JP2013020210A - Transmission type screen, rear projection type display device having the same, and method for manufacturing transmission type screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission type screen capable of enhancing designability, an outline and a contrast.SOLUTION: A transmission type screen 10 for transmitting video light projected from a video light incident side to a video light emission side comprises: a Fresnel lens sheet 20 having a Fresnel lens portion 22; and a stacked body 30 that includes a light control sheet 45 that is arranged in the video light emission side of the Fresnel lens sheet 20 and has a plurality of unit light transmission portions 47 constituting a part of the video light emission face of the light control sheet 45 and a plurality of unit light absorption portions 48 that are alternately arranged with the unit light transmission portions 47 and constitute a part of the video light emission face of the light control sheet 45, a light diffusion layer 55 that is arranged in the video light emission side of the light control sheet 45 and includes light diffusion particles, and a colored layer 60 arranged in the video light emission side of the light diffusion layer 55, the Fresnel lens sheet 20 and the stacked body 30 are bent so as to form a curved face.

Description

  The present invention relates to a transmissive screen, a rear projection display device including the transmissive screen, and a method of manufacturing the transmissive screen.

  2. Description of the Related Art In a rear projection type display device that projects and displays video light from the back side of the screen, a transmissive screen that transmits the projected video light and displays an image is used. As such a transmission screen, screens of various structures have been proposed. For example, there are screens having a diffusion layer including light diffusion particles for diffusing video light to widen the viewing angle (for example, , See Patent Document 1).

  On the other hand, in the field of automobiles, for example, design is very important. At present, a rear projection display device applied to such a field is not only expected to have a function of displaying an image, but also requires harmony with the entire system in terms of design.

  From such a viewpoint of design, development of a transmissive screen having a curved surface shape is desired. However, in a transmissive screen having a light diffusing layer containing light diffusing particles, when the laminate including the light diffusing layer is heated and bent into a curved shape, the light diffusing particles embedded in the light diffusing layer are heated. The surface of the light diffusion layer is raised, and fine irregularities are formed on the surface of the light diffusion layer. When such fine irregularities are formed, even when a surface layer such as a hard coat layer is formed on the surface, the irregularities are visually recognized and the appearance of the transmission screen may be deteriorated. In particular, when a glossy appearance is required, this deterioration of the appearance is a serious problem. In addition, further improvements in contrast are required for transmissive screens.

JP 2005-37496 A

  The present invention has been made to solve the above problems. That is, a transmissive screen capable of improving design, appearance, and contrast, a rear projection display device including the transmissive screen, and a transmissive screen manufacturing method capable of manufacturing such a transmissive screen are provided. The purpose is to do.

  According to one aspect of the present invention, there is provided a transmissive screen that transmits image light projected from an image light incident side to the image light exit side, a Fresnel lens sheet having a Fresnel lens portion, and the Fresnel lens sheet. A light control sheet disposed on the image light emitting side, wherein a plurality of unit light transmitting portions constituting a part of the image light emitting surface of the light control sheet, and the unit light transmitting portions are alternately disposed, A light control sheet having a plurality of unit light absorbing portions constituting a part of the image light emission surface of the light control sheet, and a light diffusion layer disposed on the image light emission side of the light control sheet and including light diffusion particles And a laminate including a colored layer disposed on the image light exit side of the light diffusion layer, and the Fresnel lens sheet and the laminate are bent so as to form a curved surface. screen It is provided.

  According to another aspect of the present invention, there is provided a rear projection display, comprising: the transmissive screen; and a video light source that is disposed on a rear side of the transmissive screen and that projects video light on the screen. An apparatus is provided.

  According to another aspect of the present invention, there is provided a transmissive screen manufacturing method for transmitting image light projected from an image light incident side to an image light exit side, which is a light control sheet, A plurality of unit light transmitting portions constituting a part of the image light emitting surface and a plurality of unit light absorbing portions arranged alternately with the unit light transmitting portion and constituting a part of the image light emitting surface of the light control sheet A light control sheet, a light diffusion layer disposed on the image light exit side of the light control sheet and including light diffusing particles, and a colored layer disposed on the image light exit side of the light diffusion layer. A step of forming a laminate, a step of softening the laminate by heating and forming the softened laminate into a curved surface, and forming the curved laminate into a curved shape having a Fresnel lens portion Image light emission from a fresnel lens sheet Method for producing a transmissive screen and a step of disposing a is provided.

  According to another aspect of the present invention, there is provided a transmissive screen manufacturing method for transmitting image light projected from an image light incident side to an image light exit side, which is a light control sheet, A plurality of unit light transmitting portions constituting a part of the image light emitting surface and a plurality of unit light absorbing portions arranged alternately with the unit light transmitting portion and constituting a part of the image light emitting surface of the light control sheet A light control sheet, a light diffusion layer disposed on the image light exit side of the light control sheet and including light diffusing particles, and a colored layer disposed on the image light exit side of the light diffusion layer. A step of forming a laminated body, a step of laminating the laminated body and a Fresnel lens sheet having a Fresnel lens portion so that the laminated body is disposed on the image light emitting side of the Fresnel lens sheet; The Fresnel lens sea The laminate and is softened by heating the method for producing a transmissive screen comprising the steps of curved molding the Fresnel lens sheet and the laminate were softened is provided with.

  According to the transmissive screen of one aspect of the present invention and the rear projection display device of another aspect, the Fresnel lens sheet and the laminated body are bent so as to form a curved surface, so that the design can be improved. . In addition, since the colored layer is formed on the image light emitting side of the light diffusion layer, even if the light diffusion particles are raised on the surface and fine irregularities are formed on the surface of the light diffusion layer, this Fine irregularities can be absorbed by the colored layer. Thereby, an external appearance can be improved. Furthermore, since this colored layer can absorb external light, the luminance of the black portion (black luminance) can be reduced, thereby improving the contrast.

  According to the method for manufacturing a transmission screen of another aspect of the present invention, since the laminate is curved-shaped, a transmission screen with improved design can be obtained. In addition, since the colored layer is formed on the image light emitting side of the diffusion layer, even if the light diffusion particles are raised on the surface and fine irregularities are formed on the surface of the light diffusion layer, this fine layer is formed. Unevenness can be absorbed by the colored layer. Thereby, it is possible to obtain a transmission screen having an improved appearance. Further, since the outside light can be absorbed by the colored layer, the black luminance can be reduced, and thereby a transmissive screen with improved contrast can be obtained.

It is a typical perspective view of the transmission type screen concerning a 1st embodiment. It is a schematic block diagram of the transmission type screen which concerns on 1st Embodiment. It is sectional drawing when a transmission type screen is cut | disconnected along the II line | wire of FIG. FIG. 3 is a schematic perspective view of the Fresnel lens sheet shown in FIG. 2. FIG. 3 is a plan view of the Fresnel lens sheet when the Fresnel lens sheet shown in FIG. 2 is viewed from the image light emitting side. It is a figure which shows the Fresnel lens sheet of the other aspect which concerns on 1st Embodiment. FIG. 3 is a schematic perspective view of the light control sheet shown in FIG. 2. It is sectional drawing when a light control sheet is cut | disconnected along the II-II line | wire of FIG. It is the figure which showed typically the manufacturing process of the transmission type screen which concerns on 1st Embodiment. It is the figure which showed typically the manufacturing process of the transmission type screen which concerns on 1st Embodiment. It is the figure which showed typically the manufacturing process of the transmission type screen which concerns on 1st Embodiment. It is typical sectional drawing of the rear projection type display apparatus which concerns on 1st Embodiment. It is the figure which showed typically the manufacturing process of the transmissive screen which concerns on 2nd Embodiment. It is typical sectional drawing of the rear projection type display apparatus which has a touch-panel function which concerns on 3rd Embodiment. It is the figure which looked at the rear projection type display apparatus which has a touch-panel function which concerns on 3rd Embodiment from upper direction.

(First embodiment)
<Transparent screen>
First, a transmission screen according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a transmissive screen according to the present embodiment, FIG. 2 is a schematic configuration diagram of the transmissive screen according to the present embodiment, and FIG. 3 is taken along line II in FIG. It is sectional drawing when a transmission type screen is cut. 4 is a schematic perspective view of the Fresnel lens sheet shown in FIG. 2, and FIG. 5 is a plan view of the Fresnel lens sheet when the Fresnel lens sheet shown in FIG. 2 is viewed from the image light emitting side. 6 is a diagram showing a Fresnel lens sheet according to another aspect of the present embodiment, FIG. 7 is a schematic perspective view of the light control sheet shown in FIG. 2, and FIG. 8 is taken along the line II-II in FIG. It is sectional drawing when a light control sheet is cut along.

  The transmissive screen 10 shown in FIGS. 1 and 2 includes a Fresnel lens sheet 20 and a laminate 30 disposed on the image light emitting side of the Fresnel lens sheet 20.

  The Fresnel lens sheet 20 and the laminated body 30 are bent so as to form a curved surface. Specifically, the Fresnel lens sheet 20 and the laminated body 30 are bent so as to form a two-dimensional curved surface or a three-dimensional curved surface. Preferably, the Fresnel lens sheet 20 and the laminated body 30 are bent so as to form a three-dimensional curved surface as shown in FIGS. 1 and 2. Here, in the present specification, the “two-dimensional curved surface” is a two-dimensional curve around a single axis, or a two-dimensional curve with different curvatures around a plurality of parallel axes. In addition, the term “three-dimensional curved surface” means that it is partially or entirely bent around a plurality of axes inclined with respect to each other. The Fresnel lens sheet 20 and the laminated body 30 can have a portion with a radius of curvature of 2000 mm or less, preferably a radius of curvature of 250 mm to 1500 mm.

  In the present embodiment, as shown in FIG. 1, the Fresnel lens sheet 20 and the laminate 30 are first parallel to one diagonal line and positioned on the back side (image light incident side) of the transmissive screen 10. Bends in a direction d1 centered on the axis A1, and also in a direction d2 centered on a second axis A2 that is parallel to the other diagonal line and located on the back side (image light incident side) of the transmissive screen 10 . As a result, the transmissive screen 10 is bent so as to be convex toward the viewer side, and the image light of the transmissive screen 10 is at a central position P where a pair of rectangular diagonal lines forming the planar shape of the transmissive screen 10 intersect. The emission surface 10a (display surface) protrudes most to the viewer side. The transmissive screen 10 shown in FIG. 1 is bent so as to be convex toward the viewer side. However, the transmissive screen is not limited to this, and the transmissive screen is concave toward the viewer side, that is, convex toward the back side. It may be bent so as to be, or it may have a shape combining a portion bent so as to be convex toward the observer side and a portion bent so as to be convex toward the back side.

Fresnel lens sheet A Fresnel lens sheet 20 shown in FIGS. 2 and 3 includes a base portion 21 and a Fresnel lens portion 22 formed on the surface of the base portion 21.

  The Fresnel lens unit 22 has a function of deflecting the traveling direction of the image light projected on the transmission screen 10 as a divergent light beam from an image light source (not shown). Specifically, the Fresnel lens unit 22 converts the image light incident as a divergent light beam into a parallel light beam traveling from the image light incident side toward the image light emitting side, for example, a parallel light beam traveling in the front direction N. As described above, once the image light is collimated once using the Fresnel lens unit 22, the in-plane variation in the brightness of the image observed by the observer, in particular, the image observed from the oblique direction by the observer. Can be effectively relieved.

  In the present embodiment, as shown in FIGS. 4 and 5, the Fresnel lens unit 22 is configured as a so-called circular Fresnel lens. However, the present invention is not limited to this, and it may be configured as a so-called linear Fresnel lens. In the linear Fresnel lens, each of the plurality of unit lenses extends linearly, and the plurality of unit lenses are arranged in an arrangement direction that intersects the longitudinal direction thereof.

As shown in FIG. 5, the Fresnel lens portion 22 preferably has an optical center O ₂ at a position decentered with respect to the center O ₁ of the Fresnel lens portion forming surface 20 a of the Fresnel lens sheet 20. Specifically, the Fresnel lens 22 is composed of a concentric arc or a plurality of concentric unit prisms 23 around the optical center O _2.

  The “Fresnel lens portion forming surface” is a surface on which the Fresnel lens portion is formed in the Fresnel lens sheet. When the Fresnel lens sheet is a refractive Fresnel lens sheet, the Fresnel lens portion forming surface is an image light. When the Fresnel lens sheet is a total reflection type Fresnel lens sheet to be described later, the Fresnel lens part forming surface is positioned on the image light incident side.

The optical center O ₂ of the Fresnel lens portion 22 shown in FIG. 5 exists at a position away from the Fresnel lens sheet 20. For example, in the case where the image light source (not shown) is arranged below the transmission screen 10, the optical center O ₂ is a Fresnel lens sheet 20 outside the center O ₁ of the Fresnel lens forming surface 20a On the other hand, it exists at a position on the lower side in the vertical direction of the transmission screen 10. In the above description, the optical center O ₂ exists at a position away from the Fresnel lens sheet 20, but may exist in the Fresnel lens sheet 20.

  Here, in this specification, the “vertical direction” of the transmissive screen 10 means the vertical direction of the viewer when the viewer views the transmissive screen 10 from the front. 10 "lateral direction" means the left-right direction of the observer when the observer views the transmission screen 10 from the front.

Even when the distance between the Fresnel lens sheet 20 and the image light source is shortened by forming the Fresnel lens portion 22 with the optical center O ₂ decentered in this way, the image light is transmitted from the image light incident side to the image light. It can be converted into a parallel light beam traveling toward the emission side, for example, a parallel light beam traveling in the front direction N shown in FIG. In this embodiment, the Fresnel lens portion 22 is used in which the optical center O ₂ is decentered with respect to the center O _{1 of the} Fresnel lens portion forming surface 20a. However, the optical center is decentered with respect to the center of the Fresnel lens portion forming surface. It is also possible to use a non-Fresnel lens part.

  The Fresnel lens sheet 20 in the present embodiment is a so-called refraction type Fresnel lens, but is not limited to this, and a total reflection type Fresnel lens sheet can also be used.

  As shown in FIG. 6, the total reflection type Fresnel lens sheet 24 refracts incident image light and totally reflects at least a part of the image light refracted by the refracting surface 25a. A plurality of unit prisms 25 having total reflection surfaces 25b directed to the light emitting side are provided. When the total reflection type Fresnel lens sheet 24 is used, the distance between the image light source and the Fresnel lens sheet 24 can be further reduced, so that a thinner rear projection display device can be provided.

  As shown in FIGS. 2 to 4, the Fresnel lens sheet 20 may have an incident-side transparent base material 26 for reinforcing the Fresnel lens sheet 20 on the image light incident side with respect to the base portion 21. The incident-side transparent base material 26 and the base portion 21 are bonded to each other via a bonding layer (not shown) made of an adhesive such as an adhesive or an ultraviolet curable adhesive.

  Similar to the Fresnel lens sheet 20, the incident-side transparent substrate 26 is bent so as to form a curved surface. Examples of the incident-side transparent base material 26 include base materials made of a transparent resin such as an acrylic resin, a styrene resin, a polyester resin, a polycarbonate resin, and an acrylic-styrene copolymer resin.

  The thickness of the incident-side transparent base material 26 is preferably 1.0 to 4.0 mm, and more preferably 1.5 to 2.0 mm. This is because if the thickness of the incident-side transparent base material 26 is less than 1.0 mm, the function as a reinforcing member may not be sufficiently achieved. If the thickness exceeds 4.0 mm, the reason will be described next. This is because a double image is easily recognized by an observer. That is, when the thickness of the Fresnel lens sheet is thick, the distance between the image light emitted from the Fresnel lens sheet and the stray light is larger than when the thickness of the Fresnel lens sheet is thin. Are easily recognized as double images. Therefore, even if the Fresnel lens sheet 20 has the same thickness, if the incident-side transparent base material 26 is thick, the observer can easily recognize a double image.

As shown in FIGS. 2 and 3, the laminated body 30 mainly includes a transparent substrate 35, a bonding layer 40, a light control sheet 45, and a bonding member in order from the image light incident side to the image light emitting side. The layer 50, the light diffusion layer 55, the coloring layer 60, and the surface layer 65 are included. In the present invention, the laminate 30 only needs to have the light control sheet 45, the light diffusion layer 55, and the colored layer 60, and has the transparent substrate 35, the bonding layers 40 and 50, and the surface layer 65. It does not have to be.

Transparent substrate 35 of the transparent substrate stack 30 is to increase the rigidity of the transmission screen 10. Here, it is possible to increase the rigidity of the transmissive screen 10 by increasing the thickness of the incident-side transparent base material 26. However, if the thickness of the incident-side transparent base material 26 is increased, the viewer is doubled. The image is easily recognized. Therefore, it is better for the observer to increase the rigidity of the transmission screen 10 by arranging the transparent substrate 35 than to increase the rigidity of the transmission screen 10 by increasing the thickness of the incident-side transparent substrate 26. Is difficult to recognize. Moreover, since the rigidity of the transmissive screen 10 can be increased by disposing the transparent base material 35, the thickness of the incident-side transparent base material 26 can be further reduced, and the double image is further hardly recognized.

  The thickness of the transparent substrate 35 is preferably 1.5 mm or more, and more preferably 3 mm or more. This is because if the thickness of the transparent substrate 35 is less than 1.5 mm, the function of increasing the rigidity of the transmission screen 10 may not be sufficiently achieved.

  Examples of the transparent substrate 35 include a substrate made of a transparent resin such as an acrylic resin, a styrene resin, a polyester resin, a polycarbonate resin, and an acrylic-styrene copolymer resin.

The light control sheet light control sheet 45 is disposed on the image light emission side (observer side) of the transparent substrate 35. It is for transmitting image light incident on the light control sheet 45 and for absorbing stray light that causes double images.

  As shown in FIGS. 3, 7, and 8, the light control sheet 45 includes a base portion 46, a plurality of unit light transmission portions 47 that transmit incident video light formed on the base material portion 46, and external light. And a plurality of unit light absorbing portions 48 that absorb light.

  The base 46 constitutes the image light incident surface 45a of the light control sheet 45 as shown in FIG. As shown in FIG. 8, the unit light transmitting portion 47 and the unit light absorbing portion 48 constitute the image light exit surface 45b of the light control sheet 45, and are arranged along the image light exit surface 45b. . Further, as shown in FIG. 7, the unit light transmitting portions 47 and the unit light absorbing portions 48 extend in the horizontal direction of the transmissive screen 10 and are alternately arranged in the vertical direction of the transmissive screen 10. .

Further, in the arrangement relationship between the light control sheet 45 and the Fresnel lens sheet 20, the unit light transmitting portion 47 and the unit light absorbing portion 48 include the center O ₁ of the Fresnel lens portion forming surface 20 a and the optical center O of the Fresnel lens portion 22. ₂ are arranged in parallel with each other in the first direction along the image light exit surface 45a. In this case, the unit light transmitting portion 47 and the unit light absorbing portion 48 extend in a second direction substantially orthogonal to the first direction and along the image light emitting surface 45a. Here, in FIG. 1 and the like, the “first direction” and the “vertical direction” and the “second direction” and the “lateral direction” coincide with each other, but the “first direction” and the “second direction” are the same. The “direction” is for expressing the positional relationship between the light control sheet 45 and the Fresnel lens sheet 20, and the “first direction” and “vertical direction” and the “second direction” and “lateral direction” are not necessarily one. You don't have to.

  The base portion 46 is a layer serving as a base for forming the unit light transmitting portion 47 and the unit light absorbing portion 48.

  As the base 46, a transparent resin film, a transparent resin plate, a transparent resin sheet, or transparent glass can be used. Transparent resin films include triacetate cellulose (TAC) film, polyester film such as polyethylene terephthalate (PET), diacetyl cellulose film, acetate butyrate cellulose film, polyethersulfone film, polyacrylic resin film, polyurethane resin film Polyester film, polycarbonate film, polysulfone film, polyether film, polymethylpentene film, polyether ketone film, (meth) acrylonitrile film, etc. can be suitably used. Among these, polyester films are preferably used. . Examples of the polyester film include polyethylene terephthalate, polybutylene terephthalate, polynaphthalene terephthalate, and polytrimethylene terephthalate.

  It is preferable that the unit light transmission part 47 has a substantially trapezoidal cross-sectional shape in the thickness direction of the light control sheet 45. This trapezoid has an image light exit surface 45b as an upper base and an image light incident side as a lower base that is longer than the upper base.

  The unit light transmission portion 47 is made of a light transmissive resin that transmits video light. Examples of the light transmissive resin include a cured product of an ionizing radiation curable resin such as urethane acrylate.

  The unit light absorbing portion 48 is preferably formed in a groove having a V-shaped cross section or a trapezoidal groove having a cross section formed by the unit light transmitting portions 47 adjacent to the unit light absorbing portion 48. That is, in the case where the cross-sectional shape is a V-shaped groove, the unit light absorbing portion 48 has a cross-sectional shape in the thickness direction of the light control sheet 45 that is substantially triangular with the image light exit surface 45b as the bottom. In the case where the shape is a trapezoidal groove, the image light incident side of the light control sheet 45 is the upper base and the image light exit surface 45b of the light control sheet 45 is the lower bottom. Here, the length of the “lower bottom” is longer than the length of the “upper bottom”.

  The unit light absorption part 48 can be comprised from what contained the light absorption material etc. in transparent resin. The transparent resin is preferably made of a material having a refractive index smaller than that of the transparent resin constituting the unit light transmitting portion 47. In addition, there is no particular limitation on what is used as a transparent resin, but for example, ionizing radiation curing of acrylate resins such as urethane acrylate and epoxy acrylate having characteristics of curing by ionizing radiation such as electron beams and ultraviolet rays. A cured product of the mold resin.

  The light absorbing material only needs to have a function of absorbing visible light or stray light, and examples of the light absorbing material include metal salts such as carbon black, graphite, and black iron oxide, pigments or dyes, and pigments. Or the resin particle colored with dye is mentioned.

  When the light absorbing material is resin particles colored with a pigment or dye, the resin particles include plastic beads such as melamine beads, acrylic beads, acrylic-styrene beads, polycarbonate beads, polyethylene beads, polystyrene beads, etc. Of these, acrylic beads are preferred.

Light Diffusing Layer The light diffusing layer 55 is disposed on the image light emitting side (observer side) of the light control sheet 45. This is for isotropically diffusing the image light emitted from the light control sheet 45. The surface of the light diffusion layer 55 has fine irregularities due to the protrusion of light diffusion particles described later.

  The thickness of the light diffusion layer 55 is preferably 0.05 to 2.0 mm, and more preferably 0.1 to 1.5 mm. This is because if the thickness of the light diffusion layer 55 is less than 0.05 mm, the light diffusion effect may not be sufficiently obtained, and if it exceeds 2.0 mm, the image projected on the transmission screen 10 is blurred. This is because there is a possibility that the video is inferior in resolution.

  The light diffusion layer 55 can be composed of a transparent resin containing light diffusion particles. The light diffusion layer 55 isotropically diffuses image light, for example, due to a difference in refractive index between the transparent resin and the light diffusion particles, or due to the reflectivity of the light diffusion particles themselves. Express function. The image light transmitted through the light control sheet is diffused by the light diffusing ability of the light diffusing layer 55, and the observer can observe the image within the range of the viewing angle corresponding to the light diffusing ability of the light diffusing layer 55. .

  Examples of the transparent resin include methyl methacrylate / butadiene / styrene copolymer (MBS), acrylic resin, polycarbonate resin, and polyethylene terephthalate resin.

  As the light diffusing particles, organic fillers such as plastic beads are preferable, and those having high transparency are particularly preferable. Examples of the plastic beads include melamine beads, acrylic beads, acrylic-styrene beads, polycarbonate beads, polyethylene beads, polystyrene beads, and vinyl chloride beads. Among these, acrylic beads are preferable. Further, not only plastic beads but also silicon beads can be used. Furthermore, it is also possible to use plastic beads and silicon beads in combination.

The colored layer 60 is disposed on the image light emission side (observer side) of the light diffusion layer 55. The colored layer 60 is for absorbing external light incident on the transmission screen 10 from the observer side and effectively absorbing the uneven shape formed on the surface of the light diffusion layer 55.

  The thickness of the colored layer 60 is preferably 10 μm or more and 200 μm or less, and particularly preferably 30 μm or more and 150 μm or less. The thickness within this range is preferable because when the thickness of the colored layer 60 is less than 10 μm, the colored layer 60 cannot effectively absorb external light, and the unevenness formed on the surface of the light diffusion layer 55 is effective. This is because it may not be able to be absorbed. Moreover, it is because there exists a possibility that the transmittance | permeability of video light may fall when the thickness of the colored layer 60 exceeds 200 micrometers. In this case, in order to maintain the predetermined brightness, it is necessary to increase the output of the video light source, which may increase the power consumption.

  The colored layer 60 can be composed of a transparent resin containing a light absorber or a colorant. Examples of the transparent resin include methyl methacrylate / butadiene / styrene copolymer (MBS), acrylic resin, polycarbonate resin, and the like. Examples of the light absorber include metal salts such as carbon black, graphite, and black iron oxide. Examples of the colorant include dyes and pigments such as gray.

  The colored layer 60 does not contain light diffusing particles, but the colored layer may contain light diffusing particles. When the colored layer contains light diffusing particles, the light diffusing particles are preferably contained in the colored layer in a proportion of more than 0% by weight and 25% by weight or less. The reason why the ratio of the light diffusing particles is preferably in this range is that if it exceeds 25% by weight, the glossiness may be lost due to the rising of the light diffusing particles contained therein.

The surface layer surface layer 65 is a layer provided closer to the observation surface than the colored layer 60, and has at least one of a hard coat function, an antiglare function, an antireflection function, an antistatic function, an ultraviolet absorption function, and an antifouling function. It is a layer which has. In the present embodiment, the surface layer 65 is a layer having a hard coat function (hard coat layer). The hard coat layer has transparency and exhibits a hardness of “HB” or higher in a pencil hardness test specified by JISK5600-5-4 (1994).

<Transparent Screen Manufacturing Method>
Such a transmission type screen 10 can be manufactured by the following manufacturing method, for example. FIG. 9A to FIG. 11 are diagrams showing manufacturing steps of the transmission screen according to the present embodiment.

  First, the Fresnel lens sheet 20 is prepared. The Fresnel lens sheet 20 can be obtained, for example, as follows. That is, an ionizing radiation curable resin such as an ultraviolet curable resin is filled between the base 21 made of a transparent resin such as an acrylic resin, an epoxy resin, a polycarbonate resin, a polyester resin, and an acrylic-styrene copolymer resin and the mold. The Fresnel lens portion 22 is formed by curing the ionizing radiation curable resin by irradiating ionizing radiation. Thereby, the Fresnel lens sheet 20 is produced. And the incident side transparent base material 26 is joined to the image light incident surface of the base portion 21 using a joining layer (not shown) made of an adhesive such as an adhesive or an ultraviolet curable adhesive, and the incident side transparent base material is joined. A Fresnel lens sheet 20 having 26 on the back side is formed (FIG. 9A).

  After the Fresnel lens sheet 20 is produced, the Fresnel lens sheet 20 is heated and softened, and, for example, a curved surface is formed so that the Fresnel lens part 22 side is convex (FIG. 9B). Specifically, the Fresnel lens sheet 20 is heated and softened to a temperature equal to or higher than the glass transition temperature of the resin constituting the Fresnel lens sheet 20. More specifically, it is softened by heating to 60 to 250 ° C., preferably 70 to 200 ° C. Then, the softened Fresnel lens sheet 20 is pressed against a mold surface (not shown) having a predetermined curved surface shape using, for example, a pressing member, or pressurized using gas pressure. Thus, the Fresnel lens sheet 20 is pressed in a non-contact manner. During the curved surface molding, the atmosphere between the Fresnel lens sheet 20 and the mold surface is preferably maintained in a reduced pressure state, and more preferably maintained in a vacuum state. Thereby, the Fresnel lens sheet 20 can be formed into a curved surface. In the above description, the Fresnel lens sheet 20 is curved so that the Fresnel lens portion 22 side is convex. However, the present invention is not limited to this, and the Fresnel lens portion 22 side is concave, that is, the incident-side transparent base material 26. The Fresnel lens sheet 20 may be curved so that the side is convex, and the Fresnel lens sheet 20 has a shape combining a convex part on the Fresnel lens part 22 side and a concave part on the Fresnel lens part 22 side. 20 may be formed into a curved surface.

  On the other hand, a transparent substrate 35, a light control sheet 45, a light diffusion layer 55, and a colored layer 60 are prepared. The light control sheet 45 can be produced, for example, by the following method. That is, a sheet-like base 46 is fed into a mold (not shown) having a plurality of grooves corresponding to the shape of the unit light transmitting section 47, and an ionizing radiation type resin or the like is placed between the mold and the base 46. The light transmitting part composition is supplied, and the light transmitting part composition is filled between the base 46 and the mold. Thereafter, ionizing radiation is applied to cure the light transmissive portion composition, thereby forming the unit light transmissive portion 47 on the base 46.

  After the unit light transmission part 47 is formed, the unit light transmission part 47 is pulled out from the mold, and a light absorbing material including a light absorbing material and an ionizing radiation curable resin in a groove between the plurality of unit light transmission parts 47 is used. The composition is applied and filled with a doctor blade or the like. Then, the composition for light absorption parts is hardened by ionizing radiation, and the unit light absorption parts 48 are formed between the unit light transmission parts 47. Thereby, the light control sheet 45 is produced.

  The light diffusing layer 55 and the colored layer 60 are produced, for example, by coextruding a transparent resin containing light diffusing particles and a transparent resin containing a light absorber or a colorant into a plate shape using a coextrusion molding apparatus. can do. In addition, you may form the light-diffusion layer 55 and the colored layer 60 separately instead of coextrusion. Further, since the transparent resin and the light diffusing particles used for the light diffusion layer 55 and the transparent resin and the colorant used for the colored layer 60 have been described above, the description thereof will be omitted.

  And the transparent base material 35 prepared in this way, the light control sheet 45, the light-diffusion layer 55, and the colored layer 60 are laminated | stacked in this order, and the laminated body 80 is formed (FIG. 10 (a)). When laminating these sheets and layers, the transparent base material 35 and the light control sheet 45, and the light control sheet 45 and the light diffusion layer 55 are made of an adhesive such as an adhesive or an ultraviolet curable adhesive. It joins using the joining layers 40 and 50 which become.

  After producing the laminated body 80, the laminated body 80 is heated and softened, and is curved-shaped so that the colored layer 60 side is convex (FIG. 10B). Specifically, the laminate 80 is heated to the glass transition temperature or higher of the transparent substrate 35 and softened. More specifically, it is softened by heating to 60 to 250 ° C., preferably 80 to 200 ° C. Then, the softened laminated body 80 is pressed against the mold surface having a predetermined curved surface shape by using, for example, a pressing member, or by pressurization using a gas pressure, in a non-contact manner. Press 80. During this curved surface molding, the atmosphere between the laminate and the mold surface is preferably kept in a reduced pressure state, more preferably in a generally vacuum state. Thereby, the laminated body 80 can be curved-surface molded.

  After the laminate 80 is formed into a curved surface, the surface layer 65 is formed on the colored layer 60 to form the laminate 30 (FIG. 10C). When forming a hard coat layer as the surface layer 65, a hard coat layer composition containing an ionizing radiation curable resin is applied, dried, and cured by ionizing radiation such as ultraviolet rays. Thereby, a hard coat layer as the surface layer 65 is formed on the colored layer 60. The hard coat layer can be formed by forming a semi-cured hard coat layer in advance, placing the hard coat layer on the colored layer, and then curing the hard coat layer. It is also possible to form a hard coat layer by applying a thermosetting paint, drying by heating and curing.

  Finally, the curved body-formed laminate 30 is disposed on the image light emitting side of the curved surface-formed Fresnel lens sheet 20 (FIG. 11). In this state, the transparent substrate 35 is on the Fresnel lens portion 22 side of the Fresnel lens sheet 20, and the colored layer 60 is on the observer side. Thereby, the transmission type screen 10 shown in FIG. 1 is completed.

<Rear projection display device>
The transmissive screen 10 can be used by being incorporated in a rear projection display device. As such a rear projection type display device, for example, a rear projection type display device for in-vehicle use or marine use can be cited.

  Hereinafter, a rear projection display device incorporating the transmission screen 10 will be described. FIG. 12 is a schematic cross-sectional view of the rear projection display device according to this embodiment. As shown in FIG. 12, the rear projection display device 70 projects image light onto, for example, the transmissive screen 10, a screen support 71 such as a housing that supports the transmissive screen 10, and the transmissive screen 10. An image light source 72 is provided.

  In the present embodiment, the transmissive screen 10 is supported by the screen support 71 such that the transmissive screen 10 is in the vertical direction. In particular, of the image light exit surface 10a of the transmissive screen 10, the surface orthogonal to the normal direction at the position protruding to the viewer side (corresponding to the central position P of the transmissive screen 10 in the present embodiment) (that is, , The contact surface at the position most protruding to the viewer side) is substantially parallel to the vertical direction.

  The video light source 72 is disposed on the back side of the transmissive screen 10. The image light source 72 shown in FIG. 12 is disposed below the transmissive screen 10 and is configured to project image light onto the transmissive screen 10 without using a mirror or the like. Note that image light may be projected onto the transmissive screen 10 via a mirror or the like.

In this case, in the transmissive screen 10, the extending direction of the unit light transmitting portion 47 and the unit light absorbing portion 48 is the horizontal direction, and the optical center O ₂ of the Fresnel lens portion 22 is the center O _{1 of the} Fresnel lens portion forming surface 20a. It arrange | positions so that it may become the vertical direction lower side.

In FIG. 12, the image light source 72 is disposed below the transmissive screen 10, but the image light source 72 may be disposed above the transmissive screen 10. In this case, in the transmissive screen 10, the extending direction of the unit light transmitting portion 47 and the unit light absorbing portion 48 is the horizontal direction, and the optical center O ₂ of the Fresnel lens portion 22 is the center O _{1 of the} Fresnel lens portion forming surface 20a. It arrange | positions so that it may become the vertical direction upper side.

  The image light source 72 irradiates the image light on the entire area of the image light incident surface 10 b of the transmissive screen 10 as a divergent light beam (expanded and projected light beam) in which the irradiation region gradually expands. Examples of such an image light source 72 include a known light source, for example, a small light source such as a pico projector using an LED or a laser.

In such a rear projection display device 70, when image light is emitted from the image light source 72, the image light is diverged as shown in FIG. 12, and the entire area of the image light incident surface 10b of the transmissive screen 10 is diverged. Projected on. As shown in FIG. 3, the image light L ₁ projected onto the image light incident surface 10 b of the transmissive screen 10 passes through the incident-side transparent base material 26 and enters the Fresnel lens sheet 20. Then, the image light L ₁ is converted into light directed in the front direction N by the Fresnel lens unit 22. The image light L _{1 that} has become light directed in the front direction N enters the light control sheet 45 through the transparent base material 35 and exits from the light control sheet 45 through the unit light transmission portion 47. The image light L ₁ emitted from the light control sheet 45 is diffused by the light diffusion layer 55 and emitted from the image light emission surface 10 a of the transmissive screen 10 through the colored layer 60 and the surface layer 65. In such a rear projection display device 70, the image light is once converted into light directed in the front direction N by the Fresnel lens sheet 20, and then diffused in the light diffusion layer 55. Therefore, the image displayed from each direction is displayed. When the image is observed, it is possible to provide a high-quality image with reduced in-plane variation in brightness.

Further, not only the image light but also the stray light L ₂ is emitted from the Fresnel lens sheet 20 and enters the light control sheet 45 as shown in FIG. 3, but the stray light L ₂ is substantially parallel to the front direction N. Therefore, the stray light L ₂ is absorbed by the unit light absorber 48. Further, as shown in FIG. 3, the external light L ₃ incident from the observer side is absorbed by the colored layer 60. The external light is absorbed not only by the colored layer 60 but also by the unit light absorbing portion 48 of the light control sheet 45.

  According to this embodiment, since the Fresnel lens sheet 20 and the laminated body 30 are bent so as to form a curved surface, the design can be improved.

  According to the present embodiment, since the colored layer 60 is formed on the image light emitting surface side of the light diffusion layer 55, the light diffusion particles embedded in the light diffusion layer 55 by the heating at the time of curved surface formation are diffused. Even if the surface of the light diffusing layer 55 is raised on the surface of the layer 55 to form a fine concavo-convex shape, the fine concavo-convex shape can be absorbed by the colored layer 60, and the fine concavo-convex shape is hardly visible. A transmission screen 10 can be obtained. Thereby, the external appearance of the transmissive screen 10 can be improved.

  According to this embodiment, since the colored layer 60 is formed on the image light emission side of the light diffusion layer 55, the colored layer 60 can absorb external light more, thereby improving the contrast. it can. That is, assuming external light that is incident on the transmissive screen and reflected at the interface between the colored layer and the light diffusion layer, the colored layer is disposed on the back side (video light source side) from the light diffusion layer. Since external light is hardly absorbed when passing through the light diffusion layer, the external light reflected from the interface between the light diffusion layer and the colored layer is hardly reduced. On the other hand, when the colored layer is arranged on the surface side (observer side) from the light diffusion layer, external light is absorbed when passing through the colored layer, so the interface between the colored layer and the light diffusion layer. The external light that is reflected by the colored layer and emitted from the colored layer is reduced. In addition, when external light is incident on the light diffusion layer, some of the external light incident on the light diffusion layer is scattered on the surface side (observer side) by the light diffusion particles in the light diffusion layer. When external light scattered on the surface side is emitted from the transmission screen, the contrast may be lowered. When the colored layer is arranged on the back side (video light source side) from the light diffusion layer, unless a layer for absorbing external light is arranged on the surface side from the light diffusion layer, the colored layer is placed on the surface side by the light diffusion particles. The scattered outside light may be emitted from the transmission screen. On the other hand, when the colored layer is disposed on the surface side of the light diffusion layer, the external light scattered to the surface side by the light diffusion particles is incident on the colored layer again, and thus a layer for absorbing external light Even if it does not arrange | position, it can absorb with a colored layer and the emission of the external light from a transmissive screen can be suppressed. Therefore, when comparing the case where the colored layer is arranged on the surface side with respect to the light diffusing layer and the case where the colored layer is arranged on the back side with respect to the light diffusing layer, the external light absorptance is determined by the colored layer diffusing light. It is higher when it is arranged on the surface side than the layer. Therefore, in this embodiment, external light can be absorbed more. Thereby, reflection of external light on the transmissive screen 10 can be suppressed, and the contrast can be improved.

  If the surface layer 65 is formed on the colored layer 60 before the laminated body 80 is curved-shaped, the surface layer 65 may be broken when the laminated body 80 is curved-shaped. On the other hand, in this embodiment, since the surface layer 65 is formed on the colored layer 60 after the laminated body 80 is curved-shaped, the surface layer 65 can be prevented from cracking.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described. In this embodiment, an example in which a transmission screen is manufactured by a method different from that of the first embodiment will be described. FIG. 13A to FIG. 13C are diagrams schematically showing a manufacturing process of the transmission screen according to the second embodiment.

  First, as in the first embodiment, a Fresnel lens sheet 20 having an incident side transparent base material 26 on the back side is prepared. Moreover, the transparent base material 35, the light control sheet 45, the light-diffusion layer 55, and the colored layer 60 are prepared similarly to 1st Embodiment, these are laminated | stacked in this order, and the laminated body 80 is formed.

  Thereafter, the Fresnel lens sheet 20 and the laminated body 80 are laminated so that the laminated body 80 is disposed on the image light emitting side of the Fresnel lens sheet 20 (FIG. 13A). In the laminated state, the transparent base material 35 is on the Fresnel lens portion 22 side of the Fresnel lens sheet 20, and the colored layer 60 of the laminated body 80 is on the observer side.

  After the Fresnel lens sheet 20 and the laminate 80 are laminated, they are heated and softened, and the Fresnel lens sheet 20 and the laminate 80 are curved so that the colored layer 60 side is convex (FIG. 13B). ).

  After the Fresnel lens sheet 20 and the laminate 80 are formed into a curved surface, the surface layer 65 is formed on the colored layer 60 to form the laminate 30 (FIG. 13C). Thereby, the transmission type screen 10 shown in FIG. 1 is completed.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described. In the present embodiment, an example in which a transmission screen is incorporated in a rear projection display device having a touch panel function will be described. FIG. 14 is a schematic cross-sectional view of a rear projection display device having a touch panel function according to the present embodiment, and FIG. 15 is a view of the rear projection display device having a touch panel function according to the present embodiment as viewed from above. is there. In FIG. 14 and FIG. 15, members and the like having the same reference numerals as those in the first embodiment are the same as the members and the like described in the first embodiment, and thus description thereof is omitted. .

  As shown in FIG. 14, the rear projection display device 90 includes, for example, a transmissive screen 10, a screen support 71 that supports the transmissive screen 10 such as a housing, and an image that projects image light on the transmissive screen 10. A light source 72 is provided. Further, as shown in FIGS. 14 and 15, the rear projection display device 90 includes an infrared light source 91 that projects infrared light onto the transmissive screen 10, a CCD camera that can detect infrared light, and the like. An infrared light detector 92 and the like are provided. The infrared light source 91 and the infrared light detector 92 are disposed on the back side of the transmissive screen 10.

  Infrared light emitted from the infrared light source 91 passes through the transmissive screen 10. Thereby, for example, when a finger or a dedicated pen touches the transmissive screen 10, infrared light is reflected by the finger or the like, so that the finger position information can be detected by the infrared light detector 92. it can. Thereby, a touch panel function is realizable.

  The present invention is not limited to the description of the above embodiment, and the structure, material, arrangement of each member, and the like can be changed as appropriate without departing from the scope of the present invention.

  In order to describe the present invention in detail, the following examples will be described.

Example 1
First, a Fresnel lens sheet was prepared. As the incident side transparent base material of the Fresnel lens sheet, an acrylic plate having a thickness of 1.3 mm was used. The Fresnel lens portion of the Fresnel lens sheet is made of an ultraviolet curable resin (urethane acrylate) and has a unit prism pitch of 105 μm.

  The Fresnel lens sheet was heated to 80 ° C. to be softened and curved-surface molded by vacuum molding. In addition, curved surface shaping | molding was performed so that a curvature radius might be set to 1000 mm.

  On the other hand, a transparent substrate, a light control sheet, a light diffusion layer, and a colored layer were prepared. As the transparent substrate, an acrylic plate having a thickness of 3 mm was used.

  As the light control sheet, a unit having a unit light transmission part and a unit light absorption part formed on a polycarbonate (PC) film and having a thickness of 0.3 mm was used. The unit light transmission part of the light control sheet was made of an ultraviolet curable resin (urethane acrylate), and the refractive index of the unit light transmission part was 1.550. The unit light absorbing portion of the light control sheet is made of an ultraviolet curable resin (urethane acrylate) containing colored particles as a light absorbing material, and the refractive index of the unit light absorbing portion is 1.490. Further, the width of the unit light absorbing part is 30 μm at the image light emitting surface, the width of the tip part on the image light incident side in the unit light absorbing part is 6 μm, and the pitch of the bottom part on the image light emitting side in the unit light absorbing part. Was 60 μm. Furthermore, the angle formed by the normal line of the polycarbonate film and the unit light absorbing portion was 4.5 °.

  As the light diffusion layer, methyl methacrylate / butadiene / styrene copolymer (MBS) resin having a refractive index of 1.550, acrylic beads having a refractive index of 1.550 and an average particle size of 8 μm as light diffusion particles, It was made of a material containing silicon beads having a ratio of 1.420 and an average particle diameter of 2 μm, and a thickness of 0.14 mm was used. The proportion of each component of the light diffusion layer was 50% by weight of methyl methacrylate / butadiene / styrene copolymer resin, 40% by weight of acrylic beads, and 10% by weight of silicon beads. The colored layer is composed of a methyl methacrylate / butadiene / styrene copolymer (MBS) resin having a refractive index of 1.550 containing carbon black as a light absorber and having a thickness of 0.7 mm. used. The ratio of each component of the colored layer was 75% by weight of methyl methacrylate / butadiene / styrene copolymer resin and 25% by weight of carbon black. The colored layer did not contain light diffusing particles. Here, the light diffusion layer and the colored layer were formed by coextrusion molding.

  After preparing a transparent base material etc., the transparent base material, the light control sheet, the light diffusion layer, and the colored layer were laminated in this order to form a laminate. Here, when laminating a transparent base material or the like, the transparent base material and the light control sheet, and the light control sheet and the light diffusion layer were bonded with an ultraviolet curable adhesive.

  And this laminated body was heated at 140 degreeC, it was made to soften, and curved surface shaping | molding was carried out by vacuum forming. In addition, curved surface shaping | molding was performed so that a curvature radius might be set to 1000 mm.

  After the laminated body was formed into a curved surface, an acrylic urethane thermosetting paint was applied to the surface of the colored layer, dried by heating, and then a hard coat layer was formed. Finally, the laminated body was disposed on the image light emitting side of the Fresnel lens sheet to produce a transmission screen according to Example 1.

Example 2
In Example 2, a transmissive screen was produced using the same material and method as Example 1 except that a colored layer containing light diffusing particles was used instead of a colored layer containing no light diffusing particles. Specifically, the colored layer of Example 2 has carbon black as a light absorber in a methyl methacrylate / butadiene / styrene copolymer resin having a refractive index of 1.550 and a refractive index of 1. 550 and acrylic beads having an average particle size of 8 μm. The proportion of each component in the colored layer of Example 2 was 50% by weight of methyl methacrylate / butadiene / styrene copolymer resin, 25% by weight of carbon black, and 25% by weight of acrylic beads.

Comparative Example In the comparative example, a transmissive screen was used by using the same material and method as in Example 1 except that a light diffusing layer containing a light absorbing agent and light diffusing particles was used instead of the light diffusing layer and the colored layer. Was made. Specifically, the light diffusing layer of the comparative example is an acrylic system having a refractive index of 1.55 and an average particle diameter of 8 μm as light diffusing particles in a methyl methacrylate / butadiene / styrene copolymer resin having a refractive index of 1.550. It was composed of beads, silicon-based beads having a refractive index of 1.42 and an average particle diameter of 2 μm, and carbon black as a light absorber. The ratio of each component of the light diffusion layer of the comparative example was 50% by weight of methyl methacrylate / butadiene / styrene copolymer resin, 32.5% by weight of acrylic beads, 5% by weight of silicon beads, and 12.5% by weight of carbon black. Met.

(1) External appearance observation The surface of the transmission type screens of Examples 1 and 2 and Comparative Example on the hard coat layer side was visually observed from the front. The evaluation criteria for the appearance observation were as follows.
(Double-circle): The fine unevenness | corrugation was not confirmed but the very favorable external appearance with a glossiness was obtained.
○: Some fine irregularities were confirmed, but there was no problem in practical use, and a good appearance with gloss was obtained.
X: Many fine unevenness | corrugations were confirmed, there was no glossiness, and the favorable external appearance was not obtained.

(2) Contrast Evaluation Next, the transmissive screens according to Examples 1 and 2 and the comparative example are respectively incorporated in the rear projection display device, and image light is emitted from the image light source to the transmissive screen, and the image is displayed on the transmissive screen. The contrast when displaying was evaluated. The evaluation criteria for this contrast evaluation were as follows.
○: Contrast was good.
Δ: The contrast was not so good.

表１に示されるように比較例に係る透過型スクリーンは、表面に微細な凹凸が多数確認され、外観が良好ではなかった。これに対し、実施例１に係る透過型スクリーンは、微細な凹凸が確認されず、外観が極めて良好であり、実施例２に係る透過型スクリーンは、微細な凹凸が若干確認されたが実用上問題のない程度であり、良好であった。また、実施例１、２に係る透過型スクリーンは、比較例に係る透過型スクリーンに比べて、コントラストが向上していた。この結果から、実施例１、２に係る透過型スクリーンは、外観およびコントラストを向上させることができることが確認された。 The results will be described below.

As shown in Table 1, the transmission screen according to the comparative example had many fine irregularities on the surface, and the appearance was not good. On the other hand, the transmission type screen according to Example 1 has no fine irregularities and the appearance is very good, and the transmission type screen according to Example 2 shows some fine irregularities but is practically used. There was no problem and it was good. Moreover, the transmissive screens according to Examples 1 and 2 had improved contrast as compared with the transmissive screen according to the comparative example. From this result, it was confirmed that the transmissive screens according to Examples 1 and 2 can improve the appearance and contrast.

  DESCRIPTION OF SYMBOLS 10 ... Transmission type screen, 10a ... Image | video light emission surface, 10b ... Image | video light incident surface, 20 ... Fresnel lens sheet, 20a ... Fresnel lens part formation surface, 22 ... Fresnel lens part, 23 ... Unit prism, 26 ... Incident side transparent Base material 35 ... Transparent base material 45 ... Light control sheet 45a ... Image light incident surface 45b ... Image light exit surface 46 ... Base part 47 ... Unit light transmission part 48 ... Unit light absorption part 55 ... Light Diffusion layer, 60 ... colored layer, 65 ... surface layer, 70, 90 ... rear projection display device, 72 ... video light source, 80 ... laminate, 91 ... infrared light source, 92 ... infrared light detector.

Claims (16)

A transmissive screen that transmits image light projected from the image light incident side to the image light exit side,
A Fresnel lens sheet having a Fresnel lens part;
A light control sheet disposed on the image light emitting side of the Fresnel lens sheet, wherein a plurality of unit light transmitting portions constituting a part of the image light emitting surface of the light control sheet, and the unit light transmitting portions are alternately arranged. A light control sheet having a plurality of unit light absorbers constituting a part of the image light exit surface of the light control sheet, and disposed on the image light exit side of the light control sheet, and light diffusing particles A laminate including: a light diffusion layer including: a colored layer disposed on the image light emission side of the light diffusion layer;
The transmissive screen, wherein the Fresnel lens sheet and the laminate are bent so as to form a curved surface.   The transmissive screen according to claim 1, wherein the colored layer has a thickness of 10 μm to 200 μm.   The transmissive screen according to claim 1, wherein the Fresnel lens sheet and the laminate are bent so as to form a three-dimensional curved surface.   The transmissive screen according to any one of claims 1 to 3, wherein the Fresnel lens sheet and the laminate have a portion with a radius of curvature of 2000 mm or less.   The transmissive screen according to claim 1, wherein the colored layer does not substantially contain light diffusing particles.   The transmissive screen according to any one of claims 1 to 4, wherein the colored layer contains light diffusing particles of more than 0% by weight and 25% by weight or less.   The laminate further comprises a surface layer having at least one of a hard coat function, an antiglare function, an antireflection function, an antistatic function, and an antifouling function on the viewer side of the colored layer. Item 7. The transmissive screen according to any one of Items 1 to 6.   The transmissive screen according to any one of claims 1 to 7, wherein the unit light transmitting portion and the unit light absorbing portion extend in a lateral direction of the transmissive screen.   9. The transmissive screen according to claim 8, wherein the Fresnel lens portion has an optical center at a position that is eccentric to the lower side in the vertical direction of the transmissive screen with respect to the center of the Fresnel lens portion forming surface of the Fresnel lens sheet.   The unit light transmission part and the unit light absorption part are substantially parallel to a direction connecting the center of the Fresnel lens part forming surface and the optical center of the Fresnel lens part, and are along the video light emission surface. 8. The apparatus according to claim 1, arranged alternately in a direction, and extending in a second direction substantially perpendicular to the first direction and along the image light exit surface. 9. The transmissive screen as described. The transmission screen according to any one of claims 1 to 10,
A rear projection display device, comprising: an image light source disposed on a rear side of the transmission screen and projecting image light onto the screen. An infrared light source that projects infrared light onto the transmission screen;
The rear projection display device according to claim 11, further comprising: an infrared light detector capable of detecting the infrared light. A method of manufacturing a transmissive screen that transmits image light projected from an image light incident side to the image light exit side,
A light control sheet, wherein a plurality of unit light transmitting portions constituting a part of the image light emitting surface of the light control sheet and the unit light transmitting portions are alternately arranged, and the image light emitting surface of the light control sheet A light control sheet having a plurality of unit light absorbing portions constituting a part of the light control sheet, a light diffusion layer disposed on the image light emission side of the light control sheet and including light diffusion particles, and an image of the light diffusion layer Forming a laminate having a colored layer disposed on the light emitting side;
Softening the laminated body by heating, and forming the softened laminated body into a curved surface;
And placing the laminated body having a curved surface on the image light emitting side of a Fresnel lens sheet having a curved surface and having a Fresnel lens portion. A method of manufacturing a transmissive screen that transmits image light projected from an image light incident side to the image light exit side,
A light control sheet, wherein a plurality of unit light transmitting portions constituting a part of the image light emitting surface of the light control sheet and the unit light transmitting portions are alternately arranged, and the image light emitting surface of the light control sheet A light control sheet having a plurality of unit light absorbing portions constituting a part of the light control sheet, a light diffusion layer disposed on the image light emission side of the light control sheet and including light diffusion particles, and an image of the light diffusion layer Forming a laminate having a colored layer disposed on the light emitting side;
Laminating the laminate and a Fresnel lens sheet having a Fresnel lens portion so that the laminate is disposed on the image light emitting side of the Fresnel lens sheet;
A process for producing a transmission type screen, comprising: heating the laminated Fresnel lens sheet and the laminated body, and softening the softened Fresnel lens sheet and curvedly shaping the laminated body.   The method for producing a transmission screen according to claim 13 or 14, wherein the light diffusion layer and the colored layer are formed by coextrusion molding.   A step of forming a surface layer having at least one of an antiglare function, an antireflection function, an antistatic function, a hard coat function, and an antifouling function on the colored layer after performing curved surface molding on the laminate. The transmissive screen manufacturing method according to claim 13, further comprising:

Images