CN108693693A - A kind of high contrast transparent projection shows screen and preparation method thereof - Google Patents
A kind of high contrast transparent projection shows screen and preparation method thereof Download PDFInfo
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- CN108693693A CN108693693A CN201810842054.0A CN201810842054A CN108693693A CN 108693693 A CN108693693 A CN 108693693A CN 201810842054 A CN201810842054 A CN 201810842054A CN 108693693 A CN108693693 A CN 108693693A
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/048—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of particles
Abstract
The present invention provides a kind of high contrast transparent projections to show screen and preparation method thereof, and the projection display screen includes imaging layer, light-absorption layer and anti-reflecting layer;The light-absorption layer is between the imaging layer and the anti-reflecting layer.Projection display screen provided by the invention has high contrast, and Soft, foldable can restore completely after being bent, folding, and does not interfere with its display effect.Projection display screen provided by the invention not only can be used for front projection, but also can be used for rear projection;And the projection display screen that the present invention obtains can carry out seamless spliced, constitute the display screen of oversize.
Description
Technical field
The invention belongs to projection device field, it is related to a kind of projection display screen and preparation method thereof, more particularly to a kind of
High contrast transparent projection shows screen and preparation method thereof.
Background technology
Transparent video screen can clearly display image and the observation to screen rear things.It is transparent aobvious
Show that Screen Technology is a fast-developing technology, and is applied to numerous areas.By transparent video screen technology,
Can automobile, fighter plane windshield on show navigation information, instrument board information etc., driver obtains the same of relevant information
When, its observation to front is not interfered with, drive safety can be improved.In conjunction with transparence display technology, moreover it is possible to by common glass
Glass wall, even glasses become the display screen of work or amusement.Transparent video screen common at present can be divided into new line
Show screen, diffusing reflection screen, frequency translation screen and Organic Light Emitting Diode (OLED, organic light-emitting
Diodes) screen.
Wherein, it comes back and shows that screen is the transparent glass using special material, in conjunction with the incident projected light of special angle, throw
Shadow illumination is mapped on glass, is totally reflected, to all be reflected into projected light in observer's eye;Due to being to utilize light reflection
Principle, and reflective viewing screen only accounts for one piece of region of the very little of windshield, leads to the viewing angle of this transparent projection screens
Very little, driver are just being sitting on driver's seat it can be seen that showing image, but slightly offset from position, then can't see display image.Together
When radiation shield and front be an entirety, cause newly to install or replace expensive.Diffusing reflection screen be then to incident light into
Row diffusing reflection, the direction that diffuses is random, to substantially increase the viewing angle of diffuse reflecting screen, but diffuse reflecting screen pair
Light, in order to improve the image display effect of diffusing reflection screen, needs more diffusing reflection particles, provides stronger without selectivity
Diffusing reflection, but this can cause the transparency of diffusing reflection screen to be deteriorated.Frequency translation screen is then to convert ultraviolet or infrared light
For visible light, display brightness is improved, but there is a problem that transformation efficiency is low.Then there is difficult to realize big for OLED display screen
The problem of large-scale production large scale screen, while cost is higher.Just because of there are these, lead to transparent video screen
Using being limited.
Show screen contrast refer to same point on projection screen, be displayed in white picture it is i.e. most bright when brightness and its
Show the ratio of brightness when black picture is most dark.Influence of the contrast to visual effect is very crucial, in general, comparison
Degree is bigger, and the image the clear eye-catching, and the color also the distinct gorgeous, and contrast is smaller, then image can be caused dusky, unclear
It is clear.High contrast shows clarity, the details of image, gray-level performance is all very helpful.From the definition of contrast
It is found that in order to improve the contrast of display screen, a kind of method is to improve the i.e. most bright brightness of screen display white, another kind side
Rule is to reduce the i.e. most dark brightness of screen display black.The most bright brightness of screen display is limited by projector's projection brightness
System, current methods are mostly to reduce the i.e. most dark brightness of screen display black.
For the projection display screen used under intense light conditions, it can reduce by absorbing ambient light and show screen display
The i.e. most dark brightness of black, to improve the contrast of screen.As CN103605258A discloses a kind of environment resistant light projection screen
Curtain, is made of projection imaging layer, grating layer and anti-dazzle photosphere, and the ink layer of multiple parallel intervals is equipped with wherein in grating layer, uses
In absorbing ambient light, interference of the ambient light to imaging is reduced.But its environment resistant light provided shows screen, is needed aobvious
Accurate micro-structure is built on display screen curtain, and coats optical absorbing agent or reflective agent in micro-structure both sides, greatly improves display screen
The cost of curtain is unfavorable for environment resistant light and shows the universal of screen.
Invention content
In order to solve the above technical problem, the present invention provides a kind of projection display screens and preparation method thereof, especially
A kind of high contrast transparent projection is provided and shows screen and preparation method thereof.
To reach the invention purpose, the present invention uses following technical scheme:
On the one hand, the present invention provides a kind of projection display screen, the projection display screen includes imaging layer, light-absorption layer
And anti-reflecting layer;The light-absorption layer is between the imaging layer and the anti-reflecting layer.
High contrast transparent projection provided by the invention shows that the imaging layer of screen can improve transparent projection and show screen
Contrast, and project to the light that scatters after imaging layer and further decrease the brightness of its ambient light into crossing light-absorption layer, then pass through
Anti-reflecting layer is crossed, the reflection of scattering light is reduced, so as to greatly improve the brightness for entering the light of the scattering in observer's eye.
Preferably, the structure sheaf that the imaging layer and the light-absorption layer are made of identical base material.
Preferably, the base material is polyvinyl alcohol.
In the present invention, polyvinyl alcohol is selected to be used as thin polymer film, light transmission rate is up to 95% or more, even if
After imaging nano-particle is added in the polymer, light transmission rate still can reach 80% or more, and polyvinyl alcohol is flexibility
Polymer, obtained thin polymer film can restore completely after being bent, folding, and not interfere with its display effect.And
Polyvinyl alcohol is degradable, not can cause environmental pollution, while the projection display screen that the present invention obtains can carry out seamless spelling
It connects, constitutes the display screen of oversize.
In the present invention, the imaging layer be containing plasmon resonance wavelength be 450nm imaging nano-particle, etc. from
Plasmon resonance wavelength be 560nm imaging nano-particle and plasmon resonance wavelength be 660nm imaging nano-particle it is poly-
Close object film layer.
Incident light is irradiated to imaging nanoparticle surface, causes to be imaged nanoparticle surface free electron collective oscillation, when
When electronics collective oscillation frequency is consistent with incident light frequency, resonance, i.e. plasmon resonance are just will produce, at this time incident laser energy
It is efficiently transferred the kinetic energy for electronics collective oscillation, and a kinetic energy part for electronics collective oscillation can be converted into interior energy, i.e. portion
Light splitting is absorbed by imaging nano-particle;Another part can be radiated in a manner of electromagnetic wave, i.e., part light is dissipated by imaging nano-particle
It penetrates.And it is not converted into the incident light part of the kinetic energy of imaging nano-particle electronics collective oscillation, imaging is penetrated in the form of light to be received
Rice corpuscles, that is, the light penetrated.Imaging nano-particle can all lead to the absorption and scattering of incident light the decrease of incident intensity,
In only scattering light can be observed, in order to improve display screen brightness and contrast, need imaging nanoparticle therein
Son has strong scattering to incident light, and absorbing can ignore relative to scattering.
In resonance wave strong point, imaging nano-particle has strongest absorption and scattering to incident light, so imaging nano-particle
Plasmon resonance wavelength should be consistent with corresponding lambda1-wavelength.And projector is generally laser projection at present, sends out
The projected light gone out is made of three kinds of one-wavelength lasers (red, green, blue).The projected light spectrum schematic diagram of laser-projector as shown in Figure 1,
Three kinds of colors have good monochromaticjty, and the wavelength of blue, green, red three kinds of laser is respectively 450nm, 560nm and 660nm, at
As the plasmon resonance wavelength of nano-particle corresponds, so three kinds of selection is with different plasmon resonance wavelength
It is imaged nano-particle, it is made to be corresponded with 450nm, 560nm, 660nm, Display Contrast is shown to achieve the purpose that improve.
And it is imaged influence of the nano-particle to incident intensity, it can be detected by ultraviolet-uisible spectrophotometer.It is purple
What outside-visible spectrophotometer detected is the decrease of corresponding wavelength incident intensity, that is, the superposition for absorbing and scattering detects light
The most weak wavelength of intensity is the plasmon resonance wavelength for being imaged nano-particle.Pass through theoretical calculation (DDA algorithms, software:
Ddscat 7.3), it can obtain at corresponding wavelength, be imaged absorption and the scattering strength of nano-particle.
Preferably, the imaging nano-particle is Nano silver grain, coated with silica Nano silver grain, silver cladding dioxy
SiClx nano-particle or by the nano-particle of the overlapping 2-6 layer structures formed of silver and silica any one or at least two
The combination of kind, the 2-6 layers of structure can be 2 layers, 3 layers, 4 layers, 5 layers, 6 layers etc..
Preferably, the imaging nano-particle is spheroid form, ellipsoid shape, triangular prism shape or rectangular shape
Any one or at least two combination.
Imaging nano-particle can selectively scatter the incident light of specific wavelength, and the scattering light direction after scattering is random distribution
So that there is projection display screen provided by the invention big viewing angle, viewing angle can reach 180 °, simultaneously because at
Picture nanoparticle sub-light is selectively fine, only scatters the light of corresponding wavelength, that is, the ratio for scattering projected light in light is far above ambient light,
Therefore the contrast that projection display screen can be improved, obtains better display effect.And towards the scattering of observer side
Light can pass through light-absorption layer, further decrease the brightness of its ambient light, then again pass by anti-reflecting layer, reduce scattering light
Reflection improves the brightness for entering the light of the scattering in observer's eye, on the basis of ensureing screen light transmission rate, improve screen
Contrast;And it is imaged nano-particle synthesis simply, dosage is few, can effectively reduce projection display screen cost.Polymer thin
Film can degrade at room temperature, will not cause environmental pollution.Projection display screen provided by the invention both can be used for positive throwing
Shadow, and rear projection can be used for.
In the present invention, the light-absorption layer is containing extinction particle, the absorption light for absorbing optical wavelength in the sections 400-445nm
Wavelength the sections 455-550nm extinction particle, absorb optical wavelength the extinction particle in the sections 570-650nm thin polymer film
Layer, the 400-445nm can be 400nm, 410nm, 420nm, 430nm, 440nm, 445nm etc., and the 455-550nm can be with
455nm, 460nm, 470nm, 490nm, 500nm, 520nm, 540nm etc., the 570-650nm can be 600nm, 620nm,
630nm, 640nm etc..
Extinction particle can select the ambient light for absorbing particular range of wavelengths that can effectively be reduced without influencing projected light
The brightness of ambient light, while the brightness of transmitted light is had little effect, therefore projection display screen can be effectively improved
Contrast.
Preferably, the extinction particle is selected from extinction dyestuff and/or metal class nano-particle.
Preferably, the extinction dyestuff is sunset yellow and/or rhodamine.
Preferably, the shape of the metal class nano-particle is spheroid form, octahedral shape, triangular prism shape or length
Cube shape any one or at least two combination.
In the present invention, metal class nano-particle not only refers to pure metal nanoparticle, also includes metal nano
The new nanostructure that particle is constituted with other materials, such as ground mentioned above silica contracted payment nano-particle.
Preferably, the metal class nano-particle is arbitrary in gold nanoparticle, Nano silver grain or copper nano-particle
It is a kind of or at least two combination.
In the present invention, the anti-reflecting layer is made of layer 2-4 transparent membrane, and the layer 2-4 can be 2 layers, 3 layers or 4
Layer.
When projected light is radiated at the surface of anti-reflecting layer, almost all penetrates, and is seldom reflected, therefore anti-reflecting layer can be with
The reflection to incident light is reduced, the utilization ratio of projected light is effectively improved.
Preferably, the transparent membrane be magnesium fluoride film, silica membrane, calcium-fluoride thin film, magnesia film or
In indium tin oxide target film any one or at least two combination.
Projection display screen provided by the invention not only can be used for front projection, but also can be used for rear projection;The present invention carries
The projection display screen of confession can paste arbitrary even curface, such as simple glass wall, automobile front windshield, be changed into
For working or entertaining the display screen used.
On the other hand, the present invention provides the preparation methods of projection display screen as described above, and the preparation method is such as
Under:
(1) imaging nano-particle is added in polymer solution, stirs evenly, plastic film mulch, removes solvent, obtain imaging layer;
(2) extinction particle is added in polymer solution, stirs evenly, is directly spread on the imaging layer that step (1) obtains
Film removes solvent, obtains imaging layer-light-absorption layer;
(3) anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (2) obtains using resin, wherein anti-reflecting layer
It is pasted onto on light-absorption layer, obtains the projection display screen.
The preparation method of projection display screen as described above provided by the invention is simple for process, utilizes the method
Obtained projection display screen has high contrast, and soft bent.
In the present invention, the solvent of step (1) described polymer solution is ultra-pure water.
Preferably, the method for removing solvent is the drying of 30-45 DEG C of vacuum drying oven or naturally dry, described 30-45 DEG C
It can be 30 DEG C, 32 DEG C, 35 DEG C, 37 DEG C, 40 DEG C, 45 DEG C etc..
In the present invention, the method that solvent is removed described in step (2) is 30-45 DEG C of drying of vacuum drying oven or dries in the air naturally
Dry, described 30-45 DEG C can be 30 DEG C, 32 DEG C, 35 DEG C, 37 DEG C, 40 DEG C, 45 DEG C etc..
In the present invention, step (3) described resin is epoxy resin or polyurethane.
Compared with the existing technology, the invention has the advantages that:
High contrast transparent projection provided by the invention shows that the imaging layer of screen can improve transparent projection and show screen
Contrast, and project to the light that scatters after imaging layer and further decrease the brightness of its ambient light into crossing light-absorption layer, then pass through
Anti-reflecting layer is crossed, the reflection of scattering light is reduced, so as to greatly improve the brightness for entering the light of the scattering in observer's eye, is reduced
The brightness of bias light, and then improve the contrast of screen.
Projection display screen provided by the invention has high contrast, and projection display screen provided by the invention can glue
It is attached to arbitrary even curface, such as simple glass wall, automobile front windshield, is changed into using for working or entertaining
Show screen.Preparation method provided by the invention is simple for process.
Description of the drawings
Fig. 1 is the spectral schematic of the projected light for the laser-projector that the present invention uses.
Fig. 2 is the structural schematic diagram for the projection display screen that embodiment 1 provides;Wherein:1- anti-reflecting layers, 2- light-absorption layers,
3- imaging layers, 4- plasmon resonance wavelength are the spheroid form Nano silver grain of 660nm, and 5- plasmon resonance wavelength is
The spheroid form Nano silver grain of 560nm, 6- plasmon resonance wavelength are the spheroid form Nano silver grain of 450nm, and 7- inhales
The spheroid form Nano silver grain of a length of 610nm of light wave is received, 8- absorbs the spheroid form Nano silver grain of a length of 505nm of light wave,
9- absorbs the spheroid form Nano silver grain of a length of 410nm of light wave.
Fig. 3 A are the extinction spectras for the spheroid form Nano silver grain that plasmon resonance wavelength is 450nm in embodiment 1
Schematic diagram.
Fig. 3 B are the extinction spectras for the spheroid form Nano silver grain that plasmon resonance wavelength is 560nm in embodiment 1
Schematic diagram.
Fig. 3 C are the extinction spectras for the spheroid form Nano silver grain that plasmon resonance wavelength is 660nm in embodiment 1
Schematic diagram.
Fig. 4 is the extinction spectra schematic diagram of three kinds of different extinction particles (spheroid form Nano silver grain) in embodiment 1.
Specific implementation mode
The technical solution further illustrated the present invention below by specific implementation mode.Those skilled in the art should be bright
, the embodiment, which is only to aid in, understands the present invention, should not be regarded as a specific limitation of the invention.
In the following embodiments, experiment material used is unless otherwise specified that conventional biochemical reagent manufacturer buys
It arrives.
Embodiment 1
The structural schematic diagram of projection display screen provided in this embodiment is shown in Fig. 2, projection display screen by imaging layer (3),
Light-absorption layer (2) and anti-reflecting layer (1) composition.
Wherein, imaging layer be containing plasmon resonance wavelength be 450nm imaging nano-particle (6), phasmon it is total
Vibration wave length be 560nm imaging nano-particle (5) and plasmon resonance wavelength be 660nm imaging nano-particle (4) gather
Object film layer is closed, imaging nano-particle is the Nano silver grain of spheroid form.
It is the extinction particle (9) of 410nm that light-absorption layer, which is containing absorption optical wavelength, absorbs the extinction that optical wavelength is 505nm
Grain (8) and absorption optical wavelength are the polymer film layers of the extinction particle (7) of 610nm, and extinction particle is the Yin Na of spheroid form
Rice corpuscles.
Anti-reflecting layer is 2 layers of transparent membrane that calcium-fluoride thin film and indium tin oxide target film form.
It should be noted that the 4-9 for representing spheroid form Nano silver grain in Fig. 2 refers only to different plasmon resonance waves
Long spheroid form Nano silver grain, size puts in order, and not represent the practical big minispread of spheroid form Nano silver grain suitable
Sequence.
Preparation method is as follows:
(1) synthesis of spheroid form Nano silver grain is as follows:
A, Nano silver grain seed is synthesized
Contain 5mM trisodium citrates and 0.025mM tannic acids in 50mL ultra-pure water solutions, under the conditions of condensing reflux, heating
To boiling, 125 μ L 100mM silver nitrate solutions are then quickly added into, keep boiling 15 minutes to get to Nano silver grain seed
Solution.
B, spheroid form Nano silver grain is prepared
Nano silver grain seed solution is cooled to 90 DEG C, trisodium citrate (200 μ L, 25mM), tannic acid is then added
(600 μ L, 2.5mM) and silver nitrate (100 μ L, 100mM) react 30 minutes, take out a small amount of liquid for UV, visible light spectrophotometric
Meter detection.Repeat to be added trisodium citrate (200 μ L, 25mM), tannic acid (600 μ L, 2.5mM) and silver nitrate (100 μ L,
The step for 100mM) reacting 30 minutes, until when the plasmon resonance wavelength of spheroid form Nano silver grain is 450nm,
Stop reaction, solution is cooled to room temperature, and centrifugal concentrating, back dissolving obtains spheroid form Nano silver grain in ultra-pure water water.
The extinction spectra of spheroid form Nano silver grain is monitored using ultraviolet-visible spectrophotometer, Fig. 3 A are sphere
(wherein extinction ratio is E=lg (I to the extinction spectra schematic diagram of shape Nano silver grain0/ I), I0For the intensity of incident light, I is purple
The intensity of the light of outside-visible spectrophotometer detector detection.), during the reaction, when disappearing for spheroid form Nano silver grain
When light spectral peak position is consistent with extinction spectra figure shown in Fig. 3 A, stop reaction.
It is respectively synthesized the spheroid form nano grain of silver that plasmon resonance wavelength is 560nm, 660nm using the above method
Son.Wherein, extinction particle is the spheroid form Nano silver grain for absorbing light wave a length of 410nm, 505nm and 610nm.Fig. 3 B, figure
3C is the extinction spectra schematic diagram of the spheroid form Nano silver grain of different plasmon resonance wavelength, and Fig. 4 is three kinds different
The extinction spectra schematic diagram of extinction particle (spheroid form Nano silver grain).
(2) imaging layer is prepared
The polyvinylalcohol solids of 10g are added in the beaker containing 100mL ultra-pure waters, are stirred overnight at room temperature, then water-bath
Magnetic agitation 5 hours at 90 DEG C, 90 DEG C are heated to, until solid is completely dissolved, obtain poly-vinyl alcohol solution;By plasmon resonance
Wavelength is respectively the imaging nano-particle of 450,560,660nm, is 1 by molar concentration rate:2:4 ratio is added to the poly- of room temperature
It in vinyl alcohol aqueous solution, is uniformly mixed, coats, 40 DEG C of drying of vacuum drying oven obtain imaging layer.
(3) imaging layer-light-absorption layer is prepared
Extinction particle is pressed 1:1:1 ratio is added in the polyvinyl alcohol water solution of room temperature, is uniformly mixed, in step
Suddenly direct plastic film mulch on the imaging layer that (2) obtain, naturally dry obtain imaging layer-light-absorption layer.
(4) projection display screen is prepared
Anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (3) obtains using epoxy resin, wherein antireflection
Layer is pasted onto on light-absorption layer, obtains projection display screen.
Embodiment 2
Projection display screen provided in this embodiment is made of imaging layer, light-absorption layer and anti-reflecting layer.
Wherein, imaging layer is imaging nano-particle, the plasmon resonance wave for being 450nm containing plasmon resonance wavelength
Length be 560nm imaging nano-particle and plasmon resonance wavelength be 660nm imaging nano-particle polymer film layer,
Imaging nano-particle is triangular prism shape Nano silver grain.
Light-absorption layer be containing absorb optical wavelength is 415nm extinction particle, absorb optical wavelength be 500nm extinction particle and
The polymer film layer that optical wavelength is the extinction particle of 605nm is absorbed, extinction particle is the Nano silver grain of spheroid form.
Anti-reflecting layer is 3 layers of transparent membrane of magnesium fluoride film-silica membrane-magnesia film composition.
Preparation method is as follows:
(1) synthesis of triangular prism shape Nano silver grain is as follows:
To 25mL, 1.5mL trisodium citrates (30mM), 1.5mL polyvinylpyrrolidines is added in 0.1mM silver nitrate aqueous solutions
Ketone (0.7mM), 60 μ L hydrogen peroxide (30%), 100-250 μ L sodium borohydrides (100mM), are stirred at room temperature reaction, when it is equal from sharp
First resonant wavelength is located at 450nm and stops reaction, and centrifugal concentrating, back dissolving obtains triangular prism shape Nano silver grain in ultra-pure water.
It is respectively synthesized the triangular prism shape silver nanoparticle that plasmon resonance wavelength is 560nm and 660nm using the above method
Particle, the spheroid form silver that absorption light wave a length of 415nm, 500nm and 605nm are synthesized using the method that embodiment 1 provides are received
Rice corpuscles (extinction particle).
(2) imaging layer is prepared
The polyvinyl alcohol of 10g is added in the beaker containing 100mL ultra-pure waters, is stirred overnight at room temperature, then heating water bath
Magnetic agitation 5 hours, until solid is completely dissolved, obtains poly-vinyl alcohol solution to 90 DEG C, 90 DEG C;By plasmon resonance wavelength
The imaging nano-particle of respectively 450,560,660nm are 1 by molar concentration rate:2:4 ratio is added to the polyethylene of room temperature
It in alcohol solution, is uniformly mixed, coats, naturally dry obtains imaging layer.
(3) imaging layer-light-absorption layer is prepared
Extinction particle is pressed 1:1:1 ratio is added in the polyvinyl alcohol water solution of room temperature, is uniformly mixed, in step
Suddenly direct plastic film mulch on the imaging layer that (2) obtain, naturally dry obtain imaging layer-light-absorption layer.
(4) projection display screen is prepared
Anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (3) obtains using epoxy resin, wherein antireflection
Layer is pasted onto on light-absorption layer, obtains projection display screen.
Embodiment 3
Projection display screen provided in this embodiment is made of imaging layer, light-absorption layer and anti-reflecting layer.
Wherein, imaging layer is imaging nano-particle, the plasmon resonance wave for being 450nm containing plasmon resonance wavelength
Length be 560nm imaging nano-particle and plasmon resonance wavelength be 660nm imaging nano-particle polymer film layer,
It is silver-colored coated silica nano-particle to be imaged nano-particle.
It is 550nm that light-absorption layer, which is containing extinction particle, the plasmon resonance wavelength that plasmon resonance wavelength is 435nm,
Extinction particle and plasmon resonance wavelength be 650nm extinction particle polymer film layer, extinction particle be titanium dioxide
Silicon coats Nano silver grain.
Anti-reflecting layer is that 4 layers of magnesium fluoride film-silica membrane-magnesia film-indium tin oxide target film composition are saturating
Bright film.
Preparation method is as follows:
(1) synthesis of silver-colored coated silica nano-particle is as follows:
A, synthetic silica nanometer bead
4mL tetraethyl orthosilicates and 4mL concentrated ammonia liquors are added in 50mL ethyl alcohol, is stirred overnight at room temperature, centrifuge washing will precipitate
Drying is to get to silica nanometer bead.
B, silver-colored coated silica nano-particle is synthesized
Silica nanometer bead is added in 10% aqueous hydrochloric acid solution containing stannous chloride, stannous chloride pair two is passed through
Silica nanometer bead surface is modified, and keeps its surface positively charged, then into modified silicon oxide pellets solution
Silver nitrate solution is added, chemically reacts:Ag++Sn2+→Ag0+Sn4+, part silver ion is reduced to Nano silver grain, silver-colored
Nanoparticle surface is negatively charged, and by positive and negative charge sucking action, the small club of silver nanoparticle is adsorbed on silica nanometer bead
Surface.
Sodium borohydride is further added, is Nano silver grain by silver ion Restore All, room temperature acts on 6 hours, and centrifugation is washed
It washs three times, transfers it in 90 DEG C of water-baths, trisodium citrate and silver nitrate, during the reaction, silica is added
The silver layer meeting progressive additive on surface, utilizes ultraviolet-uisible spectrophotometer to detect the extent of reaction, plasmon resonance wavelength position
Stop reaction when 450nm, centrifugal concentrating, back dissolving obtains silver-colored coated silica nano-particle in ultra-pure water.
The silver-colored coated silica that plasmon resonance wavelength is 560nm and 660nm is respectively synthesized using the above method to receive
Rice corpuscles.
(2) synthesis of coated with silica Nano silver grain is as follows:
A, synthesizing spherical Nano silver grain
B, synthetic silica coats Nano silver grain
1mL spheroid form Nano silver grains are added in 50mL ethanol solutions, by 1:Positive silicic acid tetrem is added in 1 ratio
Reaction is stirred at room temperature in ester, dimethylamine, stops reaction when its plasmon resonance wavelength is located at 435nm, and centrifuge washing is dried,
Obtain coated with silica Nano silver grain.
The coated with silica silver that plasmon resonance wavelength is 550nm and 650nm is respectively synthesized using the above method to receive
Rice corpuscles.
(3) imaging layer is prepared
The polyvinyl alcohol of 10g is added in the beaker containing 100mL ultra-pure waters, is stirred overnight at room temperature, then heating water bath
Magnetic agitation 5 hours, until solid is completely dissolved, obtains poly-vinyl alcohol solution to 90 DEG C, 90 DEG C;By plasmon resonance wavelength
The imaging nano-particle of respectively 450,560,660nm are 1 by molar concentration rate:2:4 ratio is added to the polyethylene of room temperature
It in alcohol solution, is uniformly mixed, coats, naturally dry obtains imaging layer.
(4) imaging layer-light-absorption layer is prepared
Extinction particle is pressed 1:1:1 ratio is added in the polyvinyl alcohol water solution of room temperature, is uniformly mixed, in step
Suddenly direct plastic film mulch on the imaging layer that (3) obtain, naturally dry obtain imaging layer-light-absorption layer.
(5) projection display screen is prepared
Anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (4) obtains using epoxy resin, wherein antireflection
Layer is pasted onto on light-absorption layer, obtains projection display screen.
Embodiment 4
Projection display screen provided in this embodiment is made of imaging layer, light-absorption layer and anti-reflecting layer.
Wherein, imaging layer is imaging nano-particle, the plasmon resonance wave for being 445nm containing plasmon resonance wavelength
Length be 560nm imaging nano-particle and plasmon resonance wavelength be 660nm imaging nano-particle polymer film layer,
It is silver-colored coated silica nano-particle and triangular prism shape Nano silver grain to be imaged nano-particle.
It is 455nm that light-absorption layer, which is containing extinction particle, the plasmon resonance wavelength that plasmon resonance wavelength is 400nm,
Extinction particle and plasmon resonance wavelength be 565nm extinction particle polymer film layer, extinction particle be triangular prism
The Nano silver grain of mirror shape Nano silver grain and spheroid form.
Anti-reflecting layer is that 4 layers of magnesium fluoride film-silica membrane-magnesia film-indium tin oxide target film composition are saturating
Bright film.
Preparation method is as follows:
(1) imaging layer is prepared
The polyvinyl alcohol of 10g is added in the beaker containing 100mL ultra-pure waters, is stirred overnight at room temperature, then heating water bath
Magnetic agitation 5 hours, until solid is completely dissolved, obtains poly-vinyl alcohol solution to 90 DEG C, 90 DEG C;By plasmon resonance wavelength
The imaging nano-particle of respectively 450,560,660nm are 1 by molar concentration rate:2:4 ratio is added to the polyethylene of room temperature
It in alcohol solution, is uniformly mixed, coats, naturally dry obtains imaging layer.
(2) imaging layer-light-absorption layer is prepared
Extinction particle is pressed 1:1:1 ratio is added in the polyvinyl alcohol water solution of room temperature, is uniformly mixed, in step
Suddenly direct plastic film mulch on the imaging layer that (1) obtains, naturally dry obtain imaging layer-light-absorption layer.
(3) projection display screen is prepared
Anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (2) obtains using epoxy resin, wherein antireflection
Layer is pasted onto on light-absorption layer, obtains projection display screen.
Embodiment 5
Projection display screen provided in this embodiment is made of imaging layer, light-absorption layer and anti-reflecting layer.
Wherein, imaging layer is imaging nano-particle, the plasmon resonance wave for being 445nm containing plasmon resonance wavelength
Length be 560nm imaging nano-particle and plasmon resonance wavelength be 660nm imaging nano-particle polymer film layer,
It is silver-colored coated silica nano-particle and triangular prism shape Nano silver grain to be imaged nano-particle.
It is 555nm that light-absorption layer, which is containing extinction particle, the plasmon resonance wavelength that plasmon resonance wavelength is 445nm,
Extinction particle and plasmon resonance wavelength be 655nm extinction particle polymer film layer, extinction particle be triangular prism
The Nano silver grain of mirror shape Nano silver grain and spheroid form.
Anti-reflecting layer is 3 layers of transparent membrane of magnesium fluoride film-silica membrane-magnesia film composition.
Preparation method is as follows:
(1) imaging layer is prepared
The polyvinyl alcohol of 10g is added in the beaker containing 100mL ultra-pure waters, is stirred overnight at room temperature, then heating water bath
Magnetic agitation 5 hours, until solid is completely dissolved, obtains poly-vinyl alcohol solution to 90 DEG C, 90 DEG C;By plasmon resonance wavelength
The imaging nano-particle of respectively 450,560,660nm are 1 by molar concentration rate:2:4 ratio is added to the polyethylene of room temperature
It in alcohol solution, is uniformly mixed, coats, naturally dry obtains imaging layer.
(2) imaging layer-light-absorption layer is prepared
Extinction particle is pressed 1:1:1 ratio is added in the polyvinyl alcohol water solution of room temperature, is uniformly mixed, in step
Suddenly direct plastic film mulch on the imaging layer that (1) obtains, naturally dry obtain imaging layer-light-absorption layer.
(3) projection display screen is prepared
Anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (2) obtains using epoxy resin, wherein antireflection
Layer is pasted onto on light-absorption layer, obtains projection display screen.
Applicant states that the present invention illustrates that the high contrast transparent projection of the present invention shows screen by above-described embodiment
And preparation method thereof, but the invention is not limited in above-described embodiments, that is, do not mean that the present invention has to rely on above-described embodiment
It could implement.Person of ordinary skill in the field is it will be clearly understood that any improvement in the present invention, to raw material selected by the present invention
Equivalence replacement and the addition of auxiliary element, the selection etc. of concrete mode, all fall within protection scope of the present invention and the open scope
Within.
Claims (10)
1. a kind of projection display screen, which is characterized in that the projection display screen includes imaging layer, light-absorption layer and antireflection
Layer;The light-absorption layer is between the imaging layer and the anti-reflecting layer.
2. projection display screen according to claim 1, which is characterized in that the imaging layer and the light-absorption layer are by identical
Base material constitute structure sheaf;
Preferably, the base material is polyvinyl alcohol.
3. projection display screen according to claim 1 or 2, which is characterized in that the imaging layer is to contain phasmon
The imaging nano-particle and phasmon that imaging nano-particle that resonant wavelength is 450nm, plasmon resonance wavelength are 560nm
Resonant wavelength is the polymer film layer of the imaging nano-particle of 660nm;
Preferably, the imaging nano-particle is Nano silver grain, coated with silica Nano silver grain, silver-colored coated silica
Nano-particle or by the nano-particle of the overlapping 2-6 layer structures formed of silver and silica any one or at least two
Combination;
Preferably, the shape of the imaging nano-particle is spheroid form, ellipsoid shape, triangular prism shape or cuboid
In shape any one or at least two combination.
4. according to the projection display screen described in any one of claim 1-3, which is characterized in that the light-absorption layer be containing
Absorb optical wavelength the sections 400-445nm extinction particle, absorb optical wavelength in the extinction particle in the sections 455-550nm and absorption
Polymer film layer of the optical wavelength in the extinction particle in the sections 570-650nm;
Preferably, the extinction particle is selected from extinction dyestuff and/or metal class nano-particle;
Preferably, the extinction dyestuff is sunset yellow and/or rhodamine.
5. projection display screen according to claim 4, which is characterized in that the shape of the metal class nano-particle is ball
Shape, octahedral shape, triangular prism shape or rectangular shape any one or at least two combination;
Preferably, the metal class nano-particle includes any one in gold nanoparticle, Nano silver grain or copper nano-particle
Kind or at least two combination.
6. projection display screen according to claim 1, which is characterized in that the anti-reflecting layer is by layer 2-4 transparent membrane
Composition;
Preferably, the transparent membrane is magnesium fluoride film, silica membrane, calcium-fluoride thin film, magnesia film or oxidation
In tin indium film any one or at least two combination.
7. the preparation method of the projection display screen according to any one of claim 1-6, which is characterized in that the system
Preparation Method is as follows:
(1) imaging nano-particle is added in polymer solution, stirs evenly, plastic film mulch, removes solvent, obtain imaging layer;
(2) extinction particle is added in polymer solution, is stirred evenly, the direct plastic film mulch on the imaging layer that step (1) obtains is removed
Solvent is removed, imaging layer-light-absorption layer is obtained;
(3) anti-reflecting layer is pasted on imaging layer-light-absorption layer that step (2) obtains using resin, wherein anti-reflecting layer is pasted
On light-absorption layer, the projection display screen is obtained.
8. preparation method according to claim 7, which is characterized in that the solvent of step (1) described polymer solution is super
Pure water;
Preferably, the method for removing solvent is 30-45 DEG C of drying of vacuum drying oven or naturally dry.
9. preparation method according to claim 7 or 8, which is characterized in that described in step (2) remove solvent method be
30-45 DEG C of drying of vacuum drying oven or naturally dry.
10. according to the preparation method described in any one of claim 7-9, which is characterized in that step (3) described resin is ring
Oxygen resin or polyurethane.
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CN111443561A (en) * | 2020-04-15 | 2020-07-24 | 中南大学 | Three-primary-color wavelength selective scattering transparent projection film and projection screen comprising same |
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