CN114325901A - Light splitting film, and preparation method and system thereof - Google Patents
Light splitting film, and preparation method and system thereof Download PDFInfo
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- CN114325901A CN114325901A CN202210005633.6A CN202210005633A CN114325901A CN 114325901 A CN114325901 A CN 114325901A CN 202210005633 A CN202210005633 A CN 202210005633A CN 114325901 A CN114325901 A CN 114325901A
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000003292 glue Substances 0.000 claims description 94
- 238000010030 laminating Methods 0.000 claims description 27
- 238000003860 storage Methods 0.000 claims description 25
- 238000005507 spraying Methods 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000004049 embossing Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000002313 adhesive film Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000004888 barrier function Effects 0.000 abstract description 2
- 238000000265 homogenisation Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 39
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a light splitting film, a preparation method and a system thereof, which are suitable for a display device, wherein the light splitting film comprises a PSA layer and a raised microstructure layer attached to the PSA layer, the raised microstructure layer is far away from the PSA layer, the raised microstructure layer is of a hollow structure, and particles are contained in the PSA layer; light gets into through the PSA layer in the beam splitting membrane, jet out through protruding micro-structure layer again, light gets into behind the PSA layer, the particle in the PSA layer reflects the light source, the diffuse reflection effect, make incident light distribution homogenization, again behind protruding micro-structure layer, can convert light into collimation and more even light, simultaneously because protruding micro-structure layer sets up to hollow structure, can further promote the homogeneity and the brilliance of incident light, and promote the shielding nature of LED lamp pearl, can reach the effect of replacing LGP and diffusion barrier.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light splitting film, and a preparation method and a system thereof.
Background
In small-size display screens such as mobile phones and IPADs, the light source is a direct type Mini-LED lamp bead for emitting light, a light guide plate is generally adopted in a backlight module to disperse a point light source into a surface light source, and then a diffusion film is adopted to uniformly diffuse the light source. However, when the conventional light guide plate is adopted, due to the point light source characteristic of the LED, when the LED light is incident on the surface of the light guide plate, a hot spot (hotspot) phenomenon is easily caused on the light emitting surface guiding the light to the optical film, so that the light is not uniformly dispersed and an undesired bright spot is caused. In addition, the light guide plate and the diffusion film are usually combined in the prior art, but this increases the overall thickness of the structure, which is not favorable for the thinning requirement of the product for consumers.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to: provided are a light splitting film, a manufacturing method and a system thereof, which can enable the light splitting film to have good light splitting and diffusing effects and enable a product with the light splitting film to be thinner.
In order to achieve the above object, the present invention provides a light splitting film comprising: a light splitting film, comprising:
a PSA layer;
and a raised micro-structured layer conformable to the PSA layer;
the protrusions in the raised micro-structured layer are distal to the PSA layer;
the PSA layer contains particles therein;
the protruding microstructure layer is a hollow structure.
Further, the particle size of the particles is 5 to 8 μm.
Further, the convex microstructure layer is any one of a microlen, a triangular pyramid, a rectangular pyramid or a prism.
Further, a first release layer is arranged on one side, away from the raised microstructure layer, of the PSA layer;
one side that protruding micro-structure layer kept away from the PSA layer sets up the second from the type layer.
The invention also provides a preparation method of the light splitting film, which comprises the following steps:
s1, coating UV glue on the second release layer;
s2, stamping the UV glue to form a raised micro-structure layer, wherein the raised micro-structure layer 3 is a hollow structure, and the projection of the raised micro-structure layer is close to the second release layer;
s3, coating PSA glue containing particles on the first release layer, and drying the PSA glue coated with the particles to form the PSA layer;
s4, attaching the raised micro-structure layer and the PSA layer to form an attaching film;
the laminating process is as follows: spraying the bonding glue on the PSA layer, and bonding the PSA layer on the raised microstructure layer while spraying the bonding glue to form a bonding film;
and S5, curing the adhesive film to form the light splitting film.
The invention also provides a preparation system of the light splitting film, which comprises:
the embossing module is used for embossing the convex microstructure layer;
an oven, wherein the oven is used for drying the PSA glue containing the particles coated on the second release layer to form the PSA layer;
and the laminating device is used for laminating the PSA layer with the raised microstructure layer to form a laminating film.
Further, the imprint module includes: the device comprises a workbench and a convex microstructure imprinting mold;
the workbench is used for placing the first release layer to be imprinted and coated with the UV glue;
the raised microstructure imprinting mold is used for imprinting the UV glue to form the raised microstructure layer.
Further, the laminating device comprises a glue storage device, a digital electronic controller and laminating equipment;
the glue storage device is used for storing and spraying the bonding glue;
the digital electronic controller is connected with the glue storage tank and is used for monitoring the glue feeding amount;
the laminating equipment is used for laminating the PSA layer and the raised microstructure layer.
Further, the glue storage device comprises a glue storage tank, a guide pipe, a spray head and a control valve;
the glue storage box is used for storing the attaching glue;
the spray head is used for spraying the bonding glue on the PSA layer;
the control valve is used for controlling the glue feeding amount.
Still further, the glue storage device further comprises: a first press roll and a second press roll;
the first pressing roller and the second pressing roller are symmetrically arranged on two sides of the guide pipe and used for controlling glue feeding amount.
According to the light splitting film provided by the invention, light enters from the PSA layer, and because the PSA layer contains particles, the particles have the effects of reflecting and diffusely reflecting a Mini-LED light source, so that the incident light distribution is homogenized, and meanwhile, certain shielding property is given to the PSA layer due to the distribution of the particles; the light is homogenized by the PSA layer and then enters the raised micro-structure layer, the raised micro-structure layer enables the entering light to be converted into collimated and more uniform light, meanwhile, the raised micro-structure layer is of a hollow structure, so that the uniformity and the brightness of incident light can be further improved, the shielding performance of the LED lamp beads is improved, and the effect of replacing LGP and a diffusion film can be achieved; and the thickness of the PSA layer and the raised microstructure layer is easy to control, so that a thinned light splitting film product is easier to produce.
According to the preparation method provided by the invention, the same amount of the adhesive glue can be sprayed on the PSA, the PSA layer is adhered on the raised microstructure layer, the adhering and the spraying of the adhesive glue are carried out simultaneously, the glue feeding amount sprayed on the PSA layer can be controlled in time, and the situation that the glue feeding amount of the hollow structure in the raised microstructure layer is reduced as much as possible can be ensured.
According to the preparation system provided by the invention, the digital electronic controller can monitor the glue feeding amount at any time, the control valve is used for controlling the glue feeding amount, and the first pressing roller and the second pressing roller are additionally arranged for more accurately controlling the glue feeding amount so as to ensure that the hollow structure in the raised micro-structural layer has the least glue feeding amount as possible.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.
FIG. 1 is a schematic structural view of a light splitting film;
FIG. 2 is a schematic structural diagram of another light splitting film;
FIG. 3 is a process for making a light splitting film;
FIG. 4 is a system for producing a light splitting film;
FIG. 5 is a schematic structural diagram of a raised microstructure imprinting mold;
FIG. 6 is a schematic structural view of a bonding apparatus;
FIG. 7 is a schematic view of a glue storage device;
fig. 8 is a schematic structural view of a bonding apparatus.
In the figure, 1, a light splitting film, 2, a PSA layer, 3, a raised microstructure layer, 4, a second release layer, 5, a first release layer, 11, an imprinting module, 12, an oven, 13, a laminating device, 122, a raised microstructure imprinting mold, 131, a glue storage device, 132, a digital electronic controller, 133, laminating equipment, 1311, a glue storage tank, 1312, a conduit, 1313, a first pressing roller, 1314, a second pressing roller, 1315, a spray head, 1316, a control valve, 1331, a receiving roller, 1332, a laminating roller, 1333, a supporting roller of the receiving roller, 1334 and a supporting roller of the laminating roller.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
The present invention provides a light splitting film 1, as shown in fig. 1, including:
a PSA layer 2;
and a raised micro-structure layer 3 attached to the PSA layer 2;
the protrusions of the raised micro-structured layer 3 are distal to the PSA layer;
the raised micro-structural layer 3 is a hollow structure.
The raised micro-structure layer 3 is any one of a micro lens, a triangular pyramid, a rectangular pyramid or a prism (the raised micro-structure layer 3 in fig. 1 only shows a micro lens structure, and it is understood that the structure is not limited thereto).
The PSA layer contains particles, and the particle diameter of the particles is 5-8 μm.
The PSA layer 2 is a light incident surface, and the raised micro-structure layer 3 is a light emergent surface.
The light splitting film 1 provided by the invention can be better suitable for a small-size display device scene with a Mini-LED light source in a display device, such as a mobile phone or an IPAD, wherein the number of LED lamp beads is usually 3000 plus 13000.
The light emitted by the Mini-LED light source enters from the PSA layer 2, and because the PSA layer 2 contains particles, the particles have the functions of reflection and diffuse reflection on the Mini-LED light source, so that the incident light distribution is uniform, and meanwhile, certain shielding property is given to the PSA layer 2 due to the distribution of the particles.
Light that Mini-LED light source sent enters protruding micro-structure layer 3 after the 2 homogenizes on PSA layer, protruding micro-structure layer 3 makes the light that gets into convert collimation and more even light, simultaneously because protruding micro-structure layer 3 sets up to hollow structure, can further promote the homogeneity and the brilliance of incident light to promote the shielding nature of LED lamp pearl, can reach the effect of replacing LGP and diffusion barrier.
Further, as shown in fig. 2, a first release layer 5 is disposed on a side of the PSA layer 2 away from the raised microstructure layer 3;
and a second release layer 4 is arranged on one side of the raised microstructure 3, which is far away from the PSA layer 2.
The thickness of the PSA layer 2 is 10-200 μm;
the thickness of the raised micro-structural layer 3 is 15-50 μm;
the Pitch value among the raised microstructures in the raised microstructure layer 3 is 20-100 mu m, and the depth is 10-100 mu m.
In the using process of the light splitting film, the second release layer 4 and the first release layer 5 are peeled off, the whole light splitting film product only comprises the PSA layer 2 and the raised microstructure layer 3, the PSA layer 2 and the raised microstructure layer 3 are both formed by glue, and the thickness is easy to control, so that the thinned light splitting film product is easier to produce.
Example two
As shown in fig. 3, the present invention further provides a method for preparing the spectroscopic film 1, including:
s1, coating UV glue on the second release layer 4;
s2, stamping the UV glue to form a raised micro-structure layer 3, wherein the raised micro-structure layer 3 is of a hollow structure, and the projection of the raised micro-structure layer 3 is close to the second release layer 4;
s3, coating PSA glue containing particles on the first release layer 5, and drying the PSA glue coated with the particles to form the PSA layer 2;
s4, attaching the raised micro-structure layer 3 and the PSA layer 2 to form an attaching film;
the laminating process is as follows: spraying the bonding glue on the PSA layer 2, and bonding the PSA layer 2 on the raised microstructure layer 3 while spraying the bonding glue to form a bonding film;
and S5, curing the adhesive film to form the light splitting film.
The refractive index of the UV glue for forming the protruding microstructures 3 is 1.49-1.57;
the refractive index of the PSA glue forming the PSA layer 2 is 1.47-1.59.
According to the preparation method of the light splitting film 1, the PSA layer 2 is attached to the raised micro-structure layer 3 while the adhesive is sprayed on the PSA layer 2, the attaching and the adhesive spraying are carried out simultaneously, the amount of the adhesive sprayed on the PSA layer 2 can be controlled in time, so that the hollow structure in the raised micro-structure layer 3 is ensured to be fed as little as possible, and the hollow structure can be ensured to a greater extent.
It should be noted that, the formation of the raised micro-structure layer 3 and the formation of the PSA layer 2 can be performed simultaneously, which can save production time and improve efficiency.
Adopt traditional laminating mode to do: firstly coating glue on the PSA layer 2, and then attaching the PSA layer 2 coated with the glue on the raised microstructure layer 3 to form the light splitting film 1. The method is difficult to control the glue feeding amount in the hollow structure, the glue feeding amount is usually 4-7 mu m, and the peeling force is more than 150.
According to the preparation method of the light splitting film 1, the gluing process and the spraying and gluing glue are carried out simultaneously by adjusting the gluing mode, the glue feeding amount of the hollow structure can be accurately controlled, the glue feeding amount is 2-4 mu m after the method is used, and the peeling force is below 120; because the glue feeding amount is lower, the optical brightness of the light splitting film provided by the invention is higher than that of a light splitting film formed by a traditional laminating mode by more than 3%.
EXAMPLE III
As shown in fig. 4, the present invention further provides a system for preparing the spectroscopic film 1, comprising:
the stamping device comprises a stamping module 11, an oven 12 and a laminating device 13;
the embossing module 11 is used for embossing the convex microstructure layer 3;
the imprint module may include: a stage (not shown), a raised microstructure imprinting mold 111.
The workbench is used for placing the second release layer 4 to be imprinted and coated with UV glue;
the raised microstructure imprinting mold 111 is shown in fig. 5 (the raised microstructure only shows Microlens structures, it is understood that the raised microstructure is not limited thereto), and the raised microstructure imprinting mold 111 is placed above the worktable for imprinting the UV glue to form the raised microstructure layer 3.
The oven 12 is used for drying the PSA glue containing particles coated on the first release layer 5 to form the PSA layer 2.
The laminating device 13 is used for laminating the PSA layer 2 and the raised microstructure layer to form a laminating film;
as shown in fig. 6, the attaching device 13 includes a glue storage device 131, a digital electronic controller 132, and an attaching device 133;
the glue storage device 131 is used for storing and spraying the bonding glue;
as shown in fig. 7, said glue storage means 131 comprises a glue storage tank 1311, a conduit 1312, a spray head 1315 and a control valve 1316;
the glue storage box 1311 is used for storing bonding glue;
the spray head 1315 is used for spraying the bonding glue on the PSA layer 2;
the control valve 1316 is used for controlling the glue inlet amount;
further, the glue storage device 131 may further include: first pressure roller 1313 and second pressure roller 1314;
the first pressing roller 1313 and the second pressing roller 1314 are symmetrically arranged on two sides of the guide pipe 1312 to further control the glue feeding amount;
the digital electronic controller 132 is connected to the glue storage tank 131 for monitoring the glue feeding amount.
The attaching device 133 is configured to attach the PSA layer 2 to the raised microstructure layer 3, where the protrusions in the raised microstructure layer 3 are away from the PSA layer 2; as shown in fig. 8, the bonding apparatus 133 includes a receiving roller 1331 and a bonding roller 1332; supporting roller 1333 of the receiving roller and supporting roller 1334 of the attaching roller can also be included;
the receiving roller 1331 is used for placing the raised micro-structural layer 3 to be attached;
the laminating roller 1332 is used to laminate the PSA layer 2 onto the raised microstructured layer 3.
It should be noted that: the worktable 121 may be used to carry a first release layer 5 coated with UV glue to be imprinted, and may also be used to carry a second release layer 4 coated with PSA glue.
It should be noted that the glue storage device 131 may spray the bonding glue onto the PSA layer 2, or may spray the bonding glue onto the raised micro-structural layer 3, but in order to ensure the hollow structure in the raised micro-structural layer, it is preferable to select the bonding glue to be sprayed onto the PSA layer.
The raised micro-structured layer 3 may be placed on top, or the PSA layer 2 may be placed on top, when applied. Likewise, take-up roll 1331 may be used to place the raised micro-structured layer 3 to be applied, and may also be used to place the PSA layer 2 to be applied; the laminating roller 1332 may also be replaced accordingly, and may be selected according to the needs of the manufacturing process.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A light splitting film, comprising:
a PSA layer;
and a raised micro-structured layer conformable to the PSA layer;
the protrusions in the raised micro-structured layer are distal to the PSA layer;
the PSA layer contains particles therein;
the protruding microstructure layer is a hollow structure.
2. A spectroscopic film as set forth in claim 1 wherein the particles have a particle size of 5 to 8 μm.
3. A spectroscopic film as set forth in claim 1 wherein the raised microstructured layer is any one of a microlen, a triangular pyramid, a rectangular pyramid, or a prism.
4. A spectroscopic film as set forth in claim 1 wherein the PSA layer is provided with a first release layer on a side thereof away from the raised microstructure layer;
one side that protruding micro-structure layer kept away from the PSA layer sets up the second from the type layer.
5. A spectroscopic film production method according to claim 4, comprising:
s1, coating UV glue on the second release layer;
s2, stamping the UV glue to form the raised micro-structure layer, wherein the raised micro-structure layer is of a hollow structure, and the projection of the raised micro-structure layer is close to the second release layer;
s3, coating PSA glue containing particles on the first release layer, and drying the PSA glue coated with the particles to form the PSA layer;
s4, attaching the raised micro-structure layer and the PSA layer to form an attaching film;
the laminating process is as follows: spraying the bonding glue on the PSA layer, and bonding the PSA layer on the raised microstructure layer while spraying the bonding glue to form a bonding film;
and S5, curing the adhesive film to form the light splitting film.
6. A spectroscopic film production system according to claim 4, comprising:
the embossing module is used for embossing the convex microstructure layer;
an oven, wherein the oven is used for drying the PSA glue containing the particles coated on the second release layer to form the PSA layer;
and the laminating device is used for laminating the PSA layer with the raised microstructure layer to form a laminating film.
7. The manufacturing system of claim 6, wherein the stamping module comprises: the device comprises a workbench and a convex microstructure imprinting mold;
the workbench is used for placing the first release layer to be imprinted and coated with the UV glue;
the raised microstructure imprinting mold is used for imprinting the UV glue to form the raised microstructure layer.
8. The manufacturing system of claim 6, wherein the attaching device comprises a glue storage device, a digital electronic controller and an attaching device;
the glue storage device is used for storing and spraying the bonding glue;
the digital electronic controller is connected with the glue storage tank and is used for monitoring the glue feeding amount;
the laminating equipment is used for laminating the PSA layer and the raised microstructure layer.
9. The manufacturing system of claim 8, wherein said glue storage device comprises a glue storage tank, a conduit, a spray head, and a control valve;
the glue storage box is used for storing the attaching glue;
the spray head is used for spraying the bonding glue on the PSA layer;
the control valve is used for controlling the glue feeding amount.
10. The manufacturing system of claim 9, wherein said glue storage device further comprises: a first press roll and a second press roll;
the first pressing roller and the second pressing roller are symmetrically arranged on two sides of the guide pipe and used for controlling glue feeding amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210005633.6A CN114325901A (en) | 2022-01-05 | 2022-01-05 | Light splitting film, and preparation method and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210005633.6A CN114325901A (en) | 2022-01-05 | 2022-01-05 | Light splitting film, and preparation method and system thereof |
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| CN114325901A true CN114325901A (en) | 2022-04-12 |
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| CN202210005633.6A Pending CN114325901A (en) | 2022-01-05 | 2022-01-05 | Light splitting film, and preparation method and system thereof |
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| CN104676316A (en) * | 2013-11-21 | 2015-06-03 | 马田专业公司 | Illumination system comprising an optical light mixing rod |
| CN105058826A (en) * | 2015-08-11 | 2015-11-18 | 华南理工大学 | Optical film forming method and device |
| CN108897083A (en) * | 2018-08-28 | 2018-11-27 | 张家港康得新光电材料有限公司 | A kind of optical compound film and preparation method thereof |
| CN111679491A (en) * | 2020-05-11 | 2020-09-18 | 深圳市隆利科技股份有限公司 | Direct type backlight device |
| CN212061693U (en) * | 2020-03-17 | 2020-12-01 | 咸阳彩虹光电科技有限公司 | Structure for reducing halo of display device and Mini LED display device |
| CN214160258U (en) * | 2020-12-01 | 2021-09-10 | 佛山市树坚胶粘制品有限公司 | Gluing device of coating machine |
-
2022
- 2022-01-05 CN CN202210005633.6A patent/CN114325901A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676316A (en) * | 2013-11-21 | 2015-06-03 | 马田专业公司 | Illumination system comprising an optical light mixing rod |
| CN105058826A (en) * | 2015-08-11 | 2015-11-18 | 华南理工大学 | Optical film forming method and device |
| CN108897083A (en) * | 2018-08-28 | 2018-11-27 | 张家港康得新光电材料有限公司 | A kind of optical compound film and preparation method thereof |
| CN212061693U (en) * | 2020-03-17 | 2020-12-01 | 咸阳彩虹光电科技有限公司 | Structure for reducing halo of display device and Mini LED display device |
| CN111679491A (en) * | 2020-05-11 | 2020-09-18 | 深圳市隆利科技股份有限公司 | Direct type backlight device |
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