JP7179921B1 - lighting equipment - Google Patents

Abstract

Kind Code: A1 A lighting device is provided which can ensure a constant brightness over a wide range in the axial direction of a tunnel and can improve visibility due to phosphorescence of a phosphorescent body. The lighting device is a straight tube type lighting device that is installed on the installation surface of the culvert and irradiates light on the side opposite to the installation surface, and is a translucent cylindrical protective body having translucency. , a light source unit arranged inside the protector, and a support for supporting the light source unit with respect to the protector. The light source unit includes two LED substrates on which LED elements are arranged along the tube axis direction and arranged so that non-mounted surfaces of the LED elements face each other; and a luminous body arranged to protrude. [Selection drawing] Fig. 4

Description

The present invention relates to an illumination device, and more particularly to an illumination device using an LED (Light Emitting Diode) as a light source.

In recent years, LED lighting devices have been used as light sources in order to achieve energy saving and long life in lighting devices that are installed in poor temperature environments such as tunnels in urban areas and urban areas (for example, Patent Document 1. , 2). In general, when lighting devices are installed in a tunnel, installation intervals and the like are set with reference to the optical characteristics of the lighting devices.

The optical characteristics of a straight tube lighting device having a tube axis (lamp axis) are the light distribution characteristics in the AA plane perpendicular to the tube axis (hereinafter referred to as "AA light distribution characteristics"), the tube axis Light distribution characteristics in the BB plane including (hereinafter referred to as "BB light distribution characteristics"), and light distribution in the CC plane inclined 45 ° with respect to the AA plane and the BB plane characteristic (hereinafter referred to as "CC light distribution characteristic"). In a lighting device having an LED light source, the direction in which the LED elements are arranged is the tube axis.

FIG. 1 is a diagram showing an example of light distribution characteristics of a straight tube lighting device. When the lighting device is installed on the ceiling, the optical axis faces vertically downward. As shown in FIG. 1, in general, the luminous intensity decreases as the irradiation direction deviates from the vertical direction (0°). In addition, compared to the BB light distribution characteristic and the CC light distribution characteristic, the AA light distribution characteristic has a smaller decrease in luminous intensity depending on the irradiation direction, and has a predetermined luminous intensity (for example, 50% of the luminous intensity in the optical axis direction). %) is large. Therefore, when a plurality of lighting devices having the light distribution characteristics shown in FIG. The illumination device is installed so that the AA light distribution characteristic with a large light distribution angle is applied to the tunnel axis direction (see FIG. 2).

In the lighting devices disclosed in Patent Documents 1 and 2, two LED substrates on which LED elements are mounted are arranged so that their optical axes intersect with each other. In comparison, the light distribution angle in the AA light distribution characteristic is large. Therefore, it is useful when it is desired to efficiently ensure a predetermined brightness along the axial direction of the sinus.

In addition, Patent Document 3 discloses a lighting device that includes a phosphorescent body that emits light during a power failure or when the power is turned off, and that also functions as an evacuation guide light. Specifically, in Patent Document 3, a phosphorescent body is arranged on a part of the protective tube or on the LED substrate outside the beam flux area of the LED light source.

JP 2013-51193 A JP 2012-43558 A JP 2013-218828 A

However, as in Patent Documents 1 and 2, the technology disclosed in Patent Document 3 is applied to a type of lighting device in which LED light is irradiated on both sides of the tube axis, and a part of the protective tube and the LED substrate When a phosphorescent body is placed on top, the arrangement area of the phosphorescent body is limited, so it is difficult to increase the light emitting area of the phosphorescent body, and there is a risk that sufficient visibility may not be obtained due to the phosphorescence from the phosphorescent body. be.

SUMMARY OF THE INVENTION An object of the present invention is to provide an illuminating device capable of increasing the illuminance over a wide range in the sinusoidal axial direction and improving the visibility due to the phosphorescence of the phosphorescent material.

A lighting device according to the present invention includes:
A straight tube lighting device installed on an installation surface of a culvert and irradiating light on the side opposite to the installation surface,
a translucent cylindrical protective body having translucency;
a light source unit arranged inside the protector;
a support that supports the light source unit with respect to the protector;
The light source unit
two LED substrates on which LED elements are arranged along the direction of the tube axis and are arranged so that non-mounting surfaces of the LED elements face each other;
and a phosphorescent body disposed between the two LED substrates so as to protrude beyond the end portions of the LED substrates.

According to the present invention, the illuminance can be increased over a wide range in the direction of the tunnel axis, and the visibility of the phosphorescence of the phosphorescent body can be improved.

FIG. 1 is a diagram showing an example of light distribution characteristics of a straight tube lighting device. FIG. 2 is a diagram showing an example of an installation mode of the lighting device in the sinus. 3A and 3B are diagrams showing the appearance of the lighting device according to the first embodiment. FIG. 4 is a cross-sectional view showing the internal structure of the lighting device according to the first embodiment. FIG. 5 is a cross-sectional view showing the internal structure of the lighting device according to the first embodiment. 6A and 6B are explanatory diagrams of the board mounting angle of the lighting device. FIG. 7 is a diagram showing the light distribution characteristics of the lighting device. FIG. 8 is a cross-sectional view showing the internal structure of the lighting device according to the second embodiment. FIG. 9 is a cross-sectional view showing the internal structure of the lighting device according to the third embodiment. FIG. 10 is a cross-sectional view showing the internal structure of the lighting device according to the third embodiment. 11A to 11F are diagrams showing modifications of the phosphorescent body.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
3A and 3B are diagrams showing the appearance of the lighting device 1 according to the first embodiment. FIG. 3A is a front view of the lighting device 1 and shows a state in which it is attached to the installation surface C. FIG. FIG. 3B is a plan view of the illumination device 1 viewed from the installation surface C side. 4 and 5 are cross-sectional views showing the internal structure of the lighting device 1. FIG. 4 schematically shows a cross section perpendicular to the tube axis of the lighting device 1, and FIG. 5 schematically shows a longitudinal section parallel to the tube axis of the lighting device 1. As shown in FIG.

The lighting device 1 is installed, for example, on an installation surface C of a culvert such as a tunnel or a tunnel, and irradiates light on the side opposite to the installation surface C. As shown in FIG. The irradiation device 1 is installed, for example, on the ceiling of a tunnel extending in the horizontal direction, and irradiates light downward on the side opposite to the installation surface C. As shown in FIG. The lighting device 1 is, for example, a waterproof lighting device and complies with JIS C 0920 IPX7.

The lighting device 1 includes a light source unit LU, a power supply unit PU, a protector 30, and the like. The light source unit LU and the power supply unit PU are housed inside the protector 30 . The LED boards 10A and 10B of the light source unit LU and the power supply circuit board 21 of the power supply unit PU are electrically connected, and power is supplied from the power supply unit PU to the light source unit LU. Power supply unit PU is connected to power cable 41 inside protective body 30 and is supplied with power from an external power supply via power cable 41 .

The protector 30 has a protective tube 31 , holding cases 32 and 33 and sealing caps 34 and 35 arranged at both ends of the protective tube 31 .

The protection tube 31 is, for example, a translucent cylindrical member, and is formed of a translucent material such as glass or resin. Polycarbonate resin, for example, can be applied to the molding material of the protective tube 31 . Both ends of the protective tube 31 are closed by holding cases 32 and 33 and sealing caps 34 and 35 . Translucent protective tube 31 transmits part of the light emitted from LED elements 13A and 13B and reflects the rest.

The holding cases 32 and 33 have a cylindrical shape and are made of a resin material such as ABS resin. Similarly, the sealing caps 34 and 35 have a bowl shape and are made of a resin material such as ABS resin. The holding cases 32, 33 and the sealing caps 34, 35 are preferably made of a thermally conductive material.

The holding cases 32 and 33 are, for example, fitted to both ends of the protective tube 31 and fixed to the protective tube 31 by tightening tightening rings 36 and 37 from the center in the axial direction. A sealing member (not shown) such as an O-ring is arranged between the holding cases 32, 33 and the tightening rings 36, 37 to ensure watertightness.

Suspension arms 32a and 33a are provided on part of the outer peripheries of the holding cases 32 and 33 so as to protrude outward. The suspending arms 32a and 33a are fastened to a fixing piece 51a of a flat chassis 51 with fastening members (reference numerals omitted) such as screws, for example. When the chassis 51 is fixed to the installation surface C of the ceiling of the tunnel, the lighting device 1 is suspended from the ceiling via the suspension arms 32a and 33a.

The sealing caps 34, 35 are fastened to the holding cases 32, 33, for example. A sealing member (not shown) such as an O-ring is arranged between the sealing caps 34, 35 and the holding cases 32, 33 to ensure watertightness. One of the sealing caps 34 is provided with a cable insertion portion 42 into which a power cable 41 is drawn. The power cable 41 is pulled into the protection tube 31 via the cable insertion portion 42 and connected to the power supply unit PU.

Heat dissipation plates 38 and 39 are fitted inside the holding cases 32 and 33 . Specifically, the heat radiation plates 38 and 39 are fastened by screws to mounting pieces 32c and 33c integrally provided on the holding cases 32 and 33, and the heat radiation plates 38 and 39 and the holding case are connected from the power supply circuit board 21 to each other. Heat is dissipated via 32 and 33. The radiation plates 38 and 39 have a disk shape and are made of a material having thermal conductivity such as anodized aluminum. The shape of the radiation plates 38 and 39 is not limited to the disc shape, and may be any shape such as a rectangle or an ellipse as long as it can be fastened to the mounting pieces 32c and 33c.

The power supply unit PU has a power supply circuit board 21 and a power supply module 22 mounted on the power supply circuit board 21 . The power circuit board 21 is electrically connected to the power cable 41 and the LED boards 10A and 10B. The power supply module 22 may be any module as long as it can supply power to the LED elements 13A and 13B mounted on the LED boards 10A and 10B, and is composed of, for example, a DC power supply circuit.

The power supply unit PU is held in a predetermined posture by bonding the power supply circuit board 21 to the radiation plates 38 and 39 . The power supply unit PU is held, for example, in a posture in which the power supply circuit board 21 and the chassis 51 are parallel. That is, when the lighting device 1 is installed on the installation surface C, the power supply circuit board 21 is parallel to the installation surface C. As shown in FIG. The power supply circuit board 21 and the heat dissipation plates 38 and 39 are joined via a joining means or a joining member capable of conducting heat, such as welding or fastening with screws.

The light source unit LU has two LED boards 10A and 10B. The LED boards 10A and 10B are printed wiring boards on which power supply lines and the like to the LED elements 13A and 13B are formed. The LED boards 10A and 10B are long boards having a substantially L-shaped cross section, and are divided into LED mounting board sections 11A and 11B and fixed board sections 12A and 12B at the bent portions. An angle formed by the LED mounting board portions 11A, 11B and the fixed board portions 12A, 12B is referred to as a "board mounting angle θs" (see FIG. 6B). The board mounting angle θs is an obtuse angle. The LED boards 10A and 10B are arranged so as to extend along the axial direction of the lighting device 1 . When the angle between the optical axes 14A and 14B of the LED elements 13A and 13B and the vertical direction is θ, the board mounting angle θs is expressed by (180°−θ).

The fixed board portions 12A and 12B are fixed to the power supply circuit board 21 with spacers 23 interposed therebetween. The LED boards 10A and 10B are held in a posture in which the fixed board portions 12A and 12B are parallel to the power circuit board 21 . In other words, in the present embodiment, the power supply circuit board 21 functions as a support for supporting the light source unit LU with respect to the protector 30 .

The light source unit LU is held in a suspended state on the power circuit board 21 . A space is formed between the power circuit board 21 and the LED boards 10A and 10B (fixed board portions 12A and 12B). As a result, the heat generated when the LED elements 13A and 13B are driven is efficiently radiated.

The fixed substrate portions 12A and 12B may function as reflectors that reflect the light emitted from the LED elements 13A and 13B. For example, by forming the fixed substrate portions 12A and 12B from a metal material such as aluminum, they can function as reflectors. Further, for example, a reflective layer made of a metal material such as aluminum may be formed on the surfaces of the fixed substrate portions 12A and 12B made of resin.

A plurality of LED elements 13A and 13B are linearly arranged on the LED mounting substrate portions 11A and 11B, respectively. The direction in which the LED elements 13A and 13B are arranged coincides with the tube axis of the lighting device 1 . The LED elements 13A and 13B may be arranged in a line, or may be two-dimensionally arranged in a plurality of lines.

The optical axis directions of the plurality of LED elements 13A and 13B mounted on each of the LED mounting substrate portions 11A and 11B are the same, and are typically perpendicular to the LED mounting surface. The LED mounting substrates 11A and 11B are mounted so that the respective LED mounting surfaces face opposite sides with respect to a longitudinal section along the tube axis of the lighting device 1, that is, the LED elements are mounted on the LED mounting substrates 11A and 11B. Positioned so that 13A, 13B irradiate different areas. It can also be said that the LED mounting substrate portions 11A and 11B are arranged so that the non-mounting surfaces of the LED elements 13A and 13B face each other.

Moreover, the LED mounting board portions 11A and 11B are arranged to be inclined with respect to the fixed board portions 12A and 12B. Specifically, the LED mounting board portions 11A and 11B are inclined in a direction in which the open ends on the side opposite to the power circuit board 21 side (fixed board portion 12A and 12B side) approach each other. Since the fixed board portions 12A and 12B are fixed in parallel with the power supply circuit board 21 and thus the chassis 51, it can be said that the LED mounting board portions 11A and 11B are arranged so as to be inclined with respect to the installation surface C. . It can also be said that the optical axes of the LED elements 13A and 13B intersect each other in a cross section perpendicular to the tube axis of the lighting device 1 . The LED boards 10A and 10B are provided symmetrically with respect to a longitudinal section along the tube axis of the lighting device 1, for example.

Since the optical axis directions of the LED elements 13A and 13B are inclined with respect to the vertical direction and the horizontal direction, the AA light distribution characteristic of the illumination device 1 provides a predetermined luminous intensity over a wide range (see FIG. 7). ). Therefore, by installing the lighting device 1 on the ceiling of the sinus channel so that the tube axis is orthogonal to the sinus channel axis direction, that is, AA light distribution is applied to the sinus channel axis direction, A wide area can be irradiated in the axial direction of the sinus. When a plurality of lighting devices 1 are installed at predetermined intervals in the axial direction of the tunnel, the number of lighting devices 1 can be reduced, and facility construction costs can be reduced. In addition, sufficient brightness can be ensured even at a point distant from the lighting device 1 (for example, the intermediate point P1).

In particular, when two adjacent lighting devices 1 are installed so that their optical axis directions intersect near the midpoint P1, the distance L between the lighting devices 1 can be maximized. For example, when the board mounting angle θs of the LED boards 10A and 10B is 105°, that is, the angle θ between the optical axis direction and the vertical direction is 75°, and the installation height H of the lighting device 1 is 2.1 [m]. , the lighting device 1 should be installed with a midpoint P1 at a horizontal distance of about 8 [m] (=2.1×tan75°) from the lighting device 1 .

In addition, since the emitted light from the LED elements 13A and 13B is reflected and scattered by the fixed substrate portions 12A and 12B, the AA light distribution characteristic is improved (see FIG. 7), and the point ( For example, it is possible to ensure sufficient brightness even at the point P0) directly below the lighting device 1 .

Furthermore, the light source unit LU has a phosphorescent body 71 that emits light even when the LED elements 13A and 13B are not emitting light, such as when there is a power failure or when the power is turned off. The phosphorescent body 71 mainly absorbs reflected light emitted from the LED elements 13A and 13B and reflected by the protective tube 31, and accumulates the light as energy.

The luminous body 71 is arranged between the two LED boards 10A and 10B, more specifically between the LED mounting boards 11A and 11B so as to protrude from the open ends of the LED mounting boards 11A and 11B. That is, the phosphorescent body 71 is arranged on the LED non-mounting surface side of the LED substrates 10A and 10B. Therefore, the emitted light from the LED elements 13A and 13B is not blocked by the phosphorescent body 71. FIG.

The luminous body 71 has a flat plate shape and has a length equivalent to that of the LED substrates 10A and 10B in the tube axis direction. Further, the phosphorescent body 71 extends along the tube axis direction, and is arranged such that the main surface of the flat plate shape faces the irradiation side of the LED elements 13A and 13B.

The luminous body 71 is composed of, for example, a molded product made of a luminous material. In this case, the stored light energy can be easily increased simply by increasing the volume of the light storing body 71 . Therefore, compared to a luminous body in which a luminous sheet is affixed to the surface of a base material or a luminous paint is applied, the luminous duration can be increased, and the phosphorescence luminance is increased, thereby improving the visibility. As the phosphorescent material, for example, a known phosphorescent material such as strontium aluminate can be applied.

In the present embodiment, a reinforcing plate 72 is provided between the LED boards 10A and 10B to maintain the posture of the LED mounting board portions 11A and 11B. there is The reinforcing plate 72 connects, for example, the LED mounting board portions 11A and 11B over the entire tube axial direction. Using the reinforcing plate 72, the phosphorescent body 71 can be easily assembled to the light source unit LU. Note that the mounting form of the phosphorescent body 71 is not particularly limited as long as it is arranged in a region that does not interfere with the light emitted from the LED elements 13A and 13B.

As described above, the lighting device 1 according to the first embodiment is a lighting device that is installed on the installation surface C of the culvert and irradiates light on the side opposite to the installation surface C, and is a semi-translucent lighting device. It includes a transparent tubular protective body 30 , a light source unit LU arranged inside the protective body 30 , and a power supply circuit board 21 (supporting body) that supports the light source unit LU with respect to the protective body 30 . The light source unit LU includes two LED substrates 10A and 10B on which the LED elements 13A and 13B are arranged along the tube axis direction and arranged so that the non-mounting surfaces of the LED elements 13A and 13B face each other. Between 10A and 10B, there is provided a phosphorescent body 71 that protrudes from the open ends of the LED mounting board portions 11A and 11B (the ends of the LED boards).

According to the lighting device 1, it is possible to irradiate LED light on both sides of the tube axis, and to store light in the phosphor 71 without hindering the irradiation of the LED light. Therefore, by installing the illuminating device 1 so that the tube axis is perpendicular to the axial direction of the sinus tract, it is possible to increase the illuminance over a wide range in the axial direction of the sinus tract. In addition, since light can be stored efficiently in the phosphorescent body 71 and the visibility of the phosphorescence of the phosphorescent body 71 can be improved, it is also suitable as a good visible sign when the light is turned off.

In the lighting device 1, the phosphorescent body 71 has a flat plate shape, extends in the tube axis direction, and is arranged so that the main surface of the flat plate shape faces the irradiation side of the LED elements 13A and 13B. ing. Thereby, the reflected light reflected by the protective tube 13 can be efficiently received and stored.

In addition, in the illumination device 1, the phosphorescent body 71 is formed of a molded product made of a phosphorescent material. This makes it possible to easily increase the luminous energy of the luminous body 71, lengthen the duration of light emission, and obtain high phosphorescence intensity.

The illumination device 1 further includes a reinforcing plate 72 arranged between the two LED boards 10A and 10B, and the phosphorescent body 71 is attached to the reinforcing plate 72. As shown in FIG. As a result, the luminous body 71 can be arranged at an appropriate position by using the reinforcing plate 72 for maintaining the attitude of the LED boards 10A and 10B.

[Second embodiment]
FIG. 8 is a cross-sectional view showing the internal structure of the lighting device 2 according to the second embodiment.
The illumination device 2 according to the present embodiment has the following features in addition to the features of the illumination device 1 according to the first embodiment.

That is, in the lighting device 2, the reflectors 61 are attached to the fixed substrate portions 12A and 12B of the LED substrates 10A and 10B, respectively, separately from the LED substrates 10A and 10B. As a result, the shape of the reflector 61 can be designed relatively freely, so that the AA light distribution characteristics of the illumination device 2 can be easily improved.

In addition, in the present embodiment, the reflector 61 has a V-shape that protrudes toward the irradiation side in a longitudinal section along the axial direction. As a result, the emitted light from the LED elements 13A and 13B is scattered so as to spread in the tube axis direction of the illumination device 2, so that the BB light distribution characteristic is improved, Sufficient brightness can be ensured even in the width direction of the sinus that is perpendicular to the direction of the road axis.

Note that when the reflector 61 configured separately from the LED substrates 10A and 10B is provided as in the present embodiment, the fixed substrate portions 12A and 12B of the LED substrates 10A and 10B necessarily function as reflectors. No need. Further, the shape of the reflector 61 may be set so that the amount of light incident on the phosphor 71 is increased.

[Third Embodiment]
FIG. 9 is a cross-sectional view showing the internal structure of the illumination device 3 according to the third embodiment. FIG. 10 is a cross-sectional view showing the internal structure of the lighting device 3. As shown in FIG.
The illumination device 3 according to the present embodiment has the following features in addition to the features of the illumination device 1 according to the first embodiment.

That is, in the lighting device 3, a radiator plate 24 is attached to the power supply circuit board 21 via a spacer 23, and fixed substrate portions 12A and 12B of the LED substrates 10A and 10B are fixed to the radiator plate 24. FIG. The radiator plate 24 is joined to the radiator plates 38 and 39 instead of the power circuit board 21, and functions as a support for supporting the light source unit LU.
The radiator plate 24 is made of a metallic material having thermal conductivity, such as aluminum.

In this case, the heat generated when the LED elements 13A and 13B are driven is transferred as a heat flow to the radiator plate 24 and efficiently radiated to the outside via the radiator plates 38 and 39 and the holding cases 32 and 33. Therefore, since restrictions due to heat generated by the LED elements 13A and 13B during driving are alleviated, it is possible to increase the number of LED elements to be mounted and increase the driving power, making it easier to design the illumination device 3 with high brightness. In addition, as the illumination device 3 is designed to have a high luminance, the amount of light incident on the phosphorescent body 71 increases and the duration of phosphorescence increases, so that it is suitable as an evacuation guide light.

Although the invention made by the inventor of the present invention has been specifically described above based on the embodiments, the present invention is not limited to the above embodiments, and can be changed without departing from the scope of the invention.

For example, as the luminous body 71, a luminous sheet containing a luminous material or a luminous paint may be applied to the surface of a base material made of resin or metal.
Moreover, the phosphorescent body 71 may be arranged between the LED boards 10A and 10B so as to protrude from the end portions of the LED boards 10A and 10B. not limited to For example, as the shape of the luminous body 71, shapes shown in FIGS. 11A to 11F are conceivable.
Further, in addition to the luminous body 71, the holding cases 32, 33 and/or the sealing caps 34, 35 may have a luminous property.

Further, for example, in the embodiment, the illumination devices 1 to 3 are installed on the ceiling of the tunnel, but the illumination devices 1 to 3 may be installed on the side wall of the tunnel. Moreover, in the sinus passage extending in the vertical direction, they may be installed at predetermined intervals in the vertical direction.

Also, the board mounting angles θs of the two LED boards 10A and 10B may be the same or different. Further, the board mounting angle θs may be made variable by connecting the LED mounting board sections 11A, 11B and the fixed board sections 12A, 12B via a hinge structure. In this case, since the irradiation range of the lighting device in the axial direction of the tunnel becomes variable, the required brightness can be easily secured by adjusting the board mounting angle θs according to the number of lighting devices that can be installed, etc. be able to. Also, the irradiation range can be changed after the lighting device is installed.
Also, the LED mounting board portions 11A and 11B may be provided perpendicularly (θs=90°) to the fixed board portions 12A and 12B.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims.

1 to 3 lighting device 10A, 10B LED substrate 11A, 11B LED mounting substrate portion 12A, 12B fixed substrate portion 13A, 13B LED element 21 power supply circuit substrate (support)
22 power supply module 30 protective body 31 protective tube 71 phosphorescent body 72 reinforcing plate LU light source unit PU power supply unit

Claims (5)

A straight tube lighting device installed on an installation surface of a culvert and irradiating light on the side opposite to the installation surface,
a translucent cylindrical protective body having translucency;
a light source unit arranged inside the protector;
a support that supports the light source unit with respect to the protector;
The light source unit
two LED substrates on which LED elements are arranged along the direction of the tube axis and are arranged so that non-mounting surfaces of the LED elements face each other;
a luminous body disposed between the two LED substrates so as to protrude beyond the end of the LED substrate;
lighting device. The luminous body has a flat plate shape, extends in the tube axis direction, and is arranged so that the main surface of the flat plate shape faces the irradiation side of the LED element.
The lighting device according to claim 1 . The phosphorescent body is a molded article made of a phosphorescent material,
3. A lighting device according to claim 1 or 2. further comprising a reinforcing plate disposed between the two LED substrates;
The phosphorescent body is attached to the reinforcing plate,
4. A lighting device according to any one of claims 1 to 3. The support is a heat sink,
5. A lighting device according to any one of claims 1 to 4.

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