CN108388050B - Preparation method of quantum dot film light guide assembly and corresponding backlight module - Google Patents
Preparation method of quantum dot film light guide assembly and corresponding backlight module Download PDFInfo
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- CN108388050B CN108388050B CN201810301736.0A CN201810301736A CN108388050B CN 108388050 B CN108388050 B CN 108388050B CN 201810301736 A CN201810301736 A CN 201810301736A CN 108388050 B CN108388050 B CN 108388050B
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- G02B6/005—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
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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
- G02B6/0066—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]
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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
- G02F1/133603—Direct backlight with LEDs
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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
Abstract
The invention discloses a preparation method of a quantum dot film light guide component and a corresponding backlight module thereof, wherein the quantum dot film light guide component comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a base material layer which are sequentially arranged from bottom to top; the specific preparation of the quantum dot film light guide component comprises the following steps: 1) preparing red quantum dot glue; 2) preparing green quantum dot glue; 3) coating the prepared green quantum glue dispensing water on the substrate layer by using a coating device to form a wet film, and then semi-curing the wet film by using a UV curing device; 4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device. The quantum dot film has higher blue light conversion efficiency and more stable fluorescence performance; the thickness of the QLCD is reduced while the display effect is enhanced, so that the product is lighter, thinner and more beautiful.
Description
Technical Field
The invention relates to the technical field of liquid crystal display screens, in particular to a preparation method of a quantum dot film light guide assembly and a corresponding backlight module.
Background
The backlight source using the quantum dot material is the backlight source with the highest color purity at present, and the liquid crystal display device using the backlight source has the advantages of high color purity, strong reduction capability, excellent color rendering performance and the like, so that the quantum dots are widely applied to the field of liquid crystal display.
A general quantum dot liquid crystal display (QLCD) is composed of a liquid crystal panel and a backlight module. The backlight module comprises a light source, a reflecting film, a light guide plate, a quantum dot film, a brightness enhancement film and a diffusion film. Light from a light source enters the inside of the light guide plate, and the liquid crystal panel is uniformly irradiated with the light by the action of the optical film.
The light guide plate used by the traditional liquid crystal display device is mainly made of optical acrylic (PMMA)/PC material, and the thickness is generally 3-5 mm, so that the thickness of the display device is difficult to reduce. In recent years, in order to make the liquid crystal display device more light and thin, attempts have been made to use a glass light guide plate instead of the conventional acryl light guide plate. At present, the glass light guide plate is mainly applied to a liquid crystal display device of a light and thin type edge-lit backlight (edge-lit). The thickness of the glass light guide plate is about 1-2 mm, the thickness of the television can be reduced by 75% and the weight of the television can be reduced by 32%, and the thickness of the common liquid crystal television can be reduced to be less than 5mm by adopting the glass light guide plate.
Disclosure of Invention
The present invention aims to provide a method for manufacturing a quantum dot film light guide assembly and a backlight module corresponding to the same, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a quantum dot film light guide assembly comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a base material layer which are sequentially arranged from bottom to top; the red quantum dot layer, the green quantum dot layer and the base material layer form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing a green quantum dot stock solution with 20-30 mass% of a monomer, 45-60 mass% of an acrylic resin and 1-3 mass% of a photoinitiator to form green quantum dot glue, wherein the mass ratio of the green quantum dot stock solution to the total mass of the green quantum dot glue is;
3) coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a quantum dot film light guide assembly comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a base material layer which are sequentially arranged from bottom to top; the red quantum dot layer, the green quantum dot layer and the base material layer form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing the prepared green quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form green quantum dot glue, wherein the mass is the ratio of the green quantum dot glue to the total mass of the green quantum dot glue;
3) coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a quantum dot film light guide assembly comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a base material layer which are sequentially arranged from bottom to top; the red quantum dot layer, the green quantum dot layer and the base material layer form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing the prepared green quantum dot stock solution, 30 mass percent of monomer and 1-3 mass percent of photoinitiator, adding 25-30 mass percent of acrylic resin with better hydrophobicity and 25-30 mass percent of epoxy resin with better oxygen discharge property, and uniformly mixing to form green quantum dot glue, wherein the mass percent is the ratio of the prepared green quantum dot stock solution to the total mass of the green quantum dot glue;
3) coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
The substrate layer is covered with a functional coating layer, and the functional coating layer is a diffusion coating layer with a diffusion effect or a prism structure coating layer with a brightening effect.
The base material layer is a barrier film, the thickness range of the base material layer is 50-225 mu m, and the water and oxygen transmission rates of the barrier film are both less than 1 x 10 < -1 > g/m 2/day.
Wherein, the barrier film is a PET film.
The photoinitiator is Irgacure819 or TPO, the monomer is a mixture of mono-functional group or multi-functional group monomers, the diffusion particles are one or a mixture of ZnO, ZnS, TiO2, organic silicon particles or PMMA, and the particle size of the diffusion particles is 1-5 mu m.
The core part of the quantum dot is composed of one or more of Cd, Zn, Se, Te or S, and the shell layer is composed of one or more of Al, Ni or Ti.
And the four side end faces of the quantum dot film light guide assembly are respectively coated with a water-blocking organic coating and an oxygen-blocking organic coating in a sealing manner.
Wherein, the configuration process of the green quantum dot glue in the step 2) is as follows: firstly, uniformly mixing the prepared green quantum dot stock solution with 30 mass percent of monomer and 1-3 mass percent of photoinitiator, then adding 25-30 mass percent of acrylic resin with better hydrophobicity and 25-30 mass percent of epoxy resin with better oxygen discharge property, and uniformly mixing to form the green quantum dot glue. In order to achieve the purpose, the invention provides the following technical scheme: a backlight module comprises a blue light LED lamp, a reflecting film, a quantum dot film light guide assembly prepared by any one of the methods, a brightness enhancement film and a diffusion film.
Compared with the prior art, the invention has the beneficial effects that: the substrate layer of the quantum dot film is a barrier film with water and oxygen resistance, and the four side end faces of the assembly formed by the quantum dot film and the glass light guide plate are all sealed with organic barrier coatings with water and oxygen resistance, so that the measures have barrier effect on water and oxygen in the external environment, the stability of the quantum dots is protected more effectively, and the fluorescence life of the membrane is prolonged; the front surface of the base material layer is coated with a coating with a diffusion or brightening effect, so that the functionality of the membrane can be enhanced; the red quantum dot layer and the green quantum dot layer are coated in a layered mode, and the red quantum dot layer with longer emission wavelength is attached to the light guide plate, so that the interaction between the two quantum dots is weakened, the mutual absorption of emitted light between the two quantum dots is reduced, and the conversion efficiency of blue light is effectively improved; the red quantum dot film component has the advantages that the red quantum dot film layer has pressure-sensitive adhesive property and is directly attached to the glass light guide plate to form the component for use, the thickness and the weight of the product are greatly reduced while the color gamut range and the color saturation of a QLCD product are improved, and the product is lighter, thinner and more attractive in appearance.
Drawings
FIG. 1 is a schematic structural diagram of a backlight module according to the present invention;
fig. 2 is a schematic structural diagram of a quantum dot film light guide assembly according to the present invention.
In the drawings: 11. a blue LED lamp; 12. a reflective film; 13. a quantum dot film light guide assembly; 14. a brightness enhancement film; 15. a diffusion membrane; 21. a glass light guide plate; 22. a red quantum dot layer; 23. a green quantum dot layer; 24. a substrate layer; 25. functional coating layer
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The preparation method of the quantum dot film light guide assembly of the invention is shown in fig. 1 and 2, and the quantum dot film light guide assembly 13 comprises a glass light guide plate 21, a red quantum dot layer 22, a green quantum dot layer 23 and a substrate layer 24 which are sequentially arranged from bottom to top; the red quantum dot layer 22, the green quantum dot layer 23 and the base material layer 24 form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly 13 comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing a green quantum dot stock solution with 20-30 mass% of a monomer, 45-60 mass% of an acrylic resin and 1-3 mass% of a photoinitiator to form green quantum dot glue, wherein the mass ratio of the green quantum dot stock solution to the total mass of the green quantum dot glue is; this is the first method of dispensing green quantum dot glue.
3) Coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
In the preparation method of the quantum dot film light guide assembly, in the step 2), 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles can be uniformly dispersed in 10 mass percent of monomer to form green quantum dot stock solution; and uniformly mixing the prepared green quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form green quantum dot glue, wherein the mass ratio of the green quantum dot glue to the total mass of the green quantum dot glue is shown. This is the second method of dispensing green quantum dot glue.
Preferably, the substrate layer 24 is covered with a functional coating layer 25, and the functional coating layer 25 is a diffusion coating layer having a diffusion effect or a prism structure coating layer having a brightness enhancement effect.
Preferably, the base material layer is a barrier film, the thickness of the base material layer ranges from 50 to 225 microns, and the water and oxygen transmission rate of the barrier film is less than 1 x 10 < -1 > g/m 2/day.
Further, the barrier film is a PET film.
Preferably, Irgacure819 or TPO is adopted as the photoinitiator, the monomer is a mixture of mono-functional or multi-functional monomers, the diffusion particles are one or a mixture of ZnO, ZnS, TiO2, organic silicon particles or PMMA, and the particle size of the diffusion particles is in the range of 1-5 μm.
Preferably, the core part of the quantum dot is composed of one or more of Cd, Zn, Se, Te or S, and the shell layer is composed of one or more of Al, Ni or Ti.
Preferably, four side end faces of the quantum dot film light guide assembly are sealed and coated with a water-blocking organic coating and an oxygen-blocking organic coating.
Further, the configuration process of the green quantum dot glue in the step 2) is as follows: firstly, uniformly mixing the prepared green quantum dot stock solution with 30 mass percent of monomer and 1-3 mass percent of photoinitiator, then adding 25-30 mass percent of acrylic resin with better hydrophobicity and 25-30 mass percent of epoxy resin with better oxygen discharge property, and uniformly mixing to form the green quantum dot glue.
As shown in fig. 1, a backlight module includes a blue LED lamp 11, a reflective film 12, a quantum dot film light guide assembly 13 prepared by any of the above methods, a brightness enhancement film 14, and a diffusion film 15.
Generally, a backlight unit of a quantum dot liquid crystal display device is composed of a blue LED lamp, a reflective film, a light guide plate, a quantum dot film, lower and upper brightness enhancement films, and a diffusion film. In the invention, the quantum dot film light guide component formed by the pressure sensitive adhesive type quantum dot film and the glass light guide plate is adopted to replace the light guide plate and the quantum dot film in the traditional module.
As shown in fig. 2, in the quantum dot film light guide assembly of the present invention, the red quantum dot adhesive layer 22 adjacent to the glass light guide plate 21 has a pressure sensitive adhesive property, and the red quantum dot adhesive layer 22 can be tightly attached to the glass light guide plate 21 under the pressure to form an assembly. The optical performance and the mechanical performance of the light guide plate are superior to those of the traditional acrylic light guide plate, and the thickness of the whole module is greatly reduced. Because the quantum dot has a wide absorption spectrum range, the red quantum dot adhesive layer 22 with a large emission peak value is arranged on one side close to the glass light guide plate 21, when a blue light source enters from the end face of the glass light guide plate 21, light firstly passes through the red quantum dot adhesive layer 22 to excite the red quantum dot to emit red light, and then passes through the green quantum dot adhesive layer 23 to excite the green quantum dot, and the design reduces the probability that green light emitted by the green quantum dot is absorbed by the red quantum dot again, and greatly improves the conversion efficiency of the blue light. The excited red and green light is mixed with the rest blue light, and then passes through the functional coating layer 25 on the front surface of the substrate layer 24 and other optical films to provide high-brightness uniform white light for the liquid crystal panel.
In the embodiment, the quantum dots are one or more of cadmium-containing quantum dots or cadmium-free quantum dots, and are selected from quantum dots with a core-shell structure with good stability. The core part of the quantum dot mainly comprises Cd, Zn, Se, Te, S and other elements, and the shell layer mostly comprises Al, Ni or Ti and other metal elements. The quantum dot with the core coated by the metal element as the shell component has better stability and higher fluorescence quantum yield. The red quantum dot adhesive layer 22 is mainly formed by mixing red quantum dots and UV-curable pressure-sensitive adhesive, wherein the UV-curable pressure-sensitive adhesive is one or more of acrylic pressure-sensitive adhesive or polyurethane acrylic pressure-sensitive adhesive, but is not limited to the above two types, and acrylic pressure-sensitive adhesive is preferred in the embodiment; the green quantum dot glue layer 23 is formed by mixing green quantum dots and UV curing glue, and the glue is preferably UV curing glue with good water and oxygen isolation performance and good compatibility with the quantum dots and can also be UV curing pressure-sensitive glue.
In the embodiment, the diffusion particles dispersed in the glue are one or a mixture of ZnO, ZnS, TiO2, organic silicon particles or PMMA, and the particle size range is 1-5 μm.
Example 1
A preparation method of a quantum dot film light guide component comprises the following specific steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of ZnO diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of ZnO diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; then, uniformly mixing the green quantum dot stock solution with 20-30% by mass of a monomer, 45-60% by mass of an acrylic resin and 1-3% by mass of a photoinitiator (Irgacure819 or TPO) to form green quantum dot glue, wherein the mass ratio of the green quantum dot stock solution to the total mass of the green quantum dot glue;
3) coating the prepared green quantum glue dispensing water on a substrate layer by using a coating device to form a wet film, wherein the substrate layer is a barrier film with water and oxygen transmission rates less than 1 x 10 < -2 > (g/m2 >/day) and high water and oxygen resistance, and the thickness of the substrate layer is 100 microns; then, curing the wet film through a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film (the thicknesses of the green and red quantum dot glue layers are both 50 microns);
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
Example 2
A method for preparing a quantum dot film light guide assembly, which is different from embodiment 1 in that after a quantum dot film is laminated with a glass light guide plate to form the quantum dot film light guide assembly, four side end faces of the quantum dot film light guide assembly are coated with an organic coating having water and oxygen blocking functions and good light transmittance, in this embodiment, the water blocking organic coating is preferably polyvinylidene chloride, and the oxygen blocking organic coating is preferably polyvinyl alcohol.
Example 3
The preparation method of the quantum dot film light guide assembly is different from the embodiment 1 in that the preparation process of the green quantum dot glue is as follows: firstly, uniformly mixing a green quantum dot stock solution (the preparation method of the stock solution is the same as that in example 1) with 30 mass percent of monomer and 1-3 mass percent of photoinitiator (Irgacure819 or TPO), and then adding 25-30 mass percent of acrylic resin with good hydrophobicity and 25-30 mass percent of epoxy resin with good oxygen discharge property into the mixture to uniformly mix the mixture to form the green quantum dot glue. The quantum dot film coating and UV curing process was the same as example 1, except that the substrate layer was replaced with a barrier film having water, oxygen permeability of about 1 x 10-1(g/m2/day), and low water and oxygen barrier properties, as in example 1. Finally, the pressure sensitive adhesive type quantum dot film with the thickness of the substrate layer of 100 microns and the thicknesses of the green quantum dot adhesive layer and the red quantum dot adhesive layer of 50 microns is obtained. The method for treating the side end face of the quantum dot film light guide assembly is the same as that in the embodiment 2, namely, the sealing coating is carried out by using the organic coating.
Example 4
The preparation method of the quantum dot film light guide assembly is different from the embodiment 1 in that the preparation process of the green quantum dot glue is as follows: and uniformly mixing the green quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive adhesive to form the green quantum dot adhesive. The quantum dot film coating and UV curing process was the same as in example 1. The method for processing the side end face of the quantum dot film light guide assembly is the same as that of the embodiment 2.
Example 5
The preparation method of the quantum dot film light guide assembly is different from that of the embodiment 1 in that the base material layer is replaced by a PET base material layer with a diffusion coating layer which is coated on the front surface. The method for processing the side end face of the quantum dot film light guide assembly is the same as that of the embodiment 2.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A preparation method of a quantum dot film light guide component is characterized by comprising the following steps: the quantum dot film light guide assembly comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a substrate layer which are sequentially arranged from bottom to top; the red quantum dot layer, the green quantum dot layer and the base material layer form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing a green quantum dot stock solution with 20-30 mass% of a monomer, 45-60 mass% of an acrylic resin and 1-3 mass% of a photoinitiator to form green quantum dot glue, wherein the mass ratio of the green quantum dot stock solution to the total mass of the green quantum dot glue is;
3) coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
2. A preparation method of a quantum dot film light guide component is characterized by comprising the following steps: the quantum dot film light guide assembly comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a substrate layer which are sequentially arranged from bottom to top; the red quantum dot layer, the green quantum dot layer and the base material layer form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing the green quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form green quantum dot glue, wherein the mass ratio of the green quantum dot stock solution to the total mass of the green quantum dot glue is;
3) coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
3. A preparation method of a quantum dot film light guide component is characterized by comprising the following steps: the quantum dot film light guide assembly comprises a glass light guide plate, a red quantum dot layer, a green quantum dot layer and a substrate layer which are sequentially arranged from bottom to top; the red quantum dot layer, the green quantum dot layer and the base material layer form a pressure-sensitive adhesive type quantum dot film, and the specific preparation of the quantum dot film light guide assembly comprises the following steps:
1) uniformly dispersing 0.2 mass percent of red quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form a red quantum dot stock solution; then, uniformly mixing the red quantum dot stock solution with 85-90% by mass of UV (ultraviolet) curing acrylic pressure-sensitive glue to form red quantum dot glue, wherein the mass ratio of the red quantum dot stock solution to the total mass of the red quantum dot glue is;
2) uniformly dispersing 0.8 mass percent of green quantum dot powder and 1-3 mass percent of diffusion particles in 10 mass percent of monomers to form green quantum dot stock solution; uniformly mixing the prepared green quantum dot stock solution, 30 mass percent of monomer and 1-3 mass percent of photoinitiator, adding 25-30 mass percent of acrylic resin with better hydrophobicity and 25-30 mass percent of epoxy resin with better oxygen discharge property, and uniformly mixing to form green quantum dot glue, wherein the mass percent is the ratio of the prepared green quantum dot stock solution to the total mass of the green quantum dot glue;
3) coating the prepared green quantum dot glue water on the substrate layer by using a coating device to form a wet film, and then curing the wet film by using a UV curing device to form an incompletely cured green quantum dot glue layer;
4) coating the red quantum dot glue on the green quantum dot glue layer which is not completely cured in the step 3) by using a coating device, covering a protective film, and completely curing by using a UV curing device to form a pressure-sensitive adhesive type quantum dot film;
5) and (4) removing the protective film of the pressure sensitive adhesive type quantum dot film in the step 4), applying pressure, and tightly attaching the red quantum dot adhesive layer and the glass light guide plate to obtain the quantum dot film light guide assembly.
4. The method of claim 1, 2 or 3, wherein the method comprises the following steps: the substrate layer is covered with a functional coating layer, and the functional coating layer adopts a diffusion coating with a diffusion effect or a prism structure coating with a brightening effect.
5. The method of claim 1, 2 or 3, wherein the method comprises the following steps: the substrate layer adopts a barrier film, the thickness range of the substrate layer is 50-225 mu m, and the water and oxygen transmission rates of the barrier film are both less than 1 multiplied by 10-1g/m2/day。
6. The method of claim 5, wherein the method comprises the following steps: the barrier film is a PET film.
7. The method of claim 1, 2 or 3, wherein the method comprises the following steps: the photoinitiator adopts Irgacure819 or TPO, the monomer is a mixture of mono-functional group or multi-functional group monomers, and the diffusion particles are ZnO, ZnS or TiO2One or more of silicone particles and PMMA particles, and the particle size of the diffusion particles is 1-5 μm.
8. The method of claim 1, 2 or 3, wherein the method comprises the following steps: the core part of the quantum dot is composed of one or more of Cd, Zn, Se, Te or S, and the shell layer is composed of one or more of Al, Ni or Ti.
9. The method of claim 1, 2 or 3, wherein the method comprises the following steps: and the four side end faces of the quantum dot film light guide assembly are respectively coated with a water-blocking organic coating and an oxygen-blocking organic coating in a sealing manner.
10. A backlight module is characterized in that: comprising a blue LED lamp, a reflective film, a quantum dot film light guide component prepared by the method of any one of claims 1 to 9, a brightness enhancement film and a diffusion film.
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