JP2014117245A - Panel for plant cultivation and illuminating device for plant cultivation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel for plant cultivation 4 which is capable of suppressing a risk that a light source is exposed to water in feeding water to plants and a risk that heat generated from the light source causes adverse effect on an adjacent plant body or culture medium, and uniformly irradiating lower parts of plants with light, and securing a space around plants in performing hydroponics.SOLUTION: The panel for plant cultivation comprises: a light guide 2 which includes a light introducing surface 2a for introducing light at an end portion and emits introduced light from a light emitting surface 2b while guiding the light inside itself; and a light source 1 provided along the light introducing surface 2a. The light guide 2 includes a reflection sheet 3 in a region facing a region of the light emitting surface 2b from which the introduced light is emitted, and through holes penetrating between the light emitting surface 2b and a surface 2c facing the light emitting surface 2b are formed in the light guide 2.

Description

  The present invention relates to a plant cultivation panel capable of irradiating light on a plant to be grown and a plant cultivation lighting device including such a plant cultivation panel.

  In recent years, in the agricultural field, techniques for cultivating plants using artificial light such as fluorescent tubes and LEDs (light emitting diodes) have attracted attention, and the number of plant factories is also increasing.

  Fig.9 (a) is a figure which shows the irradiation amount of the light to a plant at the time of growing a plant in a plant factory.

  As shown in the figure, when a plant is cultivated in a plant factory, light is generally exposed only from above the plant by irradiating light from above the plant. As a result, sufficient light does not reach the entire plant, particularly the lower part of the plant, and there is a risk that plant growth may be hindered.

  Such a problem also occurs in the case of window cultivation using sunlight.

  FIG.9 (b) is a figure which shows the irradiation amount of the light to the plant at the time of window cultivation using sunlight.

  As shown in the figure, when window cultivation is performed using sunlight, sunlight spreads only to a part of the plant body, and there is a possibility that the growth of the plant may be hindered.

  As described above, when artificial light or sunlight does not reach the whole plant sufficiently, the amount of photosynthesis in the whole plant is insufficient, so that the growth of the plant is suppressed.

  Such problems are considered to be particularly problematic in the future when growing tall crops such as fruit vegetables that are expected to be grown at plant factories and windows.

  Therefore, in order to solve such a problem, Patent Literature 1 discloses a lighting device for a plant having a configuration in which a light-emitting body having an LED or the like is provided directly on a medium in which a plant is planted. .

  FIG. 10 is a diagram showing a plant lighting device described in Patent Document 1. As shown in FIG.

  As shown in the drawing, the strawberry 51 is planted in the soil (medium) 52 of the farm field 50 in the cultivation house, and the linear light emitter 30 is at an intermediate position where the strawberry 51 is planted in two rows. Yes, arranged directly on the soil 52.

  The length of the linear light emitter 30 is set to a predetermined length according to the length of the field 50.

  The linear light emitter 30 includes a plurality of light emitting diodes and a linear substrate 31, and the light emitting diode emits white light toward the upper surface of the linear substrate 31, and the white light is emitted from the linear substrate. It is scattered on the upper surface 3 of 31 and the irradiation angle is widened and irradiated upward, and the back side of the leaf 51 </ b> A of the strawberry 51 is irradiated.

  According to Patent Document 1, according to such a configuration, most of the light emitted from the linear light emitter 30 directly hits the plant. It is described that it can irradiate light, can prevent leakage of illumination light from the cultivation house, and can be used in hydroponics by placing the linear light emitter 30 on the cultivation panel. ing.

JP 2012-19715 A (published February 2, 2012)

  However, the plant lighting device described in Patent Document 1 has the following problems.

  Since the illuminant having an LED or the like is placed directly on the surface of the plant culture medium, the illuminant may be exposed to water when water is supplied to the plant.

  In addition, heat generated from the linear light emitters in which LEDs and the like are densely arranged may adversely affect adjacent plants and culture media.

  Moreover, when carrying out hydroponics, since the said light-emitting body is set | placed on a cultivation panel, the separate space for providing the said light-emitting body is required.

  Furthermore, since the said light-emitting body is a linear light-emitting body, light is irradiated only from the linear area | region which is a part on a culture medium, and light is not irradiated uniformly to the plant lower part. Moreover, since it is a linear light-emitting body, light will be interrupted | blocked easily by the leaf which fell, the fallen leaf, etc.

  The present invention has been made in view of the above-mentioned problems, and when water is supplied to a plant, the light source may be exposed to water, and the heat generated from the light source may adversely affect nearby plants and culture media. The purpose of the present invention is to provide a plant cultivation panel and a plant cultivation lighting device that can suppress light and uniformly illuminate the lower part of the plant, and can secure a space around the plant when hydroponically cultivating. And

  In order to solve the above problems, the plant cultivation panel of the present invention is a plant cultivation panel having a through hole, and has a light introduction surface for introducing light at an end portion, and the introduced light is provided. A light guide that emits light from a light exit surface while being guided inside, and a light source provided along the light introduction surface, wherein the light guide includes the introduced light in the light exit surface. The region facing the region where the light is emitted has a reflecting surface, and the through hole in the light guide passes through between the light emitting surface and the surface facing the light emitting surface. It is a feature.

  In order to solve the above-mentioned problems, a lighting device for plant cultivation of the present invention is characterized by including the plant cultivation panel and an illumination mechanism that emits light from the upper side of the plant.

  As described above, the panel for plant cultivation of the present invention has a light introduction surface for introducing light at the end, and a light guide that emits light from the light emission surface while guiding the introduced light inside. A light source provided along the light introduction surface, and the light guide has a reflection surface in a region facing the region where the introduced light is emitted in the light emission surface. The through hole in the light guide is configured to penetrate between the light emitting surface and a surface facing the light emitting surface.

  Moreover, the lighting apparatus for plant cultivation of this invention is the structure provided with the said panel for plant cultivation, and the illumination mechanism which irradiates light from the upper side of a plant.

  Therefore, when water is supplied to plants, the risk of the light source being exposed to water and the heat generated by the light source can suppress the risk of adverse effects on nearby plants and culture media, and the lower part of the plant can be irradiated with light uniformly. When hydroponically cultivating, a plant cultivation panel and a plant cultivation lighting device that can secure a space around the plant can be realized.

It is a figure which shows the case where plant cultivation is carried out using the panel for plant cultivation of one embodiment of this invention. It is a figure which shows the light guide with which the panel for plant cultivation of one embodiment of this invention was equipped, and the through-hole formed in the light guide. It is a figure which shows the case where the hose for supplying a culture solution, air, etc. is passed through the through-hole formed in the light guide with which the panel for plant cultivation of one embodiment of this invention was equipped. It is a figure for demonstrating the effect in case the reflective sheet is provided in the side surface of the through-hole formed in the light guide with which the panel for plant cultivation of one embodiment of this invention was equipped. It is a figure which shows the illuminating device for plant cultivation of other one Embodiment of this invention. It is a figure which shows an example of the shape of the through-hole which can be formed in the light guide of the panel for plant cultivation of other one Embodiment of this invention. It is a figure which shows an example of the light source which can be provided in the panel for plant cultivation of other one Embodiment of this invention. It is a figure which shows the case where plant cultivation is carried out using the panel for plant cultivation of other one Embodiment of this invention provided with the diffusion sheet. (A) is a figure which shows the irradiation amount of the light to a plant at the time of growing a plant in a plant factory, (b) is irradiation of the light to the plant at the time of carrying out window cultivation using sunlight It is a figure which shows quantity. It is a figure which shows the conventional illuminating device for plants described in patent document 1. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are merely one embodiment, and the scope of the present invention should not be construed as being limited thereto.

[Embodiment 1]
Hereinafter, the plant cultivation panel 4 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  FIG. 1 is a diagram illustrating a case where plant cultivation is performed using the plant cultivation panel 4.

  As illustrated, the plant cultivation panel 4 includes a light source 1, a light guide 2, and a reflection sheet 3 (reflection surface).

  Although not shown in the drawing, the light guide 2 is provided with a plurality of through holes for passing a hose for fixing the plant 6 or supplying a culture solution or air.

  Note that the roots of the plant 6 are immersed in the culture solution 5.

  The light guide 2 includes a light introduction surface 2a that introduces light from the light source 1, and a light emission surface 2b that emits light while guiding the introduced light inside.

  A reflective sheet 3 is provided on the surface 2c of the light guide 2 that faces the light exit surface 2b.

  FIG. 2 is a diagram illustrating the light guide 2 provided in the plant cultivation panel 4 and the through holes 7 formed in the light guide 2.

  As shown in FIG. 2A, the light guide 2 is formed with a plurality of through holes 7, and as shown in FIG. The light guide 2 is formed so as to penetrate between the light exit surface 2b and the surface 2c facing the light exit surface 2b.

  And in the surface 2c which opposes the light-projection surface 2b of the light guide 2, the reflective sheet 3 is not provided in the location in which the through-hole 7 is formed.

  That is, the light guide 2 includes the reflective sheet 3 in a region facing the region where the introduced light is emitted on the light emitting surface 2b. Since the portion where the through hole 7 is formed is not the light emitting surface 2b, the reflection sheet 3 is not provided.

  Since the plant cultivation panel 4 has such a configuration, the light emitted from the light source 1 is introduced from the light introduction surface 2a of the light guide 2 and mainly emitted from the light emission surface 2b of the light guide 2. It has come to be.

  Therefore, as shown in FIG. 1, the light emitted from the plant cultivation panel 4 can irradiate the lower part of the plant 6 with light.

  Therefore, by using the plant cultivation panel 4, it becomes possible to irradiate the lower part of the plant 6 with light even in a plant factory or window cultivation where the lower part of the plant 6 is less likely to be irradiated with light. Growth promotion can be realized.

  Moreover, it becomes possible to suppress the elongation of the stem by strong light irradiation to the base of the plant 6.

  As shown in FIG. 1, since the light source 1 is disposed at one end of the light guide 2, the light source 1 is separated from the light emitting surface 2 b of the light guide 2. Therefore, even if heat is generated in the light source 1, heat is not generated on the light emitting surface 2 b that is a light irradiation site, and even if the leaf of the plant 6 contacts the light emitting surface 2 b of the light guide 2, injury such as leaf burning. Does not occur.

  Hereinafter, the light source 1, the light guide 2, and the reflection sheet 3 provided in the plant cultivation panel 4 will be described in detail.

  The shape of the light source 1 is not particularly limited as long as it can be formed along the light introduction surface 2a of the light guide 2. For example, a point light source such as a light emitting diode (LED) or a rod shape such as a fluorescent tube is used. A light source or the like can be used.

  In the present embodiment, since the light emission efficiency is high and the size is small, a plurality of side light emission type LEDs are used as the light source 2 in consideration of the advantage that the light emission intensity per unit area can be increased. What was arranged in a line along the light introduction surface 2a was used.

  In addition, when using LED or a fluorescent tube etc. which are not a side light emission type, it should just be made to introduce light from the light introduction surface 2a of the light guide 2 in combination with a reflective member.

  The plurality of LEDs may be composed of white LEDs, or may be composed of three colors of red (R), green (G), and blue (B) LEDs.

  Further, in addition to LEDs of three colors, red (R), green (G), and blue (B), LEDs that can emit light in a specific wavelength region that is required may be included.

  When the plurality of LEDs are composed of white LEDs, there is a merit of reducing the cost. On the other hand, when the LEDs are composed of three colors of red (R), green (G), and blue (B), These can be individually controlled for each color, and a specific effect using only light in a predetermined wavelength region can be obtained as will be described in detail in the fourth embodiment.

  In addition, even when comprised by LED of three colors, red (R), green (G), and blue (B), white light can be irradiated on the light emission surface 2b of the light guide 2.

  In addition, the configuration of the plurality of LEDs can be appropriately determined according to the characteristics of the plant 6 and the environment in which the plant 6 is cultivated.

  Although not shown in FIG. 1, the plurality of LEDs are arranged on a substrate, and a driver for controlling lighting of each LED is mounted on the back side of the substrate.

  On the other hand, the light guide 2 can be formed of a transparent resin such as polycarbonate (PC) or polymethyl methacrylate (PMMA), but is not limited thereto, and is generally used as a light guide. Can be made of material.

  The light guide 2 is formed with a plurality of through holes 7 as shown in FIG. 2A. However, the through holes 7 may be formed at the same time as the light guide 2 is molded. Alternatively, the through hole 7 may be formed in a separate process after the light guide 2 is molded.

  The shape and size of the through hole 7 formed in the light guide 2 is formed so as to penetrate between the light exit surface 2b of the light guide 2 and the surface 2c facing the light exit surface 2b. Although not particularly limited, in the present embodiment, as illustrated in FIGS. 2A and 2B, the through hole 7 is formed in a cylindrical shape.

  In addition, what is necessary is just to determine the size of the through-hole 7 suitably according to the size of the plant 6 and the environment where the plant 6 is grown.

  The reflection sheet 3 is, for example, either a regular reflection sheet on which a highly reflective material such as silver or aluminum is vapor-deposited or a white reflection sheet having diffuse reflection, or the two reflection sheets are overlapped. It is possible to use a reflective sheet.

  In addition, when using the specular reflection sheet, by providing irregularities on at least one surface of the specular reflection sheet, or by applying a white material, in a desired region on at least one surface of the specular reflection sheet, A diffuse reflection layer can be easily formed.

  As described above, by using a reflection sheet having a diffusing function as the reflection sheet 3, light emitted from the light emission surface 2b of the light guide 2 becomes more uniform.

  In addition, the reflection sheet 3 is affixed on the surface 2c facing the light emitting surface 2b of the light guide 2.

  Since it is such a structure, when the plant 6 is hydroponically cultivated as illustrated in FIG. 1, the light leakage to the culture solution 5 can be prevented by the reflection sheet 3.

  In addition, in this Embodiment, although the case where the panel 4 for plant cultivation is used for hydroponics is mentioned as an example, it is not limited to this, The panel 4 for plant cultivation is water. Of course, it can use also for cultivation methods other than cultivation.

  FIG. 3 is a diagram showing a case where a hose 8 for supplying a culture solution, air, or the like is passed through a through hole 7 formed in the light guide 2 provided in the plant cultivation panel 4.

  As shown in FIG. 3A, the through hole 7 is used not only for fixing the plant 6 but also for passing a hose 8 for supplying a culture solution or air.

  And since light is irradiated also from the through-hole 7, as FIG.3 (b) shows in figure, as the light source 1, the light of the wavelength range which has disinfection and a bactericidal effect is emitted to the emitted light. By using a light source including the medium, a culture solution hose or an air hose can be passed through the through-hole 7, and light of a wavelength having a sterilization / sterilization effect can be applied to sterilize the culture solution or the like.

  FIG. 4 is a diagram for explaining the effect when the reflective sheet (reflective member) 3 is provided also on the side surface of the through hole 7.

  4A shows a case where the reflection sheet 3 is not provided on the side surface of the through hole 7, and FIG. 4B shows a case where the reflection sheet 3 is provided on the side surface of the through hole 7. FIG.

  In the present embodiment, the reflective sheet provided on the surface 2c facing the light exit surface 2b of the light guide 2 and the reflective sheet provided on the side surface of the through hole 7 differ only in shape and size, and are the same material. Although the thing of a different material is used, you may use the thing of a different material.

  As shown in the drawing, the optical path can be adjusted by the presence or absence of the reflection sheet 3 provided on the side surface of the through hole 7, and the presence or absence of light irradiation on the stem 6a of the plant 6 can also be adjusted.

  When using the conventional cultivation panel which consists of foamed polystyrene etc., it was necessary to arrange | position another light-emitting body on the conventional cultivation panel, and it was difficult to ensure the space around a plant.

  On the other hand, by using the plant cultivation panel 4 that also serves as a light emitter, a wider space around the plant can be secured.

  In the present embodiment, the flat light guide 2 is used from the viewpoint of securing a wider space around the plant, but the shape of the light guide 2 is not limited to this.

  Moreover, in the case of the conventional cultivation panel which consists of a polystyrene foam etc., since the surface was uneven | corrugated, there existed a problem that a microbe and algae were easy to adhere and it also took time and effort to wash | clean the adhered microbe and algae.

  On the other hand, the light emitting surface 2b of the light guide 2 provided in the plant cultivation panel 4 has no unevenness compared to the surface of a conventional cultivation panel made of foamed polystyrene, etc., so that bacteria and algae are less likely to adhere. Washing is also available.

[Embodiment 2]
Next, a second embodiment of the present invention will be described based on FIG. The plant cultivation lighting device 20 according to the present embodiment further includes an illumination mechanism 9 that emits light from the upper side of the plant 6 in addition to the plant cultivation panel 4 described in the first embodiment. Other configurations are as described in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 5 is a diagram illustrating a schematic configuration of the plant cultivation lighting device 20.

  As illustrated, the plant cultivation lighting device 20 further includes an illumination mechanism 9 that emits light from the upper side of the plant 6 in addition to the plant cultivation panel 4 that can irradiate the lower part of the plant 6 with light. ing.

  The illumination mechanism 9 is not particularly limited as long as it is an illumination device that can irradiate light from above the plant 6. For example, a light emitting diode (LED) or a fluorescent tube can be used.

  By using the plant cultivation lighting device 20, it is possible to irradiate relatively uniform light from both the upper side and the lower side of the plant 6, and the amount of irradiation light from each direction (upper side and / or lower side). It can be controlled relatively easily.

[Embodiment 3]
Next, a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the shapes of the through holes 7a and 7b formed in the light guide 2 'provided in the plant cultivation panel are different from those in the first and second embodiments, and other configurations are implemented. As described in the first and second embodiments. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 and 2 are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 6 is a diagram illustrating an example of the shape of the through holes 7a and 7b that can be formed in the light guide 2 ′.

  As shown in FIG. 6A, the through-hole 7a breaks off the through-hole 7a as it approaches the surface 2c 'facing the light exit surface 2b' from the light exit surface 2b 'of the light guide 2'. It is formed so as to continuously change in the direction in which the area increases.

  On the other hand, as illustrated in FIG. 6B, the through hole 7 b increases from the light emitting surface 2 b ′ of the light guide 2 ′ to the surface 2 c ′ facing the light emitting surface 2 b ′ as it approaches the through hole 7 b. It is formed so as to continuously change in a direction in which the cross-sectional area becomes smaller.

  In addition to the cylindrical through hole 7, the light guide 2 'of the present embodiment requires through holes 7a and 7b as shown in FIGS. It is formed in the place.

  In the portion where the through hole 7a illustrated in FIG. 6A is formed in the light guide 2 ′, light near the fixed position of the plant 6 can be raised, and the light intensity near the plant root is increased. be able to.

  By using the through hole 7a having such a shape, for example, it is possible to further enhance the light irradiation effect on the strawberry crown and the light irradiation effect on the back surface of the leaf vegetable leaf.

  It is also possible to suppress stem elongation by intense light irradiation to the base of the plant.

  On the other hand, in the place where the through hole 7b shown in FIG. 6B is formed in the light guide 2 ′, the light near the fixed position of the plant 6 can be lowered, and the light guide 2 ′ By transmitting light to the lower surface, it is possible to shine light directly on the root of the plant 6.

  In addition, the reason why the light in the vicinity of the fixed position of the plant 6 can be raised or lowered in this manner is that the side surfaces of the through holes 7a and 7b are provided with an angle. This is because the light is emitted upward or downward.

  In addition, you may provide a reflective sheet in the side surface of through-hole 7a * 7b as needed.

  Therefore, by providing the through hole 7a or the through hole 7b at a necessary portion of the light guide 2 ′, a plant cultivation panel that can control the light irradiation direction in various directions can be realized.

[Embodiment 4]
Next, based on FIG. 7, a fourth embodiment of the present invention will be described. In the plant cultivation panel of the present embodiment, the light source is composed of a plurality of red light emitting diodes 10R, green light emitting diodes 10G, and blue light emitting diodes 10B each emitting light in different wavelength regions, and the light emitting diodes 10R and 10G. 10B is different from Embodiments 1 to 3 in that it can be controlled individually or for each group that emits light in the same wavelength region, and other configurations are implemented. As described in the first to third embodiments. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 3 are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 7 illustrates a plant cultivation panel including a plurality of light emitting diodes 10R, 10G, and 10B that can be controlled individually or for each group that emits light in the same wavelength region, and the light guide 2. FIG.

  Since the plurality of light emitting diodes 10R, 10G, and 10B can be controlled individually or for each group that emits light in the same wavelength region, white light is emitted from the light emitting surface or through hole 7 of the light guide 2. Light in a predetermined wavelength region indicating red, light in a predetermined wavelength region indicating red, light in a predetermined wavelength region indicating green, and light in a predetermined wavelength region indicating blue can be selectively emitted.

  Furthermore, light of a predetermined wavelength region can be selectively emitted only from the light emitting surface of the predetermined region or the through hole 7.

  Therefore, for example, by irradiating the leaves of plants with light in a predetermined wavelength region showing blue, it becomes possible to induce pore opening and promote growth.

  Further, for example, by irradiating far red light to the base of the plant, elongation of a leaf or the like from the growth point can be induced.

  In addition, when a culture solution hose is passed through a predetermined through-hole 7, it is possible to sterilize the culture solution by applying light of a wavelength having a sterilizing / sterilizing effect only to the corresponding through-hole 7.

  In the present embodiment, the red light emitting diode 10R, the green light emitting diode 10G, and the blue light emitting diode 10B are used. However, the present invention is not limited to this, and may be necessary depending on the environment in which the plant is grown. A light source that emits light in a predetermined wavelength region can be included.

  In the present embodiment, the light source is disposed at each end of the light guide 2 (in this case, four ends), but the present invention is not limited to this. It may be arranged only at one to three ends.

[Embodiment 5]
Next, a fifth embodiment of the present invention will be described with reference to FIG. The plant cultivation panel 4a of the present embodiment is different from the first to fourth embodiments in that a diffusion sheet (diffusion member) 11 is provided on the light exit surface 2b of the light guide 2. Other configurations are the same as those described in the first to fourth embodiments. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 4 are given the same reference numerals, and descriptions thereof are omitted.

  The diffusion member sheet 11 is formed so as to cover the entire light emitting surface 2 b of the light guide 2, but is not provided at a place where the through hole 7 is provided.

  The plant cultivation panel 4a can be suitably used when more uniform light needs to be irradiated from the lower part of the plant.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and the present invention can be obtained by appropriately combining technical means disclosed in different embodiments. Embodiments are also included in the technical scope of the present invention.
(Summary)
The plant cultivation panel according to one embodiment of the present invention is a plant cultivation panel having a through hole, and has a light introduction surface for introducing light at an end, and guides the introduced light inside. And a light source provided along the light introduction surface, and the light guide emits the introduced light in the light emission surface. The region facing the region is provided with a reflecting surface, and the through hole in the light guide is configured to penetrate between the light emitting surface and the surface facing the light emitting surface.

  According to the above configuration, since the light source and the central portion of the light emitting surface are separated from each other, when supplying water to the plant, the light source may be exposed to water and the heat of the light source may cause the adjacent plant body or While suppressing the possibility of adversely affecting the medium, it is possible to realize a plant cultivation panel that can uniformly irradiate light to the lower part of the plant and can secure a space around the plant when hydroponically cultivating. .

  In the plant cultivation panel according to an embodiment of the present invention, a reflecting member may be provided on at least a part of the side surface of the through hole in the light guide.

  According to the said structure, an optical path can be adjusted with the reflection member provided in the side surface of a through-hole, for example, the presence or absence of the light irradiation to the stem of a plant can be adjusted.

  In the panel for plant cultivation according to an embodiment of the present invention, a plurality of the through holes are formed, and at least one of the through holes is formed of the light emitting surface and a surface facing the light emitting surface. It is preferable that the cross-sectional area of the through hole is continuously changed in the direction of decreasing or increasing.

  According to the said structure, the panel for plant cultivation which can control the irradiation direction of light to a more various direction is realizable.

  In the plant cultivation panel according to an embodiment of the present invention, the light source includes a plurality of light emitting diodes each emitting light in a different wavelength region, and the plurality of light emitting diodes are individually or at the same wavelength. It is preferable to be able to control each group that emits light in a region.

  According to the said structure, the light of a predetermined wavelength range can be selectively radiate | emitted from the light-projection surface or through-hole of the said light guide. It is also possible to selectively emit light in a predetermined wavelength region only from the light emitting surface or through hole in the predetermined region.

  A lighting device for plant cultivation according to an embodiment of the present invention includes the plant cultivation panel and a lighting mechanism that emits light from above the plant.

  According to the said structure, while being able to irradiate comparatively uniform light from the upper side and the lower side of a plant, the irradiation light quantity from each direction (upper side and / or lower side) is controlled comparatively easily. be able to.

  In the plant cultivation panel of one embodiment of the present invention, it is preferable that a diffusion member is provided on the light exit surface of the light guide.

  According to the said structure, the panel for plant cultivation which can irradiate more uniform light from the lower part of a plant is realizable.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a plant cultivation panel that can irradiate light on a plant to be grown and a plant cultivation lighting device that includes such a plant cultivation panel.

DESCRIPTION OF SYMBOLS 1 Light source 2 Light guide 2 'Light guide 2a Light introduction surface 2b Light emission surface 2b' Light emission surface 2c Surface opposite to light emission surface 2c 'Surface opposite to light emission surface 3 Reflective sheet (reflection surface / reflection member )
4 Plant cultivation panel 4a Plant cultivation panel 5 Culture solution 6 Plant 6a Plant stem 7 Through hole 8 Hose 9 Illumination mechanism 10R Red light emitting diode (light emitting diode)
10G green light emitting diode (light emitting diode)
10B Blue light emitting diode (light emitting diode)

Claims (5)

A panel for plant cultivation having a through hole,
A light guide that includes a light introduction surface that introduces light at an end, and that emits light from the light emission surface while guiding the introduced light inside;
A light source provided along the light introduction surface,
The light guide has a reflecting surface in a region facing the region where the introduced light is emitted in the light emitting surface,
The plant cultivation panel according to claim 1, wherein the through hole in the light guide penetrates between the light emitting surface and a surface facing the light emitting surface.   The plant cultivation panel according to claim 1, wherein a reflection member is provided on at least a part of a side surface of the through hole in the light guide. A plurality of the through holes are formed,
At least one of the through holes may continuously change in a direction in which the cross-sectional area of the through hole decreases or increases between the light emitting surface and a surface facing the light emitting surface. The panel for plant cultivation according to claim 1 or 2, wherein the panel for plant cultivation is formed. The light source comprises a plurality of light emitting diodes each emitting light in a different wavelength region,
4. The plant cultivation panel according to claim 1, wherein the plurality of light emitting diodes can be controlled individually or for each group that emits light in the same wavelength region. 5.   A plant cultivation lighting device comprising: the plant cultivation panel according to any one of claims 1 to 4; and an illumination mechanism that emits light from above the plant.

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