述检测模组19设置在所述底部131面对所述显示模组12的一侧表面上。Alternatively, the through
可选的,在某些实施例中,所述检测光源16包括发光单元161,用于发射检测光束。进一步可选的,所述检测光源16进一步包括转换单元162。所述转换单元162例如设置在所述发光单元161上,用于转换所述发光单元161发出的检测光束的出射角度。Optionally, in some embodiments, the
然,可变更地,在某些其它实施方式中,所述检测光源16也可设置在所述显示模组12的下方,又或者集成在背光单元的背光光源中等。Of course, alternatively, in some other implementation manners, the
可选地,在一些实施例中,所述保护层11可以是单层结构,或者多层结构。所述保护层11大致为具有预定长度、宽度、厚度的薄板。所述保护层11具有和Y轴对应的长度方向、和X轴对应的宽度方向、和Z轴对应的厚度方向。所述保护层11可以包括透明基板(图未示)和光学油墨层(图未示),所述透明基板能够透射可见光和检测光束101,所述光学油墨层能够遮挡可见光且透射检测光束101。所述光学油墨层可以设置在保护层11的下表面的靠近边缘的位置,从而使得保护层11形成所述非透明部112和透明部114。可选地,所述透明基材例如但不限于为玻璃、塑料、树脂或其他任意透明材料。所述光学油墨层例如但不限于为能够透射近红外光且遮挡可见光的红外油墨,此时,检测模组19可以采用近红外光作为检测光束101以实现外部对象1000的生物特征检测。Optionally, in some embodiments, the
当所述显示模组12为LCD显示模组时,结合图4,说明LCD显示模组中的背光单元的工作原理。When the
作为一种典型结构,如图4所示,所述背光单元从上层到下层依次包括:增量片115、扩散片116、导光板117、背光光源17、和反射片118。As a typical structure, as shown in FIG. 4 , the backlight unit includes, from the upper layer to the lower layer, an increasing
所述反射片118用于将从导光板117下表面出射的可见光线向显示面板的正上方全反射,所述导光板117用于将背光光源17发出的可见光线导向整个显示面板,扩散片116用于将经所述导光板117传输的可见光信号扩散后传输至所述增亮片112,所述增亮片112用于修正接收的可见光信号的出光角度以增加从显示面板的正面出射的可见光信号的强度。The
为了实现导光板117的导光作用,通常在导光板117上形成有两层微结构,如图5所示,导光板117面对显示面板的一侧形成有聚光微结构(V-cut结构)1172,导光板117背对显示面板的一侧形成有网点微结构1171。在具体实现中,背光光源17可以设置在导光板117的侧面一侧,其发出的可见光线进入到导光板117的内部,当可见光线入射到下表面的网点微结构1171时,反射光会往各个角度扩散,然后由导光板117上表面的聚光微结构1172会聚后射出,从导光板117上表面出射的可见光信号配合背光单元中的其他结构从而实现显示面板的正面发光。但是,在实际应用中,从外部对象1000返回的检测光束101会依次穿透保护层11和显示模组12后到达所述检测模组19。也就是说,检测光束101也会在显示模组12中的背光单元中传输,这样,检测光束101的传输会受到导光板的微结构的影响,如图1所示,由于导光板上形成有V-cut结构,从V-cut结构上方入射的检测光束经V-cut结构后会被会聚,会聚的检测光束进一步分散传输,相当于从外部对象1000上的某个点返回的多个检测光束被会聚后,进一步分散传输形成多个分散的检测光束,则基于该多个分散的检测光束在检测模组19上进行成像时,会出现类似于图1所示的分像问题,影响生物特征检测的准确度,并且该V-cut结构会将检测波束向屏幕下方发散,导致信号的损失,影响成像效果。In order to realize the light guiding function of the
有鉴于此,本申请实施例提供了一种解决方案,通过在导光板和检测模组之间的光路中增加第二聚光结构,能够对经导光板的微结构会聚后分散传输的信号在进入检测模组前进行会聚处理,从而能够降低或消除导光板中的微结构对生物特征检测的影响,进而提升生物特征检测的准确度。In view of this, the embodiments of the present application provide a solution. By adding a second light concentrating structure in the light path between the light guide plate and the detection module, the signals that are dispersed and transmitted after the microstructures of the light guide plate are converged can be Convergence processing is performed before entering the detection module, so that the influence of the microstructure in the light guide plate on the biometric detection can be reduced or eliminated, thereby improving the accuracy of the biometric detection.
应理解,本申请实施例的检测模组也可称为生物特征检测模组,生物特征检测装置,生物特征传感装置等,其可以用于采集外部对象的生物特征信息,例如,指纹信息,掌纹信息、3D人脸信息等。It should be understood that the detection module in the embodiment of the present application may also be referred to as a biometric detection module, a biometric detection device, a biometric sensing device, etc., which can be used to collect biometric information of external objects, for example, fingerprint information, Palm print information, 3D face information, etc.
以下,结合图6至图13,说明根据本申请实施例的背光模组。Hereinafter, with reference to FIGS. 6 to 13 , a backlight module according to an embodiment of the present application will be described.
应理解,本申请实施例中的背光模组为显示模组例如LCD显示模组中的背光模组,该显示模组可以还包括显示面板,背光模组设置在显示面板的下方,所述显示面板用于显示画面,所述背光模组用于为所述显示面板实现画面显示提供可见光。然,可变更地,所述显示模组也可为电子纸显示模组等合适的被动式发光显示模组。It should be understood that the backlight module in the embodiment of the present application is a display module such as a backlight module in an LCD display module, and the display module may further include a display panel, and the backlight module is arranged below the display panel, and the display The panel is used for displaying pictures, and the backlight module is used for providing visible light for the display panel to realize picture display. Of course, alternatively, the display module can also be a suitable passive light-emitting display module such as an electronic paper display module.
如图6所示,背光模组20的下方用于设置生物特征检测装置30以实现屏下生物特征信息检测,其中,背光模组20包括:As shown in FIG. 6 , the lower part of the
所述导光板200,包括相对的上表面201与下表面202,其中,所述导光板200的上表面201为所述导光板200面对所述显示面板的一侧表面,所述导光板200的下表面202为所述导光板200背对所述显示面板一侧的表面,所述导光板200面对所述显示面板的一侧具有朝向所述显示面板延伸的第一聚光结构210,所述导光板200的上表面201包括所述第一聚光结构210的表面,所述第一聚光结构210用于对从所述导光板200内部出射到所述导光板上表面201的光线进行会聚;The
其中,从所述导光板200的下表面到所述生物特征检测装置30的感光面的光路中设置有第二聚光结构40,所述第二聚光结构40用于对从所述导光板200的下表面202出射的检测光线进行会聚。Wherein, a second
或者,所述导光板200背对所述显示面板的一侧具有朝背离所述显示面板方向(Z轴方向的反方向)延伸的第二聚光结构40,所述导光板200的下表面202包括所述第二聚光结构40的表面。可选的,所述导光板200背对所述显示面板的一侧的局部区域延伸出来所述第二聚光结构40。Alternatively, a side of the
这里,所述第一聚光结构210可以对应于图5中的聚光微结构1172,该生物特征检测装置30可以对应于图3中的检测模组19,其相关实现可以参考前述实施例的相关描述,为了简洁,这里不再赘述。Here, the first light-concentrating
应理解,在本申请实施例中,所述第一聚光结构210为所述导光板200中的结构,即所述第一聚光结构210属于所述导光板200,其可以配合背光模组20中的其他结构实现显示面板的显示功能,本申请并不限定所述第一聚光结构210的形成方式,例如,在一种实现方式中,所述第一聚光结构210是在导光板200的基板上制备得到的,或者在其他替代实现方式中,所述第一聚光结构210和所述导光板200中的其他结构是由相同材料形成的一体结构。It should be understood that, in the embodiment of the present application, the first light-concentrating
在具体光路中,所述第一聚光结构210可以将从导光板200内部出射到导光板200的上表面201的光线进行会聚,会聚的光线进一步分散传输从而能够实现导光板200的导光作用。对于从外部对象1000返回的检测光束501来说,所述第一聚光结构210可以对检测光束501进行会聚处理,会聚的检测光束进一步分散传输,形成检测光束511,基于该检测光束511进行成像,从而可能产生图1中的分像问题。In a specific light path, the first
进一步地,分散传输的检测光束511继续往下传输至所述第二聚光结构40,所述第二聚光结构40对分散传输的检测光束511进行会聚处理,得到会聚后的检测光束502,该生物特征检测装置30接收该检测光束502,并基于该检测光束502进行生物特征检测,从而能够避免成像时的分像问题,提高生物特征检测的准确度。Further, the scattered
应理解,本申请对于所述第一聚光结构210的形状、大小和排布方式等不作具体限定,只要能够与背光模组20中的其他结构进行配合实现显示模组的显示目的即可。图6中第一聚光结构210和第二聚光结构40中的具体结构仅为示例,而不应对本申请构成任何限定。It should be understood that the present application does not specifically limit the shape, size and arrangement of the first
作为一个实施例,所述第一聚光结构210为棱镜结构,例如,如图8所示,所述第一聚光结构210可以包括多条并行排列的第一棱镜211,或者,所述第一聚光结构210也可以包括按照其他方式排布的多个第一棱镜。As an embodiment, the first
作为另一实施例,所述第一聚光结构210也可以为弧形凸起结构,例如,如图7所示,所述第一聚光结构210包括多条并列排布的第一弧形凸起,或者也可以包括按照其他方式排布的多个第一弧形凸起。As another embodiment, the first light-concentrating
当所述第一聚光结构210为棱镜结构时,所述第二聚光结构40也可以设计为棱镜结构,并且可以设计为与所述第一聚光结构210相背设置的棱镜结构。When the first
作为一个示例,如图8所示,所述第一聚光结构210包括多条并列排列的第一棱镜211,所述第二聚光结构40包括多条并列排列的第二棱镜42,所述多条第二棱镜42和所述多条第一棱镜211一一正对。As an example, as shown in FIG. 8 , the first light-concentrating
其中,所述第二聚光结构40中的第二棱镜42和正对的第一棱镜211为形状和尺寸相同的棱镜,并且所述第二棱镜42和正对的第一棱镜211相背且对齐设置。这样,经所述第一聚光结构中的第一棱镜211对检测光束501进行会聚处理后,会聚的检测光束进一步分散传输,形成检测光束511传输至所述第二聚光结构40后,经所述第二聚光结构40中的第二棱镜422进行会聚处理形成检测光束502传输至生物特征检测装置30,进一步该生物特征检测装置30基于该检测光束502进行生物特征能有利于消除成像时的分像问题。The
应理解,所述多条第一棱镜211可以为相同的棱镜,或者也可以为不同的棱镜,本申请实施例对此不作限定。It should be understood that the plurality of
当所述多条第一棱镜211为相同的棱镜时,所述多条第二棱镜42也可以为相同的棱镜,并且所述多条第一棱镜211和所述多条第二棱镜42一一相背且对齐设置。When the plurality of
当多条第一棱镜211为不同的棱镜时,所述多条第二棱镜42也可以为不同的棱镜,但是第二棱镜42和正对的第一棱镜211为相同的棱镜,并且所述第一棱镜211和正对的第二棱镜42位于同一检测光束的光路上,以使经所述第一棱镜211会聚并分散传输的检测光束能够通过正对的第二棱镜42进行会聚处理,从而达到消除分像问题的目的。When the plurality of
作为另一示例,如图9所示,所述第一聚光结构210包括多条并列排列的第一棱镜211,所述第二聚光结构40包括单个第三棱镜43,所述第三棱镜43和所述第一棱镜211为形状相同但是尺寸不同的棱镜(即二者为相似形),并且所述第三棱镜43和所述多个第一棱镜211相背设置。这种情况下,所述第三棱镜43不需要与所述第一棱镜211进行对齐设置。经所述第一聚光结构210中的多个第一棱镜211对从外部对象1000返回的检测光束501进行会聚处理后,会聚的检测光束进一步分散传输,形成检测光束511,传输至所述第二聚光结构40后,进一步经所述第二聚光结构40中的第三棱镜43进行会聚处理形成检测光束502传输至生物特征检测装置30,进一步该生物特征检测装置30基于该检测光束502进行生物特征检测有利于消除成像时的分像问题。As another example, as shown in FIG. 9 , the first
作为一个具体实现方式,所述第一棱镜211为三棱镜,所述第二棱镜42或第三棱镜43也为三棱镜,所述第一聚光结构210中的三棱镜的顶角和所述第二聚光结构40中的三棱镜的顶角相同,并且朝向相反。As a specific implementation manner, the
可变更地,在某些实施方式中,如图9所示,所述第一聚光结构210为弧形凸起结构。请一并参阅图6,所述第二聚光结构40也可以设计为正对的弧形凸起结构,并且可以设计为与所述第一聚光结构210相背设置的弧形凸起结构。Alternatively, in some embodiments, as shown in FIG. 9 , the first light-concentrating
作为一个实施例,所述第一聚光结构210包括多条并列排布的第一弧形凸起结构,此情况下,作为一种实现方式,所述第二聚光结构40可以包括多条并列排布的第二弧形凸起结构,其中,所述多条第一弧形凸起结构和所述多条第二弧形凸起结构一一正对,并且每条第二弧形凸起结构和正对的第一弧形凸起结构相背设置;作为另一种实现方式,所述第二聚光结构40包括单个第三弧形凸起结构,其中,所述多条第一弧形凸起结构和所述第三弧形凸起结构相背设置。As an embodiment, the first light-concentrating
举例来说,如图10所示,所述多条并列排布的第一弧形凸起结构可以为多个第一透镜2111,所述多条并列排布的第二弧形凸起结构可以为多个第二透镜412,其中,所述第二透镜412设置在正对的第一透镜2111的下方,所述第一透镜2111和正对的第二透镜412的焦点f重合,且所述第一透镜2111的直径D1和所述第二透镜412的直径D2的比值为所述第一透镜2111的焦距f1和所述第二透镜412的焦距f2的比值。可选的,所述第二透镜412的直径D2小于所述第一透镜2111的直径D1。For example, as shown in FIG. 10 , the plurality of side-by-side first arc-shaped convex structures may be a plurality of
相应地,从外部对象100返回的检测光束501进入背光模组20后,经背光模组20的导光板200中的第一透镜2111会聚后形成检测光束511,检测光束511进一步传输至对应的第二透镜412,经所述第二透镜412会聚后形成检测光束502,因此,基于上述设置,使得从导光板200上方入射的检测光束经过所述第一透镜2111和所述第二透镜412传输后能够被最大程度会聚到生物特征检测装置30的感光面,有利于保证检测光束的无损或接近无损的传输,提升生物特征检测的成像质量。Correspondingly, after the
可选地,在一些实施例中,所述多个第二透镜412设置在所述导光板200下表面202的局部区域,或者说,所述导光板200背对所述显示面板的一侧的局部区域延伸出来所述多个第二透镜412。所述局部区域为生物特征检测装置30的视场在所述导光板200下表面202正对的检测区域。所述导光板200的下表面202包括所述多个第二透镜412的表面。如此,能够使得垂直向下(沿Z轴方向的反方向)入射到第一透镜2111表面的检测光束在通过所述第二透镜412后的传播方向基本不变,从而能够提高生物特征感测的精确度。Optionally, in some embodiments, the plurality of
作为一种具体实现方式,可以根据所述多个第二透镜412的尺寸和排布方式修改导光板200下表面上所述局部区域中的网点结构的尺寸和排布方式,以使得通过所述多个第一透镜2111和所述局部区域中多个第二透镜412对光路的处理,能够实现检测光束经过所述导光板200上的所述局部区域时的无损失或接近无损失的传输。As a specific implementation manner, the size and arrangement of the dot structure in the local area on the lower surface of the
综上前述实施例中的检测光束的光路传输来看,所述第一聚光结构210可以将沿着特定方向(例如垂直显示面板的方向或者沿所述Z轴方向的反方向)传输的检测光束501(假设该检测光束501是来自外部对象上的同一点的两束光,外部对象距离成像面距离较远,可以近似认为这两束光为平行光)进行会聚,则会聚后的检测光束转换为沿其他方向(例如相对于显示面板倾斜的方向)分散传输的检测光束511,则基于分散传输的检测光束511进行成像会形成多个外部对象的像,导致前面所提到的分像问题。在本申请实施例中,通过在进入生物特征检测装置30之前的光路中设置第二聚光结构40对所述分散传输的检测光束511进行会聚处理,能够使得所述分散传输的检测光束511被会聚,可以理解为经过所述第二聚光结构40后所述分散传输的检测光束511被转换为沿原来方向(即检测光束501的传输方向)传输,也就是说,相对于消除了第一聚光结构210对检测光束的光路传输的影响,因此能够消除导光板200的微结构所导致的成像时的分像问题。In view of the optical path transmission of the detection beam in the foregoing embodiments, the first
可选的,在某些实施方式中,通过设置与所述多个第一聚光结构210一一相背对的所述多个第二聚光结构40,从而当所述第一聚光结构210将入射到所述第一聚光结构210的第一方向的光信号转换为至少一个第二方向的光信号,接着,所述第二聚光结构40用于将经所述第一聚光结构210传输的所述至少一个第二方向的光信号再次转换为所述第一方向的光信号并传输至所述生物特征检测装置30。如此,能够解决检测光束在通过导光板200上的第一聚光结构210后出现分像的问题。应理解,在本申请实施例中,所述第二聚光结构40可以固定在从导光板200下表面到所述生物特征检测装置30的感光面之间的任一位置,例如,可以通过现有的结构实现所述第二聚光结构40的固定,或者也可以通过新增结构,比如新增支架,或者支撑板等实现所述第二聚光结构40的固定。又或者,所述导光板200背对所述显示面板的一侧的局部区域延伸出来第二聚光结构40,即,所述第二聚光结构40为所述导光板200本身的一部分。Optionally, in some embodiments, by arranging the plurality of second
在本申请一些实施例中,如图11至图13所示,所述背光模组20还包括:In some embodiments of the present application, as shown in FIG. 11 to FIG. 13 , the
反射片300,所述反射片300设置在所述导光板200的下表面的下方,所述反射片300用于将从所述导光板200的下表面出射的光线反射回所述导光板300中,以提升光的利用效率。The
进一步地,在本申请另一些实施例中,如图11至图13所示,所述背光模组20还可以包括:Further, in other embodiments of the present application, as shown in FIG. 11 to FIG. 13 , the
金属补强板400,设置在所述反射片300的下方,所述金属补强板400中设置有开孔,所述生物特征检测装置30用于设置在所述开孔的下方,用于接收从外部对象返回的经所述开孔传输的检测光束以获取所述外部对象的生物特征信息。The
以下,结合图11至图13,以所述第一聚光结构210和所述第二聚光结构40均为棱镜结构为例,说明所述第二聚光结构40的具体设置方式,其他情况下所述第二聚光结构40的设置方式类似,为了简洁,这里不再赘述。11 to FIG. 13 , the first light-concentrating
作为一种设置方式,如图11所示,所述第二聚光结构40设置在所述反射片300的下表面。As an arrangement, as shown in FIG. 11 , the second light-concentrating
由于所述反射片300的下表面为平滑平面,将所述第二聚光结构40设置在所述反射片300的下表面,能够实现所述第一聚光结构210和所述第二聚光结构40的比较精准的对齐,进而能够实现所述第二聚光结构40对分散传输的检测光束进行比较精确的会聚处理。Since the lower surface of the
并且,采用该设置方式不需要对背光模组中的其他结构进行改造即可实现,能够降低对显示屏的显示功能的影响。In addition, this setting method can be implemented without modifying other structures in the backlight module, which can reduce the influence on the display function of the display screen.
作为一种具体实现,可以将所述第二聚光结构40黏贴在反射片300的下表面,例如可以通过光学胶将所述第二聚光结构40黏贴在所述反射片300的下表面,或者也可以采用其他方式将所述第二聚光结构40固定在所述反射片300的下表面。As a specific implementation, the second light-concentrating
在一些实施例中,所述第二聚光结构40设置在所述反射片300下表面的全部区域。In some embodiments, the second light-concentrating
在另一些实施例中,所述第二聚光结构40至少设置在所述反射片300的下表面的局部区域,所述局部区域为所述生物特征检测装置30的视场在所述反射片300的下表面所正对的区域,也就是说,所述第二聚光结构40只需对视场范围内的检测光束进行合光处理,视场范围外的检测光束该生物特征检测装置30不能接收到,因此可以不对其进行处理。In other embodiments, the second light-concentrating
需要说明的是,所述生物特征检测装置30的视场在所述背光模组20的每层结构中都对应相应的区域,所述生物特征检测装置30的视场在每层结构中所对应的区域从上到下依次缩小,如图13所示,所述生物特征检测装置30的视场在所述导光板200的下表面正对的区域为区域S1。It should be noted that the field of view of the
作为另一种设置方式,如图12所示,所述第二聚光结构40设置在所述金属补强板400的开孔区域的下方。As another arrangement manner, as shown in FIG. 12 , the second light-concentrating
在一些具体实现中,所述第二聚光结构40可以固定在所述开孔区域的下表面,或者也可以通过其他结构,例如支架固定在所述开孔区域的下方。In some specific implementations, the second light-concentrating
以所述第二聚光结构40为单个三棱镜为例,所述单个三棱镜可以固定在所述金属补强板400的开孔区域的下表面,所述单个三棱镜的靠近所述金属补强板400的一面的尺寸大于所述开孔的尺寸以使所述三棱镜能够固定于所述开孔区域的下表面,例如,所述三棱镜可以通过双面背胶,或者其他方式固定于所述金属补强板的下表面。Taking the second
在具体实现中,所述单个三棱镜的尺寸被配置为使得所述生物特征检测装置30的视场范围内的从所述导光板200下表面出射的光均被会聚,从而能够使得视场范围内的从外部对象返回的检测光束均能够被合成,并进一步传输至所述生物特征检测装置30,能够提升生物特征检测的成像质量。In a specific implementation, the size of the single triangular prism is configured so that the light emitted from the lower surface of the
作为再一种设置方式,如图13所示,所述第二聚光结构40至少设置在所述导光板200背对所述显示面板一侧的局部区域S1,所述局部区域S1为所述生物特征检测装置30的视场在所述导光板的下表面所正对的区域。其中,所述第二聚光结构40例如为所述导光板200背对所述显示面板一侧的局部区域S1上延伸出来的结构,或者,所述第二聚光结构40为设置在所述导光板200下表面上的结构。As another setting method, as shown in FIG. 13 , the second light-concentrating
如图13所示,所述导光板200的下表面形成有网点结构220,可以对所述导光板200中的局部区域S1进行改造以在所述局部区域S1设置所述第二聚光结构40。在一些实现方式中,所述导光板200下表面的所述局部区域S1不设置所述网点结构。或者在其他实现方式中,可以在所述第二聚光结构40的间隙中设置所述网点结构等。As shown in FIG. 13 , a
其中,该网点结构220可以对应于图5中的网点微结构1171,其用于将入射到导光板200下表面的光线向各个角度扩散以实现显示面板的正面的均匀发光,当在导光板200的下表面设置第二聚光结构时可能会影响显示面板的正面发光,因此,进一步地,可以对局部区域S1的周围区域的网点的分布进行调整,以使得所述局部区域的显示面板亮度和所述周围区域的显示面板亮度相当以使显示屏的亮度均匀。Wherein, the
例如,若在该局部区域S1设置所述第二聚光结构40之后,该局部区域上的显示面板的亮度降低,此情况下,可以设置该局部区域的周围区域的网点分布更密,或者调整该周围区域的网点对光线的扩散角度,从而提升该局部区域对应的显示面板的亮度。For example, if the brightness of the display panel in the local area is reduced after the second
作为又一种设置方式,所述第二聚光结构40设置在所述生物特征检测装置30的感光面上。As another arrangement manner, the second light-concentrating
在一些实施例中,可以通过光学胶或固定支架等将所述第二聚光结构40设置所述生物特征装置30的感光面上。In some embodiments, the second light-concentrating
可选地,在本申请一些实施例中,所述导光板200还包括入光面,位于所述导光板200的上表面和所述下表面之间,或者说,位于所述导光板200的侧边,所述背光模组20还包括:Optionally, in some embodiments of the present application, the
背光光源,设置在所述导光板200的入光面一侧,其中,所述背光光源发出的可见光经过所述入光面进入所述导光板200内部,并从所述导光板200的上表面出射出去,所述第一聚光结构210的排布方向平行于所述入光面。The backlight light source is arranged on the light incident surface side of the
应理解,该背光光源可以对应于图4中的背光光源17,具体实现可以参考图4所示实施例的相关描述,为了简洁,这里不再赘述。It should be understood that the backlight light source may correspond to the
如图14所示,本申请实施例还提供了一种LCD屏60,包括:显示面板61和背光模组62,该背光模组62设置在所述显示面板61的下方,其中,所述显示面板61例如但不局限可以对应于图3实施例中的液晶显示面板,该背光模组62可以对应于图6至图13所示实施例中的背光模组20,其相关实现参考前述实施例的相关描述,为了简洁,这里不再赘述。As shown in FIG. 14, an embodiment of the present application further provides an LCD screen 60, including: a display panel 61 and a backlight module 62, the backlight module 62 is disposed below the display panel 61, wherein the display The panel 61 can correspond to, for example but not limited to, the liquid crystal display panel in the embodiment shown in FIG. 3 , and the backlight module 62 can correspond to the
如图15所示,本申请实施例还提供了一种生物特征检测装置70,适用于具有被动式发光的显示装置的电子设备,所述生物特征检测装置70用于设置在所述被动式发光的显示装置下方以实现屏下生物特征检测。As shown in FIG. 15 , an embodiment of the present application further provides a biometric detection device 70 , which is suitable for an electronic device having a passively illuminated display device, and the biometric detection device 70 is configured to be arranged in the passively illuminated display. Below the device to achieve off-screen biometric detection.
所述被动式发光的显示装置例如但不局限于为LCD显示装置。例如,所述被动式发光的显示装置为上述具有背光模组20的显示装置。The passive light-emitting display device is, for example, but not limited to, an LCD display device. For example, the passive light-emitting display device is the above-mentioned display device having the
如上述实施例所述,所述LCD显示装置包括显示面板和背光模组20。所述背光模组20设置在所述显示面板的下方。所述显示面板用于显示画面。所述背光模组20用于为所述显示面板实现画面显示提供可见光。所述背光模组20包括导光板200。所述导光板200包括相对的上表面201与下表面202,其中,所述导光板200的上表面201为所述导光板200面对所述显示面板的一侧表面,所述导光板200的下表面202为所述导光板200背对所述显示面板一侧的表面。所述导光板200面对所述显示面板的一侧具有朝向所述显示面板延伸的第一聚光结构210。所述导光板200的上表面201包括所述第一聚光结构210的表面,所述第一聚光结构210用于对从所述导光板200内部出射到所述导光板200上表面201的光线进行会聚。其中,从所述导光板200的下表面202到所述生物特征检测装置70的感光面的光路中设置有第二聚光结构40,所述第二聚光结构40用于对从所述导光板200的下表面202出射的光线进行会聚。As described in the above embodiments, the LCD display device includes a display panel and a
所述生物特征检测装置70包还括:The biometric detection device 70 further includes:
图像传感器72,用于接收从所述LCD显示装置上方的外部对象1000返回的经所述第一聚光结构210会聚后分散传输,并进一步经所述第二聚光结构40会聚的检测光束,所述检测光束用于获取所述外部对象1000的生物特征信息。The image sensor 72 is configured to receive the detection light beam returned from the
这里,生物特征检测装置70对应于前述实施例中的生物特征检测装置30,相关实现可以参考前述实施例的相关描述,为了简洁,这里不再赘述。Here, the biometric detection apparatus 70 corresponds to the
在本申请一些实施例中,如图15所示,所述生物特征检测装置70还包括:检测光源71,用于提供生物特征信息检测所需的检测光束;In some embodiments of the present application, as shown in FIG. 15 , the biometric detection device 70 further includes: a detection light source 71 for providing a detection beam required for biometric information detection;
其中,所述检测光源71发射的检测光束从所述LCD显示装置上方的外部对象1000返回后经过所述显示面板后进入所述背光模组20,经过所述背光模组20中的所述第一聚光结构210被折射分散传输后进一步经过所述第二聚光结构被会聚,最终入射至所述图像传感器72的感光面。The detection light beam emitted by the detection light source 71 returns from the
所述检测光束是非可见光。例如所述检测光束可以是波长范围为780纳米至2000纳米之间的近红外光。更具体地,所述检测光束的波长可以为850纳米或940纳米。则所述检测光源可以为红外光源。The detection beam is invisible light. For example, the detection beam may be near-infrared light having a wavelength in the range of 780 nanometers to 2000 nanometers. More specifically, the wavelength of the detection beam may be 850 nanometers or 940 nanometers. Then the detection light source may be an infrared light source.
可选地,在本申请的一些实施例中,所述检测光源71集成在所述背光模组内。更具体地,所述检测光源和所述背光模组内的背光光源可以集成设置。例如,所述检测光源和所述背光光源并列集成设置。在其他可替代实施例中,所述检测光源和所述背光光源也可以通过非并列的方式集成设置。本申请实施例对此不做具体限定。Optionally, in some embodiments of the present application, the detection light source 71 is integrated in the backlight module. More specifically, the detection light source and the backlight light source in the backlight module may be integrated. For example, the detection light source and the backlight light source are arranged in parallel and integrated. In other alternative embodiments, the detection light source and the backlight light source may also be integrated in a non-parallel manner. This embodiment of the present application does not specifically limit this.
进一步地,在本申请一些实施例中,所述生物特征检测装置70还包括:Further, in some embodiments of the present application, the biometric detection device 70 further includes:
滤光片(图未示),所述滤光片可以设置在所述背光模组和所述图像传感器的感光面之间,用于滤除不用于生物特征检测的波段的光信号,由此,可以通过设置滤光片可以对将传输至图像传感器的可见光进行滤除,能够进一步提高生物特征检测的准确度。A filter (not shown in the figure), which can be arranged between the backlight module and the photosensitive surface of the image sensor, and is used to filter out the light signal in the wavelength band not used for biometric detection, thereby , the visible light to be transmitted to the image sensor can be filtered out by setting a filter, which can further improve the accuracy of biometric detection.
本申请实施例中,所述滤光片具体可以用于过滤掉可见光波长,例如,用于图像显示的可见光等。所述滤光片具体地可以包括一个或多个光学过滤器,所述一个或多个光学过滤器可以配置为例如带通过滤器,以滤除可见光光源发射的光,同时不滤除红外光信号。所述一个或多个光学过滤器可以实现为例如光学过滤涂层,该光学过滤涂层形成在一个或多个连续界面上,或可以实现为一个或多个离散的界面上。In the embodiment of the present application, the optical filter may specifically be used to filter out wavelengths of visible light, for example, visible light used for image display, and the like. The filter may in particular comprise one or more optical filters, which may be configured, for example, as band-pass filters to filter out light emitted by visible light sources, while not filtering out infrared light signals . The one or more optical filters may be implemented, for example, as optical filter coatings formed on one or more continuous interfaces, or may be implemented as one or more discrete interfaces.
在一些实施例中,所述生物特征检测装置70为指纹检测装置,用于检测来自LCD显示装置上方的外部对象的指纹信息。In some embodiments, the biometric detection device 70 is a fingerprint detection device for detecting fingerprint information from an external object above the LCD display device.
上述LCD显示装置也可被称为LCD屏。The above-described LCD display device may also be referred to as an LCD panel.
如图16所示,本申请实施例还提供了一种电子设备200,包括屏下生物特征检测系统80。所述屏下生物特征检测系统80包括LCD屏81,该LCD屏81可以为如图14所示的LCD屏60,具体实现可以参考前述实施例的相关描述,为了简洁,这里不再赘述。As shown in FIG. 16 , an embodiment of the present application further provides an
进一步地,所述电子设备200还可以包括:生物特征检测装置82,该生物特征检测装置82例如可以为图6至图13所示实施例中的生物特征检测装置30或图15中的生物特征检测装置70,具体实现可以参考前述实施例的相关描述,为了简洁,这里不再赘述。Further, the
所述生物特征检测装置82用于接收用于生物特征检测的检测光源发出的照射外部对象后穿过所述LCD屏中的背光模组的检测光束,所述检测光束用于检测所述外部对象的生物特征信息。The biometric detection device 82 is configured to receive the detection light beam emitted by the detection light source used for biometric detection to illuminate the external object and pass through the backlight module in the LCD screen, and the detection light beam is used to detect the external object. biometric information.
本申请实施例的电子设备200可以包括但不限于智能手机、平板电脑、计算机、笔记本电脑、智能可穿戴设备、智能门锁等。为了实现电子设备200的基本功能,除了包括以下所示例的模块或组件外,本申请实施例中的电子设备200还可以包括其他必须的模块或组件。以电子设备200为智能手机为例,其还可以包括通信模块、扬声器、麦克风、电池等。The
需要说明的是,当所述第二聚光结构40为多个时,上述第一聚光结构210和第二聚光结构40均为长条状结构。尤其地,所述第二聚光结构40为第二弧形凸起结构且为所述导光板200本身的结构时,所述第二聚光结构40与所述导光板200上的网点结构并不相同。It should be noted that, when there are multiple second
另外,本申请上述各实施例的背光模组20还可进一步扩散片和增光片,所述扩散片和增光片设置在所述导光板200和显示面板之间。其中,所述扩散片例如设置在所述增光片与所述导光板200之间,也可设置在所述显示面板与所述增光片之间。In addition, the
应理解,本申请描述中可能出现的上表面、下表面、出光面、入光面、发光面等,可以是实际存在的实体表面,也可以是假想表面,不影响本申请发明创造的技术方案实现,均属于本申请保护范围。另外,本申请描述中可能出现的“重叠”、“重合”、“交叠”,应理解为具有相同意思并可以相互替换。It should be understood that the upper surface, lower surface, light-emitting surface, light-incident surface, light-emitting surface, etc. that may appear in the description of this application may be actual solid surfaces or imaginary surfaces, and will not affect the technical solutions of the invention and creation of this application. The realization all belong to the protection scope of the present application. In addition, "overlap", "coincidence" and "overlapping" that may appear in the description of this application should be understood as having the same meaning and can be replaced with each other.
本领域技术人员可以理解,在不付出创造性劳动的前提下,本申请实施例的部分或全部,以及对于实施例的部分或全部的变形、替换、变更、拆分、组合、扩展等均应认为被本申请的发明创造思想所涵盖,属于本申请的保护范围。Those skilled in the art can understand that, without creative work, part or all of the embodiments of the present application, as well as some or all of the deformations, replacements, changes, splits, combinations, expansions, etc. of the embodiments should be considered as Covered by the inventive idea of the present application, it belongs to the protection scope of the present application.
在本申请中对于“一个实施例”、“实施例”、“示例实施例”等的任何引用表示结合该实施例描述的特定特征、结构或特性被包括在本申请的至少一个实施例中。在本说明书中不同位置出现的这种短语并不一定全部指相同的实施例。另外,当结合任何实施例描述特定的特征或结构时,所主张的是,结合这些实施例的其它实施例来实现这种特征或结构在本领域技术人员的技术范围内。Any reference in this application to "one embodiment," "an embodiment," "an example embodiment," etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. The appearances of such phrases in various places in this specification are not necessarily all referring to the same embodiment. Additionally, when a particular feature or structure is described in conjunction with any embodiment, it is claimed that it is within the skill of those skilled in the art to implement such feature or structure in conjunction with other embodiments of those embodiments.
本申请说明书中可能出现的“长度”、“宽度”、“上”、“下”、“左”、“右”、“前”、“后”、“背面”、“正面”、“竖直”、“水平”、“顶部”、“底部”、“内部”、“外部”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请实施例和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。相似的标号和字母在附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步定义和解释。同时,在本申请的描述中,术语“第一”、“第二”等仅用于区分描述,而不能理解为指示或暗示相对重要性。在本申请的描述中,“多种”或“多个”的含义是至少两种或两个,除非另有明确具体的限定。本申请的描述中,还需要说明的是,除非另有明确的规定和限定,“设置”、“安装”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接连接,也可以是通过中间媒介间接连接,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本申请中的具体含义。"Length", "width", "upper", "lower", "left", "right", "front", "rear", "back", "front", "vertical" may appear in the specification of this application "," "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the embodiments of the present application and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the application. Like numerals and letters refer to like items in the figures, so once an item is defined in one figure, no further definition and explanation are required in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of this application, "plurality" or "plurality" means at least two or two, unless expressly and specifically defined otherwise. In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, "arrangement", "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。权利要求书中所使用的术语不应理解为将发明限制于本说明书中所公开的特定实施例。因此,本申请的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. The terms used in the claims should not be construed to limit the invention to the specific embodiments disclosed in this specification. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
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