JP2011028890A - Outdoor lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor lighting system which exhibits excellent weatherability, and irradiates a large area with uniform light. <P>SOLUTION: The outdoor lighting system includes a power control substrate 15 arranged on a base circular plate 12, a light emitting part 11 formed of an organic EL panel 20 held on the base circular plate 12 so as to surround the power control substrate 15, a resin cover 13 for covering a periphery of the light emitting part 11, and a top cover 16 for covering an upper surface of the resin cover 13. When it is dark, the organic EL panel 20 of the light emitting part surface-emits light by power supplied from the power control substrate 15, and the uniform light is emitted to a side surface circumference through the resin cover 13. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an outdoor lighting device, and more particularly to an outdoor lighting device that is installed in a corner of a garden such as a garden lamp and can illuminate the inside of the garden with a soft and uniform light beam.

  Conventionally, in an outdoor lighting device such as a garden lamp, a plurality of high-intensity LEDs are arranged on a substrate provided at a central position in a cylindrical light source unit, and LED emission is diffused by a plastic light guide lens. There is a device to illuminate the surroundings of garden lights. In these apparatuses, there are many structures in which the substrate on which the LEDs are arranged faces downward in order to make the components housed in the illumination compact. In this case, it is necessary to diffuse the optical axis of the LED light emitted downward so that the horizontal component increases, and to guide the light toward the outside of the cylindrical illumination device. For this reason, there exists a malfunction that a light quantity falls. In order to solve this problem, there is also a garden lamp having a structure in which the light emitting direction of the LED is arranged in four directions on the peripheral side of the cylindrical fixture. In this case, it is necessary to accommodate a plurality of LED mounting boards in the light source unit. In addition, it is necessary to electrically connect the substrates, and the wiring in the light source unit becomes complicated. In addition, since the LED faces a limited direction, the amount of light varies depending on the direction, and the garden or the like cannot be illuminated with uniform light.

  Moreover, a compact fluorescent lamp may be used as a light source. In the case of fluorescent lamp fixtures, there is a problem that sufficient illumination cannot be obtained at the start of lighting in an environment where the outside air temperature is low such as in winter.

  In recent years, lighting devices and light source devices using organic EL (electroluminescence) as a surface light source have been developed (Patent Documents 1 to 3).

  The illumination disclosed in Patent Document 1 is used for an electric signboard that processes an organic EL into a columnar shape, parallels a plurality of pieces, and emits light as a whole. Patent Document 2 discloses a light emitting body in which an organic EL is rolled into a multi-layered annular shape so that a wide color reproduction range can be set. Patent Document 3 discloses a long cylindrical light source device capable of improving the uniformity of light emission luminance.

  In the inventions disclosed in each of these patent documents, attention is paid to the functionality as a light emitting material that emits uniform light in a planar shape, and the workability that can be appropriately cut and bent as a sheet-like material. The light source device having a cylindrical light source is used as an illumination device.

JP 2009-72274 A JP 2009-59100 A JP 2009-76269 A

  By the way, in the electric signboard disclosed in Patent Document 1, since a plurality of organic ELs rounded into a columnar shape are used, a reflector is positioned behind the organic ELs arranged in a line, and direct light from the light source is obtained. In addition, the illuminance of the entire display panel of the electric signboard is made uniform by using diffused light from the reflector. Therefore, the columnar organic EL alone does not function as a uniform light source. The light emitter disclosed in Patent Document 2 has a structure in which a light emitter is wound in multiple layers around a support rod. In Patent Document 3, a light source device that is rounded into a cylindrical shape is used by providing power supply portions at both ends of a light emitting body that has a thin cylindrical shape.

  On the other hand, in a garden lamp or the like, even when the organic EL is rolled up to be a light source, it is necessary to provide a light source that is rich in weather resistance and can irradiate the surrounding area over a relatively large area. Therefore, it is preferable to use the organic EL as a predetermined cylindrical light source housed in a waterproof structure by bending the organic EL.

  In addition, when used as an outdoor lighting device such as a garden lamp, it is also required to turn on only at night. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems of the prior art, and to provide an outdoor lighting device such as a garden lamp that has excellent weather resistance and can irradiate a wide area with uniform light.

  In order to achieve the above object, an outdoor lighting device according to the present invention includes a power control unit provided in a base unit and a light emission comprising an organic EL panel held by the base unit so as to surround the power control unit. A light-transmitting cover that covers the periphery of the light-emitting unit, and a canopy that covers the top surface of the light-transmitting cover. The organic EL panel emits surface light by power supplied from a power control unit, and the light-transmitting cover And uniform light is emitted around the side surface.

  Since the organic EL bent into a cylindrical shape is housed in a part of the structure and used as a light source, it has weather resistance and can irradiate the surroundings with uniform light. Moreover, the cylindrical diameter of the lighting device can be freely set by setting the cylindrical shape of the organic EL, and lighting devices of various sizes can be provided.

The partial perspective view which showed the external appearance structure of the principal part of the outdoor illuminating device of this invention. The disassembled perspective view which decomposed | disassembled and showed the outdoor illuminating device shown in FIG. Sectional drawing which showed the assembly structure of the outdoor illuminating device typically. The partial perspective view which showed the example which has arrange | positioned the solar panel to the canopy and equipped with the storage battery in the apparatus. The fragmentary perspective view which showed the example which provided the sensor for lighting detection in a part of support | pillar.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the outdoor lighting device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows an upper portion of a support column 1 and a light emitting unit 11 of an outdoor lighting device 10 as an embodiment of the present invention. FIG. 2 is an exploded perspective view of the outdoor lighting device 10 shown in FIG. As shown in FIG. 1, the outdoor lighting device 10 of the present embodiment has a base disk 12 fixed to the upper end 1 a of the steel column 1 and a lower end waterproofed along the outer periphery of the base disk 12. The bottom end of the transparent resin cover 13 as a light transmission cover and the circumferential groove 14 (see FIG. 2) formed on the base disk 12 is made of a synthetic resin having a cylindrical shape and fixed in a state where it is fixed. A housed organic EL panel 20 rolled into a cylindrical shape, a power control board 15 installed on the upper surface of the base disk 12 surrounded by the circumferential groove 14, and a canopy 16 covering the upper end of the resin cover 13. It is assembled.

  As shown in FIG. 1, the power supply to the outdoor lighting device 10 of the present embodiment is an external AC power supply 8, and by a DC current that has been AC-DC converted by a power control board 15 as a power control unit. The organic EL panel 20 is turned on. When the power control board 15 is a converter circuit that performs DC-DC conversion, an external DC power supply can also be used. In this case, as will be described later, for example, the storage battery 3 (see FIG. 4) may be stored in the support column 1 and an independent power source may be provided.

The components of the outdoor lighting device 10 described above will be briefly described.
The support column 1 is made of a weather-resistant steel pipe, and its lower end (not shown) has a shape that can be inserted into the ground of a garden. Moreover, it may replace with a sword-shaped front-end | tip part, may have a leg part or a pedestal which is not illustrated, and may install it in the state which extended the leg part to the flat place of a garden, or the stability of a pedestal.

  The base disk 12 is a resin molded part fixed to the upper end of the support column 1. A sealing member (not shown) is interposed at a connection portion between the resin cover 13 and the canopy 16, and the internal space is submerged by wind and rain. It is supposed not to. Organic EL is accommodated in the internal space. A cutout capable of supporting the lower end of the resin cover 13 is provided at the outer peripheral edge of the base disc 12 and is connected to the resin cover 13 through a sealing material (not shown) so as to be watertight. Moreover, the edge part of the power line wired in the support | pillar 1 is connected to the power control board 15 installed in the center part of the base disc 12 (refer FIG. 2). In this embodiment, as shown in FIG. 2, a circumferential groove 14 is formed on the upper surface of the base disk 12, and the lower end of the organic EL panel 20 rolled into a cylindrical shape is accommodated in the circumferential groove 14. The cylindrical shape of the organic EL panel 20 is maintained. In addition, you may apply | coat a viscous sealing agent to a connection part, without using sealing members, such as an O-ring, for a seal location.

  The organic EL panel 20 has a configuration similar to that of a known organic EL panel, and is configured by laminating a hole injection layer, a light emitting layer, an electron injection layer, etc. on a transparent electrode such as ITO (not shown), and a metal is formed thereon. It has the structure which laminated | stacked and used as the cathode. The organic EL panel 20 can freely bend the light emitting surface when a thin resin material that can be easily bent by an external force is used for a substrate on which an organic light emitting material is deposited. As shown in FIG. 2, the cylindrical shape is maintained by accommodating the lower end in the circumferential groove 14 of the base disk 12 when rounded into a cylindrical shape. In addition, an electrode (not shown) for supplying power to the panel is connected to the power control board 15 via a lead wire 22. In the present embodiment, a strip-shaped organic EL panel 20 (thickness 1 mm) having a circumferential length (width) sufficient to be a cylindrical shape having a height of 100 mm and a predetermined diameter is rounded to form a cylindrical shape.

  Here, the built-in structure of the organic EL panel 20 will be described with reference to FIGS. FIG. 3A is an example in which the lower end of the organic EL panel 20 is accommodated in the circumferential groove 14 formed in the base disk 12 and the cylindrical shape is maintained as described above. When the organic EL panel 20 to be used is thin, it is necessary to prevent the occurrence of cylindrical distortion. In that case, as shown in FIG. 3 (b), the support cylinder 18 is mounted on the base disk 12, and the outer periphery of the support cylinder 18 is covered with a cylindrical organic EL panel 20. A measure not to make the EL panel 20 itself independent is also preferable.

  The resin cover 13 is a transparent synthetic resin material that is molded in a cylindrical shape and has high weatherability and light resistance. At the time of installation, the surface emission state of the organic EL panel 20 accommodated therein can be efficiently transmitted to the surroundings. In consideration of the effect as the outdoor lighting device 10, the surface of the plate may be subjected to fogging or a pattern having fine irregularities that scatters and diffuses light.

  The canopy 16 is a lid-like body that is attached to the top of the resin cover 13 while maintaining watertightness. In this embodiment, a photoelectric switch 25 that functions as a light / dark sensor is attached to the top of the top. As shown in FIG. 2, the photoelectric switch 25 is connected to the power control board 15 via a signal line 23. The operation of the switch is set so that it is turned on (ON) in a state where the surroundings of the lighting device are below a predetermined darkness, such as after sunset.

  FIG. 4 shows an embodiment in which a solar panel (solar cell panel) 26 is provided on the top surface of the canopy 16 so that electric power for lighting at night is charged in the storage battery 3 built in the daytime. The storage battery 3 is preferably installed in the support column 1. In this embodiment, when the surroundings of the lighting device become dark at dusk, it is detected that the solar voltage has dropped below the threshold value, and the organic EL panel 20 is turned on by the storage battery 3.

  As described above, since the organic EL having a cylindrical shape is used as the light source in the space having water tightness and light resistance, the outdoor lighting device 10 is low in power and around the side of the light source. On the other hand, uniform surface emission can be irradiated. Moreover, since it is an outdoor device, it is affected by outside air, but even when the outside air temperature is low, there is no decrease in the amount of light of illumination, and there is no decrease in the response speed of light emission. Therefore, using this action, as shown in FIG. 5, a plurality of infrared sensors 27 may be installed on the column 1 to detect the surrounding state in the detection range 28 of the sensor. For example, it is possible to sequentially detect the movement of a moving object such as a person strolling through a passage in a garden, and to turn on the destination lighting. In the above description, the term “cylindrical shape” has been described with reference to an example of a cylindrical body having a substantially circular flat cross-sectional shape. However, the cross-sectional shape may be oval, elliptical, oval. Even if it is a circular shape having regular or irregular irregularities, it may be any shape as long as it effectively exhibits the surface light emitting function as the lighting device.

  As another effect, since no ultraviolet rays are emitted from the organic EL, insects do not approach even when used in a lighting device that performs continuous lighting at night. In addition, it is possible to design the illumination device for reflecting external light by taking advantage of the mirror-like surface of the organic EL when not emitting light.

  Thus, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope indicated in each claim. In other words, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Support | pillar 10 Outdoor lighting device 11 Light emission part 12 Base disk 13 Resin cover 14 Circumferential groove 15 Power control board 16 Canopy 20 Organic EL panel 25 Photoelectric switch 26 Solar cell panel

Claims (5)

  A power control unit provided in the base unit, a light emitting unit composed of an organic EL panel held on the base unit so as to surround the power control unit, a light transmission cover covering the periphery of the light emitting unit, and the light An outdoor lighting comprising: a canopy covering an upper surface of the transmission cover; and the organic EL panel emits surface light by power supplied from a power control unit, and emits uniform light around the side surface through the light transmission cover. apparatus.   The outdoor lighting device according to claim 1, wherein the organic EL panel is erected in a cylindrical shape along a circumferential groove formed on a plate of the base portion.   The outdoor lighting apparatus according to claim 1, wherein the organic EL panel is attached along an outer peripheral surface of a support cylinder provided upright on a plate of the base portion.   The base part, the light transmission cover, and the canopy are assembled while maintaining watertightness, and the organic EL panel is accommodated therein. Outdoor lighting device.   The said power control part is mounted on the board of a base part, and was installed so that the said organic EL panel might surround the circumference | surroundings, The said any one of Claim 1 thru | or 4 characterized by the above-mentioned. Outdoor lighting device.

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