Exhibition device and exhibition method

Abstract

To provide an exhibition device and an exhibition method with which it is possible to have an observer simultaneously recognize a video from both a first and a second surface side of a screen by a simple structure.SOLUTION: Provided is an exhibition device 10 for exhibiting a video. According to an aspect of the present invention, the exhibition device 10 comprises: a screen 12 for displaying a video and having a first surface 12A and a second surface 12B which is on the reverse side from the first surface 12A; and a projector 13 for projecting a video to the screen 12 from the first surface side 12A of the screen 12. The screen 12 is composed of one sheet of screen member and has the function to display a video on both the first surface 12A and the second surface 12B.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an exhibition device and an exhibition method. [Background technology]

[0002] Conventionally, in showrooms and the like, videos related to products are sometimes exhibited for sales promotion purposes. An exhibition device for exhibiting such videos is provided with a screen for displaying the video, and by displaying the video on the screen, the video can be recognized by an observer.

[0003] Such exhibition devices are designed so that viewers will view the images from the front side of the screen, but there is a demand for viewers positioned on the rear side of the exhibition device to also view the images.

[0004] Currently, a known technology for displaying images on both sides of a screen is one that uses a transmission-reflection dual-use projection screen that includes a reflective screen and a transmission screen that transmits light of a specific polarization component different from that of the image light that is not reflected by the reflective screen and is transmitted through the screen (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-227581 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology in Patent Document 1 has a screen that has a laminated structure of a reflective screen and a transmissive screen made of special functional materials, and has a complex mechanism that uses a polarizing plate in the projector to switch between reflecting and transmitting image light.

[0007] The present invention has been made to solve the above problems, and aims to provide an exhibition device and an exhibition method that enable an observer to simultaneously view images from both the first and second sides of a screen using a simple structure. [Means for solving the problem]

[0008] The present invention includes the following inventions. [1] An exhibition device for exhibiting images, comprising: a screen having a first surface and a second surface opposite to the first surface, for displaying images; and a projector for projecting the images onto the screen from the first surface side of the screen, wherein the screen is constructed from a single screen member and has a function of displaying the images on both the first surface and the second surface.

[0009] [2] The display device described in [1] above, further comprising the anti-reflection film, and the screen is provided on the anti-reflection film.

[0010] [3] The display device described in [1] above, wherein the opacity of the screen is greater than or equal to 10.0% and less than or equal to 85.0%.

[0011] [4] The display device described in [2] above, wherein the opacity of the screen is greater than or equal to 10.0% and less than or equal to 85.0%.

[0012] [5] In a darkroom environment, a white image with a brightness of 2000 lumens is projected onto the entire surface of the first surface of the screen, and the luminance of the first surface located on the first surface side of the screen and the luminance of the second surface located on the second surface side of the screen at the overlapping portion between the screen and the anti-reflection film are both 48 cd / m 2 The above is the display device described in [2] above.

[0013] [6] The exhibition device described in any one of [1] to [5] above, wherein when the normal direction of the first surface of the screen is defined as the X-axis direction, a direction located within the first surface and perpendicular to the X-axis direction is defined as the Y-axis direction, and a direction located within the first surface and perpendicular to the X-axis direction and the Y-axis direction is defined as the Z-axis direction, the projector has the function of projecting an image rotating around the Z-axis direction as an axis of rotation onto the first surface of the screen.

[0014] [7] The exhibition device described in [1] to [6] above, wherein when the normal direction of the first surface of the screen is defined as the X-axis direction, a direction located within the first surface and perpendicular to the X-axis direction is defined as the Y-axis direction, and a direction located within the first surface and perpendicular to the X-axis direction and the Y-axis direction is defined as the Z-axis direction, the projector has the function of projecting, onto the first surface of the screen, an image that rotates around an axis that is tilted from the Z-axis direction toward the Y-axis direction by more than 0 degrees and not more than 45 degrees.

[0015] [8] The exhibition device of claims 1 to 7 above, wherein the projector has a function of projecting an image in which at least a portion of the image is mirror-inverted onto the first surface of the screen.

[0016] [9] A method for exhibiting an image, comprising: arranging a projector on the first surface side of a screen having a first surface and a second surface opposite the first surface; and projecting an image from the projector onto the first surface of the screen, wherein the screen is constructed from a single screen member and has a function of displaying the image on both the first surface and the second surface. Effect of the Invention

[0017] According to the present invention, it is possible to provide an exhibition device and an exhibition method that enable an observer to simultaneously view images from both the first surface side and the second surface side of a screen with a simple structure. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of a display device according to an embodiment. [Diagram 2] FIG. 2 is a front view of the anti-reflection film and the screen according to the embodiment. [Diagram 3] FIG. 3 is a cross-sectional view of the anti-reflection film and the screen according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of another antireflection film and a screen according to the embodiment. [Diagram 5] FIG. 5 is a cross-sectional view of an anti-reflection film according to an embodiment and another screen. [Figure 6] FIG. 6A is a front view of another screen according to the embodiment, and FIG. 6B is a cross-sectional view taken along line II of FIG. 6A. [Figure 7] Figure 7A is a schematic diagram showing the appearance of a first surface of a screen when an image is projected onto the first surface of a screen of an exhibition device according to an embodiment, and Figure 7B is a schematic diagram showing the appearance of a second surface of the screen when an image is projected onto the first surface of a screen of an exhibition device according to an embodiment. [Figure 8] 8A and 8B are schematic diagrams of other images projected from the projector of the exhibition apparatus according to the embodiment. [Figure 9] 9A and 9B are schematic diagrams of other images projected from the projector of the exhibition apparatus according to the embodiment. [Figure 10] FIG. 10 is a perspective view showing another supporting member according to the embodiment. [Figure 11] FIG. 11 is a perspective view showing another supporting member according to the embodiment. [Figure 12] FIG. 12 is an overhead view when measuring the luminance of the exhibition devices according to Examples 1 to 8 and Comparative Examples 1 and 2. As shown in FIG. [Figure 13] FIG. 13 is a diagram showing images projected from the projectors of the exhibition devices according to Examples 1 to 8 and Comparative Examples 1 and 2. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an exhibition device and an exhibition method according to a first embodiment of the present invention will be described with reference to the drawings. In this specification, the terms "film" and "sheet" are not distinguished from each other based only on the difference in name. Therefore, for example, "film" is used in a sense including a member also called a sheet. FIG. 1 is a perspective view of an exhibition device according to this embodiment, and FIG. 2 is a front view of an anti-reflection film and a screen according to this embodiment. FIG. 3 is a cross-sectional view of an anti-reflection film and a screen according to this embodiment, FIG. 4 is a cross-sectional view of another anti-reflection film and a screen according to the embodiment, FIG. 5 is a cross-sectional view of an anti-reflection film and another screen according to the embodiment, FIG. 6A is a front view of another screen according to this embodiment, and FIG. 6B is a cross-sectional view of FIG. 6A. FIG. 7A is a schematic diagram showing the state of the first surface when an image is projected on the first surface of the screen of the exhibition device according to this embodiment, and FIG. 7B is a schematic diagram showing the state of the second surface of the screen when an image is projected on the first surface of the screen of the exhibition device according to this embodiment. 8A, 8B, 9A, and 9B are schematic diagrams of other images projected from the projector of the exhibition device of this embodiment, and FIGS. 10 and 11 are perspective views showing other support members of this embodiment.

[0020] <<<Exhibition equipment>>> 1 is for displaying images, and includes an anti-reflection film 11, a screen 12 for displaying the images, a projector 13 for projecting the images onto the screen 12, a support member 14 for supporting the anti-reflection film 11, and an exhibit 15. Note that the exhibition device 10 does not necessarily have to include the anti-reflection film 11, the support member 14, and / or the exhibit 15.

[0021] The screen 12 is provided on a part of the anti-reflection film 11. The screen 12 shown in Fig. 1 is attached to the anti-reflection film 11 via an adhesive layer 16 as shown in Fig. 3. An exhibit 15 is fixed to the anti-reflection film 11.

[0022] <<Anti-reflection film>> The anti-reflection film 11 has a function of preventing reflection of external light. The anti-reflection film 11 is disposed in the projection direction of the image projected from the projector 13. From the viewpoint of suppressing external light reflection and giving the image a floating feeling, the visible light reflectance of the anti-reflection film 11 is preferably 2% or less, more preferably 1% or less. As a result, when an observer of the anti-reflection film 11 looks at the anti-reflection film 11 from the first surface 11A side of the anti-reflection film 11, reflection of external light or objects, for example, the observer's own figure, is suppressed, so that the observer is less likely to recognize the presence of the anti-reflection film 11. The visible light reflectance can be measured by the following method in accordance with JIS R3106:2019. First, light is irradiated onto the surface of the anti-reflection film 11 facing the projector 13 so that the angle of incidence is 5°. Then, the visible light reflectance is measured based on the specular reflection of the incident light. In this specification, the visible light reflectance is calculated based on the spectral data obtained at 10 nm intervals from 380 nm to 780 nm by irradiating light having wavelengths from 380 nm to 780 nm in accordance with JIS R3106:2019.

[0023] From the viewpoint of imparting a sense of floating in the air to the image, the anti-reflection film 11 is preferably transparent or semi-transparent, and more preferably transparent. In this specification, "transparent" means that the visible light transmittance is 60% or more. The visible light transmittance (JIS R3106:2019) of the anti-reflection film 11 is preferably 80% or more, 90% or more, 92% or more, or 95% or more. The visible light transmittance of the anti-reflection film 11 is measured as follows. First, a sample having a size of 30 mm x 30 mm is cut out from the anti-reflection film 11. Next, light including wavelengths from 380 nm to 780 nm is irradiated onto the surface of the sample so that the incident angle is 5°. Then, a spectrophotometer (manufactured by JASCO Corporation, "V-7100") is used to measure the transmission spectrum of light transmitted through the anti-reflection film at an angle of 5°, that is, the same angle as the incident angle. The measurement of the light transmission spectrum is performed at all wavelengths from 380 nm to 780 nm that differ by 10 nm. The visible light transmittance is calculated based on the measured transmission spectrum. The term "semi-transparent" in the context of anti-reflection films includes those that are colorless, white, or black.

[0024] The shape of the anti-reflection film 11 is not particularly limited, and examples thereof include a rectangular shape such as a rectangle or a square, a circular shape, an elliptical shape, etc. The anti-reflection film 11 has a rectangular shape as shown in Figs. 1 and 2.

[0025] The thickness of the anti-reflection film 11 is not particularly limited, but is preferably 500 μm or less. If the thickness of the anti-reflection film 11 is 500 μm or more, the transparency of the anti-reflection film 11 can be improved. The upper limit of the thickness of the anti-reflection film 11 may be 300 μm or less, or 250 μm or less. The lower limit of the thickness of the anti-reflection film 11 may be 60 μm or more from the viewpoint of obtaining stiffness and strength that can maintain the shape of the anti-reflection film 11. The thickness of the anti-reflection film 11 and the thickness of each layer described later can be calculated from the average value of the thicknesses of 20 points measured from a cross-sectional image taken using, for example, a scanning electron microscope (SEM), a transmission electron microscope (TEM), or a scanning transmission electron microscope (STEM). When the film thickness to be measured is on the order of μm, it is preferable to use SEM, and when it is on the order of nm, it is preferable to use TEM or STEM. In the case of SEM, the acceleration voltage is preferably 1 kV to 10 kV and the magnification is preferably 1,000 to 7,000 times, while in the case of TEM or STEM, the acceleration voltage is preferably 10 kV to 30 kV and the magnification is preferably 50,000 to 300,000 times.

[0026] The anti-reflection film 11 is not particularly limited as long as it has a function of preventing reflection of external light. For example, the anti-reflection film 11 is formed in this order on both sides of a core material film 111 with an anti-reflection layer 113, a base material 114, and an anti-reflection layer 113, with an adhesive layer 112 interposed therebetween, as shown in FIG. 3. The anti-reflection film 11 may be formed in such a manner that the anti-reflection layer 113, the base material 114, and an anti-reflection layer 113 are formed only on one side of the core material film 111 with an adhesive layer 112 interposed therebetween, as shown in FIG. 4. The anti-reflection film 11 does not need to include the core material film 111 and the adhesive layer 112.

[0027] <Core film> The core film 111 is intended to provide stiffness to the antireflection film 11. The thickness of the core film 111 is preferably 5 μm or more and 130 μm or less. If the thickness of the core film 111 is within this range, stiffness can be provided to the antireflection film 11. From the viewpoints of durability and handling properties, the thickness of the core film 111 may be 10 μm or more and 100 μm or less.

[0028] A plastic film, glass, etc. can be appropriately selected for the core material film 111. Examples of the plastic film include those made of various synthetic resins. Examples of synthetic resins include cellulose resins such as triacetyl cellulose resin (TAC), diacetyl cellulose, acetate butyrate cellulose, and cellophane; polyester resins such as polyethylene terephthalate resin (PET), polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, and polyester-based thermoplastic elastomer; polyolefin resins such as low-density polyethylene resin (including linear low-density polyethylene resin), medium-density polyethylene resin, high-density polyethylene resin, ethylene-α-olefin copolymer, polypropylene resin, polymethylpentene resin, polybutene resin, ethylene-propylene copolymer, propylene-butene copolymer, olefin-based thermoplastic elastomer, and mixtures thereof; acrylic resins such as poly(methyl (meth)acrylate resin, poly(ethyl (meth)acrylate resin, and poly(butyl (meth)acrylate resin); polyamide resins such as nylon 6 or nylon 66; polystyrene resin; polycarbonate resin; polyarylate resin; or polyimide resin. The core material film may be used alone or as a mixture of two or more of the above plastic films.

[0029] Among plastic films and glass, from the viewpoint of providing stiffness to the anti-reflection film, polyethylene terephthalate resin (PET), acrylic resin, polycarbonate resin, glass, etc. are preferred. Also, from the viewpoint of providing strength to the anti-reflection film, acrylic resin is preferred.

[0030] <Adhesive layer> The adhesive layer 112 is for bonding the core film 111 to the anti-reflection layer 113, etc. The adhesive layer 112 is not particularly limited, but may be, for example, an optically transparent adhesive layer (OCA layer).

[0031] <Base material> The thickness of the base material 114 is not particularly limited and may be appropriately selected depending on the application, but is usually 5 μm to 130 μm, and preferably 10 μm to 100 μm in consideration of durability, handling, and the like.

[0032] Examples of the substrate 114 include films similar to those used for the core film 111. Among these, from the standpoint of flexibility, toughness, transparency, etc., cellulose resin and polyester resin are more preferred, and triacetyl cellulose resin (TAC) and polyethylene terephthalate resin (PET) are even more preferred.

[0033] <Anti-reflection layer> The antireflection layer 113 includes a high refractive index layer 113A and a low refractive index layer 113B. The antireflection layer 113 is not particularly limited as long as it has an antireflection function, and may be, for example, a laminated structure of a medium refractive index layer, a high refractive index layer, and a low refractive index layer, or may be a single layer structure of a low refractive index layer. The high refractive index layer and the low refractive index layer have the role of imparting the antireflection function by the optical interference function of the multilayer thin film.

[0034] (High refractive index layer) The high refractive index layer 113A can be formed, for example, from a high refractive index layer coating liquid containing a curable resin composition and high refractive index particles. It is preferable that the high refractive index layer 113A has a high refractive index from the viewpoint of making the anti-reflection film have an ultra-low reflectance, but a large amount of high refractive index particles is required to increase the refractive index, which leads to aggregation of the high refractive index particles and causes whitening. For this reason, the refractive index is preferably 1.55 to 1.85, more preferably 1.56 to 1.70.

[0035] The thickness of the high refractive index layer 113A is preferably 200 nm or less, and more preferably 50 nm or more and 180 nm or less. When the high refractive index layer has a two-layer structure described later, it is preferable that the total thickness of the two layers satisfies the above value.

[0036] Furthermore, high refractive index layer 113A may be formed from a plurality of layers that satisfy the above range of refractive index, but from the viewpoint of cost-effectiveness, two layers or less are preferable, and a single layer is more preferable.

[0037] Examples of high refractive index particles include antimony pentoxide (1.79), zinc oxide (1.90), titanium oxide (2.3 to 2.7), cerium oxide (1.95), tin-doped indium oxide (1.95 to 2.00), antimony-doped tin oxide (1.75 to 1.85), yttrium oxide (1.87), and zirconium oxide (2.10). Note that the above numbers in parentheses indicate the refractive index of the material of each particle.

[0038] Among these high refractive index particles, those with a refractive index of more than 2.0 are preferred from the viewpoint of achieving the above-mentioned suitable refractive index with a small amount of addition. In addition, conductive high refractive index particles such as antimony pentoxide, tin-doped indium oxide (ITO), and antimony-doped tin oxide (ATO) have free electrons whose plasma frequency is in the near infrared region, and due to the plasma oscillation of the free electrons, light in the visible light region is partially absorbed or reflected, which may make it difficult to suppress the color tone. For this reason, it is preferable that the high refractive index particles are non-conductive.

[0039] From the above, among the high refractive index particles exemplified above, titanium oxide and zirconium oxide are suitable, and zirconium oxide is the most suitable from the viewpoint of high durability and stability such as light resistance, etc. If it is desired to impart antistatic properties to the antireflection film, it is preferable that the high refractive index layer has a two-layer structure as described below, and one of the layers contains conductive high refractive index particles.

[0040] The average particle size of the primary particles of the high refractive index particles is preferably 5 nm to 200 nm, more preferably 5 nm to 100 nm, and even more preferably 10 to 80 nm. The average particle size of the primary particles of the high refractive index particles and the low refractive index particles described later can be calculated by the following steps (1) to (3). (1) A surface image of the particles themselves, or a particle dispersion liquid coated on a substrate and dried, is taken using an SEM, TEM, or STEM. (2) Randomly extract 10 particles from the surface image, measure the long and short diameters of each particle, and calculate the particle diameter of each particle from the average of the long and short diameters. Note that the longest diameter is the longest diameter on the screen, and the short diameter is the distance between the two points where a line segment perpendicular to the midpoint of the line segment constituting the long diameter intersects with the particle. (3) The same procedure was carried out five times for imaging another screen of the same sample, and the value obtained by averaging the particle diameters of a total of 50 particles was taken as the average particle diameter. When calculating the average particle diameter of particles, if the average particle diameter to be calculated is on the order of μm, it is preferable to use SEM, and if the average particle diameter to be calculated is on the order of nm, it is preferable to use TEM or STEM. In the case of SEM, the acceleration voltage is preferably 1 to 10 kV and the magnification is preferably 1,000 to 7,000 times, and in the case of TEM or STEM, the acceleration voltage is preferably 10 to 30 kV and the magnification is preferably 50,000 to 300,000 times.

[0041] From the viewpoint of a balance between increasing the refractive index, suppressing color tone, and suppressing whitening, the content of the high refractive index particles is preferably 30 to 400 parts by mass, more preferably 50 to 200 parts by mass, and even more preferably 80 to 150 parts by mass, relative to 100 parts by mass of the curable resin composition.

[0042] The high refractive index layer 113A is preferably dispersion stabilized in order to suppress excessive aggregation of the high refractive index particles. For example, a means for dispersion stabilization is a means for adding another high refractive index particle having a smaller surface charge amount than the base high refractive index particle. According to this means, the base high refractive index particles are appropriately gathered around the other high refractive index particles, and the base high refractive index particles can be suppressed from excessive aggregation. In addition, another means for dispersion stabilization is a means for using surface-treated high refractive index particles or adding a dispersant to the high refractive index layer coating liquid.

[0043] The curable resin composition for forming the high refractive index layer 113A is preferably an ionizing radiation curable resin composition. In order to obtain the above-mentioned refractive index without adding an excessive amount of high refractive index particles, it is preferable to use a curable resin composition with a high refractive index. The refractive index of the curable resin composition is preferably about 1.54 to 1.70.

[0044] Moreover, the high refractive index layer 113A may have a two-layer structure of a high refractive index layer (A) located on the substrate 114 side and a high refractive index layer (B) located on the low refractive index layer side. In this case, it is preferable that the refractive index of the high refractive index layer (B) is higher than that of the high refractive index layer (A). By configuring the high refractive index layer in this way, the refractive index difference with the low refractive index layer can be increased, the reflectance can be reduced, and the refractive index difference between the high refractive index layer and the substrate can be reduced, suppressing the occurrence of interference fringes.

[0045] When the high refractive index layer has a two-layer structure, it is preferable that the refractive index of the high refractive index layer (A) is 1.55 or more and 1.70 or less, and the refractive index of the high refractive index layer (B) is 1.60 or more and 1.85 or less.

[0046] Furthermore, in the above two-layer structure, it is preferable that one of the high refractive index layer (A) and the high refractive index layer (B) contains conductive high refractive index particles, and the other contains non-conductive high refractive index particles, and that the thickness of the layer containing conductive high refractive index particles is less than the thickness of the layer containing non-conductive high refractive index particles. This structure makes it possible to impart antistatic properties while suppressing the amount of conductive high refractive index particles added, which may cause coloring. In addition, the conductive high refractive index particles are preferable in that they can be networked within the layer to impart antistatic properties with a small amount of addition, thereby suppressing coloring and whitening.

[0047] The high refractive index layer 113A can be formed by preparing a coating liquid for forming a high refractive index layer using high refractive index particles, a curable resin composition, and additives such as an ultraviolet absorber and a leveling agent, which are blended as necessary, and a dilution solvent, and applying the coating liquid onto a hard coat layer by a conventionally known coating method, drying the coating liquid, and curing the coating liquid by irradiation with ionizing radiation as necessary.

[0048] (Low refractive index layer) The low refractive index layer 113B is a layer having a refractive index lower than that of the high refractive index layer 113A. The low refractive index layer 113B preferably has a refractive index of 1.26 or more and 1.36 or less in order to provide the antireflection film with an ultra-low reflectance. The lower limit of the refractive index of the low refractive index layer 113B is more preferably 1.28 or more or 1.30 or more, and the upper limit is more preferably 1.34 or less, or 1.32 or less.

[0049] The lower the refractive index of the low refractive index layer 113B, the lower the refractive index of the antireflection film 11 can be without increasing the refractive index of the high refractive index layer 113A too much. On the other hand, if the refractive index of the low refractive index layer 113B is too low, the strength of the low refractive index layer 113B tends to decrease. Therefore, by setting the refractive index of the low refractive index layer 113B within the above range, the amount of high refractive index particles added to the high refractive index layer 113A can be reduced while maintaining the strength of the low refractive index layer 113B, which is preferable in terms of suppressing color and whitening.

[0050] The low refractive index layer 113B may be formed of a plurality of layers that satisfy the above range of refractive index, but from the viewpoint of cost-effectiveness, two layers or less are preferable, and a single layer is more preferable.

[0051] The thickness of the low refractive index layer 113B is preferably 80 nm or more and 120 nm or less. The lower limit of the thickness of the low refractive index layer 113B is more preferably 85 nm or more or 90 nm or more, and the upper limit is more preferably 110 nm or less or 105 nm or less.

[0052] The method for forming the low refractive index layer 113B can be roughly divided into a wet method and a dry method. Examples of the wet method include a method of forming the layer by a sol-gel method using a metal alkoxide or the like, a method of forming the layer by coating a resin having a low refractive index such as a fluororesin, and a method of forming the layer by coating a coating liquid for forming a low refractive index layer in which low refractive index particles are contained in a resin composition. Examples of the dry method include a method of selecting particles having a desired refractive index from the low refractive index particles described later and forming the layer by a physical vapor deposition method or a chemical vapor deposition method.

[0053] The wet method is excellent in terms of production efficiency, and in the present invention, among the wet methods, it is preferable to form the low refractive index layer using a coating liquid for forming the low refractive index layer, which is a resin composition containing low refractive index particles.

[0054] Low refractive index particles are preferably used for the purpose of lowering the refractive index, i.e., improving the antireflection properties. Either inorganic particles such as silica or magnesium fluoride, or organic particles can be used without restriction. From the viewpoint of further improving the antireflection properties and ensuring good surface hardness, however, particles having a structure in which the particles themselves have voids are preferably used.

[0055] Particles having a structure with voids themselves have fine voids inside, and for example, are filled with a gas such as air with a refractive index of 1.0, so that the refractive index of the particles themselves is low. Examples of such particles with voids include inorganic or organic porous particles and hollow particles, such as porous silica, hollow silica particles, and porous polymer particles and hollow polymer particles using acrylic resin. Examples of inorganic particles include silica particles with voids prepared using the technology disclosed in JP-A-2001-233611, and examples of organic particles include hollow polymer particles prepared using the technology disclosed in JP-A-2002-80503. The refractive index of the above-mentioned silica or porous silica with voids is in the range of 1.18 to 1.44, which is lower than that of general silica particles with a refractive index of about 1.45, and is therefore preferable from the viewpoint of lowering the refractive index of the low refractive index layer.

[0056] The hollow silica particles are particles that have the function of lowering the refractive index of the low refractive index layer while maintaining the coating strength of the layer. The hollow silica particles used in the present invention are silica particles with a structure having a cavity inside. The hollow silica particles are silica particles whose refractive index is lowered inversely proportional to the occupancy rate of the internal cavity compared to the inherent refractive index of the silica particles (refractive index n=about 1.45). Therefore, the refractive index of the hollow silica particles as a whole is 1.18 or more and 1.44 or less.

[0057] The hollow silica particles are not particularly limited, and examples thereof include particles having an outer shell and a porous or hollow interior, and silica particles prepared using the techniques disclosed in JP-A-6-330606, JP-A-7-013137, JP-A-7-133105, and JP-A-2001-233611.

[0058] The average particle size of the primary particles of the low refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and even more preferably 10 nm or more and 80 nm or less. If the average particle size of the primary particles is within the above range, the transparency of the low refractive index layer is not impaired and a good particle dispersion state is obtained. In particular, hollow particles are used as the low refractive index particles, and the average particle size of the hollow particles is 70 nm or more and 80 nm or less, which is preferable in that it can increase the porosity and reduce the refractive index while maintaining a shell thickness that does not cause insufficient strength, and is also excellent in balance with the ideal low refractive index layer thickness (about 100 nm) for reducing reflectance.

[0059] The low refractive index particles are preferably surface-treated. As the surface treatment of the low refractive index particles, a surface treatment using a silane coupling agent is more preferable, and among these, a surface treatment using a silane coupling agent having a (meth)acryloyl group is preferable. By subjecting the low refractive index particles to a surface treatment, the affinity with the binder resin described below is improved, the dispersion of the particles becomes uniform, and the aggregation of the particles is unlikely to occur, so that the decrease in the transparency of the low refractive index layer due to the increase in particle size caused by aggregation, the applicability of the composition for forming the low refractive index layer, and the decrease in the coating strength of the composition are suppressed.

[0060] In addition, when the silane coupling agent has a (meth)acryloyl group, the silane coupling agent has ionizing radiation curing properties, and therefore easily reacts with the binder resin described below, so that the low refractive index particles are well fixed to the binder resin in the coating film of the composition for forming the low refractive index layer. That is, the low refractive index particles function as a crosslinking agent in the binder resin. This provides a tightening effect on the entire coating film, and makes it possible to impart excellent surface hardness to the low refractive index layer while retaining the inherent flexibility of the binder resin. Therefore, the low refractive index layer deforms by making use of its own flexibility, and has the ability to absorb and restore external impacts, so that the occurrence of scratches is suppressed, resulting in a high surface hardness with excellent scratch resistance.

[0061] Examples of silane coupling agents that are preferably used in the surface treatment of low refractive index particles include 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, 3-(meth)acryloxypropylmethyldimethoxysilane, 3-(meth)acryloxypropylmethyldiethoxysilane, 2-(meth)acryloxypropyltrimethoxysilane, and 2-(meth)acryloxypropyltriethoxysilane.

[0062] The content of the low refractive index particles in the low refractive index layer 113B is preferably 10 parts by mass to 250 parts by mass, more preferably 50 parts by mass to 200 parts by mass, and even more preferably 100 parts by mass to 180 parts by mass, relative to 100 parts by mass of the resin of the low refractive index layer 113B. When the content of the low refractive index particles is within the above range, good antireflection properties and surface hardness can be obtained.

[0063] The proportion of hollow particles and / or porous particles in all low refractive index particles contained in the low refractive index layer 113B is preferably 70 mass % or more, more preferably 80 mass % or more, and even more preferably 80 mass % to 95 mass %.

[0064] Resin compositions contained in the coating liquid for forming a low refractive index layer include, first, curable resin compositions. As the curable resin composition, an ionizing radiation curable resin composition is preferable. In addition, as the resin composition, a fluorine-containing polymer or a fluorine monomer that itself exhibits a low refractive index is also preferably used. The fluorine-containing polymer is a polymer of a polymerizable compound that contains at least a fluorine atom in the molecule, and is preferable in that it can impart antifouling properties and slip properties. The fluorine-containing polymer is preferably one that has a reactive group in the molecule and functions as a curable resin composition, and more preferably one that has an ionizing radiation curable reactive group and functions as an ionizing radiation curable resin composition.

[0065] The low refractive index layer 113B can be formed, for example, by preparing a coating liquid for forming a low refractive index layer using low refractive index particles, a resin composition, additives such as an ultraviolet absorber and a leveling agent that are blended as necessary, and a diluting solvent, and applying the coating liquid onto the high refractive index layer by a conventionally known coating method, drying, and curing by exposure to ionizing radiation as necessary.

[0066] <<Screen>> The screen 12 shown in FIG. 1 is provided on the first surface 11A of the anti-reflection film 11, but the screen 12 may also be provided on the second surface 11B, which is the surface opposite to the first surface 11A of the anti-reflection film 11, as shown in FIG. 5.

[0067] The screen 12 is composed of one screen member. In this specification, "one screen member" means that there is one member that functions as a screen. In other words, it does not include two screen members as in Patent Document 1. Furthermore, the screen 12 may have a single layer structure or a laminated structure of two or more layers, so long as it is composed of one member that functions as a screen.

[0068] As shown in Fig. 3, the screen 12 has a first surface 12A and a second surface 12B opposite to the first surface 12A. In Fig. 3, the screen 12 is provided on the antireflection film 11 such that the second surface 12B faces the antireflection film 11.

[0069] The screen 12 has a function of displaying an image on both the first surface 12A and the second surface 12B. The screen 12 is a reflective-transmissive screen that reflects some images and transmits other images, so that an image can be displayed on both the first surface 12A and the second surface 12B. In this specification, "the screen has a function of displaying an image on both the first surface and the second surface" means that the screen has a function of displaying an image so that an observer can understand the projected image on both the first surface and the second surface.

[0070] The screen 12 is made of a screen material. The screen material is not particularly limited, but examples thereof include paper, synthetic paper, and resin sheets with anti-reflection treatment on the surface. Examples of the paper include tracing paper, Japanese paper, and coated paper such as A2 coated paper.

[0071] The opacity of the screen 12 is preferably 10.0% or more and 85.0% or less. If the opacity of the screen 12 is 10.0% or more, the image does not pass through the first surface 12A too much, and the image can be displayed on the first surface 12A, and if the opacity is 85.0% or less, the image is not blocked too much by the first surface 12A, and the image can be displayed on the second surface 12B. The lower limit of the opacity of the screen 12 is more preferably 20.0% or more, 35.0% or more, or 45.0% or more, and the upper limit is more preferably 80.0% or less, 75.0% or less, or 70.0% or less. If the opacity of the screen 12 is 25.9% or more and 72.5% or less, the difference in luminance between the first surface OL1 and the second surface OL2 of the overlapping portion OL described later is small, and a good balance is achieved, which is preferable.

[0072] The opacity (%) of the screen 12 can be obtained as follows. When the screen 12 can be peeled off from the anti-reflection film 11, the screen 12 is peeled off from the anti-reflection film 11, and then the optical density OD of the screen 12 is measured using a transmission densitometer (for example, product name "341C" manufactured by X-Rite). The relationship between the optical density OD and the transmittance T (%) is expressed by the following formula (1), so the transmittance T (%) can be obtained by the following formula (2). OD = -log(T / 100) ... Equation (1) T=10 (-OD) ×100…Formula (2)

[0073] Since the opacity OP (%) and the transmittance T (%) complement each other, the relationship of the following formula (3) holds, and therefore the opacity OP can be calculated from the following formula (3). OP=1-T=1-10 (-OD) ×100…Formula (3)

[0074] Furthermore, when the opacity of the anti-reflection film is 0%, the optical density OD of the overlapping portion OL of the screen 12 and the anti-reflection film 11 is measured using a transmission densitometer (for example, product name "341C" manufactured by X-Rite). Thereafter, the opacity OP of the overlapping portion OL of the screen 12 and the anti-reflection film 11 is obtained by the same method as above, but when the opacity of the anti-reflection film 11 is 0%, the opacity OP of the overlapping portion OL of the screen 12 and the anti-reflection film 11 can be regarded as the opacity of the screen 12, so the opacity OP of the screen 12 can be obtained.

[0075] In a darkroom environment (0.2 Lx or less), a white image with a brightness of 2000 lumens (lm) was projected onto the entire surface of the first surface 12A of the screen 12. The luminance of the first surface OL1 located on the first surface 12A side of the screen 12 and the luminance of the second surface OL2 located on the second surface 12B side of the screen 12 at the overlapping portion OL between the screen 12 and the anti-reflection film 11 were both 48 cd / m 2 It is preferable that the luminance of the first surface OL1 and the second surface OL2 is 48 cd / m 2 If this is the case, the visibility of the images displayed on the first screen OL1 and the second screen OL2 will be good. Here, the Direct View Display D-Cinema Addendum (dcimovies.com) of the Digital Cinema International (DCI) states that the value when a white image is projected onto the entire screen in a movie theater light-out environment is 48 cd / m 2 It is recommended that the luminance of the first surface OL1 and the second surface OL2 be 55 cd / m or more. 2 Above, 80cd / m 2 or above 90cd / m 2 The upper limit of the luminance of the first surface OL1 and the second surface OL2 is 340 cd / m 2The luminance of the first surface OL1 and the second surface OL2 of the overlapping portion OL can both be measured using a luminance measuring device (product name "2D Luminance Colorimeter CA-2500", manufactured by Konica Minolta, Inc.). The first surface OL1 is one surface of the overlapping portion OL, and the second surface OL2 is the other surface of the overlapping portion.

[0076] The thickness of the screen 12 is not particularly limited, but may be, for example, 50 μm or more and 170 μm or less. The basis weight of the screen 12 is not particularly limited, but may be, for example, 30 g / m 2 More than 190g / m 2 It may be the following.

[0077] The screen 12 is attached to the anti-reflection film 11 via an adhesive layer 16, but it is preferable that the screen 12 is replaceable so that the color tone and size of the screen 12 can be changed to suit the exhibition environment. There is no particular limitation on such a replaceable screen 12, but it is possible to use an electrostatic adhesion sheet (for example, Yupo Electrostatic Adhesive (registered trademark) WESC165 manufactured by Yupo Corporation).

[0078] The screen 12 may be one in which an image projection layer 122 is formed on a transparent sheet 121 as shown in Fig. 6A and Fig. 6B. The transparent sheet 121 may be, for example, an electrostatic adhesion sheet. The image projection layer 122 may be formed, for example, by an inkjet method using an ionizing radiation curable transparent ink or white ink. The transparent ink is preferably a matte ink from the viewpoint of giving the image a more airborne feeling.

[0079] It is preferable that the image projection layer 122 has an opening 122A. By having the opening 122A in the image projection layer 122, an image can be displayed on the first surface 12A and the second surface 12B of the screen 12, and the transparency provided by the transparent sheet 121 can be maintained, so that the image can have a more floating-in-the-air feel. It is preferable that the aperture ratio of the image projection layer 122 is 25% or more and 75% or less. From the viewpoint of easily forming the opening 122A in the image projection layer 122, the opening 122A in the image projection layer 122 may be formed by forming the constituent material of the image projection layer 122 into a dot shape as shown in Figures 6A and 6B.

[0080] If the image projection surface of the screen is flat, it may cause glare on the image projection surface of the screen, which may reduce the sense of floating in the air. Therefore, in order to prevent the sense of floating in the air from being reduced, it is preferable that the image projection surface of the screen 12 is formed with fine irregularities. By having such fine irregularities, the image projection surface can be made into a matte surface, which can reduce glare.

[0081] The color tone of the screen 12 is not particularly limited, and may be, for example, white, black, or an intermediate color between white and black. The screen 12 may use different colors depending on the exhibition environment. For example, when the exhibition is mainly held in a bright environment such as daytime, a bright screen is preferable, so a screen with a light color tone such as translucency or white is preferable. When the exhibition is mainly held in a dark environment such as night, a dark screen is preferable, so a screen with a dark color tone such as black is preferable. The color tone of the screen may be other than white, black, or an intermediate color between white and black. Each color tone can be applied appropriately from a light state to a dark state.

[0082] The shape and size of the screen 12 are not particularly limited, and for example, the screen 12 shown in Fig. 1 is circular. The shape of the screen 12 is not particularly limited, and examples thereof include a rectangular shape such as a rectangle or a square, a circular shape, and an elliptical shape. The size of the screen 12 is not particularly limited as long as it does not cover the entire first surface or the second surface of the anti-reflection film 11, and can be any desired size.

[0083] <<Projector>> Projector 13 is for projecting an image onto screen 12, and is disposed on the first surface 12A side of screen 12. The image emitted from projector 13 is projected onto first surface 12A of screen 12 as shown in Fig. 7A. From the viewpoint of sales promotion, it is preferable that the image projected from projector 13 is an image of a product related to exhibit 15. For example, in the case of promoting the sales of canned drinks (e.g., canned beer), a beverage can is fixed to anti-reflection film 11 as exhibit 15, and an image related to the canned drink is displayed on screen 12.

[0084] Since the screen 12 has the function of displaying an image on both the first surface 12A and the second surface 12B, when an image is projected onto the first surface 12A of the screen 12, the image is displayed on the first surface 12A of the screen 12 as shown in Fig. 7A, and also on the second surface 12B of the screen 12 as shown in Fig. 7B. If the image includes a pattern such as letters or a logo mark, the image will be displayed correctly on the first surface 12A as shown in Fig. 7A, but on the second surface 12B, the letters or patterns will be displayed left-right reversed as shown in Fig. 7B, and the image will not be displayed correctly, so there is a risk that when a viewer views the image from the rear side (second surface 12B side) of the exhibition apparatus, the image will not be recognized correctly.

[0085] For this reason, as shown in FIG. 1, when the normal direction of the first surface 12A of the screen 12 is the X-axis direction, a direction located within the first surface 12A and perpendicular to the X-axis direction is the Y-axis direction, and a direction located within the first surface 12A and perpendicular to the X-axis direction and the Y-axis direction is the Z-axis direction, it is preferable that the projector 13 projects an image rotating around the Z-axis direction as the rotation axis onto the first surface 12A of the screen 12 as shown in FIG. 8A. By projecting a rotating image onto the first surface 12A of the screen 12 in this manner, even if the image includes a pattern such as a character or a logo mark, the image can be displayed so that the observer can accurately recognize the image not only on the first surface 12A but also on the second surface 12B. A projector having a function of rotating an image as described above includes an image control unit, and the image can be rotated by the image control unit. Note that the screen 12 shown in FIG. 1 is disposed substantially perpendicular to the floor surface, so that the Z-axis direction of the screen 12 is perpendicular to the floor surface. Also, the Y-axis direction of the screen 12 is parallel to the floor surface.

[0086] Furthermore, the projector 13 may project an image onto the first surface 12A of the screen 12, rotating around an axis tilted from the Z-axis direction toward the Y-axis direction by more than 0 degrees and not more than 45 degrees, preferably not more than 30 degrees, as shown in Fig. 8B. Even if the image rotates around an axis within such an angle range, it can be displayed not only on the first surface 12A but also on the second surface 12B so that the observer can accurately recognize the image. However, there is a risk that the observer will not be able to accurately recognize an image that rotates around an axis tilted from the Z-axis direction toward the Y-axis direction by an angle of more than 45 degrees.

[0087] The projector 13 of the exhibition device 10 may have a function to flip the image left and right as shown in Fig. 9A instead of or in addition to the function to rotate the image around the Z-axis direction as the rotation axis, or may have a function to move the image in the Y-axis direction and flip the image left and right as shown in Fig. 9B. Even if the projector has such a mechanism, and even if the image includes a pattern such as letters or a logo mark, the image can be displayed so that the observer can accurately recognize it not only on the first surface 12A but also on the second surface 12B.

[0088] The projector 13 having the above functions includes an image control section (not shown), and the image control section can rotate, move, or flip the image horizontally.

[0089] If the image projected from the projector 13 extends beyond the screen 12, the sense of floating in the air may be reduced, so it is preferable that the contour of the image projected from the projector 13 onto the screen 12 be adjusted to fit the contour of the screen 12.

[0090] In the case where a wall is present on the second surface 11B side of the anti-reflection film 11, if an image projected from the projector extends beyond the screen, the extended image may be reflected on the wall, reducing the sense of floating in the air. In contrast, if the projector 13 has a function of applying gradation processing to the contours of an image and projects an image with a gradation processing contour from the projector 13, even if the image projected from the projector 13 extends beyond the screen 12 in the case where a wall is present on the second surface 11B side of the anti-reflection film 11, the reflection on the wall becomes less noticeable, so that the reduction in the sense of floating in the air can be suppressed. Note that a projector having a function of applying gradation processing to the contours of an image is equipped with an image processing unit, and the image processing unit can apply gradation processing to the contours of the image.

[0091] <<Supporting member>> The support member 14 is for supporting the anti-reflection film 11. The support member 14 shown in Fig. 1 is a frame with legs that holds the outer periphery of the anti-reflection film 11. The support member 14 is not particularly limited as long as it can support the anti-reflection film 11, and may be, for example, a frame, a stand 17 that supports the anti-reflection film 11 from below as shown in Fig. 10, or a hanging member 18 that supports the anti-reflection film 11 by suspending it as shown in Fig. 11. From the viewpoint of suppressing a decrease in the floating feeling of the image, the support member 14 is preferably transparent or semi-transparent, and more preferably transparent.

[0092] <<Exhibits>> The exhibit 15 is fixed to the anti-reflection film 11. Specifically, the exhibit 15 is fixed to the first surface 11A side of the anti-reflection film 11. The method of fixing the exhibit 15 to the anti-reflection film 11 is not particularly limited, but if the fixing jig such as a metal fitting is visible to the observer, the sense of floating in the air is reduced, so it is preferable that the fixing jig is not visible to the observer. For example, if the material of the exhibit 15 is attracted to a magnet, a magnet may be placed on the second surface 11B (see FIG. 3) side of the anti-reflection film 11 to fix the exhibit 15 to the anti-reflection film 11, or a hole may be opened in the anti-reflection film 11 at the position where the exhibit 15 is to be fixed, and the exhibit may be fixed by a fixing jig such as a metal fitting through the hole from the second surface 11B side of the anti-reflection film 11.

[0093] The exhibit 15 may be either a two-dimensional exhibit or a three-dimensional exhibit. The exhibit 15 is not particularly limited, and examples thereof include a signboard, a product, a POP (point of purchase) advertisement, etc. The exhibit 15 shown in FIG. 1 is a beverage can.

[0094] <<Applications>> The display device 10 can be used in, but is not limited to, in-store sales promotions (for example, beverages, cosmetics, sporting goods, clothes, etc.), showrooms (for automobiles, etc.), event venues, art galleries, and museums.

[0095] <<<Display method>>> To display an image using the exhibition device 10, first, the exhibit 15 is fixed to the anti-reflection film 11. If the exhibition device does not have an exhibit 15, the exhibit 15 does not need to be fixed to the anti-reflection film 11.

[0096] With the screen 12 attached to a part of the anti-reflection film 11, an image is projected from the projector 13 onto the first surface 12A of the screen 12, and the image is displayed on the first surface 12A of the screen 12 as shown in Fig. 7A. Since the screen 12 has the function of displaying images on both the first surface 12A and the second surface 12B, the image is also displayed on the second surface 12B of the screen 12 as shown in Fig. 7B.

[0097] Furthermore, as described above, when projector 13 is used that has the function of rotating an image around an axis greater than 0 degrees and less than 45 degrees in the Z-axis direction or in the Y-axis direction as the rotation axis, and / or the function of inverting the image left and right, the rotated image or the inverted image left and right can be displayed on first surface 12A and second surface 12B of screen 12.

[0098] According to this embodiment, the screen 12 is constructed from a single screen member and has the function of displaying images on both the first surface 12A and the second surface 12B. Therefore, without using a layered structure of a reflective screen and a transmissive screen as in Patent Document 1, and without equipping the projector with a complex mechanism for switching between reflection and transmission, a simple structure allows an observer to recognize images simultaneously from both the first surface 12A side and the second surface 12B side of the screen 12.

[0099] Currently, in showrooms and the like, it is being considered to display images so that exhibits and images appear to float in the air for sales promotion. In order to give the exhibit a floating feeling, for example, it has been proposed to suspend the exhibit from a string from the ceiling, but in this case, the suspending string can be recognized. It has also been proposed to attach the exhibit to a transparent panel such as glass or acrylic resin, but in this case, the transparent panel's presence can be recognized due to reflection and reflection of external light from the transparent panel, so the floating feeling is not obtained. Also, in order to give the image a floating feeling, a method of displaying the image on a transparent screen using a transparent screen has been proposed, but the image does not give the illusion of floating in the air, that is, the image does not have a floating feeling. In contrast, according to this embodiment, the exhibit 15 is fixed to the anti-reflection film 11 and the screen 12 is provided on a part of the anti-reflection film 11, so that the reflection of external light can be suppressed by the anti-reflection film 11. This gives the sensation or impression that there is nothing around exhibit 15 and screen 12, and thus gives a floating sensation to exhibit 15 and the image displayed on screen 12. Also, the floating sensation can be given to such exhibit and image by the extremely simple method of fixing exhibit 15 to anti-reflection film 11 and providing screen 12 on part of anti-reflection film 11. This makes it possible to give the floating sensation to exhibit and image in a simple manner. EXAMPLES

[0100] In order to explain the present invention in detail, the following examples are given, but the present invention is not limited to these. Fig. 12 is an overhead view of the display devices according to Examples 1 to 8 and Comparative Examples 1 and 2 when measuring the luminance, and Fig. 13 is a diagram showing an image projected from the projector of the display devices according to Examples 1 to 8 and Comparative Examples 1 and 2.

[0101] <Example 1> First, a screen was prepared. A circular tracing paper 1 (product name "Classico Tracing-FS", manufactured by Mitsubishi Paper Mills Co., Ltd.) with a diameter of 60 cm was used as the screen. Next, the screen was fixed to the center of the anti-reflection film (manufactured by Dai Nippon Printing Co., Ltd., reflectance: 0.2% or less) with adhesive tape (product name "Cellotape (registered trademark)", manufactured by Nichiban Co., Ltd.) so that the second surface of the screen was the side of the anti-reflection film (manufactured by Dai Nippon Printing Co., Ltd., reflectance: 0.2% or less) with a length of 120 cm and a width of 145 cm, to prepare an anti-reflection film with a screen. The adhesive tape was attached to four points on the outer periphery of the screen so that the distance between the adhesive tapes was approximately equal.

[0102] The anti-reflection film with a screen was supported by a frame so that it was approximately vertical to the floor. The height of the screen was adjusted so that the center of the first surface of the screen was 1.51 m, which was about eye level. A projector (product name "CX-E1", manufactured by Casio Computer Co., Ltd.) was then placed on the first surface side of the screen at a position 1.591 m away from the center of the first surface of the screen, to obtain an exhibition device.

[0103] <Example 2> In Example 2, a display device was obtained in the same manner as in Example 1, except that tracing paper 2 (product name "NT Pile", manufactured by Daio Paper Products Co., Ltd.) was used as a screen instead of tracing paper 1.

[0104] <Example 3> In Example 4, a display device was obtained in the same manner as in Example 1, except that tracing paper 3 (product name "Chromatico A-FS", manufactured by THIBIERGE & COMAR SA) was used as the screen instead of tracing paper 1.

[0105] <Example 4> In Example 4, a display device was obtained in the same manner as in Example 1, except that Japanese paper (product name "Wanshi Tofu", manufactured by Bokuundo Co., Ltd.) was used as a screen instead of the tracing paper 1.

[0106] <Example 5> In Example 5, a display device was obtained in the same manner as in Example 1, except that A3 coated paper (product name "U-Lite L", manufactured by Nippon Paper Industries Co., Ltd.) was used as the screen instead of the tracing paper 1.

[0107] <Example 6> In Example 5, a display device was obtained in the same manner as in Example 1, except that a synthetic resin sheet (product name "Yupo Electrostatic Adsorption (registered trademark) WESC165", manufactured by Yupo Corporation) was used as the screen instead of the tracing paper 1.

[0108] <Example 7> In Example 6, a display device was obtained in the same manner as in Example 1, except that special paper (product name "OK Muse Kaiser", manufactured by Oji F-Tex Co., Ltd.) was used as a screen instead of the tracing paper 1.

[0109] <Example 8> In Example 7, instead of tracing paper 1, A2 coated paper 1 (product name "U-Lite (104.7 g / m2) 2 A display device was obtained in the same manner as in Example 1, except that a "Paperback Screen" (manufactured by Nippon Paper Industries Co., Ltd.) was used as the screen.

[0110] <Comparative Example 1> In Comparative Example 1, instead of tracing paper 1, A2 coated paper 2 (product name "U-Light (127.9 g / m2) 2 A display device was obtained in the same manner as in Example 1, except that a "Paperback Screen" (manufactured by Nippon Paper Industries Co., Ltd.) was used as the screen.

[0111] <Comparative Example 2> In Comparative Example 2, a display device was obtained in the same manner as in Example 1, except that A2 coated paper 3 (product name "Aurora Coat", manufactured by Nippon Paper Industries Co., Ltd.) was used as the screen instead of the tracing paper 1.

[0112] <Opacity measurement> In the display devices according to Examples 1 to 8 and Comparative Examples 1 and 2, the opacity of the screen was measured. Specifically, first, in the portion where the screen and the anti-reflection film do not overlap, the optical density was measured at five points using a transmission densitometer (product name "341C", manufactured by X-Rite, aperture: 2 mm), and the average value of the optical densities at the five points was taken as the optical density OD. Then, the opacity of the anti-reflection film was calculated based on the above formulas (1) to (3), and the opacity of the anti-reflection film was 0.00%. In addition, the opacity of the overlapping portion between each screen and the anti-reflection film was calculated using the same procedure. Here, since the opacity of the anti-reflection film was 0.00% as described above, the opacity of the overlapping portion between the screen and the anti-reflection film can be regarded as the opacity of the screen. Therefore, the opacity of the overlapping portion between the screen and the anti-reflection film was taken as the opacity of the screen.

[0113] <Luminance measurement and luminance decrease rate calculation> In the display devices according to Examples 1 to 8 and Comparative Examples 1 and 2, an image was projected from the projector onto the first surface of the screen, and the luminance of the first surface and the second surface of the overlapping portion of the screen and the anti-reflection film was measured. The measurement was performed in an off-light environment with no external light. The luminance was measured using a luminance meter (product name "2D Colorimeter CA-2500", manufactured by Konica Minolta, Inc.). The luminance meter was placed on the first surface side of the screen at an angle of 15.5 degrees from the linear projection of the projector as shown in FIG. 12. The distance from the screen to the luminance meter was set to 1.651 m, and the distance from the center of the projector to the luminance meter was set to 0.44 m. In this state, a white image with a brightness of 2000 lumens was projected onto the entire surface of the first surface of the screen, and the first surface of the overlapping portion, which is the first surface of the screen, was photographed by the luminance meter. Then, in the captured image, the luminance of a portion consisting of six circles with a diameter of 10 pixels, totaling approximately 471 pixels, was measured at six points, and the average value of the luminance of the six points was calculated to be the luminance of the first surface of the overlapping portion. After that, a luminance meter was placed on the second surface side of the screen at an angle of 15.5 degrees from the linear projection of the projector, and an all-white image with a brightness of 2000 lumens was similarly projected onto the first surface of the screen, and the second surface of the overlapping portion was captured by the luminance meter. Then, in the captured image, the luminance of a portion consisting of approximately 471 pixels, totaling approximately 6 points, was measured, and the average value of the luminance of the six points was calculated to be the luminance of the second surface of the overlapping portion. In addition, when the luminance of the first surface of the overlapping portion is L1 and the luminance of the second surface of the overlapping portion is L2, the luminance reduction rate LR (%) of the luminance L2 of the second surface relative to the luminance L1 of the first surface was calculated by the following formula (4). LR={(L2-L1) / L1}×100...Equation (4)

[0114] <Visibility evaluation> In the exhibition devices according to Examples 1 to 8 and Comparative Examples 1 and 2, an image including the text information shown in Fig. 13 was projected from the projector onto the first surface of the screen, and the visibility on the first surface and the second surface of the screen was evaluated. The evaluation was performed in an environment with an illuminance of 70Lx, and the image used was an image that was located within the first surface and rotated around the Z axis that was perpendicular to the floor surface. The evaluation criteria were as follows: A: The visibility of the image was very good and I was able to understand the text information. B: The image was easily visible and the text information was understandable. C: The image was visible, but the text information was not comprehensible. D: Not only the text but also the image was not visible.

[0115] The results are shown in Table 1 below. [Table 1]

[0116] In the exhibition devices according to Comparative Examples 1 and 2, the visibility of the image was very good on the first surface, but the visibility was insufficient on the second surface. This is thought to be because the opacity of the first surface was too high, so that little of the image reached the second surface. In contrast, in the exhibition devices according to Examples 1 to 8, the visibility of the image was very good or good on the first surface, and also good or very good on the second surface. From these results, it was confirmed that the exhibition devices according to Examples 1 to 8 were capable of displaying images on both the first surface and the second surface. [Explanation of symbols]

[0117] 10…Exhibition equipment 11...Anti-reflective film 11A...Side 1 11B…Second side 12. Screen 12A…Side 1 12B…Second side 13…Projector 14...Support member 15…Exhibits

Claims

1. An exhibition device for exhibiting a video, comprising: a screen having a first surface and a second surface opposite to the first surface, the screen displaying an image; a projector that projects the image onto the screen from a first surface side of the screen, An exhibition device, wherein the screen is constructed from a single screen member and has the function of displaying the image on both the first surface and the second surface.

2. The display device of claim 1 , further comprising an anti-reflective film, the screen being attached to the anti-reflective film.

3. The display device of claim 1 , wherein the opacity of the screen is between 10.0% and 85.0%.

4. 3. The display device of claim 2, wherein the opacity of the screen is between 10.0% and 85.0%.

5. In a darkroom environment, a white image having a brightness of 2000 lumens was projected onto the entire surface of the first surface of the screen, and the luminance of the first surface located on the first surface side of the screen and the luminance of the second surface located on the second surface side of the screen at the overlapping portion between the screen and the anti-reflection film were both 48 cd / m ２ The display device according to claim 2 .

6. 3. The exhibition device of claim 1 or 2, wherein when the normal direction of the first surface of the screen is defined as the X-axis direction, a direction located within the first surface and perpendicular to the X-axis direction is defined as the Y-axis direction, and a direction located within the first surface and perpendicular to the X-axis direction and the Y-axis direction is defined as the Z-axis direction, the projector has the function of projecting an image that rotates around the Z-axis direction as an axis of rotation onto the first surface of the screen.

7. 3. The exhibition device of claim 1 or 2, wherein when the normal direction of the first surface of the screen is defined as the X-axis direction, a direction located within the first surface and perpendicular to the X-axis direction is defined as the Y-axis direction, and a direction located within the first surface and perpendicular to the X-axis direction and the Y-axis direction is defined as the Z-axis direction, the projector has the function of projecting, onto the first surface of the screen, an image that rotates around an axis that is tilted from the Z-axis direction toward the Y-axis direction by more than 0 degrees and not more than 45 degrees.

8. The exhibition device according to claim 1 or 2, wherein the projector has a function of projecting an image in which at least a portion of the image is horizontally inverted onto the first surface of the screen.

9. A method for displaying a video, comprising: a projector is disposed on a side of a screen having a first surface and a second surface opposite to the first surface; projecting an image from the projector onto the first surface of the screen; An exhibition method in which the screen is constructed from a single screen member and has the function of displaying the image on both the first surface and the second surface.

Images