JP2016069896A - Lighting tool, lighting system, and lighting window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting tool 3 that can offer a lighting effect in a horizontal direction.SOLUTION: A lighting tool 3 of the present invention includes a first main surface on which light is incident, a second main surface that faces the first main surface, a light controlling part 10 that deflects light incident from the first main surface toward the second main surface, and a light branching part 20 that branches the light emitted from the light controlling part 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a daylighting tool, a daylighting system, and a daylighting window used for taking outside light such as sunlight into a building or the like.

  It is well known that the window glass is used to form a bright and comfortable indoor space by taking in outside light such as sunlight inside the building. However, on the other hand, if the outside light incident on the window glass is taken into the room as it is, problems such as feeling dazzling or being limited to a part of the room where the light hits may occur. On the other hand, a technique has been proposed in which sunlight is directly controlled and light is taken indoors in a more comfortable manner.

For example, in Patent Document 1 (Japanese Patent Laid-Open No. 2012-255951), a concave groove extending in one direction is repeatedly produced, and incident light to the transparent sheet material is reflected by filling the concave groove with the filler. A light control member (lighting sheet) is disclosed in which a reflecting surface extending in one direction is formed on at least one slope of a concave groove, and direct sunlight transmitted through a window is introduced indoors by reflection by the reflecting surface.
JP 2012-255951 A

  In the indoor daylighting by the light control member (lighting sheet) as described above, the light is dispersed in one direction in which the light incident on the light control member is reflected, so that the light incident on the light control member is deflected. A sufficient effect can be obtained from the viewpoint of lighting in the direction, but there is a problem that it is impossible to obtain the lighting effect in the direction perpendicular to one direction for deflecting the incident light to the light control member. there were.

  Such a problem will be described with reference to the drawings, taking as an example a case in which a lighting effect in the vertical direction is obtained by the light control member and a lighting effect in the horizontal direction perpendicular to the vertical direction cannot be obtained.

  FIG. 11 is a view showing a conventional light control member having the light control unit 10 and shows a cross section of the room to which the light control member is applied. In the conventional light control member, the light that enters the room from the sun S in the window glass 50 is dispersed in the vertical direction by the light control unit 10, so that, for example, the ceiling part or the like is also subjected to dispersed light. Thus, since the conventional light control member disperses sunlight in the vertical direction, there is an effect in this respect.

  On the other hand, FIG. 12 is a diagram illustrating a problem of a conventional light control member having the light control unit 10. FIG. 12 shows a plan view of the room to which the light control member is applied. In the conventional light control member, as shown in FIG. 12, it can be seen that in the horizontal direction, a bright area and a dark area where the dispersed light is not irradiated are formed.

In the above example, it has been explained that there is a problem that the light control member disperses light only in the vertical direction and not in the horizontal direction, but the problem is further generalized. In this case, a bright area can be obtained in the dispersion direction in which the light control member disperses the light, but a bright area cannot be obtained in the direction perpendicular to the dispersion direction. However, in the following description, since it becomes complicated to examine in directions other than the vertical direction and the horizontal direction, the description is limited to the vertical direction and the horizontal direction. However, it should be added that the problem and solution of the present invention are not limited to the vertical direction and the horizontal direction.

  The present invention is for solving the above-described problems, and a lighting tool according to the present invention includes a first main surface on which light is incident and a second main surface on which light is emitted facing the first main surface. A light control unit that deflects light incident from the first main surface toward the second main surface, and a light branching unit that branches the light emitted from the light control unit. It is characterized by that.

  The lighting tool according to the present invention includes a light branching unit that branches incident light, a first main surface on which light branched by the light branching unit is incident, and a light that is opposed to the first main surface and is emitted. And a light control unit that deflects light incident from the first main surface toward the second main surface.

  The lighting tool according to the present invention is characterized in that the light branching section has a light branching layer disposed in a transparent substrate.

  The daylighting system according to the present invention has a first main surface on which light is incident and a second main surface on which the light is emitted while facing the first main surface, and the light incident from the first main surface. A light control member that is a structure having a light control part that deflects the light toward the second main surface, and a light branching member that is a structure having a light branching part that branches light emitted from the light control part, It is characterized by comprising.

  The daylighting system according to the present invention includes a light branching member that is a structure having a light branching part that branches incident light, a first main surface on which light branched by the light branching part is incident, and the first And a second main surface that faces one main surface and emits light, and is a structure having a light control unit that deflects light incident from the first main surface toward the second main surface. And a member.

  Moreover, the lighting system which concerns on this invention has two or more said light branch members, It can rotate so that the said light branch layer surface of all the said light branch members may face the same direction, It is characterized by the above-mentioned.

  The daylighting system according to the present invention is characterized in that the light branching member rotates about a virtual axis in a direction in which the light control member deflects.

  The daylighting system according to the present invention is characterized in that the light branching member has a longitudinal direction in a direction in which the light control member deflects.

  Moreover, the lighting window which concerns on this invention has distribute | arranged the lighting tool in any one of the above, and the lighting system in any one of the above to the window part, It is characterized by the above-mentioned.

  The lighting tool according to the present invention has a light branching unit that branches the light emitted from the light control unit. According to the lighting tool according to the present invention, the light branching unit is a deflection of the light control unit. Since the light is branched in a direction perpendicular to the direction in which light is emitted, it is possible to obtain a daylighting effect in a direction perpendicular to the direction in which the light control unit deflects.

  The daylighting system according to the present invention includes a light branching member that branches light emitted from the light control member. According to such a daylighting system according to the present invention, the light branching member deflects the light control member. Since light is branched in a direction perpendicular to the direction in which the light is controlled, it is possible to obtain a daylighting effect in a direction perpendicular to the direction in which the light control member deflects.

It is a figure explaining the effect of the light control part. 2 is a diagram schematically illustrating a cross-sectional structure of a light control unit 10. FIG. It is a figure which illustrates the cross-sectional structure of the optical branching part 20 typically. It is a figure explaining the structure of the lighting tool 3 which concerns on embodiment of this invention. It is a figure explaining the effect of the lighting system 3 which concerns on embodiment of this invention. It is a figure explaining the structure of the lighting system 5 which concerns on embodiment of this invention. It is the perspective view which looked at the lighting system 3 which concerns on embodiment of this invention from the room inner side. It is a figure explaining the structure of the optical branching member 20 used with the lighting system 3 which concerns on embodiment of this invention, and its effect. It is a figure explaining the effect of the lighting system 5 which concerns on embodiment of this invention. It is a figure explaining the structure of the lighting system 5 which concerns on other embodiment of this invention. It is a figure which shows the conventional lighting tool using the light control member. It is a figure explaining the subject of the conventional lighting tool using the light control member.

[1] Daylighting tool Hereinafter, embodiments of a daylighting tool according to the present invention will be described with reference to the drawings. Hereinafter, first, an outline of the configuration of the light control unit 10 used in the present invention will be described.

  FIG. 1 is a diagram for explaining the effect of the light control unit 10. FIG. 1 (A) shows the intake of sunlight from a normal window part, and FIG. 1 (B) shows the case where the light control part 10 is attached to the window part and the sunlight is introduced. . By providing the light control unit 10 in the window, daylighting that brightens the entire interior as uniformly as possible is realized.

  Here, in the following description, coordinates for clarifying the direction and positional relationship of each component are defined. A right-handed system coordinate is defined in which the direction parallel to the horizontal side and direction of the window portion is the x direction and the vertically upward direction is the z direction, and is used for the following description. In the drawings attached to the present specification, such right-handed system coordinates are described for reference as necessary.

  An example of the light control unit 10 used in the present invention will be described. FIG. 2 is a diagram schematically illustrating a cross-sectional structure of the light control unit 10. 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. In addition, from the viewpoint of easy viewing of the drawings, reference numerals are omitted for configurations that repeat periodically.

  As shown in FIG. 2, the light control unit 10 includes a first main surface 11 on which light is incident, and a second main surface 12 that faces the first main surface 11 and emits light, and the first main surface 11 emits light. A plurality of low-refractive index medium portions 16 that exist between the main surface 11 and the second main surface 12 and deflect light incident from the first main surface 11 toward the second main surface 12; Prepare.

  The light control unit 10 typically includes a plurality of low refractive index medium units 16 extending in the vertical direction (x direction) in the drawing and periodically provided in the vertical direction (z direction) in the drawing, and a low refractive index medium. And a high refractive index medium part 15 that separates the parts 16 from each other. In this case, the interface between the low refractive index medium portion 16 and the high refractive index medium portion 15 is a reflective surface. The low refractive index medium section 16 is configured by a medium having a refractive index lower than that of the high refractive index medium section 15. For example, when the high refractive index medium portion 15 is a resin, the low refractive index medium portion 16 can be made of air or a resin having a lower refractive index than the resin constituting the high refractive index medium portion 15.

The light L1 incident on the first main surface 11 travels into the light control unit 10 and is reflected and deflected by the reflecting surface. Thereafter, the deflected light L1 is emitted from the second main surface 12 facing the first main surface 11, and proceeds to the outside of the light control unit 10.

  In addition, like the light L2 incident on the first main surface 11, the light proceeds into the light control unit 10 and is deflected by being refracted at the interface between the low refractive index medium unit 16 and the high refractive index medium unit 15, and the second There is also light that exits from the main surface 12 and travels out of the light control unit 10.

  Examples of the constituent material of the light control unit 10 having the above functions include organic polymer resin materials such as thermosetting resins and ionizing radiation curable resins, and inorganic glass materials.

  Moreover, although the example of the structure which distribute | arranges the some low refractive index medium part 16 in the high refractive index medium part 15 as the light control part 10 was demonstrated, it replaced with the some low refractive index medium part 16, for example, A plurality of highly reflective materials such as metal may be arranged in the light control unit 10.

  Next, an outline of the configuration of the optical branching unit 20 used in the present invention will be described. FIG. 3 is a diagram schematically illustrating a cross-sectional structure of the light branching unit 20. It should be noted that the cross-sectional structure in FIG. 3 is a horizontal cross-sectional view taken along the xy plane, and is different from the cross-sectional view taken along the yz-plane surface in FIG.

  The light branching unit 20 can be constituted by, for example, a light branching layer 22 having a function of branching incident light in a plurality of directions and two transparent resin materials 25 sandwiching the light branching layer 22. The light branching layer 22 can be composed of a dielectric multilayer film, a metal thin film, or the like. Moreover, the transparent resin material 25 can also be comprised using transparent organic resin materials, such as an acryl, and can also be comprised using inorganic materials, such as glass.

  In addition, as the light branching unit 20, an example of a configuration including a light branching layer having a function of branching incident light in a plurality of directions and two transparent resin materials sandwiching the light branching layer has been described. As described above, the plurality of low refractive index medium portions 16 extending in the vertical direction (Z direction) and periodically provided in the vertical direction (x direction) on the paper surface are separated from the low refractive index medium portions 16. It is good also as a structure provided with the medium part 15. FIG.

  The light branching portion 20 as described above can branch light incident on the light branching portion 20. Light from the sun S is dispersed by the light control unit 10 in a direction (vertical direction) in which the light control unit 10 deflects the light, and such dispersed light is further dispersed by the light branching unit 20 in the light control unit 10. Is branched in a direction (horizontal direction) perpendicular to the direction of deflection.

  Next, the lighting tool according to the present invention including the light control unit 10 and the light branching unit 20 as described above will be described. FIG. 4 is a diagram illustrating the configuration of the daylighting tool 3 according to the embodiment of the present invention.

  As an embodiment of the lighting tool 3, a film (sheet) shape may be sufficient, and a panel, a blind, a roll-up screen, glass, and a laminated glass form may be sufficient.

  FIG. 4A shows a film (sheet) -shaped daylighting tool 3 formed by bonding the light control unit 10 and the light branching unit 20 together. The lighting tool 3 to some extent may be a panel member formed by bonding the light control unit 10 and the light branching unit 20 together.

  FIG. 4B shows a case where a blind composed of a plurality of slats formed by bonding the light control unit 10 and the light branching unit 20 is used as the lighting tool 3.

  FIG. 4C shows a case where a roll-up blind made of a blind member formed by bonding the light control unit 10 and the light branching unit 20 is used as the lighting tool 3.

  FIG. 4D shows a lighting tool 3 in which a light control glass (light control part) 26 and a light branching glass (light branching part) 28 are bonded together through a joint part 27 such as an adhesive. The case where it uses as is shown.

  In the lighting tool 3 according to the present invention, the light from the sun S may be dispersed light by the light control member 10, and the dispersed light may be branched by the light branching unit 20, and vice versa. The light may be split by the light branching unit 20 and the branched light may be dispersed by the light control unit 10. In the following embodiments, the former will be described as an example.

  FIG. 5 is a diagram for explaining the effect of the daylighting tool according to the embodiment of the present invention. The light that has entered the light control unit 10 from the sun S is dispersed and emitted by the light control unit 10 in the direction in which the light control unit 10 deflects the light (vertical direction in FIG. 5). Next, the light emitted to the light control unit 10 enters the light branching unit 20, is branched by the light branching layer, and mainly intersects the direction perpendicular to the direction of deflection of the light control unit 10 (in FIG. 5, a horizontal plane). Are divided into two directions) and emitted from the light branching unit 2020. Thereby, the dark area which has been formed with the conventional light control member will be reduced.

As mentioned above, the lighting tool which concerns on this invention has the light branching part 2020 which branches the light radiate | emitted from the light control part 10, According to such a lighting tool which concerns on this invention, the light branching part 20 is Since the light is branched in a direction perpendicular to the deflecting direction of the light control unit 10, it is possible to obtain a daylighting effect in a direction perpendicular to the deflecting direction of the light control unit 10.
[2] Daylighting System Next, an embodiment of the daylighting system 5 according to the present invention will be described with reference to the drawings.

The daylighting system 5 according to the present invention is configured by a combination of a structure having the function of the light control unit 10 (light control member 10 ′) and a structure having the function of the light branching unit 20 (light branching member 30). Is done.

  In the daylighting system according to the present invention, the light from the sun S may be dispersed light by the light control member 10 ′, and this dispersed light may be branched by the light branching member 30, and vice versa. The light from S may be branched light by the light branching member 30 and the branched light may be dispersed by the light control member 10. In the following embodiments, the former will be described as an example.

The light control member 10 ′ is a structure having the light control unit 10 described in the lighting tool 3. As an embodiment of the light control member 10 ′, a conventional film shape (lighting sheet) may be used, or a panel, a blind, a roll-up screen, glass, or laminated glass may be used.

The light branching member 30 is a structure having the light branching portion 20 described in the lighting tool 3. As an embodiment of the light branching member 20, it may be a film shape (sheet) like the light control member 10 ′, or may be a panel, a blind, a roll-up screen, glass, or laminated glass. .

  The lighting system according to the embodiment of the present invention has a configuration in which the light control member 10 ′ is attached to the window glass 50 in the same manner as in the related art. The light to be dispersed is dispersed in one direction (vertical direction in FIG. 6) in which the light control member 10 ′ deflects the light.

There are a plurality of light branching members 30 that branch the dispersed light emitted from the light control member 10 ′ in a direction (horizontal direction in FIG. 6) perpendicular to the direction in which the light control member 10 ′ deflects. As shown in FIG. 7, the light branching member 30 has a longitudinal direction in the direction in which the light control member 10 deflects light (vertical direction in FIG. 6). As shown in the figure, a plurality of pieces are suspended in the x direction. Further, by the rotation mechanism (not shown), the light branching member 30 is configured to rotate around the virtual axis 40 in the direction in which the light control member 10 deflects light (vertical direction in FIG. 6).

  FIG. 8 is a view for explaining the configuration and effects of the light branching member 30 used in the lighting tool 3 according to the embodiment of the present invention. FIG. 8 is a diagram in which a part of the plurality of light branching members 30 arranged are cut along an xy section.

  The light branching member 30 can be composed of, for example, a light branching layer 32 having a half mirror function and two transparent base materials 35 sandwiching the light branching layer 32. The light branch layer 32 can be composed of a dielectric multilayer film, a metal thin film, or the like. Moreover, the transparent base material 35 can also be comprised using transparent organic resin materials, such as an acryl, and can also be comprised using inorganic materials, such as glass.

The light branching member 30 as described above makes it possible to branch the light L ₀ incident on the light branching member 30 into L ₃ and L ₄ . The light from the sun S is dispersed in the light control member 10 ′ in the direction (vertical direction) in which the light control member 10 deflects the light. Such dispersed light is further dispersed by the light branching member 30 in FIG. As shown, the light control member 10 branches in a direction (horizontal direction) perpendicular to the direction in which the light control member 10 deflects.

  The plurality of light branching members 30 constituting the daylighting system 5 are rotated by a rotation mechanism (not shown) so that the main surfaces of the light branching layers 32 of all the light branching members 30 face the same direction. It is configured to be possible. Thereby, it is possible to adjust the direction in which the branched light emitted by the light branching member 30 is emitted, and it is possible to realize daylighting according to the position of the sun S and the preference of the resident.

  FIG. 9 is a diagram for explaining the effect of the daylighting system 5 according to the embodiment of the present invention. Light incident on the light control member 10 ′ from the sun S is dispersed and emitted by the light control member 10 ′ in the direction in which the light control member 10 ′ deflects light (vertical direction in FIG. 9). Next, the light emitted to the light control member 10 enters a plurality of light branching members 30, is branched by the light branching layer 32, and intersects the direction perpendicular to the direction in which the light control member 10 ′ mainly deflects ( In FIG. 9, the light is divided into two directions in a horizontal plane and emitted from the light branching member 30. Thereby, the dark area which has been formed by the conventional daylighting system is reduced.

  As described above, the daylighting system 5 according to the present invention has the light branching member 30 that branches the light emitted from the light control member 10 ′, and according to such a daylighting tool 3 and the daylighting system 5 according to the present invention. For example, since the light branching member 30 branches light in a direction perpendicular to the direction of deflection of the light control member 10 ′, it is possible to obtain a lighting effect in a direction perpendicular to the direction of deflection of the light control member 10. It becomes possible.

  Next, another embodiment of the present invention will be described. FIG. 10 is a diagram illustrating the configuration of a daylighting system 5 according to another embodiment of the present invention. In the previous embodiment shown in FIG. 6, as the light branching member 30, a vertical type relatively special member extending in the vertical direction was used, but in this embodiment, the light branching member 30. As such, a relatively general roll-up blind 37 is used. Even with such a simple configuration, the same effects as those of the previous embodiment can be obtained.

  As described above, the lighting tool according to the present invention has the light branching unit that branches the light emitted from the light control unit. According to the lighting tool according to the present invention, the light branching unit is the light control unit. Since light is branched in a direction perpendicular to the deflection direction of the light, it is possible to obtain a lighting effect in a direction perpendicular to the deflection direction of the light control unit.

  The daylighting system according to the present invention includes a light branching member that branches light emitted from the light control member. According to such a daylighting system according to the present invention, the light branching member deflects the light control member. Since light is branched in a direction perpendicular to the direction in which the light is controlled, it is possible to obtain a daylighting effect in a direction perpendicular to the direction in which the light control member deflects.

DESCRIPTION OF SYMBOLS 3 ... Daylighting tool 5 ... Daylighting system 10 ... Light control part 10 '... Light control member 11 ... 1st main surface 12 ... 2nd main surface 15 ... High refractive index Medium part 16 ... low refractive index medium part 20 ... light branching part 22 ... light branching layer 25 ... transparent resin material 26 ... light control glass (light control part)
27 ... Junction 28 ... Light branching glass (light branching part)
30 ... Light branching member 32 ... Light branching layer 35 ... Transparent substrate 37 ... Roll-up blind (light branching member)
40 ... Virtual axis 50 ... Window glass

Claims (9)

A first main surface on which light is incident and a second main surface opposite to the first main surface from which light is emitted, and deflects light incident from the first main surface toward the second main surface A lighting control device, and a light branching unit for branching the light emitted from the light control unit. A light branching portion that branches incident light, a first main surface on which light branched by the light branching portion is incident, and a second main surface that faces the first main surface and emits light, A light control unit that deflects light incident from the first main surface toward the second main surface; The said light branch part has a light branch layer distribute | arranged in the transparent base material, The lighting tool of Claim 1 or Claim 2 characterized by the above-mentioned. A first main surface on which light is incident and a second main surface opposite to the first main surface from which light is emitted, and deflects light incident from the first main surface toward the second main surface A light control member which is a structure having a light control unit
A daylighting system comprising: a light branching member which is a structure having a light branching part for branching the light emitted from the light control part. A light branching member that is a structure having a light branching part that branches incident light;
A first main surface on which the light branched by the light branching unit is incident; and a second main surface opposite to the first main surface and emitting light, and the light incident from the first main surface is A daylighting system comprising: a light control member that is a structure having a light control unit that deflects toward the second main surface. 6. The daylighting system according to claim 4 or 5, wherein a plurality of the light branching members are provided, and the light branching layer surfaces of all the light branching members are rotatable so as to face the same direction. The daylighting system according to any one of claims 4 to 6, wherein the light branching member rotates about a virtual axis in a direction in which the light control member deflects. The daylighting system according to any one of claims 4 to 7, wherein the light branching member has a longitudinal direction in a direction in which the light control member deflects. A daylighting window, wherein the lighting tool according to any one of claims 1 to 3 and the daylighting system according to any one of claims 4 to 8 are arranged in a window portion.

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