JP2022169360A - Luminaire - Google Patents

Abstract

To provide a luminaire capable of suppressing loss of light from a light source.SOLUTION: A luminaire comprises a plurality of light sources 10a, 10b and 10c, a light source substrate 6 on which the light sources 10a, 10b and 10c are mounted, a lens part 12 which covers the light sources 10a, 10b and 10c, and a diffusion cover which covers the light sources 10a, 10b and 10c, and the lens part 12. The plurality of light sources 10a, 10b and 10c are provided in a spiral or vortex shape. The plurality of light sources 10a, 10b and 10c are provided clockwise or counterclockwise. The plurality of light sources 10a, 10b and 10c may be provided in a double or more multiple-spiral shape or a double or more multiple-vortex shape.SELECTED DRAWING: Figure 2A

Description

The present invention relates to lighting devices.

2. Description of the Related Art Conventionally, illumination devices using LEDs have been widely used.
A lighting device using LEDs illuminates by arranging a large number of point light source LEDs. Therefore, the user visually sees color unevenness and brightness unevenness of the cover portion that covers the point light source LED.

Japanese Patent Laid-Open No. 2002-200000 describes that by reducing the pitch of light emitting elements of different colors, it is possible to reduce color unevenness and brightness unevenness of the cover portion.
Patent Document 2 describes that when a plurality of systems of LEDs are arranged on a circle with a narrow pitch, the wiring pattern becomes complicated and a jumper element is required.

Japanese Patent Application Laid-Open No. 2012-252899 JP 2018-37177 A (FIG. 8 etc.)

FIG. 14 shows a cross-sectional view of a connecting portion 106 between lenses 102 covering LEDs 101 when using a conventional jumper element 103 (Patent Document 2).
When a jumper element is used as in Patent Document 2, a convex portion 106t is required on the lens 102 covering the jumper element 103 at the connecting portion 106 between the lens 102 covering the LED 101 and the lens 102 covering the adjacent LED 101. Become.
As the height of the convex shape of the connecting portion 106 increases, the light h100 emitted from the lens 102 becomes stray light h101 on the convex portion 106t, increasing the optical loss.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device capable of suppressing loss of light from a light source.

In order to solve the above-described problems, an illumination device of the present invention includes a plurality of light sources, a light source substrate on which the light sources are mounted, a lens section that covers the light sources, and a diffusion cover that covers the light sources and the lens section. , wherein the plurality of light sources are spirally or spirally provided.

ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can suppress the loss of the light from a light source can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The side view of the LED lighting apparatus of Embodiment 1 which concerns on this invention. 1 is an exploded perspective view of an LED lighting device according to Embodiment 1 of the present invention; FIG. FIG. 1C is a view of the light source substrate viewed from below in the direction of arrow I in FIG. 1B. FIG. 2B is an enlarged view of part II of FIG. 2A. FIG. 2A is an enlarged cross-sectional view of IV-IV. FIG. 1B is a view corresponding to the direction of arrow I in FIG. 1A when the light source substrate of the comparative example is viewed from below. FIG. 3B is an enlarged view of part III in FIG. 3A of a comparative example. 3 is a bottom view of the light source substrate of Embodiment 1, in which three systems of LEDs spirally or spirally mounted in the same row on the light source substrate are represented by thick solid lines; FIG. FIG. 10 is a bottom view of the light source substrate of the LED lighting device of Embodiment 2 as viewed from below; The bottom view which looked at the light source board|substrate of the LED lighting apparatus of a modification from the downward direction. A bottom view of the light source substrate of the modified example, in which the first LED row and the second LED row of the three systems of LEDs mounted in the same row in a double spiral or double spiral shape are represented by thick solid lines. . FIG. 10 is a bottom view of the light source substrate of the LED lighting device of Modification 1 as viewed from below; FIG. 11 is a bottom view of the light source substrate of the LED lighting device of Modification 2 as viewed from below; FIG. 11 is a bottom view of the light source substrate of the LED lighting device of Modification 3 as viewed from below; FIG. 12 is a bottom view of the light source substrate of the LED lighting device of Modification 4 as viewed from below; FIG. 12 is a bottom view of the light source substrate of the LED lighting device of Modification 5 as viewed from below; FIG. 12 is a bottom view of the light source substrate of the LED lighting device of Modification 6 as viewed from below; FIG. 4 is a cross-sectional view of a connection between lenses covering LEDs when using a conventional jumper element;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
<<Embodiment 1>>
FIG. 1A shows a side view of an LED lighting device 1 of Embodiment 1 according to the present invention. FIG. 1B shows an exploded perspective view of the LED lighting device 1 of Embodiment 1. As shown in FIG.
The LED lighting device 1 of Embodiment 1 includes an adapter 9 , a backbone 2 , an insulating plate 3 , a power supply board 4 , a heat sink 5 , a light source board 6 , a lens cover 7 and a shade 8 . A wiring component 11 for supplying power to the LED lighting device 1 is provided on the indoor ceiling T (see FIG. 1A).

FIG. 2A shows a view of the light source substrate 6 viewed from below in the direction of arrow I in FIG. 2B. FIG. 2B shows an enlarged view of part II of FIG. 2A. FIG. 2C shows an enlarged sectional view taken along line IV-IV of FIG. 2A.
LEDs 10a, 10b, and 10c, which are light sources, are mounted on the light source substrate 6 of the LED lighting device 1. As shown in FIG.

The power supply board 4 shown in FIG. 1B supplies current to drive the LEDs 10a, 10b, and 10c.
The adapter 9 supplies the power supply board 4 with the power supply voltage from the wiring component 11 of the ceiling T (see FIG. 1A).
The backbone 2 is a base member of a structural member that attaches the LED lighting device 1 to the ceiling T. As shown in FIG.

The insulating plate 3 shown in FIG. 1B insulates the lower power substrate 4 and the backbone 2 .
The radiator plate 5 is, for example, an iron plate, and radiates heat from the LEDs 10a, 10b, and 10c mounted on the light source substrate 6 arranged below.
A lens cover 7 below the light source board 6 insulates the light source board 6 on which the LEDs 10a, 10b, and 10c are mounted, and diffuses the light from the LEDs 10a, 10b, and 10c.
The shade 8 diffuses the light from the LEDs 10a, 10b, and 10c, and is visible to the user, so it has design.

As shown in FIG. 2A, the light source board 6 has a board 6a, three systems of LEDs 10a, 10b, 10c, wiring patterns 10ah, 10bh, 10ch, and a connector 6k.
Three systems of LEDs 10a, 10b, and 10c are arranged in the same row in a spiral or spiral shape on the substrate 6a.
As shown in FIG. 2C, lenses 12 for diffusing the light from the LEDs 10a, 10b, 10c are formed on the three systems of LEDs 10a, 10b, 10c and their respective wiring patterns 10ah, 10bh, 10ch.

The substrate 6a is made of, for example, a glass composite material. A hole 6a1 through which the cylindrical portion 3e (see FIG. 1B) of the insulating plate 3 is inserted is opened in the center of the substrate 6a.
The wiring patterns 10ah, 10bh, 10ch supply currents from the power supply substrate 4 to the LEDs 10a, 10b, 10c, respectively.
Wiring patterns 10ah, 10bh, 10ch and a ground wiring pattern 10g are connected to the connector 6k.
The three systems of LEDs 10a, 10b, and 10c are repeatedly mounted on the substrate 6a in a spiral or spiral manner.

<Distance between LEDs 110a, 110b, 110c in Comparative Example>
FIG. 3A shows a view of the light source substrate 106 of the comparative example viewed from below, corresponding to the direction of arrow I in FIG. 1A. FIG. 3B shows an enlarged view of part III in FIG. 3A of the comparative example.
The light source board 106 of the comparative example has a board 106a, three systems of LEDs 110a, 110b and 110c, respective wiring patterns 110ah, 110bh and 110ch, a ground wiring pattern 110g and a connector 106k.

The three systems of LEDs 110a, 110b, and 110c are provided on the substrate 6a so as to form three circumferential first, second, and third LED row circumferences 106s1, 106s2, and 106s3.
In the case of the comparative example, the three systems of LEDs 110a, 110b, and 110c become the following wiring patterns 110ah, 110bh, and 110ch due to the LED mounting form of the three LED row circumferences 106s1, 106s2, and 106s3.

As shown in FIG. 3B, wiring patterns 110bh and 110ch to the first LED row circumference 106s1, a ground wiring pattern 110g, and a wiring pattern to the second LED row circumference 106s2 are provided between the LEDs 110a1 and 110c1 in the first LED row circumference 106s1. 110ah and 110bh pass. That is, five wiring patterns pass between the LEDs 110a1 and 110c1 in the first LED row circumference 106s1.
Wiring patterns 110bh and 110ch to the second LED row circumference 106s2, ground wiring pattern 106g, and wiring patterns 110ah and 110bh to the third LED row circumference 106s3 pass between the LEDs 110a2 and 110c2 in the second LED row circumference 106s2. That is, five wiring patterns pass between the LED 110a2 and the LED 110c2 in the second LED row circumference 106s2.

Wiring patterns 110bh and 110ch to the third LED row circumference 106s3 pass between the LED 110a3 and the LED 110c3 in the third LED row circumference 106s3. That is, two wiring patterns pass between the LED 110a3 and the LED 110c3 in the third LED row circumference 106s3.
Here, it is necessary to make the intervals between the LEDs 110a, 110b, and 1LED 10c equal in order to provide illumination without luminance unevenness.

In the case of the comparative example, in order to provide illumination without luminance unevenness, five wiring patterns pass between the LEDs 110a1 and 110c1 on the first LED row circumference 106s1, and between the LEDs 110a2 and 110c2 on the second LED row circumference 106s2. Since five wiring patterns pass between them, it is necessary to leave a space for five wiring patterns to pass between the LEDs 110a, 110b, and 1LED 10c.
That is, if the minimum pattern width is t, and the required distance between patterns is d, five wiring patterns pass through the portion where the wiring patterns 110ah, 110bh, and 110ch are the densest when jumper elements are not used. , 110b and 110c would require a gap of 5t+6d.

If a gap of 5t+6d is provided between the LEDs 110a, 110b, and 110c, the distance is large, which may cause luminance unevenness.
On the other hand, as shown in FIG. 14, when a three-dimensional wiring pattern is formed in order to narrow the interval between the LEDs 101, a jumper element is formed in the connecting portion 106 between the lens 102 covering the LED 101 and the lens 102 covering the adjacent LED 101. 103 is required. Then, a convex portion 104 t is formed on the connecting portion 106 of the lens 102 covering the jumper element 103 . In this case, the light h100 emitted from the lens 102 becomes stray light 101h on the convex portion 104t, increasing the optical loss.

<Distance between LEDs 10a, 10b, 10c of Embodiment 1>
On the other hand, in the first embodiment, as shown in FIG. 2B, the wiring pattern passing between the LEDs 10a, 10b, 10c is any one of the wiring patterns 10ah, 10bh, 10ch and the ground wiring pattern 10g. wiring pattern. Therefore, in the case of the first embodiment, if the minimum pattern width is t and the required distance between patterns is d, one wiring pattern passes through the portion where the wiring patterns among the LEDs 10a, 10b, and 10c are the densest. t+2d gap is enough.

FIG. 4 shows a bottom view of the light source board 6 of Embodiment 1, in which three systems of LEDs 10a, 10b, and 10c mounted spirally or spirally in the same row on the light source board 6 are represented by a thick solid line J1.
By arranging the LEDs 10a, 10b, 10c spirally or spirally, the three systems of the LEDs 10a, 10b, 10c can be arranged in the same row with a narrow pitch. Since the intervals between the LEDs 10a, 10b, and 10c are short, uneven brightness and uneven color can be reduced.

As shown in FIGS. 2A and 2B, the wiring patterns 10ah, 10bh, 10ch, and 10g are easy to route. Therefore, as shown in FIG. Wiring is possible without using Therefore, the convex portion 106t shown in FIG. 14 is not formed on the connecting portion 12r of the lens 12. FIG. This prevents the light h10 of the LEDs 10a, 10b, and 10c emitted from the lens 12 from straying, thereby suppressing optical loss.

According to the above configuration, the LEDs 10a, 10b, and 10c of the plurality of systems can be arranged with a narrow pitch, so that even if the thickness of the lighting fixture as a whole is reduced, color unevenness and luminance unevenness can be reduced.
Further, since the connecting portion 12r between the lenses 12 does not need to have a convex shape, the amount of stray light in the connecting portion 12r can be reduced and the optical loss can be reduced. Therefore, the highly efficient LED lighting device 1 can be provided.
Therefore, it becomes easy to narrow the pitch of the LEDs 10a, 10b, and 10c, and the LED lighting device 1 with reduced color unevenness and brightness unevenness can be realized.

<<Embodiment 2>>
FIG. 5 shows a bottom view of the light source substrate 26 of the LED lighting device 21 of Embodiment 2 as seen from below.
In the LED lighting device 21 of the second embodiment, similarly to the first embodiment, the three LEDs 10a, 10b, 10c are arranged in the same row in a spiral or spiral shape, and a lens 22 is attached to each of the LEDs 10a, 10b, 10c. is the case. Since other configurations are the same as those of the first embodiment, detailed description thereof will be omitted.

The light source board 26 of the second embodiment has a board 26a, three systems of LEDs 10a, 10b, and 10c, wiring patterns, connectors, and lenses 22. FIG.
The light source substrate 26 has the LEDs 10a, 10b, and 10c mounted in a spiral or spiral shape on the substrate 26a.
A lens 22 is formed to diffuse the light to each of the LEDs 10a, 10b, 10c on the substrate 26a and to protect each of the LEDs 10a, 10b, 10c.

According to the above configuration, the lens 22 is formed on each of the LEDs 10a, 10b, 10c, so that the diffusion performance of the LEDs 10a, 10b, 10c can be controlled.

<Modification>
FIG. 6 shows a bottom view of the light source substrate 36 of the LED lighting device 31 of the modification as viewed from below.
The LED lighting device 31 of the modified example has three lines of LEDs 10a, 10b, and 10c arranged in a double spiral or double spiral shape.
In the light source board 36 of the modified example, three systems of LEDs 10a, 10b, and 10c are mounted in the same row on the board 34a in a first spiral or spiral first LED row 10R1. Three LEDs 10a, 10b, and 10c are mounted on the substrate 36a between the first LED rows 10R1 in the same row on a second spiral or spiral second LED row 10R2.

A lens 32 is formed on each of the LEDs 10a, 10b, and 10c.
FIG. 7 shows first and second LED rows 11R1 and 11R2 of three systems of LEDs 10a, 10b, and 10c mounted in the same row on the light source substrate 36 of the modification in a double spiral or double spiral shape. A bottom view of the light source substrate 36 indicated by solid lines J21 and J22 is shown.

In the LED lighting device 31A of the modification shown in FIG. 7, the three LEDs 10a, 10b, and 10c shown in FIG. It is mounted on the double spiral first LED row 11R1 and the second LED row 11R2.
According to the configuration of the modified example, it is possible to improve the degree of freedom in arranging the LEDs 10a, 10b, and 10c of the LED lighting devices 31 and 31A. Also, the illuminance of the LED lighting devices 31 and 31A can be mentioned.

<Modification 1>
FIG. 8 shows a bottom view of the light source substrate 46 of the LED lighting device 41 of Modification 1 as viewed from below.
The LED lighting device 41 of Modification 1 has three systems of LEDs 10a, 10b, and 10c arranged in the same row in a triple spiral shape or a triple spiral shape.
In the light source substrate 46 of Modification 1, the three LEDs 10a, 10b, and 10c on the substrate 46a are arranged in a first spiral or first spiral LED row 21R1 in the same row and a second spiral LED row 21R1 in the same row. A spiral or second spiral second LED row 21R2 and a third spiral or third spiral third LED row 21R3 in the same row.

Note that in FIG. 8, a first spiral or first spiral first LED row 21R1, a second spiral or second spiral second LED row 21R2, and a third spiral The third LED row 21R3 in the shape of a spiral or the third spiral is represented by thick solid lines J31, J32, and J33, respectively.

<Modification 2>
FIG. 9 shows a bottom view of the light source substrate 56 of the LED lighting device 51 of Modification 2 as seen from below.
The LED lighting device 51 of Modification 2 has three systems of LEDs 10a, 10b, and 10c arranged in the same row in a polygonal spiral shape or a polygonal spiral shape.
In the light source board 56 of Modified Example 2, the three systems of LEDs 10a, 10b, and 10c are mounted on the same row of polygonal spiral or polygonal spiral LED rows 31R on the substrate 56a.

In FIG. 9, the polygonal spiral or polygonal spiral LED row 31R is indicated by a thick solid line J4.

<Modification 3>
FIG. 10 shows a bottom view of the light source substrate 66 of the LED lighting device 61 of Modification 3 as viewed from below.
The LED lighting device 61 of Modification 3 has three systems of LEDs 10a, 10b, and 10c arranged in a counterclockwise spiral or spiral.
In the light source board 66 of Modification 3, three systems of LEDs 10a, 10b, and 10c are mounted in a counterclockwise spiral or spiral LED row 41R on the board 66a.

In FIG. 10, the counterclockwise spiral or spiral LED row 41R is indicated by a thick solid line J5.

<Modification 4>
FIG. 11 shows a bottom view of the light source substrate 76 of the LED lighting device 71 of Modification 4 as viewed from below.
An LED lighting device 71 of Modified Example 4 has three systems of LEDs 10a, 10b, and 10c arranged in a spiral or spiral manner.
In the light source board 76 of Modified Example 4, three systems of LEDs 10a, 10b, and 10c are mounted on a board 76a in an LED row 51R that is spirally or spirally folded back at a folding portion 51r1.

In addition, in FIG. 11, the LED row 51R folded in a spiral or spiral shape is indicated by a thick solid line J6.
According to Modification 4, an LED lighting device 71 with a high degree of design freedom is obtained.

<Modification 5>
FIG. 12 shows a bottom view of the light source substrate 86 of the LED lighting device 81 of Modification 5 as viewed from below.
The LED lighting device 81 of Modified Example 5 has three systems of LEDs 10a, 10b, and 10c arranged in a spiral or spiral shape and partly in a straight line.
In the light source substrate 86 of Modified Example 5, three systems of LEDs 10a, 10b, and 10c are mounted on the LED array 61R of the spiral or spiral portion 61r1 and the linear portion 61r2 on the substrate 86a.

In FIG. 12, the thick solid line J7 represents the LED row 61R that includes the spiral or spiral circular portion 61r1 and the linear portion 61r2.
According to Modification 5, an LED lighting device 81 with a high degree of design freedom is obtained.
The number of each of the circular portions 61r1 and the linear portions 61r2 in the LED row 61R can be arbitrarily selected.

<Modification 6>
FIG. 13 shows a bottom view of the light source substrate 96 of the LED lighting device 91 of Modification 6 as viewed from below.
An LED lighting device 91 of Modification 6 has three systems of LEDs 10a, 10b, and 10c arranged in a spiral or spiral quadrangular shape.
In the light source board 96 of Modification 6, the three systems of LEDs 10a, 10b, and 10c are mounted on the board 96a in a spiral or spiral quadrangular LED row 71R.

In FIG. 13, the spiral or spiral square LED row 71R is indicated by a thick solid line J8.
Here, in Modification 5, the spiral or spiral quadrangular LED array 71R was described as an example, but the LED array 71R may be arranged in a triangular, pentagonal or more polygonal shape.

According to Embodiment 2, Modifications, and Modifications 1 to 6, the pitches of the three LEDs 10a, 10b, and 10c can be narrowed. Brightness unevenness can be reduced.

In addition, as shown in FIG. 2C, since the connecting portion 12r between the lenses 12 does not need to have a convex shape, the light straying to the connecting portion 12r can be reduced and the optical loss can be reduced. Therefore, highly efficient LED lighting devices 21 to 91 can be provided.
It becomes easy to narrow the pitch of the LEDs 10a, 10b, and 10c, and the LED lighting devices 21 to 91 with reduced color unevenness and luminance unevenness can be realized.

<<other embodiments>>
1. In the above embodiments, modified examples, and the like, three systems of LEDs 10a, 10b, and 10c have been described as examples, but one or two systems of LEDs, or four or more systems of LEDs may be used.

2. In the above-described embodiments, modified examples, and the like, LEDs have been exemplified and explained as light sources, but light sources other than LEDs or point light sources may also be applied. Even if it is applied to light sources other than LEDs or point light sources, similar effects can be obtained.

3. The spiral or spiral LEDs 10a, 10b, 10c of the embodiments and modifications described above may be arranged clockwise or counterclockwise. The same effects are obtained whether the LEDs 10a, 10b, 10c are arranged clockwise or counterclockwise.

4. The spiral or spiral LEDs 10a, 10b, 10c of the embodiments and modifications described above may all be uniformly lensed, each may be lensed, or any number of LEDs 10a, 10b, 10c may be covered with a lens.

5. In the modified example and the modified example 1, the case where the LEDs (10a, 10b, 10c) are arranged in a double or triple spiral shape or a double or triple spiral shape has been described. spiral or multiple spirals of four or more.
As a result, the LED lighting device 1 with a high degree of freedom in design can be obtained.

6. The present invention is not limited to the configurations of the above-described embodiments and modifications, and various modifications and specific forms are possible within the scope of the attached claims.

1, 21, 31, 41, 51, 61, 71, 81, 91 lighting device (LED lighting device)
10a, 10b, 10c light source (LED)
6, 26, 36, 46, 56, 66, 76, 86, 96 Light source substrate 8 Shade (diffusing cover)
12, 22, 32 lens (lens part)
51R Folded light source (folded LED row)
61r1 Circumferential part (curved light source)
61r2 straight part (linear light source)

Claims (8)

a plurality of light sources;
a light source substrate on which the light source is mounted;
a lens portion that covers the light source;
A diffusion cover covering the light source and the lens unit,
The lighting device, wherein the plurality of light sources are provided in a spiral or spiral shape. The lighting device according to claim 1,
The lighting device, wherein the plurality of light sources are arranged clockwise or counterclockwise. The lighting device according to claim 1,
The lighting device, wherein the plurality of light sources are provided in a double or more multiple spiral shape or a double or more multiple spiral shape. The lighting device according to claim 1,
The illumination device, wherein the plurality of light sources are folded back. The lighting device according to claim 1,
The lighting device, wherein the plurality of light sources are arranged in a curved line or in a straight line. The lighting device according to claim 1,
The lighting device, wherein the plurality of light sources are arranged in a plurality of spirals or spirals. The lighting device according to claim 1,
The lighting device, wherein the lens section individually covers the plurality of light sources, or partially or entirely covers the plurality of light sources. The lighting device according to claim 1,
The illumination device, wherein the light source is an LED.

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