WO2019184906A1 - 背光模组和显示设备 - Google Patents

背光模组和显示设备 Download PDF

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Publication number
WO2019184906A1
WO2019184906A1 PCT/CN2019/079664 CN2019079664W WO2019184906A1 WO 2019184906 A1 WO2019184906 A1 WO 2019184906A1 CN 2019079664 W CN2019079664 W CN 2019079664W WO 2019184906 A1 WO2019184906 A1 WO 2019184906A1
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WO
WIPO (PCT)
Prior art keywords
layer
light
prism
module
light guiding
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Application number
PCT/CN2019/079664
Other languages
English (en)
French (fr)
Inventor
孟宪东
王维
谭纪风
陈小川
高健
孟宪芹
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/497,524 priority Critical patent/US11131798B2/en
Publication of WO2019184906A1 publication Critical patent/WO2019184906A1/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
    • G02B6/0035—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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface 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
    • G02B6/005—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
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a backlight module and a display device.
  • the backlight source is generally an LED light source
  • the LED light source is a point light source, which is evenly distributed on the liquid crystal display panel.
  • LED light sources There are a plurality of LED light sources. Since the light energy of the LED light source is relatively concentrated, in the backlight display, the phenomenon of uneven brightness and darkness may occur, which affects the display effect.
  • the LED light source of the direct type display device in the related art improves the uniformity of the backlight display by preserving the light mixing distance and increasing the density of the LED light source, but this not only increases the thickness of the display device but also increases cost.
  • an embodiment of the present disclosure provides a backlight module, including:
  • the light source layer is provided with a plurality of light emitting units
  • a light guiding layer a side of the light guiding layer facing away from the light source layer is provided with a plurality of reflective prism units, and a plurality of the reflecting prism units are in one-to-one correspondence with positions of the plurality of the light emitting units, the reflective prism unit Constructing to reflect light emitted by the light emitting unit into the light guiding layer and causing total reflection of the reflected light within the light guiding layer;
  • the reflective prism unit includes: a first prism module, an orthographic projection of the first prism module on the light guiding layer is circular, a center of the circular orthographic projection and a light emission of the light emitting unit Corresponding to the center, the thickness of the first prism module decreases in order from the edge to the center of the circle.
  • the reflective prism unit further includes: at least one second prism module, wherein the second orthographic projection of each of the second prism modules on the light guiding layer is a circular shape, and the plurality of the second prisms An orthographic projection of the module on the light guiding layer sequentially surrounds an orthographic projection of the first prism module on the light guiding layer and is concentric with an orthographic projection of the first prism module on the light guiding layer It is provided that the thickness of each of the second prism modules decreases in order from the edge to the center of the circle.
  • a surface of the first prism module facing away from the light guiding layer is a first surface, and the first surface forms a first straight line in a radial cross section of the first prism module;
  • a face of each of the second prism modules that faces away from the light guiding layer is a second face, and each of the second faces forms a second straight line in a radial cross section of the second prism module.
  • an angle between the first straight line and the light guide plate is a first angle
  • an angle between the plurality of the second straight lines and the light guide plate is respectively a plurality of second angles
  • the angle of the first angle is greater than the angle of any one of the second angles, wherein a second angle of the second prism module adjacent to the first prism module is greater than a second angle of angle of the second prism module of a prism module.
  • first prism module and the plurality of the second prism modules are integrally formed structures.
  • the backlight module includes a diffusion layer disposed on a side of the mesh layer away from the light guiding layer.
  • the backlight module includes a prism film disposed on a side of the diffusion layer away from the dot layer.
  • the dot layer and the light source layer are respectively disposed on opposite side surfaces of the light guiding layer.
  • the dot layer and the light source layer are disposed on the same side of the light guiding layer.
  • the backlight module further includes:
  • a diffusion layer and a prism film disposed on a side of the dot layer away from the light guiding layer, wherein the prism film is disposed on a side of the diffusion layer away from the dot layer.
  • the backlight module further includes
  • a reflective layer disposed on a side of the light guiding layer facing away from the halftone layer.
  • the light source layer is disposed between the light guiding layer and the halftone layer, and a plurality of the reflective prism units are disposed between the reflective layer and the light guiding layer.
  • the light source layer is disposed between the reflective layer and the light guiding layer, and a plurality of the reflective prism units are disposed between the light guiding layer and the halftone layer.
  • an embodiment of the present disclosure further provides a display device including the above backlight module.
  • FIG. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure
  • FIG. 2 is a schematic cross-sectional view of a reflective prism unit according to an embodiment of the present disclosure
  • FIG. 3 is a top plan view of a reflective prism unit according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a principle of a backlight module according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of light propagation in a backlight module according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a backlight module according to another embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a backlight module, including:
  • the light source layer 1, the light source layer 1 is provided with a plurality of light emitting units 11;
  • the light guiding layer 2 is disposed on one side of the light source layer 1.
  • the side of the light guiding layer 2 facing away from the light source layer 1 is provided with a plurality of reflective prism units 3, a plurality of reflecting prism units 3 and a plurality of light emitting units 11
  • the position of the reflecting prism unit 3 is for reflecting the light emitted by the light emitting unit 11 into the light guiding layer 2 and causing the light to propagate laterally within the light guiding layer;
  • the dot layer 4 is disposed on one side of the light guiding layer for taking out the light in the light guiding layer as a backlight source.
  • the backlight module is mainly applied to a backlight module of a direct-lit type liquid crystal display.
  • the light source layer 1 serves as a light source of the backlight module, and has a plurality of light-emitting units 11 thereon.
  • the light-emitting unit 11 can be an LED chip, and the LED light source is At present, the most commonly used backlight source in a direct type liquid crystal display has the characteristics of long life, small volume, low energy consumption, and the like, and a plurality of the above-mentioned LED chips can be uniformly disposed as a light source on the light source layer 1.
  • the light guiding layer 2 can be made of a transparent material, and can be made of a transparent dielectric material having a refractive index of 1.5 such as ITO or Si 3 N 4 , and the thickness of the light guiding layer 2 can be between 2 micrometers and 1 mm.
  • the light-reflecting prism unit 3 is disposed on a side of the light-guiding layer 2 facing away from the light source layer 1 , and each of the light-emitting units 11 corresponds to one light-reflecting prism unit 3 , and the light emitted by each of the light-emitting units 11 is transmitted through the guide.
  • the dot layer 4 can be, for example, a grating structure for extracting light from the light guiding layer 2, and the light in the light guiding layer 2 can be diffracted by the grating of the halftone layer.
  • Light layer 2 to achieve illumination of the backlight.
  • Embodiments of the present disclosure provide a backlight module for reducing the number of light emitting units and reducing the thickness of the backlight module.
  • the LED light source of the direct type display device improves the uniformity of the backlight display by preserving the light mixing distance and increasing the density of the LED light source, but this not only increases the thickness of the display device but also increases the cost.
  • the backlight module provided by the present application includes: a light source layer, a light guiding layer and a dot layer, wherein the light source layer is provided with a plurality of light emitting units, and the light guiding layer is disposed on one side of the light source layer.
  • the side of the light guiding layer facing away from the light source layer is provided with a plurality of reflecting prism units, and the plurality of reflecting prism units are in one-to-one correspondence with the positions of the plurality of light emitting units, and the reflecting prism unit is configured to reflect the light emitted by the light emitting unit into the light guiding layer. Therefore, the light is sufficiently mixed by total reflection in the light guiding layer, so that improved backlight uniformity can be obtained by using fewer light emitting units, so that the density of the light emitting unit can be reduced, the cost can be reduced, and the thickness of the light guiding layer can be reduced. It is much smaller than the reserved light mixing distance of the LED light source in the related art, thereby reducing the thickness of the display device.
  • the reflective prism unit 3 can be of various structural styles, as shown in FIG. 2 and FIG. 3 .
  • the reflective prism unit 3 includes: a first prism module 31 , and the first prism module 31 is on the light guiding layer 2 .
  • the first orthographic projection is circular, and the center of the first orthographic projection corresponds to the center of illumination of the light-emitting unit 11, and the thickness of the first prism module 31 is sequentially decreased from the edge to the center of the circle.
  • the reflective prism is The transparent material is formed, wherein the thickness of the first prism module 31 is sequentially decreased from the edge to the center of the circle, so that a groove is formed in the middle of the first prism module 31, and the groove may be a tapered groove or It is a hemispherical groove and is not specifically limited herein.
  • the angle between the upper surface of the first prism module 31 and the light guiding layer 2 is a, and the light is in the first
  • the reflection angle of a prism module 31 is a1.
  • the light reflected by the first prism module 31 is irradiated on the substrate at an incident angle b, and the angle of incidence b can be made not less than the critical angle by rationally designing the angle of a, thereby realizing that the light-emitting unit 11 emits
  • the light rays are repeatedly reflected in the light guiding layer 2 to be sufficiently mixed, and the structure of the first prism module described above is simple, which reduces the production cost.
  • the first prism module 31 may be made of the same transparent material as the light guiding layer 2, or may be made of a different material. In the exemplary embodiment of FIG. 4, the first prism module 31 and the light guiding layer 2 are composed of the same material.
  • the angle of the above-mentioned angle a that is, the inclination angle of the inclined surface of the first prism module 31 with respect to the light guiding layer 2
  • the incident angle of the light on the inclined surface of the first prism module 31 is larger than the critical angle, thereby ensuring incidence.
  • Light rays incident on the slope of the first prism module 31 are reflected back into the light guiding layer 2.
  • the slope of the first prism module 31 may partially or entirely coat a high reflectivity layer, such as a metal film layer or other material layer having high reflectivity, such that the light emitting unit 11 Light rays that are incident on the slope of the first prism module 31 are more reflected.
  • a high reflectivity layer such as a metal film layer or other material layer having high reflectivity
  • the reflecting prism unit 3 further includes: a second prism module 32, the second orthographic projection of each of the second prism modules 32 on the light guiding layer 2 is annular, and the plurality of second prism modules 32 sequentially surround the first prism module 31 and are both first and first The prism modules 31 are arranged concentrically, and the thickness of each of the second prism modules 32 is sequentially decreased from the edge toward the center of the circle.
  • the plurality of second prism modules 32 are surrounded by the first prism module 31, for example, the plurality of second prism modules 32 include a first sub-module and a second sub-module that are orthographically projected into a circular shape, respectively. a third sub-module, wherein the first sub-module surrounds the first prism module 31, the second sub-module surrounds the first sub-module, and the third sub-module surrounds the second sub-module, so that the first prism module 31, the first The sub-module, the second sub-module and the third sub-module are coupled to each other to form the above-mentioned reflective prism unit 3.
  • the radial cross-sectional shape of the second prism module 32 may be a right-angled triangle and a hypotenuse of a right-angled triangle.
  • the reflection principle of each of the second prism modules 32 is the same as that of the first prism module 31, and the material of each of the second prism modules 32 can be combined with the first prism module 31. The same, will not be described here.
  • the coverage area of the retroreflecting prism unit 3 can be increased, so that the light emitted by the light emitting unit 11 is more in the light guiding layer.
  • a surface of the first prism module facing away from the light guiding layer is a first surface, and the first surface forms a first straight line in a radial cross section of the first prism module; and each of the second prism modules faces away from the light guiding
  • the faces of the layers are second faces, each second face forming a second straight line in the radial section of the second prism module.
  • the surface facing away from the light guiding layer in the first prism module is the first surface, and the first surface is the concave surface of the first prism module, and the first surface is in the radial direction of the first prism module.
  • first straight line in the cross section so the first surface is an inverted conical surface, because in the radial section of the first prism module, the first straight line is used to reflect the light, and can pass the first
  • the angle between the straight line and the light guiding layer is designed to achieve total reflection of light, thereby improving the uniformity of the backlight; similarly, the second straight line of the second prism module in the radial section can also be adjusted.
  • the angle between the two straight lines and the light guiding layer is designed to achieve total reflection of light, thereby improving the uniformity of the backlight.
  • the angle between the first straight line and the light guide plate is a first angle
  • the angle between the plurality of second lines and the light guide plate is respectively For a plurality of second angles
  • the angle of the first angle is greater than the angle of any one of the second angles
  • the second angle of the second prism module 32 adjacent to the first prism module 31 is greater than the distance from the first The second angle of angle of the second prism module 32 of the prism module 31.
  • the angle of ⁇ is gradually increased. As shown in FIG. 4 and FIG.
  • the angle ⁇ increases, if the incident angle is too large, the light in the light guiding layer will be emitted from the light guiding layer and cannot propagate in the light guiding layer.
  • the angle of reflection of the light in the light guiding layer can be reduced by reducing the angle of a, so the second angle of the second prism module farther from the center of the circle is smaller, so that the emitted light can pass through the light guiding layer. Full reflection lateral propagation.
  • first prism module 31 and the plurality of second prism modules 32 are integrally formed structures.
  • first prism module 31 and the plurality of second prism modules 32 are integrally formed, no gap is generated between the adjacent two prism modules, so that the preset angle range of the light emitting unit 11 is The light rays can all be reflected into the light guiding layer 2 through the reflective prism unit 3 to avoid the occurrence of light leakage.
  • the reflective prism unit 3 of the integrally formed structure is more convenient to process and assemble.
  • the backlight module may have other functional layers, as shown in FIG. 1 , specifically, a diffusion layer 5 and a prism film 6 , wherein the diffusion layer 5 is disposed on The dot layer 4 is away from the side of the light guiding layer 2, and the prism film 6 is disposed on the side of the diffusion layer 5 away from the halftone layer 4.
  • the diffusion layer 5 may be composed of a high transmittance polymer (for example, polycarbonate or the like) and scattering particles (such as titanium dioxide or the like) doped therein, or may be a laminated structure of a multilayer film.
  • the diffusion layer 5 is used for scattering the light incident into the diffusion layer 5 to achieve a uniform distribution of the backlight intensity;
  • the prism film 6 can be formed by a prism layer having a sharp-angled microprism structure and a substrate layer. Its main function is to further diffuse the light to ensure the uniformity of the backlight light intensity.
  • the backlight module may further include a reflective layer 7.
  • the reflective layer 7 may be disposed on a side of the light guiding layer 2 that faces away from the halftone layer 4. By the arrangement of the reflective layer 7, the light illuminating the reflective layer 7 can be reflected upward so that the light can re-enter the light guiding layer 2.
  • the reflective layer 7 may be a metal film layer or a multilayer dielectric film, which is not specifically limited herein.
  • the light source layer 1 is disposed at least between the light guide layer 2 and the halftone layer 4, as shown in FIG.
  • the reflective prism unit is disposed between the reflective layer 7 and the light guiding layer 2.
  • the backlight module structure may be a backlight module structure in the form of an LED bottom emission. As shown in FIG. 1 , optionally, the light source layer 1 is disposed between the reflective layer 7 and the light guiding layer 2, and the plurality of reflective prism units are disposed on Between the light guiding layer 2 and the halftone layer 4.
  • the backlight module structure may be a backlight module structure in the form of an LED top emission. Therefore, the backlight module may have various structural styles according to the form of the display device, which is not limited herein.
  • the backlight module of the above embodiment of the present disclosure the number of light emitting units can be reduced and the thickness of the backlight module can be reduced.
  • the LED light source of the direct type display device in the related art improves the uniformity of the backlight display by preserving the light mixing distance and increasing the density of the LED light source, but this not only increases the thickness of the display device but also increases the cost.
  • the backlight module provided by the present application includes: a light source layer, a light guiding layer and a dot layer, wherein the light source layer is provided with a plurality of light emitting units, and the light guiding layer is disposed on one side of the light source layer.
  • the side of the light guiding layer facing away from the light source layer is provided with a plurality of reflecting prism units, and the plurality of reflecting prism units are in one-to-one correspondence with the positions of the plurality of light emitting units, and the reflecting prism unit is configured to reflect the light emitted by the light emitting unit into the light guiding layer.
  • the dot layer layer can take out the light in the light guiding layer as a backlight source.
  • the light guiding layer is a backlight and the non-light emitting unit is used as a backlight, the density of the light emitting unit can be reduced, the cost can be reduced, and the light guide is The thickness of the layer is much smaller than the reserved light mixing distance of the LED light source in the related art, thereby reducing the thickness of the display device.
  • an embodiment of the present disclosure further provides a display device including the above backlight module.
  • the embodiment of the present disclosure provides a display device for reducing the number of light emitting units and the thickness of the backlight module.
  • the LED light source of the direct type display device is improved by preserving the light mixing distance and increasing the density of the LED light source.
  • the uniformity of the backlight display but this not only increases the thickness of the display device, but also increases the cost.
  • the display device provided by the present application includes: a light source layer and a light guiding layer, wherein the light source layer is provided with a plurality of light emitting units, the light guiding layer is disposed on one side of the light source layer, and the light guiding layer faces away from One side of the light source layer is provided with a plurality of reflective prism units, and the plurality of reflective prism units are in one-to-one correspondence with the positions of the plurality of light-emitting units, and the reflective prism unit is configured to reflect the light emitted by the light-emitting unit into the light guiding layer, and the dot layer
  • the light in the light guiding layer can be taken out as a backlight source.
  • the light guiding layer is a backlight and the non-light emitting unit is used as a backlight, the density of the light emitting unit can be reduced, the cost can be reduced, and the thickness of the light guiding layer can be reduced. It is smaller than the reserved light mixing distance of the LED light source in the related art, and thus the thickness of the display device can be reduced.

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Abstract

一种背光模组和显示设备。背光模组包括：光源层（1），光源层（1）上设有多个发光单元（11）；导光层（2），导光层（2）背离光源层（1）的一侧设有多个反光棱镜单元（3），多个反光棱镜单元（3）与多个发光单元（11）的位置一一对应，反光棱镜单元（3）构造成将发光单元（11）发出的光线反射至导光层（2）内并使反射的光线在导光层（2）内发生全反射；和网点层（4），其中设置有用于从导光层（2）提取光的光学结构。

Description

背光模组和显示设备
相关申请的交叉引用
本申请主张在2018年3月30日在中国提交的中国专利申请号No.201810297117.9的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及显示技术领域，尤其涉及一种背光模组和显示设备。
背景技术
随着显示技术的快速发展，液晶显示设备已经成为了当今最普及的显示设备之一，在液晶显示设备中被背光光源一般为LED光源，LED光源为点型光源，在液晶显示面板上均匀分布有多个LED光源，由于LED光源的光线能量比较集中，这样在背光显示中，就会出现明暗交替不均的现象，影响显示效果。
为了提高显示设备的显示效果，相关技术中直下式显示设备的LED光源通过预留混光距离以及增加LED光源密度来提高背光显示的均匀性，但是这样不仅会增加显示设备的厚度，还会增加成本。
发明内容
一方面，本公开实施例提供了一种背光模组，包括：
光源层，所述光源层上设有多个发光单元；
导光层，所述导光层背离所述光源层的一侧设有多个反光棱镜单元，多个所述反光棱镜单元与多个所述发光单元的位置一一对应，所述反光棱镜单元构造成将所述发光单元发出的光线反射至所述导光层内并使反射的光线在所述导光层内发生全反射；
网点层，其中设置有用于从所述导光层提取光的光学结构。
进一步的，所述反光棱镜单元包括：第一棱镜模块，所述第一棱镜模块在所述导光层上的正投影为圆形，所述圆形正投影的圆心与所述发光单元的 发光中心相对应，所述第一棱镜模块的厚度从边沿向圆心的方向上依次减小。
进一步的，所述反光棱镜单元还包括：至少一个第二棱镜模块，每个所述第二棱镜模块在所述导光层上的第二正投影为圆环形，多个所述第二棱镜模块在所述导光层上的正投影依次环绕于所述第一棱镜模块在所述导光层上的正投影且均与所述第一棱镜模块在所述导光层上的正投影同心设置，每个所述第二棱镜模块的厚度从边沿向圆心的方向上依次减小。
进一步的，所述第一棱镜模块中背离于所述导光层的面为第一面，所述第一面在所述第一棱镜模块的径向截面中形成第一直线；
每个所述第二棱镜模块中背离于所述导光层的面为第二面，每个所述第二面在所述第二棱镜模块的径向截面中形成第二直线。
进一步的，所述第一直线与所述导光板之间的夹角为第一夹角，多个所述第二直线与所述导光板之间的夹角分别为多个第二夹角，所述第一夹角的角度大于任意一个所述第二夹角的角度，其中，靠近于所述第一棱镜模块的所述第二棱镜模块的第二夹角角度大于远离于所述第一棱镜模块的所述第二棱镜模块的第二夹角角度。
进一步的，所述第一棱镜模块和多个所述第二棱镜模块为一体成型结构。
进一步的，该背光模组包括设置于所述网点层远离所述导光层的一侧上的扩散层。
进一步的，该背光模组包括设置于所述扩散层远离所述网点层的一侧上的棱镜膜。
进一步的，所述网点层与所述光源层分别设置在所述导光层的相对的两侧表面上。
进一步的，所述网点层与所述光源层设置在所述导光层的同一侧。
进一步的，所述的背光模组，还包括：
扩散层和棱镜膜，所述扩散层设置于所述网点层远离所述导光层的一侧，所述棱镜膜设置于所述扩散层远离所述网点层的一侧。
进一步的，所述的背光模组，还包括
反射层，所述反射层设置于导光层背离于所述网点层的一侧。
进一步的，所述光源层设置于所述导光层和所述网点层之间，多个所述 反射棱镜单元设置于所述反射层与所述导光层之间。
进一步的，所述光源层设置于所述反射层与所述导光层之间，多个所述反射棱镜单元设置于所述导光层和所述网点层之间。
另一方面，本公开实施例还提供了一种显示设备，其包括上述背光模组。
附图说明
图1为本公开一种实施例提供的背光模组的结构示意图；
图2为本公开实施例提供的反光棱镜单元的截面示意图；
图3为本公开实施例提供的反光棱镜单元的俯视图；
图4为本公开实施例提供的背光模组的原理示意图；
图5为本公开实施例提供的背光模组中光线传播示意图；
图6为本公开另一种实施例提供的背光模组的结构示意图。
具体实施方式
为更进一步阐述本公开为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例，对依据本公开提出的背光模组其具体实施方式、结构、特征及其功效，详细说明如后。
如图1所示，本公开实施例提供了一种背光模组，包括：
光源层1，光源层1上设有多个发光单元11；
导光层2，导光层2设置于光源层1的一侧，导光层2背离光源层1的一侧设有多个反光棱镜单元3，多个反光棱镜单元3与多个发光单元11的位置一一对应，反光棱镜单元3用于将发光单元11发出的光线反射至导光层2内，并使光线在所述导光层内横向传播；
网点层4，网点层4设置于导光层的一侧，用于将导光层内的光线取出以作为背光光源。
其中，上述的背光模组主要应用于直下式液晶显示器的背光模组，光源层1作为背光模组的光源，其上具有多个发光单元11，该发光单元11可以为LED芯片，LED光源是目前直下式液晶显示器中最常用的背光光源，其具有寿命长、体积小、能耗低等特点，在光源层1上可以均匀设有多个上述的LED 芯片作为光源。
其中，导光层2可以由透明材质制成，其可以选用ITO或者Si 3N 4等折射率为1.5的透明介质材料制成，而导光层2的厚度可以为2微米至1mm之间，在此不作具体限定，在导光层2背离光源层1的一侧设有多个反光棱镜单元3，每个发光单元11对应一个反光棱镜单元3，每个发光单元11发出的光线透过导光层2后大部分可以照射在其对应的反光棱镜单元3上，在反光棱镜的作用下，可以将照射在反光棱镜单元3上的光线以全反射的形式在导光层2内横向传播，然后在导光层2上方设计合适的网点层结构，网点层4可以为例如光栅结构，用于从导光层2提取光，导光层2内的光线可以通过网点层的光栅的衍射出导光层2，以实现背光的发光。
本公开实施例提供了一种背光模组，用于减少发光单元的数量以及降低背光模组的厚度。相关技术中，直下式显示设备的LED光源通过预留混光距离以及增加LED光源密度来提高背光显示的均匀性，但是这样不仅会增加显示设备的厚度，还会增加成本。与相关技术相比，本申请文件提供的背光模组，包括：光源层、导光层和网点层，其中，光源层上设有多个发光单元，导光层设置于光源层的一侧，导光层背离光源层的一侧设有多个反光棱镜单元，多个反光棱镜单元与多个发光单元的位置一一对应，反光棱镜单元用于将发光单元发出的光线反射至导光层内，使得光线在导光层内通过全反射进行充分混合，从而能够使用较少的发光单元而获得改善的背光均匀性，所以可以减小发光单元的密度，降低成本，又由于导光层的厚度远小于相关技术中LED光源的预留混光距离，进而可以减小显示设备的厚度。
上述的反光棱镜单元3可以为多种结构样式，如图2、图3所示，可选地，反光棱镜单元3包括：第一棱镜模块31，第一棱镜模块31在导光层2上的第一正投影为圆形，第一正投影的圆心与发光单元11的发光中心相对应，第一棱镜模块31的厚度从边沿向圆心的方向上依次减小，本实施例中，反光棱镜为透明材质制成，其中，第一棱镜模块31的厚度从边沿向圆心的方向上依次减小，这样就在第一棱镜模块31的中部形成凹槽，该凹槽可以为锥形槽，也可以为半球形槽，在此不作具体限定。
如图4所示，由发光单元11发出的光线经过导光层2进入至反光棱镜单 元3时，第一棱镜模块31的上表面与导光层2之间的夹角为a，光线在第一棱镜模块31的反射角为a1，通过合理设计夹角a的角度，可以使入射光线在第一棱镜模块31的斜面以适当的角度反射回到导光层2，并且继而可以使光线以全反射形式在导光层2内横向传播。在图4所示的示例中，经第一棱镜模块31反射的光线以入射角b照射在基底上，通过合理设计a的角度可以使得该入射角b不小于临界角，从而实现发光单元11发出的光线在导光层2内重复发生全反射、从而得到充分混合的目的，而且上述的第一棱镜模块的结构简单，降低了生产成本。
第一棱镜模块31可以采用与导光层2相同的透明材质制成，或者采用不同的材料制成。在图4的示例实施例中，第一棱镜模块31与导光层2由相同的材料构成。通过合理设置上述夹角a的角度，也即第一棱镜模块31的斜面相对导光层2的倾斜角度，使得光线在第一棱镜模块31的斜面上的入射角大于临界角，即可确保入射到第一棱镜模块31的斜面上的光线被反射，回到导光层2中。
此外，根据本公开的另外一些实施例，第一棱镜模块31的斜面可以部分地或者全部涂覆高反射率层，例如金属膜层或其他具有高反射率的材料层，以使得从发光单元11照射到第一棱镜模块31的斜面上的光线被更多地反射。
由于发光单元11的发光角度为发散状，为了进一步发射更多的光线进入至导光层2内，如图2、图3、图5所示，可选地，反光棱镜单元3还包括：至少一个第二棱镜模块32，每个第二棱镜模块32在导光层2上的第二正投影为圆环形，多个第二棱镜模块32依次环绕于第一棱镜模块31且均与第一棱镜模块31同心设置，每个第二棱镜模块32的厚度从边沿向圆心的方向上依次减小。本实施例中，多个第二棱镜模块32一侧环绕于第一棱镜模块31，例如：多个第二棱镜模块32包括分别正投影为圆环形的第一子模块、第二子模块和第三子模块，其中，第一子模块环绕于第一棱镜模块31，第二子模块环绕于第一子模块，第三子模块环绕于第二子模块，使第一棱镜模块31、第一子模块、第二子模块和第三子模块之间彼此相互衔接，以组成上述的反光棱镜单元3，上述的第二棱镜模块32的径向截面形状可以为直角三角形，而直角三角形的斜边为第二棱镜模块32的上表面，每个第二棱镜模块32的反 射原理与第一棱镜模块31的反射原理相同，并且每个第二棱镜模块32的制成材料可以与第一棱镜模块31相同，在此不作赘述。通过多个第二棱镜模块32的设置，可以增加反光棱镜单元3的覆盖面积，使得发光单元11发射的光线更多地在导光层内。
进一步的，第一棱镜模块中背离于导光层的面为第一面，第一面在第一棱镜模块的径向截面中形成第一直线；每个第二棱镜模块中背离于导光层的面为第二面，每个第二面在第二棱镜模块的径向截面中形成第二直线。本实施例中，在第一棱镜模块中背离于导光层的面为第一面，而第一面为第一棱镜模块的凹陷面，又由于该第一面在第一棱镜模块的径向截面中为直线状的第一直线，所以该第一面为倒锥形曲面，由于在第一棱镜模块的径向截面中，第一直线用于对光线进行反射，并且可以通过第一直线与导光层之间的夹角设计来实现光线的全反射，进而提高了背光的均匀性；同理，上述第二棱镜模块在径向截面中的第二直线，同样可以通过调节第二直线与导光层之间的角度设计来实现光线的全反射，进而提高了背光的均匀性。
为了使照射到发光棱镜单元的光线全部实现全反射，可选地，第一直线与导光板之间的夹角为第一夹角，多个第二直线与导光板之间的夹角分别为多个第二夹角，第一夹角的角度大于任意一个第二夹角的角度，其中，靠近于第一棱镜模块31的第二棱镜模块32的第二夹角角度大于远离于第一棱镜模块31的第二棱镜模块32的第二夹角角度。本实施例中，由于多个第二棱镜模块32依次远离于第一棱镜模块31的圆心，使θ的角度逐步变大，如图4、图5所示，随着θ角的增加将会导致导光层内光线的输入角度的增加，如果入射角度过大，将会使导光层内的光线射出导光层，无法在导光层内传播，为了保证光线能够在导光层内传播，可以通过减小a的角度来减小光线在导光层内的反射角角度，所以距离圆心越远的第二棱镜模块的第二夹角越小，以使发射光线能够在导光层内通过全反射横向传播。
进一步的，第一棱镜模块31和多个第二棱镜模块32为一体成型结构。本实施例中，由于第一棱镜模块31和多个第二棱镜模块32为一体成型结构，这样相邻两个棱镜模块之间就不会产生间隙，使发光单元11发出的预设角度范围内的光线可以全部通过反光棱镜单元3反射至导光层2内，避免漏光现 象的发生，另外，一体成型结构的反光棱镜单元3加工和装配都更加的方便。
上述背光模组除了具有导光层2和光源层1外，还可以具有其他的功能层，如图1所示，具体的，还包括扩散层5和棱镜膜6，其中，扩散层5设置于网点层4远离导光层2的一侧，棱镜膜6设置于扩散层5远离网点层4的一侧。本实施例中，扩散层5可以为高透光率的聚合物(例如：聚碳酸醋等)和掺杂在其中的散射颗粒(如二氧化钛等)组成，也可以为多层膜的层叠结构，扩散层5用于将射入至扩散层5内的光线进行散射，以实现背光光强的均匀分布；棱镜膜6可以由一个具有尖角微棱镜结构的棱镜层和一个基板层贴合而成，其主要作用为将光线进一步的扩散，以保证背光光强的均匀性。
进一步的，上述背光模组还可以包括反射层7。根据本公开的一些实施例，反射层7可以设置于导光层2背离于网点层4的一侧。通过反射层7的设置，可以将照射到反射层7的光线向上反射，使得光线可以重新进入导光层2中。上述的反射层7可以为金属膜层，也可以为多层介质膜，在此不作具体限定。
上述光源层1相对于反射层7和网点层4的设置位置至少可以有两种，如图6所示，可选地，光源层1设置于导光层2和网点层4之间，多个反射棱镜单元设置于反射层7与导光层2之间。该背光模组结构可以为LED底发射形式的背光模组结构，如图1所示，可选地，光源层1设置于反射层7与导光层2之间，多个反射棱镜单元设置于导光层2和网点层4之间。该背光模组结构可以为LED顶发射形式的背光模组结构，所以根据显示设备的形式不同，上述的背光模组可以为多种结构样式，在此不作一一限定。
根据本公开上述实施例的背光模组，能够减少发光单元的数量以及降低背光模组的厚度。相关技术中的直下式显示设备的LED光源通过预留混光距离以及增加LED光源密度来提高背光显示的均匀性，但是这样不仅会增加显示设备的厚度，还会增加成本。与相关技术相比，本申请文件提供的背光模组，包括：光源层、导光层和网点层，其中，光源层上设有多个发光单元，导光层设置于光源层的一侧，导光层背离光源层的一侧设有多个反光棱镜单元，多个反光棱镜单元与多个发光单元的位置一一对应，反光棱镜单元用于 将发光单元发出的光线反射至导光层内，而网点层能够将导光层内的光线取出以作为背光光源，由于导光层为背光源，而非发光单元作为背光源，所以可以减小发光单元的密度，降低成本，又由于导光层的厚度远小于相关技术中LED光源的预留混光距离，进而可以减小显示设备的厚度。
另一方面，本公开实施例还提供了一种显示设备，其包括上述背光模组。
本公开实施例提供了一种显示设备，用于减少发光单元的数量以及背光模组的厚度，而相关技术中，直下式显示设备的LED光源通过预留混光距离以及增加LED光源密度来提高背光显示的均匀性，但是这样不仅会增加显示设备的厚度，还会增加成本。与相关技术相比，本申请文件提供的显示设备，包括：光源层和导光层，其中，光源层上设有多个发光单元，导光层设置于光源层的一侧，导光层背离光源层的一侧设有多个反光棱镜单元，多个反光棱镜单元与多个发光单元的位置一一对应，反光棱镜单元用于将发光单元发出的光线反射至导光层内，而网点层能够将导光层内的光线取出以作为背光光源，由于导光层为背光源，而非发光单元作为背光源，所以可以减小发光单元的密度，降低成本，又由于导光层的厚度元小于相关技术中LED光源的预留混光距离，进而可以减小显示设备的厚度。
以上所述，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，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (13)

  1. 一种背光模组，包括：
    光源层，所述光源层上设有多个发光单元；
    导光层，所述导光层背离所述光源层的一侧设有多个反光棱镜单元，多个所述反光棱镜单元与多个所述发光单元的位置一一对应，所述反光棱镜单元构造成将所述发光单元发出的光线反射至所述导光层内并使反射的光线在所述导光层内发生全反射；以及
    网点层，其中设置有用于从所述导光层提取光的光学结构。
  2. 根据权利要求1所述的背光模组，其中，
    所述反光棱镜单元包括：第一棱镜模块，所述第一棱镜模块在所述导光层上的正投影为圆形，所述圆形正投影的圆心与所述发光单元的发光中心相对应，所述第一棱镜模块的厚度从边沿向圆心的方向上依次减小。
  3. 根据权利要求2所述的背光模组，其中，
    所述反光棱镜单元还包括：至少一个第二棱镜模块，每个所述第二棱镜模块在所述导光层上的正投影为圆环形，多个所述第二棱镜模块在所述导光层上的正投影依次环绕于所述第一棱镜模块在所述导光层上的正投影且均与所述第一棱镜模块在所述导光层上的正投影同心设置，每个所述第二棱镜模块的厚度从边沿向圆心的方向上依次减小。
  4. 根据权利要求3所述的背光模组，其中，
    所述第一棱镜模块中背离于所述导光层的面为第一面，所述第一面在所述第一棱镜模块的径向截面中形成第一直线，每个所述第二棱镜模块中背离于所述导光层的面为第二面，每个所述第二面在所述第二棱镜模块的径向截面中形成第二直线；
    所述第一直线与所述导光板之间的夹角为第一夹角，多个所述第二直线与所述导光板之间的夹角分别为多个第二夹角，所述第一夹角的角度大于任意一个所述第二夹角的角度，其中，靠近于所述第一棱镜模块的所述第二棱镜模块的第二夹角角度大于远离于所述第一棱镜模块的所述第二棱镜模块的第二夹角角度。
  5. 根据权利要求4所述的背光模组，其中，
    所述第一棱镜模块和多个所述第二棱镜模块为一体成型结构。
  6. 根据权利要求1所述的背光模组，还包括设置于所述网点层远离所述导光层的一侧上的扩散层。
  7. 根据权利要求6所述的背光模组，还包括设置于所述扩散层远离所述网点层的一侧上的棱镜膜。
  8. 根据权利要求1所述的背光模组，其中所述网点层与所述光源层分别设置在所述导光层的相对的两侧表面上。
  9. 根据权利要求1所述的背光模组，其中所述网点层与所述光源层设置在所述导光层的同一侧。
  10. 根据权利要求1所述的背光模组，还包括
    反射层，所述反射层设置于导光层背离于所述网点层的一侧。
  11. 根据权利要求10所述的背光模组，其中，
    所述光源层设置于所述导光层和所述网点层之间，多个所述反射棱镜单元设置于所述反射层与所述导光层之间。
  12. 根据权利要求10所述的背光模组，其中，
    所述光源层设置于所述反射层与所述导光层之间，多个所述反射棱镜单元设置于所述导光层和所述网点层之间。
  13. 一种显示设备，包括：
    如权利要求1至12中任一项所述的背光模组。
PCT/CN2019/079664 2018-03-30 2019-03-26 背光模组和显示设备 WO2019184906A1 (zh)

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