JP4730142B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device suitable for use in lighting a road surface such as a road or a sidewalk.

Conventionally, for road lights that illuminate road surfaces such as roads and sidewalks, HID (High Intensity Discharge Lamps) lamps and fluorescent lamps have been widely used as light sources, and the light from this light source is efficiently applied to the road surface. And the reflective mirror for irradiating with substantially uniform illumination intensity is used (for example, refer patent document 1).
JP2000-222911

  However, the conventional lighting device has a problem that no matter how the reflecting mirror is designed, the leaked light leaking along the road cannot be eliminated and a light loss occurs. Furthermore, since light control of a single lamp light source requires a reflecting mirror having a dimension covering at least the lamp light source, not only the size of the apparatus main body increases but also the weight of the apparatus main body increases. For this reason, in the type of lighting device in which the apparatus main body is supported by the pole, the wind pressure load applied to the pole may increase, and there is a problem that the cost of the pole member and the base member increases to maintain the strength of the pole.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an illuminating device that can be reduced in size and weight and can be illuminated efficiently.

In order to achieve the above object, the present invention provides an illumination device that illuminates a road surface with light from a light source, and includes an illumination device body supported at a base end. The mounting base is formed so as to increase stepwise from the proximal end to the distal end, the mounting surface is provided on the step surface of each mounting step portion of the mounting base , and one or a plurality of LEDs are arranged. The light source is configured by attaching a plurality of LED modules to each mounting surface of the mounting base.

Moreover, the present invention is characterized in that, in the above-mentioned invention, each mounting surface of the mounting base is inclined to adjust the mounting angle of the LED module to adjust the irradiation direction of each LED module.

  Moreover, the present invention is characterized in that, in the above invention, a plurality of stepped step portions are provided on the mounting base, and the LED module is disposed on each step portion.

  Further, according to the present invention, in the above invention, the LED module in which the wide-angle LED is arrayed and the LED module in which the narrow-angle LED is arrayed are attached to the mounting base, and the LED module in which the wide-angle LED is arrayed is provided. It is characterized by illuminating the immediate vicinity of the lamp.

  Moreover, the present invention is characterized in that, in the above invention, a transparent cover member that covers the light source is provided, and the cover member is formed so that light from each of the LED modules is substantially directly incident.

  Moreover, this invention is provided with the power supply device which controls each light output of the said LED module individually in the said invention.

  According to the present invention, since the light source is configured by mounting a plurality of LED modules each having one or a plurality of LEDs arranged on a mounting base, the size and weight can be reduced as compared with a conventional lighting device using a lamp as a light source. It becomes possible and the reflecting mirror becomes unnecessary, so that the cost of the apparatus can be suppressed. Furthermore, since unnecessary light such as leakage light does not occur, illumination can be performed efficiently.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, a road lamp is exemplified as an aspect of an illumination device that illuminates a road surface.
FIG. 1 is a diagram showing a configuration of a road light 1 according to this embodiment together with a mode of use. As shown in this figure, the road lamp 1 has a lighting device main body 2 and a pole 3 that supports the lighting device main body 2 with a top portion 4, and the pole 3 further includes an upper stage pole 3A and a lower stage pole 3B. It is comprised as what is called a stepped pole with. The road lamp 1 is erected at predetermined intervals along the traffic direction P1 on the ground G beside the road 5. In this embodiment, the road width W of the road 5 is set to 6.5M (meters), and the mounting height H of the lighting device main body 2 is set to 6M. In addition, as the pole 3, it is possible to use a thing other than the stepped pole.

  FIG. 2 is a perspective view showing a configuration of the lighting device body 2. As shown in this figure, the illuminating device main body 2 has a plurality of LEDs 10 as light sources. Each LED 10 is packaged, and as shown in FIG. 3, one or a plurality (four in the illustrated example) of LEDs 10 are mounted on a single mounting substrate 11 to form an LED module 12. Is supplied with driving power via a power supply line (not shown). The mount substrate 11 is formed of a highly thermally conductive material, and the heat generated by the LED 10 is efficiently radiated through the mount substrate 11.

  Each LED 10 includes a light emitting unit 13 in which a light emitting diode element is molded in a resin material and the like, and a sealing body 14 formed from an epoxy resin or the like that seals the light emitting unit 13. A reflective surface 14A is formed on the side surface of the body 14, and radiates light from the light emitting unit 13 toward the front. The light emission angle of the LED 10 is defined by the shape of the reflecting surface 14A. In this embodiment, the narrow-angle light distribution type narrow-angle type LED 10A and the wide-angle light distribution type wide-angle type LED 10B are used as light sources, so that the lighting device body 2 These light characteristics are assumed to be adapted to the road 5 to be irradiated, which will be described in detail later.

FIG. 4 is a view showing both the bottom surface, the plane surface, the front surface, the back surface, and the side surface of the lighting device body 2. In the following description, when the road lamp 1 is installed on the road 5, the surface of the illuminating device body 2 facing the ground G is used as the bottom surface, and the surface of the illuminating device body 2 viewed from the crossing direction on the road 5 side is used. It is defined as the front.
As shown in FIG.2 and FIG.4, the illuminating device main body 2 includes a case body 20 as a housing having a top plate 20A and a back plate 20B, a light source device 21 provided in the case body 20, and a light source device. And a cover glass 22 as an embodiment of a transparent cover member fitted into the case body 20 so as to cover the bottom surface, the front surface, and the side surface of 21, and further supports the case body 20 on the top 4 of the pole 3. And a portion 23. The support portion 23 has a substantially L-shaped support member 23A that extends from the top plate 20A to the back plate 20B of the case body 20 and is bent vertically downward. A pole is inserted into the insertion hole 23B formed in the support member 23A. The tip of the top part 4 of 3 is inserted, and the illuminating device main body 2 is supported by the pole 3.

  The light source device 21 includes a plurality of the LED modules 12 and a mounting base 30 to which these LED modules 12 are attached. As shown in FIGS. 4 and 5, the mounting base 30 is formed by stepping a metal plate such as an aluminum plate into four steps and having four LED mounting step portions 30 </ b> A to 30 </ b> D. . As shown in FIG. 5, mounting holes 32 for mounting one or a plurality of LEDs 10 are formed on the step surfaces 31 </ b> A to 31 </ b> D constituting the steps of the LED mounting steps 30 </ b> A to 30 </ b> D. Thus, the LED module 12 having the one or more LEDs 10 is mounted from the back surface (inside) of the mounting base 30, and the LEDs 10 are exposed from the mounting holes 32.

As shown particularly in the bottom view of FIG. 4, the mounting base 30 is formed in a plan view symmetrical shape with respect to the center line X, and similarly, each LED module 12 is symmetrical with respect to the center line X. It arrange | positions and it is comprised so that it may become a substantially symmetrical light distribution in a horizontal direction (traffic direction P1).
A mounting surface 33 is formed for each of the LED modules 12 on each of the step surfaces 31A to 31D. Each of the mounting surfaces 33 is formed to be inclined by the inclination angle θ1 with respect to the vertical direction Z1 and the inclination angle θ2 with respect to the horizontal direction Z2, and the LED module 12 is adjusted by appropriately adjusting the inclination angle θ1. The vertical angle α of the irradiation light of the LED module 12 is defined, and the horizontal angle β of the irradiation light of the LED module 12 is defined by appropriately adjusting the inclination angle θ2 in the horizontal direction Z2. In order to efficiently radiate light in the vertical angle α and horizontal angle β directions of the LED module 12 defined in this way from the lighting device main body 2, the glass surface 22 </ b> A facing each LED module 12 is formed on the cover glass 22. It is formed substantially parallel to the mounting surface 33, and the light of the LED module 12 is directly incident on the glass surface 22A to suppress the reflection component on the glass surface 22A. In addition, instead of the configuration in which the light emission direction of the LED module 12 is adjusted by the inclination angles θ1 and θ2 of the mounting surface 33, a mounting angle adjusting member such as a plate member for adjusting the mounting angle between the mounting surface 33 and the optical module 12. The light emission direction of the LED module 12 may be adjusted by interposing.

  Specifically, the mounting surface 33 includes three mounting surfaces 33A1, 33A2, and 33A3 formed from the front surface to one side surface of the lowermost LED mounting step 30A (uppermost at the time of mounting). On the other side surface, mounting surfaces 33A2 ′ and 33A3 are formed by reversing the inclination angle θ2 of the mounting surfaces 33A2 and 33A3 with respect to the horizontal direction Z2. The second LED mounting step 30B is provided with mounting surfaces 33B and 33B ′ which are symmetrical with respect to the center line X, and the third LED mounting step 30C is formed with respect to the center line X. The mounting surfaces 33C and 33C ′ that are symmetrical with respect to the surface are formed, and only one mounting surface 33D having an inclination angle θ2 of 0 ° is formed on the fourth LED mounting step 30D. A total of ten mounting surfaces 33 are formed.

  The inclination angles θ1 and θ2 of the mounting surfaces 33 are different from each other. As a result, the mounting angle is different for each LED module 12 mounted on each mounting surface 33, so that the vertical angle α and the horizontal angle β in the light irradiation direction are different. Each LED module 12 irradiates light toward a plurality of locations on the road surface of the road 5 to illuminate the road surface. Specifically, each LED module 12 attached to the ten attachment surfaces 33 illuminates nine different irradiation points SP1 to SP5 and SP5 'on the road surface of the road 5, as shown in FIG. FIG. 7 shows the correspondence between the LED module 12 attached to each attachment surface 33 and the road surface irradiation position of the LED module 12. As shown in this figure, each LED module 12 illuminates the road surface, whereby the road surface in the direction along the front side of the road light 1 and the traffic direction P1 is illuminated. At this time, since the LED 10 having high directivity and a light emission range narrower than that of a general lamp is used as a light source, no leakage light is generated on the back side of the road lamp 1, and light damage due to the leakage light can be prevented. .

In general, in road lighting, as an index value to be achieved in order to realize a sufficient visual environment for a driver of an automobile, the total uniformity U0 is 0.4 or more and the average road surface brightness L is 0.7 cd / m. ^An index value of ² or more (in the case of general national highways) is set. Therefore, in this embodiment, the amount of light emitted toward each irradiation point SP is increased by increasing / decreasing the number of LEDs 10 mounted on each LED module 12 and / or adjusting the output of each LED module 12. By adjusting, the above index value is achieved. In particular, in the present embodiment, the narrow angle type LED 10A is mainly used for the LED 10 of the LED module 12, and the luminance at a position far from the road light 1 (for example, irradiation points SP2, SP2 ′, SP5, SP5 ′, etc.) is sufficient. To be secured.

  In road lighting, it is desirable to maintain the lane axis uniformity Ul at 0.5 or more. However, if all of the LEDs 10 as light sources are the above-mentioned narrow-angle type LEDs 10A (for example, the central axis luminous intensity is 500 cd or more and the opening of 1/10 beam is approximately 36 degrees), the area illuminated by one LED 10 is relatively narrow. Therefore, although the average road surface brightness is maintained, the road surface uniformity, in particular, the lane axis uniformity Ul on the lane axis 5A (see FIG. 6) immediately below the road light 1 is maintained at 0.5 or more. It becomes difficult. Therefore, in the present embodiment, the LED module 12 of the LED mounting step 30B that illuminates the illumination points SP4 and SP4 ′ in the vicinity of the lane axis 5A on the road lamp 1 side is connected to the wide-angle type LED 10B (for example, a central axis luminous intensity of 100 cd or more, 1 / 10 beam opening is 90 degrees or more), and the LED module 12 directly below the road light 1 including the illumination points SP4 and SP4 ′ from the road light 1 to the lane axis 5A on the road light 1 side. By illuminating the area 70 in the vicinity, the lane axis uniformity Ul is increased.

  A power supply device 60 for supplying driving power to each LED module 12 of the light source device 21 is disposed inside the mounting base 30 as shown in FIG. Since the mounting base 30 is formed in a stepped shape as described above, the storage space 35 for storing the power supply device 60 can be secured inside thereof, and the lighting device body 2 can be downsized. Of course, the power supply device 60 may be provided in the lighting device main body 2 or may be built in the ball 3.

The same driving power may be given to each LED module 12 from the power supply device 60 to each LED module 12, and different driving power is applied to each LED module 12 or each LED 10. You may make it give. In particular, by configuring the power supply device 60 so that the driving power can be controlled for each LED module 12, the light output of each LED module 12 can be individually adjusted, so that the initial illuminance correction at the beginning of installation and the desired at the installation site Illuminance correction to obtain the optical characteristics of
Further, for example, in the case of rain, the light is opposed to the traveling direction of the vehicle (so-called counter beam), and is opposed to the traveling direction of the vehicle so as to prevent reflected light on the road surface. Each LED module 12 that illuminates the side, that is, the output of each LED module 12 arranged on the left side or the right side when the road light 1 is viewed from the front is weakened, or some LED modules 12 are turned off. It is also possible to control as described above.

As described above, according to the present embodiment, the light source device 21 is configured by attaching a plurality of LED modules 12 in which one or a plurality of LEDs 10 are arranged to the mounting base 30, so that an HID lamp or the like is used as a light source. Compared to a conventional lighting device, the lighting device body 2 can be reduced in size and weight, and a reflecting mirror is not required, so that the device cost can be reduced.
Further, with the reduction in size and weight of the lighting device main body 2, the wind pressure load is reduced, the pole strength can be reduced, and the costs of the pole member and the base member can be reduced.
Furthermore, since the LED 10 is used as a light source, there is no need to irradiate light in a useless direction causing leakage light, and the road surface can be efficiently illuminated.

Further, according to the present embodiment, the LED module 12 mounting angle with respect to the mounting base 30, that is, the inclination angles θ1 and θ2 of the mounting surface 33 are adjusted to adjust the irradiation direction of the LED module 12, so that each LED The light irradiation direction of the module 12 can be easily adjusted and controlled, and light distribution suitable for the shape of the road surface and usage can be easily made simply by adjusting the mounting angle. Furthermore, since leakage light does not occur, the efficiency can be increased.
In addition to this, according to the present embodiment, the mounting base 30 is provided with a plurality of stepped mounting steps 30A to 30D, and the LED module 12 is disposed on each mounting step 30A to 30D. The LED modules 12 are also arranged in the height direction, and the horizontal size of the mounting base 30 is smaller than the configuration in which the LED modules 12 are arranged in a line around the plate-shaped mounting base. can do.
Furthermore, by adopting a configuration in which the power supply device 60 that supplies driving power to the LED module 12 is housed inside the mounting base 30, the space inside the mounting base 30 formed in a staircase shape can be effectively utilized. .

Further, according to the present embodiment, the LED module 12 in which the wide-angle LEDs 10B are arranged illuminates the vicinity immediately below the road light 1. Generally, since the irradiation area becomes narrower as the distance from the LED to the irradiation surface becomes shorter, unevenness in illuminance is likely to occur when illuminated by a plurality of LEDs. However, according to this embodiment, the LED module 12 having the wide-angle type LED 10B. As a result, a wide range in the vicinity of the road lamp 1 is illuminated, so that unevenness in illuminance can be suppressed and the uniformity can be increased.
Further, according to the present embodiment, since the glass surface 22A of the cover glass 22 is formed so that light from each of the LED modules 12 is substantially directly incident, the reflected light component on the glass surface 22A is suppressed and illumination is performed efficiently. be able to.
Moreover, according to this embodiment, since the power supply device 60 which controls each light output of the LED module 12 individually is provided, by adjusting the light output of each LED module 12, initial illuminance correction and installation at the initial installation time are performed. Illuminance correction at the site, light distribution control and dimming control according to the installation road and installation environment can be easily performed.

In addition, embodiment mentioned above shows the one aspect | mode of this invention to the last, and a deformation | transformation and application are arbitrarily possible within the scope of the present invention.
For example, in the above-described embodiment, the road lamp 1 having the configuration in which the lighting device main body 2 is supported by the pole 3 is illustrated. However, the present invention is not limited thereto, and the lighting device main body 2 is provided on, for example, a utility pole to illuminate the road surface. The present invention can also be applied to a lighting device having a configuration.
In addition, for example, in the above-described embodiment, a road lamp is exemplified as one aspect of the illumination device that illuminates the road surface. However, the present invention is not limited thereto, and the illumination device or the street that efficiently illuminates a limited area such as a sidewalk or a parking lot. The present invention can also be applied to street lights.

The figure which shows the structure of the road light which concerns on embodiment of this invention with the aspect of use. The perspective view of an illuminating device main body. The schematic block diagram of a LED module. The figure which shows the structure of an illuminating device main body. The perspective view which shows the structure of a mounting base. The figure for demonstrating the aspect of light irradiation. The figure which shows a response | compatibility with an LED module, a road surface irradiation position, and LED type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road light 2 Illuminating device main body 12 LED module 20 Case body 21 Light source device 22 Cover glass 30 Mounting base 30A-30D LED mounting step part 33 Mounting surface 60 Power supply device

Claims (5)

In the lighting device that illuminates the road surface with light from the light source,
A lighting device main body supported at a base end, the lighting device main body including a mounting base formed so as to increase stepwise from the base end toward the tip when viewed from the road surface side; An illumination characterized in that a mounting surface is provided on a step surface of each mounting step portion, and the light source is configured by mounting a plurality of LED modules each having one or a plurality of LEDs arranged on each mounting surface of the mounting base. apparatus. The lighting device according to claim 1.
An illuminating device characterized in that each mounting surface of the mounting base is inclined to adjust the mounting angle of the LED module to adjust the irradiation direction of each LED module. The lighting device according to claim 1 or 2 ,
An LED module in which wide-angle LEDs are arrayed and an LED module in which narrow-angle LEDs are arrayed are attached to the mounting base, and the LED module in which the wide-angle LEDs are arrayed illuminates the vicinity immediately below the lamp. A lighting device. In the illuminating device in any one of Claims 1 thru | or 3 ,
An illumination device comprising: a transparent cover member that covers the light source, wherein the cover member is formed so that light from each of the LED modules is substantially directly incident thereon. In the illuminating device in any one of Claims 1 thru | or 4 ,
An illumination device comprising: a power supply device that individually controls the light output of each of the LED modules.

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