JP2014092761A - Screen and method for manufacturing the screen - Google Patents

Abstract

A screen capable of suppressing the occurrence of rainbow-like color unevenness and a method for manufacturing the screen are provided.
A light-transmitting sheet-like base material layer and a light scattering layer that scatters light formed on one surface of the base material layer, the light scattering layer on the base material layer. A plurality of light transmitting portions that transmit light and a light scattering portion that scatters light disposed between the plurality of light transmitting portions, and are parallel to the parallel direction of the plurality of light transmitting portions. In the cross section in the thickness direction, the screen has a curved or broken line interface between the light transmitting portion and the light scattering portion, and a method of manufacturing the screen.
[Selection] Figure 2

Description

  The present invention relates to a screen that displays image light projected from a projector so as to be visible, and a method of 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 transmissive screen, the surface is provided with irregularities or a light scattering layer for the purpose of widening the viewing angle of image light, etc., and light transmission is possible, but the back surface You cannot observe the side.

  In Patent Document 1, a large number of unit shapes arranged in a one-dimensional or two-dimensional direction along the screen surface, and a unit shape capable of transmitting light, a light absorbing unit that is formed between the unit shapes and absorbs light, A reflection / transmission layer that is provided at least on the back side of the unit shape, reflects the image light that has passed through the unit shape, and can transmit light from the back side opposite to the projection side on which the image light is projected Are disclosed. Further, Patent Document 2 discloses a base material layer that is capable of transmitting light and formed in a substantially parallel plate shape, and protrudes along the screen surface to the back surface side opposite to the image source side of the base material layer. A plurality of unit shapes arranged in a one-dimensional or two-dimensional direction and capable of transmitting light, and a reflection layer provided on the top of the back side of the unit shape and reflecting image light that has passed through the unit shape. The shapes are arranged with a gap, and between the unit shapes are arranged, a background transmission portion is provided in which a base layer or a plane parallel to the base layer is exposed. A transflective reflective screen is disclosed. According to these screens, it is possible to observe the background on the back side from the front while allowing the image light from the front to be reflected by the reflecting surface and observable.

JP 2006-243893 A JP 2006-337944 A

  However, in the conventional screens disclosed in Patent Document 1 and Patent Document 2, when light is transmitted from the back side to the front side, rainbow-like color unevenness may occur on the screen.

  In view of the above problems, an object of the present invention is to provide a screen capable of suppressing the occurrence of rainbow-like color unevenness and a method for manufacturing the screen.

  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 in parallel on the base material layer and disposed between the light-transmitting portions that transmit light and the plurality of light-transmitting portions. In addition, in the thickness direction cross section parallel to the parallel direction of the plurality of light transmission parts, the interface between the light transmission part and the light scattering part is a curve or a polygonal line. It is a screen.

  According to a second aspect of the present invention, in the screen according to the first aspect, the parallel pitch of the light scattering portions is 100 μm or more.

  In the present invention, the “parallel pitch of the light scattering portions” refers to the one end portion of one light scattering portion when viewed from one side in the parallel direction of the light scattering portion in a plan view of the light scattering layer, This means the distance between one light scattering portion and the other end of the other light scattering portion (see p in FIG. 3 and P1 to P6 in FIG. 5).

  According to a third aspect of the present invention, in the screen according to the first or second aspect, the light scattering layer has light scattering portions having different parallel pitches.

  “Parallel pitch is different” means that the parallel pitch of one light scattering part and the adjacent light scattering part is different from the parallel pitch of the other light scattering part and the adjacent light scattering part. (Refer to P1 to P6 in FIG. 5).

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

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

  Invention of Claim 6 is the screen in any one of Claims 1-3, The light-scattering part is transparent resin, The particulate-form light-scattering agent from which this transparent resin differs in refractive index, The light is scattered by being transmitted through the light scattering portion.

  The invention according to claim 7 is the screen according to any one of claims 1 to 6, wherein the light transmitting portion and the light scattering portion have a predetermined cross section in a posture in which the screen is arranged vertically, and are in a horizontal direction. Extend to.

  The invention according to claim 8 is the screen according to any one of claims 1 to 6, wherein 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 9 is the screen according to any one of claims 1 to 6, wherein the light scattering portions are formed in a lattice shape.

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

  According to the eleventh aspect of the present invention, in the screen according to any one of the first to tenth aspects, the light transmitting portion transmits the light without scattering.

  In the present invention, “transmits without scattering light” means that it is formed without intentionally adding a material that scatters light, and inevitably has a slight amount of light when it is transmitted. Scattering is allowed to occur.

  A twelfth aspect of the present invention is a method for manufacturing the screen according to any one of the first to eleventh aspects, wherein light is transmitted to an intermediate sheet in which light transmitting portions are formed at predetermined intervals on a base material layer. A method for producing 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 13 is a method for producing the screen according to any one of claims 1 to 11, and should be a light scattering portion in a mold having a groove corresponding to the uneven shape of the light scattering portion. Supplying an excessive amount of the composition, scraping the composition with a blade and filling the groove with the composition, bringing the base material layer into contact with a mold to cure the composition, and lighting the base material layer A method for producing a screen, comprising: a step of producing an intermediate sheet having a scattering portion; and a step of supplying a composition to be a light transmission portion to the intermediate sheet to form a light transmission portion.

  ADVANTAGE OF THE INVENTION According to this invention, the screen which can suppress generation | occurrence | production of a rainbow-like color nonuniformity, and the manufacturing method of this screen can be provided.

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. FIG. 4A is an enlarged view of the light scattering layer 114a. FIG. 4B is an enlarged view of the light scattering layer 114b. It is sectional drawing of the light-scattering layer 114c. 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 expanded and showed the light-scattering layer 114 '. 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. It is a figure explaining the form of the screen. It is a figure explaining the form of the screen. It is a perspective view explaining the screen 500. FIG. It is the figure which showed the cross section of the screen 500, and represented the layer structure typically. It is the figure which showed the cross section of the screen 600, and represented the layer structure typically. 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 expanded and showed the light-scattering layer 114c.

  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 the screen 100 and is shown together with the projector 10. The screen 100 of this embodiment is a permanent type (fixed type reflective screen) among reflective screens. Therefore, as can be seen from FIG. 1, the screen 100 has the front side of the observer represented by A, the projector 10 is installed on the front side, and the opposite side (side where the rear side object B exists) is the back side. Become.

  FIG. 2 shows a cross section in the thickness direction 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 which represented the layer structure 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 equipped with the contact bonding layer 113, the base material layer 117, the light-scattering layer 114, 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. As a material used for the adhesive layer 113, various materials that can achieve the above-described purpose and have translucency can be used. Examples thereof include known pressure-sensitive adhesives, adhesives, ultraviolet curable resins, ionizing radiation curable resins, photocurable resins, and thermosetting resins. 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. However, the material constituting the adhesive layer 113 is preferably excellent in weather resistance in addition to translucency in terms of the properties of the screen 100. Moreover, it is preferable to contain ultraviolet absorbers, such as benzotriazole, in order to prevent deterioration by ultraviolet rays.

  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.

  Next, 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 described in detail later. Therefore, the base material layer 117 has a light transmitting property and supports the light scattering layer 114 so as to prevent deformation. From this point of view, as a specific example of the material constituting the base material layer 117, for example, one or more of acrylic, styrene, polycarbonate, polyethylene terephthalate, acrylonitrile and the like are the main component (50% by mass or more, the same applies hereinafter). Transparent resin, epoxy acrylate or urethane acrylate-based reactive resin (ionizing radiation curable resin, etc.).

  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 114 may be the same as or different from the refractive index of the light transmitting portion 115 of the light scattering layer 114 described later. 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.

  Next, the light scattering layer 114 will be described. 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 unit 115 transmits light without scattering. Note that “transmit light without scattering” means a portion formed without intentionally adding light and a material that scatters light, and is unavoidable when light passes through the material. It is permissible for the scattering 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 in a recess (groove) between two adjacent light transmission parts 115. The light scattering portion 116 is formed by filling the concave portions (grooves) between the light transmitting portions 115 with the material constituting the light scattering portion 116. Therefore, the light scattering portion 116 also has a cross section based on the concave portion.

  The light scattering portion 116 is a portion configured to scatter and reflect the light irradiated here. Therefore, the light scattering portion 116 is filled with a material for scattering and reflecting light. The material for scattering and reflecting light is not particularly limited, and examples thereof include curable resins and pressure-sensitive adhesives mixed with light scattering agents such as white pigments and silver pigments. 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, as the curable resin, the same material as that constituting the light transmitting portion 115 can be used.

  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.

  Note that the refractive index of the light scattering portion 116 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.

  The light scattering portion 116 can also be made of a conductive material. According to this, it becomes possible to configure as a so-called touch panel, and it is possible to add the function. 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 FIGS.

  In the cross section shown in FIGS. 2 and 3 (sheet thickness direction cross section parallel to the parallel direction of the light transmitting portion 115), the interface between the light transmitting portion 115 and the light scattering portion 116 is a polygonal line. However, the present invention is not limited to such a configuration, and the interface between the light transmission part and the light scattering part may be a curved line or a polygonal line in the cross section in the thickness direction. That is, the form illustrated in FIGS. 4A and 4B may be used. FIG. 4A is an enlarged view of a part of the light scattering layer 114a according to the modification of the light scattering layer 114, and corresponds to FIG. The light scattering layer 114a includes a light scattering portion 116a in which an interface with the light transmission portion 115 is formed in a stepped shape. On the other hand, FIG. 4B is an enlarged view of a part of the light scattering layer 114b according to the modification of the light scattering layer 114, and corresponds to FIG. The light scattering layer 114b includes a light scattering portion 116b formed in a curved shape in which the interface with the light transmission portion 115 is convex inside the light scattering layer 114b.

  The present inventor has found that the cause of the occurrence of rainbow-like color unevenness on the screen (surface) of the screen when light is transmitted from the back side of the screen is a diffraction phenomenon. As described above, the occurrence of rainbow-like color unevenness due to diffraction phenomenon can be suppressed by making the interface between the light transmission part and the light scattering part into a curved line or a polygonal line in the cross section in the thickness direction.

  From the viewpoint of facilitating the scattering and reflection of light at the light scattering portion, the interface between the light scattering portion and the light transmitting portion may be a mat surface that is a surface on which numerous minute irregularities are formed.

  The parallel pitch of the light scattering portions 116 is not particularly limited, but is preferably 20 μm or more and 200 μm or less. If the parallel pitch of the light scattering portions 116 is too narrow, the processing becomes difficult because the shape becomes fine. On the other hand, if the parallel pitch of the light scattering portions 116 is too wide, the releasability of the material tends to decrease when molding with a mold. However, from the viewpoint of suppressing the occurrence of rainbow-like color unevenness due to the diffraction phenomenon described above, the parallel pitch of the light scattering portions 116 is preferably 100 μm or more. Increasing the parallel pitch of the light scattering portions 116 can also suppress the occurrence of rainbow-like color unevenness due to the diffraction phenomenon described above. Moreover, it is preferable that the space | interval of light scattering parts is random from a viewpoint of making it easier to suppress generation | occurrence | production of the said rainbow-shaped color nonuniformity. The interval between the light scattering portions 116 being random means that intervals having different widths are included in the plurality of intervals formed by the plurality of adjacent light scattering portions 116. FIG. 5 is a view showing a light scattering layer 114 c according to a modification of the light scattering layer 114. The light scattering layer 114 c is the same as the light scattering layer 114 except that the parallel pitch of the light scattering portions 116 c is different from the parallel pitch of the light scattering portions 116. In the form illustrated in FIG. 5, the sizes of the parallel pitches P1 to P6 of the light scattering portions 116c are all different. In this way, by making the interval between the light scattering portions random, it becomes easier to suppress the occurrence of rainbow-like color unevenness due to the diffraction phenomenon described above.

  Of the cross section of the light scattering portion 116, the width on the side opposite to the base material layer 117 (in this embodiment, the viewer 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 adhesive layer 118 will be described. 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. As a material used for the adhesive layer 118, various materials that can achieve the above-described purpose and have translucency can be used. Examples thereof include known pressure-sensitive adhesives, adhesives, ultraviolet curable resins, ionizing radiation curable resins, photocurable resins, and thermosetting resins. 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. However, the material constituting the adhesive layer 118 is preferably excellent in weather resistance in addition to translucency in terms of the properties of the screen 100. Moreover, it is preferable to contain ultraviolet absorbers, such as benzotriazole, in order to prevent deterioration by ultraviolet rays.

  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.

  As a material constituting the hard coat layer 119, for example, 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. Examples of 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 ( Examples include (meth) acrylate oligomers such as (meth) acrylate, epoxy (meth) acrylate, and polyester (meth) acrylate, and (meth) acrylate 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 above-described configuration can be manufactured as follows, for example.

  The screen 100 can be manufactured by bonding the laminate 112 to the panel 111. 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, the adhesive layer 113 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 113 opposite to the substrate so that the adhesive layer 113 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 113 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 116, 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 opposite side of the light scattering layer 114 from the base material layer 117 with an adhesive layer 118 interposed therebetween. 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.

  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.

  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.

  Next, a modified example will be described. FIG. 7 is a diagram for explaining a modification of the screen 100. FIG. 7 is an enlarged view of a part of the light scattering layer 114 ′ in the modification, and corresponds to FIG. 3. As can be seen from FIG. 7, in this modification, a blackened layer 116x, which is a black layer, is formed on the back side of the light scattering portion 116 '.

  According to this, the external light from the back side as in the optical path example L104 shown in FIG. 7 can be absorbed by the blackened layer 116x, so that the contrast is improved when displaying an image on the screen. be able to. In the case of this example, since most of the image light is scattered and reflected before reaching the blackened layer 116x, the amount of image light absorbed is small.

  The blackening layer 116x may be made of a black material that can absorb external light. Further, a layer containing a metal (for example, copper, aluminum, silver, or the like) may be formed between the blackened layer 116x and the light scattering portion 116 '. The image light can be reflected to the viewer side by the layer containing the metal.

  Next, another modification will be described. FIG. 8 is a diagram for explaining a layer structure of a screen 200 according to a 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 viewer 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. 9A to 9C are diagrams illustrating a 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. 9A, 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. 9A, 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. 9B can be obtained.

  Next, as illustrated in FIG. 9C, the light transmissive portion 115 is formed by supplying the 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.

  Next, another modification will be described. 10A and 10B are diagrams for explaining the layer structure of the screen 300 according to the modification. FIG. 10A is a front view of the screen 300, 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 300 (the position of Xb-Xb in FIG. 10A) is the same as that of the screen 100. However, in the screen 300, as can be seen from FIG. 10A, the shape of the light transmission layer 315 and the light scattering portion 316 of the light scattering layer 314 extending in the longitudinal direction is different from that of the light scattering layer 114 of the screen 100. That is, the light transmission part 315 and the light scattering part 316 extend in an arc shape when viewed from the front. The plurality of light transmission parts 315 and light scattering parts 316 are arranged concentrically.

  Next, another modification will be described. 11A and 11B are diagrams for explaining a screen 400 according to a modification. FIG. 11A is a front view of the screen 400, FIG. 11B is a sectional view in the thickness direction in the vertical direction of the screen 400, and FIG. ) Is a thickness direction cross-sectional view of the screen 400 in the horizontal direction. In both FIG. 11B and FIG. 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 400, in the light scattering layer 414, the light scattering portions 316 extending in the horizontal direction and the light scattering portions 416 extending in the vertical direction are arranged in a grid pattern. A light transmission part 415 is formed so as to be surrounded by the light scattering part 316 and the light scattering part 416.

  Here, the light scattering portion 316 extending in the horizontal direction has the same form as the light scattering portion 116 of the screen 100 described above as can be seen from FIG. On the other hand, the light scattering portion 416 extending in the vertical direction has the same form as the light scattering portion 116 of the screen 100 except that the parallel direction is different, as can be seen from FIG. Note that the same material as that of the light scattering portion 116 described above can be applied to the material filled in the light scattering portion 416.

[Transparent screen]
FIG. 12 is a perspective view of the screen 500 and is shown together with the projector 20. The screen 500 of the present embodiment is a permanent type of a transmissive screen (fixed transmissive screen). Therefore, as can be seen from FIG. 12, the screen 500 has the observer side represented by A as the front side, and the projector 20 is installed on the back side (the side where the back side object B exists) opposite to this.

  FIG. 13 shows a cross section of the screen 500 in the vertical direction along the line indicated by XII-XII in FIG. 12 in the posture in which the screen 500 is installed (the posture in which the screen surface is set up vertically), and its layer structure is schematically shown. FIG.

  The screen 500 includes a panel 111 and a laminated body 512 bonded to the panel 111 from the back side. And the laminated body 512 is equipped with the contact bonding layer 113, the base material layer 117, the light-scattering layer 514, the contact bonding layer 118, and the hard-coat layer 119 from the back side.

  Accordingly, the screen 500 is different in that the light scattering layer 514 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 516 is applied instead of the light scattering portion 116 of the light scattering layer 114 of the screen 100. Therefore, here, the light scattering portion 516 will be described.

  The light scattering unit 516 is configured to be able to transmit the light irradiated here while scattering the light. Therefore, the light scattering portion 516 is filled with a material for scattering while transmitting light.

  As the material that scatters while transmitting light in the light scattering portion 516, for example, 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 is preferable. As the transparent binder resin, a curable resin or an adhesive can be used as in the light scattering portion 116.

  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 516 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 516 and wavelength dispersion due to this can be prevented, and the occurrence of rainbow-like unevenness (pattern) observed on the screen can be suppressed.
Other configurations of the light scattering unit 516 are the same as those of the light scattering unit 116.

  As for the manufacturing method of the screen 500, a method similar to that of the screen 100 can be applied only by changing the material to be filled in the light scattering portion 516 to the above.

  Next, the operation when the screen 500 is installed as shown in FIG. 12 will be described. FIG. 13 shows a schematic optical path example.

  Video light L501 projected from the projector 20 (see FIG. 12) passes through the panel 111, the adhesive layer 113, and the base material layer 117, and reaches the light scattering portion 516 of the light scattering layer 514. The image light L501 that has reached the light scattering portion 516 is transmitted and scattered by the action of the light scattering 516. Then, the scattered light is emitted from the screen 500 and provided as an image to the observer. As described above, according to the screen 500, it is possible to efficiently provide an image to an observer.

  Light that passes through the screen 500 and reaches the observer from the back side of the screen 500 is due to L502. That is, the light L502 from the back side passes through the screen 500 without reaching the light scattering portion 516 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. Therefore, the back side of the screen 500 can be observed clearly and brightly.

FIG. 14 is a diagram for explaining the layer structure of a screen 600 according to a modification, and corresponds to FIG. In the screen 600, the configuration of the light scattering portion 616 of the light scattering layer 614 in the stacked body 612 is different from that of the light scattering portion 516 of the screen 500. In other words, as can be seen from FIG. 14, the screen 600 is configured such that the thickness of the light scattering portion 616 (the size in the left-right direction in FIG. 14) differs among the plurality of light scattering portions 616. More specifically, the size in the thickness direction increases from the light scattering portion 616 disposed at the lower portion in the vertical direction to the light scattering portion 616 disposed at the upper portion.
According to this, since the thickness direction is small on the light scattering unit 616 side close to the projector 20 (see FIG. 12) disposed below the screen 600 and the thickness direction is large on the light scattering unit 616 side far from the projector 20. Thus, it becomes possible to provide the image light more uniformly to the observer side.

  15A and 15B are diagrams for explaining a screen 700 according to another modification. FIG. 15A is a front view of the screen 700, and FIG. 15B is a line indicated by XVb-XVb in FIG. It is thickness direction sectional drawing along.

As can be seen from FIG. 15B, the form of each layer in the center of the screen 700 in the width direction (the position of XVb-XVb in FIG. 15A) is the same as that of the screen 600. However, the screen 700 is different from the screen 600 in the form of the light transmitting portion 715 and the light scattering portion 716 extending in the longitudinal direction, as can be seen from FIG. That is, the light transmission part 715 and the light scattering part 716 extend in an arc shape when viewed from the front. The plurality of light transmission parts 715 and light scattering parts 716 are arranged concentrically.
Thereby, the horizontal component of the image light can be deflected toward the viewer, particularly in the vicinity of both ends in the width direction of the screen 700, and the image light can be provided to the viewer with high uniformity even in the horizontal direction.

  16A and 16B are diagrams for explaining a screen 800 according to still another modified example. FIG. 16A is a front view of the screen 800, FIG. 16B is a sectional view in the thickness direction in the vertical direction of the screen 800, and FIG. 16 (c) is a thickness direction cross-sectional view of the screen 800 in the horizontal direction. In both FIG. 16B and FIG. 16C, the side on which the hard coat layer 119 is disposed is the observer side.

As can be seen from FIG. 16A, in the screen 800, in the light scattering layer 814, the light scattering portions 616 extending in the horizontal direction and the light scattering portions 816 extending in the vertical direction are arranged in a grid pattern. A light transmission part 815 is formed so as to be surrounded by the light scattering part 616 and the light scattering part 816.
Here, the light scattering portion 616 extending in the horizontal direction has the same form as the screen 600 described above, as can be seen from FIG.
On the other hand, the light scattering portion 816 extending in the vertical direction is configured to have a predetermined cross-sectional shape as can be seen from FIG. The cross-sectional shape of the light scattering portion 816 is preferably a shape that can improve the uniformity of the image light in the horizontal direction of the screen 800 as shown in FIG.
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 816, the same material as that of the above-described light scattering portion 516 can be applied.

  Similarly to the light scattering layer 114 ′, the screens 500, 600, 700, and 800 described above are also formed with a blackened layer, which is a black layer, on the back side of the light scattering portion. External light can be absorbed by the blackened layer, and the contrast can be improved.

  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.

  Further, in the description of the present invention so far, in the light scattering layer in the form of forming the light scattering portion after forming the light transmitting portion as illustrated in FIG. 6, the light scattering portion on the side opposite to the base material layer is formed. Although the embodiment in which the surface (the surface on the opening side of the groove between the light transmitting portions) is smooth has been described as an example, the present invention is not limited to this embodiment. For example, as illustrated in FIG. 17, a configuration in which the concave portion 116 e is formed on the surface of the light scattering portion 116 d opposite to the base material layer 117 may be employed. FIG. 17 is an enlarged view of a part of the light scattering layer 114c according to the modification of the light scattering layer 114, and corresponds to FIG. The concave portion 116e is filled with the composition constituting the light scattering portion 116d in the concave portion between the light transmitting portions 115 by the method illustrated in FIG. 6 and the excess amount of the composition is scraped off with a blade. Formed when the composition cures and shrinks. The depth (size in the sheet thickness direction) of the concave portion 116e is determined by filling the concave portion between the light transmitting portions 115 with the composition constituting the light scattering portion 116d by the method illustrated in FIG. When scraping off an object with a blade, it can be formed by adjusting the magnitude of the force with which the blade is pressed against the light transmitting portion 115 side. That is, the concave portion 116e can be formed deeper as the force for pressing the blade toward the light transmitting portion 115 is increased. When the recess 116e is formed in this way, light can be scattered even at the interface of the recess 116e.

  Hereinafter, the present invention will be described based on examples and comparative examples. However, the present invention is not limited to the embodiments.

Example 1
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 light transmission part was formed by releasing from the mold. Next, a light scattering portion is formed between the light transmitting portions as described above using a composition for forming the light scattering portion (20 parts of titanium oxide is mixed in a binder having a refractive index of 1.55). did. 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. Thus, an optical sheet having a base material layer and a light scattering layer formed on one surface side of the base material layer was produced. In addition, the pitch of the light transmission part in the optical sheet (see p in FIG. 3) is 150 μm, the width on the front side of the light transmission part (see w1 in FIG. 3) is 75 μm, and the width on the front side of the light scattering part (see FIG. 3). ) Is 75 μm, the back side width of the light transmission part (see w3 in FIG. 3) is 145 μm, the back side width of the light scattering part (see w4 in FIG. 3) is 5 μm, and the thickness of the light scattering part (see w3 in FIG. 3). (See t in FIG. 3) was set to 200 μm. Further, the cross-sectional shape of the interface between the light scattering portion and the light transmission portion is a curved shape (see FIG. 4B) that is convex inside the light scattering portion, and the average slope angle (with respect to the normal direction of the sheet surface). The average of the angle of the curve tangent is 10 degrees, and the expected angle (for one light transmission part, the point on the most back side of the interface with the adjacent light scattering part and the light scattering part adjacent to the opposite side The angle of the line connecting the most front point of the interface with respect to the sheet surface (see θ1 in FIG. 3) was set to 49 degrees.

(Example 2)
An optical sheet was produced in the same manner as in Example 1 except that the cross-sectional shape of the interface between the light scattering portion and the light transmitting portion was different. That is, the cross-sectional shape of the interface between the light scattering portion and the light transmitting portion is made to be a curved shape that is convex to the outside (adjacent light transmitting portion side) of the light scattering portion.

(Example 3)
An optical sheet was produced in the same manner as in Example 1 except that the cross-sectional shape of the interface between the light scattering portion and the light transmitting portion was different. That is, the cross-sectional shape of the interface between the light scattering portion and the light transmitting portion is stepped (see FIG. 4A).

(Comparative Example 1)
An optical sheet was produced in the same manner as in Example 1 except that the cross-sectional shape of the interface between the light scattering portion and the light transmitting portion was different. That is, the cross-sectional shape of the light scattering portion is an isosceles trapezoid whose width becomes narrower from the front side toward the back side.

  The optical sheets of Examples 1, 2, 3 and Comparative Example 1 produced as described above were each bonded to the observer side of the screen using an acrylic adhesive and observed. As a result, the optical sheets of Examples 1, 2, and 3 were able to suppress the occurrence of rainbow-like color unevenness as compared with the optical sheet of Comparative Example 1.

10 Projector 20 Projector 100, 200, 300, 400 Screen (Reflective Screen)
111 Panel 112, 212 Laminate 113 Adhesive layer 114, 114a, 114b, 114 ', 314, 414 Light scattering layer 115, 315, 415 Light transmission part 116, 116a, 116b, 316, 416 Light scattering part 116x Blackening layer 117 Base material layer 118 Adhesive layer 119 Hard coat layer 500, 600, 700, 800 Screen (transmission screen)
514, 614, 714, 814 Light scattering layer 715, 815 Light transmission part 516, 616, 716, 816 Light scattering part

Claims (13)

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 that scatters light formed on one surface of the base material layer,
The light scattering layer is
A plurality of light transmitting portions arranged in parallel on the base material layer to transmit light;
A light scattering part that scatters light, disposed between the plurality of light transmission parts,
A screen in which an interface between the light transmission part and the light scattering part is a curved line or a polygonal line in a thickness direction cross section parallel to the parallel direction of the plurality of light transmission parts.   The screen according to claim 1, wherein a parallel pitch of the light scattering portions is 100 μm or more.   The screen according to claim 1, wherein the light scattering layer includes the light scattering portions having different parallel pitches.   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 4, wherein the pigment has conductivity.   The light scattering portion includes 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. The screen according to any one of?   The screen according to any one of claims 1 to 6, wherein the light transmission part and the light scattering part 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 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 any one of claims 1 to 9, 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. A method for producing a screen according to any one of claims 1 to 11,
Producing an intermediate sheet in which a plurality of the light transmission parts are formed at predetermined intervals on the base material layer;
Supplying the composition to be the light scattering portion on the intermediate sheet in an excessive amount, and scraping the composition with a blade to fill the composition between the light transmission portions. Screen manufacturing method. A method for producing a screen according to any one of claims 1 to 11,
A step of supplying an excessive amount of the composition to be the light scattering portion to a mold having grooves corresponding to the uneven shape of the light scattering portion, scraping the composition with a blade, and filling the groove with the composition. When,
A step of bringing the base material layer into contact with the mold to cure the composition, and producing an intermediate sheet in which the light scattering portion is formed on the base material layer;
Supplying a composition to be the light transmission part on the intermediate sheet to form the light transmission part.

Images