JP5505238B2 - Reflector, LED module, and lighting fixture - Google Patents

Description

  The present invention relates to an LED module reflecting mirror, an LED module, and a lighting fixture in which LEDs are provided on an LED substrate.

  In recent years, in the field of lighting, it has been widely practiced to employ LEDs as light sources instead of lamps. In particular, with the increase in output of LEDs, there are a wide variety of lighting fixtures equipped with LEDs as light sources, and light sources for outdoor lighting fixtures that illuminate not only indoor lighting fixtures but also a wide range of road lights, security lights, etc. It is also adopted. In such a lighting device that irradiates a wide area, when an LED is used as a light source, the irradiation area is divided into a plurality of areas, and one or a plurality of LEDs are provided for each area (for example, the light source is configured). , See Patent Document 1).

JP 2006-59005 A

However, it is necessary to construct the light source by assembling each LED while adjusting the inclination or the like so that the light is directed to the corresponding area, and there is a problem that the assembly work of the LED is complicated.
This invention is made | formed in view of the situation mentioned above, and provides a reflective mirror suitable for the case where LED is used for the light source of the lighting fixture which illuminates a comparatively wide range, an LED module, and a lighting fixture. Objective.

In order to achieve the above object, the present invention provides a reflecting mirror provided on an LED substrate provided with an LED, a first opening portion that opens in the optical axis direction of the LED, and a direction substantially orthogonal to the optical axis. A reflective surface on an inner peripheral surface surrounding the periphery of the LED, and direct light of the LED from the first and second open portions; Irradiated with reflected light, the reflective surface of the inner peripheral surface is provided with a different reflective area on each of the LED side and the first open portion side, and the farthest distance by the reflected light of the reflective area on the LED side Irradiation is performed, and the near side of the reflected light irradiation area is irradiated with the reflected light of the reflection area on the first opening portion side .

  Further, the present invention is characterized in that, in the reflecting mirror, one irradiation area is formed by the direct light and the reflected light, and expansion of the irradiation area is restricted by an opening width of the first and second opening portions. To do.

  In order to achieve the above object, the present invention includes an LED substrate provided with LEDs and the reflecting mirror described above, and the LED substrate and the pair of reflecting mirrors are arranged so that irradiation areas overlap with each other. Provided is an LED module characterized in that a plurality of LED modules are arranged on top.

  In order to achieve the above object, the present invention comprises at least one pair of the above-described LED modules, and each pair of LED modules is back-to-back so that the second open portions of the reflecting mirrors face in opposite directions. Provided is a lighting apparatus characterized by being provided in the above.

  According to the present invention, the LED is formed in a substantially U-shape having a first opening portion that opens in the optical axis direction of the LED and a second opening portion that opens in a direction substantially orthogonal to the optical axis. Since the reflecting surface is provided on the surrounding inner peripheral surface, and the reflecting mirror irradiates the direct light and reflected light of the LED from the first and second open portions, the direct light of the LED irradiated from each of the first and second open portions. One irradiation area can be formed in a wide range by light and reflected light.

It is a figure which shows the structure of the security light which concerns on embodiment of this invention, (A) is sectional drawing of a security light, (B) shows the bottom view of a security light. It is a figure which shows the structure of a LED module, (A) is a top view of a LED module, (B) is a side view of a LED module. It is a perspective view of a LED module, (A), (B) is the figure which looked at the internal peripheral surface of a reflective mirror from a different direction, respectively. It is explanatory drawing of the light distribution of a security light. It is a figure which shows the structure of a unit LED pair, (A) is a front view which faces the 2nd open part of a unit LED pair, (B) is a perspective view of a unit LED pair. It is a figure which shows the response | compatibility of the ratio of the light which hits each reflective area provided in the reflective surface, and the target irradiation area in a road surface.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a security light 1 according to the present embodiment, where FIG. 1 (A) is a cross-sectional view of the security light 1 and FIG. 1 (B) is a bottom view of the security light 1.
The crime prevention light 1 illuminates a street with a predetermined brightness for the purpose of crime prevention, and includes an appliance body 2 that extends and is installed on the road surface. The instrument body 2 of the present embodiment is formed in a thin plate shape that is substantially rectangular in bottom view and extends from the road surface side front end 2A to the rear end 2B. The rear end 2B is provided with a fixture 3 for fixing the instrument body 2 to, for example, a fastener (not shown) fixed to a utility pole or the like.

The instrument body 2 is provided with a resin-made flat cover 4 that opens as an irradiation opening 8 on the entire bottom surface and covers the irradiation opening 8. In addition, a rectangular plate-shaped light source installation plate 5 is provided in the irradiation opening 8 of the instrument body 2, and a plurality of LED modules 10 are assembled on the surface of the light source installation plate 5 to constitute the light source unit 6. Yes. In a space between the light source installation plate 5 and the instrument main body 2, circuit components 7 such as a power source and a lighting circuit for lighting the LED module 10 are disposed.
As shown in FIG. 1A, the light source installation plate 5 is provided substantially flush with the irradiation opening 8 so that the LED module 10 assembled to the light source installation plate 5 is disposed outside the instrument body 2. Thus, the efficiency of the instrument is improved without the light of the LED module 10 being shielded by the side surface of the instrument body 2 or the like.
The light source unit 6 is configured to have a light distribution that illuminates a wide area extending in the traffic direction of the street corresponding to both sides of the appliance body 2 as well as directly below the appliance body 2 on the street (including the front side). Yes. Specifically, the light source unit 6 includes the LED module 10 that illuminates the two directions of the traffic direction.

FIG. 2 is a diagram illustrating the configuration of the LED module 10, FIG. 2A is a plan view of the LED module 10, and FIG. 2B is a side view of the LED module 10. 3 is a perspective view of the LED module 10, and FIGS. 3A and 3B are views of the inner peripheral surface of the reflecting mirror 12 as seen from different directions.
As shown in these drawings, the LED module 10 includes a plurality of (five in the illustrated example) LEDs 11 arranged in a row on a rectangular plate-shaped LED board 13 and a reflecting block 12 in which the reflecting mirrors 12 of the respective LEDs 11 are integrally formed. The body 14 is provided and configured in a bar shape, and is assembled by screwing it to the plate surface of the light source installation plate 5 at both ends of the LED substrate 13. As shown in FIG. 2, the screw 15 at the time of screwing passes through the LED substrate 13 and the reflection block body 14, and is fastened to be fixed to the light source installation plate 5.

The LED 11 is an LED that emits white light, and is mounted with the optical axis K oriented substantially perpendicular to the substrate surface of the LED substrate 13. As described above, the plurality of LEDs 11 are arranged in a row on the LED substrate 13, and the reflecting mirror 12 is provided for each. Each of the reflecting mirrors 12 has the same shape, and the light distribution comprising the pair of the LED 11 and the reflecting mirror 12 is the same in any pair. The pair of the LED 11 and the reflecting mirror 12 is provided on the LED substrate 13 at a sufficiently narrow interval so that the respective irradiation areas overlap each other.
That is, according to the LED module 10, since the pair of LEDs 11 and the reflecting mirror 12 irradiate the entire irradiation area irradiated by the LED module 10, one irradiation area is divided into a plurality of areas and each area is individually separated. Compared to the conventional configuration of irradiating with the LED, it is not necessary to adjust each LED in order to make the light distribution in the irradiation area appropriate, and the assembly is easy.

  In addition, since each of the pair of the LED 11 and the reflecting mirror 12 is arranged at a sufficiently narrow interval so that the irradiation areas overlap each other, the number of pairs in one LED module 10 is increased or decreased, or the LED module 10 is By arranging in series, the illuminance of the irradiation area can be adjusted, and the LED module 10 having a light amount corresponding to the application can be easily configured.

  In this embodiment, as shown in FIG. 1 (B), two LED modules 10 are arranged in series and irradiated in one direction of the traffic direction of the street, and these two LED modules arranged in series are irradiated. The light source unit 6 is configured to illuminate both directions in the traffic direction of the street, with a pair of 10 arranged back to back so that a second open portion 18 of the reflecting mirror 12 described later faces in opposite directions.

FIG. 4 is an explanatory diagram of the light distribution of the security light 1.
As shown in FIG. 4, the security light 1 is disposed at a height of 4.5 meters from the road surface 30 of a 5-meter wide street, and one LED module 10 allows the traffic light direction D of the road surface 30 to be directly below. The area of the entire road surface extending 20 m ahead along the direction is irradiated. As described above, when the LED modules 10 are arranged back to back, the light source unit 6 is irradiated up to 20 m ahead in both directions of the traffic direction D on the road surface 30.
In the LED module 10, a pair of the LED 11 and the reflecting mirror 12 has a light distribution similar to the light distribution of the LED module 10 as described above. The area of the entire road surface extending 20 meters along the road is configured to be able to irradiate alone.
In the following description, a pair of the LED 11 and the reflecting mirror 12 is referred to as a “unit LED pair” and is denoted by reference numeral 20.

The unit LED pair 20 irradiates a direct area with a direct light so as to irradiate a wide area along one direction of the road surface 30, and the reflecting mirror 12 causes a distance (20 m away) in the traffic direction D of the road surface 30. I'm going to irradiate.
That is, as shown in FIG. 2, the reflecting mirror 12 is formed in a substantially U shape in a plan view, and is disposed so as to surround the LED 11. In other words, the reflecting mirror 12 is opened in the direction of the optical axis K of the LED 11 and mainly passes direct light, and the first opening portion 16 that is opened in a direction substantially orthogonal to the optical axis K and mainly passes reflected light. The reflecting surface 17 is provided on the inner peripheral surface surrounding the periphery of the LED 11. And by this structure, the direct light and reflected light of LED11 are irradiated from each of the 1st and 2nd open parts 16 and 18, and one irradiation area is formed. At this time, the reflecting surface 17 mainly forms reflected light traveling in the traffic direction D while spreading in the width direction of the road surface 30 from the second opening 18.

Specifically, as shown in FIG. 4 (B), when the unit LED pair 20 is arranged at a height of 4.5 meters from the road surface 30, the first opening portion 16 has a traffic on the road surface 30 from directly below. An opening is made so as to irradiate an area of the entire road surface extending 10 meters along the direction (referred to as “direct light irradiation area Ra”), and the reflecting surface 17 is at least as shown in FIG. It is formed to irradiate an area (referred to as “reflected light irradiation area Rb”) adjacent to the direct light irradiation area Ra up to 20 meters along the traffic direction with reflected light.
Accordingly, a unit LED pair 20 irradiates a wide area continuously from the direct light irradiation area Ra to the reflected light irradiation area Rb.

  However, when the reflected light irradiation area Rb is simply irradiated with the reflected light of the reflecting surface 17, uneven illuminance between the direct light irradiation area Ra and the reflected light irradiation area Rb is significantly generated. Therefore, in the present embodiment, the light quantity ratio between the direct light and the reflected light, that is, the ratio of the light reflected by the reflecting surface 17 is set to about 70% of the radiated light of the LED 11, and the direct light is partly reflected by this reflected light. Irradiance unevenness of the entire irradiation area is suppressed by irradiating the irradiation area Ra.

FIG. 5 is a diagram showing the configuration of the unit LED pair 20, FIG. 5A is a front view of the unit LED pair 20 facing the second opening 18, and FIG. 5B is a perspective view of the unit LED pair 20. is there.
As shown in this figure, the reflecting surface 17 of the reflecting mirror 12 is provided with seven reflecting areas (reflecting surfaces) W1 to W7. FIG. 6 is a diagram showing the correspondence between the ratio of light falling on the reflection areas W1 to W7 and the target irradiation area on the road surface 30. By providing these reflection areas W1 to W7 on the reflection surface 17, the irradiation area of the road surface 30 is shown. The whole is irradiated uniformly.

Referring to each of the reflection areas W1 to W7, the reflection surface 17 is provided with a reflection area W1 on the LED 11 side between the LED 11 and the first opening portion 16, as shown in FIG. Reflection areas W6 and W7 are provided on the 16th side. In addition, a reflection area W3 is provided at a position where the reflection surface 17 is located on the side of the LED 11 when viewed from the second opening 18.
The reflection area W1 is a paraboloid surrounding the periphery of the LED 11, and the reflected light irradiation area Rb and the near side along the traffic direction from the reflected light irradiation area Rb, that is, the direct light irradiation area Ra. The reflected light that irradiates the area straddling both of the far-side areas C in FIG. The reflection areas W6 and W7 respectively form reflected light that irradiates the area C that is on the near side of the reflected light irradiation area Rb and on the far side of the direct light irradiation area Ra. Among these, the reflective area W6 forms reflected light that irradiates the area C1 on the front side in the width direction of the road surface 30 (the installation side of the security light 1), and the reflective area W7 and the reflective area W3 are on the far side in the width direction. The reflected light that irradiates the area C2 is formed.

In this way, by irradiating the reflected light irradiation area Rb, which is the farthest of the irradiation area irradiated by the unit LED pair 20, with the reflection area W1 on the side closer to the LED 11, a sufficient amount of light is allocated to the farthest irradiation. The remaining amount of light can be distributed to the area C on the near side of the reflected light irradiation area Rb to suppress uneven illuminance with direct light.
Note that a reflective area W2 is provided at a location facing the reflective area W3 when the reflective surface 17 is viewed from the second open portion 18, and the reflected light of the reflective area W2 is larger than the area C1 on the front side in the width direction. Furthermore, since there is a possibility of irradiating the outer side A1 of the road surface 30 located on the near side, the reflection surface of the reflection area W2 is formed substantially horizontally with the optical axis K and the amount of reflected light is very small.

  Further, the reflection surface 17 is provided with reflection areas W4 and W5 on both sides of the reflection area W1, the reflection areas W6, and W7, respectively. The reflective area W5 forms reflected light that irradiates the area C and the area B (ie, the near direct light irradiation area Ra) on the near side (near field) from the area C in the direct light irradiation area Ra. Further, the reflection area W4 forms an area B1 on the near side in the width direction of the road surface 30 of the area B and the reflected light that irradiates the area C1.

Here, since the LED 11 of the unit LED pair 20 can be regarded as a point light source, if the LED 11 is not surrounded by the reflecting mirror 12, the light spreads in a wide range immediately below, and leakage light is generated on the outer sides A1 and A2 (FIG. 4) of the road surface 30. . On the other hand, the opening widths E1 and E2 (see FIGS. 2 and 3) of the first opening portion 16 and the second opening portion 18 of the reflecting mirror 12, respectively, in the opening width E1 and E2 directions (the width of the road surface 30). The direct light component in the direction) is cut and controlled as reflected light, so that the spread of light directly under is prevented, and an irradiation area extending with a certain width from directly under the traffic direction D can be formed, A light source suitable for use in lighting the road surface 30 is configured.
In addition, since the unit LED pair 20 realizes light shielding in the width direction of the road surface 30 by itself, the instrument main body 2 is provided with a shielding member for preventing light leaking to the outer sides A1 and A2 of the road surface 30. There is no need to assemble separately, and the assembly work of the instrument main body 2 becomes easy.

Thus, according to the present embodiment, the substantially U-shape having the first opening portion 16 that opens in the direction of the optical axis K of the LED 11 and the second opening portion 18 that opens in the direction substantially orthogonal to the optical axis K. The reflecting surface 17 is provided on the inner peripheral surface surrounding the periphery of the LED 11, and the first and second opening portions 16 and 18 are the reflecting mirrors that irradiate the direct light and the reflected light of the LED 11. One irradiation area can be formed in a wide range by direct light and reflected light of the LED 11 irradiated from each of the second open portions 16 and 18.
In particular, according to the reflecting mirror 12 of the present embodiment, an area (reflected light irradiation area Rb) adjacent to the direct light irradiation area Ra of direct light is irradiated with the reflected light, and the reflected light irradiation area Ra is reflected from the direct light irradiation area Ra. In order to form an irradiation area continuously extending in one direction (traffic direction D) over Rb, the optical axis K illuminates the LED module 10 including the reflecting mirror 12 and the irradiation direction of the reflected light is the traffic direction. By assembling so that it may face D, the light source part 6 is comprised, and the light source part 6 suitable for irradiating the traffic direction D of the road surface 30 to a distant place can be simplified.

  Moreover, according to this embodiment, since the expansion of the irradiation area of the LED module 10 is controlled and regulated by the opening widths E1 and E2 of the first and second opening portions 16 and 18, the distance in the traffic direction D from directly below. An irradiation area extending with a constant width can be formed, and a light source suitable for illumination of the road surface 30 is configured. Moreover, since it is not necessary to separately attach a shielding member for preventing leakage light to the outer sides A1 and A2 of the road surface 30 to the instrument main body 2, the assembling work of the instrument main body 2 becomes easy.

  Further, according to the present embodiment, the reflection surface 17 on the inner peripheral surface of the reflection mirror 12 is provided with the reflection area W1 and the reflection areas W6 and W7 on the LED 11 side and the first open portion 16 side, respectively. The reflected light irradiation area Rb that is the farthest of the irradiation area is irradiated with the reflected light of the area W1, and the front side of the reflected light irradiation area Rb is irradiated with the reflected light of the reflection areas W6 and W7 on the first opening portion 16 side. It was set as the structure to do. Thereby, by irradiating the farthest reflected light irradiation area Rb in the reflective area W1 on the side closer to the LED 11, a sufficient amount of light to be distributed to the farthest irradiation is secured, and the remaining light quantity is more than the reflected light irradiation area Rb. By allocating to the area C on the near side, uneven illuminance with direct light can be suppressed.

  According to the present embodiment, the LED module 10 is configured by connecting a plurality of unit LED pairs 20 that are pairs of the LED 11 and the reflecting mirror 12 on the LED substrate 13 so that the irradiation areas overlap. Thereby, the light quantity can be easily adjusted without changing the light distribution by increasing or decreasing the number of unit LED pairs 20 or arranging a plurality of LED modules 10 in series.

  In addition, according to the present embodiment, the light source unit 6 is configured by including at least one pair of LED modules 10 and arranging each pair of LED modules 10 back-to-back so that the second open portions 18 of the reflecting mirrors 12 face each other. Therefore, the light source unit 6 suitable for the crime prevention light 1 that irradiates a linearly extending range such as a street or a road surface 30 of the road can be easily configured.

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 crime prevention lamp 1 is illustrated as the lighting fixture according to the present invention, but the present invention is naturally applicable to various lighting fixtures used outdoors or indoors.
Moreover, the division | segmentation aspect of the reflective areas W1-W7 of the reflective surface 17 is an example to the last, Comprising: You may change suitably with the illumination intensity distribution calculated | required by a lighting fixture.

1 Security light (lighting fixture)
2 Instrument body 5 Light source installation plate 6 Light source unit 10 LED module 11 LED
DESCRIPTION OF SYMBOLS 12 Reflection mirror 13 LED board 14 Reflection block body 16 1st opening part 17 Reflecting surface 18 2nd opening part 20 Unit LED pair 30 Road surface D Traffic direction E Opening width K Optical axis Ra Direct light irradiation area Rb Reflected light irradiation area W1- W7 Reflection area

Claims (4)

A reflecting mirror provided on an LED substrate provided with LEDs,
An inner periphery that is formed in a substantially U-shape having a first opening portion that opens in the optical axis direction of the LED and a second opening portion that opens in a direction substantially orthogonal to the optical axis, and surrounds the periphery of the LED A reflective surface is provided on the surface, and direct light and reflected light of the LED are irradiated from the first and second open portions ,
The reflection surface of the inner peripheral surface is provided with different reflection areas on the LED side and the first open portion side, and the reflected light from the reflection area on the LED side is irradiated with the farthest distance. A reflector that irradiates the front side of the irradiation area with the reflected light of the reflection area on the first opening portion side .   2. The reflecting mirror according to claim 1, wherein one irradiation area is formed by the direct light and the reflected light, and expansion of the irradiation area is restricted by an opening width of the first and second opening portions. An LED substrate provided with LEDs, and the reflecting mirror according to claim 1 or 2 ,
An LED module, wherein a plurality of pairs of the LED and the reflecting mirror are arranged on the LED substrate so that the irradiation areas overlap. 4. A lighting apparatus comprising at least one pair of LED modules according to claim 3 , wherein each pair of LED modules is provided back to back so that the second open portions of the reflecting mirrors face in opposite directions.

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