JP2016089534A - Partition panel and partition system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a partition system which can make the scene on the opposite side of a partition panel unseen from an observer when necessary, is relatively inexpensive, imposes little limitation on design of the partition panel, allows relatively simple installation operation of the partition panel, and imposes little limitation on the installation position of the partition panel; and the partition panel which realizes the above partition system.SOLUTION: There is provided a transparent partition panel 1 having a first surface A and a second surface B on opposite sides. The transparent partition panel 1 includes, between the first surface A and the second surface B, a first transparent layer 32 having an uneven structure on a surface, a reflection film 33 being formed along the surface of the first transparent layer 32 on the uneven structure side and transmitting a portion of incident light, and a second transparent layer 34 being formed to cover a surface of the reflection film 33 and having a refractive index equal to the refractive index of the first transparent layer 32. The transparent partition panel 1 has a transmittance of 1% or greater, a diffuse reflectance of 1% or greater, and a forward haze of 50% or smaller.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a transparent partition panel for partitioning an internal space of a building, and to a partition system that makes it impossible for a viewer to visually recognize a scene beyond the partition panel.

  As a partition for partitioning the internal space of a building, there is a transparent partition provided with a transparent member such as glass. In the case of a transparent partition, it may be required to make it impossible for the observer to visually recognize the scene behind the partition for privacy protection, secret protection, security, and the like.

For example, the following is known as a partition that makes it impossible for a viewer to see the scene behind the partition as needed.
(1) A partition provided with a light control sheet having a light control layer made of a polymer-dispersed liquid crystal (see Patent Document 1). In the partition, the transmission and scattering of light incident on the light control layer is controlled depending on whether or not a voltage is applied to the light control layer, and the light is scattered to thereby disperse the light on the other side of the partition. Make the scene invisible.
(2) A partition provided with a panel body in which a plurality of transparent EL elements are arranged in a lattice pattern (see Patent Document 2). In the partition, when the EL element is turned off, a scene seen from the other side of the transparent member as viewed from the observer side can be visually recognized. When the EL element is turned on, the observer is illuminated by strong light from the EL element. On the other hand, the scene beyond the transparent member cannot be visually recognized.

However, both the partition (1) and the partition (2) have the following problems.
(I) The light control sheet or EL element is expensive.
(Ii) It is necessary to provide a control device for driving and controlling the light control layer or the EL element in the partition, and the design of the partition is limited.
(Iii) It is necessary to provide power supply to the partition and wiring for the operation of the partition, the installation work of the partition is complicated, and the installation location of the partition is limited.

Japanese Patent Application Laid-Open No. 07-239465 JP 2012-012915 A

  The present invention can make it impossible for the viewer to see the scene behind the partition panel as necessary, is relatively inexpensive, has few restrictions on the design of the partition panel, and the installation work of the partition panel is reduced. A partition system that is relatively simple and has few restrictions on the installation location of the partition panel; and a partition panel that can realize the partition system.

The present invention has the following aspects.
[1] A transparent partition panel having a first surface and a second surface opposite to the first surface, the surface having an uneven structure between the first surface and the second surface. A first transparent layer, a reflective film that is formed along the surface of the first transparent layer on the concave-convex structure side and that transmits a part of incident light, and is provided so as to cover the surface of the reflective film A second transparent layer having a refractive index substantially the same as the refractive index of the first transparent layer, a transmittance of 1% or more, and a diffuse reflectance of 1% or more, The partition panel whose front haze is 50% or less.
[2] The partition panel according to [1], wherein the uneven structure on the surface of the first transparent layer is an irregular uneven structure.
[3] A partition system comprising the partition panel according to [1] or [2] and a first light source that is disposed on the first surface side of the partition panel and that irradiates the partition panel with light. .
[4] Total luminous flux Φ _L1 of the first light source, and total luminous flux Φ _{I2 of} illumination closest to the partition panel among illuminations installed to brighten the space on the second surface side of the partition panel; The partition system according to [3], wherein the partition panel has non-diffusive transmittance T ₀ satisfying the relationship of the following formula (1).
_{Φ L1 ≧ Φ I2 × (T} 0/100) / 2 ··· (1)
[5] The partition system according to [3] or [4], further comprising a second light source that is disposed on the second surface side of the partition panel and that irradiates the partition panel with light.
[6] Total luminous flux Φ _L2 of the second light source, and total luminous flux Φ _{I1 of} illumination closest to the partition panel among illuminations installed to brighten the space on the first surface side of the partition panel The partition system according to [5], wherein the partition panel has a non-diffusive transmittance T ₀ satisfying the relationship of the following expression (2).
_{Φ L2 ≧ Φ I1 × (T} 0/100) / 2 ··· (2)

[7] A partition panel having a first surface and a second surface opposite to the first surface, the light scattering layer including a light scattering material between the first surface and the second surface A partition panel having a transmittance of 1% or more and a front haze of 9 to 50%.
[8] A partition system including the partition panel according to [7] and a first light source that is disposed on the first surface side of the partition panel and that irradiates light to the partition panel.
[9] The total luminous flux Φ _L1 of the first light source, and the total luminous flux Φ _{I1 of the} illumination closest to the partition panel among the illuminations installed to brighten the space on the first surface side of the partition panel However, the partition system according to [8] in which the relationship of the following expression (3) is satisfied.
Φ _L1 ≧ Φ _I1 / 10 (3)
[10] The partition system according to [8] or [9], further comprising a second light source that is disposed on the second surface side of the partition panel and that irradiates the partition panel with light.
[11] Total luminous flux Φ _L2 of the second light source, and total luminous flux Φ _{I2 of} illumination closest to the partition panel among illuminations installed to brighten the space on the second surface side of the partition panel However, the partition system according to [10] satisfies the relationship of the following expression (4).
Φ _L2 ≧ Φ _I2 / 10 (4)

[12] A partition panel having a first surface and a second surface opposite to the first surface, wherein a part of incident light is transmitted between the first surface and the second surface. And a light scattering layer containing a light scattering material, the transmittance is 1% or more, the diffuse reflectance is 1% or more, and the forward haze is 9 to 50%. Partition panel.
[13] A partition system comprising the partition panel according to [12] and a first light source that is disposed on the first surface side of the partition panel and that irradiates light to the partition panel.
[14] Total luminous flux Φ _L1 of the first light source, and total luminous flux Φ _{I2 of} illumination closest to the partition panel among illuminations installed to brighten the space on the second surface side of the partition panel The non-diffusive transmittance T _{0 of the} partition panel satisfies the relationship of the following formula (1), and the total light flux Φ _L1 of the first light source and the space on the first surface side of the partition panel are and the total luminous flux [Phi _I1 illumination closest to the partition panel of the installed lighting to bright, satisfy the relation of the following formula (3), partition system [13].
_{Φ L1 ≧ Φ I2 × (T} 0/100) / 2 ··· (1)
Φ _L1 ≧ Φ _I1 / 10 (3)

According to the partition panel of the present invention, it is possible to make the view beyond the partition panel invisible to an observer if necessary, it is relatively inexpensive, there are few restrictions on the design of the partition panel, and the partition Panel installation work is relatively simple, and a partition system with few restrictions on the partition panel installation location can be realized.
The partition system of the present invention can make the scene behind the partition panel invisible to an observer as necessary, is relatively inexpensive, has few restrictions on the design of the partition panel, and Installation work is relatively simple and there are few restrictions on the location of the partition panel.

It is the schematic block diagram which shows an example of the 1st aspect of the partition system of this invention, and the layer block diagram which shows an example of a reflection-scattering type partition panel. It is sectional drawing which shows an example of the manufacturing process of the light-scattering sheet | seat of the partition panel of FIG. It is a figure which shows a mode that light was irradiated to the partition panel from the 1st light source in the partition system of FIG. It is a figure which shows a mode that light was irradiated to the partition panel from the 2nd light source in the partition system of FIG. It is a figure which shows a mode that light was irradiated to the partition panel from the 1st light source and the 2nd light source in the partition system of FIG. It is a layer block diagram which shows the other example of a reflection-scattering type partition panel. It is a layer block diagram which shows the other example of a reflection-scattering type partition panel. It is the schematic block diagram which shows an example of the 2nd aspect of the partition system of this invention, and the layer block diagram which shows the other example of the transmission-scattering type partition panel. It is a figure which shows a mode that light was irradiated to the partition panel from the 1st light source in the partition system of FIG. It is a figure which shows a mode that light was irradiated to the partition panel from the 2nd light source in the partition system of FIG. It is a figure which shows a mode that light was irradiated to the partition panel from the 1st light source and the 2nd light source in the partition system of FIG. It is a layer block diagram which shows the other example of the transmission-scattering type partition panel. It is the schematic block diagram which shows an example of the 3rd aspect of the partition system of this invention, and the layer block diagram which shows an example of the partition panel of a reflection and a transmission bidirectional | two-way scattering type. It is a figure which shows a mode that light was irradiated to the partition panel from the 1st light source in the partition system of FIG.

The following definitions of terms apply throughout this specification and the claims.
The “first surface” means the outermost surface of the partition panel and the surface on the side irradiated with light from the first light source.
The “second surface” means the outermost surface of the partition panel and the surface opposite to the first surface.
“The scene on the first surface side (or the second surface side)” is the other side of the partition panel as viewed from the observer in the space on the second surface side (or the first surface side) of the partition panel. It means an image (a main object (product, artwork, person, etc.) and its background, etc.) seen on the side. The scene does not include an image in which light emitted from the light source is imaged and displayed on the partition panel.
“Uneven structure” means a plurality of protrusions, a plurality of recesses, or an uneven shape composed of a plurality of protrusions and recesses.
The “irregular concavo-convex structure” means a concavo-convex structure in which convex portions or concave portions do not appear periodically and the sizes of the convex portions or concave portions are irregular.
The “sheet” may be a sheet or a continuous belt.
With respect to the transmittance, the light incident from the first surface side (or the second surface side) is transmitted to the second surface side (or the first surface side) without being diffused and diffused. This is the ratio of the total transmitted light and is equivalent to the total light transmittance. However, it does not include those greatly deviated from the incident site or emitted from the end of the member.
The non-diffusive transmittance is a regular transmitted light transmitted to the second surface side (or the first surface side) with respect to the incident light incident at an incident angle of 0 ° from the first surface side (or the second surface side). It is a ratio (percentage) of transmitted light other than transmitted light deviated by 0.044 rad (2.5 °) or more.
The diffuse transmittance is obtained from regular transmitted light transmitted from the first surface side (or the second surface side) to the second surface side (or the first surface side) with respect to incident light incident at an incident angle of 0 °. It is the ratio (percentage) of transmitted light that deviates by 0.044 rad (2.5 °) or more.
The reflectance is the sum of the regular reflectance and the diffuse reflectance on the first surface (or the second surface), and is equivalent to the total light reflectance. However, it does not include those greatly deviated from the incident site or emitted from the end of the member.
The diffuse reflectance is obtained from regular reflection light reflected on the first surface side (or the second surface side) with respect to incident light incident at an incident angle of 0 ° from the first surface side (or the second surface side). It is the ratio (percentage) of reflected light that deviates by 0.044 rad (2.5 °) or more. When measuring the diffuse reflectance, light does not enter from the second surface side (or first surface side) opposite to the first surface side (or second surface side) to be measured. Put a black curtain on the other side.
The transmittance, reflectance, diffuse reflectance, and refractive index are values measured at room temperature using d-line (wavelength 589 nm) of a sodium lamp.
The forward haze is transmitted from the first surface side to the second surface side, or transmitted light transmitted from the second surface side to the first surface side by forward scattering. This is the percentage of transmitted light deviating by 044 rad (2.5 °) or more. That is, it is a normal haze measured by the method described in JIS K 7136: 2000 (ISO 14782: 1999).
The back haze means a percentage of the reflected light that is reflected on the first surface or the second surface and that is 0.044 rad (2.5 °) or more away from the regular reflected light due to scattering.
The arithmetic average roughness (Ra) is an arithmetic average roughness measured based on JIS B 0601: 2013 (ISO 4287: 1997, Amd. 1: 2009). The reference length lr (cut-off value λc) for the roughness curve was 0.8 mm.

[First embodiment]
The 1st aspect of the partition system of this invention is a partition system provided with the reflection-scattering type | mold transparent partition panel, and the light source installed in the 1st surface side of the partition panel.

FIG. 1 is a schematic configuration diagram showing an example of a first aspect of the partition system of the present invention.
The partition system is installed in a space on the second surface B side of the partition panel 1, the reflection / scattering partition panel 1, the first light source 101 installed in the space on the first surface A side of the partition panel 1. The second light source 102 and an installation member (not shown) for installing the partition panel 1 in the internal space of the building are provided.

<Reflection / scattering partition panel>
The reflection / scattering type partition panel is a partition panel having a first surface and a second surface opposite to the first surface, so that a scene on the first surface side can be visually recognized by an observer on the second surface side. A partition panel that transmits, transmits the scene on the second surface side so as to be visible to the viewer on the first surface side, and reflects a part of the light emitted from the light source as scattered light on the same side as the light source is there.

FIG. 1 is a layer configuration diagram showing an example of a reflection / scattering partition panel.
In the partition panel 1, a light scattering sheet 30 is disposed between a first transparent substrate 10 and a second transparent substrate 20.
The first transparent substrate 10 and the light scattering sheet 30 are bonded by the adhesive layer 12, and the second transparent substrate 20 and the light scattering sheet 30 are bonded by the adhesive layer 22.

(Transparent substrate)
Examples of the material of the first transparent substrate 10 and the second transparent substrate 20 (hereinafter collectively referred to as a transparent substrate) include glass and transparent resin. The material of each transparent substrate may be the same or different.

  Examples of the glass constituting the transparent substrate include soda lime glass, alkali-free glass, borosilicate glass, and aluminosilicate glass. The transparent substrate made of glass may be subjected to chemical strengthening, physical strengthening, hard coating or the like in order to improve durability.

  Examples of the transparent resin constituting the transparent substrate include polycarbonate, polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), triacetyl cellulose, cycloolefin polymer, polymethyl methacrylate, etc. From the viewpoint of weather resistance and transparency, polycarbonate Polyesters and cycloolefin polymers are preferred.

As the transparent substrate, those having no birefringence are preferable.
The thickness of a transparent base material should just be the thickness by which durability as a base material is maintained. The thickness of the transparent substrate may be, for example, 0.01 mm or more, 0.05 mm or more, and 0.1 mm or more. Further, the thickness of the transparent substrate may be, for example, 10 mm or less, 5 mm or less, 0.5 mm or less, 0.3 mm or less, and 0.15 mm or less. It's okay.

(Adhesive layer)
Examples of materials for the adhesive layer 12 and the adhesive layer 22 (hereinafter collectively referred to as an adhesive layer) include ethylene-vinyl acetate copolymer, polyvinyl butyral, pressure-sensitive adhesive (acrylic pressure-sensitive adhesive, etc.), and photocurable resin composition. , Thermosetting resin compositions, thermoplastic resin compositions, and the like. The material of each adhesive layer may be the same or different.

  Examples of the thermoplastic resin contained in the thermoplastic resin composition include plasticized polyvinyl acetal, plasticized polyvinyl chloride, saturated polyester, plasticized saturated polyester, polyurethane, plasticized polyurethane, ethylene-vinyl acetate copolymer, ethylene -Ethyl acrylate copolymer etc. are mentioned.

  The thickness of the adhesive layer is not particularly limited as long as the function as the adhesive layer is maintained. For example, 0.01 to 1.5 mm is preferable, and 0.05 to 1 mm is more preferable.

(Light scattering sheet)
The light scattering sheet 30 includes a first transparent film 31; a first transparent layer 32 provided on the surface of the first transparent film 31 and having an irregular uneven structure on the surface; and a first transparent layer 32. A reflective film 33 that transmits a part of incident light formed along the surface of the concave-convex structure side; and a first transparent layer 32 having a refractive index that is provided so as to cover the surface of the reflective film 33. A second transparent layer 34 having the same refractive index as that of the second transparent layer 34; and a second transparent film 35 provided on the surface of the second transparent layer 34.

(Transparent film)
The first transparent film 31 and the second transparent film 35 (hereinafter collectively referred to as a transparent film) may be a transparent resin film or a thin glass film. The material of each transparent film may be the same or different.

  Examples of the transparent resin constituting the transparent resin film include polycarbonate, polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), triacetyl cellulose, cycloolefin polymer, polymethyl methacrylate, and the like.

  The thickness of the transparent film is preferably such that a roll-to-roll process can be applied, for example, 0.01 to 0.5 mm is preferable, 0.05 to 0.3 mm is more preferable, and 0.2 mm or less is more preferable.

(Transparent layer)
The first transparent layer 32 and the second transparent layer 34 (hereinafter also collectively referred to as a transparent layer) are preferably transparent resin layers. The material of each transparent layer may be the same or different, and the same is preferable.

  The transparent resin constituting the transparent resin layer is preferably a cured product of a photocurable resin (such as an acrylic resin or an epoxy resin), a cured product of a thermosetting resin, or a thermoplastic resin. The yellow index of the transparent resin constituting the transparent resin layer is preferably 10 or less, more preferably 5 or less, from the viewpoint of maintaining the transparency of the partition panel.

The thickness of the transparent layer (excluding the portion where the concavo-convex structure is formed) may be any thickness that can be easily formed by a roll-to-roll process, and is preferably 0.5 to 50 μm, for example.
The transmittance of the transparent layer is preferably 50 to 100%, more preferably 75 to 100%, and still more preferably 90 to 100%.

The arithmetic average roughness Ra of the irregular concavo-convex structure formed on the surface of the first transparent layer 32 is preferably 0.01 to 20 μm, and more preferably 0.05 to 10 μm. When the arithmetic average roughness Ra is within this range, the viewing angle of the scattered light is wide, the scattered light can be visually recognized without directly viewing the regular reflected light, and the graininess due to the concavo-convex structure is suppressed. When the arithmetic average roughness Ra is 10 μm or less, it is more preferable that the concave-convex structure does not get in the way when a scene on the other side of the partition panel 1 is viewed.
Further, from the viewpoint of transparency, the refractive index of the first transparent layer and the refractive index of the second transparent layer are substantially the same. Specifically, since the difference Δn between the refractive index of the first transparent layer and the refractive index of the second transparent layer is preferably Δn × Ra / 0.59 ≦ 1.0, Δn is ± 0.05. Is preferably within ± 0.02, more preferably within ± 0.02, and even more preferably within ± 0.01. The left side shows the optical path difference in the vicinity of the d-line, which is a representative wavelength of visible light, and indicates that the scattering of transmitted light can be suppressed to an appropriate amount by being within one wavelength. Yes.

(Reflective film)
The reflection film 33 may be any film that transmits part of the light incident on the reflection film 33 and reflects the other part. Examples of the reflective film 33 include a metal film, a semiconductor film, a dielectric single layer film, a dielectric multilayer film, and combinations thereof.

Examples of the metal constituting the metal film and the semiconductor film include aluminum, silver, nickel, chromium, tungsten, silicon, and the like. Aluminum, silver, or an alloy containing them as a main component is preferable.
Examples of the dielectric constituting the dielectric film include metal oxides and metal nitrides.
The reflective film 33 preferably has a metal thin film or a film structure in which an oxide film, a metal thin film, and an oxide film are laminated in this order.

The thickness of the reflective film 33 is preferably 1 to 100 nm from the viewpoint that it can be utilized without disturbing the function of the irregular uneven structure formed on the surface of the first transparent layer 32 by the arithmetic average roughness Ra. 4-25 nm is more preferable.
The reflectance of the reflective film 33 is preferably 5% or more, more preferably 15% or more, and still more preferably 30% or more as a range in which sufficient luminance can be obtained.

(Method for producing light scattering sheet)
An example of a method for manufacturing the light scattering sheet 30 will be described with reference to FIG.

  As shown in FIG. 2 (a), a mold 61 in which an irregular concavo-convex structure is formed on the surface by applying a photocurable resin 36 to the surface of the first transparent film 31, and the concavo-convex structure is photocurable. The photo-curing resin 36 is overlaid so as to be in contact with the resin 36.

  Light (ultraviolet light or the like) is irradiated from the first transparent film 31 side to cure the photocurable resin 36 to form the first transparent layer 32 in which the irregular uneven structure of the mold 61 is transferred to the surface. After that, the mold 61 is peeled off as shown in FIG.

  As shown in FIG. 2C, a metal is physically vapor-deposited on the surface of the first transparent layer 32 to form a reflective film 33 made of a metal thin film.

As shown in FIG. 2D, a photocurable resin 37 is applied to the surface of the reflective film 33, and the second transparent film 35 is overlaid on the photocurable resin 37.
By irradiating light (ultraviolet rays or the like) from the first transparent film 41 side or the second transparent film 35 side and curing the photo-curable resin 37 to form the second transparent layer 34, light The scattering sheet 30 is obtained.

Examples of the mold 61 include a resin film, a metal plate, and the like on which an irregular uneven structure is formed on the surface. Examples of the resin film having an irregular concavo-convex structure formed on the surface include a resin film containing fine particles and a resin film that has been sandblasted.
Examples of the photocurable resin coating method include a die coating method, a blade coating method, a gravure coating method, a spin coating method, an ink jet method, and a spray coating method.
Examples of physical vapor deposition include vacuum vapor deposition and sputtering.

(Optical characteristics of reflection / scattering partition panel)
The transmittance of the partition panel 1 is 1% or more, preferably 5% or more, more preferably 10% or more, and further preferably 15% or more. If the transmittance of the partition panel 1 is equal to or higher than the lower limit value, the visibility of the sight seen beyond the partition panel 1 when viewed from the observer side is good.
The transmittance of the partition panel 1 is preferably 85% or less, more preferably 75% or less, and even more preferably 70% or less. The transmittance of the partition panel 1 can be changed by changing the thickness of the reflective film 33 or the type of film. It is preferable that the transmittance of the partition panel 1 is equal to or lower than the upper limit value and that the incident light quantity that is 10% or more of the reflectance is absorbed, since the transparency is further improved.

The diffuse reflectance of the partition panel 1 is 1% or more, preferably 5% or more, more preferably 10% or more, and further preferably 20% or more. If the diffuse reflectance of the partition panel 1 is equal to or higher than the lower limit value, when the light is emitted from the light source to the partition panel 1, the light source side observer cannot see the scene on the other side of the partition panel 1. be able to.
The diffuse reflectance of the partition panel 1 is preferably 90% or less, and more preferably 80% or less. If the diffuse reflectance of the partition panel 1 is less than or equal to the above upper limit value, the visibility of the scene seen from the other side of the partition panel 1 when viewed from the viewer side is further improved. The diffuse reflectance of the partition panel 1 can be changed by changing the thickness of the reflective film 33 and the type of film. The diffuse reflectance can also be changed by changing the uneven structure of the first transparent layer 32. In the case of the same film, when the average aspect ratio of the concavo-convex structure is increased, the diffuse reflectance is increased.

  The rear haze of the partition panel 1 is preferably 10% or more, more preferably 20% or more, further preferably 30% or more, and further preferably 50% or more. When the rear haze of the partition panel 1 is equal to or greater than the lower limit value, when the light is emitted from the light source to the partition panel 1, the light source side observer cannot see the scene on the other side of the partition panel 1 more visually. be able to.

The forward haze of the partition panel 1 is 50% or less, preferably 30% or less, more preferably 20% or less, and still more preferably 10% or less. If the front haze of the partition panel 1 is not more than the above upper limit value, the visibility of the scene seen from the other side of the partition panel 1 when viewed from the observer side is good.
The lower limit value of the front haze of the partition panel 1 is 0%.
The forward haze changes as the uneven structure of the first transparent layer 32 changes. In the case of the same film, increasing the average aspect ratio of the concavo-convex structure increases the forward haze. Further, when the thickness of the reflective film 33 is increased, the forward haze is increased. Further, when the film thickness and the film quality uniformity of the reflective film 33 are lowered, the forward haze increases. Further, when the film type of the reflective film 33 is changed to reduce the transmittance while maintaining the same reflectance, the forward haze is reduced. Further, when the refractive index difference between the first transparent layer 32 and the second transparent layer 34 increases, the forward haze increases. Further, if the extinction coefficient of the portion made up of the reflective film 33 and the member on the transmission side of the reflective film 33 is increased with respect to the incident direction when measuring the forward haze, the forward haze is reduced.

  The refractive index difference between adjacent layers (excluding the reflective film) in the partition panel 1 is preferably within 0.2 from the viewpoint that the reflectance at each layer interface is suppressed to within 0.5%. From the point that the reflectance becomes about 0.1%, it is more preferably within 0.1.

<Light source, lighting>
The 1st light source 101 should just irradiate light stronger than the illumination 201 installed in order to brighten the space by the side of the 1st surface A of the partition panel 1. As shown in FIG.
The 2nd light source 102 should just irradiate light stronger than the illumination 202 installed in order to brighten the space by the side of the 2nd surface B of the partition panel 1. As shown in FIG.

As the first light source 101 and the second light source 102 (hereinafter collectively referred to as a light source), a light source having a total luminous flux of 500 lumens or more is preferable, a light source having a total luminous flux of 1000 lumens or more is more preferable, and a total luminous flux is A light source of 3000 lumens or more is more preferable.
Examples of the light source include a projector (search light, flood light, spot light, etc.), a projector, an illumination device for indirect illumination, and the like.

As the light source, a projector is preferable from an inexpensive point of view.
As the light source, a projector is preferable from the viewpoint that rectangular light can be irradiated in accordance with the shape of the partition panel 1 and that information, a picture, and the like can be displayed on the partition panel 1 by projecting video light onto the partition panel 1. , Image light can be projected from a close distance of 10 to 90 cm, space can be saved in the partition system, and image light can be projected from a high incident angle. A short focus projector is more preferable because it is difficult for a person to cross the space.

  The horizontal distance from the light source to the partition panel 1 is preferably 5 to 0.1 m from the viewpoint that space saving of the partition system can be achieved and that it is difficult for a person to cross the light source and the partition panel 1. -0.2m is more preferable, and 1-0.3m is further more preferable.

As the illumination 201 and the illumination 202 (hereinafter collectively referred to as illumination), illumination with a total luminous flux of 10,000 lumens or less is preferable, illumination with a total luminous flux of 5000 lumens or less is more preferable, and illumination with a total luminous flux of 1000 lumens or less. Further preferred.
Illumination includes fluorescent lamps, incandescent bulbs, LED bulbs, organic EL lighting, and the like.
It is preferable that the horizontal distance from the illumination to the partition panel 1 is longer than the horizontal distance from the light source to the partition panel 1.

<Switching between fluoroscopy and non-fluoroscopy>
Hereinafter, in the first aspect of the partition system, switching between a state where the observer can visually recognize the scene beyond the partition panel and a state where the observer cannot visually recognize the scene beyond the partition panel (hereinafter referred to as fluoroscopy / non-display). (Also referred to as perspective switching).

  As shown in FIG. 1, when light is not irradiated to the partition panel 1 from a light source, the 1st surface produced by having illuminated the space by the side of the 1st surface A of the partition panel 1 with the light I1 irradiated from the illumination 201 is shown. After the light S1 of the scene on the surface A side is incident on the partition panel 1 from the first surface A, a part of the light S1 is scattered in the reflective film 33 and the rest is transmitted. Thereby, the observer Y on the second surface B side can visually recognize the scene on the first surface A side. Similarly, the light S2 of the scene on the second surface B side generated by illuminating the space on the second surface B side of the partition panel 1 with the light I2 emitted from the illumination 202 is partitioned from the second surface B. After entering the panel 1, a part of the light is scattered in the reflective film 33 and the rest is transmitted. Thereby, the observer X on the first surface A side can visually recognize the scene on the second surface B side.

  As shown in FIG. 3, when light is emitted from the first light source 101 to the partition panel 1 and light is not emitted from the second light source 102 to the partition panel 1, the partition panel 1 is irradiated from the first light source 101. A part of the light L1 incident from the first surface A is scattered by the reflective film 33, so that it is visually recognized as scattered light D1 by the observer X on the same side as the first light source 101. At this time, since the light S2 of the scene on the second surface B side transmitted through the partition panel 1 is weaker than the scattered light D1, the observer X on the first surface A side is on the second surface B side. I cannot see the scene. On the other hand, since the scattered light D1 is not visually recognized by the observer Y on the second surface B side, the observer Y on the second surface B side can visually recognize the scene on the first surface A side.

  As shown in FIG. 4, when light is emitted from the second light source 102 to the partition panel 1 and no light is emitted from the first light source 101 to the partition panel 1, the partition panel 1 is irradiated from the second light source 102. Part of the light L2 incident from the second surface B is scattered by the reflective film 33, and is visually recognized as scattered light D2 by the observer Y on the same side as the second light source 102. At this time, since the light S1 of the scene on the first surface A side transmitted through the partition panel 1 is weaker than the scattered light D2, the observer Y on the second surface B side is on the first surface A side. I cannot see the scene. On the other hand, since the scattered light D2 is not visually recognized by the observer X on the first surface A side, the observer X on the first surface A side can visually recognize the scene on the second surface B side.

  As shown in FIG. 5, when light is emitted from both light sources to the partition panel 1, a part of the light L1 irradiated from the first light source 101 and incident from the first surface A of the partition panel 1 is reflected film. By being scattered at 33, it is visually recognized as scattered light D1 by the observer X on the same side as the first light source 101. At this time, since the light S2 of the scene on the second surface B side transmitted through the partition panel 1 is weaker than the scattered light D1, the observer X on the first surface A side is on the second surface B side. I cannot see the scene. Similarly, a part of the light L2 irradiated from the second light source 102 and incident from the second surface B of the partition panel 1 is scattered on the reflection film 33, and thus is observed on the same side as the second light source 102. It is visually recognized by the person Y as scattered light D2. At this time, since the light S1 of the scene on the first surface A side transmitted through the partition panel 1 is weaker than the scattered light D2, the observer Y on the second surface B side is on the first surface A side. I cannot see the scene.

  The basic principle of switching between see-through and non-perspective in the partition system is to make the brightness of the viewer who does not want to see through the scene behind the partition panel brighter than the brightness of the viewer who wants to see through. .

From the viewpoint that the viewer X on the first surface A side cannot reliably see the scene on the second surface B side, the total luminous flux Φ _L1 of the first light source 101 and the illumination on the second surface B side are the most. lighting 202 closer to partition panel 1 (i.e., lighting most affect partition panel 1) and the total luminous flux [Phi _I2 of the non-diffuse transmittance T ₀ of the partition panel 1, satisfy the relationship of the following formula (1) It is preferable that the relationship of the following formula (1-1) is satisfied. The following expression means that the first light source 101 is sufficiently brighter than the illumination 202 on the second surface B side through the partition panel 1, and by satisfying the following expression, the observer X can scatter light D1. Can be sufficiently visually recognized, and the light S2 of the scene on the second surface B side transmitted through the partition panel 1 cannot be sufficiently visually recognized.
_{Φ L1 ≧ Φ I2 × (T} 0/100) / 2 ··· (1)
_{Φ L1 ≧ Φ I2 × (T} 0/100) ··· (1-1)

Further, the total luminous flux [Phi _L1 and the total luminous flux [Phi _I2 and non diffuse transmittance _{T 0} and diffuse reflectance of partition panel 1 _{R d} preferably satisfy the relation of the following equation (1-2).
_{Φ L1 ≧ Φ I2 × ((} T 0/100) / R d) / 2 ··· (1-2)

Further, the total luminous flux Φ _L1 , the total luminous flux Φ _I2 , the non-diffuse transmittance T ₀ , the diffuse reflectance R _d , the horizontal distance Z ₀ from the partition panel 1 to the observer X, and the partition panel 1 to the second and horizontal distance Z ₁ to the illumination 202 closest to partition panel 1 of the illumination of the surface B side, it is preferable to satisfy the relation of the following formula (1-3).
_{Φ I2 ≦ Φ L1 × (R} d / (T 0/100)) × (1 + Z 1 / Z 0) 4 ··· (1-3)

From the viewpoint that the viewer Y on the second surface B side cannot reliably see the scene on the first surface A side, the total luminous flux Φ _L2 of the second light source 102 and the illumination on the first surface A side are the most. The total luminous flux Φ _{I1 of the} illumination 201 close to the partition panel 1 (that is, the illumination that most affects the partition panel 1) and the non-diffuse transmittance T _{0 of} the partition panel 1 satisfy the relationship of the following expression (2). It is preferable that the relationship of the following formula (2-1) is satisfied. The following expression means that the second light source 102 is sufficiently brighter than the illumination 201 on the first surface A side through the partition panel 1, and by satisfying the following expression, the observer Y can scatter light D2. And the light S1 of the scene on the first surface A side that has passed through the partition panel 1 cannot be sufficiently visually recognized.
_{Φ L2 ≧ Φ I1 × (T} 0/100) / 2 ··· (2)
_{Φ L2 ≧ Φ I1 × (T} 0/100) ··· (2-1)

Further, the total luminous flux [Phi _L2 and the total luminous flux [Phi _I1 and non diffuse transmittance _{T 0} and diffuse reflectance of partition panel 1 _{R d} preferably satisfy the relation of the following equation (2-2).
_{Φ L2 ≧ Φ I1 × ((} T 0/100) / R d) / 2 ··· (2-2)

Further, the total luminous flux [Phi _L2 and the total luminous flux [Phi _I1 and non diffuse transmittance T ₀ and diffuse reflectance R _d, and the horizontal distance Z ₂ from partition panel 1 to the viewer Y, from partition panel 1 first and horizontal distance Z ₃ to the illumination 201 closest to the partition panel 1 of the illumination of the surface a side, it is preferable to satisfy the relation of the following formula (2-3).
_{Φ I1 ≦ Φ L2 × (R} d / (T 0/100)) × (1 + Z 3 / Z 2) 4 ··· (2-3)

<Action mechanism>
In the first aspect of the partition system using the reflection / scattering partition panel described above, the transmittance of the partition panel is 1% or more and the forward haze is 50% or less. The visibility of the sight seen beyond the partition panel is good. In addition, since the diffuse reflectance of the partition panel is 1% or more, by irradiating the partition panel with light from the light source, it is possible to make the scene on the other side of the partition panel invisible to the observer on the light source side. it can. Moreover, when the light source is installed on the first surface side and the second surface side of the partition panel, the first surface side observer and the second surface side observer on the other side of the partition panel. It is possible to select an observer who cannot visually recognize the scene. Thus, according to the first aspect of the partition system, it is possible to freely switch between see-through and non-see-through depending on the presence or absence of light irradiation from the light source.
Moreover, in the 1st aspect of the partition system demonstrated above, since a light control sheet or an EL element is unnecessary, it is comparatively cheap.
Further, in the first aspect of the partition system described above, there is no need to provide a control device for driving and controlling the light control layer or the EL element in the partition panel. Few.
Moreover, in the first aspect of the partition system described above, it is not necessary to provide power for the partition panel and wiring for the operation of the partition panel, so that the partition panel installation work is relatively simple. Moreover, there are few restrictions on the installation location of the partition.

<Other embodiments>
In addition, the 1st aspect of the partition system of this invention is not limited to the partition system of FIG. In the following, the same components as those in the partition system in FIG.

In the first aspect of the partition system, it is sufficient that at least the first light source is installed as the light source, and the second light source may not be installed.
Further, a light absorbing member may be disposed on the second surface B side of the partition panel 1. The scattered light D2 emitted from the second light source 102 and generated in the reflective film 33 of the partition panel 1 is absorbed by the light absorbing member, and thus is not visually recognized by the observer Y on the second surface B side. Therefore, the viewer Y on the second surface B side can visually recognize the scene on the first surface A side, and the second light source 102 is installed even though the second light source 102 is installed. The situation is similar to the situation without. Instead of arranging the light absorbing member, the second transparent substrate 20 may contain a light absorbing material.

As shown in FIG. 6, the reflection / scattering partition panel may be a partition panel 1 a in which the first transparent base material 10 is omitted. Specific examples of the partition panel 1a include an example in which the second transparent substrate 20 is an existing partition panel or the like, that is, an example in which the light scattering sheet 30 is attached to an existing partition panel or the like.
Moreover, in the partition panel 1 in FIG. 1, the second transparent base material 20 may be omitted.
Moreover, in the multi-layer glass having two glass plates and a frame-like spacer interposed between the glass plates so that a gap is formed between the glass plates, on the inner surface of one glass plate, The light scattering sheet 30 may be attached.

As shown in FIG. 7, the reflection / scattering partition panel may be a partition panel 1b in which the first transparent substrate 10 and the second transparent substrate 20 are omitted, that is, the light scattering sheet 30 itself. The partition panel 1b can be attached to an existing partition panel or the like using an adhesive layer. Moreover, the partition panel 1b can be deformed and is suitable for forming a partition panel having a curved surface.
In the partition panel 1b of FIG. 7, the first transparent film 31 and the second transparent film 35 may be replaced with the first transparent substrate 10 and the second transparent substrate 20.

In the reflection / scattering partition panel, the uneven structure on the surface of the first transparent layer may be a regular uneven structure (such as a microlens array or a hologram). However, for the following reasons, the uneven structure on the surface of the first transparent layer is preferably an irregular uneven structure.
When a reflective film is formed on the surface of a regular concavo-convex structure, color unevenness occurs in a scene seen from the viewer side as viewed from the observer side due to light diffraction, and visibility is impaired. On the other hand, when a reflective film is formed on the surface of an irregular concavo-convex structure, light diffraction and spectroscopy hardly occur, and these problems hardly occur. For this reason, the phenomenon that the color changes depending on the direction and place where the partition panel is viewed and the direction of the incident light is suppressed, and the spectroscopic view of the scene seen beyond the partition panel is suppressed. As a result, it is possible to provide a property as a transparent screen that is excellent in visibility of the scene seen beyond the partition panel and color reproducibility of the scene and video and does not disturb the line of sight.

[Second embodiment]
The 2nd aspect of the partition system of this invention is a partition system provided with the transparent partition panel of a transmission scattering type, and the light source installed in the 1st surface side of the partition panel.

FIG. 8 is a schematic configuration diagram showing an example of a second aspect of the partition system of the present invention.
The partition system is installed in a transmission-scattering partition panel 2, a first light source 101 installed in a space on the first surface A side of the partition panel 2, and a space on the second surface B side of the partition panel 2. The second light source 102 and an installation member (not shown) for installing the partition panel 2 in the interior space of the building are provided.

<Transmission / scattering partition panel>
The transmission / scattering partition panel is a partition panel having a first surface and a second surface opposite to the first surface, so that a scene on the first surface side can be visually recognized by an observer on the second surface side. A partition panel that transmits, transmits the scene on the second surface side so as to be visible to the viewer on the first surface side, and transmits part of the light emitted from the light source as scattered light on the side opposite to the light source It is.

FIG. 8 is a layer configuration diagram showing an example of a transmission / scattering partition panel. In the following, the same components as those of the partition panel 1 in FIG.
In the partition panel 2, a light scattering sheet 40 is disposed between the first transparent substrate 10 and the second transparent substrate 20.
The first transparent substrate 10 and the light scattering sheet 40 are bonded by the adhesive layer 12, and the second transparent substrate 20 and the light scattering sheet 40 are bonded by the adhesive layer 22.

(Light scattering sheet)
The light scattering sheet 40 includes a first transparent film 41; a light scattering layer 49 provided on the surface of the first transparent film 41; and a second transparent film 45 provided on the surface of the light scattering layer 49. Have.

(Transparent film)
Examples of the first transparent film 41 and the second transparent film 45 (hereinafter collectively referred to as a transparent film) include those similar to the transparent film of the light scattering sheet 30 described above, and preferred embodiments are also the same. .

(Light scattering layer)
The light scattering layer 49 includes, for example, a transparent resin, a light scattering material, and, if necessary, a light absorbing material.
Examples of the transparent resin contained in the light scattering layer 49 include a cured product of a photocurable resin (acrylic resin, epoxy resin, etc.), a cured product of a thermosetting resin, and a thermoplastic resin.

  As light scattering material, fine particles of high refractive index material such as titanium oxide (refractive index: 2.5 to 2.7), zirconium oxide (refractive index: 2.4), aluminum oxide (refractive index: 1.76), etc. Fine particles of a low refractive index material such as porous silica (refractive index: 1.3 or lower), hollow silica (refractive index: 1.3 or lower), etc .; a resin material having a low refractive index with low compatibility with the transparent resin; crystal And a resin material having a thickness of 1 μm or less.

The concentration of the light scattering material is preferably from 0.01 to 5% by volume, more preferably from 0.05 to 1% by volume.
When the light scattering material is fine particles, the average particle diameter of the fine particles is preferably 0.05 to 1 μm, more preferably 0.15 to 0.8 μm. When the average particle diameter of the fine particles is approximately the same as or slightly smaller than the wavelength of the scattered light, the probability of being scattered forward increases, and the function of scattering incident light without refracting becomes stronger. As a result, the distortion of the scene seen beyond the partition panel 2 when viewed from the observer side is suppressed and the amount of light is not changed suddenly, so that the visibility of the scene is improved.

When the light scattering layer 49 includes a light absorbing material, a part of the light propagating as unnecessary stray light in the partition panel 2 can be absorbed, and the scattered light is reduced. Therefore, it is possible to suppress the phenomenon that the partition panel 2 appears cloudy. Further, the contrast of the scene seen from the other side of the partition panel 2 when viewed from the observer side is improved, and the visibility of the scene is also improved. In particular, when an environment of 100 lux or more is present in the observer's line of sight due to external light, the above-described effect is easily obtained.
Examples of the light absorbing material include carbon black and titanium black.
The concentration of the light absorbing material is preferably 0.01 to 5% by volume, more preferably 0.1 to 3% by volume.

  The thickness of the light scattering layer 49 is preferably 10 to 200 μm. When the thickness of the light scattering layer 49 is 10 μm or more, the light scattering effect is sufficiently exhibited. If the thickness of the light scattering layer 49 is 200 μm or less, it is easy to form the light scattering layer 49 by a roll-to-roll process.

(Optical characteristics of transmission / scattering partition panel)
The transmittance of the partition panel 2 is 1% or more, preferably 5% or more, more preferably 10% or more, and further preferably 35% or more. If the transmittance of the partition panel 2 is equal to or higher than the lower limit value, the visibility of the sight seen beyond the partition panel 2 when viewed from the observer side is good. The transmittance can be controlled by changing the concentration of the light scattering material of the light scattering layer 49 or changing the concentration of the light absorbing material.
The upper limit of the transmittance of the partition panel 2 is 100%. However, in order to improve the visibility of the scene seen from the other side of the partition panel 2 when viewed from the observer side on the light source side, it is 85% or less. Preferably, it is 75% or less, more preferably 70% or less.

The diffuse reflectance of the partition panel 2 is preferably less than 20%, more preferably 10% or less, further preferably 5% or less, and further preferably 2.5% or less. If the diffuse reflectance of the partition panel 2 is less than or equal to the above upper limit value, the visibility of the scene that is visible beyond the partition panel 2 when viewed from the observer side on the light source side when the light is emitted from the light source to the partition panel 2 Is good. The diffuse reflectance of the partition panel 2 is improved when the concentration of the light scattering material of the light scattering layer 49 is improved, and may be lowered or improved when the concentration of the light absorbing material is increased.
The lower limit of the diffuse reflectance of the partition panel 2 is 0.1%.

  The rear haze of the partition panel 2 is not particularly limited.

The forward haze of the partition panel 2 is 9% or more, preferably 12% or more, and more preferably 15% or more. If the front haze of the partition panel 2 is equal to or greater than the lower limit, when the light is emitted from the light source to the partition panel 2, the viewer on the opposite side of the light source can visually recognize the scene on the other side of the partition panel 2. Can be eliminated.
The forward haze of the partition panel 2 is 50% or less, more preferably 30% or less, and still more preferably 20% or less. If the forward haze of the partition panel 2 is not more than the above upper limit value, the visibility of the scene seen from the other side of the partition panel 2 when viewed from the observer side is good.
The forward haze of the partition panel 2 is improved when the concentration of the light scattering material of the light scattering layer 49 is improved, and when the concentration of the light absorbing material is increased, the refractive index of the light absorbing material and the size of the pigment in the case of the pigment are In some cases, it decreases, and in other cases it improves.

  The refractive index difference between adjacent layers in the partition panel 2 is preferably within 0.2, from the point that the reflectance at each layer interface is suppressed to within 0.5%, and the reflectance at each layer interface is about 0.1%. In view of the above, it is more preferably within 0.1.

<Light source, lighting>
As a light source, the thing similar to a 1st aspect is mentioned, A preferable aspect is also the same.
Illumination includes the same ones as in the first aspect, and the preferred aspects are also the same.

<Switching between fluoroscopy and non-fluoroscopy>
Hereinafter, the switching between fluoroscopic / non-fluoroscopic in the second aspect of the partition system will be described.

  As shown in FIG. 8, when the partition panel 2 is not irradiated with light from the light source, the first surface generated by the light I1 irradiated from the illumination 201 illuminating the space on the first surface A side of the partition panel 2 is used. The light S1 of the scene on the surface A side is incident on the partition panel 2 from the first surface A, and then partially scattered in the light scattering layer 49 and the rest is transmitted. Thereby, the observer Y on the second surface B side can visually recognize the scene on the first surface A side. Similarly, the light S2 of the scene on the second surface B side generated by illuminating the space on the second surface B side of the partition panel 2 with the light I2 emitted from the illumination 202 is partitioned from the second surface B. After entering the panel 2, a part of the light scattering layer 49 is scattered and the rest is transmitted. Thereby, the observer X on the first surface A side can visually recognize the scene on the second surface B side.

  As shown in FIG. 9, when light is emitted from the first light source 101 to the partition panel 2 and no light is emitted from the second light source 102 to the partition panel 2, the light is emitted from the first light source 101 and the partition panel 2. A part of the light L1 incident from the first surface A is scattered in the light scattering layer 49, so that it is visually recognized as scattered light D1 by the observer Y on the side opposite to the first light source 101. At this time, the light S1 of the scene on the first surface A side transmitted through the partition panel 2 is weaker than the scattered light D1, so that the observer Y on the second surface B side receives the first surface A side. I cannot see the scene. On the other hand, since the scattered light D1 is not visually recognized by the observer X on the first surface A side, the observer X on the first surface A side can visually recognize the scene on the second surface B side.

  As shown in FIG. 10, when light is emitted from the second light source 102 to the partition panel 2 and no light is emitted from the first light source 101 to the partition panel 2, the light is emitted from the second light source 102 and the partition panel 2. Part of the light L2 incident from the second surface B is scattered by the light scattering layer 49, so that it is visually recognized as scattered light D2 by the observer X on the side opposite to the second light source 102. At this time, since the light S2 of the scene on the second surface B side transmitted through the partition panel 2 is weaker than the scattered light D2, the observer X on the first surface A side receives the second surface B side. I cannot see the scene. On the other hand, since the scattered light D2 is not visually recognized by the observer Y on the second surface B side, the observer Y on the second surface B side can visually recognize the scene on the first surface A side.

  As shown in FIG. 11, when light is emitted from both light sources to the partition panel 2, a part of the light L <b> 1 irradiated from the first light source 101 and incident from the first surface A of the partition panel 2 is light scattered. By scattering in the layer 49, it is visually recognized as scattered light D1 by the observer Y on the opposite side to the first light source 101. At this time, the light S1 of the scene on the first surface A side transmitted through the partition panel 2 is weaker than the scattered light D1, so that the observer Y on the second surface B side receives the first surface A side. I cannot see the scene. Similarly, a part of the light L2 irradiated from the second light source 102 and incident from the second surface B of the partition panel 2 is scattered on the light scattering layer 49, so that the second light source 102 is opposite to the second light source 102. Is visually recognized as scattered light D2. At this time, since the light S2 of the scene on the second surface B side transmitted through the partition panel 2 is weaker than the scattered light D2, the observer X on the first surface A side receives the second surface B side. I cannot see the scene.

Since the viewer Y on the second surface B side cannot reliably see the scene on the first surface A side, it is the most of the total luminous flux Φ _L1 of the first light source 101 and the illumination on the first surface A side. lighting 201 close to partition panel 2 (i.e., lighting most affect partition panel 2) and the total luminous flux [Phi _I1 of, preferably satisfies the relation of the following formula (3), the following equation of (3-1) It is more preferable to satisfy the relationship. The following expression means that the first light source 101 is sufficiently brighter than the illumination 201 on the first surface A side, and by satisfying the following expression, the observer Y can sufficiently recognize the scattered light D1. At the same time, the light S1 of the scene on the first surface A side that has passed through the partition panel 2 cannot be sufficiently visually recognized.
Φ _L1 ≧ Φ _I1 / 10 (3)
Φ _L1 ≧ Φ _I1 / 5 (3-1)

Further, it is preferable that the total luminous flux Φ _L1 , the total luminous flux Φ _I1 , the non-diffusive transmittance T ₀ and the diffuse transmittance T _{d of the} partition panel 2 satisfy the relationship of the following expression (3-2).
Φ _L1 ≧ Φ _I1 × (T ₀ / T _d ) / 10 (3-2)

Further, the total luminous flux Φ _L1 , the total luminous flux Φ _I1 , the non-diffuse transmittance T ₀ , the diffuse transmittance T _d , the horizontal distance Z ₂ from the partition panel 1 to the observer Y, and the partition panel 1 to the first and horizontal distance Z ₃ to the illumination 201 closest to the partition panel 1 of the illumination of the surface a side, it is preferable to satisfy the relation of the following formula (3-3).
_{Φ I1 ≦ Φ L1 × T d} / T 0 × (1 + Z 3 / Z 2) 4 ··· (3-3)

From the viewpoint that the viewer X on the first surface A side cannot reliably see the scene on the second surface B side, the total luminous flux Φ _L2 of the second light source 102 and the illumination on the second surface B side are the most. lighting 202 close to partition panel 2 (i.e., lighting most affect partition panel 2) and the total luminous flux [Phi _I2 of, preferably satisfies the relation of the following formula (4), the following equation of (4-1) It is more preferable to satisfy the relationship. The following expression means that the second light source 102 is sufficiently brighter than the illumination 202 on the second surface B side, and by satisfying the following expression, the observer X can sufficiently recognize the scattered light D2. At the same time, the light S2 of the scene on the second surface B side that has passed through the partition panel 2 cannot be sufficiently visually recognized.
Φ _L2 ≧ Φ _I2 / 10 (4)
Φ _L2 ≧ Φ _I2 / 5 (4-1)

Further, the total luminous flux [Phi _L2 and the total luminous flux [Phi _I2 and the non-diffuse transmittance _{T 0} and the diffuse transmittance _{T d} of the partition panel 2, it is preferable to satisfy the relation of the following formula (4-2).
_{Φ L2 ≧ Φ I2 × (T} 0 / T d) / 10 ··· (4-2)

Further, the total luminous flux [Phi _L2 and the total luminous flux [Phi _I2 and non diffuse transmittance T ₀ and the diffuse transmittance T _d, the horizontal distance Z ₀ from the partition panel 1 to the viewer X, from partition panel 1 second and horizontal distance Z ₁ to the illumination 202 closest to partition panel 1 of the illumination of the surface B side, it is preferable to satisfy the relation of the following formula (4-3).
_{Φ I2 ≦ Φ L2 × T d} / T 0 × (1 + Z 1 / Z 0) 4 ··· (4-3)

<Action mechanism>
In the second aspect of the partition system using the transmission scattering type partition panel described above, the transmittance of the partition panel is 1% or more and the forward haze is 50% or less. The visibility of the sight seen beyond the partition panel is good. In addition, since the front haze of the partition panel is 9% or more, by irradiating the partition panel with light from the light source, it is impossible to visually recognize the scene on the other side of the partition panel from the observer on the opposite side to the light source. be able to. Moreover, when the light source is installed on the first surface side and the second surface side of the partition panel, the first surface side observer and the second surface side observer on the other side of the partition panel. It is possible to select an observer who cannot visually recognize the scene. As described above, according to the second aspect of the partition system, it is possible to freely switch between fluoroscopic / non-fluoroscopic by light irradiation from the light source.
Moreover, in the 2nd aspect of the partition system demonstrated above, since a light control sheet or an EL element is unnecessary, it is comparatively cheap.
Further, in the second aspect of the partition system described above, there is no need to provide a control device for driving and controlling the light control layer or the EL element in the partition panel. Few.
Moreover, in the second aspect of the partition system described above, it is not necessary to provide power for the partition panel and wiring for the operation of the partition panel, so the partition panel installation work is relatively simple. Moreover, there are few restrictions on the installation location of the partition.

<Other embodiments>
In addition, the 2nd aspect of the partition system of this invention is not limited to the partition system of FIG. In the following, the same components as those in the partition system in FIG.

  In the second aspect of the partition system, it is sufficient that at least the first light source is installed as the light source, and the second light source may not be installed.

The transmission / scattering partition panel may be a partition panel in which the first transparent substrate 10 is omitted in the partition panel 2 of FIG. 8. Specific examples of the partition panel include an example in which the second transparent substrate 20 is an existing partition panel or the like, that is, an example in which the light scattering sheet 40 is attached to an existing partition panel or the like.
Moreover, in the partition panel 2 of FIG. 8, the 2nd transparent base material 20 may be abbreviate | omitted.
Moreover, in the multi-layer glass having two glass plates and a frame-like spacer interposed between the glass plates so that a gap is formed between the glass plates, on the inner surface of one glass plate, The light scattering sheet 40 may be attached.

The transmission / scattering partition panel may be the partition panel in which the first transparent base material 10 and the second transparent base material 20 are omitted in the partition panel 2 of FIG. 8, that is, the light scattering sheet 40 itself. The partition panel can be attached to an existing partition panel or the like using an adhesive layer. Further, the partition panel can be deformed and is suitable for forming a partition panel having a curved surface.
In the partition panel, the first transparent film 41 and the second transparent film 45 may be replaced with the first transparent substrate 10 and the second transparent substrate 20.

The light scattering layer is not limited to the light scattering layer 49 in FIG. 8, and is a light scattering layer including a transparent layer and a plurality of light scattering portions arranged in parallel with each other at a predetermined interval inside the transparent layer. There may be. FIG. 12 is a layer configuration diagram showing another example of a transmission / scattering partition panel.
In the partition panel 2 c, a light scattering sheet 40 c is disposed between the first transparent base material 10 and the second transparent base material 20.
The first transparent substrate 10 and the light scattering sheet 40 c are bonded by the adhesive layer 12, and the second transparent substrate 20 and the light scattering sheet 40 c are bonded by the adhesive layer 22.

  The light scattering sheet 40c includes: a first transparent film 41; a transparent layer 42 provided on the surface of the first transparent film 41; and the inside of the transparent layer 42 arranged in parallel with each other at a predetermined interval. A plurality of light scattering portions 43 extending in the plane direction and having a right-angled cross section in a direction perpendicular to the longitudinal direction; and a second transparent film 45 provided on the surface of the transparent layer 42. Hereinafter, a structure in which a plurality of light scattering portions 43 extending in a one-dimensional direction in a stripe shape is sometimes described as a louver structure.

  The light scattering portion 43 includes, for example, a transparent resin, a light scattering material, and, if necessary, a light absorbing material. As the light scattering material and the light absorbing material, the same materials as described above can be used.

  The interval between the light scattering portions 43 (the distance between the centers of the adjacent light scattering portions 43) is preferably 10 to 250 μm, and more preferably 10 to 100 μm. If the interval between the light scattering portions 43 is 10 μm or more, the light scattering portions 43 are easily formed. If the space | interval of the light-scattering part 43 is 250 micrometers or less, the light-scattering part 43 will be hard to visually recognize.

  The width of the light scattering portion 43 (the surface direction of the light scattering sheet 40c and the direction perpendicular to the longitudinal direction of the light scattering portion 43) is preferably 10 to 70% of the interval of the light scattering portions 43, and more preferably 25 to 50%. . If the width of the light scattering portion 43 is 10% or more of the interval between the light scattering portions 43, the light scattering portion 43 is easily formed. When the width of the light scattering portion 43 is 70% or less of the interval between the light scattering portions 43, the transmittance of the light scattering portion 43 and the visibility of the scene seen beyond the partition panel 2 when viewed from the observer side are improved. To do.

  The ratio of the height of the light scattering portion 43 to the width of the light scattering portion 43 (the direction orthogonal to the surface direction of the light scattering sheet 40c), that is, the aspect ratio, is obliquely incident while maintaining the straight light transmittance of the scene. 1 or more is preferable, 1.5 or more is more preferable, and 2 or more is more preferable from the point which scatters the light from a light source with high gain.

  The shape of the cross section orthogonal to the longitudinal direction of the light scattering portion 43 is not limited to a right triangle as shown in the illustrated example, and may be another triangle, trapezoid, bell shape, or the like. Further, it may have a two-dimensional stripe structure, and may have a pillar structure or the like instead of a stripe.

[Third Aspect]
The 3rd aspect of the partition system of this invention is a partition system provided with the reflective partition panel of a reflection and permeation | transmission bidirectional scattering type, and the light source installed in the 1st surface side of the partition panel.

FIG. 13: is a schematic block diagram which shows an example of the 3rd aspect of the partition system of this invention.
The partition system includes a reflection / transmission bidirectional scattering type partition panel 3, a first light source 101 installed in the space on the first surface A side of the partition panel 3, and the partition panel 3 installed in the interior space of the building. And an installation member (not shown).

<Reflective and transmissive bidirectional scattering type partition panel>
The reflection / transmission bi-directional scattering type partition panel is a partition panel having a first surface and a second surface opposite to the first surface, and the scene on the first surface side is given to the observer on the second surface side. The second surface side view is transmitted in a visible manner to the first surface side observer, and a part of the light emitted from the light source is reflected to the light source side as scattered light; This is a partition panel that transmits part of the light emitted from the light source as scattered light to the side opposite to the light source.

FIG. 13 is a layer configuration diagram showing an example of a transmission / scattering partition panel. Hereinafter, components having the same configuration as the partition panel 1 in FIG. 1 or the partition panel 2 in FIG.
In the partition panel 3, a light scattering sheet 50 is disposed between the first transparent substrate 10 and the second transparent substrate 20.
The first transparent substrate 10 and the light scattering sheet 50 are bonded by the adhesive layer 12, and the second transparent substrate 20 and the light scattering sheet 50 are bonded by the adhesive layer 22.

(Light scattering sheet)
The light scattering sheet 50 includes: a first transparent film 51; a first transparent layer 52 provided on the surface of the first transparent film 51 and having an irregular uneven structure on the surface; and the first transparent layer 52 A reflection film 53 that is formed so as to be along the surface of the concavo-convex structure side, and transmits a part of incident light; and a refractive index of the first transparent layer 52 provided so as to cover the surface of the reflection film 53. A second transparent layer 54 having the same refractive index as the above; a light scattering layer 59 provided on the surface of the second transparent layer 54; and a second transparent film 55 provided on the surface of the light scattering layer 59. .

(Transparent film)
Examples of the first transparent film 51 and the second transparent film 55 (hereinafter, collectively referred to as a transparent film) include the same transparent films as those of the light scattering sheet 30 described above, and preferred embodiments are also the same. .

(Transparent layer)
Examples of the first transparent layer 52 and the second transparent layer 54 (hereinafter, collectively referred to as a transparent layer) include the same as the transparent layer of the light scattering sheet 30 described above, and preferred embodiments are also the same. .

(Reflective film)
As the reflective film 53, the same thing as the reflective film 33 of the light-scattering sheet 30 mentioned above is mentioned, A preferable aspect is also the same.

(Light scattering layer)
As the light-scattering layer 59, the thing similar to the light-scattering layer 49 of the light-scattering sheet 40 mentioned above is mentioned, A preferable aspect is also the same.

(Optical characteristics of reflective and transmissive bidirectional scattering type partition panels)
The transmittance of the partition panel 3 is 1% or more, preferably 5% or more, more preferably 10% or more, and further preferably 20% or more. If the transmittance of the partition panel 3 is equal to or higher than the lower limit value, the visibility of the sight seen beyond the partition panel 3 when viewed from the observer side is good.
The transmittance of the partition panel 3 is preferably 85% or less, more preferably 75% or less, and even more preferably 70% or less. It is preferable that the transmittance of the partition panel 3 is equal to or lower than the upper limit value and that the incident light quantity that is 10% or more of the reflectance is absorbed, since the transparency is further improved. The transmittance can be controlled by either one of the first mode and the second mode, or both methods.

The diffuse reflectance of the partition panel 3 is 1% or more, preferably 5% or more, more preferably 10% or more, and further preferably 20% or more. If the diffuse reflectance of the partition panel 3 is equal to or higher than the lower limit value, when the light is emitted from the light source to the partition panel 3, the light source side observer cannot see the scene behind the partition panel 3. be able to.
The diffuse reflectance of the partition panel 3 is preferably 90% or less, more preferably 80% or less, and further preferably 50% or less. If the diffuse reflectance of the partition panel 3 is equal to or less than the upper limit, the transparency when the partition panel 3 is not directly illuminated is further improved. The diffuse reflectance can be controlled by either one of the first mode and the second mode, or both methods.

The rear haze of the partition panel 3 is preferably 10% or more, more preferably 20% or more, further preferably 30% or more, and further preferably 50% or more. If the rear haze of the partition panel 3 is equal to or greater than the lower limit value, when the light is emitted from the light source to the partition panel 3, the scene on the other side of the partition panel 3 cannot be more visually recognized by the observer on the light source side. be able to.
The rear haze of the partition panel 3 is preferably 90% or less, and more preferably 80% or less. If the rear haze of the partition panel 3 is less than or equal to the above upper limit value, the visibility of the sight seen beyond the partition panel 3 when viewed from the observer side is even better. The backward haze can be controlled by the method of the first aspect or by controlling the concentration of the light diffusing material.

The forward haze of the partition panel 3 is 9% or more, preferably 12% or more, and more preferably 15% or more. If the front haze of the partition panel 3 is equal to or greater than the lower limit, when the light is emitted from the light source to the partition panel 3, the viewer on the opposite side of the light source can visually recognize the scene on the other side of the partition panel 3. Can be eliminated.
The forward haze of the partition panel 3 is 50% or less, and more preferably 30% or less. If the front haze of the partition panel 3 is not more than the above upper limit value, the visibility of the scene seen from the other side of the partition panel 3 when viewed from the observer side is good. The forward haze can be controlled by either one or both of the first aspect and the second aspect.

  The refractive index difference between adjacent layers (excluding the reflective film) in the partition panel 3 is preferably within 0.2 because the reflectance at each layer interface is suppressed to within 0.5%. From the point that the reflectance becomes about 0.1%, it is more preferably within 0.1.

<Light source, lighting>
As a light source, the thing similar to a 1st aspect is mentioned, A preferable aspect is also the same.
Illumination includes the same ones as in the first aspect, and the preferred aspects are also the same.

<Switching between fluoroscopy and non-fluoroscopy>
Hereinafter, switching between fluoroscopic / non-fluoroscopic in the third aspect of the partition system will be described.

  As shown in FIG. 13, when light is not emitted from the first light source 101 to the partition panel 3, the light I1 emitted from the illumination 201 illuminates the space on the first surface A side of the partition panel 3. Further, after the light S1 of the scene on the first surface A side is incident on the partition panel 3 from the first surface A, a part thereof is scattered in the reflection film 53 and the light scattering layer 59, and the rest is transmitted. Thereby, the observer Y on the second surface B side can visually recognize the scene on the first surface A side. Similarly, the light S2 of the scene on the second surface B side generated by illuminating the space on the second surface B side of the partition panel 3 with the light I2 emitted from the illumination 202 is partitioned from the second surface B. After entering the panel 3, a part of the light scattering layer 59 and the reflection film 53 is scattered and the rest is transmitted. Thereby, the observer X on the first surface A side can visually recognize the scene on the second surface B side.

As shown in FIG. 14, when light is emitted from the first light source 101 to the partition panel 3, a part of the light L <b> 1 irradiated from the first light source 101 and incident from the first surface A of the partition panel 3 is obtained. As a result of scattering in the reflective film 53, the light is visually recognized as scattered light D1 by the observer X on the same side as the first light source 101. At this time, since the light S2 of the scene on the second surface B side transmitted through the partition panel 3 is weaker than the scattered light D1, the observer X on the first surface A side is on the second surface B side. I cannot see the scene.
Further, a part of the light L1 transmitted through the reflective film 53 is scattered by the light scattering layer 59, so that it is visually recognized as scattered light D1 ′ by the observer Y on the opposite side to the first light source 101. At this time, since the light S1 of the scene on the first surface A side transmitted through the partition panel 3 is weaker than the scattered light D1 ′, the observer Y on the second surface B side receives the first surface A. The side view cannot be seen.

From the viewpoint that the viewer X on the first surface A side cannot reliably see the scene on the second surface B side, the total luminous flux Φ _L1 of the first light source 101 and the illumination on the second surface B side are the most. The total luminous flux Φ _{I2 of the} illumination 202 close to the partition panel 3 (that is, the illumination that most affects the partition panel 3) and the non-diffuse transmittance T _{0 of} the partition panel 3 satisfy the relationship of the following expression (1). It is preferable that the relationship of the following formula (1-1) is satisfied. The following equation means that the first light source 101 is sufficiently brighter than the illumination 202 on the second surface B side through the partition panel 3, and by satisfying the following equation, the observer X can scatter light D1. Can be sufficiently visually recognized, and the light S2 of the scene on the second surface B side transmitted through the partition panel 3 cannot be sufficiently visually recognized.
_{Φ L1 ≧ Φ I2 × (T} 0/100) / 2 ··· (1)
_{Φ L1 ≧ Φ I2 × (T} 0/100) ··· (1-1)

Further, the total luminous flux [Phi _L1 and the total luminous flux [Phi _I2 and non diffuse transmittance _{T 0} and diffuse reflectance of partition panel 1 _{R d} preferably satisfy the relation of the following equation (1-2).
_{Φ L1 ≧ Φ I2 × ((} T 0/100) / R d) / 2 ··· (1-2)

Further, the total luminous flux Φ _L1 , the total luminous flux Φ _I2 , the non-diffuse transmittance T ₀ , the diffuse reflectance R _d , the horizontal distance Z ₀ from the partition panel 1 to the observer X, and the partition panel 1 to the second and horizontal distance Z ₁ to the illumination 202 closest to partition panel 1 of the illumination of the surface B side, it is preferable to satisfy the relation of the following formula (1-3).
_{Φ I2 ≦ Φ L1 × (R} d / (T 0/100)) × (1 + Z 1 / Z 0) 4 ··· (1-3)

Since the viewer Y on the second surface B side cannot reliably see the scene on the first surface A side, it is the most of the total luminous flux Φ _L1 of the first light source 101 and the illumination on the first surface A side. lighting 201 Nearby partition panel 3 (i.e., lighting most affect partition panel 3) and the total luminous flux [Phi _I1 of, preferably satisfies the relation of the following formula (3), the following equation of (3-1) It is more preferable to satisfy the relationship. The following expression means that the first light source 101 is sufficiently brighter than the illumination 201 on the first surface A side, and by satisfying the following expression, the observer Y can sufficiently recognize the scattered light D1 ′. In addition, the light S1 of the scene on the first surface A side that has passed through the partition panel 3 cannot be sufficiently visually recognized.
Φ _L1 ≧ Φ _I1 / 10 (3)
Φ _L1 ≧ Φ _I1 / 5 (3-1)

Further, it is preferable that the total luminous flux Φ _L1 , the total luminous flux Φ _I1 , the non-diffusive transmittance T ₀ and the diffuse transmittance T _{d of the} partition panel 2 satisfy the relationship of the following expression (3-2).
Φ _L1 ≧ Φ _I1 × (T ₀ / T _d ) / 10 (3-2)

Further, the total luminous flux Φ _L1 , the total luminous flux Φ _I1 , the non-diffuse transmittance T ₀ , the diffuse transmittance T _d , the horizontal distance Z ₂ from the partition panel 1 to the observer Y, and the partition panel 1 to the first and horizontal distance Z ₃ to the illumination 201 closest to the partition panel 1 of the illumination of the surface a side, it is preferable to satisfy the relation of the following formula (3-3).
_{Φ I1 ≦ Φ L1 × T d} / T 0 × (1 + Z 3 / Z 2) 4 ··· (3-3)

<Action mechanism>
In the third aspect of the partition system using the reflective and transmissive bidirectional scattering type partition panel described above, the transmittance of the partition panel is 1% or more, and the forward haze is 50% or less. The visibility of the sight seen beyond the partition panel when viewed from the person side is good. In addition, since the diffuse reflectance of the partition panel is 1% or more, by irradiating the partition panel with light from the light source, it is possible to make the scene on the other side of the partition panel invisible to the observer on the light source side. it can. In addition, since the front haze of the partition panel is 9% or more, by irradiating the partition panel with light from the light source, it is impossible to visually recognize the scene on the other side of the partition panel from the observer on the opposite side to the light source. be able to. As described above, according to the third aspect of the partition system, it is possible to switch between fluoroscopic / non-fluoroscopic by light irradiation from the light source.
Moreover, in the 3rd aspect of the partition system demonstrated above, since a light control sheet or an EL element is unnecessary, it is comparatively cheap.
Further, in the third aspect of the partition system described above, there is no need to provide a control device for driving and controlling the light control layer or the EL element in the partition panel. Few.
Further, in the third aspect of the partition system described above, it is not necessary to provide power supply to the partition panel and wiring for the operation of the partition panel, so the installation work of the partition panel is relatively simple. Moreover, there are few restrictions on the installation location of the partition.

<Other embodiments>
In addition, the 3rd aspect of the partition system of this invention is not limited to the partition system of FIG. In the following, the same components as those in the partition system in FIG.

The reflective and transmissive bidirectional scattering type partition panel may be the one in which the first transparent base material 10 is omitted in the partition panel 3 of FIG. 13. Specific examples of the partition panel include an example in which the second transparent substrate 20 is an existing partition panel or the like, that is, an example in which the light scattering sheet 50 is attached to an existing partition panel or the like.
Further, in the partition panel 3 in FIG. 13, the second transparent base material 20 may be omitted.
Moreover, in the multi-layer glass having two glass plates and a frame-like spacer interposed between the glass plates so that a gap is formed between the glass plates, on the inner surface of one glass plate, The light scattering sheet 50 may be attached.

The reflection / transmission bidirectional scattering type partition panel may be the partition panel 3 of FIG. 13 in which the first transparent base material 10 and the second transparent base material 20 are omitted, that is, the light scattering sheet 50 itself. . The partition panel can be attached to an existing partition panel or the like using an adhesive layer. Further, the partition panel can be deformed and is suitable for forming a partition panel having a curved surface.
Moreover, in the partition panel 3 of FIG. 13, the first transparent film 41 and the second transparent film 45 may be omitted.

Another example of the reflection / transmission bidirectional scattering type partition panel is shown below.
The other partition panel of the reflection / transmission bidirectional scattering type is such that another light scattering sheet of the reflection / transmission bidirectional scattering type is disposed between the first transparent substrate and the second transparent substrate. is there.
The first transparent substrate and the light scattering sheet are bonded by an adhesive layer, and the second transparent substrate and the light scattering sheet are bonded by an adhesive layer.

  The other light scattering sheet of the reflection / transmission bidirectional scattering type includes a first transparent film; a flat reflection film that is formed on the surface of the first transparent film and transmits a part of incident light; A light scattering layer provided on the surface of the light scattering layer; and a second transparent film provided on the surface of the light scattering layer.

Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.
Examples 1, 2, and 3 are examples, and examples 4 and 5 are comparative examples.

(Scene visibility)
The observer X observed the first surface A of the partition panel from a distance of 3 m directly in front. The observer Y observed the second surface B of the partition panel from a distance of 3 m directly in front. The visibility of the scene seen from the side of the partition panel as viewed from each observer was evaluated according to the following criteria.
○: A scene seen from the side of the partition panel as viewed from the observer can be visually recognized.
X: The sight seen beyond the partition panel as viewed from the observer cannot be visually recognized.

(Example 1)
On the surface of a transparent polyethylene terephthalate (hereinafter referred to as PET) film (Toyobo Co., Ltd., Cosmo Shine (registered trademark) A4300, thickness: 100 μm), an ultraviolet curable resin (Osaka Gas Chemical Co., Ltd., Ogsol (registered trademark)) ) EA-F5003) A solution prepared by mixing 3 parts by mass of a photoinitiator (BASF, Irgacure (registered trademark) 907) with respect to 100 parts by mass was applied to a thickness of 10 μm by a die coating method.
A white PET film (Toray, E20, arithmetic average roughness Ra: 0.23 μm) with an irregular concavo-convex structure formed on its surface is placed on the surface of the UV curable resin so that the concavo-convex structure is in contact with the UV curable resin. Overlaid on top.

After irradiating 1000 mJ ultraviolet rays from the transparent PET film side to cure the ultraviolet curable resin to form the first transparent layer having the irregular uneven structure of the white PET film transferred to the surface, the white PET film Was peeled off.
Aluminum was physically vapor-deposited on the surface of the first transparent layer by a vacuum vapor deposition method to form a reflective film made of an aluminum thin film (thickness: 12 nm).

3 masses of photoinitiator (BASF, Irgacure (registered trademark) 907) with respect to 100 parts by mass of UV curable resin (Ossol (registered trademark) EA-F5003) manufactured on Osaka Gas Chemical Co., Ltd. The partially mixed solution was applied to a thickness of 10 μm by a die coating method, and a transparent PET film (thickness: 100 μm) was overlaid on the ultraviolet curable resin.
The light-scattering sheet of Example 1 was obtained by irradiating 1000 mJ of ultraviolet rays to cure the ultraviolet curable resin to form a second transparent layer.

  Soda lime glass plate (Matsunami Glass Co., Ltd., thickness: 3 mm), polyvinyl butyral (hereinafter referred to as PVB) film (Solutia Saflex RK11l, thickness: 375 μm), light scattering sheet of Example 1, PVB film ( Thickness: 375 μm) and soda lime glass plate (thickness: 3 mm) were laminated in this order, and vacuum thermocompression bonding was performed to obtain the reflection-scattering partition panel of Example 1. Table 1 shows the optical characteristics of the partition panel of Example 1.

As the first light source 101, a short focus projector (manufactured by RICOH, PJ WX4141NI, total luminous flux Φ _L1 : 3300 lumen) was prepared.
The horizontal distance from the first light source 101 to the partition panel 1 is such that the incident angle of light on the first surface A of the partition panel 1 is 26 degrees in the portion closest to the first light source 101. The 1st light source 101 was installed in the 1st surface A side of the partition panel 1 so that it might become 12 cm.

First, the scene visibility was evaluated under indoor lighting (fluorescent lamp, total luminous flux Φ _I1 , Φ _I2 : 10000 lumens, horizontal distance to the partition panel 1: 2 m). The results are shown in Table 1.
Next, the visibility of the scene when the partition panel 1 was irradiated with light from the first light source 101 was evaluated. The results are shown in Table 1.

(Example 2)
Ultraviolet curable resin (Hitaloid (registered trademark) 7981, manufactured by Hitachi Chemical Co., Ltd., specific gravity 1.1) and titanium oxide fine particles (average particle size: 0.2 μm, specific gravity 4.2) are 0.1% by volume. A paste mixed with was prepared.
The paste was applied to the surface of a transparent PET film (Toyobo Co., Ltd., Cosmo Shine (registered trademark) A4300, thickness: 75 μm) to a thickness of 5 μm by a blade coating method. A transparent PET film (thickness: 75 μm) was overlaid on the paste.
The light scattering sheet of Example 2 was obtained by irradiating ultraviolet rays and curing the paste.

  Soda lime glass plate (Matsunami Glass, thickness: 3 mm), PVB film (Solutia Saflex RK11l, thickness: 375 μm), light scattering sheet of Example 2, PVB film (thickness: 375 μm), soda lime glass The plates (thickness: 3 mm) were laminated in this order, and vacuum thermocompression bonding was performed to obtain the transmission scattering type partition panel of Example 2. Table 1 shows the optical characteristics of the partition panel of Example 2.

  Scene visibility was evaluated in the same manner as in Example 1 except that the transmission / scattering partition panel of Example 2 was used instead of the reflective / scattering partition panel of Example 1. The results are shown in Table 1.

(Example 3)
On the surface of a transparent PET film (manufactured by Toyobo Co., Ltd., Cosmo Shine (registered trademark) A4300, thickness: 100 μm), 100 parts by mass of UV curable resin (Ossol (registered trademark) EA-F5003, manufactured by Osaka Gas Chemical Co., Ltd.) A solution obtained by mixing 3 parts by mass of a photoinitiator (manufactured by BASF, Irgacure (registered trademark) 907) was applied to a thickness of 10 μm by a die coating method.
A white PET film (Toray, E20, arithmetic average roughness Ra: 0.23 μm) with an irregular concavo-convex structure formed on its surface is placed on the surface of the UV curable resin so that the concavo-convex structure is in contact with the UV curable resin. Overlaid on top.

After irradiating 1000 mJ ultraviolet rays from the transparent PET film side to cure the ultraviolet curable resin to form the first transparent layer having the irregular uneven structure of the white PET film transferred to the surface, the white PET film Was peeled off.
Aluminum was physically vapor-deposited on the surface of the first transparent layer by a vacuum vapor deposition method to form a reflective film made of an aluminum thin film (thickness: 8 nm).

3 masses of photoinitiator (BASF, Irgacure (registered trademark) 907) with respect to 100 parts by mass of UV curable resin (Ossol (registered trademark) EA-F5003) manufactured on Osaka Gas Chemical Co., Ltd. The partially mixed solution was applied to a thickness of 10 μm by a die coating method, and a transparent PET film (thickness: 100 μm) was overlaid on the ultraviolet curable resin.
After irradiating 1000 mJ of ultraviolet rays to cure the ultraviolet curable resin to form the second transparent layer, the transparent PET film on the surface of the second transparent layer was peeled off.

Ultraviolet curable resin (Hitaloid (registered trademark) 7981, manufactured by Hitachi Chemical Co., Ltd., specific gravity 1.1) and titanium oxide fine particles (average particle size: 0.2 μm, specific gravity 4.2) are 0.1% by volume. A paste mixed with was prepared.
The paste was applied to the surface of the second transparent layer by a blade coating method so as to have a thickness of 5 μm, and a transparent PET film (thickness: 75 μm) was overlaid on the paste.
The light scattering sheet of Example 3 was obtained by irradiating ultraviolet rays and curing the paste.

  Soda lime glass plate (Matsunami Glass, thickness: 3 mm), PVB film (Solutia, Saflex RK11l, thickness: 375 μm), light scattering sheet of Example 3, PVB film (thickness: 375 μm), soda lime glass The plates (thickness: 3 mm) were laminated in this order, and vacuum thermocompression bonding was performed to obtain the reflective and transmissive bidirectional scattering type partition panel of Example 3. Table 1 shows the optical characteristics of the partition panel of Example 3.

  Scene visibility was evaluated in the same manner as in Example 1 except that the reflective / transmission bidirectional scattering type partition panel of Example 3 was used instead of the reflection / scattering type partition panel of Example 1. The results are shown in Table 1.

(Example 4)
As a partition panel of Example 4, a soda lime glass plate (manufactured by Matsunami Glass Co., Ltd., thickness: 3 mm) was prepared. Table 1 shows the optical characteristics of the partition panel of Example 4.
Scene visibility was evaluated in the same manner as in Example 1 except that the partition panel of Example 4 was used instead of the reflection / scattering partition panel of Example 1. The results are shown in Table 1.

(Example 5)
As a partition panel of Example 5, a ground glass (arithmetic average roughness: 5 μm) prepared by sandblasting was prepared. Table 1 shows the optical characteristics of the partition panel of Example 5.
Scene visibility was evaluated in the same manner as in Example 1 except that the partition panel of Example 5 was used instead of the reflection / scattering partition panel of Example 1. The results are shown in Table 1.

The partition panels of Examples 1 to 3 could be switched between see-through and non-see-through depending on the presence or absence of light irradiation from the light source.
Even if the partition panel of Example 4 was irradiated with light from the light source, it was not possible to make it impossible for the observer to visually recognize the scene on the other side of the partition panel.
The partition panel of Example 5 could not visually recognize the sight seen beyond the partition panel as viewed from the observer regardless of the presence or absence of light irradiation from the light source.

  The partition panel of the present invention is useful as a partition panel used in a partition system that makes it impossible for a viewer to see a scene beyond the partition panel as necessary for privacy protection, secret protection, security, and the like. .

DESCRIPTION OF SYMBOLS 1 Partition panel 1a Partition panel 1b Partition panel 2 Partition panel 2c Partition panel 3 Partition panel 10 1st transparent base material 12 Adhesive layer 20 2nd transparent base material 22 Adhesive layer 30 Light-scattering sheet 31 1st transparent film 32 1st 1 transparent layer 33 reflective film 34 second transparent layer 35 second transparent film 36 photocurable resin 37 photocurable resin 40 light scattering sheet 40c light scattering sheet 41 first transparent film 42 transparent layer 43 light scattering portion 45 Second transparent film 49 Light scattering layer 50 Light scattering sheet 51 First transparent film 52 First transparent layer 53 Reflective film 54 Second transparent layer 55 Second transparent film 59 Light scattering layer 61 Mold 101 First Light source 102 second light source 201 illumination 202 illumination A first surface B second surface D1 scattered light 1 'scattered light D2 scattered light I1 light I2 light L1 light L2 light S1 light S2 light X viewer Y observer

Claims (14)

A transparent partition panel having a first surface and a second surface opposite to the first surface,
Between the first surface and the second surface,
A first transparent layer having an uneven structure on the surface;
A reflective film that is formed along the surface of the first transparent layer on the concave-convex structure side and transmits a part of incident light;
A second transparent layer provided so as to cover the surface of the reflective film, the refractive index of which is substantially the same as the refractive index of the first transparent layer;
The transmittance is 1% or more,
The diffuse reflectance is 1% or more,
The partition panel whose front haze is 50% or less.   The partition panel according to claim 1, wherein the uneven structure on the surface of the first transparent layer is an irregular uneven structure. The partition panel according to claim 1 or 2,
A partition system comprising: a first light source that is disposed on the first surface side of the partition panel and that irradiates the partition panel with light. The total luminous flux Φ _L1 of the first light source, the total luminous flux Φ _{I2 of the} illumination closest to the partition panel among the illuminations installed to brighten the space on the second surface side of the partition panel, and the partition The partition system according to claim 3, wherein the non-diffuse transmittance T _{0 of the} panel satisfies the relationship of the following expression (1).
_{Φ L1 ≧ Φ I2 × (T} 0/100) / 2 ··· (1)   The partition system of Claim 3 or 4 further provided with the 2nd light source which irradiates light to the said partition panel installed in the said 2nd surface side of the said partition panel. The total luminous flux Φ _L2 of the second light source, the total luminous flux Φ _{I1 of the} illumination closest to the partition panel among the illuminations installed to brighten the space on the first surface side of the partition panel, and the partition The partition system according to claim 5, wherein the non-diffuse transmittance T _{0 of the} panel satisfies the relationship of the following expression (2).
_{Φ L2 ≧ Φ I1 × (T} 0/100) / 2 ··· (2) A partition panel having a first surface and a second surface opposite to the first surface,
A light scattering layer including a light scattering material between the first surface and the second surface;
The transmittance is 1% or more,
The partition panel whose front haze is 9 to 50%. A partition panel according to claim 7;
A partition system comprising: a first light source that is disposed on the first surface side of the partition panel and that irradiates the partition panel with light. The total luminous flux Φ _L1 of the first light source and the total luminous flux Φ _{I1 of the} illumination closest to the partition panel among the illuminations installed to brighten the space on the first surface side of the partition panel are The partition system of Claim 8 which satisfies the relationship of Formula (3).
Φ _L1 ≧ Φ _I1 / 10 (3)   The partition system of Claim 8 or 9 further provided with the 2nd light source which irradiates light to the said partition panel installed in the said 2nd surface side of the said partition panel. The total luminous flux Φ _L2 of the second light source and the total luminous flux Φ _{I2 of} illumination closest to the partition panel among the illuminations installed to brighten the space on the second surface side of the partition panel are The partition system of Claim 10 which satisfies the relationship of Formula (4).
Φ _L2 ≧ Φ _I2 / 10 (4) A partition panel having a first surface and a second surface opposite to the first surface,
Between the first surface and the second surface,
A reflective film that transmits part of the incident light;
A light scattering layer containing a light scattering material, and
The transmittance is 1% or more,
The diffuse reflectance is 1% or more,
The partition panel whose front haze is 9 to 50%. A partition panel according to claim 12,
A partition system comprising: a first light source that is disposed on the first surface side of the partition panel and that irradiates the partition panel with light. The total luminous flux Φ _L1 of the first light source, the total luminous flux Φ _{I2 of the} illumination closest to the partition panel among the illuminations installed to brighten the space on the second surface side of the partition panel, and the partition The non-diffusive transmittance T _{0 of the} panel satisfies the relationship of the following formula (1):
The total luminous flux Φ _L1 of the first light source and the total luminous flux Φ _{I1 of the} illumination closest to the partition panel among the illuminations installed to brighten the space on the first surface side of the partition panel are The partition system of Claim 13 which satisfies the relationship of Formula (3).
_{Φ L1 ≧ Φ I2 × (T} 0/100) / 2 ··· (1)
Φ _L1 ≧ Φ _I1 / 10 (3)

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