JP2012238575A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact lighting device that can maintain cooling efficiency at a light-emitting part.SOLUTION: The lighting device includes an electroluminescent panel of a surface light emitter, and a housing zoning an inner space by barrier ribs including the electroluminescent panel. On the electroluminescent panel, a plurality of through-holes passing through from the inner space toward outside are provided. An inner wall surface of each through-hole is protected by a dampproof barrier film.

Description

  The present invention relates to a lighting device using an electroluminescence panel.

  In recent years, as an electroluminescence panel, an organic compound having charge transportability (hole or electron mobility), which has achieved higher luminance and higher luminous efficiency than inorganic electroluminescence elements (hereinafter referred to as inorganic EL elements), has been used. An organic electroluminescence element (hereinafter referred to as an organic EL element) provided with a plurality of organic material layers has attracted attention. Organic EL elements as flexible thin surface light sources are rapidly put into practical use in the fields of mobile phones, car navigation systems, and TV displays, and are applied to special lighting such as endoscopes. Further, LEDs as point light sources are also increasingly applied to lighting devices. For example, a blower outlet integrated LED lighting device is proposed in which a thin LED lighting device is fixed to a frame of an air conditioning suction port or a blower outlet to form a rectangular air conditioning suction port or blower device as a whole (Patent Document 1). ,reference). Further, in the organic EL element, the EL is provided so as to surround the opening (air duct or water duct) provided in the handpiece head for attaching / detaching a medical tool or for taking out or entering a work medium. A medical device for dentistry provided with a surface emitting light source of an element has been proposed (refer to Patent Document 2), an illuminating means for an organic EL element, a light receiving portion, and a through-hole for inserting a treatment instrument An endoscope tip has been proposed in which the illumination means is formed so as to avoid the light receiving part and the through hole (having an opening at the light receiving part and the through hole) (Patent Document 3, And a surface emitting device for a ceramic filter in which a plurality of through holes serving as fluid flow paths are formed in a direction perpendicular to the surface of a surface light emitter having a function of emitting ultraviolet rays (Patent Literature). 4)) for special lighting fields It has been applied.

JP 2008-117678 A JP 2010-227157 A JP 2010-46282 A International Publication No. 2005/123246

  Conventionally, clean rooms that remove dust are used to improve the quality of precision products for applications such as electronics, precision machinery, and precision printing, and improve yields. In order to cut off the contained ultraviolet rays, generally, the outer surface of the glass tube of a fluorescent lamp is covered with a yellow tube to absorb light having a wavelength of 500 nm or less and ultraviolet rays. For this reason, the interior of the clean room is yellow.

  In a clean room, the lighting device and the blower are separate devices, and it is desirable to integrate them in order to effectively use the ceiling space. In such a clean room lighting device, only a part of the light that can be used by covering the yellow tube is used, and the light use efficiency deteriorates. Further, conventional fluorescent lamps, light bulbs and the like cannot provide a ventilation hole on the light emitting surface, so the cooling efficiency of the light emitting unit is low, and the light emitting unit and the air blowing unit become different devices and take up space.

  However, the illumination techniques disclosed in Patent Documents 1 to 4 do not use ultraviolet rays, and are not considered for effective use of space and improvement of cooling efficiency.

  Therefore, in the present invention, providing a compact lighting device that can maintain the cooling efficiency of the light emitting section is an example of the problem.

  An illuminating device according to the present invention is an illuminating device including a surface light emitter and a housing that defines an internal space by a partition including the surface light emitter, and the surface light emitter has a transmissive substrate and is visible. An electroluminescence panel that emits light in a planar shape, the electroluminescence panel having a plurality of through holes penetrating from the internal space to the outside, and an inner wall surface of the through hole being protected by a moisture-proof barrier film It is characterized by.

It is a general | schematic partially notched perspective view which shows the illumination panel with a ventilation hole which is the illuminating device of embodiment by this invention. It is a general | schematic fragmentary top view which shows the organic electroluminescent panel of embodiment by this invention. It is sectional drawing of the AA line in FIG. It is sectional drawing of the BB line in FIG. It is a general | schematic fragmentary sectional view which shows the organic EL element of embodiment by this invention. It is a general | schematic partially notched perspective view which shows the illumination panel with a ventilation hole which is the illuminating device of other embodiment by this invention. It is a general | schematic partially notched perspective view which shows the illumination panel with a ventilation hole which is the illuminating device of other embodiment by this invention. It is a top view which shows the illuminating device of other embodiment by this invention. It is sectional drawing of the AA line in FIG. It is a general | schematic fragmentary top view which shows the organic electroluminescent panel of other embodiment by this invention. It is a general | schematic fragmentary top view which shows the inorganic EL panel of other embodiment by this invention.

  Embodiments according to the present invention will be described below with reference to the drawings.

[Lighting device]
FIG. 1 shows an illumination panel device 1 with an air blowing hole of this embodiment using an organic EL panel as an electroluminescence panel. As the main body of the lighting panel, a plate-shaped organic EL panel 2 which is a surface light emitter is used. The organic EL panel 2 is provided with a plurality of through holes 4 formed on the surface thereof and penetrating from the internal space to the outside. The lighting panel device 1 with a ventilation hole includes a housing 5 that defines an internal space by a partition including an organic EL panel 2. Air 3 from a blower (not shown) is supplied to the housing 5 through the conduit 6, and air is blown from the through holes 4. The outer surface of the organic EL panel 2 other than the through holes 4 emits light and is used as illumination. As shown in FIG. 1, a dust air filter F such as a high efficiency particulate air (HEPA) filter or an ultra low penetration air (ULPA) filter may be provided in the internal space of the housing 5 so as to face the through hole 4 in parallel. it can.

  FIG. 2 is a schematic partial plan view showing the organic EL panel 2 of the lighting panel with blower holes of the present embodiment. 3 is a cross-sectional view taken along the line AA in FIG. 4 in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line BB in FIG.

  As shown in FIGS. 3 and 4, the surface-emitting organic EL panel 2 includes a transmissive substrate 20, a transmissive first electrode 21, and a light-reflective second electrode 22 formed thereon. It has a plurality of organic material layers 23 including a light emitting layer of at least one kind of light emitting color disposed between them. The substrate 20 supports the first electrode 21 and emits visible light in a planar shape from the substrate 20 side. As described above, the embodiment according to the present invention is a lighting device including the organic EL panel 2 and the housing 5 that defines the internal space by the partition including the organic EL panel 2. A protective layer 24 is provided on the second electrode 22 side, and the organic EL panel 2 is formed in a laminated structure. As shown in FIG. 4, the inner wall surfaces of the through holes 4 of the organic EL panel 2 are all protected by a protective film P such as a moisture barrier film.

  Since a plurality of through holes 4 are provided on the surface of the planar organic EL panel 2 and the openings are used as blowers, when this embodiment is used in a clean room, a yellow filter is not required. The structure becomes simple. Since the illumination and ventilation can be performed by the same device, the space utilization efficiency of the clean room is excellent. By blowing air, the temperature of the organic EL panel 2 is lowered and the light emission life is extended.

[Organic EL panel]
Hereinafter, an example of the organic EL panel 2 according to the present embodiment will be described in detail. As shown in FIG. 5, on a transparent substrate 20 such as glass, a transparent anode 21 (first electrode), a hole injection layer 33, a hole transport layer 34, a light emitting layer 35, and a hole blocking layer 36 are sequentially formed. , An electron transport layer 37, an electron injection layer 38, and a cathode (second electrode) 22 made of metal are stacked. The hole injection layer 33, the hole transport layer 34, the light emitting layer 35, the hole blocking layer 36, and the electron transport layer 37 are the organic material layer 23. That is, in the organic EL element, a plurality of organic material layers stacked between a pair of opposing anodes and cathodes are a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, Includes an electron injection layer. These components such as the organic material layer will be described later. As described above, each organic EL element of the organic EL panel is an organic EL element provided with a plurality of organic material layers including a light emitting layer, which are stacked between a pair of opposed anodes and cathodes. Note that any organic material layer such as a light emitting layer, a hole injection layer, and a hole transport layer can be formed by a dry film forming method such as a vacuum evaporation method or a wet coating method such as an ink jet method.

  Note that the separator of each layer shown in FIG. 5 is represented by “/”, and anode 21 / hole injection layer 33 / hole transport layer 34 / light emitting layer 35 / hole blocking layer 36 / electron transport layer 37 / electron injection In addition to the configuration of the layer 38 / cathode 22 /, although not shown, the anode 21 / hole injection layer 33 / light emitting layer 35 / electron transport layer 37 / electron injection layer 38 / cathode 22 / hole transport layer 34, positive Although not shown, the hole blocking layer 36 is omitted, and although not shown, the anode 21 / hole transport layer 34 / light emitting layer 35 / electron transport layer 37 / electron injection layer 38 / cathode 22 / hole injection layer 33, hole blocking Although the configuration in which the layer 36 is omitted or not shown, the positive hole injection layer 33, the positive hole transport layer 34, the positive hole blocking layer 36 of the anode 21 / light emitting layer 35 / electron transport layer 37 / electron injection layer 38 / cathode 22 / A configuration in which is omitted is also included in the present invention. Moreover, in the layer structure demonstrated above, it is also possible to laminate | stack components other than a board | substrate in reverse order. In any case, the present invention is not limited to these stacked structures, and includes a structure including at least a light-emitting layer or a charge transport layer that can also be used.

[substrate]
As the substrate 20, a quartz or glass plate, a metal plate or a metal foil, a resin substrate to be bent, a plastic film, a sheet, or the like is used. In particular, a glass plate or a transparent synthetic resin plate such as polyester, polymethacrylate, polycarbonate, or polysulfone is preferable. When using a synthetic resin substrate, it is necessary to pay attention to gas barrier properties. If the gas barrier property of the substrate is too small, the organic EL element may be deteriorated by the outside air that has passed through the substrate. For this reason, a method of providing a gas barrier property by providing a dense silicon oxide film or the like on at least one surface of the synthetic resin substrate is also a preferable method.

[Anode and cathode]
The anode 21 that supplies holes to the layers up to the light emitting layer is usually a metal such as aluminum, gold, silver, nickel, palladium, platinum, or a metal such as indium and / or tin, zinc oxide (ITO or IZO). It is composed of an oxide, a metal halide such as copper iodide, carbon black, or a conductive polymer such as poly (3-methylthiophene), polypyrrole, or polyaniline.

  In general, the anode is often formed by a sputtering method, a vacuum deposition method, or the like. In addition, when forming an anode using fine metal particles such as silver, fine particles such as copper iodide, carbon black, conductive metal oxide fine particles, or conductive polymer fine powder, an appropriate binder resin solution is used. The anode can also be formed by dispersing and coating the substrate. Further, in the case of a conductive polymer, a thin film can be directly formed on the substrate by electrolytic polymerization, or the anode can be formed by applying a conductive polymer on the substrate.

  The anode usually has a single-layer structure, but it can also have a laminated structure composed of a plurality of materials if desired.

  The thickness of the anode varies depending on the required transparency. When transparency is required, the visible light transmittance is usually 60% or more, preferably 80% or more. In this case, the thickness of the anode is usually 5 nm or more, preferably 10 nm or more, and is usually 1000 nm or less, preferably about 500 nm or less. If it may be opaque, the thickness of the anode is arbitrary, and the anode may be integrated with the substrate 20. Furthermore, different conductive materials may be laminated.

  For the purpose of removing impurities adhering to the anode and adjusting the ionization potential to improve the hole injection property, the anode surface is subjected to ultraviolet (UV) treatment or ozone treatment, oxygen plasma or argon plasma surface treatment, etc. It is preferable to do.

  As a material of the cathode 22 for supplying electrons to the layers up to the light emitting layer, a material used for the anode can be used. However, in order to perform electron injection efficiently, a metal having a low work function is preferable. A suitable metal such as tin, magnesium, indium, calcium, aluminum, silver, or an alloy thereof is used. Specific examples include low work function alloy electrodes such as magnesium-silver alloy, magnesium-indium alloy, and aluminum-lithium alloy.

  In addition, the material of the cathode 22 may use only 1 type, and may use 2 or more types together by arbitrary combinations and a ratio. The thickness of the cathode is usually the same as that of the anode.

  Further, for the purpose of protecting the cathode made of a low work function metal, it is preferable to further stack a metal layer having a high work function and stable to the atmosphere because the stability of the device is increased. For this purpose, for example, metals such as aluminum, silver, copper, nickel, chromium, gold, platinum are used. In addition, these materials may be used only by 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

  Further, when the anode and the cathode are on the light emission extraction side, the materials and film thicknesses are selected so as to be transparent or translucent. In particular, for either the anode or the cathode, it is preferable to select a material having a transmittance of at least 10% at the emission wavelength obtained from the organic light emitting material. These electrodes may be patterned as necessary.

[Organic material layer]
The organic material layer constituting the main components of the hole injection layer 33, the hole transport layer 34, the light emitting layer 35, the electron transport layer 36 and the electron injection layer 37 has a charge transport property (hole and / or electron mobility). An organic compound having

  Examples of phosphorescent organometallic complex compounds used as the light-emitting layer 35 include Bis (3,5-difluoro-2- (2-pyridyl) phenyl- (2-carboxypyridyl) iridium III, Tris (2-phenylpyridine), which are iridium complexes. ) iridium (III) = (Ir (ppy) 3), Bis (2-phenylbenzothiazolato) (acetylacetonate) iridium (III), Osmium (II) bis (3-trifluoromethyl -5- (2-pyridyl)- pyrazolate) dimethylphenylphosphine, rare earth compound Tris (dibenzoylmethane) phenanthroline europium (III), platinum complex 2,3,7,8,12,13,17,18-Octaethyl-21H, 23H- porphine, platinum (II), etc. The light emitting layer 35 may include at least one kind of light emitting layer, and may be a mixed light emitting color or a multi-layered light emitting layer.

  Moreover, as an organic compound having an electron transport property as a main component of the light emitting layer or the electron injection layer, polycyclic compounds such as p-terphenyl and quaterphenyl and derivatives thereof, naphthalene, tetracene, pyrene, coronene, chrysene, Condensed polycyclic hydrocarbon compounds such as anthracene, diphenylanthracene, naphthacene, phenanthrene and their derivatives, condensed heterocyclic compounds such as phenanthroline, bathophenanthroline, phenanthridine, acridine, quinoline, quinoxaline, phenazine and their derivatives, fluoro Cein, perylene, phthaloperylene, naphthaloperylene, perinone, phthaloperinone, naphthaloperinone, diphenylbutadiene, tetraphenylbutadiene, oxadiazole, aldazine, bisbenzoxazoline, bissty Le, pyrazine, cyclopentadiene, oxine, aminoquinoline, imine, diphenylethylene, vinyl anthracene, diaminocarbazole, pyran, may be mentioned thiopyran, polymethine, merocyanine, quinacridone, rubrene, and the like, and the like derivatives thereof.

  Further, as an organic compound having an electron transporting property, a metal chelate complex compound, particularly a metal chelated oxanoid compound, tris (8-quinolinolato) aluminum, bis (8-quinolinolato) magnesium, bis [benzo (f) -8-quinolinolato ] Zinc, bis (2-methyl-8-quinolinolato) (4-phenyl-phenolato) aluminum, tris (8-quinolinolato) indium, tris (5-methyl-8-quinolinolato) aluminum, 8-quinolinolatolithium, tris Mention may also be made of metal complexes having at least one 8-quinolinolato or a derivative thereof such as (5-chloro-8-quinolinolato) gallium and bis (5-chloro-8-quinolinolato) calcium as a ligand.

  As organic compounds having electron transport properties, oxadiazoles, triazines, stilbene derivatives, distyrylarylene derivatives, styryl derivatives, and diolefin derivatives can also be suitably used.

  Furthermore, as an organic compound that can be used as an organic compound having an electron transporting property, 2,5-bis (5,7-di-t-benzyl-2-benzoxazolyl) -1,3,4-thiazole, 4, 4′-bis (5,7-t-pentyl-2-benzoxazolyl) stilbene, 4,4′-bis [5,7-di- (2-methyl-2-butyl) -2-benzoxazoly Ru] stilbene, 2,5-bis (5.7-di-t-pentyl-2-benzoxazolyl) thiophene, 2,5-bis [5- (α, α-dimethylbenzyl) -2-benzoxa Zolyl] thiophene, 2,5-bis [5,7-di- (2-methyl-2-butyl) -2-benzoxazolyl] -3,4-diphenylthiophene, 2,5-bis (5- Methyl-2-benzoxazolyl) thiophene, 4,4′- Bis (2-benzoxazolyl) biphenyl, 5-methyl-2- {2- [4- (5-methyl-2-benzoxazolyl) phenyl] vinyl} benzoxazole, 2- [2- (4- Benzoxazoles such as chlorophenyl) vinyl] naphtho (1,2-d) oxazole, benzothiazoles such as 2,2 ′-(p-phenylenedipinylene) -bisbenzothiazole, 2- {2- [4- (2-Benzimidazolyl) phenyl] vinyl} benzimidazole, 2- [2- (4-carboxyphenyl) vinyl] benzimidazole, and the like are also included.

  Furthermore, as an organic compound having an electron transporting property, 1,4-bis (2-methylstyryl) benzene, 1,4-bis (3-methylstyryl) benzene, 1,4-bis (4-methylstyryl) benzene, Distyrylbenzene, 1,4-bis (2-ethylstyryl) benzene, 1,4-bis (3-ethylstyryl) benzene, 1,4-bis (2-methylstyryl) -2-methylbenzene, 1,4 -Bis (2-methylstyryl) -2-ethylbenzene and the like are also included.

  Further, as an organic compound having an electron transporting property, 2,5-bis (4-methylstyryl) pyrazine, 2,5-bis (4-ethylstyryl) pyrazine, 2,5-bis [2- (1- Naphthyl) vinyl] pyrazine, 2,5-bis (4-methoxystyryl) pyrazine, 2,5-bis [2- (4-biphenyl) vinyl] pyrazine, 2,5-bis [2- (1-pyrenyl) vinyl ] Pyrazine etc. are mentioned.

  In addition, as an organic compound having an electron transporting property, 1,4-phenylene dimethylidin, 4,4′-phenylene dimethylidin, 2,5-xylylene dimethylidin, 2,6-naphthylene dimethyl methacrylate Din, 1,4-biphenylene dimethylidin, 1,4-p-terephenylene dimethylidin, 9,10-anthracenediyl dimethylidin, 4,4 ′-(2,2-di-t-butylphenyl vinyl) ) Known materials conventionally used for the production of organic EL devices such as biphenyl and 4,4 ′-(2,2-diphenylvinyl) biphenyl can be appropriately used.

  On the other hand, as an organic compound having a hole transporting property, N, N, N ′, N′-tetraphenyl-4,4′-diaminophenyl, N, N′-diphenyl-N, N′-di (3-methyl Phenyl) -4,4′-diaminobiphenyl, 2,2-bis (4-di-p-tolylaminophenyl) propane, N, N, N ′, N′-tetra-p-tolyl-4,4′- Diaminobiphenyl, bis (4-di-p-tolylaminophenyl) phenylmethane, N, N′-diphenyl-N, N′-di (4-methoxyphenyl) -4,4′-diaminobiphenyl, N, N, N ′, N′-tetraphenyl-4,4′-diaminodiphenyl ether, 4,4′-bis (diphenylamino) quadriphenyl, 4-N, N-diphenylamino- (2-diphenylvinyl) benzene, 3- Me Xi-4'-N, N-diphenylaminostilbenzene, N-phenylcarbazole, 1,1-bis (4-di-p-triaminophenyl) -cyclohexane, 1,1-bis (4-di-p- Triaminophenyl) -4-phenylcyclohexane, bis (4-dimethylamino-2-methylphenyl) -phenylmethane, N, N, N-tri (p-tolyl) amine, 4- (di-p-tolylamino)- 4 ′-[4 (di-p-tolylamino) styryl] stilbene, N, N, N ′, N′-tetra-p-tolyl-4,4′-diamino-biphenyl, N, N, N ′, N ′ -Tetraphenyl-4,4'-diamino-biphenyl N-phenylcarbazole, 4,4'-bis [N- (1-naphthyl) -N-phenyl-amino] biphenyl, 4,4 "-bis [N- 1-naphthyl) -N-phenyl-amino] p-terphenyl, 4,4′-bis [N- (2-naphthyl) -N-phenyl-amino] biphenyl, 4,4′-bis [N- (3 -Acenaphthenyl) -N-phenyl-amino] biphenyl, 1,5-bis [N- (1-naphthyl) -N-phenyl-amino] naphthalene, 4,4′-bis [N- (9-anthryl) -N -Phenyl-amino] biphenyl, 4,4 ''-bis [N- (1-anthryl) -N-phenyl-amino] p-terphenyl, 4,4'-bis [N- (2-phenanthryl) -N -Phenyl-amino] biphenyl, 4,4'-bis [N- (8-fluoranthenyl) -N-phenyl-amino] biphenyl, 4,4'-bis [N- (2-pyrenyl) -N-phenyl -Amino] biphenyl, 4, 4′-bis [N- (2-perylenyl) -N-phenyl-amino] biphenyl, 4,4′-bis [N- (1-coronenyl) -N-phenyl-amino] biphenyl, 2,6-bis ( Di-p-tolylamino) naphthalene, 2,6-bis [di- (1-naphthyl) amino] naphthalene, 2,6-bis [N- (1-naphthyl) -N- (2-naphthyl) amino] naphthalene, 4.4 ″ -bis [N, N-di (2-naphthyl) amino] terphenyl, 4.4′-bis {N-phenyl-N- [4- (1-naphthyl) phenyl] amino} biphenyl, 4,4′-bis [N-phenyl-N- (2-pyrenyl) -amino] biphenyl, 2,6-bis [N, N-di (2-naphthyl) amino] fluorene, 4,4 ″ -bis (N, N-di-p-tolylamino) terphenyl Bis (N-1-naphthyl) (N-2-naphthyl) amine.

  Furthermore, as the hole injection layer, the hole transport layer, and the hole transport light-emitting layer, those obtained by dispersing the above-described organic compound in a polymer or those polymerized can be used. So-called π-conjugated polymers such as polyparaphenylene vinylene and derivatives thereof, hole-transporting non-conjugated polymers typified by poly (N-vinylcarbazole), and sigma-conjugated polymers of polysilanes can also be used.

  Although there is no limitation in particular as a positive hole injection layer, Conductive polymers, such as metal phthalocyanines, such as copper phthalocyanine (CuPc: Copper Phthalocyanine) and metal-free phthalocyanines, a carbon film, and polyaniline, can be used conveniently.

[Lighting panel with fan]
FIG. 6: shows the general | schematic partially notched perspective view of the illuminating device of the illumination panel with a fan of other embodiment by this invention. The lighting panel device 1 includes a fan 41 facing the organic EL panel 2 on the back wall side of the housing 5 that defines an internal space by a partition including the organic EL panel 2. Similar to the above-described embodiment, the organic EL panel 2 is provided with a plurality of through holes 4 formed on the surface thereof and penetrating from the internal space to the outside.

  By integrating the fan 41 and the organic EL panel 2 with the through hole 4, the function of the through hole 4 can be fully utilized.

[Lighting panel with through-hole integrated with control board]
FIG. 7: shows the general | schematic partially notched perspective view of the illuminating device of the illumination panel with a through-hole of other embodiment by this invention. In the illumination panel device 1, the control circuit board 43 of the organic EL panel 2 is provided on the surface opposite to the light emitting surface of the organic EL panel 2. An example of the control circuit board 43 is a control circuit board that drives the organic EL panel 2 in pulses for dimming the organic EL panel. As the housing (not shown) for defining the internal space, the housing 5 communicating with the conduit from the blower shown in FIG. 1 or the housing of the lighting panel with a fan shown in FIG. The air is blown through the through hole 4 of the organic EL panel 2.

  In this case, by providing through holes in the control circuit board 43 in accordance with the positions of the through holes 4 of the organic EL panel 2, it is possible to dissipate various electronic components of the control circuit of the organic EL panel 2. Become.

[Lighting panel with air cleaning mechanism]
FIG. 8: shows the top view of the illuminating device of the illumination panel with an air purifying mechanism of other embodiment by this invention. FIG. 9 is a sectional view taken along line AA in FIG.

  As shown in FIG. 9, the lighting device 1 a of the lighting panel with an air cleaning mechanism has a power receiving hook metal claw 51 (hook ceiling) provided at a substantially central portion on the back side of the housing 5, so that the ceiling of the house It is detachably fixed to a hooking rosette 63 attached to 62.

  In addition, an electrical connection portion CS for attaching and fixing the organic EL panel 2 is provided at a substantially central portion inside the housing 5, and a group of a plurality of through holes 52 serving as four suction ports is provided on the front surface of the organic EL panel 2. Similarly, four air outlets and a group of a plurality of through holes 53 are provided on the tapered side surface.

  On the other hand, the suction through holes 52 communicate with the blowing through holes 53 by the ducts 54 defined in the housing 5, and a dust collecting device 55 is provided in the middle of the duct 54. A blower 56 such as a multiblade fan is provided on the through hole 52 side. In the housing 5, a control unit (not shown) is provided that is supplied with power from the hooking metal claw 51 and controls on / off of the dust collector 55 and the blower 56.

  Further, a suction air filter 57 is provided along the organic EL panel 2 on the side of the air blower 56 of the duct 54 so as to be close to and opposed to the suction through hole 52, and close to and opposed to the blowout through hole 53. A blown air filter 58 is provided along the EL panel 2.

  By rotating the fan of the blower 56 disposed in the housing 5, the indoor air is sucked into the duct 54 from the suction through hole 52, and the oil component in the air is absorbed and removed by the suction air filter 57, and then collected. Smoke contained in the air is made smokeless or deodorized and purified by the dust device 55, and then passed through the blown air filter 58 to be further deodorized and then discharged again through the blowout through hole 53. With this configuration, the air in the vicinity of the ceiling can be efficiently purified by sucking indoor air from the front surface of the housing 5 and discharging it toward the side surface.

  In the present embodiment, for example, as shown in FIG. 9, a drive unit DS that is integrated with the organic EL panel 2 and performs on / off control and state control of the organic EL panel 2 is provided. The suction air filter 57 and the blowout air filter 58 are fixed by fixing the electric connection half CS2 (hook metal claw part) connected to the drive part DS of the organic EL panel 2 to the electric connection part CS and receiving power. Can be protected.

  In this embodiment, the housing 5 and the organic EL panel 2 are configured in a truncated pyramid shape with a square bottom in plan view. However, the planar shape is not limited to this, and the planar shape is a polygon such as a triangle or a quadrangle, A circular or elliptical truncated cone shape may be used. That is, the organic EL panel 2 has at least two planes having different normal directions, and the through holes 4 need only be provided on both planes. Further, as shown in the schematic partial plan view of the organic EL panel 2 of the lighting panel with blower holes according to another embodiment shown in FIG. 10, the distances v between adjacent ones of the plurality of through holes 4 are equal. By arranging the through holes, the luminance distribution of the organic EL panel 2 can be made uniform and the strength can be maintained. Further, the shape of the through hole is not limited to a circle, and can be formed and used in an ellipse, a rectangle, a polygon, or the like.

[Lighting device using inorganic EL panel as electroluminescence panel]
In the lighting device, the lighting device using the organic EL panel as the electroluminescence panel is exemplified. However, the organic EL panel 2 in the lighting device 1, 1a of the embodiment shown in FIG. 1, FIG. 6, FIG. 7 or FIG. Instead of the above, an inorganic EL panel can be used. An example of the inorganic EL panel 71 according to the present embodiment is shown in FIG. Examples of the inorganic EL panel 71 include those obtained by sequentially laminating a transmissive first electrode 72, a dielectric layer 73, and a light reflective second electrode 74 on the transparent substrate 20 such as glass. As the dielectric layer 73, an alternate laminated structure of light emitting layers and insulating layers can be adopted. Sulfides and oxides such as SrGa ₂ S ₄ : Eu (green), CaS: Eu (red), BaAl ₂ S ₄ : Eu (blue) are used for the light emitting layer, and strontium titanate is used for the insulating layer. An oxide such as (SrTiO ₃ ) is used. Thus, each inorganic EL element of an inorganic EL panel is an element provided with a plurality of inorganic material layers including a light emitting layer between a pair of opposed first and second electrodes carried on a substrate. The outer surface other than the blow-through hole 4 emits light and is used as illumination. The protective layer 24 is provided on the second electrode 74 side to form a laminated structure, and the inorganic EL panel 71 is configured.

  According to the present invention, even when used as illumination for a clean room, a compact illumination device can be provided, and since an electroluminescence panel that does not emit ultraviolet rays is used, a yellow filter is not necessary. A plurality of through holes are provided directly in the electroluminescence lighting panel, and the through holes are used for blowing. Thereby, since a yellow filter is not required, the structure of the lighting device is simplified. Since the illumination and the ventilation can be performed by the same device, the space utilization efficiency is increased. By blowing air to the through-hole, the temperature of the electroluminescence panel is lowered and the light emission life is extended. ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can be integrated with an air conditioner, an air cleaner other than clean room illumination can be obtained.

DESCRIPTION OF SYMBOLS 1 Lighting panel apparatus 2 Organic EL panel 4 Through-hole 5 Housing 6 Conduit 20 Board | substrate 21 Anode (1st electrode)
22 Cathode (second electrode)
51 Hook Metal Claw 52 Suction Through Hole 53 Blowout Through Hole 54 Duct 55 Dust Collector 56 Blower 57 Air Suction Air Filter 58 Blow Air Filter 62 Ceiling 63 Catch Rosette 71 Inorganic EL Panel CS2 Electrical Connection Half CS Electrical Connection

Claims (6)

A lighting device comprising a surface light emitter and a housing defining an internal space by a partition including the surface light emitter,
The surface light emitter is an electroluminescence panel that has a transparent substrate and emits visible light in a planar shape,
The electroluminescence panel has a plurality of through holes penetrating from the internal space to the outside,
An illumination device, wherein an inner wall surface of the through hole is protected by a moisture-proof barrier film.   The lighting device according to claim 1, wherein the electroluminescence panel is an organic electroluminescence panel.   The lighting device according to claim 1, wherein the electroluminescence panel is an inorganic electroluminescence panel.   The lighting device according to claim 1, further comprising an air filter provided in the internal space so as to face the through hole.   The electroluminescence panel has at least two planes having different normal directions, the through holes are provided in both of the two planes, and the through holes of one of the two planes communicate with the other through holes. The lighting device according to claim 4, further comprising a duct for caulking.   The lighting device according to any one of claims 1 to 5, wherein the through holes are arranged so that distances between adjacent ones of the through holes are equal.

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