WO2019138770A1

WO2019138770A1 - Natural-light capturing device

Info

Publication number: WO2019138770A1
Application number: PCT/JP2018/045890
Authority: WO
Inventors: 俊平西中; 透菅野; 俊植木
Original assignee: シャープ株式会社
Priority date: 2018-01-09
Filing date: 2018-12-13
Publication date: 2019-07-18
Also published as: JP2021057099A

Abstract

Provided is a natural-light capturing device that can suppress glare on the outdoor side. The natural-light capturing device is provided with: a natural-light capturing member that brings incident outdoor light into a room interior; and an optical member that is provided on the incident side of the natural-light capturing member. The natural-light capturing member is provided with: a substrate which has a light transmissive property and to which the outdoor light is incident; and a natural-light capturing layer which is provided on the substrate and which has a plurality of natural-light capturing parts having a light transmissive property and low refractive index parts provided between the plurality of natural-light capturing parts. A portion of the outdoor light is reflected by the natural-light capturing member, enters the optical member as first light rays and exits therefrom as second light rays heading in the travel direction of the first light rays. The intensity of the second light rays is reduced relative to the intensity of the first light rays.

Description

Daylighting device

The present invention relates to a daylighting device.
Priority is claimed on Japanese Patent Application No. 2018-001395, filed Jan. 9, 2018, the content of which is incorporated herein by reference.

DESCRIPTION OF RELATED ART The daylighting apparatus for taking in sunlight (external light) indoors through the window of a building etc. is known. For example, in Patent Document 1, a daylighting surface material having an outdoor side plate and a multi-layered indoor side plate configured of a light transmission plate disposed on the outdoor side and the indoor side with an air layer separated, or a diffusion plate for diffusing transmitted light. (Lighting device) is described. The indoor side plate sandwiches the refractive material layer between the light transmission plate and the diffusion plate or between the plurality of diffusion plates.

In the light-receiving surface material described in Patent Document 1, incident light transmitted downward through the outdoor side plate is refracted into upward light by the refractive material layer provided on the indoor side plate, and the upward light is reflected from the indoor side plate. It becomes diffused light by transmitting through the diffusion plate. Thereby, the light from the outside can be taken in to the back of the room.

Patent No. 5829711

However, in the daylighting surface material having a diffusion plate as described in Patent Document 1, in the outdoor direction, the sunlight is reflected by the surface on the outdoor side of the daylighting surface material in addition to the light traveling in the indoor direction. It may be light that travels. When this reflected light enters the eyes of the person outside the room, the person may feel unpleasant glare. In the following description, light that causes unpleasant glare is referred to as glare.

One aspect of the present invention is made in view of such a situation, and an object of the present invention is to provide a daylighting device capable of suppressing glare outside the room.

In order to solve the above-mentioned subject, one mode of the present invention is provided with the daylighting member which takes in the exterior light which entered into a room, and the optical member provided in the incidence side of the daylighting member, and the daylighting member is light transmittance A substrate on which ambient light is incident, and a light collecting layer provided on the substrate and having a plurality of light transmitting portions having light transparency and a low refractive index portion provided between the plurality of light collecting portions; In the optical member, the first light beam in which a part of the external light is reflected by the light receiving member is incident, and the intensity of the second light beam emitted from the optical member and traveling in the traveling direction of the first light beam is greater than the intensity of the first light beam To provide a daylighting device that reduces the

In one aspect of the present invention, the optical member may be configured to transmit and diffuse the first light beam.

In one aspect of the present invention, the low refractive index portion may be air.

In one aspect of the present invention, a support member may be provided to support at least the optical member on the light collecting member.

In one aspect of the present invention, the support member may be configured to support the optical member on at least a part of the outer peripheral edge of the light collection member.

In one aspect of the present invention, the support member may be configured to support at least a part of the outer peripheral edge of the optical member.

In one aspect of the present invention, the optical member includes optical parts of a plurality of areas extending in a direction intersecting with the arrangement direction of the plurality of light collecting parts, and light transmitting parts of the plurality of areas. The optical unit may be provided in an area other than the optical unit.

In one aspect of the present invention, the optical member may be configured to include a holding member capable of holding the incident surface of the optical member with respect to the incident surface of the light collecting member.

In one aspect of the present invention, the optical member may be configured to include a plurality of members extending in a direction intersecting the arrangement direction of the plurality of light collecting units.

In one aspect of the present invention, the holding member may have a pivoting axis, and the optical member may be pivotably held by the pivoting axis.

In one aspect of the present invention, the optical member may be removable.

According to an aspect of the present invention, there is provided a daylighting device capable of suppressing glare outdoors.

FIG. 1 is a cross-sectional view showing the configuration of the daylighting device of the first embodiment. FIG. 2 is a cross-sectional view showing the configuration of a daylighting apparatus according to a second embodiment. FIG. 3 is a cross-sectional view showing the configuration of a daylighting apparatus according to a third embodiment. FIG. 4 is a cross-sectional view showing the configuration of a daylighting apparatus according to a fourth embodiment. FIG. 5A is a cross-sectional view showing a configuration of a daylighting device of a fifth embodiment. FIG. 5B is a front view in a field of view from the X direction of FIG. 5A. FIG. 6A is a view of the state in which only sunlight collecting member 10 is irradiated with sunlight as viewed from the outdoor side. FIG. 6B is a view of the daylighting device 104 according to the fifth embodiment as it is viewed from the outdoor side. FIG. 7 is a cross-sectional view showing a configuration of a daylighting apparatus of a sixth embodiment. FIG. 8A is a view showing a modification of the installation place of the holding member 50 of the sixth embodiment. FIG. 8B is a view showing a modification of the installation place of the holding member 50 of the sixth embodiment. FIG. 9 is a cross-sectional view showing a configuration of a daylighting apparatus of a seventh embodiment. FIG. 10A is a cross-sectional view showing a modification of the daylighting apparatus according to the embodiment of the present invention. FIG. 10B is a cross-sectional view showing a modification of the daylighting apparatus according to the embodiment of the present invention. FIG. 11A is a diagram showing the installation location of the daylighting device when the daylighting device according to the embodiment of the present invention is applied to a window of a building. FIG. 11B is a view showing the installation location of the daylighting device when the daylighting device of the embodiment of the present invention is applied to a window of a building.

Hereinafter, the daylighting device in each embodiment of the present invention is explained based on a drawing. In the drawings used in the following description, for the purpose of emphasizing the characteristic portions, the characteristic portions may be enlarged and shown for convenience, and the dimensional ratio of each component may be limited to the same as the actual Absent. Moreover, for the same purpose, there may be a case where parts which are not characteristic are omitted.

In the three-dimensional orthogonal coordinate system (XYZ coordinate system) appropriately shown in each drawing, the Z-axis direction is the vertical direction. The X-axis direction and the Y-axis direction are one direction in the horizontal direction orthogonal to the Z-axis direction, and are directions orthogonal to each other.

First Embodiment
[Lighting device]
FIG. 1 is a cross-sectional view showing the configuration of the daylighting device of the first embodiment. As shown in FIG. 1, the daylighting device 100 of the present embodiment includes a daylighting member 10 and an optical member 20.

[Lighting member]
The light collecting member 10 of the present embodiment is a window glass for taking in sunlight (external light) indoors in a state of being incorporated in an outdoor window frame, or a handrail having light transparency installed outdoors.

The light collecting member 10 of the present embodiment shown in FIG. 1 includes a first substrate 1, a second substrate 2, and a light collecting layer 4.
In the present specification, the second substrate 2 corresponds to the “substrate” in the claims.

In FIG. 1, the first substrate 1 and the second substrate 2 are disposed to face each other. The first substrate 1 is disposed on the outdoor side (−X side), and the second substrate 2 is disposed on the indoor side (+ X side). The first substrate 1 protects the light collecting layer 4. The peripheral portion of the first substrate 1 and the peripheral portion of the second substrate 2 are bonded by the seal member 5. The first substrate 1 and the second substrate 2 are each made of a glass substrate having optical transparency. The first substrate 1 and the second substrate 2 constitute a multilayer glass structure (pair glass structure).

A space surrounded by the first substrate 1, the second substrate 2 and the seal member 5 is a hollow heat insulating layer 6. The hollow heat insulating layer 6 is a layer made of air. In the present embodiment, the hollow heat insulating layer 6 may be a layer formed of an inert gas such as nitrogen, or may be a layer in a reduced pressure state.

The light collecting layer 4 shown in FIG. 1 is disposed in the hollow heat insulating layer 6. The light collection layer 4 is provided on one surface (a surface facing the first substrate 1, a surface on the −X side) 2 a of the second substrate 2. The light collecting layer 4 is a sheet on the surface of which a fine structure of several tens to several hundreds μm is formed so as to introduce the sunlight L 0 into the room.

The light collecting layer 4 shown in FIG. 1 has a film base 41, a plurality of light collecting parts 42, and a gap 43.
In the present specification, the void 43 corresponds to the "low refractive index portion" in the claims. Here, the “low refractive index portion” means a member having a lower refractive index than the light receiving portion 42.

The film substrate 41 is provided in contact with one surface 2 a of the second substrate 2. As the film base 41, for example, a light transmitting base containing a resin such as a thermoplastic resin, a thermosetting resin, or a photopolymerizable resin is used. As the light transmitting substrate, for example, a substrate comprising an acrylic polymer, an olefin polymer, a vinyl polymer, a cellulose polymer, an amide polymer, a fluorine polymer, a urethane polymer, a silicone polymer, an imide polymer, etc. Can be mentioned. Specifically, as the film substrate 41, for example, triacetyl cellulose (TAC) film, polyethylene terephthalate (PET) film, cycloolefin polymer (COP) film, polycarbonate (PC) film, polyethylene naphthalate (PEN) film, Polyether sulfone (PES) film, polyimide (PI) film and the like are preferably used.

The plurality of light collecting units 42 are provided in a stripe shape on the surface (surface 41 a) on the side of the hollow heat insulating layer 6 in the film base 41. Each of the plurality of light collecting units 42 extends in the Y direction (horizontal direction), and is arranged substantially parallel to each other in the Z direction (vertical direction).

The plurality of light collecting units 42 include, as a forming material, an organic material having light transparency and photosensitivity such as, for example, an acrylic resin, an epoxy resin, or a silicone resin. A mixture of these organic materials with a polymerization initiator, a coupling agent, a monomer, an organic solvent, or the like can be used as the forming material of the plurality of light collecting units 42. Furthermore, the polymerization initiator may contain other components such as stabilizers, inhibitors, plasticizers, optical brighteners, mold release agents, chain transfer agents, and other photopolymerizable monomers.

The refractive index of the plurality of light collecting units 42 is not particularly limited. For example, when the fluorine-based additive is mixed, the refractive index of the plurality of light collecting units 42 is about 1.35. In addition, the refractive index of the plurality of light collecting parts 42 when the composition of a conjugated system such as an allyl group is mixed is about 1.6. Therefore, the refractive indexes of the plurality of light collecting units 42 are, for example, 1.35 to 1.6.

The air gap 43 is provided between the plurality of light collecting units 42. The air in the hollow heat insulating layer 6 is present in the air gap 43. Therefore, the refractive index of the void 43 is about 1.0.

In the present embodiment, air in the hollow heat insulating layer 6 is present in the air gap 43, but the present invention is not limited to this. The refractive index of the air gap 43 may be lower than the refractive index of the light collecting unit 42.

In the light collection layer 4, first, sunlight L0 transmitted through the first substrate 1 is incident. Next, the incident sunlight L0 becomes light L3 which travels to the indoor side by reflection or refraction or the like on one surface of the plurality of light collecting units 42. Furthermore, the light L3 passes through the second substrate 2 and travels into the room. The light L3 that has traveled into the room can be brightened, for example, by being reflected by the ceiling surface of the room.

However, in the light collection layer 4, the sunlight L0 may be light traveling in the outdoor direction due to reflection on the surface of the outdoor side or the like. When this reflected light becomes glare and enters the eyes of the person outside the room, the person may feel unpleasant glare.
Here, a light ray in which a part of the sunlight L0 is reflected by the light collecting layer 4 is referred to as a "first light ray L1". A ray traveling in the direction of travel of the first ray L1 is referred to as a "second ray L2".

However, the optical path shown in FIG. 1 shows only one example of the final light traveling direction. In practice, stray light or the like may occur after the sunlight L0 is repeatedly reflected a plurality of times in the light collection layer 4. In addition, the second light ray L2 may be directed upward as well as downward as shown in FIG.

[Optical member]
The optical member 20 of the present embodiment is a member capable of suppressing glare outside the room. Specifically, the optical member 20 receives the first light beam L1 and is emitted from the optical member 20 and reduces the intensity of the second light beam L2 directed to the traveling direction of the first light beam L1 than the intensity of the first light beam L1 It is a member that

The optical member 20 of the present embodiment is provided on the incident side of the light collecting member 10 described above. The optical member 20 is disposed on one surface (a surface on the −X side) 1 a of the first substrate 1.

The optical member 20 can transmit and diffuse the first light beam L1. The diffusion direction of the first light beam L1 is not particularly limited. As such an optical member 20, a base having light transmission (hereinafter, diffusion base) having a concavo-convex structure formed on the surface (hereinafter, diffusion base), a film having light transmission and diffusion (hereinafter, diffusion film) or light transmission The member etc. which laminated the said diffusion film on the base material which has a property are mentioned.

Also, the means for reducing the light intensity of the first light beam L1 is not limited to this, for example, means for absorbing light with a color film, or means for reflecting a part of the first light beam L1 with a half mirror, etc. I do not care.

Although it does not specifically limit as a base material which has light transmittance, For example, the base material which contains glass or resin as a forming material is mentioned. Moreover, the concavo-convex structure which exists in the surface of the said base material may be formed of the well-known surface processing process. Moreover, in the case of the base material which contains resin as a forming material, you may form by making the resin contain a well-known filler.

An adhesive layer 3 for fixing to the light collecting member 10 is provided on one surface (a surface facing the first substrate 1) 20 a of the optical member 20. Examples of the pressure-sensitive adhesive layer 3 include acrylic pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, polyester-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, and rubber-based pressure-sensitive adhesives. Among these, acrylic pressure-sensitive adhesives are suitably used.

In addition, although illustration is abbreviate | omitted in FIG. 1, when sunlight L0 permeate | transmits the optical member 20, it spread | diffuses. The traveling direction of the sunlight L0 shown in FIG. 1 represents the traveling direction of part of the light diffused by the optical member 20.

[Manufacturing method of a daylighting device]
An example of the manufacturing method of the daylighting apparatus 100 of this embodiment is demonstrated. First, the light collection layer 4 is formed on one surface 2 a of the second substrate 2. Examples of a method of forming the plurality of light collecting portions 42 of the light collecting layer 4 include a thermal imprint method, a UV imprint method, a heat press method, an injection molding method, an extrusion molding method, a compression molding method and the like. Next, the peripheral portion of the first substrate 1 and the peripheral portion of the second substrate 2 on which the light collecting layer 4 is formed are bonded by the seal member 5 to obtain the light collecting member 10. Next, the optical member 20 is fixed to one surface 1 a of the first substrate 1 of the light collecting member 10 via the adhesive layer 3 to obtain the light collecting device 100.

In the light collecting apparatus 100 of the present embodiment, a light diffusion layer may be provided on the other surface (the surface on the + X side) 1 b of the first substrate 1. In that case, the diffusion characteristic of the optical member 20 of the present embodiment may be lower than the diffusion characteristic of the light diffusion layer. This is because the intensity of the first light beam L1 incident on the optical member 20 is lower than the intensity of light incident on the light diffusion layer, and the optical member 20 need not diffuse light as much as the light diffusion layer.

According to the lighting device 100 of the first embodiment, glare on the outside can be suppressed.

Second Embodiment
FIG. 2 is a cross-sectional view showing the configuration of a daylighting apparatus according to a second embodiment. As shown in FIG. 2, the light collecting apparatus 101 of the present embodiment includes a light collecting member 10, an optical member 20, and a support member 30. Therefore, in the present embodiment, the same components as in the first embodiment will be assigned the same reference numerals and detailed explanations thereof will be omitted.

The support member 30 supports the optical member 20 on the light collecting member 10. For the support member 30, a fastener such as a screw is used. The optical member 20 and the first substrate 1 are fixed by the support member 30. The optical member 20 is provided with a through hole 20H penetrating in the thickness direction. A hole 1 H is provided in a portion overlapping the through hole 20 H of the first substrate 1. The support member 30 is fixed to the hole 1H through the through hole 20H.

The forming material of the support member 30 is not particularly limited as long as the material has a strength capable of supporting the optical member 20 on the light collecting member 10. Since the light collecting apparatus 101 of the present embodiment is used in a state of being incorporated into an outdoor window frame, it is preferable that the above-mentioned forming material has resistance to rain water and external light. As the above-mentioned formation material, a metal is mentioned, for example, and alloys, such as stainless steel (SUS), are preferred.

Unlike the case where the light collecting apparatus 101 of the second embodiment is fixed to the light collecting member 10 by the adhesive layer 3 as in the first embodiment by including the support member 30, the optical member 20 can be easily made as needed. It is removable. Accordingly, it becomes easy to remove the optical member 20 or replace the optical member 20 with another optical member according to the purpose.

According to the daylighting device 101 of the second embodiment, glare on the outside can be suppressed. Further, by providing the support member 30, the optical member 20 can be easily attached and detached as needed.

Third Embodiment
FIG. 3 is a cross-sectional view showing the configuration of a daylighting apparatus according to a third embodiment. As shown in FIG. 3, the daylighting device 102 of the present embodiment includes the daylighting member 10, the optical member 20, the frame member 40, the support member 130, the fixture 133, and the fixture 134. . Therefore, in the present embodiment, the same components as in the first embodiment will be assigned the same reference numerals and detailed explanations thereof will be omitted.

The frame member 40 supports the light collecting member 10. The frame member 40 is, for example, a frame-like member. The frame member 40 has a groove 46 in the inner surface 40 a. By inserting the outer peripheral edge portion 10A of the light collecting member 10 into the groove 46 of the frame member 40, the light collecting member 10 is supported by the frame member 40.

The support member 130 has a first support portion 131 and a second support portion 132. Since the first support portion 131 and the second support portion 132 are connected in a posture perpendicular to each other, the support member 130 exhibits an L shape in a cross section in the XZ plane. The support member 130 is fixed to the frame member 40 by the first support portion 131. The support member 130 supports the optical member 20 by the second support portion 132. The first support portion 131 and the second support portion 132 extend in the Y direction. In addition, in FIG. 3, the supporting member 130 has shown an example of the cross section. The support member 130 may not be disposed across the entire width of the optical member 20 in the Y direction, and may be disposed, for example, at a corner of the optical member 20.

The first support portion 131 and the frame member 40 are fixed by the fixing tool 133. The first support portion 131 is provided with a through hole 131H penetrating in the thickness direction. A hole 40H is provided in a portion overlapping the through hole 131H of the frame member 40. The fixture 133 is fixed to the hole 40H through the through hole 131H.

The second support portion 132 and the optical member 20 are fixed by the fixing tool 134. The outer peripheral edge portion 20A of the optical member 20 is provided with a through hole 20AH penetrating in the thickness direction. The second support portion 132 is provided with a hole 132H at a portion overlapping the through hole 20AH. The fixture 134 is fixed to the hole 132H through the through hole 20AH.

Unlike the case where the light collecting device 102 of the third embodiment is fixed to the light collecting member 10 with the adhesive layer 3 as in the first embodiment by including the support member 130, the optical member 20 can be easily made as needed. It is removable.

According to the lighting device 102 of the third embodiment, glare on the outside can be suppressed. Further, by providing the frame member 40 and the support member 130, the light collecting member 10 and the optical member 20 can be easily attached and detached independently.

Fourth Embodiment
FIG. 4 is a cross-sectional view showing the configuration of a daylighting apparatus according to a fourth embodiment. As shown in FIG. 4, the light collecting device 103 of the present embodiment includes a light collecting member 10, an optical member 20, and a frame member 140. Therefore, in the present embodiment, the same components as in the third embodiment will be assigned the same reference numerals and detailed explanations thereof will be omitted.

The frame member 140 supports the light collecting member 10 and the optical member 20. The frame member 140 is a frame-like member. The frame member 140 has a groove (first groove) 41 on the inner surface 140 a and a groove (second groove) 47 formed on the outdoor side of the groove 46. By inserting the outer peripheral edge portion 20A of the optical member 20 into the groove portion 47 of the frame member 40, the optical member 20 is supported by the frame member 40.

The optical member 20 is supported by the frame member 140 together with the light collecting member 10. Therefore, unlike the case of being fixed to the light collecting member 10 by the adhesive layer 3 as in the first embodiment, the light collecting device 103 of the fourth embodiment is provided with the frame member 140, thereby making the optical member 20 as necessary. It can be easily detached.

According to the daylighting device 103 of the fourth embodiment, glare on the outside can be suppressed. Further, by providing the frame member 140, the light collecting member 10 and the optical member 20 can be easily attached and detached independently. Furthermore, the number of parts can be reduced compared to the light collecting apparatus 102 of the third embodiment.

Fifth Embodiment
FIG. 5A is a cross-sectional view showing a configuration of a daylighting device of a fifth embodiment. FIG. 5B is a front view in a field of view from the X direction of FIG. 5A. As shown to FIG. 5A, the daylighting apparatus 104 of 5th Embodiment is provided with the daylighting member 10 and the optical member 120. As shown in FIG. Therefore, in the present embodiment, the same components as in the first embodiment will be assigned the same reference numerals and detailed explanations thereof will be omitted.

The optical member 120 is a member which can suppress the glare on the outdoor side like the optical member 20 of 1st Embodiment. The optical member 120 has a plurality of optical parts 121 and a light transmission part 122.

As shown in FIG. 5B, the plurality of optical parts 121 are provided in a stripe shape on one surface (the surface on the −X side) 1 a of the first substrate 1. Specifically, the plurality of optical units 121 extend in the direction (Y direction) intersecting the arrangement direction in the same plane with the arrangement direction (Z direction) of the plurality of light collecting units 42. The plurality of optical units 121 can transmit and diffuse the first light beam L1. The diffusion direction of the first light beam L1 is not particularly limited. The distance between the plurality of optical units 121 and the width in the Z direction of the light transmitting unit 122 are not particularly limited.

The light transmitting unit 122 is provided in an area other than the plurality of optical units 121. Air is present in the light transmission part 122.

As such an optical member 120, a member in which a plurality of through holes are formed in a stripe shape in a diffusion base or a diffusion film can be mentioned.

By providing the plurality of optical parts 121 in a stripe shape, it is possible to take in more sunlight into the room as compared to the case where the optical members are attached to the entire surface of the window frame. The traveling direction of the reflected light at the light collecting layer 4 does not coincide with the traveling direction of the incident light. By providing the plurality of optical parts 121 in a stripe shape, it is difficult to inhibit the light incident on the light collecting layer 4, and the light reflected by the light collecting layer 4 can be efficiently transmitted and diffused. As a result, the daylighting device 104 of the present embodiment can effectively suppress glare.

Here, with reference to FIGS. 6A and 6B, the positional relationship between the reflected light in the light collecting layer 4 and the plurality of optical units 121 will be described. FIG. 6A is a view of the state in which only sunlight collecting member 10 is irradiated with sunlight as viewed from the outdoor side. As shown to FIG. 6A, the light reflected by the light absorption layer 4 of the light collection member 10 is visually recognized by the person who exists outdoors as glare GL extended to the sequence direction (Z direction) of several light collection part 42. FIG. That is, the light reflected by the light collection layer 4 is visually recognized by the person who is outdoors as glare GL of a vertical line.

FIG. 6B is a view of the daylighting device 104 according to the fifth embodiment as it is viewed from the outdoor side. The optical member 120 according to the present embodiment includes a plurality of optical units 121 extending in a direction (Y direction) intersecting with the arrangement direction in the same plane as the arrangement direction (Z direction) of the plurality of light collecting units 42 . As a result, only a part of the light forming the glare GL can be transmitted through the light transmission part 122. As a result, while efficiently introducing sunlight, it is possible to reduce the area in which the person outside the room visually recognizes the glare GL of the vertical streak.

As shown in FIG. 5A, an adhesive layer 3 for fixing to the light collecting member 10 is provided on one surface (a surface facing the first substrate 1, a surface on the + X side) 120a of the optical member 120. There is. The type of the adhesive layer 3 is the same as that of the first embodiment.

In addition, as the optical member 120 of this embodiment, the member etc. which arrange | positioned and laminated the diffusion film in stripe form may be used for the base material which has light transmittance. In this case, the light transmitting portion 122 of the present embodiment is a base or a film having light transmittance.

Furthermore, in the present embodiment, the plurality of optical units 121 extend in the Y direction in FIGS. 5A and 5B, but the present invention is not limited thereto. The plurality of optical units 121 may extend in the oblique direction, that is, in the same plane (in the YZ plane) as the arrangement direction (Z direction) of the plurality of light collecting units 42 in the direction intersecting the arrangement direction.

According to the daylighting device 104 of the fifth embodiment, glare on the outside can be suppressed. In addition, by providing the plurality of optical units 121 in a stripe shape, it is possible to reduce the area where a person who is outdoors looks at the glare GL of the vertical streak while efficiently introducing sunlight.

Sixth Embodiment
FIG. 7 is a cross-sectional view showing a configuration of a daylighting apparatus of a sixth embodiment. As shown in FIG. 7, a daylighting device 105 according to the sixth embodiment includes a daylighting member 10, an optical member 20, and a holding member 50. Therefore, in the present embodiment, the same components as in the first embodiment will be assigned the same reference numerals and detailed explanations thereof will be omitted.

The holding member 50 holds the optical member 20 in a state in which the incident surface 20 a of the optical member 20 is inclined with respect to the incident surface 10 a of the light collecting member 10. The holding member 50 is attached along the lower side 20 B of the optical member 20.

The holding member 50 is provided with a rotating shaft 51. The pivot shaft 51 extends in a direction (Y direction) intersecting the arrangement direction in the same plane with the arrangement direction (Z direction) of the plurality of light collecting units 42. The lower end side of the optical member 20 is connected to the rotation shaft 51, and the optical member 20 is rotatable around the rotation shaft 51.

The inclination attitude of the optical member 20 around the rotation axis 51, that is, the inclination angle θ of the incident surface 20a of the optical member 20 with respect to the incident surface 10a of the light collecting member 10 changes continuously or stepwise depending on the season or the installation location. It is possible to The inclination angle θ is preferably 90 ° or less, and may be 0 °. That is, although the holding member 50 can hold the incident surface 20a of the optical member 20 in a tilted state with respect to the incident surface 10a of the light collecting member 10, the incident surface 20a of the optical member 20 is incident on the light collecting member 10 You may hold | maintain substantially parallel with respect to the surface 10a.

The installation place of the holding member 50 is not limited to the above. FIGS. 8A and 8B are diagrams showing modifications of the installation place of the holding member 50 of the sixth embodiment. FIGS. 8A and 8B show the case where the lighting device of the present embodiment is installed on a handrail such as a veranda. As shown in FIG. 8A, the holding member 50 may be attached along the side 20 C of the optical member 20. Further, as shown in FIGS. 8A and 8B, the holding member 50 may be curved with respect to the lower side 20B and the side side 20C of the optical member 20. Thereby, the leak of the light reflected by the daylighting layer 4 can be suppressed.

Further, the inclination angle θ of the incident surface 20 a of the optical member 20 with respect to the incident surface 10 a of the light collecting member 10 may be constant. That is, the optical member 20 may be fixed to the light collecting member 10 in a state in which the predetermined inclination angle θ of the optical member 20 is maintained.

According to the daylighting device 105 of the sixth embodiment, glare on the outside can be suppressed. Further, the holding member 50 holds the optical member 20 in a state in which the incident surface 20a of the optical member 20 is inclined with respect to the incident surface 10a of the light collecting member 10, compared to the case of attaching the entire inner surface of the window frame. It is easy to take in external light. As a result, the room can be brighter as compared to the case of being mounted on the entire surface. Furthermore, it is possible to suppress outdoor glare by changing continuously or stepwise according to the season or the installation place.

Seventh Embodiment
FIG. 9 is a cross-sectional view showing a configuration of a daylighting apparatus of a seventh embodiment. As shown in FIG. 9, a daylighting device 106 of the seventh embodiment includes the daylighting member 10, an optical member 220, and a holding member 150. Therefore, in the present embodiment, the same components as in the first embodiment will be assigned the same reference numerals and detailed explanations thereof will be omitted.

The optical member 220 is a member which can suppress the glare on the outdoor side like the optical member 20 of 1st Embodiment. The optical member 220 is composed of a plurality of louver members 221.
In the present specification, the plurality of louver members 221 correspond to “a plurality of members” in the claims.

The plurality of louver members 221 are provided in a stripe shape on one surface (the surface on the −X side) 1 a of the first substrate 1. Specifically, the plurality of louver members 221 extend in the direction (Y direction) intersecting the arrangement direction in the same plane with the arrangement direction (Z direction) of the plurality of light collecting units 42. The plurality of louver members 221 can transmit and diffuse the first light beam L1. The diffusion direction of the first light beam L1 is not particularly limited. The distance between the plurality of louver members 221 and the width in the Z direction of each optical unit are not particularly limited.

The holding member 150 holds the plurality of louver members 221 in a state where the incident surfaces 221 a of the plurality of louver members 221 are inclined with respect to the incident surface 10 a of the light collecting member 10. The holding member 150 is attached along the lower side of the plurality of louver members 221.

The holding member 150 includes a plurality of pivots 151. The pivot shaft 51 extends in a direction (Y direction) intersecting the arrangement direction in the same plane with the arrangement direction (Z direction) of the plurality of light collecting units 42. The lower end sides of the plurality of louver members 221 are connected to the plurality of pivot shafts 151, respectively, and are rotatable about the axes of the plurality of pivot shafts 151. The plurality of louver members 221 may be independently rotatable or may be interlocked and rotatable.

Inclination attitudes of the plurality of louver members 221 around each rotation axis 151, that is, the inclination angles θ _n (n is an integer of 1 or 2 or more) of the incident surfaces 221a of the plurality of louver members 221 with respect to the incident surface 10a of the light collecting member 10. Can be changed continuously or stepwise depending on the season and the installation location. The inclination angle θ _n is preferably 90 ° or less, and may be 0 °. Further, the inclination angles θ _n may be the same or different.

The inclination angles θ _n of the incident surfaces 221 a of the plurality of louver members 221 with respect to the incident surface 10 a of the light collecting member 10 may be constant. That is, the plurality of louver members 221 may be fixed to the light collecting member 10 in a state in which the predetermined inclination angles θ _n of the plurality of louver members 221 are maintained.

Further, in the present embodiment, although the plurality of louver members 221 extend in the Y direction in FIG. 9, the present invention is not limited to this. The plurality of louver members 221 may extend in an oblique direction, that is, in the same plane as the arrangement direction (Z direction) of the plurality of light collecting portions 42 in a direction intersecting the arrangement direction.

According to the daylighting device 106 of the seventh embodiment, glare on the outside can be suppressed. In addition, by providing the plurality of louver members 221 in the form of stripes, it is possible to reduce the area where a person who is outside can visually recognize the glare GL of the vertical streak while efficiently introducing sunlight. Further, the holding member 150 is attached to the entire inner surface of the window frame by holding the plurality of louver members 221 in a state where the incident surfaces 221a of the plurality of louver members 221 are inclined with respect to the incident surface 10a of the light collecting member 10 It is easier to take in outside light than in the case. Furthermore, it is possible to suppress outdoor glare by changing continuously or stepwise according to the season or the installation place.

Although the preferred embodiments according to the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is apparent that those skilled in the art can conceive of various modifications or alterations within the scope of the technical idea described in the claims, and the technical scope of the present invention is also natural for them. It is understood to belong to You may combine the structure of each embodiment suitably.

For example, as long as the effects of the present invention are not impaired, for example, the optical member 20 of the above-described embodiment performs the first light ray on the intensity of the second light ray L2 directed in the traveling direction of the first light ray L1 by the action of absorption, It may be reduced than the intensity of L1. The same applies to the optical member 120 and the optical member 220 of the above embodiment.

Also, for example, the arrangement place of the light collection layer 4 may be changed as appropriate. FIG. 10A is a cross-sectional view showing a modification of the daylighting apparatus according to the embodiment of the present invention. FIG. 10B is a cross-sectional view showing a modification of the daylighting apparatus according to the embodiment of the present invention. For example, as shown in FIG. 10A, in the light collecting device 101A, the light collecting layer 4 may be provided on the other surface (the surface facing the second substrate 2, the surface on the + X side) 1b of the first substrate 1 . In this case, the plurality of light collecting units 42 of the light collecting layer 4 are disposed to face the second substrate 2. Moreover, as shown to FIG. 10B, the daylighting layer 4 may be provided in the other surface (The surface by the side of an indoor, the surface by the side of + X) 2b of the 2nd board | substrate 2 at the light collection apparatus 101B.

In the above embodiment, the light forming the glare GL differs depending on the surrounding environment of the building to which the daylighting device of the above embodiment is applied. However, according to the above embodiment, the installation location of the daylighting device can be selected. 11A and 11B are diagrams showing installation places of the daylighting device when the daylighting device of the embodiment of the present invention is applied to a member on the outermost side, such as a handrail portion of a window or a veranda of a building. As shown to FIG. 11A, when building B2 exists in the incident side of building B1, it is good to provide the lighting apparatus of the said embodiment in all the windows W which building B1 has. On the other hand, as shown in FIG. 11B, when there is no other building on the incident side of the building B1, providing the lighting apparatus of the above embodiment in the window WL on the lower floor where at least the person H who is outside can visually recognize the glare GL. Good. Thereby, according to the surrounding environment of the building which applies the daylighting device of the above-mentioned embodiment, glare GL in the outdoors can be controlled, taking in sunlight efficiently as the whole building B1.

The light collecting member 10 of the above-described embodiment only needs to include the second substrate 2 and the light collecting layer 4, and may not include the first substrate 1. When the light collecting member 10 does not include the first substrate 1, the peripheral portion of the optical member 20 and the peripheral portion of the second substrate 2 may be bonded by the seal member 5.

In the daylighting apparatus according to the third and fourth embodiments, when the daylighting member 10 does not include the first substrate 1, the optical member 20 protects the daylighting layer 4 in addition to the effect of suppressing glare outside the room. Is considered to be obtained.

Claims

A daylighting member for introducing the incident external light into the room;
An optical member provided on the incident side of the light collecting member,
The light collecting member is
A substrate which is light transmissive and on which the outside light is incident;
And a light collecting layer provided on the substrate and having a plurality of light transmitting portions having light transmittance and a low refractive index portion provided between the plurality of light collecting portions,
In the optical member, the first light beam in which a part of the outside light is reflected by the light receiving member is incident, and the intensity of the second light beam emitted from the optical member and traveling in the traveling direction of the first light beam is A daylighting device that reduces the intensity of the first light beam.
The light collecting apparatus according to claim 1, wherein the optical member transmits and diffuses the first light beam.
The light collecting apparatus according to claim 1, wherein the low refractive index portion is air.
The light collecting device according to claim 1, wherein the light collecting device includes a support member that supports at least the optical member on the light collecting member.
The light collecting device according to claim 4, wherein the support member supports the optical member on at least a part of an outer peripheral edge of the light collecting member.
The light collecting apparatus according to claim 4, wherein the support member supports at least a part of an outer peripheral edge of the optical member.
The optical member has optical parts of a plurality of regions extending in a direction intersecting the arrangement direction of the plurality of light collecting parts, and light transmitting parts of the plurality of regions,
The light collecting device according to any one of claims 1 to 6, wherein the light transmitting portion is provided in a region other than the optical portion.
The light collecting device according to claim 1, wherein the light collecting device includes a holding member capable of holding the optical member in a state where the incident surface of the optical member is inclined with respect to the light incident surface of the light collecting member.
The holding member comprises a pivot shaft,
The light collecting apparatus according to claim 8, wherein the optical member is rotatably held by the rotation shaft.
The light collecting apparatus according to claim 1, wherein the optical member comprises a plurality of members extending in a direction intersecting the arrangement direction of the plurality of light collecting units.
The light collecting apparatus according to claim 1, wherein the optical member is removable.