JP3198211U - Light source for plant cultivation and light source device for plant cultivation - Google Patents

Abstract

Provided is a light source for plant cultivation that realizes a color close to natural light while efficiently cultivating a plant, and does not impair the beauty of appreciating the plant. A light source 100 for plant cultivation includes a substrate 2 and a plurality of light sources 3 arranged on the substrate, and the light source emits a red light source 3a whose main wavelength is red, and a main wavelength that emits light. A green light source 3b that is green, and a blue light source 3c that emits blue light, and the number ratio between the red light source and the green light source satisfies a relationship of 4: 3 to 2: 1, and the red light source And the number ratio of the blue light sources satisfy the relationship of 2: 1 to 4: 1. [Selection] Figure 1

Description

  The present invention relates to a light source for plant cultivation and a light source device for plant cultivation.

  2. Description of the Related Art Conventionally, in plant cultivation, a technique for promoting plant growth by irradiating plant seedlings with artificial light has been adopted. By promoting the growth of plants, the cultivation period can be shortened and the number of harvests at the same place can be increased. Moreover, even if it is the same cultivation period, if a plant can be grown more largely, a yield can be increased.

  As a plant cultivation method using artificial light irradiation, for example, Patent Document 1 discloses a plant irradiation apparatus configured to alternately irradiate a plant with green light and white light. This irradiation device constitutes a change of day and night by alternately irradiating with green light having a wavelength of 500 to 570 nm and white light having a wavelength of 300 to 800 nm, thereby facilitating the commutation of the plant and cultivating the plant. is there.

  In addition, for example, Patent Document 2 discloses that light energy for culturing, growing, cultivating and cultivating plants can be obtained by simultaneously or alternately turning on a light emitting diode emitting blue light and a light emitting diode emitting red light. A light source for plant cultivation to be irradiated is disclosed. This light source for plant cultivation is intended to cultivate a plant with high energy efficiency by irradiating only light having a wavelength matching the light absorption peak of chlorophyll (around 450 nm and around 660 nm).

JP-A-6-276858 JP-A-8-103167

  For example, as shown in Patent Document 2, it is preferable to use only a light-emitting diode that emits blue light and red light when attention is paid only to the cultivatability of plants. However, an environment consisting only of blue light and red light has poor color rendering and makes humans feel uncomfortable. Therefore, for example, in an aspect in which a plant is cultivated in a store and the plant is provided (consumed) in the store (hereinafter referred to as “store-operated store consumption”), it is difficult to use it suitably.

  This invention solves the above problem, and makes it a subject to obtain the light source for plant cultivation which does not spoil the beauty | look which appreciates a plant, growing a plant efficiently.

The present inventors have intensively studied to solve the above problems.
As a result, by adding green light at a predetermined ratio to a light source suitable for plant cultivation, it is possible to obtain a plant cultivation light source that does not impair the beauty of appreciating plants while efficiently growing plants. I came up with the title and the present invention.
That is, the present invention relates to the following.

(1) A light source for plant cultivation according to one aspect of the present invention includes a substrate and a plurality of light sources arranged on the substrate, and the light source emits a red light source whose main wavelength is red, and light emission. A green light source whose main wavelength is green and a blue light source whose main wavelength is blue, and the number ratio of the red light source and the green light source satisfies a relationship of 4: 3 to 2: 1. And the number ratio of the red light source and the blue light source satisfies the relationship of 2: 1 to 4: 1.

(2) In the light source for plant cultivation according to (1) above, the light source may be regularly arranged on the substrate in plan view.

(3) In the light source for plant cultivation according to any one of (1) and (2), the substrate is rectangular, and the light source is 1 along the longitudinal direction and / or the lateral direction of the rectangle. You may arrange in the shape of a line more than a line.

(4) In the plant cultivation light source according to any one of (1) to (3), the red light source, the green light source, and the blue light source form a light source group, The number ratio of the red light source and the green light source satisfies a relationship of 4: 3 to 2: 1, and the number ratio of the red light source and the blue light source satisfies a relationship of 2: 1 to 4: 1. The light source group may be regularly arranged on the substrate in plan view.

(5) The light source for plant cultivation according to any one of (1) to (4), further including two or more terminal pairs connected to the light source, the red light source, the green light source, and The blue light sources may be connected to different terminal pairs.

(6) The plant cultivation light source according to any one of (1) to (4), further including two or more terminal pairs connected to the light source, the red light source and the blue light source May be connected to different terminal pairs, and the green light source may be connected to one of the terminal pairs.

(7) In the plant cultivation light source according to any one of (1) to (6), a peak wavelength of the red light source may be 650 nm to 670 nm.

(8) A plant cultivation light source device according to an aspect of the present invention is connected to the plant cultivation light source described in any one of (1) to (7) above and a terminal of the plant cultivation light source. A power supply control device.

  In the present invention, the “plant” includes at least leafy vegetables, fruit trees, cereals, and algae. In addition, the “plant” referred to in the present invention widely includes phytoplankton such as green algae, moss and the like.

  With the plant cultivation method according to one aspect of the present invention, a light source for plant cultivation that does not impair the beauty of appreciating plants while efficiently growing plants can be obtained.

It is a perspective schematic diagram of the light source for plant cultivation concerning one mode of the present invention. It is the top view which showed typically arrangement | positioning on the board | substrate of each light source in the light source for plant cultivation which concerns on 1 aspect of this invention. It is the figure which showed typically the electric power feeding method to the light source for plant cultivation which concerns on 1 aspect of this invention. It is the figure which showed typically the power feeding method to the light source for plant cultivation which concerns on another aspect of this invention. An example of the light source device for plant cultivation of an external type power supply control device of the present invention is shown. An example of the light source device for plant cultivation with a built-in power supply control device of the present invention is shown. An example of the light source device for plant cultivation of a partly built-in power control device of the present invention is shown.

  Hereinafter, preferred embodiments for carrying out the present invention will be described by way of examples. In addition, embodiment described below shows an example of typical embodiment of this invention, and, thereby, the range of this invention is not interpreted narrowly.

"Light source for plant cultivation"
FIG. 1 is a schematic perspective view of a plant cultivation light source according to an aspect of the present invention. A plant cultivation light source 100 according to an aspect of the present invention includes a main body 10 and terminals 21 to 24 provided at an end of the main end 10.

  The main body 10 includes a housing 1, a substrate 2 disposed inside the housing 1, and a light source 3 disposed on the substrate 2. The light source 3 includes a red light source 3a whose main wavelength for emitting light is red, a green light source 3b whose main wavelength for emitting light is green, and a blue light source 3c whose main wavelength for emitting light is blue.

The red light source 3a is a light source that can emit light having a wavelength of 600 to 730 nm, and a light source that can emit light having a peak wavelength of 650 to 670 nm can be suitably used.
The green light source 3b is a light source that can emit light having a wavelength of 470 to 600 nm, and a light source that can emit light having a peak wavelength of 515 to 535 nm can be suitably used.
The blue light source 3c is a light source that can emit light having a wavelength of 380 to 510 nm, and a light source that can emit light having a peak wavelength of 440 to 460 nm can be suitably used.

  Conventionally known light sources 3 including the red light source 3a, the green light source 3b, and the blue light source 3c can be used. Specifically, the wavelength selection is easy, and a light emitting diode (LED), a laser diode (LD), an electroluminescence (EL) element, a straight tube type, which can emit light with a large proportion of light energy in the effective wavelength range, A compact fluorescent lamp, a bulb-type fluorescent lamp, a high-pressure discharge lamp, a metal halide lamp, or the like can be used. When an EL element is used as the light source, it may be an organic EL element or an inorganic EL element.

  Among the light sources 3 described above, optical semiconductor elements such as light-emitting diodes (LEDs) and laser diodes (LDs) are small and have a long life, emit light at a specific wavelength depending on the material, and do not have unnecessary heat radiation. Therefore, even if the plant is irradiated in the vicinity, damage such as burning of the leaves hardly occurs. For this reason, when an optical semiconductor element is used as a light source, compared with other light sources, it is possible to obtain excellent energy efficiency with low power and a space-saving light source for plant cultivation.

In the red light source 3a, the green light source 3b, and the blue light source 3c, the red light and the green light satisfy a relationship of 4: 3 to 2: 1 in terms of the photon flux ratio, and the red light and the blue light have a photon flux ratio of 2: 1 to 1. It is installed in the main body 10 so as to satisfy the 4: 1 relationship. Here, the photon flux means the number of photons emitted from each light source per second. Plant photosynthesis is a reaction that occurs every time chlorophyll absorbs one photon. Therefore, the number of photons is more important than the energy of light.
Plants that grow by photosynthesis. Therefore, it is defined by the photon flux density ratio of the red light source 3a, the green light source 3b, and the blue light source 3c, and the red light and the green light satisfy the relationship of 4: 3 to 2: 1 in terms of the photon flux density ratio. Light may satisfy the relationship of 2: 1 to 4: 1 in terms of photon flux density ratio. The photon density is a value obtained by dividing the number of photons per second by the light receiving area of a substance when the substance is irradiated with light.

  It should be noted that this “photon flux density ratio” is only a photon irradiated to a plant, not the number of photons that the plant absorbs for photosynthesis. Plants generally absorb mainly blue light (400-500 nm) and red light (600-700 nm). In the present invention, green light is also irradiated to the plant at the same time. Therefore, just because the photon flux density ratio satisfies the above relationship does not mean that each light source supplies photons used for plant cultivation at this ratio.

As described above, the plant suitably absorbs blue light and red light and performs photosynthesis. Therefore, considering only the cultivation of plants, it is preferable to supply red light and blue light to the plants at a certain ratio. Here, the fixed ratio is a ratio in which the red light and the blue light have a photon flux ratio or a photon flux ratio of 2: 1 to 4: 1, and more preferably a ratio of 3: 1.
On the other hand, consider that a human visually recognizes this light source. When a human visually recognizes a light source that emits red light and blue light at the above-described ratio, the light becomes blue-violet light. Blue-violet light is far from natural light, so color rendering is poor. Therefore, humans are likely to feel uncomfortable under the environment of this light source.

Therefore, in the present invention, red light and blue light are added with green light while maintaining the relationship of the photon flux density ratio. Humans feel green light most strongly because of relative visibility. Therefore, the light emitted from the plant cultivation light source 100 controlled so that the photon flux ratios of the red light source 3a, the green light source 3b, and the blue light source 3c satisfy a predetermined relationship appears white to human eyes. Here, the predetermined relationship is that red light and green light have a photon flux density ratio of 4: 3 to 2: 1, and red light and blue light have a photon flux density ratio of 2: 1 to 4: 1. It means a relationship. In particular, it is preferable that the photon flux ratio of the red light source 3a, the green light source 3b, and the blue light source 3c satisfy the relationship of 3: 2: 1.
The light emitted from the plant cultivation light source 100 can artificially realize a color close to natural light, and this light is excellent in color rendering. Therefore, the human being in the environment of the plant cultivation light source 100 can spend without stress. Therefore, the stress of the worker engaged in the plant cultivation factory using the plant cultivation light source 100 can be reduced. In addition, a plant cultivation apparatus using the plant cultivation light source 100 can be exhibited in a restaurant or the like that performs store-and-store consumption without giving the customer unpleasant feeling.

  From the viewpoint of the plant, the light absorption peak of the plant is blue and red. Therefore, if the photon flux density ratio of red light and blue light maintains a constant relationship, plants can be efficiently cultivated even if other light is added. In the present invention, red light and blue light are added with green light while maintaining a constant relationship with the photon flux density ratio. Green light does not inhibit plant cultivation.

Here, a specific mode for the photon flux ratios of the red light source 3a, the green light source 3b, and the blue light source 3c to satisfy the above relationship will be described.
This photon flux ratio can be achieved by changing the output of each light source. As will be described later, in consideration of driving all the light sources 3 with the same current value, it is preferable to realize the number of light sources. Specifically, the number ratio of the red light source and the green light source satisfies the relationship of 4: 3 to 2: 1, and the number ratio of the red light source and the blue light source satisfies the relationship of 2: 1 to 4: 1. Is preferred. More preferably, the red light source 3a, the green light source 3b, and the blue light source 3c satisfy a 3: 2: 1 relationship in terms of the number ratio.
The same current value may be controlled by the output of a power source connected to each light source 3, or the resistance value of each light source 3 may be the same, and they may be arranged in series or in parallel.

  For example, a description will be given based on the example of FIG. In the plant cultivation light source 100 of FIG. 1, the shape of the main body 10 is a straight fluorescent lamp shape, and the substrate 2 is rectangular. It is preferable that the red light source 3a, the green light source 3b, and the blue light source 3c are regularly arranged on the rectangular substrate 2 with a constant current value supplied to each light source. By regularly arranging, the luminance distribution can be made uniform in the plane of the substrate 2.

Next, a specific example in the case where the substrate 2 is rectangular will be described with reference to FIGS. 2A to 2F show an example in which the red light source 3a, the green light source 3b, and the blue light source 3c satisfy the relationship of 3: 2: 1 in terms of the number ratio. When the substrate 2 is rectangular, the light sources 3 are preferably arranged in one or more rows along the longitudinal direction and / or the short direction of the rectangular substrate 2.
For example, when the substrate 2 is viewed in plan, it may be arranged in a square lattice shape as shown in FIGS. 2A to 2C, or may be arranged in a triangular lattice shape as shown in FIGS. You may do it. Here, the square of the unit lattice of the square lattice does not necessarily need to be a square. The unit cell of the triangular lattice does not necessarily have to be a regular triangle. In any case, the shape of the unit cell such that the light sources are uniformly arranged on the substrate, for example, a rectangle, a parallelogram, or an isosceles triangle may be used. Each light source 3 may have a polygonal shape or a circular shape.

  In the case of a square lattice-like arrangement, it is preferable that one axial direction of the square lattice (for example, A in FIG. 2A) coincides with the longitudinal direction of the substrate 2. 2A to 2C, there are three rows of light sources arranged in a straight line parallel to the axial direction, but the present invention is not limited to this.

  On the other hand, also in the case of a triangular lattice arrangement, it is preferable that one axis of the triangular lattice (for example, B in FIG. 2D) coincides with the longitudinal direction of the substrate 2. At this time, the light source arranged in a straight line along the longitudinal direction of the substrate 2 is relatively displaced in the direction of the axis B from the light source arranged in an adjacent straight line. Different from the array. In FIGS. 2D to 2F, there are three rows of light sources arranged in a straight line, but the present invention is not limited to this.

  Further, the arrangement of the red light source 3a, the green light source 3b, and the blue light source 3c in the substrate may form a region for each color as shown in FIG. On the other hand, the arrangement of the red light source 3a, the green light source 3b, and the blue light source 3c in the substrate includes a red light source 3a, a green light source 3b, and a blue light source 3c, as shown in FIGS. It is preferable that the light source group 4 is formed and these are regularly arranged on the substrate 2 of the plant cultivation light source 10 in a plan view. By regularly arranging the light source group 4 in plan view, the chromaticity distribution can be made uniform in the plane of the substrate 2. Here, in one light source group 4, the number ratio between the red light source 3a and the green light source 3b satisfies the relationship of 4: 3 to 2: 1, and the number ratio between the red light source 3a and the blue light source 3c is 2: 1. The relationship of ˜4: 1 is satisfied. In the example of FIG. 2, the light source group 4 is configured with three red light sources 3a, two green light sources 3b, and one blue light source 3c.

The light source group 4 may be provided along the long axis direction of the substrate 2 as shown in FIGS. 2B and 2D, or as shown in FIGS. 2C, 2E, and 2F. Alternatively, it may be formed along the width direction of the substrate 2. In order to make the luminance and chromaticity distribution in the substrate 2 most uniform, it is preferable that the light sources of the respective colors are arranged uniformly in the light source group 4.
For example, as shown in FIGS. 2B and 2E, when the light source groups 4 are provided in a row, it is preferable to arrange them in the order of RRGRGB along the length direction. Here, R means a red light source 3a, G means a green light source 3b, and B means a blue light source 3c. On the other hand, for example, as shown in FIGS. 2C, 2 </ b> E, and 2 </ b> F, when the light source group 4 is divided into two or more rows, a predetermined color is unevenly distributed in the light source group 4. Preferably not. For example, the arrangement as shown in FIG. However, in FIG. 2E as well, depending on how the light source group 4 is separated (the light source group 4 separated on the left side in the figure and the light source group 4 separated on the right side in the figure are considered), the light sources of the respective colors are distributed and arranged. be able to.

As mentioned above, although the specific example was shown about the case where the arrangement | sequence of each light source 3 and the light source group 4 is on a surface, the arrangement | sequence of the light source 3 and the light source group 4 in this invention is not limited to this.
Alternatively, the LED elements and the like may be regularly arranged using LED elements or the like in which each light source is housed in one package. For example, as one packaged LED element, an LED element accommodated so that a red LED chip, a green LED chip, and a blue LED chip satisfy a predetermined relationship can be used. Here, the predetermined relationship is that the number ratio of red LED chips: green LED chips is 4: 3 to 2: 1, and the number ratio of red LED chips: blue LED chips is 2: 1 to 4: 1. It means a relationship.

  Returning to FIG. 1, the plant cultivation light source 100 includes terminals 21 to 24 provided at an end portion of the main end portion 10. The terminals 21 to 24 are paired in two. By supplying power to a pair of terminal pairs, power can be supplied to each light source 3 connected to the terminal pair. The terminal pair may be connected by the method shown in FIG. 3A or may be connected by the method shown in FIG. In FIG. 3A, one of the two terminals provided at both ends of the main body 10 is connected to each other, and a voltage is applied between the terminals. In FIG. 3B, two terminals provided at one end of the main body 10 are connected to each other, and a voltage is applied between the terminals. In either case, the light source 3 is connected between the two connected terminals.

  At this time, the red light source 3a, the green light source 3b, and the blue light source 3c constituting the light source 3 may be connected to any of the two terminal pairs. However, from the viewpoint of growing plants, it is preferable that the red light source 3a and the blue light source 3c can be controlled independently. For this reason, the red light source 3a and the blue light source 3c are preferably connected to different terminal pairs. The remaining green light source 3b may be connected to any terminal pair.

  Here, the terminals 21 to 24 may have various cap shapes and are not particularly limited. For example, an L-type pin base (GX16t-5) which is an internal standard of the Japan Light Bulb Industry Association can be used.

  In the above description, an example in which two terminals are provided at one end is shown. The light source for plant cultivation in the shape of a straight tube fluorescent lamp with two terminals at one end has the same shape as the conventional straight tube fluorescent lamp, so the size of the tube and the specification of the base are the same as those of the conventional straight tube fluorescent lamp. It can be adapted to the standard. That is, it can be attached to an existing fluorescent lamp fixture. That is, the plant cultivation light source 100 can be installed at low cost with simple construction using existing facilities.

On the other hand, the present invention is not limited to the shape of a straight fluorescent lamp having two terminals at one end.
For example, three terminals may be provided for each end of the main body 10. 4A and 4B, the terminals 31 to 36 are provided in the main body 10, and there are three terminal pairs in which two terminals are paired. In this case, a red light source 3a, a green light source 3b, and a blue light source 3c can be separately connected to each terminal pair. In this way, by connecting the red light source 3a, the green light source 3b, and the blue light source 3c to different terminal pairs, the light sources of the respective colors can be controlled independently.

"Light source device for plant cultivation"
The light source device for plant cultivation includes the light source for plant cultivation described above and a power supply control device connected to the light source for plant cultivation. The power supply control device can turn on, turn off, and dimm the light source. The power supply control device may be provided inside the main body constituting the light source for plant cultivation (hereinafter referred to as “power supply control device built-in type”), or may be provided outside the main body (hereinafter referred to as “power supply control device built-in type”). , "Power supply control device external type"). Further, a configuration in which a part of the power supply control device is provided inside the main body (hereinafter referred to as “partial power supply control device built-in type”) may be used.

(External power controller)
First, the external power supply control type will be described. FIG. 5 shows an example of an external power source device for plant cultivation according to the present invention. Here, the main body 10 will be described based on the configuration of FIG. The configuration of the main body 10 is not limited to this configuration, and the different configurations described above can be used as appropriate. Hereinafter, a plurality of light sources connected to the terminal 21 and the terminal 22 are referred to as a first light source assembly 41, and a light source connected to the terminal 23 and the terminal 24 is referred to as a second light source assembly 42.

  A power supply control device 43 is connected to a pair of power supply terminals including the terminals 21 and 22. The power supply control device 43 includes a power supply circuit 43 a for converting an alternating voltage (AC) supplied from an alternating current power source into a direct voltage (DC), and a control circuit for controlling the light emission of the first light source assembly 41. 43b is provided. The light emission control elements here include at least the light amount (light emission intensity) and the light emission time of the first light source assembly 41. As the method of the control circuit 43b, a conventionally known method such as amplitude control, pulse width control (PWM), or phase control can be adopted.

  In addition, a power source control device 44 for turning on, turning off, and dimming the second light source assembly 42 is connected to the terminal pair including the terminals 23 and 24. Similarly to the power supply control device 43, the power supply control device 44 also includes a power supply circuit 44a and a control circuit 44b.

  The first light source assembly 41 and the second light source assembly 42 can be controlled independently by the respective power supply control devices 43 and 44b. From the viewpoint of growing plants, it is preferable to arrange the red light source 3 a in the first light source assembly 41 and the blue light source 3 c in the second light source assembly 42. The green light source 3b may be arranged in either the first light source assembly 41 or the second light source assembly 42.

  The control circuit 43b and the control circuit 44b may be provided with a timer circuit for controlling the power supply time, and the power supply to the first light source assembly 41 and the second light source assembly 42 may be changed at regular intervals.

  The plant cultivation light source 100 includes an input unit for setting the power supply time, current value, voltage value, and the like to the first light source assembly 41 or the second light source assembly 42 in the control circuits 43b and 44b, and set values. You may provide the display part etc. for confirming.

  Here, the description has been made based on the configuration of FIG. 3, but when three terminal pairs are configured as shown in FIG. 4A, for example, three power control devices can be connected to each terminal pair. For example, each of the three terminal pairs can be controlled independently by connecting a red light source 3a, a green light source 3b, and a blue light source 3c. For example, when using this plant cultivation light source 100 in a restaurant that performs store-and-store sales, all three primary colors are prepared, so that the color can be appropriately changed according to the mode.

(Built-in power control device)
FIG. 6 differs from the power supply control device external type in that the power supply control devices 43 and 44 are provided inside the main body 10. The configuration of the terminal pair in the main body 10 is the configuration shown in FIG. Other points are the same as those of the external power supply control type. Therefore, the description of the same configuration is omitted. A built-in power supply control device allows connection to an existing AC power supply.

(Part with built-in power control device)
FIG. 7 differs from the power supply control device external type in that the control circuits 43b and 44b are provided inside the main body 10 and the power supply circuits 43a and 44a are provided outside the power supply control devices 43 and 44. . The configuration of the terminal pair in the main body 10 is the configuration shown in FIG. The description of the same configuration as that of the external power control device is omitted. Since the light source can be controlled inside the main body 10, it can be connected to an existing power supply facility.

"Cultivation plant"
There are various types of plants that can be cultivated using the light source for plant cultivation according to the present invention. For example, vegetables, potatoes, fruits, beans, cereals, seeds, algae, ornamental plants, moss and the like can be cultivated.

  Leafy vegetables include lettuce, leek, mikuna, saladana, shungiku, parsley, honey bee, komatsuna, mustarded bean curd, mustard, wasabi, watercress, Chinese cabbage, horned beetle, cabbage, cabbage, cauliflower, broccoli, medicinal cabbage, onion, sprouts, garlic , Sea urchin, leek, asparagus, celery, spinach, seri, udo, myoga, buffalo, perilla, various herbs. Further, leaf vegetables such as Detroit, Lolo Rossa, Arugula, Pinot Green, Red Romaine, and Chicory, which are called “baby leaves” and are eaten mainly by young leaves, can also be mentioned.

The lettuce includes head-letter lettuce, non-head-letter lettuce and semi-head-letter lettuce. For example, leaf lettuce, frill lettuce, romaine, green wave, green leaf, red leaf, frill ice (registered trademark), river green ( (Registered trademark), ruffle leaf, fringe green, no chip, mocoretas, sanchu, chima sanchu.
Various herbs include, for example, basil, Italian parsley and the like.

  In addition, fruit vegetables such as tomato, melon, cucumber, strawberry, pumpkin, watermelon, eggplant, pepper, okra, sweet bean, broad bean, pea, shrimp, corn, radish, turnip, burdock, carrot, potato, taro, sweet potato, yam, Root vegetables such as ginger, wasabi and lotus root can also be cultivated.

Examples of fruit trees include mango, pineapple, figs, blueberries, raspberries, blackberries, boysenberries, grapes, leeks, cranberries, lotus cups, currants, red currants, papayas, passion fruits, dragon fruits and the like.
Examples of cereals include amaranth, millet, oat, barley, millet, wheat, rice, sticky rice, buckwheat, corn, pearl barley, barnyard grass and rye.

  Regardless of whether they are prokaryotes or eukaryotes, algae include protozoa such as green algae, brown algae, cyanobacteria, and red photosynthetic bacteria, and organisms with aqueous photosynthetic ability such as aquatic plants. . More specifically, it is a prokaryotic green algae, red algae, gray algae, crypto algae, dinoflagellates, golden algae, diatoms, yellow green algae, hapto algae, rafido algae (green whit algae), chloralacunion algae. , Euglena algae, Plasino algae, axle algae and the like.

  As seaweeds, macacomb, resilience, onikonbu, enacomb, honeycomb, nagacomb, chijimicomb, caraft trorocomb, gagaracomb, gagome, atsubasjicomb, necoa sorghum, goheikonbu, chigaiso, uganomok, samurai, arab It is possible to cultivate yabanemoku, sawtooth mushroom, isomoku, umitranoo, and also to cultivate seaweeds (Caulerpa lentillifera) belonging to the genus Iwazuta, so-called sea grapes.

  Examples of microalgae include algae belonging to Class Chlorophyceae and Class Trebouxiophyceae. For example, Botryococcus braunii for the green algae class, and Pseudochoricystis ellipsoidea for the Trevoxia algae class. Note that Botriococcus brownie and Pseudocollistis ellipsoidia are expected as biofuels because they produce heavy oil or light oil by photosynthesis.

The moss includes moss belonging to the Magoke class. For example, moss belonging to the genus Shimmofurigoceae (Grimmiales), which is so-called sand moss, such as Racomitrium japonicum.
In addition to roses, mini roses, gentian, etc., various ornamental plants can be cultivated as ornamental plants.

  According to the light source for plant cultivation and the light source device for plant cultivation according to the present invention, a plant can be efficiently cultivated and no unpleasant feeling is given to a person in the light source environment. Therefore, plants can be cultivated while exhibiting at a restaurant that sells stores. Moreover, the stress of the worker who works in a plant cultivation factory can be reduced.

  DESCRIPTION OF SYMBOLS 1 ... Rod, 2 ... Board | substrate, 3 ... Light source, 3a ... Red light source, 3b ... Green light source, 3c ... Blue light source, 4 ... Light source group, 10 ... Main-body part, 100 ... Light source for plant cultivation 21, 22, 23, 24, 31, 32, 33, 34, 35, 36 ... terminals, 41 ... first light source assembly, 42 ... second light source assembly, 43, 44 ... power supply control device, 43a, 44a ... power supply circuit, 43b, 44b ... Control circuit

Claims (8)

A substrate, and a plurality of light sources arranged on the substrate,
The light source has a red light source whose main wavelength to emit is red, a green light source whose main wavelength to emit is green, and a blue light source whose main wavelength to emit is blue,
The number ratio of the red light source and the green light source satisfies a relationship of 4: 3 to 2: 1, and the number ratio of the red light source and the blue light source satisfies a relationship of 2: 1 to 4: 1. A light source for plant cultivation.   The light source for plant cultivation according to claim 1, wherein the light sources are regularly arranged on the substrate in plan view. The substrate is rectangular;
The light source for plant cultivation according to claim 1, wherein the light sources are arranged in one or more rows along the longitudinal direction and / or the short direction of the rectangle. . The red light source, the green light source, and the blue light source form a light source group,
In the light source group, the number ratio of the red light source and the green light source satisfies a relationship of 4: 3 to 2: 1, and the number ratio of the red light source and the blue light source is 2: 1 to 4: 1. Meet relationships,
Furthermore, the said light source group is arranged regularly by planar view on the board | substrate, The light source for plant cultivation as described in any one of Claims 1-3 characterized by the above-mentioned. Further comprising two or more terminal pairs connected to the light source;
The light source for plant cultivation according to any one of claims 1 to 4, wherein the red light source, the green light source, and the blue light source are respectively connected to different terminal pairs. Further comprising two or more terminal pairs connected to the light source;
The red light source and the blue light source are connected to different terminal pairs,
The said green light source is connected to either of the said terminal pair, The light source for plant cultivation as described in any one of Claims 1-4 characterized by the above-mentioned.   The peak wavelength of the red light source is 650 nm to 670 nm, The plant cultivation light source according to any one of claims 1 to 6. A light source for plant cultivation according to any one of claims 1 to 7,
A plant cultivation light source device comprising: a power supply control device connected to a terminal of the plant cultivation light source.

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