CN209086661U - A kind of high contrast transparent projection display screen - Google Patents
A kind of high contrast transparent projection display screen Download PDFInfo
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- CN209086661U CN209086661U CN201821202864.1U CN201821202864U CN209086661U CN 209086661 U CN209086661 U CN 209086661U CN 201821202864 U CN201821202864 U CN 201821202864U CN 209086661 U CN209086661 U CN 209086661U
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Abstract
The utility model provides a kind of high contrast transparent projection display screen, 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 utility model has high contrast, and Soft, foldable, after being bent, being folded, can restore completely, and will not influence its display effect.Projection display screen provided by the utility model not only can be used for front projection, but also can be used for rear projection；And the projection display screen that the utility model obtains can carry out seamless spliced, constitute the display screen of oversize.
Description
Technical field
The utility model belongs to projection device field, is related to a kind of high contrast transparent projection display screen.
Background technique
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, it will not influence its observation to front, 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, the display screen that comes back is that the transparent glass using special material is thrown in conjunction with the incident projected light of special angle
Shadow illumination is mapped on glass, is totally reflected, to projected light is all reflected into observer's eye；Due to being reflected using light
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 are random, so that the viewing angle of diffuse reflecting screen is substantially increased, 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 transparency that will lead to diffusing reflection screen is 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 higher cost.Just because of there are these problems, lead to transparent video screen
Using being limited.
Display 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
Spend bigger, the image the clear eye-catching, and the color also the distinct gorgeous, and contrast is smaller, then it is dusky to will lead to image, 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 screen to be displayed in white i.e. most bright brightness, another kind side
Rule is to reduce screen to show the i.e. most dark brightness of black.Screen shows limit of the most bright brightness by projector's projection brightness
System, current methods are mostly to reduce screen to show the i.e. most dark brightness of black.
For the projection display screen used under intense light conditions, it can reduce display screen by absorbing environment light and show
Black is most dark brightness, 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 wherein equipped in grating layer, uses
In absorbing environment light, interference of the low ambient light to imaging is dropped.But its environment resistant light provided shows screen, is needed aobvious
Accurate micro-structure is constructed on display screen curtain, and coats optical absorbing agent or reflective agent in micro-structure two sides, greatly improves display screen
The cost of curtain is unfavorable for environment resistant light and shows the universal of screen.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provides a kind of high contrast transparent projection display screen.
To reach this purpose of utility model, the utility model uses following technical scheme:
The utility model provides a kind of projection display screen, the projection display screen include 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 utility model shows that the imaging layer of screen can be improved transparent projection and show
The contrast of screen, and the brightness that the light scattered after imaging layer further decreases its ambient light into light-absorption layer excessively is projected to,
Using anti-reflecting layer, the reflection of scattering light is reduced, so as to greatly improve the brightness of the scattering light entered in observer's eye.
Preferably, the structure sheaf that the imaging layer and the light-absorption layer are made of identical substrate, the substrate are poly- second
Enol.
In the present invention, polyvinyl alcohol is selected to use as thin polymer film, light transmission rate is up to 95% or more, even if
After imaging nanoparticle is added in the polymer, light transmission rate still can achieve 80% or more, and polyvinyl alcohol is flexibility
Polymer, obtained thin polymer film can restore completely after being bent, folding, and will not influence 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.
Preferably, the imaging layer is imaging nanoparticle, the phasmon for being 450nm containing plasmon resonance wavelength
Resonant wavelength be 560nm imaging nanoparticle and plasmon resonance wavelength be 660nm imaging nanoparticle polymer
Film layer.
Incident light is irradiated to imaging nanoparticle surface, causes that nanoparticle surface free electron collective oscillation is imaged, when
When electronics collective oscillation frequency is consistent with incident light frequency, resonance, i.e. plasmon resonance will be generated, at this time incident laser energy
It is efficiently transferred the kinetic energy for electronics collective oscillation, and kinetic energy a part of electronics collective oscillation can be converted into interior energy, i.e. portion
Light splitting is absorbed by imaging nanoparticle；Another part can be radiated in a manner of electromagnetic wave, i.e., part light is dissipated by imaging nanoparticle
It penetrates.And it is not converted into the incident light part of the kinetic energy of imaging nanoparticle electronics collective oscillation, imaging is penetrated in the form of light to be received
Rice corpuscles, that is, the light penetrated.Imaging nanoparticle can all lead to the decrease of incident intensity to the absorption and scattering of incident light,
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, nanoparticle, which is imaged, has strongest absorption and scattering to incident light, so imaging nanoparticle
Plasmon resonance wavelength should be consistent with corresponding lambda1-wavelength.And projector is generally laser projection at present, sends out
Projected light 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 nanoparticle corresponds, so three kinds of selection with different plasmon resonance wavelength
Nanoparticle is imaged, corresponds it with 450nm, 560nm, 660nm, to achieve the purpose that improve display Display Contrast.
And influence of the nanoparticle to incident intensity is imaged, it can be detected by ultraviolet-uisible spectrophotometer.It is purple
Outside-visible spectrophotometer detection 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 that nanoparticle is imaged.By theoretical calculation (DDA algorithm, software:
Ddscat 7.3), at available corresponding wavelength, the absorption and scattering strength of nanoparticle is imaged.
Preferably, the imaging nanoparticle is Nano silver grain, coated with silica Nano silver grain or silver cladding two
Any one in silicon oxide nanoparticle.
Preferably, the imaging nanoparticle is the nanoparticle of spheroid form, the nanoparticle of ellipsoid shape, triangle
The nanoparticle of prism shape or the nanoparticle of rectangular shape.
Imaging nanoparticle can selectively scatter the incident light of specific wavelength, and the scattering light direction after scattering is random distribution
, so that projection display screen provided by the utility model has big viewing angle, viewing angle can reach 180 °, while by
It is selectively fine in imaging nanoparticle sub-light, the light of corresponding wavelength is only scattered, i.e., the ratio of projected light is much higher than ring in scattering light
Border light, therefore the contrast of projection display screen can be improved, obtain better display effect.And towards observer side
Light is scattered, light-absorption layer can be passed through, further decrease the brightness of its ambient light, then again pass by anti-reflecting layer, reduce scattering
The reflection of light, improves the brightness of the scattering light entered in observer's eye, to improve on the basis of guaranteeing screen light transmission rate
The contrast of screen.Thin polymer film can degrade at room temperature, not will cause environmental pollution.Projection provided by the utility model
Display screen not only can be used for front projection, but also can be used for rear projection.
In the present invention, the light-absorption layer is the extinction particle containing absorption optical wavelength in the section 400-445nm, suction
Optical wavelength is received in the extinction particle in the section 455-550nm and absorbs optical wavelength in the polymerization of the extinction particle in the section 570-650nm
Object film layer, the 400-445nm can be 400nm, 410nm, 420nm, 430nm, 440nm, 445nm etc., the 455-
550nm can be 460nm, 470nm, 490nm, 500nm, 520nm, 540nm etc., the 570-650nm can be 600nm,
620nm, 630nm, 640nm etc..
Extinction particle can choose the environment light for absorbing particular range of wavelengths, without influencing projected light, can be effectively reduced
The brightness of environment 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 or metal class nanoparticle.
Preferably, the extinction dyestuff is sunset yellow or rhodamine.
Preferably, the shape of the metal class nanoparticle is the nanometer of the nanoparticle of spheroid form, octahedral shape
The nanoparticle of particle, the nanoparticle of triangular prism shape or rectangular shape.
In the present invention, metal class nanoparticle not only refers to pure metal nanoparticle, also includes metal nano
The new nanostructure that particle and other materials are constituted, such as ground mentioned above silica contracted payment nanoparticle.
Preferably, the metal class nanoparticle is gold nanoparticle, Nano silver grain or copper nano-particle.
In the present invention, the anti-reflecting layer is made of layer 2-4 transparent membrane, and the transparent membrane is that magnesium fluoride is thin
Any one in film, silica membrane, calcium-fluoride thin film, magnesia film or indium tin oxide target film；The layer 2-4 can be with
It is 2 layers, 3 layers or 4 layers.
When projected light is radiated at the surface of anti-reflecting layer, almost all is penetrated, and is seldom reflected, therefore anti-reflecting layer can be with
The reflection to incident light is reduced, the utilization efficiency of projected light is effectively improved.
Projection display screen as described above the preparation method is as follows:
(1) imaging nanoparticle 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 on light-absorption layer, obtains the projection display screen.
Preferably, the solvent of step (1) described polymer solution is ultrapure water.
Preferably, it is described remove solvent method be 30-45 DEG C of vacuum drying oven drying 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..
Preferably, the method that solvent is removed described in step (2) is 30-45 DEG C of vacuum drying oven drying or naturally dry, institute
Stating 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..
Preferably, step (3) resin is epoxy resin or polyurethane.
Compared with the existing technology, the utility model has the following beneficial effects:
High contrast transparent projection provided by the invention shows that the imaging layer of screen can be improved 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 of the scattering light entered in observer's eye, in turn
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 any even curface, such as simple glass wall, automobile front windshield, is changed into for working or entertaining and use
Show screen.Preparation method provided by the invention is simple for process.
Detailed description of the invention
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 layer, 2- light-absorption layer,
3- imaging layer, 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,
The spheroid form Nano silver grain of the 9- absorption a length of 410nm of light wave.
Fig. 3 A is the extinction spectra for the spheroid form Nano silver grain that plasmon resonance wavelength is 450nm in embodiment 1
Schematic diagram.
Fig. 3 B is the extinction spectra for the spheroid form Nano silver grain that plasmon resonance wavelength is 560nm in embodiment 1
Schematic diagram.
Fig. 3 C is the extinction spectra 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 embodiment
The technical solution of the utility model is further illustrated below by specific embodiment.Those skilled in the art answer
This is illustrated, and the embodiment, which is only to aid in, understands the utility model, is not construed as the concrete restriction to the utility model.
In the following embodiments, experimental material used is unless otherwise specified that conventional biochemical reagent manufacturer is bought
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 nanoparticle (6), phasmon it is total
Vibration wave length be 560nm imaging nanoparticle (5) and plasmon resonance wavelength be 660nm imaging nanoparticle (4) it is poly-
Object film layer is closed, imaging nanoparticle 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.
The 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 citrate and 0.025mM tannic acid in 50mL ultra-pure water solution, 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 Nano silver grain seed is arrived
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 ultrapure water water.
The extinction spectra of spheroid form Nano silver grain is monitored using ultraviolet-visible spectrophotometer, Fig. 3 A is sphere
The extinction spectra schematic diagram of shape Nano silver grain, during the reaction, when the extinction spectra peak of spheroid form Nano silver grain
When position is consistent with extinction spectra figure shown in Fig. 3 A, stop reaction.
The spheroid form nano grain of silver that plasmon resonance wavelength is 560nm, 660nm is respectively synthesized 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 ultrapure water, are stirred overnight at room temperature, then water-bath
90 DEG C are heated to, magnetic agitation 5 hours obtain poly-vinyl alcohol solution until solid is completely dissolved at 90 DEG C；By plasmon resonance
Wavelength is respectively the imaging nanoparticle of 450,560,660nm, is added to the poly- of room temperature in the ratio that molar concentration rate is 1:2:4
It in vinyl alcohol aqueous solution, is uniformly mixed, coats, 40 DEG C of vacuum drying oven drying obtain imaging layer.
(3) imaging layer-light-absorption layer is prepared
Extinction particle is added in the polyvinyl alcohol water solution of room temperature in the ratio of 1:1:1, 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 on light-absorption layer, obtains projection display screen.
The Applicant declares that the utility model illustrates the high contrast transparent projection of the utility model through the foregoing embodiment
Show screen, but the utility model is not limited to above-described embodiment, that is, does not mean that the utility model must rely on above-mentioned reality
Applying example could implement.It should be clear to those skilled in the art, under the conditions of without departing from the design of the utility model, with
Upper each component can be replaced with the similar or equivalent technique that technical field personnel understand.
Claims (3)
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
Substrate constitute structure sheaf, the substrate be polyvinyl alcohol.
3. projection display screen according to claim 1, which is characterized in that the anti-reflecting layer is by layer 2-4 transparent membrane
Composition, the transparent membrane are that magnesium fluoride film, silica membrane, calcium-fluoride thin film, magnesia film or indium tin oxide target are thin
Any one in film.
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| CN201821202864.1U CN209086661U (en) | 2018-07-27 | 2018-07-27 | A kind of high contrast transparent projection display screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693693A (en) * | 2018-07-27 | 2018-10-23 | 江苏坦能纳米材料科技有限公司 | A kind of high contrast transparent projection shows screen and preparation method thereof |
| CN111273386A (en) * | 2020-04-03 | 2020-06-12 | 深圳市光科全息技术有限公司 | Optical film |
| 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 |
| CN111929975A (en) * | 2020-08-11 | 2020-11-13 | 成都菲斯特科技有限公司 | Optical projection screen and projection system |
-
2018
- 2018-07-27 CN CN201821202864.1U patent/CN209086661U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693693A (en) * | 2018-07-27 | 2018-10-23 | 江苏坦能纳米材料科技有限公司 | A kind of high contrast transparent projection shows screen and preparation method thereof |
| CN111273386A (en) * | 2020-04-03 | 2020-06-12 | 深圳市光科全息技术有限公司 | Optical film |
| 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 |
| CN111929975A (en) * | 2020-08-11 | 2020-11-13 | 成都菲斯特科技有限公司 | Optical projection screen and projection system |
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