WO2015125741A1 - Lighting implement - Google Patents

Lighting implement Download PDF

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Publication number
WO2015125741A1
WO2015125741A1 PCT/JP2015/054171 JP2015054171W WO2015125741A1 WO 2015125741 A1 WO2015125741 A1 WO 2015125741A1 JP 2015054171 W JP2015054171 W JP 2015054171W WO 2015125741 A1 WO2015125741 A1 WO 2015125741A1
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WO
WIPO (PCT)
Prior art keywords
light
control member
light control
transparent substrate
layer
Prior art date
Application number
PCT/JP2015/054171
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French (fr)
Japanese (ja)
Inventor
茂樹 今村
康弘 大木
雅幸 関戸
千明 小幡
聖 三塚
Original Assignee
大日本印刷株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Priority to JP2015531383A priority Critical patent/JP5907450B2/en
Publication of WO2015125741A1 publication Critical patent/WO2015125741A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles

Definitions

  • the present invention relates to a lighting tool.
  • Light control member that improves daylighting efficiency by deflecting external light incident on the window toward the indoor ceiling as part of efforts to reduce carbon dioxide emissions and reduce power consumption by reducing the intensity of indoor lighting.
  • a concave groove extending in one direction is repeatedly formed, and a reflecting surface extending in one direction reflecting incident light to the transparent sheet material is concaved by filling the concave groove with the filler.
  • a technique is disclosed in which direct sunlight that is formed on at least one slope of a groove and is transmitted through a window by reflection by a reflecting surface is introduced indoors.
  • the light control member described above may cause glare or glare due to reflection or refraction at the interface between the transparent sheet material and the filler. As a countermeasure against this, it is conceivable to provide an antiglare layer having an uneven structure on the light control member.
  • This invention is made
  • JP2014-44305 published after the priority date of the present application describes a lighting tool in which a single glass substrate, a light control member, and a diffusion layer are laminated.
  • the problem specific to the present application is found for the first time when a structure in which a light control member is sandwiched between a pair of transparent base materials as described above is employed. That is, it is impossible to conceive the problem of the present application and the means unique to the present application to solve the problem from the lighting tool described in JP2014-44305 using a single glass substrate.
  • the first daylighting tool exists between a first surface on which light is incident, a second surface that is opposed to the first surface and emits light, and between the first surface and the second surface.
  • a light control member including a reflection surface that deflects light incident from the first surface toward the second surface;
  • a first transparent substrate disposed on the first surface side of the light control member;
  • a second transparent substrate disposed on the second surface side of the light control member;
  • a light scattering layer that scatters light is disposed between the light control member and the first transparent substrate and between at least one of the light control member and the second transparent substrate.
  • the light scattering layer may have particles therein.
  • the light scattering layer may have a void inside.
  • the second lighting tool is a first surface on which light is incident, a second surface that faces the first surface and emits light, and exists between the first surface and the second surface,
  • a light control member including a reflecting surface that deflects light incident from the first surface toward the second surface;
  • a first transparent substrate disposed on the first surface side of the light control member;
  • a second transparent substrate disposed on the second surface side of the light control member;
  • An antiglare layer having a concavo-convex structure is disposed on at least one of the first transparent substrate and the second transparent substrate that does not face the light control member.
  • the haze value measured according to JIS-K7361-1 may be 30% or more and 95% or less.
  • 1st or 2nd lighting tool by this invention WHEREIN: It is arrange
  • at least one of the first bonding layer and the second bonding layer may scatter light.
  • the light scattering layer may join at least one of the first transparent substrate and the second transparent substrate and the light control member.
  • the desired anti-glare effect can be exhibited in a lighting tool in which a light control member is sandwiched between a pair of transparent base materials.
  • the light control member 10 includes a first surface 10a on which light is incident, a second surface 10b that faces the first surface 10a and emits light, a first surface 10a, and a second surface. And a reflecting surface 10c that exists between the surface 10b and deflects light incident from the first surface 10a toward the second surface 10b.
  • the light control member 10 typically has a plurality of low-refractive index medium portions 11 extending in one direction (the front and back direction in FIG. 1A and FIG. 1B), and a height that separates the low-refractive index medium portions 11 from each other. And a refractive index medium portion 12.
  • a plurality of low refractive index medium portions 11 and a plurality of high refractive index medium portions 12 are arranged along an arrangement direction P extending in the first surface 10a perpendicular to the one direction. It is arranged repeatedly alternately.
  • the low refractive index medium section 11 is composed of a medium having a lower refractive index than the refractive index of the high refractive index medium section 12.
  • the high refractive index medium portion 12 is a resin
  • the low refractive index medium portion 11 can be made of air or a resin having a lower refractive index than the resin constituting the high refractive index medium portion 12.
  • the low refractive index medium portion 11 is composed of a medium having a lower refractive index than the high refractive index medium portion 12, the interface between the low refractive index medium portion 11 and the high refractive index medium portion 12.
  • a reflective surface 10c is formed.
  • the plurality of low refractive index medium portions 11 and the plurality of high refractive index medium portions 12 are alternately and repeatedly arranged in the arrangement direction P. Therefore, the plurality of reflecting surfaces 10c are arranged along the arrangement direction P.
  • the reflective surface 10c in this specification refers to a surface that is expected to exert a total reflection effect on light that is intended to be taken into the light control member 10. In the example shown in FIGS.
  • the reflecting surface 10c is intended to reflect the light L1 that is incident from the direction inclined upward of the paper with respect to the normal direction nd to the first surface 10a.
  • the reflection surface 10c is an interface between the low refractive index medium portion 11 and the portion of the high refractive index medium portion 12 adjacent to the low refractive index medium portion 11 on the upper side in the drawing.
  • the light L1 incident from the direction inclined above the paper surface with respect to the normal direction nd to the first surface 10a is reflected by the reflecting surface 10c and its traveling direction is greatly changed.
  • the light L2 incident from the direction substantially along the normal direction nd to the first surface 10a is transmitted through the high refractive index medium portion 12 mainly without entering the reflecting surface 10c.
  • These lights L1 and L2 are emitted from the second surface 10b opposed to the first surface 10a and travel outside the light control member 10.
  • the reflective surface 10c is not limited to the above, and may be formed by disposing a highly reflective material such as metal in the light control member 10, for example.
  • the light control member 10 may include other layers on the first surface 10a side and / or the second surface 10b side as required (see FIG. 1B).
  • the light control member 10 when it is formed by photocuring, it may have a support layer 13 for supporting the resin before molding.
  • FIG. 2 is a cross-sectional view illustrating the daylighting tool according to the first embodiment of the present invention.
  • the lighting tool 100 includes a light control member 10, a first transparent base material 20 disposed on the first surface 10a side of the light control member 10, and a second transparent base disposed on the second surface 10b side of the light control member.
  • a light scattering layer that scatters light between at least one of the light control member 10 and the first transparent base material 20 and between the light control member 10 and the second transparent base material 30. 40.
  • the light control member 10 is sandwiched and sealed between the first transparent base material 20 and the second transparent base material 30, and a light scattering layer is interposed between the light control member 10 and the second transparent base material 30. 40 is arranged. Also, typically, the first transparent substrate 20 side faces the outside, and the second transparent substrate 30 side faces the room.
  • Each of the transparent base materials 20 and 30 is typically glass, but includes not only glass but also those generally used like glass such as reinforced plastic such as acrylic resin, and these single layers, or A laminate of these can be used.
  • Each of the transparent base materials 20 and 30 only needs to have transparency enough to be used as a general window material.
  • a haze meter Sudden Instruments Co., Ltd. Fluorescence spectrophotometer F-4500
  • the total light transmittance measured in (1) is 80% or more.
  • the thickness of each of the transparent base materials 20 and 30 is not particularly limited, but is preferably a thickness that can ensure the strength and handleability as the window material as a whole of the daylighting tool 100, for example, 1 mm to 10 mm, respectively. It is preferable.
  • bonding layers 50 and 60 for bonding the transparent base materials 20 and 30 and the light control member 10 are provided on the surfaces 20b and 30b of the transparent base materials 20 and 30 on the side facing the light control member 10.
  • the first bonding layer 50 is disposed between the first transparent base material 20 and the light control member 10, and the first transparent base material 20 and the light control member 10 are bonded together.
  • the 2nd joining layer 60 is arrange
  • Each joining layer 50 and 60 can be formed using a well-known adhesive agent, for example. Note that the bonding layers 50 and 60 can scatter light by including particles and voids in the same manner as the light scattering layer 40 described later.
  • the light scattering layer 40 is disposed at least between the light control member 10 and the first transparent base material 20 and between the light control member 10 and the second transparent base material 30, and enters the layer. Scatter light.
  • the light scattering layer 40 is disposed between the light control member 10 and the second transparent substrate 30.
  • the light scattering layer 40 may be disposed between the light control member 10 and the first transparent substrate 20.
  • particles for example, hollow particles such as silica, calcium carbonate, and acrylic, fillers such as titanium oxide, barium sulfate, magnesium oxide, and talc, and beads such as acrylic, urethane, and glass can be used. Spherical particles are preferred.
  • the light scattering layer 40 can be formed by appropriately dispersing these particles in a resin.
  • the average maximum width of the particles is a value measured with a scanning electron microscope (SEM).
  • the resin is formed into a film by a melt extrusion molding method, cooled, then biaxially stretched and oriented, and crystallized by heat setting to generate fine bubbles. May be.
  • a white polyethylene terephthalate (PET) film having voids is preferably used.
  • the thickness of the light scattering layer 40 is not particularly limited, but is preferably 0.5 ⁇ m to 100 ⁇ m from the viewpoint of processability and optical characteristics.
  • the light-scattering layer 40 may be provided with the property of both the above-mentioned 1st aspect and a 2nd aspect.
  • a frosted glass or a template glass may be used as a mode other than the above.
  • the daylighting tool 100 configured as described above has a haze value measured in accordance with JIS-K7361-1 set to 30% or more and 95% or less. This is because if the haze value is less than 30%, the antiglare property may be insufficient, and if the haze value exceeds 95%, the daylighting property may be insufficient.
  • the haze value is more preferably 35% or more and 80% or less.
  • the haze value of the daylighting tool 100 can be measured using a haze meter (Suga Test Instruments Co., Ltd. Fluorescence spectrophotometer F-4500).
  • the light L1 incident from the direction inclined upward of the paper surface with respect to the normal direction nd to the first surface 10a of the light control member 10 is reflected by the reflecting surface 10c and its traveling direction is greatly changed.
  • the light L2 incident from the direction substantially along the normal direction nd to the first surface 10a is transmitted through the high refractive index medium portion 12 without mainly entering the reflecting surface 10c.
  • these lights L1 and L2 are diffused by the light scattering layer 40 and are emitted indoors from the second glass substrate 30.
  • the daylighting tool 100 has the light scattering layer 40.
  • the light reflected or refracted in the light control member 10 can be diffused by the light scattering layer 40 and taken into the room.
  • the observer who is indoors sees the outdoor through the lighting tool 100, it can relieve the feeling of glare and glare that may occur due to reflection and refraction by the light control member 10. .
  • FIG. 3 is a cross-sectional view illustrating a modification of the daylighting tool according to the first embodiment.
  • the lighting tool 200 shown in FIG. 3 is different from the lighting tool 100 shown in FIG. 2 in that the light scattering layer 40 directly contacts the light control member 10 and serves as a support layer.
  • the lighting tool 200 includes a light control member 10, a first transparent substrate 20 disposed on the first surface 10 a side of the light control member 10, and a second transparent disposed on the second surface 10 b side of the light control member 10.
  • a light scattering member that scatters light between at least one of the light control member 10 and the first transparent substrate 20 and between the light control member 10 and the second transparent substrate 30.
  • the layer 40 is disposed, and the light control member 10 and the light scattering layer 40 are in direct contact with each other.
  • the daylighting tool 200 includes the light scattering layer 40, whereby light guided from the outside to the room through the daylighting tool 200 is diffused by the light scattering layer 40, and glare given to the observer can be reduced. And since the light-scattering layer 40 contacts the light control member 10 directly and plays the role of a support layer, the structure of the lighting tool 200 can be simplified and thickness can be reduced.
  • FIG. 4 is a cross-sectional view illustrating another modified example of the daylighting tool according to the first embodiment.
  • the lighting tool 300 shown in FIG. 4 is different in that the light scattering layer 40 is also disposed between the light control member 10 and the first transparent substrate 20, and the other points are the same as those of the lighting tool 100 shown in FIG. It is substantially the same.
  • the lighting tool 300 includes the light control member 10, the first transparent base material 20 disposed on the first surface side 10 a of the light control member 10, and the second transparent disposed on the second surface 10 b side of the light control member 10.
  • the first light scattering layer 40a and the second light scattering layer 40b may be configured in substantially the same manner.
  • the haze value of the first light scattering layer 40a is greater than the haze value of the second light scattering layer 40b. Is preferably low. This is because such a configuration can achieve both daylighting and anti-glare properties.
  • the lighting tool 300 includes the first light scattering layer 40a and the second light scattering layer 40b as the light scattering layers, so that the light guided from the outdoor to the indoor through the lighting tool 300 is the first light scattering layer 40a. Further, it is possible to reduce glare that is diffused by the second light scattering layer 40b and given to the observer.
  • FIG. 5 is a cross-sectional view for explaining a daylighting tool according to the second embodiment.
  • the second embodiment described with reference to FIG. 5 is different in that an anti-glare layer 140 is disposed instead of the light scattering layer 40, but other configurations are the same as in the first embodiment. Can be configured.
  • the lighting tool 400 illustrated in FIG. 5 is disposed on the light control member 10, the first transparent base material 20 disposed on the first surface side 10 a of the light control member 10, and the second surface 10 b side of the light control member 10.
  • the antiglare layer having a concavo-convex structure on at least one of the first transparent substrate 10 and the second transparent substrate 20 that does not face the light control member 10. 140 is arranged.
  • the anti-glare layer 140 is disposed on at least one of the first transparent substrate 20 and the second transparent substrate 30 and has a concavo-convex structure on the side not in contact with the transparent substrate.
  • the antiglare layer 140 is disposed on the surface 30 a of the second transparent base material 30 on the side that does not face the light control member 10.
  • the antiglare layer 140 may be disposed on the first transparent substrate 20 side.
  • the anti-glare layer 140 a commercially available film having a concavo-convex structure with beads or the like on the surface (what is called a haze film); an embossed film on the surface Etc. can be used.
  • a haze film As an uneven
  • the thickness of the antiglare layer 140 is not particularly limited, but is preferably 0.5 ⁇ m to 100 ⁇ m from the viewpoint of processability and optical characteristics.
  • rubbed glass or template glass may be used as the antiglare layer 140.
  • the rubbed glass is a glass having a rubbed pattern on one or both surfaces, and the rubbed pattern can be laid down by, for example, sandblasting and chemical treatment of the glass surface.
  • the template glass is glass having a pattern on one or both surfaces, and the pattern can be applied, for example, by passing molten glass between rolls having a mold on one or both sides.
  • the lighting tool 400 configured as described above has a haze value measured in accordance with JIS-K7361-1 set to 30% or more and 95% or less. This is because if the haze value is less than 30%, the antiglare property may be insufficient, and if the haze value exceeds 95%, the daylighting property may be insufficient.
  • the haze value is more preferably 35% or more and 80% or less.
  • the light L1 incident from the direction inclined upward of the paper surface with respect to the normal direction nd to the first surface 10a of the light control member 10 is reflected by the reflecting surface 10c and its traveling direction is greatly changed.
  • the light L2 incident from the direction substantially along the normal direction nd to the first surface 10a is transmitted through the high refractive index medium portion 12 without mainly entering the reflecting surface 10c.
  • these lights L1 and L2 are diffused by the anti-glare layer 140 and are emitted indoors.
  • the daylighting tool 100 has the antiglare layer 140.
  • the light reflected or refracted in the light control member 10 can be diffused by the antiglare layer 140 and taken into the room.
  • the observer who is indoors sees the outdoor through the lighting tool 100, it can relieve the feeling of glare and glare that may occur due to reflection and refraction by the light control member 10. .
  • the base material which has anti-glare property for example, a rubbed glass, a template glass, etc.
  • the antiglare function of the light control member 10 can be further enhanced.
  • FIG. 6 is a cross-sectional view illustrating a modification of the daylighting tool according to the second embodiment.
  • the daylighting tool 500 shown in FIG. 6 is different from the daylighting tool 400 shown in FIG. 5 in that the antiglare layer is also disposed on the first transparent base material 20 side.
  • the lighting tool 500 includes a light control member 10, a first transparent substrate 20 disposed on the first surface side 10 a of the light control member 10, and a second transparent disposed on the second surface 10 b side of the light control member 10. And an anti-glare layer 140 having a concavo-convex structure on both sides of the first transparent substrate 20 and the second transparent substrate 30 not facing the light control member 10 (first anti-glare layer 140a).
  • the second antiglare layer 140b) is disposed.
  • the first anti-glare layer 140a and the second anti-glare layer 140b may be configured in substantially the same manner.
  • the haze value of the first anti-glare layer 140a is greater than the haze value of the second anti-glare layer 140b.
  • it is low. This is because such a configuration can achieve both daylighting and anti-glare properties.
  • the lighting tool 500 includes the first anti-glare layer 140a and the second anti-glare layer 140b as the anti-glare layer, so that the light guided from the outdoor to the indoor through the lighting tool 500 is the first anti-glare layer 140a. Further, it is possible to reduce glare that is diffused by the second anti-glare layer 140b and given to the observer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Laminated Bodies (AREA)
  • Securing Of Glass Panes Or The Like (AREA)

Abstract

In the present invention, the following are provided: a light controlling member (10) which includes a first surface (10a) on which light is incident, a second surface (10b) which opposes the first surface (10a) and from which light is emitted, and reflective surfaces (10c) which are between the first surface (10a) and the second surface (10b) and deflect the light from the first surface (10a) towards the second surface (10b); a first transparent substrate (20) that is disposed on the first surface (10a) side of the light controlling member; and a second transparent substrate that is disposed on the second surface (10b) side of the light controlling member (10). A light scattering layer (40) for scattering light is disposed between the light controlling member (10) and the first transparent member (20), and/or between the light controlling member (10) and the second transparent substrate (30).

Description

採光具Daylight
　本発明は、採光具に関する。 The present invention relates to a lighting tool.
　屋内の照明の照明強度を弱めて二酸化炭素の排出量の削減と消費電力の低減を図る一環として、窓に入射された外光を屋内の天井方向に偏向させて採光効率を向上させる光制御部材が提案されている。例えば、ＪＰ２０１２－２５５９５１Ａには、一方向に延在する凹状溝が繰り返し作製され、凹状溝への充填材の充填により、透明シート材への入射光を反射する一方向に延長した反射面が凹状溝の少なくとも一方の斜面に形成され、反射面による反射により、窓を透過した直射太陽光を屋内に導入する技術が開示されている。 Light control member that improves daylighting efficiency by deflecting external light incident on the window toward the indoor ceiling as part of efforts to reduce carbon dioxide emissions and reduce power consumption by reducing the intensity of indoor lighting. Has been proposed. For example, in JP2012-255951A, a concave groove extending in one direction is repeatedly formed, and a reflecting surface extending in one direction reflecting incident light to the transparent sheet material is concaved by filling the concave groove with the filler. A technique is disclosed in which direct sunlight that is formed on at least one slope of a groove and is transmitted through a window by reflection by a reflecting surface is introduced indoors.
　上述の光制御部材は、透明シート材と充填材との界面での反射や屈折に起因して、ぎらつきや眩しさを感知させることがある。この対策として、光制御部材に凹凸構造を有する防眩層を設けることが考えられる。 The light control member described above may cause glare or glare due to reflection or refraction at the interface between the transparent sheet material and the filler. As a countermeasure against this, it is conceivable to provide an antiglare layer having an uneven structure on the light control member.
　しかしながら、本発明者らが検討した結果、例えば、光制御部材を一対のガラス板で挟んだ合わせガラスと呼ばれる構造を採用した場合、防眩層が有する凹凸構造がガラス板と光制御部材とを接合するための接着剤等によって埋まってしまい、所期の防眩効果が得られないということが分かった。また、凹凸構造を有する光散乱層を一対のガラス板の内側に設けた場合、凹凸構造によりガラス板と光制御部材との間の閉鎖空間に気泡や不必要な空隙等が発生してしまい製品上好ましくということが分かった。 However, as a result of studies by the present inventors, for example, when a structure called laminated glass in which a light control member is sandwiched between a pair of glass plates is adopted, the uneven structure of the antiglare layer is obtained by combining the glass plate and the light control member. It was found that the desired anti-glare effect could not be obtained due to being buried by the adhesive for joining. In addition, when a light scattering layer having a concavo-convex structure is provided inside a pair of glass plates, the concavo-convex structure may cause bubbles or unnecessary gaps in the closed space between the glass plate and the light control member. It turned out to be preferable.
　本発明は、上記実情に鑑みてなされたものであり、一対の透明基材で光制御部材を挟んだ採光具において、所期の防眩効果を発現させることを目的とする。 This invention is made | formed in view of the said situation, and aims at making the anti-glare effect express in the lighting tool which pinched | interposed the light control member with a pair of transparent base material.
　なお、本願の優先日後に公開されたＪＰ２０１４－４４３０５には、単一のガラス基材と、光制御部材と、拡散層と、を積層させた採光具が記載されている。しかしながら、本願固有の課題は、上述のように、一対の透明基材で光制御部材を挟む構造を採用した場合に初めて見出されるものである。すなわち、単一のガラス基材を用いるＪＰ２０１４－４４３０５に記載の採光具から、本願の課題及びその課題を解決する本願固有の手段に想到することは不可能である。 Note that JP2014-44305 published after the priority date of the present application describes a lighting tool in which a single glass substrate, a light control member, and a diffusion layer are laminated. However, the problem specific to the present application is found for the first time when a structure in which a light control member is sandwiched between a pair of transparent base materials as described above is employed. That is, it is impossible to conceive the problem of the present application and the means unique to the present application to solve the problem from the lighting tool described in JP2014-44305 using a single glass substrate.
　本発明による第１の採光具は、光が入射する第１面、前記第１面に対向し光が出射する第２面、及び、前記第１面と前記第２面との間に存在し、前記第１面から入射した光を前記第２面に向けて偏向する反射面、を含む光制御部材と、
　前記光制御部材の前記第１面側に配置された第１透明基材と、
　前記光制御部材の前記第２面側に配置された第２透明基材と、
を備え、
　前記光制御部材と前記第１透明基材との間、及び前記光制御部材と前記第２透明基材との間の少なくとも一方に、光を散乱する光散乱層が配置されている。 The first daylighting tool according to the present invention exists between a first surface on which light is incident, a second surface that is opposed to the first surface and emits light, and between the first surface and the second surface. A light control member including a reflection surface that deflects light incident from the first surface toward the second surface;
A first transparent substrate disposed on the first surface side of the light control member;
A second transparent substrate disposed on the second surface side of the light control member;
With
A light scattering layer that scatters light is disposed between the light control member and the first transparent substrate and between at least one of the light control member and the second transparent substrate.
　本発明による第１の採光具において、前記光散乱層は、内部に粒子を有していてもよい。 In the first lighting tool according to the present invention, the light scattering layer may have particles therein.
　本発明による第１の採光具において、前記光散乱層は、内部に空隙を有していてもよい。 In the first daylighting tool according to the present invention, the light scattering layer may have a void inside.
　本発明による第２の採光具は、光が入射する第１面、前記第１面に対向し光が出射する第２面、前記第１面と前記第２面との間に存在し、前記第１面から入射した光を前記第２面に向けて偏向する反射面、を含む光制御部材と、
　前記光制御部材の前記第１面側に配置された第１透明基材と、
　前記光制御部材の前記第２面側に配置された第２透明基材と、
を備え、
　前記第１透明基材及び前記第２透明基材のうちの少なくとも一方の、前記光制御部材に対向しない側に、凹凸構造を有する防眩層が配置されている。 The second lighting tool according to the present invention is a first surface on which light is incident, a second surface that faces the first surface and emits light, and exists between the first surface and the second surface, A light control member including a reflecting surface that deflects light incident from the first surface toward the second surface;
A first transparent substrate disposed on the first surface side of the light control member;
A second transparent substrate disposed on the second surface side of the light control member;
With
An antiglare layer having a concavo-convex structure is disposed on at least one of the first transparent substrate and the second transparent substrate that does not face the light control member.
　本発明による第２の採光具において、前記第１透明基材及び前記第２透明基材の両方の、前記光制御部材に対向しない側に、凹凸構造を有する防眩層が配置されていてもよい。 In the 2nd daylighting instrument by this invention, even if the glare-proof layer which has an uneven | corrugated structure is arrange | positioned in the side which does not oppose the said light control member of both the said 1st transparent base material and the said 2nd transparent base material Good.
　本発明による第１または第２の採光具において、ＪＩＳ－Ｋ７３６１－１に準拠して測定されるヘーズ値が３０％以上９５％以下であってもよい。 In the first or second daylighting tool according to the present invention, the haze value measured according to JIS-K7361-1 may be 30% or more and 95% or less.
　本発明による第１または第２の採光具において、前記第１透明基材と前記光制御部材との間に配置され、且つ、前記第１透明基材と前記光制御部材とを接合する第１接合層と、前記第２透明基材と前記光制御部材との間に配置され、且つ、前記第２透明基材と前記光制御部材とを接合する第２接合層と、をさらに備えてもよい。さらに、前記第１接合層及び前記第２接合層の少なくとも一方が光を散乱してもよい。 1st or 2nd lighting tool by this invention WHEREIN: It is arrange | positioned between the said 1st transparent base material and the said light control member, and joins the said 1st transparent base material and the said light control member. A bonding layer; and a second bonding layer that is disposed between the second transparent substrate and the light control member and that bonds the second transparent substrate and the light control member. Good. Furthermore, at least one of the first bonding layer and the second bonding layer may scatter light.
　本発明による第１の採光具において、前記光散乱層が、前記第１透明基材及び前記第２透明基材の少なくとも一方と前記光制御部材とを接合してもよい。 In the first daylighting tool according to the present invention, the light scattering layer may join at least one of the first transparent substrate and the second transparent substrate and the light control member.
　本発明によれば、一対の透明基材で光制御部材を挟んだ採光具において、所期の防眩効果を発現させることができる。 According to the present invention, the desired anti-glare effect can be exhibited in a lighting tool in which a light control member is sandwiched between a pair of transparent base materials.
光制御部材の構成の一例を説明する断面図である。It is sectional drawing explaining an example of a structure of a light control member. 光制御部材の構成の他の例を説明する断面図である。It is sectional drawing explaining the other example of a structure of a light control member. 第１の実施の形態による採光具を説明する断面図である。It is sectional drawing explaining the lighting tool by 1st Embodiment. 図２に示す採光具の一変形例を説明する断面図である。It is sectional drawing explaining the modification of the lighting tool shown in FIG. 図２に示す採光具の別の変形例を説明する断面図である。It is sectional drawing explaining another modification of the lighting tool shown in FIG. 第２の実施の形態による採光具を説明する断面図である。It is sectional drawing explaining the lighting tool by 2nd Embodiment. 図５に示す採光具の一変形例を説明する断面図である。It is sectional drawing explaining the modification of the lighting tool shown in FIG.
　以下、本発明の実施の形態について、詳細に説明する。なお、本件明細書に添付する図面においては、図示と理解のしやすさの便宜上、縮尺および縦横の寸法比等を、実物のそれらから適宜変更したり、誇張したりすることがある。 Hereinafter, embodiments of the present invention will be described in detail. Note that in the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, vertical and horizontal dimensional ratios, and the like may be appropriately changed or exaggerated from those of the actual product.
　まず一実施の形態による採光具の説明をするに先立ち、光制御部材について詳述する。図１Ａ及び図１Ｂは、光制御部材の一例を説明する断面図である。図１Ａ及び図１Ｂに示すように、光制御部材１０は、光が入射する第１面１０ａと、第１面１０ａに対向し光が出射する第２面１０ｂと、第１面１０ａと第２面１０ｂとの間に存在し、第１面１０ａから入射した光を第２面１０ｂに向けて偏向する反射面１０ｃと、を含む。 First, before explaining the lighting tool according to the embodiment, the light control member will be described in detail. 1A and 1B are cross-sectional views illustrating an example of a light control member. As shown in FIGS. 1A and 1B, the light control member 10 includes a first surface 10a on which light is incident, a second surface 10b that faces the first surface 10a and emits light, a first surface 10a, and a second surface. And a reflecting surface 10c that exists between the surface 10b and deflects light incident from the first surface 10a toward the second surface 10b.
　光制御部材１０は、典型的には、一方向（図１Ａ、図１Ｂにおいて紙面の表裏方向）に延在する複数の低屈折率媒質部１１と、低屈折率媒質部１１同士を離隔する高屈折率媒質部１２と、を有する。図１Ａ及び図１Ｂに示す例では、複数の低屈折率媒質部１１と複数の高屈折率媒質部１２とが、前記一方向に直交して第１面１０ａ内を延びる配列方向Ｐに沿って交互に繰り返し並べられている。 The light control member 10 typically has a plurality of low-refractive index medium portions 11 extending in one direction (the front and back direction in FIG. 1A and FIG. 1B), and a height that separates the low-refractive index medium portions 11 from each other. And a refractive index medium portion 12. In the example shown in FIGS. 1A and 1B, a plurality of low refractive index medium portions 11 and a plurality of high refractive index medium portions 12 are arranged along an arrangement direction P extending in the first surface 10a perpendicular to the one direction. It is arranged repeatedly alternately.
　低屈折率媒質部１１は、高屈折率媒質部１２の屈折率に比べて低い屈折率を有する媒質により構成される。例えば、高屈折率媒質部１２が、樹脂である場合、低屈折率媒質部１１は空気あるいは高屈折率媒質部１２を構成する樹脂よりも低い屈折率を有する樹脂を用いることができる。 The low refractive index medium section 11 is composed of a medium having a lower refractive index than the refractive index of the high refractive index medium section 12. For example, when the high refractive index medium portion 12 is a resin, the low refractive index medium portion 11 can be made of air or a resin having a lower refractive index than the resin constituting the high refractive index medium portion 12.
　上述のように、低屈折率媒質部１１が高屈折率媒質部１２に比べて低い屈折率を有する媒質により構成されることから、低屈折率媒質部１１と高屈折率媒質部１２との界面に、反射面１０ｃが形成されている。上述のように、複数の低屈折率媒質部１１と複数の高屈折率媒質部１２とは、配列方向Ｐに交互に繰り返し配列されている。したがって、複数の反射面１０ｃは、配列方向Ｐに沿って配列されることになる。本明細書でいう反射面１０ｃとは、光制御部材１０に取り込まれることが意図された光に対して全反射作用を及ぼすことが期待された面をいう。図１Ａ及び図１Ｂに示す例では、反射面１０ｃは、第１面１０ａへの法線方向ｎｄに対して紙面の上側に傾斜した方向から入射する光Ｌ１を反射させることが意図されている。この場合、反射面１０ｃは、低屈折率媒質部１１と、当該低屈折率媒質部１１と紙面における上側で隣接する高屈折率媒質部１２の部分と、の界面となる。 As described above, since the low refractive index medium portion 11 is composed of a medium having a lower refractive index than the high refractive index medium portion 12, the interface between the low refractive index medium portion 11 and the high refractive index medium portion 12. In addition, a reflective surface 10c is formed. As described above, the plurality of low refractive index medium portions 11 and the plurality of high refractive index medium portions 12 are alternately and repeatedly arranged in the arrangement direction P. Therefore, the plurality of reflecting surfaces 10c are arranged along the arrangement direction P. The reflective surface 10c in this specification refers to a surface that is expected to exert a total reflection effect on light that is intended to be taken into the light control member 10. In the example shown in FIGS. 1A and 1B, the reflecting surface 10c is intended to reflect the light L1 that is incident from the direction inclined upward of the paper with respect to the normal direction nd to the first surface 10a. In this case, the reflection surface 10c is an interface between the low refractive index medium portion 11 and the portion of the high refractive index medium portion 12 adjacent to the low refractive index medium portion 11 on the upper side in the drawing.
　第１面１０ａへの法線方向ｎｄに対して紙面の上側に傾斜した方向から入射する光Ｌ１は、反射面１０ｃで反射しその進行方向を大きく変化させられる。その一方で、第１面１０ａへの法線方向ｎｄに概ね沿った方向から入射する光Ｌ２は、主として反射面１０ｃに入射させずに高屈折率媒質部１２内を透過していく。これらの光Ｌ１、Ｌ２は、第１面１０ａに対向する第２面１０ｂから出射し、光制御部材１０外に進む。 The light L1 incident from the direction inclined above the paper surface with respect to the normal direction nd to the first surface 10a is reflected by the reflecting surface 10c and its traveling direction is greatly changed. On the other hand, the light L2 incident from the direction substantially along the normal direction nd to the first surface 10a is transmitted through the high refractive index medium portion 12 mainly without entering the reflecting surface 10c. These lights L1 and L2 are emitted from the second surface 10b opposed to the first surface 10a and travel outside the light control member 10.
　なお、反射面１０ｃは上記に限らず、例えば、金属などの反射率の高い材料を光制御部材１０内に配置して形成してもよい。 In addition, the reflective surface 10c is not limited to the above, and may be formed by disposing a highly reflective material such as metal in the light control member 10, for example.
　さらに光制御部材１０は、必要に応じて他の層を第１面１０ａ側及び／又は第２面１０ｂ側に備えていてもよい（図１Ｂ参照）。例えば、光制御部材１０を光硬化により形成する場合に、賦型前の樹脂を支持するための支持層１３を有していてもよい。 Furthermore, the light control member 10 may include other layers on the first surface 10a side and / or the second surface 10b side as required (see FIG. 1B). For example, when the light control member 10 is formed by photocuring, it may have a support layer 13 for supporting the resin before molding.
（第１の実施の形態）
　次に、本発明の第１の実施の形態による採光具について説明をする。図２は、本発明の第１の実施の形態による採光具を説明する断面図である。採光具１００は、光制御部材１０と、光制御部材１０の第１面１０ａ側に配置された第１透明基材２０と、光制御部材の第２面１０ｂ側に配置された第２透明基材３０と、を有し、光制御部材１０と第１透明基材２０との間、及び光制御部材１０と第２透明基材３０との間の少なくとも一方に、光を散乱する光散乱層４０を有する。この例では、光制御部材１０は、第１透明基材２０と第２透明基材３０とに挟まれて封止され、光制御部材１０と第２透明基材３０との間に光散乱層４０が配置されている。また、典型的には第１透明基材２０側が室外に面し、第２透明基材３０側が室内に面する。 (First embodiment)
Next, the lighting tool according to the first embodiment of the present invention will be described. FIG. 2 is a cross-sectional view illustrating the daylighting tool according to the first embodiment of the present invention. The lighting tool 100 includes a light control member 10, a first transparent base material 20 disposed on the first surface 10a side of the light control member 10, and a second transparent base disposed on the second surface 10b side of the light control member. A light scattering layer that scatters light between at least one of the light control member 10 and the first transparent base material 20 and between the light control member 10 and the second transparent base material 30. 40. In this example, the light control member 10 is sandwiched and sealed between the first transparent base material 20 and the second transparent base material 30, and a light scattering layer is interposed between the light control member 10 and the second transparent base material 30. 40 is arranged. Also, typically, the first transparent substrate 20 side faces the outside, and the second transparent substrate 30 side faces the room.
　各透明基材２０、３０は、典型的にはガラスであるが、ガラスのみならずアクリル樹脂などの強化プラスチックといった一般的にガラスの如く用いられるものをも包含し、さらにこれらの単層、あるいはこれらが積層されたものを用いることができる。各透明基材２０、３０は、一般的な窓材として用いられる程度の透過性を有していればよく、例えば、ヘーズメーター（スガ試験機（株）社製 蛍光分光光度計 Ｆ－４５００）で測定した全光線透過率がそれぞれ８０％以上であるとよい。また、各透明基材２０、３０の厚みは、特に制限はないが、採光具１００全体として窓材としての強度や取り扱い性を確保できる厚みであることが好ましく、例えば、それぞれ１ｍｍ～１０ｍｍであることが好ましい。 Each of the transparent base materials 20 and 30 is typically glass, but includes not only glass but also those generally used like glass such as reinforced plastic such as acrylic resin, and these single layers, or A laminate of these can be used. Each of the transparent base materials 20 and 30 only needs to have transparency enough to be used as a general window material. For example, a haze meter (Suga Test Instruments Co., Ltd. Fluorescence spectrophotometer F-4500) It is preferable that the total light transmittance measured in (1) is 80% or more. Further, the thickness of each of the transparent base materials 20 and 30 is not particularly limited, but is preferably a thickness that can ensure the strength and handleability as the window material as a whole of the daylighting tool 100, for example, 1 mm to 10 mm, respectively. It is preferable.
　各透明基材２０、３０の光制御部材１０と対向しない側の面２０ａ、３０ａは、室外に面している。その一方で、各透明基材２０、３０の光制御部材１０と対向する側の面２０ｂ、３０ｂには、当該透明基材２０、３０と光制御部材１０とを接合する接合層５０、６０が配置されている。図２に示す例では、第１透明基材２０と光制御部材１０との間に第１接合層５０が配置され、当該第１透明基材２０と光制御部材１０とを接合している。また、第２透明基材３０と光制御部材１０との間に第２接合層６０が配置され、当該第２透明基材３０と光制御部材１０とを接合している。各接合層５０、６０は、例えば、公知の接着剤を用いて形成することができる。なお、後述する光散乱層４０と同様の方法で粒子や空隙を含むことによって、接合層５０、６０が光を散乱するようにできる。 The surfaces 20a and 30a of the transparent base materials 20 and 30 on the side not facing the light control member 10 face the outside. On the other hand, bonding layers 50 and 60 for bonding the transparent base materials 20 and 30 and the light control member 10 are provided on the surfaces 20b and 30b of the transparent base materials 20 and 30 on the side facing the light control member 10. Has been placed. In the example illustrated in FIG. 2, the first bonding layer 50 is disposed between the first transparent base material 20 and the light control member 10, and the first transparent base material 20 and the light control member 10 are bonded together. Moreover, the 2nd joining layer 60 is arrange | positioned between the 2nd transparent base material 30 and the light control member 10, and the said 2nd transparent base material 30 and the light control member 10 are joined. Each joining layer 50 and 60 can be formed using a well-known adhesive agent, for example. Note that the bonding layers 50 and 60 can scatter light by including particles and voids in the same manner as the light scattering layer 40 described later.
　光散乱層４０は、少なくとも光制御部材１０と第１透明基材２０との間、及び光制御部材１０と第２透明基材３０との間のいずれか一方に配置され、層内に入射した光を散乱する。この例では、光散乱層４０は、光制御部材１０と第２透明基材３０との間に配置されている。なお、光散乱層４０は、光制御部材１０と第１透明基材２０との間に配置されていてもよい。光散乱層４０を設けることにより、採光具１００を通じて室外から室内に導かれる光が光散乱層４０により拡散され、観察者に与えるギラツキを低減することができる。なお、光散乱層４０が接着剤を含むことによって、接合層６０を設けずに、光散乱層４０が、第１透明基材２０及び第２透明基材３０の少なくとも一方と光制御部材１０とを接合するようにできる。 The light scattering layer 40 is disposed at least between the light control member 10 and the first transparent base material 20 and between the light control member 10 and the second transparent base material 30, and enters the layer. Scatter light. In this example, the light scattering layer 40 is disposed between the light control member 10 and the second transparent substrate 30. The light scattering layer 40 may be disposed between the light control member 10 and the first transparent substrate 20. By providing the light scattering layer 40, the light guided from the outside to the room through the daylighting tool 100 is diffused by the light scattering layer 40, and glare given to the observer can be reduced. In addition, when the light-scattering layer 40 contains an adhesive, the light-scattering layer 40 includes at least one of the first transparent substrate 20 and the second transparent substrate 30 and the light control member 10 without providing the bonding layer 60. Can be joined.
　光散乱層４０の第１の態様としては、層の内部に粒子を含むものを挙げることができる。粒子としては、例えば、シリカ、炭酸カルシウム、アクリル等の中空粒子や、酸化チタン、硫酸バリウム、酸化マグネシウム、タルク等のフィラーや、アクリル、ウレタン、ガラス等のビーズを用いることができる。球状の粒子が好ましい。 As a 1st aspect of the light-scattering layer 40, what contains particle | grains inside a layer can be mentioned. As particles, for example, hollow particles such as silica, calcium carbonate, and acrylic, fillers such as titanium oxide, barium sulfate, magnesium oxide, and talc, and beads such as acrylic, urethane, and glass can be used. Spherical particles are preferred.
　光散乱層４０は、これらの粒子を樹脂に適宜分散して形成することができる。可視域の光を効率良く散乱させるために、粒子の平均最大幅を２００ｎｍ～５０μｍの範囲のものを主に用いることが好ましい。なお、粒子の平均最大幅は、走査型電子顕微鏡（ＳＥＭ）により測定した値である。 The light scattering layer 40 can be formed by appropriately dispersing these particles in a resin. In order to efficiently scatter light in the visible range, it is preferable to mainly use particles whose average maximum width is in the range of 200 nm to 50 μm. The average maximum width of the particles is a value measured with a scanning electron microscope (SEM).
　光散乱層４０の第２の態様としては、層内に空隙を含むものを挙げることができる。層内に空隙を形成するには、例えば、樹脂を溶融押出成形法によりフィルム成膜し冷却後に、二軸延伸させて配向して、熱固定により結晶化させて微細な気泡を生じさせるようにしてもよい。このような光散乱層４０としては、空隙を有する白色ポリエチレンテレフタレート（ＰＥＴ）フィルムが好適に用いられる。 As a 2nd aspect of the light-scattering layer 40, what contains a space | gap in a layer can be mentioned. In order to form voids in the layer, for example, the resin is formed into a film by a melt extrusion molding method, cooled, then biaxially stretched and oriented, and crystallized by heat setting to generate fine bubbles. May be. As such a light scattering layer 40, a white polyethylene terephthalate (PET) film having voids is preferably used.
　光散乱層４０の厚みは、特に制限はないが、加工性や光学特性の観点から０．５μｍ～１００μｍであることが好ましい。なお、光散乱層４０は、上述の第１の態様と第２の態様との両方の性質を備えていてもよい。 The thickness of the light scattering layer 40 is not particularly limited, but is preferably 0.5 μm to 100 μm from the viewpoint of processability and optical characteristics. In addition, the light-scattering layer 40 may be provided with the property of both the above-mentioned 1st aspect and a 2nd aspect.
　光散乱層４０としては、上述以外の態様として、擦りガラスや型板ガラスを用いてもよい。 As the light-scattering layer 40, a frosted glass or a template glass may be used as a mode other than the above.
　このように構成された採光具１００は、ＪＩＳ－Ｋ７３６１－１に準拠して測定されるヘーズ（ヘイズ、Ｈａｚｅ）値が３０％以上９５％以下に設定されることが好ましい。ヘーズ値が３０％未満であると防眩性が不足する場合があり、またヘーズ値が９５％を越えると採光性が不足する場合があるからである。なかでも、ヘーズ値を３５％以上８０％以下とすることがより好ましい。一例として、採光具１００のヘーズ値は、ヘーズメーター（スガ試験機（株）社製 蛍光分光光度計 Ｆ－４５００）を用いて測定可能である。 It is preferable that the daylighting tool 100 configured as described above has a haze value measured in accordance with JIS-K7361-1 set to 30% or more and 95% or less. This is because if the haze value is less than 30%, the antiglare property may be insufficient, and if the haze value exceeds 95%, the daylighting property may be insufficient. In particular, the haze value is more preferably 35% or more and 80% or less. As an example, the haze value of the daylighting tool 100 can be measured using a haze meter (Suga Test Instruments Co., Ltd. Fluorescence spectrophotometer F-4500).
　次に、このような構成からなる採光具１００の作用について説明する。 Next, the operation of the daylighting tool 100 having such a configuration will be described.
　光制御部材１０の第１面１０ａへの法線方向ｎｄに対して紙面の上側に傾斜した方向から入射する光Ｌ１は、反射面１０ｃで反射しその進行方向を大きく変化させられる。その一方で、第１面１０ａへの法線方向ｎｄに概ね沿った方向から入射する光Ｌ２は、主として反射面１０ｃに入射せずに高屈折率媒質部１２内を透過していく。 The light L1 incident from the direction inclined upward of the paper surface with respect to the normal direction nd to the first surface 10a of the light control member 10 is reflected by the reflecting surface 10c and its traveling direction is greatly changed. On the other hand, the light L2 incident from the direction substantially along the normal direction nd to the first surface 10a is transmitted through the high refractive index medium portion 12 without mainly entering the reflecting surface 10c.
　その後、これらの光Ｌ１、Ｌ２は、光散乱層４０にて拡散されて第２ガラス基材３０から屋内に向かって出射していく。 Thereafter, these lights L1 and L2 are diffused by the light scattering layer 40 and are emitted indoors from the second glass substrate 30.
　以上のように、本実施の形態による採光具１００は、光散乱層４０を有している。この場合、光制御部材１０内で反射や屈折をした光を光散乱層４０にて拡散して室内に取り込むことができる。これにより、室内にいる観察者が採光具１００を介して室外を観たときに、光制御部材１０による反射や屈折に起因して生じ得るぎらつきや眩しさを感じることを緩和することができる。 As described above, the daylighting tool 100 according to the present embodiment has the light scattering layer 40. In this case, the light reflected or refracted in the light control member 10 can be diffused by the light scattering layer 40 and taken into the room. Thereby, when the observer who is indoors sees the outdoor through the lighting tool 100, it can relieve the feeling of glare and glare that may occur due to reflection and refraction by the light control member 10. .
（第１の実施の形態の変形例）
　次に、第１の実施の形態に係る採光具の変形例について説明をする。以下の説明では、上述した実施の形態と同様に構成され得る部分について、上述の実施の形態における対応する部分に対して用いた符号と同一の符号を用いることとし、重複する説明を省略する。 (Modification of the first embodiment)
Next, a modification of the daylighting tool according to the first embodiment will be described. In the following description, the same reference numerals as those used for the corresponding parts in the above-described embodiment are used for the parts that can be configured in the same manner as in the above-described embodiment, and redundant description is omitted.
　図３は、第１の実施の形態に係る採光具の一変形例を説明する断面図である。図３に示す採光具２００は、光散乱層４０が光制御部材１０に直接接して支持層の役割を担う点が異なり、その他の点については図２に示す採光具１００と略同様である。 FIG. 3 is a cross-sectional view illustrating a modification of the daylighting tool according to the first embodiment. The lighting tool 200 shown in FIG. 3 is different from the lighting tool 100 shown in FIG. 2 in that the light scattering layer 40 directly contacts the light control member 10 and serves as a support layer.
　採光具２００は、光制御部材１０と、光制御部材１０の第１面１０ａ側に配置された第１透明基材２０と、光制御部材１０の第２面１０ｂ側に配置された第２透明基材３０と、を有し、光制御部材１０と第１透明基材２０との間、及び光制御部材１０と第２透明基材３０との間の少なくとも一方に、光を散乱する光散乱層４０が配置され、光制御部材１０と光散乱層４０とが直接接している。 The lighting tool 200 includes a light control member 10, a first transparent substrate 20 disposed on the first surface 10 a side of the light control member 10, and a second transparent disposed on the second surface 10 b side of the light control member 10. A light scattering member that scatters light between at least one of the light control member 10 and the first transparent substrate 20 and between the light control member 10 and the second transparent substrate 30. The layer 40 is disposed, and the light control member 10 and the light scattering layer 40 are in direct contact with each other.
　以上のように、採光具２００は、光散乱層４０を有することにより、採光具２００を通じて室外から室内に導かれる光が光散乱層４０により拡散され、観察者に与えるギラツキを低減することができ、かつ、光散乱層４０が、光制御部材１０に直接接し支持層の役割を担うことにより、採光具２００の構成を簡便化でき、かつ厚みを低減することができる。 As described above, the daylighting tool 200 includes the light scattering layer 40, whereby light guided from the outside to the room through the daylighting tool 200 is diffused by the light scattering layer 40, and glare given to the observer can be reduced. And since the light-scattering layer 40 contacts the light control member 10 directly and plays the role of a support layer, the structure of the lighting tool 200 can be simplified and thickness can be reduced.
　さらに、図４を参照して第１の実施の形態に係る採光具の別の変形例について説明をする。図４は、第１の実施の形態に係る採光具の別の変形例を説明する断面図である。図４に示す採光具３００は、光散乱層４０が光制御部材１０と第１透明基材２０の間にも配置されている点が異なり、その他の点については図２に示す採光具１００と略同様である。 Furthermore, another modified example of the daylighting tool according to the first embodiment will be described with reference to FIG. FIG. 4 is a cross-sectional view illustrating another modified example of the daylighting tool according to the first embodiment. The lighting tool 300 shown in FIG. 4 is different in that the light scattering layer 40 is also disposed between the light control member 10 and the first transparent substrate 20, and the other points are the same as those of the lighting tool 100 shown in FIG. It is substantially the same.
　採光具３００は、光制御部材１０と、光制御部材１０の第１面側１０ａに配置された第１透明基材２０と、光制御部材１０の第２面１０ｂ側に配置された第２透明基材３０と、を有し、光制御部材１０と第１透明基材２０との間、及び光制御部材１０と第２透明基材３０との間の両方に、光を散乱する光散乱層４０（第１光散乱層４０ａ、第２光散乱層４０ｂ）が配置されている。 The lighting tool 300 includes the light control member 10, the first transparent base material 20 disposed on the first surface side 10 a of the light control member 10, and the second transparent disposed on the second surface 10 b side of the light control member 10. A light scattering layer that scatters light both between the light control member 10 and the first transparent substrate 20 and between the light control member 10 and the second transparent substrate 30. 40 (first light scattering layer 40a, second light scattering layer 40b) are arranged.
　第１光散乱層４０ａと第２光散乱層４０ｂとは、略同様に構成されてもよいが、とりわけ、第１光散乱層４０ａのヘーズの値が第２光散乱層４０ｂのヘーズの値よりも低いことが好ましい。このような構成にすると、採光性と防眩性を両立できるからである。 The first light scattering layer 40a and the second light scattering layer 40b may be configured in substantially the same manner. In particular, the haze value of the first light scattering layer 40a is greater than the haze value of the second light scattering layer 40b. Is preferably low. This is because such a configuration can achieve both daylighting and anti-glare properties.
　以上のように、採光具３００は、光散乱層として第１光散乱層４０ａ及び第２光散乱層４０ｂを有することにより、採光具３００を通じて室外から室内に導かれる光が第１光散乱層４０ａ及び第２光散乱層４０ｂにより拡散され、観察者に与えるギラツキを低減することができる。 As described above, the lighting tool 300 includes the first light scattering layer 40a and the second light scattering layer 40b as the light scattering layers, so that the light guided from the outdoor to the indoor through the lighting tool 300 is the first light scattering layer 40a. Further, it is possible to reduce glare that is diffused by the second light scattering layer 40b and given to the observer.
（第２の実施の形態）
　次に、図５を参照して本発明の第２の実施の形態について説明する。図５は、第２の実施の形態による採光具を説明する断面図である。図５を参照して説明する第２の実施の形態は、光散乱層４０の代わりに防眩層１４０が配置されている点で異なるが、その他の構成は、第１の実施形態と同様に構成することができる。 (Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view for explaining a daylighting tool according to the second embodiment. The second embodiment described with reference to FIG. 5 is different in that an anti-glare layer 140 is disposed instead of the light scattering layer 40, but other configurations are the same as in the first embodiment. Can be configured.
　図５に示す採光具４００は、光制御部材１０と、光制御部材１０の第１面側１０ａに配置された第１透明基材２０と、光制御部材１０の第２面１０ｂ側に配置された第２透明基材３０と、を有し、第１透明基材１０及び第２透明基材２０のうちの少なくとも一方の、光制御部材１０に対向しない側に、凹凸構造を有する防眩層１４０が配置されている。光制御部材１０、第１透明基材２０及び第２透明基材３０については、上述した第１の実施の形態と略同様なため、ここでは詳細な説明を省略する。 The lighting tool 400 illustrated in FIG. 5 is disposed on the light control member 10, the first transparent base material 20 disposed on the first surface side 10 a of the light control member 10, and the second surface 10 b side of the light control member 10. The antiglare layer having a concavo-convex structure on at least one of the first transparent substrate 10 and the second transparent substrate 20 that does not face the light control member 10. 140 is arranged. About the light control member 10, the 1st transparent base material 20, and the 2nd transparent base material 30, since it is substantially the same as 1st Embodiment mentioned above, detailed description is abbreviate | omitted here.
　防眩層１４０は、少なくとも第１透明基材２０と第２透明基材３０のいずれか一方に配置され、透明基材に接しない側に凹凸構造を有する。この例では、防眩層１４０は、第２透明基材３０の光制御部材１０と対向しない側の面３０ａに配置されている。なお、防眩層１４０を第１透明基材２０側に配置してもよい。防眩層１４０を設けることにより、採光具１００を通じて室外から室内に導かれる光が防眩層１４０により拡散され、観察者に与えるギラツキを低減することができる。 The anti-glare layer 140 is disposed on at least one of the first transparent substrate 20 and the second transparent substrate 30 and has a concavo-convex structure on the side not in contact with the transparent substrate. In this example, the antiglare layer 140 is disposed on the surface 30 a of the second transparent base material 30 on the side that does not face the light control member 10. The antiglare layer 140 may be disposed on the first transparent substrate 20 side. By providing the anti-glare layer 140, the light guided from the outdoor to the indoor through the daylighting tool 100 is diffused by the anti-glare layer 140, and glare given to the observer can be reduced.
　防眩層１４０としては、表面にビーズ等を配した凹凸構造を有する市販のフィルム（いわゆるヘーズフィルム（Haze Film）と呼ばれるもの；恵和（株）社製ＯＰＡＬＵＳ等）、表面をエンボス加工したフィルムなどを用いることができる。防眩層１４０が有する凹凸構造としては、例えば、走査型白色干渉計 Ｚｙｇｏ（ キヤノン（株）社製ＮｅｗＶｉｅｗ６３００）で測定したＲａ（算術平均粗さ）が０．０１μｍ以上であることが好ましい。より好ましくは０．０５μｍ～１．０μｍであるとよい。防眩層１４０の厚みは、特に制限はないが、加工性や光学特性の観点から０．５μｍ～１００μｍであることが好ましい。 As the anti-glare layer 140, a commercially available film having a concavo-convex structure with beads or the like on the surface (what is called a haze film); an embossed film on the surface Etc. can be used. As an uneven | corrugated structure which the glare-proof layer 140 has, it is preferable that Ra (arithmetic mean roughness) measured with the scanning type white interferometer Zygo (New View 6300 by the Canon Inc.) is 0.01 micrometer or more, for example. More preferably, the thickness is 0.05 μm to 1.0 μm. The thickness of the antiglare layer 140 is not particularly limited, but is preferably 0.5 μm to 100 μm from the viewpoint of processability and optical characteristics.
　防眩層１４０としては、擦りガラスや型板ガラスを用いてもよい。擦りガラスは片側又は両側の表面に擦り模様が付されたガラスであり、その擦り模様は例えばガラスの表面にサンドブラスト処理および化学処理をすることによって伏すことができる。また、型板ガラスは片側又は両側の表面に型模様が付けられたガラスであり、その型模様は例えば溶融ガラスを一方又は両方に型を有するロールどうしの間を通すことよって付すことができる。 As the antiglare layer 140, rubbed glass or template glass may be used. The rubbed glass is a glass having a rubbed pattern on one or both surfaces, and the rubbed pattern can be laid down by, for example, sandblasting and chemical treatment of the glass surface. Further, the template glass is glass having a pattern on one or both surfaces, and the pattern can be applied, for example, by passing molten glass between rolls having a mold on one or both sides.
　このように構成された採光具４００は、ＪＩＳ－Ｋ７３６１－１に準拠して測定されるヘーズ（Ｈａｚｅ）値が３０％以上９５％以下に設定されることが好ましい。ヘーズ値が３０％未満であると防眩性が不足する場合があり、またヘーズ値が９５％を越えると採光性が不足する場合があるからである。なかでも、ヘーズ値を３５％以上８０％以下とすることがより好ましい。 It is preferable that the lighting tool 400 configured as described above has a haze value measured in accordance with JIS-K7361-1 set to 30% or more and 95% or less. This is because if the haze value is less than 30%, the antiglare property may be insufficient, and if the haze value exceeds 95%, the daylighting property may be insufficient. In particular, the haze value is more preferably 35% or more and 80% or less.
　次に、このような構成からなる採光具４００の作用について説明する。 Next, the operation of the daylighting tool 400 having such a configuration will be described.
　光制御部材１０の第１面１０ａへの法線方向ｎｄに対して紙面の上側に傾斜した方向から入射する光Ｌ１は、反射面１０ｃで反射しその進行方向を大きく変化させられる。その一方で、第１面１０ａへの法線方向ｎｄに概ね沿った方向から入射する光Ｌ２は、主として反射面１０ｃに入射せずに高屈折率媒質部１２内を透過していく。 The light L1 incident from the direction inclined upward of the paper surface with respect to the normal direction nd to the first surface 10a of the light control member 10 is reflected by the reflecting surface 10c and its traveling direction is greatly changed. On the other hand, the light L2 incident from the direction substantially along the normal direction nd to the first surface 10a is transmitted through the high refractive index medium portion 12 without mainly entering the reflecting surface 10c.
　その後、これらの光Ｌ１、Ｌ２は、防眩層１４０にて拡散されて屋内に向かって出射していく。 Thereafter, these lights L1 and L2 are diffused by the anti-glare layer 140 and are emitted indoors.
　以上のように、本実施の形態による採光具１００は、防眩層１４０を有している。この場合、光制御部材１０内で反射や屈折をした光を防眩層１４０にて拡散して室内に取り込むことができる。これにより、室内にいる観察者が採光具１００を介して室外を観たときに、光制御部材１０による反射や屈折に起因して生じ得るぎらつきや眩しさを感じることを緩和することができる。 As described above, the daylighting tool 100 according to the present embodiment has the antiglare layer 140. In this case, the light reflected or refracted in the light control member 10 can be diffused by the antiglare layer 140 and taken into the room. Thereby, when the observer who is indoors sees the outdoor through the lighting tool 100, it can relieve the feeling of glare and glare that may occur due to reflection and refraction by the light control member 10. .
　なお、第１透明基材２０および第２透明基材３０として、防眩性を有する基材、例えば、擦りガラス、型板ガラスなどを用いてもよい。この場合、光制御部材１０の防眩機能をさらに高めることができる。 In addition, as the 1st transparent base material 20 and the 2nd transparent base material 30, you may use the base material which has anti-glare property, for example, a rubbed glass, a template glass, etc. In this case, the antiglare function of the light control member 10 can be further enhanced.
（第２の実施の形態の変形例）
　次に、第２の実施の形態に係る採光具の変形例について説明をする。以下の説明では、上述した実施の形態と同様に構成され得る部分について、上述の実施の形態における対応する部分に対して用いた符号と同一の符号を用いることとし、重複する説明を省略する。 (Modification of the second embodiment)
Next, a modification of the daylighting tool according to the second embodiment will be described. In the following description, the same reference numerals as those used for the corresponding parts in the above-described embodiment are used for the parts that can be configured in the same manner as in the above-described embodiment, and redundant description is omitted.
　図６は、第２の実施の形態に係る採光具の一変形例を説明する断面図である。図６に示す採光具５００は、防眩層が第１透明基材２０側にも配置されている点が異なり、その他の点については図５に示す採光具４００と略同様である。 FIG. 6 is a cross-sectional view illustrating a modification of the daylighting tool according to the second embodiment. The daylighting tool 500 shown in FIG. 6 is different from the daylighting tool 400 shown in FIG. 5 in that the antiglare layer is also disposed on the first transparent base material 20 side.
　採光具５００は、光制御部材１０と、光制御部材１０の第１面側１０ａに配置された第１透明基材２０と、光制御部材１０の第２面１０ｂ側に配置された第２透明基材３０と、を有し、第１透明基材２０及び第２透明基材３０の両方の、光制御部材１０に対向しない側に凹凸構造を有する防眩層１４０（第１防眩層１４０ａ、第２防眩層１４０ｂ）が配置されている。 The lighting tool 500 includes a light control member 10, a first transparent substrate 20 disposed on the first surface side 10 a of the light control member 10, and a second transparent disposed on the second surface 10 b side of the light control member 10. And an anti-glare layer 140 having a concavo-convex structure on both sides of the first transparent substrate 20 and the second transparent substrate 30 not facing the light control member 10 (first anti-glare layer 140a). The second antiglare layer 140b) is disposed.
　第１防眩層１４０ａと第２防眩層１４０ｂとは、略同様に構成されてもよいが、とりわけ、第１防眩層１４０ａのヘーズ値が、第２防眩層１４０ｂのヘーズ値よりも低いことが好ましい。このような構成にすると、採光性と防眩性を両立できるからである。 The first anti-glare layer 140a and the second anti-glare layer 140b may be configured in substantially the same manner. In particular, the haze value of the first anti-glare layer 140a is greater than the haze value of the second anti-glare layer 140b. Preferably it is low. This is because such a configuration can achieve both daylighting and anti-glare properties.
　以上のように、採光具５００は、防眩層として第１防眩層１４０ａ及び第２防眩層１４０ｂを有することにより、採光具５００を通じて室外から室内に導かれる光が第１防眩層１４０ａ及び第２防眩層１４０ｂにより拡散され、観察者に与えるギラツキを低減することができる。 As described above, the lighting tool 500 includes the first anti-glare layer 140a and the second anti-glare layer 140b as the anti-glare layer, so that the light guided from the outdoor to the indoor through the lighting tool 500 is the first anti-glare layer 140a. Further, it is possible to reduce glare that is diffused by the second anti-glare layer 140b and given to the observer.

Claims (9)

  1. 　光が入射する第１面、前記第１面に対向し光が出射する第２面、及び、前記第１面と前記第２面との間に存在し、前記第１面から入射した光を前記第２面に向けて偏向する反射面、を含む光制御部材と、
    　前記光制御部材の前記第１面側に配置された第１透明基材と、
    　前記光制御部材の前記第２面側に配置された第２透明基材と、
    を備え、
    　前記光制御部材と前記第１透明基材との間、及び前記光制御部材と前記第２透明基材との間の少なくとも一方に、光を散乱する光散乱層が配置されている、採光具。     A first surface on which light is incident, a second surface that faces the first surface and emits light, and exists between the first surface and the second surface, and incident light from the first surface. A light control member including a reflective surface that deflects toward the second surface;
    A first transparent substrate disposed on the first surface side of the light control member;
    A second transparent substrate disposed on the second surface side of the light control member;
    With
    A lighting tool in which a light scattering layer that scatters light is disposed between at least one of the light control member and the first transparent substrate and between the light control member and the second transparent substrate. .
  2. 　前記光散乱層は、内部に粒子を有する、請求項１に記載の採光具。 The lighting tool according to claim 1, wherein the light scattering layer has particles inside.
  3. 　前記光散乱層は、内部に空隙を有する、請求項１又は２に記載の採光具。 The lighting tool according to claim 1 or 2, wherein the light scattering layer has a void inside.
  4. 　光が入射する第１面、前記第１面に対向し光が出射する第２面、前記第１面と前記第２面との間に存在し、前記第１面から入射した光を前記第２面に向けて偏向する反射面、を含む光制御部材と、
    　前記光制御部材の前記第１面側に配置された第１透明基材と、
    　前記光制御部材の前記第２面側に配置された第２透明基材と、
    を備え、
    　前記第１透明基材及び前記第２透明基材のうちの少なくとも一方の、前記光制御部材に対向しない側に、凹凸構造を有する防眩層が配置されている、採光具。     A first surface on which light is incident, a second surface that faces the first surface and emits light, and exists between the first surface and the second surface, and the light incident from the first surface is A light control member including a reflective surface that deflects toward two surfaces;
    A first transparent substrate disposed on the first surface side of the light control member;
    A second transparent substrate disposed on the second surface side of the light control member;
    With
    A lighting tool in which an antiglare layer having a concavo-convex structure is disposed on a side of at least one of the first transparent base and the second transparent base that does not face the light control member.
  5. 　前記第１透明基材及び前記第２透明基材の両方の、前記光制御部材に対向しない側に、凹凸構造を有する防眩層が配置されている、請求項４記載の採光具。 The daylighting tool according to claim 4, wherein an antiglare layer having a concavo-convex structure is disposed on a side of the first transparent base and the second transparent base that are not opposed to the light control member.
  6. 　当該採光具は、ＪＩＳ－Ｋ７３６１－１に準拠して測定されるヘーズ値が３０％以上９５％以下である、請求項１または４に記載の採光具。 The lighting tool according to claim 1 or 4, wherein the lighting tool has a haze value of 30% or more and 95% or less measured in accordance with JIS-K7361-1.
  7. 　前記第１透明基材と前記光制御部材との間に配置され、且つ、前記第１透明基材と前記光制御部材とを接合する第１接合層と、
    　前記第２透明基材と前記光制御部材との間に配置され、且つ、前記第２透明基材と前記光制御部材とを接合する第２接合層と、
    をさらに備える、請求項１または４に記載の採光具。     A first bonding layer disposed between the first transparent substrate and the light control member, and bonding the first transparent substrate and the light control member;
    A second bonding layer disposed between the second transparent substrate and the light control member, and bonding the second transparent substrate and the light control member;
    The lighting tool according to claim 1, further comprising:
  8. 　前記第１接合層及び前記第２接合層の少なくとも一方が光を散乱する、請求項７に記載の採光具。 The lighting tool according to claim 7, wherein at least one of the first bonding layer and the second bonding layer scatters light.
  9. 　前記光散乱層が、前記第１透明基材及び前記第２透明基材の少なくとも一方と前記光制御部材とを接合する、請求項１に記載の採光具。 The lighting tool according to claim 1, wherein the light scattering layer joins the light control member and at least one of the first transparent substrate and the second transparent substrate.
PCT/JP2015/054171 2014-02-20 2015-02-16 Lighting implement WO2015125741A1 (en)

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WO2012134787A2 (en) * 2011-03-30 2012-10-04 3M Innovative Properties Company Hybrid light redirecting and light diffusing constructions
US20130265642A1 (en) * 2012-04-06 2013-10-10 Sergiy Vasylyev Daylighting fabric and method of making the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020073950A (en) * 2019-09-04 2020-05-14 大日本印刷株式会社 Daylighting sheet

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