JP6376485B2 - LED module, lighting apparatus, and method of manufacturing LED module - Google Patents

Description

The present invention relates to an LED module , a lighting fixture, and a method for manufacturing the LED module .

  Conventionally, there is an LED module configured by mounting a plurality of LEDs on a mounting substrate. In general, LEDs tend to have variations in electrical characteristics (forward voltage) and optical characteristics (chromaticity characteristics / light flux characteristics). Therefore, the LEDs are binned by the LED manufacturer and are grouped into groups (reels) classified according to the range of electrical characteristics and optical characteristics. However, when an LED module is configured using only LEDs belonging to one group, for example, the chromaticity of the LEDs constituting the LED module may be shifted from the target chromaticity. Therefore, there is a method of selecting LEDs from a plurality of groups, configuring an LED module, and adjusting the combined light of the irradiation light of each LED to be a target chromaticity (see, for example, Patent Document 1).

Japanese Patent No. 4884566

  For example, in the circuit configuration of the LED module, a first LED series circuit composed of a plurality of LEDs belonging to the first group and a second LED series circuit composed of a plurality of LEDs belonging to the second group are connected in parallel. The configuration. However, the forward voltage characteristics are different between the first group and the second group. Accordingly, since a large amount of current flows in the LED series circuit having a low forward voltage compared to the LED series circuit having a high forward voltage, variations in luminance occur or heat generation of the LEDs constituting the LED series circuit occurs. The amount increases. When the amount of heat generated by the LED exceeds a certain amount, the lighting device or the component of the lighting device due to the heat generated by the LED may cause heat melting or a decrease in strength, or the life of the LED itself may be shortened. Thereby, the fall of the safety | security as a LED module and the lifetime shortening have been a problem.

  Further, when a first LED parallel circuit in which a plurality of LEDs belonging to the first group are connected in parallel and a second LED parallel circuit in which a plurality of LEDs belonging to the second group are connected in parallel are connected in series, Concentration can be prevented, but there are the following problems. When the LEDs belonging to the first group and the LEDs belonging to the second group are alternately arranged, it is impossible to route only with the conductor formed on the surface of the mounting substrate, and it is necessary to use a jumper or a multilayer substrate. Furthermore, when inspecting electrical and optical characteristics by applying a voltage to both ends of the LED, since the plurality of LEDs are connected in parallel, only the average characteristics or the total characteristics of the LEDs connected in parallel can be obtained. In other words, it is impossible to inspect the electrical characteristics and optical characteristics of a single LED.

The present invention has been made in view of the above-mentioned reasons, and the object thereof is to reduce the luminance variation of the LEDs constituting the LED module and to suppress abnormal heat generation of the LEDs, thereby reducing the safety and shortening the life. An object of the present invention is to provide an LED module , a lighting fixture, and a method for manufacturing the LED module that can prevent the formation of the LED module .

The LED module according to the present invention is an LED module including a plurality of LED series circuits including a plurality of LEDs connected in series, and including an LED parallel circuit in which the plurality of LED series circuits are connected in parallel. Is selected from each of at least two groups out of a plurality of groups corresponding to a plurality of reels and a plurality of reels each including a group of LEDs classified according to the range of forward voltage of the LEDs, and connected in parallel In any combination of two arbitrary LED series circuits among the plurality of LED series circuits, the difference between the total values of the forward voltages of the plurality of LEDs constituting each of the two LED series circuits is less than a threshold value. There, in the LED parallel circuit, the pattern of connection order of the plurality of LED that constitute each of the plurality of LED series circuits, Characterized in that a number pattern.

In this LED module, it is preferable that the plurality of LEDs constituting each of the LED series circuits are arranged side by side, and two adjacent LEDs among the plurality of LEDs are selected from different groups .

The LED constituting the LED series circuit is mounted, and includes a mounting substrate having a conductor that electrically connects the LEDs constituting the LED series circuit, and the LED includes an anode terminal and a cathode facing in one direction. And the LEDs constituting the LED series circuit are mounted on the mounting substrate side by side in the other direction orthogonal to the one direction, and the LEDs constituting the LED series circuit are electrically connected to each other. the conductor to be connected to includes a first mounting portion to which the cathode terminal of one of said LED is mounted, and a second mounting portion to which the anode terminal of the other of said LED is mounted is, the in the conductor It is preferably formed at a position spaced from both ends in the other direction.

The LED constituting the LED series circuit is mounted, and includes a mounting substrate having a conductor that electrically connects the LEDs constituting the LED series circuit, and the LED includes an anode terminal and a cathode facing in one direction. And the LEDs constituting the LED series circuit are mounted on the mounting substrate side by side in the one direction or another direction orthogonal to the one direction, and between the LEDs constituting the LED series circuit. The electrically connected conductor includes a first mounting portion on which the cathode terminal of one of the LEDs is mounted and a second mounting portion on which the anode terminal of the other LED is mounted. It is preferable that the LEDs constituting the series circuit are formed at positions separated in the direction in which the LEDs are arranged .

The lighting fixture of this invention is equipped with said LED module and the fixture main body to which the said LED module is attached, It is characterized by the above-mentioned.
The manufacturing method of the LED module of the present invention is a manufacturing method of an LED module including a plurality of LED series circuits composed of a plurality of LEDs connected in series, and an LED parallel circuit in which the plurality of LED series circuits are connected in parallel. Thus, in any combination of any two LED series circuits among the plurality of LED series circuits connected in parallel, the total value of the forward voltages of the plurality of LEDs constituting each of the two LED series circuits The plurality of LEDs are at least one of a plurality of groups corresponding one-to-one with a plurality of reels including a group of LEDs classified for each range of forward voltage of the LEDs so that the difference between them is equal to or less than a threshold value. select from each of the two groups, in the LED parallel circuit connection of the plurality of LED that constitute each of the plurality of LED series circuits Pattern of Ordinal, so that the plurality of patterns, characterized by mounting the plurality of LED selected to the mounting substrate.

  As described above, in the present invention, current is concentrated on a specific LED series circuit by reducing the difference in the total value of the forward voltage of the LEDs constituting each of the LED series circuits connected in parallel. Therefore, there is an effect that the heat generation of the LED can be suppressed and the lifetime can be prevented.

It is a circuit block diagram of the LED module of embodiment of this invention. It is an external view same as the above. It is a chromaticity coordinate diagram. It is a circuit block diagram of another structure of an LED module. It is the schematic of another structure of an LED module. It is a partial enlarged view of a mounting substrate. It is a disassembled perspective view of a lighting fixture. It is an external view of another structure of an LED module. It is a circuit block diagram of another structure of an LED module. It is a disassembled perspective view of another structure of a lighting fixture. (A) (b) It is a partially enlarged view same as the above. It is the schematic of another structure of an LED module. It is the schematic of another structure of an LED module. It is the schematic of another structure of an LED module. It is a partially enlarged view of the mounting board of another configuration.

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

(Embodiment)
A circuit configuration diagram of the LED module 1 of the present embodiment is shown in FIG. 1, and an external view of the LED module 1 is shown in FIG. In the following description, the vertical and horizontal directions in FIG. 2 are defined as vertical and horizontal directions.

  The LED module 1 of the present embodiment is configured by mounting 36 LEDs 3, 6 capacitors 4, and 1 connector 5 on a mounting board 2 whose longitudinal direction is the left-right direction. Used as a light source.

  First, the circuit configuration of the LED module 1 will be described with reference to FIG.

  The LED module 1 of this embodiment is configured by connecting six LED parallel circuits 31 in series between terminals of a connector 5 to which a DC voltage is applied from a lighting device (not shown).

  Each of the LED parallel circuits 31 is configured by connecting three LED series circuits 32 and one capacitor 4 in parallel. The LED series circuit 32 is configured by connecting two LEDs 3 in series.

  Here, the plurality of LEDs 3 used in the present embodiment is a first group classified by the manufacturer of the LED 3 for each range of electrical characteristics (forward voltage characteristics) / optical characteristics (chromaticity characteristics / light flux characteristics). It is composed of a plurality of LEDs 3a belonging to G1 and a plurality of LEDs 3b belonging to the second group G2. In addition, when not distinguishing LED3a and LED3b, it calls LED3. As shown in FIG. 3, the chromaticity C1 of the irradiation light of the LEDs 3a belonging to the first group G1 has relatively high x and y coordinates relative to the target chromaticity C0. On the other hand, the chromaticity C2 of the irradiation light of the LEDs 3b belonging to the second group G2 has relatively low x-coordinate and y-coordinate values with respect to the target chromaticity C0. Therefore, in this embodiment, by mounting 18 LEDs 3a belonging to the first group G1 and 18 LEDs 3b belonging to the second group G2 on the mounting substrate 2, the chromaticity of the combined light of the LED 3a and the LED 3b is increased. Adjustment is made so that the target chromaticity C0 is obtained.

In the present embodiment, one of the LED3a belonging to the first group G1, by the one LED3b belonging to the second group G2 are connected in series, forming a LED series circuit 32. Here, the range of the forward voltage in the LEDs 3a belonging to the first group G1 is the upper limit value V1max to the lower limit value V1min. Further, the range of the forward voltage in the LEDs 3b belonging to the second group G2 is an upper limit value V2max to a lower limit value V2min. The difference between the upper limit value and the lower limit value of the forward voltage range in each group is the same, and the upper limit value V1max−lower limit value V1min and the upper limit value V2max−lower limit value V2min are the same value. The total value S1 of the forward voltages of the LEDs 3a and LED3b constituting the LED series circuit 32 (hereinafter abbreviated as the total value S1 of the LED series circuit 32) is an upper limit value (V1max + V2max) to a lower limit value (V1min + V2min). Within range. That is, between the LED series circuits 32 connected in parallel, the maximum difference (= (V1max + V2max) − (V1min + V2min)) of the total value S1 of each LED series circuit 32 is equal to or less than a preset threshold value.

When the LED series circuit consisting only of the LEDs 3a belonging to the first group G1 and the LED series circuit consisting only of the LEDs 3b belonging to the second group G2 are connected in parallel as in the prior art, the LED series between the LED series circuits is connected. The difference of the total value of the forward voltage of the circuit was large. However, the LED series circuit 32 of the present embodiment is composed of one LED 3a, 3b selected from each of the first and second groups G1, G2 classified for each forward voltage range of the LED 3. Therefore, the difference of the total value S1 of the LED series circuit 32 between the LED series circuits 32 becomes smaller than the conventional one. Thereby, it is prevented that current concentrates on a specific LED series circuit 32 in the three LED series circuits 32 constituting the LED parallel circuit 31. Therefore, the luminance variation of the LEDs 3 between the LED series circuits 32 constituting the LED parallel circuit 31 is reduced. Furthermore, since the abnormal heat generation of the LED 3 is suppressed, the shortening of the life of the LED 3 can be prevented. Thereby, the safety | security as the LED module 1 improves and it can prevent a lifetime shortening.

  Furthermore, as described above, the difference in the total value S1 of the forward voltage between the LED series circuits 32 is equal to or less than the threshold value. Therefore, it is not necessary to measure the total value S1 of each LED series circuit 32 after the LED 3 is mounted and adjust the difference of the total value S1 of the LED series circuit 32 between the LED series circuits 32 to reduce man-hours. can do. Moreover, when selecting LED3 which comprises LED module 1, what is necessary is just to select from several groups based only on the optical characteristic of LED3, and it is not necessary to consider the electrical characteristic of LED3.

  Further, the capacitor 4 connected in parallel to the LED series circuit 32 has a function of preventing the LED 3 from being damaged by static electricity and a function of preventing the LED 3 from being lighted slightly when the lighting device is controlled to be turned off.

  In the LED series circuit 32, LEDs 3a and 3b having different connection orders are mixed. This indicates that the LEDs 3a and LEDs 3b are alternately mounted on the mounting substrate 2 in the left-right direction. Thereby, the irradiation light of LED3a and the irradiation light of LED3b are efficiently synthesize | combined, and the color nonuniformity of synthetic | combination light can be reduced.

  In the present embodiment, the LED series circuit 32 is configured by the plurality of LEDs 3a belonging to the first group G1 and the plurality of LEDs 3b belonging to the second group G2, but the number of groups is two. It is not limited. For example, as shown in FIG. 4, the LED series circuit 32 may be configured by a plurality of LEDs 3a belonging to the first group G1, an LED 3b belonging to the second group G2, and an LED 3c belonging to the third group. . In the example shown in FIG. 4, the LED series circuit 32 is configured by one LED 3a to 3c selected from each of the first to third groups G1 to G3, and the three LED series circuits 32 and one capacitor 4 are connected in parallel. The LED parallel circuit 31 is comprised by connecting. And the LED module 1 is comprised by connecting four this LED parallel circuits 31 in series.

  Next, the configuration of the mounting substrate 2 will be described with reference to FIGS. As shown in FIG. 5, the LED series circuit 32 is comprised by LED3a and LED3b. In the example described here, the LED parallel circuit 31 is configured by connecting four LED series circuits 32 in parallel, and a plurality of LED parallel circuits 31 are connected in series.

  FIG. 6 is an enlarged external view of a part of the LED module 1. As shown in FIG. 6, the appearance of the LEDs 3a and 3b is formed in a rectangular shape, and the anode terminal 33 and the cathode terminal 34 are provided so as to face each other. In the LEDs 3a and 3b, the direction in which the anode terminal 33 and the cathode terminal 34 face each other is the vertical direction, and the LEDs 3a and the LEDs 3b are alternately mounted in the left-right direction.

  Conductive conductors 20 are formed on the mounting substrate 2, and the anode terminal 33 and the cathode terminal 34 of the LED 3 are soldered to the mounting portion 21 formed on the conductor 20, so that the LED 3 is electrically connected. Connected. Note that portions of the conductor 20 other than the mounting portion 21 are covered with an insulator.

  Moreover, the conductor 20a in FIG. 6 is the conductor 20 which electrically connects between LED3a which comprises LED series circuit 32, and LED3b. The conductor 20a includes a rectangular first conductive portion 201 having a left-right direction as a longitudinal direction, and a rectangular second conductive portion 202 extending continuously upward from the left end of the first conductive portion 201. And is formed in an L shape. The first conductive portion 201 is formed with a first mounting portion 21a on which the cathode terminal 34 of the LED 3a is mounted and a second mounting portion 21b on which the anode terminal 33 of the LED 3b is mounted. The first mounting portion 21 a is formed at a position spaced from the left end of the first conductive portion 201 to the right by the width dimension in the left-right direction of the second conductive portion 202. The second mounting portion 21b is formed at a position that is spaced apart from the first mounting portion 21a in the right direction and spaced away from the right end of the first conductive portion 201 in the left direction.

  As described above, the conductor 20a has a space (heat dissipating part 203) other than the space between the first mounting part 21a and the second mounting part 21b necessary for electrically connecting the LED 3a and the LED 3b. Have. That is, in the conductor 20a, the heat dissipating part 203 is formed on the left side of the first mounting part 21a on which the LED 3a is mounted and on the right side of the second mounting part 21b on which the LED 3b is mounted. And since LED3 can be thermally radiated using this thermal radiation part 203, the heat dissipation of LED3 can be improved.

  Furthermore, as shown in FIG. 5, each LED 3 can be electrically connected only by the conductor 20 formed on the surface of the mounting substrate 2, and it is not necessary to use a jumper or a multilayer substrate. Furthermore, in this embodiment, LED series circuit 32 is comprised by LED3a, 3b being connected in series, and LED parallel circuit 31 is comprised by this LED series circuit 32 being connected in parallel. Therefore, a voltage can be individually applied to each LED 3, and the electrical characteristics and optical characteristics of the LED 3 can be inspected.

  Next, lighting fixture A1 provided with the LED module 1 mentioned above is demonstrated using FIG.

  The lighting fixture A1 of the present embodiment is a ceiling-mounted lighting fixture, and includes a fixture main body 11 attached to the ceiling and a light source unit 12 detachably attached to the fixture main body 11.

  The instrument body 11 is formed in a flat box shape that is long and has an upper surface (opposite surface facing the ceiling), and a rectangular accommodating recess for accommodating the light source unit 12 on the side opposite to the ceiling (that is, the lower side). 111 is provided over the entire length of the instrument body 11.

  The light source unit 12 includes the LED module 1 described above, a mounting member 121, a cover member 123, a lighting device 124, and a terminal block block 125. The mounting board 2 constituting the LED module 1 is attached to the attachment member 121. The cover member 123 is made of milky white acrylic resin having light diffusibility, and is attached to the attachment member 121 so as to cover the LED module 1. The lighting device 124 includes a circuit board 124a and a case 124b that houses the circuit board 124a, and supplies lighting power to each LED 3 on the mounting board 2 via an electric wire (not shown). The terminal block 125 is composed of a rectangular box-shaped terminal block 125 a and a mounting bracket 125 b for mounting the terminal block 125 a to the mounting member 121. Then, a power line (not shown) exposed to the indoor side through the ceiling is connected to the terminal block 125a, and an electric wire (not shown) electrically connected to the lighting device 124 is further connected.

And the lighting device 124 and the terminal block block 125 are attached to the upper side of the attachment member 121, and the LED module 1 and the cover member 123 are attached to the lower side. The mounting fixture 121 to which the LED module 1, the cover member 123, the lighting device 124, and the terminal block block 125 are attached is attached to the housing recess 111 of the fixture body 11, thereby configuring the lighting fixture A <b> 1.

  The lighting fixture A1 of this embodiment includes the LED module 1 described above. Therefore, current is prevented from concentrating on the specific LED series circuit 32 between the LED series circuits 32 constituting the LED parallel circuit 31, so that heat generation of the LED 3 is suppressed and safety is improved. Lifespan can also be prevented.

  In addition, the LED module 1 described above is configured by mounting a plurality of LEDs 3 side by side in a single line in the horizontal direction on a rectangular plate-shaped mounting board 2 whose longitudinal direction is the left-right direction. The shape and the mounting form of the LED 3 are not limited to this. As shown in FIG. 8, the LED module 1A may be configured by mounting a plurality of LEDs 3 in a staggered manner on a substantially square plate-shaped mounting board 2A. In the example shown in FIG. 8, the plurality of LEDs 3 are mounted in a staggered manner, but may be mounted side by side in the vertical and horizontal directions.

  Furthermore, as shown in FIG. 9, the LED module 1 </ b> A has a capacitor 4 connected in parallel with each LED 3. Thereby, the effect which prevents damage to LED3 by static electricity can be improved.

  Next, a lighting fixture A2 using the LED module 1A will be described with reference to FIG. The lighting fixture A2 is a ceiling-mounted lighting fixture, and includes a light source unit 13 having an LED module 1A, a fixture body 14, a frame 15, a panel 16, and a lighting device 17.

  The instrument body 14 includes a rectangular flat plate bottom plate 140 and a side plate 141 bent from the periphery of the bottom plate 140. An electric wire insertion hole 142 is formed in the bottom plate 140, a power line (not shown) is connected to the power terminal block 143 through the electric wire insertion hole 142, and a signal line (not shown) is connected to the signal terminal block 144. . And the instrument main body 14 is fixed to a ceiling by screwing the baseplate 140 to a ceiling material.

  The lighting device 17 is configured by housing a case (not shown) on which a power conversion circuit for converting an alternating voltage / current into a direct voltage / current is mounted in a case 170.

  The frame 15 has a rectangular bottom wall 150 through which the window hole 152 passes, and a side wall 151 rising upward from the periphery of the bottom wall 150, and is formed in a rectangular box shape having an upper surface opened. The frame 15 is detachably attached to the lower surface side of the instrument main body 14 using a holding metal fitting 145 provided on the bottom plate 140.

  The panel 16 is formed in a rectangular flat plate shape with a synthetic resin (for example, acrylic resin) having translucency and mixed with a diffusing material. The panel 16 is housed inside the frame 15 and closes the window hole 152.

Next, the light source unit 13 will be described with reference to FIGS. The light source unit 13 includes four LED modules 1 </ b> A, four reflection sheets 131, four optical blocks 132, and a reflector 133. The reflector 133 has a rectangular flat plate-shaped mounting plate 1330 and four reflecting plates 1331 bent and raised from the periphery of the mounting plate 1330, and is formed in a box shape with the bottom surface opened. Further, the lighting device 17 described above is attached to one of the reflection plates 1331.

  In addition, on the lower surface of the mounting substrate 2A of the LED module 1A, a reflection sheet 131 and an optical block 132 are provided to cover a portion excluding a region where the LED 3 is mounted.

  The reflective sheet 131 is formed by forming a reflective layer made of a material having a relatively high reflectance on the surface of a sheet material made of an insulating material such as synthetic rubber or synthetic resin. The reflection sheet 131 is formed with a through-hole 1310 that exposes the LED 3. That is, the reflection sheet 131 is provided on the lower surface of the mounting substrate 2 </ b> A, so that the irradiation light of the LED 3 is reflected downward by the reflection sheet 131.

  In the optical block 132, a lens 1320 that diffuses light emitted from the LED 3 and a coupling member 1321 that couples the lenses 1320 are integrally formed of a translucent synthetic resin. The optical block 132 is attached to the attachment plate 1330 with screws 134 together with the mounting substrate 2A and the reflection sheet 131.

  The light source unit 13 is attached to the frame 15 using the mounting brackets 18a, 18b, and 18c, and the lighting device A2 is configured by fixing the frame 15 to the fixture body 14.

  The lighting fixture A2 of this embodiment includes the LED module 1A described above. Therefore, current can be prevented from concentrating on a specific LED series circuit 32 in the LED series circuit 32 constituting the LED parallel circuit 31, so that heat generation of the LED 3 is suppressed and safety is improved. It is also possible to prevent the shortening of the life.

  Further, the shape of the mounting substrate 2 and the arrangement / arrangement of the LEDs 3 are not limited to the above. For example, as shown in FIGS. 12 and 13, the LED module 1 may be configured by arranging a plurality of LEDs 3 concentrically on a circular mounting substrate 2B.

  In the example shown in FIG. 12, an LED parallel circuit 31 is configured by connecting four LED series circuits 32 composed of one LED 3a and one LED 3b in parallel, and two LED parallel circuits 31 are connected in series. Yes. The LEDs 3 a and 3 b constituting the LED series circuit 32 are mounted in a circumferential direction of a circle centering on the center of the circular mounting substrate 2. And LED3a, 3b which comprises the LED parallel circuit 31 of the front | former stage comprises an inner circle | round | yen, and LED3a, 3b which comprises the LED parallel circuit 31 of a back | latter stage comprises the outer circle | round | yen. Further, the LEDs 3a and the LEDs 3b are alternately mounted in the circumferential direction of the circle and the radial direction of the circle. Thereby, the irradiation light of LED3a and the irradiation light of LED3b are efficiently synthesize | combined, and the color nonuniformity of synthetic | combination light can be reduced.

  Moreover, in the example shown in FIG. 13, the LED parallel circuit 31 is comprised by connecting two LED series circuits 32 which consist of one LED3a and one LED3b in parallel, and four LED parallel circuits 31 are connected in series. Has been. The LEDs 3a and 3b constituting the LED series circuit 32 are mounted in a radial direction of a circle around the center of the circular mounting substrate 2. The four LED parallel circuits 31 are mounted in the circumferential direction of the circle, and the front LED 3 in each LED series circuit 32 constitutes an inner circle, and the rear LED constitutes an outer circle. Further, the LEDs 3a and the LEDs 3b are alternately mounted in the circumferential direction of the circle and the radial direction of the circle. Thereby, the irradiation light of LED3a and the irradiation light of LED3b are efficiently synthesize | combined, and the color nonuniformity of synthetic | combination light can be reduced.

  In the example shown in FIGS. 5 and 6, the anode terminal 33 and the cathode terminal 34 of the LED 3 face each other in the vertical direction, and the LED 3a and the LED 3b are alternately mounted in the left and right direction. is not. As shown in FIG. 14, a configuration in which the anode terminal 33 and the cathode terminal 34 of the LED 3 face each other in the left-right direction and the LEDs 3 a and the LEDs 3 b are alternately mounted in the left-right direction may be adopted.

  Next, FIG. 15 shows a partially enlarged view of the LED module 1 in the example shown in any of FIGS. A conductor 20b in FIG. 15 is a conductor 20 that electrically connects the LED 3a and the LED 3b constituting the LED series circuit 32. The LEDs 3a and 3b are mounted so that the direction in which the anode terminal 33 and the cathode terminal 34 face (left and right direction in FIG. 14) and the mounting direction of the LEDs 3a and 3b (left and right direction in FIG. 14) are the same. .

  The conductor 20b is formed in a rectangular shape, and a first mounting portion 21a on which the cathode terminal 34 of the LED 3a is mounted and a second mounting portion 21b on which the anode terminal 33 of the LED 3b is mounted are formed. . The first mounting portion 21a is continuously formed at the left end at the center in the vertical direction of the conductor 20b, and the second mounting portion 21b is continuously formed at the right end at the center in the vertical direction of the conductor 20b. And the 1st mounting part 21a and the 2nd mounting part 21b are spaced apart in the horizontal direction. Furthermore, the conductor 20b has a space (heat dissipating part 203) other than the space between the first mounting part 21a and the second mounting part 21b necessary for electrically connecting the LED 3a and the LED 3b. ing. That is, in the conductor 20b, the heat radiation part 203 is formed on the upper side and the lower side of the first mounting part 21a and the second mounting part 21b.

  Thus, since the conductor 20b is formed larger than a necessary area for electrically connecting the LED 3a and the LED 3b, the heat dissipation of the LED 3 can be improved.

1 LED module 3 (3a, 3b) LED
31 LED parallel circuit 32 LED series circuit 4 capacitor 5 connector

Claims (6)

An LED module having a plurality of LED series circuits composed of a plurality of LEDs connected in series, and comprising an LED parallel circuit in which the plurality of LED series circuits are connected in parallel,
The plurality of LEDs are selected from each of at least two groups among a plurality of reels and a plurality of groups corresponding one-to-one with a plurality of reels including a group of LEDs classified for each range of LED forward voltage,
The difference in the total value of the forward voltages of the plurality of LEDs constituting each of the two LED series circuits in any combination of any two LED series circuits among the plurality of LED series circuits connected in parallel Is below the threshold,
In the LED parallel circuit, the LED module includes a plurality of patterns of connection order of the plurality of LEDs constituting each of the plurality of LED series circuits . The plurality of LEDs constituting each of the LED series circuits are arranged side by side,
The LED module according to claim 1, wherein two adjacent LEDs among the plurality of LEDs are selected from different groups. The LED constituting the LED series circuit is mounted, and includes a mounting substrate having a conductor that electrically connects the LEDs constituting the LED series circuit,
The LED has an anode terminal and a cathode terminal facing in one direction,
The LEDs constituting the LED series circuit are mounted on the mounting substrate side by side in another direction orthogonal to the one direction,
The conductors that electrically connect the LEDs constituting the LED series circuit are mounted with a first mounting portion on which the cathode terminal of one of the LEDs is mounted and an anode terminal of the other LED. The LED module according to claim 1, wherein the second mounting portion is formed at a position spaced apart from both ends of the conductor in the other direction. The LED constituting the LED series circuit is mounted, and includes a mounting substrate having a conductor that electrically connects the LEDs constituting the LED series circuit,
The LED has an anode terminal and a cathode terminal facing in one direction,
The LEDs constituting the LED series circuit are mounted on the mounting substrate side by side in the one direction or another direction orthogonal to the one direction,
The conductors that electrically connect the LEDs constituting the LED series circuit are mounted with a first mounting portion on which the cathode terminal of one of the LEDs is mounted and an anode terminal of the other LED. The LED module according to claim 1, wherein the second mounting portion is formed at a position spaced apart in a direction in which the LEDs constituting the LED series circuit are arranged. The LED module according to any one of claims 1 to 4,
A lighting fixture comprising: a fixture main body to which the LED module is attached. A method of manufacturing an LED module having a plurality of LED series circuits composed of a plurality of LEDs connected in series, and comprising an LED parallel circuit in which the plurality of LED series circuits are connected in parallel,
The difference in the total value of the forward voltages of the plurality of LEDs constituting each of the two LED series circuits in any combination of any two LED series circuits among the plurality of LED series circuits connected in parallel The plurality of LEDs are at least two of a plurality of groups corresponding one-to-one with a plurality of reels including a group of LEDs classified for each range of LED forward voltage. Select from each group,
In the LED parallel circuit, the plurality of selected LEDs are mounted on a mounting substrate such that a connection order pattern of the plurality of LEDs constituting each of the plurality of LED series circuits is a plurality of patterns. The manufacturing method of the LED module.

Images