阅读说明：本技术 植物栽培用光源 (Light source for plant cultivation ) 是由 马克·麦克克里尔 于 2020-05-20 设计创作，主要内容包括：植物栽培用光源包括分别射出第一光至第三光的第一光源至第三光源中的至少两个以上的光源,所述第一光在约400纳米至约500纳米之间具有第一峰,所述第二光在约400纳米至约500纳米之间具有第二峰,第二峰出现在比所述第一峰长的波长处,所述第三光在约400纳米至约500纳米之间具有第三峰,所述第三峰出现在比所述第一峰短的波长处,所述第一光具有约5000K的色温并在约500纳米至约700纳米之间具有第一子峰,所述第一子峰具有比所述第一峰低的强度并且具有比所述第一峰的半峰宽大的半峰宽。(The light source for plant cultivation includes at least two or more light sources among first to third light sources emitting first to third lights, respectively, the first light having a first peak between about 400 nm to about 500 nm, the second light having a second peak between about 400 nm to about 500 nm, the second peak occurring at a longer wavelength than the first peak, the third light having a third peak between about 400 nm to about 500 nm, the third peak occurring at a shorter wavelength than the first peak, the first light having a color temperature of about 5000K and having a first sub-peak between about 500 nm to about 700 nm, the first sub-peak having a lower intensity than the first peak and having a half-peak width larger than the half-peak width of the first peak.)

1. A light source for cultivating a plant is provided,

includes at least two light sources of first to third light sources for emitting first to third light, respectively,

the first light has a first peak between about 400 nanometers and about 500 nanometers,

the second light having a second peak between about 400 nanometers and about 500 nanometers, the second peak occurring at a longer wavelength than the first peak,

the third light having a third peak between about 400 nanometers and about 500 nanometers, the third peak occurring at a shorter wavelength than the first peak,

the first light has a color temperature of about 5000K and has a first sub-peak between about 500 nanometers to about 700 nanometers, the first sub-peak having a lower intensity than the first peak and having a half-peak width greater than the half-peak width of the first peak.

2. The light source for plant cultivation according to claim 1, wherein,

the overlapping area of the spectrum of the light emitted from the light source and the spectrum represented by the macrah curve is about 50% or more of the spectrum represented by the macrah curve.

3. The light source for plant cultivation according to claim 2, wherein,

the second light has a second sub-peak between about 500 nanometers and about 600 nanometers having a higher intensity than the first sub-peak.

4. The light source for plant cultivation according to claim 2, wherein,

the third light has a third sub-peak between about 500 nanometers and about 600 nanometers having a higher intensity than the first sub-peak.

5. The light source for plant cultivation according to claim 2, further comprising:

a fourth light source emitting fourth light having a fourth peak occurring between about 600 nanometers and about 700 nanometers.

6. The light source for plant cultivation according to claim 2, wherein,

the light source for plant cultivation includes the first light source and the second light source.

7. The light source for plant cultivation according to claim 2, wherein,

the light source for plant cultivation includes the second light source and the third light source.

8. The light source for plant cultivation according to claim 2, wherein,

the light source for plant cultivation includes the first to third light sources.

9. The light source for plant cultivation according to claim 8, wherein,

the overlapping area of the spectrum of the light mixing the first to third lights and the spectrum represented by the macrel curve is about 70% or more of the spectrum represented by the macrel curve.

10. The light source for plant cultivation according to claim 2, wherein,

at least one of the first to third light sources is provided in plurality.

11. A light source module for plant cultivation, comprising:

a light source that emits light in a visible light wavelength band;

a control unit that controls the light source; and

a power supply part supplying power to at least one of the light source and the control part,

wherein the light source includes at least two or more light sources among first to third light sources that emit first to third light, respectively,

the first light has a first peak between about 400 nanometers and about 500 nanometers,

the second light having a second peak between about 400 nanometers and about 500 nanometers, the second peak occurring at a longer wavelength than the first peak,

the third light having a third peak between about 400 nanometers and about 500 nanometers, the third peak occurring at a shorter wavelength than the first peak,

the first light having a color temperature of about 5000K and a fourth peak between about 500 nanometers to about 700 nanometers, the fourth peak having a lower intensity than the first peak and having a half-peak width greater than the half-peak width of the first peak,

the control unit controls at least one of the intensity of the light, the emission time of the light, the wavelength band of the light, and the number of times of emission of the light.

12. The light source module for plant cultivation according to claim 11,

the overlapping area of the spectrum of the light emitted from the light source and the spectrum represented by the macrah curve is about 70% or more of the spectrum represented by the macrah curve.

13. A plant growing apparatus comprising:

a light source module including at least two or more light sources of first to third light sources that emit first to third light, respectively; and

a housing in which plants are arranged and the light source module is installed,

wherein the first light has a first peak between about 400 nanometers and about 500 nanometers,

the second light having a second peak between about 400 nanometers and about 500 nanometers, the second peak occurring at a longer wavelength than the first peak,

the third light having a third peak between about 400 nanometers and about 500 nanometers, the third peak occurring at a shorter wavelength than the first peak,

the first light has a color temperature of about 5000K and has a first sub-peak between about 500 nanometers to about 700 nanometers, the first sub-peak having a lower intensity than the first peak and having a half-peak width greater than the half-peak width of the first peak.

14. A plant cultivation method comprises the following steps:

germinating the plant; and

providing light in the visible wavelength band to the germinated plant,

wherein the light of the visible light wavelength band includes at least two of first to fourth lights different in spectrum,

the first light has a first peak between about 400 nanometers and about 500 nanometers,

the second light having a second peak between about 400 nanometers and about 500 nanometers, the second peak occurring at a longer wavelength than the first peak,

the third light having a third peak between about 400 nanometers and about 500 nanometers, the third peak occurring at a shorter wavelength than the first peak,

the first light has a color temperature of about 5000K and a fourth peak between about 500 nanometers to about 700 nanometers, the fourth peak having a lower intensity than the first peak and having a half-peak width greater than the half-peak width of the first peak.

Technical Field

The present invention relates to a light source for plant cultivation, and more particularly, to a light source that emits light optimized for photosynthesis of a plant.

Background

As lighting devices for plant cultivation, various light sources have been developed and used instead of sunlight. Conventionally, incandescent lamps, fluorescent lamps, and the like have been mainly used as lighting fixtures for plant cultivation. However, the conventional lighting device for plant cultivation has a problem that light in a wavelength band required for photosynthesis of a plant cannot be appropriately supplied to the plant.

Recently, although LEDs are used as lighting devices for plant cultivation, there are problems such as having a spectrum limited to a specific wavelength, and consuming excessive energy and cost for supplying sufficient amount of light to plants.

Disclosure of Invention

Technical problem

The purpose of the present invention is to provide a light source for plant cultivation that provides light having a spectrum that is optimal for plant photosynthesis.

Technical scheme

According to an embodiment of the present invention, a light source for plant cultivation includes at least two or more light sources among first to third light sources emitting first to third lights, respectively, the first light having a first peak between about 400 nm to about 500 nm, the second light having a second peak between about 400 nm to about 500 nm, the second peak occurring at a wavelength longer than the first peak, wherein the third light having a third peak between about 400 nm to about 500 nm, wherein the third peak occurring at a wavelength shorter than the first peak, the first light having a color temperature of about 5000K and a first sub-peak between about 500 nm to about 700 nm, the first sub-peak having an intensity lower than the first peak and having a half-peak width larger than a half-peak width of the first peak.

In an embodiment of the present invention, an overlapping area of a spectrum of light emitted from the light source and a spectrum represented by a macrah curve may be about 50% or more of that represented by the macrah curve.

In an embodiment of the present invention, the second light may have a second sub-peak having a higher intensity than the first sub-peak between about 500 nm and about 600 nm.

In an embodiment of the present invention, the third light may have a third sub-peak having a higher intensity than the first sub-peak between about 500 nm and about 600 nm.

The light source according to an embodiment of the present invention may further include: a fourth light source emitting fourth light having a fourth peak occurring between about 600 nanometers and about 700 nanometers.

In an embodiment of the invention, at least one of the first to fourth light sources is provided in plurality.

According to an embodiment of the present invention, the light source may be a light source module for plant cultivation, the light source module for plant cultivation including: according to the light source of the above embodiment, light of a visible light wavelength band is emitted; a control unit that controls the light source; and a power supply unit for supplying power to at least one of the light source and the control unit.

According to an embodiment of the present invention, the light source may be applied to a plant cultivation device, the plant cultivation device including: the light source module according to the above embodiment; a housing in which the light source module is installed.

According to an embodiment of the present invention, the light source according to the above embodiment provides light to a plant, so that it can be used for plant cultivation.

Advantageous effects

According to an embodiment of the invention, light of a spectrum optimal for photosynthesis in a plant is provided. According to an embodiment of the present invention, the area of the spectrum of the mixed light overlapping the macbeth curve is increased to the maximum by mixing two or more of the first to fourth lights, so that the light efficiency is significantly increased. Accordingly, even if a small number of light sources are used, plant cultivation can be efficiently performed, and energy consumption and cost consumption corresponding to the energy consumption are reduced.

Drawings

Fig. 1 is a plan view illustrating a light source for plant cultivation according to an embodiment of the present invention.

Fig. 2 is a block diagram illustrating a light source module for plant cultivation according to an embodiment of the present invention.

Fig. 3a illustrates spectrums of lights emitted from the first and second light sources in the light source according to an embodiment of the present invention, and fig. 3b illustrates spectrums of mixed lights of the first and second light sources together with spectrums of macley curves.

Fig. 4 is a block diagram illustrating a light source module for plant cultivation according to an embodiment of the present invention.

Fig. 5a illustrates a spectrum of light from the light source for plant cultivation of fig. 4, and fig. 5b illustrates a spectrum of mixed light of the first light source and the third light source together with a spectrum of a maclein curve.

Fig. 6 is a block diagram illustrating a light source module for plant cultivation according to an embodiment of the present invention.

Fig. 7 illustrates a spectrum of light from the light source for plant cultivation of fig. 6.

Fig. 8 is a block diagram illustrating a light source module for plant cultivation according to an embodiment of the present invention.

Fig. 9a illustrates a spectrum of light from the light source for plant cultivation of fig. 8, and fig. 9b illustrates a spectrum of mixed light of the first to third light sources together with a spectrum of a maclein curve.

Fig. 10 is a block diagram illustrating a light source module for plant cultivation according to an embodiment of the present invention.

Fig. 11a illustrates a spectrum of light from the light source for plant cultivation of fig. 10, and fig. 11b illustrates a spectrum of mixed light of the second light source and the third light source together with a spectrum of a maclein curve.

Fig. 12 conceptually illustrates a cultivation device of the cultivation device according to an embodiment of the present invention.

Detailed Description

The present invention is capable of various modifications and of various forms, and specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. However, the present invention is not limited to the specific forms disclosed, and all modifications, equivalents, and alternatives included in the spirit and technical scope of the present invention are to be construed as being included therein.

In the description of the respective drawings, like reference numerals are used for like components. In the drawings, the size of the structure is shown enlarged compared to the actual size for clarity of the present invention. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be termed a second component, and similarly, a second component may be termed a first component, without departing from the scope of the present invention. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the present application, terms such as "including" or "having" are used to refer to the possibility of existence of the features, numbers, steps, operations, constituent elements, components or combinations thereof described in the specification, and do not preclude the existence or addition of one or more other features or numbers, steps, operations, constituent elements, components or combinations thereof in advance.

The invention relates to a light source used in plant cultivation.

Plants perform photosynthesis using light in a visible light wavelength band, and obtain energy through photosynthesis. Photosynthesis in plants does not proceed to the same extent in all wavelength bands. The light of the wavelength band of sunlight in which plants are used for photosynthesis, called Photosynthetically Active Radiation (PAR), occupies a part of the spectrum of sunlight, corresponding to a wavelength band of about 400 nm to about 700 nm.

A light source for plant cultivation according to an embodiment of the present invention is used to provide light optimal for photosynthesis of a plant.

Fig. 1 is a plan view illustrating a light source for plant cultivation according to an embodiment of the present invention, and fig. 2 is a block diagram illustrating a light source module for plant cultivation according to an embodiment of the present invention.

Referring to fig. 1 and 2, the light source module 100 for plant cultivation includes a light source 30 for emitting light required for a plant, a control unit 40 for controlling the light source 30, and a power supply unit 50 for supplying power to the light source 30 and/or the control unit 40. The light source 30 emits light in a visible light wavelength band, and includes a first light source 31 and a second light source 33 having spectral peaks at wavelengths different from each other.

The first light source 31 and the second light source 33 may be arranged on a substrate. The substrate may be a printed circuit substrate formed with wires, circuits, or the like to which the first and second light sources 31 and 33 can be directly attached, but is not limited thereto. The substrate is not particularly limited in shape or structure as long as the first light source 31 and the second light source 33 can be arranged, and may be omitted.

In an embodiment of the present invention, the control part 40 is connected to the first light source 31 and/or the second light source 33 to control whether the first light source 31 and the second light source 33 operate. The control part 40 may be connected to the first light source 31 and/or the second light source 33 in a wired or wireless manner. The control part 40 may be connected with a power supply part 50 that supplies power to the control part 40. The power supply part 50 may supply power to the light source through the control part 40 or directly connected to the light source.

The control unit 40 may control on/off of the first light source 31 and/or the second light source 33 so that the first light source 31 and the second light source 33 emit light to a predetermined section at a predetermined intensity. The first light source 31 and the second light source 33 may be individually operated to allow the plant to be efficiently photosynthetic to the maximum extent. The controller 40 may independently control the emission intensity, emission time, and the like of the first light L1 and the second light L2. Also, where first light source 31 and/or second light source 33 include a plurality of light emitting diodes, individual light emitting diodes may be independently controlled.

In an embodiment of the invention, when the first light source 31 and the second light source 33 include a plurality of light emitting diodes, the composition ratio of the light emitting diodes can be variously changed. For example, the number of the second light sources 33 may be set to be smaller or greater than the first light sources 31. The number of the light emitting diodes in the first light source 31 and the second light source 33 may be determined according to the type of the plant, and for example, the composition ratio may be changed according to the ratio of cryptochrome (cryptochrome) as a green light receptor to phytochrome (phytochrome) as a red light receptor. Accordingly, the light emitting diodes provided in the first light source 31 and the second light source 33 can provide light irradiation of a matching type in accordance with the type of the plant. Accordingly, even with a small amount of electric power, the plant can grow faster and more vigorously.

Also, the control part 40 may control the operations of the first and second light sources 31 and 33 according to a preset process or according to an input of a user. The operation of the first light source 31 and the second light source 33 may be variously changed according to the kind of plant, the growth period of the plant, and the like.

According to an embodiment of the present invention, when a light source for plant cultivation is used, even under conditions where sunlight is insufficient or unavailable, it is possible to independently provide a growing environment suitable for the type of plant. Further, a large amount of plants having improved photosynthetic capacity can be easily cultivated.

Fig. 3a illustrates spectrums of light emitted from the first and second light sources 31 and 33 in the light source according to an embodiment of the present invention, and fig. 3b illustrates spectrums of mixed light of the first and second light sources 31 and 33 together with spectrums of macbeth curves.

Referring to fig. 3a and 3b, the first light source 31 emits first light L1 in the first wavelength band, and the second light source 33 emits second light L2 in the second wavelength band.

Both the first light source 31 and the second light source 33 emit light in a wavelength band for photosynthesis. The wavelength band for photosynthesis is between about 400 nanometers and about 700 nanometers. The light source according to an embodiment of the present invention provides light to a plant with a plant lighting efficiency (plant lighting efficiency) of 3.1 μmols/J or more.

The first light L1 is a light having a color temperature corresponding to about 5000K, and has a first peak P1 between about 400 nm and about 500 nm and a first sub-peak P1' between about 500 nm and about 700 nm. The first peak P1 may occur between about 400 nanometers and about 470 nanometers, for example, between about 430 nanometers and about 460 nanometers. The first sub-peak P1' may occur between about 540 nanometers and about 600 nanometers.

The first peak P1 has the strongest intensity within the spectrum of the first light L1, and the first sub-peak P1' has a lower intensity than the first peak P1. The half-width of the first peak P1 is smaller than the half-width of the first sub-peak P1'.

The second light L2 has a second peak P2 between about 400 nm and about 500 nm and a second sub-peak P2' between about 500 nm and about 700 nm. The second peak P2 may occur between about 450 nanometers and about 500 nanometers, for example, may occur at about 480 nanometers. The second sub-peak P2' may occur between about 540 nanometers and about 610 nanometers.

The second peak P2 has the strongest intensity in the spectrum of the second light L2, and the second sub-peak P2' has a lower intensity than the second peak P2. The half-width of the second peak P2 is smaller than the half-width of the second sub-peak P2'.

The second peak P2 appears at a longer wavelength than the first peak P1, and the second sub-peak P2 'appears at a wavelength band similar to that of the second sub-peak P2'. The intensities of the first and second peaks P1 and P2 may be similar intensities. The first peak P1 and the second peak P2 are regions corresponding to blue light. In the present embodiment, since the first peak P1 and the second peak P2 do not occur at the same wavelength as each other, it is prevented that excessively high intensity of blue light is provided to the plant when the first light L1 and the second light L2 are combined.

The second sub-peak P2 'may be emitted with a higher intensity than the first sub-peak P1', and at this time, the height of the second sub-peak P2 'may be higher than that of the first sub-peak P1'. The second sub-peak P2' corresponds to a wavelength band from green to a portion of yellow and red. Wavelength bands relatively effective for photosynthesis correspond to blue and red, but a wavelength band of visible light having a different color between blue and red can also affect photosynthesis. For example, various pigments within a plant such as carotenoids can disperse light by absorbing light of a wavelength band that chlorophyll does not absorb, thereby preventing chlorophyll from being damaged. Furthermore, the absorption spectrum of chlorophyll does not completely match the action spectrum of leaves, and some photosynthesis occurs even in green light where chlorophyll hardly absorbs. In an embodiment of the present invention, the photosynthesis efficiency of the plants with respect to various lights can be improved by enhancing the spectrum corresponding to the colors from green to red through the second sub-peak P2' of the second light L2.

The spectrum of the first light L1 has a valley between the first peak P1 and the first sub-peak P1', and the spectrum of the second light L2 has a valley between the second peak P2 and the second sub-peak. In the spectrum of the first light L1 and the spectrum of the second light L2, the positions of the two valleys do not coincide, and therefore, when the two lights are combined, a sufficient degree of light can be provided to the plant even in the region corresponding to the valley.

The light source of the present invention emits light having a spectrum whose area overlaps 50% or more with a spectrum called a maccree curve (mccere curve) by a combination of the first light L1 and the second light L2. The spectrum of the makrey curve shows light corresponding to the wavelength range required for optimal growth of the plant.

Observing the makrey curve MC, the wavelength band of light required for photosynthesis of plants is uniformly distributed in about 400 nm to about 700 nm wavelength band. Accordingly, even in the case of using artificial illumination such as an LED, it is required to provide light having a wavelength of uniform intensity in a wavelength band of about 400 nm to about 700 nm.

In conventional lighting for plants, in the case of an LED, light of a single wavelength band having a narrow half-value width is generally provided at high intensity, not light of the entire wavelength band. For example, in many conventional plant lighting, a red light source and a blue light source that emit about 660 nm red light and about 450 nm blue light, which are considered to be mainly used for photosynthesis, are used. Alternatively, in the case of conventional lighting for plants, white light sources having color temperatures of about 5000K and 3000K are mainly mixed and used, and a light source in a red wavelength band is additionally used. However, in the case of the lighting for plants according to the conventional invention, there is a problem that it is difficult to supply photons to plants in the entire wavelength band corresponding to the maclein curve, and as a result, the photosynthesis efficiency is not high.

The illumination according to an embodiment of the present invention provides light maximally conforming to a makrey curve using illuminations having spectra different from each other, and particularly, provides a light source emitting light having a spectrum with an area overlapping ratio of 50% or more or 70% or more.

In an embodiment of the present invention, the light sources may be implemented in various forms, for example, may be implemented as light emitting diodes, respectively.

In an embodiment of the invention, the spectrum of the light source for providing light conforming to the makrey curve may be set differently from the above-described embodiment.

Fig. 4 is a block diagram illustrating the light source module 100 for plant cultivation according to an embodiment of the present invention.

Fig. 5a illustrates a spectrum of light from the light source for plant cultivation of fig. 4, and fig. 5b illustrates a spectrum of mixed light of the first light source and the third light source together with a spectrum of a maclein curve.

Referring to fig. 4, 5a and 5b, a light source module 100 for plant cultivation according to an embodiment of the present invention includes a light source 30 including a first light source 31 and a third light source 35, a control part 40, and a power supply part 50.

In the present embodiment, the first light source 31 and the third light source 35 both emit light in a wavelength band for photosynthesis. The first light source 31 emits first light L1, and the third light source 35 emits third light L3.

The first light L1 is a light having a color temperature corresponding to about 5000K, and has a first peak P1 between about 400 nm and about 500 nm and a first sub-peak P1' between about 500 nm and about 700 nm. The first peak P1 may occur between about 400 nanometers and about 470 nanometers, for example, between about 430 nanometers and about 460 nanometers. The first sub-peak P1' may occur between about 540 nanometers and about 600 nanometers.

The first peak P1 has the strongest intensity within the spectrum of the first light L1, and the first sub-peak P1' has a lower intensity than the first peak P1. The half-width of the first peak P1 is smaller than the half-width of the first sub-peak P1'.

The third light L3 has a third peak P3 between about 400 nm and about 500 nm and a third sub-peak P3' between about 500 nm and about 700 nm. The third peak P3 may occur between about 400 nanometers and about 460 nanometers, for example, may occur at about 410 nanometers. The third sub-peak P3' may occur between about 500 nanometers and about 550 nanometers.

The third peak P3 has the strongest intensity in the spectrum of the third light L3, and the third sub-peak P3' has a lower intensity than the third peak P3. The half-width of the third peak P3 is smaller than the half-width of the third sub-peak P3'.

The third peak P3 appears at a shorter wavelength than the first peak P1, and the third sub-peak P3 'appears at a similar wavelength band to the first sub-peak P3'. The intensities of the first and third peaks P1 and P3 may be similar intensities.

In the present embodiment, since the first peak P1 and the third peak P3 do not occur at the same wavelength as each other, it is prevented that excessively high intensity of blue light is provided to the plant when the first light L1 and the third peak P3 are combined.

The third sub-peak P3 'may be emitted with a higher intensity than the first sub-peak P1', and at this time, the height of the third sub-peak P3 'may be higher than that of the first sub-peak P1'.

The third sub-peak P3' corresponds to a wavelength band from green to yellow, but is closer to the wavelength band of green. The photosynthesis efficiency of the plants with respect to various lights can be improved by enhancing the spectrum corresponding to green to yellow by the third sub-peak P3' of the third light L3.

The spectrum of the first light L1 has a valley between the first peak P1 and the first sub-peak P1', and the spectrum of the third light L3 has a valley between the third peak P3 and the third sub-peak. In the spectrum of the first light L1 and the spectrum of the third light L3, the positions of the two valleys do not coincide, and therefore, when the two lights are combined, a sufficient degree of light can be provided to the plant even in the region corresponding to the valley.

The illumination according to an embodiment of the present invention provides light maximally conforming to a makrey curve using illuminations having spectra different from each other, and particularly, provides light of a spectrum having an area overlapping rate of 50% or more or 70% or more with the makrey curve.

In an embodiment of the present invention, the spectrum of the light source for providing light conforming to the makrey curve may be set differently from the above-described embodiment, and light sources of other wavelengths may be additionally combined.

Fig. 6 is a block diagram illustrating the light source module 100 for plant cultivation according to an embodiment of the present invention.

Fig. 7 illustrates a spectrum of light from the light source for plant cultivation of fig. 6.

Referring to fig. 6 and 7, the light source for plant cultivation according to the embodiment of the present invention includes a first light source 31, a second light source 33, a fourth light source 37, a control unit 40, and a power supply unit 50.

The first light source 31 and the second light source 33 may be substantially the same light source as the first light source 31 and the second light source 33 shown in fig. 2 and 3.

According to the present embodiment, the fourth light source 37 emits fourth light L4 having a fourth peak P4 occurring between about 600 nanometers and about 700 nanometers. The peak of the fourth light L4 is located at a wavelength band corresponding to red. By the fourth light L4 from the fourth light source 37, the light corresponding to the red color is enhanced in the entire spectrum, so that the photosynthesis efficiency of the plant with respect to various lights can be improved. The fourth light source 37 may have a peak at about 640 nanometers to about 680 nanometers, and for example, may have a fourth peak P4 at 660 nanometers.

Fig. 8 is a block diagram illustrating the light source module 100 for plant cultivation according to an embodiment of the present invention.

Fig. 9a illustrates a spectrum of light from the light source for plant cultivation of fig. 8, and fig. 9b illustrates a spectrum of mixed light of the first to third light sources together with a spectrum of a maclein curve.

Referring to fig. 8, 9a and 9b, a light source module 100 for plant cultivation according to an embodiment of the present invention includes a first light source 31, a third light source 35, a fourth light source 37, a control unit 40 and a power supply unit 50.

The first light source 31 and the third light source 33 may be substantially the same light source as the first light source 31 and the third light source 35 shown in fig. 2 and 4.

According to the present embodiment, the fourth light source 37 emits fourth light L4 having a fourth peak P4 occurring between about 600 nanometers and about 700 nanometers. The peak of the fourth light L4 is located at a wavelength band corresponding to red. By the fourth light L4 from the fourth light source 37, the light corresponding to the red color is enhanced in the entire spectrum, so that the photosynthesis efficiency of the plant with respect to various lights can be improved. The fourth light source 37 may have a peak at about 640 nanometers to about 680 nanometers, and for example, may have a fourth peak P4 at 660 nanometers.

The illumination according to an embodiment of the present invention provides light maximally conforming to a makrey curve using illuminations having spectra different from each other, and particularly, provides light having a spectrum with an area overlapping rate of 50% or more, or 70% or more, or 80% or more with the makrey curve.

Fig. 10 is a block diagram illustrating the light source module 100 for plant cultivation according to an embodiment of the present invention.

Fig. 11a illustrates a spectrum of light from the light source for plant cultivation of fig. 10, and fig. 11b illustrates a spectrum of mixed light of the second light source to the third light source together with a spectrum of a maclein curve.

Referring to fig. 10, 11a and 11b, the light source module for plant cultivation according to an embodiment of the present invention includes a second light source 33, a third light source 35, a fourth light source 37, a control unit 40, and a power supply unit 50.

The second light source 33 and the third light source 35 may be substantially the same light source as the second light source 33 and the third light source 35 shown in fig. 2 and 4.

The illumination according to an embodiment of the present invention provides light maximally conforming to a makrey curve using illuminations having spectra different from each other, and particularly, provides light of a spectrum having an area overlapping rate of 50% or more or 70% or more with the makrey curve.

As described above, the light source according to an embodiment of the present invention may be combined in various forms, and the combination form is not limited to the above form. For example, the light source according to an embodiment of the present invention may include at least two of the first to third light sources, or may also include at least three of the first to fourth light sources. For example, the light source may include all of the first to fourth light sources. Alternatively, the light source may include the first light source, the third light source, and the fourth light source. In the case of combining two or more light sources of the first to fourth light sources, the overlapping area of the spectrum of light emitted from the light sources and the spectrum represented by the macrah curve may be about 70% or more of the spectrum represented by the macrah curve. As described above, by mixing two or more of the first to fourth lights, the area where the spectrum of the mixed light overlaps the macbeth curve is increased to the maximum, and the light efficiency can be increased to 3.1 μmol/J or more. Accordingly, even if a small number of light sources are used, plant cultivation can be efficiently performed, and energy consumption and cost consumption corresponding to the energy consumption are reduced.

In this embodiment, at least one of the first to fourth light sources may be configured with a plurality of light emitting elements.

The light source according to an embodiment of the present invention may be used for plant cultivation, may be applied to a plant cultivation apparatus provided with a light source, a greenhouse, and the like.

Fig. 12 is a cultivation apparatus conceptually illustrating a cultivation apparatus according to an embodiment of the present invention. The cultivation apparatus shown in fig. 11 illustrates a small-sized cultivation apparatus as an example, but is not limited thereto.

Referring to fig. 12, a cultivation apparatus 100' according to an embodiment of the present invention includes a housing 60 having an inner space in which plants can be planted, and a light source 30 disposed in the housing 60 and emitting light.

The housing 60 is provided with a vacant space inside, and plants can be placed and grown in the vacant space. The housing 60 may be provided in a box shape capable of blocking external light. In an embodiment of the present invention, the housing 60 may include a lower case 61 opened to an upper direction and an upper case 63 opened to a lower direction. The lower case 61 and the upper case 63 may be fastened in a box shape blocking external light.

The lower case 61 includes a bottom portion and side wall portions extending upward from the bottom portion. The upper case 63 includes a lid portion and a side wall portion extending downward from the lid portion. The side wall portions of the lower case 61 and the upper case 63 may have a structure that fits and is fastened to each other. The lower case 61 and the upper case 63 may be fastened to or separated from each other according to the user's intention, and thus the user may open or close the case 60.

The housing 60 may be provided in a variety of shapes. For example, it may have a substantially rectangular parallelepiped shape, or may have a cylindrical shape. However, the shape of the housing 60 is not limited thereto, and may be provided in a shape different therefrom.

The housing 60 provides an environment within which plants provided therein can grow. The housing 60 may be sized to accommodate a plurality of plants even in situations where multiple plants are provided for growth. Also, the size of the housing 60 may be different according to the use of the plant-cultivating device 100'. For example, in the case where the plant-growing apparatus 100' is used for small-scale plant growing for use in homes, the size of the housing 60 may be relatively small. In the case where the plant-cultivating device 100' is used to commercially cultivate plants and sell them, the size of the housing 60 may be relatively large.

In one embodiment of the present invention, the housing 60 may block light so that light outside the housing 60 does not flow into the interior of the housing 60. Accordingly, the interior of the housing 60 may provide a dark room environment isolated from the exterior. Accordingly, it is possible to prevent the outside light from being unnecessarily irradiated to the plants provided inside the housing 60. In particular, the housing 60 may prevent external visible light from being irradiated to the plants. However, the housing 60 may be designed such that a portion thereof can be opened to directly receive external light, depending on the case.

In the present embodiment, the space inside the housing 60 may be provided as one. However, this is merely for convenience of explanation, and may be divided into a plurality of regions. That is, a partition wall that divides the space in the casing 60 into a plurality of parts may be provided in the casing 60.

The light source provides light to the plants within the housing 60. The light source is disposed on the inner surface of the upper case 63 or the lower case 61. In an embodiment of the present invention, the light source may be disposed on the cover portion of the upper case 63. In the present embodiment, as an example, a case where the light source is provided on the inner surface of the cover portion of the upper case 63 is illustrated, but is not limited thereto. For example, in another embodiment of the present invention, the light source may be disposed on a sidewall portion of the upper case 63. Alternatively, in another embodiment of the present invention, the light source may be disposed on a side wall portion of the lower case 61, for example, may also be disposed on an upper end of the side wall portion. Alternatively, in another embodiment of the present invention, the light source may be provided at least one of the cover portion of the upper case 63, the side wall portion of the upper case 63, and the side wall portion of the lower case 61.

A cultivation table 70 may be provided in a space inside the case 60 to easily cultivate plants, for example, to easily perform hydroponic cultivation. The cultivation table 70 may be configured by a plate-like plate 71 arranged spaced apart from the bottom of the housing 60 in the upper direction. The plate 71 may be provided with a through hole 73 having a predetermined size. The cultivation table 70 is used for placing and growing plants on the upper surface of the plate 71, and may have a plurality of through holes 73 so that supplied water can be discharged when supplied. The through-holes 73 may be provided in a size such that the plants do not fall down. For example, the diameter of the through-hole 73 may have a size smaller than that of the plant. The space between the cultivation table 70 and the bottom of the lower case 61 may function as a water tank for storing the drained water. Accordingly, water drained to the lower portion through the through-holes 73 of the cultivation table 70 can be stored in a space between the bottom of the lower case 61 and the cultivation table 70.

However, according to an embodiment of the present invention, the rice plant may be cultivated by a method other than hydroponic cultivation, and in this case, water, a culture medium, soil, etc. may be provided in the space inside the housing 60 so that water and/or nutrients required for the rice plant can be supplied, and in this case, the housing 60 may function as a container (container). The medium, soil, or the like may contain nutrients capable of growing plants, such as potassium (K), calcium (Ca), magnesium (Mg), sodium (Na), iron (Fe), or the like. The plants may be disposed in a form buried in the culture medium or disposed on the surface of the culture medium according to the kind of the plants.

The size and shape of the cultivation base 70 may be changed according to the shape of the housing 60 and the arrangement of the first and second light sources. The size and shape of the cultivation base 70 may be configured such that the plant set on the cultivation base 70 is within the irradiation range of the light irradiated from the first light source and the second light source.

A moisture supply device for supplying moisture to the plants may be provided in the housing 60. The moisture supply means may be provided on an upper end of the case 60 (e.g., on an inner surface of the cover of the upper case 63) so as to spray water onto the cultivation table 70 of the case 60. However, the form of the moisture supply device is not limited to the above, and may be changed according to the shape of the housing 60 and the arrangement form of the cultivation tables 70. Also, the user may directly supply moisture into the case 60 without a separate moisture supply device.

The moisture supply means may be provided in one or more. The number of the moisture supplying means may be changed according to the size of the housing. For example, in the case of a relatively small-sized plant cultivation device for home use, since the size of the housing is small, the moisture supply device may be provided as one. In contrast, in the case of a commercial plant cultivation device of a relatively large size, the moisture supply device may be provided in plurality because the size of the housing is large. However, the number of the moisture supplying means is not limited thereto, and may be set in various numbers at various positions.

The moisture supply means may be connected to a water tank provided to the housing 60 or a water stopper provided outside the housing 60. Also, the moisture supplying means may further include a filtering means so that the contaminant matter floating in the water is not supplied to the plants. The filter means may comprise a filter of activated carbon, non-woven fabric or the like, whereby the water passing through the filter means may be purified water. In some cases, the filtering apparatus may further include a light irradiation filter that irradiates ultraviolet rays or the like to the water to remove bacteria, germs, mold spores, and the like present in the water. Since the water supply device includes the above-described filter device, there is no fear of contamination of the inside of the housing 60 and plants even in the case where water is reused or rainwater or the like is directly used for cultivation.

The water supplied from the water supply device may be supplied as water itself (e.g., purified water) without additional nutrients, but is not limited thereto and may include nutrients required for plant growth. For example, the water may contain potassium (K), calcium (Ca), magnesium (Mg), sodium (Na), iron (Fe), and the like, or Nitrate (Nitrate), Phosphate (phospate), Sulfate (Sulfate), chloride (Cl), and the like. For example, Sachs liquid, Knop liquid, Hoagland liquid, Hewitt liquid, etc. may be supplied from the water supply device.

According to an embodiment of the present invention, the light source may be used to grow plants.

A plant cultivation method according to an embodiment of the present invention may include a step of germinating a plant and a step of providing light of a visible light wavelength band to the germinated plant. The light provided to the plant is the light emitted from the light source according to the above embodiment, and the light of the visible light wavelength band may include at least two or three of the first to fourth lights having different spectra.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that various modifications and alterations can be made by those skilled in the art or those having the basic knowledge in the art without departing from the spirit and scope of the present invention as set forth in the claims.

Therefore, the technical scope of the present invention is not limited to the details described in the detailed description, but should be determined only by the scope described in the claims.