JP2017147290A - Led unit and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED unit capable of radiating an ultraviolet ray and white light, and a lighting system.SOLUTION: An LED unit 6 provided in a lighting system 1 including a front cover 4 covering an emission opening 8 includes: an ultraviolet LED 10 emitting an ultraviolet ray; a white light LED 12 emitting white light; a first reflecting mirror 16 surrounding the ultraviolet LED 10; and a second reflecting mirror 18 surrounding the white light LED 12. The LED unit is provided with a gap filling member 26 that fills a gap between the front cover 4 and tip portions 16A, 18A of the respective first and second reflecting mirrors 16, 18.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an LED unit and a lighting device.

There is known an oil film detection device that irradiates an oil film with ultraviolet rays, excites and fluoresces molecules constituting the oil, and detects the oil film based on an image of the oil film (see, for example, Patent Document 1). The apparatus is used for the following applications, for example. That is, it is an application for detecting oil spilled on the sea surface, rivers, lakes and the like. In addition, for example, in a drainage pit provided in a power plant or substation, oil that may flow out to the outside (river or sea) is detected to prevent the outflow.
On the other hand, various lamps and lighting devices including light emitting diodes (hereinafter referred to as LEDs) are known (for example, see Patent Documents 2, 3, 4, and 5).

Japanese Patent Laid-Open No. 10-311771 JP 2004-103443 A JP 2011-40724 A Republished 2010-61913 JP2013-161909A

However, none of LED units and lighting devices using LEDs as light sources can irradiate ultraviolet light used for applications such as fluorescent oil film and white light used for applications such as photographing.
Then, an object of this invention is to provide the LED unit which can irradiate an ultraviolet-ray and white light, and an illuminating device.

  The present invention provides an LED unit provided in an illumination device including a cover that covers an output opening, an ultraviolet LED that emits ultraviolet light, a white light LED that emits white light, a first reflecting mirror that surrounds the ultraviolet LED, and And at least one of the second reflecting mirrors surrounding the white light LED, and filling a gap between at least one of the first reflecting mirror and the second reflecting mirror and the cover. Or a tip of at least one of the first reflecting mirror and the second reflecting mirror is in contact with the cover without a gap.

  Moreover, this invention has the mounting board | substrate which mounted the said ultraviolet LED and the said white light LED in the said LED unit, The said front-end | tip part is contacting the said cover directly or through the said gap filling member. Provided at the bottom of the first reflecting mirror and the second reflecting mirror is an interposition member that fills the gap between the mounting substrate, or the tip portion contacts the cover directly or via the gap filling member. The bottoms of the first reflecting mirror and the second reflecting mirror are in contact with the mounting substrate without any gap.

  Moreover, this invention is an illuminating device provided with the said cover which covers the output opening, and provided with said LED unit.

  Moreover, the present invention is characterized in that the gap filling member is provided on the cover in the lighting device.

  The present invention also provides an ultraviolet LED that emits ultraviolet light, a white light LED that emits white light, a first reflecting mirror that surrounds the ultraviolet LED, and an emission opening, the ultraviolet LED, the white light LED, and A cover that covers the first reflecting mirror, and in the surface of the cover, the ultraviolet LED and an ultraviolet non-reflecting portion that suppresses the back surface reflection of the ultraviolet light at a location where the ultraviolet light is incident from the first reflecting mirror. Is provided.

  According to the present invention, since the ultraviolet LED and the white light LED are provided, the ultraviolet light and the white light can be illuminated simultaneously or selectively.

It is a figure which shows typically the planar structure of the illuminating device which concerns on 1st Embodiment of this invention. It is sectional drawing cut | disconnected by the II sectional line of FIG. It is sectional drawing which shows the structure of the illuminating device which concerns on the modification of 1st Embodiment. It is sectional drawing which shows the structure of the illuminating device which concerns on 2nd Embodiment of this invention. It is a top view which shows the modification of the illuminating device which concerns on 1st and 2nd embodiment. It is a top view which shows the other modification of the illuminating device which concerns on 1st and 2nd embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram schematically illustrating a planar configuration of a lighting device 1 according to the present embodiment. 2 is a cross-sectional view taken along the line II of FIG.
The illuminating device 1 is an apparatus that uses an LED as a light source and radiates ultraviolet rays and white light simultaneously or selectively to illuminate the surroundings or an object. As illustrated in FIGS. 1 and 2, the lighting device 1 includes a case 2, a front cover 4, and an LED unit 6 housed in the case 2. Further, as shown in FIG. 1, the lighting device 1 includes various electric circuits such as a power supply circuit that supplies power to the LED unit 6, a lighting circuit that lights the LED unit 6, and a control circuit that controls the lighting. An electric circuit unit 5 and a human sensor 9 are provided. The human sensor 9 detects intrusion of a person in the ultraviolet irradiation range. The electric circuit unit 5 and the human sensor 9 may be disposed either inside or outside the case 2.

  The case 2 constitutes the casing of the lighting device 1 and is made of a material having excellent heat dissipation and high thermal conductivity and corrosion resistance suitable for outdoor use. On the front surface of the case 2, an emission opening 8 for emitting ultraviolet light and white light is formed. As shown in FIG. 2, a heat dissipation base 7 on which the LED unit 6 is placed is provided on the bottom surface 2 </ b> A of the case 2. The heat dissipating base 7 is a so-called heat sink that is formed of a highly heat conductive material such as aluminum and that transmits heat generated by the LED unit 6. A part of the heat transmitted to the heat radiating base 7 is transmitted to the case 2 and radiated from the case 2 to the outside, and a part is radiated to the atmosphere in the case 2.

  The front cover 4 is a so-called plate-like cover that closes the emission opening 8 and is also referred to as a front glove. The front cover 4 is made of a material such as quartz glass that transmits ultraviolet light and white light and has light resistance to ultraviolet light, for example.

The LED unit 6 is an LED light source capable of emitting ultraviolet light and white light.
That is, the LED unit 6 includes a plurality of ultraviolet LEDs 10, a plurality of white light LEDs 12, a mounting substrate 14 on which these LEDs are mounted, a plurality of first reflecting mirrors 16, and a plurality of second reflecting mirrors 18. ing.
The ultraviolet LED 10 is an LED that emits ultraviolet rays. The white light LED 12 is an LED that emits so-called white light.

Each of the ultraviolet LED 10 and the white light LED 12 is arranged on the mounting substrate 14 with the emission surfaces 10A and 12A facing the emission opening 8, and lighting is controlled by the electric circuit unit 5. By this lighting control, ultraviolet illumination by turning on the ultraviolet LED 10 and white light illumination by turning on the white light LED 12 are performed simultaneously or selectively.
In addition, at least during the lighting of the ultraviolet LEDs 10, the electric circuit unit 5 turns off all the ultraviolet LEDs 10 when intrusion of a person into the ultraviolet irradiation range is detected based on the detection signal of the human sensor 9. Thereby, for example, when the lighting device 1 is installed outdoors, even when a person unintentionally enters the ultraviolet irradiation range, the ultraviolet irradiation can be quickly stopped.

  Thus, this illuminating device 1 is equipped with ultraviolet LED10 and white light LED12, and can light each simultaneously or selectively. Thereby, for example, the illumination device 1 can be suitably used for such purposes as illuminating the object with ultraviolet light, brightening the periphery of the object by lighting white light, and photographing with the photographing camera.

The types and spectral characteristics of the ultraviolet LED 10 and the white light LED 12 and the color temperature of the white light LED 12 can be appropriately selected according to the use of illumination.
For example, the case where this illuminating device 1 is used for the apparatus for illumination of the oil film detection apparatus which detects the oil film of the water surface is demonstrated. In this case, the white light LED 12 includes a phosphor that fluoresces by blue light, and a blue emission spectrum (peak wavelength: 440 nm) that fluoresces the phosphor and an emission spectrum (peak wavelength: about 540 nm) of the phosphor are synthesized. An LED having a spectral distribution and a color temperature of 5700K is preferably used. Further, as the ultraviolet LED 10, an LED having a peak at 365 nm that is optimal for detecting the fluorescence wavelength of the excited oil is preferably used.

The mounting substrate 14 is a substrate on which the ultraviolet LED 10 and the white light LED 12 are mounted, and is mounted on the heat dissipation base 7. In the LED unit 6, all the ultraviolet LEDs 10 and the white light LEDs 12 are mounted on one mounting substrate 14. Specifically, as illustrated in FIG. 1, the ultraviolet light LEDs 10 and the white light LEDs 12 are alternately arranged adjacent to each other on the mounting substrate 14.
The ultraviolet LED 10 and the white light LED 12 may be appropriately mounted on the plurality of mounting boards 14.

The first reflecting mirror 16 has a shape surrounding the ultraviolet LED 10 and is an optical component that controls light distribution by reflecting the ultraviolet rays emitted from the ultraviolet LED 10. In this LED unit 6, a first reflecting mirror 16 is provided for each ultraviolet LED 10. More specifically, as shown in FIG. 2, the first reflecting mirror 16 has a rotating curved surface shape with an open front end portion 16 </ b> A, and a bottom portion 16 </ b> B is attached to the mounting substrate 14. An interposing member 22 is provided between the mounting substrate 14 and the bottom 16B of the first reflecting mirror 16, and the intervening member 22 fills a gap generated between the first reflecting mirror 16 and the mounting substrate 14. The interposition member 22 is made of any material that has UV resistance and shields UV light. Examples of this material include silicone rubber, polycarbonate (PC) resin materials, and ceramic materials such as alumina.
Then, as shown in FIG. 2, the ultraviolet LED 10 is disposed in each of the first reflecting mirrors 16, whereby the ultraviolet rays of the ultraviolet LED 10 leak into the case 2 from the bottom 16 </ b> B of the first reflecting mirror 16. Is prevented.

The second reflecting mirror 18 has a shape surrounding the white light LED 12, and is an optical element that controls light distribution by reflecting the white light emitted from the white light LED 12, and is provided for each white light LED 12. . Similarly to the first reflecting mirror 16, the second reflecting mirror 18 has a rotating curved surface shape with an open front end portion 18 </ b> A, and a bottom portion 18 </ b> B is attached to the mounting substrate 14. An interposition member 22 is provided between the mounting substrate 14 and the bottom portion 18B of the second reflecting mirror 18, and the intervening member 22 fills a gap generated between the second reflecting mirror 18 and the mounting substrate 14. The interposition member 22 is made of any material that has ultraviolet resistance and shields ultraviolet rays.
By arranging the white light LED 12 in each of the second reflecting mirrors 18, the light outside the second reflecting mirror 18 enters the inside from the bottom 18B, and the white light LED 12 is exposed to this light. Is prevented.

  As long as the shape of each reflective surface of the 1st reflective mirror 16 and the 2nd reflective mirror 18 is the shape which surrounds ultraviolet LED10 and white light LED12, the suitable shape according to desired light distribution is employ | adopted. . Examples of the shape include a curved surface shape such as a spherical shape, an ellipsoidal shape, and a parabolic shape, or a shape in which a plurality of plane reflecting surfaces are arranged around the ultraviolet LED 10 or the white light LED 12.

As shown in FIG. 2, each of the first reflecting mirror 16 and the second reflecting mirror 18 has tip portions 16 </ b> A and 18 </ b> A extending toward the front cover 4. In the LED unit 6, no gap is provided between the front end portions 16 </ b> A and 18 </ b> A and the front cover 4.
Specifically, a gap filling member 26 is provided between the front end portions 16 </ b> A and 18 </ b> A and the front cover 4. In this LED unit 6, these gap filling members 26 are attached to the edge portions of the front end portions 16 </ b> A and 18 </ b> A of the first reflecting mirror 16 and the second reflecting mirror 18 to fill the gap between the front cover 4. Yes, any material that has ultraviolet resistance and shields ultraviolet rays is used. For the gap filling member 26, for example, a silicon packing that can be attached to the front end portion 16A and 18A is preferably used.

As described above, the gaps are filled between the front end portions 16A and 18A of the first reflecting mirror 16 and the second reflecting mirror 18 and the front cover 4 so that the first reflecting mirror 16 is radiated from the front end portion 16A. Ultraviolet rays H <b> 1 (FIG. 2) are prevented from entering the inside through the front cover 4 from the tip end portion 18 </ b> A of the second reflecting mirror 18.
Thereby, the ultraviolet rays radiated from the first reflecting mirror 16 and the ultraviolet LED 10 inside thereof are emitted from the front cover 4 to the outside without leaking from the first reflecting mirror 16 inside the case 2 of the lighting device 1. Therefore, the white light LED 12 arranged side by side with the ultraviolet LED 10 is not exposed to the ultraviolet light leaking into the case 2, and the deterioration of the white light LED 12 due to the ultraviolet light is suppressed.

According to this embodiment described above, the following effects can be obtained.
In the illuminating device 1 of this embodiment, since the LED unit 6 includes the ultraviolet LED 10 and the white light LED 12 that emits white light, the ultraviolet light and the white light can be illuminated simultaneously or selectively.
In addition to this, the illumination device 1 includes a gap filling member 26 that fills the gap between the front end portions 16A and 18A of the first reflecting mirror 16 and the second reflecting mirror 18 and the front cover 4. Thereby, the ultraviolet ray H1 (FIG. 2) radiated from the tip portion 16A of the first reflecting mirror 16 is prevented from entering the inside from the tip portion 18A of the second reflecting mirror 18, and the deterioration of the white light LED 12 due to the ultraviolet rays is suppressed. It is done.

Moreover, in the LED unit 6 of this embodiment, it was set as the structure provided with the interposition member 22 which fills the clearance gap between the mounting substrate 14 in each bottom part 16B, 18B of the 1st reflective mirror 16 and the 2nd reflective mirror 18. FIG.
As a result, the ultraviolet light inside the first reflecting mirror 16 leaks from between the first reflecting mirror 16 and the mounting substrate 14, illuminating the surrounding white light LEDs 12 and degrading these white light LEDs 12. Nor.

[Modification of First Embodiment]
The lighting device 1 and the LED unit 6 of the first embodiment can be modified as follows.
FIG. 3 is a cross-sectional view showing the configuration of the illumination device 101 according to this modification. In addition, in the same figure, about the member demonstrated in the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
In the illuminating device 101, as shown in FIG. 3, the front end portions 116A and 118A of the first reflecting mirror 116 and the second reflecting mirror 118 included in the LED unit 106 extend until they directly contact the front cover 4, and these The tip portions 116A and 118A are in contact with the front cover 4 without a gap. Accordingly, it is possible to prevent ultraviolet rays from entering the second reflecting mirror 118 without providing the gap filling member 26 at the tip portions 116A and 118A of the first reflecting mirror 116 and the second reflecting mirror 118.

  In addition, in the illumination device 101, the first reflecting mirror 116 and the bottom portions 116B and 118B of the second reflecting mirror 118 are in direct contact with the mounting substrate 14 without a gap. Accordingly, without providing the interposition member 22 between the bottom portions 116B and 118B and the mounting board 14, leakage of ultraviolet rays from the gap between the first reflecting mirror 116 and the mounting board 14, and the gap between the mounting board 14 Is prevented from entering the inside of the second reflecting mirror 118.

  In the lighting device 1 and the lighting device 101 described above, only the front end portions 16A and 116A of the first reflecting mirrors 16 and 116, or only the front end portions 18A and 118A of the second reflecting mirrors 18 and 118, and the front cover 4 It is good also as a structure which eliminated the clearance gap between. For example, only the front end portions 16A and 116A of the first reflecting mirrors 16 and 116 are eliminated from the front cover 4, and leakage of ultraviolet rays from the front end portions 16A and 116A into the illumination devices 1 and 101 is prevented.

Further, in the lighting devices 1 and 101 described above, the interposition member 22 is provided in both the first reflecting mirrors 16 and 116 and the second reflecting mirrors 18 and 118, and the gap between the mounting substrate 14 is eliminated. However, the interposing member 22 may be provided on one of the first reflecting mirrors 16 and 116 and the second reflecting mirrors 18 and 118.
For example, in the configuration in which the gap between the front end portions 16A and 116A of the first reflecting mirrors 16 and 116 and the front cover 4 is eliminated, the interposition member 22 is provided only between the first reflecting mirrors 16 and 116 and the mounting substrate 14. May be provided. According to this configuration, leakage of ultraviolet rays into the illumination devices 1 and 101 is prevented at any of the distal end portions 16A and 116A of the first reflecting mirrors 16 and 116 and the proximal end portion on the mounting substrate 14 side. The white light LED 12 is prevented from being exposed to ultraviolet rays. In addition, since the second reflecting mirrors 18 and 118 of the white light LED 12 do not need to be provided with the interposing member 22, it is possible to design the reflecting surface to extend toward the mounting substrate 14 until it comes into contact with the mounting substrate 14. In addition, a decrease in white light reflection efficiency can be suppressed.

[Second Embodiment]
FIG. 4 is a cross-sectional view showing the configuration of the illumination device 201 according to the second embodiment of the present invention. In addition, in the same figure, about the member demonstrated in the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 4, the illumination device 201 according to the present embodiment includes a gap δ between the first reflecting mirror 216 and the front end portions 216 </ b> A and 218 </ b> A of the second reflecting mirror 218 and the front cover 4. Is provided, and this gap δ is not filled.
In this case, if no countermeasure is taken, if the back-surface reflected light Ha is generated when the ultraviolet light emitted from the front end portion of the first reflecting mirror 216 is incident on the front cover 4, the front end portion 218A of the second reflecting mirror 218 is generated. And the front cover 4, the back surface reflected light Ha enters the second reflecting mirror 218. As a result, the white light LED 12 is exposed to the ultraviolet back surface reflected light Ha and deteriorates.

Therefore, in the present embodiment, as shown in FIG. 4, a coating film 230 that suppresses the back surface reflection of ultraviolet rays is provided as an ultraviolet non-reflecting portion in the surface of the incident surface 4 </ b> A (surface facing the ultraviolet LED 10) of the front cover 4. It has been. The coating film 230 is provided on at least all of the incident surfaces 4 </ b> A of the front cover 4 where ultraviolet rays are incident from the ultraviolet LED 10 and the first reflecting mirror 216.
For the coating film 230, for example, an AR coating film (antireflection film) is preferably used.

  In the present embodiment, the coating film 230 that suppresses the back surface reflection of ultraviolet rays is provided in the plane of the incident surface 4A of the front cover 4, so that the back surface reflected light Ha of the ultraviolet rays is suppressed, and the back surface reflected light Ha Deterioration due to exposure of the white light LED 12 is prevented.

  In the second embodiment, the front cover 4 may have an antireflection structure (moth eye) instead of the coating film 230 in order to suppress the back surface reflected light Ha of ultraviolet rays.

  Each of the first embodiment, the second embodiment, and the modification described above is merely an example of one aspect of the present invention, and modifications and applications are possible within the scope of the gist of the present invention.

For example, the arrangement of the ultraviolet LED 10 and the white light LED 12 is not limited to the lattice shape, but is arbitrary.
For example, as shown in FIG. 5, it is also possible to configure an illuminating device 301 having an LED unit 306 in which ultraviolet LEDs 10 and white light LEDs 12 are alternately arranged in an annular shape. In this case, the case 302, the front cover 304, and the mounting substrate 314 of the lighting device 301 can be circular in plan view according to the annular arrangement of the ultraviolet LED 10 and the white light LED 12.
Furthermore, as shown in FIG. 6, an LED unit 406 in which a through-hole portion 440 is provided at a substantially central portion of the case 402, the front cover 404, and the mounting substrate 414 in accordance with the annular arrangement of the ultraviolet LED 10 and the white light LED 12. And the illuminating device 401 provided with the said LED unit 406 can also be comprised.

  Further, for example, the first reflecting mirrors 16, 116, and 216 may be provided for each of the plurality of ultraviolet LEDs 10 instead of being provided for each ultraviolet LED 10. Similarly, the second reflecting mirrors 18, 118, and 218 may be provided for each of the plurality of white light LEDs 12 instead of being provided for each of the white light LEDs 12.

  The illuminating devices 1, 101, 201, 301, and 401 described above are most suitable as an ultraviolet light source and a white light source in a technique for illuminating an oil film by irradiating ultraviolet rays and photographing and observing it. In such a technique, conventionally, a black light which is a discharge lamp is used. Compared to the case where such a black light is used, according to the lighting devices 1, 101, 201, 301, 401, a device with low power consumption and low heat generation can be realized.

1, 101, 201, 301, 401 Lighting device 2 Case 4 Front cover (cover)
6, 106, 206, 306, 406 LED unit 8 Outgoing aperture 9 Human sensor 10 UV LED
12 White light LED
DESCRIPTION OF SYMBOLS 14 Mounting board 16 1st reflective mirror 16A The front-end | tip part of a 1st reflective mirror 16B The bottom part of a 1st reflective mirror 18A The front-end | tip part of a 2nd reflective mirror 18B The bottom part of a 2nd reflective mirror 22 Intervening member 26 Gap filling member 230 Coating film (ultraviolet ray) Non-reflective part)
Ha Back side reflected light

Claims (5)

In the LED unit provided in the lighting device provided with the cover that covers the emission opening,
An ultraviolet LED that emits ultraviolet rays;
A white light LED that emits white light;
A first reflecting mirror surrounding the ultraviolet LED, and at least one of a second reflecting mirror surrounding the white light LED,
A gap filling member that fills a gap between at least one of the first reflecting mirror and the second reflecting mirror and the cover; or at least one of the first reflecting mirror and the second reflecting mirror Any one of the tip portions is in contact with the cover without a gap. A mounting substrate on which the ultraviolet LED and the white light LED are mounted;
An interposition member that fills a gap between the first reflecting mirror and the mounting board at the bottom of the first reflecting mirror and the bottom of the second reflecting mirror, the tip of which is in contact with the cover directly or via the gap filling member. Or the bottom of the first reflecting mirror and the second reflecting mirror, which are in contact with the cover directly or via the gap filling member, are in contact with the mounting substrate without any gap. ,
The LED unit according to claim 1. The cover covering the exit opening;
An illumination device comprising the LED unit according to claim 1.   The lighting device according to claim 3, wherein the gap filling member is provided on the cover. An ultraviolet LED that emits ultraviolet rays;
A white light LED that emits white light;
A first reflecting mirror surrounding the ultraviolet LED;
A cover that is provided at an emission opening and covers the ultraviolet LED, the white light LED, and the first reflecting mirror;
In the surface of the cover, an ultraviolet non-reflecting portion that suppresses the back surface reflection of the ultraviolet ray is provided at a location where the ultraviolet ray is incident from the ultraviolet LED and the first reflecting mirror.

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