WO2018196448A1 - 导光组件及其制备方法、背光模组和显示装置 - Google Patents

导光组件及其制备方法、背光模组和显示装置 Download PDF

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Publication number
WO2018196448A1
WO2018196448A1 PCT/CN2018/073573 CN2018073573W WO2018196448A1 WO 2018196448 A1 WO2018196448 A1 WO 2018196448A1 CN 2018073573 W CN2018073573 W CN 2018073573W WO 2018196448 A1 WO2018196448 A1 WO 2018196448A1
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WIPO (PCT)
Prior art keywords
light
reflective layer
present disclosure
light guide
guide plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/073573
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English (en)
French (fr)
Inventor
郝瑞军
唐乌力吉白尔
连龙
赵忠平
冯艳玲
毕海峰
范欣桐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Ordos Yuansheng Optoelectronics Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US16/081,703 priority Critical patent/US10578919B2/en
Publication of WO2018196448A1 publication Critical patent/WO2018196448A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02B6/0025—Diffusing sheet or layer; Prismatic 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
    • G02B6/0013—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
    • G02B6/005—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
    • G02B6/0055—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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • 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
    • 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
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a light guiding component, a method of fabricating the same, a backlight module, and a display device.
  • the development of display screens tends to be narrow borders, ultra-thin, and high brightness, and the conventional backlights have been unable to meet the increasing grade requirements.
  • the traditional backlight is a mode of LED+multi-layer film+light guide component+rubber frame+shading tape, when it corresponds to the above high-grade specifications, it will cause various defects such as bright lines, light leakage, wrinkles, and opening of glue, which greatly reduces the number of defects. Finished product yield and increased cost.
  • the ultra-thin, narrow bezel requires extremely high cutting and assembly of the film, the existing process level cannot be satisfied, and the uniformity of the light output is gradually increased. Therefore, the current backlight still needs to be improved.
  • the present disclosure provides a light directing assembly.
  • the light guiding assembly includes: a light guiding plate having a light emitting surface and a back surface opposite to each other, and a side surface contacting the light emitting surface and the back surface; and a first reflective layer, the first a reflective layer is disposed on the light emitting surface, and has a plurality of light transmissive holes; a diffusion layer disposed on a side of the first reflective layer away from the light guide plate, the diffusion layer includes a plate body and is disposed on a plurality of protrusions on the surface of the plate body, the plurality of protrusions are in one-to-one correspondence with the plurality of the light transmission holes, and the light transmission holes receive corresponding protrusions.
  • the light guiding assembly further includes a second reflective layer disposed on a portion of the side surface and the back surface.
  • the first reflective layer, the diffusion layer, and the second reflective layer are each formed by a coating, printing, spraying, or plating process.
  • the diffusion layer is integrated.
  • the back surface has a plurality of microstructures.
  • a portion of the side surface is used as a light incident surface; along a direction away from the light incident surface, a sum of areas of the light transmission holes per unit area on the first reflective layer is gradually reduced small.
  • an area of the light-transmitting hole is constant; a part of the side surface serves as a light-incident surface; and a direction away from the light-incident surface, between two adjacent light-transmitting holes The spacing is gradually reduced.
  • a spacing between adjacent two light-transmitting holes is constant; a portion of the side faces serves as a light-incident surface; and an area of the light-transmitting holes along a direction away from the light-incident surface Gradually increase.
  • the light guide plate further includes a light incident surface; and the light incident surface is provided with a light source receiving groove.
  • the present disclosure provides a backlight module.
  • the backlight module includes: the light guide assembly described in the above embodiment; and a light source disposed on a light incident surface of the light guide plate.
  • the light source is an LED light source.
  • the LED light source includes: an LED flexible circuit board; and an LED light bar, the LED light bar is disposed on a surface of the LED flexible circuit board, wherein the light incident surface is disposed
  • the light source receiving groove is disposed in the light source receiving groove.
  • a light emitting surface of the LED light bar is parallel to a surface of the LED flexible wiring board.
  • the present disclosure provides a display device.
  • the display device includes the backlight module described in the above embodiments.
  • the display device has all the features and advantages of the light guiding component and the backlight module described above, and will not be further described herein.
  • the present disclosure provides a method of making a light directing component.
  • the method includes: providing a light guide plate having a light exit surface and a back surface opposite to each other, and a side surface contacting the light exit surface and the back surface; a portion of the side surface serving as a light incident Forming a first reflective layer on the light-emitting surface, the first reflective layer having a plurality of light-transmissive holes; and forming a diffusion layer on a side of the first reflective layer away from the light guide plate, the diffusion
  • the layer includes a plate-like body and a plurality of protrusions disposed on a surface of the plate-like body, the plurality of protrusions are in one-to-one correspondence with the plurality of the light-transmissive holes, and the light-transmissive holes receive corresponding protrusions.
  • the first reflective layer and the diffusion layer are each formed by a coating, printing, spraying, or coating process.
  • the method further includes forming a second reflective layer on a portion of the side surface and the back surface, the second reflective layer being formed by a coating, printing, spraying, or coating process.
  • At least a portion of the side surface is subjected to a sanding treatment before the second reflective layer is formed.
  • the light-emitting surface is subjected to a cutting process or a surface-finishing process before the first reflective layer is formed.
  • forming the first reflective layer on the light-emitting surface further includes: forming a mask on the light-emitting surface, the pattern of the mask corresponding to the pattern of the light-transmitting holes; Forming the first reflective layer by a coating, printing, spraying or coating process; and removing the mask.
  • FIG. 1 shows an exploded view of a light directing assembly in accordance with an embodiment of the present disclosure.
  • FIG. 2 shows a cross-sectional structural view of a light guiding assembly in accordance with an embodiment of the present disclosure.
  • FIG. 3 shows a schematic structural view of a light guide plate according to an embodiment of the present disclosure.
  • FIG. 4 shows a schematic plan view of a first reflective layer in accordance with an embodiment of the present disclosure.
  • FIG. 5 shows an exploded view of a backlight module in accordance with an embodiment of the present disclosure.
  • FIG. 6 shows a cross-sectional structural view of a backlight module according to an embodiment of the present disclosure.
  • FIG. 7A shows a schematic structural view of an LED light source according to an embodiment of the present disclosure.
  • Fig. 7B shows a schematic structural view of a conventional LED light source.
  • FIG. 8 shows a schematic plan view of a fourth side 217 of a light guide plate according to an embodiment of the present disclosure.
  • FIG. 9 is a flow chart showing a method of preparing a light guiding component according to an embodiment of the present disclosure.
  • FIG. 10 is a flow chart showing a method of preparing a light guiding component according to another embodiment of the present disclosure.
  • FIG. 11 shows a schematic diagram of forming a first reflective layer in accordance with an embodiment of the present disclosure.
  • FIG. 12 shows a schematic cross-sectional view of a light guide plate according to an embodiment of the present disclosure.
  • Embodiments of the present disclosure are described in detail below.
  • the embodiments described below are illustrative only and are not to be construed as limiting the disclosure. Where specific techniques or conditions are not indicated in the examples, they are carried out according to the techniques or conditions described in the literature in the art or in accordance with the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are conventional products that can be obtained commercially.
  • the traditional backlight of LED+multi-layer film + light guide component + plastic frame + light-shielding tape is applied to narrow frame, ultra-thin, high-brightness display screen, and there are various defects such as bright line, light leakage, wrinkle, and open glue.
  • the assembly, processing, and the like of the multilayer optical film cause problems such as assembly misalignment, scratches, and foreign matter.
  • the present disclosure provides a light directing assembly.
  • the light guiding assembly includes: a light guide plate 21 having light emitting surfaces 212 and a back surface 216 opposite to each other, and the light emitting surface 212 and the back surface 216
  • the first reflective layer 22 is disposed on the light-emitting surface 212 and has a plurality of light-transmissive holes 221 .
  • the diffusion layer 24 is disposed on a side of the first reflective layer 22 away from the light guide plate 21, and the diffusion layer 24 includes a plate body 241 and a plurality of protrusions 242 disposed on a surface of the plate body 241, The plurality of protrusions 242 are in one-to-one correspondence with the plurality of the light-transmissive holes 221, and the light-transmissive holes 221 receive the corresponding protrusions 242.
  • the side surface 210 of the light guide plate includes four portions, that is, a first side surface 213, a second side surface 214, a third side surface 215, and a fourth side surface 217.
  • a part of the side can be used, for example, as a light-incident surface.
  • the reflective layer and the diffusion layer in the light guiding component can be formed by coating, coating, etc., which reduces the cumbersome processing and assembly process of the film in the prior art, and avoids poor processing and assembly process of the film, such as dimensional instability. Foreign objects, scratches, assembly offsets, etc., greatly reduce production costs, while also improving production efficiency and yield. Moreover, it can also meet the requirements of the narrow frame and ultra-thinness of the current reality module.
  • the brightness uniformity of the light guiding component can be achieved by adjusting the arrangement of the light-transmissive holes of the first reflective layer, thereby avoiding modifying the light guide plate mold, reducing the mold repair cost and improving the cycle, and improving the light guide plate mold and the mold.
  • the versatility of the processed light guide plate can extend the service life.
  • a portion of the diffusion layer ie, the plurality of protrusions
  • the light-transmissive hole of the reflective layer by coating, plating, or the like, so that the light emitted from the light-emitting surface of the light guide plate can be more uniform.
  • Improve optical effects can be achieved.
  • the light guiding assembly may further include a second reflective layer 23 disposed on a portion of the side surface 210 and the back surface 216.
  • a second reflective layer 23 disposed on a portion of the side surface 210 and the back surface 216.
  • part of the diffusion layer is filled in the light-transmitting hole should be understood in a broad sense, and may be a part of the diffusion hole filled in the diffusion layer, or may be a diffusion layer filling the light-transmission hole. All.
  • the specific material for forming the light guide plate is not particularly limited, and materials of conventional light guide plates in the art may be employed, such as, but not limited to, polymethyl methacrylate, polycarbonate, etc., thereby having better Light transmission and mechanical properties.
  • the diffusion layer 24 is integral.
  • the diffusion layer is unitary means that the plate-like body 241 and the plurality of protrusions 242 are integrally formed.
  • the back surface of the light guide plate may be provided with a plurality of microstructures.
  • the reflected light will diffuse at various angles, and then the reflection conditions will be emitted from the front side of the light guide plate.
  • the light guide plate can be uniformly illuminated by providing various fine structures of different sizes and sizes.
  • the size, the shape, the distribution manner, and the like of the microstructure are not particularly limited, and may be selected according to actual needs, and specifically, it is preferable to improve the uniformity of light emission of the light guide plate.
  • At least a part of the surface of the side surface of the light guide plate may be subjected to a sanding treatment in advance.
  • the surface roughness can be effectively increased, so that when the light is incident on the side surface, the reflected light spreads to the periphery, thereby avoiding the generation of the edge bright line.
  • the first side 213, the second side 214, and the third side 215 may be sanded in advance, thereby avoiding edge bright lines.
  • the light exit surface of the light guide plate may be subjected to a cutting process or a surface finish treatment in advance. Thereby, the light uniformity can be further improved.
  • FIG. 12 is a schematic view of a specific structure.
  • the light-incident surface (ie, the fourth side surface 217) of the light guide plate may further be provided with the light source receiving groove 211. Therefore, the light source can be disposed in the light source receiving groove 211. This design can ensure that the light emitted from the light source enters the light guide plate more, thereby improving the light utilization rate and achieving high brightness.
  • the first reflective layer, the diffusion layer, and the second reflective layer are each formed by a coating, printing, spraying, or plating process.
  • the process is mature, the steps are simple, the operation is convenient, the mass production is easy to be realized, and the complicated operation steps such as processing and assembly of the multilayer film in the prior art are overcome, and manpower and material resources are saved, and the economy is good.
  • the first reflective layer, the diffusion layer and the second reflective layer are used in the light guiding component, so as to avoid unqualified film cutting, edge burrs, scratches, and poor assembly processes, such as offset, foreign matter, dirt, etc.
  • the problem is that the light guiding component can be applied to a high-definition display panel with a narrow bezel, ultra-thin, high brightness, etc., to meet higher usage requirements.
  • the material forming the first reflective layer and the second reflective layer is not particularly limited as long as the reflection performance requirement is satisfied.
  • the materials forming the first reflective layer and the second reflective layer include, but are not limited to, metals such as silver, aluminum, and the like. Thereby, it has a high reflectance and a high light utilization efficiency.
  • the material forming the diffusion layer is also not particularly limited as long as it has an effect of diffusing light.
  • the diffusion layer may be formed of a matrix material and diffusion particles dispersed in the matrix material, the matrix material may be a polymer, and the diffusion particles may be inorganic oxide particles or the like as long as they have a suitable refractive index. Therefore, the formed diffusion layer has a desired diffusion effect, and the specific material can be flexibly selected by a person skilled in the art as needed.
  • the first reflective layer is provided with a light-transmitting hole, which not only ensures that the light is effectively transmitted through the first reflective layer, but also controls the light-emitting uniformity of the light guide plate by adjusting the distribution of the light-transmitting holes.
  • the shape and specific distribution manner of the light-transmitting holes are not particularly limited, and those skilled in the art can flexibly select according to the needs as long as the use requirements are satisfied.
  • the shape of the light transmission holes may include, but is not limited to, a circle, a rectangle, a square, and other regular or irregular shapes.
  • a portion of the side surface serves as a light incident surface; a sum of areas of the light transmission holes per unit area on the first reflective layer along a direction away from the light incident surface slowing shrieking.
  • the area of the light-transmitting hole is constant; a part of the side surface is used as a light-incident surface; and two adjacent places are located away from the light-incident surface.
  • the spacing between the light-transmitting holes is gradually reduced.
  • the spacing between adjacent two light-transmissive holes is constant; a portion of the side faces serves as a light-incident surface; along a direction away from the light-incident surface, The area of the light transmission hole gradually increases.
  • the plurality of light transmission holes are distributed in a direction away from the light incident surface in at least one of the following: the light transmission hole diameter of Certainly, the pitch Pn between two adjacent light-transmitting holes is gradually decreased; the pitch Pn between two adjacent light-transmitting holes is constant, and the diameter of the light-transmitting holes is constant Gradually increase. Thereby, the light uniformity of the light guiding component can be made higher.
  • the present disclosure provides a backlight module.
  • the backlight module includes the light guiding component 20 and the light source 10 described in the above embodiments, and the light source 10 is disposed on a light incident surface of the light guiding plate.
  • the backlight module adopts the design concept of LED+ light guide plate, abandoning the plastic frame and the light-shielding tape, and adopts the surface coating and coating form of the light guide plate instead, and realizes the frameless design, which can satisfy the ultra-thin and narrow display module.
  • the requirements of the frame omits the multilayer optical film, plastic frame and various tapes, which saves raw material cost and processing and assembly cost, improves product competitiveness, and avoids many raw materials such as unqualified film cutting and edge burrs. , scratching, etc., but also eliminate the bad assembly process such as offset, foreign matter, dirt, etc., greatly improve the product yield, and the structure of the backlight module is simple, compared with the complex structure of the traditional multilayer film
  • the reliability of the product is good. In the reliability test, many defects such as water ingress, wrinkles, Newton's rings and the like are avoided, and the customer's certification can be more easily passed.
  • the specific kind of the light source that can be employed according to an embodiment of the present disclosure is not particularly limited and may be any light source commonly used in the art.
  • the light source that can be employed is an LED light source. Thereby, the brightness is high, the energy consumption is low, and the environment is friendly.
  • the LED light source may include: an LED flexible wiring board 12; and an LED light bar 11 disposed on a surface of the LED flexible wiring board 12
  • the light-incident receiving surface of the light guide plate is disposed on the light-incident surface of the light guide plate, and the LED light bar 11 is disposed in the light source receiving groove 211.
  • the LED flexible wiring board 12 can connect the LED light bar to other components such as a power source while supporting the function of the LED light bar 11.
  • the light emitting surface 112 of the LED light bar 11 is parallel to the surface of the LED flexible wiring board 12 (see FIG. 7A for a schematic structural view).
  • the light emitting surface 112 of the LED light bar 11 is disposed perpendicular to the LED flexible circuit board 12 (see FIG. 7B for a schematic structural view), and the setting manner of the present disclosure can ensure that the light emitted by the LED light bar enters more.
  • the light guide plate can effectively improve the light utilization efficiency.
  • the specific size of the LED light bar that can be employed is not particularly limited as long as it can be accommodated in the light source housing groove.
  • the length X1 and the width Y1 of the LED strip are respectively smaller than the length X and the width Y of the light source receiving groove.
  • the thickness H1 of the LED light bar is the same as the depth H of the light source receiving groove. This can ensure that the light-to-light coupling distance between the LED and the light guide plate is zero, ensuring maximum light utilization.
  • the LED flexible wiring board is provided with a third reflective layer toward one side of the light guiding component.
  • a third reflective layer is disposed on the surface 121 of the LED flexible wiring board.
  • the third reflective layer can reflect the light incident on the LED flexible circuit board into the light guide plate, thereby improving the brightness and preventing light leakage.
  • the material forming the third reflective layer is not particularly limited, and those skilled in the art can flexibly select according to actual needs.
  • the LED flexible circuit board surface 121 is attached with a double-sided tape, wherein the white or silver surface of the tape is bonded to the light guide plate, and the black surface is bonded to the LED flexible circuit board. While fixing the LED flexible circuit board, it can effectively reflect light to the light guide plate, improve brightness and prevent light leakage.
  • the LED flexible circuit board surface 121 may also be formed by coating or coating to form a third reflective layer, and then bonded to the light guide plate by a solid glue or a liquid glue. It is also possible to achieve the purpose of increasing the brightness and preventing light leakage, as well as fixing the flexible circuit board of the LED.
  • the film module may further include other film layers such as a prism film, thereby maximizing the brightness of the light-emitting surface and further improving the performance of the backlight module.
  • the present disclosure provides a display device.
  • the display device includes the backlight module described in the above embodiments.
  • the display device has all the features and advantages of the light guiding component and the backlight module described above, and will not be further described herein.
  • the specific type of the display device is not particularly limited, and may be any device, device, or the like having a display function, such as but not limited to a display panel, a mobile phone, a tablet computer, a computer display, a television, a game. Machines, wearable devices, and various household and living appliances with display functions.
  • the display device further includes the necessary structures and components of the conventional display device, and the display panel is exemplified, except that the backlight module described above is included.
  • the display panel is exemplified, except that the backlight module described above is included.
  • the backlight module described above is included.
  • the present disclosure provides a method of making a light directing component. According to an embodiment of the present disclosure, referring to FIG. 9, the method includes the following steps:
  • S100 Providing a light guide plate having a light emitting surface and a back surface opposite to each other, and a side surface contacting the light emitting surface and the back surface.
  • the light guide plate provided in the step is not particularly limited, and may be any light guide plate commonly used in the art.
  • the material of the light guide plate and the specific structure of the light guide plate may be the same as the light guide plate described in the front light guide assembly. Consistent, no longer repeat them here.
  • the illuminating surface may be subjected to a parallel dicing process or a face grinding process before forming the first reflective layer.
  • the first reflective layer may be formed by a coating, printing, spraying, or plating process. Therefore, the operation is simple, convenient, and easy to control, and has no special requirements for equipment and technicians, and is easy to realize large-scale production. Moreover, the first reflective layer formed by the above method can avoid defects such as unsatisfactory cutting, edge burrs, scratches, etc. in the subsequent cutting and the like, and greatly improves the product yield of the light guiding component.
  • a specific step of forming the first reflective layer can be flexibly selected by a person skilled in the art according to requirements, for example, a full-surface reflective layer covering the light surface can be formed by a coating, printing, spraying or coating process, and then Patterning the entire reflective layer, for example, forming a light-transmitting hole pattern by a patterning process, or forming a mask corresponding to the light-transmitting hole pattern on the light-emitting surface, and then directly coating, printing, spraying, or The coating process forms a first reflective layer and then removes the mask.
  • the first reflective layer is formed by spraying. For example, referring to FIG.
  • the step of forming the first reflective layer may include: forming a mask 30 on the light-emitting surface 212 of the light guide plate, the mask 30 has a pattern conforming to the light-transmitting holes, and then a first reflective layer having a light-transmitting hole is formed by a spraying device, and then the mask is removed.
  • the diffusion layer includes a plate body and a plurality of protrusions disposed on a surface of the plate body, the plurality of protrusions and a plurality of protrusions
  • the light-transmitting holes are in one-to-one correspondence, and the light-transmitting holes receive corresponding protrusions.
  • the diffusion layer may be formed by a coating, printing, spraying, or coating process.
  • the material forming the diffusion layer may be mixed to obtain a slurry, and then a diffusion layer is formed on the side of the first reflective layer away from the light guide plate by a coating method.
  • the method may further include:
  • S400 forming a second reflective layer on a portion of the side surface and the back surface.
  • the side surface is subjected to a sanding treatment before the second reflective layer is formed.
  • the roughness can be increased, so that most of the light rays scatter on the surface instead of the specular reflection, so that the appearance of the edge bright lines can be avoided.
  • the method of preparing a light guiding component can be effectively used for preparing the light guiding component described above, wherein the light guiding plate, the first reflective layer, the second reflective layer, and the diffusion layer are all described above. Consistent, no more details here.
  • the method avoids the cumbersome film processing and assembly process in the prior art, greatly improves the production yield and production efficiency, and is easy to realize mass production.
  • the light guide assembly obtained by the invention reduces the cumbersome processing and assembly process of the film in the prior art, and avoids the defects in the processing and assembly process of the film, such as dimensional instability, foreign matter, scratches, assembly deviation, etc., which is greatly reduced. Production costs, while also increasing production efficiency and yield.
  • the brightness uniformity of the light guiding component can be achieved by adjusting the arrangement of the light-transmissive holes of the first reflective layer, thereby avoiding modifying the light guide plate mold, reducing the mold repair cost and improving the cycle, and improving the light guide plate mold and the mold base. The versatility of the processed light guide plate.
  • the present disclosure has at least the following advantageous effects: the light guiding assembly of the present disclosure enables the light guiding assembly of the embodiment of the present disclosure to be guided compared to separately providing the reflective film layer and the diffusion film layer (ie, there is no filling between the film layers) The light emitted from the light exit surface of the light plate is more uniform and the optical effect is improved.
  • the backlight module and the display device of the present disclosure each have the above-described light guiding component, and therefore have the effect of uniform light emission.
  • the method for preparing a light guiding component of the present disclosure can effectively and quickly prepare the light guiding component described above, and the steps are simple, avoiding the cumbersome film processing and assembly process in the prior art, greatly improving the production yield and production. Efficiency and easy to achieve mass production.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may include one or more of the features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed”, and the like, are to be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated or defined otherwise. , or integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements.
  • the specific meanings of the above terms in the present disclosure can be understood by those skilled in the art on a case-by-case basis.
  • the first feature "on” or “under” the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

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Abstract

一种导光组件及其制备方法、背光模组和显示装置。导光组件包括：导光板（21），导光板（21）具有彼此相对的出光面（212）和背面（216），以及与出光面（212）和背面（216）相接的侧面（210）；第一反射层（22），第一反射层（22）设置于出光面（212）上，且具有多个透光孔（221）；设置于第一反射层（22）远离导光板（21）的一侧的扩散层（24），扩散层（24）包括板状体（241）和布置在板状体（241）表面的多个突起（242），多个突起（242）与多个透光孔（221）一一对应，且透光孔（221）容纳对应的突起（242）。

Description

导光组件及其制备方法、背光模组和显示装置
相关申请
本申请要求保护在2017年4月24日提交的申请号为201710271269.7的中国专利申请的优先权，该申请的全部内容以引用的方式结合到本文中。
技术领域
本公开涉及显示技术领域，具体的，涉及导光组件及其制备方法、背光模组和显示装置。
背景技术
现阶段显示屏发展趋向于窄边框、超薄、高亮度，传统的背光源已无法满足日益升高的品位要求。由于传统的背光源是LED+多层膜材+导光组件+胶框+遮光胶带的模式，在对应上述高品位规格时，会造成亮线、漏光、褶皱、开胶等多种不良，大大降低了成品良率，增加成本。另一方面，超薄、窄边框对膜材的裁切及组装要求极高，现有工艺水平无法满足，且对出光的均匀性要求也逐渐提高。因而，目前的背光源仍有待改进。
公开内容
在本公开的一个方面，本公开提供了一种导光组件。根据本公开的实施例，该导光组件包括：导光板，所述导光板具有彼此相对的出光面和背面，以及与所述出光面和背面相接的侧面；第一反射层，所述第一反射层设置于所述出光面上，且具有多个透光孔；设置于所述第一反射层远离所述导光板的一侧的扩散层，所述扩散层包括板状体和布置在所述板状体表面的多个突起，所述多个突起与多个所述透光孔一一对应，且所述透光孔容纳对应的突起。
根据本公开的实施例，该导光组件进一步包括第二反射层，所述第二反射层设置于所述侧面的一部分及所述背面上。
根据本公开的实施例，所述第一反射层、扩散层和第二反射层各自通过涂覆、印刷、喷涂或镀膜工艺形成。
根据本公开的实施例，所述扩散层是一体的。
根据本公开的实施例，所述背面具有多个微结构。
根据本公开的实施例，所述侧面的一部分用作入光面；沿着远离所述入光面的方向，所述第一反射层上单位面积内所述透光孔的面积之和逐渐减小。
根据本公开的实施例，所述透光孔的面积一定；所述侧面的一部分用作入光面；沿着远离所述入光面的方向，相邻两个所述透光孔之间的间距逐渐减小。
根据本公开的实施例，相邻的两个透光孔之间的间距一定；所述侧面的一部分用作入光面；沿着远离所述入光面的方向，所述透光孔的面积逐渐增大。
根据本公开的实施例，所述导光板还包括入光面；所述入光面上设置有光源容纳槽。
在本公开的另一方面，本公开提供了一种背光模组。根据本公开的实施例，该背光模组包括：以上实施例所述的导光组件；光源，所述光源布置在所述导光板的入光面上。本领域技术人员可以理解，该背光模组具有前面所述的导光组件的所有特征和优点，在此不再一一赘述。
根据本公开的实施例，所述光源为LED光源。
根据本公开的实施例，所述LED光源包括：LED柔性线路板；和LED灯条，所述LED灯条设置于所述LED柔性线路板的表面上，其中，所述入光面上设置有光源容纳槽，所述LED灯条设置在所述光源容纳槽内。
根据本公开的实施例，所述LED灯条的光发射面与所述LED柔性线路板的表面平行。
在本公开的再一方面，本公开提供了一种显示装置。根据本公开的实施例，所述显示装置包括以上实施例所述的背光模组。本领域技术人员可以理解，该显示装置具有前面所述的导光组件和背光模组的全部特征和优点，在此不再一一赘述。
在本公开的又一方面，本公开提供了一种制备导光组件的方法。根据本公开的实施例，该方法包括：提供导光板，所述导光板具有彼此相对的出光面和背面，以及与所述出光面和背面相接的侧面；所述 侧面的一部分用作入光面；在所述出光面上形成第一反射层，所述第一反射层具有多个透光孔；以及在所述第一反射层远离所述导光板的一侧形成扩散层，所述扩散层包括板状体和布置在所述板状体表面的多个突起，所述多个突起与多个所述透光孔一一对应，且所述透光孔容纳对应的突起。通过该方法可以有效、快速的制备前面所述的导光组件，且步骤简单，避免了现有技术中繁琐的膜材加工及组装工序，大大提高了生产良率和生产效率，且易于实现大规模生产。
根据本公开的实施例，所述第一反射层和扩散层各自通过涂覆、印刷、喷涂或镀膜工艺形成。
根据本公开的实施例，该方法进一步包括在所述侧面的一部分及所述背面上形成第二反射层，所述第二反射层通过涂覆、印刷、喷涂或镀膜工艺形成。
根据本公开的实施例，在形成所述第二反射层之前，对所述侧面的至少一部分进行磨砂处理。
根据本公开的实施例，在形成第一反射层之前，对所述出光面进行切割处理或磨面处理。
根据本公开的实施例，在所述出光面上形成第一反射层进一步包括：在所述出光面上形成掩膜版，所述掩膜版的图案与所述与透光孔的图案对应；通过涂覆、印刷、喷涂或镀膜工艺形成所述第一反射层；以及去除所述掩膜。
附图说明
图1显示了根据本公开一个实施例的导光组件的爆炸图。
图2显示了根据本公开一个实施例的导光组件的剖面结构示意图。
图3显示了根据本公开一个实施例的导光板的结构示意图。
图4显示了根据本公开一个实施例的第一反射层的平面结构示意图。
图5显示了根据本公开一个实施例的背光模组的爆炸图。
图6显示了根据本公开一个实施例的背光模组的剖面结构示意图。
图7A显示了根据本公开一个实施例的LED光源的结构示意图。
图7B显示了现有LED光源的结构示意图。
图8显示了根据本公开一个实施例的导光板第四侧面217的平面 结构示意图。
图9显示了本公开一个实施例的制备导光组件的方法的流程示意图。
图10显示了本公开另一个实施例的制备导光组件的方法的流程示意图。
图11显示了根据本公开一个实施例的形成第一反射层的示意图。
图12显示了根据本公开一个实施例的导光板的剖面结构示意图。
具体实施方式
下面详细描述本公开的实施例。下面描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。实施例中未注明具体技术或条件的，按照本领域内的文献所描述的技术或条件或者按照产品说明书进行。所用试剂或仪器未注明生产厂商者，均为可以通过市购获得的常规产品。
目前LED+多层膜材+导光组件+胶框+遮光胶带的传统背光源应用于窄边框、超薄、高亮度的显示屏时会出现亮线、漏光、褶皱、开胶等多种不良，且多层光学膜材的组装、加工等工序会造成组装偏位、划伤、异物等问题。
在本公开的一个方面，本公开提供了一种导光组件。根据本公开的实施例，参照图1至图3，该导光组件包括：导光板21，所述导光板21具有彼此相对的出光面212和背面216，以及与所述出光面212和背面216相接的侧面210；第一反射层22，所述第一反射层22设置于所述出光面212上，且具有多个透光孔221。扩散层24设置于所述第一反射层22远离所述导光板21的一侧，所述扩散层24包括板状体241和布置在所述板状体241表面的多个突起242，所述多个突起242与多个所述透光孔221一一对应，且所述透光孔221容纳对应的突起242。
具体的，参照图3，导光板的侧面210包括四个部分，即第一侧面213、第二侧面214、第三侧面215和第四侧面217。所述侧面的一部分可以例如用作入光面。
该导光组件中的反射层和扩散层可以通过涂覆、镀膜等方式形成，减少了现有技术中繁琐的膜材加工及组装工序，避免了膜材加工及组 装过程不良如尺寸不稳定、异物、划伤、组装偏位等，大大降低了生产成本，同时也提高了生产效率及良率。并且，还可以满足现下对现实模组的窄边框和超薄化的要求。此外，该导光组件的亮度均一性可以通过调整第一反射层透光孔的排布来实现，避免了修改导光板模具，降低了修模费用及改善周期，提高了导光板模具及该模具所加工的导光板的通用性，且可延长使用寿命。相应的，通过涂覆、镀膜等方式制作，使得扩散层的一部分(即，所述多个突起)填充于反射层的透光孔内，这样能够使从导光板出光面出射的光线更加均匀，提高光学效果。
根据本公开的实施例，该导光组件可以进一步包括第二反射层23，所述第二反射层23设置于所述侧面210的一部分及所述背面216上。由此，可以将导光板内部折射出的光线反射到出光方向再利用，大大提高光利用率。
需要说明的是，本文中所采用的描述方式“扩散层的一部分填充于透光孔内”应做广义理解，可以是扩散层填充透光孔的一部分，也可以是扩散层填充透光孔的全部。
根据本公开的实施例，形成导光板的具体材料没有特别限制，可以采用本领域常规导光板的材料，例如包括但不限于聚甲基丙烯酸甲酯、聚碳酸酯等，由此，具有较好的透光性和力学性能。
根据本公开的实施例，所述扩散层24是一体的。在本公开的上下文中，“扩散层是一体的”意味着所述板状体241和所述多个突起242是一体形成的。
根据本公开的实施例，为了进一步提高光利用率，导光板的背面还可以设置有多个微结构。当光线射到各个微结构时，反射光会往各个角度扩散，然后破坏反射条件由导光板正面射出。通过设置各种疏密、大小不一的微结构，可使导光板均匀发光。在本公开的实施例中，微结构的大小、形状、分布方式等没有特别的限制，可以根据实际需要进行选择，具体的，以提高导光板发光均匀性为佳。
根据本公开的实施例，为了进一步提高导光板的发光均匀性和使用性能，导光板的侧面的至少一部分表面可以预先经过磨砂处理。由此，可以有效增加表面粗糙度，使得光线射到侧面上时，反射光线向四周扩散，进而可以避免边缘亮线的产生。参照图3，第一侧面213、 第二侧面214和第三侧面215可以预先经过磨砂处理，由此避免了边缘亮线。
根据本公开的实施例，为了进一步提高导光板的使用性能，导光板的出光面可以预先经过切割处理或磨面处理。由此，可以进一步提高出光均匀性。
需要说明的是，本文中所采用的描述方式“切割处理”是指通过切割在导光板的出光面形成圆弧形的棱镜结构，即R-CUT结构，具体结构示意图参见图12。
根据本公开的实施例，参照图3，为了更好的与光源配合作用，提高光线利用率，导光板的入光面(即第四侧面217)上还可以设置有光源容纳槽211。由此，可以将光源设置在光源容纳槽211中，这种设计可以保证光源出射光更多进入导光板，进而可以提高光利用率，实现高辉度。
根据本公开的实施例，所述第一反射层、扩散层和第二反射层各自通过涂覆、印刷、喷涂或镀膜工艺形成。由此，工艺成熟、步骤简单、操作方便、易于实现大规模生产，且克服了现有技术中多层膜材的加工、组装等复杂的操作步骤，节省人力物力，经济性好。而且，该导光组件中采用上述第一反射层、扩散层和第二反射层，可以避免膜材切割不合格、边缘毛刺、划伤，以及组装过程不良，如偏位、异物、脏污等问题，使得该导光组件可以适用于窄边框、超薄、高亮度等高规格显示面板，满足更高的使用要求。
根据本公开的实施例，形成第一反射层、第二反射层的材料没有特别限制，只要满足反射性能要求即可。在本公开的一些实施例中，形成第一反射层和第二反射层的材料包括但不限于银、铝等金属。由此，具有较高的反射率，光利用率较高。
根据本公开的实施例，形成扩散层的材料也没有特别限制，只要具有扩散光的效果即可。在本公开的一些实施例中，扩散层可以由基质材料和分散于基质材料中的扩散粒子形成，基质材料可以为聚合物，扩散粒子可以为无机氧化物粒子等，只要其具有合适的折射率，使得形成的扩散层具有理想的扩散效果即可，具体材料本领域技术人员可以根据需要灵活选择。
根据本公开的实施例，第一反射层上设置有透光孔，不仅能够保 证光线有效透过第一反射层，还可以通过调整透光孔的分布控制导光板的出光均匀性。根据本公开的实施例，透光孔的形状、具体分布方式没有特别限制，只要满足使用要求，本领域技术人员可以根据需要灵活选择。在本公开的一些实施例中，透光孔的形状可以包括但不限于圆形、矩形、正方形及其他规则或不规则形状。
在本公开的一些实施例中，所述侧面的一部分用作入光面；沿着远离所述入光面的方向，所述第一反射层上单位面积内所述透光孔的面积之和逐渐减小。
可选地，在本公开的一些具体实施例中，所述透光孔的面积一定；所述侧面的一部分用作入光面；沿着远离所述入光面的方向，相邻两个所述透光孔之间的间距逐渐减小。
可替换地，在本公开的一些具体实施例中，相邻的两个透光孔之间的间距一定；所述侧面的一部分用作入光面；沿着远离所述入光面的方向，所述透光孔的面积逐渐增大。
例如以透光孔为圆形时为例进行说明，参照图4，沿着远离所述入光面的方向，所述多个透光孔按照以下至少之一的方式分布：所述透光孔的直径
Figure PCTCN2018073573-appb-000001
一定，相邻两个所述透光孔之间的间距Pn逐渐减小；相邻两个所述透光孔之间的间距Pn一定，所述透光孔的直径
Figure PCTCN2018073573-appb-000002
逐渐增大。由此，可以使得导光组件的出光均匀度较高。
在本公开的另一方面，本公开提供了一种背光模组。根据本公开的实施例，参照图5和图6，该背光模组包括：以上实施例所述的导光组件20和光源10，所述光源10设置于所述导光板的入光面上。
该背光模组采用LED+导光板的设计理念，放弃了胶框及遮光胶带，采用导光板表面涂覆、镀膜的形式取而代之，实现了无边框的设计，可以满足现下对显示模组超薄和窄边框的要求，省略了多层光学膜材、胶框及各种胶带，节省了原料成本和加工组装成本，提高产品竞争力，同时避免了诸多原材不良如膜材裁切不合格、边缘毛刺、划伤等，同时还根除了组装过程不良如偏位、异物、脏污等，极大的提高了产品良率，且该背光模组的结构简单，相对于传统多层膜材的复杂结构，产品的可靠性较好，在可靠性试验中，避免了许多不良如进水、褶皱、牛顿环等顽固不良，可以更加容易的通过客户的认证。
根据本公开的实施例，可以采用的光源的具体种类没有特别限制， 可以为本领域常用的任何光源。在本公开的一些实施例中，可以采用的光源为LED光源。由此，亮度较高，且能耗较低，环境友好。
根据本公开的实施例，参照图5和图6，所述LED光源可以包括：LED柔性线路板12；和LED灯条11，所述LED灯条11设置于所述LED柔性线路板12的表面上，其中，所述导光板的入光面上设置有光源容纳槽，所述LED灯条11设置在所述光源容纳槽211内。由此，LED柔性线路板12在起到支撑LED灯条11的作用的同时，可以使得LED灯条与其他部件，如电源等连接。
根据本公开的实施例，所述LED灯条11的光发射面112与所述LED柔性线路板12的表面平行(结构示意图参见图7A)。相对于现有LED光源中将LED灯条11的光发射面112设置为垂直于LED柔性线路板12(结构示意图参见图7B)，本公开的设置方式可以保证LED灯条发出的光更多进入导光板，从而可以有效提高光利用率。
根据本公开的实施例，可以采用的LED灯条的具体尺寸没有特比限制，只要能够容纳于光源容纳槽中即可。在本公开的一些实施例中，参照图6、图7A和图8，所述LED光条的长X1和宽Y1分别小于所述光源容纳槽的长X和宽Y。由此，可以便于LED灯条的装配、返工(Rework)等。在本公开的一些实施例中，所述LED灯条的厚度H1与所述光源容纳槽的深度H相同。这样可以保证LED与导光板入光面光耦合距离为零，确保光利用率最大。
根据本公开的实施例，为了进一步提高光利用率，所述LED柔性线路板朝向所述导光组件的一侧设置有第三反射层。参照图7A，即LED柔性线路板的表面121上设置有第三反射层。由此，第三反射层可以将入射到LED柔性线路板上的光线反射到导光板中，提高辉度，同时可以防止漏光。
根据本公开的实施例，形成第三反射层的材料没有特别限制，本领域技术人员可以根据实际需要灵活选择。在本公开的一个具体示例中，所述LED柔性线路板面121上贴附有双面胶带，其中胶带白色或者银色面与导光板粘接，黑色面与LED柔性线路板粘接。在固定LED柔性线路板的同时，可以有效将光反射到导光板，提高辉度并防止漏光。在本公开的另一个具体示例中，所述LED柔性线路板面121，也可采用涂覆或者镀膜的方式形成第三反射层，再通过固体胶或者液体 胶与导光板粘接。同样可以达到提高辉度并防止漏光、以及固定LED柔性线路板的目的。
根据本公开的实施例，为了进一步提高背光模组的使用性能，其还可以进一步包括棱镜膜等其他膜层，由此能够使得出光面的亮度最大，进一步提高背光模组的使用性能。
在本公开的再一方面，本公开提供了一种显示装置。根据本公开的实施例，所述显示装置包括以上实施例所述的背光模组。本领域技术人员可以理解，该显示装置具有前面所述的导光组件和背光模组的全部特征和优点，在此不再一一赘述。
根据本公开的实施例，该显示装置的具体种类不受特别限制，可以为任何具有显示功能的装置、设备等，例如包括但不限于显示面板、手机、平板电脑、计算机显示器、电视机、游戏机、可穿戴设备、及各种具有显示功能的家用、生活电器等。
本领域技术人员可以理解，除了前面描述的背光模组，该显示装置还包括常规显示装置所具有的必要的结构和部件，以显示面板为例，其除了包括前面所述的背光模组外，还具有液晶显示模组或有机电致发光显示模组等，在此不再过多赘述。
在本公开的又一方面，本公开提供了一种制备导光组件的方法。根据本公开的实施例，参照图9，该方法包括以下步骤：
S100：提供导光板，所述导光板具有彼此相对的出光面和背面，以及与所述出光面和背面相接的侧面。
根据本公开的实施例，该步骤中提供的导光板没有特别限制，可以为本领域常用的任何导光板，形成导光板的材料、导光板的具体结构可以与前面导光组件中描述的导光板一致，在此不再一一赘述。
S200：在所述出光面上形成第一反射层，所述第一反射层具有多个透光孔。
根据本公开的实施例，在形成第一反射层之前，可以对所述出光面进行平行切割处理或磨面处理。由此，有利于提高导光组件的出光均匀性。
根据本公开的实施例，该步骤中，可以通过涂覆、印刷、喷涂或镀膜工艺形成第一反射层。由此，操作简单、方便，易于控制，对设备和技术人员没有特殊要求，易于实现规模化生产。而且，通过上述 方法形成的第一反射层，可以在后续切割等步骤中避免裁切不合格、边缘毛刺、划伤等不良，大大提高了导光组件的产品良率。
根据本公开的实施例，形成第一反射层的具体步骤本领域技术人员可以根据需要灵活选择，例如，可以先通过涂覆、印刷、喷涂或镀膜工艺形成覆盖出光面的整面反射层，然后对整面的反射层进行图案化，例如通过构图工艺等形成透光孔图案，也可以先在出光面上形成与透光孔图案相对应的掩膜，然后直接通过涂覆、印刷、喷涂或镀膜工艺形成第一反射层，再去除掩膜。根据本公开的一个具体示例，通过喷涂方式形成第一反射层为例进行说明，参照图11，形成第一反射层的步骤可以包括：在导光板的出光面212上形成掩膜30，掩膜30具有与透光孔一致的图案，然后通过喷涂装置形成具有透光孔的第一反射层，然后去除掩膜。
S300：在所述第一反射层远离所述导光板的一侧形成扩散层；所述扩散层包括板状体和布置在所述板状体表面的多个突起，所述多个突起与多个所述透光孔一一对应，且所述透光孔容纳对应的突起。
根据本公开的实施例，该步骤中，可以通过涂覆、印刷、喷涂或镀膜工艺形成扩散层。在本公开的一些实施例中，可以将形成扩散层的材料混合得到浆料，然后通过涂覆的方法在第一反射层远离所述导光板的一侧形成扩散层。
根据本公开的实施例，参照图10，该方法可以进一步包括：
S400：在所述侧面的一部分及所述背面上形成第二反射层。
根据本公开的实施例，在形成所述第二反射层之前，对所述侧面进行磨砂处理。由此，可以加大粗糙度，使得光线射到该面上时大多发生散射而不是镜面反射，这样可以避免边缘亮线的出现。
根据本公开的实施例，该制备导光组件的方法可以有效用于制备前面所述的导光组件，其中涉及的导光板、第一反射层、第二反射层和扩散层均可与前文描述一致，在此不再过多赘述。
该方法避免了现有技术中繁琐的膜材加工及组装工序，大大提高了生产良率和生产效率，且易于实现大规模生产。另外，制备获得的导光组件减少了现有技术中繁琐的膜材加工及组装工序，避免了膜材加工及组装过程不良如尺寸不稳定、异物、划伤、组装偏位等，大大降低了生产成本，同时也提高了生产效率及良率。而且该导光组件的 亮度均一性可以通过调整第一反射层透光孔的排布来实现，避免了修改导光板模具，降低了修模费用及改善周期，提高了导光板模具及该模具所加工的导光板的通用性。
本公开至少具有以下有益效果：本公开的导光组件，相比于单独设置反射膜层以及扩散膜层(即，膜层之间没有填充)，本公开实施例的导光组件能够使从导光板出光面出射的光线更加均匀，提高光学效果。
本公开的背光模组和显示装置，均具有上述导光组件，因此也具有出光均匀的效果。
本公开的制备导光组件的方法可以有效、快速的制备前面所述的导光组件，且步骤简单，避免了现有技术中繁琐的膜材加工及组装工序，大大提高了生产良率和生产效率，且易于实现大规模生产。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本公开中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
在本公开中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中 间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本公开的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域的普通技术人员在本公开的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (19)

  1. 一种导光组件，包括：
    导光板，所述导光板具有彼此相对的出光面和背面，以及与所述出光面和背面相接的侧面；
    第一反射层，所述第一反射层设置于所述出光面上，且具有多个透光孔；
    设置于所述第一反射层远离所述导光板的一侧的扩散层，所述扩散层包括板状体和布置在所述板状体表面的多个突起，所述多个突起与多个所述透光孔一一对应，且所述透光孔容纳对应的突起。
  2. 根据权利要求1所述的导光组件，进一步包括：
    第二反射层，所述第二反射层设置于所述侧面的一部分及所述背面上。
  3. 根据权利要求2所述的导光组件，其中，所述第一反射层、扩散层和第二反射层各自通过涂覆、印刷、喷涂或镀膜工艺形成。
  4. 根据权利要求1所述的导光组件，其中，所述扩散层是一体的。
  5. 根据权利要求1所述的导光组件，其中，所述背面具有多个微结构。
  6. 根据权利要求1所述的导光组件，其中，所述侧面的一部分用作入光面；沿着远离所述入光面的方向，所述第一反射层上单位面积内所述透光孔的面积之和逐渐减小。
  7. 根据权利要求1所述的导光组件，其中，所述透光孔的面积一定；所述侧面的一部分用作入光面；沿着远离所述入光面的方向，相邻两个所述透光孔之间的间距逐渐减小。
  8. 根据权利要求1所述的导光组件，其中，相邻的两个透光孔之间的间距一定；所述侧面的一部分用作入光面；沿着远离所述入光面的方向，所述透光孔的面积逐渐增大。
  9. 根据权利要求1所述的导光组件，其中，所述导光板还包括入光面；所述入光面上设置有光源容纳槽。
  10. 一种背光模组，包括：
    权利要求1-9中任一项所述的导光组件；以及
    光源，所述光源布置在所述导光板的入光面上。
  11. 根据权利要求10所述的背光模组，其中，所述光源为LED光源，且所述LED光源包括：
    LED柔性线路板；和
    LED灯条，所述LED灯条设置于所述LED柔性线路板的表面上；
    其中，所述入光面上设置有光源容纳槽，所述LED灯条设置在所述光源容纳槽内。
  12. 根据权利要求10所述的背光模组，其中，所述LED灯条的光发射面与所述LED柔性线路板的表面平行。
  13. 一种显示装置，包括权利要求10-12中任一项所述的背光模组。
  14. 一种制备导光组件的方法，包括：
    提供导光板，所述导光板具有彼此相对的出光面和背面，以及与所述出光面和背面相接的侧面；
    在所述出光面上形成第一反射层，所述第一反射层具有多个透光孔；以及
    在所述第一反射层远离所述导光板的一侧形成扩散层，所述扩散层包括板状体和布置在所述板状体表面的多个突起，所述多个突起与多个所述透光孔一一对应，且所述透光孔容纳对应的突起。
  15. 根据权利要求14所述的方法，其中，所述第一反射层和扩散层各自通过涂覆、印刷、喷涂或镀膜工艺形成。
  16. 根据权利要求14所述的方法，进一步包括：在所述侧面的一部分及所述背面上形成第二反射层，所述第二反射层通过涂覆、印刷、喷涂或镀膜工艺形成。
  17. 根据权利要求16所述的方法，还包括：在形成所述第二反射层之前，对所述侧面的至少一部分进行磨砂处理。
  18. 根据权利要求14所述的方法，还包括：在形成第一反射层之前，对所述出光面进行切割处理或磨面处理。
  19. 根据权利要求14所述的方法，其中，在所述出光面上形成第一反射层包括：
    在所述出光面上形成掩膜，所述掩膜的图案与透光孔的图案对应；
    通过涂覆、印刷、喷涂或镀膜形成所述第一反射层；以及
    去除所述掩膜。
PCT/CN2018/073573 2017-04-24 2018-01-22 导光组件及其制备方法、背光模组和显示装置 Ceased WO2018196448A1 (zh)

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