CN112859219A - Preparation method of quantum dot diffusion plate - Google Patents
Preparation method of quantum dot diffusion plate Download PDFInfo
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- CN112859219A CN112859219A CN202110263421.3A CN202110263421A CN112859219A CN 112859219 A CN112859219 A CN 112859219A CN 202110263421 A CN202110263421 A CN 202110263421A CN 112859219 A CN112859219 A CN 112859219A
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- 239000002096 quantum dot Substances 0.000 title claims abstract description 93
- 238000009792 diffusion process Methods 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000007639 printing Methods 0.000 claims abstract description 67
- 238000007650 screen-printing Methods 0.000 claims abstract description 25
- 239000011241 protective layer Substances 0.000 claims abstract description 24
- 239000010410 layer Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 238000007865 diluting Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 229920000728 polyester Polymers 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
-
- 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
-
- 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
Abstract
The invention discloses a preparation method of a quantum dot diffusion plate, which comprises the following steps: selecting RED quantum dots and GREEN quantum dots, diluting the RED quantum dots and the GREEN quantum dots in an organic solvent, then fusing the RED quantum dots and the GREEN quantum dots with resin, and stirring and mixing the RED quantum dots and the GREEN quantum dots; the tensile strength is selected to be 45-75N/m2The tensile force is larger than 22N/mm, and the film thickness is 15-17 um; pouring the mixed ink into a screen printing plate, and adjusting printing parameters of a screen printing machine to uniformly print the ink on the surface of the diffusion plate base material; after printing, curing by an IR/mode; adding and printing a quantum dot ink protective layer: and printing a layer of epoxy resin sealing protective layer on the cured product within 4-8H. According to the invention, different types of color point printing ink are manufactured, and then the printing ink with different color points is replaced to print to match with the glass with different color points, so that the requirement on the minimum production quantity of the product is greatly reduced, and the problem that the quantum dots in the production and preparation of the quantum dot diffusion plate lose effectiveness to a certain extent due to high temperature in the three-layer co-extrusion forming process is solved.
Description
Technical Field
The invention relates to the technical field of quantum dot diffusion plate manufacturing, in particular to a preparation method of a quantum dot diffusion plate of a direct type backlight module.
Background
The direct type backlight module generally comprises a back plate, a middle frame, a front frame, a reflector plate, a diffusion sheet, a brightness enhancement sheet and a light bar, wherein the back plate, the middle frame and the front frame mainly play a role in structural support and fixation, and the liquid crystal display screen is mainly attached to the middle frame through a double-faced adhesive tape or fixed on the middle frame through the front frame and used for fixing an optical membrane. The light bar mainly provides a backlight light source, and the diffusion plate and the membrane play a role in light uniformization of the light source.
Liquid crystal display screens have been designed with prior emphasis on the appearance ID, and have begun to focus on the essential enhancement of display-the enhancement of vivid picture colors, gamut range, color saturation, and the like. The quantum dot material is needed to be matched for improving the color gamut value of the display screen. The main quantum dot materials in the current market mainly adopt two forms, namely a three-layer co-extrusion diffusion plate and a quantum dot film; the quantum dot film has a color failure area in a certain range at the cutting edge, and the three-layer co-extrusion diffusion plate has certain abnormal picture display conditions caused by quantum dot high-temperature failure and non-uniform quantum dot distribution in the production and preparation process; and both the quantum dot diaphragm and the quantum dot diffusion plate have the technical problems of inflexible adjustment of coloring dots, high manufacturing cost, high manufacturing difficulty and the like.
Disclosure of Invention
The invention provides a preparation method of a quantum dot diffusion plate, aiming at solving the technical problems that: the technical problem that the color of the cut edge of the quantum film in the prior art is invalid in a certain range exists.
In view of the above problems of the prior art, according to one aspect of the present disclosure, the following technical solutions are adopted in the present invention:
a preparation method of a quantum dot diffusion plate comprises the following steps:
ink blending: selecting RED quantum dots and GREEN quantum dots, diluting the RED quantum dots and the GREEN quantum dots in an organic solvent, then fusing the RED quantum dots and the GREEN quantum dots with resin, and stirring and mixing the RED quantum dots and the GREEN quantum dots;
selecting a base material of a diffusion plate;
screen printing plate design/production: selecting a screen printing plate with the tensile strength of 45-75N/m2, the tension of more than 22N/mm and the film thickness of 15-17 um;
quantum dot printing: pouring the mixed ink into a screen printing plate, and adjusting printing parameters of a screen printing machine to uniformly print the ink on the surface of the diffusion plate base material;
curing the printing layer of the quantum dot printing ink: after printing, curing by an IR/mode, wherein the temperature of the IR curing mode is controlled to be 60-65 ℃, and the rotating speed is controlled to be 25-33 r/m;
adding and printing a quantum dot ink protective layer: and printing a layer of epoxy resin sealing protective layer on the cured product within 4-8H, wherein the thickness of the epoxy resin sealing protective layer is 10-15 um.
In order to better realize the invention, the further technical scheme is as follows:
further, in the ink preparation step, the viscosity of the prepared ink is controlled within the range of 5500-6500 CPS.
Further, in the selected diffusion plate, a base material of PC, PMMA or PS is selected.
Further, in the screen printing plate design/production step, a polyester mesh or a stainless steel wire mesh is selected, and an aluminum frame is selected as a screen frame.
Further, in the quantum dot printing step, the film thickness is controlled to be 35-100 um.
Further, in the step of printing the quantum dot ink protective layer, the surface hardness of the epoxy resin sealing protective layer is greater than 1H.
Further, the screen printing machine comprises a base, an outer shell with a downward opening is mounted at the top of the base, a screen printing output end is mounted on the inner wall of the top of the outer shell, a support plate is mounted at the top of the screen printing output end, limiting rods are mounted at two ends of the bottom of the support plate, a workbench is mounted in the outer shell at the top of the base, a placing groove is formed in the top of the workbench, a placing plate is slidably mounted in the placing groove, a fixing mechanism is mounted on the surface of the placing plate, rotating rods are in threaded connection with the surfaces of the two ends of the placing plate, positioning cylinders are mounted at two ends of the top of the workbench, positioning rods are rotatably mounted on one side of the positioning cylinders on the left side, and the positioning cylinders are; two electric push rods are installed on the inner wall of the top of the outer shell, and the bottom ends of the two electric push rods are fixedly connected with the top of the supporting plate.
Further, fixed establishment includes riser, spring and clamp plate, the bottom of riser with place the top fixed connection of board, one side of riser with the one end fixed connection of spring, the other end of spring is connected with the clamp plate.
Further, the spout has all been seted up on the both sides inner wall of standing groove, the dwang with the bottom of spout is rotated and is connected, the carousel is installed on the top of dwang.
Compared with the prior art, the invention has the following beneficial effects:
according to the preparation method of the quantum dot diffusion plate, quantum dots are converted into printable quantum dot ink, different types of color dot ink are manufactured, and then the ink printing of different color dots is replaced to match with glass of different color dots, so that the minimum production requirement on products is greatly reduced, and personalized customized production is facilitated; the equipment investment capital is reduced, and the existing mature printing process equipment is effectively utilized; the problem of quantum dot because high temperature has certain range inefficacy in the three-layer is crowded shaping altogether, quantum dot diffuser plate in the production preparation is solved.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
A preparation method of a quantum dot diffusion plate comprises the following steps:
step one, ink blending:
the RED quantum dots and the GREEN quantum dots are respectively selected according to the proportion, diluted in an organic solvent and then fused with resin, fully stirred and mixed, and the viscosity of the prepared ink is controlled within the range of 5500-6500 CPS.
Selecting a diffusion plate:
the base material of the selected diffusion plate can be PC, PMMA, PS and the like.
The ink mixing step and the diffuser plate selecting step do not have the requirement of sequence, and can be exchanged or carried out simultaneously.
Step three, screen printing plate design/production:
the polyester net or stainless steel wire net is selected, the net frame is generally an aluminum frame, and the tensile strength of the polyester net is 45-75N/m2The tension is larger than 22N/mm, and the film thickness is 15-17 um.
Step four, quantum dot printing:
and pouring the mixed printing ink into a screen printing plate, adjusting printing parameters (scraper pressure, ink covering knife pressure, stroke and plate lifting interval) of a screen printing machine, uniformly printing on the surface of a diffusion plate, printing in a full-covering mode, and controlling the film thickness to be 35-100 mu m.
Step five, curing the printing layer of the quantum dot printing ink:
after printing, curing by IR/means. In the IR curing mode, the temperature needs to be controlled at 60-65 ℃, and the rotating speed needs to be controlled at 25-33 r/m.
Step six, printing a quantum dot ink protective layer:
and (4) printing a layer of epoxy resin sealing protective layer in 4-8H on the product cured in the fifth step, wherein the thickness of the protective layer is 10-15um, and the surface hardness is greater than 1H.
Example 1
A preparation method of a quantum dot diffusion plate comprises the following steps:
step one, ink blending:
the RED quantum dots and the GREEN quantum dots are respectively selected according to the proportion, diluted in an organic solvent, then fused with resin, fully stirred and mixed, and the viscosity of the prepared ink is controlled within the range of 5700 CPS.
Selecting a diffusion plate:
the base material PC is selected as the diffusion plate.
Step three, screen printing plate design/production:
selecting a polyester net, selecting an aluminum frame as a net frame, wherein the tensile strength of the polyester net is 50N/m2Tension 24N/mm, film thickness 16 um.
Step four, quantum dot printing:
and pouring the mixed printing ink into a screen printing plate, adjusting printing parameters (scraper pressure, ink covering knife pressure, stroke and plate lifting interval) of the screen printing machine, uniformly printing on the surface of the diffusion plate, printing in a full-covering mode, and controlling the film thickness to be 40 mu m.
Step five, curing the printing layer of the quantum dot printing ink:
after printing, curing by IR/means. In the IR curing mode, the temperature needs to be controlled at 62 ℃ and the rotating speed needs to be controlled at 27 r/m.
Step six, printing a quantum dot ink protective layer:
and C, printing a layer of epoxy resin sealing protective layer in 5H on the product cured in the fifth step, wherein the thickness of the protective layer is 12 mu m, and the surface hardness is 1.5H.
Example 2
A preparation method of a quantum dot diffusion plate comprises the following steps:
step one, ink blending:
the RED quantum dots and the GREEN quantum dots are respectively selected according to the proportion, diluted in an organic solvent, then fused with resin, fully stirred and mixed, and the viscosity of the prepared ink is controlled within the range of 5900 CPS.
Selecting a diffusion plate:
the base material PMMA is selected as a diffusion plate.
Step three, screen printing plate design/production:
stainless steel wire mesh is selected, and an aluminum frame is generally selected as the mesh frame.
Step four, quantum dot printing:
and pouring the mixed printing ink into a screen printing plate, adjusting printing parameters (scraper pressure, ink covering knife pressure, stroke and plate lifting interval) of the screen printing machine, uniformly printing on the surface of the diffusion plate, printing in a full-covering mode, and controlling the film thickness to be 50 microns.
Step five, curing the printing layer of the quantum dot printing ink:
after printing, curing by IR/means. In the IR curing mode, the temperature needs to be controlled at 63 ℃ and the rotating speed needs to be controlled at 28 r/m.
Step six, printing a quantum dot ink protective layer:
and C, printing a layer of epoxy resin sealing protective layer in 6H on the product cured in the fifth step, wherein the thickness of the protective layer is 13um, and the surface hardness is 2H.
Example 3
A preparation method of a quantum dot diffusion plate comprises the following steps:
step one, ink blending:
the RED quantum dots and the GREEN quantum dots are respectively selected according to the proportion, diluted in an organic solvent, then fused with resin, fully stirred and mixed, and the viscosity of the prepared ink is controlled within the 6200CPS range.
Selecting a diffusion plate:
the substrate PS is selected as a diffusion plate.
Step three, screen printing plate design/production:
selecting a polyester net, selecting an aluminum frame as a net frame, wherein the tensile strength of the polyester net is 60N/m2Tension 26N/mm, film thickness 16.5 um.
Step four, quantum dot printing:
and pouring the mixed printing ink into a screen printing plate, adjusting printing parameters (scraper pressure, ink covering knife pressure, stroke and plate lifting interval) of the screen printing machine, uniformly printing on the surface of the diffusion plate, printing in a full-covering mode, and controlling the film thickness to be 80 microns.
Step five, curing the printing layer of the quantum dot printing ink:
after printing, curing by IR/means. In the IR curing mode, the temperature needs to be controlled at 64 ℃ and the rotating speed needs to be controlled at 31 r/m.
Step six, printing a quantum dot ink protective layer:
and C, printing a layer of epoxy resin sealing protective layer on the product cured in the fifth step within 7H, wherein the thickness of the protective layer is 14 mu m, and the surface hardness is 2.5H.
In summary, by the preparation method of the quantum dot diffusion plate, quantum dots are converted into printable quantum dot ink, only different types of color dot ink need to be manufactured, and the glass with different color dots is matched by replacing the ink with different color dots for printing. The present invention solves the following problems: 1) the problem of color failure of a certain range of cutting edges of the quantum film; 2) the three-layer co-extrusion quantum dot diffusion plate has the problem that the quantum dots lose effectiveness in a certain range due to high temperature in production and preparation; 3) the problem of uniform distribution of the three-layer co-extrusion diffusion plate quantum dots is solved; 4) the three-layer co-extrusion quantum dot diffusion plate and the quantum dot diaphragm have the problems of difficult manufacture, high cost and inflexible adjustment of color dots.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (6)
1. A preparation method of a quantum dot diffusion plate is characterized by comprising the following steps:
ink blending: selecting RED quantum dots and GREEN quantum dots, diluting the RED quantum dots and the GREEN quantum dots in an organic solvent, then fusing the RED quantum dots and the GREEN quantum dots with resin, and stirring and mixing the RED quantum dots and the GREEN quantum dots;
selecting a base material of a diffusion plate;
screen printing plate design/production: the tensile strength is selected to be 45-75N/m2The tensile force is larger than 22N/mm, and the film thickness is 15-17 um;
quantum dot printing: pouring the mixed ink into a screen printing plate, and adjusting printing parameters of a screen printing machine to uniformly print the ink on the surface of the diffusion plate base material;
curing the printing layer of the quantum dot printing ink: after printing, curing by an IR/mode, wherein the temperature of the IR curing mode is controlled to be 60-65 ℃, and the rotating speed is controlled to be 25-33 r/m;
adding and printing a quantum dot ink protective layer: and printing a layer of epoxy resin sealing protective layer on the cured product within 4-8H, wherein the thickness of the epoxy resin sealing protective layer is 10-15 um.
2. The method for preparing a quantum dot diffusion plate according to claim 1, wherein in the step of preparing the ink, the viscosity of the prepared ink is controlled within the range of 5500-6500 CPS.
3. The method of claim 1, wherein the base material PC, PMMA or PS is selected for the selected diffuser plate.
4. The method for manufacturing a quantum dot diffuser plate according to claim 1, wherein in the screen designing/manufacturing step, a polyester mesh or a stainless steel wire mesh is selected, and an aluminum frame is selected as the screen frame.
5. The method of claim 1, wherein in the quantum dot printing step, the thickness of the film is controlled to be 35-100 um.
6. The method for preparing a quantum dot diffusion plate according to claim 1, wherein in the step of printing the quantum dot ink protective layer, the surface hardness of the epoxy resin sealing protective layer is greater than 1H.
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Cited By (3)
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| CN113719805A (en) * | 2021-09-03 | 2021-11-30 | 厦门市米宫科技有限公司 | Quantum dot reflective material and preparation method and application thereof |
| CN114654847A (en) * | 2022-02-28 | 2022-06-24 | 金发科技股份有限公司 | Quantum dot diffusion plate and preparation method and application thereof |
| CN117143419A (en) * | 2023-10-31 | 2023-12-01 | 南通创亿达新材料股份有限公司 | Quantum dot diffusion plate and preparation method thereof |
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| CN114654847A (en) * | 2022-02-28 | 2022-06-24 | 金发科技股份有限公司 | Quantum dot diffusion plate and preparation method and application thereof |
| CN114654847B (en) * | 2022-02-28 | 2024-03-15 | 金发科技股份有限公司 | Quantum dot diffusion plate and preparation method and application thereof |
| CN117143419A (en) * | 2023-10-31 | 2023-12-01 | 南通创亿达新材料股份有限公司 | Quantum dot diffusion plate and preparation method thereof |
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