WO2022213909A1 - 一种透明单向出光光源模组 - Google Patents

一种透明单向出光光源模组 Download PDF

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Publication number
WO2022213909A1
WO2022213909A1 PCT/CN2022/084945 CN2022084945W WO2022213909A1 WO 2022213909 A1 WO2022213909 A1 WO 2022213909A1 CN 2022084945 W CN2022084945 W CN 2022084945W WO 2022213909 A1 WO2022213909 A1 WO 2022213909A1
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Prior art keywords
light
guide plate
light guide
shaped
light source
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PCT/CN2022/084945
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English (en)
French (fr)
Inventor
武鹏
周淑金
吕林忠
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马鞍山晶智科技有限公司
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Publication of WO2022213909A1 publication Critical patent/WO2022213909A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces

Definitions

  • the invention relates to a light source module, in particular to a transparent one-way light-emitting light source module.
  • the present invention proposes a high Transparent one-way light-emitting light source module.
  • Patent US20180052274A1 is a thin film light guide film. As shown in Figure 1, a microstructure is made on the light guide film, so that the light passes through the microstructure and destroys the total reflection condition of its propagation, and then exits on the other side. Pressed together, optically, each layer of light guide film is a single individual. The cost is high and the process is complex, while the efficiency is low.
  • the structure of the light guide film in the patent CN 109031512 A is a trapezoid structure. As shown in Figure 2, the light guide film and the light guide plate are bonded together with an adhesive layer, which is equivalent to an inverted trapezoid structure on the surface of the light guide plate. After the diffused total reflection on the side of the inverted trapezoid structure, light is emitted on the bottom surface of the trapezoid.
  • the light guide film structure requires an adhesive layer to bond the two-layer structure together, and the flatness of the adhesive layer greatly affects its light output effect, thus causing problems such as decreased contrast and reduced brightness;
  • Patent CN 108519637 A The microstructure is made on the light guide plate, as shown in Figure 3, the shape of the microstructure is a truncated cone, the light irradiates the surface of the microstructure, and the light is refracted on the surface. There is a phenomenon of light leakage on the back side. Although the back side is attached with a transflective film, which can suppress the light leakage on the back side, it will reduce the light transmittance. At the same time, the transflective structure needs to be aligned with the microstructure on the opposite side, so the process is complicated. ,higher cost.
  • the technical problem to be solved by the present invention is to provide a transparent one-way light-emitting light source module with good collimation, high transparency, simple manufacturing process and low cost.
  • a transparent one-way light-emitting light source module comprising a light source and a light guide plate
  • the light guide plate includes a light incident surface, a first surface and a second surface, and is characterized in that The first surface is provided with a bonding layer, and the refractive index of the light guide plate is greater than the refractive index of the bonding layer.
  • the refractive index of the light guide plate is greater than the refractive index of the bonding layer by 0.05 or more.
  • the light guide plate is a wedge-shaped light guide plate, and the angle between the light incident surface and the first surface is 80-100 degrees.
  • a protective layer is provided on the second surface of the wedge-shaped light guide plate, and the refractive index of the bonding layer is greater than the refractive index of the protective layer.
  • the side of the wedge-shaped light guide plate facing the light source is integrally provided with a horn-shaped first auxiliary light guide plate.
  • An inverted trapezoidal collimating microprism array is arranged on the non-adhering surface of the adhering layer.
  • the light guide plate is a parallel light guide plate, the second surface is provided with a zigzag microstructure, the side of the light guide plate facing the light source is integrally provided with a second auxiliary light guide plate, and the first auxiliary light guide plate is provided.
  • the surfaces of the two auxiliary light guide plates on the same side as the second surface are provided with auxiliary zigzag microstructures, and the zigzag directions of the zigzag microstructures are opposite to the zigzag directions of the auxiliary zigzag microstructures.
  • the light guide plate is a parallel light guide plate, the first surface is provided with a sawtooth-shaped microstructure, the bonding layer is filled with the sawtooth-shaped microstructure, and the light guide plate faces the light source.
  • One side is integrally provided with a second auxiliary light guide plate, and the second auxiliary light guide plate is provided with an auxiliary sawtooth-shaped microstructure on the same side of the first surface, and the sawtooth-shaped microstructure is the same as that of the first surface.
  • the zigzag directions of the auxiliary zigzag microstructures are opposite.
  • the present invention has the advantages that the structure of each component is simple, the manufacturing difficulty and cost are small, the single-sided light can be effectively realized, and the parallel beam of the enlarged cross-section produced has good collimation, and the overall module High transparency and great compatibility with other technologies.
  • Fig. 1 is the structural representation of patent US20180052274A1;
  • Fig. 2 is the structural representation of patent CN 109031512 A
  • Fig. 3 is the structural representation of patent CN 108519637 A
  • Embodiment 1 of the present invention is a schematic structural diagram of Embodiment 1 of the present invention.
  • Embodiment 1 of the present invention is a schematic structural diagram of an application example of Embodiment 1 of the present invention.
  • Embodiment 2 of the present invention is a schematic structural diagram of Embodiment 2 of the present invention.
  • Embodiment 7 is a schematic structural diagram of Embodiment 3 of the present invention.
  • Embodiment 4 of the present invention is a schematic structural diagram of Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural diagram of Embodiment 5 of the present invention.
  • FIG. 10 is a schematic structural diagram of Embodiment 6 of the present invention.
  • a transparent one-way light-emitting light source module includes a light source 1 and a wedge-shaped light guide plate 2, the wedge-shaped angle is ⁇ , and the wedge-shaped light guide plate 2 includes a light incident surface 20, a first surface 21 and a first surface.
  • the two surfaces 22 and the first surface 21 are provided with a bonding layer 3.
  • the material of the wedge-shaped light guide plate 2 is selected from PC, PMMA or glass with a refractive index of 1.5 to 1.7, which is greater than the refractive index of the bonding layer 3 by more than 0.05.
  • the material of 3 can choose the refractive index of 1.5-1.3 PMMA, silica gel, acrylic resin or epoxy resin, etc.
  • the light emitted by the light source 1 enters the wedge-shaped light guide plate 2, and the light 201 reaches the junction of the wedge-shaped light guide plate 2 and the bonding layer 3.
  • a surface 21 When a surface 21 is used, its incident angle is ⁇ .
  • ⁇ is greater than the total reflection angle of the two materials, the light propagates in the wedge-shaped light guide plate 2. Due to the wedge-shaped structure, the incident angle ⁇ of the light gradually decreases at a speed of 2 ⁇ times. Therefore, when the incident angle ⁇ is smaller than the total reflection angle of the two materials, the light exits into the bonding layer 3 .
  • the exit angle ⁇ is a large-angle collimated light close to 90°, and finally enters the display system. Since the wedge-shaped angle ⁇ limits its outgoing angle, the incident angle of all outgoing rays does not exceed (total reflection angle-2 ⁇ ) degrees, so all outgoing rays are collimated and large-angle outgoing rays, and because the other side 22 is not fitted , is an air medium, so when the incident angle ⁇ does not meet the total reflection angle of the first surface 21, it still meets the total reflection angle of the air on the second surface 22 and the material of the wedge-shaped light guide plate 2, so it can emit light from one side, Since the angle ⁇ of the wedge-shaped light guide plate 2 is extremely small, and there is no other light-emitting structure on the surface, the overall module transparency is extremely high.
  • the display 4 is provided on the non-bonding surface 31 of the bonding layer 3 .
  • Embodiment 2 As shown in FIG. 6, on the basis of Embodiment 1, a protective layer 5 is provided on the side of the wedge-shaped light guide plate 2 facing away from the second surface 22 of the bonding layer 3, and the refractive index of the protective layer 5 is lower than that of the bonding layer 3. Therefore, for the light in the wedge-shaped light guide plate 2, the total reflection angle ⁇ of the bonding layer 3 on the first surface 21 is greater than the total reflection angle ⁇ of the protective layer 5 on the second surface 22, Therefore, when the light ray 202 is totally reflected on the second surface 22 , it may not be totally reflected when it is on the first surface 21 . Since the speed of the light 202 approaching the total reflection angle is 2 ⁇ degrees after each total reflection, the total reflection angle ⁇ only needs to be greater than the total reflection angle ⁇ by 2 ⁇ degrees, that is,
  • the refractive index n 2 of the protective layer 5 the refractive index n 1 of the bonding layer 3 and the refractive index n of the wedge-shaped light guide plate only need to satisfy the following relationship
  • the overall module can continue to be attached to other structures without affecting its optical effect, and can adapt to the process requirements of full lamination.
  • Embodiment 3 As shown in FIG. 7, on the basis of Embodiment 1, a horn-shaped first auxiliary light guide plate 6 is integrally arranged on the side of the wedge-shaped light guide plate 2 facing the light source 1, and the angle between the bell mouths is ⁇ , which is It contains two auxiliary surfaces 23 and 24. The light irradiating on the auxiliary surfaces 23 and 24 will effectively collimate the light. The light 301 is irradiated on the auxiliary surface 23, and the total reflection occurs on the 23 surface, and its travel angle is counterclockwise.
  • the light 302 irradiates the auxiliary surface 24, total reflection occurs on the 24 surface, and its travel angle is deflected ⁇ degrees clockwise, so the rays 301 and 302 are collimated after passing through the auxiliary surfaces 23 and 24, After the light reaches the first surface 21, the incident angles ⁇ 1 and ⁇ 2 of the light rays 301 and 302 relative to the first surface 21 will increase compared with the original, which better meets the total reflection condition of the first surface 21, and greatly improves the The overall system efficiency, at the same time, the light rays 301 and 302 are closer to 0-degree light rays, and the range irradiated on the first surface 21 moves more toward the rear end, which is more conducive to the adjustment of the uniformity of the system.
  • Embodiment 4 As shown in FIG. 8, an inverted trapezoidal collimation microprism array 50 is arranged on the surface 31 of the bonding layer 3, so that the large-angle light 601 and the like are collimated by the inverted trapezoidal collimation microprism array 50, Vertical exit, the light 601 can exit the light guide plate 2 because the light does not meet the total reflection condition of the first surface 21, but since the wedge angle ⁇ of the light guide plate 2 is extremely small, the exit angle range of the light 601 is only within the wedge angle ⁇ Therefore, all the light rays similar to the light rays 601 are highly collimated light rays.
  • the light rays 601 After the light rays 601 pass through the bonding layer 3, the light rays 601 pass through the contact surface 31 between the bonding layer 3 and the collimating microprism array 50 and enter the collimating microprism array 50. , after the light 601 enters the collimating microprism array 50, it is irradiated on the surface 51, totally reflected on the surface 51, the light 601 passes through the surface 52, and exits vertically.
  • the degree of angular collimation is extremely high, and it has good unidirectional collimation and light emission characteristics.
  • the collimating microprism array 50 can adjust the angle of the surface 51 according to the angle of the light 601, so that the light 601 can exit vertically on the surface 52, and the collimating microprism
  • the array 50 can also be a two-dimensional array, collimating light in two dimensions.
  • Embodiment 5 As shown in FIG. 9 , the light guide plate 2 is a parallel light guide plate, the second surface 22 is provided with a first sawtooth-shaped microstructure 25 , and the apex angle of the first sawtooth is ⁇ , and the light guide plate 2 faces one of the light sources 1 .
  • a flat-shaped second auxiliary light guide plate 7 is integrally arranged on the side, and a second zigzag-shaped microstructure 26 is arranged on the same side of the flat-shaped second auxiliary light guide plate 7 as the second surface 22.
  • the apex angle of the second sawtooth is ⁇
  • the light 701 irradiates the sawtooth surface of the second sawtooth-shaped microstructure 26, and total reflection occurs on its surface.
  • the traveling angle of the light 701 is deflected by ⁇ degrees in the clockwise direction, and the light 701 is closer to the zero-degree light. Therefore, the function of the second sawtooth-shaped microstructure 26 is the same as that of the bell mouth structure in the third embodiment; after the light 701 irradiates the first surface 21, total reflection occurs and continues to transmit forward, and then the light 701 irradiates the sawtooth of the first sawtooth-shaped microstructure 25. On the surface, total reflection occurs on its surface, the light is deflected by ⁇ degrees in the counterclockwise direction, and then continues to be irradiated on the first surface 21.
  • the incident angle of the light 701 to the first surface 21 is reduced by 2 ⁇ degrees compared with the previous one.
  • the angle of total reflection is smaller than the total reflection angle
  • the light 701 exits on the first surface 21 and enters the subsequent optical structure, so the first sawtooth-shaped microstructure 25 can perform the function of the wedge-shaped plate in the first embodiment.
  • the zigzag directions of the first zigzag-shaped microstructures 25 and the second zigzag-shaped microstructures 26 are opposite.
  • the wedge-shaped light guide plate 2 and the horn-shaped first auxiliary light guide plate 6 of the third embodiment are equivalent to zigzag-shaped microstructures with the same angle. In some extremely thin or process-required scenarios, this alternative solution can be used Design and processing, with extremely high machinability, is conducive to large-scale production.
  • Embodiment 6 As shown in FIG. 10, the light guide plate 2 is a parallel light guide plate, the first surface 21 is provided with a first sawtooth-shaped microstructure 25, the bonding layer 3 is filled with the first sawtooth-shaped microstructure 25, and the light guide plate 2 faces One side of the light source 1 is integrally provided with a flat-shaped second auxiliary light guide plate 7 , the second auxiliary light guide plate 7 is provided with a second sawtooth-shaped microstructure 26 on the same side as the first surface 21 , and the first sawtooth-shaped microstructure 25 is opposite to the zigzag direction of the second zigzag microstructure 26 .
  • the zigzag microstructure Since the zigzag microstructure will produce a certain degree of haze, in order to meet the requirements of transparency, the zigzag microstructure is filled with the bonding layer material, which greatly reduces the haze of the zigzag microstructure without affecting the optical effect. , so that the overall module still has a very high transparency.

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  • General Physics & Mathematics (AREA)
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Abstract

一种透明单向出光光源模组，包括光源（1）和导光板（2），导光板（2）包括入光面（20）、第一表面（21）和第二表面（22），第一表面（21）上设置有贴合层（3），导光板（2）的折射率大于贴合层（3）的折射率，各组件的结构简单，制作难度和成本较小，能够有效地实现单面出光，且所产生的扩大截面的平行光束准直性好，整体模组透明度极高，与其他技术具有极大的兼容性。

Description

一种透明单向出光光源模组 技术领域
本发明涉及一种光源模组，尤其是涉及一种透明单向出光光源模组。
背景技术
随着显示技术的发展，以及不同显示场景的需求，新型显示系统有了较大的市场前景，例如更加节能护眼的反射式液晶显示系统，电子纸显示系统，以及应用更加前沿的透明显示系统，但是这些系统所需求的光源要求具有很高的透明性，同时具有良好的出光单向性，因此透明单向出光光源系统是这些新型显示系统应用于市场的前提，本发明提出了一种高透明性的单向出光光源模组。
专利US20180052274A1为薄膜导光膜，如图1所示，在导光膜上制作微结构，使光线经过微结构后破坏其传播的全反射条件，之后在另一面出射，多层此薄膜导光膜压合而成，在光学上为各层导光膜为单个个体。成本较高且工艺复杂，同时效率较低。
专利CN 109031512 A中导光膜结构为梯形结构，如图2所示，将此导光膜与导光板用胶层粘结在一起，相当于在导光板表面存在一倒梯形结构，光线射入到倒梯形结构侧面发散全反射后，在梯形底面出光。导光膜结构，其需要胶层将两层结构粘结在一起，其胶层平整性极大影响其出光效果，因而造成对比度下降，亮度降低等问题；
专利CN 108519637 A导光板上制作微结构，如图3所示，微结构形状为圆台型，光线照射到微结构表面，在表面折射出光。存在背面漏光现象，虽然其背面贴合有半透半反膜，可以抑制其背面漏光，但会降低光透过率，同时，半透半反结构要与其对面的微结构对准，所以工艺复杂，成本较高。
发明内容
本发明所要解决的技术问题是提供一种准直性好、透明度高且制作工艺简单，成本较低的透明单向出光光源模组。
本发明解决上述技术问题所采用的技术方案为：一种透明单向出光光源模组，包括光源和导光板，所述的导光板包括入光面、第一表面和第二表面，其特征在于所述的第一表面上设置有贴合层，所述的导光板的折射率大于所述的贴合层的折射率。
所述的导光板的折射率最好大于所述的贴合层的折射率0.05以上。
所述的导光板为楔形导光板，所述的入光面与所述的第一表面的夹角在为80～100度。
所述的楔形导光板的第二表面设置有保护层，所述的贴合层的折射率大于所述的保护层的折射率。
所述的楔形导光板朝向所述的光源的一侧一体设置有喇叭状的第一辅助导光板。
所述的贴合层的非贴合面设置有倒梯形的准直微棱镜阵列。
所述的导光板为平行导光板，所述的第二表面上设置有锯齿形微结构，所述的导光板朝向所述的光源的一侧一体设置有第二辅助导光板，所述的第二辅助导光板与所述的第二表面同侧的面上设置有辅助锯齿形微结构，所述的锯齿形微结构与所述的辅助锯齿形微结构的锯齿方向相反。
所述的导光板为平行导光板，所述的第一表面上设置有锯齿形微结构，所述的贴合层充满所述的锯齿形微结构，所述的导光板朝向所述的光源的一侧一体设置有第二辅助导光板，所述的第二辅助导光板与所述的第一表面同侧的面上设置有辅助锯齿形微结构，所述的锯齿形微结构与所述的辅助锯齿形微结构的锯齿方向相反。
与现有技术相比，本发明的优点在于各组件的结构简单，制作难度和成本较小，能够有效地实现单面出光，且所产生的扩大截面的平行光束准直性好，整体模组透明度极高，与其他技术具有极大的兼容性。
附图说明
图1为专利US20180052274A1的结构示意图；
图2为专利CN 109031512 A的结构示意图；
图3为专利CN 108519637 A的结构示意图；
图4为本发明实施例一的结构示意图；
图5为本发明实施例一的应用示例的结构示意图；
图6为本发明实施例二的结构示意图；
图7为本发明实施例三的结构示意图；
图8本发明实施例四的结构示意图；
图9为本发明实施例五的结构示意图。
图10为本发明实施例六的结构示意图。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
实施例一：如图4所示，一种透明单向出光光源模组，包括光源1和楔形导光板2，楔形角为γ，楔形导光板2包括入光面20、第一表面21和第二表面22，第一表面21上设置有贴合层3，楔形导光板2的材料选择折射率为1.5～1.7的PC、PMMA或玻璃，大于贴合层3的折射率0.05以上，贴合层3的材料可以选择折射率为1.5～1.3PMMA、硅胶、丙烯酸树脂或环氧树脂等，光源1出射的光线进入楔形导光板2，光线201到达楔形导光板2与贴合层3的交界处第一表面21时，其入射角为α，当α大于两种材料的全反射角时，光线在楔形导光板2内传播，由于楔形结构会使光线入射角α以2γ倍的速度逐渐变小，因此当入射角α小于两种材料的全反射角时，光线出射进入贴合层3。由于光线201进入贴合层3中为刚刚破坏全反射条件，因此出射角β为接近90°的大角度准直光线，最终进入显示系统中。由于楔形角度γ限制其出射角度，因此所有出射光线的入射角度均不超过(全反射角-2γ)度内，因此所有出射光线均为准直大角度出射光线，又因为另一面22无贴合，为空气介质，因此当入射角α不满足第一表面21的全反射角时，但仍然满足第二表面22空气与楔形导光板2材料的全反射角，因此其能够做到单面出光，由于楔形导光板2角度γ极小，且表面并无其他出光结构，因此整体模组透明度极高。
作为本实施例的一个示例如图5所示，在贴合层3的非贴合面31上设置有显示器4。
实施例二：如图6所示，在实施例一的基础上，在楔形导光板2背向贴合层3的第二表面22一侧设置保护层5，保护层5的折射率低于贴合层的折射率，因此对于楔形导光板2中的光线，其对于贴合层3在第一表面21上的全反射角α要大于保护层5在第二表面22上的全反射角Ω，因此光线202在第二表面22上时会发生全反射，但在第一表面21上时有可能不会发生全反射。由于每次全反射后，光线202趋近全反射角的速度为2γ度，所以全反射角α只需大于全反射角Ω角度2γ度即可，即
α-Ω≥2γ
所以保护层5的折射率n 2与贴合层3的折射率n 1以及楔形导光板的折射率n，只需满足以下关系即可
arcsin(n 1/n)-arcsin(n 2/n)≥2γ
存在保护层5后，整体模组可以继续贴合其他结构而不影响其光学效果，能够适应全贴合的工艺要求。
实施例三：如图7所示，在实施例一的基础上，在楔形导光板2朝向光源1的一侧一体设置喇叭状的第一辅助导光板6，喇叭口夹角角度为θ，其包含两个辅助面23和24，光线照射到辅助面23和24上会使光线得到有效准直，光线301照射到辅助面23上，在23面上发生全反射，其行进角度按逆时针方向偏折θ度，光线302照射到辅助面24上，在24面上发生全反射，其行进角度按顺时针方向偏折θ度，因此光线301和302经过辅助面23和24后得到准直，之后光线达到第一表面21，其光线301和302相对于第一表面21的入射角α 1和α 2与原来相比将会增大，更加满足第一表面21的全反射条件，极大提高整体系统效率，同时，光线301和302更加接近于0度光线，照射到第一表面21的范围更向尾端移动，更加有利于系统均匀性的调整。
实施例四：如图8所示，在贴合层3的表面31设置倒梯形的准直微棱镜阵列50，将使得大角度光线601等经过倒梯形的准直微棱镜阵列50的准直，垂直出射，光线601能够在导光板2出射，是因为光线未满足第一表面21的全反射条件，但是由于导光板2的楔角γ极小，因此光线601的出射角度范围仅在楔角γ范围内，所以类似光线601的所有光线为高度准直光线，光线601经过贴合层3后，光线601经过贴合层3与准直微棱镜阵列50的接触面31进入准直微棱镜阵列50，光线601进入准直微棱镜阵列50后，照射到表面51上，在表面51发生全反射，光线601经过表面52，垂直出射，其光线601在进入倒梯形的准直微棱镜阵列50前的角度准直度极高，具有良好的单向准直出光特性，准直微棱镜阵列50可以根据光线601的角度，调整表面51的角度，使光线601能够在表面52垂直出射，准直微棱镜阵列50也可以为二维阵列，对两个维度的光线进行准直。
实施例五：如图9所示，导光板2为平行导光板，第二表面22上设置有第一锯齿形微结构25，第一锯齿的顶角为γ，导光板2朝向光源1的一侧一体设置有平板状的第二辅助导光板7，平板状的第二辅助导光板7与第二表面22同侧的面上设置有第二锯齿形微结构26，第二锯齿的顶角为θ，光线701照射到第二锯齿形微结构26的锯齿面上，在其表面发生全反射，全反射后光线701的行进角度按顺时针方向偏折θ度，光线701更加接近于零度光线，因此，第二锯齿形微结构26与实施例三中喇叭口结构功能一致； 之后光线701照射到第一表面21上发生全反射继续向前传输，之后照射到第一锯齿形微结构25的锯齿面上，在其表面发生全反射，光线按逆时针方向偏折γ度，之后继续照射到第一表面21上，光线701对于第一表面21的入射角较之前减少2γ度，当其入射角小于全反射角时，光线701在第一表面21上出射，进入后续光学结构，因此第一锯齿形微结构25能够完成实施例1中楔形板的功能。一般来说，第一锯齿形微结构25与第二锯齿形微结构26的锯齿方向相反。本实施例中，将实施例三的楔形导光板2与喇叭状的第一辅助导光板6等效为相同角度的锯齿形微结构，在一些极薄或工艺要求的场景，可以采用此替代方案进行设计加工，具有极高的可加工性，利于大规模生产。
实施例六：如图10所示，导光板2为平行导光板，第一表面21上设置有第一锯齿形微结构25，贴合层3充满第一锯齿形微结构25，导光板2朝向光源1的一侧一体设置有平板状的第二辅助导光板7，第二辅助导光板7与第一表面21同侧的面上设置有第二锯齿形微结构26，第一锯齿形微结构25与第二锯齿形微结构26的锯齿方向相反。由于锯齿形微结构会产生一定的雾度，为满足透明性要求，将锯齿性微结构使用贴合层材料填充，在不影响光学效果的前提下，极大的降低锯齿形微结构的雾度，使整体模组仍然具有极高的透明性。

Claims (8)

  1. 一种透明单向出光光源模组，包括光源和导光板，所述的导光板包括入光面、第一表面和第二表面，其特征在于所述的第一表面上设置有贴合层，所述的导光板的折射率大于所述的贴合层的折射率。
  2. 如权利要求1所述的一种透明单向出光光源模组，其特征在于所述的导光板的折射率大于所述的贴合层的折射率0.05以上。
  3. 如权利要求1所述的一种透明单向出光光源模组，其特征在于所述的导光板为楔形导光板，所述的入光面与所述的第一表面的夹角在为80～100度。
  4. 如权利要求3所述的一种透明单向出光光源模组，其特征在于所述的楔形导光板的第二表面设置有保护层，所述的贴合层的折射率大于所述的保护层的折射率。
  5. 如权利要求3所述的一种透明单向出光光源模组，其特征在于所述的楔形导光板朝向所述的光源的一侧一体设置有喇叭状的第一辅助导光板。
  6. 如权利要求1～5所述的一种透明单向出光光源模组，其特征在于所述的贴合层的非贴合面设置有倒梯形的准直微棱镜阵列。
  7. 如权利要求1所述的一种透明单向出光光源模组，其特征在于所述的导光板为平行导光板，所述的第二表面上设置有锯齿形微结构，所述的导光板朝向所述的光源的一侧一体设置有第二辅助导光板，所述的第二辅助导光板与所述的第二表面同侧的面上设置有辅助锯齿形微结构，所述的锯齿形微结构与所述的辅助锯齿形微结构的锯齿方向相反。
  8. 如权利要求1所述的一种透明单向出光光源模组，其特征在于所述的导光板为平行导光板，所述的第一表面上设置有锯齿形微结构，所述的贴合层充满所述的锯齿形微结构，所述的导光板朝向所述的光源的一侧一体设置有第二辅助导光板，所述的第二辅助导光板与所述的第一表面同侧的面上设置有辅助锯齿形微结构，所述的锯齿形微结构与所述的辅助锯齿形微结构的锯齿方向相反。
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