WO2018110031A1 - Écran transparent - Google Patents

Écran transparent Download PDF

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Publication number
WO2018110031A1
WO2018110031A1 PCT/JP2017/034614 JP2017034614W WO2018110031A1 WO 2018110031 A1 WO2018110031 A1 WO 2018110031A1 JP 2017034614 W JP2017034614 W JP 2017034614W WO 2018110031 A1 WO2018110031 A1 WO 2018110031A1
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WO
WIPO (PCT)
Prior art keywords
light
transparent screen
image
projector
projection system
Prior art date
Application number
PCT/JP2017/034614
Other languages
English (en)
Japanese (ja)
Inventor
敬介 村田
忍 荒田
Original Assignee
セントラル硝子株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2017017228A external-priority patent/JP2018106138A/ja
Application filed by セントラル硝子株式会社 filed Critical セントラル硝子株式会社
Publication of WO2018110031A1 publication Critical patent/WO2018110031A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • 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
    • 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
    • G03B21/14—Details
    • 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
    • G03B21/62—Translucent screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention relates to a transparent screen formed with a light-scattering film that displays projection light projected from a projector so as to be visible to an observer as an image.
  • a transparent screen that projects and displays information such as advertisements on a commercial window in a city, a guide window, etc. while maintaining light transparency has attracted attention in the building field.
  • a transparent screen as a display for projecting positional information or the like onto the windshield of an automobile has been actively studied in recent years, and has attracted attention in the automobile field.
  • an article including a light-scattering film in which a light-scattering body is dispersed in a transparent dispersion medium and a substrate such as a glass substrate has a screen transparency, a sharp image, and a wide viewing angle. It is attracting attention from the viewpoint.
  • the light scattering coating there are known resin coatings in which fine particles such as diamond and silica are dispersed as in Patent Documents 1, 2, and 3.
  • Patent Document 4 describes a transmissive screen having a support and a light diffusion layer composed of a binder component and light diffusing particles.
  • Patent Document 5 describes an image display device including a projector, a transmissive screen, and two polarizing plates as direct light blocking means for blocking direct light from the projector.
  • Patent Document 6 describes a laminate of light control films and a projection screen using the same.
  • Patent Document 7 describes a projection screen using a light control film.
  • the direct transmitted light that has passed through the transparent screen is also projected outside the parking lots such as convenience stores and the building parts such as sidewalks and roads.
  • the direct transmitted light from a projector with high brightness directly enters the eyes and is dazzling (observer 2 in FIG. 2), which is a safety problem. This is not a problem with conventional transparent screens having a very low transmittance, or transparent screens having a very low gloss or a very high haze.
  • an object of the present invention is to provide a transparent screen having a light-scattering film that can directly suppress transmitted light while maintaining the sharpness of the projected image and the transparency of the transparent screen.
  • the inventors have determined that the substrate, a light-scattering film that displays at least the projected image on the substrate, and the incident light angle dependency of the visible light transmittance.
  • the present inventors have found that the above-mentioned problems can be solved by using a transparent screen having a light control film for controlling the light, and have reached the present invention.
  • the transparent screen of the present invention includes the following inventions.
  • invention 1 A substrate, and at least on the substrate, A light-scattering coating that displays the projected image; A transparent screen comprising a light control film for controlling the incident light angle dependency of visible light transmittance.
  • invention 2 When the incident light angle is ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °) and the visible light transmittance is TVIS ( ⁇ ), TVIS (0 °) ⁇ 50%, And, The transparent screen according to invention 1, wherein the range of ⁇ where TVIS ( ⁇ ) ⁇ 35% is 30 ° or more.
  • FIG. 5 A transparent screen made of a multi-layer glass, the multi-layer glass, A first glass substrate and a second glass substrate facing each other at a predetermined distance; A hollow layer sealed between the first glass substrate and the second glass substrate; A light-scattering film comprising a light-scattering film formed on the first glass substrate and displaying a projected image; A transparent screen comprising a light control film that is formed on the second glass substrate and controls the incident light angle dependency of visible light transmittance.
  • FIG. 6 The transparent screen according to any one of inventions 1 to 5, wherein the transparent screen is for a store or for a show window.
  • a video projection system using a light-scattering coating wherein the video projection system comprises: A video projector, An image projection system comprising: the transparent screen according to any one of inventions 1 to 6 having a light-scattering film that displays an image projected from the image projector.
  • a video projection system using a light-scattering coating wherein the video projection system comprises: A video projector, A window including a transparent screen according to any one of claims 1 to 6, further comprising a light-scattering film that displays an image projected from the image projector.
  • the video projector is disposed indoors, The image projected from the image projector and transmitted through the window including the transparent screen and transmitted outside the room is attenuated in accordance with the incident light angle dependency of the visible light transmittance of the light control film.
  • Projection system. A video projection system using a light-scattering coating, wherein the video projection system comprises: A video projector, The transparent screen according to any one of claims 2 to 6, further comprising a light-scattering film that displays an image projected from the image projector.
  • An image projection system wherein an incident light angle ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °) from the image projector is an angle at which the visible light transmittance TVIS ( ⁇ ) is 35% or less.
  • a video projection system using a light-scattering coating comprising: A video projector, A window including a transparent screen according to any one of claims 2 to 6, further comprising a light-scattering film that displays an image projected from the image projector.
  • the video projector is disposed indoors,
  • the incident light angle ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °) from the video projector is an angle where the visible light transmittance TVIS ( ⁇ ) is 35% or less,
  • the image projected from the image projector and transmitted through the window including the transparent screen and transmitted outside the room is attenuated in accordance with the incident light angle dependency of the visible light transmittance of the light control film. Projection system.
  • the present invention it is possible to provide a transparent screen that is less likely to cause a safety problem by directly suppressing transmitted light while maintaining the sharpness of the projected image and the transparency of the transparent screen.
  • the transparent screen of the present invention has a base material, at least a light scattering film for displaying a projected image on the base material, and a light control film for controlling the incident light angle dependency of the visible light transmittance. It is the transparent screen characterized by this.
  • a light control film that has a base material and a light scattering film for displaying the projected image on the base material, and controls the incident light angle dependency of the visible light transmittance on the light scattering film.
  • a transparent screen with A base material, and a light control film for controlling incident light angle dependency of visible light transmittance on the base material, and a light scattering film for displaying a projected image on the light control film.
  • a transparent screen may be used.
  • the incident light angle of the projection light on the transparent screen surface of the present invention is ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °) and the visible light transmittance is TVIS ( ⁇ )
  • TVIS (0 °) ⁇ 50% is satisfied.
  • TVIS (0 °) ⁇ 60% is more preferable
  • TVIS (0 °) ⁇ 70% is more preferable.
  • TVIS (0 °) is higher, the back side of the transparent screen can be seen more transparently, so it is easier to take advantage of the characteristics of the transparent screen, such as fusion with video projected on the transparent screen.
  • the range of ⁇ satisfying TVIS ( ⁇ ) ⁇ 35% is preferably 30 ° or more, more preferably 40 ° or more, and further preferably 50 ° or more. If it demonstrates using FIG. 4, the visible light transmittance
  • the transmitted light can be directly cut and projected onto the transparent screen. You can see the video.
  • the specific oblique incident direction is set to be a region having a low visible light transmittance as shown in FIG. In this case, it is preferable that the back surface seen through the transparent screen from the observer can be visually recognized at the same time.
  • the incident direction of the projection light from the projector is inclined by ⁇ from the Z-axis direction.
  • the angle is changed.
  • ⁇ is an angle region where the above-mentioned visible light transmittance TVIS ( ⁇ ) ⁇ 35%
  • the problem of directly transmitted light is not seen.
  • it is preferable that the angle dependency in the direction ( ⁇ direction) perpendicular to the angle region where the visible light transmittance TVIS ( ⁇ ) ⁇ 35% is smaller.
  • H ( ⁇ ) ⁇ 50% where H ( ⁇ 90 ° ⁇ ⁇ 90 °) is the incident light angle of the projection light onto the transparent screen surface of the present invention and H ( ⁇ ) is the haze. Is preferably 30 ° or more, more preferably 40 ° or more, and even more preferably 50 ° or more.
  • H ( ⁇ ) ⁇ 50% the directly transmitted light is scattered and the glare is reduced. Although the direct transmitted light is cut at the position of the observer 2 in FIG.
  • the transparent screen of the present invention is greatly different in that only the transmitted light is directly cut and the projected image can be viewed with a wide viewing angle as described above. Especially when projecting and displaying information such as advertisements using a transparent screen as a show window or window, it is necessary for many viewers to recognize the image. Therefore, it is preferable that there is no specific position where the image is not seen or less. .
  • the transparent base material is typically a glass substrate, but examples of the glass material include tempered glass, film-attached glass, laminated glass, and the like. From the material, soda lime glass, aluminosilicate glass, boron Various glass materials such as silicate glass and alkali-free glass can be used in the form of a plate.
  • transparent substrates include plastic resin plates and film substrates, such as polycarbonate resins, polyethylene terephthalate resins, polymethyl methacrylate resins, polyethylene resins, polypropylene resins, polystyrene resins, polyester resins, polyvinyl alcohol resins, A transparent substrate made of polyvinyl chloride resin, polyvinylidene chloride resin, triacetyl cellulose resin, polyamide resin, or other plastics can be used. From the viewpoint of durability such as weather resistance, a transparent substrate made of a metal oxide such as glass is preferable to a transparent substrate made of plastic.
  • a glass with a mesh a tempered glass, a heat-resistant tempered glass, a security glass, a heat ray absorbing glass, a heat ray reflecting glass, or a glass with a low radiation film may be used.
  • the size of the substrate used in the present invention is appropriately determined according to the application. Further, the plate thickness is usually set according to the application, for example, according to the strength required in the mode of use. Specifically, a plate thickness of 1 mm to 30 mm is usually used. Not only a substrate having a flat surface, but also a substrate having an uneven surface or a substrate having a pattern formed thereon may be used. In the case of a substrate with irregularities on the surface or a substrate with a pattern formed, in addition to the light scattering property, the effect of optical reflection by the irregularities and patterns on the surface can also be obtained, and the appearance different from the substrate with a flat surface can be obtained. I can do it. For example, a hologram-like appearance whose color changes depending on the viewing angle can be obtained, and the design can be enhanced.
  • the substrate may be flat or curved.
  • the curved substrate is a substrate having a convex side and a concave side that are pre-bent three-dimensionally, and has a curvature radius of 0.5 m to 3 m. Further, it may be preferably 0.9 m to 2.6 m.
  • a base material bent three-dimensionally may have different radii of curvature at the central portion and the peripheral portion of the surface of the base material. In this case, the peripheral portion generally has a smaller radius of curvature. Further, the curvature radius may be different between the vertical direction and the horizontal direction of the substrate.
  • the light-scattering film for displaying a projected image used in the present invention is formed on the substrate or the light control film described later, and is a film in which a light-scattering body is dispersed in a transparent dispersion medium. is there.
  • the light scatterer appropriately dispersed in the transparent dispersion medium scatters the projection light from the projector at a wide angle, so that an image can be displayed as a transparent screen.
  • the light-scattering film may be formed by applying and drying a coating solution on a substrate or a light control film, or a film may be attached.
  • Examples of the transparent dispersion medium include organic polymers and inorganic polymers.
  • organic polymers include polyester resin, polycarbonate resin, polyacrylic resin, polystyrene resin, polyarylate resin, polyolefin resin, polyvinyl chloride resin, polyvinylidene chloride resin, polysulfone resin, polyethersulfone resin, diacetylcellulose resin, triacetyl Examples thereof include cellulose resin, ethylene vinyl alcohol copolymer, polyvinyl alcohol resin, and polyvinyl butyral resin.
  • the inorganic polymer is an inorganic oxide polymer that is polymerized in a network form through oxygen atoms centered on atoms such as silicon, titanium, zirconium, iron, zinc, tin, hafnium, and tungsten.
  • silicon oxide such as silica
  • raw materials or starting materials such as alumina, titania, zirconia, iron oxide, zinc oxide, tin oxide, hafnium oxide, tungsten oxide, etc. It can also be used.
  • the light scatterer examples include low refractive index particles such as hollow silica beads and hollow resin beads, and high refractive index particles such as titanium oxide, zirconium oxide, iron oxide, tin oxide, barium titanate, and diamond. It is done. Among these, titanium oxide particles, zirconium oxide particles, and diamond particles have high refractive index and strong light scattering properties, so that both transparency and image sharpness can be achieved when used as a light scatterer for light-scattering coatings. It is preferable in that it can be performed.
  • the light control film used in the present invention may be formed by applying and drying a coating solution on the surface of a substrate or a coating, or may be affixed with a film.
  • a film When a film is mainly applied, a multilayer structure having other functions such as a scattering prevention function, an ultraviolet ray blocking function, a crime prevention function, and an electromagnetic shielding function may be used.
  • the light control film typically irradiates a composition containing at least two kinds of photopolymerizable monomers or oligomers having different refractive indexes with a linear light source from a certain direction using a linear light source. And is cured to induce phase separation in the composition.
  • the generated light control film has a layer structure in a specific direction due to phase separation of resins with different refractive indexes, and only incident light in a specific angle range corresponding to the active energy ray irradiation direction at the time of manufacture. Is made opaque only in the angular direction. Scattering intensity and angle dependence can be controlled by changing the incident light angle of the composition used and the irradiation light.
  • a light source such as a high pressure mercury lamp, a metal halide lamp, an LED, a short arc lamp, or an electrodeless mercury lamp is used.
  • the photopolymerizable monomer or oligomer used for the production of the light control film is a compound having at least one polymerizable functional group such as a (meth) acryloyl group, a vinyl group or an allyl group in the molecule.
  • Examples of monomers include methoxypolyethylene glycol acrylate, methoxypolypropylene glycol acrylate, ethoxypolyethylene glycol acrylate, ethoxypolypropylene glycol acrylate, phenoxypolyethylene glycol acrylate, phenoxypolypropylene glycol acrylate, ethoxyphenylphenol acrylate, 2-acryloyloxyethyl succinate, and isostearyl.
  • oligomer examples include urethane acrylate, epoxy acrylate, polyester acrylate, polyol polyacrylate, modified polyol polyacrylate, isocyanuric acid skeleton polyacrylate, melamine acrylate, hydantoin skeleton polyacrylate, polybutadiene acrylate, epoxy acrylate, urethane acrylate, and the like. Acrylates and methacrylates corresponding to these acrylates.
  • ⁇ Others> Other coatings may be included between the base material and the light scattering film, between the base material and the light control film, and between the light scattering film and the light control film.
  • other coatings include resins used for laminated glass interlayers such as ethylene vinyl acetate and polyvinyl butyral, thin films such as metal films, metal oxide films, and metal nitride films, and laminates thereof.
  • resins used for laminated glass interlayers such as ethylene vinyl acetate and polyvinyl butyral
  • thin films such as metal films, metal oxide films, and metal nitride films, and laminates thereof.
  • a highly reflective film between the light scattering film and the light control film the sharpness of the image viewed from the image projector side is enhanced.
  • a titanium oxide thin film, an aluminum thin film, a silver thin film, a stainless steel thin film, etc. are mentioned.
  • the coating may be formed by applying and drying a coating solution, or may be affixed with a film.
  • the transparent screen of the present invention can be laminated glass.
  • a light scattering film and a light control film are provided on the first glass substrate, and the second glass substrate is a normal glass, and an intermediate film is sandwiched between the first glass substrate and the second glass substrate.
  • a laminated glass structure is provided, which is advantageous in terms of safety.
  • a light scattering film may be provided on the first glass base material, and a light control film may be provided on the second glass base material to form a laminated structure.
  • the structure of the intermediate film can be multilayered, and one of them can be a light-scattering film and / or a light control film.
  • a light scattering film is provided on the first glass substrate, the second glass substrate is made of ordinary glass, and the intermediate film is made of polyvinyl butyral / light control film / polyvinyl butyral.
  • the transparent screen of the present invention can be a double glazing.
  • a light scattering film and a light control film are provided on the first glass substrate, and the second glass substrate is made of ordinary glass so as to face each other at a predetermined distance, and the first glass substrate and the second glass substrate are opposed to each other.
  • a sealed hollow layer may be provided between the glass substrate.
  • a light scattering film may be provided on the first glass substrate, and a light control film may be provided on the second glass substrate to similarly form a multilayer glass.
  • the video projection system of the present invention is a video projection system using a light-scattering coating, and the video projection system includes a video projector and the light-scattering coating that displays an image projected from the video projector.
  • a video projection system comprising a transparent screen.
  • the image projection system of the present invention is an image projection system using a light scattering film, and the image projection system includes an image projector and a light scattering film for displaying an image projected from the image projector.
  • a window including the transparent screen, and the image projector is disposed on the indoor side, and the transmitted light projected from the image projector and transmitted through the window including the transparent screen and transmitted to the outside is the light. It is preferable that the image projection system attenuates according to the incident light angle dependency of the visible light transmittance of the control film.
  • the incident light angle ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °) from the image projector is an angle where the visible light transmittance TVIS ( ⁇ ) is 35% or less, direct transmitted light can be cut, Since there are no safety problems, more options are available for the environment in which the video projection system can be used.
  • the substrate of the transparent screen is a glass substrate
  • an image projection system can be provided in which the outdoor side is a glass substrate (FIG. 3). Since durability is sufficiently ensured by using a glass substrate on the outdoor side which is severe as an environment, it is more preferable.
  • TVIS ( ⁇ ) The visible light transmittance TVIS ( ⁇ ) was calculated according to JIS R3106: 1998 from the transmission spectrum measured by making light incident on the transparent screen at an incident light angle ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °).
  • ⁇ ⁇ 90 ° ⁇ ⁇ 90 °
  • a spectrophotometer V670 manufactured by JASCO Corporation was used as a measuring device.
  • TVIS (0 °) ⁇ 50% was judged to have good transparency.
  • TVIS ( ⁇ ) The visible light transmittance TVIS ( ⁇ ) was calculated from the transmission spectrum measured by making light incident on the transparent screen at an incident light angle ⁇ ( ⁇ 90 ° ⁇ ⁇ 90 °) according to JIS R3106: 1998.
  • ⁇ ⁇ 90 ° ⁇ ⁇ 90 °
  • JIS R3106 JIS R3106
  • a spectrophotometer V670 manufactured by JASCO Corporation was used as a measuring device.
  • the ⁇ direction was set to be perpendicular to the ⁇ direction.
  • the haze of the transparent screen was measured using a haze meter (manufactured by Suga Test Instruments, HZ-T) in accordance with the standard of JIS K7136.
  • the angle dependence of haze was measured by using a spectroscopic haze meter (SH7000, manufactured by Nippon Denshoku Industries Co., Ltd.) and using the attached angle changing attachment to make light incident on the transparent screen at an angle ⁇ .
  • Example 1 (Preparation of base material) The surface of a clear float glass plate of 100 mm square with a plate thickness of 4.0 mm was polished with cerium oxide, washed with ion-exchanged water, and dried to prepare a glass substrate.
  • the total solid content is (1) Zirconium oxide particles + (2) SiO 2 equivalent of TEOS + (3) R-SiO 3/2 equivalent of GPTMS (R is 3-glycidyloxy Propyl group).
  • the light-scattering film-forming coating solution A is applied to the surface of the substrate by a spin coating method at a rotation speed of 500 rpm, and then baked in an electric furnace at 260 ° C. for 10 minutes to form a light-scattering film.
  • a glass substrate was prepared.
  • a commercially available viewing angle control film (Y-2555, manufactured by Lintec) provided with a light control film was pasted on the light scattering film.
  • the direction in which the viewing angle is controlled (the direction of the oblique layer structure formed on the film) is set to ⁇ in FIG. 5, and the direction perpendicular to the in-plane direction is set to ⁇ .
  • Example 2 In the preparation of the coating solution A for forming a light-scattering film, the total solid content concentration is 5.0% by mass, the zirconium oxide particle concentration in the total solid content is 4.0% by mass (ethanol (68.92 g), ion-exchanged water (8 .44 g), tetraethoxysilane (TEOS, 8.33 g), ⁇ -glycidoxypropyltrimethoxysilane (GPTMS, 3.55 g), 1 N nitric acid (0.76 g), zirconium oxide particle dispersion A (10. 00g)), except that a light-scattering film was prepared. When the image was projected using a projector, the glare of the directly transmitted light was sufficiently suppressed while the image could be clearly confirmed.
  • Example 3 In (Preparation of coating solution for forming light-scattering film), the coating solution B for forming light-scattering film described later is used in place of coating solution A for forming light-scattering film, and the rest is carried out in the same manner as Example 1. did.
  • the total solid content is (1) diamond particles + (2) SiO 2 equivalent of TEOS + (3) R-SiO 3/2 equivalent of GPTMS (R is 3-glycidyloxypropyl) Base).
  • Example 2 The procedure was the same as Example 1 except that the light control film was not provided. When the image was projected using a projector, the image could be confirmed, but the directly transmitted light was dazzling.
  • Example 3 The procedure was the same as Example 1 except that no light-scattering film was provided. When the image was projected using a projector, the image was hardly confirmed from the position facing the transparent screen, but the direct transmitted light was suppressed.
  • Example 2 was performed except that no light control film was provided. When the image was projected using a projector, the image was clearly confirmed, but the direct transmitted light was dazzling.
  • Example 5 A clear float glass plate of the base material was the same as Example 1 except that the visible float was reduced as a green float glass plate. When the image was projected using a projector, the image could be confirmed, but the directly transmitted light was dazzling.
  • the substrate at least the light-scattering film that displays the projected image on the substrate, and the incident light angle dependency of the visible light transmittance are shown. It is a transparent screen characterized by having a light control film to be controlled. When images are projected on these transparent screens, the sharpness of the projected images is good and safety problems are less likely to occur. Was made.
  • the transparent screen of the present invention maintains the sharpness of the projected image and hardly causes a safety problem
  • advertisements are displayed on the window glass of a convenience store, the show window of a commercial building in a city, or a guide board. It can be used as a transparent screen.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Projection Apparatus (AREA)

Abstract

La présente invention concerne un écran transparent caractérisé en ce qu'il présente un matériau de base et, sur le matériau de base, au moins un revêtement à diffusion de lumière destiné à afficher une image projetée et un film de commande de lumière destiné à supprimer la dépendance à l'angle de lumière incidente du facteur de transmission de lumière visible. La présente invention permet de fournir un écran transparent présentant un revêtement à diffusion de lumière, avec lequel il est possible de supprimer la lumière de transmission directe tout en maintenant la netteté de l'image projetée et la transparence de l'écran transparent.
PCT/JP2017/034614 2016-12-14 2017-09-26 Écran transparent WO2018110031A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2016-242345 2016-12-14
JP2016242345 2016-12-14
JP2016255239 2016-12-28
JP2016-255239 2016-12-28
JP2017017228A JP2018106138A (ja) 2016-12-14 2017-02-02 透明スクリーン
JP2017-017228 2017-08-09

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WO2018110031A1 true WO2018110031A1 (fr) 2018-06-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020039891A1 (fr) * 2018-08-23 2020-02-27 セントラル硝子株式会社 Écran transparent et procédé de production pour celui-ci

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6477001A (en) * 1986-12-18 1989-03-23 Sumitomo Chemical Co Light control plate and its production
JPH03200949A (ja) * 1989-10-13 1991-09-02 Sumitomo Chem Co Ltd プロジェクション用スクリーン
JPH11202417A (ja) * 1997-11-13 1999-07-30 Denso Corp ホログラムスクリーン
JP2001005101A (ja) * 1999-06-17 2001-01-12 Toppan Printing Co Ltd 投影用スクリーンとそれを用いた投射型画像表示装置
JP2002277639A (ja) * 2001-01-09 2002-09-25 Denso Corp ホログラムスクリーン及びホログラムディスプレイ
JP2009157250A (ja) * 2007-12-27 2009-07-16 Sumitomo Chemical Co Ltd 光制御膜積層体及びそれを用いたプロジェクション用スクリーン

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6477001A (en) * 1986-12-18 1989-03-23 Sumitomo Chemical Co Light control plate and its production
JPH03200949A (ja) * 1989-10-13 1991-09-02 Sumitomo Chem Co Ltd プロジェクション用スクリーン
JPH11202417A (ja) * 1997-11-13 1999-07-30 Denso Corp ホログラムスクリーン
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