CN114296274A - Quantum dot diffusion film for Mini Led module and preparation method - Google Patents
Quantum dot diffusion film for Mini Led module and preparation method Download PDFInfo
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- CN114296274A CN114296274A CN202210020774.5A CN202210020774A CN114296274A CN 114296274 A CN114296274 A CN 114296274A CN 202210020774 A CN202210020774 A CN 202210020774A CN 114296274 A CN114296274 A CN 114296274A
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Abstract
The invention belongs to the technical field of quantum dot diffusion films, and particularly relates to a quantum dot diffusion film for a Mini Led module and a preparation method of the quantum dot diffusion film. The invention relates to a quantum dot diffusion film for a Mini Led module, which comprises: a substrate layer; the positions of the hemispherical quantum dot light conversion regions corresponding to the lamp beads are attached to the surface of the substrate layer; and the diffusion layer is wrapped on the outer layer of the hemispherical quantum dot light conversion region. The center of Mini LED lamp pearl is as the location central point of spinning and is fixed a position the spinning in with liquid crystal module, pile up layer upon layer, form hemisphere quantum dot light conversion district, every hemisphere structure quantum dot light conversion district covers the lamp pearl, the light that launches from Mini LED enters quantum dot light conversion district most earlier like this, it is highest to the utilization ratio in a poor light, quantum dot glue only needs in quantum dot light conversion district simultaneously, do not need whole membrane coating, quantum dot's use amount has been reduced, quantum dot diffusion barrier's cost has been practiced thrift.
Description
Technical Field
The invention belongs to the technical field of quantum dot diffusion films, and particularly relates to a quantum dot diffusion film for a Mini Led module and a preparation method of the quantum dot diffusion film.
Background
With the rapid development of the Mini LED display technology, the Mini LED display products have been applied to ultra-large screen high definition display, such as commercial fields of monitoring and commanding, high definition broadcasting, high-end cinema, medical diagnosis, advertisement display, conference exhibition, office display, virtual reality, etc.
The Mini LED technology is matched with the quantum dot diffusion film to be used in the liquid crystal industry, and the huge commercial application value is displayed. However, since the quantum dots are expensive, the use of the quantum dots for preparing the whole optical film can make the product expensive and affect the popularization and application.
Disclosure of Invention
The invention provides a quantum dot diffusion film for a Mini Led module and a preparation method thereof.
In order to solve the above technical problems, the present invention provides a quantum dot diffusion film for a Mini Led module, comprising: a substrate layer; the positions of the hemispherical quantum dot light conversion regions corresponding to the lamp beads are attached to the surface of the substrate layer; and the diffusion layer is wrapped on the outer layer of the hemispherical quantum dot light conversion region.
In another aspect, the invention further provides a preparation method of the quantum dot diffusion film for the Mini Led module, which comprises the following steps: mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles to prepare a quantum dot spinning solution; adjusting a spinning head of a spinning machine to correspond to the position of a lamp bead, adding the quantum dot spinning solution into the spinning machine for spinning to form quantum dot spinning lines, and controlling the stroke of the spinning head to enable the width of each layer of spinning area to be continuously reduced so that the quantum dot spinning lines are stacked on the surface of a base material layer by layer and form a hemispherical quantum dot light conversion area after UV curing; mixing acrylic resin and second scattering particles to prepare diffusion liquid; and adding the diffusion solution into a spinning machine for spinning, and forming a diffusion layer after the diffusion spinning lines are stacked layer by layer and are subjected to UV curing.
The quantum dot diffusion film has the advantages that the center of a Mini LED lamp bead in a liquid crystal module is used as a positioning central point of spinning for positioning spinning, the spinning is carried out layer by layer to form hemispherical quantum dot light conversion regions, each hemispherical structure quantum dot light conversion region covers the lamp bead, therefore, light emitted from the Mini LED enters the quantum dot light conversion region most firstly, the backlight utilization rate is highest, meanwhile, quantum dot glue only needs to be coated in the quantum dot light conversion region, the whole film is not needed to be coated, the use amount of quantum dots is reduced, and the cost of the quantum dot diffusion film is saved; the quantum dot light conversion area is designed to be hemispherical, so that light emitted by the Mini Led lamp beads can be focused, the problem of glare of the module is avoided, and the luminance of the quantum dot diffusion film is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a quantum dot diffusion film for a Mini Led module according to the present invention.
In the figure:
a substrate layer 1; a hemispherical quantum dot light conversion region 2; a diffusion layer 3; and 4. a lamp bead.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
As shown in fig. 1, the present invention provides a quantum dot diffusion film for a Mini Led module, comprising: a substrate layer 1; the hemispherical quantum dot light conversion regions 2 are attached to the surface of the substrate layer at positions corresponding to the lamp beads 4; and the diffusion layer 3 is wrapped on the outer layer of the hemispherical quantum dot light conversion region.
According to the quantum dot diffusion film, the center of a Mini LED lamp bead in a liquid crystal module is used as a positioning central point of spinning for positioning spinning, the spinning is carried out layer by layer to form hemispherical quantum dot light conversion regions, each hemispherical structure quantum dot light conversion region covers the lamp bead, so that light emitted from the Mini LED enters the quantum dot light conversion region at first, the backlight utilization rate is highest, meanwhile, quantum dot glue only needs to be coated on the quantum dot light conversion region, the whole film is not needed, the use amount of quantum dots is reduced, and the cost of the quantum dot diffusion film is saved; design quantum dot light conversion district 2 for the hemisphere to play the effect of spotlight to the light that Mini Led lamp pearl launches, avoid the module to appear the glare problem.
Optionally, the height h1 from the highest point of the hemispherical quantum dot light conversion region 2 to the surface of the base material layer is 5-20 μm; the relation between the width D1 of the hemispherical quantum dot light conversion region 2 and the diameter D of the lamp beads is that D1-D is not less than 30 mu m.
Optionally, the upper surface of the diffusion layer 3 is in an upwardly convex arch shape; and the height h2 from the highest point of the diffusion layer to the surface of the base material layer is 25-50 μm.
Specifically, the upper surface of the diffusion layer 3 is arched, so that light is further condensed, and the luminance of the quantum dot diffusion film is improved.
In another aspect, the invention further provides a preparation method of the quantum dot diffusion film for the Mini Led module, which comprises the following steps: mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles to prepare a quantum dot spinning solution; adjusting a spinning head of a spinning machine to correspond to the position of a lamp bead, adding the quantum dot spinning solution into the spinning machine for spinning to form quantum dot spinning lines, and controlling the stroke of the spinning head to enable the width of each layer of spinning area to be continuously reduced so that the quantum dot spinning lines are stacked on the surface of a base material layer by layer and form a hemispherical quantum dot light conversion area after UV curing; mixing acrylic resin and second scattering particles to prepare diffusion liquid; and adding the diffusion solution into a spinning machine for spinning, and forming a diffusion layer after the diffusion spinning lines are stacked layer by layer and are subjected to UV curing.
Specifically, acrylic resin, red quantum dots, green quantum dots and first scattering particles are fully and uniformly mixed to form a quantum dot spinning solution, the quantum dot spinning solution is injected into a glue inlet barrel of a spinning machine, spinning is started after the spinning position and the spinning movement range parameters of the spinning machine are set, the quantum dot spinning solution forms spinning lines on a substrate layer 1 through a spinning head, the spinning lines are stacked layer by layer according to the program setting, and a quantum dot light conversion area 2 is formed through continuous UV curing; the spinning machine sets the position of a spinning head as the corresponding position of each Mini LED, the width of each layer of spinning area is continuously reduced, and a quantum dot light conversion area covering each Mini LED lamp bead is formed to prepare a semi-finished product.
And mixing and stirring acrylic resin and the second scattering particles for 30min to obtain a diffusion liquid, injecting the diffusion liquid into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning movement range of the spinning machine, starting spinning, and correcting the accurate thickness of each layer by laser height measurement detection of the spinning machine. The diffusion layer 3 is formed by layer-by-layer stacking and by continuous UV curing.
Optionally, the mass ratio of the acrylic resin, the red quantum dots, the green quantum dots and the first scattering particles in the quantum dot spinning solution is 100: (1-5): (3-7): (4-8).
Optionally, the particle size of the first scattering particles is 0.05-0.3 μm.
Optionally, the aperture of a spinning head used in the quantum dot spinning solution is 0.6-0.9 μm, and the frequency of a spinning pump is set at 20-30 Hz.
Optionally, the mass ratio of the acrylic resin to the second scattering particles in the diffusion liquid is 1: (8-10).
Optionally, the particle size of the second scattering particles is 0.3-0.6 μm.
Optionally, the diameter of the spinning nozzle used by the diffusion liquid is 0.9-1.2 μm, and the frequency of the spinning pump is set at 25-35 Hz.
Example 1
Firstly, mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles according to the proportion of 100: 3: 5: 6, sufficiently and uniformly mixing to form a quantum dot spinning solution, injecting the quantum dot spinning solution into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, then starting spinning, forming spinning lines on the substrate layer 1 by the quantum dot spinning solution through a spinning head, stacking the spinning lines layer by layer according to the program setting, and continuously performing UV curing to form a quantum dot light conversion area; setting the position of a spinning head as the position corresponding to each Mini LED by the spinning machine, and continuously reducing the width of each layer of spinning area to form a quantum dot light conversion area covering each Mini LED lamp bead to prepare a semi-finished product; wherein the particle diameter of the first scattering particles is 0.18 μm, the aperture of the selected spinning nozzle is 0.8 μm, and the frequency of the spinning pump is set at 25 Hz.
And mixing and stirring acrylic resin and second scattering particles according to a ratio of 1:9 for 30min to obtain a diffusion liquid, injecting the diffusion liquid into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, starting spinning, and correcting the accurate thickness of each layer through laser height measurement detection of the spinning machine. The diffusion layer is formed by layer-by-layer stacking and by continuous UV curing. Wherein the particle diameter of the second scattering particles is 0.5 μm, the aperture of the selected spinning nozzle is 1 μm, and the frequency of the spinning pump is set to be 30 Hz.
Example 2
Firstly, mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles according to the proportion of 100: 1: 7: 4, sufficiently and uniformly mixing to form a quantum dot spinning solution, injecting the quantum dot spinning solution into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, then starting spinning, forming spinning lines on the substrate layer 1 by the quantum dot spinning solution through a spinning head, stacking the spinning lines layer by layer according to the program setting, and continuously performing UV curing to form a quantum dot light conversion area; setting the position of a spinning head as the position corresponding to each Mini LED by the spinning machine, and continuously reducing the width of each layer of spinning area to form a quantum dot light conversion area covering each Mini LED lamp bead to prepare a semi-finished product; wherein the particle diameter of the first scattering particles is 0.05 μm, the aperture of the selected spinning nozzle is 0.6 μm, and the frequency of the spinning pump is set at 22 Hz.
And mixing and stirring acrylic resin and second scattering particles according to a ratio of 1:9 for 30min to obtain a diffusion liquid, injecting the diffusion liquid into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, starting spinning, and correcting the accurate thickness of each layer through laser height measurement detection of the spinning machine. The diffusion layer is formed by layer-by-layer stacking and by continuous UV curing. Wherein the particle diameter of the second scattering particles is 0.3 μm, the aperture of the selected spinning nozzle is 0.9 μm, and the frequency of the spinning pump is set to be 28 Hz.
Example 3
Firstly, mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles according to the proportion of 100: 4: 6: 8, sufficiently and uniformly mixing to form a quantum dot spinning solution, injecting the quantum dot spinning solution into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, then starting spinning, forming spinning lines on the substrate layer 1 by the quantum dot spinning solution through a spinning head, stacking the spinning lines layer by layer according to the program setting, and continuously performing UV curing to form a quantum dot light conversion area; setting the position of a spinning head as the position corresponding to each Mini LED by the spinning machine, and continuously reducing the width of each layer of spinning area to form a quantum dot light conversion area covering each Mini LED lamp bead to prepare a semi-finished product; wherein the particle diameter of the first scattering particles is 0.3 μm, the aperture of the selected spinning nozzle is 0.7 μm, and the frequency of the spinning pump is set at 30 Hz.
And mixing and stirring acrylic resin and second scattering particles according to a ratio of 1:10 for 30min to obtain a diffusion liquid, injecting the diffusion liquid into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, starting spinning, and correcting the accurate thickness of each layer through laser height measurement detection of the spinning machine. The diffusion layer is formed by layer-by-layer stacking and by continuous UV curing. Wherein the particle diameter of the second scattering particles is 0.6 μm, the aperture of the selected spinning nozzle is 1.2 μm, and the frequency of the spinning pump is set to 35 Hz.
Example 4
Firstly, mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles according to the proportion of 100: 5: 4: 7, sufficiently and uniformly mixing to form a quantum dot spinning solution, injecting the quantum dot spinning solution into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, then starting spinning, forming spinning lines on the substrate layer 1 by the quantum dot spinning solution through a spinning head, stacking the spinning lines layer by layer according to the program setting, and continuously performing UV curing to form a quantum dot light conversion area; setting the position of a spinning head as the position corresponding to each Mini LED by the spinning machine, and continuously reducing the width of each layer of spinning area to form a quantum dot light conversion area covering each Mini LED lamp bead to prepare a semi-finished product; wherein the particle diameter of the first scattering particles is 0.11 μm, the aperture of the selected spinning nozzle is 0.9 μm, and the frequency of the spinning pump is set at 20 Hz.
And mixing and stirring acrylic resin and second scattering particles according to a ratio of 1:8 for 30min to obtain a diffusion liquid, injecting the diffusion liquid into a glue inlet barrel of a spinning machine, setting parameters of a spinning position and a spinning moving range of the spinning machine, starting spinning, and correcting the accurate thickness of each layer through laser height measurement detection of the spinning machine. The diffusion layer is formed by layer-by-layer stacking and by continuous UV curing. Wherein the second scattering particles have a particle size of 0.4 μm, the selected spinneret aperture is 1.1 μm, and the spinning pump frequency is set to 25 Hz.
The quantum dot diffusion films prepared in the examples were subjected to a correlation performance test, and the test data are summarized in table 1.
Table 1 performance data of the quantum dot diffusion films prepared in the examples
From the data in table 1, it can be seen that within the limited range, the higher the height values of h1 and h2, the higher the luminance; the larger the area of the quantum dot light conversion region covering the lamp bead is, the higher the luminance is.
In summary, the quantum dot diffusion film of the invention uses the center of the Mini LED lamp bead in the liquid crystal module as the positioning center point of the spinning for positioning spinning, and is stacked layer by layer to form the hemispherical quantum dot light conversion region, and each hemispherical structure quantum dot light conversion region covers the lamp bead, so that the light emitted from the Mini LED enters the quantum dot light conversion region at first, the backlight utilization rate is highest, and meanwhile, the quantum dot glue is only needed in the quantum dot light conversion region, and the whole film is not needed to be coated, thereby reducing the usage amount of the quantum dot and saving the cost of the quantum dot diffusion film; design for the hemisphere with quantum dot light conversion district to play the effect of spotlight to the light that Mini Led lamp pearl launches, avoid the module to appear dazzling the light problem, promoted the brilliance of quantum dot diffusion barrier.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A quantum dot diffusion film for a Mini Led module, comprising:
a substrate layer;
the positions of the hemispherical quantum dot light conversion regions corresponding to the lamp beads are attached to the surface of the substrate layer; and
and the diffusion layer is wrapped on the outer layer of the hemispherical quantum dot light conversion region.
2. The quantum dot diffusion film according to claim 1,
the height h1 from the highest point of the hemispherical quantum dot light conversion region to the surface of the base material layer is 5-20 mu m;
the relation between the width D1 of the hemispherical quantum dot light conversion area and the diameter D of the lamp bead is that D1-D is not less than 30 mu m.
3. The quantum dot diffusion film according to claim 1,
the upper surface of the diffusion layer is in an upward convex arch shape; and
the height h2 between the highest point of the diffusion layer and the surface of the base material layer is 25-50 μm.
4. A preparation method of a quantum dot diffusion film for a Mini Led module is characterized by comprising the following steps:
mixing acrylic resin, red quantum dots, green quantum dots and first scattering particles to prepare a quantum dot spinning solution;
adjusting a spinning head of a spinning machine to correspond to the position of a lamp bead, adding the quantum dot spinning solution into the spinning machine for spinning to form quantum dot spinning lines, and controlling the stroke of the spinning head to enable the width of each layer of spinning area to be continuously reduced so that the quantum dot spinning lines are stacked on the surface of a base material layer by layer and form a hemispherical quantum dot light conversion area after UV curing;
mixing acrylic resin and second scattering particles to prepare diffusion liquid;
and adding the diffusion solution into a spinning machine for spinning, and forming a diffusion layer after the diffusion spinning lines are stacked layer by layer and are subjected to UV curing.
5. The method according to claim 4,
the mass ratio of the acrylic resin, the red quantum dots, the green quantum dots and the first scattering particles in the quantum dot spinning solution is 100: (1-5): (3-7): (4-8).
6. The method according to claim 4,
the particle size of the first scattering particles is 0.05-0.3 μm.
7. The method according to claim 4,
the aperture of a spinning head used by the quantum dot spinning solution is 0.6-0.9 mu m, and the frequency of a spinning pump is set at 20-30 Hz.
8. The method according to claim 4,
the mass ratio of the acrylic resin to the second scattering particles in the diffusion liquid is 1: (8-10).
9. The method according to claim 4,
the second scattering particles have a particle size of 0.3 to 0.6 μm.
10. The method according to claim 4,
the aperture of a spinning head used by the diffusion liquid is 0.9-1.2 mu m, and the frequency of a spinning pump is set to be 25-35 Hz.
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2022
- 2022-01-10 CN CN202210020774.5A patent/CN114296274A/en active Pending
Patent Citations (6)
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| CN104566015A (en) * | 2014-12-01 | 2015-04-29 | 深圳市华星光电技术有限公司 | Quantum dot backlight module and display device |
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