JP6102193B2 - Screen and method for manufacturing screen - Google Patents

Description

  The present invention relates to a screen that displays image light projected from a projector so as to be visible and a method for manufacturing the screen.

  Usually, the screen that displays the image light projected from the projector in a viewable manner is intended to display the image light projected from the projector regardless of whether it is a reflective type or a transmissive type. (Back side) cannot be observed. In the transmissive screen, the image light is displayed by transmitting the image light projected from the back side to the observer side (front side), so that the light from the back side can be transmitted. However, in such a transmission type screen, the surface is provided with irregularities or a light diffusion layer for the purpose of widening the viewing angle of the image light, etc., and light transmission is possible. The situation cannot be observed.

  Japanese Patent Application Laid-Open No. H10-260260 discloses a technique that allows a transparent portion to be formed by forming a plurality of holes in such a transmission type screen to visually recognize the background of the screen.

  Further, Patent Document 2 discloses a unit prism shape capable of transmitting light, a light absorbing portion arranged between a plurality of unit prism shapes, and a light provided from the back side to reflect image light and light from the back side. A transflective screen including a reflective / transmissive layer capable of transmitting light is disclosed. According to this, the image light transmitted through the unit prism shape is reflected by the reflection / transmission layer and provided to the viewer side, so that it functions as a screen and the back side can be observed through the unit prism shape. Has been.

JP 2006-133636 A JP 2006-243893 A

  However, the screen having the configuration disclosed in Patent Document 1 has a problem in that the contrast is lowered because external light is diffused in the same manner as image light. On the other hand, in the screen having the structure disclosed in Patent Document 2, since the light absorbing portion is provided, external light can be absorbed and the contrast can be improved. A lot of light to be provided to the user side is also absorbed, and there is a problem that the brightness is insufficient when observing the image light to be displayed and the state of the back side.

  In view of the above problems, an object of the present invention is to provide a screen that can display an image brightly and can improve contrast, and has excellent visibility on either side. A method for manufacturing the screen is also provided.

  The present invention will be described below.

The invention according to claim 1 is a screen that displays the image light projected from the projector so as to be visible to an observer, and has a translucent sheet-like base material layer and one surface of the base material layer. A light-scattering layer that scatters light, and a plurality of light-scattering layers arranged side by side along one surface of the base material layer and transmitting light, A light scattering portion that is disposed between a plurality of light transmission portions and scatters light, and a prospective angle of the light scattering layer is an angle that becomes upward as it goes to the viewer side in a posture in which the screen is vertical, greater than angle a downward toward the viewer side no longer, in vertical and posture of the screen, passing through the screen without a part of the light from the opposite side to reach the light scattering portion and the observer across the screen In addition, one of the light incident on the light scattering layer from diagonally above the viewer There passes through the screen without reaching the light scattering section is a screen.

  Here, the “expected angle” means an angle smaller than 90 ° among angles formed by the diagonal line of the light transmission part between the adjacent light scattering parts and the normal line of the screen.

  According to a second aspect of the present invention, in the screen according to the first aspect, the light scattering portion contains a white or silver pigment and scatters light by scattering reflection.

  According to a third aspect of the present invention, in the screen according to the second aspect, the pigment has conductivity.

  The invention according to claim 4 is the screen according to claim 1, wherein the light scattering portion is filled with a transparent resin and a particulate light scattering agent having a refractive index different from that of the transparent resin. Light is scattered when light passes through the light scattering portion.

  According to a fifth aspect of the present invention, in the screen according to any one of the first to fourth aspects, the light transmitting portion and the light scattering portion are horizontal with a predetermined cross section in a posture in which the screen is arranged vertically. Extend in the direction.

  According to a sixth aspect of the present invention, in the screen according to any one of the first to fourth aspects, the light transmitting portion and the light scattering portion have a predetermined cross section and extend in an arc shape.

  The invention according to claim 7 is the screen according to any one of claims 1 to 4, wherein the light scattering portions are formed in a lattice shape.

  According to an eighth aspect of the present invention, in the screen according to any one of the first to seventh aspects, a blackening layer is formed at the interface between the light transmitting portion and the light scattering portion.

According to a ninth aspect of the present invention, in the screen according to any one of the first to eighth aspects, the light transmitting portion transmits light without scattering the light.
Here, “transmits light without scattering light” means that it is formed without intentionally adding a material that scatters light, and is unavoidable when light passes through the material. It is permissible for the scattering to occur.

  The invention according to claim 10 is a method for producing the screen according to any one of claims 1 to 9, wherein the intermediate sheet in which the light transmitting portions are formed at predetermined intervals on the base material layer is provided with light. It is a method for manufacturing a screen, comprising a step of supplying an excessive amount of a composition to be a scattering portion and scraping the composition with a blade to fill the composition between light transmission portions.

  The invention according to claim 11 is a method for manufacturing the screen according to any one of claims 1 to 9, and should be a light scattering portion in a mold having a groove corresponding to the uneven shape of the light scattering portion. Supplying the composition in excess, scraping the composition with a blade and filling the groove with the composition, bringing the substrate layer into contact with the mold to cure the composition, and light scattering on the substrate layer A method for producing a screen, comprising: a step of producing an intermediate sheet in which a portion is formed; and a step of supplying the composition to be a light transmission portion to the intermediate sheet to form the light transmission portion.

  According to the present invention, an image can be displayed brightly, the influence of external light can be reduced, and contrast can be improved. Therefore, the screen is excellent in image light and visibility on the back side.

2 is a perspective view illustrating a screen 100. FIG. FIG. 2 is a diagram showing a cross section of a screen 100 and schematically showing a layer configuration. It is the figure which expanded and showed the light-scattering layer of the screen. 4A is an example of a light scattering part 116a having a trapezoidal cross section, FIG. 4B is an example of a light scattering part 116b having a convex slope, and FIG. 4C is a light scattering curve having a concave slope. An example of the part 116c and FIG. 4D are examples of the light scattering part 116d having a beveled polygonal line. It is a figure explaining the light-scattering part 116e of the example whose bottom part in a cross section is concave shape. FIG. 4 is a diagram illustrating a scene of a manufacturing process of a light scattering layer of a screen 100. It is the figure which showed the cross section of the screen 200 and represented the layer structure typically. It is a figure showing the scene of the manufacturing process of the light-scattering layer of the screen. FIG. 3 is a diagram showing a cross section of a screen 300 and schematically showing a layer configuration. It is a figure explaining the form of the screen. It is a figure explaining the form of the screen. It is the figure which showed the cross section of the screen 600, and represented the layer structure typically. It is the figure which expanded and showed the light-scattering layer of the screen. It is the figure which expanded and showed the light-scattering layer in the modification of the screen. It is a perspective view explaining the screen 700. FIG. It is the figure which showed the cross section of the screen 700, and represented the layer structure typically. 3 is a diagram illustrating a configuration of a light scattering layer of Example 1. FIG. It is a figure explaining the structure of the light-scattering layer of the comparative example 1. It is a figure explaining the measuring method of a front gain.

  The above-described operation and gain of the present invention will be clarified from embodiments for carrying out the invention described below. Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to the embodiment. Moreover, in each figure shown below, a shape may be exaggerated for easy understanding, and a repeated reference may be omitted for easy viewing.

[Reflective screen]
FIG. 1 is a perspective view of a screen 100 according to the first embodiment, which is shown together with the projector 10. The screen 100 and the projector 10 constitute a video display device. The screen 100 of this embodiment is a permanent type (fixed type reflective screen) among reflective screens. Accordingly, as can be seen from FIG. 1, the screen 100 has the front side of the observer represented by A, the projector 10 installed on the front side, and the opposite side (side where the rear side object B exists) is the back side. .

  2 shows a cross section of the screen 100 in the vertical direction along the line indicated by II-II in FIG. 1 in the posture in which the screen 100 is installed (that is, the posture in which the screen surface is set up vertically). It is the figure represented typically.

  The screen 100 includes a panel 111 and a laminate 112 bonded to the panel 111 from the back side. And the laminated body 112 is provided with the contact bonding layer 113, the light-scattering layer 114, the base material layer 117, the contact bonding layer 118, and the hard-coat layer 119 from the back side. Hereinafter, these components constituting the screen 100 will be described. In FIG. 2, the left side of FIG. 2 is the back side, the right side is the front side (observer side), the top is the top, and the bottom is the ground.

  The panel 111 is a plate-like panel having translucency, such as a glass panel or a resin panel. Therefore, a known plate glass or resin panel can be used as a member constituting the panel 111. This enables stable installation as a fixed screen.

  The adhesive layer 113 is a layer for adhering the laminate 112 to the panel 111. The material constituting the adhesive layer 113 is not particularly limited as long as the laminate 112 can be bonded to the panel 111, and a known pressure-sensitive adhesive, adhesive, photo-curing resin, thermosetting resin, or the like is used. it can. As a material constituting the adhesive layer 113, for example, an acrylic adhesive can be used, and more specifically, an adhesive obtained by combining an acrylic copolymer and an isocyanate compound can be used. However, the material constituting the adhesive layer 113 is preferably excellent in translucency and weather resistance due to the properties of the screen 100.

  The thickness of the adhesive layer 113 is not particularly limited, but is preferably 10 μm or more and 100 μm or less. If the adhesive layer 113 is too thin, the adhesion between the panel 111 and the laminate 112 may be reduced. If the adhesive layer 113 is too thick, it is difficult to make the thickness of the adhesive layer 113 uniform.

  The light scattering layer 114 has a light transmitting portion 115 and a light scattering portion 116, has the cross section shown in FIG. 2, and extends as indicated by a broken line in FIG. That is, the light transmitting part 115 and the light scattering part 116 having a cross section shown in FIG. 2 are arranged so as to extend in one direction along the screen surface (horizontal direction in the present embodiment). A plurality of light transmission portions 115 are arranged along screen surfaces in different directions (vertical direction in the present embodiment). On the other hand, the light scattering part 116 is disposed between the light transmission parts 115. FIG. 3 shows an enlarged view of a part of the light scattering layer 114.

  The light transmitting portion 115 is a portion that transmits light, and the surface on the base material layer 117 side and the opposite side surface (the surface on the adhesive layer 113 side) of the light transmitting portion 115 are formed in parallel. This makes it easier to see the scenery on the back side through the screen 100 as will be described later. Preferably, the light transmission part transmits light without scattering. This improves the visibility of the backside scenery. Here, “transmits without scattering light” means a portion formed without adding a material that intentionally scatters, and inevitably occurs when light passes through the material. Scattering is allowed to occur.

  Examples of the material constituting the light transmitting portion 115 include transparent resins mainly composed of one or more of acrylic, styrene, polycarbonate, polyethylene terephthalate, acrylonitrile, etc., and epoxy acrylate or urethane acrylate reactive resins (ionizing radiation). Curable resin).

  The light scattering part 116 is a part formed between two adjacent light transmission parts 115. That is, as described above, the light transmission portions 115 are arranged in parallel in the direction along the sheet surface at a predetermined interval, and concave portions having a substantially triangular cross section are formed between the light transmission portions 115. The concave portion in the present embodiment is a groove having a triangular cross section having a base on the panel 111 side (back side) and a vertex facing the base on the base material layer 117 side (front side). The light scattering portion 116 is formed by filling the material constituting the material 116. Accordingly, the light scattering portion 116 also has a cross section based on the recess.

The light scattering unit 116 is a part configured to be able to scatter and reflect the light irradiated here. Therefore, the light scattering portion 116 is filled with a material for scattering and reflecting light. Although the material for that is not specifically limited, As an example, curable resin which mixed light-scattering agents, such as a white pigment and a silver pigment, is mentioned. Examples of the white pigment include metal oxides such as titanium oxide, titanium dioxide, magnesium oxide, and zinc oxide. As a silver pigment, metals, such as aluminum and chromium, are mentioned, for example. Thereby, light can be efficiently scattered and reflected. Further, the curable resin can be the same as the material constituting the light transmission portion 115.
Further, the light scattering portion 116 may be made of a material obtained by mixing a transparent binder resin and a transparent scattering agent having a refractive index different from that of the binder resin. As the transparent binder resin, the same resin as the light transmitting portion 115 can be used. On the other hand, examples of the transparent scattering agent include cross-linked particles obtained by polymerizing monomers mainly composed of (meth) acrylic acid ester and styrene. Specific examples of the crosslinked particles include Gantz Pearl (registered trademark) manufactured by Gantz Kasei Co., Ltd. The cross-linked particles can be controlled in refractive index by changing the mixing ratio of acrylic acid ester and styrene. For example, the refractive index can be made about 1.49 by increasing the acrylic ratio, and the refractive index can be made about 1.59 by increasing the styrene ratio. Further, urethane cross-linked particles can be used as the scattering agent. Specific examples of the urethane cross-linked particles include Art Pearl (registered trademark) manufactured by Negami Kogyo Co., Ltd. The scattering agent can also be hollow particles.

The refractive index of the light scattering portion 116 (the refractive index of the curable resin or binder resin described above) is preferably the same as the refractive index of the light transmitting portion 115. Thereby, refraction at the interface between the light transmitting portion 115 and the light scattering portion 116 and wavelength dispersion due to this can be prevented, and the occurrence of rainbow-like unevenness (pattern) observed on the screen can be suppressed.
However, this does not prevent the light scattering portion 116 and the light transmission portion 115 from being formed to have different refractive indexes. For example, if the refractive index of the light scattering portion 116 is formed to be lower than the refractive index of the light transmitting portion 115, when the light incident on the interface is larger than the total reflection critical angle, the light is reflected using total reflection. be able to.

  The light scattering portion 116 can also be made of a conductive material. According to this, the light scattering layer can be configured as a so-called touch panel, and its function can be added. A means for imparting conductivity to the light scattering portion 116 is not particularly limited, and examples thereof include using a conductive material such as a metal as a material for scattering and reflecting light.

Furthermore, in the present embodiment, the light scattering unit 116 has a configuration having the following characteristics. This will be described with reference to FIG.
Between the two light scattering portions 116, the light transmitting portion 115 is disposed as described above. Therefore, as shown by IIIa and IIIb in FIG. 3, lines corresponding to the diagonal lines of the light transmitting portion 115 can be defined. That is, for the opposite sides of the adjacent light scattering portions 116, the line IIIa connecting the viewer side end of one side and the back side end of the other side, and the back side end of the one side and the other side Consider the line IIIb connecting the end of the observer side.
Of the two lines IIIa and IIIb, an angle formed by an upper line IIIa and a normal line of the screen 100 as it goes toward the viewer is smaller than 90 ° is defined as a first prospective angle θ ₁ . On the other hand, an angle formed by the line IIIb that becomes lower toward the viewer side and the normal line of the screen 100 is smaller than 90 ° is defined as a second prospective angle θ ₂ .
In the present embodiment, θ ₁ > θ ₂ . As a result, as described later, a part of the external light from the observer side can be efficiently transmitted to the back side.

Here, θ ₁ is preferably 40 ° or more and 70 ° or less. This is because there is much external light incident on the screen from above at an angle in this range.
On the other hand, regarding θ ₂ , from the viewpoint of efficiently irradiating the light scattering unit 116 with the image light from the lower side emitted from the projector 10 and providing this to the observer side, the optical axis of the image light is the screen normal. It is preferable to make θ ₂ smaller than the angle formed. Although the installation position of the projector varies depending on the specifications of the projector, it is preferable that θ ₂ is 15 ° or more and less than 40 ° in consideration of the installation position of a normal projector.

  In the present embodiment, the example in which the light scattering portion 116 has a triangular cross section has been described. However, the present invention is not limited to this, and the light scattering portion may be trapezoidal. At this time, the trapezoidal leg corresponds to the hypotenuse of the triangular section. Further, the hypotenuse of the triangular cross section and the leg portion of the trapezoidal cross section may be curved or polygonal. FIG. 4 shows the cross-sectional shape of the light scattering portion of each example. 4A is an example of a light scattering part 116a having a trapezoidal cross section, FIG. 4B is an example of a light scattering part 116b having a convex slope, and FIG. 4C is a light scattering curve having a concave slope. An example of the part 116c and FIG. 4D are examples of the light scattering part 116d having a beveled polygonal line.

  FIG. 5 shows a light scattering portion 116e of an example in which the bottom side (opening side of the groove formed between the light transmission portions) of the cross section of the light scattering portion is formed in a concave shape. In this case, the inside of the concave shape is filled with the adhesive of the adjacent adhesive layer 113. By having such a concave shape, refraction and scattering at the interface in the concave portion can be used, and further, it can be an element for controlling light.

  Further, from the viewpoint of facilitating scattering and reflection, the interface between the light scattering portion 116 and the light transmitting portion 115 may be a matte surface that is a surface on which countless minute irregularities are formed.

The pitch at which the light scattering portions 116 are arranged in parallel is not particularly limited, but is preferably 10 μm or more and 200 μm or less. If the pitch of the light scattering portions 116 is too narrow, the function of transmitting outside light, which will be described later, by the light scattering layer 114 may be reduced, and processing becomes difficult because the shape becomes fine. On the other hand, if the pitch of the light scattering portions 116 is too wide, the releasability of the material tends to decrease when molding with a mold.
Of the cross section of the light scattering portion 116, the width on the panel 111 side (back side) is not particularly limited, but is preferably 5 μm or more and 150 μm or less. If this width is too narrow, it becomes a fine shape, making processing difficult. On the other hand, if this width is too wide, the releasability of the material tends to decrease when molding with a mold.

  The size of the light scattering portion 116 in the thickness direction (the left-right direction in FIG. 3) is not particularly limited, but is preferably 10 μm or more and 200 μm or less. If the light scattering layer 114 is too thin, the height (size in the thickness direction) of the light scattering portion 116 is insufficient and the desired optical effect is reduced, or the processing itself of the light scattering portion 116 becomes difficult. There is a risk that. On the other hand, if the light-scattering layer 114 is too thick, the light-scattering portion 116 becomes too high, and the production of the mold for that purpose and the releasability of the material from the mold are lowered, and the productivity may be deteriorated. .

Returning to FIG. 2, the base material layer 117 will be described. The base material layer 117 is a layer serving as a base material for forming the light scattering layer 114.
Accordingly, the base material layer 117 has a light transmitting property and supports the light scattering layer 114 so as to prevent deformation. From this viewpoint, as specific examples of the material constituting the base material layer 117, for example, a transparent resin mainly composed of one or more of acrylic, styrene, polycarbonate, polyethylene terephthalate, acrylonitrile, and the like, epoxy acrylate, and urethane acrylate The reactive resin (ionizing radiation curable resin etc.) can be mentioned.

  Although the thickness of the base material layer 117 is not specifically limited, It is preferable that they are 25 micrometers or more and 300 micrometers or less. If the thickness of the base material layer 117 is out of this range, there is a possibility of causing a problem in workability. For example, if the base material layer 117 is too thin, wrinkles are likely to occur. Moreover, if the base material layer 117 is too thick, winding will become difficult in an intermediate process among the processes which manufacture the screen 100. FIG.

  Here, the refractive index of the base material layer 117 may be the same as or different from the refractive index of the light transmitting portion 115 of the light scattering layer 114. However, if there is a difference in refractive index between the two, the possibility of light being deflected at the interface increases, so even if they are the same material or different materials, the refractive index difference is small or there is no refractive index difference. It is preferable.

  The adhesive layer 118 is a layer for attaching the hard coat layer 119 to the surface of the base material layer 117 opposite to the light scattering layer 114. There are no particular limitations on the material used for the adhesive layer 118, but any material can be used as long as it has the above-described purpose and has translucency. For this, for example, a known pressure-sensitive adhesive, adhesive, ultraviolet curable resin, ionizing radiation curable resin, photocurable resin, thermosetting resin, or the like can be used. For example, an acrylic pressure-sensitive adhesive can be used, and more specifically, a pressure-sensitive adhesive obtained by combining an acrylic copolymer and an isocyanate compound can be used.

  The thickness of the adhesive layer 118 is not particularly limited, but is preferably 10 μm or more and 100 μm or less. If the adhesive layer 118 is too thin, the adhesion between the hard coat layer 119 and the light scattering layer 114 may be reduced. If the adhesive layer 118 is too thick, it is difficult to make the thickness of the adhesive layer 118 uniform.

The hard coat layer 119 is a layer provided on the outermost surface of the screen 100 opposite to the panel 111 for the purpose of surface protection. The hard coat layer 119 can be formed as a transparent resin layer, and is preferably formed as a cured resin layer formed by curing a curable resin from the viewpoint of resistance to scratches and surface contamination.
Specifically, an ionizing radiation curable resin, other known curable resins, or the like may be appropriately employed according to the required performance. Examples of the ionizing radiation curable resin include acrylate-based, oxetane-based, and silicone-based resins. For example, acrylate-based ionizing radiation curable resins include monofunctional (meth) acrylate monomers, bifunctional (meth) acrylate monomers, (meth) acrylate monomers such as trifunctional or higher (meth) acrylate monomers, urethane (meta ) Acrylate, epoxy (meth) acrylate, polyester (meth) acrylate and other (meth) acrylate ester oligomers or (meth) acrylate ester prepolymers. Examples of tri- or higher functional (meth) acrylate monomers include trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and the like.

Further, the hard coat layer 119 may be added with a function of improving the stain resistance. This can be achieved, for example, by adding a silicone compound, a fluorine compound, or the like. Further, as other functions, it may have a function of improving antistatic properties and water repellency.
As materials that can be used for improving the antistatic property, PEDOT-PSS (PEDOT (Poly (3,4-ethylenedioxythiophene); 3,4-ethylenedioxythiophene polymer) and PSS (polynesulfonate) are used for the electron conduction type. ); A styrene sulfonic acid polymer)), and the ionic conductive type includes lithium salt materials.
Examples of materials that can be used to improve water repellency include fluorine compounds.

  The screen 100 having the configuration described above can be manufactured, for example, as follows.

  The screen 100 can be manufactured by laminating the laminated body 112 to the panel 111, and the laminated body 112 can be produced as follows, for example.

  Of the laminate 112, the light scattering layer 114 is formed by a method using a mold roll. That is, a mold roll is prepared in which a plurality of grooves corresponding to the shape of the light transmission portion 115 of the light scattering layer 114 are provided on the outer peripheral surface of the cylindrical roll. And the base material used as the base material layer 117 is inserted between a mold roll and the nip roll arrange | positioned so as to oppose this. At this time, an adhesive layer 118 is preferably formed in advance on one surface of the substrate. At that time, a release sheet is attached to the surface of the adhesive layer 118 opposite to the substrate so that the adhesive layer 118 does not stick to the other. Then, the mold roll and the nip roll are rotated while supplying the composition constituting the light transmitting portion 115 between the surface of the substrate where the adhesive layer 118 is not disposed and the mold roll. Thus, the composition forming the light transmitting portion 115 is filled in the groove formed on the surface of the mold roll, and the composition conforms to the surface shape of the mold roll.

  Here, as a composition which comprises the light transmissive part 115, although what was described above is preferable, it is as follows more specifically. That is, the photocurable resin composition which mix | blended the reactive dilution monomer (M1) and the photoinitiator (I1) with the photocurable prepolymer (P1) can be used.

  Examples of the photocurable prepolymer (P1) include epoxy acrylate-based, urethane acrylate-based, polyether acrylate-based, polyester acrylate-based, and polythiol-based prepolymers.

  Examples of the reactive dilution monomer (M1) include vinyl pyrrolidone, 2-ethylhexyl acrylate, β-hydroxy acrylate, and tetrahydrofurfuryl acrylate.

  Examples of the photopolymerization initiator (I1) include hydroxybenzoyl compounds (2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, benzoin alkyl ether, etc.), benzoyl Formate compounds (such as methylbenzoylformate), thioxanthone compounds (such as isopropylthioxanthone), benzophenone compounds (such as benzophenone), phosphate compounds (1,3,5-trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6) -Trimethylbenzoyl) -phenylphosphine oxide, etc.), benzyldimethyl ketal and the like. Among these, the irradiation device for curing the photocurable resin composition and the curability of the photocurable resin composition can be arbitrarily selected. From the viewpoint of preventing coloring of the light transmitting portion 115, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone and bis (2,4,6-trimethylbenzoyl) are preferable. ) -Phenylphosphine oxide.

  These photocurable prepolymer (P1), reactive diluent monomer (M1) and photopolymerization initiator (I1) can be used alone or in combination of two or more.

  Light is irradiated from the base material side by a light irradiation device to the composition constituting the light transmission portion 115 sandwiched between the mold roll and the base material and filled therein. Thereby, the composition which comprises the light transmissive part 115 can be hardened, and the shape can be fixed. And the light transmission part 115 arranged in parallel on the base material layer 117 and the base material layer 117 is released from the mold roll by the release roll.

Next, a light scattering portion 116 is formed in a recess formed between the plurality of light transmission portions 115. FIG. 6 shows a scene of the process. A composition 120 (a composition in which a material that reflects and scatters the above-described light in a predetermined concentration is dispersed in an ionizing radiation curable resin or other known curable resin) is used as the light. An excessive amount is supplied to the recesses 115 a between the transmission parts 115. Next, the upper surface of the light transmission portion 115 is squeezed by the blade 121 to scrape off and remove the excess composition, and the recess 115a is filled with the composition.
An appropriate curing method is applied to the composition 120 thus filled to cure the curable resin. As a result, a light scattering portion 116 is formed and becomes a light scattering layer 114.

Next, a hard coat layer 119 is laminated on the adhesive layer 118. In the case where the adhesive layer 118 is made of an ultraviolet curable resin, a photocurable resin, or the like, it may be cured by irradiating ultraviolet rays or light after the lamination.
Further, an adhesive layer 113 is laminated on the light scattering layer 114 on the side opposite to the base material layer 117.

  The screen 100 can be manufactured by bonding the laminate 112 manufactured as described above to the panel 111 with the adhesive layer 113.

  The screen 100 may be provided with a configuration for adding another function to any of the above-described layers. For example, an ultraviolet absorber, a heat ray absorber, or a near-infrared absorber is added to provide an ultraviolet absorption function, a heat ray absorption function, or a near-infrared absorption function.

  The near-infrared absorbing function can be improved by adding or applying a near-infrared absorbing agent (near-infrared absorbing dye) to one or more of the above layers. As the near-infrared absorbing dye, it is preferable to use one that absorbs light in a wavelength region of 800 nm to 1100 nm. The near-infrared transmittance in the wavelength region is preferably 20% or less, and more preferably 10% or less. On the other hand, the near-infrared absorbing dye preferably has a sufficient transmittance in the visible light region, that is, in the wavelength region of 380 nm to 780 nm.

  The ultraviolet absorbing function can be improved by adding or applying an ultraviolet absorber exemplified below to one or more of the above layers. Examples of ultraviolet absorbers include benzotriazole ultraviolet absorbers (TINUVIN P, TINUVIN P FL, TINUVIN 234, TINUVIN 326, TINUVIN 326 FL, TINUVIN 328, TINUVIN 329, TINUVIN 329 FL, all manufactured by BASF Japan Ltd.), and triazine. Ultraviolet absorber (TINUVIN 1577 ED, manufactured by BASF Japan Ltd.), benzophenone ultraviolet absorber (CHIMASSORB 81, CHIMASORB 81 FL, all manufactured by BASF Japan Ltd.), benzoate ultraviolet absorber (TINUVIN 120, BASF Japan Ltd.) Manufactured) and the like.

  The heat ray absorbing function can be improved by adding or applying a heat ray absorbent exemplified below to one or more of the above-described layers. Examples of the heat ray absorbent include metal oxide ultrafine particles such as antimony-doped tin oxide (ATO) or tin-doped indium oxide (ITO) and phthalocyanine compounds.

  Next, the operation when the screen 100 is installed as shown in FIG. 1 will be described. FIG. 2 shows a schematic optical path example. Note that the optical path example is conceptually shown, and does not strictly represent the degree of refraction or reflection. The same applies hereinafter.

The image light L101 projected from the projector 10 (see FIG. 1) passes through the hard coat layer 119 and the adhesive layer 118 and reaches the light scattering portion 116 of the light scattering layer 114. The image light L101 that has reached the light scattering portion 116 is scattered and reflected by the light scattering portion 116. The direction of a part of the scattered and reflected light is changed to the projector 10 side, that is, the observer side. Then, the light is emitted from the screen 100 and provided as an image to the observer.
According to the screen 100, since the image light reaching the light scattering unit 116 is scattered and reflected without being absorbed and emitted to the observer, bright image light can be provided. That is, it is possible to efficiently reflect the image light from the projector 10 to the viewer side and emit it.

  On the other hand, the light that passes through the screen 100 and reaches the observer from the back side of the screen 100 is due to L102. That is, the light L102 from the back side passes through the screen 100 without reaching the light scattering portion 116 and is observed by the observer. Therefore, the light from the back side is observed through the surface on the base material layer 117 side of the light transmitting portion 115 which is a surface parallel to the surface of the base material layer 117 (the surface of the panel 111) and the surface on the opposite side. Provided to the user, the back side of the screen 100 can be clearly and brightly observed.

  Further, the external light L103 irradiated on the screen 100 from above the observer side passes through the light transmitting part 115 without passing through the hard coat layer 119 and the adhesive layer 118 and reaching the light scattering part 116, and then on the back side. Exit. Accordingly, the external light L103 does not reach the viewer side and does not affect the image light, so that the contrast can be improved.

The external light from the observer side is mostly electric light from the ceiling, sunlight from the window glass, and the like, and there are many components that irradiate the screen 100 obliquely from above. In the screen 100 the contrary, since the light scattering portion 116 has a first visual angle theta ₁ is increased relative to the second view angle theta _2, many of external light than conventional as external light L103 Can be transmitted to the back side.
Therefore, according to the screen 100, it is possible to effectively provide the image light to the observer side and transmit the external light to the back side so as not to affect the image light. This improves the contrast.
Furthermore, since the screen 100 does not have a portion that absorbs light as a means for improving contrast, it does not absorb image light or transmitted light from the back side, and provides bright image light and a bright back side view. It becomes possible to do.

  For example, such a screen 100 can be used for a conventional screen application such as replacing a screen used in an office or the like. In addition to this, if the screen 100 is applied to the glass of the store's show window where the inside of the store can be seen with glass, and an effective image is projected on the screen 100, both the image and the inside of the store can be seen. , Display effect can be improved.

  FIG. 7 is a view for explaining the layer structure of the screen 200 according to the first modification, and corresponds to FIG. In the screen 200, the position of the base material layer 117 is different from the stacked body 112 of the screen 100 in the stacked body 212. That is, in the screen 200, the base material layer 117 is disposed on the back side of the light scattering layer 114. Even in such a configuration, since the form of the light scattering layer 114 is the same as that of the screen 100, the same effect can be obtained.

In the screen 200, the light scattering layer 114 can be manufactured as follows. FIGS. 8A to 8C are diagrams illustrating one scene of a method for manufacturing the light scattering layer 114 in the screen 200. FIG.
That is, a mold having a groove capable of forming the uneven shape of the light scattering portion 116 is prepared, and as shown in FIG. 8A, the groove 125 is filled with the composition 125 to be the light scattering portion 116. The filling can be performed by supplying an excessive amount of the composition 125 to the mold and squeezing it with a blade. Then, as shown in FIG. 8A, the base material layer 117 is brought into contact with the mold, and the composition 125 is cured by an appropriate curing method, for example, by applying light from the direction indicated by the straight arrows.
When this is released, an intermediate sheet in which the light scattering portions 116 are arranged on the base material layer 117 as shown in FIG. 8B can be obtained.
Next, as shown in FIG. 8C, the light transmissive portion 115 is formed by supplying a composition that should become the light transmissive portion 115 from the side of the base material layer 117 where the light scattering portion 116 is disposed. .
Thereby, the light scattering layer 114 is formed.

FIG. 9 is a view for explaining the layer structure of the screen 300 according to the second modification, and corresponds to FIG. In the screen 300, the configuration of the light scattering portion 316 of the light scattering layer 314 is different from the light scattering portion 116 of the screen 100 in the stacked body 312. That is, as can be seen from FIG. 9, the screen 300 is configured such that the thickness of the light scattering portion 316 (the size in the left-right direction in FIG. 9) differs among the plurality of light scattering portions 316. More specifically, the size in the thickness direction increases from the light scattering portion 316 disposed at the lower portion in the vertical direction to the light scattering portion 316 disposed at the upper portion.
According to this, the thickness direction is small on the light scattering unit 316 side close to the projector 10 (see FIG. 1) disposed obliquely below the screen 300, and the thickness direction is large on the light scattering unit 316 side far from the projector 10. Therefore, it becomes possible to provide image light to the observer side more uniformly.

10A and 10B are diagrams for explaining a screen 400 according to a third modification. FIG. 10A is a front view of the screen 400, and FIG. 10B is a line indicated by Xb-Xb in FIG. It is thickness direction sectional drawing in alignment with.
As can be seen from FIG. 10B, the form of each layer at the center in the width direction of the screen 400 (the position of Xb-Xb in FIG. 10A) is the same as that of the screen 300. However, in the screen 400, as can be seen from FIG. 10A, the shape of the light transmitting portion 415 and the light scattering portion 416 extending in the longitudinal direction is different from the screen 300. That is, the light transmission part 415 and the light scattering part 416 extend in an arc shape when viewed from the front. The plurality of light transmission parts 415 and light scattering parts 416 are arranged concentrically.
Accordingly, the horizontal component of the image light can be deflected toward the viewer, particularly near both ends in the width direction of the screen 400, and the image light can be provided to the viewer with high uniformity even in the horizontal direction.

  11A and 11B are diagrams for explaining a screen 500 according to a fourth modified example. FIG. 11A is a front view of the screen 500, FIG. 11B is a cross-sectional view in the thickness direction in the vertical direction of the screen 500, and FIG. 11 (c) is a thickness direction sectional view of the screen 500 in the horizontal direction. 11B and 11C, the side on which the hard coat layer 119 is disposed is the observer side.

As can be seen from FIG. 11A, in the screen 500, in the light scattering layer 514, the light scattering portions 316 extending in the horizontal direction and the light scattering portions 516 extending in the vertical direction are arranged in a grid pattern. A light transmission part 515 is formed so as to be surrounded by the light scattering part 316 and the light scattering part 516.
Here, the light scattering portion 316 extending in the horizontal direction has the same form as the above-described screen 300 as can be seen from FIG.
On the other hand, the light scattering portion 516 extending in the vertical direction has a predetermined cross-sectional shape as can be seen from FIG. The cross-sectional shape of the light scattering portion 516 does not need to satisfy the relationship between the first and second prospective angles of the light scattering portion 116 of the screen 100 described above, but as shown in FIG. The shape is preferably capable of improving the uniformity of the image light in the direction.
Thereby, bright image light with high uniformity can be provided to the observer in both the vertical direction and the horizontal direction.
Here, as the material filled in the light scattering portion 516, the same material as the light scattering portion 116 described above can be applied.

  FIG. 12 is a diagram illustrating a layer configuration of a screen 600 according to the second embodiment, and corresponds to FIG. In the screen 600, the base material layer 117 is disposed on the back side of the light scattering layer 614 with respect to the screen 100, and the base in the triangular cross section of the light scattering portion 616 of the light scattering layer 614 is disposed on the viewer side. It is different in that. FIG. 13 shows an enlarged view of a part of the light scattering layer 614.

The screen 600 according to the present embodiment has the same angle of view relationship as that of the screen 100. Details are as follows. As shown in FIG. 13, the light transmission part 615 is arranged between the two light scattering parts 616 as described above, and lines corresponding to the diagonal lines of the light transmission part 615 are defined as indicated by XIIIa and XIIIb. can do. That is, for the opposite sides of the adjacent light scattering portions 616, the line XIIIa connecting the viewer side end of one side and the back side end of the other side, and the back side end of the one side and the other side Consider a line XIIIb connecting the end of the observer side.
Of the two lines XIIIa and XIIIb, the angle formed by the line XIIIa, which becomes higher as it goes toward the viewer, is smaller than 90 ° with respect to the normal of the screen 600, is defined as a first prospective angle θ ₃ . On the other hand, an angle formed by the line XIIIb, which is lower as it goes toward the viewer, is smaller than 90 ° with respect to the normal line of the screen 600, is defined as a second prospective angle θ ₄ .
In the present embodiment, θ ₃ > θ ₄ is satisfied. Thereby, a part of the external light from the observer side can be efficiently transmitted to the back side.
The materials constituting the light transmission part 615 and the light scattering part 616 are as described in the light transmission part 115 and the light scattering part 116 described above.

An example of an optical path by the screen 600 is as follows. This is shown in FIG.
The image light L601 projected from the projector 10 (see FIG. 1) passes through the hard coat layer 119 and the adhesive layer 118 and reaches the light scattering portion 616 of the light scattering layer 614. The image light L601 that has reached the light scattering portion 616 is scattered and reflected by the light scattering portion 616. The direction of a part of the scattered and reflected light is changed to the projector 10 side, that is, the observer side. Then, the light is emitted from the screen 600 and provided as an image to the observer.
According to the screen 600, since the image light reaching the light scattering unit 616 is scattered and reflected without being absorbed and emitted to the observer, bright image light can be provided. That is, it is possible to efficiently reflect the image light from the projector 10 to the viewer side and emit it.

  On the other hand, the light that passes through the screen 600 and reaches the observer from the back side of the screen 600 is due to L602. That is, the light L602 from the back side passes through the screen 600 and is observed by the observer without reaching the light scattering portion 616. Therefore, the light from the back side is observed through the surface on the base material layer 117 side of the light transmitting portion 615 that is a surface parallel to the surface of the base material layer 117 (the surface of the panel 111) and the surface on the opposite side. Therefore, the back side of the screen 600 can be observed clearly and brightly.

  Further, the external light L603 irradiated on the screen 600 from obliquely above on the viewer side passes through the light transmitting part 615 without passing through the hard coat layer 119 and the adhesive layer 118 and reaching the light scattering part 616, and then back. Exit to the side. Therefore, since the external light L603 does not reach the viewer side and does not affect the image light, the contrast can be improved.

The external light from the observer side is mostly electric light from the ceiling, sunlight from the window glass, and the like, and there are many components that irradiate the screen 600 obliquely from above. On the other hand, in the screen 600, since the first prospective angle θ ₃ is made larger than the second prospective angle θ ₄ in the light scattering portion 616, more external light than in the past is used like the external light L603. Can be transmitted to the back side.
Therefore, according to the screen 600, it is possible to effectively provide the image light to the observer side and transmit the external light to the back side so as not to affect the image light. This improves the contrast.
Furthermore, since the screen 600 is not provided with a portion that absorbs light as a means for improving the contrast, it does not absorb image light or transmitted light from the back side, and provides bright image light and a bright back side view. It becomes possible to do.

FIG. 14 shows a diagram for explaining a modification of the screen 600. FIG. 14 is an enlarged view of a part of the light scattering layer 614 ′ in the modification, and corresponds to FIG. 13. As can be seen from FIG. 14, in this modification, a blackened layer 616a is formed on the oblique side of the light scattering portion 616 ′.
The blackening layer 616a has a form in which at least two layers of a layer on the back side and a layer on the viewer side are laminated. The back side (left side in FIG. 14) is a black layer capable of absorbing light, and the front side (right side in FIG. 14) is a layer (aluminum, copper, silver, etc.) capable of reflecting light.

  According to this, external light from the back side like the optical path example L604 shown in FIG. 14 can be absorbed by the black layer capable of absorbing light of the blackening layer 616a, and the contrast can be improved. Is possible. Further, image light from the projector side such as the optical path example L605 shown in FIG. 14 is reflected by a layer capable of reflecting light and is emitted to the viewer side, so that a bright image can be provided.

[Transparent screen]
FIG. 15 is a perspective view of a screen 700 according to the third embodiment, which is shown together with the projector 20. The screen 700 of this embodiment is a permanent type (fixed transmission screen) among transmission screens. Accordingly, as can be seen from FIG. 15, the screen 700 has the viewer side indicated by A as the front side, and the projector 20 is installed on the back side, which is the opposite side.

  FIG. 16 shows a section of the screen 700 in the vertical direction along the line indicated by XVI-XVI in FIG. 15 in the posture in which the screen 700 is installed (the posture in which the screen surface is set up vertically), and its layer structure is schematically shown. FIG.

The screen 700 includes a panel 111 and a laminated body 712 bonded to the panel 111 from the back side. And the laminated body 712 is equipped with the contact bonding layer 113, the light-scattering layer 714, the base material layer 117, the contact bonding layer 118, and the hard-coat layer 119 from the back side.
Accordingly, the screen 700 is different in that a light scattering layer 714 is applied instead of the light scattering layer 114 of the screen 100 described above. More specifically, the difference is that a light scattering portion 716 is applied instead of the light scattering portion 116 of the light scattering layer 114 of the screen 100. Therefore, the light scattering unit 716 will be described here.

The light scattering unit 716 is configured to be able to transmit the light irradiated here while scattering the light. Therefore, the light scattering portion 716 is filled with a material for scattering while transmitting light. Although the material for that is not specifically limited, As an example of material, the material which mixed the transparent binder resin and the transparent scattering agent from which this binder resin differs in refractive index is preferable. As the transparent binder resin, the same resin as the light transmitting portion 115 can be used.
On the other hand, examples of the transparent scattering agent include cross-linked particles obtained by polymerizing monomers mainly composed of (meth) acrylic acid ester and styrene. Specific examples of the crosslinked particles include Gantz Pearl (registered trademark) manufactured by Gantz Kasei Co., Ltd. The cross-linked particles can be controlled in refractive index by changing the mixing ratio of acrylic acid ester and styrene. For example, the refractive index can be made about 1.49 by increasing the acrylic ratio, and the refractive index can be made about 1.59 by increasing the styrene ratio. Further, urethane cross-linked particles can be used as the scattering agent. Specific examples of the urethane cross-linked particles include Art Pearl (registered trademark) manufactured by Negami Kogyo Co., Ltd. The scattering agent can also be hollow particles. Thereby, light can be efficiently transmitted and scattered.
Note that the refractive index of the light scattering portion 716 (the refractive index of the binder resin) is preferably the same as the refractive index of the light transmitting portion 115. Thereby, refraction at the interface between the light transmitting portion 115 and the light scattering portion 716 and wavelength dispersion due to this can be prevented, and generation of rainbow-like unevenness (pattern) observed on the screen can be suppressed.
Other configurations of the light scattering unit 716 are the same as those of the light scattering unit 116.

  As for the method for manufacturing the screen 700, a method similar to that for the screen 100 can be applied only by changing the material to be filled in the light scattering portion 716 to the above-described one.

  Next, the operation when the screen 700 is installed as shown in FIG. 15 will be described. FIG. 16 shows a schematic optical path example.

  Video light L701 projected from the projector 20 (see FIG. 15) passes through the panel 111 and the adhesive layer 113, and reaches the light scattering portion 716 of the light scattering layer 714. The image light L701 that has reached the light scattering portion 716 is transmitted and scattered by the action of the light scattering portion 716. The scattered light exits from the screen 700 and is provided as an image to the observer.

  As described above, according to the screen 700, it is possible to efficiently provide an image to an observer.

  The light that passes through the screen 700 and reaches the observer from the back side of the screen 700 is due to L702. That is, the light L 702 from the back side passes through the screen 700 without reaching the light scattering portion 716 and is observed by the observer. Therefore, the light from the back side is observed through the surface on the base material layer 117 side of the light transmitting portion 115 which is a surface parallel to the surface of the base material layer 117 (the surface of the panel 111) and the surface on the opposite side. The back side of the screen 700 can be observed clearly and brightly.

  Further, the external light L 703 irradiated to the screen 700 from obliquely above on the viewer side passes through the hard coat layer 119 and the adhesive layer 118, passes through the light transmitting portion 115 without reaching the light scattering portion 716, and then back. Exit to the side. Accordingly, the external light L703 does not reach the observer side and does not affect the image light, so that the contrast can be improved.

The outside light from the observer side is mostly electric light from the ceiling, sunlight from the window glass, and the like, and there are many components irradiated on the screen 700 from obliquely above. On the other hand, since the prospective angle is formed in the light scattering portion 716 in the same manner as the screen 100 in the screen 700, more external light can be transmitted to the back side than in the conventional case like the external light L703.
Therefore, according to the screen 700, it is possible to effectively provide the image light to the observer side and transmit the external light to the back side so as not to affect the image light. This improves the contrast.
Further, since the screen 700 is not provided with a portion that absorbs light as a means for improving contrast, it does not absorb image light or transmitted light from the back side, and provides bright image light and a bright back side view. It becomes possible to do.

  Similarly to the screen 700, the screens 200 to 600 described above can be formed into a transmissive screen by changing the material used for the light scattering portion.

  In addition, although the fixed type screen has been described above, a roll type screen that can be wound and unfolded can be obtained by applying a flexible protective layer instead of the panel 111. The protective layer can be made of the same material as the base material layer 117.

In Example 1, a laminate comprising a base material layer provided on the screen of the example shown in FIG. 2 and a light scattering layer laminated thereon was produced and evaluated. FIG. 17 shows the shape of the light scattering layer produced in Example 1. That is, as follows.
・ Pitch of light transmitting part (light scattering part): 185 μm
-The size of the back side of the cross section of the light transmission part: 117 μm
-Size between observer side of adjacent light scattering portions in cross section of light transmitting portion: 181 μm
The size of the bottom of the triangular cross section of the light scattering portion: 68 μm (however, the size of the triangular cross section is slightly at the apex but 4 μm).
・ Thickness direction of light scattering part: 150 μm
・ An angle formed by the screen normal of the side that is the ground side of the triangular cross section of the light scattering portion: 20 °
・ An angle between the screen normal of the side that becomes the top side of the triangular section of the light scattering part: 0 °
-Θ ₁ calculated from the above: 50.4 °
-Θ ₂ calculated from the above: 38.0 °

Such a light scattering layer was produced as follows.
A polyester film (Cosmo Shine (registered trademark) A4300, thickness 100 μm, manufactured by Toyobo Co., Ltd.) was prepared as a base material layer, and a light transmitting portion was formed on one surface side of the base material layer as described above. . That is, after applying a photocurable resin composition (refractive index 1.55) to a base material layer and shaping with a predetermined mold, the photocurable resin composition is cured by irradiating with ultraviolet rays. The mold was released to form a light transmission part.
Next, between the light transmission parts, the light scattering part is formed as described above using the composition for forming the light scattering part (20 parts by mass of titanium oxide is mixed in a binder having a refractive index of 1.55). Formed. That is, the above composition for constituting the light scattering portion is excessively supplied to the concave portion formed between the light transmitting portions, the squeegee is removed by scraping with a blade, and the composition is removed in the concave portion. The light scattering portion was formed by filling and curing the composition filled in the recesses by irradiating with ultraviolet rays.

On the other hand, in Comparative Example 1, a light scattering layer having a light scattering portion having a rectangular cross section was produced as shown in FIG. That is, as follows.
・ Pitch of light transmitting part (light scattering part): 185 μm
・ Vertical size of light transmission part: 117μm
・ Vertical size of light scattering part: 68μm
-Angle formed by the screen normal of the ground side of the cross section of the light scattering part: 0 °
・ An angle formed with the screen normal of the side on the top side of the cross section of the light scattering portion: 0 °
・ Thickness direction of light scattering part: 150 μm
Calculated from the above θ ₁ = θ ₂ : 38.0 °

  “Front gain” and “transparency” of the laminate (light scattering layer) produced in Example 1 and Comparative Example 1 were evaluated. The magnitude of the front gain serves as an index for observing bright video light, and a large value means that bright video light can be observed. Further, the transparency is an index for evaluating the visibility of the back side of the screen, and the back side can be clearly visually recognized by being excellent in transparency. Furthermore, the contrast can also be evaluated by evaluating the front gain and transparency. For example, the contrast is improved by high front gain and high transparency. On the other hand, if the transparency is low even if the front gain is high, it means that the so-called diffuse reflection of the external light is large, and the influence on the image light is increased and the contrast is lowered.

The front gain was evaluated as follows. FIG. 19 schematically shows apparatus settings for evaluation. White light was projected on the above-mentioned laminate in which the screen surface was installed vertically by a light source (Metal Halide Fiber Light Source, IMH-250, Sigma Kogyo Co., Ltd.) from 45 ° below the observer side.
First, an illuminance meter (T-1H, Konica Minolta Optics, Inc.) was installed on the surface of the laminate, and the illuminance of light irradiated on the laminate was measured.
Next, the illuminance meter was removed, and a luminance meter (LS-110, Konica Minolta Optics Co., Ltd.) was installed in front of the position separated from the laminate by a predetermined distance, and luminance (front luminance) was measured.
The front gain was calculated by “π · front luminance / illuminance”.

  On the other hand, the transparency was evaluated by visual observation, and Example 1 and Comparative Example 1 were relatively compared.

  Further, the contrast was comprehensively evaluated by the results of the front gain and the transparency, and visually.

  Table 1 shows the results. The front gain is evaluated by visual observation together with the value, and when considering practical use as a screen, it is “◯” if it is good, but it is not good but “△” if practical, it cannot be put into practical use. If it was a grade, it evaluated by "x".

  As can be seen from Table 1, the light scattering layer provided in Example 1 was superior to the light scattering layer provided in Comparative Example 1 in both front gain and transparency, and as a result, the contrast was also good.

DESCRIPTION OF SYMBOLS 10 Projector 20 Projector 100 Screen 111 Panel 112 Laminated body 113 Adhesive layer 114 Light scattering layer 115 Light transmission part 116 Light scattering part 117 Base material layer 118 Adhesion layer 119 Hard coat layer 200 Screen 300 Screen 314 Light scattering layer 316 Light scattering part 400 Screen 414 Light scattering layer 415 Light transmission part 416 Light scattering part 500 Screen 514 Light scattering layer 515 Light transmission part 516 Light scattering part 600 Screen 614 Light scattering layer 615 Light transmission part 616 Light scattering part 700 Screen 714 Light scattering layer 716 Light scattering Part

Claims (11)

A screen that displays the image light projected from the projector so as to be visible to an observer,
A sheet-like base material layer having translucency;
A light scattering layer formed on one surface of the base material layer for scattering light, and
The light scattering layer is
A plurality of light emitters arranged side by side along one surface of the base material layer and transmitting light;
A light scattering portion that is disposed between the plurality of light transmission portions and scatters light,
Visual angle of the light scattering layer, angle a upwardly toward the observer side in a posture in which the vertical of the screen, greater than angle a downward toward the viewer side no longer,
With the screen in a vertical position,
While passing a part of the light from the side opposite to the observer across the screen without reaching the light scattering portion,
A screen in which a part of light incident on the light scattering layer from an oblique upper side on the viewer side passes through the screen without reaching the light scattering portion .   The screen according to claim 1, wherein the light scattering portion contains a white or silver pigment and scatters light by scattering reflection.   The screen according to claim 2, wherein the pigment has conductivity.   The light scattering portion is filled with a transparent resin and a particulate light scattering agent having a refractive index different from that of the transparent resin, and the light is scattered by being transmitted through the light scattering portion. Item 4. The screen according to Item 1.   The screen according to any one of claims 1 to 4, wherein the light transmission part and the light scattering part have a predetermined cross section and extend in a horizontal direction in a posture in which the screen is arranged vertically.   The screen according to claim 1, wherein the light transmission part and the light scattering part have a predetermined cross section and extend in an arc shape.   The screen according to claim 1, wherein the light scattering portion is formed in a lattice shape.   The screen according to claim 1, wherein a blackening layer is formed at an interface between the light transmission part and the light scattering part.   The screen according to claim 1, wherein the light transmission part transmits light without scattering light. A method for producing the screen according to claim 1,
To the intermediate sheet in which the light transmission portions are formed at predetermined intervals on the base material layer, the composition to be the light scattering portion is excessively supplied, and the composition is scraped off with a blade. A method for manufacturing a screen, comprising a step of filling the space between the light transmitting portions. A method for producing the screen according to claim 1,
A step of supplying an excessive amount of the composition to be the light scattering portion to a mold having a groove corresponding to the uneven shape of the light scattering portion, scraping the composition with a blade, and filling the groove with the composition; ,
Producing the intermediate sheet in which the base material layer is brought into contact with the mold to cure the composition to form the light scattering portion on the base material layer;
Supplying a composition to be the light transmission part to the intermediate sheet to form the light transmission part.

Images