JP2010129389A - Led light source for plant growth, and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and compact LED (Light Emitting Diode) light source for plant growth, which has sufficient durability even under a high-humidity condition where a liquid fertilizer necessary for plant growth is used by entirely sealing a light source substrate with a transparent moisture-proof film in a deaerated state. <P>SOLUTION: The light source includes an electric wire distribution including an insulating layer having a plurality of openings and a conductor pattern, which is formed on a first surface of a first substrate; a plurality of bear chips of light emitting diodes fixed to the plurality of openings by a heat conductive die-bond resin; a control wire for supplying current and control signal from an external circuit; and a moisture-resistant and translucent composite film formed into a bag shape. The first substrate is housed in the composite film bag, the side not connected to a terminal part of the control wire is extended out of the composite film bag, and the composite film bag is internally deaerated and circumferentially sealed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an LED light source device for plant growth and an illumination device.

  Traditionally, in house cultivation of plants such as vegetables, for the purpose of controlling the sunshine time to adjust the cultivation time so that it can be shipped at the desired time, or to grow all plants uniformly The plant is irradiated with light from the lighting device. In recent years, LEDs (Light Emitting Diodes) have been used as light sources for such plant-growing lighting devices because of their long lifetime and low power consumption. And the lighting apparatus for plant cultivation which protected the LED by taking a moisture-proof measure is proposed so that it can be made to operate | move continuously also in the high-humidity conditions required for the growth of a plant (for example, refer patent document 1). .)

  Such a plant-growing lighting device has a translucent structure in which a plurality of individually molded LEDs are arranged at an appropriate distance and a space is formed between the base and the base. A panel-like structure in which a gas such as dry air or an inert gas is sealed, and the base and the cover are sealed with a sealing material.

In addition, a plurality of LEDs are arranged on the printed circuit board at an appropriate distance and fixed by die bonding, and the LEDs are connected to the power supply wiring on the printed circuit board by wire bonding, so that the LED and the wire are translucent. An illuminating device for plant cultivation having a structure hermetically sealed with a moisture-proof material is also proposed.
JP 2000-207933 A

  However, in the conventional plant-growing lighting device, it is necessary to take separate moisture-proof measures on the base on which individually molded LEDs are arranged and the exposed portion of the translucent cover. Furthermore, since a space is formed between the base and the cover, the entire thickness is increased.

  Moreover, the plant growth lighting device having a structure in which the LED and the wire are hermetically sealed with a light-transmitting moisture-proof material has insufficient durability under high-humidity conditions using liquid manure necessary for plant growth.

  The present invention solves the problems of the conventional plant-growing lighting device, mounts a bare chip of a light-emitting diode on a light source substrate having a metal base having high electrical conductivity and thermal conductivity, and transparently mounts the mounting surface. Covered with resin and degassed and sealed the entire light source substrate with a transparent moisture-proof film, so that it is sufficiently durable even under high-humidity conditions that use liquid fertilizer necessary for plant growth, and is inexpensive and compact. It aims at providing the LED light source device for plant cultivation, and an illuminating device.

  Therefore, in the LED light source device for plant growth of the present invention, a first substrate having thermal conductivity, an insulating layer having a plurality of openings formed on the first surface of the first substrate, and An electrical wiring composed of a conductor pattern; a plurality of light emitting diode bare chips fixed by a die bond resin having thermal conductivity in the plurality of openings; an anode electrode formed on each of the light emitting diode bare chips; Wire connection for wire-bonding the cathode electrode and the electrical wiring, transparent resin covering the bare chip of all the light emitting diodes and the wire wiring, and electrically connected to the terminal portion of the electrical wiring, A control wiring for supplying a current and a control signal from an external circuit; and a composite film having moisture resistance and translucency and processed into a bag shape. The substrate is housed in the composite film bag, the side of the control wiring not connected to the terminal portion extends out of the composite film bag, and the composite film bag is deaerated inside. The surroundings are sealed.

  According to the present invention, in an LED light source device for plant growth, a bare chip of a light emitting diode is mounted on a light source substrate having an electrically conductive and thermally conductive metal base, and the mounting surface is covered with a transparent resin. The whole part is deaerated and sealed with a transparent moisture-proof film. Thereby, it is possible to obtain an LED light source device for plant cultivation that is sufficiently durable and low in price and compact even under high-humidity conditions that use liquid fertilizer necessary for plant growth.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a plant-growing lighting device according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a light source unit according to the first embodiment of the present invention.

  In the figure, 100 is a light source unit as a plant growing LED light source device of the plant growing lighting device in the present embodiment, and a light source substrate 10 as a first substrate having a light emitting area 20, and the light source substrate 10. A moisture-proof film 25 as a composite film that accommodates the light source, and an FPC (Flexible Printed Circuit) 40 as a flexible wiring board that is a control wiring connected to the light source board 10.

  Reference numeral 200 denotes a control unit of the plant growth lighting device according to the present embodiment, and includes a power supply 60 that supplies current to the light source unit 100 and a control circuit as an external circuit that controls the operation of the light source unit 100. The light source unit 100 is driven at a constant current by having a control board 50 and a power supply wiring 61 for connecting the control board 50 and the power supply 60.

  The plant-growing lighting device in the present embodiment is preferably used for irradiating a plant with light in a closed space such as a greenhouse or a house that grows plants such as vegetables, fruits, and trees. However, it may be used as a lighting device for other purposes.

  The light source unit 100 includes LED elements 21 as bare chips of a plurality of light emitting diodes mounted on a portion corresponding to the light emitting area 20 on the light source substrate 10, and the LED elements 21 emit light to emit light. To do. As shown in FIG. 2, the plurality of LED elements 21 are arranged in an array on the upper surface as the first surface of the light source substrate 10. In the example shown in the figure, for convenience of explanation, the LED elements 21 are arranged so that columns of three LED elements 21 electrically connected in series are arranged in a line, that is, in three rows and three columns. Although arranged, the LED elements 21 can be arranged in any number and form according to the luminance and area of the light emitting area 20 required for the light source unit 100.

  The moisture-proof film 25 is processed into a bag shape with moisture resistance and translucency. In the figure, reference numeral 26 denotes a heat bonding portion, which is formed by bonding two moisture-proof films 25 by heat bonding, and forms a peripheral edge of a bag for housing the light source substrate 10. Reference numeral 27 denotes an FPC coating adhesive portion, which is a portion that seals the FPC 40 and the moisture-proof film 25 extending outward from the inside of the moisture-proof film 25. Although not shown in FIG. 2, the FPC 40 extends in the direction indicated by the arrow and is connected to the control board 50.

  Next, a process for assembling the light source unit 100 will be described.

  FIG. 3 is a perspective view of the light source board in the first embodiment of the present invention, FIG. 4 is a perspective view of the light source board on which the LED element in the first embodiment of the present invention is mounted, and FIG. FIG. 6 is a perspective view of a light source substrate in which LED elements in the first embodiment are wire bonded, FIG. 6 is a perspective view of a light source substrate in which the LED elements and wires in the first embodiment of the present invention are covered with a transparent resin, and FIG. It is a perspective view of the light source board | substrate which connected FPC in the 1st Embodiment of this invention.

  As shown in FIG. 3, the light source substrate 10 includes a plate-like metal base 11 as a first substrate formed of a metal material having high electrical and thermal conductivity such as copper and aluminum, an epoxy resin, An insulating layer 12 made of a resist material having insulating properties such as glass epoxy resin and low melting point glass and formed on the upper surface as the first surface of the metal base 11 is provided. A plurality of openings 13 are formed in the insulating layer 12 in the vertical direction or the horizontal direction, respectively.

  On the insulating layer 12, electrodes 14, wirings 15 and lead terminals 16 as electrical wirings are formed by copper or by laminating a metal material such as copper or nickel and gold. The Then, one wiring 15 is provided for each of the columns formed by a plurality (three in the example shown in the figure) of openings 13 arranged in the vertical direction.

  On the other hand, the electrode 14 is disposed between two adjacent openings 13 in each row of the openings 13 arranged in the vertical direction. The electrode 14 is formed in a floating island shape, and the electrode 14 disposed close to the takeout terminal 16 that is a terminal portion of the electrical wiring is formed in electrical connection with the takeout terminal 16, and is formed from the takeout terminal 16. The farthest electrode 14 is formed in electrical connection with the wiring 15.

  The surface of the metal base 11 is exposed at the opening 13, and the LED element 21 is attached to the opening 13 via a die bond resin 22 as shown in FIG. 4. Preferably, as the die bond resin 22, a material in which high heat conductive particles such as alumina and silver are mixed in the main agent such as an epoxy resin and a silicone resin in an amount that does not cause an adhesion failure is used. .

  The LED element 21 is made of aluminum gallium arsenide, indium aluminum gallium arsenide, aluminum gallium indium oxide on a base material made of a material such as gallium arsenide (arsenic), gallium nitride, sapphire, etc. by vapor phase growth method such as MOCVD method. This chip is a heterostructure or double heterostructure formed by epitaxially growing and laminating inorganic materials such as mulin, gallium phosphide, gallium nitride, indium gallium nitride, aluminum gallium nitride, and aluminum nitride.

  In addition, even if the said LED element 21 is light-emitting in the infrared which has a light emission range in wavelength 710-800 nanometer, or it is light-emitting in red which has a light emission range in wavelength 620-710 nanometer. Even if it emits green light having an emission region at a wavelength of 500 to 580 nanometers, or emits blue light having an emission region at a wavelength of 450 to 500 nanometers, It may emit light in the ultraviolet having an emission region. Further, the LED element 21 is made of aluminum gallium arsenide, indium aluminum gallium arsenide, aluminum gallium indium phosphide on a base material made of a material such as gallium arsenide, gallium nitride, sapphire, etc. by vapor deposition such as MOCVD. An inorganic material such as gallium phosphide, gallium nitride, indium gallium nitride, aluminum gallium nitride, and aluminum nitride is epitaxially grown and laminated to form a heterostructure or a double heterostructure. The material is not limited to the above.

  Further, as shown in FIG. 5, the LED element 21 is formed by laminating a metal electrode made of gold or aluminum, or a metal material such as gold or aluminum and nickel, titanium or the like, as shown in FIG. An anode electrode 21a and a cathode electrode 21c, which are metal electrodes, are formed.

  The adjacent electrode 14, the anode electrode 21a, and the cathode electrode 21c are connected to each other so that the LED elements 21 arranged in each row of the openings 13 arranged in the vertical direction are electrically connected in series. Wire bonds are connected by gold wires 23 as wiring.

  Subsequently, as shown in FIG. 6, all the LED elements 21 and the gold wires 23 are transparent formed of a material such as a transparent silicone resin or a transparent epoxy resin that transmits light having a wavelength emitted by the LED elements 21. It is protected by being coated with the resin 24.

  And the extraction terminal 16 of the light source board | substrate 10 is an electrical wiring formed by thin-film laminating | stacking copper or nickel, and metal materials, such as gold | metal | money, on base materials, such as a liquid crystal polymer sheet and a polyimide sheet. The electrical wiring of the FPC 40 provided is connected via an ACF (Anisotropic Conductive Film) 41 as an anisotropic conductive film.

  Subsequently, the light source substrate 10 to which the FPC 40 is connected is accommodated in a moisture-proof transparent moisture-proof film 25 that is processed into a bag shape to fit the light source substrate 10. In addition, the FPC coating | bonding adhesive part 27 is arrange | positioned in the part which this moisture proof film 25 and FPC40 contact. And the opening part of the moisture-proof film 25 is heat-sealed, dehumidifying or deaerating the inside of the moisture-proof film 25. FIG.

  Here, the moisture-proof film 25 is a transparent laminated sheet that can be sealed by heating at about 150 [° C.]. For example, a polyester film is coated with polyvinylidene chloride or the like to improve moisture resistance, such as silica. It is a composite film which has an antistatic effect by vapor deposition and is heat-sealed by laminating nylon, polyethylene or the like.

  Moreover, the FPC coating | bonding adhesion part 27 consists of a resin material which can seal FPC40 and the moisture-proof film 25 by heating about 150 [degreeC], for example, consists of an epoxy-type adhesive agent or an epoxy-type adhesive sheet.

  In the present embodiment, for convenience of explanation, only the example in which the ACF 41 is used as means for connecting the electrical wiring of the FPC 40 to the extraction terminal 16 of the light source substrate 10 has been described. However, the electrical wiring of the FPC 40 and the extraction terminal 16 are described. Any connecting means such as an electrically conductive adhesive, an alloy joint using a solder material, or the like may be used as long as the means can be electrically connected to each other.

  Further, the base material of the FPC 40 need not be limited to those made of the above-mentioned materials, and any material can be used as long as it is a plastic sheet that has excellent flexibility, heat resistance and moisture resistance and is capable of electrode wiring. It may be a thing. Similarly, the moisture-proof film 25 need not be limited to those made of the above materials, and any material can be used as long as it has light-transmitting properties and moisture-proof properties and can be sealed in an environment where static electricity is taken. It may consist of: Further, the FPC covering adhesive portion 27 is not necessarily limited to the one made of the above material, and may be made of any material as long as the FPC 40 and the moisture-proof film 25 can be sealed.

  Next, the circuit configuration of the plant-growing lighting device in the present embodiment will be described.

  FIG. 8 is a diagram showing a circuit configuration of the plant-growing lighting device according to the first embodiment of the present invention.

  Here, for convenience of explanation, a circuit configuration in the case where the light emitting area 20 of the light source unit 100 has nine LED elements 21 arranged in 3 rows and 3 columns will be described.

  The power source 60 of the control unit 200 includes a transformer 63, a rectifying element 64, and a capacitor 65. The primary coil side of the transformer 63 is electrically connected to an AC power source (not shown) of AC 100 [V], for example, which is used for a general commercial power source via a power terminal 62. The secondary coil side of the transformer 63 is electrically connected to an AC voltage input portion of a rectifying element 64 composed of a bridge element including four diodes. Further, a capacitor 65 is electrically connected to the DC voltage output portion of the rectifying element 64.

  Accordingly, when the power source 60 is connected to an AC power source and an AC voltage is input, the DC voltage of a desired voltage can be output and supplied to the control board 50.

  The control board 50 includes a transistor 52, a constant current diode 53, a current adjusting fixed resistor 54, a current adjusting variable resistor 55, a first protection resistor 56, a second protection resistor 57, and a fuse 58. As described above, since the control board 50 and the power supply 60 are connected by the power supply wiring 61, the DC voltage output from the power supply 60 is supplied to the control board 50 through the power supply wiring 61. A part of the positive voltage of the DC voltage is directly supplied to the light source unit 100 through the FPC 40 as a current supply source of the LED element 21. Specifically, as shown in the drawing, one line branched from the plus-side line on the input side of the control board 50 bypasses the other circuits of the control board 50, passes through the FPC 40, and passes through the light source unit. One end of each row of 100 LED elements 21, that is, each take-out terminal 16 of each of the three rows of wirings 15 is connected.

  The other part of the positive voltage of the DC voltage is supplied to the constant current diode 53 via the second protection resistor 57 as a power supply for the drive circuit. On the other hand, the negative voltage of the DC voltage is supplied to the current adjusting variable resistor 55 and the emitter terminals of the three systems of transistors 52 via the circuit protection fuse 58.

  The transistor 52 is a driving element for sucking a constant current having a set value, and one transistor 52 is provided for each column of the LED elements 21 of the light source unit 100. The other ends of the current adjusting fixed resistors 54 whose one ends are connected to the base terminals of the respective transistors 52 are connected to each other and connected to the constant current diode 53 and the current adjusting variable resistor 55. .

  As a result, a current whose voltage is adjusted by each of the current adjusting fixed resistor 54 and the current adjusting variable resistor 55 is supplied to each base terminal of each transistor 52.

  In addition, each of the three lines connected to the collector terminal of the transistor 52 is connected to each column of the LED elements 21 of the light source unit 100 via the corresponding first protective resistors 56 and further via the FPC 40. The other end, that is, each extraction terminal 16 directly connected to the electrode 14 is connected.

  Next, the operation of the plant growth lighting device having the above-described configuration will be described.

  For example, when an AC voltage of 100 [V] is supplied to the power supply terminal 62 of the power supply 60, the AC voltage is converted to a predetermined level by the transformer 63, and then the entire voltage is converted by the rectifying element 64 and the capacitor 65. It is converted to a constant rectified DC voltage.

  Here, the converted DC voltage passes through each transistor 52 of the control board 50, and the LED elements 21 in three rows and three columns of the light source unit 100, that is, three LED elements 21 connected in series in each column. Can be operated, and a desired current can be supplied. Therefore, if the current value and the voltage value that can cause the LED element 21 to emit light with a predetermined luminance are lp and Vp, and the voltage generated between the collector and the emitter of the transistor 52 is Vce, the voltage value of the DC voltage is , Vp × 3 + Vce.

  The DC voltage converted by the power supply 60 is supplied to the control board 50 via the power supply wiring 61. A constant current circuit of the control board 50, that is, a constant current circuit including a transistor 52, a constant current diode 53, a current adjusting variable resistor 55, and a current adjusting fixed resistor 54, generates a current having a constant current value. Three lines of suction are formed.

  One line connected to the positive side of the DC voltage and three lines for sucking current are connected to each column of the LED elements 21 of the light source unit 100 via the FPC 40.

  Specifically, one line connected to the positive side of the DC voltage is connected to one end of each column of the LED elements 21 of the light source unit 100 and supplies a positive DC voltage. Thereby, a positive DC voltage is supplied to the anode electrode 21a of the LED element 21 located at the uppermost stream of each column. In this case, since the LED elements 21 are connected in series in each row, the anode electrode 21a of the LED element 21 located on the downstream side supplies a voltage from the cathode electrode 21c of the LED element 21 located on the upstream side. Then, the current generated in the LED element 21 is sucked.

  On the other hand, each of the three lines that absorb current is connected to the other end of each column of the LED elements 21 of the light source unit 100 and absorbs current. Thereby, the current from the cathode electrode 21c of the LED element 21 located on the most downstream side of each column is sucked from the collector terminal by the corresponding transistor 52. Note that the current sucked by the transistor 52 is discharged from its emitter terminal. Further, the magnitude of the current sucked by the transistor 52, that is, the current value of the sucked current can be adjusted by changing the voltage value supplied to the base terminal of each transistor 52.

  Here, for convenience of explanation, the LED elements 21 are arranged so that columns of three LED elements 21 electrically connected in series are arranged in a line, that is, in three rows and three columns. Although only the case where the light source unit 100 is operated has been described, the case where the number of LED elements 21 and the form of the array 21 are changed according to the luminance and area of the light emitting area 20 required for the light source unit 100 corresponds to that. The configuration of the control unit 200 can be changed to a configuration that exhibits the current value of the sink current.

  As described above, in the present embodiment, the LED element 21 is mounted on the light source substrate 10 including the metal base 11 having high electrical conductivity and thermal conductivity, and the mounting surface is covered with the transparent resin 24. The whole 10 is deaerated and sealed with a transparent moisture-proof film 25. Thereby, it is possible to provide a light source unit 100 and a plant-growing lighting device that are sufficiently durable and low-priced even under high-humidity conditions using liquid fertilizer necessary for plant growth.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  FIG. 9 is a diagram showing a configuration of a plant-growing lighting device according to the second embodiment of the present invention.

  In the present embodiment, the FPC 40 has one end connected to the light source substrate 10 and the other end connected to the relay substrate 43. One end of the control wiring cable 44 is connected to the end of the relay board 43 opposite to the FPC 40, and the other end of the control wiring cable 44 is connected to the control board 50. That is, the light source board 10 of the light source unit 100 in the present embodiment is connected to the control board 50 of the control unit 200 via the FPC 40, the relay board 43, and the control wiring cable 44.

  Therefore, for example, in the case where a plurality of light source units 100 are disposed in a vinyl house for plant growth and all the light source units 100 are centrally managed, each light source unit 100 and the control unit 200 The FPC 40 formed of a high cost and low environmental resistance material can be shortened, and most of the wiring between the light source unit 100 and the control unit 200 can be provided at a low price. In addition, it is possible to use the control wiring cable 44 having high environmental resistance and coated with vinyl chloride, polyurethane or the like so that it can be used outdoors.

  Here, the electrical connection means between the FPC 40 and the relay board 43 and the electrical connection means between the control wiring cable 44 and the relay board 43 can electrically connect the electrical wirings. Any type of connection means such as an ACF, a conductive adhesive, an alloy joint using a solder material, or the like may be used.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted.

  Next, operation | movement of the illuminating device for plant cultivation in this Embodiment is demonstrated.

  The DC voltage converted by the power supply 60 is supplied to the control board 50 via the power supply wiring 61. Then, by a constant current circuit including the transistor 52, the constant current diode 53, the current adjusting variable resistor 55, and the current adjusting fixed resistor 54 of the control board 50, three lines for sucking a current of a constant current value are obtained. It is formed.

  One line connected to the positive side of the DC voltage and three lines for sucking current are connected to each row of the LED elements 21 of the light source unit 100 via the FPC 40, the relay board 43, and the control wiring cable 44. Is done.

  Specifically, one line connected to the positive side of the DC voltage is connected to one end of each column of the LED elements 21 of the light source unit 100 and supplies a positive DC voltage. Thereby, a positive DC voltage is supplied to the anode electrode 21a of the LED element 21 located at the uppermost stream of each column. In this case, since the LED elements 21 are connected in series in each row, the anode electrode 21a of the LED element 21 located on the downstream side supplies a voltage from the cathode electrode 21c of the LED element 21 located on the upstream side. Then, the current generated in the LED element 21 is sucked.

  On the other hand, each of the three lines that absorb current is connected to the other end of each column of the LED elements 21 of the light source unit 100 and absorbs current. Thereby, the current from the cathode electrode 21c of the LED element 21 located on the most downstream side of each column is sucked from the collector terminal by the corresponding transistor 52. Note that the current sucked by the transistor 52 is discharged from its emitter terminal. Further, the current value of the sink current can be adjusted by changing the voltage value supplied to the base terminal of each transistor 52.

  Thus, in the present embodiment, the light source board 10 of the light source unit 100 is connected to the control board 50 of the control unit 200 via the FPC 40, the relay board 43, and the control wiring cable 44. As a result, when the light source unit 100 and the control unit 200 are arranged apart from each other, the FPC 40 formed of a material that is expensive and has low environmental resistance can be shortened, and the light source unit 100 and the control unit 200 The control wiring cable 44 with low cost and high environmental resistance can be used for most of the wiring between the cables. Therefore, it is possible to provide a plant-growing lighting device that is lower in price and more excellent in environmental resistance.

  Next, a third embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st and 2nd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Also, the description of the same operations and effects as those of the first and second embodiments is omitted.

  FIG. 10 is a diagram showing a configuration of a plant-growing lighting device according to the third embodiment of the present invention, and FIG. 11 is a perspective view of a light source unit according to the third embodiment of the present invention.

  In the present embodiment, the light source board 10 of the light source unit 100 is connected to the control board 50 of the control unit 200 via the control wiring cable 44. That is, the FPC 40 and the relay board 43 are omitted, and one end of the control wiring cable 44 is connected to the light source board 10.

  And each electric wiring 45 extended from the front-end | tip of the coating coat of the control wiring cable 44 is electrically connected to the taking-out terminal 16 by the electrical connection part 46 which consists of alloy joining by a solder material etc. or a conductive adhesive agent. . Further, a deformed heat bonding portion 28 is disposed at a portion where the moisture-proof film 25 and the control wiring cable 44 are in contact with each other, and the opening is heat-sealed while dehumidifying or degassing the inside of the moisture-proof film 25.

  Here, the odd-shaped heat bonding portion 28 includes an escape portion formed in the same shape and size as the cross-sectional shape of the control wiring cable 44, and the relief wiring portion 44 is heated to 150 ° C. at the escape portion. A resin material capable of sealing the moisture-proof film 25, such as an epoxy adhesive, is applied.

  Since the configuration of other points is the same as that of the first and second embodiments, the description thereof is omitted.

  Next, operation | movement of the illuminating device for plant cultivation in this Embodiment is demonstrated.

  The DC voltage converted by the power supply 60 is supplied to the control board 50 via the power supply wiring 61. Then, by a constant current circuit including the transistor 52, the constant current diode 53, the current adjusting variable resistor 55, and the current adjusting fixed resistor 54 of the control board 50, three lines for sucking a current of a constant current value are obtained. It is formed.

  One line connected to the positive side of the DC voltage and three lines for sucking current are connected to each row of the LED elements 21 of the light source unit 100 via the control wiring cable 44.

  Specifically, one line connected to the positive side of the DC voltage is connected to one end of each column of the LED elements 21 of the light source unit 100 and supplies a positive DC voltage. Thereby, a positive DC voltage is supplied to the anode electrode 21a of the LED element 21 located at the uppermost stream of each column. In this case, since the LED elements 21 are connected in series in each row, the anode electrode 21a of the LED element 21 located on the downstream side supplies a voltage from the cathode electrode 21c of the LED element 21 located on the upstream side. Then, the current generated in the LED element 21 is sucked.

  On the other hand, each of the three lines that absorb current is connected to the other end of each column of the LED elements 21 of the light source unit 100 and absorbs current. Thereby, the current from the cathode electrode 21c of the LED element 21 located on the most downstream side of each column is sucked from the collector terminal by the corresponding transistor 52. Note that the current sucked by the transistor 52 is discharged from its emitter terminal. Further, the current value of the sink current can be adjusted by changing the voltage value supplied to the base terminal of each transistor 52.

  Thus, in the present embodiment, the light source board 10 of the light source unit 100 is connected to the control board 50 of the control unit 200 via the control wiring cable 44. As a result, the low-cost and high-environment resistance control wiring cable 44 is used for the connection between the light source unit 100 and the control unit 200 without using the FPC 40 formed of a high-price and low-environment resistance material. be able to. Therefore, it is possible to provide a plant-growing lighting device that is further inexpensive and further excellent in environmental resistance.

  Next, a fourth embodiment of the present invention will be described. In addition, about the thing which has the same structure as the 1st-3rd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Explanation of the same operations and effects as those of the first to third embodiments is also omitted.

  FIG. 12 is a perspective view of a light source unit according to the fourth embodiment of the present invention, and FIG. 13 is a perspective view of a light source substrate to which an FPC is connected according to the fourth embodiment of the present invention.

  In the present embodiment, the light source substrate 10 of the light source unit 100 has a thermally conductive adhesive layer on the second surface, which is the surface opposite to the surface on which the LED elements 21 are disposed, under the metal base 11. A magnetic reinforcing plate 30 as a second substrate fixed through 31 is provided. The magnetic reinforcing plate 30 is formed of a metal material having magnetism and excellent strength such as steel. The heat conductive adhesive layer 31 is made of a heat conductive adhesive in which high heat conductive particles such as alumina and silver are mixed in a main agent such as an epoxy resin and a silicone resin in an amount that does not cause a bonding failure. It is desirable that

  Then, the light source substrate 10 to which the FPC 40 is connected is housed in a moisture-proof transparent moisture-proof film 25 that is processed into a bag shape to fit the light source substrate 10. In addition, the FPC coating | bonding adhesive part 27 is arrange | positioned in the part which this moisture proof film 25 and FPC40 contact. And the opening part of the moisture-proof film 25 is heat-sealed, dehumidifying or deaerating the inside of the moisture-proof film 25. FIG.

  Since the configuration of other points is the same as that of the first and second embodiments, the description thereof is omitted.

  Next, operation | movement of the illuminating device for plant cultivation in this Embodiment is demonstrated.

  The DC voltage converted by the power supply 60 is supplied to the control board 50 via the power supply wiring 61. Then, by a constant current circuit including the transistor 52, the constant current diode 53, the current adjusting variable resistor 55, and the current adjusting fixed resistor 54 of the control board 50, three lines for sucking a current of a constant current value are obtained. It is formed.

  One line connected to the positive side of the DC voltage and three lines for sucking current are connected to each column of the LED elements 21 of the light source unit 100 via the FPC 40.

  Specifically, one line connected to the positive side of the DC voltage is connected to one end of each column of the LED elements 21 of the light source unit 100 and supplies a positive DC voltage. Thereby, a positive DC voltage is supplied to the anode electrode 21a of the LED element 21 located at the uppermost stream of each column. In this case, since the LED elements 21 are connected in series in each row, the anode electrode 21a of the LED element 21 located on the downstream side supplies a voltage from the cathode electrode 21c of the LED element 21 located on the upstream side. Then, the current generated in the LED element 21 is sucked.

  On the other hand, each of the three lines that absorb current is connected to the other end of each column of the LED elements 21 of the light source unit 100 and absorbs current. Thereby, the current from the cathode electrode 21c of the LED element 21 located on the most downstream side of each column is sucked from the collector terminal by the corresponding transistor 52. Note that the current sucked by the transistor 52 is discharged from its emitter terminal. Further, the current value of the sink current can be adjusted by changing the voltage value supplied to the base terminal of each transistor 52.

  Further, since the magnetic reinforcing plate 30 having magnetism and excellent strength is disposed on the back surface of the light emitting surface of the light source unit 100, the light source unit 100 can be easily fixed to an arbitrary place with a magnet or the like. .

  As described above, in the present embodiment, the light source substrate 10 of the light source unit 100 includes the magnetic reinforcing plate 30 fixed to the metal base 11 via the heat conductive adhesive layer 31. Thereby, the light source unit 100 excellent in intensity | strength can be provided. Moreover, since the light source unit 100 can be easily fixed to an arbitrary place with a magnet or the like, it is possible to provide a plant-growing lighting device that is excellent in general usability.

  Next, a fifth embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st-4th embodiment, the description is abbreviate | omitted by providing the same code | symbol. Explanation of the same operations and effects as those of the first to fourth embodiments is also omitted.

  FIG. 14 is a perspective view of a light source unit according to the fifth embodiment of the present invention, and FIG. 15 is a perspective view of a light source substrate to which an FPC is connected according to the fifth embodiment of the present invention.

  In the present embodiment, the light source substrate 10 of the light source unit 100 has a thermally conductive adhesive layer on the second surface, which is the surface opposite to the surface on which the LED elements 21 are disposed, under the metal base 11. A concave magnetic reinforcing plate 32 as a second substrate fixed through 31 is provided. The concave magnetic reinforcing plate 32 has a U-shape with a convex first surface, and is formed of a metal material having magnetism and excellent strength such as steel. The heat conductive adhesive layer 31 is made of a heat conductive adhesive in which high heat conductive particles such as alumina and silver are mixed in a main agent such as an epoxy resin and a silicone resin in an amount that does not cause a bonding failure. It is desirable that

  Then, the light source substrate 10 to which the FPC 40 is connected is housed in a moisture-proof transparent moisture-proof film 25 that is processed into a bag shape to fit the light source substrate 10. In addition, the FPC coating | bonding adhesive part 27 is arrange | positioned in the part which this moisture proof film 25 and FPC40 contact. And the opening part of the moisture-proof film 25 is heat-sealed, dehumidifying or deaerating the inside of the moisture-proof film 25. FIG.

  Since the configuration of other points is the same as that of the first and second embodiments, the description thereof is omitted.

  Next, operation | movement of the illuminating device for plant cultivation in this Embodiment is demonstrated.

  The DC voltage converted by the power supply 60 is supplied to the control board 50 via the power supply wiring 61. Then, by a constant current circuit including the transistor 52, the constant current diode 53, the current adjusting variable resistor 55, and the current adjusting fixed resistor 54 of the control board 50, three lines for sucking a current of a constant current value are obtained. It is formed.

  One line connected to the positive side of the DC voltage and three lines for sucking current are connected to each column of the LED elements 21 of the light source unit 100 via the FPC 40.

  Specifically, one line connected to the positive side of the DC voltage is connected to one end of each column of the LED elements 21 of the light source unit 100 and supplies a positive DC voltage. Thereby, a positive DC voltage is supplied to the anode electrode 21a of the LED element 21 located at the uppermost stream of each column. In this case, since the LED elements 21 are connected in series in each row, the anode electrode 21a of the LED element 21 located on the downstream side supplies a voltage from the cathode electrode 21c of the LED element 21 located on the upstream side. Then, the current generated in the LED element 21 is sucked.

  On the other hand, each of the three lines that absorb current is connected to the other end of each column of the LED elements 21 of the light source unit 100 and absorbs current. Thereby, the current from the cathode electrode 21c of the LED element 21 located on the most downstream side of each column is sucked from the collector terminal by the corresponding transistor 52. Note that the current sucked by the transistor 52 is discharged from its emitter terminal. Further, the current value of the sink current can be adjusted by changing the voltage value supplied to the base terminal of each transistor 52.

  Next, the arrangement | positioning aspect of the light source unit 100 in this Embodiment is demonstrated.

  FIG. 16 is a diagram showing an arrangement mode of light source units in the fifth embodiment of the present invention.

  In the figure, reference numeral 90 denotes a plant grown in a greenhouse for plant growth, which is an object to be irradiated with light from the light source unit 100. Reference numerals 81 to 83 denote first to third support columns disposed at various positions in the vinyl house. A magnet 70 made of a ferrite material, a neodymium material, or the like is attached to the side surfaces of the first to third columns 81 to 83. Therefore, the light source unit 100 can be easily fixed in an arbitrary posture on the side surfaces of the first to third columns 81 to 83 by attracting an arbitrary portion of the concave magnetic reinforcing plate 32 to the magnet 70. Thereby, as shown by the arrows A to C, the light of the light source unit 100 can be irradiated to the plant 90 from any direction.

  As described above, in the present embodiment, the light source substrate 10 of the light source unit 100 includes the concave magnetic reinforcing plate 32 that is fixed to the back surface via the heat conductive adhesive layer 31. Thereby, the light source unit 100 excellent in intensity | strength can be provided. In addition, since the light source unit 100 can be easily fixed at an arbitrary position with the magnet 70 in an arbitrary posture, it is possible to provide a plant-growing lighting device that is highly versatile and has a high degree of freedom.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a figure which shows the structure of the illuminating device for plant cultivation in the 1st Embodiment of this invention. It is a perspective view of the light source unit in the 1st Embodiment of this invention. It is a perspective view of the light source board | substrate in the 1st Embodiment of this invention. It is a perspective view of the light source substrate which mounted the LED element in the 1st Embodiment of this invention. It is a perspective view of the light source substrate which wire-bonded the LED element in the 1st Embodiment of this invention. It is a perspective view of the light source substrate which coat | covered the LED element and wire in the 1st Embodiment of this invention with transparent resin. It is a perspective view of the light source board | substrate which connected FPC in the 1st Embodiment of this invention. It is a figure which shows the circuit structure of the illuminating device for plant cultivation in the 1st Embodiment of this invention. It is a figure which shows the structure of the illuminating device for plant cultivation in the 2nd Embodiment of this invention. It is a figure which shows the structure of the illuminating device for plant cultivation in the 3rd Embodiment of this invention. It is a perspective view of the light source unit in the 3rd Embodiment of this invention. It is a perspective view of the light source unit in the 4th Embodiment of this invention. It is a perspective view of the light source board | substrate which connected FPC in the 4th Embodiment of this invention. It is a perspective view of the light source unit in the 5th Embodiment of this invention. It is a perspective view of the light source board | substrate which connected FPC in the 5th Embodiment of this invention. It is a figure which shows the arrangement | positioning aspect of the light source unit in the 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Light source board | substrate 11 Metal base 12 Insulation layer 13 Opening part 14 Electrode 15 Wiring 16 Taking out terminal 21 LED element 21a Anode electrode 21c Cathode electrode 22 Die bond resin 23 Gold wire 24 Transparent resin 25 Moisture-proof film 30 Magnetic reinforcement board 32 Concave magnetic reinforcement board 40 FPC
50 Control board 60 Power supply 100 Light source unit 200 Control unit

Claims (12)

(A) a first substrate having thermal conductivity;
(B) an electrical wiring composed of an insulating layer and a conductor pattern having a plurality of openings formed on the first surface of the first substrate;
(C) bare chips of a plurality of light emitting diodes fixed with a die bond resin having thermal conductivity in the plurality of openings;
(D) wire wiring for wire-bonding the anode and cathode electrodes formed on each of the bare chips of the light emitting diode and the electrical wiring;
(E) a transparent resin covering the bare chip of all the light emitting diodes and the wire wiring;
(F) a control wiring that is electrically connected to a terminal portion of the electrical wiring and supplies a current and a control signal from an external circuit;
(G) having a moisture resistance and translucency and having a composite film processed into a bag shape;
(H) The first substrate is housed in the composite film bag, the side of the control wiring not connected to the terminal portion extends out from the composite film bag, and the composite film bag is provided. Is an LED light source device for plant growth characterized in that the inside is deaerated and the periphery is sealed. The bare chip of the plurality of light emitting diodes has a light emitting diode that emits infrared light having a wavelength of 710 to 800 nanometers, a light emitting diode that emits red light having a wavelength of 620 to 710 nanometers, and a wavelength of 500 to 580 nanometers. 2. The plant according to claim 1, which is a light emitting diode emitting green light, a light emitting diode emitting blue light having a wavelength of 450 to 500 nanometers, or a bare chip of a light emitting diode emitting ultraviolet light having a wavelength of 280 to 450 nanometers. LED light source device for breeding. The plant light source LED light source device according to claim 2, wherein the bare chips of the plurality of light emitting diodes are bare chips of light emitting diodes having the same emission color. The plant light source LED light source device according to claim 1, wherein the plurality of openings are arranged at intervals in the matrix direction. The plant light source LED light source device according to claim 4, wherein the bare chips of the plurality of light-emitting diodes fixed in the plurality of openings and arranged at intervals in the column direction are electrically connected in series. (A) a first substrate having thermal conductivity;
(B) an electrical wiring composed of an insulating layer and a conductor pattern having an opening formed in the first surface of the first substrate;
(C) a bare chip of a light emitting diode fixed with a die bond resin having thermal conductivity in the opening;
(D) wire wiring for wire bonding connecting the anode and cathode electrodes formed on the bare chip of the light emitting diode and the electrical wiring;
(E) a transparent resin that covers the bare chip of the light emitting diode and the wire wiring;
(F) a control wiring that is electrically connected to a terminal portion of the electrical wiring and supplies a current and a control signal from an external circuit;
(G) a second substrate having magnetism and rigidity;
(H) having a moisture resistance and translucency, and having a composite film processed into a bag shape,
(I) In the first substrate and the second substrate, the second surface of the first substrate and the first surface of the second substrate are fixed to each other with an adhesive having thermal conductivity. The side of the control wiring that is not connected to the terminal portion extends out of the composite film bag, and the composite film bag is degassed and sealed around the inside. An LED light source device for plant cultivation characterized by being worn. The said 2nd board | substrate is a LED light source device for plant cultivation of Claim 6 provided with the U-shaped shape from which a 1st surface becomes convex shape. The light emitting diode bare chip emits an infrared light emitting diode having a wavelength of 710 to 800 nanometers, a red light emitting diode having a wavelength of 620 to 710 nanometers, and emits a green light having a wavelength of 500 to 580 nanometers. The plant growing LED according to claim 6, which is a light emitting diode that emits blue light having a wavelength of 450 to 500 nanometers, or a bare chip of a light emitting diode that emits ultraviolet light having a wavelength of 280 to 450 nanometers. Light source device. The LED light source device for plant cultivation according to claim 8, wherein the bare chips of the light emitting diodes are bare chips of light emitting diodes having the same emission color. The plant light source LED light source device according to claim 6, wherein there are a plurality of the openings, and the openings are arranged at intervals in the matrix direction. The LED light source device for plant growth according to claim 10, wherein the bare chips of the light emitting diodes fixed to each of the plurality of openings and arranged at intervals in the column direction are electrically connected in series. An LED light source device for plant growth according to any one of claims 1 to 11,
A plant growth illumination comprising a control unit connected to the plant growth LED light source device via the control wiring, including a power source and a control circuit, and driving the plant growth LED light source device with a constant current. apparatus.

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