WO2016086416A1 - 一种量子点背光模组以及显示装置 - Google Patents

一种量子点背光模组以及显示装置 Download PDF

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Publication number
WO2016086416A1
WO2016086416A1 PCT/CN2014/093149 CN2014093149W WO2016086416A1 WO 2016086416 A1 WO2016086416 A1 WO 2016086416A1 CN 2014093149 W CN2014093149 W CN 2014093149W WO 2016086416 A1 WO2016086416 A1 WO 2016086416A1
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WIPO (PCT)
Prior art keywords
quantum dot
guide plate
light
light guide
backlight module
Prior art date
Application number
PCT/CN2014/093149
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English (en)
French (fr)
Inventor
程艳
王将峰
Original Assignee
深圳市华星光电技术有限公司
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Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to DE112014007222.2T priority Critical patent/DE112014007222T5/de
Priority to JP2017545992A priority patent/JP6389570B2/ja
Priority to US14/416,190 priority patent/US9618681B2/en
Priority to GB1708098.7A priority patent/GB2547589B/en
Priority to EA201700281A priority patent/EA033543B1/ru
Priority to KR1020177013802A priority patent/KR102068511B1/ko
Publication of WO2016086416A1 publication Critical patent/WO2016086416A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—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
    • 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
    • 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
    • G02B6/0033—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
    • G02B6/0035—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
    • G02B6/0045—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 by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped 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
    • 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along 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
    • G02B6/0066—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
    • G02F1/133602—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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a quantum dot backlight module and a display device.
  • Semiconductor quantum dot phosphor is a new type of white LED (Light Emitting) Diode (light-emitting diode) luminescent material, whose particles are larger than water molecules and smaller than viruses. Based on their own particle size, the light emitted by the standard blue light-emitting diode source can be converted into light of different wavelengths. The particles lasing long-wavelength light (such as red light), while the smaller particles are converted to short-wavelength light (such as green light), which mix to form a new spectrum.
  • Quantum dot enhancement film can be prepared by using such quantum dot characteristics Dot Enhanced Film (QDEF), which uses a standard blue LED light source to achieve high-quality three primary colors of white light for liquid crystal display (Liquid crystal Display, referred to as LCD), has reached a new level of display performance.
  • QDEF Dot Enhanced Film
  • LCD liquid crystal Display
  • quantum dot phosphors have the advantages of wide absorption and narrow emission, higher luminous efficiency, longer service life, higher color rendering, and better color purity. Therefore, display devices using quantum dot luminescent materials are used. Has a very high color gamut and a high display quality.
  • the backlight module mainly includes a blue light emitting diode 10, a reflective sheet 20, a light guide plate 30 disposed on the upper side of the reflective sheet 20, a quantum dot film 40 disposed on the upper side of the light guide plate 30, and a quantum dot film.
  • the optical film 50 on the upper side of the 40, and the blue light emitting diode 10 are disposed on the left side of the light guide plate 30.
  • the quantum dot film 40 can convert the light emitted by the blue light emitting diode 10 into red and green.
  • the quantum dot film 40 is disposed in the blue light emitting diode 10, there is a problem that the light source of the blue light emitting diode 10 cannot be dissipated; in order to solve the heat dissipation problem, the quantum dot film 40 is currently disposed above the light guide plate 30, although The problem of heat dissipation can be effectively solved, and the effective conversion of blue to red and green wavelengths can be realized, but the size of the quantum dot film 40 is the same as that of the liquid crystal display panel, so that the quantum dot material cannot be effectively utilized.
  • the quantum dot materials are mostly cadmium-containing materials and are toxic, packaging in the process of fabricating the film is a big problem in the periphery, and the poor packaging may cause cadmium pollution, which is very harmful.
  • the quantum dot material itself is inactivated by the influence of oxygen and water in the air.
  • An object of the present invention is to provide a quantum dot backlight module and a display device, which are intended to solve the problem that the quantum dot film is disposed above the light guide plate in the prior art, and the quantum dot material cannot be effectively utilized, and Packaging in the process of making a film is a big problem in the surrounding process. Poor packaging results in cadmium contamination, which is very harmful.
  • the quantum dot material itself is affected by the influence of oxygen and water in the air.
  • a quantum dot backlight module comprising: a light emitting diode, a reflective sheet, a light guide plate, a plurality of dots, and a quantum dot; the light guide plate is disposed above the reflective sheet, the plurality of The quantum dots are disposed on the surface of the light guide plate, the quantum dots are encapsulated in the network dots, and the light emitting diodes are disposed on the side of the light guide plate, wherein the quantum dots are provided with semiconductor quantum dot fluorescence Powder; the dot is a cylindrical structure;
  • the light guide plate includes a first side and a second side opposite to each other, and a thickness of the first side of the light guide plate is greater than a thickness of the second side, wherein the light guide plate
  • the first side is a side adjacent to the light emitting diode
  • the light emitting diode provides a light source for the light guide plate, and the backlight light emitted by the light emitting diode sequentially passes through the light guide plate and the mesh point, and then converts the light emitted by the light emitting diode light source through the quantum dot. Light of different wavelengths is emitted.
  • the interval between the plurality of dots is t/tan ⁇ c
  • ⁇ c is the incident angle when the light is totally reflected in the light guide plate
  • t is the thickness between the center of the bottom of the adjacent dot on the left side and the bottom of the light guide plate.
  • the quantum dot backlight module further includes: a diffusion sheet disposed above the light guide plate.
  • the quantum dot backlight module further includes: an optical film disposed above the diffusion sheet.
  • the light emitting diode is a blue light emitting diode.
  • the quantum dots comprise red quantum dots and green quantum dots.
  • the side surface of the halftone dot of the cylindrical structure is made of a reflective material.
  • the red quantum dots comprise red quantum dots of large particles and red quantum dots of small particles.
  • the green quantum dots comprise green quantum dots of large particles and green quantum dots of small particles.
  • the optical film is a prism or a diffusion film.
  • a quantum dot backlight module includes: a light emitting diode, a reflective sheet, a light guide plate, a plurality of dots, and a quantum dot; the light guide plate is disposed above the reflective sheet, the plurality of The quantum dots are disposed on the surface of the light guide plate, the quantum dots are encapsulated in the mesh dots, and the light emitting diodes are disposed on the side of the light guide plate, wherein the quantum dots are provided with semiconductor quantum dot phosphors ;
  • the light emitting diode provides a light source for the light guide plate, and the backlight light emitted by the light emitting diode sequentially passes through the light guide plate and the mesh point, and then converts the light emitted by the light emitting diode light source through the quantum dot. Light of different wavelengths is emitted.
  • the dots are cylindrical structures.
  • the light guide plate includes a first side and a second side opposite to each other, and a thickness of the first side of the light guide plate is greater than a thickness of the second side, wherein the light guide plate The first side of the light is adjacent to a side of the light emitting diode.
  • the interval between the plurality of dots is t/tan ⁇ c
  • ⁇ c is the incident angle when the light is totally reflected in the light guide plate
  • t is the thickness between the center of the bottom of the adjacent dot on the left side and the bottom of the light guide plate.
  • the quantum dot backlight module further includes: a diffusion sheet disposed above the light guide plate.
  • the quantum dot backlight module further includes: an optical film disposed above the diffusion sheet.
  • the light emitting diode is a blue light emitting diode.
  • the quantum dots comprise red quantum dots and green quantum dots.
  • the side surface of the mesh point of the cylindrical structure is made of a reflective material.
  • a display device includes a display panel and a quantum dot backlight module, wherein the display panel is disposed relative to the quantum dot backlight module; wherein the quantum dot backlight module comprises: a light emitting diode and a reflection a sheet, a light guide plate, a plurality of dots, and a quantum dot; the light guide plate is disposed above the reflective sheet, and the plurality of mesh dots are spaced apart from each other on a surface of the light guide plate, and the quantum dots are encapsulated in the a light emitting diode disposed on a side of the light guide plate, wherein the quantum dot is provided with a semiconductor quantum dot phosphor;
  • the light emitting diode provides a light source for the light guide plate, and the backlight light emitted by the light emitting diode sequentially passes through the light guide plate and the mesh point, and then converts the light emitted by the light emitting diode light source through the quantum dot. Light of different wavelengths is emitted.
  • the present invention provides a dot arranged with a quantum dot on a surface of a light guide plate; a backlight light emitted from the light emitting diode passes through the light guide plate and the dot, and then the light emitting diode is passed through the quantum dot.
  • the light emitted by the light source is converted into light of different wavelengths, and the quantum dot backlight module designed by the structure can effectively improve the utilization of the quantum dot material.
  • the dots are arranged at intervals and the quantum dots are encapsulated in the dots, there is no need to A whole piece of quantum dot film, which saves the use of quantum dot materials, reduces the cost, and achieves the purpose of effectively dissipating the light emitting diode and achieving a wide color gamut.
  • FIG. 1 is a schematic structural view of a backlight module provided by the prior art
  • FIG. 2 is a schematic structural diagram of a quantum dot backlight module according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a structure of a light guide plate according to an embodiment of the present invention.
  • FIG. 4 is a top plan view of a structure of a light guide plate according to an embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing a structure of a light guide plate according to an embodiment of the present invention.
  • the display panel of the present invention may be, for example, a TFT-LCD (Thin Film Transistor Liquid) Crystal Display, thin film transistor liquid crystal display panel), AMOLED (Active Matrix Organic Light Emitting) Diode, active matrix OLED panel) and other display panels.
  • TFT-LCD Thin Film Transistor Liquid
  • AMOLED Active Matrix Organic Light Emitting Diode
  • active matrix OLED panel active matrix OLED panel
  • a dot dot enclosing a quantum dot is disposed on a surface of the light guide plate; a backlight light emitted from the LED is sequentially passed through the light guide plate and the mesh point, and then the light emitting diode is passed through the quantum dot.
  • the light emitted by the light source is converted into light of different wavelengths, and the quantum dot backlight module designed by the structure can effectively improve the utilization of the quantum dot material.
  • the present invention solves the problem that the quantum dot film is disposed above the light guide plate existing in the prior art, which brings about the problem that the quantum dot material cannot be effectively utilized, and the package is surrounded by a large problem in the process of fabricating the film. Poor packaging can lead to cadmium contamination, which is very harmful.
  • the quantum dot material itself is affected by the influence of oxygen and water in the air.
  • FIG. 2 is a schematic structural diagram of a quantum dot backlight module according to an embodiment of the present invention; for convenience of description, only parts related to the embodiment of the present invention are shown.
  • the quantum dot backlight module mainly includes: a light emitting diode 100, a reflective sheet 200, a light guide plate 300, a plurality of dots 400, and a quantum dot 500.
  • the light guide plate 300 is disposed above the reflective sheet 200.
  • the plurality of dots 400 are spaced apart from each other on the upper surface of the light guide plate 300.
  • the quantum dots 500 are encapsulated in the dots 400.
  • the light emitting diode 100 is disposed on a side of the light guide plate 300, wherein the quantum dot 500 is provided with a semiconductor quantum dot phosphor.
  • the light emitting diode 100 provides a light source for the light guide plate 300.
  • the backlight light emitted by the light emitting diode 100 passes through the light guide plate 300 and the dot 400, and then passes through the quantum dot.
  • the light emitted from the light source of the light emitting diode 100 is converted into light of different wavelengths, and the reflective sheet 200 is used to reflect the light exposed from the bottom surface back into the light guide plate 300 to improve the use efficiency of light.
  • the dot 400 can effectively condense the backlight light into a point light source, and then display through the quantum dot 500, thereby effectively realizing the utilization of the quantum dot material.
  • the quantum dot 500 is encapsulated in the halftone dot 400 instead of the quantum dot 500 disposed in the light emitting diode 100. Therefore, the heat dissipation problem of the light emitting diode 100 can be effectively solved.
  • the dot 400 has a columnar structure.
  • the structure of the dot 400 is a cylindrical structure as shown in FIG.
  • the structure of the dot 400 may also be a polygonal column structure or the like, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention.
  • the side surface of the mesh point 400 of the cylindrical structure is made of a reflective material
  • the upper surface of the mesh point 400 is made of silicone resin or PMMA (Polymethyl). Methacrylate, polymethyl methacrylate) is used to encapsulate the quantum dot 500.
  • the dot 400 is designed as a cylindrical structure, so that the light is more concentrated on the quantum dot 500, increasing the efficiency of the quantum dot 500; in addition, designing the dot 400 into a cylindrical structure is also advantageous for the quantum dot 500.
  • the package since the quantum dots 500 are encapsulated in the dots 400 of the cylindrical structure, the quantum dot material is not affected by the influence of oxygen and water in the air.
  • the light guide plate 300 includes opposite first and second sides, and the thickness of the first side of the light guide plate 300.
  • the first side of the light guide plate 300 is closer to the side of the light emitting diode 100 than the thickness of the second side.
  • the light guide plate 300 near the light emitting diode 100 has a thickness t1 and the other side has a thickness of t2.
  • the light guide plate 300 is designed as a wedge-shaped light guide plate structure having a uniform dot size but a t1 greater than t2.
  • the interval between the plurality of dots 400 is t/tan ⁇ c
  • ⁇ c is the critical angle (ie, the angle of incidence when the light is totally reflected in the light guide plate)
  • t is the thickness between the center of the bottom of the adjacent dot on the left side and the bottom of the light guide plate.
  • the light emitting diode 100 preferably uses a blue light emitting diode.
  • the light emitting diode 100 can also adopt other color light emitting diodes. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.
  • the quantum dot 500 can convert light emitted by a standard blue light emitting diode source into light of different wavelengths, the larger particle quantum dot 500 can illuminate long wavelength light (such as red light), while the smaller particle quantum dot 500 Converted to short-wavelength light (such as green light), these different particles mix to form a new spectrum.
  • the quantum dot 500 includes red quantum dots and green quantum dots.
  • the red quantum dots include red quantum dots of large particles and red quantum dots of small particles; the green quantum dots further include green quantum dots of large particles and green quantum dots of small particles.
  • each of the dots 400 is encapsulated with a plurality of red quantum dots of large particles and small particles, and a plurality of green quantum dots of large particles and small particles.
  • the quantum dot 500 can convert light emitted by a standard blue light emitting diode source into light of different wavelengths, the larger particle quantum dot 500 can illuminate long wavelength light (such as red light), and the smaller particle quantum dot 500 It is then converted to short-wavelength light (such as green light), which mix to form a new spectrum.
  • long wavelength light such as red light
  • short-wavelength light such as green light
  • the quantum dot backlight module further includes: a diffusion sheet 600 disposed above the light guide plate 300.
  • the diffusion sheet 600 can improve the uniform diffusion effect of the backlight light distribution, and can improve the light transmittance to generate high brightness.
  • the quantum dot backlight module further includes an optical film 700 disposed above the diffusion sheet 600.
  • the optical film 700 can be a prism, a diffusion film, or the like; the optical film 700 has the function of improving the optical performance of the quantum dot backlight module.
  • the above quantum dot backlight module is an edge-lit backlight mode.
  • the quantum dot backlight module provides backlight to the display device.
  • the embodiment of the present invention further provides a display device.
  • the display device includes a display panel and a quantum dot backlight module, and the display panel is disposed relative to the quantum dot backlight module.
  • the display panel of the present invention may be, for example, a TFT-LCD (Thin Film Transistor Liquid Crystal Display, thin film transistor liquid crystal display panel), AMOLED (Active Matrix Organic Light Emitting Diode, active matrix OLED panel) and other display panels.
  • the display panel is composed of two transparent substrates and a liquid crystal sealed between the substrates, and the display panel has a plurality of pixels for displaying images.
  • the structure of the quantum dot backlight module will be described in detail below.
  • FIG. 2 is a schematic structural diagram of a quantum dot backlight module according to an embodiment of the present invention; for convenience of description, only parts related to the embodiment of the present invention are shown.
  • the quantum dot backlight module mainly includes: a light emitting diode 100, a reflective sheet 200, a light guide plate 300, a plurality of dots 400, and a quantum dot 500.
  • the light guide plate 300 is disposed above the reflective sheet 200.
  • the plurality of dots 400 are spaced apart from each other on the upper surface of the light guide plate 300.
  • the quantum dots 500 are encapsulated in the dots 400.
  • the light emitting diode 100 is disposed on a side of the light guide plate 300, wherein the quantum dot 500 is provided with a semiconductor quantum dot phosphor.
  • the light emitting diode 100 provides a light source for the light guide plate 300.
  • the backlight light emitted by the light emitting diode 100 passes through the light guide plate 300 and the dot 400, and then passes through the quantum dot.
  • the light emitted from the light source of the light emitting diode 100 is converted into light of different wavelengths, and the reflective sheet 200 is used to reflect the light exposed from the bottom surface back into the light guide plate 300 to improve the use efficiency of light.
  • the dot 400 can effectively condense the backlight light into a point light source, and then display through the quantum dot 500, thereby effectively realizing the utilization of the quantum dot material.
  • the quantum dot 500 is encapsulated in the halftone dot 400 instead of the quantum dot 500 disposed in the light emitting diode 100. Therefore, the heat dissipation problem of the light emitting diode 100 can be effectively solved.
  • the dot 400 has a columnar structure.
  • the structure of the dot 400 is a cylindrical structure as shown in FIG.
  • the structure of the dot 400 may also be a polygonal column structure or the like, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention.
  • the side surface of the dot 400 of the cylindrical structure is made of a reflective material
  • the upper surface of the dot 400 is made of silicone or PMMA to encapsulate the quantum dot 500, and light is emitted from the light guide plate.
  • the dot 400 is designed as a cylindrical structure, so that the light is more concentrated on the quantum dot 500, increasing the efficiency of the quantum dot 500; in addition, designing the dot 400 into a cylindrical structure is also advantageous for the quantum dot 500.
  • the package since the quantum dots 500 are encapsulated in the dots 400 of the cylindrical structure, the quantum dot material is not affected by the influence of oxygen and water in the air.
  • the light guide plate 300 includes opposite first and second sides, and the thickness of the first side of the light guide plate 300.
  • the first side of the light guide plate 300 is closer to the side of the light emitting diode 100 than the thickness of the second side.
  • the light guide plate 300 near the light emitting diode 100 has a thickness t1 and the other side has a thickness of t2.
  • the light guide plate 300 is designed as a wedge-shaped light guide plate structure having a uniform dot size but a t1 greater than t2.
  • the interval between the plurality of dots 400 is t/tan ⁇ c
  • ⁇ c is the critical angle (ie, the angle of incidence when the light is totally reflected in the light guide plate)
  • t is the thickness between the center of the bottom of the adjacent dot on the left side and the bottom of the light guide plate.
  • the light emitting diode 100 preferably uses a blue light emitting diode.
  • the light emitting diode 100 can also adopt other color light emitting diodes. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.
  • the quantum dot 500 can convert light emitted by a standard blue light emitting diode source into light of different wavelengths, the larger particle quantum dot 500 can illuminate long wavelength light (such as red light), while the smaller particle quantum dot 500 Converted to short-wavelength light (such as green light), these different particles mix to form a new spectrum.
  • the quantum dot 500 includes red quantum dots and green quantum dots.
  • the red quantum dots include red quantum dots of large particles and red quantum dots of small particles; the green quantum dots further include green quantum dots of large particles and green quantum dots of small particles.
  • each of the dots 400 is encapsulated with a plurality of red quantum dots of large particles and small particles, and a plurality of green quantum dots of large particles and small particles.
  • the quantum dot 500 can convert light emitted by a standard blue light emitting diode source into light of different wavelengths, the larger particle quantum dot 500 can illuminate long wavelength light (such as red light), and the smaller particle quantum dot 500 It is then converted to short-wavelength light (such as green light), which mix to form a new spectrum.
  • long wavelength light such as red light
  • short-wavelength light such as green light
  • the quantum dot backlight module further includes: a diffusion sheet 600 disposed above the light guide plate 300.
  • the diffusion sheet 600 can improve the uniform diffusion effect of the backlight light distribution, and can improve the light transmittance to generate high brightness.
  • the quantum dot backlight module further includes an optical film 700 disposed above the diffusion sheet 600.
  • the optical film 700 can be a prism, a diffusion film, or the like; the optical film 700 has the function of improving the optical performance of the quantum dot backlight module.
  • the above quantum dot backlight module is an edge-lit backlight mode.
  • the quantum dot backlight module provides backlight to the display device.
  • the display device can be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a dot arranged with a quantum dot is disposed on a surface of the light guide plate; and a backlight light emitted from the LED passes through the light guide plate and the dot, and then the quantum dot is used to The light emitted by the LED light source is converted into light of different wavelengths, and the quantum dot backlight module designed by the structure can effectively improve the utilization of the quantum dot material.
  • the present invention solves the problem that the quantum dot film is disposed above the light guide plate existing in the prior art, which brings about the problem that the quantum dot material cannot be effectively utilized, and the package is surrounded by a large problem in the process of fabricating the film. Poor packaging can lead to cadmium contamination, which is very harmful.
  • the quantum dot material itself is affected by the influence of oxygen and water in the air.

Abstract

量子点背光模组及包括量子点背光模组的显示装置。量子点背光模组包括：反射片（200），设置于反射片（200）上方的导光板（300），设置于导光板（300）上表面的多个网点（400），多个网点（400）间隔设置在导光板（300）上表面，设置于网点（400）内的量子点（500），以及设置于导光板（300）侧边的发光二极管（100）。背光模组提高量子点材料的利用率，降低了成本，达到使发光二极管（100）有效散热和实现广色域的目的。

Description

一种量子点背光模组以及显示装置 技术领域
本发明涉及显示技术领域，特别涉及一种量子点背光模组以及显示装置。
 背景技术
半导体量子点荧光粉是一种新型的白光LED(Light Emitting Diode，发光二极管)发光材料，其颗粒是一种比水分子大、比病毒小的微粒，基于它们自身颗粒尺寸的大小可以将由标准蓝光发光二极管光源发出的光转换成不同波长的光，较大的颗粒可激射出长波长光(如红光)，而较小的颗粒则转换为短波长光(如绿光)，这些不同微粒混合后形成一个新的光谱。利用这种量子点特性，可以制备量子点增强薄膜(Quantum Dot Enhanced Film，简称QDEF)，以利用标准蓝光LED 光源来实现高品质三原色白光，使液晶显示(Liquid crystal display，简称LCD) 的显示性能达到新的水平。与传统的白光LED 荧光发光材料相比，量子点荧光粉具有宽吸收窄发射、发光效率更高、使用寿命长、显色性更高，以及颜色的纯度更好等优势，因此，采用量子点发光材料的显示设备具有很高的色域，以及较高的显示品质。
在现有技术中，通常将量子点增强薄膜应用在背光模组中，如图1 所示，背光模组主要包括：蓝色发光二极管10、反射片20、设置在反射片20上侧的导光板30、设置在所述导光板30上侧的量子点薄膜40和位于量子点薄膜40上侧的光学膜片50，蓝色发光二极管10设置于所述导光板30左侧。量子点薄膜40可实现蓝色发光二极管10发出的光转化为红色和绿色。根据能量转化的原理，没有外界能的参与下，只有高能级向低能级转化，所以将蓝色发光二极管10发出的蓝光转化为红光和绿光，实现显示器的三基色显示。如果将量子点薄膜40设置在蓝色发光二极管10中，则会出现蓝色发光二极管10光源无法散热的问题；为解决散热问题，目前，将量子点薄膜40设置在导光板30的上方，虽然可有效的解决散热的问题，以及可实现蓝光到红光及绿光波长的有效转换，但是量子点薄膜40的大小便要和液晶显示面板的大小一样，所以会带来量子点材料不能有效利用的问题。而且由于量子点材料多为含镉材料，具有毒性，在制作薄膜的过程中在四周封装是很大问题，封装不好则会导致镉污染，危害很大。另外，量子点材料本身会受空气中的氧和水的影响而使其失效。
故，有必要提出一种新的技术方案，以解决上述技术问题。
 技术问题
本发明的目的在于提供一种量子点背光模组以及显示装置，旨在解决现有技术中存在的将量子点薄膜设置在导光板的上方，会带来量子点材料不能有效利用的问题，以及在制作薄膜的过程中在四周封装是很大问题，封装不好则会导致镉污染，危害很大；另外，量子点材料本身会受空气中的氧和水的影响而使其失效的问题。
 技术解决方案
一种量子点背光模组，其中所述量子点背光模组包括：发光二极管、反射片、导光板、多个网点、以及量子点；所述导光板设置于所述反射片上方，所述多个网点之间间隔设置于所述导光板上表面，所述量子点封装于所述网点内，所述发光二极管设置于所述导光板侧边，其中所述量子点内设置有半导体量子点荧光粉；所述网点为圆柱形结构；
其中，所述导光板包括相对设置的第一侧边和第二侧边，所述导光板的所述第一侧边的厚度大于所述第二侧边的厚度，其中，所述导光板的所述第一侧边为靠近所述发光二极管的侧边；
其中，所述发光二极管为所述导光板提供光源，所述发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去。
优选的，其中所述多个网点之间的间隔为t/tanθc ；其中，θc是光线在所述导光板中发生全反射时的入射角，t是左侧相邻网点底部中心到所述导光板底部之间的厚度。
优选的，其中所述量子点背光模组还包括：设置于所述导光板上方的扩散片。
优选的，其中所述量子点背光模组还包括：设置于所述扩散片上方的光学膜片。
优选的，其中所述发光二极管为蓝色发光二极管。
优选的，其中所述量子点包括红色量子点和绿色量子点。
优选的，其中所述圆柱形结构的网点的侧表面采用反射型材质制成。
优选的，其中所述红色量子点包括大颗粒的红色量子点和小颗粒的红色量子点。
优选的，其中所述绿色量子点包括大颗粒的绿色量子点和小颗粒的绿色量子点。
优选的，其中所述光学膜片为棱镜或扩散膜。
一种量子点背光模组，所述量子点背光模组包括：发光二极管、反射片、导光板、多个网点、以及量子点；所述导光板设置于所述反射片上方，所述多个网点之间间隔设置于所述导光板上表面，所述量子点封装于所述网点内，所述发光二极管设置于所述导光板侧边，其中所述量子点内设置有半导体量子点荧光粉；
其中，所述发光二极管为所述导光板提供光源，所述发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去。
优选的，所述网点为圆柱形结构。
优选的，所述导光板包括相对设置的第一侧边和第二侧边，所述导光板的所述第一侧边的厚度大于所述第二侧边的厚度，其中，所述导光板的所述第一侧边为靠近所述发光二极管的侧边。
优选的，所述多个网点之间的间隔为t/tanθc ；其中θc是光线在所述导光板中发生全反射时的入射角，t是左侧相邻网点底部中心到所述导光板底部之间的厚度。
优选的，所述量子点背光模组还包括：设置于所述导光板上方的扩散片。
优选的，所述量子点背光模组还包括：设置于所述扩散片上方的光学膜片。
优选的，所述发光二极管为蓝色发光二极管。
优选的，所述量子点包括红色量子点和绿色量子点。
优选的，所述圆柱形结构的网点的侧表面采用反射型材质制成。
一种显示装置，所述显示装置包括显示面板及量子点背光模组，所述显示面板相对于所述量子点背光模组来设置；其中，所述量子点背光模组包括：发光二极管、反射片、导光板、多个网点、以及量子点；所述导光板设置于所述反射片上方，所述多个网点之间间隔设置于所述导光板上表面，所述量子点封装于所述网点内，所述发光二极管设置于所述导光板侧边，其中所述量子点内设置有半导体量子点荧光粉；
其中，所述发光二极管为所述导光板提供光源，所述发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去。
 有益效果
相对现有技术，本发明通过在导光板上表面设置封装有量子点的网点；发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去，该结构设计的量子点背光模组，可有效地提高量子点材料的利用率，由于采用间隔设置网点且将量子点封装在网点内，因此无需一整片的量子点膜片，进而达到节省量子点材料的使用，降低了成本，并且可达到使发光二极管有效散热和实现广色域的目的。
 附图说明
图1为现有技术提供的背光模组的结构示意图；
图2为本发明实施例提供的量子点背光模组的结构示意图；
图3为本发明实施例提供的导光板结构的示意图；
图4为本发明实施例提供的导光板结构的俯视图；
图5为本发明实施例提供的导光板结构的截面图。
 本发明的最佳实施方式
本说明书所使用的词语“实施例”意指用作实例、示例或例证。此外，本说明书和所附权利要求中所使用的冠词“一”一般地可以被解释为意指“一个或多个”，除非另外指定或从上下文清楚导向单数形式。
本发明的显示面板可以是诸如TFT-LCD（Thin Film Transistor Liquid Crystal Display，薄膜晶体管液晶显示面板）、AMOLED（Active Matrix Organic Light Emitting Diode，有源矩阵有机发光二极管面板）等显示面板。
在本发明实施例中，通过在导光板上表面设置封装有量子点的网点；发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去，该结构设计的量子点背光模组，可有效地提高量子点材料的利用率，由于采用间隔设置网点且将量子点封装在网点内，因此无需一整片的量子点膜片，进而达到节省量子点材料的使用，降低了成本，并且可达到使发光二极管有效散热和实现广色域的目的。因此，本发明解决了现有技术中存在的将量子点薄膜设置在导光板的上方，会带来量子点材料不能有效利用的问题，以及在制作薄膜的过程中在四周封装是很大问题，封装不好则会导致镉污染，危害很大；另外，量子点材料本身会受空气中的氧和水的影响而使其失效的问题。
为了说明本发明所述的技术方案，下面通过具体实施例来进行说明。
请参阅图2，为本发明实施例提供的量子点背光模组的结构示意图；为了便于说明，仅示出了与本发明实施例相关的部分。
所述量子点背光模组主要包括：发光二极管100、反射片200、导光板300、多个网点400、以及量子点500。其中，所述导光板300设置于所述反射片200上方，所述多个网点400之间间隔设置于所述导光板300上表面，所述量子点500封装于所述网点400内，所述发光二极管100设置于所述导光板300侧边，其中所述量子点500内设置有半导体量子点荧光粉。
在本发明实施例中，所述发光二极管100为所述导光板300提供光源，所述发光二极管100发出的背光光线依次经过所述导光板300和所述网点400后，再通过所述量子点500将所述发光二极管100光源发出的光转换成不同波长的光发射出去，所述反射片200用于将底面露出的光反射回所述导光板300中，以提高光的使用效率。所述网点400可使背光光线有效地聚为点光源，再通过所述量子点500进行显示，可有效的实现量子点材料的利用率。本实施例中，将所述量子点500封装于所述网点400内，而不是将所述量子点500设置在所述发光二极管100中，因此，能有效解决发光二极管100的散热问题。
作为本发明一优选实施例，所述网点400的结构为柱状形结构。优选的，所述网点400的结构为圆柱形结构，如图3所示。然而，可以理解的是，所述网点400的结构也可以为多边形柱状结构等，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。本实施例中，圆柱形结构的所述网点400的侧表面采用反射型材质制成，所述网点400的上表面是采用硅树脂或PMMA（Polymethyl Methacrylate，聚甲基丙烯酸甲酯）来封装所述量子点500，光线从所述导光板300基材取出后，经多重反射，最后大多集中于圆柱形结构的所述网点400上表面，再从所述网点400上表面射出所述光线。将所述网点400设计成圆柱形结构，从而使得光更集中的打到量子点500上，增加量子点500的效率；另外，将所述网点400设计成圆柱形结构也有利于量子点500的封装，由于量子点500是封装于所述圆柱形结构的网点400内，因此，量子点材料不会受空气中的氧和水的影响而使其失效。
作为本发明另一优选实施例，请参阅图4和图5，所述导光板300包括相对设置的第一侧边和第二侧边，所述导光板300的所述第一侧边的厚度大于所述第二侧边的厚度，其中，所述导光板300的所述第一侧边为靠近所述发光二极管100的侧边。例如，靠近所述发光二极管100处的导光板300厚度为t1，另一边厚度为t2，为了简易网点封装过程，设计该导光板300为网点大小均一但t1大于t2的楔形导光板结构。进一步地，所述多个网点400之间的间隔为t/tanθc ，其中θc是临界角（即光线在所述导光板中发生全反射时的入射角），t是左侧相邻网点底部中心到所述导光板底部之间的厚度。红色和绿色量子点混合后封装于该圆柱型网点里，当光取出时会通过量子点500打到上方的光学膜片上。
在本发明实施例中，所述发光二极管100优选的采用蓝色发光二极管。然而，可以理解的是，所述发光二极管100也可以采用其他色的发光二极管。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。由于量子点500可以将由标准蓝色发光二极管光源发出的光转换成不同波长的光，较大颗粒的量子点500可激射出长波长光(如红光)，而较小颗粒的量子点500则转换为短波长光(如绿光)，这些不同微粒混合后形成一个新的光谱。以利用标准蓝色发光二极管光源来实现高品质三原色白光，使液晶显示(Liquid crystal display，简称LCD) 的显示性能达到新的水平。因此，本实施例优选采用蓝色发光二极管。
在本发明实施例中，所述量子点500包括红色量子点和绿色量子点。其中，红色量子点又包括大颗粒的红色量子点和小颗粒的红色量子点；绿色量子点又包括大颗粒的绿色量子点和小颗粒的绿色量子点。在本实施例中，每一个所述网点400内均封装有多个大颗粒和小颗粒的红色量子点以及多个大颗粒和小颗粒的绿色量子点。这样，量子点500可以将由标准蓝色发光二极管光源发出的光转换成不同波长的光，较大颗粒的量子点500可激射出长波长光(如红光)，而较小颗粒的量子点500则转换为短波长光(如绿光)，这些不同微粒混合后形成一个新的光谱。
作为本发明另一优选实施例，所述量子点背光模组还包括：一扩散片600，所述扩散片600设置于所述导光板300上方。所述扩散片600可提高背光光线分布均匀的扩散效果，并可提高光线透过率从而产生高亮度。
作为本发明再一优选实施例，所述量子点背光模组还包括：一光学膜片700，所述光学膜片700设置于所述扩散片600上方。其中，所述光学膜片700可以为棱镜、扩散膜等；所述光学膜片700具有提高量子点背光模组光学性能的作用。
然而，可以理解的是，上述量子点背光模组为侧光式背光模式。所述量子点背光模组以提供背光至显示装置。
本发明实施例还提供了一种显示装置，为了便于说明，仅示出了与本发明实施例相关的部分。所述显示装置包括显示面板及量子点背光模组，所述显示面板相对于所述量子点背光模组来设置。本发明的显示面板可以是诸如TFT-LCD（Thin Film Transistor Liquid Crystal Display，薄膜晶体管液晶显示面板）、AMOLED（Active Matrix Organic Light Emitting Diode，有源矩阵有机发光二极管面板）等显示面板。其中，所述显示面板是由两片透明基板以及被封于基板之间的液晶所构成，显示面板具有多个像素，用于显示影像。
下面详细描述所述量子点背光模组的结构。
请参阅图2，为本发明实施例提供的量子点背光模组的结构示意图；为了便于说明，仅示出了与本发明实施例相关的部分。
所述量子点背光模组主要包括：发光二极管100、反射片200、导光板300、多个网点400、以及量子点500。其中，所述导光板300设置于所述反射片200上方，所述多个网点400之间间隔设置于所述导光板300上表面，所述量子点500封装于所述网点400内，所述发光二极管100设置于所述导光板300侧边，其中所述量子点500内设置有半导体量子点荧光粉。
在本发明实施例中，所述发光二极管100为所述导光板300提供光源，所述发光二极管100发出的背光光线依次经过所述导光板300和所述网点400后，再通过所述量子点500将所述发光二极管100光源发出的光转换成不同波长的光发射出去，所述反射片200用于将底面露出的光反射回所述导光板300中，以提高光的使用效率。所述网点400可使背光光线有效地聚为点光源，再通过所述量子点500进行显示，可有效的实现量子点材料的利用率。本实施例中，将所述量子点500封装于所述网点400内，而不是将所述量子点500设置在所述发光二极管100中，因此，能有效解决发光二极管100的散热问题。
作为本发明一优选实施例，所述网点400的结构为柱状形结构。优选的，所述网点400的结构为圆柱形结构，如图3所示。然而，可以理解的是，所述网点400的结构也可以为多边形柱状结构等，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。本实施例中，圆柱形结构的所述网点400的侧表面采用反射型材质制成，所述网点400的上表面是采用硅树脂或PMMA来封装所述量子点500，光线从所述导光板300基材取出后，经多重反射，最后大多集中于圆柱形结构的所述网点400上表面，再从所述网点400上表面射出所述光线。将所述网点400设计成圆柱形结构，从而使得光更集中的打到量子点500上，增加量子点500的效率；另外，将所述网点400设计成圆柱形结构也有利于量子点500的封装，由于量子点500是封装于所述圆柱形结构的网点400内，因此，量子点材料不会受空气中的氧和水的影响而使其失效。
作为本发明另一优选实施例，请参阅图4和图5，所述导光板300包括相对设置的第一侧边和第二侧边，所述导光板300的所述第一侧边的厚度大于所述第二侧边的厚度，其中，所述导光板300的所述第一侧边为靠近所述发光二极管100的侧边。例如，靠近所述发光二极管100处的导光板300厚度为t1，另一边厚度为t2，为了简易网点封装过程，设计该导光板300为网点大小均一但t1大于t2的楔形导光板结构。进一步地，所述多个网点400之间的间隔为t/tanθc ，其中θc是临界角（即光线在所述导光板中发生全反射时的入射角），t是左侧相邻网点底部中心到所述导光板底部之间的厚度。红色和绿色量子点混合后封装于该圆柱型网点里，当光取出时会通过量子点500打到上方的光学膜片上。
在本发明实施例中，所述发光二极管100优选的采用蓝色发光二极管。然而，可以理解的是，所述发光二极管100也可以采用其他色的发光二极管。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。由于量子点500可以将由标准蓝色发光二极管光源发出的光转换成不同波长的光，较大颗粒的量子点500可激射出长波长光(如红光)，而较小颗粒的量子点500则转换为短波长光(如绿光)，这些不同微粒混合后形成一个新的光谱。以利用标准蓝色发光二极管光源来实现高品质三原色白光，使液晶显示(Liquid crystal display，简称LCD) 的显示性能达到新的水平。因此，本实施例优选采用蓝色发光二极管。
在本发明实施例中，所述量子点500包括红色量子点和绿色量子点。其中，红色量子点又包括大颗粒的红色量子点和小颗粒的红色量子点；绿色量子点又包括大颗粒的绿色量子点和小颗粒的绿色量子点。在本实施例中，每一个所述网点400内均封装有多个大颗粒和小颗粒的红色量子点以及多个大颗粒和小颗粒的绿色量子点。这样，量子点500可以将由标准蓝色发光二极管光源发出的光转换成不同波长的光，较大颗粒的量子点500可激射出长波长光(如红光)，而较小颗粒的量子点500则转换为短波长光(如绿光)，这些不同微粒混合后形成一个新的光谱。
作为本发明另一优选实施例，所述量子点背光模组还包括：一扩散片600，所述扩散片600设置于所述导光板300上方。所述扩散片600可提高背光光线分布均匀的扩散效果，并可提高光线透过率从而产生高亮度。
作为本发明再一优选实施例，所述量子点背光模组还包括：一光学膜片700，所述光学膜片700设置于所述扩散片600上方。其中，所述光学膜片700可以为棱镜、扩散膜等；所述光学膜片700具有提高量子点背光模组光学性能的作用。
然而，可以理解的是，上述量子点背光模组为侧光式背光模式。所述量子点背光模组以提供背光至显示装置。
然而，可以理解的是，所述显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
综上所述，本发明实施例通过在导光板上表面设置封装有量子点的网点；发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去，该结构设计的量子点背光模组，可有效地提高量子点材料的利用率，由于采用间隔设置网点且将量子点封装在网点内，因此无需一整片的量子点膜片，进而达到节省量子点材料的使用，降低了成本，并且可达到使发光二极管有效散热和实现广色域的目的。因此，本发明解决了现有技术中存在的将量子点薄膜设置在导光板的上方，会带来量子点材料不能有效利用的问题，以及在制作薄膜的过程中在四周封装是很大问题，封装不好则会导致镉污染，危害很大；另外，量子点材料本身会受空气中的氧和水的影响而使其失效的问题。
尽管已经相对于一个或多个实现方式示出并描述了本发明，但是本领域技术人员基于对本说明书和附图的阅读和理解将会想到等价变型和修改。本发明包括所有这样的修改和变型，并且仅由所附权利要求的范围限制。特别地关于由上述组件执行的各种功能，用于描述这样的组件的术语旨在对应于执行所述组件的指定功能（例如其在功能上是等价的）的任意组件（除非另外指示），即使在结构上与执行本文所示的本说明书的示范性实现方式中的功能的公开结构不等同。此外，尽管本说明书的特定特征已经相对于若干实现方式中的仅一个被公开，但是这种特征可以与如可以对给定或特定应用而言是期望和有利的其他实现方式的一个或多个其他特征组合。而且，就术语“包括”、“具有”、“含有”或其变形被用在具体实施方式或权利要求中而言，这样的术语旨在以与术语“包含”相似的方式包括。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种量子点背光模组，其中所述量子点背光模组包括：发光二极管、反射片、导光板、多个网点、以及量子点；所述导光板设置于所述反射片上方，所述多个网点之间间隔设置于所述导光板上表面，所述量子点封装于所述网点内，所述发光二极管设置于所述导光板侧边，其中所述量子点内设置有半导体量子点荧光粉；所述网点为圆柱形结构；
    其中，所述导光板包括相对设置的第一侧边和第二侧边，所述导光板的所述第一侧边的厚度大于所述第二侧边的厚度，其中，所述导光板的所述第一侧边为靠近所述发光二极管的侧边；
    其中，所述发光二极管为所述导光板提供光源，所述发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去。
  2. 根据权利要求1所述的量子点背光模组，其中所述多个网点之间的间隔为t/tanθc ；其中，θc是光线在所述导光板中发生全反射时的入射角，t是左侧相邻网点底部中心到所述导光板底部之间的厚度。
  3. 根据权利要求1所述的量子点背光模组，其中所述量子点背光模组还包括：设置于所述导光板上方的扩散片。
  4. 根据权利要求3所述的量子点背光模组，其中所述量子点背光模组还包括：设置于所述扩散片上方的光学膜片。
  5. 根据权利要求1所述的量子点背光模组，其中所述发光二极管为蓝色发光二极管。
  6. 根据权利要求1所述的量子点背光模组，其中所述量子点包括红色量子点和绿色量子点。
  7. 根据权利要求1所述的量子点背光模组，其中所述圆柱形结构的网点的侧表面采用反射型材质制成。
  8. 根据权利要求6所述的量子点背光模组，其中所述红色量子点包括大颗粒的红色量子点和小颗粒的红色量子点。
  9. 根据权利要求6所述的量子点背光模组，其中所述绿色量子点包括大颗粒的绿色量子点和小颗粒的绿色量子点。
  10. 根据权利要求4所述的量子点背光模组，其中所述光学膜片为棱镜或扩散膜。
  11. 一种量子点背光模组，其中所述量子点背光模组包括：发光二极管、反射片、导光板、多个网点、以及量子点；所述导光板设置于所述反射片上方，所述多个网点之间间隔设置于所述导光板上表面，所述量子点封装于所述网点内，所述发光二极管设置于所述导光板侧边，其中所述量子点内设置有半导体量子点荧光粉；
    其中，所述发光二极管为所述导光板提供光源，所述发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去。
  12. 根据权利要求11所述的量子点背光模组，其中所述网点为圆柱形结构。
  13. 根据权利要求11所述的量子点背光模组，其中所述导光板包括相对设置的第一侧边和第二侧边，所述导光板的所述第一侧边的厚度大于所述第二侧边的厚度，其中，所述导光板的所述第一侧边为靠近所述发光二极管的侧边。
  14. 根据权利要求11所述的量子点背光模组，其中所述多个网点之间的间隔为t/tanθc ；其中，θc是光线在所述导光板中发生全反射时的入射角，t是左侧相邻网点底部中心到所述导光板底部之间的厚度。
  15. 根据权利要求11所述的量子点背光模组，其中所述量子点背光模组还包括：设置于所述导光板上方的扩散片。
  16. 根据权利要求15所述的量子点背光模组，其中所述量子点背光模组还包括：设置于所述扩散片上方的光学膜片。
  17. 根据权利要求11所述的量子点背光模组，其中所述发光二极管为蓝色发光二极管。
  18. 根据权利要求11所述的量子点背光模组，其中所述量子点包括红色量子点和绿色量子点。
  19. 根据权利要求12所述的量子点背光模组，其中所述圆柱形结构的网点的侧表面采用反射型材质制成。
  20. 一种显示装置，其中所述显示装置包括显示面板及量子点背光模组，所述显示面板相对于所述量子点背光模组来设置；其中，所述量子点背光模组包括：发光二极管、反射片、导光板、多个网点、以及量子点；所述导光板设置于所述反射片上方，所述多个网点之间间隔设置于所述导光板上表面，所述量子点封装于所述网点内，所述发光二极管设置于所述导光板侧边，其中所述量子点内设置有半导体量子点荧光粉；
    其中，所述发光二极管为所述导光板提供光源，所述发光二极管发出的背光光线依次经过所述导光板和所述网点后，再通过所述量子点将所述发光二极管光源发出的光转换成不同波长的光发射出去。
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