JP2020156432A - Light control system and illumination system - Google Patents

Abstract

To provide a light control system and an illumination system which can easily improve a degree of freedom of illumination design.SOLUTION: A light control system 1 irradiates a plant P1 arranged in an indoor space A1 with light. The light control system 1 is equipped with one or more reflection members 3. The one or more reflection members 3 are arranged above both an illumination device 2 and the plant P1, and reflect light from the illumination device 2 toward the plant P1 as reflected light L2. The light control system 1 performs light control of changing at least one of light distribution, light flux and spectrum to the reflected light L2, and irradiates the plant P1 with the light-controlled reflected light L2.SELECTED DRAWING: Figure 1

Description

The present disclosure relates generally to light control systems and lighting systems, and more specifically to light control systems and lighting systems for irradiating plants arranged in indoor spaces with light.

Patent Document 1 describes a lighting device in which a light emitter module capable of irradiating a plant with light is arranged on a substrate. This lighting device (growth device) is used in a vinyl house, and is arranged in the required number above the plants (cultivated plants). The lighting device is supported by a support mechanism so as to be suspended above the plant from the ceiling (roof).

The light emitter module includes a first LED light emitting element that emits light in the first wavelength region and a second LED light emitting element that emits light in the second wavelength region. The light emitter module irradiates the plant with the light generated by the first LED light emitting element at a certain timing, irradiates the plant with the light emitted by the second LED light emitting element, or emits light from the first LED. The plant is irradiated with the light generated by the element and the second LED light emitting element.

Japanese Unexamined Patent Publication No. 2009-125007

The lighting device described in Patent Document 1 is a dedicated device designed for growing plants, and since such a dedicated lighting device must be installed above the plant, the degree of freedom in lighting design is high. It is difficult to improve.

The present disclosure has been made in view of the above reasons, and an object of the present disclosure is to provide an optical control system and a lighting system that can easily improve the degree of freedom in lighting design.

The optical control system according to one aspect of the present disclosure is a system for irradiating plants arranged in an indoor space with light. The optical control system includes one or more reflective members. The one or more reflecting members are arranged above both the lighting device and the plant, and reflect the light from the lighting device toward the plant as reflected light. The light control system performs light control that changes at least one of a light distribution, a luminous flux, and a spectrum with respect to the reflected light, and irradiates the plant with the light-controlled reflected light.

The lighting system according to one aspect of the present disclosure includes the light control system and the lighting device.

According to the present disclosure, there is an advantage that the degree of freedom in lighting design can be easily improved.

FIG. 1A is a schematic view showing how the light control system according to the first embodiment irradiates a plant with light in a normal mode. FIG. 1B is a schematic view showing how the light control system of the above irradiates a plant with light in a wide-angle mode. FIG. 1C is a schematic view showing how the light control system of the above irradiates a plant with light in a dimming mode. FIG. 2 is a conceptual diagram showing a usage example of the same optical control system. FIG. 3 is a system configuration diagram schematically showing the configuration of the lighting system according to the first embodiment by dividing it into blocks for each function. FIG. 4 is a schematic perspective view showing the appearance of the same optical control system. FIG. 5A is a schematic perspective view of the same optical control system as viewed from diagonally above with the cover removed. FIG. 5B is a schematic perspective view showing the configuration of each structure included in the reflective member of the same optical control system. 6A to 6D are schematic views schematically showing the function of each reflecting surface of each structure included in the reflecting member of the same optical control system. FIG. 7 is a graph showing the characteristics of output light in consideration of human luminosity factor for the lighting system of the same lighting system. FIG. 8 is a schematic view showing how the optical control system according to the second embodiment irradiates a plant with light in a wide-angle mode.

(Embodiment 1)
(1) Outline An outline of the optical control system 1 according to the present embodiment will be described with reference to FIGS. 1A to 2.

The light control system 1 is a system for irradiating the plant P1 arranged in the indoor space A1 with light. In recent years, "indoor greening" in which a plant P1 such as a foliage plant is incorporated into an indoor space A1 of an office or the like has attracted attention. By indoor greening (indoor greening), a person can live with the plant P1 even though it is an indoor space A1, and it is possible to obtain effects such as comfort and healing. In such indoor greening, a means for irradiating the plant P1 with light is important.

That is, in the indoor space A1, the amount of light irradiating the plant P1 is likely to be insufficient as compared with the outdoors where the sunlight directly irradiates, and it is difficult to secure the amount of light required for growing the plant P1. .. If the amount of light required for growing the plant P1 cannot be secured, photosynthesis in the plant P1 will be insufficient, leading to poor growth of the plant P1, so the means for irradiating the plant P1 with light is important. The light control system 1 contributes to securing the amount of light required for growing the plant P1 by irradiating the plant P1 arranged in the indoor space A1 with light, and as a result, also promotes the spread of indoor greening. Contribute.

The light control system 1 according to the present embodiment is a system for irradiating a plant P1 arranged in the indoor space A1 with light, and includes one or more reflective members 3. One or more reflective members 3 are arranged above both the lighting device 2 and the plant P1. The one or more reflecting members 3 reflect the light (output light L1) from the lighting device 2 toward the plant P1 as reflected light L2. The light control system 1 performs light control for changing at least one of the light distribution, the luminous flux, and the spectrum with respect to the reflected light L2, and irradiates the plant P1 with the light-controlled reflected light L2.

According to the above-described configuration, the reflected light L2 reflected by one or more reflecting members 3 located above both the lighting device 2 and the plant P1 irradiates the plant P1, so that the lighting device 2 itself is the plant P1. It is possible to irradiate the plant P1 with light from above even if it is not above. Moreover, since the reflected light L2 that has been appropriately light-controlled by the light control system 1 is applied to the plant P1, the lighting device 2 itself does not have to be a dedicated device designed for growing the plant P1. The plant P1 can be irradiated with light suitable for growing the plant P1. In short, according to the light control system 1, the degree of freedom regarding the arrangement and specifications of the lighting device 2 can be increased as compared with the case where the light from the lighting device 2 is directly irradiated to the plant P1. It becomes easier to improve the degree of freedom in design.

(2) Details Hereinafter, details of the optical control system 1 and the lighting system 10 according to the present embodiment will be described with reference to FIGS. 1 to 7.

(2.1) Premise The "indoor space" in this disclosure means the space inside a building, and as an example, a non-residential facility such as an office, store, school, factory, welfare facility, hospital or plant cultivation facility. Includes internal space and internal space (living space) of housing facilities such as detached houses or apartments. In particular, the indoor space A1 is preferably a space in which the person H1 exists, and is an environment in which the person H1 and the plant P1 are in the person area (A12). In this embodiment, as an example, a case where the indoor space A1 is (the internal space of) an office will be described.

The "plant" referred to in the present disclosure is a plant in a broad sense which is a group opposite to an animal when the biological group is roughly divided into two, and generally, the cell has a cell wall, and most of them are photosynthetic. It is an organism that produces energy on its own and has no motor function. The plant P1 also includes pots with flowers, herbs without flowers, foliage plants, moss plants (moss), vegetables, fruits and the like. In the present embodiment, as an example, a case where the plant P1 is a foliage plant such as pachira, areca palm, rubber gum, or ivy will be described. In the present embodiment, it is assumed that the plants P1 are dispersedly arranged in a plurality of locations in one indoor space A1. The plant P1 arranged at one place may contain a plurality of types of plants.

"Upper" in the present disclosure simply means upper, and is not limited to directly above (directly above). For example, when "A is above B", "A" is used. Should be at a higher position than "B", that is, at a position where the distance from the reference surface such as the ground or the floor surface is large. That is, in the optical control system 1 according to the present embodiment, since one or more reflective members 3 are arranged above both the lighting device 2 and the plant P1, one or more reflective members 3 are the lighting device 2. It is in a higher position than any of the plant P1 and the plant P1.

"Light control" as used in the present disclosure means control that changes at least one of light distribution, luminous flux, and spectrum. That is, the optical control system 1 changes at least one of the light distribution, the luminous flux, and the spectrum of the reflected light L2 by performing light control on the reflected light L2. In light control, for example, only one of light distribution, luminous flux and spectrum may be changed, or two of light distribution, luminous flux and spectrum (light distribution and luminous flux, luminous flux and spectrum, or light distribution). And the spectrum), or the light distribution, the luminous flux, and the entire spectrum may be changed.

The "light distribution" referred to in the present disclosure means the luminosity distribution of the light source with respect to the space, that is, the spatial distribution of the light emitted from the light source. Therefore, when the light distribution of the reflected light L2 changes, the spatial distribution of the light irradiating the plant P1 changes. For example, the wider the light distribution, the wider the range of light irradiation on the plant P1.

The "luminous flux" referred to in the present disclosure is a physical quantity representing the amount (brightness) of light passing through a certain surface in a unit time, and the unit is "lm". Therefore, when the luminous flux of the reflected light L2 changes, the amount of light irradiating the plant P1 changes. For example, in "dimming" in which the total amount of energy of light reaching the plant P1 is reduced due to absorption or diffusion (scattering) of light, the luminous flux is reduced.

The "spectrum" as used in the present disclosure means the intensity distribution of each wavelength component in light, that is, the optical spectrum. Therefore, when the spectrum of the reflected light L2 changes, the color (dominant wavelength) or peak wavelength of the light irradiating the plant P1 changes. For example, the spectrum of light reaching the plant P1 changes due to absorption or diffusion (scattering) of a specific wavelength component.

(2.2) Overall Configuration Next, the configurations of the optical control system 1 and the lighting system 10 according to the present embodiment will be described with reference to FIGS. 1A to 3.

The optical control system 1 according to the present embodiment constitutes the lighting system 10 together with the lighting device 2. In other words, the lighting system 10 according to the present embodiment includes an optical control system 1 and a lighting device 2. That is, the lighting device 2 is not included in the components of the lighting system 10.

The lighting system 10 constitutes a system for irradiating the plant P1 arranged in the indoor space A1 with light, unlike a general lighting system for ensuring the illuminance of the indoor space A1. The lighting system 10 may include at least one light control system 1 and one lighting device 2. In the present embodiment, it is assumed that the lighting system 10 includes one light control system 1 and one lighting device 2.

In the present embodiment, as described above, the plants P1 are dispersedly arranged in a plurality of locations in one indoor space A1. In the example of FIG. 2, plants P1 are arranged at two locations in the indoor space A1. One lighting system 10 is installed for each plant P1 arranged at each location. Therefore, in the example of FIG. 2, the lighting systems 10 are installed at two places in the indoor space A1 as in the plant P1.

Here, the lighting device 2 is installed on the floor 101 of the indoor space A1. The lighting device 2 is arranged around the plant P1. Further, in the present embodiment, the plant P1 is arranged on furniture such as a desk or a storage shelf installed on the floor 101. In other words, the plant P1 and the lighting device 2 are installed on the floor 101 so as to be adjacent to each other. The lighting device 2 is stationary on the floor 101 in an independent state. Here, the lighting device 2 is only placed on the floor 101 and is not particularly fixed to the floor 101.

The lighting device 2 is electrically connected to a power source by, for example, an outlet or underfloor wiring. In the present embodiment, as an example, the lighting device 2 is electrically connected to the system power supply via a distribution board or the like. As a result, the lighting device 2 operates by receiving an AC 100V power supply from the system power supply.

On the other hand, the optical control system 1 is installed on the ceiling 102 of the indoor space A1. The light control system 1 is located above the plant P1. More specifically, the light control system 1 is arranged not directly above (directly above) the plant P1 but directly above (directly above) the area between the plant P1 and the lighting device 2 on the floor 101. The optical control system 1 is attached to the ceiling 102 with its entire surface exposed. Here, the optical control system 1 is fixed to the ceiling 102 by an appropriate means such as screwing, gluing, or a magnet.

Here, the optical control system 1 includes one or more reflective members 3 as described above. Since the optical control system 1 including the reflective member 3 is installed on the ceiling 102 in this way, at least one of the one or more reflective members 3 is installed on the ceiling 102. In this embodiment, the optical control system 1 includes only one reflective member 3. Therefore, all the reflective members 3 are installed on the ceiling 102.

Due to the arrangement of the light control system 1 and the lighting device 2 as described above, the reflective member 3 of the light control system 1 installed on the ceiling 102 is above any of the lighting device 2 and the plant P1 installed on the floor 101. Will be placed in. Then, in the lighting system 10, the light (output light L1) from the lighting device 2 can be reflected as reflected light L2 toward the plant P1 by the reflecting member 3 of the light control system 1. That is, the lighting device 2 installed on the floor 101 is installed with the light emitting direction facing upward so as to output the output light L1 toward the optical control system 1 installed on the ceiling 102. The light control system 1 irradiates the plant P1 installed on the floor 101 with the reflected light L2 from above by reflecting the light (output light L1) from the lighting device 2 downward by the reflecting member 3. ..

Further, in the present embodiment, the optical control system 1 does not require electric power (electrical energy) for its operation. Therefore, no particular power is supplied to the optical control system 1.

FIG. 3 is a system configuration diagram schematically showing the configuration of the lighting system 10 according to the present embodiment by dividing it into blocks for each function. As shown in FIG. 3, the indoor space A1 includes a plant area A11 in which the plant P1 is arranged and a person area A12 in which the person H1 exists separately from the plant area A11. As will be described in detail later, the light control system 1 performs light control only on the reflected light L2 that irradiates the plant area A11 out of the plant area A11 and the human area A12.

As shown in FIG. 3, the lighting device 2 includes a light source unit 21, a lighting circuit 22, and a detection unit 23.

The light source unit 21 emits light when electric power is supplied from the lighting circuit 22. The light source unit 21 has a first light emitting element 211 and a second light emitting element 212. The first light emitting element 211 and the second light emitting element 212 are light emitting elements having different emission colors (peak wavelengths) from each other. The light source unit 21 has a plurality of such first light emitting elements 211 and second light emitting elements 212, respectively. When both the first light emitting element 211 and the second light emitting element 212 emit light, the light from the first light emitting element 211 and the light from the second light emitting element 212 are mixed (combined) from the lighting device 2. Therefore, it is output as the output light L1. In the present embodiment, as an example, the first light emitting element 211 and the second light emitting element 212 both include a light emitting diode (LED: Light Emitting Diode).

The first light emitting element 211 is a light emitting element that outputs white light. The first light emitting element 211 may be, for example, a combination of a blue light emitting diode and a yellow phosphor, a combination of a blue light emitting diode and a green and red phosphor, or a combination of an ultraviolet light emitting diode and a blue, green and red phosphor. It will be realized. That is, according to these combinations, the light that the human H1 can perceive as white is realized by the color mixing of the light from the light emitting diode and the light wavelength-converted by the phosphor.

The second light emitting element 212 is a light emitting element that outputs red light. The second light emitting element 212 is, for example, a red light emitting diode whose emission peak wavelength is in the range of 600 nm or more and 700 nm or less. As an example in the present embodiment, the second light emitting element 212 has a peak wavelength in the vicinity of 660 nm. As a result, the component of red light (peak wavelength is 660 nm) absorbed by phytochrome (red light absorption type), which is a photoreceptor (chromoprotein) that greatly affects the flower bud formation of plant P1, is output from the second light emitting element 212. can do.

The lighting circuit 22 drives the light source unit 21 to cause the light source unit 21 to emit light. Since the light source unit 21 has the first light emitting element 211 and the second light emitting element 212 as described above, the lighting circuit 22 causes both the first light emitting element 211 and the second light emitting element 212 to emit light.

In the present embodiment, the lighting circuit 22 has a dimming function. That is, the lighting circuit 22 can change the dimming rate corresponding to the intensity (brightness) of the light output from the light source unit 21 within a predetermined range. As an example, assuming that the dimming rate at the brightest time is 100%, the lighting circuit 22 can adjust the dimming rate in the range of 5% or more and 100% or less. As a result, the lighting device 2 performs dimming control on the light (output light L1) output to one or more reflecting members 3. In particular, in the present embodiment, the lighting circuit 22 can individually adjust the dimming rate for each of the first light emitting element 211 and the second light emitting element 212.

The detection unit 23 detects the environment of the indoor space A1. That is, the detection unit 23 can acquire environmental information regarding the environment of the indoor space A1. The "environment" referred to in the present disclosure is a state of the indoor space A1, and in particular, includes the illuminance (brightness) that can act on the plant P1, the presence or absence of the person H1, the time zone, the temperature, the season, the weather, and the like. .. In the present embodiment, as an example, the detection unit 23 includes an illuminance sensor or a motion sensor. As a result, the detection unit 23 can detect the illuminance of the area where the lighting device 2 is installed in the indoor space A1 and the presence or absence of the person H1 in the vicinity thereof.

Here, the lighting device 2 performs dimming control according to at least one of the environmental information regarding the environment of the indoor space A1 and the control information regarding the execution status of the light control. In the present embodiment, the lighting device 2 performs dimming control according to the environmental information regarding the environment of the indoor space A1. That is, the lighting circuit 22 executes dimming control based on the detection result (environmental information) of the detection unit 23.

Further, in the present embodiment, the lighting device 2 further includes an optical system (lens or the like), a power supply circuit, or the like. The lighting device 2 receives power (electrical energy) from the power source and drives the light source unit 21, the lighting circuit 22, and the detection unit 23.

As shown in FIG. 3, the optical control system 1 includes a reflection member 3, an optical control unit 4, and a switching unit 5.

The reflecting member 3 reflects the output light L1 from the lighting device 2 as the reflected light L2 toward the plant P1. That is, the light output from the lighting device 2 until it reaches the reflective member 3 is the "output light L1", and the light reflected by the reflective member 3 until it reaches the plant P1 is the "reflected light L2". is there. In the present embodiment, the reflective member 3 mainly includes a mirror for reflecting light.

Here, as described above, the reflective member 3 is arranged above both the lighting device 2 and the plant P1. Therefore, the output light L1 is incident on the reflecting member 3 from below, and the reflecting member 3 reflects the reflected light L2 downward. As a result, the light (output light L1) output upward from the lighting device 2 is reflected downward by the reflecting member 3 and irradiates the plant P1 as the reflected light L2. The reflective member 3 will be described in detail in the column of "(2.3) Configuration of optical control system".

The light control unit 4 performs light control for changing at least one of the light distribution, the luminous flux, and the spectrum with respect to the reflected light L2. That is, the optical control system 1 has a function of performing optical control on the reflected light L2. As a result, it is possible to change at least one of the light distribution, the luminous flux, and the spectrum of the reflected light L2 that is reflected by the reflecting member 3 and irradiates the plant P1.

In the present embodiment, when one or more reflecting members 3 reflect light, light control is executed. That is, the light control unit 4 is integrated with the reflection member 3 so that the reflection member 3 also functions as the light control unit 4. Specifically, the function as the light control unit 4 is added to the reflective member 3 depending on the shape of the reflective surface of the reflective member 3 and the like. The optical control unit 4 will be described in detail in the column of "(2.3) Configuration of optical control system".

The switching unit 5 switches the object to be changed by optical control (hereinafter, also referred to as “control object”) in at least two or more of the light distribution, the luminous flux, and the spectrum. In other words, in the optical control system 1, the object (controlled object) to be changed by optical control can be switched among two or more of the light distribution, the luminous flux, and the spectrum. That is, in the optical control performed by the optical control unit 4, what is changed in the reflected light L2 can be switched by the switching unit 5. In the present embodiment, as an example, the switching unit 5 switches the controlled object in response to a manual operation in which the person H1 directly operates the switching unit 5. Therefore, the switching unit 5 has an operating member 51 (see FIG. 4) operated by the person H1.

The switching unit 5 can switch the control target in, for example, two of the light distribution, the luminous flux and the spectrum (light distribution and luminous flux, luminous flux and spectrum, or light distribution and spectrum). As an example, when switching the control target in the light distribution and the luminous flux, the switching unit 5 receives light between a state in which the light distribution of the reflected light L2 is changed and a state in which the luminous flux of the reflected light L2 is changed. The mode of the control unit 4 is switched. Alternatively, the switching unit 5 can switch the control target among the three, for example, light distribution, luminous flux, and spectrum. The switching unit 5 will be described in detail in the column of "(2.3) Configuration of optical control system".

(2.3) Configuration of Optical Control System Next, the configuration of the optical control system 1 according to the present embodiment will be described in more detail with reference to FIGS. 4 to 6D.

As shown in FIG. 4, the optical control system 1 includes a housing 11. The components of the optical control system 1, such as the reflective member 3, the optical control unit 4, and the switching unit 5, are provided in one housing 11. Then, the optical control system 1 is attached to the ceiling 102 by fixing the housing 11 to the ceiling 102. As a result, the entire optical control system 1 is installed on the ceiling 102. Therefore, at least one of the reflective members 3, which is a component of the optical control system 1, will be installed on the ceiling 102.

As shown in FIG. 4, the housing 11 has a base 111 and a cover 112. As an example, the housing 11 is made of synthetic resin.

The base 111 is formed in a rectangular plate shape. The cover 112 is formed in a box shape with an open lower surface, and is combined with the base 111 so as to cover the lower surface with the base 111. The base 111 and the cover 112 combined in this way form a thin box-shaped housing 11 as a whole. The housing 11 is fixed to the ceiling 102 with the lower surface of the base 111 facing downward.

An opening hole 113 is formed in the base 111. The opening hole 113 has a rectangular shape in a plan view, and penetrates a part of the base 111 in the thickness direction (vertical direction). The reflective member 3 is exposed from the lower surface of the housing 11 through the opening hole 113. Further, a hole for exposing the operating member 51 is formed at a position of the base 111 adjacent to the opening hole 113. Through this hole, the operating member 51 is exposed from the lower surface of the housing 11.

FIG. 5A is a schematic perspective view of the optical control system 1 with the cover 112 removed, as viewed from diagonally above. As shown in FIG. 5A, the reflective member 3 is held by the base 111. The reflective member 3 includes a structure 31. In the present embodiment, the reflective member 3 includes a plurality of (here, nine) structures 31. Each structure 31 is formed in a cubic shape. Since the surface of each structure 31 functions as a reflecting surface, the reflecting member 3 reflects the light (output light L1) from the illuminating device 2 on the surface of each structure 31.

The nine structures 31 are divided into three sets, with the three as one set. The three structures 31 of each set are arranged in a row along the horizontal direction substantially parallel to the horizontal plane. Further, the three sets of structures 31 are arranged in a direction substantially parallel to the horizontal plane and along a vertical direction orthogonal to the horizontal direction. As a result, the nine structures 31 are two-dimensionally arranged in the horizontal plane along each of the horizontal and vertical directions.

The base 111 has two sets of bearing portions 12 on both sides in the arrangement direction (lateral direction) of the three structures 31 of each set on the upper surface of the base 111. A rotating shaft 13 is bridged between the two bearing portions 12 of each set, and the rotating shaft 13 is supported by the two bearing portions 12 of each set in a rotatable state. The rotating shaft 13 is held in a state of penetrating the three structures 31 of each set. As a result, the three structures 31 of each set are connected so as to be skewered by one rotating shaft 13, and in this state, they are supported between the two bearing portions 12 of each set. Become. Further, a gear 14 is provided at one end of the rotating shaft 13.

Further, the base 111 has a pair of operation bearing portions 15 facing each other in the lateral direction on the upper surface of the base 111 on the side in the vertical direction of the opening hole 113. An operating rotary shaft 16 is bridged between the pair of operating bearing portions 15, and the operating rotating shaft 16 is supported by the pair of operating bearing portions 15 in a rotatable state. The operation rotation shaft 16 is held in a state of penetrating the operation member 51 formed in a disk shape. As a result, the operating member 51 is supported between the pair of operating bearing portions 15 in a state of being skewered by one operating rotating shaft 16. Further, an operation gear 17 is provided at one end of the operation rotation shaft 16.

Here, the operating gear 17 and the three gears 14 are connected by a belt 18 so that the rotational force of the operating gear 17 is transmitted to the three gears 14. In FIG. 5A, the belt 18 is shown by an imaginary line (two-dot chain line). Specifically, a belt 18 made of a toothed belt (Cogged Belt) is hung around the operating gear 17 and the three gears 14. As a result, when the operating gear 17 rotates, the rotational force of the operating gear 17 is transmitted to the three gears 14 via the belt 18.

According to the above-described configuration, when the operating member 51 rotates, its rotational force is transmitted to the structure 31 via the operating rotating shaft 16, the operating gear 17, the gear 14, and the rotating shaft 13. Therefore, when the operating member 51 rotates, the plurality of structures 31 rotate all at once in accordance with the rotation. At this time, each of the plurality of structures 31 rotates about the rotation shaft 13.

Here, as shown in FIG. 5B, each structure 31 included in the reflective member 3 has a plurality of (four in this case) reflective surfaces 31 to 314. Each of the plurality of reflecting surfaces 31 to 314 corresponds to different optical controls. Then, the reflecting member 3 executes light control when reflecting light on any of the plurality of reflecting surfaces 31 to 314, and the surface reflecting the light (output light L1) from the illuminating device 2 is a plurality of reflecting surfaces. By switching among 31 to 314, the target to be changed by optical control is switched. That is, the reflecting member 3 switches the surface facing the illuminating device 2 between the plurality of reflecting surfaces 31 to 314, thereby switching the surface reflecting the light (output light L1) from the illuminating device 2 and switching the control target. It is possible.

That is, in the present embodiment, as described above, the reflection member 3 also has a function as the light control unit 4, and depending on the shape of the reflection surface of the reflection member 3, the reflection member 3 can be used as the light control unit 4. Function is added. The structure 31 included in the reflection member 3 corresponds to each of the plurality of reflection surfaces 31 to 314 having different light control functions. That is, for example, when the light is reflected by the reflecting surfaces 31 to 314 corresponding to the light control called "light distribution", the target (control target) to be changed by the light control is the "light distribution". On the other hand, when the light is reflected by the reflecting surfaces 31 to 314 corresponding to the light control called "luminous flux", the object (controlled object) to be changed by the light control is the "luminous flux". Therefore, by switching the surface on which the reflecting member 3 reflects the light (output light L1) from the lighting device 2 among the plurality of reflecting surfaces 31 to 314, the object (control object) to be changed by the light control is switched. become.

In the present embodiment, among the structure 31 made of a cube (regular hexahedron), four surfaces excluding the two surfaces through which the shaft hole 315 through which the rotating shaft 13 penetrates form a plurality of reflecting surfaces 31 to 314. Therefore, as described above, each of the plurality of structures 31 rotates about the rotation shaft 13, so that the surface of the structure 31 exposed from the lower surface of the housing 11 through the opening hole 113 becomes a plurality of reflective surfaces 311. It will switch between ~ 314. In the example of FIG. 5A, when the operating member 51 rotates in the direction of the arrow R1, the structure 31 also rotates in the same direction as the operating member 51, so that the surface exposed from the lower surface of the housing 11 is the reflective surface 311, It will be switched in the order of 312, 313, 314. Further, by rotating the operating member 51, the direction of the reflecting surface exposed from the lower surface of the housing 11 (inclination angle with respect to the horizontal plane) can also be adjusted.

6A to 6D are schematic views schematically showing the functions of the reflecting surfaces 31 to 314. Here, as an example, the reflective surface 311 has no light control function, the reflective surface 312 has a “light distribution” function, the reflective surface 313 has a “light distribution”, and the reflective surface 314 has a light control function that changes the “luminous flux”. Suppose you have.

That is, as shown in FIG. 6A, the reflecting surface 311 is a plane mirror and generates reflected light L2 having a light distribution angle θ11 equivalent to that of the incident output light L1. The reflecting surface 311 reflects substantially all wavelength components of light, and changes (decrease, etc.) in the luminous flux of the reflected light L2 with respect to the output light L1 and changes in the spectrum do not occur substantially.

As shown in FIG. 6B, the reflecting surface 312 is a convex mirror and generates reflected light L2 having a light distribution angle of θ12 (θ12> θ11), which is wider than the incident output light L1. Therefore, on the reflecting surface 312, light control for changing the "light distribution" of the reflected light L2 is performed. The reflecting surface 312 reflects substantially all wavelength components of light, and changes (decrease, etc.) in the luminous flux of the reflected light L2 with respect to the output light L1 and changes in the spectrum do not occur substantially.

As shown in FIG. 6C, the reflecting surface 313 is a convex mirror and generates reflected light L2 having a light distribution angle of θ13 (θ13> θ11), which is wider than the incident output light L1. Therefore, on the reflecting surface 313, light control for changing the "light distribution" of the reflected light L2 is performed. However, the curvature of the reflecting surface 313 is smaller than the curvature of the reflecting surface 312, and the light distribution angle θ12 of the reflected light L2 on the reflecting surface 312 is wider than the light distribution angle θ13 of the reflected light L2 on the reflecting surface 313. (Θ12> θ13). The reflecting surface 313 reflects substantially all the wavelength components of the light, and the change (decrease, etc.) of the luminous flux of the reflected light L2 with respect to the output light L1 and the change in the spectrum do not occur substantially.

As shown in FIG. 6D, the reflecting surface 314 is a plane mirror coated with a light absorbing material, and generates reflected light L2 having a light distribution angle θ11 equivalent to that of the incident output light L1. Since a part of the light is absorbed by the light absorbing material on the reflecting surface 314, light control for changing (decreasing) the "luminous flux" of the reflected light L2 is performed. That is, the reflecting surface 314 generates reflected light L2 whose luminous flux is reduced (dimmed) as compared with the output light L1 incident on the reflecting surface 314. Since the reflecting surface 314 uniformly absorbs and reflects substantially all the wavelength components of the light, the change in the "light distribution" of the reflected light L2 with respect to the output light L1 and the change in the spectrum do not occur substantially. In FIG. 6D, the density of the shaded light (dot hatching) attached to the output light L1 and the reflected light L2 conceptually represents the luminous flux, and the reflected light L2 with a relatively thin shaded light is compared with the output light L1. Indicates that the luminous flux is reduced.

As described above, the structure 31 has a plurality of (four in this case) reflecting surfaces 31 to 314, and the surface for reflecting the light from the illuminating device 2 is switched between the plurality of reflecting surfaces 31 to 314. Thereby, it is possible to switch the action of the light control on the reflected light L2. As a result, in the optical control system 1 according to the present embodiment, the object (controlled object) to be changed by the optical control can be switched among two or more of the light distribution, the luminous flux, and the spectrum.

(2.4) Operation Example Next, an operation example of the optical control system 1 and the lighting system 10 according to the present embodiment will be described with reference to FIGS. 1A to 1C.

1A to 1C are schematic views showing a state in which a plant P1 is irradiated with light (reflected light L2) by an optical control system 1 in different modes. FIG. 1A is a normal mode in which the light control function is disabled, FIG. 1B is a wide-angle mode in which the "light distribution" is changed by light control, and FIG. 1C is a light control system in a dimming mode in which the "luminous flux" is changed by light control. It represents the operation of 1.

That is, in any mode, the lighting system 10 irradiates the reflection member 3 of the light control system 1 with the output light L1 from below by turning on the lighting device 2, and the reflection member 3 reflects the output light L1 downward. The reflected light is applied to the plant P1 as reflected light L2. Here, it is assumed that the lighting device 2 is lit at a dimming rate of 100%.

In the normal mode in FIG. 1A, the optical control system 1 passes the reflective surface 311 made of a plane mirror from the plurality of reflective surfaces 31 to 314 of each structure 31 in the reflective member 3 from the lower surface of the housing 11 through the opening hole 113. Expose. As a result, the reflecting surfaces 311 of the plurality of structures 31 arranged in the opening hole 113 form a reflecting surface group, and the light control system 1 uses the reflecting surface group to generate the output light L1 from the lighting device 2 with the plant P1. It is reflected as reflected light L2 toward. As a result, the reflected light L2 from the reflecting member 3 toward the plant P1 has a light distribution angle θ1 equivalent to that of the output light L1. Further, in the reflecting surface group composed of a plurality of reflecting surfaces 311, substantially all the wavelength components of the light are reflected, so that the luminous flux of the reflected light L2 with respect to the output light L1 changes (decreases, etc.) and the spectrum changes substantially. Absent.

On the other hand, in the wide-angle mode in FIG. 1B, the optical control system 1 passes the reflecting surface 312 (or 313) made of a convex mirror through the opening hole 113 among the plurality of reflecting surfaces 31 to 314 of each structure 31 in the reflecting member 3. It is exposed from the lower surface of the housing 11. As a result, the reflecting surfaces 312 (or 313) of the plurality of structures 31 arranged in the opening hole 113 form a reflecting surface group, and the optical control system 1 uses the reflecting surface group to output light from the lighting device 2. L1 is reflected toward the plant P1 as reflected light L2. As a result, light control for changing the "light distribution" of the reflected light L2 is performed, and reflected light L2 having a light distribution angle θ2 that is wider than the incident output light L1 is generated. That is, the light distribution angle θ2 of the reflected light L2 in the wide-angle mode is wider than the light distribution angle θ1 (see FIG. 1A) of the reflected light L2 in the normal mode, and the light control system 1 in the wide-angle mode has a relatively wide range. The plant P1 can be irradiated with light (reflected light L2). Further, in the reflecting surface group composed of a plurality of reflecting surfaces 312 (or 313), since substantially all the wavelength components of the light are reflected, the change (decrease, etc.) of the luminous flux of the reflected light L2 with respect to the output light L1 and the spectrum. There is almost no change.

Further, in the dimming mode in FIG. 1C, the light control system 1 sets the reflecting surface 314 made of a plane mirror coated with a light absorbing material among the plurality of reflecting surfaces 31 to 314 of each structure 31 in the reflecting member 3. It is exposed from the lower surface of the housing 11 through the opening hole 113. As a result, the reflective surfaces 314 of the plurality of structures 31 arranged in the opening hole 113 form a reflective surface group, and the optical control system 1 uses the reflective surface group to generate the output light L1 from the lighting device 2 with the plant P1. It is reflected as reflected light L2 toward. As a result, light control (dimming) for changing (decreasing) the "luminous flux" of the reflected light L2 is performed, and reflected light L2 having a reduced luminous flux as compared with the incident output light L1 is generated. That is, the light beam of the reflected light L2 in the dimming mode is reduced as compared with the light beam of the reflected light L2 in the normal mode, and the light control system 1 in the dimming mode has a relatively low intensity (reflection). Light L2) can be applied to the plant P1. Further, in the reflecting surface group composed of the plurality of reflecting surfaces 314, since substantially all the wavelength components of the light are uniformly absorbed and reflected, the change in the "light distribution" of the reflected light L2 with respect to the output light L1 and the spectrum. There is almost no change.

In FIG. 1C, the density of the shaded light (dot hatching) attached to the output light L1 and the reflected light L2 conceptually represents the luminous flux, and the reflected light L2 with a relatively thin shaded light is compared with the output light L1. Indicates that the luminous flux is reduced.

The mode switching of the optical control system 1 as described above is appropriately performed by the switching unit 5. In the present embodiment, since the switching unit 5 includes the operating member 51, the mode switching as described above is realized by operating the person H1 so as to rotate the operating member 51. As an example, such mode switching is performed according to the environment of the indoor space A1 (for example, illuminance (brightness), presence / absence of person H1, time zone, temperature, season, weather, etc.). Further, for example, the mode of the optical control system 1 may be switched according to the type of the plant P1 or the growth of the plant P1.

Here, the light control system 1 according to the present embodiment performs light control only on the reflected light L2 that irradiates the plant area A11 out of the plant area A11 (see FIG. 3) and the human area A12 (see FIG. 3). That is, the light control system 1, that is, the light control that changes at least one of the light distribution, the luminous flux, and the spectrum, is the light control for realizing light suitable for irradiating the plant P1 in particular. Therefore, the light-controlled reflected light L2 need only irradiate the plant area A11 out of the plant area A11 and the human area A12. In this way, the "area limiting function" that limits the area irradiated by the light-controlled reflected light L2 to only the plant area A11 can prevent the light-controlled reflected light L2 from irradiating the human area A12. Therefore, the light control system 1 can be used for the indoor space A1 in which the human H1 and the plant P1 coexist, but can irradiate the light suitable for the plant P1 without affecting the illumination of the human area A12. become.

Such an area limiting function can be realized by a light blocking filter as an example. That is, for example, a part of the reflected light L2 reflected by the reflecting member 3 is shielded by attaching the light shielding filter only to the reflecting surface corresponding to the person area A12 among the plurality of reflecting surfaces constituting the reflecting surface group. it can. As a result, the light (reflected light L2) irradiating the human area A12 is blocked, and the light controlled light (reflected light L2) reaches only the plant area A11, thereby realizing the area limiting function. Alternatively, for example, the light-controlled reflection by disabling the light control function (referred to as the reflection surface 311) only for the reflection surface corresponding to the human area A12 among the plurality of reflection surfaces constituting the reflection surface group. The reach of the light L2 can be limited. As a result, the light control function is disabled for the light (reflected light L2) irradiating the human area A12, and the light controlled light (reflected light L2) reaches only the plant area A11, so that the area limiting function is performed. It will be realized.

Further, in the lighting system 10 according to the present embodiment, as described above, the lighting device 2 adjusts according to at least one of the environmental information regarding the environment of the indoor space A1 and the control information regarding the execution status of the light control. Performs optical control. In this embodiment, in particular, the lighting device 2 executes dimming control based on the detection result (environmental information) of the detection unit 23.

The detection unit 23 can detect the illuminance of the area where the lighting device 2 is installed in the indoor space A1 and the presence / absence of a person H1 in the vicinity thereof. Therefore, as an example, the lighting device 2 starts from the lighting system 10 by increasing the dimming rate as the illuminance in the area where the lighting device 2 is installed in the indoor space A1, that is, the illuminance around the plant P1 becomes lower. Increase (brighten) the intensity of the light irradiating the plant P1. Further, as an example, in the lighting device 2, when the person H1 is present around the plant P1, the intensity of the light emitted from the lighting system 10 to the plant P1 is increased by increasing the dimming rate as compared with the case where the person H1 is not present. Raise (make it brighter).

Not limited to this example, the lighting device 2 performs dimming control according to environmental information such as time zone, temperature, season, and weather, and the light emitted from the lighting system 10 to the plant P1 according to the environmental information. You may adjust the strength of.

Alternatively, for example, the lighting device 2 performs dimming control according to the control information regarding the execution status of the light control of the light control system 1, and the intensity of the light emitted from the lighting system 10 to the plant P1 is determined by the control information. You may adjust. As an example, when the mode of the light control system 1 is the wide-angle mode, the lighting device 2 irradiates the plant P1 from the lighting system 10 by increasing the dimming rate as compared with the case of the dimming mode. Increase (brighten) the light intensity.

Further, for example, dimming control may be performed according to the type of plant P1 or the growth of plant P1.

By the way, in the lighting system 10 according to the present embodiment, the lighting device 2 can output light having the characteristics shown in FIG. 7. In FIG. 7, the horizontal axis is the wavelength and the vertical axis is the relative spectral power output from the photoreceptor cells of the retina, and the characteristics of the output light L1 in consideration of the luminosity factor of the human H1 are shown. The curve X1 shows the value obtained by multiplying the relative spectral power of the first light emitting element 211 that outputs white light by the human visual perception efficiency (Vλ), and the curve X2 is the relative spectroscopy of the second light emitting element 212 that outputs red light. The value obtained by multiplying the power by the human visual efficiency (Vλ) is shown. Since the second light emitting element 212 has a peak wavelength in the vicinity of 660 nm, the peak wavelength λ2 of the curve X2 is approximately 660 nm. On the other hand, since the first light emitting element 211 outputs white light, the peak wavelength λ1 of the curve X1 is approximately 560 nm. The relative spectroscopic power Y1 multiplied by the human visual efficiency (Vλ) at the peak wavelength λ1 (approximately 560 nm) of the curve X1 is the relative spectroscopy multiplied by the human visual efficiency (Vλ) at the peak wavelength λ2 (approximately 660 nm) of the curve X2. It is more than twice the power Y2.

According to the characteristics shown in FIG. 7, the integration ratio (area ratio) of the curve X1 (corresponding to white light) and the curve X2 (corresponding to red light) according to the human visual efficiency that the human H1 can see is approximately omitted. It becomes 10: 1, and the person H1 does not feel red or feels faintly. By irradiating the plant P1 with light having such a spectrum, the photosynthesis of the plant P1 is promoted, and the white flowers appear reddish and the green leaves or stems appear black because there are too many reds for white. It becomes easier to prevent discoloration. That is, according to the above-mentioned spectrum, it is necessary to leave a red component (a component near 660 nm) effective for photosynthesis and flower bud formation of the plant P1 while making the human H1 less likely to perceive redness and improving the appearance of the plant P1. Therefore, it is possible to irradiate light more effectively for plant growth than in the case of white light alone.

In order to realize the characteristics as illustrated in FIG. 7, the lighting device 2 emits the radiant energy output from the second light emitting element 212 that outputs red light and the radiation energy from the first light emitting element 211 that outputs white light. It is preferably 1/2 or less of the energy output. The "radiant energy" here means energy that moves from the first light emitting element 211 or the second light emitting element 212, which is a light source, into space, and joule (J) or the like is used as a unit. In FIG. 7, as an example, the output of radiant energy from the second light emitting element 212 that outputs red light is approximately 1/2 of the output of radiant energy from the first light emitting element 211 that outputs white light.

(3) Modified Example The first embodiment is only one of the various embodiments of the present disclosure. The first embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved. Each figure described in the present disclosure is a schematic view, and the ratio of the size and the thickness of each component in each figure does not necessarily reflect the actual dimensional ratio.

Hereinafter, modifications of the first embodiment will be listed. The modifications described below can be applied in combination as appropriate.

The light control system 1 and the lighting system 10 are used not only in offices but also in non-residential facilities such as stores, schools, factories, welfare facilities, hospitals or plant cultivation facilities, or residential facilities such as detached houses or apartment houses. You may.

Further, the optical control system 1 may be provided with one or more reflecting members 3, and may be provided with a plurality of reflecting members 3. When the optical control system 1 includes a plurality of reflective members 3, at least one of the plurality of reflective members 3 may be installed on the ceiling 102, and the remaining reflective members 3 may be installed on the ceiling 102. As an example, when the optical control system 1 includes two reflective members 3, one reflective member 3 is installed on the wall and the other reflective member 3 is installed on the ceiling 102. In this configuration, the light output from the lighting device 2 irradiates the reflective member 3 installed on the wall, is reflected by the reflective member 3 toward the reflective member 3 installed on the ceiling 102, and finally. In addition, the reflection member 3 installed on the ceiling 102 reflects the light toward the plant P1.

Further, one lighting system 10 may include a plurality of a plurality of lighting devices 2 for one light control system 1. In this case, the plurality of lighting devices 2 output light toward one light control system 1, so that the output light L1 output from the plurality of lighting devices 2 is indirectly reflected light L2 to one plant P1. It is possible to irradiate the target.

Further, the lighting system 10 is not limited to a configuration in which one is installed for each plant P1 arranged at one place. For example, one lighting system 10 is provided for a plurality of plants P1 arranged at a plurality of places. You may irradiate with light. In this case, the light control system 1 reflects, for example, the light output from one lighting device 2 toward the plants P1 at a plurality of locations by the reflecting member 3, so that the light is reflected at the plants P1 at the plurality of locations. Can be irradiated. Alternatively, the light control system 1 may sequentially change the direction in which the light is reflected by the reflecting member 3 with the passage of time so that the light is sequentially irradiated to the plants P1 at a plurality of locations, for example. ..

Further, in the first embodiment, the optical control system 1 does not require electric power (electrical energy) for its operation, but the present invention is not limited to this, and the optical control system 1 is configured to operate using electric power (electrical energy). You may. In this case, the optical control system 1 is electrically connected to the power source by, for example, an outlet, a hook ceiling rosette, an attic wiring, or a wiring duct. In this case, the optical control system 1 can automate the function switching of the optical control unit 4 by adopting a motor instead of the operating member 51 as the switching unit 5, for example. That is, the optical control system 1 can rotate the structure 31 by receiving electric power from the power source to drive the motor and transmitting the power generated by the motor to the gear 14 via the belt 18. .. Further, in this case, the optical control system 1 is not limited to the configuration in which electric power is supplied from the outside, and may be, for example, a battery-powered type equipped with a storage battery or the like.

Further, the optical control system 1 is not limited to the configuration in which the optical control system 1 is attached to the ceiling 102 with its entire surface exposed, and may be attached to the ceiling 102 in an appropriate manner. For example, the optical control system 1 may be embedded and installed in the ceiling 102 so that at least the lower surface is exposed. In this case, similarly to the downlight and the like, the optical control system 1 is fixed to the ceiling 102 in a state of being inserted into the construction holes formed in the ceiling panels constituting the ceiling 102.

Further, the shape of the structure 31 in the reflective member 3 is not limited to the cube. For example, in the first embodiment, the three structures 31 are connected by one rotating shaft 13, but the structure 31 connected by one rotating shaft 13 may be one in the first place. Often, in this case, the structure 31 may be, for example, a long rectangular parallelepiped along the axis of rotation 13. Further, the number of reflecting surfaces of the structure 31 is not limited to four, and the structure 31 is, for example, a triangular prism having three reflecting surfaces, a pentagonal prism having five reflecting surfaces, and a hexagon having six reflecting surfaces. It may be a columnar column or a polygonal columnar column having a seven-sided prism or more. Further, the structure 31 is not limited to a prismatic shape, but may be a cylindrical shape or the like.

Further, the reflective member 3 is not limited to the configuration having a plurality of structures 31, and may have only one structure 31.

Further, the functions of the reflecting surfaces 31 to 314 illustrated in FIGS. 6A to 6D are merely examples, and the light control functions given to the reflecting surfaces 31 to 314 can be changed as appropriate. For example, all of the plurality of reflecting surfaces 31 to 314 have a function of light control for changing the "luminous flux", and the degree of reducing the "luminous flux" (luminous intensity) is different for each of the plurality of reflecting surfaces 31 to 314. You may. Further, all of the plurality of reflecting surfaces 31 to 314 have a function of light control for changing the "light distribution", and the degree to which each of the plurality of reflecting surfaces 31 to 314 changes the "light distribution" (that is, reflected light). The light distribution angle of L2) may be different.

Further, in the first embodiment, the case where the light control unit 4 performs light control for changing the light distribution or the luminous flux with respect to the reflected light L2 is illustrated, but the present invention is not limited to this configuration. For example, the light control unit 4 may perform light control for changing both the light distribution and the luminous flux of the reflected light L2, or light control for changing the spectrum. For example, in the examples of FIGS. 6A to 6D, none of the plurality of reflecting surfaces 31 to 314 causes a substantially change in the spectrum with respect to the reflected light L2, but the present invention is not limited to this, and at least one of the plurality of reflecting surfaces 31 to 314 One may have an optical control function that changes the "spectrum". As an example, if the reflecting surface 311 is a plane mirror coated with a light absorbing material that absorbs light having a specific wavelength component, the reflected light L2 reduces the light intensity only for the specific wavelength component. A change in the spectrum will occur.

Further, when the optical control unit 4 performs optical control for changing the spectrum, it is preferable to reproduce the characteristics of the reflected light L2 as shown in FIG. 7. The characteristics shown in FIG. 7 are reproduced by setting the radiant energy of red light to 1/2 or less of the radiant energy of white light with respect to the reflected light L2 irradiating the plant P1. In other words, when the spectrum is changed by optical control, the optical control system 1 changes the spectrum of the reflected light L2 so that the radiant energy of the red light is 1/2 or less of the radiant energy of the white light. Is preferable. In this case, with respect to the reflected light L2, it is more preferable that the radiant energy of the red light is approximately 1/2 of the radiant energy of the white light. In other words, for the reflected light L2 emitted to the plant P1, the radiant energy of the white light is approximately twice the radiant energy of the red light. As a result, while making it difficult for human H1 to perceive redness and improving the appearance of plant P1, by leaving a red component (component near 660 nm) effective for photosynthesis and flower bud formation of plant P1, white light alone is used. Light irradiation that is more effective for plant growth can be performed than in the case.

Further, it is not essential that all of the plurality of structures 31 included in the reflecting member 3 expose the same reflecting surface among the plurality of reflecting surfaces 31 to 314 from the lower surface of the housing 11. For example, among the plurality of structures 31 included in the reflective member 3, some of the structures 31 expose the reflective surface 312 from the lower surface of the housing 11, and the remaining structures 31 expose another reflective surface 314 to the housing 11. It may be exposed from the lower surface of the. As an example, the reflective surface 312 and the reflective surface 314 are mixed in the reflective surface group composed of the plurality of structures 31 arranged in the opening hole 113, and the reflective surface group as a whole has a “light distribution”. It will have a function of light control to change and a function of light control to change "luminous flux".

Further, in the first embodiment, the lighting device 2 is not particularly fixed to the floor 101, but the lighting device 2 is not limited to this configuration, and the lighting device 2 is attached to the floor 101 by an appropriate means such as screwing, adhesion, or a magnet. It may be fixed to.

Further, the lighting device 2 is not limited to the configuration installed on the floor 101, and may be installed on, for example, a wall, a ceiling, a pillar, a door, a staircase, or a fixture such as a desk, a storage shelf, or a partition. Similarly, the reflective member 3 is not limited to the configuration installed on the ceiling 102, and may be installed on, for example, a wall, a floor, a pillar, a door, a staircase, or a fixture such as a desk, a storage shelf, or a partition.

Further, the plant P1 does not have to be arranged on the furniture, and may be installed on the floor 101 like the lighting device 2, and is not limited to the floor 101, for example, a wall, a ceiling, a pillar, a door, or the like. It may be installed on stairs or the like.

Further, the lighting device 2 is not limited to a configuration in which electric power is supplied from the outside, and may be, for example, a battery-powered type equipped with a storage battery or the like.

(Embodiment 2)
As shown in FIG. 8, the optical control system 1A according to the present embodiment is different from the optical control system 1 according to the first embodiment in that it includes an optical control unit 4 for performing optical control in addition to one or more reflective members 3. It's different. The light control system 1A and the lighting device 2 constitute a lighting system 10A. Hereinafter, the same configurations as those in the first embodiment will be designated by a common reference numeral and description thereof will be omitted as appropriate.

In the present embodiment, the light control unit 4 is arranged on the optical path of the light emitted from the lighting device 2 and irradiated to the plant P1, and transmits the light from the lighting device 2 toward the plant P1. Then, the light control unit 4 performs light control for changing at least one of the light distribution, the luminous flux, and the spectrum of the light transmitted through the light control unit 4. As a result, the light-controlled reflected light L2 irradiates the plant P1.

In particular, in the present embodiment, like a "wind shield" installed in front of the air outlet of the air conditioner (target side) in order to prevent the wind from the air conditioner from directly hitting the target (person). The light control unit 4 is arranged on the target (plant P1) side of the reflection member 3. That is, the light control unit 4 is arranged between the reflection member 3 and the plant P1. As a result, the reflected light L2 reflected by the reflecting member 3 does not directly irradiate the plant P1, but irradiates the plant P1 through the light control unit 4. Then, when the reflected light L2 passes through the light control unit 4, the light control unit 4 performs light control for changing at least one of the light distribution, the luminous flux, and the spectrum of the reflected light L2. As a result, the light-controlled reflected light L2 irradiates the plant P1.

As an example in FIG. 8, the optical control system 1A is in the wide-angle mode. Therefore, the light control unit 4 performs light control for changing the "light distribution" of the reflected light L2, and generates reflected light L2 having a light distribution angle θ2 that is wider than the output light L1.

Further, as a modification of the second embodiment, the light control unit 4 may be arranged between the lighting device 2 and the reflecting member 3. In this case, the light control unit 4 transmits the output light L1 from the lighting device 2 toward the reflecting member 3, and performs light control for changing at least one of the light distribution, the luminous flux, and the spectrum of the output light L1. As a result, the light-controlled output light L1 is incident on the reflective member 3, and as a result, the light-controlled reflected light L2 is irradiated on the plant P1.

The various configurations (including the modified examples) described in the second embodiment can be appropriately combined with the various configurations (including the modified examples) described in the first embodiment.

(Summary)
As described above, the optical control system (1,1A) according to the first aspect is a system for irradiating a plant (P1) arranged in an indoor space (A1) with light. The optical control system (1,1A) includes one or more reflective members (3). One or more reflecting members (3) are arranged above both the lighting device (2) and the plant (P1), and the light from the lighting device (2) is directed toward the plant (P1). It is reflected as L2). The light control system (1,1A) controls the reflected light (L2) by changing at least one of the light distribution, the luminous flux, and the spectrum, and the light-controlled reflected light (L2) is used as a plant. Irradiate (P1).

According to this aspect, the plant (P1) is irradiated with the reflected light (L2) reflected by one or more reflecting members (3) located above both the lighting device (2) and the plant (P1). .. Therefore, even if the lighting device (2) itself is not above the plant (P1), the plant (P1) can be irradiated with light from above. Moreover, the reflected light (L2) that has been appropriately light-controlled by the light control system (1, 1A) is irradiated to the plant (P1). Therefore, even if the lighting device (2) itself is not a dedicated device designed for growing the plant (P1), the plant (P1) can be irradiated with light suitable for growing the plant (P1). In short, according to the light control system (1,1A), the arrangement and specifications of the lighting device (2) are compared with the case where the light from the lighting device (2) is directly applied to the plant (P1). The degree of freedom in lighting design can be increased, and it becomes easier to improve the degree of freedom in lighting design.

In the optical control system (1,1A) according to the second aspect, in the first aspect, at least one of the one or more reflective members (3) is installed on the ceiling (102).

According to this aspect, since at least one of the one or more reflective members (3) is installed on the ceiling (102), it is less likely to get in the way as compared with the case where it is installed on the floor (101) or the like.

In the optical control system (1, 1A) according to the third aspect, in the first or second aspect, the object to be changed by the optical control can be switched between two or more of the light distribution, the luminous flux and the spectrum. is there.

According to this aspect, for example, by switching the object to be changed by light control according to the environment of the indoor space (A1), the type of the plant (P1), the growth of the plant (P1), etc., the plant (P1) It becomes easier to irradiate the plant (P1) with light more suitable for growing.

In the optical control system (1,1A) according to the fourth aspect, in the third aspect, one or more reflective members (3) have a plurality of reflective surfaces (311 to 314) corresponding to different optical controls. Includes the structure (31) having. The one or more reflecting members (3) execute light control when reflecting light on any of the plurality of reflecting surfaces (311 to 314), and a plurality of surfaces reflecting the light from the illuminating device (2). By switching in the reflecting surface (311 to 314), the object to be changed by light control is switched.

According to this aspect, for example, by rotating the structure (31) and switching the surface reflecting the light from the illuminating device (2) among the plurality of reflecting surfaces (311 to 314), it is relatively easy. With such a configuration, it is possible to switch the target to be changed by optical control.

In the optical control system (1, 1A) according to the fifth aspect, in any one of the first to third aspects, one or more reflecting members (3) execute light control when reflecting light.

According to this aspect, since one or more reflective members (3) also have a light control function, it is not necessary to provide a member having a light control function separately from the one or more reflective members (3), and the configuration is simplified. It is possible to plan.

In the optical control system (1,1A) according to the sixth aspect, in any one of the first to fifth aspects, when the spectrum is changed by optical control, the radiant energy of red light with respect to the reflected light (L2) is increased. The spectrum is changed so that it is less than 1/2 of the radiant energy of white light.

According to this aspect, while making it difficult for humans (H1) to perceive redness and improving the appearance of plants (P1), white components are left which are effective for photosynthesis and flower bud formation of plants (P1). Light irradiation that is more effective for plant growth can be performed as compared with the case of light alone.

In the optical control system (1,1A) according to the seventh aspect, in any one of the first to sixth aspects, the indoor space (A1) includes a plant area (A11) in which a plant (P1) is arranged and a plant. A person area (A12) in which a person (H1) exists separately from the area (A11) is included. The light control system (1,1A) controls light only for the reflected light (L2) that irradiates the plant area (A11) of the plant area (A11) and the human area (A12).

According to this aspect, it is possible to suppress the light-controlled reflected light (L2) from irradiating the human area (A12). Therefore, even in the indoor space (A1) where the human (H1) and the plant (P1) coexist, the light suitable for the plant (P1) is irradiated without affecting the lighting of the human area (A12). It becomes possible to do.

The lighting system (10, 10A) according to the eighth aspect includes an optical control system (1, 1A) according to any one of the first to seventh aspects, and a lighting device (2).

According to this aspect, the plant (P1) is irradiated with the reflected light (L2) reflected by one or more reflecting members (3) located above both the lighting device (2) and the plant (P1). .. Therefore, even if the lighting device (2) itself is not above the plant (P1), the plant (P1) can be irradiated with light from above. Moreover, the reflected light (L2) that has been appropriately light-controlled by the light control system (1, 1A) is irradiated to the plant (P1). Therefore, even if the lighting device (2) itself is not a dedicated device designed for growing the plant (P1), the plant (P1) can be irradiated with light suitable for growing the plant (P1). In short, according to the lighting system (10, 10A), the arrangement and specifications of the lighting device (2) are as compared with the case where the light from the lighting device (2) is directly applied to the plant (P1). The degree of freedom can be increased, and it becomes easier to improve the degree of freedom in lighting design.

In the lighting system (10, 10A) according to the ninth aspect, in the eighth aspect, the lighting device (2) performs dimming control on the light output to one or more reflecting members (3).

According to this aspect, the light loss in the light control system (1,1A) can be reduced while changing the luminous flux of the reflected light (L2) irradiating the plant (P1) by the dimming control.

In the lighting system (10, 10A) according to the tenth aspect, in the eighth or ninth aspect, the lighting device (2) has environmental information regarding the environment of the indoor space (A1) and control information regarding the execution status of light control. Dimming control is performed according to at least one of.

According to this aspect, the plant (P1) can be irradiated with light having a brightness suitable for at least one of the environment of the indoor space (A1) and the execution state of the light control.

The configurations according to the second to seventh aspects are not essential configurations for the optical control system (1,1A) and can be omitted as appropriate. The configuration according to the ninth or tenth aspect is not an essential configuration for the lighting system (10, 10A) and can be omitted as appropriate.

1,1A Light control system 2 Lighting device 3 Reflective member 10,10A Lighting system 31 Structure 102 Ceiling 31-13-14 Reflective surface A1 Indoor space A11 Plant area A12 People area H1 people L2 Reflected light P1 Plants

Claims (10)

An optical control system for irradiating plants placed in an indoor space with light.
It comprises one or more reflective members that are located above either the luminaire and the plant and that reflect the light from the illuminator toward the plant as reflected light.
Light control is performed on the reflected light to change at least one of light distribution, luminous flux, and spectrum, and the light-controlled reflected light is applied to the plant.
Optical control system. At least one of the one or more reflective members is installed on the ceiling.
The optical control system according to claim 1. The object to be changed by the light control can be switched within two or more of the light distribution, the luminous flux, and the spectrum.
The optical control system according to claim 1 or 2. The one or more reflective members include a structure having a plurality of reflective surfaces, each of which corresponds to the light control.
The one or more reflecting members execute the light control when reflecting light on any of the plurality of reflecting surfaces, and switch the surface reflecting the light from the lighting device among the plurality of reflecting surfaces. By doing so, the target to be changed by the optical control is switched.
The optical control system according to claim 3. When the one or more reflecting members reflect light, the light control is executed.
The optical control system according to any one of claims 1 to 3. When the spectrum is changed by the light control, the spectrum of the reflected light is changed so that the radiant energy of the red light is 1/2 or less of the radiant energy of the white light.
The optical control system according to any one of claims 1 to 5. The indoor space includes a plant area in which the plant is arranged and a person area in which a person exists separately from the plant area.
Of the plant area and the person area, the light control is performed only on the reflected light that irradiates the plant area.
The optical control system according to any one of claims 1 to 6. The optical control system according to any one of claims 1 to 7.
The lighting device and
Lighting system. The lighting device performs dimming control on the light output to the one or more reflecting members.
The lighting system according to claim 8. The lighting device performs dimming control according to at least one of environmental information regarding the environment of the indoor space and control information regarding the execution status of the light control.
The lighting system according to claim 8 or 9.

Images