CN108775541B - Novel quantum dot light guide plate backlight module structure and preparation method thereof - Google Patents
Novel quantum dot light guide plate backlight module structure and preparation method thereof Download PDFInfo
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- CN108775541B CN108775541B CN201810657100.XA CN201810657100A CN108775541B CN 108775541 B CN108775541 B CN 108775541B CN 201810657100 A CN201810657100 A CN 201810657100A CN 108775541 B CN108775541 B CN 108775541B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S10/00—Lighting devices or systems producing a varying lighting effect
- F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
- F21S10/023—Lighting devices or systems producing a varying lighting effect changing colors by selectively switching fixed light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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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
- G02F1/133553—Reflecting elements
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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Abstract
The invention relates to a novel quantum dot body light guide plate backlight module structure and a preparation method thereof, wherein the novel quantum dot body light guide plate backlight module structure comprises a blue light LED light source, a wedge-shaped quantum dot body light guide plate and a reflector plate; red quantum dots, green quantum dots and a high polymer material are dispersedly arranged in the wedge-shaped quantum dot body light guide plate, and one end of the wedge-shaped quantum dot body light guide plate, which is provided with a wedge angle, is close to the blue light LED light source; the reflector plate is provided with a yellow fluorescent powder layer; the yellow fluorescent powder layer is provided with a yellow fluorescent powder dot matrix, the diameter of the yellow fluorescent powder dot matrix is large and the arrangement is tight at the position close to the blue light LED light source, and the diameter of the yellow fluorescent powder dot matrix is small and the arrangement is sparse at the position far away from the blue light LED light source. The backlight module of the invention enables the quantum dots to be uniformly dispersed in the light guide plate material in the forming process, enables the quantum dots and the light guide plate to be integrated, reduces the number of independent quantum dot membrane layers, and has the advantages of complete function, simplified structure, simple process and reduced cost.
Description
Technical Field
The invention relates to a novel quantum dot light guide plate backlight module structure and a preparation method thereof.
Background
As a novel display material, quantum dots arouse interest of people due to excellent characteristics such as narrow half-peak width, high color purity, adjustable luminescent color, high quantum yield, high color gamut and the like, and are widely applied to the fields of display, illumination, biomedicine, solar photovoltaic and the like. At present, there are three main applications of quantum dots in the display field: quantum dot tube, quantum dot emitting diode, quantum dot diaphragm.
The quantum dot tube is formed by sealing red and green quantum dot-containing glue in a glass tube, and the glass tube is easy to break, and the quantum tube has high adaptability requirement on the backlight module. The quantum dot light emitting diode encapsulates quantum dots on an LED chip, the quantum dots work for a long time and easily cause fluorescence quenching under a high-temperature condition, and the temperature resistance of the quantum dots is a problem which needs to be solved urgently. The quantum dot film is a sandwich structure packaged by red and green quantum dots through a water-proof oxygen-proof film, the quantum dot consumption of the structure is huge, and the cost is huge in consideration of the barrier film with high water-proof oxygen-proof performance.
Chinese patent CN106883332A discloses a quantum dot doped PMMA bulk polymerization process, a light guide plate process and a light guide plate, wherein the quantum dot doped PMMA bulk polymerization process, the light guide plate process and the light guide plate are used for polymerizing quantum dots and MMA solution to form a PMMA light guide plate containing quantum dots. The disadvantage is that when the blue light enters the light guide plate, a part of the blue light is used for exciting the red and green quantum dots to emit light, a part of the blue light is scattered out, so that the blue light is more near the light source, while the blue light is less due to the lack of enough blue light to excite the red and green quantum dots in the middle and far away from the light source, and the light path diagram is as shown in figure 1, so that the brightness uniformity and the color uniformity of the whole light guide plate are very poor. Therefore, a new structure is needed to solve this problem.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a novel backlight module structure of a quantum dot light guide plate and a method for manufacturing the same, so as to solve the problem of reducing the amount of quantum dots and the cost while the color deviation of the quantum dot light guide plate near the light source and the color deviation of the quantum dot light guide plate far from the light source are reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a novel quantum dot body light guide plate backlight unit structure which characterized in that: the LED backlight module comprises a blue LED light source, a wedge-shaped quantum dot light guide plate and a reflector plate; red quantum dots, green quantum dots and a high polymer material are dispersedly arranged in the wedge-shaped quantum dot body light guide plate, and one end of the wedge-shaped quantum dot body light guide plate, which is provided with a wedge angle, is close to the blue light LED light source; the reflector plate is provided with a yellow fluorescent powder layer; the yellow fluorescent powder layer is provided with a yellow fluorescent powder dot matrix, the diameter of the yellow fluorescent powder dot matrix is large and the arrangement is tight at the position close to the blue light LED light source, and the diameter of the yellow fluorescent powder dot matrix is small and the arrangement is sparse at the position far away from the blue light LED light source. The arrangement method can effectively solve the problem that the color of the quantum dot body light guide plate close to the light source is blue and the color of the quantum dot body light guide plate far away from the light source is yellow.
Furthermore, the mass ratio of the red quantum dots to the green quantum dots in the wedge-shaped quantum dot body light guide plate is 1:10-1: 15; the quantum dots are
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And
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one or a mixture of more of group quantum dots, perovskite quantum dots and sulfur indium copper quantum dots, wherein the preferred alloy structure quantum dots have good temperature resistance.
Furthermore, red fluorescent powder and green fluorescent powder can be adopted to replace the red quantum dots and the green quantum dots in the wedge-shaped quantum dot body light guide plate; the mass ratio of the red fluorescent powder to the green fluorescent powder in the wedge-shaped quantum dot light guide plate is 1:7.5-1:16, the fluorescent powder is one or a mixture of several of fluosilicate fluorescent powder, fluotitanate fluorescent powder or oxynitride fluorescent powder, and the fluorescent powder with good temperature resistance is preferred.
Furthermore, the diameter of the yellow fluorescent powder dot matrix is 0.02-1mm, the height of the dot matrix is 0.01-0.5mm, and the distance between adjacent dot matrixes is 0.01-0.5 mm.
Further, the yellow fluorescent powder dot matrix can be realized through processes such as silk-screen printing, ink-jet printing and spraying.
Further, the polymer material includes a thermosetting polymer material and a thermoplastic polymer material. Examples of thermosetting polymer materials include epoxy resins, phenolics, polyimides, melamine-formaldehyde resins, etc., and examples of thermoplastic polymer materials include polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, etc.
Further, a preparation method of the novel quantum dot body light guide plate backlight module structure is characterized in that:
if the polymer material is a thermosetting polymer material, the specific steps include:
weighing red quantum dots and green quantum dots according to a proportion, dispersing the two quantum dots in an organic solvent, and adding the organic solvent mixed with the quantum dots into a prepolymer monomer to form a quantum dot monomer solution;
step two: adding a cross-linking agent into a quantum dot monomer solution, performing ultrasonic oscillation to fully dissolve the cross-linking agent, performing water bath reflux, controlling the temperature at 90 ℃ until viscous thin paste is formed, cooling the viscous thin paste to room temperature to obtain pre-polymerized quantum dot paste, and sealing and storing the pre-polymerized quantum dot paste for later use;
step three: injecting the prepolymerized raw stock into a mold, expelling bubbles and sealing a mold opening of the mold;
step four: carrying out low-temperature polymerization on the poured mould in an oven at 50 ℃, heating to 90 ℃ when the polymer in the mould is basically solid, and keeping for 2 hours to form a quantum dot polymer;
step five: and slowly cooling the quantum dot polymer and the mould to 40-50 ℃, and disassembling the mould to obtain the completely solidified wedge-shaped quantum dot body light guide plate.
Further, a preparation method of the novel quantum dot body light guide plate backlight module structure is characterized in that: if the polymer material is thermoplastic polymer material, the specific steps include:
the method comprises the following steps: putting the high polymer material into an oven at 70-80 ℃ for baking for 3-4 hours to remove the water in the high polymer material;
step two: weighing red and green quantum dots and a baked high molecular material according to a proportion, dispersing the quantum dots in an organic solvent, pouring a well dispersed quantum dot solution into the high molecular material, and fully and uniformly mixing to form a quantum dot high molecular mixture;
step three: putting the quantum dot high-molecular mixture into a feed inlet of an injection molding instrument for heating to form quantum dot high-molecular molten slurry;
step four: and injecting the quantum dot high-molecular melting slurry into a closed mould, cooling to 40-50 ℃ after the quantum dot high-molecular melting slurry is formed, opening the mould, and separating the quantum dot body light guide plate from the mould to obtain the completely solidified wedge-shaped quantum dot body light guide plate.
Compared with the prior art, the invention has the following beneficial effects:
the invention solves the problems of brightness uniformity and color uniformity of the light guide plate of the quantum dot body at the position close to the light source and the position far away from the light source, uniformly mixes the quantum dots in the light guide plate, is integrated with the light guide plate, replaces a quantum dot tube and a quantum dot membrane and further reduces the thickness of the backlight module. Meanwhile, the dosage of the quantum dots is further reduced under the same effect, and the production cost is greatly reduced.
Drawings
FIG. 1 is a structural light path diagram of a novel light guide plate with quantum dots according to the present invention;
fig. 2 is a distribution diagram of a yellow phosphor dot matrix on a reflector plate with yellow phosphor according to the present invention.
In the figure: the LED light source comprises a 1-blue light LED light source, a 2-wedge-shaped quantum dot body light guide plate, a 3-reflector plate, a 4-other optical membrane, 201-red quantum dots, 202-green quantum dots, 203-high polymer materials and 301-yellow fluorescent powder layer.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
Referring to fig. 1, the present invention provides a novel structure of a quantum dot light guide plate backlight module, which is characterized in that: the LED backlight module comprises a blue LED light source, a wedge-shaped quantum dot light guide plate and a reflector plate; red quantum dots, green quantum dots and a high polymer material are dispersedly arranged in the wedge-shaped quantum dot body light guide plate, and one end of the wedge-shaped quantum dot body light guide plate, which is provided with a wedge angle, is close to the blue light LED light source; the reflector plate is provided with a yellow fluorescent powder layer; the yellow fluorescent powder layer is provided with a yellow fluorescent powder dot matrix, the diameter of the yellow fluorescent powder dot matrix is large and the arrangement is tight at the position close to the blue light LED light source, and the diameter of the yellow fluorescent powder dot matrix is small and the arrangement is sparse at the position far away from the blue light LED light source. The arrangement method can effectively solve the problem that the color of the quantum dot body light guide plate close to the light source is blue and the color of the quantum dot body light guide plate far away from the light source is yellow.
In an embodiment of the invention, further, the mass ratio of the red quantum dots to the green quantum dots in the wedge-shaped quantum dot body light guide plate is 1:10-1: 15; the quantum dots are
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And
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group quantum dot, perovskite quantum dot, sulfur indium copper quantum dotOne or a mixture of more of the above, wherein the preferred one is an alloy structure quantum dot with good temperature resistance.
In an embodiment of the present invention, further, the wedge-shaped quantum dot light guide plate may further adopt red phosphor and green phosphor to replace the red quantum dots and the green quantum dots; the mass ratio of the red fluorescent powder to the green fluorescent powder in the wedge-shaped quantum dot light guide plate is 1:7.5-1:16, and the fluorescent powder is one or a mixture of several of fluosilicate fluorescent powder, fluotitanate fluorescent powder or oxynitride fluorescent powder.
In an embodiment of the invention, further, the yellow phosphor dot matrix has a diameter of 0.02-1mm, a height of 0.01-0.5mm, and a distance between adjacent dot matrices of 0.01-0.5 mm.
In an embodiment of the present invention, further, the yellow phosphor dot matrix may be implemented by screen printing, inkjet printing, spraying, or the like.
In an embodiment of the invention, further, the polymer material includes a thermosetting polymer material and a thermoplastic polymer material. Examples of thermosetting polymer materials include epoxy resins, phenolics, polyimides, melamine-formaldehyde resins, etc., and examples of thermoplastic polymer materials include polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, etc.
In an embodiment of the present invention, further, a method for manufacturing a novel quantum dot light guide plate backlight module structure is characterized in that:
if the polymer material is a thermosetting polymer material, the specific steps include:
weighing red quantum dots and green quantum dots according to a proportion, dispersing the two quantum dots in an organic solvent, and adding the organic solvent mixed with the quantum dots into a prepolymer monomer to form a quantum dot monomer solution;
step two: adding a cross-linking agent into a quantum dot monomer solution, performing ultrasonic oscillation to fully dissolve the cross-linking agent, performing water bath reflux, controlling the temperature at 90 ℃ until viscous thin paste is formed, cooling the viscous thin paste to room temperature to obtain pre-polymerized quantum dot paste, and sealing and storing the pre-polymerized quantum dot paste for later use;
step three: injecting the prepolymerized raw stock into a mold, expelling bubbles and sealing a mold opening of the mold;
step four: carrying out low-temperature polymerization on the poured mould in an oven at 50 ℃, heating to 90 ℃ when the polymer in the mould is basically solid, and keeping for 2 hours to form a quantum dot polymer;
step five: and slowly cooling the quantum dot polymer and the mould to 40-50 ℃, and disassembling the mould to obtain the completely solidified wedge-shaped quantum dot body light guide plate.
In an embodiment of the present invention, further, a method for manufacturing a novel quantum dot light guide plate backlight module structure is characterized in that: if the polymer material is thermoplastic polymer material, the specific steps include:
the method comprises the following steps: putting the high polymer material into an oven at 70-80 ℃ for baking for 3-4 hours to remove the water in the high polymer material;
step two: weighing red and green quantum dots and a baked high molecular material according to a proportion, dispersing the quantum dots in an organic solvent, pouring a well dispersed quantum dot solution into the high molecular material, and fully and uniformly mixing to form a quantum dot high molecular mixture;
step three: putting the quantum dot high-molecular mixture into a feed inlet of an injection molding instrument for heating to form quantum dot high-molecular molten slurry;
step four: and injecting the quantum dot high-molecular melting slurry into a closed mould, cooling to 40-50 ℃ after the quantum dot high-molecular melting slurry is formed, opening the mould, and separating the quantum dot body light guide plate from the mould to obtain the completely solidified wedge-shaped quantum dot body light guide plate.
In order to make the technical solution of the present invention better understood, the present invention will be described in detail with reference to the accompanying drawings.
Example 1
(1) Weighing a certain mass of styrene, weighing quantum dots with the weight of 0.15% of the weight of the styrene, wherein the ratio of the red quantum dots to the green quantum dots is 1:10, weighing n-hexane solvent with the weight of 0.6% of the weight of the styrene, and weighing benzoyl peroxide with the weight of 0.25% of the weight of the styrene.
(2) Dispersing the quantum dots in a normal hexane solvent, carrying out ultrasonic oscillation for 15 minutes to fully disperse the quantum dots in the solvent, adding styrene into the quantum dot solution, and fully stirring to uniformly disperse the quantum dots in the styrene to form a quantum dot monomer solution.
(3) Adding benzoyl peroxide into the quantum dot monomer solution prepared in the step 2, carrying out ultrasonic oscillation to fully dissolve the benzoyl peroxide, and carrying out water bath reflux and temperature control at 90 ℃ to carry out prepolymerization reaction. Observing the change of the solution every 5 minutes until the viscosity of the solution gradually rises to form viscous thin paste, cooling the solution to room temperature, sealing and storing.
(4) The cooled viscous grout is injected into a mold, the grouted mold is vertically placed to drive out air bubbles, and then the mold opening is packaged and sealed.
(5) And (3) carrying out low-temperature polymerization on the grouted mould in an oven at 50 ℃, and raising the temperature of the oven to 90 ℃ when the polymer in the mould is basically solid, and keeping the temperature for 2 hours.
(6) And cooling the mould to 50 ℃, disassembling the mould to obtain a sample plate of the completely solidified quantum dot body light guide plate, and cutting the sample plate to obtain the quantum dot body light guide plate 2.
Example 2
(1) And putting the ABS master batch into an oven at 70-80 ℃ for baking for 3 hours to remove the water in the ABS master batch.
(2) Weighing 500g of baked ABS master batch, 1mg of red quantum dot and 12mg of green quantum dot, and weighing n-hexane solvent accounting for 1.4% of the weight of the ABS.
(3) Dispersing the quantum dots in a normal hexane solvent, performing ultrasonic oscillation for 15 minutes to fully disperse the quantum dots in the solvent, pouring the well dispersed quantum dot solution into the ABS master batch, and fully and uniformly mixing to form the quantum dot ABS mixture.
(4) And putting the mixed quantum dot ABS mixture into a feed inlet of an injection molding instrument for heating to form quantum dot ABS molten slurry.
(5) And injecting the quantum dot ABS molten slurry into a closed mould, cooling to 40 ℃ after the quantum dot ABS molten slurry is formed, opening the mould, separating the quantum dot body light guide plate from the mould to obtain a completely solidified quantum dot body light guide plate sample plate, and cutting the sample plate to obtain the quantum dot body light guide plate 2.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (7)
1. The utility model provides a novel quantum dot body light guide plate backlight unit structure which characterized in that: the LED backlight module comprises a blue LED light source, a wedge-shaped quantum dot light guide plate and a reflector plate; red quantum dots, green quantum dots and a high polymer material are dispersedly arranged in the wedge-shaped quantum dot body light guide plate, and one end of the wedge-shaped quantum dot body light guide plate, which is provided with a wedge angle, is close to the blue light LED light source; the reflector plate is provided with a yellow fluorescent powder layer; the yellow fluorescent powder layer is provided with a yellow fluorescent powder dot matrix, the diameter of the yellow fluorescent powder dot matrix is large and the arrangement is tight at the position close to the blue LED light source, the diameter of the yellow fluorescent powder dot matrix is small and the arrangement is sparse at the position far away from the blue LED light source, and the mass ratio of red quantum dots to green quantum dots in the wedge-shaped quantum dot body light guide plate is 1:10-1: 15; the diameter of the yellow fluorescent powder dot matrix is 0.02-1mm, the height of the dot matrix is 0.01-0.5mm, and the distance between adjacent dot matrixes is 0.01-0.5 mm.
2. The novel quantum dot light guide plate backlight module structure of claim 1, wherein: the quantum dots are one or a mixture of more of II-IV and III-V group quantum dots, perovskite quantum dots and sulfur indium copper quantum dots.
3. The novel quantum dot light guide plate backlight module structure of claim 1, wherein: the wedge-shaped quantum dot light guide plate can also adopt red fluorescent powder and green fluorescent powder to replace the red quantum dots and the green quantum dots.
4. The novel quantum dot light guide plate backlight module structure of claim 3, wherein: the mass ratio of the red fluorescent powder to the green fluorescent powder in the wedge-shaped quantum dot light guide plate is 1:7.5-1:16, and the fluorescent powder is one or a mixture of several of fluosilicate fluorescent powder, fluotitanate fluorescent powder or oxynitride fluorescent powder.
5. The novel quantum dot light guide plate backlight module structure of claim 1, wherein: the high polymer material is a thermosetting high polymer material or a thermoplastic high polymer material.
6. The method for preparing a novel quantum dot light guide plate backlight module structure according to claim 5, wherein the method comprises the following steps: if the polymer material is a thermosetting polymer material, the specific steps include:
weighing red quantum dots and green quantum dots according to a proportion, dispersing the two quantum dots in an organic solvent, and adding the organic solvent mixed with the quantum dots into a prepolymer monomer to form a quantum dot monomer solution;
step two: adding a cross-linking agent into a quantum dot monomer solution, performing ultrasonic oscillation to fully dissolve the cross-linking agent, performing water bath reflux, controlling the temperature at 90 ℃ until viscous thin paste is formed, cooling the viscous thin paste to room temperature to obtain pre-polymerized quantum dot paste, and sealing and storing the pre-polymerized quantum dot paste for later use;
step three: injecting the prepolymerized raw stock into a mold, expelling bubbles and sealing a mold opening of the mold;
step four: carrying out low-temperature polymerization on the poured mould in an oven at 50 ℃, heating to 90 ℃ when the polymer in the mould is basically solid, and keeping for 2 hours to form a quantum dot polymer;
step five: and slowly cooling the quantum dot polymer and the mould to 40-50 ℃, and disassembling the mould to obtain the completely solidified wedge-shaped quantum dot body light guide plate.
7. The method for preparing a novel quantum dot light guide plate backlight module structure according to claim 5, wherein the method comprises the following steps: if the polymer material is thermoplastic polymer material, the specific steps include:
the method comprises the following steps: putting the high polymer material into an oven at 70-80 ℃ for baking for 3-4 hours to remove the water in the high polymer material;
step two: weighing red and green quantum dots and a baked high molecular material according to a proportion, dispersing the quantum dots in an organic solvent, pouring a well dispersed quantum dot solution into the high molecular material, and fully and uniformly mixing to form a quantum dot high molecular mixture;
step three: putting the quantum dot high-molecular mixture into a feed inlet of an injection molding instrument for heating to form quantum dot high-molecular molten slurry;
step four: and injecting the quantum dot high-molecular melting slurry into a closed mould, cooling to 40-50 ℃ after the quantum dot high-molecular melting slurry is formed, opening the mould, and separating the quantum dot body light guide plate from the mould to obtain the completely solidified wedge-shaped quantum dot body light guide plate.
Priority Applications (1)
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| CN112795031A (en) * | 2021-02-03 | 2021-05-14 | 青岛国骐光电科技有限公司 | QD color master batch and preparation method thereof |
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