JP7404769B2 - LED lighting sheet assembly for animal and plant growing shelves, animal and plant growing shelves, and animal and plant growing factories - Google Patents

Description

The present disclosure relates to an LED lighting sheet assembly for an animal and plant growing rack, an animal and plant growing rack, and an animal and plant growing factory.

BACKGROUND ART In recent years, there has been an increasing demand for lighting devices that use LEDs as light sources, which consume less power, in place of conventional fluorescent lamps, high-pressure sodium lamps, and the like, as lighting devices used in animal and plant breeding factories.

As an example of an animal and plant growing factory that uses a lighting device that uses LEDs as a light source, there is a known plant growing device in which a plurality of straight-tube plant growing lights that use LEDs as a light source are arranged on the shelves of a plant growing shelf. (For example, see Patent Document 1).

An LED lighting device for growing animals and plants in which a plurality of LED chips are arranged on a flexible circuit board to form a planar light source has also been proposed (see, for example, Patent Document 2).

Japanese Patent Application Publication No. 2008-118957 JP2013-251230A

The present disclosure provides an LED lighting sheet assembly for an animal and plant growing rack, an animal and plant growing rack, and an animal and plant growing factory that can obtain a good yield of plants and animals.

The LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment includes a support, a first LED lighting sheet for growing animals and plants, and a second LED lighting sheet for growing animals and plants, which are attached to the support and are arranged adjacent to each other. and an LED lighting sheet for growing animals and plants, wherein the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are each arranged in multiple rows along the first arrangement direction. and a plurality of LED chips arranged in multiple stages along a second arrangement direction perpendicular to the first arrangement direction, arranged in one stage of the first LED lighting sheet for growing animals and plants, The LED chip located closest to the second LED lighting sheet for growing animals and plants in the first arrangement direction is defined as a first LED chip, and the LED chip is arranged on the first stage of the first LED lighting sheet for growing animals and plants. , the LED chip closest to the first LED chip is a second LED chip, and among the plurality of LED chips of the second LED lighting sheet for growing animals and plants, the first LED chip of the first LED lighting sheet for growing animals and plants is the second LED chip. The LED chip closest to the first LED chip was defined as the third LED chip, the distance between the first LED chip and the second LED chip was defined as A1, and the distance between the first LED chip and the third LED chip was defined as B1. Then, the relationship 0.5×A1≦B1≦1.5×A1 is satisfied.

In the LED lighting sheet assembly for a growing rack for animals and plants according to the present embodiment, an LED chip disposed on the same stage as the third LED chip and closest to the third LED chip is defined as a fourth LED chip, and the third LED chip When the distance between the LED chip and the fourth LED chip is A2, the following relationship may be further satisfied: 0.5×A2≦B1≦1.5×A2.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the LED chips of the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are respectively Ten or more LED chips may be arranged in series along the first arrangement direction, and four or more stages of the LED chips may be arranged in parallel along the second arrangement direction.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the LED chips of the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are each protected by transparent protection. It may be covered with a membrane.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants each include a substrate film and the substrate. A metal wiring part formed on the surface of the film may be provided, and the plurality of LED chips may be mounted on the metal wiring part.

In the LED lighting sheet assembly for growing shelves for animals and plants according to the present embodiment, the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants each have a thickness at the thickest portion. It may be 5 mm or less.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants include the first LED lighting sheet for growing animals and plants. A control section for supplying power to the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants is electrically connected, and the control section supplies power to the first LED lighting sheet for growing animals and plants and It may be externally connected to the second LED lighting sheet for growing animals and plants.

In the LED lighting sheet assembly for an animal and plant growing shelf according to the present embodiment, a constant voltage is applied from the control unit to the first animal and plant growing LED lighting sheet and the second animal and plant growing LED lighting sheet. may be done.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the control unit controls the LED chips of the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants. It may be possible to control the dimming of the light.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are each attached to the support body by a rivet. It may be attached.

In the LED lighting sheet assembly for a shelf for growing animals and plants according to the present embodiment, the support body includes a first support body to which the first LED lighting sheet for growing animals and plants is attached, and a second support body for growing animals and plants. and a second support body to which the LED lighting sheet is attached.

The animal and plant growing shelf according to the present embodiment is an animal and plant growing shelf, and includes a support and an LED lighting sheet assembly for the animal and plant grow shelf according to the present embodiment, which is attached to the support. .

In the animal and plant growing rack according to the present embodiment, an LED lighting sheet for growing animals and plants may be further arranged on a side surface of the LED lighting sheet assembly.

The plant and animal breeding factory according to the present embodiment includes a building and the shelf for growing the plants and animals according to the present embodiment, which is arranged inside the building.

According to this embodiment, animals and plants can be obtained in good yield.

FIG. 1 is a schematic diagram illustrating an LED lighting module according to one embodiment. FIG. 2 is a plan view showing an LED lighting sheet according to one embodiment. FIGS. 3(a) and 3(b) are plan views showing modified examples of the LED lighting sheet. FIG. 4(a) is a graph showing the relationship between time and voltage when a constant voltage is applied to the LED lighting sheet from the control unit, and FIG. 4(b) is a graph showing the relationship between time and voltage when a constant voltage is applied to the LED lighting sheet as a comparative example. 2 is a graph showing the relationship between time and voltage when FIG. 5 is a cross-sectional view (cross-sectional view taken along the line VV in FIG. 2) showing an LED lighting sheet according to one embodiment. FIGS. 6(a) to 6(h) are cross-sectional views showing a method of manufacturing an LED lighting sheet according to an embodiment. FIG. 7 is a schematic perspective view showing a plant growing factory according to one embodiment. FIG. 8 is a schematic perspective view showing a plant growing shelf according to one embodiment. FIG. 9A is a bottom view of a shelf board for a plant growing shelf according to one embodiment. FIG. 9B is a bottom view of a shelf board for a plant growing shelf according to one embodiment. FIG. 10A is a bottom view showing a modified example of a shelf board for a plant growing shelf according to an embodiment. FIG. 10B is a bottom view showing a modified example of a shelf board for a plant growing shelf according to an embodiment. FIGS. 11A(a) and 11(b) are diagrams showing modified examples of plant growing shelves. FIG. 11B is a diagram showing a modification of the plant growing shelf. FIG. 12(a) is a perspective view showing a shelf board for a plant growing shelf of a comparative example, and FIG. 12(b) is a bottom view showing a shelf board for a plant growing shelf of a comparative example. FIGS. 13(a) to 13(f) are diagrams showing the distribution of illuminance in Example 1. FIGS. 14(a) to 14(f) are diagrams showing the distribution of illuminance in Example 2. FIGS. 15(a) to 15(f) are diagrams showing the distribution of illuminance in the comparative example.

The LED lighting sheet assembly for a growing shelf for animals and plants according to the present embodiment includes a support, and a first LED lighting sheet and a second LED lighting sheet attached to the support and arranged adjacent to each other, The first LED lighting sheet and the second LED lighting sheet are each arranged in multiple rows along a first arrangement direction, and are arranged in multiple stages along a second arrangement direction perpendicular to the first arrangement direction. This is an LED lighting sheet for growing animals and plants that has LED chips. An LED chip arranged in one stage of the first LED lighting sheet and located closest to the second LED lighting sheet in the first arrangement direction is defined as a first LED chip, and arranged in the first stage of the first LED lighting sheet. The LED chip closest to the first LED chip is a second LED chip, and among the plurality of LED chips of the second LED lighting sheet, the LED chip closest to the first LED chip of the first LED lighting sheet is a third LED chip. chip, the distance between the first LED chip and the second LED chip is A1, and the distance between the first LED chip and the third LED chip is B1,
0.5×A1≦B1≦1.5×A1
The following relationship is satisfied.

The LED lighting sheet for growing animals and plants included in the LED lighting sheet assembly for growing shelves for animals and plants according to the present embodiment is a sheet-shaped LED lighting device, so it can be used as a straight tube type LED bar light in which a plurality of LEDs are arranged. The overall thickness can be made thinner. Therefore, by narrowing the vertical interval between the LED lighting sheet assemblies of the animal and plant growing shelves, it is possible to improve the yield of animals and plants to be grown per floor area of the plant and animal growing factory. In addition, since the thickness of the LED chip is smaller than the thickness of the LED straight tube, the LED lighting sheet can compensate for the difference in height between the place where the LED chip is placed and the place where the LED chip is not placed. The height difference can be made smaller than the difference in height between the place where the LED straight pipe is placed and the place where the LED straight pipe is not placed. Therefore, shadows on the sides of the LED chips are less likely to occur, so even when animals and plants grow close to the LED lighting sheet, variations in the light irradiated to animals and plants can be suppressed. In LED lighting equipment for raising animals and plants, it is important to suppress variations in the light irradiated to animals and plants because it keeps the size and quality of the animals and plants grown within a certain standard range and reduces non-conforming products. be. In the cultivation of animals and plants, it is important to control the light and heat irradiated to the animals and plants in the later stages of growth, when they grow and photosynthesis becomes active. The LED lighting sheet for growing animals and plants according to the present embodiment can suppress variations in relatively strong light irradiated to animals and plants when the animals and plants are close to the LED lighting sheet.

In addition, since the LED lighting sheet for growing animals and plants is a sheet-shaped LED lighting device, it is possible to increase the amount of animals and plants that are grown while suppressing a decrease in the yield of animals and plants that are grown, and to increase the amount of animals and plants that are grown with a good yield. It can be obtained with In LED lighting equipment for growing animals and plants, even if you simply increase the amount of light to increase the amount of animals and plants that grow, if you cannot suppress the variations in the light, the variations will become larger and the number of non-conforming products will increase. Yield may decrease. Generally, in an animal and plant breeding factory, it is considered preferable to increase the illuminance of the light emitted from the LED chip in order to grow animals and plants more quickly. However, it has been found that simply increasing the illuminance of the light emitted from the LED chip causes variations in the growth speed of a plurality of plants and animals arranged within a plane. Especially in the later stages of animal and plant growth, the speed of growth varies, resulting in poor growth, such as some animals and plants not being fully grown or a growth disorder called chip burn occurring in some animals and plants. was found to increase. This is because in the later stages of animal and plant growth, animals and plants approach the LED lighting sheet above, so animals and plants close to the LED chip receive a large amount of light, while animals and plants far from the LED chip receive sufficient light. This is thought to be due to the lack of supply, resulting in differences in the growth speeds of these animals and plants.

According to the LED lighting sheet assembly for animal and plant growing shelves according to the present embodiment, the relationship 0.5×A1≦B1≦1.5×A1 is satisfied, so that the first LED lighting sheet and the second LED lighting sheet In the vicinity of the gap between them, the distance between the first LED chip and the third LED chip is made closer to the distance between the other LED chips on the first LED lighting sheet and the second LED lighting sheet. This reduces variations in the illuminance of light from the LED chips in the vicinity of the gap between the first LED lighting sheet and the second LED lighting sheet, thereby making the amount of light below the LED lighting sheet uniform. As a result, the amount of light irradiated from the LED chips becomes uniform within the plane, and the entire lower region of the first LED lighting sheet and the second LED lighting sheet including the gap between the first LED lighting sheet and the second LED lighting sheet. , it is possible to eliminate places where the amount of light irradiation is insufficient. This makes it possible to make the growth speed of animals and plants uniform within the surface, especially in the latter stages of their growth. Moreover, since there is no place where the amount of light irradiated from the LED chip is excessive, it is possible to suppress the occurrence of a growth disorder called chip burn in animals and plants.

Since the animal and plant growing shelves and the animal and plant growing factory according to the present embodiment are equipped with the above-mentioned LED lighting sheet assembly for the animal and plant growing shelves according to the present embodiment, it is possible to obtain animals and plants in a good yield.

Hereinafter, one embodiment will be specifically described with reference to the drawings. Each figure shown below is shown schematically. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. Further, it is possible to implement the invention with appropriate changes within the scope of the technical concept. In each figure shown below, the same parts are given the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values such as dimensions and material names of each member described in this specification are examples of embodiments, and are not limited to these, and can be appropriately selected and used. In this specification, terms specifying shapes and geometrical conditions, such as terms such as parallel, perpendicular, and perpendicular, are not only meant strictly, but also include substantially the same state. In this specification, animals and plants mean animals and/or plants. In the following, for convenience, the case where plants are grown (cultivated) using an LED lighting module will be explained as an example, but the present invention can also be applied to the case where animals are grown as long as there is no contradiction.

First, a description will be given of an LED lighting module for growing plants, which includes an LED lighting sheet for growing plants used in the LED lighting sheet assembly for a plant growing shelf according to the present embodiment.

(LED lighting module for plant growth)
The LED lighting module 10 for growing plants shown in FIG. 1 (hereinafter also referred to as LED lighting module 10) is installed in a plant growing factory 90 (FIG. 7) that uses artificial light to grow plants, as described later. It is something to do. Such an LED lighting module 10 includes an LED lighting sheet 20 for growing plants (hereinafter also referred to as LED lighting sheet 20) and a control unit 40 electrically connected to the LED lighting sheet 20.

As shown in FIG. 2, the LED lighting sheet 20 has a plurality of LED chips 21 arranged on the light emitting surface side of the sheet surface (the side facing toward the plants when in use). By using such a direct type LED lighting sheet 20, the irradiated light from the LED chips 21 passes through the light emitting surface and reaches the plants directly below, so the amount of light is increased and the growth of plants is promoted. In addition, by reducing the thickness of the entire sheet, shadows on the sides of the LED chips 21 can be made less likely to occur. Although FIG. 2 shows an example of a direct-type LED illumination sheet 20, the present invention is not limited to this, and an edge-light type LED illumination sheet with a light guide plate or the like interposed therebetween may be used. Edge light type LED lighting sheets can easily suppress variations in the amount of light from the light emitting surface. The LED lighting sheet 20 in FIG. 2 includes a flexible wiring board 30 and a plurality of LED chips 21 regularly arranged on the flexible wiring board 30. By using such a flexible wiring board 30, an LED lighting sheet 20 having a relatively large sheet surface area can be obtained. Generally, in plant growing factories and plant growing shelves, a plurality of LED lighting sheets 20 are used in an array, but if the positions of adjacent LED lighting sheets 20 vary, the amount of light will vary, which will reduce the yield of plants. may decrease. Since the LED illumination sheet 20 having a relatively large sheet surface area can reduce the number of LED illumination sheets 20 used, it is possible to suppress variations in the amount of light due to the arrangement of the plurality of LED illumination sheets 20. Although FIG. 2 shows an example of the LED lighting sheet 20 including the flexible wiring board 30, the present invention is not limited to this, and an LED lighting sheet including a rigid wiring board may be used. LED lighting sheets equipped with rigid wiring boards have high resistance to stress and are less likely to break. Note that in FIG. 2, illustrations of a light reflective insulating protective film 34 and a transparent protective film 35, which will be described later, are omitted.

In this case, the LED chips 21 are arranged in a grid pattern in the flexible wiring board 30 in a plan view. That is, the LED chips 21 are arranged in multiple stages and rows in a matrix, and N stages R of M LED chips 21 connected in series are arranged. For example, in FIG. 2, 14 (M=14) LED chips 21 are connected in series along the first arrangement direction (X direction) of the LED chips 21. Furthermore, 10 stages (N=10) of stages R having these 14 LED chips 21 are arranged in parallel along the second arrangement direction (Y direction) of the LED chips 21. Note that the number of LED chips 21 arranged is not limited to this. Specifically, the LED chips 21 are arranged in series from 10 to 14 (14≧M≧10) along the first arrangement direction (X direction), and this stage R is arranged in the second row of the LED chips 21. It is preferable to arrange them in parallel along the arrangement direction (Y direction) of 4 or more and 10 or less (10≧N≧4). By arranging ten or more LED chips 21 in series, the LED chips 21 can be arranged at short intervals along the first arrangement direction (X direction), and in-plane variations in illuminance of the LED lighting sheet 20 can be reduced. It is possible to suppress variations in light irradiated to plants. By arranging 14 or less LED chips 21 in series, power consumption can be reduced, and running costs such as utility costs in the plant growing factory 90 can be reduced. Furthermore, by arranging four or more stages of LED chips 21 in parallel in the second arrangement direction (Y direction) of LED chips 21, even if a particular LED chip 21 is damaged, the LED chips 21 of other stages It is possible to prevent the illuminance of the entire LED illumination sheet 20 from being extremely reduced. Moreover, by limiting the range where the illuminance of the LED illumination sheet 20 has decreased, it is possible to limit the range where non-conforming products may occur and suppress a decrease in yield. In addition, if the LED lighting sheet 20 is a direct type, there is a high risk of damage due to strong contact with the LED chips 21 during installation or cleaning, so it is important to take measures in the event of damage. This is important from the perspective of Furthermore, by arranging ten or less stages of LED chips 21 in parallel, power consumption can be reduced, and running costs such as utility costs in the plant growing factory 90 can be reduced.

The LED lighting sheet 20 has a plurality of metal wiring parts 22, and the plurality of metal wiring parts 22 are arranged along a first arrangement direction (X direction). The plurality of metal wiring portions 22 arranged along the first arrangement direction (X direction) correspond to each stage R of the LED chips 21, respectively. The LED chips 21 are arranged so as to straddle a pair of metal wiring sections 22 that are adjacent to each other in the X direction. Further, each terminal (not shown) of the LED chip 21 is electrically connected to a pair of metal wiring portions 22, respectively. The plurality of metal wiring parts 22 constitute a power supply part to the LED chips 21, and by supplying power to the plurality of metal wiring parts 22, all the LED chips 21 arranged in the relevant stage R light up. . Note that the plurality of metal wiring sections 22 constitute a part of a metal wiring section 32 that will be described later.

The distance Px between the LED chips 21 in the first arrangement direction (X direction) is preferably 37 mm or more and 50 mm or less. Moreover, it is preferable that the interval Py between the LED chips 21 in the second arrangement direction (Y direction) is 37 mm or more and 100 mm or less. By setting the interval between the LED chips 21 within the above range, the brightness of the LED illumination sheet 20 is made uniform within the surface, and variations in the light irradiated to plants are suppressed, and the power consumption of the LED illumination sheet 20 is suppressed. I can do it.

The thickness of the thickest portion of the LED lighting sheet 20 is preferably 5 mm or less. By reducing the thickness of the LED lighting sheet 20 in this way, it is possible to narrow the vertical distance between the substrates (supports) 81 (FIG. 8) on which the LED lighting sheets 20 are installed, which allows each plant to The number of substrates 81 per cultivation shelf 80 (FIG. 8) can be increased. As a result, the yield of plants per unit area can be increased. Further, when the plants and the LED lighting sheet 20 are close to each other, variations in relatively strong light irradiated to the plants can be further suppressed.

The arrangement of the LED chips 21 is not limited to a lattice pattern in plan view, but may be arranged in a staggered pattern in plan view, as shown in FIG. 3(a). Further, the LED chips 21 do not have to be arranged uniformly within the surface of the LED lighting sheet 20. For example, the density of the LED chips 21 may be further increased in the peripheral portion of the LED lighting sheet 20. Specifically, as shown in FIG. 3(b), the LED chips 21 are arranged in a lattice pattern at the center of the LED lighting sheet 20 (the lower part of FIG. 3(b)), and the LED chips 21 are arranged in the shape of grid points at the center of the LED lighting sheet 20 (the lower part of FIG. 3(b)), and The LED chips 21 may be arranged in a staggered manner (in the upper part of FIG. 3(b)). Thereby, it is possible to suppress a decrease in the brightness of the LED lighting sheet 20 at the peripheral portion of the LED lighting sheet 20, make the brightness of the LED lighting sheet 20 uniform within the surface, and suppress variations in the light irradiated to the plants. .

Although the overall shape of the LED lighting sheet 20 is rectangular in plan view, the size and planar shape of the LED lighting sheet 20 are not particularly limited. Since the LED lighting sheet 20 has a high degree of freedom in processing its size and shape, it can flexibly respond to various demands in this regard. Furthermore, by taking advantage of its flexibility, it is possible to attach it not only to flat installation surfaces but also to installation surfaces of various shapes. Furthermore, since the LED lighting sheet 20 itself has rigidity, for example, by bending the LED lighting sheet 20 into a cylindrical shape so that the LED chips 21 are on the outside, the LED lighting sheet 20 can be used alone as lighting even without an installation surface. It is also possible.

In FIG. 2, the length Lx of the LED lighting sheet 20 in the first arrangement direction (X direction) is preferably 500 mm or more and 700 mm or less, and more preferably 550 mm or more and 650 mm or less. The length Ly of the LED lighting sheet 20 in the second arrangement direction (Y direction) is preferably 300 mm or more and 500 mm or less, and more preferably 350 mm or more and 450 mm or less. By setting the size of the LED lighting sheet 20 within the above range, the LED lighting sheet 20 can be adapted to a general plant growing substrate 81 (FIG. 8), and the dead space of the substrate 81 can be reduced. . In addition, since the size of each LED lighting sheet 20 is not excessively large, even if a specific LED chip 21 is damaged, the influence on other LED chips 21 can be minimized, and the growth of plants can be improved. It is possible to prevent the illuminance of the entire shelf board (LED lighting sheet assembly) 83 (FIG. 8) from being extremely reduced, and to limit the range in which the illuminance decreases.

Next, the control section 40 will be explained. As shown in FIG. 1, the control unit 40 supplies power to the LED illumination sheet 20 and controls light emission and the like of the LED illumination sheet 20. This control unit 40 is detachably connected to the LED illumination sheet 20 via a first connector 44A provided on the LED illumination sheet 20. That is, the control unit 40 is configured separately from the LED lighting sheet 20 and is connected to the LED lighting sheet 20 externally. That is, the control unit 40 is not integrated with the LED lighting sheet 20. Thereby, the control unit 40 serving as a heat source can be separated from the LED lighting sheet 20, and the heat from the control unit 40 can be prevented from affecting the growth of plants.

The control unit 40 also includes a power input unit 41, an AC/DC converter (driver) 42, and a PWM control unit 43. Among these, the power input section 41 is supplied with an AC voltage having an arbitrary voltage of, for example, 100V to 240V. The AC/DC converter 42 converts an alternating current voltage of 100V to 240V into a constant voltage (for example, 44V) direct current voltage. The PWM control unit 43 controls the light of the LED chips 21 of the LED lighting sheet 20 by arbitrarily changing the pulse width of the constant voltage waveform from the AC/DC converter 42 . That is, the PWM control section 43 also serves as a dimming control section that controls dimming of the LED lighting sheet 20. A constant voltage output from the PWM control section 43 is applied to the LED lighting sheet 20 via the first connector 44A.

By applying a constant voltage to the LED lighting sheet 20 from the PWM control unit 43 of the control unit 40, the dimming of the LED chip 21 is controlled, unlike the case where a rectified pulse voltage is directly applied to the LED lighting sheet 20. It becomes possible to do so. That is, the PWM control unit 43 can arbitrarily control the illuminance of the LED chip 21 by appropriately changing the duty ratio of the DC voltage from the AC/DC converter 42. For example, as shown in FIG. 4(a), the PWM control unit 43 suppresses the duty ratio of the constant voltage from the AC/DC converter 42 from 100% (solid line) to 50% (dotted line). The illumination intensity can be reduced.

By appropriately adjusting the illuminance of the LED chips 21 in this way, the illuminance of the LED illumination sheet 20 can be adjusted according to the growth stage of the plants, and the degree of growth of the plants can be adjusted. For example, the illuminance of the LED illumination sheet 20 may be lowered during the early stages of growth when the leaves of the plant are small, and the illumination intensity of the LED illumination sheet 20 may be increased during the later stages of growth when the leaves of the plant are large. Alternatively, in the early stage of growth when the plant is short, the distance between the plant and the LED chip 21 is large, so the illuminance of the LED lighting sheet 20 is increased, and in the late stage of growth when the plant is large, the distance between the plant and the LED chip 21 is increased. 21, the illuminance of the LED illumination sheet 20 may be lowered. As another example of adjusting the illuminance of the LED lighting sheet 20, the illuminance may be set high for a type of plant that requires high illuminance, and the illuminance may be set low for a type of plant that can be grown even with low illuminance. If you want to speed up the shipping time, you can increase the illuminance, and if you want to delay the shipping time, you can lower the illuminance.

Further, by applying a constant voltage to the LED illumination sheet 20 from the PWM control unit 43, the integrated amount of light per unit time from the LED illumination sheet 20 can be increased. That is, for example, the cumulative light amount when a constant voltage is applied to the LED illumination sheet 20 (the area of the shaded part in FIG. 4(b)). Thereby, the luminous efficiency of light from the LED lighting sheet 20 can be increased, and the efficiency of growing plants can be improved.

Referring to FIG. 1 again, the LED lighting sheet 20 is provided with a regulator 45. In this case, regulators 45 are provided corresponding to each row of LED chips 21, and specifically, 10 regulators 45 are provided corresponding to 10 rows of LED chips 21. . This regulator 45 serves to maintain a constant current flowing through the plurality of LED chips 21 in each column. Thereby, even if one LED chip 21 is damaged, it is possible to suppress excessive current from flowing to the LED chips 21 in other rows and prevent the LED chips 21 in other rows from being damaged. As a result, it is possible to prevent the illuminance of the entire LED lighting sheet 20 from being extremely reduced, and it is possible to suppress variations in the light irradiated to the plants. In addition, the regulator 45 can control the amount of current for each column by the connected resistance value. For example, by changing the control resistance values of the first column and the last column, only the output of peripheral columns can be controlled. I can give it to you. Normally, this aims to ensure uniformity by laying the LED lighting sheets 20 close together without any gaps, but from the viewpoint of cost and ensuring ventilation, it is assumed that the LED lighting sheets 20 are spaced approximately 5 cm to 10 cm apart. You can also expect the effect of erasing the seams.

Further, the LED lighting sheet 20 is provided with a power supply line 46 branching from the first connector 44A. Further, a second connector 44B is provided on the LED lighting sheet 20. The power supply line 46 is not electrically connected to the LED chips 21 of the LED lighting sheet 20, but is electrically connected to the wiring of other LED lighting sheets 200 having the same configuration as the LED lighting sheet 20. Connected. That is, the power supply line 46 is detachably connected to the wiring of the LED lighting sheet 200 via the second connector 44B and another first connector 44A provided on the other LED lighting sheet 200. Current from the power supply line 46 is supplied to the other LED lighting sheets 200 via the second connector 44B and the other first connector 44A. Thereby, the two LED lighting sheets 20, 200 can be connected and these two LED lighting sheets 20, 200 can be controlled simultaneously by one control unit 40. Since a plurality of LED lighting sheets 20, 200 can be controlled simultaneously by one control unit 40, the number of control units 40, which are heat generation sources, can be reduced. Variations in growth are less likely to occur, and a decrease in yield can be suppressed.

(Each component of LED lighting sheet)
Next, each member constituting the LED lighting sheet 20 will be explained. As shown in FIG. 5, the LED lighting sheet 20 includes a flexible wiring board 30 and a plurality of LED chips 21 arranged on the flexible wiring board 30. Among these, the flexible wiring board 30 has a flexible substrate film 31 and a metal wiring portion 32 formed on the surface of the substrate film 31 (the surface on the light emitting surface side). The metal wiring section 32 is laminated on the substrate film 31 via an adhesive layer 33.

Each LED chip 21 is mounted on the metal wiring section 32 in a manner that allows conduction. In this LED lighting sheet 20, since the LED chips 21 are mounted on the flexible wiring board 30, it is possible to arrange a plurality of LED chips 21 at a desired high density.

A light reflective insulating protective film 34 is formed to cover an area of the LED lighting sheet 20 excluding the area where the LED chip 21, the regulator 45, the first connector 44A, and the second connector 44B are provided and the surrounding area. ing. This light reflective insulating protective film 34 is arranged to cover the metal wiring section 32. The light reflective insulating protective film 34 is a layer that has both an insulating function that contributes to improving the anti-migration characteristics of the LED lighting sheet 20 and a light reflecting function that contributes to improving the optical environment created by the LED lighting sheet 20. This layer is formed from an insulating resin composition containing a white pigment. If anti-migration characteristics and a light reflecting function can be obtained only with the metal wiring portion 32 described above and the transparent protective film 35 described below, a structure without the light reflective insulating protective film 34 is also possible.

Further, a transparent protective film 35 is formed to cover the light reflective insulating protective film 34 and the LED chip 21 . The transparent protective film 35 is a resinous film formed on the outermost surface (the surface located closest to the light emitting surface) of the LED illumination sheet 20 mainly to ensure its waterproofness.

A solder portion 36 is provided on the metal wiring portion 32. Each LED chip 21 is electrically connected to a metal wiring section 32 via a solder section 36, respectively.

(Substrate film)
As the substrate film 31, a flexible resin film can be used. In this specification, "having flexibility" means "having a radius of curvature of at least 1 m or less, preferably 50 cm, more preferably 30 cm, still more preferably 10 cm, particularly preferably 5 cm. "thing".

As the material for the substrate film 31, a thermoplastic resin having high heat resistance and insulation properties may be used. As such a resin, polyimide resin (PI) and polyethylene naphthalate (PEN), which are excellent in heat resistance, dimensional stability during heating, mechanical strength, and durability, can be used. Among these, polyethylene naphthalate (PEN), which has improved heat resistance and dimensional stability by performing heat resistance improvement treatment such as annealing treatment, can be preferably used. Alternatively, polyethylene terephthalate (PET) whose flame retardance has been improved by adding a flame retardant inorganic filler or the like may be used.

The thickness of the substrate film 31 is not particularly limited, but is approximately 10 μm or more and 500 μm from the viewpoints of not becoming a bottleneck as a heat dissipation path, having heat resistance and insulation properties, and balancing manufacturing costs. Hereinafter, it is preferably 50 μm or more and 250 μm or less. Further, from the viewpoint of maintaining good productivity when manufacturing by roll-to-roll method, the thickness is preferably within the above range.

(adhesive layer)
As the adhesive forming the adhesive layer 33, a known resin adhesive can be appropriately used. Among these resin adhesives, urethane-based, polycarbonate-based, silicone-based, ester-based, or epoxy-based adhesives can be particularly preferably used.

(Metal wiring part)
The metal wiring portion 32 is a wiring pattern formed on the surface of the substrate film 31 (the surface on the light emitting surface side) using a conductive base material such as metal foil. This metal wiring portion 32 is preferably formed on the surface of the substrate film 31 via an adhesive layer 33 by a dry lamination method. The metal wiring section 32 includes the plurality of metal wiring sections 22 described above. The plurality of metal wiring parts 22 include a first metal wiring part 22A and a second metal wiring part 22B arranged apart from the first metal wiring part 22A. The LED chip 21 is mounted on the first metal wiring section 22A and the second metal wiring section 22B, and the LED chip 21 is electrically connected to the first metal wiring section 22A and the second metal wiring section 22B. has been done. The LED chip 21 is turned on by power supplied to the first metal wiring section 22A and the second metal wiring section 22B.

The metal wiring portion 32 preferably has a high level of both heat dissipation and electrical conductivity, and may be made of copper foil, for example. In this case, the heat dissipation from the LED chips 21 is stabilized and an increase in electrical resistance can be prevented, so that variations in light emission between the LED chips 21 are reduced and stable light emission is possible. Furthermore, the life of the LED chip 21 is also extended. Furthermore, since deterioration of peripheral members such as the substrate film 31 due to heat can be prevented, the product life of the LED lighting sheet 20 can also be extended. Examples of the metal forming the metal wiring portion 32 include metals such as aluminum, gold, and silver in addition to the above-mentioned copper.

The thickness of the metal wiring portion 32 may be appropriately set depending on the magnitude of withstand current required of the flexible wiring board 30 and the like. However, in order to suppress warping due to heat shrinkage of the substrate film 31 during soldering processing using a reflow method or the like, it is preferable that the thickness of the metal wiring portion 32 is 10 μm or more. On the other hand, the thickness of the metal wiring portion 32 is preferably 50 μm or less, thereby making it possible to maintain sufficient flexibility of the flexible wiring board 30 and preventing deterioration in handling properties due to increased weight. be able to.

(Solder part)
The solder portion 36 is for joining the metal wiring portion 32 and the LED chip 21. This solder bonding can be performed by either a reflow method or a laser method.

(LED chip)
The LED chip 21 is a light emitting element that utilizes light emission at a PN junction where a P-type semiconductor and an N-type semiconductor are joined. The LED chip 21 may have a structure in which a P-type electrode and an N-type electrode are provided on the upper and lower surfaces of the element, respectively, or a structure in which both a P-type electrode and an N-type electrode are provided on one side of the element. It's okay.

Further, as the LED chip 21, it is preferable to select one with high luminous efficiency. Specifically, as the LED chip 21, it is preferable to use one having a luminous efficiency of 150 lm/W or more, and it is more preferable to use one having a luminous efficiency of 180 lm/W or more. By increasing the luminous efficiency of the LED chips 21 to 150 lm/W or more, it is possible to reduce the number of LED chips 21 mounted (density) and reduce heat generation due to Joule heat from the LED chips 21. This makes it difficult for variations in plant growth to occur due to this, and can suppress a decrease in yield.

As described above, the LED lighting sheet 20 is one in which the LED chips 21 are directly mounted on the metal wiring portion 32 that can exhibit high heat dissipation. As a result, even when the LED chips 21 are arranged at a high density, the excess heat generated when the LED chips 21 are lit is quickly diffused through the metal wiring section 32, and is transferred to the outside of the LED lighting sheet 20 via the substrate film 31. Since heat from the LED chip 21 can be sufficiently dissipated, variations in plant growth due to heat from the LED chip 21 are less likely to occur, and a decrease in yield can be suppressed.

(Light reflective insulation protective film)
The light reflective insulating protective film 34 is a layer formed in a region excluding the region where the LED chip 21 is provided and its peripheral region. This light reflective insulating protective film 34 is a so-called resist layer that improves the migration resistance characteristics of the flexible wiring board 30 by having sufficient insulation, and also reduces the luminance of the light environment created by the LED lighting sheet 20. This is a light reflective layer with light reflective properties that contributes to improvement.

The light-reflective insulating protective film 34 can be formed from various resin compositions that use a urethane resin or the like as a base resin and further contain a white pigment made of an inorganic filler such as titanium oxide. As the base resin of the resin composition used to form the light-reflective insulating protective film 34, in addition to urethane resins, acrylic polyurethane resins, polyester resins, phenol resins, and the like can be used as appropriate. As the base resin of the resin composition forming the light-reflective insulating protective film 34, it is more preferable to use the same or similar resin as the resin composition forming the transparent protective film 35. Regarding the transparent protective film 35, it is preferable to use acrylic polyurethane resin as the main material resin, as will be described later. From this, when the base resin of the resin composition for forming the transparent protective film 35 is an acrylic polyurethane resin, the base resin of the resin composition for forming the light reflective insulating protective film 34 is a urethane resin or More preferably, it is an acrylic polyurethane resin.

Inorganic fillers to be included as white pigments in the resin composition forming the light-reflective insulating protective film 34 include, in addition to titanium oxide, alumina, barium sulfate, magnesia, aluminum nitride, boron nitride, barium titanate, kaolin, At least one selected from talc, calcium carbonate, zinc oxide, silica, mica powder, powdered glass, powdered nickel, and powdered aluminum can be used.

The thickness of the light reflective insulating protective film 34 is 5 μm or more and 50 μm or less, more preferably 7 μm or more and 20 μm or less. If the thickness of the light-reflective insulating protective film 34 is less than 5 μm, the light-reflecting insulating protective film becomes thin, especially at the edge portion of the metal wiring portion 32, and if the metal wiring cannot be covered and is exposed. The risk of not being able to maintain insulation increases. On the other hand, from the viewpoint of preserving the light-reflecting insulating protective film 34 from substrate curvature during handling, transportation, etc., the thickness of the light-reflecting insulating protective film 34 is preferably 50 μm or less.

Further, the light reflective insulating protective film 34 preferably has a light reflectance of 65% or more, more preferably 70% or more, and preferably 80% or more at wavelengths of 400 nm or more and 780 nm or less. More preferred. The LED lighting sheet 20 includes, for example, 20 parts by mass or more of titanium oxide based on 100 parts by mass of a urethane-based or acrylic polyurethane base resin, so that the thickness of the light-reflective insulating protective film 34 is 8 μm. In this case, the light reflectance of the same layer can be 75% or more.

(Transparent protective film)
The transparent protective film 35 is formed on the outermost surface of the LED lighting sheet 20 so as to cover the LED chips 21. The transparent protective film 35 has waterproofness and transparency. The waterproof property of the transparent protective film 35 can prevent water from entering the inside of the device when the LED lighting sheet 20 is used as a light source for growing plants. If a LED chip 21 with a high luminous efficiency, such as one with a luminous efficiency of 150 lm/W or more, is selected, the damage of a particular LED chip 21 in the LED lighting sheet 20 will have a large effect. Therefore, it is important from the viewpoint of risk management to make the LED chip 21 as hard to damage as possible.

The transparent protective film 35 can be formed from various resin compositions using acrylic polyurethane resin or the like as a base resin. As the base resin of the resin composition used to form the transparent protective film 35, in addition to acrylic polyurethane resin, urethane resin, polyester resin, phenol resin, etc. can be used as appropriate. As the base resin of the resin composition forming the transparent protective film 35, it is more preferable to use the same or similar resin as the resin composition forming the light reflective insulating protective film 34. A preferred specific combination is a combination in which the base resin of the resin composition forming the light reflective insulating protective film 34 is a urethane resin, and the same resin forming the transparent protective film 35 is an acrylic polyurethane resin. can.

The thickness of the transparent protective film 35 is 10 μm or more and 40 μm or less, preferably 15 μm or more and 30 μm or less, and more preferably 20 μm or more and 25 μm or less. By setting the thickness of the transparent protective film 35 within the above range, it is possible to maintain good flexibility, thinness, and lightness of the LED lighting sheet 20, as well as good optical properties required for plant growth applications. Furthermore, the LED lighting sheet 20 can be provided with sufficient waterproofness required for plant growing applications.

The water resistance of the LED lighting sheet 20 due to the transparent protective film 35 is as long as it is possible to suppress deterioration of the LED chips 21 when water for growing plants is sprayed on the LED lighting sheet 20. Not particularly limited. As for such water resistance, it is preferable to exhibit IPX4 or higher according to the waterproof and dustproof protection standards defined by the IEC (International Electrotechnical Commission). Waterproofness of IPX4 or higher is such that the LED chip 21 is not adversely affected by water splashes from any direction. Specifically, when water was sprayed from a water nozzle at a water rate of 10 L/min for 5 minutes over the entire range of ±180° with respect to the normal direction of the LED lighting sheet 20, there was no harmful effect on the LED chips 21. It is said that it will not happen.

(Manufacturing method of LED lighting sheet)
Next, a method for manufacturing the LED lighting sheet 20 will be described with reference to FIGS. 6(a) to 6(h).

First, a substrate film 31 is prepared (FIG. 6(a)). Next, a metal foil 32A such as copper foil, which is the material of the metal wiring portion 32, is laminated on the surface of the substrate film 31 (FIG. 6(b)). The metal foil 32A is bonded to the surface of the substrate film 31 with an adhesive layer 33 such as a urethane adhesive. Alternatively, the metal foil 32A may be directly formed on the surface of the substrate film 31 by an electrolytic plating method or a vapor phase film forming method (sputtering, ion plating, electron beam evaporation, vacuum evaporation, chemical vapor deposition, etc.). Alternatively, the substrate film 31 may be directly welded to the metal foil 32A.

Next, an etching mask 37 patterned into the shape required for the metal wiring section 32 is formed on the surface of the metal foil 32A (FIG. 6(c)). This etching mask 37 is provided so that the portion of the metal foil 32A that will become the metal wiring portion 32 corresponding to the wiring pattern is not corroded by the etching solution. The method for forming the etching mask 37 is not particularly limited, and for example, it may be formed by exposing a photoresist or dry film to light through a photomask and then developing it, or by printing the metal foil 32A using a printing technique such as an inkjet printer. An etching mask may be formed on the surface.

Next, the metal foil 32A located at a portion not covered by the etching mask 37 is removed using an immersion liquid (FIG. 6(d)). As a result, the portions of the metal foil 32A other than the portions that will become the metal wiring portions 32 are removed.

Thereafter, the etching mask 37 is removed using an alkaline stripping solution. As a result, the etching mask 37 is removed from the surface of the metal wiring section 32 (FIG. 6(e)).

Subsequently, a light reflective insulating protective film 34 is laminated on the metal wiring portion 32 (FIG. 6(f)). The formation of the light-reflective insulating protective film 34 is not particularly limited as long as it is a coating method that can uniformly apply the material resin composition constituting the light-reflective insulating protective film 34, such as screen printing, offset printing, Methods such as dip coater and brush coating can be used. Alternatively, the light-reflective insulating protective film 34 may be formed by coating the entire surface with a photosensitive insulating protective film material, exposing only necessary areas to light through a photomask, and then developing.

Next, the LED chip 21, regulator 45, and connectors 44A and 44B are mounted on the metal wiring section 32 (FIG. 6(g)). Note that in FIG. 6(g) and FIG. 6(h) to be described later, illustration of the regulator 45 and the like is omitted for clarity of drawing. In this case, the LED chip 21 is joined to the metal wiring part 32 by soldering via the solder part 36. This soldering process can be performed using a reflow method or a laser method, or may be performed using a conductive resin.

Next, a transparent protective film 35 is formed to cover the light reflective insulating protective film 34, the LED chip 21, the regulator 45, and the connectors 44A and 44B (FIG. 6(h)). The transparent protective film 35 is preferably formed by spraying a transparent resin composition (hereinafter referred to as "spray coating method") or by a curtain coating method. Formation of the transparent protective film 35 by the spray coating method is performed, for example, by spraying a coating liquid for spray coating treatment containing an acrylic polyurethane resin onto a desired area on the flexible wiring board 30 using a spray coating machine to form a coating film. This can be done by forming a The transparent protective film 35 is formed by the curtain coating method, for example, by dropping a coating solution for curtain coating treatment containing an acrylic polyurethane resin onto a desired area on the flexible wiring board 30 using a curtain coating machine, and applying a coating film to the flexible wiring board 30. This can be done by forming a

Note that the LED lighting sheet 20 is not limited to the method described above, but may be manufactured by a conventionally known method for manufacturing a flexible wiring board for an LED chip or various LED modules in which an LED chip is mounted thereon. You can also do it.

(Plant growing factory and plant growing shelves)
FIG. 7 is a diagram schematically showing the configuration of a plant growing factory 90 using the LED lighting sheet 20. The plant growing factory 90 includes a building 91 and a plurality of plant growing shelves 80 arranged inside the building 91.

As shown in FIG. 8, the plant growing shelf 80 includes a support 82 and a shelf board (LED lighting sheet assembly) 83 for the plant growing shelf attached to the support 82. In this case, the plant growing shelf 80 includes a plurality of (four) pillars 82 and shelf boards 83 for a plurality of plant growing shelves arranged along the pillars 82 at intervals in the vertical direction. ing. Of these, the shelf board 83 for the plant growing shelf includes a substrate (supporting body) 81 and an LED lighting sheet 20 attached to the lower surface side of the substrate 81 or an LED lighting module 10 attached to the lower surface side of the substrate 81. have. A medium area for cultivating plants PL is provided on the upper surface of each substrate 81 except for the uppermost substrate 81. The lower surface of each board 81 except for the bottom board 81 constitutes a ceiling surface with respect to the board 81 located below the board 81, and the LED lighting sheets 20 are arranged in parallel. In this case, the control unit 40 is placed sufficiently away from the LED lighting sheet 20. Therefore, there is little possibility that the heat from the control unit 40 will cause variations in growth between the plants PL located close to the control unit 40 and the plants PL located far away.

In the illustrated example, the uppermost shelf board 83 for growing a plant further includes a light blocking section 84 attached to the side surface of the substrate 81. This light blocking section 84 blocks the light emitted from the LED lighting sheet 20 attached to the uppermost board 81 and blocks the light that leaks out to the outside of the plant growing shelf 80. It serves to reflect light toward the interior of the shelf 80. Further, the light blocking section 84 is suspended from the uppermost substrate 81 toward the substrate 81 located below the substrate 81 . Thereby, at a position close to the lower surface of the LED lighting sheet 20 on the shelf board 83 for the plant growing shelf, light traveling in a direction leaking to the outside of the plant growing shelf 80 is reflected toward the inside of the growing shelf 80. Therefore, even at a position close to the lower surface of the LED lighting sheet 20, it is possible to reduce in-plane variations in illuminance of the shelf board 83 for the plant growing shelf. The light blocking section 84 may be a sheet-like member having a diffuse reflectance of approximately 70% or more and 90% or less. Note that, as shown in FIG. 8, the light blocking portion 84 may cover only the upper side of the space located between the upper and lower substrates 81 without reaching the substrate 81 located below. In this case, the air permeability of the shelf board 83 for growing a plant can be improved. Alternatively, the light blocking portion 84 may reach as far as the substrate 81 located below, although not shown. In this case, the amount of light reflected toward the inside of the plant growing shelf 80 can be increased, and the yield of plants to be grown can be improved. Furthermore, the light blocking section 84 may be attached to each substrate 81 except for the bottom substrate 81. This embodiment describes a shelf board (LED lighting sheet assembly) 83 (FIG. 8) for such a plant growing shelf, a plant growing shelf 80 (FIG. 8), and a plant equipped with the plant growing shelf 80. A breeding factory 90 (Figure 7) is provided.

Since the LED lighting sheet 20 according to this embodiment is flexible and lightweight, it is easier to attach the LED lighting sheet 20 to the lower surface of each board 81 than with a conventional straight tube lighting device. can be done. Furthermore, since the LED lighting sheet 20 has flexibility, the LED lighting sheet 20 can be attached to ceiling surfaces of various sizes and shapes. As a result, the LED lighting sheet 20 according to the present embodiment can be applied to various plant growing shelves 80 and plant growing factories 90.

Furthermore, the LED lighting sheet 20 is thinner than a conventional straight tube lighting device. Thereby, the interval between the substrates 81 in the vertical direction can be narrowed, and the number of substrates 81 included in each plant growing shelf 80 can be increased. As a result, the yield of plant PL per unit area can be increased.

Next, the shelf board (LED lighting sheet assembly) 83 for a plant growing shelf according to the present embodiment will be described in more detail.

As shown in FIGS. 8 and 9A, a shelf board (LED lighting sheet assembly) 83 for a plant growing shelf includes a substrate (support) 81 and a first plant growing LED attached to the substrate 81. Lighting sheets 20A to 6th LED lighting sheet 20F for plant growth (hereinafter referred to as first LED lighting sheet 20A, second LED lighting sheet 20B, third LED lighting sheet 20C, fourth LED lighting sheet 20D, fifth LED lighting sheet 20E, and third LED lighting sheet 20A, respectively) 6 LED lighting sheet 20F).

In this embodiment, the shelf board 83 for the plant growing shelf includes one substrate 81, and the first LED lighting sheet 20A to the sixth LED lighting sheet 20F are attached to the one substrate 81. The substrate 81 to which each of the LED lighting sheets 20A to 20F is attached may be made of any material as long as it has some degree of rigidity, and may be a metal plate such as aluminum, a wooden board, or the like. Furthermore, for example, a resin plate containing Paronia (registered trademark) or a so-called aluminum composite plate in which a resin plate is sandwiched between aluminum plates may be used. When the substrate 81 is a resin plate or an aluminum composite plate, the substrate 81 can be made lighter and thinner.

Furthermore, each of the LED lighting sheets 20A to 20F may be attached to the substrate 81 using, for example, an adhesive or the like. Furthermore, each of the LED illumination sheets 20A to 20F may be attached to the substrate 81 with, for example, screws, rivets, tackers, or the like. For example, as shown in FIG. 9B, each of the LED lighting sheets 20A to 20F may be attached to the substrate 81 with a rivet r, respectively. In the example shown in FIG. 9B, each of the LED lighting sheets 20A to 20F is attached to the substrate 81 with four rivets r. However, the present invention is not limited to this, and the number of rivets r for attaching each of the LED lighting sheets 20A to 20F to the substrate 81 is arbitrary. Since each of the LED lighting sheets 20A to 20F is attached to the substrate 81 with a rivet r, each of the LED lighting sheets 20A to 20F can be easily attached to and removed from the substrate 81. Therefore, each of the LED lighting sheets 20A to 20F can be easily replaced, and the load on the metal wiring section 32 of each of the LED lighting sheets 20A to 20F can be reduced.

Moreover, as shown in FIG. 9A, the first LED lighting sheet 20A and the second LED lighting sheet 20B are arranged adjacent to each other along the first arrangement direction (X direction). Similarly, the third LED lighting sheet 20C and the fourth LED lighting sheet 20D, as well as the fifth LED lighting sheet 20E and the sixth LED lighting sheet 20F, are arranged adjacent to each other along the first arrangement direction (X direction). There is. Further, the first LED lighting sheet 20A and the third LED lighting sheet 20C are arranged adjacent to each other along the second arrangement direction (Y direction), and the third LED lighting sheet 20C and the fifth LED lighting sheet 20E are arranged adjacent to each other along the second arrangement direction (Y direction). are arranged adjacent to each other along the arrangement direction (Y direction). Similarly, the second LED lighting sheet 20B and the fourth LED lighting sheet 20D are arranged adjacent to each other along the second arrangement direction (Y direction), and the fourth LED lighting sheet 20D and the sixth LED lighting sheet 20F are arranged adjacent to each other along the second arrangement direction (Y direction). They are arranged adjacent to each other along the two arrangement directions (Y direction). The first LED lighting sheet 20A to the sixth LED lighting sheet 20F are each arranged in multiple rows along a first arrangement direction (X direction) and arranged in multiple stages along a second arrangement direction (Y direction). This is the above-mentioned LED lighting sheet 20 having a plurality of LED chips 21. Note that the number of LED lighting sheets 20 arranged along the first arrangement direction (X direction) is arbitrary. For example, three or more LED lighting sheets 20 may be arranged along the first arrangement direction (X direction). They may be arranged along the same line. Similarly, the number of LED lighting sheets 20 arranged along the second arrangement direction (Y direction) is arbitrary; for example, four or more LED lighting sheets 20 are arranged along the second arrangement direction (Y direction). may be arranged along the

In the present embodiment, the LEDs arranged in one stage of the first LED lighting sheet 20A (for example, the top stage R1 shown in FIG. 9A) and located closest to the second LED lighting sheet in the first arrangement direction (X direction) The chip 21 is defined as a first LED chip 21A, and the LED chip 21 arranged on the first stage R1 of the first LED lighting sheet 20A and closest to the first LED chip 21A is defined as a second LED chip 21B. Among the LED chips 21, the LED chip 21 closest to the first LED chip 21A of the first LED lighting sheet 20A is the third LED chip 21C, the distance between the first LED chip 21A and the second LED chip 21B is A1, and the first LED chip 21 is the third LED chip 21C. When the distance between the chip 21A and the third LED chip 21C is B1,
0.5×A1≦B1≦1.5×A1
The following relationship is satisfied.

Thereby, even if the first LED lighting sheet 20A and the second LED lighting sheet 20B are arranged adjacent to each other along the first arrangement direction (X direction), the illuminance of the shelf board 83 for the plant growing shelf In-plane variation can be suppressed. In particular, even at a position of the shelf board 83 for a plant growing shelf close to the lower surface of the LED illumination sheet 20, it is possible to reduce in-plane variations in the illuminance of the shelf board 83 for a plant growing shelf. Therefore, even when the plant grows and becomes taller, it is possible to supply the plant with light of uniform illuminance. As a result, the yield of plants in the plant breeding factory 90 can be improved. In addition, "distance A1 between the first LED chip 21A and the second LED chip 21B" means the distance between the centers of the first LED chip 21A and the second LED chip 21B, and "the distance A1 between the first LED chip 21A and the third LED chip 21B" The distance B1 from the chip 21C means the distance between the centers of the first LED chip 21A and the third LED chip 21C.

By the way, in plant breeding factories, it is desired not only to grow large plants, but also to reduce the number of non-conforming products by keeping the size and quality of plants within a certain standard range. For this reason, unlike normal lighting devices, it is desirable for lighting devices for growing plants to supply light with uniform illuminance to the plants, even when the plants grow and grow taller. It is rare. In contrast, in this embodiment, not only when the height of the plant is small, but also when the height of the plant becomes large, by supplying light with uniform illuminance to the plant, the plant can be grown to a large size. At the same time, the size of the plants can be made uniform. Further, for example, when the plants to be grown are leafy vegetables, by supplying each plant with light of uniform illuminance, variations in leaf color among the plants can be suppressed. Furthermore, by suppressing in-plane variations in the illuminance of the shelf board 83 for growing a plant, it is possible to suppress discoloration of some of the leaves of individual plants. Therefore, it is possible to improve the appearance of the plants to be grown and to grow plants with high market value.

In addition, in this embodiment, the LED chip 21 disposed on the same stage R2 as the third LED chip 21C and closest to the third LED chip 21C is the fourth LED chip 21D, and the third LED chip 21C and the fourth LED chip 21D are connected to each other. When the distance between them is A2,
0.5×A2≦B1≦1.5×A2
This relationship is further satisfied.

Thereby, in-plane variations in illumination of the shelf board 83 for growing a plant can be further suppressed. Therefore, even when the plants grow and become taller, more uniform light can be supplied to the plants, and the yield of plants in the plant breeding factory 90 can be further improved. Note that "distance A2 between the third LED chip 21C and the fourth LED chip 21D" means the distance between the centers of the third LED chip 21C and the fourth LED chip 21D.

Further, the LED chips 21 are arranged in one row of the first LED lighting sheet 20A (for example, the leftmost row C1 shown in FIG. 9A) and are located closest to the third LED lighting sheet in the second arrangement direction (Y direction). is the fifth LED chip 21E, the LED chip 21 arranged in the corresponding one column C1 of the first LED lighting sheet 20A and closest to the fifth LED chip 21E is the sixth LED chip 21F, and the plurality of LED chips of the third LED lighting sheet 20C Among the LED chips 21, the LED chip 21 closest to the fifth LED chip 21E of the first LED lighting sheet 20A is the seventh LED chip 21G, the distance between the fifth LED chip 21E and the sixth LED chip 21F is A3, and the fifth LED chip 21E When the distance between and the seventh LED chip 21G is B2,
0.5×A3≦B2≦1.5×A3
The following relationship is satisfied.

Thereby, even if the first LED lighting sheet 20A and the third LED lighting sheet 20C are arranged adjacent to each other along the second arrangement direction (Y direction), the illuminance of the shelf board 83 for the plant growing shelf is In-plane variation can be suppressed. In particular, even at a position of the shelf board 83 for a plant growing shelf close to the lower surface of the LED illumination sheet 20, it is possible to reduce in-plane variations in the illuminance of the shelf board 83 for a plant growing shelf. Therefore, even when the plants grow and become taller, uniform light can be supplied to the plants, and the yield of plants in the plant growing factory 90 can be improved. Note that "distance A3 between the fifth LED chip 21E and the sixth LED chip 21F" means the distance between the centers of the fifth LED chip 21E and the sixth LED chip 21F, and "the distance A3 between the fifth LED chip 21E and the seventh LED chip 21F" The distance B2 from the chip 21G means the distance between the centers of the fifth LED chip 21E and the seventh LED chip 21G.

Further, the LED chip 21 arranged in the same column C2 as the seventh LED chip 21G and closest to the seventh LED chip 21G is the eighth LED chip 21H, and the distance between the seventh LED chip 21G and the eighth LED chip 21H is defined as A4. When I did,
0.5×A4≦B2≦1.5×A4
This relationship is further satisfied.

Thereby, in-plane variations in illumination of the shelf board 83 for growing a plant can be further suppressed. Therefore, even when the plants grow and become taller, more uniform light can be supplied to the plants, and the yield of plants in the plant breeding factory 90 can be further improved. Note that "distance A4 between the seventh LED chip 21G and the eighth LED chip 21H" means the distance between the centers of the seventh LED chip 21G and the eighth LED chip 21H.

In addition, in this embodiment, each LED chip 21 of the 3rd LED lighting sheet 20C and each LED chip 21 of the 4th LED lighting sheet 20D are each LED chip 21 of the 1st LED lighting sheet 20A mentioned above, and the 2nd LED lighting sheet 20B, respectively. Since the LED chips 21 are arranged in the same manner as each LED chip 21, a detailed explanation will be omitted here. Similarly, each LED chip 21 of the fifth LED lighting sheet 20E and each LED chip 21 of the sixth LED lighting sheet 20F are also the same as each LED chip 21 of the first LED lighting sheet 20A and each LED chip 21 of the second LED lighting sheet 20B, respectively. Since they are arranged in the same manner as above, detailed explanation will be omitted here.

In addition, in this embodiment, each LED chip 21 of the second LED lighting sheet 20B and each LED chip 21 of the fourth LED lighting sheet 20D are different from each other of the respective LED chips 21 of the first LED lighting sheet 20A and the third LED lighting sheet 20C. Since the LED chips 21 are arranged in the same manner as each LED chip 21, a detailed explanation will be omitted here. Similarly, each LED chip 21 of the third LED lighting sheet 20C, each LED chip 21 of the fifth LED lighting sheet 20E, each LED chip 21 of the fourth LED lighting sheet 20D, and each LED chip 21 of the sixth LED lighting sheet 20F, respectively. Since they are arranged in the same arrangement as each LED chip 21 of the first LED lighting sheet 20A and each LED chip 21 of the third LED lighting sheet 20C described above, detailed explanation will be omitted here.

Note that the first stage of the first LED illumination sheet 20A and the first stage of the second LED illumination sheet 20B may not be arranged on the same straight line with each other in plan view. For example, as shown in FIG. 10A, the steps of the first LED illumination sheet 20A and the steps of the second LED illumination sheet 20B may be arranged in a staggered manner in plan view. Also in this case, at least the distance A1 and the distance B1 satisfy the above-mentioned relationship, so that in-plane variations in illuminance of the shelf board 83 for the plant growing shelf can be suppressed.

Similarly, one row of the first LED illumination sheet 20A and one row of the third LED illumination sheet 20C do not have to be arranged substantially on the same straight line with each other in plan view. For example, as shown in FIG. 10A, a row of first LED lighting sheets 20A and a row of third LED lighting sheets 20C may be arranged in a staggered manner in plan view. Also in this case, at least the distance A3 and the distance B2 satisfy the above-mentioned relationship, so that in-plane variations in illuminance of the shelf board 83 for the plant growing shelf can be suppressed.

Further, in this embodiment, the shelf board 83 for the plant growing shelf includes one substrate 81, and the first LED lighting sheet 20A to the sixth LED lighting sheet 20F are attached to the one substrate 81. Although an example has been described, the invention is not limited to this. For example, as shown in FIG. 10B, a substrate (support body) 81 includes a first substrate (first support body) 81A to which the first LED lighting sheet 20A is attached, and a second substrate (first substrate) to which the second LED lighting sheet 20B is attached. 2 supports) 81B. Further, in this case, the LED lighting sheets 20A to 20F may be attached to different substrates 81A to 81F, respectively. In the illustrated example, the substrate (support body) 81 includes a first substrate 81A to a sixth substrate 81F. In this case, the first LED lighting sheet 20A is attached to the first substrate 81A, the second LED lighting sheet 20B is attached to the second substrate 81B, the third LED lighting sheet 20C is attached to the third substrate 81C, and the fourth LED lighting sheet 20D is attached to the third substrate 81C. is attached to the fourth substrate 81D, the fifth LED illumination sheet 20E is attached to the fifth substrate 81E, and the sixth LED illumination sheet 20F is attached to the sixth substrate 81F. Also in this case, by satisfying the above-mentioned relationship, it is possible to suppress in-plane variations in the illuminance of the shelf board 83 for the plant growing shelf. Note that the first substrate 81A to the sixth substrate 81F are, like the substrate 81 described above, made of, for example, a resin plate containing Paronia (registered trademark) or a so-called aluminum composite plate in which a resin plate is sandwiched between aluminum plates. There may be.

Further, as shown in FIGS. 11A (a) and (b), the LED lighting sheet 20 may be arranged not only on the lower surface of the substrate 81 but also on the side surface of the substrate 81. This side LED lighting sheet 20 is suspended from a substrate 81 located above toward a substrate 81 located below the substrate 81 . In this case, as shown in FIG. 11A(a), the LED lighting sheet 20 may reach the substrate 81 located below. Alternatively, as shown in FIG. 11A(b), the LED lighting sheet 20 may cover only the upper side of the space located between the upper and lower substrates 81 without reaching the substrate 81 located below. In this way, by further arranging the LED lighting sheet 20 on the side surface of the substrate 81, the amount of light at the periphery of the substrate 81, where illuminance tends to be weak, is compensated for, and the brightness of the LED lighting sheet 20 is made uniform within the plane. be able to. As a result, the growth of the plants can be made uniform within the surface, and the yield of the plants to be grown can be improved. In this case, the LED lighting sheet 20 may be attached to the support column 82.

Furthermore, an example has been described in which the LED lighting sheet assembly is a shelf board 83 for a plant growing shelf, which has a substrate (support body) 81 and an LED lighting sheet 20 attached to the lower surface side of the substrate 81. It is not limited to this. That is, in the LED lighting sheet assembly, an example has been described in which the support body to which the LED lighting sheet 20 is attached is the substrate 81, but the support body is not limited to this, and as long as the LED lighting sheet 20 can be supported, the support body The shape etc. of is not a concern. For example, as shown in FIG. 11B, in the LED lighting sheet assembly 83A, the support body to which the LED lighting sheet 20 is attached may be a columnar member 81G. In this case, the columnar member 81G may be a member made of metal such as aluminum, wood, or resin.

As described above, according to the present embodiment, when the distance between the first LED chip 21A and the second LED chip 21B is A1, and the distance between the first LED chip 21A and the third LED chip 21C is B1,
0.5×A1≦B1≦1.5×A1
The following relationship is satisfied. Thereby, even if the first LED lighting sheet 20A and the second LED lighting sheet 20B are arranged adjacent to each other along the first arrangement direction (X direction), the illuminance of the shelf board 83 for the plant growing shelf In-plane variation can be suppressed. In particular, even at a position of the shelf board 83 for a plant growing shelf close to the lower surface of the LED illumination sheet 20, it is possible to reduce in-plane variations in the illuminance of the shelf board 83 for a plant growing shelf. Therefore, even when the plant grows and becomes taller, it is possible to supply the plant with light of uniform illuminance. As a result, the yield of plants in the plant breeding factory 90 can be improved.

Furthermore, by supplying light of uniform illuminance to plants, it is possible to grow the plants large and to make the size of the plants uniform. Further, for example, when the plants to be grown are leafy vegetables, by supplying each plant with light of uniform illuminance, variations in leaf color among the plants can be suppressed. Furthermore, by suppressing in-plane variations in the illuminance of the shelf board 83 for growing a plant, it is possible to suppress discoloration of some of the leaves of individual plants. Therefore, it is possible to improve the appearance of the plants to be grown and to grow plants with high market value. Note that by satisfying the relationship 0.5×A1≦B1≦1.5×A1, it is possible to suppress in-plane variations in illuminance of the shelf board 83 for the plant growing shelf, as shown in the examples described later. This is explained by

Further, according to the present embodiment, when the distance between the third LED chip 21C and the fourth LED chip 21D is A2,
0.5×A2≦B1≦1.5×A2
This relationship is further satisfied. Thereby, in-plane variations in illumination of the shelf board 83 for growing a plant can be further suppressed. Therefore, even when the plants grow and become taller, more uniform light can be supplied to the plants, and the yield of plants in the plant breeding factory 90 can be further improved.

Further, according to the present embodiment, ten or more LED chips 21 are arranged in series, and four or more rows of these LED chips 21 are arranged in parallel. Thereby, the LED chips 21 can be arranged uniformly within the plane, the LED chips 21 can be arranged in parallel, and the risk when the LED chips 21 are damaged can be distributed.

Further, according to the present embodiment, since the LED chip 21 is covered with the transparent protective film 35, the LED chip 21 can be protected from moisture that scatters during the growth of plants.

Further, according to the present embodiment, since the thickness of the LED lighting sheet 20 at its thickest part is 5 mm or less, the distance between the upper and lower substrates 81 of the plant growing shelf 80 can be reduced and the number of substrates 81 can be increased. , can increase plant yield per unit area.

Further, according to the present embodiment, since the control unit 40 is externally connected to the LED lighting sheet 20, the control unit 40 is separated from the LED lighting sheet 20, and the heat from the control unit 40 affects the plants. You can prevent this from happening.

Further, according to the present embodiment, since a constant voltage is applied from the control unit 40 to the LED illumination sheet 20, it is possible to increase the cumulative amount of light per unit time from the LED chips 21 and promote the growth of plants.

Further, according to the present embodiment, the control unit 40 can control the light intensity of the LED chip 21, so that the intensity of light from the LED chip 21 can be adjusted according to the growth stage of the plant. can.

Further, according to this embodiment, the first LED illumination sheet 20A and the second LED illumination sheet 20B are each attached to the substrate 81 with rivets r. Thereby, the first LED illumination sheet 20A and the second LED illumination sheet 20B can be easily attached to and removed from the substrate 81. Therefore, the first LED lighting sheet 20A and the second LED lighting sheet 20B can be easily replaced, and the load on the metal wiring section 32 of the first LED lighting sheet 20A and the second LED lighting sheet 20B can be reduced.

[Example]
Next, specific examples of this embodiment will be described with reference to FIGS. 12 to 15.

(Example 1)
The illuminance of light emitted from a shelf board for growing plants was calculated by simulation. In this simulation, the size of the shelf board was set to 1200 mm x 1200 mm. Further, the size of the LED lighting sheet was set to 560 mm x 390 mm, and the six LED lighting sheets (first to sixth LED lighting sheets) were arranged in the arrangement shown in FIG. 9A. At this time, the distance between adjacent LED lighting sheets was set to 0 mm. Further, in each LED lighting sheet, the plurality of LED chips were arranged in 10 rows of 14 with a pitch of 40 mm in the X direction and a pitch of 35 mm in the Y direction. Further, the luminous flux of each LED chip was set to 100 lm. Furthermore, the distance A1 (see FIG. 9A) between the first LED chip and the second LED chip was set to 40 mm, and the distance B1 (see FIG. 9A) between the first LED chip and the third LED chip was set to 60 mm. Further, a light blocking portion was provided on the side surface of the substrate extending in the Y direction (see FIG. 9A). At this time, the diffuse reflectance of the light blocking section was set to 50%, and the length of the light blocking section along the Z direction (see FIG. 8) was set to 1200 mm.

In this simulation, the distance from the LED chip along the Z direction (see Figure 8) was set to 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, and 300 mm, and the irradiation was performed from the shelf board for the plant growing shelf at each distance. The illuminance of the light emitted was calculated.

(Example 2)
The distance between the first LED lighting sheet and the second LED lighting sheet, the distance between the third LED lighting sheet and the fourth LED lighting sheet, and the distance between the fifth LED lighting sheet and the sixth LED lighting sheet are 40 mm in the X direction and 40 mm in the Y direction, respectively. The illuminance of light irradiated from a shelf board for a plant growing shelf was calculated by simulation in the same manner as in Example 1, except that the height was set to 0 mm.

(Comparative example)
In a shelf board 100 for a plant growing shelf in which a straight tube type lighting device 101 is attached to a shelf board 102 as shown in FIG. 12(a), light irradiated from the shelf board 100 for a plant growing shelf. The illumination intensity was calculated by simulation. At this time, as shown in FIG. 12(b), on a shelf board 100 for a plant growing shelf, a straight tube type lighting device 101 in which 140 LED chips 103 are arranged in the X direction at a pitch of 8 mm is installed in the Y direction. It was set so that six rows were arranged at a pitch of 200 mm. Further, the size of the shelf board 102 was set in the same manner as in the first embodiment, and the LED chip 103 was set as an LED chip having the same luminous flux as in the first embodiment. Furthermore, the shelf board 102 was set to be provided with a light blocking section similar to that in the first embodiment.

The above results are shown in FIGS. 13 to 15 and Table 1. In addition, FIG. 13 is a diagram showing the distribution of illuminance in Example 1, FIG. 13(a) is a diagram showing the calculation result when the distance from the LED chip is 50 mm, and FIG. ) is a diagram showing the calculation result when the distance from the LED chip is 100 mm, FIG. 13(c) is a diagram showing the calculation result when the distance from the LED chip is 150 mm, and FIG. ) is a diagram showing the calculation result when the distance from the LED chip is 200 mm, FIG. 13(e) is a diagram showing the calculation result when the distance from the LED chip is 250 mm, and FIG. ) is a diagram showing calculation results when the distance from the LED chip is 300 mm. Similarly, FIGS. 14(a) to 14(f) are diagrams showing the illuminance distribution in Example 2, when the distances from the LED chip are 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, and 300 mm, respectively. FIGS. 15(a) to 15(f) are diagrams showing the calculation results, and FIGS. 15(a) to 15(f) are diagrams showing the distribution of illuminance in comparative examples, and the distances from the LED chip were 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, and 300 mm, respectively. It is a figure which shows the calculation result in case.

As a result, as shown in FIGS. 13(c)-(f), FIG. 14(c)-(f), and FIG. 15(c)-(f), when the distance from the LED chip is 150 mm or more, In all of Examples 1 and 2 and Comparative Example, it was possible to reduce in-plane variations in the illuminance of the shelf board for the plant growing shelf or the shelf board for the plant growing shelf.

On the other hand, when the distance from the LED chip is 100 mm, the maximum value of illuminance is 67,239 (lx), the minimum value is 52,172 (lx), and the average value is 59,561 (lx) in the comparative example. (lx) (see Table 1). On the other hand, in Example 1, the maximum value of illuminance when the distance from the LED chip is 100 mm is 64,414 (lx), the minimum value is 57,918 (lx), and the average value is 61 , 593 (lx) (see Table 1). In addition, in Example 2, the maximum value of illuminance when the distance from the LED chip is 100 mm is 63,983 (lx), the minimum value is 56,799 (lx), and the average value is 61,362 (lx). lx) (see Table 1). In this manner, in Examples 1 and 2, in-plane variations in illuminance when the distance from the LED chip was 100 mm could be suppressed compared to the comparative example. In particular, in the comparative example, the illuminance range when the distance from the LED chip was 100 mm was 15,067 (lx), but in Example 1, the illuminance range when the distance from the LED chip was 100 mm was 15,067 (lx). In Example 2, the range of illuminance at a distance of 100 mm from the LED chip was reduced to 7,153 (lx). In this way, in Examples 1 and 2, the range of illuminance when the distance from the LED chip was 100 mm was able to be reduced compared to the comparative example. Therefore, in Examples 1 and 2, it was found that in-plane variations in illuminance when the distance from the LED chip was 100 mm could be effectively suppressed compared to the comparative example.

In addition, in the comparative example, the maximum value of illuminance when the distance from the LED chip is 50 mm is 95,608 (lx), the minimum value is 34,686 (lx), and the average value is 62,803 (lx). ) (see Table 1). On the other hand, in Example 1, the maximum value of illuminance when the distance from the LED chip is 50 mm is 67,223 (lx), the minimum value is 57,223 (lx), and the average value is 63,827 (lx). lx) (see Table 1). In addition, in Example 2, the maximum value of illuminance when the distance from the LED chip is 50 mm is 67,049 (lx), the minimum value is 57,571 (lx), and the average value is 63,844 (lx). lx) (see Table 1). In this manner, in Examples 1 and 2, in-plane variations in illuminance when the distance from the LED chip was 50 mm could be suppressed compared to the comparative example. In particular, in the comparative example, the illuminance range when the distance from the LED chip was 50 mm was 60,922 (lx), but in Example 1, the illuminance range when the distance from the LED chip was 50 mm was 60,922 (lx). In Example 2, the illumination range at a distance of 50 mm from the LED chip was reduced to 9,477 (lx). In this way, in Examples 1 and 2, the range of illuminance when the distance from the LED chip was 50 mm was able to be reduced compared to the comparative example. Therefore, in Examples 1 and 2, it was found that in-plane variations in illuminance when the distance from the LED chip was 50 mm could be effectively suppressed compared to the comparative example.

In this manner, according to the present embodiment, it is possible to suppress in-plane variations in illuminance of shelf boards for plant growth shelves. In particular, it is possible to reduce in-plane variations in the illuminance of the shelf board for a plant growing shelf even at a position close to the lower surface of the LED lighting sheet of the shelf board for the plant growing shelf. For example, in the above simulation, the range of illuminance when the distance from the LED chip is 50 mm is from 60,922 (lx) (comparative example) to 10,000 (lx) (example 1) or 9,477 (lx). ) (Example 2). In addition, in the above simulation, the range of illuminance when the distance from the LED chip is 100 mm is from 15,067 (lx) (comparative example) to 6,496 (lx) (Example 1) or 7,153 (lx). ) (Example 2). As described above, in Examples 1 and 2, the range of illuminance when the distance from the LED chip was 50 mm or 100 mm was able to be reduced compared to the comparative example. Therefore, even when the plants grow and become taller, it is possible to supply the plants with light of uniform illuminance, and the yield of the plants can be improved.

It is also possible to appropriately combine the plurality of components disclosed in the above embodiments and modifications as necessary. Alternatively, some components may be deleted from all the components shown in the above embodiments and modifications.

10 LED lighting module 20 LED lighting sheet 20A 1st LED lighting sheet 20B 2nd LED lighting sheet 20C 3rd LED lighting sheet 20D 4th LED lighting sheet 20E 5th LED lighting sheet 20F 6th LED lighting sheet 21 LED chip 21A 1st LED chip 21B 2nd LED chip 21C 3rd LED chip 21D 4th LED chip 21E 5th LED chip 21F 6th LED chip 22 Metal wiring section 30 Flexible wiring board 31 Substrate film 32 Metal wiring section 33 Adhesive layer 34 Light reflective insulation protective film 35 Transparent protective film 36 Solder section 40 Control Section 41 Power input section 42 AC/DC converter 43 PWM control section 44A First connector 44B Second connector 45 Regulator 46 Power supply line 80 Plant growing shelf 81 Board 81A First board 81B Second board 81C Third board 81D Fourth Substrate 81E 5th substrate 81F 6th substrate 81G Columnar member 82 Support 83 Shelf board for plant growing shelf 83A LED lighting sheet assembly 84 Light blocking section 90 Plant growing factory 91 Building r rivet

Claims (13)

a support and
comprising a first LED lighting sheet for growing animals and plants and a second LED lighting sheet for growing animals and plants, which are attached to the support and arranged adjacent to each other,
The first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are arranged in multiple rows along a first arrangement direction, and a first LED lighting sheet perpendicular to the first arrangement direction. It has a plurality of LED chips arranged in multiple stages along the arrangement direction of 2,
An LED chip arranged on one stage of the first LED lighting sheet for growing animals and plants and located closest to the second LED lighting sheet for growing animals and plants in the first arrangement direction is a first LED chip,
An LED chip arranged on the first stage of the first LED lighting sheet for growing animals and plants and closest to the first LED chip is a second LED chip,
Among the plurality of LED chips of the second LED lighting sheet for growing animals and plants, the LED chip closest to the first LED chip of the first LED lighting sheet for growing animals and plants is a third LED chip,
The distance between the first LED chip and the second LED chip is A1,
When the distance between the first LED chip and the third LED chip is B1,
0.5×A1≦B1≦1.5×A1
Satisfying the relationship,
The first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants,
a substrate film;
a metal wiring portion formed on the surface of the substrate film;
further comprising a light reflective insulating protective film disposed to cover the metal wiring part,
The LED chip is mounted on the metal wiring part,
The light-reflective insulating protective film contains a white pigment , and has a light reflectance of 65% or more at a wavelength of 400 nm or more and 780 nm or less,
The LED chips of the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are each covered with a transparent protective film,
An LED lighting sheet assembly for a growing rack for animals and plants , wherein the transparent protective film has a thickness of 10 μm or more and 40 μm or less . When the LED chip that is arranged on the same stage as the third LED chip and is closest to the third LED chip is a fourth LED chip, and the distance between the third LED chip and the fourth LED chip is A2,
0.5×A2≦B1≦1.5×A2
The LED lighting sheet assembly for a growing rack for animals and plants according to claim 1, which further satisfies the following relationship. Ten or more of the LED chips of the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are arranged in series along the first arrangement direction, and these LED chips 3. The LED lighting sheet assembly for an animal and plant growing shelf according to claim 1, wherein four or more stages are arranged in parallel along the second arrangement direction. The first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants each include a substrate film and a metal wiring portion formed on the surface of the substrate film, and each of the plurality of LED lighting sheets 4. The LED lighting sheet assembly for an animal and plant growing shelf according to claim 1 , wherein a chip is mounted on the metal wiring section. The animal or plant according to any one of claims 1 to 4 , wherein the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants each have a thickness of 5 mm or less at the thickest part. LED lighting sheet assembly for growing shelves. The first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants include the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants. A control unit for supplying power is electrically connected, and the control unit is externally connected to the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants. The LED lighting sheet assembly for a growing rack for animals and plants according to any one of claims 1 to 5 . 7. The LED lighting sheet combination for an animal and plant growing shelf according to claim 6 , wherein a constant voltage is applied from the control unit to the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants. body. 8. The animal and plant growing device according to claim 6 , wherein the control unit is capable of controlling dimming of the LED chips of the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants. LED lighting sheet assembly for growing shelves. The animal or plant according to any one of claims 1 to 8 , wherein the first LED lighting sheet for growing animals and plants and the second LED lighting sheet for growing animals and plants are each attached to the support body with a rivet. LED lighting sheet assembly for growing shelves. Claim 1, wherein the support has a first support to which the first LED lighting sheet for growing animals and plants is attached, and a second support to which the second LED lighting sheet for growing animals and plants is attached. 10. The LED lighting sheet assembly for a shelf for growing animals and plants as described in any one of 9 to 9 . A rack for growing animals and plants,
The pillar and
An animal and plant growing shelf, comprising: an LED lighting sheet assembly for the animal and plant growing shelf according to any one of claims 1 to 10 , which is attached to the support. The animal and plant growing shelf according to claim 11 , wherein an LED lighting sheet for growing animals and plants is further arranged on a side surface of the LED lighting sheet assembly. building and
An animal and plant breeding factory, comprising: the animal and plant growing rack according to claim 11 or 12 , which is arranged inside the building.