WO2020233282A1

WO2020233282A1 - Lens structure, light source structure, backlight module and display device

Info

Publication number: WO2020233282A1
Application number: PCT/CN2020/084493
Authority: WO
Inventors: 赵立锦; 王腾飞; 张宇; 谷晓俊; 孟龙; 杨亚明; 崔延镇
Original assignee: 京东方科技集团股份有限公司; 北京京东方显示技术有限公司
Priority date: 2019-05-22
Filing date: 2020-04-13
Publication date: 2020-11-26
Also published as: CN110161750B; CN110161750A

Abstract

A lens structure, a light source structure, a backlight module and a display device. The lens structure (100) comprises a first light incident surface (101) and a first light emitting surface (102) which are opposite to each other; the side of the first light incident surface (101) facing away from the first light emitting surface (102) is provided with a plurality of protruding structures (110); the end portions of the plurality of protruding structures (110) facing away from the first light emitting surface (102) are located within a first curved surface (111), and at least a part of the first curved surface (111) is a concave surface recessed towards one side of the first light emitting surface (102) of the lens structure (100).

Description

透镜结构、光源结构、背光模组和显示装置Lens structure, light source structure, backlight module and display device

本申请要求于2019年5月22日提交的中国专利申请第201910430125.0的优先权，该中国专利申请的全文通过引用的方式结合于此以作为本申请的一部分。This application claims the priority of Chinese patent application No. 201910430125.0 filed on May 22, 2019. The full text of the Chinese patent application is incorporated herein by reference as a part of this application.

技术领域Technical field

本公开至少一个实施例涉及一种透镜结构、光源结构、背光模组和显示装置。At least one embodiment of the present disclosure relates to a lens structure, a light source structure, a backlight module, and a display device.

背景技术Background technique

随着科技的发展和社会的进步，电子显示产品在人们日常生活中的应用越来越广泛，相应地，人们对电子显示产品的性能的要求也越来越高。一些电子显示产品(例如液晶显示屏)需要背光模组来提供显示用的光，但是，当前的背光模组限于自身的设计结构，对光的利用率低，且出射光的均匀度差，从而影响显示效果，难以满足用户的需求。With the development of science and technology and the progress of society, electronic display products are used more and more widely in people's daily life. Accordingly, people have higher and higher requirements for the performance of electronic display products. Some electronic display products (such as liquid crystal displays) require a backlight module to provide display light. However, the current backlight module is limited to its own design structure, has a low utilization rate of light, and has poor light uniformity. Affect the display effect, it is difficult to meet the needs of users.

发明内容Summary of the invention

本公开至少一个实施例提供了一种透镜结构，该透镜结构包括相对设置的第一入光面和第一出光面，所述第一入光面的背离所述第一出光面的一侧上设置有多个凸起结构，所述多个凸起结构的背离所述第一出光面的端部位于第一曲面内，所述第一曲面的至少部分为向所述透镜结构的第一出光面一侧凹陷的凹面。At least one embodiment of the present disclosure provides a lens structure. The lens structure includes a first light-incident surface and a first light-emitting surface that are disposed oppositely. The first light-incident surface is on a side facing away from the first light-emitting surface. A plurality of convex structures are provided, the ends of the plurality of convex structures facing away from the first light-emitting surface are located in a first curved surface, and at least a part of the first curved surface is the first light emitting to the lens structure Concave surface with a depression on one side.

例如，在本公开至少一个实施例提供的透镜结构中，所述第一曲面包括第一子曲面和第二子曲面，所述第一子曲面位于所述第一曲面的中间区域，所述第二子曲面环绕所述第一子曲面，以及所述第一子曲面为向背离所述透镜结构的所述第一出光面所在侧凸出的凸面，所述第二子曲面为向所述透镜结构的所述第一出光面所在侧凹陷的凹面。For example, in the lens structure provided by at least one embodiment of the present disclosure, the first curved surface includes a first sub-curved surface and a second sub-curved surface, the first sub-curved surface is located in the middle area of the first curved surface, and the first curved surface Two sub-curved surfaces surround the first sub-curved surface, and the first sub-curved surface is a convex surface that protrudes away from the first light-emitting surface of the lens structure, and the second sub-curved surface is toward the lens The concave surface of the structure where the first light-emitting surface is located.

例如，在本公开至少一个实施例提供的透镜结构中，在与所述第一入光面至第一出光面的方向垂直的方向上，所述第一子曲面的形心至所述第一子曲面的边缘的距离为所述第一子曲面的形心至所述第二子曲面的远离所述第一子曲面的边缘的距离的1/6-1/3。For example, in the lens structure provided by at least one embodiment of the present disclosure, in a direction perpendicular to the direction from the first light-incident surface to the first light-emitting surface, the centroid of the first sub-curved surface is to the first The distance of the edge of the sub-curved surface is 1/6 to 1/3 of the distance from the centroid of the first sub-curved surface to the edge of the second sub-curved surface away from the first sub-curved surface.

例如，在本公开至少一个实施例提供的透镜结构中，所述凸面和所述凹面至少之一的形状为部分球冠面或部分抛物面。For example, in the lens structure provided by at least one embodiment of the present disclosure, the shape of at least one of the convex surface and the concave surface is a partial spherical crown surface or a partial parabolic surface.

例如，在本公开至少一个实施例提供的透镜结构中，所述第一曲面关于与沿所述第一入光面至所述第一出光面的方向平行的的一轴线中心对称，所述第一子曲面的形心位于所述轴线上。For example, in the lens structure provided by at least one embodiment of the present disclosure, the first curved surface is symmetrical about an axis parallel to the direction from the first light incident surface to the first light exit surface, and the first The centroid of a sub-curved surface is located on the axis.

例如，在本公开至少一个实施例提供的透镜结构中，所述第一子曲面的和所述第二子曲面的形状分别为不同的抛物面的一部分，所述第一子曲面和所述第二子曲面相交且二者的交界线位于第一平面内，所述第一平面与所述第一入光面至第一出光面的方向垂直，以及所述第一子曲面所在抛物面在所述交界线之内的部分与所述第二子曲面所在抛物面在所述交界线之内的部分关于所述第一平面对称。For example, in the lens structure provided by at least one embodiment of the present disclosure, the shapes of the first sub-curved surface and the second sub-curved surface are part of different parabolas, and the first sub-curved surface and the second sub-curved surface The sub-curved surfaces intersect and the boundary line between the two is located in a first plane, the first plane is perpendicular to the direction from the first light-incident surface to the first light-emitting surface, and the parabola where the first sub-curved surface is located is at the boundary The part within the line and the part of the parabola where the second sub-curved surface is located within the boundary line are symmetrical with respect to the first plane.

例如，在本公开至少一个实施例提供的透镜结构中，所述第一曲面在所述第一出光面上的正投影包括圆形、椭圆形和矩形之一。For example, in the lens structure provided by at least one embodiment of the present disclosure, the orthographic projection of the first curved surface on the first light-emitting surface includes one of a circle, an ellipse, and a rectangle.

例如，本公开至少一个实施例提供的透镜结构中还包括与沿所述第一入光面至所述第一出光面的方向平行的第一光轴，所述多个凸起结构包括关于所述第一光轴为中心对称的多对所述凸起结构。For example, the lens structure provided by at least one embodiment of the present disclosure further includes a first optical axis parallel to the direction from the first light-incident surface to the first light-emitting surface, and the plurality of convex structures include The first optical axis is a plurality of pairs of the convex structures with central symmetry.

例如，在本公开至少一个实施例提供的透镜结构中，所述多个凸起结构的平面形状为环形，以及所述多个凸起结构以所述第一光轴为中心为同心环形排布。For example, in the lens structure provided by at least one embodiment of the present disclosure, the planar shape of the plurality of convex structures is a ring, and the plurality of convex structures are arranged in a concentric ring with the first optical axis as the center .

例如，在本公开至少一个实施例提供的透镜结构中，相邻的所述多个凸起结构的与所述第一入光面共面的部分彼此连接。For example, in the lens structure provided by at least one embodiment of the present disclosure, the portions of the adjacent plurality of convex structures that are coplanar with the first light incident surface are connected to each other.

例如，在本公开至少一个实施例提供的透镜结构中，所述多个凸起结构的每个沿与所述第一光轴平行的方向的截面形状为三角形，所述多个凸起结构的每个包括与所述第一入光面共面的底面、面向所述第一光轴的第一侧表面和背离所述第一光轴的第二侧表面，所述第一侧表面和所述第二侧表面设置为使得从所述第一侧表面入射的光在所述第二侧表面全反射并射向所述底面，以及经由所述第一侧表面入射以及所述第二侧表面全反射的光与所述第一光轴基本平行。For example, in the lens structure provided by at least one embodiment of the present disclosure, the cross-sectional shape of each of the plurality of convex structures along a direction parallel to the first optical axis is a triangle, and the plurality of convex structures Each includes a bottom surface coplanar with the first light incident surface, a first side surface facing the first optical axis, and a second side surface facing away from the first optical axis. The first side surface and the The second side surface is configured such that light incident from the first side surface is totally reflected on the second side surface and directed toward the bottom surface, and incident through the first side surface and the second side surface The totally reflected light is substantially parallel to the first optical axis.

例如，在本公开至少一个实施例提供的透镜结构中，所述第一出光面为平面，并且与所述第一光轴垂直。For example, in the lens structure provided by at least one embodiment of the present disclosure, the first light-emitting surface is a plane and is perpendicular to the first optical axis.

例如，在本公开至少一个实施例提供的透镜结构中，所述多个凸起结构的每个在所述第一出光面上的正投影的宽度相等。For example, in the lens structure provided by at least one embodiment of the present disclosure, the width of the orthographic projection of each of the plurality of convex structures on the first light-emitting surface is equal.

本公开至少一个实施例提供一种光源结构，该光源结构包括光源以及上述任一实施例中的透镜结构，所述透镜结构的第一入光面面向所述光源。At least one embodiment of the present disclosure provides a light source structure. The light source structure includes a light source and the lens structure in any of the foregoing embodiments, and a first light incident surface of the lens structure faces the light source.

例如，在本公开至少一个实施例提供的光源结构中，所述透镜结构为第一透镜，所述光源包括发光体和第二透镜，所述第二透镜位于所述发光体和所述第一透镜之间，所述第二透镜具有相对的第二入光面和第二出光面，所述第二入光面面向所述光源，所述第二出光面面向所述第一透镜，并且所述第一入光面为凹面，所述第二入光面为凸面。For example, in the light source structure provided by at least one embodiment of the present disclosure, the lens structure is a first lens, the light source includes a luminous body and a second lens, and the second lens is located between the luminous body and the first lens. Between the lenses, the second lens has a second light entrance surface and a second light exit surface opposite to each other, the second light entrance surface faces the light source, and the second light exit surface faces the first lens. The first light incident surface is a concave surface, and the second light incident surface is a convex surface.

例如，在本公开至少一个实施例提供的光源结构中，所述第二入光面为部分球冠面，所述发光***于所述部分球冠面所在的球面的球心。For example, in the light source structure provided by at least one embodiment of the present disclosure, the second light incident surface is a partial spherical crown surface, and the luminous body is located at the center of the spherical surface where the partial spherical crown surface is located.

例如，在本公开至少一个实施例提供的光源结构中，所述第二入光面配置为使得由所述发光体射入所述第二透镜且从所述第二入光面射出的光，在所述第一透镜的所述多个凸起结构的每个上的光强度相等，所述光强度为经由所述多个凸起结构调整而转换为具有准直方向的光的光强度。For example, in the light source structure provided by at least one embodiment of the present disclosure, the second light-incident surface is configured such that the light emitted from the luminous body enters the second lens and is emitted from the second light-incident surface, The light intensity on each of the plurality of convex structures of the first lens is equal, and the light intensity is the light intensity converted into light having a collimated direction through adjustment of the plurality of convex structures.

本公开至少一个实施例提供一种背光模组，该背光模组包括前述任一实施例中的光源结构。At least one embodiment of the present disclosure provides a backlight module including the light source structure in any of the foregoing embodiments.

例如，在本公开至少一个实施例提供的背光模组中，所述光源结构设置为多个且在所述透镜结构的第一入光面至第一出光面的方向垂直的平面上阵列排布。For example, in the backlight module provided by at least one embodiment of the present disclosure, the light source structure is provided in multiples and arranged in an array on a plane perpendicular to the direction from the first light incident surface to the first light output surface of the lens structure .

本公开至少一个实施例提供一种显示装置，该显示装置包括显示面板以及上述任一实施例中的背光模组，所述显示面板包括显示侧和背侧，所述背光模组位于所述显示面板的背侧并与所述显示面板重叠。At least one embodiment of the present disclosure provides a display device. The display device includes a display panel and the backlight module in any of the above embodiments. The display panel includes a display side and a back side, and the backlight module is located on the display The back side of the panel overlaps the display panel.

附图说明Description of the drawings

为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings of the embodiments. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limit the present disclosure. .

图1A为本公开一些实施例提供的一种透镜结构的截面图；1A is a cross-sectional view of a lens structure provided by some embodiments of the present disclosure;

图1B为图1A所示的透镜结构的工作原理示意图；FIG. 1B is a schematic diagram of the working principle of the lens structure shown in FIG. 1A;

图1C为图1A所示的透镜结构的部分凸起结构的平面分布示意图；FIG. 1C is a schematic plan view of a partial convex structure of the lens structure shown in FIG. 1A;

图1D为图1B所示透镜结构的凸起结构的工作原理示意图；FIG. 1D is a schematic diagram of the working principle of the convex structure of the lens structure shown in FIG. 1B;

图2为本公开一些实施例提供的另一种透镜结构的截面图；2 is a cross-sectional view of another lens structure provided by some embodiments of the disclosure;

图3A为本公开一些实施例提供的一种光源结构的截面图；3A is a cross-sectional view of a light source structure provided by some embodiments of the present disclosure;

图3B为图3A所示的光源结构的工作原理示意图；3B is a schematic diagram of the working principle of the light source structure shown in FIG. 3A;

图4为本公开一些实施例提供的一种背光模组的截面图；4 is a cross-sectional view of a backlight module provided by some embodiments of the disclosure;

图5为本公开一些实施例提供的另一种背光模组的截面图；以及FIG. 5 is a cross-sectional view of another backlight module provided by some embodiments of the disclosure; and

图6为本公开一些实施例提供的一种显示装置的截面图。FIG. 6 is a cross-sectional view of a display device provided by some embodiments of the present disclosure.

具体实施方式Detailed ways

为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the protection scope of the present disclosure.

除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity, or importance, but are only used to distinguish different components. "Include" or "include" and other similar words mean that the element or item appearing before the word encompasses the element or item listed after the word and its equivalents, but does not exclude other elements or items. Similar words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

通常，显示装置的背光模组需要出射大致准直的光线(基本为平行光束)以用于显示。例如，对于点光源，可以使用光学准直器使得点光源发出光线趋向于准直。例如，光学准直器可以为采用菲涅尔透镜进行二次配光的准直器，或者，光学准直器可以为利用抛物面形全内反射进行二次配光的准直器。采用菲涅尔透镜将点光源发出的光的方向调整为准直以作为背光，光的能量损失较大，导致出射光的亮度低，同时由于菲涅尔透镜固有的光学特性(例如比较大的F数和负色散系数)，会产生聚焦误差，产生的杂散光很多。F数为菲涅尔透镜的焦距与直径之比。利用抛物面形全内反射将点光源发出的光的方向调整为准直以作为背光，则会使得背光模组的体积和重量比较大。Generally, the backlight module of the display device needs to emit roughly collimated light (basically parallel light beams) for display. For example, for a point light source, an optical collimator can be used to make the light emitted by the point light source tend to be collimated. For example, the optical collimator may be a collimator that uses a Fresnel lens for secondary light distribution, or the optical collimator may be a collimator that uses parabolic total internal reflection for secondary light distribution. The Fresnel lens is used to adjust the direction of the light emitted by the point light source to be used as a backlight. The light energy loss is large, resulting in low brightness of the emitted light. At the same time, due to the inherent optical characteristics of the Fresnel lens (for example, relatively large F-number and negative dispersion coefficient), will produce focus error, and produce a lot of stray light. The F number is the ratio of the focal length to the diameter of the Fresnel lens. Using parabolic total internal reflection to adjust the direction of the light emitted by the point light source to be collimated as a backlight will make the volume and weight of the backlight module relatively large.

因此，上述的光学准直器严重限制了背光模组的应用能力，例如，因体积、重量、功耗太大而难以应用于微型液晶显示器，例如，对于用于机载头盔显示***的微型液晶显示器，需要透视式显示又需要很高的亮度，而且需要低功耗，如果背光模组的体积、重量太大，那么附加的一些结构(例如固定结构等)不光会增加负重，而且会影响视线，而且，如果将点光源的发光亮度设计为较大以满足对高亮度的要求，功耗也将会非常大。Therefore, the above-mentioned optical collimator severely limits the application capability of the backlight module. For example, it is difficult to be applied to the micro liquid crystal display due to the large size, weight, and power consumption. For example, for the micro liquid crystal display used in the airborne helmet display system. The display requires a see-through display, high brightness, and low power consumption. If the size and weight of the backlight module are too large, some additional structures (such as fixed structures) will not only increase the load, but also affect the line of sight And, if the luminous brightness of the point light source is designed to be large to meet the requirements for high brightness, the power consumption will also be very large.

本公开至少一个实施例提供了一种透镜结构、光源结构、背光模组和显示装置，该透镜结构包括相对设置的第一入光面和第一出光面，第一入光面的背离第一出光面的一侧设置有多个凸起结构，多个凸起结构的背离第一出光面的端部位于第一曲面内，第一曲面的至少部分为向透镜结构的第一出光面一侧凹陷的凹面。对于从透镜结构的第一入光面一侧射来的光线，该凹面的设计可以提高光的入射量，而且使得透镜结构的平面尺寸(例如长宽或者直径)不受限制，而且可以使得透镜结构的焦距较小，使得透镜结构的整体高度(例如图3B中的H)较小，有利于减小透镜结构的设计厚度，从而使得透镜结构的体积和重量可以比较小；此外，入射的光线被凸起结构导入透镜结构，可以实现对光的方向的调节，相应地透镜结构中的杂散光少，那么可以不需要像当前的菲涅尔透镜一样在出光面(对应于本实施例的透镜结构的第一出光面)调节光的方向，使得从第一出光面出射的杂散光的量少。本公开至少一实施例中的透镜结构具有上述技术效果的工作原理，可以参见下述实施例中的相关说明，在此不做赘述。At least one embodiment of the present disclosure provides a lens structure, a light source structure, a backlight module, and a display device. The lens structure includes a first light-incident surface and a first light-exit surface that are arranged opposite to each other. One side of the light-emitting surface is provided with a plurality of convex structures, the ends of the plurality of convex structures facing away from the first light-emitting surface are located in the first curved surface, and at least part of the first curved surface is toward the side of the first light-emitting surface of the lens structure Depressed concave surface. For the light emitted from the side of the first light-incident surface of the lens structure, the design of the concave surface can increase the amount of light incident, and make the plane size of the lens structure (such as length and width or diameter) not limited, and can make the lens The focal length of the structure is small, so that the overall height of the lens structure (for example, H in Figure 3B) is small, which is beneficial to reduce the design thickness of the lens structure, so that the volume and weight of the lens structure can be relatively small; in addition, the incident light The convex structure is introduced into the lens structure to realize the adjustment of the light direction. Correspondingly, there is less stray light in the lens structure, so there is no need to be on the light-emitting surface like the current Fresnel lens (corresponding to the lens of this embodiment). The first light-emitting surface of the structure adjusts the direction of light so that the amount of stray light emitted from the first light-emitting surface is small. For the working principle of the lens structure in at least one embodiment of the present disclosure having the above technical effects, reference may be made to the related description in the following embodiments, which will not be repeated here.

下面，结合附图对根据本公开至少一个实施例中的透镜结构、光源结构、背光模组和显示装置进行说明。Hereinafter, the lens structure, the light source structure, the backlight module, and the display device in at least one embodiment of the present disclosure will be described with reference to the accompanying drawings.

本公开至少一个实施例提供一种透镜结构，图1A为本公开一些实施例提供的一种透镜结构的截面图。如图1A所示，透镜结构100包括相对设置的第一入光面101和第一出光面102，第一入光面101的背离第一出光面102的一侧设置有多个凸起结构110，多个凸起结构110的背离第一出光面102的端部1101(即尖端，可参见图1D)位于第一曲面103内，第一曲面103的部分为向透镜结构的第一出光面102一侧凹陷的凹面。例如，如图1A所示，透镜结构100的第一入光面101的形状可以与第一曲面103的形状相似或者大致相似，从而便于在第一入光面101上形成限定第一曲面103的凸起结构110。需要说明的是，第一曲面103为虚设的面，为多个凸起结构110的背离第一出光面102的端部所构成的包络面。此外，第一入光面101的至少部分可以为虚设的面，例如第一入光面101的设置有凸起结构110的部分与凸起结构110共面，该部分可以参见下图1D所示的凸起结构110的底面113。例如，在第一入光面101的全部区域都设置有凸起结构110的情况下，第一入光面101为虚设的面。At least one embodiment of the present disclosure provides a lens structure, and FIG. 1A is a cross-sectional view of a lens structure provided by some embodiments of the present disclosure. As shown in FIG. 1A, the lens structure 100 includes a first light-incident surface 101 and a first light-emitting surface 102 opposite to each other. A side of the first light-incident surface 101 facing away from the first light-emitting surface 102 is provided with a plurality of convex structures 110. , The end portion 1101 of the plurality of convex structures 110 facing away from the first light-emitting surface 102 (that is, the tip, see FIG. 1D) is located in the first curved surface 103, and the portion of the first curved surface 103 is toward the first light-emitting surface 102 of the lens structure A concave surface that is sunken on one side. For example, as shown in FIG. 1A, the shape of the first light-incident surface 101 of the lens structure 100 may be similar or substantially similar to the shape of the first curved surface 103, so as to facilitate the formation of the first curved surface 103 on the first light-incident surface 101 Protruding structure 110. It should be noted that the first curved surface 103 is a dummy surface, which is an envelope surface formed by the ends of the plurality of protruding structures 110 facing away from the first light-emitting surface 102. In addition, at least part of the first light-incident surface 101 may be a dummy surface, for example, a portion of the first light-incident surface 101 where the convex structure 110 is provided is coplanar with the convex structure 110. This part can be seen as shown in FIG. 1D below. The bottom surface 113 of the raised structure 110. For example, in the case where all areas of the first light incident surface 101 are provided with the convex structure 110, the first light incident surface 101 is a dummy surface.

图1B为图1A所示的透镜结构的工作原理示意图，其示出了透镜结构与点光源的一种位置关系。示例性的，如图1B所示，位置F处设置有点光源(不考虑其体积)，平面P1与第一入光面101至第一出光面102的方向垂直(即与X轴方向平行)，透镜结构100的第一曲面103的边缘位于平面P1内，F位于平面P1上。如此，点光源的向平面P1的面向透镜结构100的一侧出射的光线可以全部射入透镜结构100中，即，在该情况下，透镜结构100可以接收点光源在180度角度范围内出射的光线，对光线的接收率大。此外，如图1B所示，即便透镜结构100的体积等比例缩小，也不影响由点光源射入透镜结构100的光的量，据此，可以减小透镜结构的设计体积，有利于透镜结构以及包括该透镜结构的光源结构、背光模组的小型化设计。Fig. 1B is a schematic diagram of the working principle of the lens structure shown in Fig. 1A, which shows a positional relationship between the lens structure and a point light source. Exemplarily, as shown in FIG. 1B, a point light source is set at position F (regardless of its volume), and the plane P1 is perpendicular to the direction from the first light incident surface 101 to the first light output surface 102 (that is, parallel to the X axis direction), The edge of the first curved surface 103 of the lens structure 100 is located in the plane P1, and the F is located on the plane P1. In this way, the light emitted from the point light source toward the side of the plane P1 facing the lens structure 100 can all enter the lens structure 100, that is, in this case, the lens structure 100 can receive the light emitted from the point light source within a 180 degree angle range. Light, the acceptance rate of light is large. In addition, as shown in FIG. 1B, even if the volume of the lens structure 100 is reduced in proportion, the amount of light emitted from the point light source into the lens structure 100 will not be affected. Accordingly, the design volume of the lens structure can be reduced, which is beneficial to the lens structure. And the miniaturization design of the light source structure and the backlight module including the lens structure.

例如，在本公开至少一个实施例中，点光源可以位于第一曲面103的边缘所在面和第一曲面103之间。示例性的，对于图1B所示的透镜结构，可以将点F沿Z轴移动至平面P1和第一曲面103之间，如此，透镜结构100可以接收点光源在大于180度角度范围内出射的光线，从而进一步提高射入透镜结构100的光的量。For example, in at least one embodiment of the present disclosure, the point light source may be located between the surface where the edge of the first curved surface 103 is located and the first curved surface 103. Exemplarily, for the lens structure shown in FIG. 1B, the point F can be moved along the Z axis between the plane P1 and the first curved surface 103. In this way, the lens structure 100 can receive the point light source emitted in an angle range greater than 180 degrees. Therefore, the amount of light entering the lens structure 100 is further increased.

在本公开至少一个实施例中，透镜结构的凸起结构限定的第一曲面可以全部为凹面，或者第一曲面的一部分为凹面。第一曲面的形状影响光线在透镜结构中的分布，可以根据实际需要，选择将第一曲面的全部或者一部分设计为凹面。In at least one embodiment of the present disclosure, the first curved surface defined by the convex structure of the lens structure may be all concave, or a part of the first curved surface may be concave. The shape of the first curved surface affects the distribution of light in the lens structure. According to actual needs, all or part of the first curved surface can be selected as a concave surface.

例如，在本公开一些实施例提供的透镜结构中，如图1A和图1B所示，第一曲面103包括第一子曲面1031和第二子曲面1032。第一子曲面1031位于第一曲面103的中间区域，第二子曲面1032环绕第一子曲面1031。第一子曲面1031为向背离透镜结构100的第一出光面102所在侧凸出的凸面，第二子曲面1032为向透镜结构100的第一出光面102所在侧凹陷的凹面。例如，第一子曲面1031与位置F处的点光源相对设置。为了提高位置F处的点光源的射向透镜结构100的中间区域的光线的准直程度，第一子曲面1031设计为凸面使得透镜结构100的与该第一子曲面对应的部分可以等效于凸透镜，从而对入射的光线进行汇聚，并使得被汇聚的光线更加准直。For example, in the lens structure provided by some embodiments of the present disclosure, as shown in FIGS. 1A and 1B, the first curved surface 103 includes a first sub-curved surface 1031 and a second sub-curved surface 1032. The first sub-curved surface 1031 is located in the middle area of the first curved surface 103, and the second sub-curved surface 1032 surrounds the first sub-curved surface 1031. The first sub-curved surface 1031 is a convex surface facing away from the side where the first light-emitting surface 102 of the lens structure 100 is located, and the second sub-curved surface 1032 is a concave surface that is recessed toward the side where the first light-emitting surface 102 of the lens structure 100 is located. For example, the first sub-curved surface 1031 is opposite to the point light source at the position F. In order to improve the degree of collimation of the light from the point light source at the position F towards the middle area of the lens structure 100, the first sub-curved surface 1031 is designed as a convex surface so that the portion of the lens structure 100 corresponding to the first sub-curved surface can be equivalent to Convex lens, so as to converge the incident light, and make the concentrated light more collimated.

例如，在本公开至少一个实施例中，“准直”为光的方向与透镜结构的第一出光面所在面垂直(也包括基本垂直)，例如，与透镜结构的光轴(例如下述实施例中的第一光轴)平行(也包括基本平行)。For example, in at least one embodiment of the present disclosure, "collimation" means that the direction of light is perpendicular to the surface where the first light-emitting surface of the lens structure is (including substantially perpendicular), for example, to the optical axis of the lens structure (for example, the following implementation The first optical axis in the example) is parallel (including substantially parallel).

例如，在本公开至少一个实施例提供的透镜结构中，在第一曲面包括第一子曲面(凸面)和第二子曲面(凹面)的情况下，凸面和凹面至少之一的形状为部分球冠面或部分抛物面。如图1A所示，第一子曲面1031和第二子曲面1032的形状为不同的抛物面的一部分，第一子曲面1031所在的抛物面的开口方向和第二子曲面1032所在的抛物面的开口方向相反。For example, in the lens structure provided by at least one embodiment of the present disclosure, when the first curved surface includes a first sub-curved surface (convex surface) and a second sub-curved surface (concave surface), the shape of at least one of the convex surface and the concave surface is a partial sphere. Crown or partly parabolic. As shown in FIG. 1A, the shapes of the first sub-curved surface 1031 and the second sub-curved surface 1032 are parts of different parabolas, and the opening direction of the paraboloid where the first sub-curved surface 1031 is located is opposite to the opening direction of the paraboloid where the second sub-curved surface 1032 is located. .

例如，在本公开至少一个实施例提供的透镜结构中，在与第一入光面至第一出光面的方向垂直的方向上，第一子曲面的形心至第一子曲面的边缘的距离为第一子曲面的形心至第二子曲面的远离第一子曲面的边缘的距离的1/6～1/3，例如1/4、1/5等。示例性的，如图1A所示，第一子曲面1031的形心位于入光侧S1(即第一入光面101所在侧)至出光侧S2(即第一出光面102所在侧)的轴线(例如，与沿第一入光面101至第一出光面 102的方向平行)上，第一子曲面1031的形心至第一子曲面1031的边缘的距离为d1，第一子曲1031的形心至第二子曲面1032的外边缘的距离的d2，d1/d2的范围约为1/6～1/3。又例如，d1/d2的取值可以约为1/4、1/5等。这里，“约”字表示，d1/d2的数值可以在其例如±25％(再例如±10％)范围内变化。在该数值范围内，经过透镜结构调节的光的准直程度高，出光均匀，且不影响由凹面设计(第二子曲面1032)带来的提高入光量、减小设计体积等技术效果。例如，上述入光侧S1至出光侧S2的轴线可以与透镜结构100的第一光轴11重合。For example, in the lens structure provided by at least one embodiment of the present disclosure, in a direction perpendicular to the direction from the first light incident surface to the first light output surface, the distance from the centroid of the first sub-curved surface to the edge of the first sub-curved surface is It is 1/6 to 1/3 of the distance from the centroid of the first sub-curved surface to the edge of the second sub-curved surface away from the first sub-curved surface, such as 1/4, 1/5, etc. Exemplarily, as shown in FIG. 1A, the centroid of the first sub-curved surface 1031 is located on the axis from the light incident side S1 (that is, the side where the first light incident surface 101 is) to the light exit side S2 (that is, the side where the first light output surface 102 is) (For example, parallel to the direction along the first light-incident surface 101 to the first light-emitting surface 102), the distance from the centroid of the first sub-curved surface 1031 to the edge of the first sub-curved surface 1031 is d1, and the distance of the first sub-curve 1031 The range of the distance d2, d1/d2 from the centroid to the outer edge of the second sub-curved surface 1032 is about 1/6 to 1/3. For another example, the value of d1/d2 can be about 1/4, 1/5, and so on. Here, the word "about" means that the value of d1/d2 can be varied within the range of, for example, ±25% (for example, ±10%). Within this value range, the degree of collimation of the light adjusted by the lens structure is high, the light output is uniform, and the concave design (second sub-curved surface 1032) brings technical effects such as increasing the amount of light and reducing the design volume. For example, the axis from the light entrance side S1 to the light exit side S2 may coincide with the first optical axis 11 of the lens structure 100.

例如，在本公开另一些实施例提供的透镜结构中，图2为本公开一些实施例提供的另一种透镜结构的截面图。如图2所示，透镜结构100a包括相对设置的第一入光面101a和第一出光面102a，第一入光面101a的背离第一出光面102a的一侧设置有多个凸起结构110a。透镜结构100a的由多个凸起结构110a限定的第一曲面103a为凹面。例如，透镜结构100a的第一入光面101a的形状可以与第一曲面103a的形状相似或者大致相似,从而便于在第一入光面101a上形成限定第一曲面103a的凸起结构110a。需要说明的是，第一曲面103a为虚设的面，为多个凸起结构110a的背离第一出光面102的端部所构成的包络面。第一入光面101a也为虚设的面，例如第一入光面101a与凸起结构110a共面。例如，在该实施例中，第一曲面103a的形状为部分球冠面或部分抛物面。For example, among the lens structures provided by other embodiments of the present disclosure, FIG. 2 is a cross-sectional view of another lens structure provided by some embodiments of the present disclosure. As shown in FIG. 2, the lens structure 100a includes a first light-incident surface 101a and a first light-emitting surface 102a disposed oppositely, and a side of the first light-incident surface 101a facing away from the first light-emitting surface 102a is provided with a plurality of convex structures 110a. . The first curved surface 103a of the lens structure 100a defined by the plurality of convex structures 110a is a concave surface. For example, the shape of the first light incident surface 101a of the lens structure 100a may be similar or substantially similar to the shape of the first curved surface 103a, so as to facilitate the formation of the convex structure 110a defining the first curved surface 103a on the first light incident surface 101a. It should be noted that the first curved surface 103a is a dummy surface, and is an envelope surface formed by the ends of the plurality of protruding structures 110a away from the first light-emitting surface 102. The first light incident surface 101a is also a dummy surface, for example, the first light incident surface 101a is coplanar with the convex structure 110a. For example, in this embodiment, the shape of the first curved surface 103a is a partial spherical crown surface or a partial parabolic surface.

下面，以透镜结构的第一曲面为图1A和图1B所示的包括凹面和凸面为例，对本公开下述至少一个实施例中的透镜结构、光源结构、背光模组和显示装置进行说明。Hereinafter, taking the first curved surface of the lens structure including the concave surface and the convex surface shown in FIGS. 1A and 1B as an example, the lens structure, light source structure, backlight module, and display device in at least one embodiment of the present disclosure will be described below.

例如，在本公开至少一个实施例提供的透镜结构中，第一曲面为关于沿第一入光面至第一出光面的方向平行的一轴线中心对称，例如，该轴线为透镜结构的第一光轴。示例性的，如图1A所示，透镜结构100具有从第一入光面101所在侧S1至第一出光面102所在侧S2的轴线11(例如下述实施例中的第一光轴11)。例如，第一曲面103关于轴线11为中心对称，并且在图1A所示的截面(X-Z确定的平面)内，轴线11同时也为第一曲面103的对称轴，其中轴线11位于该截面内，即，第一曲面103的位于该截面内的部分(线)关于轴线11轴对称，在该情况下，第一子曲面1031和第二子曲面1032都关于轴线11中心对称。如此，有利于光线射入透镜结构100后分布均匀，即有利于从第一出光面102出射的光线分布均匀。For example, in the lens structure provided by at least one embodiment of the present disclosure, the first curved surface is symmetrical about an axis parallel to the direction from the first light-incident surface to the first light-emitting surface. For example, the axis is the first axis of the lens structure. Optical axis. Exemplarily, as shown in FIG. 1A, the lens structure 100 has an axis 11 from the side S1 where the first light incident surface 101 is located to the side S2 where the first light exit surface 102 is located (for example, the first optical axis 11 in the following embodiments) . For example, the first curved surface 103 is centrally symmetrical about the axis 11, and in the cross section shown in FIG. 1A (the plane determined by XZ), the axis 11 is also the symmetry axis of the first curved surface 103, and the axis 11 is located in the cross section. That is, the part (line) of the first curved surface 103 located in the cross section is axisymmetric about the axis 11, in this case, both the first sub-curved surface 1031 and the second sub-curved surface 1032 are center-symmetric about the axis 11. In this way, it is advantageous for the light to be evenly distributed after entering the lens structure 100, that is, it is advantageous for the light to be emitted from the first light-emitting surface 102 to be evenly distributed.

例如，在本公开至少一个实施例提供的透镜结构中，第一子曲面的和第二子曲面的形状分别为不同的抛物面的一部分，第一子曲面和第二子曲面相交且二者的交界线位于第一平面内，第一平面与第一入光面至第一出光面的方向垂直，以及第一子曲面所在抛物线在交界线之内的部分与第二子曲面所在抛物面在交界线之内的部分关于第一平面对称。示例性的，如图1A所示，例如，第一平面10为虚设的平面并与第一入光面101至第一出光面102的方向(即，与轴线11)垂直，第一子曲面1031和第二子曲面1032的交界线M1位于第一平面10内，第一子曲面1031和第二子曲面1032分别为两个抛物面的一部分。例如，第一子曲面1031所在的抛物面与第二子曲面1032所在的抛物面大小相等且开口方向相反。例如，第一子曲面1031所在抛物面在交界线M1之内的部分以及第二子曲面1032所在抛物面在交界线M1之内的部分(或者，第一子曲面1031所在抛物面在交界线M1之外的部分以及第二子曲面1032所在抛物面在交界线M1之外的部分)分别位于第一平面10两侧(即图中的上下两侧)且关于第一平面10对称。For example, in the lens structure provided by at least one embodiment of the present disclosure, the shapes of the first sub-curved surface and the second sub-curved surface are part of different paraboloids, and the first sub-curved surface and the second sub-curved surface intersect and the boundary between the two The line is located in the first plane, the first plane is perpendicular to the direction from the first light-incident surface to the first light-emitting surface, and the part of the parabola where the first sub-curved surface is located within the boundary line is between the parabola where the second sub-curved surface is located The inner part is symmetrical about the first plane. Exemplarily, as shown in FIG. 1A, for example, the first plane 10 is a virtual plane and is perpendicular to the direction from the first light incident surface 101 to the first light output surface 102 (ie, to the axis 11), and the first sub-curved surface 1031 The boundary line M1 with the second sub-curved surface 1032 is located in the first plane 10, and the first sub-curved surface 1031 and the second sub-curved surface 1032 are respectively part of two parabolas. For example, the paraboloid where the first sub-curved surface 1031 is located is the same size as the paraboloid where the second sub-curved surface 1032 is located, and the opening directions are opposite. For example, the part of the parabola where the first sub-curved surface 1031 is located within the boundary line M1 and the part of the parabola where the second sub-curved surface 1032 is located within the boundary line M1 (or the parabola where the first sub-curved surface 1031 is located outside the boundary line M1) The part and the part of the parabola where the second sub-curved surface 1032 is located outside the boundary line M1) are respectively located on both sides of the first plane 10 (ie, the upper and lower sides in the figure) and are symmetrical about the first plane 10.

例如，在本公开至少一个实施例提供的透镜结构中，第一曲面在第一出光面上的正投影包括圆形、椭圆形和矩形之一。如此，有利于光线射入透镜结构后分布均匀，即有利于从第一出光面出射的光线分布均匀。例如，在该正投影为矩形的情况下，在将该透镜结构用于阵列排布时，有利于透镜结构之间彼此拼接，即，相邻透镜结构之间的间隙小，该情况可以参见下述如图5所示实施例中的背光模组，该模组包括阵列排布的光源结构，光源结构包括该透镜结构。例如，该矩形可以为正方形。例如，该正投影还可以为正多边形例如正六边形或其它形状。For example, in the lens structure provided by at least one embodiment of the present disclosure, the orthographic projection of the first curved surface on the first light-emitting surface includes one of a circle, an ellipse, and a rectangle. In this way, it is advantageous for the light to be evenly distributed after entering the lens structure, that is, it is advantageous for the light to be distributed uniformly from the first light-emitting surface. For example, when the orthographic projection is rectangular, when the lens structure is used for array arrangement, it is advantageous for the lens structures to be spliced with each other, that is, the gap between adjacent lens structures is small. For this situation, see below Described as the backlight module in the embodiment shown in FIG. 5, the module includes a light source structure arranged in an array, and the light source structure includes the lens structure. For example, the rectangle may be a square. For example, the orthographic projection may also be a regular polygon such as a regular hexagon or other shapes.

下面，以第一曲面在第一出光面上的正投影为圆形为例，对本公开下述至少一个实施例中的透镜结构、光源结构、背光模组和显示装置进行说明。Hereinafter, taking the orthographic projection of the first curved surface on the first light-emitting surface as a circle as an example, the lens structure, light source structure, backlight module and display device in at least one embodiment of the present disclosure will be described below.

例如，本公开至少一个实施例提供的透镜结构中还包括与沿第一入光面至第一出光面的方向平行的第一光轴，多个凸起结构包括关于第一光轴为中心对称的多对凸起结构。示例性的，如图1A所示，透镜结构100包括第一光轴11(也即轴线11)，第一曲面103的形心(例如圆心)位于第一光轴11上，在第一光轴11的两侧，凸起结构110的数量相等且一一对应，对应的凸起结构110的形状、位置关于第一光轴11中心对称。例如，第一曲面103的位于图1A所示的截面(X-Z确定的平面，第一光轴11位于该平面内)内的部分(线)，关于第一光轴11为轴对称，而且，第一曲面103的位于另一垂直于X-Z平面且包括第一光轴11的截面(未示出，为Y-Z确定的平面)内的部分(线)。如此，有利于光线射入透镜结构100后分布均匀，即有利于从第一出光面102出射的光线分布均匀。For example, the lens structure provided by at least one embodiment of the present disclosure further includes a first optical axis parallel to the direction from the first light-incident surface to the first light-emitting surface, and the plurality of convex structures includes a center symmetrical about the first optical axis. Many pairs of raised structures. Exemplarily, as shown in FIG. 1A, the lens structure 100 includes a first optical axis 11 (that is, an axis 11), and the centroid (for example, the center of the circle) of the first curved surface 103 is located on the first optical axis 11, and On both sides of 11, the number of convex structures 110 is equal and corresponds one to one, and the shape and position of the corresponding convex structures 110 are symmetric about the center of the first optical axis 11. For example, the portion (line) of the first curved surface 103 located in the cross-section shown in FIG. 1A (the plane determined by XZ, the first optical axis 11 is located in the plane) is axisymmetric about the first optical axis 11, and the first A portion (line) of a curved surface 103 located in another cross section perpendicular to the XZ plane and including the first optical axis 11 (not shown, which is a plane defined by YZ). In this way, it is advantageous for the light to be evenly distributed after entering the lens structure 100, that is, it is advantageous for the light to be emitted from the first light-emitting surface 102 to be evenly distributed.

例如，在本公开至少一个实施例提供的透镜结构中，凸起结构的平面形状为环形，以及多个凸起结构以第一光轴为中心为同心环形排布。例如，多个凸起结构在第一出光面上的正投影为多个同心圆环。示例性的，由第一曲面的形心至边缘，多个凸起结构在第一出光面上的正投影可以如图1C所示，其中，区域1、2、3、5、6、7、8分别表示8个凸起结构110在第一出光面102上的正投影。如此，有利于光线射入透镜结构100后分布均匀，即有利于从第一出光面102出射的光线分布均匀。For example, in the lens structure provided by at least one embodiment of the present disclosure, the planar shape of the convex structure is a ring, and the plurality of convex structures are arranged in a concentric ring with the first optical axis as the center. For example, the orthographic projection of the plurality of convex structures on the first light-emitting surface is a plurality of concentric rings. Exemplarily, from the centroid to the edge of the first curved surface, the orthographic projection of the plurality of convex structures on the first light-emitting surface may be as shown in FIG. 1C, where

areas

1, 2, 3, 5, 6, 7, 8 respectively represents the orthographic projection of the eight convex structures 110 on the first light-emitting surface 102. In this way, it is advantageous for the light to be evenly distributed after entering the lens structure 100, that is, it is advantageous for the light to be emitted from the first light-emitting surface 102 to be evenly distributed.

例如，在本公开至少一个实施例提供的透镜结构中，如图1A和图1B所示，相邻凸起结构110的与第一入光面101共面的部分彼此连接。由于二者直接相接而不存在过渡的曲面部分，如此可以使得射入透镜结构100中的光线都需要被凸起结构110导入，以便于射入透镜结构的光的方向进行调节，减少产生杂散光的量。For example, in the lens structure provided by at least one embodiment of the present disclosure, as shown in FIG. 1A and FIG. 1B, the portions of adjacent convex structures 110 that are coplanar with the first light incident surface 101 are connected to each other. Since the two are directly connected and there is no transitional curved surface part, the light entering the lens structure 100 needs to be guided by the convex structure 110, so that the direction of the light entering the lens structure can be adjusted to reduce the generation of noise. The amount of astigmatism.

例如，在本公开至少一个实施例提供的透镜结构中，多个凸起结构的每个沿与第一光轴平行的方向的截面形状为三角形，凸起结构包括与第一入光面共面的底面、面向第一光轴的第一侧表面和背离第一光轴的第二侧表面，第一侧表面和第二侧表面设置为使得从第一侧表面入射的光在第二侧表面全反射并射向底面，以及经由第一侧表面入射以及第二侧表面全反射的光与第一光轴基本平行。示例性的，图1D为图1C所示的透镜结构沿M1-N1的截面，图1D示出了图1A中两个相邻的凸起结构110的三角形截面，该三角形截面所在面与第一光轴11平行，例如，该截面位于平面P2(图1C中所示)内，第一光轴11位于平面P2中。凸起结构110的折射率大于周围介质(例如空气或者低折射率胶层)的折射率，光线L1可以从第一侧表面111射入凸起结构110。在光线L1到达第二侧表面112时，该状态为从高折射率介质射向低折射率介质，通过设置第二侧表面112的倾角(例如与第一侧表面111的夹角)，可以使得光线L1在第二侧表面上的入射角大于或等于光线L1在第二侧表面112上的全反射临界角，从而使得光线L1在第二侧表面112上全反射。通过调节第一侧表面111和第二侧表面112的倾角，可以使得在第二侧表面112上全反射的光线L1的传播方向与第一光轴11基本平行，从而使得透镜结构100可以在第一出光面102出射准直光线。For example, in the lens structure provided by at least one embodiment of the present disclosure, the cross-sectional shape of each of the plurality of convex structures along a direction parallel to the first optical axis is a triangle, and the convex structures include coplanar with the first light incident surface. The bottom surface, the first side surface facing the first optical axis, and the second side surface facing away from the first optical axis, the first side surface and the second side surface are arranged such that light incident from the first side surface is on the second side surface The light which is totally reflected and directed to the bottom surface, and incident through the first side surface and totally reflected by the second side surface is substantially parallel to the first optical axis. Illustratively, FIG. 1D is a cross-section of the lens structure shown in FIG. 1C along M1-N1, and FIG. 1D shows a triangular cross-section of two adjacent convex structures 110 in FIG. 1A. The optical axis 11 is parallel, for example, the cross section is located in the plane P2 (shown in FIG. 1C), and the first optical axis 11 is located in the plane P2. The refractive index of the convex structure 110 is greater than the refractive index of the surrounding medium (for example, air or a low refractive index adhesive layer), and the light L1 can enter the convex structure 110 from the first side surface 111. When the light L1 reaches the second side surface 112, the state is from the high refractive index medium to the low refractive index medium. By setting the inclination angle of the second side surface 112 (for example, the angle with the first side surface 111), The incident angle of the light L1 on the second side surface is greater than or equal to the critical angle of total reflection of the light L1 on the second side surface 112, so that the light L1 is totally reflected on the second side surface 112. By adjusting the inclination angles of the first side surface 111 and the second side surface 112, the propagation direction of the light L1 totally reflected on the second side surface 112 can be substantially parallel to the first optical axis 11, so that the lens structure 100 can be positioned at the A light emitting surface 102 emits collimated light.

例如，在本公开至少一个实施例中，凸起结构与透镜结构的其它部分可以为一体化结构，即，凸起结构与透镜结构的其它部分之间没有界面，如图1D所示，底面113为虚设的面。如此，在第二侧表面112上反射的光在穿过底面113时，不会因穿透界面而产生部分反射、部分光损耗等，提高光的透过率，且不会因此产生杂散光。For example, in at least one embodiment of the present disclosure, the convex structure and other parts of the lens structure may be an integrated structure, that is, there is no interface between the convex structure and other parts of the lens structure, as shown in FIG. 1D, the bottom surface 113 It is a dummy face. In this way, when the light reflected on the second side surface 112 passes through the bottom surface 113, there is no partial reflection, partial light loss, etc. due to the penetration of the interface, which increases the light transmittance and does not generate stray light.

在本公开至少一个实施例中，凸起结构的沿与第一光轴平行的方向的截面形状可以不限于上述的三角形，例如，可以以该三角形为基础进行变形。例如，以如图1D所示的凸起结构110为例，第二侧表面112可以设置为弧形，以使得从不同角度射入的光线被第二侧表面112反射后都具有相同的传播方向，从而提高出射光线的准直程度。例如，该三角形的与底面113相对的顶角可以根据需要进行切割，例如沿着入射的某一条光线的光路进行切割，例如该三角形切割后可以为四边形。如此，在第一侧表面111为斜面、第一侧表面111所在面与出射光的准直方向相交的情况下，可以防止从顶角处射入的光线在第二侧表面112上反射后从第一侧表面111射出，并且防止部分光线在凸起结构110内多次反射而造成光损失或者产生杂散光。In at least one embodiment of the present disclosure, the cross-sectional shape of the convex structure along the direction parallel to the first optical axis may not be limited to the above-mentioned triangle, for example, it may be deformed based on the triangle. For example, taking the convex structure 110 shown in FIG. 1D as an example, the second side surface 112 may be set in an arc shape, so that light rays incident from different angles are reflected by the second side surface 112 and all have the same propagation direction. , Thereby improving the degree of collimation of the emitted light. For example, the top angle of the triangle opposite to the bottom surface 113 can be cut as needed, for example, along the light path of a certain incident light, for example, the triangle can be a quadrilateral after being cut. In this way, when the first side surface 111 is an inclined surface and the surface where the first side surface 111 is located intersects the collimation direction of the emitted light, it is possible to prevent the light incident from the top corner from reflecting on the second side surface 112 The first side surface 111 is emitted, and part of the light is prevented from being reflected multiple times in the convex structure 110 to cause light loss or stray light.

例如，在本公开至少一个实施例提供的透镜结构中，如图1A所示，第一出光面102为平面，并且与第一光轴11垂直。如此，可以使得在光线以垂直于第一出光面102的方向出射，减少光出射时的损失，并减少杂散光，而且该设计还可以减小因路径差异造成的光损失不均而导致的出光不均匀，例如，在透镜结构的关于第一光轴11对称的位置，光线从射入透镜结构100开始至从透镜结构100出射的光线的路径是相等的，从而光损失也相等。For example, in the lens structure provided by at least one embodiment of the present disclosure, as shown in FIG. 1A, the first light-emitting surface 102 is a plane and is perpendicular to the first optical axis 11. In this way, the light can be emitted in a direction perpendicular to the first light-emitting surface 102, reducing the loss of light exiting, and reducing stray light, and the design can also reduce the light-emitting caused by uneven light loss caused by path differences. Non-uniformity, for example, at a symmetrical position of the lens structure about the first optical axis 11, the path of light from entering the lens structure 100 to the light exiting from the lens structure 100 is equal, so the light loss is also equal.

例如，在本公开一些实施例提供的透镜结构中，各个凸起结构在第一出光面上的正投影的宽度相等。示例性的，如图1A和图1C所示，区域1、2、3、5、6、7、8分别表示8个凸起结构110在第一出光面102上的正投影，R1、R2和R3分别代表彼此相邻的第3、第4、第5个凸起结构110的外边缘(远离第一光轴11的边缘)至第一光轴11的半径，并且R3-R2＝R2-R1。For example, in the lens structure provided by some embodiments of the present disclosure, the width of the orthographic projection of each convex structure on the first light-emitting surface is equal. Exemplarily, as shown in FIG. 1A and FIG. 1C,

regions

1, 2, 3, 5, 6, 7, and 8 respectively represent orthographic projections of 8 convex structures 110 on the first light-emitting surface 102, R1, R2, and R3 respectively represents the radius from the outer edge (the edge away from the first optical axis 11) of the adjacent third, fourth, and fifth convex structures 110 to the first optical axis 11, and R3-R2=R2-R1 .

例如，在本公开一些实施例提供的透镜结构中，在第一曲面包括第一子曲面(凸面) 和第二子曲面(凹面)的情况下，可以根据实际需要分别设置两个曲面中的凸起结构的宽度，不限于两个曲面中的凸起结构的宽度相等。例如，第一子曲面对应的凸起结构在第一出光面上的正投影的宽度相等，第二子曲面对应的凸起结构在第一出光面上的正投影的宽度相等，并且，第一子曲面对应的凸起结构和第二子曲面对应的凸起结构在第一出光面上的正投影的宽度不相等。For example, in the lens structure provided by some embodiments of the present disclosure, in the case that the first curved surface includes a first sub-curved surface (convex surface) and a second sub-curved surface (concave surface), the convex surfaces of the two curved surfaces can be set according to actual needs. The width of the raised structure is not limited to the same width of the raised structures in the two curved surfaces. For example, the width of the orthographic projection of the convex structure corresponding to the first sub-curved surface on the first light-emitting surface is the same, the width of the orthographic projection of the convex structure corresponding to the second sub-curved surface on the first light-emitting surface is the same, and the first The width of the orthographic projection of the convex structure corresponding to the sub-curved surface and the convex structure corresponding to the second sub-curved surface on the first light-emitting surface is not equal.

本公开至少一个实施例提供一种光源结构，该光源结构包括光源以及上述任一实施例中的透镜结构，透镜结构的第一入光面面向光源。示例性的，如图3A和图3B所示，光源结构包括光源200，光源200发出的光射向透镜结构100的凸起结构110，并由凸起结构110导入透镜结构100中。透镜结构100对入射光线进行控制并沿准直方向出射的原理，可以参见前述实施例中的相关说明，例如，图3B中的光线L2在凸起结构110中的光路可以参见图1D中的L1。At least one embodiment of the present disclosure provides a light source structure. The light source structure includes a light source and the lens structure in any of the foregoing embodiments, and the first light incident surface of the lens structure faces the light source. Exemplarily, as shown in FIGS. 3A and 3B, the light source structure includes a light source 200, and the light emitted by the light source 200 is directed to the convex structure 110 of the lens structure 100, and the convex structure 110 is introduced into the lens structure 100. The principle that the lens structure 100 controls the incident light and emits it in the collimated direction can be referred to the related description in the foregoing embodiment. For example, the optical path of the light L2 in the convex structure 110 in FIG. 3B can be referred to L1 in FIG. 1D. .

例如，在本公开至少一个实施例提供的光源结构中，透镜结构为第一透镜，光源包括发光体和第二透镜，第二透镜位于发光体和第一透镜之间且例如将发光体进行封装，第二透镜具有相对的第二入光面和第二出光面，第二入光面面向光源，第二出光面面向第一透镜，并且第一入光面为凹面，第二入光面为凸面。示例性的，如图3A和图3B所示，透镜结构100作为第一透镜，光源200包括发光体210和第二透镜220，第二透镜220位于发光体210和第一透镜100之间。For example, in the light source structure provided by at least one embodiment of the present disclosure, the lens structure is a first lens, and the light source includes a luminous body and a second lens. The second lens is located between the luminous body and the first lens, and for example, the luminous body is packaged. , The second lens has a second light-incident surface and a second light-emitting surface opposite, the second light-incident surface faces the light source, the second light-emitting surface faces the first lens, and the first light-incident surface is concave, and the second light-incident surface is Convex. Exemplarily, as shown in FIGS. 3A and 3B, the lens structure 100 serves as a first lens, and the light source 200 includes a luminous body 210 and a second lens 220, and the second lens 220 is located between the luminous body 210 and the first lens 100.

第二透镜220的朝向发光体210的第二入光面221为凹面，如此，可以提高发光体210出射且进入第二透镜220的光的量，而且由该凹面限定的凹槽可以用于容纳发光体210，可以减小整个光源结构的体积，有利于小型化设计。The second light incident surface 221 of the second lens 220 facing the luminous body 210 is a concave surface, so that the amount of light emitted by the luminous body 210 and entering the second lens 220 can be increased, and the groove defined by the concave surface can be used to accommodate The luminous body 210 can reduce the volume of the entire light source structure, which is beneficial to a miniaturized design.

例如，第二透镜的发光体可以为LED或Micro LED的朗伯发光体(余弦辐射体)。如此，发光体发射的光线的强度会依余弦公式变化，出射光的角度越大，对应该角度的光线的强度越弱，即，该发光体的亮度为规律分布，根据该变化规律设计第一透镜(例如其中的第一曲面、凸起结构)和第二透镜(例如其中的第二出光面)的形状，以使得光线射入第一透镜后在第一透镜中均匀分布，从而使得第一透镜的第一出光面出射亮度均匀的光线。For example, the luminous body of the second lens may be an LED or a Lambertian luminous body (cosine radiator) of a Micro LED. In this way, the intensity of the light emitted by the luminous body will change according to the cosine formula. The larger the angle of the emitted light, the weaker the intensity of the light corresponding to the angle, that is, the brightness of the luminous body is regularly distributed, and the first design is based on the changing law. The shape of the lens (such as the first curved surface and the convex structure) and the second lens (such as the second light-emitting surface) so that the light is evenly distributed in the first lens after entering the first lens, so that the first lens The first light-emitting surface of the lens emits light with uniform brightness.

例如，在发光体为朗伯发光体的情况下，在第一透镜100的中间区域入射的光通量多，且该区域入射的光的准直程度高，使得第一透镜100的中间区域出射的光的亮度相对较大，在第一透镜100的边缘区域，射向第一透镜100的光通量少且光的准直程度差，使得第一透镜100的边缘区域出射的光的亮度相对较小。在上述实施例中，第二透镜220的朝向第一透镜100的第二出光面222为凸面，可以将发光体210发射的光进行发散，以使得部分预射向第一曲面103的中心区域的光射在第一曲面103的周边处，从而使得光第一透镜出射的准直光的亮度分布均匀；此外，对于分布在第一曲面103的周边的凸起结构110，光线的方向经过第二出光面的偏转(发散)后，在凸起结构110的第一侧表面(入光面)上的入射角变小，例如光线可以垂直于凸起结构的第一侧表面而射入凸起结构，从而使得光线更容易射入凸起结构110，提高光的利用率，从而使得光第一透镜出射的准直光的亮度分布均匀。For example, when the luminous body is a Lambertian luminous body, the luminous flux incident in the middle area of the first lens 100 is large, and the degree of collimation of the incident light in this area is high, so that the light emitted from the middle area of the first lens 100 The brightness of the first lens 100 is relatively large. At the edge area of the first lens 100, the light flux directed to the first lens 100 is small and the degree of light collimation is poor, so that the brightness of the light emitted from the edge area of the first lens 100 is relatively small. In the above embodiment, the second light-emitting surface 222 of the second lens 220 facing the first lens 100 is a convex surface, which can diverge the light emitted by the luminous body 210, so that part of the light is pre-emitted toward the central area of the first curved surface 103. The light is emitted at the periphery of the first curved surface 103, so that the brightness distribution of the collimated light emitted by the first lens is uniform; in addition, for the convex structure 110 distributed on the periphery of the first curved surface 103, the direction of the light passes through the second After the deflection (divergence) of the light-emitting surface, the incident angle on the first side surface (light-incident surface) of the convex structure 110 becomes smaller. For example, light can be perpendicular to the first side surface of the convex structure and enter the convex structure. Therefore, it is easier for light to enter the convex structure 110, and the utilization rate of light is improved, so that the brightness distribution of the collimated light emitted by the optical first lens is uniform.

例如，在本公开至少一个实施例提供的光源结构中，如图3A和图3B所示，第二入光面221为部分球冠面，发光体210位于该部分球冠面所在的球面的球心。如此，发光体210发出的光线在第二入光面221上的入射角为90度，光线从第二入光面221进入第二透镜220时的光损耗小，且光的传播方向不变，有利于对第二出光面222的具体形状进行设计，以使得发光体210发出的光分散。For example, in the light source structure provided by at least one embodiment of the present disclosure, as shown in FIGS. 3A and 3B, the second light incident surface 221 is a partial spherical cap surface, and the luminous body 210 is located on the spherical surface of the spherical surface where the partial spherical cap is located. heart. In this way, the incident angle of the light emitted by the luminous body 210 on the second light incident surface 221 is 90 degrees, the light loss when the light enters the second lens 220 from the second light incident surface 221 is small, and the propagation direction of the light remains unchanged. It is beneficial to design the specific shape of the second light-emitting surface 222 so that the light emitted by the luminous body 210 is dispersed.

例如，在本公开至少一个实施例提供的光源结构中，第二入光面配置为使得由发光体射入第二透镜且从第二入光面射出的光，在第一透镜的各凸起结构中的光强度相等，例如，该光强度为经由凸起结构调整而转换为具有准直方向的光的光强度。例如，各个凸起结构在第一透镜的第一出光面上的正投影的宽度相等(例如参见图1C所示的实施例)，在该情况下，第一透镜的第一出光面出射的光线分布均匀。For example, in the light source structure provided by at least one embodiment of the present disclosure, the second light-incident surface is configured such that the light emitted from the luminous body enters the second lens and is emitted from the second light-incident surface on each convex of the first lens. The light intensity in the structure is equal, for example, the light intensity is the light intensity converted into light having a collimated direction through adjustment of the convex structure. For example, the width of the orthographic projection of each convex structure on the first light-emitting surface of the first lens is equal (for example, see the embodiment shown in FIG. 1C). In this case, the light emitted from the first light-emitting surface of the first lens evenly distributed.

下面，在本公开实施例的一个示例中，对第二透镜的第二出光面的形状进行设计。Below, in an example of the embodiment of the present disclosure, the shape of the second light-emitting surface of the second lens is designed.

如图3B所示，需要第一出光面101的光通量均匀分布，即出光均匀，意味着以半径为r(θ)的圆内出射的光通量(φ _r)与出射面(第一出光面101)出射的总光通量(φ _R)的比的关系，如下述公式(1)。 As shown in Fig. 3B, the luminous flux of the first light-emitting surface 101 needs to be uniformly distributed, that is, the light is uniform, which means that the luminous flux (φ _r ) and the light-emitting surface (first light-emitting surface 101) emitted in a circle with a radius of r(θ) The relationship of the ratio of the total luminous flux (φ _R ) outgoing is as shown in the following formula (1).

φ _r/φ _R＝(r/R) ² (1) φ _r /φ _R ＝(r/R) ² (1)

对应于角θ的光强度密度J(θ)可以如下述公式(2)表示。The light intensity density J(θ) corresponding to the angle θ can be expressed as the following formula (2).

发光体为朗伯发光体，角强度I(θ)分布满足下述公式，其中，I0为发光体沿透镜结构的第一光轴11出射的光的强度。The luminous body is a Lambertian luminous body, and the angular intensity I(θ) distribution satisfies the following formula, where I0 is the intensity of the light emitted by the luminous body along the first optical axis 11 of the lens structure.

I(θ)＝I ₀COS(θ) (3) I(θ)=I ₀ COS(θ) (3)

根据上述公式，可确定出射面内任一出光圆域半径r(θ)、出射面最大半径R及对应出光圆域半径r(θ)的出射角θ的关系，如下述公式(4)表示。According to the above formula, the relationship between any radius r(θ) of the exit circle, the maximum radius R of the exit surface and the exit angle θ corresponding to the radius r(θ) of the exit surface can be determined, as shown in the following formula (4).

r(θ)＝R sin(θ) (4)r(θ)=Rsin(θ) (4)

例如，根据上述公式，可以计算可以进入透镜结构100的最边缘的凸起结构110的光，并确定该光与发光体210的出光角度的对应关系。如图3B所示，发光体210在出光角度Q发射的光，经过第二出光面222之后射入与区域19对应的凸起结构110(最边缘的凸起结构)中，例如Q为18.4度。限定该角度Q范围内的光线在第二出光面222上的分布区域，然后依次类推，以计算区域18、区域17在第二出光面222上的分布，并且计算每个分布区域处的第二出光面222的斜率，从而确定第二出光面222的形状。例如，用于计算第二出光面222的初始参数可以如下表1所示。在表1中，j的数值表示凸起结构110沿第一曲面103由内向外的排布次序，如图3B所示，示出了第1-第19的凸起结构110，即，示出下表1中的j＝1至j＝19。For example, according to the above formula, the light that can enter the outermost convex structure 110 of the lens structure 100 can be calculated, and the corresponding relationship between the light and the light exit angle of the luminous body 210 can be determined. As shown in FIG. 3B, the light emitted by the luminous body 210 at the light emitting angle Q is incident into the convex structure 110 (the most edge convex structure) corresponding to the area 19 after passing through the second light emitting surface 222, for example, Q is 18.4 degrees . Define the distribution area of the light within the range of the angle Q on the second light-emitting surface 222, and then analogize to calculate the distribution of the area 18 and the area 17 on the second light-emitting surface 222, and calculate the second distribution area at each distribution area. The slope of the light-emitting surface 222 determines the shape of the second light-emitting surface 222. For example, the initial parameters used to calculate the second light-emitting surface 222 may be as shown in Table 1 below. In Table 1, the value of j represents the arrangement order of the convex structures 110 from the inside to the outside along the first curved surface 103. As shown in FIG. 3B, the convex structures 110 from 1 to 19 are shown, that is, J=1 to j=19 in Table 1 below.

表1Table 1

jj	x _j x _j	y _j y _j
11	6.506.50	00
22	6.206.20	0.590.59
33	6.006.00	1.141.14
44	5.605.60	1.71.7
55	5.205.20	2.072.07
66	4.804.80	2.352.35
77	4.404.40	2.582.58
88	4.004.00	2.752.75
99	3.603.60	2.892.89
1010	3.203.20	33
1111	2.802.80	3.083.08
1212	2.402.40	3.133.13
1313	2.002.00	3.153.15
1414	1.601.60	3.153.15
1515	1.401.40	3.15313.1531
1616	1.301.30	3.14373.1437
1717	1.201.20	3.143.14
1818	1.101.10	3.12413.1241
1919	1.001.00	3.10843.1084
2020	0.900.90	3.08873.0887
21twenty one	0.800.80	3.073.07
22twenty two	0.700.70	3.04253.0425
23twenty three	0.600.60	3.01883.0188
24twenty four	0.500.50	2.95572.9557
2525	0.400.40	2.972.97
2626	0.300.30	2.95472.9547
2727	0.200.20	2.93942.9394
2828	0.100.10	2.92952.9295
2929	0.000.00	2.932.93

示例性的，如图3B所示，发光体210位于第一透镜100的第一光轴上，以发光体 210为原点建立直角坐标系。根据该直角坐标系，用于计算第二出光面222的形状的函数表达式如下。Exemplarily, as shown in FIG. 3B, the luminous body 210 is located on the first optical axis of the first lens 100, and a rectangular coordinate system is established with the luminous body 210 as the origin. According to the rectangular coordinate system, the function expression for calculating the shape of the second light-emitting surface 222 is as follows.

y＝Ay _j+By _j+1+Cy” _j+Dy” _j+1 (5) y=Ay _j +By _j+1 +Cy” _j +Dy” _j+1 (5)

公式(5)中的部分参数，可以依据下述公式计算。Some parameters in formula (5) can be calculated according to the following formula.

A＝(x _j+1-x)/(x _j+1-x _j) A=(x _j+1 -x)/(x _j+1 -x _j )

B＝1-A＝(x-x _j)/(x _j+1-x _j) B=1-A=(xx _j )/(x _j+1 -x _j )

C＝(A ³-A)((x _j+1-x _j)) ²/6 C=(A ³ -A)((x _j+1 -x _j )) ² /6

D＝(B ³-B)((x _j+1-x _j)) ²/6 D=(B ³ -B)((x _j+1 -x _j )) ² /6

在该公式(5)中，y＝f(x)为第二出光面的表面函数，y”为函数y＝f(x)的二阶导函数，j为迭代角标，j的数值可以参见表1。In the formula (5), y=f(x) is the surface function of the second light-emitting surface, y” is the second derivative function of the function y=f(x), j is the iterative index, and the value of j can be found in Table 1.

例如，在本公开实施例的一个示例中，如图3B所示，沿x的方向，与第一曲面103的第一子曲面1031(凸面)对应的区域1、2、3、4和5的宽度为0.7mm，与第一曲面103的第二子曲面1032(凹面)对应的区域6至区域19的每个的宽度都为0.65mm。第一透镜100的边缘最大厚度H不大于8.1mm，相邻凸起结构110的侧表面之间的夹角不小于20度，凸起结构110至第一出光面102的距离不小于0.35mm。例如，在对应第一子曲面1031的区域1、2、3、4和5，凸起结构110至第一出光面102的距离可能不满足上述条件，即，透镜结构100的位于区域1、2、3、4和5部分的设计厚度小，从而将第一子曲面1031设置为凸面，例如透镜结构100的第一子曲面1031所在的部分可以设置为透射式的菲涅尔透镜结构。例如，考虑适当焦距(例如为6mm)，透镜结构的半径r1(例如第一出光面102的半径)为12.7mm。例如，第一曲面103为抛物面，其边缘的半径r2为11.4mm，第一子曲面1031的边缘(其与第二子曲面1032的交界)所在面至第一曲面103的边缘所在面的距离h为6.0mm，依据r2、h、以及利用上述数据获得的第一子曲面1031的边缘的半径(5×0.7mm＝3.5mm)，可以限定出抛物面的形状。For example, in an example of the embodiment of the present disclosure, as shown in FIG. 3B, along the x direction, the

areas

1, 2, 3, 4, and 5 corresponding to the first sub-curved surface 1031 (convex) of the first curved surface 103 The width is 0.7 mm, and the width of each of the region 6 to the region 19 corresponding to the second sub-curved surface 1032 (concave surface) of the first curved surface 103 is 0.65 mm. The maximum thickness H of the edge of the first lens 100 is not greater than 8.1 mm, the angle between the side surfaces of adjacent convex structures 110 is not less than 20 degrees, and the distance from the convex structures 110 to the first light-emitting surface 102 is not less than 0.35 mm. For example, in

areas

1, 2, 3, 4, and 5 corresponding to the first sub-curved surface 1031, the distance between the convex structure 110 and the first light-emitting surface 102 may not meet the above condition, that is, the lens structure 100 is located in the

areas

1, 2 3, 4, and 5 have a small design thickness, so that the first sub-curved surface 1031 is configured as a convex surface. For example, the portion where the first sub-curved surface 1031 of the lens structure 100 is located can be configured as a transmissive Fresnel lens structure. For example, considering an appropriate focal length (for example, 6 mm), the radius r1 of the lens structure (for example, the radius of the first light-emitting surface 102) is 12.7 mm. For example, the first curved surface 103 is a parabolic surface, the radius r2 of its edge is 11.4mm, and the distance h from the edge of the first sub-curved surface 1031 (the boundary with the second sub-curved surface 1032) to the edge of the first curved surface 103 It is 6.0 mm. According to r2, h, and the radius of the edge of the first sub-curved surface 1031 (5×0.7 mm=3.5 mm) obtained by using the above data, the shape of the paraboloid can be defined.

示例性的，如图3B所示，第二子曲面1032在该截面内的曲线，在直角坐标系中的抛物线方程如以下公式(6)所述。Exemplarily, as shown in FIG. 3B, the curve of the second sub-curved surface 1032 in the section has a parabolic equation in the rectangular coordinate system as described in the following formula (6).

在公式(6)中，f为透镜结构的焦距。In formula (6), f is the focal length of the lens structure.

本公开至少一个实施例提供一种背光模组，该背光模组包括前述任一实施例中的光源结构。示例性的，如图4所示，背光模组包括光源结构1000和背板2000，背板2000提供支撑，以固定光源结构1000。例如，背板2000的材料为透明材料，以使得背光模组具有***，以应用机载头盔显示***或其它设备中。例如，背板2000的材料可以为玻璃、聚甲基丙烯酸甲酯(PolyMethyl MethAcrylate，PMMA)、聚对苯二甲酸乙二醇酯(PET)等。At least one embodiment of the present disclosure provides a backlight module including the light source structure in any of the foregoing embodiments. Exemplarily, as shown in FIG. 4, the backlight module includes a light source structure 1000 and a back plate 2000, and the back plate 2000 provides support to fix the light source structure 1000. For example, the material of the back plate 2000 is a transparent material, so that the backlight module has a see-through function, so as to be used in an airborne helmet display system or other equipment. For example, the material of the back plate 2000 may be glass, polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), or the like.

例如，背板2000上还可以铺设用于与发光体连接的走线，以对发光体的开关、亮度等进行控制。例如，该走线可以透明导电材料，例如，氧化铟锡(ITO)、氧化铟锌(IZO)、氧化铟镓(IGO)、氧化镓锌(GZO)氧化锌(ZnO)、氧化铟(In ₂O ₃)、氧化铝锌(AZO)等。 For example, the backplane 2000 can also be laid with wires for connecting with the luminous body to control the on-off, brightness, etc. of the luminous body. For example, the traces can be made of transparent conductive materials, such as indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), gallium zinc oxide (GZO), zinc oxide (ZnO), indium oxide (In ₂ O ₃ ), aluminum oxide zinc (AZO), etc.

例如，在本公开至少一个实施例提供的背光模组中，如图4所示，光源结构1000可以设置为一个，以用于微型显示器。For example, in the backlight module provided by at least one embodiment of the present disclosure, as shown in FIG. 4, the light source structure 1000 can be provided as one for a micro display.

例如，在本公开至少一个实施例提供的背光模组中，如图5所示，光源结构可以设置为多个，例如多个光源结构在透镜结构的第一入光面至第一出光面的方向垂直的平面上阵列排布。例如，背光模组还可以包括光学膜片3000，光学膜片3000位于光源结构1000的出光侧。利用光学膜片3000可以提高光源结构1000发出的光线的准直程度，此外，通过光学膜片3000对光源结构1000发出的光线进行扩散，再使得被扩散的光准直，可以消除或缓解相邻光源结构之间的区域没有光线出射而造成的背光模组出光不均匀，从而使得整个背光模组出射的光线的亮度分布均匀。例如，该光学膜片可以包括扩散膜、棱镜膜等。For example, in the backlight module provided by at least one embodiment of the present disclosure, as shown in FIG. 5, the light source structure may be provided in multiple, for example, multiple light source structures are located between the first light incident surface and the first light output surface of the lens structure. Arrays are arranged on a plane perpendicular to the direction. For example, the backlight module may further include an optical film 3000, and the optical film 3000 is located on the light exit side of the light source structure 1000. The use of the optical film 3000 can improve the degree of collimation of the light emitted by the light source structure 1000. In addition, the optical film 3000 diffuses the light emitted by the light source structure 1000, and then collimates the diffused light, which can eliminate or relieve adjacent The area between the light source structures does not emit light to cause uneven light output of the backlight module, so that the brightness distribution of the light emitted by the entire backlight module is uniform. For example, the optical film may include a diffusion film, a prism film, and the like.

本公开至少一个实施例提供一种显示装置，该显示装置包括显示面板以及位于前述实施例中的背光模组。例如，显示面板包括显示侧和背侧，背光模组位于显示面板的背侧并与显示面板重叠。示例性的，如图6所示，显示装置的显示面板400包括显示侧401和与显示侧401相背的背侧402，背光模组300面向显示面板400的背侧402。如此，从背光模组300出射的光，从显示面板400的背侧402射入显示面板400，在显示图像时，该光线可从显示面板400的显示侧401出射。例如，背光模组300的结构可以如图4和图5所示。例如，在本公开至少一个实施例中，显示面板400可以固定于如图4或图5所示的背光模组的背板2000上。At least one embodiment of the present disclosure provides a display device that includes a display panel and the backlight module in the foregoing embodiments. For example, the display panel includes a display side and a back side, and the backlight module is located on the back side of the display panel and overlaps the display panel. Exemplarily, as shown in FIG. 6, the display panel 400 of the display device includes a display side 401 and a back side 402 opposite to the display side 401, and the backlight module 300 faces the back side 402 of the display panel 400. In this way, the light emitted from the backlight module 300 enters the display panel 400 from the back side 402 of the display panel 400, and the light can be emitted from the display side 401 of the display panel 400 when an image is displayed. For example, the structure of the backlight module 300 may be as shown in FIGS. 4 and 5. For example, in at least one embodiment of the present disclosure, the display panel 400 may be fixed on the back plate 2000 of the backlight module as shown in FIG. 4 or FIG. 5.

例如，在本公开实施例提供的显示装置中，显示面板的一个示例为液晶显示面板，包括阵列基板和对置基板，二者彼此对置以形成液晶盒，在液晶盒中填充有液晶材料。该对置基板例如为彩膜基板。阵列基板的每个像素单元的像素电极用于施加电场以对液晶材料的旋转的程度进行控制从而进行显示操作。For example, in the display device provided by the embodiment of the present disclosure, an example of the display panel is a liquid crystal display panel, which includes an array substrate and a counter substrate, which are opposed to each other to form a liquid crystal cell, and the liquid crystal cell is filled with liquid crystal material. The counter substrate is, for example, a color filter substrate. The pixel electrode of each pixel unit of the array substrate is used to apply an electric field to control the degree of rotation of the liquid crystal material to perform a display operation.

例如，在本公开实施例提供的显示装置中，显示面板的另一个示例为电子纸显示面板，例如，阵列基板上形成有电子墨水层，每个像素单元的像素电极作为用于施加驱动电子墨水中的带电微颗粒移动以进行显示操作的电压。For example, in the display device provided by the embodiment of the present disclosure, another example of the display panel is an electronic paper display panel. For example, an electronic ink layer is formed on an array substrate, and the pixel electrode of each pixel unit is used for applying and driving electronic ink. The charged microparticles move to display the voltage of the operation.

例如，该显示装置为用于机载头盔显示***的微型液晶显示器，也可以为电视、数码相机、手机、手表、平板电脑、笔记本电脑、导航仪等任何具有显示功能的产品或者部件。For example, the display device is a miniature liquid crystal display used in an airborne helmet display system, and can also be any product or component with display function such as a TV, digital camera, mobile phone, watch, tablet computer, notebook computer, navigator, etc.

对于本公开，还有以下几点需要说明：For this disclosure, the following points need to be explained:

(1)本公开实施例附图只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。(1) The drawings of the embodiments of the present disclosure only refer to the structures related to the embodiments of the present disclosure, and other structures can refer to common designs.

(2)为了清晰起见，在用于描述本公开的实施例的附图中，层或区域的厚度被放大或缩小，即这些附图并非按照实际的比例绘制。(2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is enlarged or reduced, that is, these drawings are not drawn according to actual scale.

(3)在不冲突的情况下，本公开的实施例及实施例中的特征可以相互组合以得到新的实施例。(3) In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

以上，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，本公开的保护范围应以权利要求的保护范围为准。The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

一种透镜结构，包括相对设置的第一入光面和第一出光面，其中，A lens structure includes a first light-incident surface and a first light-emitting surface which are arranged oppositely, wherein,

所述第一入光面的背离所述第一出光面的一侧设置有多个凸起结构，所述多个凸起结构的背离所述第一出光面的端部位于第一曲面内，以及A side of the first light-incident surface facing away from the first light-emitting surface is provided with a plurality of convex structures, and ends of the plurality of convex structures facing away from the first light-emitting surface are located in the first curved surface, as well as

所述第一曲面的至少部分为向所述透镜结构的第一出光面一侧凹陷的凹面。At least a part of the first curved surface is a concave surface recessed toward the first light-emitting surface of the lens structure.
根据权利要求1所述的透镜结构，其中，The lens structure according to claim 1, wherein:

所述第一曲面包括第一子曲面和第二子曲面，所述第一子曲面位于所述第一曲面的中间区域，所述第二子曲面环绕所述第一子曲面，以及The first curved surface includes a first sub-curved surface and a second sub-curved surface, the first sub-curved surface is located in the middle area of the first curved surface, and the second sub-curved surface surrounds the first sub-curved surface, and

所述第一子曲面为向背离所述透镜结构的所述第一出光面所在侧凸出的凸面，所述第二子曲面为向所述透镜结构的所述第一出光面所在侧凹陷的凹面。The first sub-curved surface is a convex surface that protrudes away from the side where the first light-emitting surface of the lens structure is located, and the second sub-curved surface is recessed toward the side where the first light-emitting surface of the lens structure is located Concave.
根据权利要求2所述的透镜结构，其中，The lens structure according to claim 2, wherein:

在与所述第一入光面至第一出光面的方向垂直的方向上，所述第一子曲面的形心至所述第一子曲面的边缘的距离为所述第一子曲面的形心至所述第二子曲面的远离所述第一子曲面的边缘的距离的1/6-1/3。In the direction perpendicular to the direction from the first light-incident surface to the first light-emitting surface, the distance from the centroid of the first sub-curved surface to the edge of the first sub-curved surface is the shape of the first sub-curved surface. 1/6-1/3 of the distance from the center to the edge of the second sub-curved surface away from the first sub-curved surface.
根据权利要求2或3所述的透镜结构，其中，The lens structure according to claim 2 or 3, wherein:

所述凸面和所述凹面至少之一的形状为部分球冠面或部分抛物面。The shape of at least one of the convex surface and the concave surface is a partial spherical crown surface or a partial parabolic surface.
根据权利要求3-4任一所述的透镜结构，其中，The lens structure according to any one of claims 3-4, wherein:

所述第一曲面关于沿所述第一入光面至所述第一出光面的方向平行的轴线中心对称，The first curved surface is symmetrical about an axis parallel to the direction from the first light incident surface to the first light exit surface,

所述第一子曲面的形心位于所述轴线上。The centroid of the first sub-curved surface is located on the axis.
根据权利要求4所述的透镜结构，其中，The lens structure according to claim 4, wherein:

所述第一子曲面的和所述第二子曲面的形状分别为不同的抛物面的一部分，The shapes of the first sub-curved surface and the second sub-curved surface are parts of different paraboloids,

所述第一子曲面和所述第二子曲面相交且二者的交界线位于第一平面内，所述第一平面与所述第一入光面至第一出光面的方向垂直，以及The first sub-curved surface and the second sub-curved surface intersect and the boundary line of the two is located in a first plane, and the first plane is perpendicular to the direction from the first light-incident surface to the first light-emitting surface, and

所述第一子曲面所在抛物面在所述交界线之内的部分与所述第二子曲面所在抛物面在所述交界线之内的部分关于所述第一平面对称。The part of the parabola where the first sub-curved surface is located within the boundary line and the part of the parabola where the second sub-curved surface is located within the boundary line are symmetrical about the first plane.
根据权利要求1-6任一所述的透镜结构，其中，The lens structure according to any one of claims 1-6, wherein:

所述第一曲面在所述第一出光面上的正投影包括圆形、椭圆形和矩形之一。The orthographic projection of the first curved surface on the first light-emitting surface includes one of a circle, an ellipse and a rectangle.
根据权利要求1-6任一所述的透镜结构，还包括与沿所述第一入光面至所述第一出光面的方向平行的第一光轴，其中，The lens structure according to any one of claims 1 to 6, further comprising a first optical axis parallel to a direction from the first light incident surface to the first light exit surface, wherein,

所述多个凸起结构包括关于所述第一光轴中心对称的多对所述凸起结构。The plurality of convex structures includes a plurality of pairs of the convex structures that are symmetric about the center of the first optical axis.
根据权利要求8所述的透镜结构，其中，The lens structure according to claim 8, wherein:

所述多个凸起结构的平面形状为环形，以及所述多个凸起结构以所述第一光轴为中心为同心环形排布。The planar shape of the plurality of convex structures is a ring, and the plurality of convex structures are arranged in a concentric ring with the first optical axis as the center.
根据权利要求8或9所述的透镜结构，其中，The lens structure according to claim 8 or 9, wherein:

相邻的所述多个凸起结构的与所述第一入光面共面的部分彼此连接。The portions of the adjacent plurality of convex structures that are coplanar with the first light incident surface are connected to each other.
根据权利要求8-10任一所述的透镜结构，其中，所述多个凸起结构的每个沿与所述第一光轴平行的方向的截面形状为三角形，10. The lens structure according to any one of claims 8-10, wherein the cross-sectional shape of each of the plurality of convex structures along a direction parallel to the first optical axis is a triangle,

所述多个凸起结构的每个包括与所述第一入光面共面的底面、面向所述第一光轴的第一侧表面和背离所述第一光轴的第二侧表面，Each of the plurality of convex structures includes a bottom surface coplanar with the first light incident surface, a first side surface facing the first optical axis, and a second side surface facing away from the first optical axis,

所述第一侧表面和所述第二侧表面设置为使得从所述第一侧表面入射的光在所述第二侧表面全反射并射向所述底面，以及The first side surface and the second side surface are arranged such that light incident from the first side surface is totally reflected on the second side surface and directed toward the bottom surface, and

经由所述第一侧表面入射以及所述第二侧表面全反射的光与所述第一光轴基本平行。Light incident through the first side surface and totally reflected by the second side surface is substantially parallel to the first optical axis.
根据权利要求8-11任一所述的透镜结构，其中，The lens structure according to any one of claims 8-11, wherein:

所述第一出光面为平面，并且与所述第一光轴垂直。The first light-emitting surface is a flat surface and is perpendicular to the first optical axis.
根据权利要求12所述的透镜结构，其中，The lens structure according to claim 12, wherein:

所述多个凸起结构的每个在所述第一出光面上的正投影的宽度相等。The width of the orthographic projection of each of the plurality of convex structures on the first light-emitting surface is equal.
一种光源结构，包括光源以及权利要求1-13任一所述的透镜结构，其中，A light source structure, comprising a light source and the lens structure according to any one of claims 1-13, wherein:

所述透镜结构的第一入光面面向所述光源。The first light incident surface of the lens structure faces the light source.
根据权利要求14所述的光源结构，其中，所述透镜结构为第一透镜，The light source structure according to claim 14, wherein the lens structure is a first lens,

所述光源包括发光体和第二透镜，所述第二透镜位于所述发光体和所述第一透镜之间，The light source includes a luminous body and a second lens, the second lens is located between the luminous body and the first lens,

所述第二透镜具有相对的第二入光面和第二出光面，所述第二入光面面向所述光源，所述第二出光面面向所述第一透镜，并且所述第一入光面为凹面，所述第二入光面为凸面。The second lens has a second light entrance surface and a second light exit surface opposite to each other, the second light entrance surface faces the light source, the second light exit surface faces the first lens, and the first light entrance surface The light surface is a concave surface, and the second light incident surface is a convex surface.
根据权利要求15所述的光源结构，其中，The light source structure according to claim 15, wherein:

所述第二入光面为部分球冠面，所述发光***于所述部分球冠面所在的球面的球心。The second light incident surface is a partial spherical crown surface, and the luminous body is located at the center of the spherical surface where the partial spherical crown surface is located.
根据权利要求15或16所述的光源结构，其中，The light source structure according to claim 15 or 16, wherein:

所述第二入光面配置为使得由所述发光体射入所述第二透镜且从所述第二入光面射出的光，在所述第一透镜的所述多个凸起结构的每个中的光强度相等，The second light-incident surface is configured such that the light emitted by the luminous body into the second lens and emitted from the second light-incident surface is on the surface of the plurality of convex structures of the first lens The light intensity in each is equal,

所述光强度为经由所述多个凸起结构调整而转换为具有准直方向的光的光强度。The light intensity is the light intensity converted into light having a collimated direction through adjustment of the plurality of convex structures.
一种背光模组，包括权利要求14-17任一所述的光源结构。A backlight module comprising the light source structure according to any one of claims 14-17.
根据权利要求18所述的背光模组，其中，所述光源结构设置为多个且在所述透镜结构的第一入光面至第一出光面的方向垂直的平面上阵列排布。18. The backlight module of claim 18, wherein the light source structure is provided in multiples and arranged in an array on a plane perpendicular to the direction from the first light incident surface to the first light output surface of the lens structure.
一种显示装置，包括显示面板以及权利要求18或19所述的背光模组，其中，所述显示面板包括显示侧和背侧，所述背光模组位于所述显示面板的背侧并与所述显示面板重叠。A display device comprising a display panel and the backlight module of claim 18 or 19, wherein the display panel includes a display side and a back side, and the backlight module is located on the back side of the display panel and is connected to the The display panels overlap.