CN100489653C - Screen and its manufacturing method - Google Patents
Screen and its manufacturing method Download PDFInfo
- Publication number
- CN100489653C CN100489653C CN 200480000694 CN200480000694A CN100489653C CN 100489653 C CN100489653 C CN 100489653C CN 200480000694 CN200480000694 CN 200480000694 CN 200480000694 A CN200480000694 A CN 200480000694A CN 100489653 C CN100489653 C CN 100489653C
- Authority
- CN
- China
- Prior art keywords
- thin film
- multilayer film
- screen
- light
- optical thin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A screen achieving high contrast and high gain and a method for producing a screen, which is favorable in mass-productivity, are provided. The screen has an optical multilayer film, which has a high reflection property with respect to light in a specific wavelength region and a high transmission property with respect to at least visible light in wavelength regions other than the specific wavelength region. The optical multilayer film has a stacked structure in which a first optical film (12H) having a high refractive index and a second optical film (12L) having a lower refractive index than that of said first optical film are alternately stacked on both surfaces of a transparent base (11) by coating, and the outermost layer of the optical multilayer film is formed by the first optical film, the optical multilayer film being comprised of (2n+1) layers (where n is an integer of 1 or more).
Description
Technical field
The present invention relates to a kind of screen and preparation method thereof.
Background technology
In recent years, as the means of briefing materials such as meeting speechmaker, use overhead projector and slide projector widely.And, adopt the home video projector and the live image film projector of liquid crystal universal day by day.The projecting method that adopts in these projector is, the light that from light source, is sent by the light valve modulation, forming image light, and by optical system such as lens, with the image light transmission on screen.
Such projector comprises the projector that allows color display, and its lamp that adopts emission white light (comprising three primary colors promptly red (R), green (G), blue (B) coloured light) is as light source, and employing transmittance liquid crystal panel is as light valve.In this projector, the illuminated optical system of sending from light source of white light resolves into the light of red light, green light and blue light, and each light converges at predetermined light path.These luminous fluxes are spatially modulated according to picture signal by liquid crystal panel, and the luminous flux after the modulation divides by light mixing and mixes, form coloured image light, and amplify the coloured image light mixed by means of projecting lens, and it is incident upon on the screen, makes the observer can on screen, see image.
In addition, as projector that can color display, develop recently and adopt arrowband three primary colors light source as light source (for example launching the laser oscillator of each narrow band light of RGB three primary colors) and use the equipment of grating light valve (hereinafter being referred to as ＂ GLV ＂) as light valve.In this class projector, the luminous flux of each colorama that is sent by laser oscillator is spatially modulated according to picture signal by GLV, and divide to mix the luminous flux of being modulated, and then form than the sharper keen coloured image light of the formed coloured image of any conventional projector by light mixing.This coloured image light amplifies by projecting lens, and transmission makes the observer can see image on screen on screen.
For instance, as the used screen of this projector, image light in screen front-reflection projector (front projector) emission is arranged, so that the observer can see the screen of the image that is projeced into screen by observing reflected light, and provide this screen, for example, reflection horizon, light absorbing zone and scattering layer with predetermined angle of view characteristic are formed at suprabasil structure successively, have the screen (for example referring to patent document 1) of improved contrast performance simultaneously.
Patent document 1: the instructions that No. the 3103802nd, Jap.P. (0017 and 0018 section, Fig. 1)
Yet in above-mentioned screen, the reflection horizon that is made of aluminium foil is reflected image light not only, and reflect ambient light, thereby the improvement of contrast performance is not gratifying.In addition, than the light absorbing zone of the more close surperficial side in reflection horizon, absorbing environmental light not only, and absorb the image light of the layer reflection that be reflected, the problem that causes the white light level of screen epigraph to reduce.
Because the problems referred to above that accompany with routine techniques, task of the present invention provides a kind of screen with high-contrast and high-gain and preparation method thereof, and this method helps producing in enormous quantities.
Summary of the invention
In order to address the above problem, the applicant identical with the applicant proposed a kind of screen, it utilizes according to the optionally catoptrical selective reflecting layer of wavelength coverage, the image light that main reflection is sent from projector, and reflection sources other light outside projector not, for example be derived from the light of fluorescence irradiation, the sun etc., that is surround lighting (for example, Japanese patent application is 2002-070799 number).This screen has and is formed at suprabasil selective reflecting layer, is formed at the selective reflecting layer front side, is used for scattered reflection scattering of light layer, and be formed at the selective reflecting layer rear side, be used to absorb the absorption layer of transmitted light.Selective reflecting layer is to comprise the high index of refraction optical thin film that alternately piles up each other and the optical multilayer film of low-refraction optical thin film, and has such character: the light of its episcopic projector wavelength of light scope, the for example light of three primary colors promptly red (R), green (G), blue (B) wavelength coverage, and transmission peak wavelength scope other light beyond three primary colors.In this screen, can suppress the harmful effect of surround lighting significantly, even thereby in the illumination bright room, also can reduce black-level not reducing under the situation of screen gain, make on screen, to present picture rich in detail with high-contrast.
Yet high refractive index layer and low-index layer must form by dry method such as sputtering method, and the size of the vacuum processing chamber in the gravity pouring machine is restricted, and are restricted so can be placed on the size of the substrate in the process chamber, make the size that is difficult to increase screen.In addition, the use of dry method has limited production in enormous quantities.
In addition, in order to obtain to have the optical thin film of high reflectance, must increase the number of the lamination that constitutes optical thin film, thereby increase the number of the step that forms optical thin film inevitably, cause the product yield of screen to reduce.
The inventor has been noted that dry method causes the fact of the problems referred to above, and has carried out extensive research.As a result, they have finished the invention of screen and preparation method thereof, and the advantage of this screen is that not only it can increase size, and have the characteristic of the production in enormous quantities of being beneficial to, but also are that it can realize high-contrast and high-gain and high reflectance.
Particularly, the screen of the invention of the claim 1 that Gong addresses the above problem is characterised in that, it comprises and is positioned at suprabasil optical multilayer film, this optical multilayer film by (2n+1) layer form (wherein n be 1 or bigger integer), each layer has highly reflective to the light of particular range of wavelengths, and at least the visible light outside this particular range of wavelengths had high transmittance; Wherein this optical multilayer film forms by rubbing method.
According to the invention of claim 1, optical multilayer film can be formed at size than in the big substrate of the used substrate of dry method, and then the large scale screen that can realize having high-contrast and high-gain.
The screen of the invention of the claim 2 that Gong addresses the above problem is the screens according to the invention of claim 1, it is characterized in that described substrate is transparent, and described optical multilayer film is formed on two surfaces of substrate by rubbing method.
Invention according to claim 2, the sum that constitutes the lamination of optical multilayer film in this screen doubles the conventional screen that only has optical multilayer film on a surface, even it is identical with conventional screen to work as the lamination number that constitutes each surperficial optical multilayer film, so can realize high reflectance.
Optical thin film can be undertaken by the mode that substrate be impregnated in the predetermined coating composition in two lip-deep formation of substrate.In this case, the preferably clear substrate has 1.30～1.69 refractive index.
The screen of the invention of the claim 3 that Gong addresses the above problem is the screens according to the invention of claim 1, it is characterized in that described optical multilayer film has stacked structure, this stacked structure comprises second optical thin film that first optical thin film with high index of refraction and refractive index are lower than first optical thin film, wherein said first optical thin film and second optical thin film pile up thereon each other, and the outermost layer of described optical multilayer film is made of first optical thin film.
The screen of the invention of the claim 4 that Gong addresses the above problem is the screens according to the invention of claim 3, it is characterized in that described first optical thin film is the film that comprises fine metal oxide particles, spreading agent and cementing agent, described second optical thin film is to comprise fluorine resin or SiO
2The film of particulate.
The screen of the invention of the claim 5 that Gong addresses the above problem is the screens according to the invention of claim 4, it is characterized in that described fine metal oxide particles is TiO
2Or ZrO
2Particulate.
Invention according to claim 3～5, described optical multilayer film is made of odd-level, all constitute so that be positioned at the outermost layer of a projector light inlet side and an opposite side, thereby have the function of good selective reflecting layer by first optical thin film with high index of refraction.In addition, can choose the thickness of first optical thin film and second optical thin film arbitrarily, make formed optical multilayer film have the reflection light of required wavelength coverage and the character of other light outside this wavelength coverage of transmission, can realize consistent thus and have the screen of high-contrast and high-gain and high reflectance with projector light source.
The screen of the invention of the claim 6 that Gong addresses the above problem is the screens according to the invention of claim 3, it is characterized in that described particular range of wavelengths comprises the wavelength coverage of red, green, blue.
According to the invention of claim 6, can obtain from it face and can see the screen that the rgb light source is had the good image of high-contrast.
Particularly, in the invention of claim 3, when the refractive index with first optical thin film is adjusted to 1.70～2.10, the refractive index of second optical thin film is adjusted to 1.30～1.69, and when the thickness of first optical thin film and second optical thin film all is adjusted to 80nm to 15 μ m, can obtain having the optical multilayer film of such character: the projector light of its reflection RGB three primary colors wavelength coverage, and other light outside the transmission three primary colors wavelength coverage.
The screen of the invention of the claim 7 that Gong addresses the above problem is the screens according to the invention of claim 1, it is characterized in that having light absorbing zone, to absorb the light through optical multilayer film.
According to the invention of claim 7, the light of process optical multilayer film is absorbed, so can see having the more superior images of high-contrast on screen.
Can be in the precalculated position laminated black thin film, as light absorbing zone.
The screen of the invention of the claim 8 that Gong addresses the above problem is the screens according to the invention of claim 1, it is characterized in that having light scattering layer at the outermost layer of optical multilayer film the light that is reflected by optical multilayer film with scattering.
Invention according to Claim 8 by the light of optical multilayer film selective reflecting, is scattered when process and disengaging light scattering layer, so the observer can see the image of nature by the reflected light that observation is scattered.
The method for preparing screen of the invention of the claim 9 that Gong addresses the above problem is preparation comprises the screen of optical multilayer film in substrate methods, described optical multilayer film by (2n+1) layer form (wherein n be 1 or bigger integer), each layer has highly reflective to the light of particular range of wavelengths, and at least the visible light outside this particular range of wavelengths had high transmittance; The method that wherein prepares this optical multilayer film is characterised in that and comprises first application step, to form first optical thin film with high index of refraction by rubbing method; And second application step, forming second optical thin film that refractive index is lower than first optical thin film by rubbing method, and described first application step and described second application step hocket.
According to the invention of claim 9, optical multilayer film can more easily be formed at size than in the big substrate of the used substrate of dry method, makes to prepare the large scale screen with high-contrast and high-gain in large quantity.
Preferably alternately carry out first application step and second application step, and the final step of this method is first application step by predetermined periodicity.Thus, optical multilayer film is made of (2n+1) layer, makes the outermost layer of a projector light inlet side and an opposite side constitute by the optical thin film with high index of refraction, therefore has the function of good selective reflecting layer.
The method for preparing screen of the invention of the claim 10 that Gong addresses the above problem is preparation all comprises the screen of optical multilayer film on two surfaces of transparent substrates methods, each optical multilayer film by (2n+1) layer form (wherein n be 1 or bigger integer), each layer has highly reflective to the light of particular range of wavelengths, and at least the visible light outside this particular range of wavelengths had high transmittance; The method that wherein prepares described optical multilayer film is characterised in that and comprises first application step, to form first optical thin film with high index of refraction by dip coating on two surfaces of the substrate that will be coated with; And second application step, on two surfaces of the substrate that will be coated with, to form second optical thin film that refractive index is lower than first optical thin film by dip coating; And described first application step and described second application step hocket.
Invention according to claim 10, can be under the situation that reduces the number of steps that forms optical thin film, the optical multilayer film that preparation is made of the stack layer of required number, so improve the product yield of large scale screen, make to prepare screen in large quantity with high-contrast and high-gain and high reflectance.
The method for preparing screen of the invention of the claim 11 that Gong addresses the above problem is the methods according to the invention of claim 10, the outermost layer that it is characterized in that being included in one of described optical multilayer film forms the step of light absorbing zone, to absorb the light that sees through described optical multilayer film.
The method for preparing screen of the invention of the claim 12 that Gong addresses the above problem is the methods according to the invention of claim 11, it is characterized in that forming the step of light scattering layer, the light of being launched by described optical multilayer film with scattering at the outermost layer of another optical multilayer film.
According to the invention of claim 12, form light scattering layer, its scattering is by the light of optical multilayer film selective reflecting and allow its process, makes can prepare the reflected light that the observer can be scattered by observation and see the screen of natural image in the above.
According to the invention of claim 11, form light absorbing zone, it absorbs the light that sees through optical multilayer film, makes to prepare to see having the more screen of the superior images of high-contrast in the above.
Description of drawings
Fig. 1 is the sectional drawing of screen construction one of according to an embodiment of the present invention.
Fig. 2 is the sectional drawing of screen construction according to another embodiment of the invention.
Embodiment
Hereinafter, will the embodiment of screen of the present invention be described.Below embodiment only be for example, it should be considered as is restriction to scope of the present invention.
The example of the structure of screen of the present invention is shown among Fig. 1.Screen 10 has optical multilayer film 12, light absorbing zone 13 and light scattering layer 14 and is formed at structure in the substrate 11.
The preferably clear film is a plastic sheeting, and conduct constitutes the example of the material of this film, preferred cellulose derivant (as diacetyl cellulose, tri acetyl cellulose (TAC), propiono cellulose, bytyry cellulose, acetyl group propiono cellulose and NC Nitroncellulose); (methyl) acryl resin as polymethylmethacrylate, reaches methyl methacrylate and other vinyl monomer as (methyl) alkyl acrylate or cinnamic multipolymer; Polycarbonate resin is as polycarbonate and diglycol diallyl carbonic ester (CR-39); Thermosetting (methyl) acryl resin, as the homopolymer or the multipolymer of (bromination) bisphenol-A two (methyl) acrylate, and the polymkeric substance or the multipolymer of (bromination) bisphenol-A list (methyl) acrylate urethane modified monomer; Polyester, particularly polyethylene terephthalate, Polyethylene Naphthalate, and unsaturated polyester (UP); Acrylonitritrile-styrene resin; Polyvinylchloride; Polyurethane; And epoxy resin.In addition, also can use and have stable on heating aromatic polyamide resin.In this case, be limited to 200 ℃ or higher on the heating-up temperature, therefore, the temperature range of expectation film is wideer.
Plastic sheeting can obtain by following method, wherein with above-mentioned resin stretched or with solvent dilution and form film, carries out drying then.From obtaining the angle of rigidity, the thickness of preferred film is bigger, and from suppressing the angle of turbidity, the thickness of preferred film is less, and is generally about 25～500 μ m.
The surface of plastic sheeting can cover coating material such as hard conating, and is formed at the coating material that is made of inorganic material and organic material under the optical multilayer film and can improves multiple character, as tack, hardness, chemical-resistant, permanance and dyeability.
As selection, can in substrate 11, form optically functional film or bottom (primary layer), as surface treatment to transparent substrates.The example of bottom comprises organic alkoxide compound, polyester, acrylic acid modified polyester and polyurethane.In addition, preferred substrate is through Corona discharge Treatment or UV treatment with irradiation.
Essential characteristic of the present invention is optical multilayer film 12, and this optical multilayer film comprises the optical thin film 12H with high index of refraction, its be used for following optical thin film by coating in substrate materials A as first optical thin film, and make it to solidify and obtain; And have an optical thin film 12L of low-refraction, its be used for following optical thin film by coating material B as second optical thin film, and make it to solidify and obtain, wherein optical thin film 12H and optical thin film 12L alternately pile up each other.Particularly, optical multilayer film 12 has such structure: the optical thin film 12H with high index of refraction at first is formed in the substrate, form optical thin film 12L then in the above with low-refraction, then alternately form optical thin film 12H and optical thin film 12L, and finally form optical thin film 12H, in other words, optical multilayer film 12 be film that piles up of constituting by (2n+1) layer (wherein n be 1 or bigger integer).
Optical thin film 12H is used for the materials A of optical thin film by coating on substrate 11 or optical thin film 12L, implements the curing reaction of material then and the optical thin film that obtains.Optical thin film 12H comprises the particulate that is used to control refractive index.
Optical thin film 12H preferably has 80nm to 15 μ m, more preferably 600 to 1000nm thickness.When the thickness of optical thin film 12H during greater than 15 μ m, the amount of the turbidity component that is made of the particulate that does not disperse increases, and makes to be difficult to realize suitable optical thin film function.
Optical thin film 12H preferably has 1.70～2.10 refractive index.When the refractive index of optical thin film 12H was higher than 2.10, the scattering property of particulate was unsatisfactory, made the function of optical thin film worsen.On the other hand,, then on optical thin film 12H, pile up after the optical thin film 12L and the reflecting properties realized is unsatisfactory, make the screen of gained have the satisfactory performance of being difficult to unfriendly if the refractive index of optical thin film 12H is lower than 1.70.
Optical thin film 12L is that refractive index is 1.30～1.69 optical thin film, and it is the material B that is used for optical thin film by coating on optical thin film 12H, and the curing reaction of implementing material then forms.The refractive index of optical thin film 12L depend in the optical thin film material B resinous type, and the type and the quantity of optional contained particulate.When the refractive index of optical thin film 12L is higher than 1.69, can not guarantee the refractive index difference between optical thin film 12L and optical thin film 12H, therefore, the reflecting properties that piles up on optical thin film 12H after the optical thin film 12L and realize can not be satisfactory, makes the screen of gained have the satisfactory performance of being difficult to unfriendly.In addition, forming refractive index, to be lower than 1.3 film be difficult, therefore, and from the angle of producing, the 1.3rd, the lower limit of refractive index.
Optical thin film 12L preferably has 80nm to 15 μ m, more preferably 600 to 1000nm thickness.
Owing to have said structure,, and at least the visible light outside described three wavelength coverages had high transmittance so the light that 12 pairs of three wavelength coverages of optical multilayer film are the red, green, blue optical wavelength range has highly reflective.By changing optical thin film 12H, 12L refractive index or thickness separately, can change or control the wavelength in three wavelength coverages that optical multilayer film 12 will reflect, make suitably processing projector institute wavelength of light emitted of optical multilayer film 12.
For the optical thin film 12H that constitutes optical multilayer film 12, the number of plies of 12L, there is not concrete restriction, optical thin film 12H, 12L can have the desirable number of plies.Preferred optical multilayer film 12 is made of odd-level, so that the outermost layer of a projector light inlet side and an opposite side constitutes by optical thin film 12H.For trichromatic wavelength coverage,, have the color filter functionality more favourable than the optical multilayer film that constitutes by even level by the optical multilayer film 12 that odd-level constitutes.
Particularly, preferred optical multilayer film 12 is made of 3～7 layers odd-level.When the number of plies is two-layer or still less the time, optical multilayer film 12 serves as the reflection horizon unsatisfactorily.On the other hand, the number of plies that constitutes optical multilayer film is big more, and the reflectivity of optical multilayer film is high more, but, when the number of plies is eight layers or more for a long time, gathering way of reflectivity is little, that can not realize expecting passes through to increase the effect that the number of times that forms optical multilayer film 12 improves reflectivity.
The light that light absorbing zone 13 absorbs through optical multilayer film 12, for example, Fig. 1 shows black thin film and is stacked on optical multilayer film 12 outermost lip-deep embodiments.
As selection, light absorbing zone 13 can be the coating that the coating composition by painting black obtains.
The example of black coating composition comprises particulate, as carbon black particulate and the surperficial monox particulate that scribbles carbon black.These particulates can conduct electricity.
As the method for preparing the carbon black particulate, oil oven method, tunneling method, lamp method and Re Fa are known method.
When particulate was used to deepen blackness, the primary particle size of particulate and scattering property were the key factors of decision film blackness, and the particulate with less primary particle size and large surface area also improves pitch black degree (jet-blackness).Carbon black with exhibiting high surface functional group, carrier such as alkyd resin with polar functional group (as OH group or carboxyl) had high-affinity, and when the hydrocarbon solvent with low polarity used, carbon black increased the wettability to resin, thereby improved the gloss and the pitch black degree of gained film.In addition, preferably add the hardening agent with isocyanate group or carboxyl in particulate, so that film hardening, described isocyanate group or carboxyl have reactivity to the functional group in the above-mentioned resin.
Usually, the quantity of the surface functional group in the tunnel carbon still can increase the quantity according to the functional group in the carbon of oven process preparation by it is carried out oxidation greater than oven process carbon.Preferred carbon black has 30nm or littler, more preferably 20nm or littler primary particle size.When use had the carbon black of larger particle size, the pitch black degree of gained film reduced, and made the performance degradation of film as light absorbing zone.
Rubbing method can be a known method, as curtain coating method, knife coating or spraying process.
When the light source of projector was laser, in order to prevent to produce speckle patterns (it is a kind of scattering on the screen), the surface configuration pattern of preferred light scattering layer 14 was at random.
Particularly, incident light on the screen 10 is through light scattering layer 14, arrive optical multilayer film 12, the surround lighting component that is comprised in the optical multilayer film 12 transmission incident lights, this surround lighting component is absorbed by light absorbing zone 13, have only the light of the particular range of wavelengths of responsible image optionally to be reflected, the light that is reflected is by the surperficial institute scattering of light scattering layer 14, and as image light to be sent to the observer with great visual angle.Therefore, can remove the adverse effect of surround lighting by high level, make to obtain the contrast higher than conventional screen to image light (it is reflected light).
Screen of the present invention can have structure shown in Figure 2, it comprises and is formed at substrate front side and the structure optical multilayer film identical with said structure, be formed at the outermost lip-deep light scattering layer of optical multilayer film, and be formed at the light absorbing zone of substrate rear side.This screen reflection is from the light of the specific wavelength of projector, and transmission and absorbing wavelength scope be different from other incident light (as surround lighting) of described specific wavelength, reducing the black-level (black level) on the screen, and then obtains high-contrast.
The materials A and the B that below explanation are used for optical thin film, it is the coating composition that is used to form first optical thin film and second optical thin film.
(1) is used for the materials A of optical thin film
The materials A that is used for optical thin film comprises particulate, and organic solvent absorbs energy being cured the cementing agent of reaction, and comprises the spreading agent of lipophilic group and hydrophilic group.
Described particulate is the particulate that is made of the high-index material of adding for the refractive index of controlling formed optical thin film, and the example comprises the oxide of Ti, Zr, Al, Ce, Sn, La, In, Y, Sb etc., and the alloyed oxide of In-Sn etc.Even the Ti oxide comprises the oxide of Al, the Zr etc. of an amount of inhibition photocatalysis, can not damage effect of the present invention yet.
Particulate preferably has 55～85m
2/ g, more preferably 75～85m
2The specific surface area of/g.When the specific surface area of particulate falls into this scope, make particulate in the optical thin film material, have 100nm or littler particle size to the dispersion treatment of particulate, can obtain the very little optical thin film of turbidity thus.
As the example of organic solvent, can use ketone solvent, as acetone, MEK, methyl isobutyl ketone or cyclohexanone; Alcoholic solvent is as methyl alcohol, ethanol, propyl alcohol, butanols or isobutyl alcohol; Perhaps ester solvent is as methyl acetate, ethyl acetate, butyl acetate, propyl acetate, ethyl lactate or acetate glycol ester.These organic solvents needn't have the purity up to 100%, and they can comprise quantity is 20% or impurity still less, as isomeride, unreacted reactant, decomposition product, oxide or moisture.In order said composition to be applied to substrate or to have the optical thin film of low-surface-energy, preferably have solvent than low surface tension, the example of this solvent comprises methyl isobutyl ketone, methyl alcohol, ethanol etc.
The example of cementing agent comprises thermoset resin, ultraviolet ray (UV) cured resin, and electron beam (EB) cured resin.The example of thermoset resin, UV cured resin and EB cured resin comprises polystyrene resin, styrol copolymer, polycarbonate, phenolics, epoxy resin, vibrin, urethane resin, Lauxite, melamine resin, polyamino resin, and urea-formaldehyde resin resin.Can use the polymkeric substance of (aromatic ring, heterocycle or the alicyclic ring) group that has another ring-type.As selection, can use the resin that has fluorine or silanol group in its carbochain.
The method of carrying out the resin solidification reaction can be radiation or add any method of pining for that still, when carrying out the curing reaction of resin by ultraviolet radiation, preferably this is reflected under the polymerization initiator existence and carries out.The example of radical polymerization initiator comprises azo-initiator, as 2,2 '-azoisobutyronitrile and 2,2 '-azo two (2, the 4-methyl pentane nitrile); And peroxide initiator, as benzoyl peroxide, lauroyl peroxide and the sad tert-butyl ester of mistake.For the polymerisable monomer of 100 weight portions altogether, the consumption of initiating agent is 0.2～10 weight portion, more preferably 0.5～5 weight portion.
Spreading agent comprises lipophilic group and hydrophilic group, and it improves the dispersibility of particulate.The weight-average molecular weight of the lipophilic group in the spreading agent is 110～3000.When the molecular weight of lipophilic group is lower than 110, spreading agent occurs and be dissolved in problem in the organic solvent unsatisfactorily, and when molecular weight greater than 3000 the time, then can not obtain gratifying particulate dispersiveness at optical thin film.Spreading agent can have the functional group that is cured reaction with cementing agent.
As hydrophilic group contained in the spreading agent, the amount of polar functional group is 10
-3～10
-1Mol/g.When the amount of functional group less than or during greater than this scope, then the dispersion to particulate does not have effect, causes dispersed the reduction.Functional group given below is effective polar functional group, because they do not cause any state of aggregation.The example comprises-SO
3M ,-OSO
3M ,-COOM, P=O (OM)
2(M represents hydrogen atom or alkaline metal such as lithium, potassium or sodium in the formula), tertiary amine, and quaternary ammonium salt R
1(R
2) (R
3) NHX (R in the formula
1, R
2And R
3Represent hydrogen atom or alkyl separately, X-represents the ion or the inorganic or organic ion of halogen such as chlorine, bromine or iodine).In addition, the example also comprises polar functional group, as-OH ,-SH ,-CN and epoxy radicals.These spreading agents can be used alone or as a mixture.In film of the present invention, the total amount of spreading agent is counted 20～60 weight portions by the particulate of 100 weight portions, is preferably 38～55 weight portions.
The materials A that will be used for optical thin film is coated with into film, promotes the curing reaction of film then by radiation or heating, to form first optical thin film of high index of refraction type.
(2) be used for the material B of optical thin film
The material B that is used for optical thin film comprises organic solvent and cementing agent.Cementing agent is dissolved in the organic solvent, and when needed, particulate can be added and be scattered in the solution of cementing agent.
Cementing agent is the resin that has functional group in the molecule, and its radiation or heat energy by ultraviolet ray etc. is cured reaction, preferred fluororesin etc.
Particulate be for the refractive index of controlling formed optical thin film choose wantonly add, by the particulate that low-index material constitutes, the example comprises SiO
2, MgF
2, hollow particulate and the particulate that constitutes by fluororesin.Can add the alloyed oxide of the oxide of Ti, Zr, Al, Ce, Sn, La, In, Y, Sb etc. or In-Sn etc.Even the Ti oxide comprises the oxide of Al, Zr etc. that an amount of being used to suppress photocatalysis, do not damage effect of the present invention yet.
As the example of organic solvent, can be used alone or as a mixture ketone solvent, as acetone, MEK, methyl isobutyl ketone and cyclohexanone; Alcoholic solvent is as methyl alcohol, ethanol, propyl alcohol, butanols and isobutyl alcohol; Ester solvent is as methyl acetate, ethyl acetate, butyl acetate, propyl acetate, ethyl lactate and acetate glycol ester; And contain fluorous solvent, as fluorine-containing aromatic hydrocarbons, perfluor benzene for example, phenyl-pentafluoride, 1,3-two (trifluoromethyl) benzene and 1,4-two (trifluoromethyl) benzene, fluorine-containing alkyl amine, for example perfluor tri-butylamine and PFTPA, fluorine-containing aliphatic hydrocarbon, perflexane for example, PFO, perfluoro decane, the perfluor dodecane, perfluor-2,7-dimethyl octane, 1,3-two chloro-1,1,2,2, the 3-pentafluoropropane, 1H-1,1-dichloro perfluoropropane, 1H-1,3-dichloro perfluoropropane, the 1H-perfluorinated butane, 2H, the 3H-perflenapent, 3H, 4H-perfluor-2-methylpentane, 2H, 3H-perfluor-2-methylpentane, perfluor-1, the 2-dimethylhexane, perfluor-1, the 3-dimethylhexane, the 1H-perflexane, 1H, 1H, 1H, 2H, the 2H-perflexane, 1H, 1H, 1H, 2H, the 2H-PFO, the 1H-PFO, 1H-perfluoro decane and 1H, 1H, 1H, 2H, the 2H-perfluoro decane, fluorine-containing alicyclic hydrocarbon, for example perfluorodecalin, perfluor cyclohexane and perfluor-1,3,5-trimethyl-cyclohexane, and fluorine-containing ether, for example perfluor-2-butyl tetrahydrofuran and fluorine-containing low molecular polyether.For example, use used organic solvent in the materials A of methyl isobutyl ketone as optical thin film, use fluorine-containing alcohol (C
6F
13C
2H
4OH) with the material B of mixed solvent (95:5) as optical thin film of perfluoro butyl amine in used organic solvent.These organic solvents needn't have the purity up to 100%, and they can comprise quantity is 20% or impurity still less, as isomeride, unreacted reactant, decomposition product, oxide or moisture.
The material B of optical thin film is coated with into film, stands curing reaction then, form second optical thin film that refractive index is lower than first optical thin film.
Be used for the materials A of optical thin film and the preparation method of B and comprise knead step and dispersion steps, and the optional blend step before or after above-mentioned steps.Be used for any raw material of the present invention, comprise particulate, resin and solvent, can when each step begins or in each step process, add.Each raw material can be divided into two parts or many parts, and can add in two or more steps individually.Described dispersion and knead and to utilize known equipment such as stirrer or coating oscillator to carry out.
The method of preparation reflective viewing screen 10 of the present invention will be described below.
(s1) preparation polyethylene terephthalate (PET) film, as substrate 11, and pass through dip coating, the materials A that will be used for optical thin film is coated on two surfaces of substrate 11 with predetermined amount, in described dip coating, substrate 11 impregnated in the container that the materials A that is used for optical thin film is housed, and therefrom takes out then.
(s2) drying is used for the film of the materials A of optical thin film, forms the optical thin film 12H that has predetermined thickness separately.
(s3) then, pass through dip coating, the material B that will be used for optical thin film is coated on the optical thin film 12H that is positioned at substrate 11 both sides with predetermined amount, in described dip coating, the substrate 11 that is formed with optical thin film 12H on it impregnated in the container that the material B that is used for optical thin film is housed, and therefrom takes out then.
(s4) drying is used for the material B of optical thin film, forms the optical thin film 12L that has predetermined thickness separately, and then forms the stacked structure that comprises optical thin film 12H and optical thin film 12L.
(s5) then, by following method, the materials A that will be used for optical thin film is coated on predetermined amount and constitutes substrate outermost each optical thin film 12L in 11 both sides, in described method, pile up the substrate 11 that optical thin film 12H and 12L are arranged on it and impregnated in the container that the materials A that is used for optical thin film is housed, therefrom take out then.
(s6) drying is used for the film of the materials A of optical thin film, carries out radiation with ultraviolet ray then, is used for the materials A of optical thin film with curing, forms the optical thin film 12H that has predetermined thickness separately.Then, cycle of treatment among the step s3 to s6 is repeated predetermined times, form optical multilayer film 12 with both sides in substrate 11.
(s7) transparent adhesives (EPOTEK 396 that Epoxy Technology Inc. makes and sells) with low-refraction is coated on the optical multilayer film 12 that is positioned at the front side, and tabular light scattering layer 14 is placed on the bonding agent that is coated with, the feasible surface that is positioned at the light scattering layer 14 of uneven surface opposite one side contacts with bonding agent, follow cure adhesive, to serve as the adhesive linkage of bonding optical multilayer film 12 and light scattering layer 14.
(s8) will comprise the resin-coated on the optical multilayer film 12 that is positioned at rear side of black light absorbing agent,, obtain reflectivity screen 10 of the present invention thus to form light absorbing zone 13.
In given example, the materials A and the B that are used for optical thin film are coated with by dip coating, but the materials A and the B that are used for optical thin film all can be coated with by known coating process such as the coating of gravure formula, roller coat, blade coating or a mouthful pattern rubbing method.
In addition, screen according to another embodiment of the invention can have structure shown in Figure 2, and it comprises optical multilayer film 12, and the structure of described optical multilayer film 12 is identical with the above-mentioned structure that is formed at substrate 11 front sides; Light scattering layer 14, described light scattering layer 14 are formed on the outermost surface of optical multilayer film 12; And light absorbing zone 13, described light absorbing zone 13 is formed on the rear side of substrate.20 reflections of this screen are from the light of the specific wavelength of projector, and transmission and absorbing wavelength scope be different from the incident light (as surround lighting) of described specific wavelength, reducing the black-level on the screen, and then realize high-contrast.
(embodiment)
Hereinafter will describe and implement embodiments of the invention.The following examples only are a little examples, and it should be construed to is restriction to scope of the present invention.
(embodiment 1)
To describe below with the corresponding coating composition of optical thin film materials A (I) and with the prescription and the preparation method of the corresponding coating composition of optical thin film material B (II), and the method for the screen among the preparation embodiment 1.Below used ＂ weight portion ＂ be meant the weight ratio of each composition that is added, with respect to the general assembly (TW) that constitutes coating composition.
(1) coating composition (I)
Particulate: TiO
2Particulate
(Ishihara Sangyo company limited makes and sells; Average particle size particle size: about 20nm; Refractive index: 2.48)
100 weight portions (2% weight)
Spreading agent: silane coupling agent
(A-174; Nippon Unicar company limited makes and sells)
20 weight portions (0.4% weight)
Organic solvent: MEK
4800 weight portions (97.6% weight)
At first, particulate, spreading agent and organic solvent are mixed with predetermined amount, and disperse, obtain the particulate dispersion by means of the coating oscillator.In this particulate dispersion, add with respect to 100 weight portion TiO
2Particulate is that 33 weight portions (are equivalent to 33% weight, based on TiO
2Weight) as the basis of cementing agent potpourri (trade name: DPHA as the dipentaerythritol acrylate and dipentaerythritol five acrylate of UV cured resin; Nippon Kayaku company limited makes and sells), reaching with respect to cementing agent is that 3 weight portions (are equivalent to 3% weight, weight based on UV cured resin (potpourris of dipentaerythritol acrylate and dipentaerythritol five acrylate)) Darocure1173 as polymerization initiator, and stir by means of stirrer, make coating composition (I).The viscosity of this coating composition is 2.3cps, and proportion is 0.9g/cm
3
(2) coating composition (II)
The end formulation of coating composition (II) that is used for low refractive index film is as follows.
Cementing agent: fluoride copolymers resin
(TFE copolymer; DAIKIN INDUSTRIES company limited makes and sells; Solvent: butyl acetate; Solid content: 50% weight; Refractive index: 1.42)
20 weight portions (16.7% weight)
Organic solvent: methyl isobutyl ketone
100 weight portions (83.3% weight)
The viscosity of this coating composition is 4.0cps, and proportion is 0.84g/cm
3
(3) method of formation optical thin film
(s11) by dip coating, coating composition (I) is coated on transparent PET film (thickness: 188 μ m; Trade name: U426; Toray Industries Inc. makes and sells) two surfaces on.The condition of dip-coating is as follows:
Impregnating speed: 400mm/ minute
Retention time: 1 minute
Take-off speed: 350mm/ minute
(s12) film of dry paint composition (I) at room temperature forms the high index of refraction optical thin film that each surface all has 780nm thickness.
(s13) then, by dip coating, (II) is coated on the high index of refraction optical thin film with coating composition.The condition of dip-coating is as follows:
Impregnating speed: 400mm/ minute
Retention time: 1 minute
Take-off speed: 160mm/ minute
(s14) film of dry paint composition (II) at room temperature forms the low-refraction optical thin film that thickness separately is 1120nm.
(s15) under the condition identical, coating composition (I) is coated on the optical thin film (II) with step s11.
(s16) film of dry paint composition (I) at room temperature carries out ultraviolet ray (UV) then and solidifies (500mJ/cm
2), form the high index of refraction optical thin film that each surface all has 780nm thickness, on the PET film, obtain the optical multilayer film that constitutes by three layers (being optical thin film (I)/optical thin film (II)/optical thin film (I)) separately thus.
In evaluation, measure optical thin film (I) and optical thin film (II) refractive index separately by Filmetrics (Matsushita Inter-techno company limited makes and sells) to formed optical thin film.In addition, also by turbidity meter (JASCOV-560 type), measure the turbidity of optical multilayer film.In addition, also utilize Filmetrics (Matsushita Inter-techno company limited makes and sells) to measure the reflecting properties of optical multilayer film.With regard to reflecting properties, (be blue wavelength: 480nm, green wavelength: 560nm, red wavelength: 665nm) difference measurement of reflectivity to each wavelength in the three primary colors.
In addition, pass through adhesive layer, with black PET frlml laminating on the outermost surface of one of gained optical multilayer film, and pass through adhesive layer, scattering film is laminated on the outermost surface of another optical multilayer film, makes screen, and by spectral radiance meter (CS-1000, KONICAMINOLTA HOLDINGS, INC. make and sell) gain of measuring screen.Gain is meant the brightness (cd/m of screen
2) with the maximal value of the ratio of the brightness (value be 1) of blank during by rayed.
In addition, by the brightness of above-mentioned nitometer measurement screen, to measure contrast.Particularly, measure the brightness of screen by the time, measure the brightness of screen by the time then, and measure contrast with the ratio of the brightness of black light by the brightness of white light from the black light irradiation of projector from the white light of projector.
(embodiment 2)
Under condition substantially the same manner as Example 1, make optical multilayer film and screen, different is, the number that is stacked in the optical thin film among the embodiment 1 is become 7, that is, optical thin film (I)/optical thin film (II)/optical thin film (I)/optical thin film (II)/optical thin film (I)/optical thin film (II)/optical thin film (I).
(embodiment 3)
Under condition substantially the same manner as Example 1, prepare screen, different is, optical multilayer film among the embodiment 1 is formed on the first type surface as the PET film of substrate, and the PET film by adhesive layer laminated black on another first type surface, and by adhesive layer laminated scattering film on the outermost surface of optical multilayer film.
(embodiment 4)
Under condition substantially the same manner as Example 1, make screen, different is, it or not the PET film of laminated black in embodiment 1, but the coating composition of black is coated on the surface (the outermost surface of one of optical multilayer film) of PET film rear side by spraying process, and in dry and curing schedule, kept 30 minutes down in 75 ℃, to form light absorbing zone.
Used black coating composition obtains by solvent is added in the following composition.
Carbon black particulate: trade name, ORIGIPLATE; Origin ELECTRIC company limited makes and sells (primary particle size: 15nm)
Resin: alkyd resin with hydroxyl
Used hardening agent: trade name, POLYHARD MH (isocyanate-based curing agent), OriginELECTRIC company limited makes and sells.
(embodiment 5)
Make screen under condition substantially the same manner as Example 2, different is, is not the PET film of laminated black in embodiment 2, but carry out with embodiment 4 in identical processing.
(embodiment 6)
Make screen under condition substantially the same manner as Example 3, different is, is not the PET film of laminated black in embodiment 3, but carry out with embodiment 4 in identical processing.
(Comparative Examples 1)
Under condition substantially the same manner as Example 1, make optical multilayer film and screen, different is, the number that is stacked in the optical thin film among the embodiment 1 is become 1, that is, optical thin film (I).
(Comparative Examples 2)
Under condition substantially the same manner as Example 1, make optical multilayer film and screen, different is, the number that is stacked in the optical thin film among the embodiment 1 is become 2, that is, optical thin film (I)/optical thin film (II).
The results are shown in the table 1.
The optical multilayer film with two-sided three-decker among the embodiment 1 and 4 all has 55% reflectivity, and confirmed the increase of piling up the number of plies along with optical multilayer film, the reflectivity of optical multilayer film also increases, and the reflectivity of the optical multilayer film with two-sided seven-layer structure among the embodiment 2 and 5 is 90%.In addition, it is higher by 10% than the reflectivity of the optical multilayer film with single face three-decker in embodiment 3 and 6 to have a reflectivity (embodiment 1) of the optical multilayer film of two-sided three-decker.
For screen, the increase of verified gain is proportional with the number of plies of the stack layer that constitutes optical multilayer film, and for the screen of two-sided seven-layer structure, when light absorbing zone is made of black PET film (embodiment 2), can obtain 1.8 gain, (embodiment 5) can obtain 2.2 gain when light absorbing zone is made of filming of black.In addition, the ratio of contrast is as follows: be 26:1 in embodiment 1; In embodiment 2 42:1; In embodiment 3 21:1; In embodiment 4 35:1; In embodiment 5 55:1; In embodiment 6 28:1.
The result of Comparative Examples is as follows.
Comparative Examples 1: the reflectivity of optical multilayer film is 17%, and the gain of screen and contrast are respectively 0.3 and 8:1.
Comparative Examples 2: the reflectivity of optical multilayer film is 17%, and the gain of screen and contrast are respectively 0.3 and 8:1.
Table 1
Industrial applicibility
According to the invention of claim 1, can realize having the large size panel of high-contrast and high-gain Curtain.
According to the invention of claim 2, can realize high reflectance.
According to the invention of claim 3～5, can form and have the reflection light of required wave-length coverage and transmission The optical multilayer film of other light outside this wave-length coverage makes it possible to achieve consistent with projector light source And the screen with high-contrast and high-gain and high reflectance.
According to the invention of claim 6, can obtain such screen, namely can for the rgb light source Face is seen the screen of the qualitative picture with high-contrast from it.
According to the invention of claim 7, can see having the more high-quality figure of high-contrast from screen Picture.
Invention according to Claim 8, the reverberation that the observer is scattered by observation can be at screen On see the image of nature.
According to the invention of claim 9, can prepare in large quantity and have the big of high-contrast and high-gain The size screen.
According to the invention of claim 10, can improve and have high-contrast and high-gain and high reflection The product yield of the large scale screen of rate is so that can prepare in large quantity screen.
According to the invention of claim 11 and 12, can form the optical thin film with required refractive index.
According to the invention of claim 12, can prepare the reflection luminous energy that the observer is scattered by observation Enough screens of seeing in the above natural image.
According to the invention of claim 11, can prepare from it face and see having more high-contrast The screen of qualitative picture.
Claims (11)
1. screen is characterized in that it comprises:
Be positioned at suprabasil optical multilayer film, this optical multilayer film by (2n+1) layer form (wherein n be 1 or bigger integer), each layer has highly reflective to the light of particular range of wavelengths, and at least the visible light outside this particular range of wavelengths had high transmittance;
Wherein this optical multilayer film forms by rubbing method;
Wherein said substrate is transparent, and described optical multilayer film is formed on two surfaces of substrate by rubbing method.
2. according to the screen of claim 1, it is characterized in that described optical multilayer film comprises stacked structure, wherein have first optical thin film of high index of refraction and second optical thin film that refractive index is lower than first optical thin film and alternately pile up each other, and the outermost layer of described optical multilayer film is formed by first optical thin film.
3. according to the screen of claim 2, it is characterized in that described first optical thin film is the film that comprises fine metal oxide particles, spreading agent and cementing agent; Described second optical thin film is to comprise fluorine resin or SiO
2The film of particulate.
4. according to the screen of claim 3, it is characterized in that described fine metal oxide particles is TiO
2Or ZrO
2Particulate.
5. according to the screen of claim 2, it is characterized in that described particular range of wavelengths comprises the wavelength coverage of ruddiness, green glow and blue light.
6. according to the screen of claim 1, it is characterized in that comprising light absorbing zone, to absorb the light that sees through described optical multilayer film.
7. according to the screen of claim 1, it is characterized in that on the outermost layer of described optical multilayer film, comprising light scattering layer the light that is reflected by described optical multilayer film with scattering.
8. method for preparing the screen that comprises optical multilayer film in the substrate, described optical multilayer film by (2n+1) layer form (wherein n be 1 or bigger integer), each layer has highly reflective to the light of particular range of wavelengths, and at least the visible light outside this particular range of wavelengths had high transmittance; Wherein
The method for preparing this optical multilayer film comprises:
First application step is to form first optical thin film with high index of refraction by rubbing method;
Second application step is to form second optical thin film that refractive index is lower than first optical thin film by rubbing method; And
Described first application step and described second application step hocket.
9. one kind prepares the method that comprises the screen of optical multilayer film on two surfaces of transparent substrates, wherein each optical multilayer film by (2n+1) layer form (wherein n be 1 or bigger integer), each layer has highly reflective to the light of particular range of wavelengths, and at least the visible light outside this particular range of wavelengths had high transmittance; Wherein
The method for preparing described optical multilayer film comprises:
First application step is to form first optical thin film with high index of refraction by dip coating on two surfaces of the substrate that will be coated with;
Second application step is to form second optical thin film that refractive index is lower than first optical thin film by dip coating on two surfaces of the substrate that will be coated with; And
Described first application step and described second application step hocket.
10. according to the method for preparing screen of claim 9, it is characterized in that comprising:
Form the step of light absorbing zone at the outermost layer of described optical multilayer film one side, to absorb the light that sees through described optical multilayer film.
11. the method for preparing screen according to claim 10 is characterized in that comprising:
Form the step of light scattering layer at the outermost layer of described optical multilayer film opposite side, the light of being launched by described optical multilayer film with scattering.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP137795/2003 | 2003-05-15 | ||
| JP2003137795 | 2003-05-15 | ||
| JP072201/2004 | 2004-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1698010A CN1698010A (en) | 2005-11-16 |
| CN100489653C true CN100489653C (en) | 2009-05-20 |
Family
ID=35350162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480000694 Expired - Fee Related CN100489653C (en) | 2003-05-15 | 2004-05-14 | Screen and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100489653C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090461A (en) * | 2014-06-20 | 2014-10-08 | 江苏红叶视听器材股份有限公司 | Matte plastic projection screen and manufacturing method thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090462A (en) * | 2014-06-20 | 2014-10-08 | 江苏红叶视听器材股份有限公司 | Microbead screen surface and manufacturing method thereof |
| CN104090459A (en) * | 2014-06-20 | 2014-10-08 | 江苏红叶视听器材股份有限公司 | Grey micro-bead projection screen and manufacturing method thereof |
| CN105093662B (en) * | 2015-09-11 | 2018-07-06 | 深圳市华星光电技术有限公司 | Optical filter and backlight module |
| CN105068303B (en) * | 2015-09-11 | 2018-08-07 | 深圳市华星光电技术有限公司 | Array substrate and liquid crystal display panel |
| CN105182612A (en) * | 2015-10-26 | 2015-12-23 | 深圳市华星光电技术有限公司 | Light source assembly used for backlight module, backlight module and liquid crystal displayer |
| CN108285750A (en) * | 2017-08-11 | 2018-07-17 | 上海全鹰智能科技有限公司 | A kind of transparent orthographic projection display film |
-
2004
- 2004-05-14 CN CN 200480000694 patent/CN100489653C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090461A (en) * | 2014-06-20 | 2014-10-08 | 江苏红叶视听器材股份有限公司 | Matte plastic projection screen and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1698010A (en) | 2005-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1734291B (en) | Light diffusion sheet and method of producing the light diffusion sheet, and screen | |
| JP4274147B2 (en) | Optical multilayer film and reflection type screen | |
| CN1738711B (en) | Laminate containing silica and application composition for forming porous silica layer | |
| JP2006221070A (en) | Reflection type screen | |
| CN100489653C (en) | Screen and its manufacturing method | |
| JP2007011190A (en) | Reflective screen | |
| EP1630596A1 (en) | Screen and its manufacturing method | |
| JP2005283749A (en) | Optical diffusion film, its manufacturing method, and screen | |
| JP2005099675A (en) | Coating type optical laminated film, optical multilayer film and reflection screen | |
| JP2005025142A (en) | Light diffusion sheet, its manufacturing method and screen | |
| JP2000266930A (en) | Optical selective filter | |
| JP2005165252A (en) | Optical functionality diffusion board, reflection screen and its manufacturing method | |
| JP2004170959A (en) | Screen for projection | |
| CN102156311A (en) | Optical laminate and method for manufacturing the same, and polarizing plate and display device using the same | |
| JP4547948B2 (en) | Coating type optical film material, and optical multilayer film and reflecting screen using the same | |
| JP2004341407A (en) | Screen and its manufacturing method | |
| CN100412574C (en) | Method for producing mold for use in duplicating light diffusion sheet, light diffusion sheet and method for producing the same, and screen | |
| JP2004361922A (en) | Coating type optical film material, and optical multi-layer film and reflection screen using the material | |
| JP2005202029A (en) | Reflection type screen | |
| JP2005321432A (en) | Reflective screen | |
| JP2006301311A (en) | Optically functional diffusing plate, reflection type screen and method for manufacturing the same | |
| JP2006350185A (en) | Reflection screen | |
| JP2006126474A (en) | Coated optical film and its producing method, optical multilayer film, reflection screen and dip coating apparatus | |
| JP2005115243A (en) | Reflection type screen and its manufacturing method | |
| JP2001215623A (en) | Display device, back projection type display device and method of manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20100514 |