JP5366086B2 - Screen for pasting transparent objects - Google Patents

Description

  The present invention relates to a screen that is attached to a transparent body such as a window glass or an acrylic plate and onto which an image from a projector is projected.

  Conventionally, a combination of a Fresnel lens and a lenticular lens is known as a transmission type projection screen used for a rear projection display. However, such conventional projection screens generally have problems such as a dark screen and a moire pattern due to pitch easily occurring on the screen.

  In the above conventional projection screen, a black stripe is arranged on the focal plane of the lenticular lens, and a part of the outside light is absorbed by the black stripe without attenuating the condensed projector light, thereby reducing the contrast due to the outside light. The technique of suppressing is taken (nonpatent literature 1). However, in practice, a part of the outside light is not absorbed by the black stripes and enters the optical system, so that the reduction in contrast is still a problem.

  In contrast, a new projection screen that does not use a conventional Fresnel lens or lenticular lens has been proposed that uses a light control film. Specifically, it is a projection screen that uses a light control film having an angle dependency on the haze (Patent Documents 1 to 7). In the projection screen, a plurality of light control films are angle-dependent on the haze. The viewing angle can be widened by stacking so that the directions of the light beams intersect at right angles (Patent Documents 22 and 23) or by stacking a plurality of light control films having different haze values depending on the angle (Patent Document 10). ~ 13).

  According to these inventions, it is possible to obtain a projection screen in which diffused and transmitted light exhibits high uniformity over a wide angular range, and by laminating a plurality of the light control films, the brightness and uniformity of the screen are improved. An excellent high viewing angle projection screen can be constructed.

  However, even in the projection screen using the light control film as described above, outside light such as room lighting or sunlight enters from the front side of the screen, and a part of the transmitted light causes back scattering in the light control film. There is a problem. Backscattering means scattering at an angle exceeding 90 ° with respect to the original direction of motion. This backscattered light causes a decrease in contrast, and hinders visual recognition particularly during black display.

  By the way, as a projector screen to be bonded to a window glass or the like, transmission screens (Patent Documents 14 and 15) having a light scattering layer have been developed. These relate to a screen having a certain degree of flexibility. is there.

  On the other hand, a hard screen with no flexibility may be required. However, there is a problem that bubbles are inevitably mixed if a general adhesive is used when a hard screen is stuck on the window glass. Although there is a technique of water sticking to prevent air bubbles from being mixed in, the screen needs to be flexible (flexible) in order to stick the water.

  As a method of bonding hard materials together, a technique using a low-viscosity and transparent visible light curable adhesive is known (Patent Document 16). However, when such a visible light curable adhesive is used, if the size of the screen is large, it is difficult to uniformly apply the adhesive and it cannot be applied on site. Moreover, since it is a permanent adhesion different from an adhesive, it cannot be removed once it has been applied. And since it is adhesive-fixed, when materials with different thermal expansion coefficients are bonded, the window glass may be destroyed due to temperature changes.

Japanese Unexamined Patent Publication No. 63-309902 Japanese Patent Laid-Open No. 64-40905 JP-A 64-77001 Japanese Unexamined Patent Publication No. 2-67501 JP-A-2-54201 Japanese Patent Laid-Open No. 3-107901 Japanese Patent Laid-Open No. 3-107902 JP-A-3-127039 Japanese Patent Laid-Open No. 3-127042 Japanese Patent Laid-Open No. 3-200909 JP-A-4-77728 JP 2005-316354 A JP 2005-31631 A JP 2007-34324 A JP-T-2004-533636 Japanese Patent Laid-Open No. 2001-226641

K.Ebina, “Optical System Architecures for Rear Projection Screen” SID02DIGEST, p1342-1345 (2002)

  The present invention has been made in view of such a situation, and can suppress the backscattering of light incident from the front of the screen, and also prevents bubbles from being mixed when pasted on a window glass or the like. An object of the present invention is to provide a transparent body pasting screen that can be applied on-site while being peeled off.

  In order to achieve the above object, first, the present invention is a screen that is attached to a transparent body and onto which an image from a projector is projected, a light diffusion control layer that controls light diffusion, and a colored adhesive layer. And a UV adhesive layer, and a silicone pressure-sensitive adhesive layer containing a silicone-based pressure-sensitive adhesive adhered to the transparent body.

  According to the above invention (Invention 1), the colored adhesive layer can suppress the backscattering of the light incident from the front of the screen, and at the same time, the black luminance of the projector light can be lowered, thereby improving the contrast. be able to. In addition, the silicone pressure-sensitive adhesive layer can be applied on-site while preventing air bubbles from entering when pasting to a window glass, etc., and can be peeled off without any adhesive residue, preventing damage due to temperature changes. The Further, the ultraviolet absorbing layer provides excellent light resistance.

  In the above invention (Invention 1), the light diffusion control layer is a light control film obtained by irradiating and curing a film of a composition containing at least two kinds of photopolymerizable compounds having a difference in refractive index. (Invention 2).

  Further, the light diffusion control layer is preferably a laminate in which the light control films are laminated in directions in which the light scattering angle regions substantially coincide with each other.

  In the above inventions (Inventions 1 and 2), the color change of the transmitted light by the colored pressure-sensitive adhesive layer is within ± 0.0030 in both hue changes Δx and Δy defined by the CIE 1931 chromaticity diagram, and The luminous transmittance Y of the colored pressure-sensitive adhesive layer is preferably 15 to 90% (Invention 3).

  The colored adhesive layer is preferably colored with a metal complex dye, and the metal complex dye is preferably a chromium complex dye.

  In the said invention (invention 1-3), it is preferable that the said ultraviolet absorption layer reduces the transmittance | permeability of the light of wavelength 380nm to 1.5% or less (invention 4).

  In the said invention (invention 1-4), the said ultraviolet absorption layer reduces the transmittance | permeability of the light of wavelength 380nm to 7.0% or less, and the said colored adhesive layer contains the ultraviolet absorber, It is preferable to reduce the transmittance of light having a wavelength of 380 nm to 5.0% or less (Invention 5).

  The ultraviolet absorbing layer preferably contains a benzophenone compound and / or a benzotriazole compound as an ultraviolet absorber. The colored pressure-sensitive adhesive layer preferably contains a benzophenone compound and / or a benzotriazole compound as an ultraviolet absorber.

  In the said invention (invention 1-5), although it is preferable that the said ultraviolet absorption layer is an adhesive layer containing an ultraviolet absorber (invention 6), the film which has ultraviolet absorption ability may be sufficient.

  In the said invention (invention 1-6), the transparent base material may further interpose between the said ultraviolet absorption layer and the said silicone adhesive layer (invention 7).

  In the said invention (invention 1-7), it is preferable to provide the antireflection layer in the outermost layer by the side of a projector (invention 8).

  In the said invention (invention 1-8), an antireflection layer, the said light-diffusion control layer, the said colored adhesive layer, the said ultraviolet absorber layer, and the said silicone adhesive layer are laminated | stacked in an order from the projector side. (Invention 9) In order from the projector side, the antireflection layer, the light diffusion control layer, the colored adhesive layer, the ultraviolet absorbing layer, the transparent substrate, and the It may be formed by laminating a silicone adhesive layer (Invention 10).

  In the transparent body pasting screen according to the present invention, the colored adhesive layer can suppress the backscattering of the light incident from the front of the screen, and at the same time, the black luminance of the projector light can be lowered. Can be improved. In addition, the silicone pressure-sensitive adhesive layer can be applied on-site while preventing air bubbles from entering when pasting to a window glass, etc., and can be peeled off without any adhesive residue, preventing damage due to temperature changes. The Furthermore, the ultraviolet absorbing layer makes it excellent in light resistance.

It is a figure which shows the layer structure of the screen for transparent body sticking which concerns on one Embodiment of this invention. It is a figure which shows one manufacture example of the light-diffusion control layer in the screen for transparent body sticking concerning the embodiment. It is a figure which shows the layer structure of the screen for transparent body sticking concerning other embodiment of this invention. 6 is a diagram illustrating a backscattering measurement method in Test Example 1. FIG. It is a graph which shows the relationship between the light transmittance of wavelength 380nm of a colored adhesive layer, and the variation | change_quantity (DELTA) Y of luminous transmittance about each ultraviolet absorptive layer from which the light transmittance of wavelength 380nm differs.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a diagram showing a layer configuration of a transparent body pasting screen according to an embodiment of the present invention (a diagram including a projector and a window glass as viewed from above).

  As shown in FIG. 1, the transparent body pasting screen 1 according to this embodiment includes a light diffusion control layer 2 and a color laminated on one side (front side; window glass G side) of the light diffusion control layer 2. An adhesive layer 3, an ultraviolet absorbing layer 4 laminated on the colored adhesive layer 3, a transparent substrate 5 laminated on the ultraviolet absorbing layer 4, a silicone adhesive layer 6 laminated on the transparent substrate 5, A window glass G, which is an example of a transparent substrate, is formed of an antireflection film 7 laminated on the other side (back side; projector P side) of the light diffusion control layer 2 with a silicone adhesive layer 6 interposed therebetween. Affixed to

(Light diffusion control layer)
The light diffusion control layer 2 is a layer that controls the diffusion of light incident from the projector P. In this embodiment, the light diffusion control layer 2 is formed by using a light control film instead of the conventional Fresnel lens or lenticular lens, and preferably the light diffusion layer. It is formed using a light control film laminate in which a control film is laminated. Here, the light diffusion control layer refers to a layer having a function of selectively scattering only incident light from a specific angle range and transmitting incident light at other angles, and the light control film is cloudy. It is a film having an angle dependence on the valence, and refers to a film having a light scattering angle region width of 30 ° or more.

The haze here is a value obtained by measuring the total light transmittance and diffuse transmittance of the light control film using an integrating sphere light transmittance measuring device, and obtaining the following equation.
Haze value (%) = diffuse transmittance (%) / total light transmittance (%) × 100
(Diffuse transmittance = total light transmittance-parallel light transmittance)

  Further, the angle dependency of the haze value in the light control film is measured as follows. That is, the angle θ of the incident light on the test piece of the light control film is changed between 0 to 180 °, the above-described haze value is measured for each angle, and the angle range showing a haze value of 60% or more Is the light scattering angle region. Here, the angle θ is a value in which the direction parallel to the surface of the test piece is 0 ° and the normal direction of the test piece is 90 °, and the rotation of the test piece has a maximum angle dependency of the haze value. In the direction.

  The light control film is suitably formed by forming a composition containing at least two kinds of photopolymerizable compounds having a difference in refractive index into a film shape and irradiating the composition with light from a specific direction. Can be manufactured.

The photopolymerizable compound used for the production of the light control film includes an acryloyl group [CH ₂ ═CHCO—], a methacryloyl group [CH ₂ ═C (CH ₃ ) CO—], a vinyl group [CH ₂ ═ = It is a compound having at least one polymerizable group such as CH—] or allyl group [CH ₂ ═CHCH ₂ —], and various monomers or oligomers can be used.

  Examples of the monomer include tetrahydrofurfuryl acrylate, ethyl carbitol acrylate, dicyclopentenyloxyethyl acrylate, phenyl carbitol acrylate, nonylphenoxyethyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, and ω-hydroxyhexanoyloxyethyl. Acrylate, acryloyloxyethyl succinate, acryloyloxyethyl phthalate, 2,4,6-tribromophenyl acrylate, 2,4,6-tribromophenoxyethyl acrylate, isobornyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, 2 , 2,3,3-tetrafluoropropyl acrylate, phenyl carbitol acrylate, nonylphenoxye And Le acrylates, methacrylates corresponding to these monofunctional acrylates, furthermore, N- vinylpyrrolidone, triallyl isocyanurate, diethylene glycol diallyl carbonate, such as di-arylidene pentaerythritol.

  Examples of the oligomer include polyester acrylate, polyol polyacrylate, modified polyol polyacrylate, isocyanuric acid skeleton polyacrylate, melamine acrylate, hydantoin skeleton polyacrylate, polybutadiene acrylate, epoxy acrylate, and urethane acrylate. And methacrylates corresponding to the functional acrylate.

  These photopolymerizable compounds are used as a composition comprising at least two kinds of mixtures. At this time, one having a difference in refractive index is selected. A region in which light is scattered, that is, a light scattering angle region, is formed by irradiating light from a predetermined direction and curing the composition in which at least two kinds of photopolymerizable compounds having different refractive indexes are mixed. This composition expresses the angle dependency of the haze value due to the mutual solubility of each of a plurality of composing compounds and the respective refractive index differences, and the refractive index difference is large due to a combination with poor compatibility. When the reaction rate is different, the degree of light scattering, that is, the haze value increases. This refractive index difference is preferably 0.01 or more.

  In order to improve curability, this composition is usually mixed with a photopolymerization initiator and subjected to photopolymerization. Examples of the photopolymerization initiator include benzophenone, benzyl, Michler's ketone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, benzoin methyl ether, benzoin ethyl ether, diethoxyacetophenone, benzyldimethyl ketal, and 2-hydroxy-2-methyl. Examples include propiophenone and 1-hydroxycyclohexyl phenyl ketone.

  Such a photocurable composition containing at least two kinds of compounds having a difference in refractive index is applied on a substrate or enclosed in a cell to form a film, and irradiated with light from a rod-shaped light source By gradually curing, a light control film is obtained that scatters incident light in a selective angle region and transmits straight in other angle regions.

  The light used for curing may have any wavelength as long as it cures the composition, and for example, visible light, ultraviolet light, and the like are often used. Ultraviolet rays are emitted from mercury lamps and metal halide lamps. Here, when a rod-shaped lamp is used as the light source, the generated photocured film exhibits anisotropy by adjusting the irradiation conditions (for example, providing a slit or the like at a predetermined position of the irradiation path) When the incident angle of light from the light source is changed, light at a specific angle is scattered. The anisotropy here refers to a film-specific diffusion characteristic when the incident angle of light is changed in the MD (Machine Direction) direction (manufacturing line direction), and the CD (Cross Direction) direction (width). Direction), when the incident angle of light is changed, characteristic diffusion characteristics do not appear (diffuse in all angle ranges). This is because the rod-shaped lamp is arranged perpendicularly to the MD direction and irradiated.

  The degree of scattering and the angle of selectively scattered incident light can be adjusted depending on the composition used and the irradiation conditions, and in particular, by changing the incident angle of the irradiated light on the film-like composition sample surface during curing, When the light incident on the cured sheet exits from the sheet, the angle range with respect to the sheet film surface through which the light is scattered or straightly transmitted can be controlled.

  At the time of photocuring, a light scattering angle region is developed around the light irradiation direction. For example, when light is irradiated almost perpendicularly to the film surface formed from the photocurable composition, a light scattering angle region appears around the vertical direction, that is, the normal direction of the obtained light control film. If light is irradiated from an oblique direction inclined by a predetermined angle with respect to the normal direction, a light scattering angle region is developed around the inclined direction.

  When a plurality of light control films each having a light scattering angle range of 30 ° or more showing a haze value of 60% or more are laminated to form a light control film laminate, the light scattering angle ranges are substantially equal to each other as the light control film. It is preferable to use a plurality of the same.

Here, the light scattering angle regions of the light control film are substantially the same as each other. The light scattering angle region of any one of the light control films as a reference is θ ₁ to θ ₂ (where θ ₁ <θ ₂ ), and when the light scattering angle region of another light control film laminated on this is expressed as θ ₁ ′ to θ ₂ ′ (where θ ₁ ′ <θ ₂ ′), θ ₁ and θ ₁ ′ (| θ ₁ −θ ₁ ′ |) and θ ₂ and θ ₂ ′ (| θ ₂ −θ ₂ ′ |) are the reference light scattering angles of the light control film, respectively. It means that up to about 5% of the width of the region (θ ₂ −θ ₁ ) is allowed.

  When laminating a plurality of light control films whose centers of light scattering angle regions substantially coincide with the normal direction of the light control film, laminate the light scattering angle regions so that the extending directions of the light scattering angle regions are substantially parallel to each other. It is preferable. Further, when a plurality of light control films in which the light scattering angle region is biased with respect to the normal direction of the light control film are stacked, the directions in which the light scattering angle regions extend are substantially parallel to each other, and It is preferable to laminate so that the light scattering angle regions are in the same direction with respect to the normal direction. In this specification, “almost” in terms of “substantially coincide”, “substantially parallel”, etc. means that up to about ± 10 ° is allowed around the arrangement (coincidence or parallel) described therein. To do.

An example of stacking a plurality of light control films will be described with reference to FIG.
First, light control films 22a and 22b having a haze value of 60% or more in the range of angle γ are stacked in a direction in which the width of the light scattering angle region is biased to the right with respect to the normal direction of the light control film. Thus, the first light control film laminate 22 having a haze value of 60% or more in the range of the angle γ ′ in the direction biased to the right with respect to the normal direction is obtained. The angle γ corresponds to the width of the light scattering angle region of the light control films 22a and 22b, and extends in a direction perpendicular to the paper surface. If these two light control films 22a and 22b are laminated in this direction, the angle is the same as the angle γ or slightly wider than the angle γ in the direction biased to the right with respect to the normal direction of the light control film. A first light control film laminate 22 having a haze value of 60% or more in the range of γ ′ is obtained. That is, this angle γ ′ corresponds to the width of the light scattering angle region of the first light control film laminate 22, and extends in a direction perpendicular to the paper surface.

  Second, in the same manner as described above, the light control film 23a exhibits a haze value of 60% or more in the range of the angle γ in the direction in which the width of the light scattering angle region is biased to the left with respect to the normal direction of the light control film. And 23b are laminated to obtain a second light control film laminate 23 having a haze of 60% or more in the range of the angle γ ′ in a direction biased to the left with respect to the normal direction of the light control film. The second light control film stack 23 corresponds to a state in which the direction of the first light control film stack 22 is reversed (a state in which left and right are reversed in this drawing).

  Third, the light control film 21a and 21b exhibiting a haze value of 60% or more in the range of the angle β with the width of the light scattering angle region centered on the normal direction of the light control film, are laminated. A third light control film laminate 21 having a haze of 60% or more in the range of the angle β ′ around the line direction is obtained. The angle β corresponds to the width of the light scattering angle region of the light control films 21a and 21b, and extends in a direction perpendicular to the paper surface. Then, if these two light control films 21a and 21b are laminated in this direction, the light control film is 60 in the range of an angle β ′ that is the same as the angle β or slightly wider than the angle β with the normal direction of the light control film as the center. A third light control film laminate 21 exhibiting a haze value of at least% is obtained. That is, this angle β ′ corresponds to the width of the light scattering angle region of the third light control film laminate 21, and extends in a direction perpendicular to the paper surface.

  Lamination of the light control film may be performed, for example, by cutting the light control film into an appropriate size and pasting them with a single sheet, or by laminating two or more individually produced light control films at the same time. You may carry out by supplying to an apparatus and bonding continuously. In that case, in order to make bonding of light control films | membranes stronger, you may bond using an adhesive, an adhesive agent, etc.

  Alternatively, the light control film can also be laminated by using the light control film itself as a base material and applying and curing the photocurable composition thereon to form another light control film. According to such a method, the above-described laminating operation or apparatus is unnecessary, and the light control film laminate can be produced with good productivity and advantageous in terms of cost. When the light control film itself is used as a base material, first, as described above, as described above, the light curable composition film is irradiated with light to be cured, whereby a predetermined light control serving as the base material is performed. A film is obtained, and then, as a second step, a photocurable composition film having substantially the same composition as that used in the first step is formed on the light control film obtained in the first step. It is formed with substantially the same thickness as in one step, and the composition film has substantially the same conditions as the first step in the irradiation direction, the distance from the light source, the amount of irradiation light, the wavelength of irradiation light, etc. As described above, it is possible to form a further light control film by irradiating and curing light, and further repeat this second step as necessary.

  Since the light control film laminate thus obtained exhibits high uniformity over a wide angle range of diffuse transmitted light, by applying this to the projection screen, a projection screen with excellent screen brightness and uniformity can be obtained. Can do. The light diffusion control layer 2 can be formed from a single layer. However, in order to widen the viewing angle, the light diffusion control layer 2 is formed using a light control film stack obtained by stacking a plurality of light control films. It is desirable to do. In the light diffusion control layer 2 obtained by laminating the light control film laminate, the light control films are usually laminated in 2 to 20 sheets, preferably 4 to 16 sheets, particularly preferably 6 to 12 sheets. The

  When a plurality of light control film stacks are stacked, the light scattering performance and the stacking direction exhibited by each light control film stack are appropriately selected. However, as an advantageous aspect for a projection screen, the light scattering angle region is light. Two light control film laminates that are biased with respect to the normal direction of the control film laminate so that the light scattering angle ranges are opposite to each other about the normal direction of the light control film laminate It is preferable to stack the layers so that the width of the light scattering angle region in the stacked state is wider than that of a single sheet. By doing so, it is possible to widen a good visual recognition area in the left-right or vertical direction, that is, a viewing angle.

  In addition, the light control film layered body in which the center line of the light scattering angle region substantially coincides with the normal direction is arranged so that the center line of the light scattering angle region is substantially parallel to the two light control film layered bodies. It is also effective to stack so as to be. By doing so, a brighter image can be obtained in front of the screen.

  Therefore, the light scattering angle region of the first light control film stack 22 and the second light control film stack 23 in the direction deviated with respect to the normal direction, and the light scattering angle region of each light control angle layer. The film stacks are stacked so that they are opposite to each other about the normal direction of the film stack. This laminate exhibits a haze value of 60% or more in a range of an angle δ wider than the width γ ′ of each light scattering angle region.

  At this time, when the width γ ′ of the light scattering angle region of the first light control film stack 22 and the width γ ′ of the light scattering angle region of the second light control film stack 23 are just in contact with each other, It is advantageous that the light scattering angle region of the light control film laminates 22 and 23 can be utilized to the maximum and the maximum viewing angle expansion effect can be obtained.

  The width γ ′ of the light scattering angle region of the first light control film stack 22 and the width γ ′ of the light scattering angle region of the second light control film stack 23 preferably overlap each other by 5 ° or more. It is advantageous to have a brighter image in front of the screen. On the other hand, if the angle at which the two light scattering angle regions overlap is too large, the effect of widening the viewing angle is sacrificed. Therefore, the extent of the light scattering angle region in the light control film stacks 22 and 23 before being overlaid is reduced. However, it is preferable that a total of 40 ° or more, more preferably 50 ° or more of the regions where the light scattering angle regions do not overlap when two sheets are stacked.

  Further, the width γ ′ of the light scattering angle region of the first light control film stack 22 and the width γ ′ of the light scattering angle region of the second light control film stack 23 are symmetric with respect to the normal direction. This is advantageous because the visual characteristics are the same on the right and left sides or on the upper and lower sides of the screen.

  Finally, the third light control film laminate 21 is further divided into the center lines of the widths γ ′ and β ′ of the light scattering angle region with respect to the laminate of the two light control film laminates 22 and 23. Are laminated in parallel to each other (normal direction of each light control film laminate). Thereby, a brighter image can be obtained in front of the screen.

  In FIG. 2, the case where the third light control film stack 21 is stacked on the first light control film stack 22 and the second light control film stack 23 has been described as an example. For example, the third light control film stack 21 may be stacked below the first light control film stack 22 and the second light control film stack 23, A third light control film stack 21 may be inserted between one light control film stack 22 and the second light control film stack 23. Moreover, although FIG. 2 demonstrated on the assumption that the two light control film laminated bodies 22 and 23 were the same kind, you may use a thing of a different kind.

  Furthermore, in FIG. 2, the case where three light control film stacks are stacked has been described as an example, but four or more may be stacked. For example, when four or more light control film stacks are stacked in a state where three light control film stacks 21, 22, and 23 are stacked as shown in FIG. The four or more light control film laminates may be laminated so that the light scattering angle regions are substantially the same. For example, you may laminate | stack so that the light-scattering angle area of the light control film laminated body 21,22,23 may become substantially the same. Or you may further laminate | stack two sheets from which the light-scattering angle area was unevenly distributed from the normal line direction of the laminated body opposite to each other like the laminated | stacked light control film laminated bodies 22 and 23. FIG. In this case, the stacking order can be arbitrarily selected. The fourth or later light control film laminate also has a light scattering angle range of 30 ° showing a haze value of 60% or more, like the three light control film laminates 21, 22, and 23 described above. In particular, it is more preferably 40 ° or more, and further preferably 45 ° or more. In addition, although the width | variety of the light-scattering angle area of a light control film laminated body is so preferable that it is wide, it is usually 170 degrees or less.

  The light control film laminate may be used as a flat plate in which a plurality of light control films are laminated, or the outermost layer may have a lenticular lens shape. As a method for forming a lens curved surface, there is a method for forming a light control film having a lens curved surface in addition to a method for laminating a light control film laminate on a film having a lens curved surface. When the latter method is employed, for example, a mold having a lens curved surface is used, and a photocurable resin composition is applied thereto and further irradiated with light to give the cured product a lens curved surface.

  In addition, the light diffusion control layer 2 in the present embodiment is desired to be as thin as possible from the viewpoint of reducing the thickness of the screen. However, a certain degree of film thickness is required in order to exhibit sufficient light scattering characteristics. That is, the film thickness of the light diffusion control layer 2 is preferably 50 to 3000 μm, and more preferably 150 to 2000 μm. By setting the film thickness within this range, the light diffusion angle and the distribution characteristics of the light diffusion light with respect to the wavelength can be made uniform.

  In order to make the light diffusion control layer 2 have the above film thickness, the thickness of the light control film itself is usually 5 to 300 μm, preferably 15 to 250 μm, and particularly preferably 50 to 200 μm. In addition, about uniforming the distribution characteristic of light diffused light, it may be performed by thickness control by the number of laminated light control films as described above, or by film thickness control per layer.

(Colored adhesive layer)
In the transparent body pasting screen 1 according to this embodiment, the colored adhesive layer 3 laminated on the light diffusion control layer 2 suppresses backscattering of light (external light) incident from the front of the screen in the light diffusion control layer 2. At the same time, the black luminance of the projector light can be lowered, so that the contrast can be improved. In a screen using a Fresnel lens and a lenticular lens, a black matrix is generally provided on the lenticular lens, but the colored adhesive layer 3 can be considered to have an effect instead of this.

  Regarding suppression of backscattering of external light, for example, when a colored pressure-sensitive adhesive layer 3 having a transmittance of 40% is provided and the transmitted light is considered to be 100% backscattered at the interface of the light diffusion control layer 2, the light is colored twice. Since the adhesive layer 3 is passed, backscattering can be suppressed to 100% × 0.4 × 0.4 = 16%.

  In the invention described in Japanese Patent Application Laid-Open No. 2005-274955, preventing the entry of external light into the optical system by reducing the transmittance using a dye causes a reduction in the utilization efficiency of the projector light. Deny, use a polarizer. However, it is very difficult to match the polarization of the projector light and the transmission axis of the polarizer to be arranged, and unless they match, the projector light will be absorbed according to the transmittance of the polarizer. In this respect, the same can be said even if the transmittance is lowered by using a dye. Rather than using a polarizer, the provision of the colored pressure-sensitive adhesive layer 3 as in the present embodiment not only suppresses backscattering of external light, but also improves the contrast, thereby increasing visibility. In addition, the polarizer has a problem of warpage and is expensive, and the configuration as a screen is complicated. However, if the colored pressure-sensitive adhesive layer 3 is used, there is no problem of warpage and it is inexpensive. It can be manufactured and the configuration can be simplified.

  The colored pressure-sensitive adhesive layer 3 is composed of a colored pressure-sensitive adhesive (colored pressure-sensitive adhesive), and the colored pressure-sensitive adhesive contains a pressure-sensitive adhesive resin as a main component and a colorant.

  Examples of the adhesive resin include acrylic, rubber, and silicone adhesive resins, among which acrylic copolymers are preferable. Examples of the acrylic copolymer include (meth) acrylic acid ester copolymers. In this specification, (meth) acrylic acid ester means both acrylic acid ester and methacrylic acid ester. The same applies to other similar terms.

  As the (meth) acrylic acid ester copolymer, those having a crosslinking point that can be crosslinked by various crosslinking methods are preferably used. There is no particular limitation on the (meth) acrylic acid ester-based copolymer having such a crosslinking point, and any (meth) acrylic acid ester-based copolymer conventionally used as a resin component of an adhesive can be arbitrarily selected. Can be selected and used.

  As a (meth) acrylic acid ester-based copolymer having such a crosslinking point, a (meth) acrylic acid ester having an alkyl group of 1 to 20 carbon atoms and a crosslinkable functional group in the molecule. Preferable examples include copolymers of monomers and other monomers used as desired.

  Here, examples of the (meth) acrylic acid ester having 1 to 20 carbon atoms of the alkyl group in the ester portion include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, (meth ) Butyl acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, decyl (meth) acrylate, ( Examples include dodecyl (meth) acrylate, myristyl (meth) acrylate, palmityl (meth) acrylate, stearyl (meth) acrylate, and the like. These may be used alone or in combination of two or more.

  The monomer having a crosslinkable functional group in the molecule preferably contains at least one selected from the group consisting of a hydroxyl group, a carboxyl group, and an amino group as a functional group. As a specific example, (meth) acrylic acid 2-hydroxyethyl, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, (meth) acrylic acid (Meth) acrylic acid hydroxyalkyl esters such as 4-hydroxybutyl; (meth) acrylic acid monomethylaminoethyl, (meth) acrylic acid monoethylaminoethyl, (meth) acrylic acid monomethylaminopropyl, (meth) acrylic acid monoethyl Monoalkylamino (meth) acrylates such as aminopropyl Steal; (Meth) acrylic acid dimethylaminoethyl, (meth) acrylic acid diethylaminoethyl and other (meth) acrylic acid dialkylamino esters; acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, citraconic acid and other ethylenic acids And unsaturated carboxylic acid. These monomers may be used independently and may be used in combination of 2 or more type.

  Examples of other monomers include acrylamides such as (meth) acrylamide, N-methyl (meth) acrylamide, and N-methylol (meth) acrylamide; vinyl esters such as vinyl acetate and vinyl propionate; ethylene, propylene Olefins such as styrene, isobutylene; halogenated olefins such as vinyl chloride and vinylidene chloride; styrene monomers such as styrene and α-methylstyrene; diene monomers such as butadiene, isoprene and chloroprene; acrylonitrile and methacrylo Examples thereof include nitrile monomers such as nitrile. These may be used alone or in combination of two or more.

  The (meth) acrylic acid ester copolymer is not particularly limited as to its copolymerization form, and may be any of a random copolymer, a block copolymer, or a graft copolymer. As the molecular weight, those having a weight average molecular weight of 500,000 or more are usually used. When the weight average molecular weight is 500,000 or more, adhesion and adhesion durability are sufficient, and neither lifting nor peeling occurs. In view of adhesion and adhesion durability, the weight average molecular weight is preferably 600,000 to 2,200,000, particularly preferably 700,000 to 2,000,000. In addition, the weight average molecular weight in this specification is the value of polystyrene conversion measured by the gel permeation chromatography (GPC) method.

  The colorant contained in the colored pressure-sensitive adhesive layer 3 is preferably such that light transmitted through the colored pressure-sensitive adhesive layer 3 does not cause a change in color tone. The degree of allowable color change is such that it is difficult for the human eye to recognize the change in hue. Specifically, the color change of transmitted light by the colored adhesive layer 3 is determined by the International Lighting Commission. The hue changes Δx and Δy defined by the standard CIE1931 chromaticity diagram are both preferably within ± 0.0030, and more preferably within ± 0.0020. If the hue change is within such a range, it is difficult for the human eye to recognize the hue change.

  On the other hand, the luminous transmittance Y of the colored pressure-sensitive adhesive layer 3 is usually preferably 90% or less, more preferably 75% or less, and particularly preferably 65 in order to effectively suppress the backscattering of external light. % Or less. If the luminous transmittance Y is low, it is necessary to increase the intensity of the projector light. If the luminous transmittance Y of the colored adhesive layer 3 is too low, a clear image can be obtained even if the intensity of the projector light is increased. There is a risk that it will not be obtained. From such a viewpoint, the luminous transmittance Y of the colored pressure-sensitive adhesive layer 3 is preferably 15% or more, more preferably 20% or more, and particularly preferably 45% or more. The luminous transmittance Y is a value calculated from the CIE 1931 chromaticity diagram.

  In order to suppress color tone change, the colorants can be used in appropriate combinations, and it is preferable to create a neutral gray color by the combination. However, if the color of the other layers 2, 4, 5, 6, and 7 of the transparent body pasting screen 1 is lost, the color tone is corrected by appropriately selecting the colorant of the colored adhesive layer 3. You can also.

  As the colorant, known ones such as inorganic pigments, organic pigments and organic dyes can be used.

  Examples of inorganic pigments include carbon black, cobalt dyes, iron dyes, chromium dyes, titanium dyes, vanadium dyes, zirconium dyes, molybdenum dyes, ruthenium dyes, platinum dyes, ITO (indium) Tin oxide) dyes, ATO (antimony tin oxide) dyes, and the like.

  Examples of organic pigments and organic dyes include aminium dyes, cyanine dyes, merocyanine dyes, croconium dyes, squalium dyes, azurenium dyes, polymethine dyes, naphthoquinone dyes, pyrylium dyes, and phthalocyanine dyes. , Naphthalocyanine dyes, naphtholactam dyes, azo dyes, condensed azo dyes, indigo dyes, perinone dyes, perylene dyes, dioxazine dyes, quinacridone dyes, isoindolinone dyes, quinophthalone dyes, pyrrole Dyes, thioindigo dyes, metal complex dyes (metal complex dyes), dithiol metal complex dyes, indolephenol dyes, triallylmethane dyes, anthraquinone dyes, dioxazine dyes, naphthol dyes, azomethine dyes, Ben Imidazolone dyes, pyranthrone pigments and threne color like. These pigments or dyes can be appropriately mixed and used in order to adjust the target hue.

  Some colorants may react with the functional groups of the adhesive resin, crosslinking agents, etc. to cause gelation of the adhesive or increase in the haze value of the adhesive layer. . Among the above colorants, metal complex dyes, particularly chromium complex dyes are preferred because they are less susceptible to the influence of the functional group of the adhesive resin and are less likely to deteriorate, so that a highly durable colored adhesive layer 3 can be obtained. Among the above colorants, carbon black has the effect of imparting very high weather resistance when added alone. However, from the viewpoint of dispersibility with respect to the adhesive resin, a dye is preferable to a pigment.

  The lower limit of the content of the colorant in the colored pressure-sensitive adhesive is not particularly limited as long as the desired effect is obtained, but is usually about 0.01% by mass. On the other hand, the upper limit of the content of the colorant in the colored adhesive is preferably 15% by mass or less, thereby ensuring the durability of the colored adhesive layer 3. From such a viewpoint, the content of the colorant in the colored pressure-sensitive adhesive is preferably 0.01 to 15% by mass, particularly preferably 0.1 to 12% by mass, and 0.3 to 10%. More preferably, it is mass%.

  If desired, the colored pressure-sensitive adhesive constituting the colored pressure-sensitive adhesive layer 3 can contain a crosslinking agent. There is no restriction | limiting in particular as this crosslinking agent, Arbitrary things can be suitably selected and used from what was conventionally used as a crosslinking agent in an acrylic adhesive. Examples of such crosslinking agents include polyisocyanate compounds, epoxy resins, melamine resins, urea resins, dialdehydes, methylol polymers, aziridine compounds, metal chelate compounds, metal alkoxides, and metal salts. Isocyanate compounds are preferably used.

  Examples of the polyisocyanate compound include aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, alicyclic polyisocyanates such as isophorone diisocyanate, and hydrogenated diphenylmethane diisocyanate. , And their biuret bodies, isocyanurate bodies, and adduct bodies that are a reaction product with low molecular active hydrogen-containing compounds such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylol propane, castor oil, etc. it can. These crosslinking agents may be used individually by 1 type, and may be used in combination of 2 or more type.

  Although the compounding quantity of a crosslinking agent is based also on the kind of crosslinking agent, it is 0.01-20 mass parts normally with respect to 100 mass parts of adhesive resin (acrylic copolymer), Preferably, 0.1-10 mass Part.

  For the colored adhesive, various additives usually used for acrylic adhesives, for example, a tackifier and an antioxidant, as long as the purpose of the transparent body pasting screen 1 according to this embodiment is not impaired. UV absorbers, light stabilizers, softeners, and the like can be added. The case where an ultraviolet absorber is added to the colored adhesive will be described later.

  The thickness of the colored pressure-sensitive adhesive layer 3 is preferably 10 to 50 μm, and particularly preferably 15 to 35 μm. If the thickness of the colored pressure-sensitive adhesive layer 3 is less than 10 μm, it becomes difficult to impart durability performance or control the transmittance. On the other hand, if the thickness of the colored pressure-sensitive adhesive layer 3 exceeds 50 μm, manufacturing problems and diffusion characteristics are difficult. May be caused, and it is economically undesirable.

[UV absorbing layer]
The ultraviolet absorbing layer 4 suppresses the deterioration of the pigment in the colored adhesive in the colored adhesive layer 3 due to external light and the performance deterioration of the transparent body pasting screen 1 according to this embodiment. The ultraviolet absorbing layer 4 only needs to be provided on the screen front side (side closer to the window glass or the like as the adherend) than the colored pressure-sensitive adhesive layer 3, and may be a pressure-sensitive adhesive layer or a transparent substrate. In this embodiment, an adhesive layer containing an ultraviolet absorber (ultraviolet absorbing adhesive layer) will be described as an example.

  The ultraviolet absorbing layer 4 (ultraviolet absorbing adhesive layer) in the present embodiment is composed of an adhesive (ultraviolet absorbing adhesive) containing an ultraviolet absorber, and the ultraviolet absorbing adhesive includes an adhesive resin as a main component, Contains a UV absorber.

  Examples of the adhesive resin include acrylic, rubber-based, and silicone-based adhesive resins, among which an acrylic copolymer is preferable, and the acrylic copolymer described for the colored adhesive layer 3 and Similar ones can be used.

  Examples of the ultraviolet absorber include compounds such as benzophenone, benzotriazole, benzoate, benzoxazinone, triazine, phenyl salicylate, cyanoacrylate, nickel complex, and the like. It may also be used in combination of two or more.

  Among the ultraviolet absorbers, it is preferable to use a benzophenone compound and / or a benzotriazole compound. These ultraviolet absorbers have good compatibility with adhesive resins, particularly acrylic copolymers, have few problems such as precipitation from the adhesive, and are excellent in durability in the adhesive.

  The content of the ultraviolet absorbent in the ultraviolet absorbent adhesive can also control the ultraviolet absorption performance by changing the thickness of the adhesive, and thus adjustment including the thickness is usually required. It is preferable that it is mass%, and it is especially preferable that it is 1.2-3 mass%. If the content of the ultraviolet absorber is less than 1% by mass, the ultraviolet absorption effect is low and the deterioration suppressing effect is difficult to obtain. On the other hand, if the content of the UV absorber exceeds 15% by mass, it is not only economically wasteful, but also the compatibility is lowered by increasing the concentration in the pressure-sensitive adhesive, and precipitation occurs due to the influence of temperature change and the like. May occur.

  When the other layers in the transparent body pasting screen 1 have substantially no ultraviolet absorption effect, the ultraviolet absorption layer 4 preferably reduces the transmittance of light having a wavelength of 380 nm to 1.5% or less. It is preferable to reduce it to 0.0% or less.

  When the other layer in the transparent body pasting screen 1, for example, the colored pressure-sensitive adhesive layer 3 contains an ultraviolet absorber and the transmittance of light having a wavelength of 380 nm is reduced to 5.0% or less, the ultraviolet absorbing layer 4 preferably reduces the transmittance of light having a wavelength of 380 nm to 7.0% or less. Even when the colored pressure-sensitive adhesive layer 3 contains an ultraviolet absorber, the ultraviolet absorbers listed above can be used as the ultraviolet absorber, and among them, a benzophenone compound and / or a benzotriazole compound are used. It is preferable. The other layer may be the transparent substrate 5 or the silicone pressure-sensitive adhesive layer 6.

  By reducing the transmittance of light having a wavelength of 380 nm as described above, the pigment deterioration of the colored adhesive in the colored adhesive layer 3 due to external light and the performance deterioration of the transparent body pasting screen 1 according to the present embodiment. It can be effectively suppressed.

  The thickness of the ultraviolet absorbing layer 4 can be controlled by changing the content of the ultraviolet absorber, so that the adjustment including the content of the ultraviolet absorber is necessary, but usually 10 to 50 μm. It is preferable that it is especially 15-35 micrometers. If the thickness of the ultraviolet absorbing layer 4 is less than 10 μm, the above-mentioned effect due to the ultraviolet absorbing layer 4 is difficult to be obtained. On the other hand, if the thickness of the ultraviolet absorbing layer 4 exceeds 50 μm, it is economically wasteful and transparent. The weight of the body sticking screen 1 is increased, which is not preferable in the production process.

(Transparent substrate)
The transparent substrate 5 in this embodiment functions as a substrate for a double-sided tape having an ultraviolet absorbing layer 4 (ultraviolet absorbing adhesive layer) on one side and a silicone adhesive layer 6 on the other side. It is.

  The transparent substrate 5 is not particularly limited as long as it is a transparent substrate that can support the ultraviolet absorbing layer 4 (ultraviolet absorbing adhesive layer) and the silicone adhesive layer 6, and a plastic film is usually used.

  Examples of the plastic film include polyester films such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, polyolefin films such as polyethylene film and polypropylene film, cellophane, diacetyl cellulose film, triacetyl cellulose film, acetyl cellulose butyrate film, poly Vinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polystyrene film, polycarbonate film, polymethylpentene film, polysulfone film, polyether ether ketone film, polyether sulfone film, polyether Imide film, fluororesin film, Amide film, acrylic resin film, polyurethane resin film, a norbornene-based polymer films, cycloolefin polymer films, cyclic conjugated diene polymer film, vinyl alicyclic hydrocarbon polymer film.

  In the above-mentioned plastic film, for the purpose of improving the adhesion with the layer provided on the surface (ultraviolet absorption layer 4, silicone pressure-sensitive adhesive layer 6), primer treatment, oxidation method, roughening method on one or both sides as desired. Surface treatment can be performed by such as. Examples of the oxidation method include corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone / ultraviolet treatment, and examples of the unevenness method include a sand blast method and a solvent treatment method.

  The thickness of the transparent substrate 5 is usually about 10 to 200 μm, preferably about 20 to 100 μm.

  In addition, although the transparent body sticking screen 1 according to the present embodiment includes the transparent base material 5, the transparent base material 5 may be omitted without being limited thereto.

[Silicone adhesive layer]
The silicone pressure-sensitive adhesive layer 6 is for sticking the transparent body sticking screen 1 to a transparent body (window glass G in FIG. 1), and is a pressure-sensitive adhesive layer containing a silicone-based pressure-sensitive adhesive (silicone pressure-sensitive adhesive). is there.

  In the case of the silicone pressure-sensitive adhesive layer 6, due to its self-adhesive property, it sticks to the adherend while extruding air, so there is no optical defect due to mixing of bubbles. This is an effect obtained even when the transparent body pasting screen 1 is hard. That is, the transparent body pasting screen 1 can be applied on-site by the silicone adhesive layer 6 while preventing air bubbles from entering. In addition, the silicone pressure-sensitive adhesive layer 6 can be re-peeled without adhesive residue, while being adhered to the adherend and very firmly attached. Furthermore, since the silicone pressure-sensitive adhesive layer 6 is excellent in flexibility, even if the thermal expansion coefficients of the transparent body pasting screen 1 and the transparent body to be adhered are different, the silicone pressure-sensitive adhesive layer 6 relaxes the stress, It can prevent that adherends, such as a window glass, destroy by a temperature change. In addition, the silicone pressure-sensitive adhesive layer 6 is a pressure-sensitive adhesive layer used in a portion closest to an adherend such as a window glass, that is, a portion closest to outside light. It is also excellent in properties.

  As a silicone type adhesive, what contains organopolysiloxane and / or its derivative as a main component can be used, for example. In particular, it is preferable to use, as a main component, silicone rubber containing an addition type organopolysiloxane composed of an organopolysiloxane having an alkenyl group having a siloxane bond as a main skeleton and an organohydrogenpolysiloxane, and a platinum catalyst as constituent components.

The organopolysiloxane having a siloxane bond as the main skeleton and an alkenyl group is specifically a compound represented by the following average unit formula (1) and having at least two alkenyl groups in the molecule: It is.
R ¹ _a SiO _{(4-a) / 2} (1)
Wherein R ¹ is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms, which are the same or different from each other, and a is 1.5 to 2.8, preferably 1 .8 to 2.5, more preferably a positive number in the range of 1.95 to 2.05.)

Examples of the unsubstituted or substituted monovalent hydrocarbon group bonded to the silicon atom represented by R ¹ include a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a butenyl group, a hexenyl group, a cyclohexenyl group, and an octenyl group. Such as alkenyl group, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, hexyl group, cyclohexyl group, octyl group, nonyl group, decyl group, etc. Aralkyl groups such as alkyl groups, phenyl groups, tolyl groups, xylyl groups and naphthyl groups, aralkyl groups such as benzyl groups, phenylethyl groups and phenylpropyl groups, and some or all of the hydrogen atoms of these groups may be fluorine, bromine Substituted with a halogen atom such as chlorine, cyano group, etc., such as chloromethyl group, chloropropylene Group, bromoethyl group, trifluoropropyl group, cyanoethyl group and the like.

  As the alkenyl group, a vinyl group is preferable from the viewpoint of productivity because the curing time is short. The organohydrogenpolysiloxane has a SiH group in the molecule, and undergoes an addition reaction with the alkenyl group of the organopolysiloxane having a siloxane bond as a main skeleton and an alkenyl group, whereby the silicone rubber is cured.

  Examples of the platinum catalyst include platinum black, secondary platinum chloride, chloroplatinic acid, a reaction product of chloroplatinic acid and a monohydric alcohol, a complex of chloroplatinic acid and olefins, platinum bisacetoacetate, and the like. .

  The platinum catalyst is preferably used in the range of 0.01 to 3.0 parts by mass, particularly in the range of 0.05 to 2.0 parts by mass with respect to 100 parts by mass of the addition type organopolysiloxane. It is preferable. If the amount of platinum catalyst used relative to 100 parts by mass of the addition type organopolysiloxane is less than 0.01 parts by mass, the removability may be inferior due to insufficient curing, and the amount of platinum catalyst used exceeds 3.0 parts by mass. In such a case, the sticking property is deteriorated, the gelation by the addition reaction is fast, and the coating may be difficult.

  In addition type organopolysiloxane, various silicone resins used in silicone-based pressure-sensitive adhesives, that is, trifunctional or tetrafunctional in the molecule, in order to increase the adhesive strength within the range not impairing the object of the present invention. Polyorganosiloxanes containing siloxane units can be included. The content thereof is preferably 50 parts by mass or less, particularly preferably in the range of 5 to 20 parts by mass with respect to 100 parts by mass of the addition type organopolysiloxane. When the content of the silicone resin exceeds 50% by mass, the adhesive strength increases and re-peeling may be difficult.

  The thickness of the silicone pressure-sensitive adhesive layer 6 is preferably 5 to 100 μm, more preferably 15 to 50 μm, and particularly preferably 30 to 50 μm. If the thickness of the silicone pressure-sensitive adhesive layer 6 is less than 5 μm, it is difficult to obtain a desired pressure-sensitive adhesive force or holding force. On the other hand, if the thickness of the silicone pressure-sensitive adhesive layer 6 exceeds 100 μm, a very long curing time is required. However, it is economically wasteful and may have an adverse optical effect.

[Antireflection film]
As the antireflection film 7, a film having a reflection control layer can be used. Specifically, it is preferable to use a plastic film coated with an antireflection layer (AR) or a low reflection layer (LR), and conventionally known ones can be used. The antireflection film 7 does not have a function of selectively scattering only incident light from a specific angle range and transmitting incident light at other angles, and the light diffusion control layer 2 described above. Are different.

  Examples of the plastic film used for the antireflection film 7 include polyester films such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, polyolefin films such as polyethylene film and polypropylene film, cellophane, diacetylcellulose film, triacetylcellulose film, and acetyl. Cellulose butyrate film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polystyrene film, polycarbonate film, polymethylpentene film, polysulfone film, polyether ether ketone film, poly Ether sulfone film, polyetherimide film Fluorine resin film, polyamide film, acrylic resin film, polyurethane resin film, norbornene polymer film, cyclic olefin polymer film, cyclic conjugated diene polymer film, vinyl alicyclic hydrocarbon polymer film, etc. .

  The antireflection layer or the low reflection layer may be formed by coating a conventionally known material on the plastic film as the substrate.

  The thickness of the antireflection film 7 is usually about 10 to 200 μm, preferably about 20 to 100 μm.

  In addition, although the screen 1 for transparent body sticking which concerns on this embodiment is provided with the antireflection film 7, it is not limited to this, The antireflection film 7 may be abbreviate | omitted.

  In the transparent body pasting screen 1 according to this embodiment, a transparent substrate layer may be provided between or adjacent to any of the layers for the purpose of imparting a certain degree of rigidity to the screen. As the transparent substrate, a plastic plate or a glass plate is usually used.

  As a material of the plastic plate, for example, a material having excellent transparency and dimensional stability such as polycarbonate, polyarylate, polyether sulfone, amorphous polyolefin, polyethylene terephthalate, polymethyl methacrylate, and the like is used. In consideration of prevention of outgas generation such as moisture from the plastic plate in a high temperature environment, a plastic plate having hard coat layers laminated on both sides can be preferably used. When the hard coat layer has an antireflection function, it can be disposed on the projector projection side of the transparent body pasting screen 1 and used as an alternative to the antireflection film.

  The thickness of the plastic plate is usually about 0.5 to 10 mm, preferably about 2 to 8 mm. If it is 0.5 mm or more, rigidity when used as a screen can be imparted, and if it is 10 mm or less, it can be used without any problem in the production process.

  On the other hand, since the specific gravity is high, the thickness of a glass plate is about 0.5-5.0 mm normally, Preferably it is about 1.0-3.0 mm. If it is 0.5 mm or more, rigidity when used as a screen can be imparted, and if it is 5.0 mm or less, it can be used without any problem in the production process.

〔Production method〕
The transparent body pasting screen 1 according to the present embodiment can be manufactured as follows using the various materials described above. In addition, the following manufacturing methods are examples and are not limited thereto.

  First, as shown in FIG. 2, two light control films having the same light scattering angle region are stacked so that the light scattering angle regions coincide with each other, and light control film stacks 21, 22 and 23 are obtained.

  Next, the light control film laminate 23 is laminated on the surface of the antireflection film 7 where the antireflection layer is not provided. Further, the light control film laminate 22 is laminated so that the light scattering angle region of the light control film laminate 23 and the normal direction of the light control film laminate 23 are symmetric. Thereafter, the light control film laminate 21 is laminated on the antireflection film 7 so as to coincide with the center line (normal direction) of the light scattering angle region of the laminated light control film laminates 23 and 22. The light diffusion control layer 2 is formed.

  The adhesive between the antireflection film 7 and the light control film laminate 23 or between the light control film laminates 21, 22, and 23 may be replaced with an adhesive or an adhesive. Moreover, you may use together with a laminate.

  Here, the colored adhesive layer 3 is formed on the release film by applying and drying the above-mentioned colored adhesive on the release layer of the release film. The exposed surface side of the obtained colored pressure-sensitive adhesive layer 3 and the light diffusion control layer 2 side of the “antireflection film 7 / light diffusion control layer 2” structure obtained by the above-mentioned steps are bonded together, and “antireflection” A structure of “film 7 / light diffusion control layer 2 / colored adhesive layer 3” is obtained.

  On the other hand, the silicone pressure-sensitive adhesive layer 6 is formed by applying and drying a silicone pressure-sensitive adhesive on one surface of the transparent substrate 5. The obtained silicone pressure-sensitive adhesive layer 6 is protected by a process sheet, the surface is turned over, and the composition (ultraviolet-absorbing pressure-sensitive adhesive) constituting the above-described ultraviolet absorbing layer is applied to the other surface of the transparent substrate 5 and dried. Thus, the ultraviolet absorbing layer 4 is formed. As a result, a structure of “UV absorbing layer 4 / transparent substrate 5 / silicone pressure-sensitive adhesive layer 6” is obtained.

  Next, the “antireflection film 7 / light diffusion control layer 2 / colored pressure-sensitive adhesive layer 3” and “ultraviolet absorption layer 4 / transparent substrate 5 / silicone pressure-sensitive adhesive layer 6” obtained in the above steps Were bonded so that the colored pressure-sensitive adhesive layer 3 and the ultraviolet absorbing layer 4 were in contact with each other, and “antireflection film 7 / light diffusion control layer 2 / colored pressure-sensitive adhesive layer 3 / ultraviolet absorbing layer 4 / transparent substrate 5 / silicone”. A transparent body pasting screen 1 comprising the pressure-sensitive adhesive layer 6 ”is obtained.

  The obtained transparent body pasting screen 1 is preferably subjected to pressure treatment such as autoclave treatment in order to improve the bonding strength between the respective layers. For example, the autoclave treatment is preferably performed at a temperature of 50 to 70 ° C. and a pressure of 0.5 to 2.0 MPa for about 10 to 100 minutes. Instead of the autoclave process, other various pressure processes such as a pressure bonding process using a pressure roller may be performed.

  Here, for the application of the various adhesives for forming the various adhesive layers described above, a known coating method can be used, for example, bar coating method, knife coating method, roll coating method, blade coating. A method in which a pressure-sensitive adhesive is coated to form a coating film using a method, a die coating method, a gravure coating method, or the like, and is dried can be used. The drying conditions are not particularly limited, but are usually about 10 seconds to 10 minutes at 50 to 150 ° C. Moreover, when coating an adhesive, a solvent can be used. It does not specifically limit as a solvent, For example, toluene, ethyl acetate, methyl ethyl ketone, etc. are mentioned preferably.

  In the transparent sticking screen 1 described above, the colored adhesive layer 3 can suppress the backscattering of light incident from the front of the screen, and at the same time, the black luminance of the projector light can be reduced. Can be improved. In addition, the silicone adhesive layer 6 can be applied on-site while preventing air bubbles from entering when pasting to a window glass or the like, and can be peeled off without any adhesive residue, and also prevents damage due to temperature changes. The Furthermore, the ultraviolet absorbing layer 4 provides excellent light resistance.

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, the ultraviolet absorbing layer 4 may be a film having an ultraviolet absorbing ability, and the transparent substrate 5 may be omitted accordingly. Such a transparent body pasting screen 1A is shown in FIG.

  As shown in FIG. 3, the transparent body pasting screen 1 </ b> A includes a light diffusion control layer 2, a colored adhesive layer 3 laminated on one side (front side; window glass G side) of the light diffusion control layer 2, and The UV absorbing layer 4A laminated on the colored adhesive layer 3, the silicone adhesive layer 6 laminated on the UV absorbing layer 4A, and the other side (back side; projector P side) of the light diffusion control layer 2 are laminated. The antireflection film 7 is attached to a window glass G which is an example of a transparent substrate via a silicone adhesive layer 6.

  The ultraviolet absorbing layer 4A is a film having an ultraviolet absorbing ability, and may be a film made of a resin having an ultraviolet absorbing ability or a plastic film containing an ultraviolet absorbent.

  Examples of the film made of a resin having an ultraviolet absorbing ability include a triacetyl cellulose film. On the other hand, the plastic film containing the UV absorber is not particularly limited as long as it has UV absorbing performance by kneading the UV absorber into the film or coating the UV absorber on the film surface. Can be used for Examples of such plastic films include polyester films such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, polyolefin films such as polyethylene film and polypropylene film, cellophane, diacetyl cellulose film, triacetyl cellulose film, acetyl cellulose butyrate film, Polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polystyrene film, polycarbonate film, polymethylpentene film, polysulfone film, polyether ether ketone film, polyether sulfone film, poly Etherimide film, fluororesin film , A polyamide film, an acrylic resin film, polyurethane resin film, a norbornene-based polymer films, cycloolefin polymer films, cyclic conjugated diene polymer film, vinyl alicyclic hydrocarbon polymer film.

  As the UV absorber, the same UV absorber as described for the UV absorber layer 4 can be used, and the content of the UV absorber is the same as that of the UV absorber layer 4.

  The thickness of the ultraviolet absorbing layer 4A is preferably 40 to 200 μm, and particularly preferably 80 to 100 μm. If the thickness of the ultraviolet absorbing layer 4A is less than 40 μm, it is difficult to obtain the above effect by the ultraviolet absorbing layer 4A. On the other hand, if the thickness of the ultraviolet absorbing layer 4A exceeds 200 μm, the optical performance is lowered. It is economically useless.

  Here, the ultraviolet absorbing performance may be provided only by the ultraviolet absorbing layer 4A, but the ultraviolet absorbing layer 4A and other layers such as the colored adhesive layer 3, the transparent substrate 5, the silicone adhesive layer 6 and the like. Or the ultraviolet light absorbing layer 4A may be omitted, and the colored pressure-sensitive adhesive layer 3, the transparent base material 5, the silicone pressure-sensitive adhesive layer 6 and the like may be included.

  From the viewpoint of preventing the colorant of the colored pressure-sensitive adhesive layer 3 from deteriorating, when the other layer does not have ultraviolet absorption performance, the ultraviolet absorption layer 4A has a light transmittance of a wavelength of 380 nm of 1.5% or less. Is preferably reduced to 1.0% or less. When the other layer, for example, the colored pressure-sensitive adhesive layer 3 reduces the transmittance of light having a wavelength of 380 nm to 5.0% or less, the ultraviolet absorbing layer 4A has a transmittance of light having a wavelength of 380 nm of 7.0%. The following is preferable.

  When the transparent substrate 5 made of a plastic film having ultraviolet absorbing performance is used as the ultraviolet absorbing layer 4A, the formation of the ultraviolet absorbing layer 4 can be omitted in the method for manufacturing the transparent body pasting screen 1 described above. That is, the colored adhesive layer 3 as a constituent of “antireflection film 7 / light diffusion control layer 2 / colored adhesive layer 3” and the ultraviolet absorbing layer as a constituent of “transparent substrate 5 / silicone adhesive layer 6” By pasting 4A, it is possible to obtain a transparent body pasting screen 1 composed of “antireflection film 7 / light diffusion control layer 2 / colored adhesive layer 3 / transparent substrate 5 / silicone adhesive layer 6”. it can. Other steps are the same as those described above.

  EXAMPLES Hereinafter, although an Example etc. demonstrate this invention further more concretely, the scope of the present invention is not limited to these Examples etc.

[Examples 1 to 12, Reference Examples 1 to 4]
<Preparation of photocurable composition for light control film>
Obtained by reaction of polypropylene glycol having a weight average molecular weight of about 3,000 with 0.3 mol of tolylene diisocyanate, 2.7 mol of hexamethylene diisocyanate and 2 mol of 2-hydroxyethyl acrylate per 2 mol of the polypropylene glycol. Polyether urethane acrylate (refractive index 1.460) 40 parts by mass, 2,4,6-tribromophenyl acrylate (refractive index 1.6 or more) 30 parts by mass, 2-hydroxy-3-phenoxypropyl acrylate (Refractive index 1.526) 30 parts by mass and 2-hydroxy-2-methylpropiophenone 1.5 parts by mass were added and mixed to obtain a photocurable composition for a light control film.

<Production of light control film and light control film laminate>
The photocurable composition was applied onto a film-like transparent polyethylene terephthalate (hereinafter referred to as “PET film”) so that the thickness after drying was 170 μm.

An 80 W / cm rod-shaped high-pressure mercury lamp is fixed at a position 80 cm above the coating film, and is applied at a speed of 1 m / min through a light-shielding plate with a slit so that light shines vertically on the entire coating film surface. The following two types of light control films were prepared by irradiating light while moving the PET film with film in the lateral direction.
(1) Light control film in a light scattering angle region of 85 to 115 ° (width: 30 °; corresponding to 22a, b, and 23a, b in FIG. 2): Four (2) Light scattering angle region of 85 to 135 ° The light control film (width: 50 °; corresponding to 21a and b in FIG. 2): Two sheets were prepared. The light scattering angle region showing a haze value of 60% or more was measured by a conoscope.

  The obtained light control film was peeled off from the PET film, and two light control films having the same light scattering angle region were laminated so that the light scattering angle regions coincided to obtain a light control film laminate. That is, light control film stacks corresponding to the light control film stacks 21, 22 and 23 of FIG. 2 were obtained.

<Preparation of light diffusion control layer>
The obtained light control film laminate 23 was laminated using a laminator on the side of the antireflection film (manufactured by Toppan Printing Co., Ltd., “LR-TAC”) where the antireflection layer was not provided. Next, the light control film laminated body 22 was laminated on the light control film laminated body 23 so that the light control film laminated body 23 and the diffusion angle region were symmetric with respect to the normal direction of the laminated body. Then, the light diffusion control layer 2 was obtained by laminating the light control film laminate 21 on the light control film laminate 22. In this light diffusion control layer 2, the point light source incident from the normal direction diffuses in the vertical direction of 65 to 115 ° and in the horizontal direction of 45 to 135 °.

<Preparation of colored adhesive layer>
For 100 parts by mass of an acrylic copolymer (butyl acrylate: acrylic acid (mass ratio) = 97: 3, Mw = 800,000, solid content concentration 28% by mass), a polyisocyanate compound (manufactured by Toyo Ink Co., Ltd., "Olivein BHS8515", solid content concentration 37.5 mass%) 2 parts by mass, liquid dye (Hodogaya Chemical Industries, "Spiron Black MH", solid content concentration 30 mass%) 0.65 mass parts, And a predetermined amount of ultraviolet absorbers (made by Cytec Co., Ltd., “Siasorb UV-24”, solid content concentration of 100% by mass) described in Table 1 were mixed and used as a colored adhesive.

  This colored pressure-sensitive adhesive composition is coated on a release film (manufactured by Lintec Corporation, “SP-PLR38T103-1”) so that the film thickness after drying is 25 μm, and is colored by drying at 90 ° C. for 1 minute. An adhesive layer was formed. About the obtained colored adhesive layer, the luminous transmittance Y and the transmittance | permeability of the light of wavelength 380nm were measured based on the CIE1931 chromaticity diagram using the spectrophotometer (the Shimadzu Corporation make, "MPC3100"). The results are shown in Table 1.

<Preparation of silicone adhesive layer>
A platinum catalyst (Shin-Etsu Chemical Co., Ltd.) is added to 100 parts by mass of an addition-type organopolysiloxane (organized by Shin-Etsu Chemical Co., Ltd., “KS-847H”) composed of an organopolysiloxane having a siloxane bond as the main skeleton and a vinyl group and an organohydrogenpolysiloxane. (Manufactured, “PL-50T”) was added in an amount of 0.03 parts by mass, and diluted with methyl ethyl ketone to a solid content concentration of about 20% by mass to obtain a silicone rubber solution.

The silicone rubber solution, PET film (manufactured by Toyobo Co., "Cosmo Shine PET50 A 4300") as a transparent substrate on one surface of, 30 g / ^{m 2} (after drying) was coated by a knife coater, and heated for 2 minutes at 130 ° C. Cured to form a silicone adhesive layer. The surface of the obtained silicone pressure-sensitive adhesive layer was protected with a PET film as a process sheet (“Lumirror T60” manufactured by Toray Industries, Inc., thickness: 38 μm).

<Preparation of UV absorbing layer>
For 100 parts by mass of acrylic copolymer (butyl acrylate: methyl acrylate: 2-hydroxyethyl acrylate (mass ratio) = 89: 10: 1, Mw = 900,000, solid content concentration 29% by mass) 0.5 parts by mass of an isocyanate compound (manufactured by Soken Chemical Co., Ltd., “TD-75”, solid content concentration 75% by mass) and an ultraviolet absorber (manufactured by Cytec Co., Ltd., “Siasorb UV-24”, solid content concentration 100% by mass) ) Was added in a predetermined amount as shown in Table 1 and mixed, and this was used as an ultraviolet absorbing adhesive.

  Next, the UV-absorbing pressure-sensitive adhesive was applied to the release-treated surface of a release film (manufactured by Lintec Corporation, “SP-PET 381031”, thickness: 38 μm) with a knife coater so that the film thickness after drying was 25 μm. An ultraviolet absorption layer was formed by drying at 1 ° C. for 1 minute. About the obtained ultraviolet absorption layer, the luminous transmittance Y and the transmittance | permeability of the light of wavelength 380nm were measured based on the CIE1931 chromaticity diagram using the spectrophotometer (the Shimadzu Corporation make, "MPC3100"). The results are shown in Table 1.

<Preparation of screen for attaching transparent body>
The obtained ultraviolet absorbing layer and the other surface of the transparent substrate on which the silicone pressure-sensitive adhesive layer was formed were bonded together.

  The obtained colored pressure-sensitive adhesive layer and the ultraviolet absorbing layer (with the release film on the ultraviolet absorbing layer peeled off) were bonded together, and “peeled film / colored pressure-sensitive adhesive layer / ultraviolet absorbing layer / transparent substrate / silicone adhesive”. It was set as the laminated body which consists of an agent layer / release film.

  Further, the release film of the light diffusion control layer 2 formed on the antireflection film is peeled off, and a laminate comprising the above-mentioned “release film / colored adhesive layer / ultraviolet absorbing layer / transparent substrate / silicone adhesive layer / release film”. The release film on the colored pressure-sensitive adhesive layer side was peeled off, and the light diffusion control layer 2 and the colored pressure-sensitive adhesive layer were bonded.

  Finally, in order to improve interlayer adhesion, a transparent body pasting screen 1 was obtained by treating at 50 ° C. and 0.9 MPa for 1 hour in an autoclave (manufactured by Kurihara Seisakusho).

  When the obtained transparent body pasting screen was cut into 100 mm × 100 mm and pasted on a window glass, it could be pasted without air bubbles or the like being mixed therein. Furthermore, after pasting, it was possible to peel off the window glass without leaving any adhesive.

  The obtained transparent screen was measured for luminous transmittance Y and hue changes Δx and Δy based on the CIE1931 chromaticity diagram using a spectrophotometer (manufactured by Shimadzu Corporation, “MPC3100”). The results are shown in Table 1. Table 2 shows the results of the luminous transmittance Y after the light resistance test described later, the change amount ΔY of the luminous transmittance Y by the light resistance test, and the hue changes Δx and Δy.

[Comparative Example 1]
In Example 1, instead of the silicone pressure-sensitive adhesive, the acrylic pressure-sensitive adhesive (acrylic copolymer (butyl acrylate: methyl acrylate: 2-hydroxyethyl acrylate (mass ratio) = 89: 10: 1) used for the colored pressure-sensitive adhesive layer. , Mw = 900,000, solid content concentration 29% by mass) 100 parts by mass, 0.5 parts by mass of polyisocyanate compound (manufactured by Soken Chemical Co., Ltd., “TD-75”, solid content concentration 75% by mass). A transparent sticking screen was prepared in the same manner as in Example 1 except that the added one was used.

  The obtained screen was cut into a size of 100 mm × 100 mm and attached to a window glass to confirm the state of bubbles. As a result, bubbles remained in the screen in various places. Further, when the screen was peeled off from the window glass, adhesive residue was found on the window glass.

[Comparative Example 2]
In Example 1, a transparent body pasting screen having the same configuration was produced except that the colorant was removed from the colored pressure-sensitive adhesive layer.

About the obtained screen, the backscattering mentioned later was measured. As a result, the screen brightness at the incident angles of 15 ° and 60 ° of the white projector light is 2.60 (cd / m ² ) and 0.50 (cd / m ² ), respectively, and the screen has a large backscattering. I understood that.

[Test Example 1] (Measurement of backscattering)
The transparent body pasting screens obtained in Examples and Reference Examples were cut to 50 mm × 100 mm, the release film on the silicone adhesive layer was peeled off, and laminated on soda glass having a size of 70 mm × 150 mm and a thickness of 1.1 mm did. In order to prevent the influence of reflection on the surface of soda glass, an antireflection film (manufactured by Toppan Printing Co., Ltd., “LR-TAC”) was bonded to the rear surface of the glass, and this was used as Sample 10.

  The side of the sample 10 on which the silicone adhesive layer was applied was the front side, and the black box 11 was placed on the back side of the sample 10 as shown in FIG. 4 to remove the influence of reflected light. By measuring in the absence of projector light as an image, it is possible to measure purely the influence of backscattering.

White projector light (265 lx: measured with “3423LUX HiTESTER” manufactured by HIOKI) from the projector P is incident on the front side of the sample 10 from the direction of 15 ° and 60 ° from the projector P, and the screen brightness of the sample 10 ( cd / m ² ) was measured from an angle of 0 ° (normal direction of the sample) (measured with a luminance meter “LS-110” manufactured by Minolta). The results are shown in Table 1.

Here, the smaller the screen brightness value at each of the white light incident angles of 15 ° and 60 ° in Table 1, the more effectively the backscattering is suppressed, and at least the comparison without the colored adhesive layer. If it is significantly smaller than the screen luminance value in Example 2, it can be seen that backscattering is suppressed. In addition, since it is dependent on the intensity | strength of ambient light, etc. about backscattering, a clear reference | standard cannot be provided, but in this test example, it is 1.50 cd / m < ² > or less in white light incident angle 15 degrees, and white light incident angle If it is suppressed to a value of 0.30 cd / m ² or less at 60 °, it is considered that backscattering does not cause a problem in practice.

[Test Example 2] (Light resistance test)
On the PET film (Toyobo Co., Ltd., “Cosmo Shine PET100 A4300”), the colored adhesive layer and the UV absorbing layer (in Reference Examples 1 to 4, UV rays in Examples 1 to 12 and Reference Examples 1 to 4) A laminate comprising a transparent base material and a silicone pressure-sensitive adhesive layer and a soda glass of 70 mm × 150 mm size and 1.1 mm thickness attached via the silicone pressure-sensitive adhesive layer. Was used as a sample.

  The sample was put into a fade meter (carbon arc, black panel temperature 63 ° C.) and irradiated with ultraviolet rays for 200 hours from the glass plate side. The obtained evaluation sample was measured for luminous transmittance Y and hue changes Δx and Δy based on the CIE1931 chromaticity diagram using a spectrophotometer (manufactured by Shimadzu Corp., “MPC3100”) and The amount of change ΔY obtained by subtracting the luminous transmittance before ultraviolet irradiation from the luminous transmittance Y was calculated. The results are shown in Table 2. If ΔY is 3% or less, it can be said that the deterioration of the colorant of the screen is very effectively prevented.

  Here, FIG. 5 shows the relationship between the light transmittance at a wavelength of 380 nm of the colored pressure-sensitive adhesive layer and the change ΔY in luminous transmittance for each ultraviolet absorbing layer having a different light transmittance at a wavelength of 380 nm.

  As is clear from Table 1, the transparent body pasting screens of Examples 1 to 12 had low backscattering. Further, from Table 2 and FIG. 5, by comparing Examples 1 to 12 with Reference Examples 2 to 4, it is more light-resistant to provide a separate UV absorbing layer than just adding the UV absorber to the colored adhesive layer. It became clear that there was an effect on sex.

  Furthermore, in order to make ΔY after a light resistance test of a transparent body pasting screen 3% or less, when an ultraviolet absorber is added to the colored adhesive layer, the transmittance of the ultraviolet absorbing layer at a wavelength of 380 nm is 7% or less. In addition, it has been clarified that this can be realized by setting the transmittance of the colored adhesive layer at a wavelength of 380 nm to 4% or less. On the other hand, when no ultraviolet absorber was added to the colored pressure-sensitive adhesive layer, it was revealed that this can be realized by setting the transmittance of the ultraviolet absorbing layer at a wavelength of 380 nm to 1% or less.

  The transparent body pasting screen of the present invention is suitably used as a transmission type projection screen stuck on a window glass or the like in terms of visibility, light resistance, durability, removability and the like.

P ... Projector G ... Window glass (transparent)
DESCRIPTION OF SYMBOLS 1,1A ... Screen for transparent body sticking 2 ... Light diffusion control layer 3 ... Colored adhesive layer 4, 4A ... Ultraviolet absorbing layer 5 ... Transparent base material 6 ... Silicone adhesive layer 7 ... Antireflection film 21, 22, 23 ... Light control film laminates 21a, 21b, 22a, 22b, 23a, 23b ... Light control film 10 ... Sample 11 ... Black box

Claims (10)

A screen that is affixed to a transparent body and projected from a projector,
A light diffusion control layer for controlling light diffusion;
A colored adhesive layer;
An ultraviolet absorbing layer;
A silicone pressure-sensitive adhesive layer containing a silicone-based pressure-sensitive adhesive bonded to the transparent body ,
The colored adhesive layer is colored with a metal complex dye,
The transparent sticking screen, wherein the colored pressure-sensitive adhesive layer has a thickness of 10 to 35 m .   The light diffusion control layer includes a light control film obtained by irradiating and curing a film of a composition containing at least two kinds of photopolymerizable compounds having a difference in refractive index. The screen for sticking a transparent body according to claim 1. The color change of transmitted light by the colored pressure-sensitive adhesive layer is within ± 0.0030 in hue changes Δx and Δy defined by the CIE1931 chromaticity diagram, and the luminous transmittance Y of the colored pressure-sensitive adhesive layer The screen for sticking a transparent body according to claim 1 or 2 , wherein the ratio is 15 to 90%. The said ultraviolet absorption layer reduces the transmittance | permeability of the light of a wavelength of 380 nm to 1.5% or less, The screen for transparent body sticking as described in any one of Claims 1-3 characterized by the above-mentioned. The ultraviolet absorbing layer reduces the transmittance of light having a wavelength of 380 nm to 7.0% or less, and the colored adhesive layer contains an ultraviolet absorber, and the transmittance of light having a wavelength of 380 nm is 5. It reduces to 0% or less, The screen for transparent body sticking as described in any one of Claims 1-4 characterized by the above-mentioned. The said ultraviolet absorption layer is an adhesive layer containing a ultraviolet absorber, The screen for transparent body sticking as described in any one of Claims 1-5 characterized by the above-mentioned. The transparent body pasting screen according to any one of claims 1 to 6, wherein a transparent substrate is further interposed between the ultraviolet absorbing layer and the silicone pressure-sensitive adhesive layer. Transparency sticking screen according to any one of claims 1 to 7, comprising the antireflection layer on the outermost layer of the projector. The antireflection layer, the light diffusion control layer, the colored adhesive layer, the ultraviolet absorbing layer, and the silicone adhesive layer are laminated in order from the projector side. The screen for transparent body sticking as described in any one of 8. The antireflection layer, the light diffusion control layer, the colored adhesive layer, the ultraviolet absorbing layer, the transparent base material, and the silicone adhesive layer are laminated in order from the projector side. The transparent body pasting screen according to any one of claims 1 to 8.

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