WO2019179426A1 - 光源模组和显示装置 - Google Patents

光源模组和显示装置 Download PDF

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Publication number
WO2019179426A1
WO2019179426A1 PCT/CN2019/078678 CN2019078678W WO2019179426A1 WO 2019179426 A1 WO2019179426 A1 WO 2019179426A1 CN 2019078678 W CN2019078678 W CN 2019078678W WO 2019179426 A1 WO2019179426 A1 WO 2019179426A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
source module
wavelength
guide plate
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PCT/CN2019/078678
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English (en)
French (fr)
Inventor
盖欣
方立宇
刘淼
王征
杜景军
梁菲
董飞
孙凌宇
陈秀云
尹大根
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Publication of WO2019179426A1 publication Critical patent/WO2019179426A1/zh

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Classifications

    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/0015—Fastening arrangements intended to retain light sources
    • F21V19/002—Fastening arrangements intended to retain light sources the fastening means engaging the encapsulation or the packaging of the semiconductor device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a light source module and a display device including the same.
  • Reflective display devices can use ambient light to display images without the need for a backlight module. This provides advantages such as low power consumption.
  • the reflective display device is difficult to display a clear picture in an environment where the light is insufficient.
  • a light source module includes: a light guide plate having a light emitting surface, a back surface opposite to the light emitting surface, and a light incident surface connecting the light emitting surface and the back surface;
  • a fluorescent layer disposed on the light incident surface; and a light emitting assembly comprising: at least one light source disposed on a side of the light incident surface and spaced apart from the light entrance surface, wherein the at least one light source is configured to be Transmitting light of a first wavelength; and at least one package structure encapsulating the at least one light source, respectively.
  • Each of the at least one package structure is provided with a corresponding double slit structure such that light of the first wavelength interferes to form interference fringes after passing through the respective double slit structure.
  • the phosphor layer is configured to be excited to emit light of a second wavelength when illuminated by light of the interference fringes, the light of the second wavelength being mixed with light of the first wavelength to produce via the incident light The white light entering the light guide plate.
  • the second wavelength is greater than the first wavelength.
  • the light of the first wavelength comprises blue light and the light of the second wavelength comprises yellow light.
  • the light source module further includes a transparent waterproof layer disposed on a side of the fluorescent layer facing the light emitting component.
  • the light source module further includes a light receiving plate disposed on a side of the fluorescent layer facing the light emitting component.
  • the light receiving plate is configured to form the interference fringes thereon and direct the light of the interference fringes to the fluorescent layer.
  • the light source module further includes a transparent waterproof layer disposed on a side of the fluorescent layer facing the light emitting component.
  • the transparent waterproof layer is disposed between the fluorescent layer and the light receiving plate.
  • the light receiving plate is disposed between the transparent waterproof layer and the fluorescent layer.
  • each of the at least one package structure opens the respective double slit structure on a side facing the light guide plate.
  • the light source module further includes a reflector disposed on a side of the light emitting assembly away from the light guide plate.
  • Each of the at least one package structure opens the respective double slit structure on a side facing the reflector such that light of the first wavelength is passed after passing through the respective double slit structure The reflector is reflected towards the phosphor layer.
  • the reflector is arranged to face the at least one light source such that a reflective surface of the reflector is at an angle to a thickness direction of the light guide plate, the angle being in the range of 25 to 45 degrees.
  • a display device comprising: the light source module as described above; and a display panel.
  • the light source module is configured to provide display illumination to the display panel.
  • the display panel comprises a reflective display panel.
  • the light guide plate is disposed on a display side of the reflective display panel, and displays an image via the reflective display panel on the display side.
  • the light emitting surface of the light guide plate faces the display side of the reflective display panel.
  • FIG. 1 is a schematic cross-sectional view of a reflective display device in the related art
  • FIG. 2 is a schematic cross-sectional view of a light source module in accordance with an embodiment of the present disclosure
  • Figure 3 is a schematic cross-sectional view of a variation of the light source module according to Figure 2;
  • FIG. 4 is a schematic plan view of a light source module in accordance with an embodiment of the present disclosure.
  • FIG. 5 is a schematic view illustrating the principle of the light source module of FIG. 4;
  • FIG. 6 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic cross-sectional view of a display device according to another embodiment of the present disclosure.
  • first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/ Some should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer Thus, a first element, component, region, layer, or section, which is discussed below, may be referred to as a second element, component, region, layer or section without departing from the teachings of the disclosure.
  • under and under can encompass both the ⁇ RTIgt; Terms such as “before” or “before” and “after” or “following” may be used, for example, to indicate the order in which light passes through the elements.
  • the device can be oriented in other ways (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein interpreted accordingly.
  • a layer is referred to as “between two layers,” it may be a single layer between the two layers, or one or more intermediate layers may be present.
  • the reflective display device includes a rear case 1a, a reflective display panel 2a, and a light source module.
  • the rear case 1a serves as a backing plate in this example, on which the reflective display panel 2a and the light source module, and potentially other components are mounted.
  • a reflective display panel 2a such as a reflective liquid crystal display panel, is provided on the rear case 1a.
  • the light source module includes a light guide plate 3a, a circuit board 4a (for example, a PCB), and a plurality of light sources 5a (for example, LEDs) on the circuit board 4a. For convenience of illustration, only one of the plurality of light sources 5a is shown.
  • the light guide plate 3a is provided on the display side (in the example, the upper surface) of the display panel 2a, and an image is displayed via the display side display panel 2a. Light emitted from the LED light source 5a is guided into the display panel 2a by the light guide plate 3a to provide display illumination.
  • the limited illumination range (ie, the divergence angle) of the LED light source 5a Due to the limited illumination range (ie, the divergence angle) of the LED light source 5a, the brightness at the boundary of the illumination range of the adjacent two LED light sources 5a is low, so that a so-called hotspot occurs in the area of the light guide plate 3a close to the LED light source 5a (ie, the light and dark are not (even), which ultimately leads to an undesirable display effect.
  • the light source module includes a light guide plate 1, a light emitting assembly 2, and a fluorescent layer 3.
  • the light guide plate 1 has a flat shape, for example, a rectangular parallelepiped shape.
  • the light guide plate 1 has a light-emitting surface (for example, a lower surface), a back surface (for example, an upper surface) opposite to the light-emitting surface, and a plurality of side surfaces that connect the light-emitting surface and the back surface.
  • the side of the light guide plate 1 opposite to the light-emitting assembly 2 is referred to as a light-incident surface.
  • Light from the light-emitting assembly 2 enters the light guide plate 1 via the light incident surface, and is guided to the light exit surface, and then exits the light guide plate 1 via the light exit surface.
  • a surface having the largest area among the respective surfaces of the light guide plate 1 (for example, an upper surface or a lower surface) is referred to as a main surface, and a direction perpendicular to the main surface is defined as a thickness direction of the light guide plate 1.
  • the lighting assembly 2 includes a light source 22 and a package structure 23 that encapsulates the light source 22.
  • the lighting assembly 2 further includes a substrate 21 on which the light source 22 and the package structure 23 are disposed.
  • the light source 22, for example, an LED, is disposed on the light incident surface side of the light guide plate 1 and spaced apart from the light incident surface space.
  • Light source 22 is configured to emit light of a first wavelength, such as blue light having a wavelength of 400 nm to 500 nm.
  • the package structure 23 is provided with a double slit structure 231 including two slits 2311. The double slit structure 231 causes light emitted from the light source 22 to interfere after passing through the double slit structure 231 to form interference fringes.
  • the interference fringes include bright streaks and dark streaks.
  • Each of the bright stripes can serve as a light source, so that the light entering the light guide plate 1 via the light incident surface is more uniform, which is advantageous for alleviating or even eliminating the hotspot.
  • the fluorescent layer 3 is disposed on the light incident surface of the light guide plate 1.
  • the fluorescent layer 3 is excited to emit light of a second wavelength when receiving light of interference fringes, for example, yellow light having a wavelength of 570 nm to 600 nm.
  • the light of the second wavelength is mixed with the light of the first wavelength to generate white light entering the light guide plate 1 via the light incident surface.
  • the phosphor layer 3 may be a fluorescent film applied to the light incident surface, or it may be a transparent fluorescent plate attached to the light incident surface.
  • the fluorescent material in the fluorescent layer 3 may be, for example, a yellow phosphor or a mixed material containing a yellow fluorescent material, for example, doped with a red phosphor or the like.
  • the phosphor layer 3 may not include the yellow phosphor, but only the red phosphor or other fluorescent material, as long as the phosphor layer 3 emits the second wavelength of light and the emitted light when excited.
  • the light of the first wavelength of the component 2 is mixed to produce the desired mixed light. This provides an inexpensive display lighting solution.
  • the light source module may further include a waterproof layer 4 disposed on a side of the fluorescent layer 3 facing the light emitting assembly 2, as shown in FIG.
  • the waterproof layer 4 may be a film or coating formed of a transparent and waterproof material for preventing the fluorescent layer 3 from being wetted or peeled off.
  • the light source module may further include a light receiving plate 5.
  • Light from which the interference has occurred from the light-emitting assembly 2 is received by the light receiving plate 5 and the interference fringes are formed on the light receiving plate 5.
  • the light receiving plate 5 then directs the light of the interference fringes to the fluorescent layer 3.
  • the light receiving plate 5 can function as a light diffuser to further improve the uniformity of incident light.
  • the light receiving plate 5 may be made of a transparent material such as the same material as the light guide plate 1. In the example of FIG. 2, the light receiving plate 5 is disposed on the side of the waterproof layer 4 facing the light emitting assembly 2 such that the waterproof layer 4 is located between the light receiving plate 5 and the fluorescent layer 3.
  • Fig. 3 is a schematic cross-sectional view showing a modification of the light source module according to Fig. 2.
  • the light receiving plate 5 is provided on the fluorescent layer 3, and the waterproof layer 4 is provided on the light receiving plate 5. Therefore, the light receiving plate 5 is located between the waterproof layer 4 and the fluorescent layer 3.
  • the two slits 2311 of the double slit structure 231 are shown as juxtaposed along the thickness direction of the light guide plate 1 in FIGS. 2 and 3, this is merely exemplary and illustrative.
  • the two slits 2311 are arranged side by side in a direction parallel to the light incident surface of the light guide plate 1, and extend in the thickness direction of the light guide plate 1, as is more clearly shown in FIG.
  • the substrate 21 is a strip-shaped plate, such as a PCB board, which is substantially parallel to the light incident surface of the light guide plate 1.
  • a plurality of light sources 22, for example, blue LEDs, are provided on a side of the substrate 21 facing the light guide plate 1.
  • the plurality of light sources 22 are evenly distributed on the substrate 21 at regular intervals.
  • light source 22 can also emit light of other colors than blue.
  • a plurality of package structures 23 enclose respective ones of the plurality of light sources 22 such that each of the package structures 23 is provided with a light source 22.
  • Each of the package structures 23 is provided with a double slit structure 231, and the double slit structure 231 includes two slits 2311.
  • Young's double slit interference light emitted from the light source 22 interferes after passing through the double slit structure 231, and interference fringes A are formed on the light receiving plate 5, as will be explained in more detail below.
  • each small square marked with reference symbol A indicates a bright stripe, and each bright stripe can serve as a light source. Since the bright stripes are arranged more tightly than the light source 22, it is equivalent to increasing the number of the light sources 22, thereby improving the uniformity of illumination.
  • FIG. 5 is a schematic diagram illustrating the principle of the light source module of FIG. 4.
  • the spacing ⁇ X of the interference fringes can be adjusted by adjusting D and d to obtain more uniform interference fringes.
  • FIG. 6 is a schematic cross-sectional view of a display device in accordance with an embodiment of the present disclosure. As shown in FIG. 6, the display device includes a rear case 100, a display panel 200, and a light source module according to any of the above embodiments.
  • a display panel 200 which in this example is a reflective display panel, is secured to the rear case 100.
  • the display panel 200 has a display side (in this example, an upper surface) through which an image is displayed.
  • the substrate 21, the light source(s) 22, and the package structure(s) 23 in the light-emitting assembly are each fixed to the rear case 100.
  • the light guide plate 1 is attached to the display side of the display panel 200, and its light emitting surface (in this example, the lower surface) faces the display side of the reflective display panel.
  • the display device further includes a front frame 300.
  • the front frame 300 can be disposed around the rear case 100 one week.
  • the light emitting assembly 2 is located in a space surrounded by the front frame 300 and the rear case 100.
  • FIG. 7 is a schematic cross-sectional view of a display device according to another embodiment of the present disclosure.
  • the light source module further includes a reflector 6, such as a reflective lens.
  • the reflector 6 is disposed on a side of the light emitting assembly that is away from the light guide plate 1.
  • the reflector 6 is fixedly coupled to the rear case 100.
  • the double slit structure 231 is provided on the side of the package structure 23 facing the reflector 6 such that light emitted from the light source(s) 22 passes through (one or more The double slit structure 231 is then reflected by the reflector 6 toward the phosphor layer 3.
  • the reflector 6 is arranged to face the light source(s) 22 such that the reflective surface of the reflector 6 is at an angle to the thickness direction of the light guide plate 1, for example at 25 to 45 degrees Within the scope. This angle may vary depending on the specific configuration.
  • the display device is illustrated as a reflective display device in the embodiment of Figures 6 and 7, in other embodiments, the display device can be a transmissive display device.
  • the display device includes the light source module and the transmissive display panel according to any of the above embodiments, wherein the light guide plate 1 is disposed on the back side of the display panel, that is, opposite to the display side of the display panel. One side.
  • the display device embodiments described in conjunction with FIGS. 6 and 7 can provide the same advantageous effects as the light source module embodiments described above in connection with FIGS. 2 through 5, and are not described herein again.

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Abstract

一种光源模组，包括导光板（1）、设于导光板入光面上的荧光层（3）、以及发光组件（2）。发光组件（2）包括至少一个光源（22），设置在入光面一侧且与入光面空间相隔；以及至少一个封装结构（23），分别封装至少一个光源（22）。至少一个光源（22）被被配置成发射第一波长的光。至少一个封装结构（23）中的每一个开设有相应的双缝结构（231），使得第一波长的光在穿过相应的双缝结构之后发生干涉而形成干涉条纹。荧光层（3）被配置成在被干涉条纹的光照射时受激发而发射第二波长的光。第二波长的光与第一波长的光混合以产生经由入光面进入导光板（1）的白光。

Description

光源模组和显示装置
相关申请的交叉引用
本申请要求2018年3月20日提交的中国专利申请No.201810227940.2的优先权，其全部公开内容通过引用合并于此。
技术领域
本公开涉及显示技术领域，尤其涉及一种光源模组和包括该光源模组的显示装置。
背景技术
随着显示技术的发展，出现了越来越多种类的显示装置。反射式显示装置可利用环境光来显示图像，而无需背光模组。这提供了低功耗等优点。但是，反射式显示装置在光线不充足的环境下难以显示清晰画面。
发明内容
根据本公开的一方面，提供了一种光源模组，包括：导光板，具有出光面、与所述出光面相对的背面、以及连接所述出光面和所述背面的入光面；
荧光层，设置在所述入光面上；以及发光组件，包括：至少一个光源，设置在所述入光面一侧且与所述入光面空间相隔，其中所述至少一个光源被配置成发射第一波长的光；以及至少一个封装结构，分别封装所述至少一个光源。所述至少一个封装结构中的每一个开设有相应的双缝结构，使得所述第一波长的光在穿过所述相应的双缝结构之后发生干涉而形成干涉条纹。所述荧光层被配置成在被所述干涉条纹的光照射时受激发而发射第二波长的光，所述第二波长的光与所述第一波长的光混合以产生经由所述入光面进入所述导光板的白光。
在一些实施例中，所述第二波长大于所述第一波长。
在一些实施例中，所述第一波长的光包括蓝光，并且所述第二波长的光包括黄光。
在一些实施例中，所述光源模组还包括设置于所述荧光层的朝向所述发光组件的一侧的透明防水层。
在一些实施例中，所述光源模组还包括设置于所述荧光层的朝向所述发光组件的一侧的光接收板。所述光接收板被配置成在其上形成 所述干涉条纹，并将所述干涉条纹的光导向所述荧光层。
在一些实施例中，所述光源模组还包括设置于所述荧光层的朝向所述发光组件的一侧的透明防水层。
在一些实施例中，所述透明防水层设置在所述荧光层与所述光接收板之间。
在一些实施例中，所述光接收板设置在所述透明防水层与所述荧光层之间。
在一些实施例中，所述至少一个封装结构中的每一个在朝向所述导光板的一侧开设所述相应的双缝结构。
在一些实施例中，所述光源模组还包括设于所述发光组件的远离所述导光板一侧的反射器。所述至少一个封装结构中的每一个在朝向所述反射器的一侧开设所述相应的双缝结构，使得所述第一波长的光在穿过所述相应的双缝结构之后被所述反射器朝向所述荧光层反射。
在一些实施例中，所述反射器被布置成朝向所述至少一个光源，使得所述反射器的反射面与所述导光板的厚度方向成一角度，该角度在25至45度的范围内。
根据本公开的另一方面，提供了一种显示装置，包括：如上所述的光源模组；和显示面板。所述光源模组被配置成向所述显示面板提供显示照明。
在一些实施例中，所述显示面板包括反射式显示面板。所述导光板设置在所述反射式显示面板的显示侧，经由该显示侧所述反射式显示面板显示图像。所述导光板的出光面朝向所述反射式显示面板的显示侧。
附图说明
通过结合附图考虑以下对本公开的实施例的详细说明，本公开的各种目标、特征和优点将变得更加清楚明白。附图仅为本公开的示范性图解，并非一定是按比例绘制。贯穿附图，同样的附图标记表示相同或类似的部件，其中：
图1是相关技术中的反射式显示装置的示意性截面图；
图2是根据本公开实施例的光源模组的示意性截面图；
图3是根据图2的光源模组的变型的示意性截面图；
图4是根据本公开实施例的光源模组的示意性俯视图；
图5是图示说明图4的光源模组的原理的示意图；
图6是根据本公开实施例的显示装置的示意性截面图；并且
图7是根据本公开另一实施例的显示装置的示意性截面图。
具体实施方式
将理解的是，尽管术语第一、第二、第三等等在本文中可以用来描述各种元件、部件、区、层和/或部分，但是这些元件、部件、区、层和/或部分不应当由这些术语限制。这些术语仅用来将一个元件、部件、区、层或部分与另一个区、层或部分相区分。因此，下面讨论的第一元件、部件、区、层或部分可以被称为第二元件、部件、区、层或部分而不偏离本公开的教导。
诸如“在...下面”、“在...之下”、“较下”、“在...下方”、“在...之上”、“较上”等等之类的空间相对术语在本文中可以为了便于描述而用来描述如图中所图示的一个元件或特征与另一个(些)元件或特征的关系。将理解的是，这些空间相对术语意图涵盖除了图中描绘的取向之外在使用或操作中的器件的不同取向。例如，如果翻转图中的器件，那么被描述为“在其他元件或特征之下”或“在其他元件或特征下面”或“在其他元件或特征下方”的元件将取向为“在其他元件或特征之上”。因此，示例性术语“在...之下”和“在...下方”可以涵盖在...之上和在...之下的取向两者。诸如“在...之前”或“在...前”和“在...之后”或“接着是”之类的术语可以类似地例如用来指示光穿过元件所依的次序。器件可以取向为其他方式(旋转90度或以其他取向)并且相应地解释本文中使用的空间相对描述符。另外，还将理解的是，当层被称为“在两个层之间”时，其可以是在该两个层之间的唯一的层，或者也可以存在一个或多个中间层。
本文中使用的术语仅出于描述特定实施例的目的并且不意图限制本公开。如本文中使用的，单数形式“一个”、“一”和“该”意图也包括复数形式，除非上下文清楚地另有指示。将进一步理解的是，术语“包括”和/或“包含”当在本说明书中使用时指定所述及特征、整体、步骤、操作、元件和/或部件的存在，但不排除一个或多个其他特征、整体、步骤、操作、元件、部件和/或其群组的存在或添加一个或多个其他特征、整体、步骤、操作、元件、部件和/或其群组。如本文中使用的，术语“和/或”包括相关联的列出项目中的一个或多个的 任意和全部组合。
将理解的是，当元件或层被称为“在另一个元件或层上”、“连接到另一个元件或层”、“耦合到另一个元件或层”或“邻近另一个元件或层”时，其可以直接在另一个元件或层上、直接连接到另一个元件或层、直接耦合到另一个元件或层或者直接邻近另一个元件或层，或者可以存在中间元件或层。相反，当元件被称为“直接在另一个元件或层上”、“直接连接到另一个元件或层”、“直接耦合到另一个元件或层”、“直接邻近另一个元件或层”时，没有中间元件或层存在。然而，在任何情况下“在...上”或“直接在...上”都不应当被解释为要求一个层完全覆盖下面的层。
本文中参考本公开的理想化实施例的示意性图示(以及中间结构)描述本公开的实施例。正因为如此，应预期例如作为制造技术和/或公差的结果而对于图示形状的变化。因此，本公开的实施例不应当被解释为限于本文中图示的区的特定形状，而应包括例如由于制造导致的形状偏差。因此，图中图示的区本质上是示意性的，并且其形状不意图图示器件的区的实际形状并且不意图限制本公开的范围。
除非另有定义，本文中使用的所有术语(包括技术术语和科学术语)具有与本公开所属领域的普通技术人员所通常理解的相同含义。将进一步理解的是，诸如那些在通常使用的字典中定义的之类的术语应当被解释为具有与其在相关领域和/或本说明书上下文中的含义相一致的含义，并且将不在理想化或过于正式的意义上进行解释，除非本文中明确地如此定义。
图1是相关技术中的反射式显示装置的示意性截面图。如图1所示，该反射式显示装置包括后壳1a、反射式显示面板2a及光源模组。
后壳1a在该示例中充当背板，其上安装反射式显示面板2a和光源模组，以及潜在地其他元件。
反射式显示面板2a，例如反射式液晶显示面板，设于后壳1a上。
光源模组包括导光板3a、电路板4a(例如PCB)和电路板4a上的多个光源5a(例如LED)。为了图示的方便，多个光源5a中仅一个被示出。导光板3a设于显示面板2a的显示侧(在示例中，上表面)，经由该显示侧显示面板2a显示图像。从LED光源5a发射的光被导光板3a导入显示面板2a中，提供显示照明。
由于LED光源5a的有限的照射范围(即发散角)，相邻两个LED光源5a的照射范围的边界处亮度较低，使得导光板3a靠近LED光源5a的区域出现所谓的hotspot(即明暗不均)，最终导致不合期望的显示效果。
图2是根据本公开实施例的光源模组的示意性截面图。如图2所示，光源模组包括导光板1、发光组件2和荧光层3。
在该实施例中，导光板1呈平板状，例如是长方体的形状。具体地，导光板1具有出光面(例如，下表面)、与出光面相对的背面(例如，上表面)和连接出光面和背面的多个侧面。在图2中，导光板1的与发光组件2相对的侧面被称为入光面。来自发光组件2的光经由入光面进入导光板1，并且被导向出光面，并且然后经由出光面离开导光板1。在该示例中，导光板1的各表面中具有最大面积的表面(例如，上表面或下表面)被称为主表面，并且垂直于主表面的方向被定义为导光板1的厚度方向。
发光组件2包括光源22和封装光源22的封装结构23。在该示例中，发光组件2还包括基板21，其上设置光源22和封装结构23。光源22，例如LED，设置在导光板1的入光面一侧且与所述入光面空间相隔。光源22被配置成发射第一波长的光，例如具有400nm至500nm的波长的蓝光。封装结构23开设有包括两个狭缝2311的双缝结构231。双缝结构231使得从光源22发射的光在穿过双缝结构231之后发生干涉而形成干涉条纹。如后面将描述的，所述干涉条纹包括亮条纹和暗条纹。亮条纹中的每一个可以充当一个光源，使得经由入光面进入导光板1的光更加均匀，有利于缓解或甚至消除hotspot。
荧光层3设置于导光板1的入光面上。荧光层3在接收到干涉条纹的光时受激发而发射第二波长的光，例如具有570nm至600nm的波长的黄光。所述第二波长的光与所述第一波长的光混合以产生经由所述入光面进入导光板1的白光。作为示例而非限制，该荧光层3可以是涂覆于该入光面的荧光膜，或者它也可以是附接于入光面的透明的荧光板。荧光层3中的荧光材料可以例如是黄色的荧光粉，或者是包含黄色荧光材料的混合材料，例如，掺杂了红色荧光粉等。当然，在一些实施例中，荧光层3也可以不包括黄色荧光粉，而是只包括红色荧光粉或其它荧光材料，只要该荧光层3在受激发时发射的第二波 长的光与来自发光组件2的第一波长的光混合产生期望的混合光即可。这提供了一种廉价的显示照明解决方案。
为了保护荧光层3的目的，光源模组还可以包括设置于所述荧光层3的朝向所述发光组件2的一侧的防水层4，如图2所示。该防水层4可以是透明且防水的材料所形成的薄膜或者涂层，用于防止荧光层3受潮或脱落。
在一些实施例中，光源模组还可以包括光接收板5。来自发光组件2的发生了干涉的光被光接收板5接收并且所述干涉条纹被形成在光接收板5上。光接收板5然后将干涉条纹的光导向所述荧光层3。光接收板5可以充当光漫射器，以进一步提高入射光的均匀性。光接收板5可以由透明材料制成，例如与导光板1相同的材料。在图2的示例中，光接收板5设置在防水层4朝向发光组件2的一侧，使得防水层4位于光接收板5和荧光层3之间。
图3是根据图2的光源模组的变型的示意性截面图。在该实施例中，光接收板5设于荧光层3上，并且防水层4设于光接收板5上。因此，光接收板5位于防水层4和荧光层3之间。
虽然双缝结构231的两个狭缝2311在图2和3中被示出为沿着导光板1的厚度方向并置，但是这只是示例性和说明性的。典型地，这两个狭缝2311沿着平行于导光板1的入光面的方向并排布置，并且沿着导光板1的厚度方向延伸，如在图4中更清楚地示出的。
图4是根据本公开实施例的光源模组的示意性俯视图。如图4所示，基板21是条状的板，例如PCB板，与导光板1的入光面基本平行。
多个光源22，例如蓝色的LED，设于基板21朝向导光板1的一侧。在该示例中，多个光源22以固定的间隔均匀地分布在基板21上。在各实施例中，光源22也可以发射蓝色之外的其它颜色的光。
多个封装结构23封装多个光源22中的相应光源，使得每个封装结构23内均设有一个光源22。每个封装结构23上设有双缝结构231，该双缝结构231包括两个狭缝2311。根据杨氏双缝干涉的原理，从光源22发出的光穿过双缝结构231后发生干涉，并且在光接收板5上形成干涉条纹A，如下面将更详细解释的。
在图4中，被标记有参考符号A的每个小方块指示一个亮条纹，并且每个亮条纹可充当一个光源。由于亮条纹排列得比光源22更加紧 密，相当于增加了光源22的数量，从而改进照明的均匀性。
图5是图示说明图4的光源模组的原理的示意图。如图5所示，根据杨氏双缝干涉的原理，可得出ΔX＝(D/d)×λ，其中ΔX为光接收板5产生的干涉条纹A的间距，D为双缝结构231与光接收板5之间的距离，d为两个狭缝2311之间的距离，并且λ为从光源22发出的光的波长。可以通过调节D和d来调节干涉条纹的间距ΔX，得到更加均匀的干涉条纹。
图6是根据本公开实施例的显示装置的示意性截面图。如图6所示，该显示装置包括后壳100、显示面板200和根据上述实施例中的任一个的光源模组。
显示面板200，其在该示例中为反射式显示面板，固定于后壳100。显示面板200具有显示侧(在该示例中，上表面)，经由该显示侧显示面板200显示图像。
发光组件中的基板21、(一个或多个)光源22和(一个或多个)封装结构23均固定于后壳100。
导光板1贴合于显示面板200的显示侧，并且它的出光面(在该示例中，下表面)朝向所述反射式显示面板的显示侧。
此外，该显示装置还包括前框300。前框300可环绕后壳100一周设置。发光组件2位于前框300和后壳100围成的空间内。
图7是根据本公开另一实施例的显示装置的示意性截面图。如图7所示，光源模组还包括反射器6，例如反射镜片。反射器6设于发光组件的远离导光板1的一侧。在该示例中，反射器6与后壳100固定连接。
(一个或多个)双缝结构231设于(一个或多个)封装结构23的朝向反射器6的一侧，使得从(一个或多个)光源22射出的光在穿过(一个或多个)双缝结构231之后被反射器6朝向荧光层3反射。
在一些实施例中，反射器6被布置成朝向(一个或多个)光源22，使得所述反射器6的反射面与导光板1的厚度方向成一角度，该角度在例如25至45度的范围内。该角度可能根据具体配置而变化。
虽然该显示装置在图6和7的实施例中被示出为反射式显示装置，但是在其他实施例中，该显示装置可以是透射式显示装置。在这样的实施例中，该显示装置包括根据上述实施例中的任一个的光源模组和 透射式显示面板，其中导光板1设于显示面板的背侧，即与显示面板的显示侧相对的一侧。
结合图6和7描述的显示装置实施例可以提供与上面结合图2至5描述的光源模组实施例相同的有益效果，在此不再赘述。
通过研究附图、公开内容和所附的权利要求书，本领域技术人员在实践所要求保护的主题时，能够理解和实现对于所公开的实施例的变型。在权利要求书中，词语“包括”不排除其他元件或步骤，并且不定冠词“一”或“一个”不排除多个。在相互不同的从属权利要求中记载了某些措施的仅有事实并不表明这些措施的组合不能用来获利。

Claims (13)

  1. 一种光源模组，包括：
    导光板，具有出光面、与所述出光面相对的背面、以及连接所述出光面和所述背面的入光面；
    荧光层，设置在所述入光面上；以及
    发光组件，包括：
    至少一个光源，设置在所述入光面一侧且与所述入光面空间相隔，其中所述至少一个光源被配置成发射第一波长的光；以及
    至少一个封装结构，分别封装所述至少一个光源，其中所述至少一个封装结构中的每一个开设有相应的双缝结构，使得所述第一波长的光在穿过所述相应的双缝结构之后发生干涉而形成干涉条纹，
    其中所述荧光层被配置成在被所述干涉条纹的光照射时受激发而发射第二波长的光，所述第二波长的光与所述第一波长的光混合以产生经由所述入光面进入所述导光板的白光。
  2. 根据权利要求1所述的光源模组，其中所述第二波长大于所述第一波长。
  3. 根据权利要求2所述的光源模组，其中所述第一波长的光包括蓝光，并且其中所述第二波长的光包括黄光。
  4. 根据权利要求1所述的光源模组，还包括设置于所述荧光层的朝向所述发光组件的一侧的透明防水层。
  5. 根据权利要求1所述的光源模组，还包括设置于所述荧光层的朝向所述发光组件的一侧的光接收板，其中所述光接收板被配置成在其上形成所述干涉条纹，并将所述干涉条纹的光导向所述荧光层。
  6. 根据权利要求1所述的光源模组，还包括设置于所述荧光层的朝向所述发光组件的一侧的透明防水层。
  7. 根据权利要求6所述的光源模组，其中所述透明防水层设置在所述荧光层与所述光接收板之间。
  8. 根据权利要求6所述的光源模组，其中所述光接收板设置在所述透明防水层与所述荧光层之间。
  9. 根据权利要求1～8中任一项所述的光源模组，其中所述至少一个封装结构中的每一个在朝向所述导光板的一侧开设所述相应的双缝 结构。
  10. 根据权利要求1～8中任一项所述的光源模组，还包括设于所述发光组件的远离所述导光板一侧的反射器，其中所述至少一个封装结构中的每一个在朝向所述反射器的一侧开设所述相应的双缝结构，使得所述第一波长的光在穿过所述相应的双缝结构之后被所述反射器朝向所述荧光层反射。
  11. 根据权利要求10所述的光源模组，其中所述反射器被布置成朝向所述至少一个光源，使得所述反射器的反射面与所述导光板的厚度方向成一角度，该角度在25至45度的范围内。
  12. 一种显示装置，包括：
    权利要求1～11中任一项所述的光源模组；和
    显示面板，
    其中所述光源模组被配置成向所述显示面板提供显示照明。
  13. 根据权利要求12所述的显示装置，其中所述显示面板包括反射式显示面板，其中所述导光板设置在所述反射式显示面板的显示侧，经由该显示侧所述反射式显示面板显示图像，并且其中所述导光板的出光面朝向所述反射式显示面板的显示侧。
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