JP2016062773A - Illumination system for road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination system for a road capable of being easily installed even in a hand rail in which a road structure or a road accessory, especially a sound blockage wall or the like, is installed, and capable of effectively suppressing glare to a driver.SOLUTION: An illumination system installed on a road structure or road accessory includes: an organic EL light-emitting element; at least one surface light-emitting unit having a thickness of 50 mm or less; a control unit controlling light emission of the surface light-emitting unit; and a power supply unit supplying power to the surface light-emitting unit. The surface light-emitting unit is installed in a region higher than the road surface of a road by 50 cm or more and 200 cm or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a road lighting system using a surface light emitting panel made of an organic EL light emitting element for road lighting.

  In general, lighting used on highways is a system in which a road is irradiated from a high position using a pole, and an illumination environment necessary for safety and comfort in night driving is realized. Particularly in recent years, LED lighting has been proposed that is highly efficient and can sufficiently secure road surface illumination as compared with conventional lighting such as fluorescent lamps. For example, Patent Document 1 discloses such LED illumination.

  However, depending on where the highway passes, there are many places where it is difficult to install poles, and there are many places where it is necessary to suppress light leakage to the outside of the road, such as effects on agricultural products and residential areas. There is a demand for an illumination system that can prevent light from leaking outside while securing safety and traveling performance at a predetermined location on such a road.

  Therefore, in order to prevent light leakage by installing a general lighting fixture in a low position, and to ensure nighttime safety and running performance, the height of road structures and road accessories, for example, about 1 m beside the highway. There has also been proposed a low-position-type highway lighting apparatus that is premised on installation in a handrail, which is a side wall having a wall. For example, Non-Patent Document 1 discloses such a highway lighting apparatus.

JP 2007-242258 A

Toshiba Review Vol. 60, no. 5 (2005), p. 54-57

  However, it has been difficult to sufficiently suppress glare on the driver in the low-position installation lighting fixture for highways as described above. In addition, although the low-position installation type highway lighting fixture as described above is supposed to have nothing installed on the railings, most of the highway railings are provided with sound insulation walls, It was difficult to easily and inexpensively attach a lighting fixture to a railing in which an existing sound insulation wall was installed.

  The present invention has been made in view of such problems, and the object of the present invention is that it is easy to install even in a railing where road structures and road accessories, particularly sound insulation walls, are installed, and driving. It is to provide a road lighting system capable of effectively suppressing glare for a person.

  In order to achieve the above-described object, a road lighting system according to the present invention is a road lighting system installed on a road structure or a road accessory, and includes an organic EL light-emitting element having a thickness of 50 mm or less. One surface light-emitting unit, a control unit that controls light emission of the surface light-emitting unit, and a power supply unit that supplies electric power to the surface light-emitting unit, the surface light-emitting unit is 50 cm from the road surface of the road It is installed in an area of 200 cm or less.

  In the road lighting system described above, it is preferable that the road structure is a rail with a sound insulation wall installed, and the surface light emitting unit is installed along a side surface of the sound insulation wall on the road side.

  In the above-described road lighting system in which the road structure is a railing, the surface light emitting unit is installed between an edge of the railing and a side surface of the sound insulation wall, and does not protrude from the railing toward the road. Is preferred. By doing in this way, the said surface light emission part does not obstruct the course of the vehicle which drive | works a road, and can improve the safety | security of driving | running | working of a vehicle.

  In any one of the above-described road lighting systems in which the road structure is a railing, the length of the surface light emitting portion in the road axis direction is 1.5 m or more, and the plurality of surface light emitting portions are arranged at intervals of 4 m or less. It may be provided. Thus, by adjusting the size and interval of the surface light emitting unit, the road surface of the road can be accurately irradiated, and the driver of the vehicle does not feel the irradiation light dazzling, and the driving safety of the vehicle can be improved. .

  In any one of the above-described road lighting systems in which the road structure is a balustrade, the control unit and the power supply unit may be installed between an edge of the balustrade and a side surface of the sound insulation wall, and the sound insulation wall May be installed in an area from which is partially removed. By installing the control unit and the power supply unit in this way, even a relatively large power supply unit that cannot be installed between the railing and the sound insulation wall is easily and inexpensively installed adjacent to the surface light emitting unit. can do.

  In any one of the above-described road lighting systems in which the road structure is a railing, the surface light emitting unit is configured such that the distance from the sound insulation wall increases from one end located on the railing side to the other end on the opposite side. The sound insulation wall may be inclined. Such a road lighting system may further include an angle adjustment mechanism that adjusts an inclination angle of the surface light emitting unit with respect to the sound insulation wall. By adjusting the surface light emitting part in this way, it is possible to suppress the light emitted from the surface light emitting part from being emitted above the road, and to illuminate the road surface efficiently and satisfactorily.

  In any one of the above-described road lighting systems in which the road structure is a railing, a louver that prevents the emitted light of the surface light emitting unit from being emitted toward the upper side of the road is provided in the surface light emitting unit. May be. By adjusting the surface light emitting part in this way, it is possible to suppress the light emitted from the surface light emitting part from being emitted above the road, and to illuminate the road surface efficiently and satisfactorily.

  In any one of the above-described road lighting systems in which the road structure is a railing, the control unit may selectively cause some of the plurality of surface light emitting units to emit light. By controlling the surface light emitting unit in this way, the surface light emitting unit can function as a guidance display.

  According to the road lighting system of the present invention, it can be easily installed even in a railing where road structures and road accessories, particularly sound insulation walls, are installed, and glare for the driver is effectively suppressed. be able to.

It is sectional drawing in the direction orthogonal to the road-axis direction of the highway in which the road illumination system which concerns on an Example was installed. It is a front view of the roadside which shows the state which looked at the roadside of the highway. It is a front view of the surface light emission part which concerns on an Example. It is a perspective view of the organic electroluminescent panel which comprises the surface emitting illumination apparatus which concerns on an Example. It is sectional drawing of the organic electroluminescent panel which comprises the surface emitting illumination apparatus which concerns on an Example. It is an electric circuit diagram of the illuminating device which comprises the illumination system for roads based on an Example. It is sectional drawing of the highway which concerns on the modification similarly shown, expanding sectional drawing in FIG. It is sectional drawing of the highway which concerns on the modification similarly shown, expanding sectional drawing in FIG.

  Hereinafter, with reference to drawings, the embodiment of the lighting system for roads by the present invention is described in detail based on an example or a modification. In addition, this invention is not limited to the content demonstrated below, In the range which does not change the summary, it can change arbitrarily and can implement. In addition, the drawings used for explaining the embodiment or the modification schematically show the road lighting system or the components thereof according to the present invention, and are partially emphasized, enlarged, reduced, Or the omission etc. are performed, and it may not represent correctly the reduced scale, the shape, etc. of each structural member. Furthermore, all the various numerical values used in the embodiment or the modification are examples, and can be variously changed as necessary.

  Further, in the following examples or modifications, it is assumed that the road is installed on a rail with a railing and a sound insulation wall provided on the railing, but the installation location is not limited to the railing, and road structures and road accessories It is possible to apply to general things.

  In addition, as a specific example of the road structure in this invention, a bridge, a tunnel, a handrail, etc. are mentioned. Specific examples of road accessories include sound insulation walls, lighting poles, sign plates, and the like.

<Example>
(Structure of road lighting system)
First, the overall configuration of a road lighting system according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view in the direction orthogonal to the road axis direction of the entire highway in which the road lighting system according to the present embodiment is installed. FIG. 2 is a front view of the roadside showing a state where the side of the highway is visually observed.

  As can be seen from FIG. 1 and FIG. 2, in the road lighting system 1 according to this embodiment, a plurality of lighting devices are provided on the upper surface 4 a of the rail 4 provided on the side of the highway 3 surrounded by the sound insulation wall 2. 5 is installed. Here, the illumination device 5 includes a surface light emitting unit 6 that irradiates light, and a support unit 7 that supports the surface light emitting unit 6 and supplies power to the surface light emitting unit 6 and controls it.

  As a more specific installation configuration, the lighting device 5 is installed on the upper surface 4 a of the rail 4 and along the side surface 2 a on the highway 3 side of the sound insulating wall 2 provided on the upper surface 4 a of the rail 4. Yes. In particular, a plurality of support portions 7 are arranged on the upper surface 4 a of the rail 4, and the surface light emitting portions 6 supported by the support portions 7 are juxtaposed along the side surface 2 a of the sound insulating wall 2. In addition, the surface light emitting unit 6 extends in a direction orthogonal to the road surface 3 a of the highway 3 so as to be parallel to the sound insulating wall 2. And each of the illuminating device 5 which consists of the surface light emission part 6 and the support part 7 is installed inside the sound insulation wall 2, and light is radiate | emitted from the surface light emission part 6 so that the road surface 3a of the highway 3 may be irradiated. It will be.

  Generally, the height of the column 4 is 50 cm to 90 cm. For this reason, if the illuminating device 5 is installed on the upper surface 4a of the rail 4, the surface light-emitting part 6 will be installed in the area | region 50 cm or more from the road surface 3a. In the present embodiment, the surface light emitting unit 6 is installed in an area of 50 cm to 200 cm from the road surface 3a. When the surface light emitting unit 6 is installed in such an area, the maintenance work of the lighting device 5 can be easily performed. In addition, the light emitted from the surface light emitting unit 6 is efficiently and satisfactorily applied to the road surface 3a, so that a sufficient amount of illumination can be provided to the driver of the vehicle traveling along the highway 3. Thereby, the safety | security of driving | running | working of a vehicle improves.

  In general, the width of the upper surface 4a of the rail 4 is about 25 cm, and the width of the sound insulation wall 2 is about 15 cm. For this reason, when the sound insulation wall 2 is installed at the center of the upper surface 4a of the rail 4, the distance from the side surface 2a of the sound insulation wall 2 to the edge of the upper surface 4a of the rail 4 is about 5 cm (50 mm). The lighting device 5 of the road lighting system 1 according to the present embodiment is located between the edge of the upper surface 4a of the rail 4 and the side surface 2a of the sound insulation wall 2, and does not protrude from the rail 4 toward the highway 3. Therefore, the thickness of each lighting device 5 is 5 cm or less (for example, 3 cm). In other words, each of the surface light emitting portion 6 and the support portion 7 which are constituent members of the lighting device 5 has a thickness of 5 cm or less. Thus, when each lighting device 5 is installed so as not to protrude from the rail 4 to the highway 3, the course of the vehicle traveling on the highway 3 is not obstructed, and traveling in the highway 3 is prevented. Safety will be maintained.

  Moreover, as shown in FIG. 2, the illuminating device 5 is juxtaposed along the roadside at a fixed interval. Here, the space | interval in this invention refers to the distance of the center parts of the road axis direction of the illuminating device 5. FIG. In the present embodiment, the width of the lighting device 5 (the length in the road axis direction) is about 2 m, and the distance between adjacent ends of the lighting devices 5 juxtaposed adjacent to each other is about 2 m. That is, in the present embodiment, the lighting devices 5 are installed at intervals of 4 m. In this way, by setting the distance between the illumination devices 5 to 4 m or less, the road surface 3a of the highway 3 can be accurately irradiated, and a sufficient amount of illumination can be provided to the driver of the vehicle. Can increase the sex.

  In addition, the space | interval of the illuminating device 5 can be suitably changed according to the width | variety, height, and brightness | luminance of the illuminating device 5, the installation environment of the highway 3, etc.

  Next, the surface light emitter 6 will be described with reference to FIG. FIG. 3 is a front view of the surface light emitting unit 6. The dimensions of the surface light emitting part 6 are about 2 m in width (length in the road axis direction) and about 30 cm in height. Further, as can be seen from FIGS. 2 and 3, the interval between the adjacent surface light emitting portions 6 is about 4 m. Further, as shown in FIG. 3, the surface light emitting unit 6 includes 36 organic EL panels 8 arranged in a matrix of 2 rows and 18 columns, and a housing 9 that houses the 36 organic EL panels 8. Has been. Here, the outer shape of the surface light emitting portion 6 is a thin rectangular parallelepiped shape (that is, a flat plate shape), and the planar shape on the light emitting surface side of the surface light emitting portion 6 is a rectangular shape. In the present embodiment, the 36 organic EL panels 8 constitute one organic EL light emitting module 10 for every six arranged in 2 rows and 3 columns, and control and detach light emission in units of the modules. be able to. That is, the surface light emitting unit 6 is composed of six organic EL light emitting modules 10. In addition, the dimension of the surface emitting part 6 is not limited to the dimension mentioned above, For example, it can adjust within the range whose width is 1.5 m or more and height is 30 cm-70 cm (preferably 50 cm).

  The shape of one organic EL panel 8 is, for example, a square having a side of about 10 cm. For this reason, the dimension of the area | region which radiate | emits the light of the surface light emission part 6 will be about 20 cm x 180 cm. A specific structure of the organic EL panel 8 will be described later.

  The housing 9 has a rectangular parallelepiped outer shape, and an opening 9a for exposing the light emitting surface of the housed organic EL panel 8 is formed. The housing 9 is preferably formed from a relatively strong material, and is made of, for example, plastic, resin, metal, glass, or the like. The organic EL panel 8 may be firmly fixed to the housing 9 by an adhesive, screwing, or the like, and is supported by being in contact with the edge portion of the housing 9 by being inserted into the opening 9a. May be.

  Note that the arrangement configuration of the organic EL panels 8 constituting the surface light emitting unit 6 is not limited to the above-described one. For example, the number of rows and the number of columns may be changed, and the shape of the light emitting surface composed of the plurality of organic EL panels 8 may be a square, a circle, an ellipse, another polygon, or the like. Here, when the shape of the light emitting surface formed of the plurality of organic EL panels 8 is other than a rectangular shape, the housing 9 and the opening 9a thereof are deformed corresponding to the combination of the organic EL panels 8.

  Further, the surface light emitting unit 6 may have a structure capable of performing light emission control and replacement in units of one sheet without configuring the organic EL light emitting module 10 as described above.

  Next, the structure of the organic EL panel 8 that is a constituent member of the surface light emitting unit 6 will be described with reference to FIGS. 4 and 5. Here, FIG. 4 is a perspective view of the organic EL panel 8. FIG. 5 is a cross-sectional view of the organic EL panel 8.

  As shown in FIG. 4, the organic EL panel 8 includes a transparent substrate 11, an organic EL light emitting element 12, a light diffusion part 13, and a sealing part 14. The organic EL light emitting element 12 is classified into three types: an organic EL light emitting element 12R whose emission color is red, an organic EL light emitting element 12G whose emission color is green, and an organic EL light emitting element 12B whose emission color is blue. The

  In the present embodiment, the transparent substrate 11 is a glass substrate. The transparent substrate 11 may be a substrate having a property of transmitting visible light, and is made of, for example, a transparent resin such as polyester, polymethacrylate, polycarbonate, polyimide, polyethylene terephthalate, polyethylene naphthalate, or polysulfone, or ceramics. May be.

  As a more specific configuration of the organic EL panel 8, a plurality of organic EL light emitting elements 12R, organic EL light emitting elements 12G, and organic EL light emitting elements 12B are provided on the organic EL light emitting element forming surface 11a of the transparent substrate 11. Adjacent elements are arranged in a striped manner so as to be separated from each other. These organic EL light emitting elements are repeatedly arranged in the order of the organic EL light emitting elements 12R, 12G, and 12B. With such a configuration, the red light emitted from the organic EL light emitting element 12R, the green light emitted from the organic EL light emitting element 12G, and the blue light emitted from the organic EL light emitting element 12B are synthesized, and organic The combined light of uniform color is emitted from the EL panel 8 as a whole. The number of each of the organic EL light emitting elements 12R, 12G, and 12B that emit light of each color may be one, but the light emitting surface is enlarged, the organic EL panel 8 has high brightness, and good light. When mixing these, it is preferable to arrange many organic EL light emitting elements 12R, 12G, and 12B in parallel. Moreover, each organic EL light emitting element may be spaced apart by providing the partition (not shown) which consists of insulating resin etc. between each organic EL light emitting element.

  As shown in FIG. 5, the organic EL light emitting element 12R whose emission color is red includes an anode (transparent electrode) 15R formed on the transparent substrate 11, an organic layer 16R formed on the anode 15R, and an organic layer 16R. It is comprised from the cathode (metal electrode) 17R formed on the top. Similarly, the organic EL light emitting element 12G whose emission color is green was formed on the anode (transparent electrode) 15G formed on the transparent substrate 11, the organic layer 16G formed on the anode 15G, and the organic layer 16G. An organic EL light emitting device 12B composed of a cathode (metal electrode) 17G and emitting blue is an anode (transparent electrode) 15B formed on the transparent substrate 11, an organic layer 16B formed on the anode 15B, organic It consists of a cathode (metal electrode) 17B formed on the layer 16B. When any of the anodes 15R, 15G, and 15B is not designated, it is simply referred to as the anode 15, and when any of the organic layers 16R, 16G, and 16B is not designated, it is simply referred to as the organic layer 16, and the cathodes 17R and 17G. , 17B may be simply referred to as the cathode 17 when not designated. That is, in this embodiment, the anode 15, the organic layer 16, and the cathode 17 constituting each organic EL light emitting element 12 are sequentially laminated on the transparent substrate 11.

  Further, the planar shapes (that is, areas) of the anode 15, the organic layer 16, and the cathode 17 are substantially the same. Therefore, the side surfaces of the anode 15, the organic layer 16, and the cathode 17 are the same plane, and the shape of the organic EL light emitting element 12 is a rectangular parallelepiped.

  In this embodiment, the anode 15 is made of indium tin oxide (ITO). For this reason, the anode 15 has a function of injecting holes into the organic layer 16 and has translucency for light emission from the organic layer 16. That is, the anode 15 functions as a transparent electrode. The anode 15 is formed by a sputtering method, a vacuum deposition method, or the like. On the surface of the anode 15, it is preferable to form the organic layer 16 after ultraviolet irradiation or ozone treatment from the viewpoint of removing impurities on the anode 15 and improving hole injection properties by adjusting ionization potential.

  The anode 15 is not limited to being composed of indium tin oxide, and has a function of injecting holes into the organic layer 16 and is transmissive to light emitted from the organic layer 16. For example, metal oxides such as indium zinc oxide, metals such as aluminum, gold, silver, nickel, palladium and platinum, metal halides such as copper iodide, carbon black, poly (3-methyl (Thiophene), a conductive polymer such as polypyrrole, or the like. Moreover, the anode 15 may be comprised from a different material for every organic EL light emitting element 12R, 12G, 12B.

  Although not illustrated in FIG. 5, the organic EL light emitting device may further include a hole injection layer, a hole transport layer, an electron transport layer, and / or an electron injection layer. In that case, it is preferable to have a structure in which a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer are laminated in this order from the anode 15 side. In the case of such a laminated structure, the organic layer 16 may be composed of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer, or may be composed of a part of these layers. May be. That is, the layers constituting the organic layer 16 differ depending on whether or not an organic material is used for the material of each layer.

  The hole injection layer and the hole transport layer are preferably formed of a hole transporting material, and include aromatic amine derivatives, phthalocyanine derivatives, porphyrin derivatives, oligothiophene derivatives, polythiophene derivatives, benzylphenyl derivatives, fluorene groups. A compound in which a tertiary amine is linked, a hydrazone derivative, a silazane derivative, a silanamine derivative, a phosphamine derivative, a quinacridone derivative, a polyaniline derivative, a polypyrrole derivative, a polyphenylene vinylene derivative, a polythienylene vinylene derivative, a polyquinoline derivative, a polyquinoxaline derivative, carbon, etc. Can be mentioned. The electron transport layer is preferably formed of an electron transport material, for example, a metal complex such as an aluminum complex of 8-hydroxyquinoline, a metal complex of 10-hydroxybenzo [h] quinoline, an oxadiazole derivative. , Distyryl biphenyl derivatives, silole derivatives, 3-hydroxyflavone metal complexes, 5-hydroxyflavone metal complexes, benzoxazole metal complexes, benzothiazole metal complexes, trisbenzimidazolylbenzene, quinoxaline compounds, phenanthroline derivatives, 2-t-butyl- 9,10-N, N′-dicyanoanthraquinone diimine, n-type hydrogenated amorphous silicon carbide, n-type zinc sulfide, n-type zinc selenide and the like can be mentioned. The electron injection layer is preferably made of a metal having a low work function. Examples include alkali metals such as sodium and cesium, and alkaline earth metals such as barium and calcium.

The following are mentioned as a luminescent material used for the said light emitting layer. Examples of the light-emitting material that gives red light emission include DCM (4- (dicyanomethylene) -2-methyl-6- (p-dimethylaminostyryl) -4H-pyran) compounds, benzopyran derivatives, rhodamine derivatives, benzothioxanthene derivatives, aza Examples include benzothioxanthene. Examples of the light emitting material that gives green light emission include quinacridone derivatives, coumarin derivatives, and aluminum complexes such as Al (C ₉ H ₆ NO) ₃ . Furthermore, examples of the light emitting material that gives blue light emission include naphthalene, perylene, pyrene, anthracene, coumarin, p-bis (2-phenylethenyl) benzene, and derivatives thereof. In addition, any one kind may be used for the luminescent material mentioned above, and two or more types may be used together by arbitrary combinations and ratios.

  In the present embodiment, the cathode 17 does not need to have translucency, and thus is made of aluminum. That is, the cathode 17 is a metal electrode. The cathode 17 is formed by a sputtering method, a vacuum evaporation method, or the like. In addition, the cathode 17 is not limited to aluminum, For example, metals, such as tin, magnesium, indium, calcium, silver, those alloys, etc. are used. Specific examples include low work function alloy electrodes such as magnesium-silver alloys, magnesium-indium alloys, and aluminum-lithium alloys. Moreover, the cathode 17 may be comprised from a different material for every organic EL light emitting element 12R, 12B, 12G.

  As shown in FIGS. 4 and 5, the light diffusion portion 13 is formed so as to cover the entire surface of the organic EL light emitting element non-forming surface 11 b of the transparent substrate 11. The light diffusing unit 13 has an effect of diffusing the light of each color emitted from the organic EL light emitting element 12 to uniformly mix the colors. Due to such an effect, the member composed of the transparent substrate 11 that is a glass substrate and the light diffusion part 13 functions as a single light source as a whole. In this embodiment, the light diffusing portion 13 is composed of a film in which fine particles are dispersed in a transparent resin. In addition, the light-diffusion part 13 is not limited to this film, For example, it can form by roughening the substrate surface.

  As described above, the transparent substrate 11 has a characteristic of transmitting the light of each color emitted from each organic EL light emitting element 12. For this reason, as shown in FIG. 5, the light emitted from each organic EL light emitting element 12 passes through the transparent substrate 11 and the light diffusing unit 13 and is emitted from the organic EL panel 8 to the outside.

  As shown in FIGS. 4 and 5, the sealing portion 14 has a function of covering each organic EL light emitting element 12 and preventing the light emitting material of each organic EL light emitting element 12 from being oxidized and deteriorated by the atmosphere. Moreover, the sealing part 14 is formed so that the space | gap 18 is filled and the organic electroluminescent light emitting element formation surface 11a of the transparent substrate 11 is not exposed. In the present embodiment, the sealing portion 14 is an epoxy resin having translucency. In addition, the sealing part 14 may be other transparent resin provided with translucency, such as a silicone resin other than an epoxy resin.

  Moreover, the sealing part 14 is not limited to being comprised from resin as mentioned above. For example, the sealing part 14 may be a translucent member such as plastic that covers the plurality of organic EL light emitting elements 12 as a whole. In such a case, the gap 18 is not filled with the sealing portion 14.

The luminance of the organic EL panel 8 can be appropriately changed according to the road width of the highway 3 and the surrounding environment. For example, in the case of the present embodiment, when the organic EL panel 8 having a moderate orientation of about 2000 cd / m ² is used, the average illuminance on the entire 3.5 m wide roadway not including the 2 m road shoulder However, it is possible to realize an illumination environment of about 15 lux.

  In this embodiment, the bottom emission type organic EL panel 8 is used. However, a top emission type organic EL surface light emitting panel may be used. In this case, various opaque support substrates can be used in place of the transparent substrate 11 that supports the plurality of organic EL light emitting elements 12. The layer structure may be formed from the anode to the cathode in the opposite direction to the bottom emission type. Moreover, in the Example mentioned above, although the organic layer 16 from which luminescent color differs for every organic EL light emitting element 12 was used, the organic layer 16 of all the organic EL light emitting elements 12 is a luminescent material for red light, The light-emitting material for green light and the light-emitting material for blue light may be composed of a polymer-dispersed EL material in which the light-emitting material is uniformly dispersed. Furthermore, a stacked organic EL light emitting device in which a layer made of a light emitting material for red light, a layer made of a light emitting material for green light, and a layer made of a light emitting material for blue light may be used. Alternatively, a stacked organic EL light emitting element in which a layer in which two color light emitting materials are mixed and a layer in which the remaining one color light emitting material is stacked may be used. In these stacked organic EL light emitting elements, the gap 18 may be omitted.

  In the present embodiment, the shape of the light emitting surface of the organic EL panel 8 is a rectangle, but the shape is not limited, and may be a square, a circle, an ellipse, a triangle, or other shapes. .

  Next, the electrical circuit configuration of the illumination device 5 and the structure of the support portion 7 will be described with reference to FIG. Here, FIG. 6 is an electric circuit diagram of the illumination device 5 constituting the road illumination system 1 according to the present embodiment.

  As shown in FIG. 6, a power supply unit 21 that supplies power to the organic EL panel 8 and a control unit 22 that controls the light emission of the organic EL panel 8 by controlling the power supply unit 21 are provided inside the support unit 7. ing. In the present embodiment, the support portion 7 includes a strong housing (not shown) made of metal, glass, plastic, or the like, and is connected to an external power source (not shown) in the internal space of the housing. A power supply unit 21 that is an internal power supply and a control unit 22 including a central processing unit (CPU) and the like are incorporated. Therefore, in this embodiment, the power supply unit 21 and the control unit 22 are installed between the edge of the upper surface 4 a of the rail 4 and the side surface 2 a of the sound insulating wall 2. In other words, the power supply unit 21 and the control unit 22 are designed to have a thickness of 5 cm or less.

  As shown in FIG. 6, the control unit 22 is provided adjacent to the power supply unit 21 and supplies a control signal generated therein to the power supply unit 21. The power supply unit 21 generates desired power based on the received control signal and supplies it to the surface light emitting unit 6. Here, the power source unit 21 is independently connected to each of the six organic EL modules 10 constituting the surface light emitting unit 6, and can supply power to each of the six organic EL modules 10. . Thereby, in one surface light emission part 6, a light emission area | region and a non-light-emission area | region can be formed, and the light quantity radiate | emitted from one surface light emission part 6 according to road surface conditions, such as the brightness of the road surface 3a of the highway 3. Can be adjusted, and the road surface 3a can be illuminated well.

  In the present embodiment, an independent power supply unit 21 and control unit 22 are provided in each of the lighting devices 5 installed on the upper surface 4a of the rail 4. For this reason, it is possible to selectively emit part of the plurality of lighting devices 5. More specifically, the road lighting system 1 may function as a guidance display by sequentially lighting the plurality of lighting devices 5. Thus, by functioning as a guidance display while functioning as illumination, it is not necessary to separately provide a guidance sign, and the cost of the facilities on the highway 3 can be reduced.

  The lighting device 5 is not provided with the independent power supply unit 21 and the control unit 22, and the plurality of lighting devices 5 are collectively controlled and supplied with power by the single power supply unit 21 and the control unit 22. Good. In such a case, the surface light emitting unit 6 is directly installed on the upper surface 4 a of the rail 4, and when the support unit 7 including the power source unit 21 and the control unit 22 is provided on the rail 4, the surface light emitting unit 6 is supported. It is necessary to install so that the part 7 does not protrude toward the highway 3 from the edge of the upper surface 4a of the rail 4.

  Further, in the above-described embodiment, the surface light emitting unit 6 is installed in parallel to the sound insulating wall 2 in the direction orthogonal to the road surface 3 a, but the surface light emitting unit 6 is inclined with respect to the sound insulating wall 2. You may let them. That is, the surface light emitting unit 6 may be inclined with respect to the sound insulating wall 2 so that the distance from the sound insulating wall 2 increases from one end located on the rail 4 side toward the other end on the opposite side. In this way, by inclining the surface light emitting unit 6, light emitted from the surface light emitting unit 6 is suppressed from being emitted above the highway 3, and the road surface can be illuminated efficiently and satisfactorily.

  Further, in the above-described embodiment, the case where the road lighting system 1 is provided on the highway 3 has been described. However, the road lighting system 1 may be provided on another road where the railing 4 and the sound insulation wall 2 are provided. Good.

(Effect of this embodiment)
The road lighting system 1 according to the present embodiment is premised on being used in a highway 3 in which a sound barrier 2 provided on the rail 4 and the rail 4 is installed, and includes an organic EL light emitting element 12. It has at least one surface light emitting unit 6 having a thickness of 50 mm or less, a control unit 22 that controls light emission of the surface light emitting unit 6, and a power source unit 21 that supplies power to the surface light emitting unit 6. The surface light emitting unit 6 is an area from 50 cm to 200 cm from the road surface 3 a of the highway 3, and is installed along the road-side side surface 2 a of the sound insulating wall 2.

  In the present embodiment, the road lighting system 1 is provided with a surface light emitting unit 6 composed of a plurality of organic EL panels 8 in an area of 50 cm or more and 200 cm or less from the road surface 3a of the highway 3, and the side surface of the sound insulation wall 2 on the road side. Since it installs along 2a, the illumination intensity on the road surface 3a is fully securable by illuminating the road surface 3a favorably. In addition, by using the organic EL panel 8, the light emitted from the surface light emitting unit 6 has good glare for the driver of the vehicle. Further, since the thickness of the support unit 7 including the power source unit 21 and the control unit 22 and the surface light emitting unit 6 is 50 mm or less, the lighting device 5 and the road lighting system can be easily provided on the rail 4 where the sound insulating wall 2 is installed. 1 can be installed.

  That is, the road lighting system 1 according to the present embodiment can be easily installed even in the rail 4 where the sound insulating walls 2 and the like are installed, and glare for the driver can be effectively suppressed.

  Further, in the road lighting system 1 according to the present embodiment, the surface light emitting unit 6 is installed between the edge of the rail 4 and the side surface of the sound insulation wall 2, and does not protrude from the rail 4 toward the highway 3. For this reason, the surface light emission part 6 does not obstruct the course of the vehicle which drive | works a road, and even when the road illumination system 1 is installed, the driving | running | working safety | security of a vehicle can be improved.

  Furthermore, in the road lighting system 1 according to the present embodiment, the length of the surface light emitting unit 6 in the road axis direction is 1.5 m or more, and the plurality of surface light emitting units 6 are arranged in parallel at intervals of 4 m or less. Yes. By adjusting the size and interval of the surface light emitting part 6 in this way, the road surface 3a of the highway 3 is accurately illuminated, so that the driver of the vehicle does not feel the illumination light dazzling, and the driving safety of the vehicle is improved. be able to.

<Modification>
The above-described embodiments are merely one form of the road lighting system according to the present invention, and the structure and arrangement of components of the road lighting system can be changed as appropriate. Hereinafter, a road lighting system according to a modification will be described with reference to FIGS. 7 to 9. Here, FIG. 7 to FIG. 9 are cross-sectional views of a highway according to a modification shown in the same manner while enlarging the cross-sectional view in FIG. In addition, about the structure same as the Example mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  First, in the modified example shown in FIG. 7, the lighting device 105 constituting the road lighting system 101 includes a surface light emitting unit 106 and a support unit 107. Here, the surface light emitting unit 106 is disposed on the upper surface 4 a of the rail 4, and the support unit 107 is located inside the sound insulating wall 2. More specifically, the sound insulation wall 2 installed on the rail 4 is partially removed to form an opening, and the support portion 7 is fitted into the opening, which is a partially removed region.

  The configurations of the surface light emitting unit 106 and the support unit 107 are the same as those in the above-described embodiment. The surface light emitting unit 106 includes 36 organic EL panels 8 and a housing 9, and the support unit 107 includes the power source unit 21 and A control unit 22 is included. Due to such a configuration of the support portion 107, in the present modification, the power source portion 21 and the control portion 22 are installed in an area where the sound insulating wall 2 is partially removed.

  In such a modification, the lighting device 105 is mounted on the upper surface of the rail 4 even when it is difficult to reduce the size of the power supply unit 21 and the control unit 22 or when the existing power supply unit 21 having a thickness of 50 mm or more is used. It can install without making it protrude toward the highway 3 from the edge of 4a. For this reason, also in the road lighting system 101 as in the present modification, the road surface 3a can be illuminated well without affecting the traveling of the vehicle.

  As another modified example, it is also preferable that the organic EL panel 8 constituting the surface light emitting unit 6 is arranged inside the housing 9 with the light emitting surface inclined slightly downward. By doing so, it is possible to further increase the illuminance on the road surface 3a without greatly increasing the thickness of the surface light emitting portion 6, and to reduce the amount of light emitted from the highway 3 to the outside. It is possible to suppress light leakage to the periphery of the highway 3.

  Next, in the modification shown in FIG. 8, the lighting device 305 constituting the road lighting system 301 includes a surface light emitting unit 6, a support unit 7, and a louver 232 provided at one end of the surface light emitting unit 6. ing. The louver 232 reflects the light emitted from the surface light emitting unit 6 toward the upper side of the highway 3 toward the road surface 3a. Here, the size of the louver 232 needs to be adjusted so that it does not protrude toward the highway 3 from the edge of the upper surface 4a of the rail 4. It is preferable to use a scattering plate that diffusely reflects light from the surface light emitting unit 6 in a wide wavelength band on the lower surface side of the louver 232. This is because the illuminance of the road surface 3a can be further increased.

  As described above, since the lighting device 305 includes the louver 232, the amount of light emitted from the surface light emitting unit 6 can be reduced to the outside of the highway 3, and the road surface 3a of the highway 3 can be irradiated well. In addition, light leakage to the periphery of the highway 3 can be suppressed.

  In order to protect the surface light emitting unit 6, it is also preferable to provide a transparent protective sheet made of a resin such as polycarbonate on the entire surface of the surface light emitting unit 6 on the light emitting side.

DESCRIPTION OF SYMBOLS 1 Road lighting system 2 Sound insulation wall 2a Side surface 3 Expressway 3a Road surface 4 Rail 4a Upper surface 5 Illumination device 6 Surface light emission part 7 Support part 8 Organic EL panel 9 Case 9a Opening 10 Organic EL module 11 Transparent substrate 12 Organic EL light emitting element 13 Light diffusion part 14 Sealing part 15, 15R, 15G, 15B Anode 16, 16R, 16G, 16B Organic layer 17, 17R, 17G, 17B Cathode 18 Air gap 21 Power supply part 22 Control part

Claims (10)

A lighting system for roads installed on road structures or road accessories,
An organic EL light emitting device, and a thickness of at least one surface light emitting portion having a thickness of 50 mm or less;
A control unit for controlling light emission of the surface light emitting unit;
A power supply unit for supplying power to the surface light emitting unit,
The said surface light emission part is a lighting system for roads installed in the area | region 50 cm or more and 200 cm or less from the road surface of a road. The road structure is a railing where a sound insulation wall is installed,
The road illumination system according to claim 1, wherein the surface light emitting unit is installed along a road side surface of the sound insulation wall.   The road lighting system according to claim 2, wherein the surface light emitting unit is installed between an edge of the railing and a side surface of the sound insulation wall, and does not protrude toward the road from the railing. The length of the surface light emitting portion in the road axis direction is 1.5 m or more,
The road illumination system according to claim 2 or 3, wherein the plurality of surface light emitting units are arranged in parallel at intervals of 4 m or less.   5. The road illumination system according to claim 2, wherein the control unit and the power supply unit are installed between an edge of the railing and a side surface of the sound insulation wall.   The road control system according to any one of claims 2 to 4, wherein the control unit and the power supply unit are installed in an area where the sound insulation wall is partially removed.   The said surface emitting part inclines with respect to the said sound insulation wall so that the distance with the said sound insulation wall may become long toward the other end on the opposite side from the one end located in the said railing side. The road lighting system according to item 1.   The road illumination system according to claim 7, further comprising an angle adjustment mechanism that adjusts an inclination angle of the surface light emitting unit with respect to the sound insulating wall.   The road illumination system according to any one of claims 2 to 8, wherein a louver that prevents the emitted light of the surface light emitting unit from being emitted upward of the road is provided in the surface light emitting unit. .   The road control system according to any one of claims 2 to 9, wherein the control unit selectively causes some of the plurality of surface light emitting units to emit light.

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