CN109375302B - Diffusion film and application thereof - Google Patents
Diffusion film and application thereof Download PDFInfo
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- CN109375302B CN109375302B CN201811510839.4A CN201811510839A CN109375302B CN 109375302 B CN109375302 B CN 109375302B CN 201811510839 A CN201811510839 A CN 201811510839A CN 109375302 B CN109375302 B CN 109375302B
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- 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
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- Optics & Photonics (AREA)
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- Manufacturing & Machinery (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the field of optical films, in particular to a novel optical diffusion film suitable for ink printing and a preparation method thereof. The invention provides a diffusion film and a preparation method thereof, aiming at solving the problem that the existing diffusion film is poor in adhesion between the diffusion film and an ink coating after printing ink. The diffusion film comprises a transparent substrate, a diffusion coating and a protective coating; the diffusion coating and the protective coating are respectively positioned on the upper surface and the lower surface of the transparent substrate. The diffusion coating comprises diffusing porous particles. The protective coating comprises anti-blocking porous particles. The diffusion film suitable for ink printing provided by the invention has excellent diffusion effect, covering property and optical property, and meanwhile, the porous particles are added in the diffusion film coating, so that the specific surface area of the coating is greatly increased, the surface tension of the coating is further increased, the problem of poor adhesion of the coating after ink printing is obviously solved, and the preparation method is simple in process and easy to operate.
Description
Technical Field
The invention relates to the field of optical films, in particular to a diffusion film suitable for ink printing and application thereof.
Background
In recent years, with the rising of liquid crystal display technologies such as tablet computers, notebook computers, and televisions, consumer demands for light weight, thin profile, and large-size display have become increasingly popular. Therefore, the backlight module, which is an important component of the optical system in the display device, increasingly adopts the edge-type structure. The side-type backlight module is generally configured by a reflective film, an LED light bar, a light guide plate, a diffusion film, a brightness enhancement film, and the like. The LED lamp strip as the liquid crystal display light source comprises a plurality of lamp beads, the light emitting angle of each lamp bead is large, light rays among different lamp beads can be mutually crossed and overlapped, and the phenomenon of uneven light and shade is caused. In order to ensure that a display picture is free of defects, ink is coated on the surface of a diffusion film to cover the defects in the prior art, and the method is widely used due to the advantages of low cost, easiness in operation and the like. However, in the preparation process of the diffusion film, auxiliaries such as a dispersing agent, a leveling agent and a wetting agent are often added to improve the film surface, and the auxiliaries often contain silicon elements, so that the surface tension of the material can be reduced after the silicon elements migrate to the surface of the coating, and a series of problems such as poor adhesion after printing ink printing are caused.
In order to solve the above problems, the addition of large particles has been used in the industry to increase the roughness of the coating and further increase the surface tension of the coating, so as to facilitate the printing of ink on the surface of the coating. Therefore, the development of a diffusion film which can meet the requirements of different ink printing modes and does not influence the material performance is the development direction in the field.
Disclosure of Invention
The invention provides a diffusion film and application thereof, and aims to solve the problem that the existing diffusion film is poor in adhesion between the diffusion film and an ink coating after printing ink. The diffusion film suitable for ink printing provided by the invention has excellent diffusion effect, covering property and optical property, and meanwhile, the porous particles are added in the diffusion film coating, so that the specific surface area of the coating is greatly increased, the surface tension of the coating is further increased, the problem of poor adhesion of the coating after ink printing is obviously solved, and the preparation method is simple in process and easy to operate.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a diffusion film which sequentially comprises a diffusion coating, a transparent substrate and a protective coating.
The invention provides a diffusion film, which comprises a transparent substrate, a diffusion coating and a protective coating; the diffusion coating and the protective coating are respectively positioned on the upper surface and the lower surface of the transparent substrate.
Further, the diffusion coating comprises diffusing porous particles.
Further, the protective coating comprises anti-blocking porous particles.
The diffusion film is suitable for ink printing.
Further, the diffusion coating comprises an adhesive and diffusion porous particles, and the diffusion porous particles are bonded on one surface of the transparent substrate through the adhesive.
Further, the protective coating comprises an adhesive and anti-adhesive porous particles, and the anti-adhesive porous particles are bonded on the other surface of the transparent substrate through the adhesive.
The particle size of the diffusion porous particles is 3-45 μm, and the particle size of the anti-adhesion porous particles is 1-20 μm.
Further, the transparent substrate is selected from one of polyethylene terephthalate (PET), Polycarbonate (PC), polymethyl methacrylate (PMMA), Polyethylene (PE), Polystyrene (PS), and polyamide resin (PA). Further, the transparent substrate is selected from the group consisting of ethylene terephthalate.
Further, the thickness of the transparent substrate is 25-400 μm. Further, the thickness of the transparent substrate is 60-80 μm, 90-160 μm or 180-300 μm. Further, the thickness of the transparent substrate is 100-400 μm. Further, the thickness of the transparent substrate is 250 μm.
Further, the diffusion coating layer comprises 100 parts by mass of a binder and 30-150 parts by mass of diffusion porous particles. Further, the diffusion coating layer comprises 100 parts by mass of a binder and 90-120 parts by mass of diffusion porous particles. Further, the diffusion coating layer includes 100 parts by mass of a binder and 90 parts by mass of diffusion porous particles.
The diffusion porous particles are surface porous particles having a diffusion function.
Further, the adhesive in the diffusion coating is selected from one of polyurethane resin, polyacrylic resin, epoxy resin, polyvinyl acetate or urea-formaldehyde resin. Further, the adhesive is selected from polyurethane resin or polyacrylic resin. Further, the adhesive is selected from polyurethane resin. Further, the material of the diffusion particles is selected from one or a combination of at least two of polymethyl methacrylate, polybutyl methacrylate, polystyrene, polyamide resin, polysiloxane resin or polyurethane. Further, the material of the diffusion particles is selected from one or a combination of at least two of polymethyl methacrylate, polybutyl methacrylate and polystyrene. Further, the material of the diffusion particles is selected from polystyrene.
Further, the particle diameter of the diffusion porous particle is 3 to 45 μm. Further, the particle diameter of the diffusion porous particle is 15 to 35 μm. Further, the particle diameter of the diffusion porous particle is 15 to 20 μm.
Further, the protective coating comprises 100 parts by mass of a sizing agent and 0.5-5 parts by mass of anti-blocking porous particles. Further, the protective coating comprises 100 parts by mass of a sizing agent and 2-4 parts by mass of anti-blocking porous particles. Further, the protective coating comprises 100 parts by mass of a sizing agent and 2 parts by mass of anti-blocking porous particles.
Further, the anti-blocking porous particles have a particle size of 1 to 20 μm. Further, the anti-blocking porous particles have a particle size of 5 to 15 μm. Further, the anti-blocking porous particles have a particle size of 7 μm.
The anti-blocking porous particles are surface porous particles with an anti-sticking function.
Further, the adhesive in the protective coating is selected from one of polyurethane resin, polyacrylic resin, epoxy resin, polyvinyl acetate or urea-formaldehyde resin. Further, the adhesive is selected from polyurethane resin or polyacrylic resin. Further, the adhesive is selected from polyurethane resin. Further, the material of the anti-blocking porous particles is selected from one or a combination of at least two of polymethyl methacrylate, polybutyl methacrylate, polyamide resin, polysiloxane resin or polyurethane. Further, the anti-blocking porous particles are selected from one or a combination of at least two of polybutylmethacrylate, polyamide resin or polyurethane. Further, the anti-blocking porous particles are selected from polyurethanes.
Furthermore, the diffusion coating and the protective coating contain an auxiliary agent. The auxiliary agent is selected from one or the combination of at least two of an antistatic agent, a leveling agent, a dispersing agent, a slipping agent or a wetting agent. The addition amount of the auxiliary agent is 0.5-5% of the weight of the adhesive layer.
Further, the diffusion coating comprises 100 parts by mass of a binder and 30-150 parts by mass of diffusion porous particles; the particle size of the diffusion porous particles is 3-45 μm; the protective coating comprises 100 parts by mass of an adhesive and 0.5-5 parts by mass of anti-adhesion porous particles, wherein the particle size of the anti-adhesion porous particles is 1-20 mu m.
Further, the diffusion coating comprises 100 parts by mass of a binder and 90-150 parts by mass of diffusion porous particles; the particle size of the diffusion porous particles is 15-35 mu m, and the adhesive is selected from polyurethane resin or polyacrylic resin; the protective coating comprises 100 parts by mass of adhesive and 2-4 parts by mass of anti-blocking porous particles, the particle size of the anti-blocking porous particles is 5-15 mu m, and the anti-blocking porous particles are selected from polybutylmethacrylate, polyamide resin or polyurethane.
The diffusion membrane is used for ink printing.
Further, the surface of the diffusion coating of the diffusion film is printed with an ink layer.
Further, the surface of the protective coating of the diffusion film is printed with an ink layer.
The invention also provides a preparation method of the diffusion film suitable for printing ink printing, which comprises the following steps:
(1) preparing a diffusion coating liquid: sequentially adding the adhesive and the diffusion porous particles in sequence, uniformly stirring, adding a proper amount of solvent, and adjusting the viscosity of the coating solution to be suitable for a coating process;
(2) preparing a diffusion coating: coating the coating liquid prepared in the step (1) on one surface of a transparent substrate, and placing the transparent substrate in an oven for aging at 80-120 ℃ for 2-8 hours;
(3) preparing a protective coating liquid: sequentially adding the adhesive and the anti-blocking porous particles in sequence, uniformly stirring, adding a proper amount of solvent, and adjusting the viscosity of the coating solution to be suitable for a coating process;
(4) preparing a protective coating: coating the coating liquid prepared in the step (3) on the other surface of the transparent base material, and placing the transparent base material in an oven for aging at 80-120 ℃ for 2-8 hours;
further, a solvent may be added to the diffusion coating and the protective coating liquid to adjust viscosity to be suitable for a coating process. The solvent is selected from one or the combination of at least two of ethyl acetate, butyl acetate, butanone or cyclohexanone.
Furthermore, an auxiliary agent can be added into the diffusion coating and the protective coating liquid to improve the performance of the coating.
Compared with the prior art, the diffusion film suitable for printing ink provided by the invention has excellent diffusion effect, covering property and optical property, meanwhile, the specific surface area of the coating is greatly increased due to the addition of porous particles in the diffusion film coating, so that the surface tension of the coating is increased, the problem of poor adhesion of the coating after printing ink is obviously solved, and the preparation method is simple in process and easy to operate.
Drawings
FIG. 1 is a schematic structural diagram of a diffusion film suitable for ink printing provided by the present invention;
wherein 101 is a transparent substrate, 102 is a diffusion coating, 103 is a protective coating, 104 is a diffusion porous particle, 105 is an anti-blocking porous particle.
The specific implementation mode is as follows:
as shown in fig. 1, the diffusion film provided by the present invention comprises a transparent substrate 101, wherein a diffusion coating 102 is disposed on the upper surface of the transparent substrate 101, a protective coating 103 is disposed on the lower surface of the transparent substrate 101, the diffusion coating 102 contains diffusion porous particles 104, and the protective coating 103 contains anti-blocking porous particles 105.
The optical properties and ink adhesion properties of the ink-printed diffusion films provided by the present invention were tested as follows.
1. Light transmittance or haze test: a diffusion film to be tested with the size of A4 is taken and put into a haze tester to measure the light transmittance and the haze value.
2. And (3) testing the brightness: a diffusion film to be tested with the size of A4 is taken and placed into a backlight module according to a test framework, the backlight module is lightened under the voltage of 24V, and the brightness of the diffusion film is tested by a luminance instrument.
3. And (3) testing the adhesive force of the printing ink: a diffusion film to be tested with the size of A4 is taken, ink is coated on both sides of the diffusion film in a screen printing mode, and then the adhesion is tested in a hundred-grid mode. The adhesion test results are 5 grades, and are divided into 1B-5B, wherein 1B is the worst, and 5B is the best.
Example 1
The invention provides a diffusion film, which comprises a transparent substrate, a diffusion coating and a protective coating; the diffusion coating and the protective coating are respectively positioned on the upper surface and the lower surface of the transparent substrate. The transparent substrate is polyethylene terephthalate, and the thickness of the transparent substrate is 25 um; the diffusion coating comprises: 100 parts by mass of polyacrylic resin adhesive, 30 parts by mass of diffusion porous particles with the particle size of 3um, wherein the diffusion porous particles are polymethyl methacrylate; the protective coating comprises: 100 parts by mass of polyurethane adhesive, 0.5 part by mass of anti-blocking porous particles with the particle diameter of 1um, wherein the anti-blocking porous particles are polymethyl methacrylate.
Example 2
The diffusion membrane as provided in example 1 wherein the transparent substrate is polyethylene, the transparent substrate having a thickness of 75 μm; the diffusion coating comprises: 100 parts by mass of polyurethane adhesive, 50 parts by mass of diffusion porous particles with the particle diameter of 10 mu m, wherein the diffusion porous particles are polymethyl methacrylate; the protective coating comprises: 100 parts by mass of polyurethane adhesive, and 1 part by mass of anti-blocking porous particles with the particle size of 3 mu m, wherein the anti-blocking porous particles are polybutylmethacrylate.
Example 3
The diffusion membrane as provided in example 1 wherein the transparent substrate is polycarbonate and the transparent substrate has a thickness of 80 μm; the diffusion coating comprises: 100 parts by mass of polyurethane adhesive, 100 parts by mass of diffusion porous particles with the particle diameter of 15 mu m, wherein the diffusion porous particles are polymethyl methacrylate; the protective coating comprises: 100 parts by mass of polyacrylic resin adhesive, and 2 parts by mass of anti-blocking porous particles with the particle size of 5 mu m, wherein the anti-blocking porous particles are polyamide resin.
Example 4
The diffusion membrane provided in example 1 wherein the transparent substrate is polyethylene terephthalate and the thickness of the transparent substrate is 100 μm; the diffusion coating comprises: 100 parts by mass of polyurethane adhesive, 120 parts by mass of diffusing porous particles with the particle diameter of 20 mu m, wherein the diffusing porous particles are polyamide resin; the protective coating comprises: 100 parts by mass of polyurethane adhesive, and 3 parts by mass of anti-blocking porous particles with the particle size of 10 mu m, wherein the anti-blocking porous particles are polybutylmethacrylate.
Example 5
The diffusion membrane provided in example 1 wherein the transparent substrate is polyethylene and the thickness of the transparent substrate is 150 μm; the diffusion coating comprises: 100 parts by mass of a polyacrylic resin adhesive, and 150 parts by mass of diffusing porous particles with the particle size of 30 mu m, wherein the diffusing porous particles are polybutylmethacrylate; the protective coating comprises: 100 parts by mass of polyurethane adhesive, 4 parts by mass of anti-blocking porous particles with the particle diameter of 15 mu m, wherein the anti-blocking porous particles are polyamide resin.
Example 6
The diffusion membrane as provided in example 1 wherein the transparent substrate is polycarbonate and the transparent substrate has a thickness of 180 μm; the diffusion coating comprises: 100 parts by mass of polyurethane adhesive, 80 parts by mass of diffusion porous particles with the particle diameter of 45 mu m, wherein the diffusion porous particles are polyethylene; the protective coating comprises: 100 parts by mass of polyurethane adhesive, and 5 parts by mass of anti-blocking porous particles with the particle size of 20 mu m, wherein the anti-blocking porous particles are polybutylmethacrylate.
Example 7
The diffusion membrane provided in example 1 wherein the transparent substrate is polymethylmethacrylate and the thickness of the transparent substrate is 188 μm; the diffusion coating comprises: 100 parts by mass of a polyacrylic resin adhesive, 100 parts by mass of diffusing porous particles with the particle size of 30 mu m, wherein the diffusing porous particles are polymethyl methacrylate; the protective coating comprises: 100 parts by mass of polyacrylate resin adhesive, and 1 part by mass of anti-blocking porous particles with the particle size of 3 mu m, wherein the anti-blocking porous particles are polyamide resin.
Example 8
The diffusion membrane provided in example 1 wherein the transparent substrate is polyethylene terephthalate and the transparent substrate has a thickness of 250 μm; the diffusion coating comprises: 100 parts by mass of polyurethane adhesive, 90 parts by mass of diffusion porous particles with the particle diameter of 15-20 mu m, wherein the diffusion porous particles are polystyrene; the protective coating comprises: 100 parts by mass of polyurethane adhesive, and 2 parts by mass of anti-blocking porous particles with the particle size of 7 mu m, wherein the anti-blocking porous particles are polyurethane.
Example 9
The diffusion membrane as provided in example 1 wherein the transparent substrate is polycarbonate and the thickness of the transparent substrate is 300 μm; the diffusion coating comprises: 100 parts by mass of polyvinyl acetate adhesive, 120 parts by mass of diffusion porous particles with the particle diameter of 25 mu m, wherein the diffusion porous particles are polybutylmethacrylate; the protective coating comprises: 100 parts by mass of polyurethane adhesive, and 3 parts by mass of anti-blocking porous particles with the particle size of 10 mu m, wherein the anti-blocking porous particles are polymethyl methacrylate.
Example 10
The diffusion membrane provided in example 1 wherein the transparent substrate is polyethylene terephthalate and the transparent substrate has a thickness of 400 μm; the diffusion coating comprises: 100 parts by mass of a polyacrylic resin adhesive, 100 parts by mass of diffusing porous particles with the particle size of 30 mu m, wherein the diffusing porous particles are polymethyl methacrylate; the protective coating comprises: 100 parts by mass of polyurethane adhesive, and 2 parts by mass of anti-blocking porous particles with the particle size of 15 mu m, wherein the anti-blocking porous particles are polyamide resin.
Example 11
The diffusion membrane provided in example 1 wherein the transparent substrate is polyethylene terephthalate and the thickness of the transparent substrate is 100 μm; the diffusion coating comprises: 100 parts by mass of polyurethane adhesive, and 90 parts by mass of diffusion porous particles with the particle size of 35 mu m, wherein the diffusion porous particles are polymethyl methacrylate; the protective coating comprises: 100 parts by mass of polyacrylic resin adhesive, and 3 parts by mass of anti-adhesion porous particles with the particle size of 5 mu m, wherein the anti-adhesion porous particles are polybutylmethacrylate.
Example 12
The diffusion membrane of embodiment 1 wherein the transparent substrate is polycarbonate and the transparent substrate has a thickness of 150 μm; the diffusion coating comprises: 100 parts by mass of a polyacrylic resin adhesive, 100 parts by mass of diffusing porous particles with the particle size of 15 mu m, wherein the diffusing porous particles are polybutylmethacrylate; the protective coating comprises: 100 parts by mass of polyurethane adhesive, 1 part by mass of anti-blocking porous particles with the particle diameter of 5 mu m, wherein the anti-blocking porous particles are polyamide resin.
Comparative example 1
A diffusion membrane: selecting a 188-micron-thickness polyethylene terephthalate substrate; coating a diffusion layer on the upper surface of the base material, wherein the diffusion layer comprises 100 parts by mass of polyurethane adhesive and 90 parts by mass of polymethyl methacrylate particles (not porous particles) with the particle diameter of 5-30 mu m; the lower surface of the substrate is coated with a protective coating comprising 100 parts by mass of a polyurethane adhesive and 0.5 parts by mass of 5-15 μm polymethylmethacrylate particles (not porous particles).
Table 1: performance test results of the diffusion membranes provided in examples 1 to 12 of the present invention and comparative example 1
As can be seen from the test results in table 1, the diffusion film suitable for ink printing provided by the present invention not only has excellent hiding property and brightness, but also has good adhesion to ink after ink printing. Wherein, example 45, 8, 10 and 11, the diffusion film has higher covering property and brightness, higher adhesive force with ink and better comprehensive performance, the light transmittance is greater than or equal to 84.66%, the haze is greater than or equal to 90.69%, and the brightness is greater than or equal to 2598cd/m2The adhesive force of the diffusion layer, the protective layer and the ink layer is 5B. In particular, example 8 provides the best overall diffusion membrane performance
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 (5)
1. The diffusion film is characterized by comprising a diffusion coating, a transparent substrate and a protective coating in sequence; the diffusion coating comprises diffusion porous particles, and the diffusion porous particles are surface porous particles with a diffusion function; the protective coating comprises anti-blocking porous particles, which are surface porous particles with anti-sticking function; the diffusion coating comprises 100 parts by mass of an adhesive and 90-150 parts by mass of diffusion porous particles; the particle size of the diffusion porous particles is 15-35 mu m, and the adhesive is selected from polyurethane resin or polyacrylic resin; the protective coating comprises 100 parts by mass of adhesive and 2-4 parts by mass of anti-blocking porous particles, the particle size of the anti-blocking porous particles is 5-15 mu m, and the anti-blocking porous particles are selected from polybutylmethacrylate, polyamide resin or polyurethane; the thickness of the transparent substrate is 100-400 μm.
2. The diffusion membrane of claim 1, wherein the diffusion coating comprises an adhesive and diffusion porous particles bonded to one surface of the transparent substrate by the adhesive.
3. The diffuser film of claim 2, wherein the protective coating comprises an adhesive and anti-adhesive porous particles bonded to the other surface of the transparent substrate by the adhesive.
4. The diffuser film of claim 1, wherein a surface of the diffuser coating is printed with an ink layer and a surface of the protective coating is printed with an ink layer.
5. Use of a diffusion membrane according to claim 1 for ink printing.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064138A (en) * | 2012-12-28 | 2013-04-24 | 深圳大学 | Light diffusion materials and preparation method thereof |
| CN107831560A (en) * | 2017-11-30 | 2018-03-23 | 宁波激智科技股份有限公司 | A kind of Pasting type optical diffusion and preparation method thereof |
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| CN1019371B (en) * | 1990-05-26 | 1992-12-09 | 陈世杰 | Glass picture technology by direct offset printing |
| JP2009069404A (en) * | 2007-09-12 | 2009-04-02 | Toppan Printing Co Ltd | Optical sheet, backlight unit using same, and display device |
| TWI473318B (en) * | 2011-08-25 | 2015-02-11 | Ind Tech Res Inst | Optical film and light emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103064138A (en) * | 2012-12-28 | 2013-04-24 | 深圳大学 | Light diffusion materials and preparation method thereof |
| CN107831560A (en) * | 2017-11-30 | 2018-03-23 | 宁波激智科技股份有限公司 | A kind of Pasting type optical diffusion and preparation method thereof |
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