JP4960916B2 - LIGHTING DEVICE AND LIGHTING DEVICE MANUFACTURING METHOD - Google Patents

Description

  The present invention relates to a lighting device and a method for manufacturing the lighting device, and more particularly to a lighting device for plant growth using a light emitting element and a method for manufacturing the lighting device.

  In recent years, lighting devices using organic EL (EL) elements as light emitting elements have been developed for practical use. On the other hand, regarding plant growth, it has been studied to use artificial light other than natural light, and it is known to apply organic EL illumination as artificial light (see, for example, Patent Document 1).

  Conventionally, lighting for growing plants has been of a light bulb type or a fluorescent lamp type, and the watering pipes and watering ports are generally laid out separately from the lighting. In this case, depending on the configuration of the spatial arrangement of the lighting device, it is difficult to freely lay out the watering pipes and watering ports.

 When organic EL illumination is used for the lighting device, the thickness of the lighting device can be reduced, so that the degree of freedom in the method of arranging the lighting device is increased. However, even in this case, there is a problem that the watering pipe and the watering port need to be separately laid out.

On the other hand, organic EL lighting has good luminous efficiency and emits light on its surface, so that heat generation per unit area is extremely small compared to incandescent lamps and fluorescent lamps. However, there is a problem that heat generation in long-time use cannot be ignored and the life of the organic EL element is shortened.
JP 2005-80608 A

  An object of the present invention is to provide a lighting device and a method for manufacturing the lighting device that can efficiently remove heat from the light emitting device and improve the lifetime of the light emitting device.

  Another object of the present invention is to provide a lighting device and a method for manufacturing the lighting device in which a watering nozzle and a predetermined sensor can be arranged at desired positions, and the degree of freedom in layout is increased.

  According to one embodiment of the present invention for achieving the above object, the light emitting device includes a plurality of light emitting elements and a plurality of mounting holes, and has a flow path communicating with the mounting holes on one main surface, And a holding member having the light emitting element arranged at least opposite to each other on the main surface, and the mounting hole is arranged in a region between the adjacent light emitting elements. An apparatus is provided.

  According to another aspect of the present invention, after forming the anode layer, the organic light emitting layer and the insulating layer on the substrate, forming the cathode layer, filling the sealing plate with the filler, Sealing the substrate via a sealing material, forming an organic light emitting element by sandwiching an end of the substrate with a clip having a lead pin, forming a channel in a holding member, A step of forming an attachment hole and a pin insertion hole in the holding member; a step of inserting the lead pin into the pin insertion hole and attaching the water emitting nozzle to the attachment hole after attaching the organic light emitting element to the holding member; The manufacturing method of the illuminating device characterized by having is provided.

  According to the illumination device and the method for manufacturing the illumination device of the present invention, it is possible to efficiently remove heat from the light emitting element, and it is possible to improve the life of the light emitting element. Further, the watering nozzle and the predetermined sensor can be arranged at desired positions, and the degree of freedom in layout can be increased.

  Hereinafter, a lighting device according to an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, differ from actual ones, and also include portions having different dimensional relationships and ratios between the drawings.

[First embodiment]
(Structure of lighting device)
The lighting device according to the first embodiment of the present invention has a plurality of light emitting elements 20 and a plurality of mounting holes 21 as shown in FIGS. A path 16 is provided on one main surface, and a holding member 15 having a light emitting element 20 disposed at least opposite to the flow path 16 is provided on the other main surface, and in a region between adjacent light emitting elements 20. A mounting hole 21 is disposed. 1 is a cross-sectional structural view taken along the line II of FIG. 2, and FIG. 2 is a structural view seen from the substrate 1 side.

  According to the present embodiment, the light emitting element 20 may be the organic light emitting element 20 including the organic light emitting layer 3 sandwiched between the pair of electrodes (2, 4). Hereinafter, an example in which an organic light emitting element is applied as the light emitting element 20 will be described.

  The surface of the organic light emitting element 20 on the cathode layer 4 side is sealed by the sealing plate 10 except for the anode terminal 6 and the cathode terminal 7. The anode terminal 6 and the cathode terminal 7 exposed at the end of the organic light emitting element 20 are sandwiched together with the end of the organic light emitting element 20 by the clips (18, 19), and are connected to the lead pins (13, 19) via the clips (18, 19). 14) can be electrically connected.

  The holding member 15 is for holding the plurality of organic light emitting elements 20 and attaching the watering nozzle 17 and the predetermined sensor 28. The holding member 15 also has a function of removing heat from the organic light emitting element 20. For this reason, it is good for the holding member 15 to be a thing with high heat conductivity, for example, consists of metals, such as aluminum and copper. The thickness is, for example, about 2 to 20 mm, preferably about 5 to 15 mm.

  The holding member 15 may have a pin insertion hole (22, 23), and the lead plate (13, 14) is inserted into the pin insertion hole (22, 23) to thereby seal the sealing plate 10 of the organic light emitting element 20. The organic light emitting element 20 can be held by bonding the side surface to the surface of the holding member 15. The holding member 15 can also hold the organic light emitting element 20 by bonding it with an adhesive or the like.

  As shown in FIG. 2, the organic light emitting elements 20 are disposed adjacent to each other, and the attachment holes 21 are disposed in a region between the adjacent organic light emitting elements 20. The watering nozzle 17 and a predetermined sensor 28 are attached to the mounting hole 21. Examples of the predetermined sensor 28 include a sensor that measures the temperature and humidity of the surrounding environment, the height of a plant, and the like. Moreover, a sealing plug (schematically illustrated) can be appropriately attached to the attachment hole 21. The mounting hole 21 has a screw shape or a cylindrical shape, and the inner diameter is, for example, about 1 to 3 cm.

  The flow path 16 arranged on one main surface of the holding member 15 is for circulating water for watering. The water for water spraying flowing through the flow path 16 also has a heat removal function, and removes heat generated in the organic light emitting element 20 through the holding member 15.

  The shape of the flow path 16 is not particularly limited, but the cross section may have a shape such as a substantially rectangular shape, a substantially semicircular shape, or a substantially oval shape. Further, the flow paths 16 are preferably arranged in a lattice shape so as to face the organic light emitting elements 20 arranged on the other main surface of the holding member 15. Thereby, the heat generated by the organic light emitting element 20 can be efficiently removed. The channel 16 may have a width of, for example, about 1 to 2 cm and a depth of, for example, about 1 to 10 mm depending on the thickness of the holding member 15. The flow path 16 communicates with the mounting hole 21, and water flowing through the flow path 16 can be sprinkled outside through the watering nozzle 17 disposed in the mounting hole 21. The opening of the channel 16 is preferably sealed with a plate made of resin, metal or the like in order to seal water.

  According to the present embodiment, as shown in FIG. 3, the lighting device 30 is disposed, for example, above the plant 24 grown in the cultivation container 29, and the organic light emitting element 20 is used using the predetermined sensor 28. While irradiating light, watering is performed from the watering nozzle 17.

  Since the organic light emitting element 20 is configured such that light is extracted from the substrate 1 side, the substrate 1 is a transparent substrate that transmits light such as a glass substrate.

  The substrate 1 preferably has a substantially rectangular shape in plan view. Lead pins (13, 14) are arranged via clips (18, 19) on at least two sides or two corners of the rectangle, respectively.

  The anode layer 2 is made of a transparent electrode made of ITO (indium-tin oxide) having a thickness of about 150 to 160 nm, for example, like the substrate 1 and capable of transmitting light.

  In the organic light emitting layer 3, a hole transport layer, a light emitting portion, and an electron transport layer are sequentially laminated from the substrate 1 side.

  The hole transport layer is for smoothly transporting holes injected from the anode layer 2 to the light emitting part, and has a thickness of, for example, NPB (N, N-di (naphthalyl)-) of about 60 nm. N, N-diphenyl-benzidene).

The electron transport layer is for smoothly transporting electrons injected from the cathode layer 4 to the light emitting portion, and is made of, for example, Alq ₃ (aluminum quinolinol complex) having a thickness of about 35 nm.

The light emitting part is for recombination of injected holes and electrons to emit light, and has a thickness doped with, for example, about 1% of a coumarin compound (C ₅₄₅ T) as a light emitting species, for example, about It consists of Alq _{3 of} about 30 nm.

  In addition, you may comprise the organic light emitting layer 3 using layers other than the said positive hole transport layer and an electron carrying layer, for example, a positive hole injection layer, an electron injection layer, etc.

  The cathode layer 4 is made of aluminum having a thickness of about 150 nm, for example.

  The insulating layer 5 can be made of an inorganic material such as silicon oxide or silicon nitride, or an organic material such as polyimide.

The sealing materials (8, 9) are for preventing moisture from entering the organic light emitting element 20, and use a resin such as a UV curable resin or an epoxy adhesive resin.
The sealing plate 10 protects the anode layer 2, the cathode layer 4, and the organic light emitting layer 3, and seals them. Examples of the material of the sealing plate 10 include glass, metals such as stainless steel (SUS) and copper, and ceramics.

  The filler 11 is for transmitting Joule heat generated in the organic light emitting layer 3 to the sealing plate 10 side to dissipate heat. As the filler 11, it is preferable to use a resin such as a UV curable resin or an epoxy resin.

  The lead pins (13, 14) are for attaching the substrate 1 to the holding member 15 and electrically connecting the organic light emitting element 20 and external electrode terminals (not shown). The lead pins (13, 14) are preferably covered with an insulating film (not shown) in order to insulate from the holding member 15. The material of the lead pins (13, 14) is preferably made of a metal having a spring property. For example, oxygen-free copper, brass, phosphor bronze, silver-plated copper and the like can be mentioned.

  The clips (18, 19) sandwich the end of the substrate 1 and electrically connect the anode terminal 6 and the cathode terminal 7 to the lead pins (13, 14). The clips (18, 19) are preferably joined integrally with the lead pins (13, 14). The material of the clip (18, 19) is preferably made of a metal having a spring property, and examples thereof include copper, brass, nickel-plated steel and the like.

  The lead pins (13, 14) can be connected to the anode terminal 6 and the cathode terminal 7 through solder.

(Operating principle)
The operation principle of the lighting apparatus according to the first embodiment is as follows.

  First, a constant voltage is applied between the anode layer 2 and the cathode layer 4 from the external electrode via the lead pins (13, 14), the anode terminal 6, and the cathode terminal 7 of the organic light emitting element 20. Thereby, holes are injected from the anode layer 2 into the light emitting part through the hole transport layer, and electrons are injected from the cathode layer 4 into the light emitting part through the electron transport layer. Then, the holes and electrons injected into the light emitting portion recombine to emit light. The emitted light is emitted to the outside through the substrate 1 and irradiates the plant 24. On the other hand, water for watering is sent to the flow path 16 at a predetermined timing, and watered to the plant 24 from the watering nozzle 17.

(Production method)
As shown in FIGS. 4 and 5, the manufacturing method of the lighting device according to the first embodiment forms the anode layer 2, the organic light emitting layer 3, and the insulating layer 5 on the substrate 1, and then forms the cathode layer 4. A step of forming, a step of sealing the sealing plate 10 on the substrate 1 with a sealing material (8, 9) after the filler 11 is filled in the sealing plate 10, and an anode terminal 6 and a cathode terminal 7 Are sandwiched by clips (18, 19) having lead pins (13, 14) to form the organic light emitting device 20, a step of forming the flow path 16 in the holding member 15, a mounting hole 21 in the holding member 15 and After forming the pin insertion holes (22, 23) and inserting the lead pins (13, 14) into the pin insertion holes (22, 23) and attaching the organic light emitting element 20 to the holding member 15, the watering nozzle 17 And attaching to the attachment hole 21.

  Below, a manufacturing process is explained in full detail.

(A) First, as shown in FIG. 4A, after the anode layer 2 on the substrate 1 is patterned and etched, a hole transport layer, a light-emitting portion, and an electron transport layer are sequentially formed by vacuum deposition or the like. The organic light emitting layer 3 is formed by filming. Next, after forming the insulating layer 5 made of silicon oxide by a CVD (Chemical Vapor Deposition) method or the like, the cathode layer 4 is formed by sputtering or the like.

(B) Next, as shown in FIG. 4B, after applying the filler 11 and the sealing material (8, 9), the sealing plate 10 is applied to the substrate 1 except for the anode terminal 6 and the cathode terminal 7. Adhere and seal.

(C) Next, as shown in FIG. 4 (c), the lead pins (13, 14) whose surfaces are covered with a resin (illustrated) or the like through the anode terminal 6 and the cathode terminal 7 as shown in FIG. The organic light emitting device 20 is manufactured by sandwiching and fixing the clip with clips (18, 19).

(D) Next, as shown in FIG. 5D, for example, the cross section of the surface of the holding member 15 made of aluminum is substantially reduced by, for example, milling, laser processing, or etching using photolithography. The rectangular flow paths 16 are formed in a lattice shape.

(E) Next, as shown in FIG. 5 (e), the attachment hole 21 and the pin insertion holes (22, 23) are formed in the holding member 15 by drilling, laser processing, or the like.

(F) Finally, as shown in FIG. 5 (f), the lead pins (13, 14) are inserted into the pin insertion holes (22, 23) to fix the organic light emitting element 20 to the holding member 15, and then the mounting holes 21. The watering nozzle 17 is inserted into the illuminating device 30 to complete the lighting device 30 shown in FIG.

  According to the present embodiment, since the predetermined sensor 28 is used to irradiate light from the organic light emitting element 20 and to spray water from the watering nozzle 17, it becomes possible to appropriately control light irradiation and water supply. Good plant growth is possible.

  In addition, since water for watering flows through the flow path 16, the organic light emitting element 20 can be efficiently removed through the holding member 15.

  Moreover, since the attachment hole 21 is arrange | positioned between the adjacent organic light emitting elements 20, it becomes possible to attach the watering nozzle 17 and the predetermined sensor 28 easily, and can simplify a manufacturing process.

  According to the lighting device and the method for manufacturing the lighting device according to the present embodiment, it is possible to efficiently remove heat from the organic light emitting element 20 and improve the life of the organic light emitting element 20. Further, the watering nozzle 17 and the predetermined sensor 28 can be arranged at desired positions, and the degree of freedom in layout can be increased.

[Second Embodiment]
As shown in FIG. 6, the lighting device according to the second embodiment of the present invention has a plurality of light emitting elements 20 and a plurality of mounting holes 21, and a flow path 16 communicating with the mounting holes 21. The holding member 15 having the light emitting element 20 provided on one main surface and disposed on the other main surface so as to be opposed to each other at least is provided, and a mounting hole 21 is provided in a region between the adjacent light emitting elements 20. Is placed. The flow path 26 is formed in the piping 25 arrange | positioned on one main surface, and the piping 25 is arrange | positioned at a grid | lattice form. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  The pipe 25 is for circulating water for watering. The shape of the pipe 25 is not particularly limited, but the cross-sectional shape may be, for example, a substantially cylindrical shape, a substantially elliptical frame shape, or a substantially rectangular frame, and the organic material disposed on the other main surface of the holding member 15. It is preferable that the light emitting elements 20 be arranged in a grid so as to face the light emitting elements 20. The material of the pipe 25 is preferably conductive, and for example, a metal such as aluminum or copper, a resin, or the like can be used.

  The pipe 25 is preferably fixed on the holding member 15 by a fixing member 27 made of resin or metal.

  The manufacturing method of the lighting device according to the present embodiment is different from the manufacturing method according to the first embodiment in the method of forming the pipe 25, and the others are the same as those in the first embodiment. The description which was made is abbreviate | omitted.

  In the method for manufacturing the lighting device according to the present embodiment, a pipe 25 made of substantially cylindrical aluminum having a cross-sectional shape of, for example, an inner diameter of about 1 cm and a thickness of about 0.1 cm is formed on the surface of the holding member 15 in a lattice shape. To form. Next, the pipe 25 branched from the side surface of the pipe 25 is formed so as to communicate with the mounting hole 21. And the illumination device 30A shown in FIG. 6 can be manufactured by fixing the piping 25 with the fixing member 27 made of resin.

  According to the present embodiment, since the pipe 25 is used to form the flow path 26, the manufacturing process can be simplified.

  According to the lighting device and the method for manufacturing the lighting device according to the present embodiment, it is possible to efficiently remove heat from the organic light emitting element 20 and improve the life of the organic light emitting element 20. Further, the watering nozzle 17 and the predetermined sensor 28 can be arranged at desired positions, and the degree of freedom in layout can be increased.

[Other embodiments]
The present invention has been described in detail with the first and second embodiments described above. However, for those skilled in the art, the present invention is limited to the first and second embodiments described in the present specification. Obviously it is not. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention. Hereinafter, a modified embodiment in which the first and second embodiments described above are partially modified will be described.

  In the illuminating device according to the first embodiment described above, an explanation has been given using an organic light emitting element as the light emitting element 20, but a light emitting diode (LED: Light Emitting Diode) or a laser diode (LD: Laser Diode) Also good.

1 is a schematic cross-sectional structure diagram of a lighting device according to a first embodiment of the present invention. FIG. 2 is a schematic bottom view of FIG. 1. The typical side view which shows an example of use of the illuminating device which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the manufacturing method of the illuminating device which concerns on the 1st Embodiment of this invention, Comprising: (a) After forming the anode layer 2, the organic light emitting layer 3, and the insulating layer 5 on the board | substrate 1, the cathode layer 4 (B) a process diagram for sealing the sealing plate 10 on the substrate 1 with a sealing material (8, 9) after filling the sealing material 10 with the filler 11; and (c). Process drawing which clamps the edge part of the board | substrate 1 with the clip (18, 19) which has a lead pin (13, 14). It is explanatory drawing of the manufacturing method of the illuminating device concerning the 1st Embodiment of this invention, Comprising: (d) Process drawing which forms the flow path 16 in the holding member 15, (e) The attachment hole 21 and the holding member 15 and Process drawing for forming pin insertion holes (22, 23), (f) After inserting the lead pins (13, 14) into the pin insertion holes (22, 23) and attaching the organic light emitting element 20 to the holding member 15, The process figure which attaches the watering nozzle 17 to the attachment hole 21. FIG. The typical cross-section figure of the illuminating device which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Board | substrate 2 ... Anode layer 3 ... Organic light emitting layer 4 ... Cathode layer 5 ... Insulating layer 6 ... Anode terminal 7 ... Cathode terminal 8, 9 ... Sealing material DESCRIPTION OF SYMBOLS 10 ... Sealing plate 11 ... Filler 13, 14 ... Lead pin 15 ... Holding member 16, 26 ... Flow path 17 ... Watering nozzle 18, 19 ... Clip 20 ... -Organic light emitting element 21 ... Mounting holes 22, 23 ... Pin insertion hole 24 ... Plant 25 ... Pipe 27 ... Fixing member 28 ... Sensor 29 ... Cultivation container 30, 30A ..Lighting devices

Claims (6)

A plurality of light emitting elements;
It has a plurality of mounting holes, has a flow channel communicating with the mounting holes on one main surface, and has the light emitting element disposed on the other main surface so as to face the flow channel at least mutually. And a holding member, wherein the mounting hole is disposed in a region between the adjacent light emitting elements.   The lighting device according to claim 1, wherein the light emitting element is an organic light emitting element including an organic light emitting layer sandwiched between a pair of electrodes.   The lighting device according to claim 1, further comprising a watering nozzle disposed in the mounting hole and a predetermined sensor.   The lighting device according to claim 1, wherein the flow path has a groove-like cross section and is arranged in a lattice shape.   The said flow path is formed in the piping arrange | positioned on said one main surface, This piping is arrange | positioned at the grid | lattice form, The any one of Claims 1-3 characterized by the above-mentioned. Lighting device. Forming a cathode layer after forming an anode layer, an organic light emitting layer and an insulating layer on a substrate;
After filling the sealing plate with the filler, sealing the sealing plate on the substrate via a sealing material;
Forming an organic light emitting device by sandwiching the end of the substrate with a clip having a lead pin;
Forming a flow path in the holding member;
Forming a mounting hole and a pin insertion hole in the holding member;
And a step of attaching a watering nozzle to the attachment hole after the lead pin is inserted into the pin insertion hole and the organic light emitting element is attached to the holding member.

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