JP3180774U - LED lamp for plant cultivation and LED lamp system for plant cultivation - Google Patents

Abstract

An object of the present invention is to provide a light source for plant cultivation that has an excellent effect of promoting growth, has high energy efficiency, and can be easily installed.
An LED lamp for plant cultivation having a straight tube fluorescent lamp shape, each of two or more kinds of LED elements having different emission wavelength ranges (n is an integer of 2 or more), n sets of terminal pairs, LED for plant cultivation in which LED elements in the same emission wavelength region are electrically connected in series and / or parallel to constitute an LED element group, and each of the terminal pairs is connected to the independent LED element group Provide a lamp.
[Selection] Figure 1

Description

  The present invention relates to an LED lamp for plant cultivation and an LED lamp system for plant cultivation. More specifically, the present invention relates to a straight fluorescent lamp type LED lamp for irradiating cultivated plants with red and blue illumination light.

  2. Description of the Related Art Conventionally, in plant cultivation, a technique for promoting seedlings by illuminating 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 illumination, for example, Patent Literature 1 discloses a plant illumination device configured to illuminate a plant alternately with green light and white light. This illuminating device constitutes a change of day and night by alternately illuminating with green light having a wavelength of 500 to 570 nm and white light having a wavelength of 300 to 800 nm, thereby facilitating plant translocation by facilitating the commutation action of the plant. is there.

  On the other hand, in recent years, LED lamps are rapidly spreading in place of fluorescent lamps. LED lamps have the advantages of lower power consumption and longer life than fluorescent lamps. In addition, when installing the LED lamp, it is possible to install the LED lamp as an LED lighting device by simply replacing the fluorescent lamp with the LED lamp using the existing fluorescent lamp fixture as it is. For example, Patent Document 2 discloses a straight tube fluorescent lamp type LED lamp which is set to a specified length corresponding to the wattage of a fluorescent tube and can be easily attached to an existing fluorescent lamp fixture by removing the fluorescent tube. Has been.

JP-A-6-276858 JP 2001-351402 A

  In order to improve productivity, a light source for plant cultivation that is excellent in growth promotion effect, energy efficient, and can be easily installed is desired. The main purpose of the present invention is to provide a light source for plant cultivation that satisfies these demands.

  The inventors of the present invention have made extensive studies on the effects of artificial light illumination on the growth of plants, and are very prominent under certain illumination conditions by illuminating with various illumination conditions of red light and blue light. Have found that it is possible to obtain a special effect, and have filed a patent application based on this knowledge (Japanese Patent Application No. 2012-070713).

Based on the above knowledge, the present invention is an LED lamp for plant cultivation having a straight tube fluorescent lamp shape, each having two or more types of LED elements having different emission wavelength ranges (n is an integer of 2 or more), a terminal N pairs are provided, LED elements in the same emission wavelength region are electrically connected in series and / or parallel to form an LED element group, and each of the terminal pairs is connected to the independent LED element group An LED lamp for plant cultivation is provided.
This LED lamp for plant cultivation preferably includes a red LED element and a blue LED element as the LED element.
When a red LED element and a blue LED element are used as the LED element, the specific arrangement configuration is not particularly limited, and examples thereof include the following (1) to (5) specific arrangement configurations.
(1) The LED elements are arranged in a square lattice shape in plan view on a rectangular substrate,
The direction of one axis of the square lattice coincides with the longitudinal direction of the substrate;
Each LED element group arranged linearly in the direction of the axis coinciding with the longitudinal direction of the substrate is composed of only red LED elements or only blue LED elements.
(2) The LED elements are arranged in a square lattice shape in plan view on a rectangular substrate,
The direction of one axis of the square lattice coincides with the longitudinal direction of the substrate;
Each LED element group arranged linearly in the direction of the axis that coincides with the longitudinal direction of the substrate has one or more red LED elements and one or more blue LED elements arranged alternately. The configuration.
(3) The red LED elements and the blue LED elements are arranged in a checkered pattern.
(4) The LED elements are arranged in a triangular lattice shape in plan view on a rectangular substrate;
The direction of one axis of the triangular lattice coincides with the longitudinal direction of the substrate;
Each LED element group arranged linearly in the direction of the axis coinciding with the longitudinal direction of the substrate is composed of only red LED elements or only blue LED elements.
(5) The LED elements are arranged in a triangular lattice pattern on a rectangular substrate in plan view,
The direction of one axis of the triangular lattice coincides with the longitudinal direction of the substrate,
Each LED element group arranged linearly in the direction of the axis that coincides with the longitudinal direction of the substrate has one or more red LED elements and one or more blue LED elements arranged alternately. The configuration.

  The LED lamp for plant cultivation according to the present invention is configured as an LED lamp system for plant cultivation by independently connecting a power control device for turning on, turning off, and dimming the LED element group to the terminal pair. be able to.

  Moreover, the LED lamp for plant cultivation according to the present invention may have a built-in power control circuit for turning on, turning off, dimming, etc. the LED element group. In this case, each of the terminal pairs The LED element group is connected via an independent power supply control circuit.

  In the present invention, red light means light having a peak wavelength of 570 to 730 nm, and blue light means light having a peak wavelength of 400 to 515 nm.

  In the present invention, the “straight tube fluorescent lamp” refers to a conventional straight tube fluorescent lamp, and more specifically, JISC7617-2 “Straight tube fluorescent lamp—Part 2: Performance specification” 2.3.1 “ The straight tube fluorescent lamp specified in “List of data sheets” shall be used.

  In the present invention, the “plant” includes at least leafy vegetables, fruit trees and cereals, and algae and moss are also widely included.

  The present invention provides a light source for plant cultivation that is excellent in growth promotion effect, energy efficient, and can be easily installed.

It is a figure explaining the structure of the LED lamp for plant cultivation based on this invention. It is a figure explaining the method of electrical connection of an LED element. It is a figure explaining the state of the arrangement | sequence of the LED element on a board | substrate. It is a figure explaining the connection system of the coupling terminal pair of the LED lamp for plant cultivation, and an LED element part. It is a figure explaining the LED lamp system (connection method A) of a plant cultivation of a power supply control circuit external attachment type. It is a figure explaining the modification (connection system B) of the connection system of the LED lamp system for plant cultivation of an external power supply control type. It is a figure explaining the LED lamp system (connection method A) for plant cultivation of a power supply control circuit built-in type. It is a figure explaining the modification (connection system B) of the connection system of the LED lamp for plant cultivation with a built-in power supply control circuit. It is a figure explaining the LED lamp system (connection method A) for plant cultivation of a part built-in power control circuit. It is a figure explaining the modification (connection method B) of the connection system of the LED lamp system for plant cultivation of a power supply control circuit part built-in type.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. 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.

1. FIG. 1 is a diagram illustrating a configuration of a plant cultivation LED lamp according to the present invention. The LED lamp for plant cultivation includes the main body 1 and terminals 41 to 44 provided at the end of the main body 1.

[Main unit]
The main body 1 has a straight fluorescent lamp shape. The main body 1 is a transparent or translucent plastic or glass cylindrical tube similar to a conventional straight tube fluorescent lamp. The size of the tube does not necessarily have to be the same as the standard size of the conventional straight tube fluorescent lamp. The tube may be made of a single material. For example, the half on the radiation direction side (lower side) of the light from the LED element is made of plastic such as polycarbonate, and the upper half is made of metal such as aluminum. It may be a combination of different materials such as making.

[LED element]
Inside the main body 1, a rectangular substrate 11 in which two or more red LED elements 2 and blue LED elements 3 are arranged is provided. The red LED element 2 and the blue LED element 3 on the substrate 11 form two electrically independent LED element groups (red LED element group and blue LED element group).

  Here, the red LED element group and the blue LED element group are obtained by electrically connecting LED elements of respective colors in series (FIG. 2 (a)) or in parallel (FIG. 2 (b)), Alternatively, it may be a combination of electrical connection in series and parallel connection (FIGS. 2C and 2D).

Regardless of the electrical connection method described above, the red LED element 2 and the blue LED element 3 on the substrate 11 can adopt various arrangement modes.
Since the main body 1 has a straight tube fluorescent lamp shape, the substrate 11 is preferably rectangular. The arrangement of the red LED elements 2 and the blue LED elements 3 on the substrate 11 may be linear along the longitudinal direction of the substrate 11 or may be planar.

  When the arrangement of the LED elements is linear, it is preferable that one or more red LED elements 2 and one or more blue elements LED3 are alternately arranged in a line. By adopting such an arrangement, when only the red LED element 2 or only the blue element LED3 is caused to emit light, the luminance distribution in the longitudinal direction of the LED lamp becomes uniform.

  When the arrangement of the LED elements is planar, a regular arrangement is preferable, whereby the luminance distribution becomes uniform in the plane of the substrate 11. Specific examples of the regular arrangement include a square lattice arrangement shown in FIGS. 3A to 3F, FIG. 3M, and FIG. Examples of the triangular lattice arrangement shown in FIG. Here, the square of the unit lattice of the square lattice does not necessarily need to be a square. Further, a triangle that is a unit cell of a triangular lattice does not necessarily need to be a regular triangle. In either case, the shape of the unit cell may be such that the LED elements are uniformly arranged on the substrate, for example, a rectangle, a parallelogram, or an isosceles triangle.

  In the case of a square lattice arrangement, it is preferable that one axial direction of the square lattice (for example, A in FIG. 3A) coincides with the longitudinal direction of the substrate. When the LED element group arranged linearly along the direction of the axis A is taken as one unit, the unit of the linear LED element group is preferably repeated in the width direction of the substrate. 3 (a) to 3 (f), (m), and (n), there are three rows of the linear LED element groups. .

  Each LED element group arranged in a straight line along the direction of the axis A in a square lattice arrangement is composed of only the red LED element 2 or the blue LED element 3 as shown in FIG. Also good. In FIG. 3A, the three rows of linear LED element groups are each composed of a red LED element 2, a blue LED element 3, and a red LED element 2. In addition, the linear LED element group of 3 rows is not limited in said case, You may be comprised from the blue LED element 3, the red LED element 2, and the blue LED element 3, respectively. Such a configuration facilitates electrical connection between the red LED elements 2 and between the blue LED elements 3. Moreover, it is preferable that the LED element group consisting of the red LED elements 2 and the LED element group consisting of the blue LED elements 3 are alternately arranged in the width direction of the substrate. With such a configuration, the luminance distribution becomes uniform.

  In addition, each LED element group arranged in a straight line along the direction of the axis A in a square lattice array alternately includes one or a plurality of red LED elements 2 and one or a plurality of blue LED elements 3. An arrangement may be used. FIGS. 3B and 3D show a case where the linear LED element group has a configuration in which one red LED element 2 and one blue LED element 3 are alternately arranged. 3C and 3E show a case where the linear LED element group has a configuration in which two red LED elements 2 and one blue LED element 3 are alternately arranged. Although not shown, the linear LED element group may have a configuration in which one red LED element 2 and two blue LED elements 3 are alternately arranged, or a linear LED element. The group may have a configuration in which two red LED elements 2 and two blue LED elements 3 are alternately arranged. Furthermore, a configuration in which three or more LED elements of one emission color and one LED element of the other emission color are alternately arranged may be employed. FIG. 3F shows a case where the linear LED element group has a configuration in which three red LED elements 2 and one blue LED element 3 are alternately arranged. With such a configuration, the luminance distribution becomes uniform. In particular, as shown in FIG. 3D, when the red LED elements 2 and the blue LED elements 3 are arranged in a checkered pattern, the luminance distribution becomes more uniform, which is more preferable.

  On the other hand, also in the case of a triangular lattice arrangement, it is preferable that one axial direction of the triangular lattice (for example, B in FIG. 3G) coincides with the longitudinal direction of the substrate. When the LED element group arranged linearly along the direction of the axis B is taken as one unit, it is preferable that the unit of the linear LED element group is repeated in the width direction of the substrate. However, it differs from the case of a square lattice in that the position of each LED element in the adjacent linear LED element group is relatively displaced in the direction of the axis B. 3 (g) to (l), this linear LED element group has three rows, but is not limited to this, and may be two or more rows.

  Each LED element group arranged in a straight line along the direction of the axis A in the triangular lattice arrangement is composed of only the red LED elements 2 or only the blue LED elements 3 as shown in FIG. May be. In FIG. 3 (g), the three rows of linear LED element groups are each composed of a red LED element 2, a blue LED element 3, and a red LED element 2. Such a configuration facilitates electrical connection between the red LED elements 2 and between the blue LED elements 3. Moreover, it is preferable that the LED element group consisting of the red LED elements 2 and the LED element group consisting of the blue LED elements 3 are alternately arranged in the width direction of the substrate. With such a configuration, the luminance distribution becomes uniform.

  In addition, each LED element group arranged in a straight line along the direction of the axis B in the triangular lattice arrangement also has one or more red LED elements 2 and one or more blue LED elements 3 alternately. The configuration may be arranged in the following manner. 3 (h) and 3 (j) show a case where the linear LED element group has a configuration in which one red LED element 2 and one blue LED element 3 are alternately arranged. 3 (i), (k), and (l) show a case where the linear LED element group has a configuration in which two red LED elements 2 and one blue LED element 3 are alternately arranged. . Although not shown, the linear LED element group may have a configuration in which one red LED element 2 and two blue LED elements 3 are alternately arranged, or a linear LED element. The group may have a configuration in which two red LED elements 2 and two blue LED elements 3 are alternately arranged. Further, as in the case of the square lattice arrangement, a configuration in which three or more LED elements of one emission color and one LED element of the other emission color are alternately arranged may be used. With such a configuration, the luminance distribution becomes uniform.

  As mentioned above, although the specific example was shown about the case where the arrangement | sequence of an LED element is planar, the arrangement | sequence of the LED element in this invention is not limited to this. For example, in a square lattice arrangement or a triangular lattice arrangement, all of the plurality of LED element groups arranged linearly along the direction of the axis A or the axis B are one or a plurality of red LED elements 2. It is not necessary to have a configuration in which one or a plurality of blue LED elements 3 are alternately arranged. As shown in FIG. 3 (m) and FIG. 3 (n), a part of the plurality of LED element groups arranged in a straight line along the direction of the axis A or the axis B is alternately a red LED element and a blue LED element. It is the structure which was arranged, and the remainder may be comprised only with the LED element of one luminescent color. That is, it is only necessary that the light emitting LED elements having a small number are arranged so as to be distributed substantially uniformly in the longitudinal direction of the substrate.

  The above-described LED element arrangement is such that the red LED element 2 and the blue LED element 3 are arranged. The LED element in which the red LED chip and the blue LED chip are accommodated in one package is the length of the substrate 11. They may be arranged linearly along the direction, or arranged in a plane. As such an LED element, a 2-in-1 type element in which one red LED chip and one blue LED chip are accommodated in one package, two red LED chips and one in one package A 3-in-1 type element in which a blue LED chip is housed can be used.

  As the red LED element 2, an element that emits light having a peak wavelength of 570 to 730 nm, preferably light having a peak wavelength of 635 to 660 nm is used. For the blue LED element 3, an element that emits light having a peak wavelength of 400 to 515 nm, preferably light having a peak wavelength of 400 to 460 nm is preferably used.

  As an LED that emits light in the above wavelength range, for example, a red LED includes an aluminum / gallium / indium / phosphorus light emitting diode (gallium / phosphorous substrate, sold by Showa Denko KK as product number HRP-350F). The red LED includes a light emitting diode having a product number GM2LR450G.

  The LED element is small, has a long life, and emits light at a specific wavelength depending on the material, so that there is no unnecessary heat radiation, so that it has good energy efficiency and does not cause troubles such as burning of a leaf even when irradiated close to a plant. For this reason, it becomes possible by using an LED element for a light source to cultivate at low power cost and space saving compared with other light sources.

[Feed terminal pair]
In the LED lamp for plant cultivation, two power supply terminal pairs are constituted by four terminals 41 to 44. The two power supply terminal pairs are connected to either the red LED element group or the blue LED element group, respectively. A specific connection method between the power supply terminal pair and the LED element group is shown in FIG. In FIG. A, a power supply terminal pair including terminals 41 and 42 is connected to the red LED element group 21, and a power supply terminal pair including terminals 43 and 44 is connected to the blue LED element group 31. A connection method in which a voltage is applied between the terminals of each of the two pins provided at both ends is referred to as “connection method A” (the polarity of the LED may be opposite to that in FIG. A). . In FIG. B, a pair of power supply terminals including terminals 41 and 43 is connected to the red LED element group 21, and a pair of power supply terminals including terminals 42 and 44 is connected to the blue LED element group 31. A connection method in which a voltage is applied between the two-pin terminals provided on one end of the one side is hereinafter referred to as “connection method B” (the polarity of the LED may be opposite to that in FIG. B).

  The terminals 41 to 44 may have various cap shapes and are not particularly limited. For example, an L-type pin cap (GX16t-5) which is an internal standard of the Japan Light Bulb Industry Association can be used.

2. LED lamp system for plant cultivation [External power control circuit type]
[Connection method A]
In FIG. 5, the structure of the LED lamp system for plant cultivation which concerns on 1st embodiment is shown. The figure shows an LED lamp system for plant cultivation of “external power control circuit type” in which a power supply control device for turning on, turning off, dimming, etc. an LED element group is connected to the LED lamp main body 1 externally. ing.

  In the LED lamp system shown in FIG. 5, a power supply terminal pair including terminals 41 and 42 is connected to the power supply control device 22 of the red LED element group 21, and a power supply terminal pair including terminals 43 and 44 is connected to the blue LED element group 31. The LED lamp system of the connection system A connected to the power supply control apparatus 32 was shown.

  A power supply control device 22 for turning on, turning off, and dimming the red LED element group 21 is connected to a pair of power supply terminals including terminals 41 and 42. The power supply control device 22 includes a power supply circuit 22a for converting an AC voltage (AC) supplied from an AC power supply into a DC voltage (DC), and a control circuit for controlling the light emission of the red LED element group 21. 22b is provided. The light emission control elements here include at least the light amount (light emission intensity) and the light emission time of the LED element group. As the method of the control circuit 22b, a conventionally known method such as amplitude control, pulse width control (PWM), or phase control can be adopted.

  In addition, a power supply control device 32 for turning on, turning off, dimming, etc. the blue LED element group 31 is connected to a pair of power supply terminals composed of terminals 43 and 44. Similarly to the power supply control device 22, the power supply control device 32 also includes a power supply circuit 32a and a control circuit 32b.

  In the LED lamp system for plant cultivation according to the present embodiment, the red LED element 2 and the blue LED are connected by the power control device 22 connected to the red LED element group 21 and the power control device 32 connected to the blue LED element group 31. The lighting, extinguishing, and dimming of the element 3 can be controlled independently.

  The control circuits 22b and 32b are preferably provided with a timer circuit for controlling the power supply time so that the power supply to the red LED element group 21 and the blue LED element group 31 is changed at regular intervals. The timer circuit can be constituted by a commonly used one-chip microcomputer.

  The power supply control device 22 and the power supply control device 32 include an input unit for setting a power supply time, a current value, a voltage value, and the like to the red LED element group 21 or the blue LED element group 31 in the control circuits 22b and 32b. You may provide the display part etc. for confirming a value. As the configuration of the input unit, an analog signal conversion switch using a variable resistor, digital input using a push button, an infrared receiving unit combined with an infrared remote controller, and the like can be employed. The display unit may be an analog or digital display, an LED indicator, or the like. Each power supply control device can be collectively controlled by wire or wireless.

  Since the LED lamp for plant cultivation according to the present embodiment has the shape of the main body 1 as a conventional straight tube fluorescent lamp shape, the size of the tube and the specification of the base are matched with the standard of the conventional straight tube fluorescent lamp. Thus, it can be attached to an existing fluorescent lamp fixture in place of a conventional straight tube fluorescent lamp. In such a case, according to the LED lamp for plant cultivation according to the present embodiment, the LED lamp system for plant cultivation can be constructed at low cost by simple construction using the existing fluorescent lamp apparatus as it is.

[Connection method B]
In FIG. 5, the connection method A LED lamp system in which a voltage is applied between the terminals of each pin at both ends of the LED lamp for plant cultivation is illustrated. A lamp system (see FIG. 6) can also be employed. Here, the configuration of the LED lamp 1 is the same as FIG. 4B. The power supply control device shown in FIG. 6 has a power supply circuit and a control circuit provided therein as in the case of the connection method A.

[Built-in power control circuit]
[Connection method A]
In FIG. 7, the structure of the LED lamp system for plant cultivation which concerns on 2nd embodiment is shown. The figure shows a “power control circuit built-in type” LED lamp system for plant cultivation in which a power control circuit for lighting, extinguishing, dimming, etc. the LED element group is built in the LED lamp main body 1.

  In the LED lamp system shown in FIG. 7, a pair of power supply terminals including terminals 41 and 42 is connected to the power control circuit of the red LED element group 21 in the LED lamp main body 1, and a pair of power supply terminals including terminals 43 and 44 is provided. The LED lamp system of the connection system A connected to the power supply control circuit of the blue LED element group 31 in the LED lamp main body 1 is shown.

  A pair of power supply terminals including terminals 41 and 42 includes a power supply circuit 22a for converting an AC voltage (AC) supplied from an AC power source into a DC voltage (DC) in the LED lamp main body 1, and a red LED element group. 21 is connected to the red LED element group 21 via a power supply control circuit including a control circuit 22b for controlling the light emission of 21. The method of the control circuit 22b can be as described above.

  Similarly, a pair of power supply terminals including terminals 43 and 44 is also connected to the blue LED element group 31 via a power supply control circuit including a power supply circuit 32a and a control circuit 32b.

  In the LED lamp for plant cultivation according to the present embodiment, the red LED element 2 and the blue LED element 3 are constituted by the control circuit 22b connected to the red LED element group 21 and the control circuit 32b connected to the blue LED element group 31. Can be controlled independently of lighting, extinction, and dimming.

  The control circuit 22b and the control circuit 32b are preferably provided with a timer circuit for controlling the power supply time so that the power supply to the red LED element group 21 and the blue LED element group 31 is changed at regular intervals.

  For the LED lamp for plant cultivation, the input unit for setting the power supply time, the current value, the voltage value, etc. to the red LED element group 21 or the blue LED element group 31 in the control circuits 22b and 32b, and the set value are confirmed. A display unit or the like may be provided. The configuration of the input unit and the display unit can be as described above.

  Since the LED lamp for plant cultivation according to the present embodiment has a built-in power supply control circuit, it can be connected to an existing AC power supply. In addition, since the shape of the main body 1 is a conventional straight tube fluorescent lamp shape, the conventional straight tube fluorescent lamp can be obtained by adjusting the size of the tube and the specifications of the base to the standard of the conventional straight tube fluorescent lamp. It can be attached to existing fluorescent lamp fixtures instead of. In such a case, according to the LED lamp for plant cultivation according to the present embodiment, the LED lamp system for plant cultivation is reduced in cost by simple construction using the existing fluorescent lamp apparatus and the existing AC power source as they are. Can be built.

[Connection method B]
In FIG. 7, the connection method A LED lamp system in which a voltage is applied between the terminals of two pins on one side of the LED lamp for plant cultivation is illustrated. A lamp system (see FIG. 8) can also be employed.

[Power control circuit partly built-in type]
[Connection method A]
In FIG. 9, the structure of the LED lamp system for plant cultivation which concerns on 3rd embodiment is shown. In the figure, a control circuit for turning on, turning off, dimming, etc. the LED element group is built in the LED lamp body 1 and a power circuit is externally connected to the LED lamp body 1 2 shows a “built-in” LED lamp system for plant cultivation.

  In the LED lamp shown in FIG. 9, a pair of power supply terminals composed of terminals 41 and 42 are connected to the control circuit 22b of the red LED element group 21 in the LED lamp main body 1 and connected to the power supply circuit 22a externally. , 44 is connected to the control circuit 32b of the blue LED element group 31 in the LED lamp main body 1 and externally connected to the power supply circuit 32a.

  A power supply device 22 having a built-in power supply circuit 22a for converting an AC voltage (AC) supplied from an AC power source into a DC voltage (DC) is connected to a pair of power supply terminals including terminals 41 and 42. A pair of power supply terminals composed of terminals 41 and 42 is connected to the red LED element group 21 via a control circuit 22b for controlling the light emission of the red LED element group 21 inside the LED lamp main body 1. . The method of the control circuit 22b can be as described above.

  A power supply device 32 having a built-in power supply circuit 32a is connected to a pair of power supply terminals composed of terminals 43 and 44. A pair of power supply terminals composed of the terminals 43 and 44 is connected to the blue LED element group 31 via the control circuit 32b.

  In the LED lamp for plant cultivation according to the present embodiment, the red LED element 2 and the blue LED element 3 are constituted by the control circuit 22b connected to the red LED element group 21 and the control circuit 32b connected to the blue LED element group 31. Can be controlled independently of lighting, extinction, and dimming.

  The control circuit 22b and the control circuit 32b are preferably provided with a timer circuit for controlling the power supply time so that the power supply to the red LED element group 21 and the blue LED element group 31 is changed at regular intervals.

  For the LED lamp for plant cultivation, the input unit for setting the power supply time, the current value, the voltage value, etc. to the red LED element group 21 or the blue LED element group 31 in the control circuits 22b and 32b, and the set value are confirmed. A display unit or the like may be provided. The configuration of the input unit and the display unit can be as described above.

  Since the LED lamp for plant cultivation according to the present embodiment has the shape of the main body 1 as a conventional straight tube fluorescent lamp shape, the size of the tube and the specification of the base are matched with the standard of the conventional straight tube fluorescent lamp. Thus, it can be attached to an existing fluorescent lamp fixture in place of a conventional straight tube fluorescent lamp. In such a case, according to the LED lamp for plant cultivation according to the present embodiment, the LED lamp system for plant cultivation can be constructed at low cost by simple construction using the existing fluorescent lamp apparatus as it is.

[Connection method B]
FIG. 9 illustrates the connection method A LED lamp system in which a voltage is applied between the terminals of each pin of the both ends of the LED lamp for plant cultivation, but the connection method B LED in which a voltage is applied between the terminals of two pins on one side. A lamp system (see FIG. 10) can also be employed. In addition, the power supply device of FIG. 10 has a power supply circuit provided therein as described above.

  In the plant cultivation LED lamp according to each of the embodiments described above, the configuration in which the two color light emitting element groups of the red LED element group and the blue LED element group are independently connected by the two terminal pairs has been described. The LED lamp for plant cultivation according to the present invention only needs to have two or more kinds of LED elements having different emission wavelength ranges (n is an integer of 2 or more) and n sets of terminal pairs. Three or more colors and three or more terminal pairs may be used. Also in this case, each terminal pair is connected to any one of the LED element groups. Moreover, when a power supply circuit, a control circuit, etc. are built in the LED lamp for plant cultivation, the same number of power supply circuits, control circuits, etc. are prepared as the number of colors of LED element groups, and it is connected to each LED element group.

3. Cultivated plants Cultivated plants targeted by the present invention are not particularly limited, and include vegetables, potatoes, mushrooms, fruits, beans, cereals, seeds, algae, moss, ornamental plants, etc. it can. Moreover, the cultivation form of these plants is not particularly limited, and may be hydroponics, soil cultivation, or the like. About algae, culture forms, such as a liquid culture medium and an agar culture medium, may be arbitrary.

[Leaf vegetables]
Leafy vegetables include lettuce, leek, mizuna, saladana, shungiku, parsley, honey bee, komatsuna, mustard mizuna, mustard, wasabi, watercress, Chinese cabbage, tsukena, chingensai, cabbage, cauliflower, broccoli, medicinal cabbage, onion, garlic, radish, Examples include leek, asparagus, celery, spinach, seri, udo, myoga, buffalo, perilla and 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.

[Fruit trees]
Examples of fruit trees include mango, pineapple, figs, blueberries, raspberries, blackberries, boysenberries, grapes, leeks, cranberries, lotus cups, currants, red currants, papayas, passion fruits and dragon fruits.

[Cereals]
Examples of cereals include amaranth, millet, oat, barley, millet, wheat, rice, sticky rice, buckwheat, corn, pearl barley, barnyard grass and rye.

[Algae]
Regardless of whether they are prokaryotes or eukaryotes, algae include protozoa such as green algae, brown algae, cyanobacteria, and red photosynthetic bacteria, and aquatic organisms such as aquatic plants . Specific examples of algae include cyanobacteria, prokaryotic green algae, red algae, gray algae, crypto algae, dinoflagellate algae, golden algae, diatoms, brown algae, yellow green algae, hapto algae, rafido algae (green algae) Chloracarnion algae, Euglena algae, prasino algae, green algae, axle algae and the like.

[Moss, etc.]
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 plant cultivation LED lamp and the plant cultivation LED lamp system according to the present invention, the existing fluorescent lamp apparatus and the existing commercial power source are used as they are, and the red light and the blue light are produced by relatively simple construction. Independently controlled irradiation can be performed. Therefore, this LED lamp for plant cultivation, etc. promotes plant growth by irradiating red light illumination light and blue light illumination light independently in plant factories such as leaf vegetables, fruits and cereals. Can be suitably used to increase the number of times of harvesting and the amount of harvesting.

1: body part, 11: substrate, 2: red LED element, 21: red LED element group,
22, 32: Power supply control device (power supply device), 22a, 32a: Power supply circuit, 22b, 32b: Control circuit, 3: Blue LED element, 31: Blue LED element group, 41-44: Terminal

Claims (9)

An LED lamp for plant cultivation having a straight tube fluorescent lamp shape,
N types (n is an integer of 2 or more) of LED elements having different emission wavelength ranges, each having two or more LED elements, n pairs of terminals,
LED elements in the same emission wavelength region are electrically connected in series and / or in parallel to constitute an LED element group,
An LED lamp for plant cultivation in which each of the terminal pair is connected to the independent LED element group.   The LED lamp for plant cultivation of Claim 1 provided with a red LED element and a blue LED element as said LED element. The LED elements are arranged in a square lattice shape in plan view on a rectangular substrate,
The direction of one axis of the square lattice coincides with the longitudinal direction of the substrate;
3. The plant cultivation according to claim 2, wherein each LED element group arranged linearly in the direction of an axis that coincides with the longitudinal direction of the substrate is composed of only a red LED element or only a blue LED element. LED lamp. The LED elements are arranged in a square lattice shape in plan view on a rectangular substrate,
The direction of one axis of the square lattice coincides with the longitudinal direction of the substrate;
Each LED element group arranged linearly in the direction of the axis that coincides with the longitudinal direction of the substrate has one or more red LED elements and one or more blue LED elements arranged alternately. The LED lamp for plant cultivation according to claim 2, which has a configuration.   The LED lamp for plant cultivation according to claim 2, wherein the red LED elements and the blue LED elements are arranged in a checkered pattern. The LED elements are arranged in a triangular lattice shape in plan view on a rectangular substrate,
The direction of one axis of the triangular lattice coincides with the longitudinal direction of the substrate;
3. The plant cultivation according to claim 2, wherein each LED element group arranged linearly in the direction of an axis that coincides with the longitudinal direction of the substrate is composed of only a red LED element or only a blue LED element. LED lamp. The LED elements are arranged in a triangular lattice shape in plan view on a rectangular substrate,
The direction of one axis of the triangular lattice coincides with the longitudinal direction of the substrate,
Each LED element group arranged linearly in the direction of the axis that coincides with the longitudinal direction of the substrate has one or more red LED elements and one or more blue LED elements arranged alternately. The LED lamp for plant cultivation according to claim 2, which has a configuration. An LED lamp for plant cultivation according to any one of claims 1 to 7,
A power control device independently connected to each of the terminal pairs;
LED lamp system for plant cultivation consisting of n power supply control circuits,
The LED lamp for plant cultivation according to any one of claims 1 to 7, wherein each of the terminal pairs is connected to the LED element group via an independent one of the n power control circuits. .

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