WO2014125714A1 - 植物栽培用led光源 - Google Patents
植物栽培用led光源 Download PDFInfo
- Publication number
- WO2014125714A1 WO2014125714A1 PCT/JP2013/083213 JP2013083213W WO2014125714A1 WO 2014125714 A1 WO2014125714 A1 WO 2014125714A1 JP 2013083213 W JP2013083213 W JP 2013083213W WO 2014125714 A1 WO2014125714 A1 WO 2014125714A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- led
- light
- blue
- plant cultivation
- light source
- Prior art date
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
- A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
- H10H20/8512—Wavelength conversion materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
- H10H20/8512—Wavelength conversion materials
- H10H20/8513—Wavelength conversion materials having two or more wavelength conversion materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8514—Wavelength conversion means characterised by their shape, e.g. plate or foil
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
- H01L25/03—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10H20/00
- H01L25/0753—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10H20/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
Definitions
- the present invention relates to an LED light source for plant cultivation that emits light absorbed by a plant that needs light for growth in order to perform photosynthesis.
- Patent Documents 1 to 5 are known as light emitting devices using LEDs (Light Emitting Diodes).
- a light-emitting device using an LED disclosed in Patent Document 1 is coated with a blue light-emitting element that emits blue light and is excited by the blue light to emit monochromatic light other than blue light.
- a phosphor layer including a phosphor is provided. It has a spectral spectrum in which the emission intensity at the peak wavelength of the blue light is 35% or less of the emission intensity at the peak wavelength of the phosphor.
- At least one of the plurality of LEDs is disposed adjacent to another LED, and at least one of the plurality of LEDs has a half value greater than 50 nm. It generates radiation having the full width.
- the full width at half maximum refers to a wavelength range in which the LED emits light at 50% of the maximum radiation power.
- the light emitting device disclosed in Patent Document 3 includes a first semiconductor light emitting element having a short main light emission wavelength, a main light emission wavelength longer than the main light emission wavelength of the first semiconductor light emitting element, and the first semiconductor. And a color conversion member containing a phosphor that absorbs light emitted from the light emitting element and the first semiconductor light emitting element and emits visible light having a longer wavelength than the light emitted.
- the LED device 100 disclosed in Patent Document 4 encloses a wiring board 101, one or more LED elements 102 arranged on the wiring board 101, and the LED elements 102.
- the resin body 110 is stopped.
- the resin body 110 is surrounded by the first resin body 111 formed on the wiring board 101 so as to surround the LED element 102 without contacting the LED element 102 and the first resin body 111 on the wiring board 101.
- a second resin body 112 formed so as to cover the LED element 102 on the broken region.
- the phosphor 103 is mixed in the second resin body 112.
- the LED module 201 is mounted on the substrate 202 as shown in FIGS.
- the substrate 202 is fixed to a heat sink body 210 having a shape in which a plurality of fins 212 made of a good heat conductor metal or a carbon material are arranged via a heat conductive resin 211.
- the heat sink 200 used for cooling the high-intensity LED module of 1 W or more is provided.
- any of the light emitting devices described in the above-mentioned conventional patent documents 1 to 5 is a light emitting device for plant cultivation.
- the light emission intensity of blue light is used to be a ratio of 35% or less of the light emission intensity of red light.
- LEDs are used by mixing red and blue, but depending on the plant, it is also possible to use red alone.
- the red LED chip emits light with high brightness (increases the drive current).
- B Increase the number of LED chips to be mounted.
- C Increase the number of red LED chips.
- the present invention has been made in view of the above-described conventional problems, and its purpose is to easily adjust the light quantity ratio of the blue region and the red region with a simple configuration without increasing the installation area, and It is providing the LED light source for plant cultivation which can increase the extraction efficiency of light.
- an LED light source for plant cultivation includes a substrate, at least one blue LED chip that is mounted on the substrate and emits blue light, and the blue LED chip.
- a red phosphor-mixed resin in which a red phosphor that emits red light with excitation light from the blue LED chip is dispersed or settled, and a transparent silicone resin that covers the red phosphor-mixed resin is provided. It is characterized by having.
- the light quantity ratio between the blue region and the red region can be easily adjusted with a simple configuration without increasing the installation area, and the light extraction efficiency can be increased. There exists an effect of providing the LED light source for plant cultivation to obtain.
- FIG. 1 It is sectional drawing which shows the structure of the LED light source for plant cultivation in Embodiment 1 of this invention. It is a side view which shows the structure of the LED light source for plant cultivation which mounted the some LED package on the mounting board
- (b) is the said plant cultivation.
- It is a graph which shows the light emission spectrum when the compounding ratio of the red fluorescent substance mixing resin is set to resin: red fluorescent substance 1: 0.20 in the LED light source for use.
- It is a graph which shows the temperature characteristic of the LED package in the said LED light source for plant cultivation in comparison with the past.
- FIG. (A) is sectional drawing which shows the structure of the LED light source for plant cultivation in Embodiment 2 of this invention
- (b) is the structure of the said LED light source for plant cultivation except red fluorescent substance mixing resin and silicone resin.
- FIG. (A) is a side view showing a configuration of the LED light source for plant cultivation in which a plurality of LED packages are mounted and curved on a substrate made of a film-like base material on a mounting substrate made of a film-like base material
- (A) is a perspective view which shows the structure of the said LED light source for plant cultivation which arrange
- (b) is the said which arranged the several LED package on the rectangular mounting board
- (A) is a top view which shows the structure of the said LED light source for plant cultivation arrange
- (b) is electrically connecting several blue LED chips to a board
- FIG. It is sectional drawing which shows the structure of the light-emitting device using conventional LED.
- (A) is sectional drawing which shows the structure of the light-emitting device using other conventional LED,
- (b) is a perspective view which shows the structure of the said light-emitting device.
- FIG. 1 is a cross-sectional view showing a configuration of a plant cultivation LED light source according to the present embodiment.
- the LED light source 1A for plant cultivation of the present embodiment has at least one blue LED (Light Emitting Diode) chip 11 mounted on a substrate 2A.
- a red phosphor mixed resin 12 in which a red phosphor 12 a is dispersed or settled is provided so as to cover the blue LED chip 11.
- a transparent silicone resin 13 is provided so as to cover the red phosphor mixed resin 12. Therefore, LED light source 1A for plant cultivation of this embodiment has LED package 10 in which blue LED chip 11 is double-sealed with red phosphor-mixed resin 12 and silicone resin 13 on substrate 2A. ing.
- FIG. 1 Light Emitting Diode
- the substrate 2A is made of, for example, a ceramic base material. Thereby, the board
- the electrodes 2 and 3 are provided on the back surface of the substrate 2A. Therefore, the blue LED chip 11 mounted on the substrate 2A is connected to the electrodes 3 and 3 through through electrodes (not shown) in order to supply electric power. However, the electrodes 3 and 3 may be formed on the side surface of the substrate 2A.
- the red phosphor mixed resin 12 in which the red phosphor 12a is dispersed or settled is provided so as to cover the blue LED chip 11.
- the resin 12b in which the red phosphor 12a is dispersed or settled in the red phosphor-mixed resin 12 is made of a transparent silicone resin.
- the blue LED chip 11 generates blue light having an emission peak wavelength of 400 nm to 480 nm corresponding to the blue region absorption peak of chlorophyll.
- the red phosphor 12a absorbs the blue light of the blue LED chip 11 and emits red light having an emission peak wavelength of 620 to 700 nm corresponding to the red region absorption peak of chlorophyll.
- the blue LED chip 11 may output not only the emission peak wavelength of 400 nm to 480 nm corresponding to the blue region absorption peak of chlorophyll but also the blue ultraviolet region including the ultraviolet color.
- a transparent silicone resin 13 covering the red phosphor-containing resin 12 is provided in a dome shape.
- the silicone resin 13 acts as a lens, the light can be converged in a certain direction by the refractive action of the silicone resin 13 that is a lens.
- the light emitted from the blue LED chip 11 and the red phosphor-containing resin 12 can be further distant, so that the amount of light irradiated to distant plants can be increased, and the light extraction is consequently performed. Efficiency can be increased. Therefore, the LED light source 1A for plant cultivation that can increase the light extraction efficiency can be provided.
- the red phosphor-mixed resin 12 is used in the LED package 10 in which the blue LED chip 11 is double-sealed with the red phosphor-mixed resin 12 and the silicone resin 13 in the plant cultivation LED light source 1A of the present embodiment.
- the silicone resin 13 is formed in a dome shape. Thereby, the emitted light can be uniformly emitted radially in a high range. That is, when the side wall of the plant cultivation LED light source 1 ⁇ / b> A exists, no light is emitted from the side surface of the blue LED chip 11. However, when the red phosphor mixed resin 12 and the silicone resin 13 are in a dome shape, light can be emitted to the side surface of the LED package 10. As a result, as shown in FIG. 2, when a plurality of LED packages 10 are arranged on the mounting substrate 6, the entire upper surface of the mounting substrate 6 functions as a planar light source that emits uniform light.
- the red phosphor-mixed resin 12 in each LED package 10 is formed by dispersing or sedimenting the red phosphor 12a on a resin 12b made of a silicone resin. Therefore, by changing the ratio of the red phosphor 12a to the resin 12b in the LED package 10, light having different wavelengths can be emitted.
- CaAlSiN 3 : Eu is used as the red phosphor 12a, and light having an emission peak in the wavelength range of 400 to 480 nm is emitted from the blue LED chip 11 as described above. As a result, blue light having a wavelength of 400 to 480 nm and red light having a wavelength of 620 to 700 nm are emitted.
- CaAlSiN 3 : Eu is a nitride red phosphor using divalent europium (Eu) as an activator, and is one of phosphors having stable temperature characteristics and high luminous efficiency.
- the emission intensity is 1.0 at a wavelength of 440 nm. And a spectrum having a peak wavelength with a light emission intensity of 0.3 at a wavelength of 640 nm.
- the peak wavelength of emission intensity 1.0 at a wavelength of 440 nm.
- the peak wavelength of emission intensity 0.4 at a wavelength of 440 nm.
- FIG. 5 is a diagram illustrating an absorption spectrum of chlorophyll and an application example of each LED package in the LED light source for plant cultivation according to the present embodiment.
- chlorophyll which plays a central role in plant photosynthesis, does not absorb light uniformly. That is, chlorophyll (chlorophyll) shows clear absorption peaks around red 660 nm and blue 450 nm as shown in FIG. Therefore, in this connection, the wavelength characteristic of photosynthesis has a first peak near 660 nm and a second peak near 450 nm.
- blue light near 450 nm also affects a photoreaction system called a high energy reaction system of plants, and is indispensable for the healthy morphogenesis of plants. For this reason, at the stage of germination and seedling raising, the importance of the component of blue light increases.
- the LED package 10A of the present embodiment is suitable for the blue region absorption band of chlorophyll. It turns out that LED package 10D of this Embodiment is suitable for the red region absorption band of chlorophyll.
- the LED package 10 of the plant cultivation LED light source 1A of the present embodiment it is possible to easily match the light absorption characteristics of chlorophyll only by changing the blending ratio of the resin 12b and the red phosphor 12a. I understand.
- photon flux density is used as a unit of light quantity.
- the photon flux density refers to a value obtained by dividing the number of photons irradiated in one second by the light receiving area of the material when a certain material is irradiated with solar light.
- the photon flux density since the number of photons is counted, one is one regardless of whether infrared light or ultraviolet light comes.
- the photochemical reaction is triggered only when photons that can be absorbed by the dye come. For example, in the case of plants, no matter how much light is not absorbed by chlorophyll, it is the same as it does not exist.
- the photosynthetic photon flux is a photosynthetic photon flux density (PPFD) multiplied by a light irradiation area.
- PPFD photosynthetic photon flux density
- This value is not simply a value expressed by the energy of the absorption peak wavelength in the red region and blue region of chlorophyll, but corresponds to each absorption spectrum in the red region and blue region in order to obtain the light intensity necessary for plant growth. It is a value that expresses energy (that is, energy required for photosynthesis) by the amount of photons.
- the photosynthetic photon flux can be obtained from the spectral characteristics from the LED light source and the energy of one photon of each wavelength.
- the photosynthesis photon flux is 1 ⁇ mol / s in the blue region having a wavelength of 400 nm to 480 nm. Yes. In the red region with a wavelength of 620 nm to 700 nm, it is 1.3 ⁇ mol / s. This value is obtained from the area of wavelengths 400 nm to 480 nm and wavelengths 620 nm to 700 nm.
- the ratio of the photosynthetic photon flux in the blue region with a wavelength of 400 nm to 480 nm and the photosynthetic photon flux in the red region with a wavelength of 620 nm to 700 nm is 1: 1.3.
- the photosynthetic photon flux is 0.2 ⁇ mol / s in the blue region having a wavelength of 400 nm to 480 nm, and 2.0 ⁇ mol / s in the red region having a wavelength of 620 nm to 700 nm. It has become.
- the ratio of the photosynthetic photon flux in the blue region with a wavelength of 400 nm to 480 nm and the photosynthetic photon flux in the red region with a wavelength of 620 nm to 700 nm is 1:10.
- the ratio of the photosynthetic photon flux in the blue region with a wavelength of 400 nm to 480 nm and the photosynthetic photon flux in the red region with a wavelength of 620 nm to 700 nm is 1: 3.5.
- the ratio of the photosynthetic photon flux in the blue region with a wavelength of 400 nm to 480 nm and the photosynthetic photon flux in the red region with a wavelength of 620 nm to 700 nm is 1: 7.5. Become.
- the ratio of the photosynthetic photon flux in the blue region with a wavelength of 400 nm to 480 nm and the photosynthetic photon flux in the red region with a wavelength of 620 nm to 700 nm is 1: 1.3 to 1:10. .
- an LED light source 1A for plant cultivation suitable for germination / nurturing of plants and cultivation.
- LED packages 10A and 10B having a ratio of 1: 1.3 to 1: 3.5 are preferable. Thereby, it can be set as LED light source 1A for plant cultivation provided with LED package 10A * 10B suitable for germination and seedling of a plant.
- LED packages 10C and 10D having a ratio of 1: 7.5 to 1:10 are preferable. Thereby, LED light source 1A for plant cultivation provided with LED package 10C * 10D suitable for cultivation of a plant can be used.
- FIG. 6 shows the temperature characteristics in relative total luminous flux between the plant cultivation LED light source 1A of the present embodiment and the conventional single LED cultivation red LED chip.
- the horizontal axis indicates the junction temperature of the mounted chip, and the vertical axis indicates the relative total luminous flux value.
- the LED light source for plant cultivation 1A solid line in FIG. 6
- the conventional single red LED chip for plant cultivation broken line in FIG. 6
- the LED light source 1A for plant cultivation of this Embodiment since it comprises with the red fluorescent substance 12a instead of a red LED chip, the temperature characteristic is improving. As a result, the LED light source 1A for plant cultivation can be well matched with the light absorption peak of the light absorption characteristic of chlorophyll.
- the plant-cultivating LED light source 1A of the present embodiment as the red phosphor 12a, CaAlSiN 3: Using Eu.
- the present invention is not necessarily limited to this.
- (Sr, Ca) AlSiN 3 : Eu can also be used.
- the (Sr, Ca) AlSiN 3 may, CaAlSiN 3: In Eu, are those obtained by shifting the emission peak wavelength to shorter wavelengths by replacing part of Ca to Sr, CaAlSiN 3: Eu as well as temperature characteristics stable
- it is a phosphor with high luminous efficiency.
- CaAlSiN 3 : Eu (emission peak 650 to 660 nm) is preferable to use as the red phosphor 12a, particularly for plants containing more chlorophyll a than chlorophyll b.
- (Sr, Ca) AlSiN 3 : Eu having an emission peak (620 to 630 nm) on the shorter wavelength side may be used as the red phosphor 12a. preferable.
- red phosphor 12a 3.5MgO.0.5MgF 2 .GeO 2 : Mn
- LiEuW 2 O 8 (Y, Gd, Eu)
- 2 O 3 , (Y, Gd, Eu) BO 3 and / or YVO 4 Eu
- CaS Eu, Ce, K.
- red phosphors 12a may be used together, such as using CaAlSiN 3 : Eu and (Sr, Ca) AlSiN 3 : Eu. It is effective for cultivation of plants containing half each of chlorophyll a and chlorophyll b.
- the peak wavelength of the blue LED chip 11 may be appropriately selected so as to match the absorption peaks of chlorophyll a and chlorophyll b with respect to the light absorption characteristics of the blue region of chlorophyll.
- a blue LED chip 11 (type I) having a peak at 430 to 440 nm is used in a plant rich in chlorophyll a
- a blue LED chip 11 (type II) having a peak in 450 to 460 nm is used in a plant rich in chlorophyll b. Is preferably used.
- the combination of the blue LED chip 11 and the red fluorescent substance 12a as the LED light source 1A for plant cultivation of the combination matched with each type of chlorophyll a and chlorophyll b.
- a combination of a type I blue LED chip 11 and a red phosphor 12a made of CaAlSiN 3 : Eu, or a type II blue LED chip 11 and a red phosphor 12a made of (Sr, Ca) AlSiN 3 : Eu It is possible to make LED light source 1A for plant cultivation of each combination composition, such as these combinations.
- the blending ratio of the resin 12b and the red phosphor 12a is adjusted as appropriate so that a desired light quantity ratio is obtained.
- the plant cultivation LED light source 1A described above was of a plant cultivation LED light source. However, this LED light source 1A for plant cultivation can be used as the LED package 10E necessary for human work, and can be easily performed.
- LED package 10 for illumination of LED light source 1A for plant cultivation red phosphor mixed resin 12 covering the upper side of blue LED chip 11 is added to resin 12b, red phosphor 12a and green. It is possible to obtain an LED package 10E in which phosphors are additionally mixed and dispersed.
- the compounding ratio of the resin 12b, the red phosphor 12a, and the green phosphor 7c is, for example, 1: 0.01: 0.10. With this blending ratio, the emission spectrum shown in FIG. 7 can be obtained. In the emission spectrum shown in FIG. 7, it can be seen that the amount of light near the wavelength of 550 nm that humans feel most brightly increases. Therefore, it can be seen that the plant cultivation LED light source 1A mounted with the LED package 10E for illumination is effective as an illumination light source for human work.
- the substrate 2A is made of ceramic, and one LED package 10 is mounted on the substrate 2A.
- the LED light source 1B for plant cultivation of the present embodiment is different in that the substrate 2B is made of a film-like base material.
- FIG. 8 is sectional drawing which shows the structure of the LED light source for plant cultivation in this Embodiment
- (b) of FIG. 8 shows the structure of the said LED light source for plant cultivation, red fluorescent substance mixing resin and silicone It is a top view shown except resin.
- FIG. 9A is a side view showing a configuration of the LED light source for plant cultivation in which a plurality of LED packages are mounted and curved on a substrate made of a film-like base material on a mounting substrate made of a film-like base material. It is.
- FIG. 9A is a side view showing a configuration of the LED light source for plant cultivation in which a plurality of LED packages are mounted and curved on a substrate made of a film-like base material on a mounting substrate made of a film-like base material. It is.
- FIG. 9A is a side view showing a configuration of the LED light source for plant cultivation in which a plurality of LED packages are mounted and curved on a substrate made of a film-like base material on a mounting
- FIG. 9B is a side view showing the configuration of the LED light source for plant cultivation in which a plurality of LED packages are mounted and curved on a substrate made of a film-like base material.
- (A) of FIG. 10 is a perspective view showing a configuration of the LED light source for plant cultivation in which a plurality of LED packages are arranged on a belt-like mounting board, and (b) of FIG. 10 shows a plurality of LEDs on a rectangular mounting board. It is a perspective view which shows the structure of the said LED light source for plant cultivation which arrange
- (A) of FIG. 11 is a top view which shows the structure of the said LED light source for plant cultivation which arrange
- FIG. 11B is a plan view showing the configuration of the plant cultivation LED light source in which a plurality of blue LED chips are electrically connected in parallel to the substrate.
- the substrate 2B is made of a film-like base material.
- the film-like substrate it is preferable to use a thin and hard resin film such as polyimide.
- the LED light source 1B for plant cultivation which consists not only of a plane but a curved surface.
- LED light source 1B can be used.
- the substrate 2B is made of a film-like base material, even when the mounting substrate 6 made of a film-like base material is curved, the substrate 2B made of a film-like base material follows the curve. Can also be curved.
- the mounting substrate 6 is not necessarily limited to a film-like base material, and may be a mounting portion made of, for example, metal or resin and having a curved shape.
- FIG. 9 (b) it is possible to provide an LED light source 1B for plant cultivation in which a plurality of LED packages are directly mounted and curved on a substrate 2B made of a film-like base material.
- a film-like resin film made of polyimide is preferable because it is hard and has elasticity and flexibility, so that many LED packages 10 can be mounted on a flat surface and can be used by being curved.
- At least one LED light source 1B for plant cultivation according to the present embodiment is formed on the substrate 2B, similarly to the LED light source 1A for plant cultivation according to the first embodiment.
- the blue LED chip 11 is mounted.
- a red phosphor mixed resin 12 in which a red phosphor 12 a is dispersed or settled is provided so as to cover the blue LED chip 11, and further, the red phosphor mixed resin 12 is covered.
- a transparent silicone resin 13 is provided. Therefore, the LED light source 1B for plant cultivation of the present embodiment is an LED package 10 in which the blue LED chip 11 is doubly sealed with the red phosphor mixed resin 12 and the silicone resin 13 on the substrate 2B. Yes.
- a blue LED chip 11 is mounted on a film-like substrate 2B made of polyimide, for example.
- the blue LED chip 11 is connected to electrode terminals 5 and 5 provided on both sides via wires 4 and 4.
- the hatched portion in FIG. 8B indicates a protective element.
- the protective element is a printing resistor or a Zener diode.
- it is not always necessary to mount a protective element.
- the blue LED chip 11 is used for electrical connection with wires 4 and 4.
- a flip chip type blue LED chip 11 may be used.
- the wire 4 since the wire 4 is not required, non-lighting failure due to disconnection of the wire 4 or the like is reduced.
- the wire 4 made of gold or the like since the wire 4 made of gold or the like is not required, an inexpensive LED light source 1B for plant cultivation is possible.
- tip 11 the red fluorescent substance mixing resin 12, and the silicone resin 13 is the same as LED light source 1A for plant cultivation of the said Embodiment 1, the description is abbreviate
- the LED package 10 on the substrate 2B is not necessarily limited to one, and a plurality of LED packages 10 can be provided.
- a plurality of LED packages 10 are arranged in a row on a belt-like mounting substrate 6, or a rectangular shape as shown in FIG. It is possible to arrange a plurality of LED packages 10 in a matrix on the mounting substrate 6.
- the LED light source 1A for plant cultivation in which one LED package 10 is mounted on the mounting substrate 6 is used, or a plurality of LED light sources 1A for rectangular cultivation are provided on the rectangular mounting substrate 6.
- the plurality of LED packages 10 are not a single type, and various types of LED packages having different light quantity ratios of light emission in the blue region and light emission in the red region can be arranged in combination. Thereby, with the various LED packages 10 mounted on the same board
- the ratio of the amount of light of the blue wavelength light in the short wavelength region and the red wavelength light in the longer wavelength region than the blue wavelength is 1: 1 before germination.
- the degree is sufficient.
- about 1: 1.5 is required as a light amount ratio between light having a blue wavelength in a short wavelength region and light having a red wavelength in a longer wavelength region than the blue wavelength.
- about 1: 3.0 is required as a light quantity ratio between the blue wavelength light in the short wavelength range and the red wavelength light in the longer wavelength range than the blue wavelength.
- the LED light source 1B for plant cultivation depending on the growth process of organisms such as plants and algae, before germination, light having a short wavelength blue wavelength and light having a red wavelength longer than the blue wavelength are emitted. It is preferable that the light quantity ratio can be changed.
- the LED light source 1B for plant cultivation suitable for plant cultivation can be provided reliably.
- connection method of each blue LED chip 11 in this case is to connect the LED packages 10 in parallel according to the type of the LED package 10, as shown in FIG.
- the LED packages 10 of the same type may be connected in series as shown in FIG.
- FIGS. Example of arrangement of multiple types of LED packages
- 12A, 12B, and 12C are configuration examples of LED light sources for plant cultivation in which various LED packages having different light quantity ratios of light emission in the blue region and light emission in the red region are combined and arranged on the substrate.
- FIG. This arrangement example can be applied both in the first embodiment and in the case where a plurality of LED packages 10 are arranged on the mounting substrate 6.
- the ratio of the photosynthetic photon flux in the blue region with a wavelength of 400 nm to 480 nm and the photosynthetic photon flux in the red region with a wavelength of 620 nm to 700 nm is, for example, 1: 1.
- the LED package 10B ′ having a ratio of the photosynthetic photon flux in the blue region to the photosynthetic photon flux in the red region having a wavelength of 620 nm to 700 nm, for example, 1: 3 can be combined and arranged alternately.
- the LED package 10F in which the ratio of each photosynthetic photon flux is, for example, 1: 1 is used before germination.
- an LED package 10A ′ having a ratio of photosynthetic photon flux, for example, 1: 1.5 is used at the time of germination.
- an LED package 10B ′ having a ratio of each photosynthetic photon flux of, for example, 1: 3 is used for raising seedlings.
- the LED package 10A ′ in which the ratio of each photosynthesis photon flux is, for example, 1: 1.5 is the LED package 10F in which the ratio of each photosynthesis photon flux is, for example, 1: 1.
- the LED package 10B ′ having a ratio of each photosynthetic photon flux of 1: 3, for example, are simultaneously turned on. Thereby, the ratio 1: 1.5 of each photosynthetic photon flux that is substantially equivalent to the 1: 1.5 LED package 10A 'can be obtained.
- an LED package 10F in which the ratio of each photosynthesis photon flux is, for example, 1: 1 and an LED package 10B ′ in which the ratio of each photosynthesis photon flux is, for example, 1: 3. Can be arranged alternately in a matrix.
- the LED package 10F having a ratio of each photosynthetic photon flux of 1: 1, for example, is used before germination.
- the LED package 10F having a ratio of each photosynthesis photon flux, for example, 1: 1 and the LED package 10B 'having a ratio of each photosynthesis photon flux, for example, 1: 3 are simultaneously turned on and used.
- an LED package 10B ' having a ratio of each photosynthetic photon flux of, for example, 1: 3 is used.
- the LED light source 1B for plant cultivation suitable for the time before germination of a plant, at the time of germination, at the time of seedling raising, and cultivation can be provided only by 2 types, LED package 10F and LED package 10B '.
- the LED package 10E for illumination described in the first embodiment is used. That is, in the LED package 10E for illumination, as described above, the blending ratio of the resin 12b, the red phosphor 12a, and the green phosphor 7c is, for example, 1: 0.01: 0.10. Then, as shown in FIG. 7, it has an emission spectrum in which the amount of light in the vicinity of a wavelength of 550 nm at which human beings feel the brightest is increasing.
- the ratio of each photosynthesis photon flux is, for example, 1: 1, and each photosynthesis photon
- LED packages 10B ′ having a bundle ratio of 1: 3 and LED packages 10E for illumination are alternately arranged in a matrix.
- the LED package 10F having a ratio of each photosynthetic photon flux of 1: 1, for example, is used. Further, at the time of germination, the LED package 10F having a ratio of each photosynthesis photon flux, for example, 1: 1 and the LED package 10B 'having a ratio of each photosynthesis photon flux, for example, 1: 3 are simultaneously turned on and used. Further, when raising seedlings, an LED package 10B 'having a ratio of each photosynthetic photon flux of, for example, 1: 3 is used. In the case of illumination, the LED package 10E for illumination is turned on.
- the LED light source 1B for plant cultivation suitable for a plant before germination, at the time of germination, and seedling raising and illumination can be provided by three types of LED package 10F, LED package 10B ', and LED package 10E for illumination. .
- Embodiment 3 The following will describe still another embodiment of the present invention.
- the configurations other than those described in the present embodiment are the same as those in the first embodiment and the second embodiment.
- members having the same functions as those shown in the drawings of Embodiment 1 and Embodiment 2 are given the same reference numerals, and explanation thereof is omitted.
- LED light sources for plant cultivation 1A and 1B for plants that require light for growth to perform photosynthesis have been described.
- the LED light source for plant cultivation of the present invention can also target algae that require light for growth in order to carry out photosynthesis. Therefore, in this embodiment, application to algae that perform photosynthesis will be described.
- chlorophyll pigment-based chlorophyll c chlorophyll pigment-based chlorophyll c, bacteriochlorophyll a (835 nm), and carotenoid pigment-based ⁇ -carotene (446 nm), lutein, fucoxanthin (453 nm), and phycopyrine pigment as pigments in addition to chlorophyll a and b for photosynthesis Systemic and phycocyanin (612 nm), phycoerythrin (540 nm).
- the numerical value in parentheses is the wavelength of the absorption peak.
- bacteriochlorophyll has an absorption peak at 700 nm or more.
- the various algae specifically have the following pigments.
- diatoms have chlorophyll a and fucoxanthin (453 nm) as main pigments.
- the chlorophyll a has an absorption peak at 400 to 450 nm in the blue region, and has an absorption peak at 650 to 660 nm in the red region.
- the first peak wavelength of 453 nm of fucoxanthin which is a relatively short wavelength region, among the plurality of peak wavelengths in light absorbed by diatoms that require light for growth in order to carry out photosynthesis corresponds to At least one blue LED chip 11 that emits light in the first short wavelength region, a red phosphor-mixed resin 12 that covers the blue LED chip 11, and a silicone resin 13 that covers the red phosphor mixed resin 12 are provided. Further, the red phosphor 12a as the phosphor contained in the red phosphor-mixed resin 12 absorbs the first short wavelength region light emitted from the blue LED chip 11, and thereby the first of the plurality of peak wavelengths.
- an LED light source for plant cultivation that emits light in a long wavelength region corresponding to a peak wavelength of 650 to 660 nm of chlorophyll a in a longer wavelength region than one peak wavelength of 453 nm. Thereby, the growth of diatom can be promoted.
- the second peak wavelength of 400 to 450 nm of chlorophyll a which is a peak wavelength in a relatively short wavelength region and is different from the first peak wavelength of 453 nm of fucoxanthin among a plurality of peak wavelengths. It may be provided with at least one second LED chip that emits corresponding second short-wavelength light. Thereby, the growth of diatom can be further promoted.
- green algae have chlorophyll a and b and ⁇ -carotene (446 nm) as main pigments.
- chlorophyll a has an absorption peak at 400 to 450 nm in the blue region, and has an absorption peak at 650 to 660 nm in the red region.
- Chlorophyll b has an absorption peak at 400 to 480 nm in the blue region, and an absorption peak at 620 to 630 nm in the red region.
- the first peak wavelength corresponding to the first peak wavelength of 446 nm of ⁇ -carotene which is a relatively short wavelength region, among the plurality of peak wavelengths in light absorbed by the green algae that needs light for growth to perform photosynthesis. It includes at least one blue LED chip 11 that emits light in one short wavelength region, a red phosphor-mixed resin 12 that covers the blue LED chip 11, and a silicone resin 13 that covers the resin.
- the red phosphor contained in the red phosphor-mixed resin 12 absorbs the first short wavelength band light emitted from the blue LED chip 11 and thereby has a longer peak wavelength than the first peak wavelength of 446 nm among a plurality of peak wavelengths.
- an LED light source for plant cultivation that emits light in a long wavelength region corresponding to a peak wavelength of chlorophyll a in the wavelength range of 650 to 660 nm and a peak wavelength of chlorophyll b of 620 to 630 nm. Thereby, the growth of green algae can be promoted.
- cyanobacteria have chlorophyll a and phycocyanin (612 nm) as main pigments. As described above, the chlorophyll a has an absorption peak at 400 to 450 nm in the blue region.
- the first peak wavelength of chlorophyll a which is a relatively short wavelength region, of a plurality of peak wavelengths in light absorbed by cyanobacteria that require light for growth to perform photosynthesis is 400 to 450 nm. It includes at least one blue LED chip 11 that emits corresponding first short wavelength band light, a red phosphor-mixed resin 12 that covers the blue LED chip 11, and a silicone resin 13 that covers it.
- the red phosphor 12a contained in the red phosphor-mixed resin 12 absorbs the first short wavelength band light emitted from the blue LED chip 11 and thereby has a first peak wavelength of 400 to 450 nm among a plurality of peak wavelengths. It is also preferable to use an LED light source for plant cultivation that emits light in the long wavelength region corresponding to the peak wavelength of 612 nm of phycocyanin in the long wavelength region. Thereby, the growth of cyanobacteria can be promoted.
- the first red phosphor contained in the red phosphor-mixed resin 12 absorbs the first short wavelength region light emitted from the first blue LED chip.
- long wavelength band light corresponding to the peak wavelength 650 to 660 nm of chlorophyll a having a wavelength longer than the first peak wavelength 400 to 450 nm is emitted from the plurality of peak wavelengths.
- a second blue LED chip is provided.
- the second red phosphor contained in the red phosphor-containing resin 12 absorbs the first short wavelength band light emitted from the second blue LED chip.
- the plurality of peak wavelengths light having a long wavelength region corresponding to the peak wavelength 612 nm of phycocyanin having a longer wavelength region than the first peak wavelength 400 to 450 nm is emitted.
- the first red phosphor of the first blue LED chip that emits the first short wavelength band light cannot emit the long wavelength band light corresponding to the peak wavelength 612 nm of the relatively long wavelength phycocyanin.
- a second blue LED chip that emits light in the second short wavelength region is used. Thereby, it is possible to emit long wavelength region light corresponding to the peak wavelength of phycocyanin of 612 nm with the second red phosphor.
- such a method can be used not only for cyanobacterium but also for cultivation and culture of other organisms.
- algae such as diatoms, green algae, and cyanobacterium are irradiated with LED light sources for plant cultivation, thereby promoting the growth of algae such as diatoms, green algae, and cyanobacterium. can do.
- an LED light source for plant cultivation that appropriately promotes the growth of organisms such as algae is provided. Can do.
- (Summary) LED light sources 1A and 1B for plant cultivation include a substrate 2A or a substrate 2B, and at least one blue LED chip 11 that is mounted on the substrate 2A or the substrate 2B and emits blue light.
- a red phosphor-mixed resin 12 that covers or disperses the red phosphor 12a that covers the blue LED chip 11 and emits red light by excitation light from the blue LED chip 11, and the red phosphor-mixed resin 12
- a transparent silicone resin 13 for covering is provided.
- the present invention in the growth of organisms such as plants and algae that perform photosynthesis, when relatively blue light is emitted, red light having a longer wavelength than blue light is often required. Therefore, in the present invention, at least one blue LED chip that emits blue light and a red phosphor that covers the blue LED chip and emits red light with excitation light from the blue LED chip are dispersed or settled. And a red phosphor-containing resin.
- the red phosphor is dispersed or settled in the red phosphor-containing resin.
- the red phosphor can be dispersed in the resin at a predetermined blending ratio, and the amount of light in the blue region and the red region can be changed according to the blending ratio.
- the distance between the plant and the silicone resin that is the light emitting surface can be made closer than before. Therefore, there is little light emission loss of the LED light source for plant cultivation.
- the LED light source for plant cultivation can be brought close to a plant.
- An LED light source for plant cultivation can be provided.
- a transparent silicone resin covering the red phosphor-containing resin is provided.
- the silicone resin acts as a lens, the light can be converged in a certain direction by the refractive action of the silicone resin as a lens.
- the light emitted from the blue LED chip and the resin mixed with the red phosphor can reach farther, so that the amount of light irradiated to a distant plant can be increased, and the light extraction efficiency is consequently increased.
- the number of LED packages mounted to obtain the required illuminance can be reduced as compared with a conventional light emitting device using a blue LED chip and a red LED chip, thereby reducing power consumption. it can.
- an LED light source for plant cultivation that can increase the light extraction efficiency can be provided.
- the LED light sources 1A and 1B for plant cultivation according to aspect 2 of the present invention are the LED light sources for plant cultivation according to aspect 1, wherein the substrate 2A or the substrate 2B is made of a ceramic or film-like base material. .
- the LED light source for plant cultivation 1A and 1B according to aspect 3 of the present invention is the LED light source for plant cultivation according to aspect 1 or 2, and the red phosphor-mixed resin 12 and the silicone resin 13 are both dome-shaped. It is characterized by that.
- the emitted light can be emitted radially uniformly in a high range.
- the LED light source for plant cultivation 1A and 1B according to aspect 4 of the present invention is the LED light source for plant cultivation according to aspect 1, 2 or 3, wherein the blue LED chip 11 emits light having a light emission peak wavelength in the range of 400 to 480 nm. Emits light.
- the red phosphor 12a emits light having an emission peak wavelength in the range of 620 to 700 nm.
- the LED light source for plant cultivation includes a substrate, at least one blue LED chip, a red phosphor mixed resin in which a red phosphor covering the blue LED chip is dispersed, and the red phosphor mixed resin. It consists of a covering silicone resin.
- the blue LED chip can output light in the wavelength range of 400 to 480 nm so as to correspond to the blue region absorption peak of chlorophyll.
- the red phosphor emits light having an emission peak wavelength of 620 to 700 nm so as to correspond to the red region absorption peak of chlorophyll by excitation light from the blue LED chip.
- An LED light source for plant cultivation can be provided.
- the LED light source for plant cultivation 1A and 1B according to aspect 5 of the present invention is the LED light source for plant cultivation according to any one of aspects 1 to 4, wherein the blue LED chip 11 is placed on the substrate 2A or substrate 2B with the red fluorescent light.
- a plurality of LED packages 10 covered with body-mixing resin 12 and silicone resin 13 are mounted, and the plurality of LED packages 10 is a combination of various types having different light quantity ratios of light emission in the blue region and light emission in the red region. It is characterized by being arranged.
- the ratio of the amount of light of the blue wavelength light in the short wavelength region and the red wavelength light in the longer wavelength region than the blue wavelength is 1: 1 before germination.
- the degree is sufficient.
- about 1: 1.5 is required as a light amount ratio between light having a blue wavelength in a short wavelength region and light having a red wavelength in a longer wavelength region than the blue wavelength.
- about 1: 3.0 is required as a light quantity ratio between light having a blue wavelength in a short wavelength region and light having a red wavelength in a longer wavelength region than the blue wavelength.
- the LED light source for plant cultivation according to the growth process of organisms such as plants and algae, before germination, light having a short wavelength blue wavelength and light having a longer wavelength than the blue wavelength It is preferable that the light quantity ratio can be changed.
- a plurality of LED packages in which the blue LED chip is covered with the red phosphor mixed resin and the silicone resin are mounted on the substrate.
- the plurality of LED packages are arranged in a combination of various types having different light quantity ratios for light emission in the blue region and light emission in the red region.
- the blue wavelength of the light intensity ratio corresponding to the growth process of the organism is prepared. And light having a red wavelength longer than the blue wavelength can be emitted.
- the blue LED chip 11 should correspond to the blue region absorption peak of chlorophyll a.
- At least one blue LED chip for chlorophyll a having an emission peak in the wavelength range of 400 to 450 nm and at least one having an emission peak in the wavelength range of 400 to 480 nm to correspond to the blue region absorption peak of chlorophyll b
- a blue LED chip for chlorophyll b is
- chlorophyll a and chlorophyll b have different light absorption characteristics in the blue region. Specifically, chlorophyll a has an absorption peak at 400 to 450 nm in the blue region, and chlorophyll b has an absorption peak at 400 to 480 nm in the blue region.
- light is emitted in the wavelength range of 400 to 450 nm so as to correspond to the blue region absorption peak of chlorophyll a so as to correspond to the two types of light absorption characteristics in the blue region of chlorophyll a and chlorophyll b, respectively.
- an LED light source for plant cultivation more suitable for a plant having chlorophyll a and chlorophyll b can be provided.
- the present invention can be applied to an LED light source for plant cultivation that emits light absorbed by a plant that needs light for growth in order to perform photosynthesis.
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Abstract
Description
(A)赤色LEDチップを高輝度発光させる(駆動電流を増加する)。
(B)搭載するLEDチップ数を増やす。
(C)赤色LEDチップの個数を増やす。
本発明の一実施形態について図1~図7に基づいて説明すれば、以下のとおりである。
本実施の形態の植物栽培用LED光源の構成について、図1に基づいて説明する。図1は本実施の形態の植物栽培用LED光源の構成を示す断面図である。
本実施の形態の植物栽培用LED光源1AにおけるLEDパッケージ10の青色域と赤色域との光量割合の調整方法について、図3の(a)(b)及び図4の(a)(b)に基づいて説明する。図3の(a)は植物栽培用LED光源において赤色蛍光体混入樹脂の配合比を樹脂:赤色蛍光体=1:0.05としたときの発光スペクトルを示すグラフである。図3の(b)は植物栽培用LED光源において赤色蛍光体混入樹脂の配合比を樹脂:赤色蛍光体=1:0.10としたときの発光スペクトルを示すグラフである。また、図4の(a)は植物栽培用LED光源において赤色蛍光体混入樹脂の配合比を樹脂:赤色蛍光体=1:0.15としたときの発光スペクトルを示すグラフである。図4の(b)は上記植物栽培用LED光源において赤色蛍光体混入樹脂の配合比を樹脂:赤色蛍光体=1:0.20としたときの発光スペクトルを示すグラフである。
次に、植物の成長においてどのような波長の光を照射すればよいのかについて、図5に基づいて説明する。図5は、クロロフィルの吸収スペクトルと、本実施の形態の植物栽培用LED光源における各LEDパッケージの適用例を示す図である。
ここで、上記の説明において、本実施の形態の植物栽培用LED光源1Aでは、赤色蛍光体12aとして、CaAlSiN3 :Euを使用した。しかし、必ずしもこれに限らず、例えば、(Sr,Ca)AlSiN3 :Euを使用することも可能である。この(Sr,Ca)AlSiN3は、CaAlSiN3 :Euにおいて、Caの一部をSrに置換えて発光ピーク波長を短波長にシフトさせたものであり、CaAlSiN3 :Euと同様に温度特性が安定かつ高発光効率の蛍光体である。
上述した植物栽培用LED光源1Aは、植物栽培用LED光源のものであった。しかし、この植物栽培用LED光源1Aを利用して人間が作業するために必要なLEDパッケージ10Eとすることが可能であり、容易に行うことができる。
本発明の他の実施の形態について図8~図12に基づいて説明すれば、以下のとおりである。尚、本実施の形態において説明すること以外の構成は、前記実施の形態1と同じである。また、説明の便宜上、前記の実施の形態1の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。
本実施の形態の植物栽培用LED光源1Bに構成について、図8の(a)(b)~図11の(a)(b)に基づいて説明する。図8の(a)は本実施の形態における植物栽培用LED光源の構成を示す断面図であり、図8の(b)は上記植物栽培用LED光源の構成を、赤色蛍光体混入樹脂及びシリコーン樹脂を除いて示す平面図である。図9の(a)はフィルム状の基材からなる搭載基板にフィルム状の基材からなる基板上に複数のLEDパッケージを搭載して湾曲させた上記植物栽培用LED光源の構成を示す側面図である。図9の(b)はフィルム状の基材からなる基板上に複数のLEDパッケージを搭載して湾曲させた上記植物栽培用LED光源の構成を示す側面図である。図10の(a)は帯状の搭載基板に複数のLEDパッケージを配設した上記植物栽培用LED光源の構成を示す斜視図であり、図10の(b)は長方形の搭載基板に複数のLEDパッケージを配設した上記植物栽培用LED光源の構成を示す斜視図である。図11の(a)は基板に複数の青色LEDチップを電気的に並列接続して配設した上記植物栽培用LED光源の構成を示す平面図である。図11の(b)は基板に複数の青色LEDチップを電気的に並列接続して配設した上記植物栽培用LED光源の構成を示す平面図である。
ここで、複数のLEDパッケージ10におけるフィルム状の基板2B上での青色領域の発光と赤色領域の発光との光量割合が異なる各種のLEDパッケージ10の組み合わせ例について、図12の(a)(b)(c)に基づいて説明する。図12の(a)(b)(c)は、青色領域の発光と赤色領域の発光との光量割合が異なる各種のLEDパッケージを組み合わせて基板に配設した植物栽培用LED光源の構成例を示す平面図である。尚、この配設例は、前述の実施の形態1における場合も、搭載基板6に複数のLEDパッケージ10を配設する場合においても適用できるものである。
本発明のさらに他の実施の形態について説明すれば、以下のとおりである。尚、本実施の形態において説明すること以外の構成は、前記実施の形態1及び実施の形態2と同じである。また、説明の便宜上、前記の実施の形態1及び実施の形態2の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。
本発明の一態様の植物栽培用LED光源1A・1Bは、基板2A又は基板2Bと、上記基板2A又は基板2Bの上に搭載されて青色光を発光する少なくとも1個の青色LEDチップ11と、上記青色LEDチップ11を覆いかつ該青色LEDチップ11からの励起光にて赤色光を発光する赤色蛍光体12aを分散又は沈降させた赤色蛍光体混入樹脂12と、上記赤色蛍光体混入樹脂12を覆う透明のシリコーン樹脂13とが設けられていることを特徴としている。
1B 植物栽培用LED光源
2A 基板
2B 基板
3 電極
4 ワイヤ
5 電極端子
6 搭載基板
10 LEDパッケージ
10A LEDパッケージ
10A’ LEDパッケージ
10B LEDパッケージ
10B’ LEDパッケージ
10C LEDパッケージ
10D LEDパッケージ
10E LEDパッケージ
10F LEDパッケージ
11 青色LEDチップ
12 赤色蛍光体混入樹脂
12a 赤色蛍光体
12b 樹脂
13 シリコーン樹脂
Claims (5)
- 基板と、
上記基板の上に搭載されて青色光を発光する少なくとも1個の青色LEDチップと、
上記青色LEDチップを覆いかつ該青色LEDチップからの励起光にて赤色光を発光する赤色蛍光体を分散又は沈降させた赤色蛍光体混入樹脂と、
上記赤色蛍光体混入樹脂を覆う透明のシリコーン樹脂とが設けられていることを特徴とする植物栽培用LED光源。 - 前記基板は、セラミック又はフィルム状の基材からなっていることを特徴とする請求項1記載の植物栽培用LED光源。
- 前記赤色蛍光体混入樹脂及びシリコーン樹脂は、いずれもドーム状にてなっていることを特徴とする請求項1又は2記載の植物栽培用LED光源。
- 前記青色LEDチップは、400~480nmの範囲に発光ピーク波長を有する光を発光すると共に、
前記赤色蛍光体は、620~700nmの範囲に発光ピーク波長を有する光を発光することを特徴とする請求項1,2又は3記載の植物栽培用LED光源。 - 前記基板には、前記青色LEDチップを前記赤色蛍光体混入樹脂とシリコーン樹脂とで覆ったLEDパッケージが複数搭載されており、
上記複数のLEDパッケージは、青色領域の発光と赤色領域の発光との光量割合が異なる各種のものが組み合わされて配置されていることを特徴とする請求項1~4のいずれか1項に記載の植物栽培用LED光源。
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CN104853587A (zh) | 2015-08-19 |
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EP2957166A4 (en) | 2016-03-02 |
US20150327446A1 (en) | 2015-11-19 |
JP2016187054A (ja) | 2016-10-27 |
JP6017665B2 (ja) | 2016-11-02 |
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