CN111443408A - Brightening diffusion film and preparation method thereof - Google Patents
Brightening diffusion film and preparation method thereof Download PDFInfo
- Publication number
- CN111443408A CN111443408A CN201910913141.5A CN201910913141A CN111443408A CN 111443408 A CN111443408 A CN 111443408A CN 201910913141 A CN201910913141 A CN 201910913141A CN 111443408 A CN111443408 A CN 111443408A
- Authority
- CN
- China
- Prior art keywords
- layer
- film
- glue
- transparent substrate
- optical surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
-
- 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
Abstract
The invention relates to the field of optical films for backlight modules, in particular to a brightening diffusion film and a preparation method thereof. The invention provides a brightening diffusion film and a preparation method thereof, aiming at solving the problem that the existing diffusion film or microlens film can not give consideration to both brightness gain and covering property. The brightening type diffusion film comprises a transparent substrate layer, the transparent substrate layer comprises a first optical surface and a second optical surface, the first optical surface is provided with a micro-lens diffusion structure layer, and the second optical surface is provided with a back coating layer. The brightness enhancement type diffusion film provided by the invention can improve the luminance gain effect and has a good covering effect. By utilizing the preparation method of the brightening diffusion film, the concave microstructure array is used as a working master mask for preparing the micro-lens diffusion structure of the brightening diffusion film, so that the production cost of the brightening diffusion film is greatly reduced.
Description
Technical Field
The invention relates to the field of optical films for backlight modules, in particular to a brightening diffusion film and a preparation method thereof.
Background
The optical film capable of brightening and diffusing in the backlight module generally comprises three types of brightening films, micro-lens films and diffusing films. The brightness enhancement film can improve the brightness of the liquid crystal display by optically collecting light within an effective visual angle range mainly by micro-copying a layer of micro-prism structure on a substrate, but the structure is regular and easy to generate interference; the micro lens film is an optical film material in the liquid crystal display, has the functions of an optical brightness enhancement film and an optical diffusion film, and is used for enhancing the brightness of a light emitting surface and widening an optical visual angle, so that the micro lens film not only can improve the optical gain of the liquid crystal display, but also has a certain atomization effect of scattered light and can improve the covering property; the diffusion film is a randomly-arranged diffusion structure formed by coating particles with different sizes on the surface of the base material, so that the diffusion film has high covering property and light scattering property, cannot generate interference, but has low brightness; the above products suffer from one or more of the following disadvantages: (1) the micro-lens film is generally carved into a regular micro-lens structure with the same size, and interference is easy to generate; (2) the diffusion surface of the diffusion film is generally composed of glue and particles, and multiple refraction and scattering brightness reduction are generated due to the difference of refractive indexes; (3) the diffusion film has more particles, so that the problems of particle falling and the like are easily caused in the cutting, transporting and assembling processes.
The production method of the micro-lens film is generally to use a processed micro-structure metal mold on UV light curing coating equipment, coat light curing glue, and cure and form the micro-lens film. At present, the conventional method is to use a laser engraving process to engrave different types of micro-lens structures on a metal roller; the preparation method of the diffusion film generally comprises the steps of coating glue particles on a base material, and forming a diffusion structure through heat/ultraviolet curing;
the engraving described above presents several problems: 1) the engraving cost is extremely high, the preparation of a single roller can reach hundreds of thousands of processing expenses, and the unit price cost of the existing optical film is seriously exceeded; 2) microlenses that replace optical diffuser films or brightness enhancement films are typically high brightness, high haze, generally small diameter (<30 μm) microlenses, low yield of engraving, long time periods; 3) the engraving difficulty is relatively high, the engraving process is complex, the yield is low, and the production cost of the product can be greatly increased.
The above-described method of coating a diffusion structure has several problems: 1) the coating diffusion particles generally have solvents, so that the environment is polluted, the curing time is long, and the energy consumption is large; 2) the formula of the diffusion glue and the solvent is complex, and the problems of uneven coating, incomplete curing and the like easily occur in production; 3) in the coating process, the diffusion particles are wrapped in the glue solution, the refractive index difference is large, multiple refractions can be generated, and the brightness is influenced.
Disclosure of Invention
The invention provides a brightening diffusion film and a preparation method thereof, aiming at solving the problem that the existing diffusion film or microlens film can not give consideration to both brightness gain and covering property. The brightness enhancement type diffusion film provided by the invention can improve the brightness (brightness) gain effect and has a good covering effect. By utilizing the preparation method of the brightening diffusion film, the concave microstructure array is used as a working master mask for preparing the micro-lens diffusion structure of the brightening diffusion film, so that the production cost of the brightening diffusion film is greatly reduced. The preparation method of the brightening diffusion film provided by the invention greatly reduces the manufacturing cost of the micro-lens structure, has simple preparation process, is suitable for batch production, omits the working procedures of carving and die turnover, and greatly reduces the working difficulty and the preparation cost.
In order to achieve the above purpose, the invention provides the following technical scheme.
The invention provides a brightening diffusion film which comprises a transparent substrate layer, wherein the transparent substrate layer comprises a first optical surface and a second optical surface, the first optical surface is provided with a micro-lens diffusion structure layer (a micro-lens structure layer for short, a micro-structure layer or a micro-lens layer), and the second optical surface is provided with a back coating.
Furthermore, the brightening type diffusion film sequentially comprises a micro-lens diffusion structure layer, a transparent substrate layer and a back coating layer from top to bottom.
Furthermore, the microlens diffusion structure layer comprises a microlens structure (a microlens for short) and a glue layer, the microlens structure is bonded on the first optical surface (the upper surface) of the transparent substrate layer through the glue layer, and the microlens structure and the glue layer are made of the same material.
Further, in the preparation process, the micro-lens structure and the glue layer are integrally formed.
Furthermore, the material of the micro-lens structure layer is the same as that of the substrate layer.
Further, the micro-lens structure is an arc-shaped protrusion structure (arc-shaped protrusion for short).
Furthermore, the microstructure layer comprises randomly arranged arc-shaped convex structures with different sizes.
The micro-lens diffusion structure layer provided by the invention has the functions of light condensation and covering at the same time.
In the arc-shaped protrusion structure, the contour line of the cross section passing through the highest point of the protrusion is an arc line. The arc-shaped protrusion can be a semi-ellipsoid, a hemisphere, a segment or a similar structure, and can also be a shape formed by extending the semi-ellipsoid, the hemisphere or the segment in height.
Further, the curved convex structures (also referred to as spherical convex structures) are selected from convex semi-ellipsoids, hemispheres, segments or similar structures.
Furthermore, the light enters through the second optical surface and then exits through the first optical surface to enter the microstructure layer.
The width of the arc-shaped protruding structure is the maximum width of the section of the arc-shaped protrusion connected with the base material layer, and the height H of the arc-shaped protruding structure is the distance between the highest point of the arc-shaped protrusion and the wave trough of the arc-shaped protrusion. If the arc-shaped convex structure is a hemisphere, the width of the arc-shaped convex structure is the diameter of the hemisphere, and the aspect ratio is 0.5.
Further, the micro-lens structure comprises arc-shaped bulges with different widths. Alternatively, the arc-shaped protrusions are composed of arc-shaped protrusions having different widths.
Furthermore, the width P (bottom side length) of the arc-shaped convex structure is 10-100 mu m, and the aspect ratio is 0.3-0.6.
Further, the arcuate projections are selected from hemispheres, and/or segments. The length P of the bottom edge of the segment is 10-100 μm, the height-to-width ratio is the ratio of the height H/P of the segment, and the height-to-width ratio is 0.3-0.6.
Furthermore, the width of the arc-shaped convex structure is 20-60 mu m, and the aspect ratio is 0.35-0.55.
Furthermore, the width of the arc-shaped convex structure is 25-45 μm, and the aspect ratio is 0.4-0.5.
Furthermore, the arc-shaped convex structures can be distributed in a uniform size or in a mixed distribution with different sizes.
Furthermore, the width of the arc-shaped protrusions can be in uniform size distribution or in mixed distribution with different sizes.
Further, when the sizes are uniformly distributed, the width can be selected to be any 1 size specification of 25-45 um.
Furthermore, when the segment structures are mixed and distributed, the segment structures are matched and combined with two types of large balls and small balls, the diameter of each large ball is 40-45um, and the diameter of each small ball is 25-30 um.
Further, the arc-shaped bulge comprises a large bulge and a small bulge, the diameter of the large bulge is 40-45um, and the diameter of the small bulge is 25-30 um. Further, the number ratio of the large protrusions to the small protrusions is 1:10-1: 1.
Furthermore, the number ratio of the big balls to the small balls is 1:10-1: 1.
Further, the duty ratio of the arc-shaped convex structure is more than or equal to 60%. The duty ratio refers to the percentage of the projection area of the arc-shaped protruding structures (also called microstructures) on the surface (first optical surface) of the transparent base material layer to the area of the first optical surface of the transparent base material layer.
Further, the duty ratio of the arc-shaped convex structure is 60-95%.
Further, the duty ratio of the arc-shaped convex structure is 70-95%.
Further, the duty ratio of the arc-shaped convex structure is 85-95%.
Further, the transparent substrate may be selected from one of polyethylene terephthalate (PET), Polycarbonate (PC), polyvinyl chloride (PVC), or Polymethylmethacrylate (PMMA), and the thickness thereof may be selected from 50 to 300 μm.
The microstructure layer is selected from a UV-cured acrylic resin. Furthermore, the material of the microlens structure layer is one or a combination of at least two of polyurethane acrylic resin, polyether acrylate, epoxy acrylic resin and polyester acrylic resin.
The liquid raw material refractive index of the arc-shaped convex structure resin is selected from 1.44-1.60. Further, the refractive index of the liquid raw material of the resin is selected from 1.46-1.56. Further, the liquid material refractive index of the resin is selected from 1.48 to 1.52.
Further, the brightening diffusion film sequentially comprises a micro-lens diffusion structure layer (a micro-lens structure layer for short or a micro-structure layer), a transparent substrate layer and a back coating layer from top to bottom; the micro-lens diffusion structure layer comprises a micro-lens structure (micro-lens for short) and a glue layer, the micro-lens structure is bonded on a first optical surface (upper surface) of the transparent substrate layer through the glue layer, and the micro-lens structure and the glue layer are made of the same material; the micro-lens structure is an arc-shaped bulge; the arc-shaped convex structure is selected from a hemispherical lens, the width of the hemispherical lens is 10-100 mu m, the height-to-width ratio is 0.3-0.6, the duty ratio of the arc-shaped convex structure is 60-95%, and the refractive index of a liquid raw material of the arc-shaped convex structure resin is selected from 1.44-1.60.
Further, the arc-shaped convex structure is selected from a hemispherical lens, the width of the hemispherical lens is 20-60 μm, the aspect ratio is 0.35-0.55, the duty ratio of the arc-shaped convex structure is 70-95%, and the refractive index of the liquid raw material of the arc-shaped convex structure resin is selected from 1.46-1.56; the transparent substrate is selected from one of polyethylene terephthalate (PET) or Polycarbonate (PC), and the thickness of the transparent substrate is selected from 100-250 μm. The foregoing technical solutions correspond to examples 5 to 10.
Further, the arc-shaped convex structure is selected from a hemispherical lens, the width of the hemispherical lens is 25-45 μm, the aspect ratio is 0.4-0.5, the duty ratio of the arc-shaped convex structure is 85-95%, and the refractive index of the liquid raw material of the arc-shaped convex structure resin is selected from 1.48-1.52; the transparent substrate is selected from one of polyethylene terephthalate (PET), and the thickness of the transparent substrate is selected from 188-. The foregoing technical solutions correspond to examples 8 to 10.
The invention also provides a preparation method of the brightening diffusion film, which comprises the following steps:
(1) preparing a microstructure substrate: distributing a layer of micro-particles on the surface of a substrate by an autodeposition method, and then depositing glue in the gaps among the particles in a deposition mode;
(2) removing the microstructure particles, and preparing a master plate: coating polymer resin on the microparticle layer on the upper surface of the substrate prepared with the glue deposition layer and the microparticle layer, and curing the polymer resin to form close adhesion with the microparticles; peeling the uppermost layer of polymer resin and the microparticles from the substrate, and leaving the substrate and the glue deposition layer, wherein the upper surface of the glue deposition layer forms a concave microstructure arrangement layer, and the part is the prepared mother film;
(3) preparation of microlens film: the mother film is coated on the outer wall of the production line roller, the seam is bonded through an adhesive tape, glue is coated on the surface of the transparent substrate layer, a glue layer is pressed on the surface of the mother film with the concave microstructures, the glue is solidified, and a micro-lens diffusion structure layer can be formed on the first optical surface of the transparent substrate layer.
Further, the preparation method also comprises the following steps:
(4) and preparing the back coating layer on the second optical surface of the transparent substrate layer. Thus, the brightening diffusion film of the invention is obtained.
One aspect of the present invention is a method for manufacturing a brightness enhancing diffuser film at a substantially reduced cost, the method comprising the steps of:
(1) preparing a microstructure substrate: a layer of easily stripped micro bead structure particles is deposited on the surface of the substrate layer by an autodeposition method, and then glue with a certain thickness is deposited in the gaps among the particles in a deposition mode. The thickness of the glue deposition is determined according to the height of the needed arc-shaped protruding structure.
(2) Further, the bead-structured particles may be polymer particles, such as Polymethylmethacrylate (PMMA), Polybutylmethacrylate (PBMA), Polystyrene (PS), Polyurethane (PU), or Polyamide (PA). And may also be inorganic particles such as silica.
(3) Furthermore, the glue layer can adopt materials such as silicon resin, epoxy resin, fluororesin and the like, and has the release characteristic of easy separation from the selected particle material. And infiltrating the resin solution onto the particles in a deposition mode, and drying the solvent to obtain the microstructure matrix layer with the particles.
(4) Removing the microstructured particles, preparing a master (also called master or working master): the substrate having the deposited layer and the fine particle layer prepared as described above is coated with a polymer resin on the fine particle layer on the upper surface thereof, and the polymer resin is cured to form a close adhesion with the particles. And peeling the polymer resin and the particles from the matrix layer, forming a concave microstructure arrangement layer on the surface of the rest deposition layer, and obtaining the prepared mother film by the rest matrix and the deposition layer.
Furthermore, the substrate layer material can be selected from Polycarbonate (PC), polyethylene terephthalate (PET), or polymethyl methacrylate (PMMA), and the thickness of the substrate layer material is controlled at 100-300 μm. Furthermore, the length and the width of the working mother film can be cut into corresponding sizes according to the using size of a customer. Further, the length is 1000mm-2000mm, and the width is 680mm-1600 mm.
Further, the preparation method also comprises the following steps:
preparing a brightening diffusion film: the working mother film is coated on the outer wall of a production line roller, a seam is bonded through a special adhesive tape, glue is coated on the surface of the transparent substrate layer and cured, a glue layer is rolled on the outer surface of the mother film, an arc-shaped protruding structure is formed on the surface of the glue layer, and namely a micro-lens diffusion layer of the arc-shaped protruding structure is formed on the first optical surface of the substrate.
The invention has the beneficial effects that: through the structural design, the width and the aspect ratio of the arc-shaped convex structure can be controlled, and the particle diameters of diffusion particles in the traditional diffusion film are different, and the aspect ratio cannot be effectively controlled, so that the arc-shaped convex structure can have higher optical gain rate. On the other hand, the refractive indexes of particles and glue in the traditional diffusion film are different, and the particles absorb light.
In the preparation method, the traditional microlens convex structure is carved in a carving mode, the carving cost is extremely high, the carving yield is low, the cost is difficult to reduce, and the carving structure lacks the market competitiveness. In the preparation method, the preparation method of the soft film is adopted, the mother film is easy to prepare, the cost is low, the continuous production can be realized, and the preparation cost of the microstructure can be greatly reduced.
Compared with the prior art, the brightening diffusion film provided by the invention can improve the luminance gain effect, has a good covering effect, and has excellent interference resolution performance.
Drawings
FIG. 1 is a schematic view of a conventional diffusion membrane;
FIG. 2 is a schematic view of a brightness enhancing diffuser film according to the present invention;
FIG. 3 is a schematic view of a process for preparing a brightness enhancing diffuser film according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which should be noted that the present invention is only illustrative and should not be construed as limiting the scope of the present invention.
As shown in fig. 2, the present invention provides a brightness enhancement type diffuser film, which includes a transparent substrate layer 20, the transparent substrate layer 20 has a first optical surface and a second optical surface, the first optical surface is provided with a microlens diffusion structure layer 21, and the second optical surface is provided with a back coating layer 22.
As shown in fig. 3, the flow chart of the preparation of the brightness enhancement diffuser film provided by the present invention is schematically shown, where 30 is the substrate for self-assembly, and 31 is the deposited particles with bead structure. 32 is glue deposited in the inter-particle spaces. 40 is a resin layer coated on the surface fine particles. And 50 is a matrix layer remaining after peeling the upper particles. And 51, a glue deposition layer with a concave microstructure remained after the upper layer particles are stripped. And 60 is a base material layer of the finished microstructure. 61 is a microlens diffusion structure layer with an arc convex structure.
The diffusion membranes provided in the examples of the present invention and the comparative examples were tested for their main properties and comparative parameters in the following manner.
1. Brightness gain test A conventional microlens brightness enhancement film was tested to have a brightness of L using a specific backlight0The brightness of the brightness enhancement diffuser film of the present invention was again tested to be L1Then, the brightness gain of the brightness enhancement type diffusion film of the present invention is L1/L0。
2. Covering property: and assembling the cut diaphragm into a direct type backlight module, and observing the covering degree and the diffusion effect of the lamp beads on the display screen at a vertical angle after the backlight module is lightened. Evaluation grade: good > better > bad.
3. Visual angle: the specific backlight source is used to measure the rotation angle of the center point of the light source, and the test brightness is 1/3 of the vertical center brightness, which is the visible angle. The sum of the visual angles of the two sides rotation is the visual angle.
4. Haze: and (3) using a haze meter to keep a light source incident from the surface of the back coating and emergent from the surface of the diffusion layer, and testing the haze difference of the product. The haze is relatively better when the haze is high.
The brightness enhancement diffuser film and the production process provided by the present invention will be further described with reference to the following examples.
Example 1
The brightening diffusion film sequentially comprises a micro-lens diffusion structure layer (a micro-lens structure layer for short), a transparent substrate layer and a back coating layer. The microstructure layer includes an arc-shaped protrusion structure.
The arc-shaped convex structure is selected from a hemispherical lens.
The back coating is selected from common back coatings.
Examples 2 to 10
A brightness enhancing diffuser film as provided in example 1.
The technical parameters of the microlens diffusion structure layer and the transparent substrate layer of the brightness enhancement type diffuser films provided in examples 1 to 10 are shown in the following tables 1 to 1 and 1 to 2.
Table 1-1 microlens diffuser layer parameters for brightness enhancing diffuser films provided in examples 1-10
Tables 1-2 substrate layer parameters for brightness enhancing diffuser films provided in examples 1-10
Comparative example 1
As shown in fig. 1, the conventional diffusion film includes a diffusion layer, a base material layer 10, and a back coating layer 13 in this order; the diffusion layer comprises a glue layer 11, and diffusion particles 12.
According to a conventional method, glue and diffusion particles are coated on the surface of a polyethylene terephthalate (PET) film of a substrate layer, the thickness of the substrate layer is 250 micrometers, and a back coating is the same as that of example 1, so that a common diffusion film is prepared. The technical parameters are shown in table 2 below.
Table 2 technical parameters in the diffusion membrane provided in comparative example 1
Note: the degree of particle exposure is the height of the diffusion particles protruding from the glue layer.
Table 3 main property test results of the diffusion films provided in the examples of the present invention and the comparative examples
The performance test results in table 3 show that the brightness enhancement type diffuser film provided by the invention can improve the brightness gain effect, has a good covering effect, and has excellent interference resolution performance. In particular, examples 8-10 provide the best overall performance of brightness enhancing diffuser films.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the disclosure of the present invention are covered by the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a brightening type diffusion barrier which characterized in that, brightening type diffusion barrier includes the transparent substrate layer, and the transparent substrate layer contains first optical surface and second optical surface, first optical surface is provided with microlens diffusion structural layer, second optical surface is provided with the back coating.
2. The brightness enhancement diffuser film of claim 1, wherein the microlens diffuser structure layer comprises a microlens structure and a glue layer, the microlens structure is bonded to the first optical surface of the transparent substrate layer through the glue layer, and the microlens structure and the glue layer are made of the same material.
3. The brightness enhancing diffuser film of claim 2, wherein the microlens structure and the glue layer are integrally formed during fabrication.
4. The brightness enhancing diffuser film of claim 2, wherein the lenticular features are arcuate raised features.
5. A brightness enhancing diffuser film as recited in claim 4, wherein said curved protruding structures have a width P of 10-100 μm and an aspect ratio of 0.3-0.6.
6. A brightness enhancing diffuser film as recited in claim 5, wherein said curved, raised structures have a width of 25-45 μm and an aspect ratio of 0.4-0.5.
7. The brightness enhancing diffuser film of claim 5, wherein the curved convex structures are selected from hemispherical lenses having a width of 10-100 μm, an aspect ratio of 0.3-0.6, a duty cycle of 60-95%, and a liquid material refractive index of the resin of the curved convex structures is selected from 1.44-1.60.
8. The brightness enhancing diffuser film of claim 7, wherein the hemispherical lenses have a width of 20-60 μm, an aspect ratio of 0.35-0.55, the duty cycle of the curved protrusion structures is 70-95%, and the liquid material refractive index of the curved protrusion structure resin is selected from 1.46-1.56; the transparent substrate is selected from one of polyethylene terephthalate (PET) or Polycarbonate (PC), and the thickness of the transparent substrate is selected from 100-250 μm.
9. The brightness enhancement diffuser film of claim 8, wherein the hemispherical lenses have a width of 25-45 μm, an aspect ratio of 0.4-0.5, the duty cycle of the curved protrusion structures is 85-95%, and the liquid material refractive index of the curved protrusion structure resin is selected from 1.48-1.52; the transparent substrate is selected from one of polyethylene terephthalate (PET), and the thickness of the transparent substrate is selected from 188-.
10. A method of making a brightness enhancing diffuser film as recited in any of claims 1-9, comprising the steps of:
(1) preparing a microstructure substrate: distributing a layer of micro-particles on the surface of a substrate by an autodeposition method, and then depositing glue in the gaps among the particles in a deposition mode;
(2) removing the microstructure particles, and preparing a master plate: coating polymer resin on the microparticle layer on the upper surface of the substrate prepared with the glue deposition layer and the microparticle layer, and curing the polymer resin to form close adhesion with the microparticles; peeling the uppermost layer of polymer resin and the microparticles from the substrate, and leaving the substrate and the glue deposition layer, wherein the upper surface of the glue deposition layer forms a concave microstructure arrangement layer, and the part is the prepared mother film;
(3) preparation of microlens film: the mother film is coated on the outer wall of the production line roller, the seam is bonded through an adhesive tape, glue is coated on the surface of the transparent substrate layer, a glue layer is pressed on the surface of the mother film with the concave microstructures, the glue is solidified, and a micro-lens diffusion structure layer can be formed on the first optical surface of the transparent substrate layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910913141.5A CN111443408A (en) | 2019-09-25 | 2019-09-25 | Brightening diffusion film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910913141.5A CN111443408A (en) | 2019-09-25 | 2019-09-25 | Brightening diffusion film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111443408A true CN111443408A (en) | 2020-07-24 |
Family
ID=71650603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910913141.5A Pending CN111443408A (en) | 2019-09-25 | 2019-09-25 | Brightening diffusion film and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111443408A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504591A (en) * | 2021-07-08 | 2021-10-15 | 江西盛汇光学科技协同创新有限公司 | Diffusion brightening composite optical membrane and preparation method thereof |
| CN114578465A (en) * | 2022-04-08 | 2022-06-03 | 绍兴翔宇绿色包装有限公司 | PET-based diffusion film and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007178792A (en) * | 2005-12-28 | 2007-07-12 | Mitsubishi Rayon Co Ltd | Light diffusing film and compound optical element using the same |
| DE202009012401U1 (en) * | 2008-09-12 | 2009-12-03 | Eternal Chemical Co., Ltd. | Optical film |
| CN102565895A (en) * | 2011-12-28 | 2012-07-11 | 南京理工大学常熟研究院有限公司 | Optical diffusion film and method for preparing same |
| CN104035144A (en) * | 2013-03-08 | 2014-09-10 | 三星电子株式会社 | Film for improving color display and method for manufacturing the same, and display apparatus |
| CN107356993A (en) * | 2017-08-28 | 2017-11-17 | 河南理工大学 | A kind of preparation method of microlens array |
| CN109799553A (en) * | 2018-12-26 | 2019-05-24 | 宁波激智科技股份有限公司 | Preparation method and a kind of lenticule brightness enhancement film of a kind of metal mother and preparation method thereof |
-
2019
- 2019-09-25 CN CN201910913141.5A patent/CN111443408A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007178792A (en) * | 2005-12-28 | 2007-07-12 | Mitsubishi Rayon Co Ltd | Light diffusing film and compound optical element using the same |
| DE202009012401U1 (en) * | 2008-09-12 | 2009-12-03 | Eternal Chemical Co., Ltd. | Optical film |
| CN102565895A (en) * | 2011-12-28 | 2012-07-11 | 南京理工大学常熟研究院有限公司 | Optical diffusion film and method for preparing same |
| CN104035144A (en) * | 2013-03-08 | 2014-09-10 | 三星电子株式会社 | Film for improving color display and method for manufacturing the same, and display apparatus |
| CN107356993A (en) * | 2017-08-28 | 2017-11-17 | 河南理工大学 | A kind of preparation method of microlens array |
| CN109799553A (en) * | 2018-12-26 | 2019-05-24 | 宁波激智科技股份有限公司 | Preparation method and a kind of lenticule brightness enhancement film of a kind of metal mother and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504591A (en) * | 2021-07-08 | 2021-10-15 | 江西盛汇光学科技协同创新有限公司 | Diffusion brightening composite optical membrane and preparation method thereof |
| CN114578465A (en) * | 2022-04-08 | 2022-06-03 | 绍兴翔宇绿色包装有限公司 | PET-based diffusion film and preparation method thereof |
| CN114578465B (en) * | 2022-04-08 | 2022-08-26 | 绍兴翔宇绿色包装有限公司 | PET-based diffusion film and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111443516A (en) | Optical composite film and preparation method thereof | |
| CN103185912B (en) | Microstructure light guide plate and side light type backlight module | |
| CN102681083A (en) | Light guide plate with concave microstructure and manufacturing method thereof | |
| CN101655211A (en) | Light-redirecting article | |
| TWI435120B (en) | Composite optical film | |
| KR102056505B1 (en) | Edge light-type backlight device and light diffusion member | |
| KR20100095765A (en) | Optical sheet | |
| KR20130041337A (en) | Light-diffusing film, light-diffusing film-equipped polarizing plate, lcd device, and lighting apparatus | |
| CN111443408A (en) | Brightening diffusion film and preparation method thereof | |
| JP2007328117A (en) | Lenticular lens sheet and its manufacturing method, transmission type screen, and rear projection type image display device | |
| KR102046200B1 (en) | Edge light-type backlight device and light diffusion member | |
| KR20130041348A (en) | Optical diffusion element | |
| JP6069816B2 (en) | Optical sheet and method for manufacturing the same, EL element using optical sheet, and illumination device including the same | |
| KR101449633B1 (en) | High Brightness and Moire Free Mirco Lens Film and Method of Manufacturing the Mirco Lens Film and Backlight Unit Containing the Mirco Lens Film and Mirco lens Array Apparatus | |
| JP6046733B2 (en) | Antireflection film, method for producing the same, and display device | |
| CN202629914U (en) | Double-sided microstructural optical film | |
| JP3879284B2 (en) | Surface-treated resin plate | |
| CN105867005A (en) | A brightness enhancement film with an anti-electromagnetic wave effect and a method for preparing the same | |
| JP2004145328A (en) | Optical sheet and back light unit using the same | |
| CN202631769U (en) | Optical film with brightening and diffusion functions | |
| KR101209803B1 (en) | Method for manufacturing one body type optical film and one body type optical film | |
| CN100412574C (en) | Method for producing mold for use in duplicating light diffusion sheet, light diffusion sheet and method for producing the same, and screen | |
| JP2004145329A (en) | Optical sheet and back light unit using the same | |
| JP2004077781A (en) | Diffusing film | |
| KR100656896B1 (en) | Surface-functional Light Guiding Plates and Method for Continuous Preparation of the Same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200724 |