JP2020021616A - Led light emitting device and lighting unit - Google Patents

Abstract

To prevent a reduction in uniformity ratio of a luminance distribution of each of a plurality of LED modules.SOLUTION: An LED light emitting device 1 comprises: a plurality of LED modules 4; and a first input terminal 11 that is electrically connected to a positive electrode of each of the plurality of LED modules 4. The LED light emitting device 1 comprises a second input terminal 12 that is electrically connected to a negative electrode of each of the plurality of LED modules 4. Each of the plurality of LED modules 4 has a plurality of LEDs 40 that are electrically connected in series in a forward direction, and one or more current adjustment units 41 that are electrically connected in series to at least one LED 40 of the plurality of LEDs 40. The one or more current adjustment units 41 have a variable electrical resistance value. The one or more current adjustment units 41 adjust a current flowing in the plurality of LEDs 40 by changing the resistance value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an LED light emitting device and a lighting device, and more specifically, includes an LED light emitting device having a plurality of LED modules each configured by electrically connecting a plurality of LEDs in series, and the LED light emitting device. It relates to a lighting device.

  As a conventional example, a light emitting device (LED light emitting device) described in Patent Document 1 is exemplified. The conventional example includes a power supply unit that outputs a DC voltage, and a plurality of first combined light emitting device units (LED modules) that are electrically connected in parallel between output terminals of the power supply unit. Each first combined light emitting device unit includes a plurality of LEDs electrically connected in series in a forward direction, and a plurality of resistors electrically connected in parallel one by one to each LED.

  In the conventional example, when each LED is turned off, the back electromotive force applied to the LED due to external light is suppressed by the resistance, thereby preventing the LED from deteriorating.

JP 2010-205920 A

  Incidentally, each of the plurality of LEDs constituting the LED module does not necessarily have the same electrical characteristics. For example, the same DC voltage is applied to a plurality of first combined light emitting device units (LED modules) in a conventional example from a power supply unit. 1 The current flowing through the combined light emitting device unit varies. Further, even if the magnitude of the current flowing through each LED is the same, the luminous flux emitted from each LED varies. As a result, the uniformity of the luminance distribution of the LED module may be reduced.

  An object of the present invention is to provide an LED light emitting device and a lighting device that can suppress a decrease in the uniformity of the luminance distribution of each of a plurality of LED modules.

  An LED light emitting device according to one embodiment of the present invention includes a plurality of LED modules, a first input terminal electrically connected to a positive electrode of each of the plurality of LED modules, and a negative electrode of each of the plurality of LED modules. A second input terminal that is electrically connected. Each of the plurality of LED modules is electrically connected in series in a forward direction from the positive electrode to the negative electrode, and is electrically connected in parallel with at least one of the plurality of LEDs. And one or more current adjustment units. The one or more current adjusters have a variable electrical resistance, and adjust the current flowing through the at least one LED by changing the resistance.

  A lighting device according to one embodiment of the present invention includes an LED light-emitting device and a power supply device. The power supply device is electrically connected to the first input terminal and the second input terminal of the LED light emitting device, and supplies DC power to the LED light emitting device from the first input terminal and the second input terminal. .

  The LED light emitting device and the lighting device of the present invention have an effect that a reduction in the uniformity of the luminance distribution of each of the plurality of LED modules can be suppressed.

FIG. 1 is a circuit block diagram of an LED light emitting device and a lighting device according to an embodiment of the present invention. FIG. 2 is a circuit block diagram of a first modification of the LED light emitting device according to the first embodiment. FIG. 3 is a circuit block diagram of Modification 2 of the LED light emitting device according to the first embodiment. FIG. 4 is a circuit block diagram of Modification 3 of the LED light emitting device of the above. FIG. 5 is a circuit block diagram of Modification 4 of the LED light emitting device of the above. FIG. 6 is an exploded perspective view of a modification of the above lighting device.

  Hereinafter, an LED light emitting device and a lighting device according to an embodiment of the present invention will be described in detail with reference to the drawings. However, each drawing described in the following embodiment is a schematic drawing, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configurations described in the following embodiments are merely examples of the present invention. The present invention is not limited to the following embodiments, and various changes can be made according to the design and the like as long as the effects of the present invention can be achieved.

  The illumination device 3 of the embodiment includes the LED light emitting device 1 of the embodiment and a power supply device 2 as shown in FIG. The power supply device 2 converts AC power supplied from the AC power supply 9 into DC power and outputs the DC power. For example, the power supply device 2 includes a power factor improvement circuit (boost chopper circuit) that boosts an AC voltage input from the AC power supply 9 to improve a power factor, and a step-down voltage that reduces a DC voltage output from the power factor improvement circuit. It is preferable to have a chopper circuit. However, the power factor improving circuit and the step-down chopper circuit are not essential components of the power supply device 2. The power supply device 2 may include a full-wave rectifier and a smoothing capacitor instead of the power factor correction circuit. The power supply device 2 may include a switching power supply circuit other than the step-down chopper circuit such as a step-up / step-down chopper circuit or a series regulator instead of the step-down chopper circuit. The power supply device 2 performs a constant current operation.

  The LED light emitting device 1 is electrically connected to a first input terminal 11 electrically connected to a positive output terminal (not shown) of the power supply device 2 and electrically connected to a negative output terminal (not shown) of the power supply device 2. And a second input terminal 12. Further, the LED light emitting device 1 includes a plurality (three in the illustrated example) of LED modules 4. The positive electrodes of these three LED modules 4 are electrically connected to the first input terminal 11. The negative electrodes of these three LED modules 4 are electrically connected to the second input terminal 12. In the following description, the three LED modules 4 may be referred to as a first LED module 4A, a second LED module 4B, and a third LED module 4C.

  Each LED module 4 has a plurality of (six in the illustrated example) LEDs (Light Emitting Diodes) 40 and a plurality of (six in the illustrated example) current adjustment units 41. The LED 40 is, for example, a white LED for illumination. Note that the positive electrode of the LED module 4 is the anode of the LED 40 located at the rear end (uppermost in FIG. 1) in the forward direction among the six LEDs 40 connected in series. Further, the negative electrode of the LED module 4 is the cathode of the LED 40 located at the head in the forward direction (lowest in FIG. 1) among the six LEDs 40 connected in series.

  The current adjustment unit 41 is a variable resistor (potentiometer). However, the current adjusting unit 41 may be a semi-fixed resistor (trimmer potentiometer) or a digital potentiometer. Alternatively, the current adjusting unit 41 includes a plurality of fixed resistors electrically connected in parallel, and a switch that opens and closes an electric path to one or more fixed resistors of the plurality of fixed resistors. The resistance value of the combined resistance of the plurality of fixed resistors may be switched according to the opening and closing. Further, the current adjusting unit 41 may be a transistor amplifier circuit using a bipolar transistor or a field effect transistor.

  Each of the plurality of current adjustment units 41 is electrically connected to the plurality of LEDs 40 one by one. When each current adjustment unit 41 is a variable resistor or a semi-fixed resistor, each current adjustment unit 41 is mounted on one or more substrates different from a substrate (not shown) on which the LEDs 40 are mounted, and It is preferable to be electrically connected to each LED 40 via a cable. However, when each of the current adjustment units 41 is a semi-fixed resistor or a digital potentiometer, the current adjustment unit 41 may be mounted on the surface of the substrate on which the LEDs 40 are mounted, on the side opposite to the surface on which the LEDs 40 are mounted.

  Here, it is preferable that the upper limit value of the resistance value of the current adjustment unit 41 is 50 times or more the resistance value of the electrical resistance component of the LED 40 electrically connected in parallel with the current adjustment unit 41. For example, when the rated value of the forward voltage of the LED 40 is 3 V and the rated value of the forward current is 65 mA, the upper limit of the resistance value of the current adjusting unit 41 is about 2.3 kΩ. Therefore, it is preferable that the current adjustment unit 41 can adjust the resistance value in the range of 0Ω to 2.5 kΩ. The resistance value of the current adjustment unit 41 is set to the upper limit in the initial state.

  Due to variations in the electrical characteristics of LEDs during manufacturing, even if currents of the same magnitude flow, the potential difference (forward voltage) generated between the anode and cathode of the LED is not always equal. Therefore, in order to balance the voltage of each LED module 4 so as to be constant, more current flows through the LED module 4 having a low forward voltage and the voltage rises. Further, a smaller current flows through the LED module 4 having a high forward voltage, and the voltage drops. As a result, the luminous flux of the LED module 4 through which more current flows increases, and the luminous flux of the LED module 4 through which less current flows decreases. Therefore, the variation of the luminous flux among the plurality of LED modules 4 becomes large, so that the uniformity is reduced.

  For example, when the forward voltage of the first LED module 4A is higher than the forward voltage of the second LED module 4B and the forward voltage of the third LED module 4C, the current flowing through the first LED module 4A remains unchanged. And the luminous flux is reduced. Here, among the six LEDs 40 constituting the first LED module 4A, the resistance value of the current adjusting unit 41 connected in parallel to the LED 40 closest to the input terminal 11 is reduced, and the LED 40 closest to the input terminal 11 is reduced. Lower the forward voltage. Then, the forward voltage between the three LED modules 4A, 4B, and 4C can be adjusted, and variation in the current flowing through each of the LED modules 4A, 4B, and 4C can be suppressed. Since the light output of the LED 40 whose forward voltage has been adjusted is reduced, it is preferable that the LED 40 whose forward voltage is adjusted be installed in an inconspicuous place such as a peripheral portion of the lighting device 3. However, a plurality of LEDs 40 for adjusting the forward voltage may be used.

  Due to manufacturing variations in the optical characteristics of the LEDs 40, the luminous flux emitted from each LED 40 is not necessarily the same even if the magnitude of the current flowing through each LED 40 is equal. Therefore, one or more LEDs 40 having a large light output among the six LEDs 40 of the first LED module 4A are selected, and the resistance value of the current adjusting unit 41 connected in parallel with the selected one or more LEDs 40 is adjusted. do it. This makes it possible not only to adjust the forward voltage of the LED module 4 but also to suppress the light output of the LED 40 having a large luminous flux. In other words, it is possible to suppress not only the luminous flux variation between the LED modules 4A, 4B, 4C, but also the luminous flux variation between the LEDs 40 in the first LED module 4A.

  In the LED light emitting device 1 according to the present embodiment, even when LEDs 40 having different forward voltages are mixed, it is possible to suppress a decrease in the uniformity of the luminance distribution of each LED module 4, so that the forward voltage falls within a predetermined range. The manufacturing cost can be reduced as compared with the case where the LEDs 40 having the same forward voltage rank are arranged.

  Note that the adjustment operation of the current adjustment unit 41 is preferably performed in a manufacturing process of the LED light emitting device 1. That is, the forward voltage of each LED 40 may be measured when the LED light emitting device 1 is manufactured, and the forward voltage of the predetermined LED 40 may be adjusted so that the forward voltage of each LED module 4 becomes the same.

  Here, in the LED light emitting device 1 of the embodiment, the current adjusting unit 41 adjusts the current flowing through the LED 40, so that the LED light emitting device 1 can be dimmed. That is, in the LED light emitting device 1, it is possible to adjust the brightness by increasing or decreasing the brightness (luminous flux) of each LED module 4 without changing the output current I1 of the power supply device 2. As a result, since the power supply device 2 does not require a circuit configuration for realizing the dimming function, the cost of the power supply device 2 and the lighting device 3 can be reduced.

  Next, some modified examples of the LED light emitting device 1 of the embodiment will be described. As shown in FIG. 2, in the LED light emitting device 1 of the first modification, a plurality of (three in the illustrated example) LEDs 40 electrically connected in series are electrically connected in parallel to one current adjustment unit 41. It is connected. That is, in the LED light emitting device 1 of the first modification, the number of the current adjusting units 41 included in each LED module 4 is smaller than the number of the LEDs 40. The LED light emitting device 1 of the first modification cannot adjust the luminous flux of each LED 40 independently, but can adjust the luminous flux for each of the three LEDs 40 collectively. As a result, the LED light emitting device 1 of the first modification can simplify the adjustment operation of the current adjustment unit 41 and reduce the manufacturing cost by reducing the number of the current adjustment units 41.

  As shown in FIG. 3, in the LED light emitting device 1 of the second modification, in each of the LED modules 4, only one of the six LEDs 40, which is closer to the positive electrode, of the six LEDs 40 is provided with one current adjustment unit 41. They are electrically connected in parallel. The three LEDs 40 closer to the positive electrode (first LED 40) do not have the same forward voltage, and the three LEDs 40 closer to the negative electrode (second LED 40) have the same forward voltage. Of rank. Here, three second LEDs 40 may be arranged on the first input terminal 11 side with respect to the three first LEDs 40. Therefore, the LED light emitting device 1 of the second modification can simplify the adjustment work of the current adjustment unit 41 and adjust the current by making it possible to adjust only the forward voltage of the second LED 40 which is likely to be adjusted. By reducing the number of the adjusting units 41, the manufacturing cost can be reduced.

  In the LED light emitting device 1 of the third modification, as shown in FIG. 4, one first current limiting part 42 is inserted between the positive electrode of each LED module 4 and the first input terminal 11. That is, one end of each of the three first current limiting portions 42 is electrically connected to the first input terminal 11 in parallel. Further, the other end of each first current limiter 42 is electrically connected to the positive electrode of one of the three LED modules 4.

  These three first current limiters 42 are, for example, variable resistors. However, the first current limiter 42 may be a semi-fixed resistor or a digital potentiometer. Alternatively, the first current limiter 42 includes a plurality of fixed resistors electrically connected in parallel, and a switch that opens and closes an electric path to one or more fixed resistors among the plurality of fixed resistors, The resistance value of the combined resistance of the plurality of fixed resistors may be switched according to the opening and closing of the switch. Further, the first current limiter 42 may be a transistor amplifier circuit using a bipolar transistor or a field effect transistor. Note that the upper limit value of the resistance value of the first current limiter 42 is 3 which is the combined resistance value of the electrical resistance components of the plurality of (six) LEDs 40 electrically connected in series with the first current limiter 42. It is preferably at least twice (for example, 46Ω × 6 × 3 = 826Ω).

  In the LED light emitting device 1 of the third modification, the forward currents IA, IB, and IC flowing through each LED module 4 can be individually adjusted by increasing and decreasing the resistance value of each first current limiter 42. For example, the six LEDs 40 of the first LED module 4A are the first LEDs 40, and the six LEDs 40 of the second LED module 4B and the six LEDs 40 of the third LED module 4C are the second LEDs 40. Suppose there is. In this case, changing the resistance value of the first current limiter 42 is better than adjusting the forward current of the twelve LEDs 40 of the second LED module 4B and the third LED module 4C by the current adjuster 41. Can be simplified. Note that the power supply device 2 may perform a constant voltage operation.

  As shown in FIG. 5, the LED light emitting device 1 of the fourth modification is different from the LED light emitting device 1 of the third modification in that the LED light emitting device 1 is electrically connected between the first input terminal 11 and the second input terminal 12. A two-current limiting part 43 is provided. In the second current limiter 43, a part of the output current I1 of the power supply device 2 flows. Then, the magnitude of the current flowing through the second current limiter 43 increases as the resistance value of the second current limiter 43 decreases.

  The second current limiter 43 is, for example, a variable resistor. However, the second current limiter 43 may be a semi-fixed resistor or a digital potentiometer. Alternatively, the second current limiter 43 includes a plurality of fixed resistors electrically connected in parallel, and a switch that opens and closes an electric path to one or more fixed resistors of the plurality of fixed resistors, The resistance value of the combined resistance of the plurality of fixed resistors may be switched according to the opening and closing of the switch. Further, the second current limiter 43 may be a transistor amplifier circuit using a bipolar transistor or a field effect transistor. Note that the lower limit value of the resistance value of the second current limiter 43 is the combined resistance value of the electrical resistance components of the plurality of (three) LED modules 4 electrically connected in parallel with the second current limiter 43. 50 times (276Ω ÷ 3 × 50 = 460Ω) or more.

  The LED light emitting device 1 of Modification 4 increases or decreases the resistance value of the second current limiter 43 so that the output current I1 of the power supply device 2 is not changed and the forward currents IA, IB, ICs can be adjusted collectively. That is, the LED light emitting device 1 of Modification 4 can easily adjust the light by changing the light flux of the three LED modules 4 by increasing or decreasing the resistance value of the second current limiter 43. Note that the power supply device 2 may perform a constant voltage operation.

  Here, in the LED light emitting devices 1 of the embodiment and the modified examples 1 to 4, at least one of the plurality of LED modules 4 may have two or more types of LEDs 40 having different light source colors. Absent. For example, it is preferable that each LED module 4 includes a light bulb color LED 40 having a correlated color temperature of 2600K to 3250K and a daylight LED 40 having a correlated color temperature of 5700K to 7100K. Alternatively, each LED module 4 preferably includes a red LED 40, a green LED, and a blue LED 40. When one LED module 4 includes two types of LEDs 40 having different light source colors, the current flowing through each LED 40 is adjusted by the current adjusting unit 41, the first current limiting unit 42, or the second current limiting unit 43. The LED light emitting device 1 can be dimmed and toned.

  Next, a modified example of the lighting device 3 of the embodiment will be described. As shown in FIG. 6, the illumination device 3 of the modified example is a lighting device which is detachably attached to a hooking ceiling and arranged on a ceiling, and is a lighting device generally called a ceiling light. However, the lighting device 3 is not limited to a ceiling light. For example, the lighting device 3 may be an indicator light for displaying a guide sign or the like.

  The illumination device 3 of the modification includes four LED modules 4 included in the LED light emitting device 1, a power supply device (not shown), a main body 30, a power supply unit 31, a light distribution panel 32, a cover 33, and the like. The main body 30 is formed in a disk shape by a metal plate material. The power supply unit 31 is arranged at a central portion of the main body 30. The power supply unit 31 is electrically and mechanically detachably connected to the hooking ceiling. In the LED module 4, a plurality of LEDs 40 are mounted in two rows in an arc shape on a surface (lower surface) of a mounting substrate 44 which is curved in an arc shape. These four LED modules 4 are attached to the lower surface of the main body 30 side by side in the circumferential direction around the power supply unit 31.

  The light distribution panel 32 is formed in an annular shape with a light-transmitting synthetic resin such as an acrylic resin or a polycarbonate resin. The light distribution panel 32 is fixed to the main body 30 so as to cover the lower surfaces of the four LED modules 4. An optical component (lens) 320 for controlling the light distribution of the light emitted from the LEDs 40 is formed integrally with a portion of the light distribution panel 32 facing each LED 40.

  The cover 33 is formed of a translucent synthetic resin such as an acrylic resin or a polycarbonate resin into a flat cylindrical shape having an open upper surface. The cover 33 is detachably attached to the lower surface of the main body 30 so as to house the LED module 4 and the light distribution panel 32 therein. In addition, the power supply device is disposed around the power supply unit 31 on the upper surface side of the main body 30.

  As described above, the LED light emitting device (1) according to the first embodiment includes a plurality of LED modules (4) and a first input terminal () electrically connected to the positive electrode of each of the plurality of LED modules (4). 11). An LED light emitting device (1) according to a first aspect includes a second input terminal (12) that is electrically connected to a negative electrode of each of a plurality of LED modules (4). Each of the plurality of LED modules (4) includes a plurality of LEDs (40) electrically connected in series along a forward direction from the positive electrode to the negative electrode, and at least one of the plurality of LEDs (40). It has one or more current adjusters (41) electrically connected in parallel with the LED (40). The one or more current adjusters (41) have variable electric resistance values. One or more current adjusters (41) adjust a current flowing through at least one LED (40) by changing a resistance value.

  The LED light emitting device (1) according to the first aspect adjusts the current flowing through the LED (40) by the current adjusting unit (41), thereby obtaining the uniformity of the luminance distribution of each of the plurality of LED modules (4). The decrease can be suppressed.

  The LED light emitting device (1) according to the second aspect can be realized by a combination with the first aspect. In the LED light emitting device (1) according to the second aspect, each of the plurality of LED modules (4) preferably includes a plurality of current adjusting units (41). It is preferable that each of the plurality of current adjustment units (41) is provided in one-to-one correspondence with the plurality of LEDs (40).

  The LED light emitting device (1) according to the second aspect further reduces the uniformity of the luminance distribution of each of the plurality of LED modules (4) by adjusting the forward current of each of the plurality of LEDs (40) individually. Can be suppressed.

  The LED light emitting device (1) according to the third aspect can be realized by a combination with the first or second aspect. In the LED light-emitting device (1) according to the third aspect, each of the plurality of LED modules (4) includes one first current limiting portion (42) electrically connected in series with the plurality of LEDs (40). It is preferable to have each. The first current limiter (42) preferably has a variable electric resistance.

  The LED light emitting device (1) according to the third aspect increases or decreases the resistance value of the first current limiter (42), thereby changing the current (forward current IA, IB, IC) flowing through the LED module (4). Can be adjusted separately.

  The LED light emitting device (1) according to the fourth aspect can be realized by a combination with any one of the first to third aspects. In the LED light emitting device (1) according to the fourth aspect, it is preferable that one or more second current limiting portions (43) are provided between the first input terminal (11) and the second input terminal (12). . Preferably, one or more second current limiters (43) are electrically connected in parallel with the plurality of LED modules (4). The one or more second current limiters (43) preferably have a variable electrical resistance.

  The LED light emitting device (1) according to the fourth aspect can collectively adjust the current flowing through the plurality of LED modules (4) by increasing or decreasing the resistance value of the second current limiter (43). .

  The LED light emitting device (1) according to the fifth aspect can be realized by a combination with any one of the first to fourth aspects. In the LED light emitting device (1) according to the fifth aspect, the upper limit value of the resistance value of the current adjustment unit (41) is set to the value of the electric current of the LED (40) electrically connected in parallel with the current adjustment unit (41). It is preferable that the resistance is 50 times or more the resistance value of the resistance component.

  In the LED light emitting device (1) according to the fifth aspect, the current flowing to the current adjusting section (41) is made much smaller than the current flowing to the LED (40), thereby suppressing a decrease in luminous efficiency. Can be.

  The LED light emitting device (1) according to the sixth aspect can be realized by a combination with the third aspect. In the LED light emitting device (1) according to the sixth aspect, the upper limit of the resistance value of the first current limiter (42) is a plurality of LEDs electrically connected in series with the first current limiter (42). It is preferably at least three times the combined resistance value of the electric resistance component of (40).

  The LED light emitting device (1) according to the sixth aspect can lower the lower limit of the dimming range by greatly reducing the current flowing through the LED module (4).

  The LED light emitting device (1) according to the seventh aspect can be realized by a combination with the fourth aspect. In the LED light emitting device (1) according to the seventh aspect, the lower limit of the resistance value of the second current limiter (43) is a plurality of LEDs that are electrically connected in parallel with the second current limiter (43). Preferably, the resistance is 50 times or more the combined resistance value of the electric resistance component of the module (4).

  The LED light emitting device (1) according to the seventh aspect suppresses a decrease in luminous efficiency by making the current flowing through the second current limiting portion (43) significantly smaller than the current flowing through the LED module (4). Can be achieved.

  The LED light emitting device (1) according to the eighth aspect can be realized by a combination with any one of the first to seventh aspects. In the LED light emitting device (1) according to the eighth aspect, at least one of the plurality of LED modules (4) has two or more types of LEDs (40) having different light source colors. Is preferred.

  The LED light emitting device (1) according to the eighth aspect can perform not only dimming but also toning.

  A lighting device (3) according to a ninth aspect includes the LED light-emitting device (1) according to any one of the first to eighth aspects, and a power supply device (2). The power supply device (2) is electrically connected to the first input terminal (11) and the second input terminal (12) of the LED light emitting device (1), and is connected to the first input terminal (11) and the second input terminal (12). ) Is preferable to supply DC power to the LED light emitting device (1).

  The lighting device (3) according to the ninth aspect can suppress a decrease in the uniformity of the luminance distribution of each of the plurality of LED modules (4).

REFERENCE SIGNS LIST 1 LED light emitting device 2 power supply device 3 lighting device 4 LED module 11 first input terminal 12 second input terminal 40 LED
41 current adjusting part 42 first current limiting part 43 second current limiting part

Claims (9)

A plurality of LED modules;
A first input terminal electrically connected to a positive electrode of each of the plurality of LED modules;
A second input terminal electrically connected to a negative electrode of each of the plurality of LED modules;
Each of the plurality of LED modules includes:
A plurality of LEDs electrically connected in series along a forward direction from the positive electrode toward the negative electrode;
At least one LED of the plurality of LEDs is electrically connected in parallel, having one or more current adjustment units,
The one or more current adjusters have a variable electrical resistance, and adjust the current flowing through the at least one LED by changing the resistance.
LED light emitting device. Each of the plurality of LED modules includes a plurality of the current adjustment units,
Each of the plurality of current adjustment units is provided in one-to-one correspondence with the plurality of LEDs.
The LED light emitting device according to claim 1. Each of the plurality of LED modules has one first current limiting portion electrically connected in series with the plurality of LEDs,
The first current limiter has a variable electric resistance value.
The LED light emitting device according to claim 1. One or more second current limiting portions are provided between the first input terminal and the second input terminal;
The one or more second current limiters are electrically connected in parallel with the plurality of LED modules,
The one or more second current limiters have a variable electrical resistance.
The LED light emitting device according to claim 1. The upper limit value of the resistance value of the current adjustment unit is 50 times or more the resistance value of the electrical resistance component of the LED electrically connected in parallel with the current adjustment unit.
The LED light emitting device according to claim 1. An upper limit value of the resistance value of the first current limiter is at least three times a combined resistance value of electrical resistance components of the plurality of LEDs electrically connected in series with the first current limiter. ,
The LED light emitting device according to claim 3. The lower limit value of the resistance value of the second current limiter is at least 50 times the combined resistance value of the electrical resistance components of the plurality of LED modules electrically connected in parallel with the second current limiter. is there,
The LED light emitting device according to claim 4. At least one LED module of the plurality of LED modules has two or more types of LEDs (40) having different light source colors.
The LED light emitting device according to claim 1. An LED light emitting device according to any one of claims 1 to 8,
With a power supply,
The power supply device is electrically connected to the first input terminal and the second input terminal of the LED light emitting device, and supplies DC power to the LED light emitting device from the first input terminal and the second input terminal. ,
Lighting equipment.

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