JP2021051861A - Light emitting module and lighting device - Google Patents

Abstract

To provide a light emitting module which achieves good yield of a substrate material and excellent heat radiation performance, and to provide a lighting device.SOLUTION: A light emitting module 10 includes: LED elements 1; a lighting circuit 20 which causes the LED elements 1 to light; and one substrate 30. The substrate 30 integrally has: a first portion 31 which has one end 31a and the other end 31b arranged along a longitudinal direction and in which the LED elements 1 are arranged in the longitudinal direction; and a second portion 32 which has one end 32a located adjacent to the one end 31a of the first portion 31 in a width direction of the substrate 30 and the other end 32b located adjacent to the first portion 31 between the one end 31a and the other end 31b of the first portion 31 and in which electronic components 21, 22 of the lighting circuit 20 are mounted.SELECTED DRAWING: Figure 3

Description

Embodiments of the present invention relate, for example, to lighting fixtures such as ceiling-mounted base lights and light-emitting modules.

Conventionally, as a lighting fixture to be mounted on a ceiling, for example, a base light including a light emitting module in which a plurality of LED elements are mounted on a substrate is known. Further, as this kind of base light, a device in which a plurality of electronic components constituting a circuit for lighting a plurality of LED elements are collectively mounted on a substrate of a light emitting module is known. The substrate of this light emitting module has an area for mounting a plurality of LED elements and an additional area for mounting a plurality of electronic components.

JP-A-2019-8868

In the above-mentioned substrate of the conventional light emitting module, since the region added for mounting the electronic component has a distorted shape, the yield of the substrate is low, and the manufacturing cost of the substrate is increased accordingly. Further, when an area for mounting other electronic components is added to a board on which a plurality of LED elements that generate heat are mounted, it is necessary to form the board in consideration of heat dissipation of the LED elements.

Therefore, it is desired to develop a light emitting module and a lighting fixture having a good yield of substrate material and excellent heat dissipation.

The light emitting module according to the embodiment has a plurality of light emitting elements; a lighting circuit for lighting the plurality of light emitting elements; a first end portion and a second end portion along a first direction, and a plurality of light emitting elements. A first portion mounted side by side in the first direction, and a third end and a first end adjacent to a second direction orthogonal to the first direction with respect to the first end of the first portion. A second portion having a fourth end adjacent to the first portion in the second direction between the end portion and the second end portion of the lighting circuit and mounting an electronic component of the lighting circuit is integrated. It has one substrate and;

According to the embodiment, it is possible to provide a light emitting module and a lighting fixture having a good yield of a substrate material and excellent heat dissipation.

FIG. 1 is a perspective view of the base light according to the embodiment as viewed from the ceiling side. FIG. 2 is a cross-sectional view of the base light of FIG. 1 as viewed along F2-F2. FIG. 3 is a plan view showing a light emitting module incorporated in the base light of FIG. FIG. 4 is a plan view showing a light emitting module in which another light emitting module is connected to the light emitting module of FIG. FIG. 5 is a diagram for explaining a method of manufacturing the substrate of the light emitting module of FIG. FIG. 6 is a diagram for explaining another manufacturing method of the substrate of the light emitting module of FIG. FIG. 7 is a plan view showing a light emitting module in which four light emitting modules including the light emitting module of FIG. 3 are connected.

Hereinafter, embodiments will be described in detail with reference to the drawings.
The light emitting module 10 according to the embodiment includes a plurality of LED elements 1, a lighting circuit 20 for lighting the plurality of LED elements 1, and a substrate 30 on which the electronic components 21 and 22 of the lighting circuit 20 are mounted together with the plurality of LED elements 1. Have. The substrate 30 is a single plate integrally having a first portion 31 in which a plurality of LED elements 1 are mounted side by side in the longitudinal direction and a second portion 32 in which the electronic components 21 and 22 of the lighting circuit 20 are mounted. It is a state. One end 31a in the longitudinal direction of the first portion 31 and one end 32a in the longitudinal direction of the second portion 32 are adjacent to each other in the width direction of the substrate 30, and the other end 32b of the second portion 32 is one end of the first portion 31. It is arranged between 31a and the other end 31b.

The base light 100 according to the embodiment includes the above-mentioned light emitting module 10 and a connector 40 for mechanically attaching and electrically connecting the light emitting module 10 to the writing rail L. With the base light 100 attached to the lighting rail L, the electronic component 22 of the lighting circuit 20 is arranged at a position that does not interfere with the lighting rail L.

FIG. 1 shows a perspective view of a base light 100 as viewed from the ceiling C side of a building as an example of a lighting fixture according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the base light 100 of FIG. 1 cut along F2-F2. As shown by the alternate long and short dash line in FIG. 1, a writing rail L for attaching the base light 100 is attached to the ceiling C. The base light 100 has a light emitting module 10 (FIG. 3) described later, a connector 40 for attaching the light emitting module 10 to the writing rail L, a chassis 50 facing the ceiling C, and a cover 60. The connector 40 is provided on the back surface 52 of the chassis 50 at substantially the center of the base light 100 in the longitudinal direction. The base light 100 is attached to the ceiling C in a posture along the extending direction of the writing rail L. The connector 40 is responsible for the mechanical and electrical connection of the base light 100 to the writing rail L.

As shown in FIG. 2, the substrate 30 of the light emitting module 10 is fixed to the surface 51 of the chassis 50 with a heat conductive adhesive, screws, or the like. The chassis 50 has a front surface 51 to which the substrate 30 is attached and a back surface 52 to which the connector 40 is attached. The chassis 50 is formed of, for example, one metal plate, and has a function of contacting the back surface 30b of the substrate 30 to hold the substrate 30 and dissipating heat of the LED element 1 (light emitting element). The chassis 50 is preferably formed of a metal material having good thermal conductivity, but may be formed of a resin having good thermal conductivity or the like. Further, the chassis 50 is not an indispensable configuration, and the connector 40 may be mounted on the back surface 30b of the substrate 30 to omit the chassis 50. In this case, it is desirable that the substrate 30 is made of a material having good thermal conductivity.

A cover 60 that covers the surface 30a side of the substrate 30 is attached to the surface 51 side of the chassis 50 to which the substrate 30 is attached. The cover 60 is formed of, for example, a transparent white resin material, and has a cross-sectional shape that bulges like a dome from the ceiling C toward the floor (not shown). End plate members 61 and 62 (FIG. 1) for closing the opening between the cover 60 and the chassis 50 are attached to both ends in the longitudinal direction.

The chassis 50 has a protruding portion 54 (FIGS. 1 and 2) protruding toward the back surface 52 side thereof. The protruding portion 54 is formed by bending a part of the chassis 50 toward the ceiling C in a U-shaped cross section. Inside the protruding portion 54, a through-hole mounting type electronic component 22 mounted on the back surface 30b of the substrate 30 is housed and arranged. That is, the protruding portion 54 is provided at a position facing the lighting circuit 20. That is, the protruding portion 54 is provided at a position where the base light 100 is attached to the writing rail L (the state shown in FIG. 2) and does not interfere with the writing rail L.

As shown in FIG. 3, the substrate 30 integrally has a rectangular plate-shaped first portion 31 and a rectangular plate-shaped second portion 32 shorter than the first portion 31. The substrate 30 has an L-shaped shape of one flat plate-shaped member. The first portion 31 and the second portion 32 are arranged adjacent to each other in the width direction orthogonal to the longitudinal direction of the substrate 30. One end 31a (first end) of the first portion 31 of the substrate 30 and one end 32a (third end) of the second portion 32 are adjacent to each other in the width direction orthogonal to the longitudinal direction of the substrate 30. Have been placed. The other end 32b (fourth end) of the second portion 32 of the substrate 30 has a length less than half of the length along the longitudinal direction of the first portion 31 and is located at a position separated from one end 32a in the longitudinal direction. It is in. That is, the second portion 32 of the substrate 30 is located at a position offset to one end 31a side of the first portion 31.

A plurality of LED elements 1 and a plurality of electronic components 21 of the lighting circuit 20 are mounted on the surface 30a of the substrate 30. The electronic component 21 mounted on the surface 30a of the substrate 30 is, for example, a surface mount type electronic component 21. The plurality of LED elements 1 are arranged side by side at equal intervals along the longitudinal direction of the first portion 31 of the substrate 30. The distance between the plurality of LED elements 1 is determined according to the light distribution characteristics of the base light 100. Therefore, the length of the substrate 30 is also determined by the length of the first portion 31. The electronic component 21 has various shapes and sizes, and is provided on the second portion 32 of the substrate 30. Unlike the LED element 1, the electronic component 21 does not need to consider heat dissipation so much. Therefore, the electronic components 21 can be mounted more densely than the LED element 1. In other words, the mounting area of the electronic component 21 can be made smaller than the mounting area of the LED element 1, and can be, for example, less than half of the mounting area of the LED element 1.

The electronic component 21 is arranged between the LED elements 1 mounted on the first portion 31 along the longitudinal direction of the substrate 30. In other words, the electronic component 21 is provided at a position deviated from the position facing the LED element 1 in the width direction of the substrate 30. By arranging the electronic component 21 between the LED elements 1 in this way, the electronic component 21 can be arranged at a position as far as possible from the LED element 1, and is sufficiently between the LED element 1 and the electronic component 21. A good creepage distance can be secured. Further, by adopting such a layout of the electronic component 21, the electronic component 21 can be mounted at a position as far as possible from the LED element 1 that generates heat, and the LED element 1 and the electronic component 21 are mounted on the same substrate. As a result, it is possible to suppress a problem that impairs heat dissipation performance.

Further, a power supply terminal block 24 (power supply unit) is attached to the other end 32b of the second portion 32 of the substrate 30. The power supply terminal block 24 is electrically connected to the writing rail L via the connector 40. The power supply terminal block 24 and the connector 40 are electrically connected by a wiring (not shown) provided through the chassis 50. The electronic components 21 and 22 of the lighting circuit 20 mounted on the substrate 30 convert an AC voltage of 100 V supplied via the writing rail into a direct current and supply the power to the plurality of LED elements 1. Therefore, on the surface 30a of the substrate 30, the vicinity of one end 31a of the first portion 31 and one end 32a of the second portion 32 (one end of the substrate 30 including one end 31a and one end 32a, the lighting circuit 20 and the LED element 1). Between), a wiring pattern 26 in which the lighting circuit 20 is electrically connected to the plurality of LED elements 1 is provided. In FIG. 3, the wiring pattern of the lighting circuit 20 and the wiring pattern of the plurality of LED elements 1 are not shown.

Further, a plurality of through-hole mounting type electronic components 22 included in the lighting circuit 20 are mounted on the back surface 30b of the substrate 30 (FIG. 2). Since these plurality of electronic components 22 are attached to the second portion 32 of the substrate 30 via the lead terminals, the substrate 30 is compared with the surface mount type electronic component 21 mounted on the surface 30a of the substrate 30 described above. The mounting height is high. In the present embodiment, the electronic component 22 having such a height is arranged on the back surface 30b side of the substrate 30 and in the protruding portion 54 of the chassis 50 so that the protruding portion 54 does not interfere with the writing rail L. Provided.

In other words, in the present embodiment, the light emitting module 10 is laid out at the position shown in FIG. 3 so that the center line along the longitudinal direction of the first portion 31 of the light emitting module 10 overlaps with the center line of the base light 100, and the substrate is used. The second portion 32 of 30 was positioned to be offset to one side in the width direction of the base light 100. That is, the first portion 31 of the substrate 30 on which the plurality of LED elements 1 are mounted is arranged on the center line of the base light 100, and the second portion 32 is added to one side in the width direction of the first portion 31. As a result, the lighting rail L facing the center line of the base light 100 and the protruding portion 54 of the chassis 50 facing the second portion 32 of the substrate 30 can be arranged in a nested manner as shown in FIG.

As described above, the light emitting module 10 of the present embodiment has a plurality of electronic components 21 and 22 of the lighting circuit 20 mounted on the second portion 32 having a length less than half the length of the first portion 31. There are no electronic components 21 and 22 arranged adjacent to the LED element 1, which is approximately half of the LED element 1. Therefore, the heat dissipation performance of the LED element 1 can be maintained to some extent as a whole of the substrate 30, and the heat of the LED element 1 is sufficiently generated even though the LED element 1 and the electronic components 21 and 22 are mounted on the same substrate. Can dissipate heat.

Further, according to the light emitting module 10 of the present embodiment, since the other end 32b of the second portion 32 of the substrate 30 is arranged at a substantially intermediate position in the longitudinal direction of the first portion 31, the lighting circuit 20 is located at this position. A power supply terminal block 24 for power supply to the power supply terminal block 24 can be provided. Further, a wiring pattern 26 connecting the lighting circuit 20 and the LED element 1 can be provided in the vicinity of one end 31a of the first portion 31 and one end 32a of the second portion 32. Therefore, the layout of the wiring can be made efficient without waste, the wiring can be shortened, the electrical characteristics can be stabilized, and defects due to noise can be suppressed.

FIG. 4 shows a base light 200 provided with a long light emitting module in which one end of another light emitting module 10A of another base light 100A is connected to the other end of the light emitting module 10 of the base light 100 described above. In this way, when connecting the two light emitting modules 10 and 10A, a connection terminal block 72 (connection portion) is provided at the other end 31b of the first portion 31 of the substrate 30 of one light emitting module 10, and the other is provided. A connection terminal block 74 (connection portion) is provided at one end 81 of the substrate 80 of the light emitting module 10A. Then, the connection terminal blocks 72 and 74 are electrically connected to each other. The base lights 100 and 100A can be attached to the writing rail L as described above. That is, the base light 100A also has a connector (not shown) for mechanical connection to the writing rail L. Therefore, a mechanism for mechanically connecting the base light 100 and the base light 100A is unnecessary.

Power is supplied to another light emitting module 10A by connecting the connection terminal blocks 72 and 74. That is, in this case, the other light emitting module 10A does not have an independent lighting circuit. Therefore, the substrate 30A of another light emitting module 10A is formed in a rectangular plate shape corresponding to the first portion 31 of the substrate 30 of the light emitting module 10. In the light emitting modules 10 and 10A of this modification, a plurality of LED elements 1 mounted on the substrate 30 and a plurality of LED elements 1 mounted on the substrate 30A are connected in series. Therefore, it is not necessary to provide feed wiring from the lighting circuit 20 on each of the different substrates 30 and 30A.

Next, a method of manufacturing the L-shaped substrate 30 of the light emitting module 10 described above will be described with reference to FIGS. 5 and 6.
As described above, the substrate 30 of the light emitting module 10 has an L-shape in which the first portion 31 and the second portion having a length less than half of the first portion 31 are arranged adjacent to each other in the width direction of the substrate 30. Has. When the substrate 30 having such a unique shape is manufactured, for example, a rectangular plate having the same width as the substrate 30 and a length of more than 1.5 times that of the substrate 30 is formed into two portions as shown in FIG. It can be cut to produce two substrates 30 at the same time. In the example shown in FIG. 5, the narrow first portions of the substrates 30 are overlapped in the width direction, and the other end 31b of the first portion 31 of the one substrate 30 is the second portion 32 of the other substrate 30. Two substrates 30 are formed in a layout in which the other end 31b of the first portion 31 of the other substrate 30 faces the other end 32b of the second portion 32 of the other substrate 30 and faces the other end 32b of the second portion 32 of the other substrate 30. did. In this case, there is almost no waste of the substrate material, and the yield can be increased.

Alternatively, two substrates 30 can be manufactured at the same time by cutting a rectangular plate having a width 1.5 times the width of the substrate 30 and the same length as the substrate 30 into three portions as shown in FIG. it can. In the example shown in FIG. 6, the first portion 31 of one substrate 30 and the second portion of the other substrate 30 are opposed to each other in the width direction, and the second portion 32 of one substrate 30 and the other substrate 30 are opposed to each other. The first portion 31 is opposed to each other in the width direction, and the other end 32b of the second portion 32 of one substrate 30 and the other end 32b of the second portion 32 of the other substrate 30 are opposed to each other via a rectangular small piece. Two substrates 30 were formed in the layout. Even in this case, although the yield of the substrate material is slightly inferior to that of the manufacturing method of FIG. 5, the yield of the substrate material can be sufficiently increased.

According to the light emitting module 10 and the base light 100 (lighting fixture) of the above-described embodiment, since the L-shaped substrate 30 on which the plurality of LED elements 1 and the electronic components 21 and 22 of the lighting circuit 20 are mounted is used, the substrate is used. The yield of the material can be increased, and the heat of the LED element 1 can be effectively dissipated.

Although embodiments of the present invention have been described, this embodiment or modification is presented as an example and is not intended to limit the scope of the invention. These embodiments or modifications can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments or modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, in the modification shown in FIG. 4 described above, the base light 200 in which the two substrates 30 and 30A are linearly connected has been described, but the present invention is not limited to this, and as shown in FIG. 7, the four substrates 30 , 30A, 30B, 30C may be connected to form a base light 300 including a long light emitting module. In this case, the light emitting module 10B having the substrate 30B having the same shape as the substrate 30 of the light emitting module 10 of the base light 100 is connected to the light emitting module 10 in the inverted direction, and the lighting circuit 20 of the light emitting module 10 and the light emitting module 10B are connected. A lighting circuit (not shown) is placed close to each other. Then, the light emitting module 10A was connected to the other end separated from the lighting circuit 20 of the light emitting module 10 in the same manner as the above-described modification, and the light emitting module 10C having substantially the same structure as the light emitting module 10A was separated from the lighting circuit of the light emitting module 10B. Connect to the other end.

By centrally arranging the two lighting circuits in the center of the base light 300 in the longitudinal direction as described above, the wiring structure can be simplified by centering the feeding position with respect to the base light 300. As a result, even when a long base light 300 is configured, the same electrical characteristics as the base light 100 can be maintained, and problems due to noise do not occur.

1 ... LED element, 10 ... Light emitting module, 10A ... Another light emitting module, 20 ... Lighting circuit, 21 ... Electronic component (surface mount), 22 ... Electronic component (through hole mounting), 24 ... Power supply terminal block, 26 ... Wiring pattern , 30 ... substrate, 30a ... front surface, 30b ... back surface, 31 ... first part, 31a ... one end (first end), 31b ... other end (second end), 32 ... second part, 32a ... one end (third end), 32b ... the other end (fourth end), 40 ... connector, 50 ... chassis, 51 ... front, 52 ... back, 54 ... protruding part, 60 ... cover, 72, 74 ... Connection terminal block, 100 ... Base light, 100A ... Another base light, C ... Ceiling, L ... Lighting rail.

Claims (6)

With multiple light emitting elements;
With a lighting circuit that lights the plurality of light emitting elements;
A first portion having a first end portion and a second end portion along the first direction and mounting the plurality of light emitting elements side by side in the first direction, and the first portion of the first portion. A third end adjacent to the first direction in a second direction orthogonal to the first end and the first portion between the first end and the second end. On the other hand, a single substrate having a fourth end portion adjacent to the second direction and a second portion integrally having an electronic component of the lighting circuit mounted;
Luminous module with. With the feeding portion arranged at the fourth end portion of the second portion of the substrate;
A wiring pattern in which the lighting circuit and the plurality of light emitting elements are connected in the vicinity of the first end portion of the first portion and the third end portion of the second portion;
The light emitting module according to claim 1. The electronic component is arranged between the plurality of light emitting elements along the first direction.
The light emitting module according to claim 1 or 2. With another light emitting module having another substrate on which multiple light emitting elements are mounted;
With a connection portion mounted on the substrate at the second end portion of the first portion and electrically connecting the other light emitting module;
The light emitting module according to any one of claims 1 to 3, further comprising. With multiple light emitting elements;
With a lighting circuit that lights the plurality of light emitting elements;
A first portion having a first end portion and a second end portion along the first direction and mounting the plurality of light emitting elements side by side in the first direction, and the first portion of the first portion. A third end adjacent to a second direction orthogonal to the first direction with respect to one end and a length of less than half the length of the first portion along the first direction. A second portion having a fourth end portion adjacent to the first portion at a position away from the third end portion in the first direction and mounting an electronic component of the lighting circuit. With one board that is integrally held;
Luminous module with. With the light emitting module according to any one of claims 1 to 5.
It has a connector that mechanically attaches and electrically connects the light emitting module to the writing rail;
The electronic component of the lighting circuit is arranged at a position that does not interfere with the lighting rail.
lighting equipment.

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