JP2010258382A - Light emitting device, and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting device capable of preventing overcurrent from flowing to a light source module, and improving safety, and a lighting system. <P>SOLUTION: This light emitting device 100 including a plurality of LED modules, and a constant current circuit 71 for supplying a constant current to the plurality of LED modules is structured such that a closed circuit is formed only when a predetermined number of LED modules 10, 20, 30 are connected to a power source part 70. Since the closed circuit is not formed when the predetermined number of LED modules 10, 20, 30 are not connected, a current is not supplied to the LED modules 10, 20, 30 from the constant current circuit 71 of the power supply circuit 70. As a result, overcurrent is prevented from flowing to the LED modules 10, 20, 30, and safety can be improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light emitting device and a lighting device used for a signboard, a sign, and the like.

  Signs, signs, etc. are used in various places such as stores, buildings, public facilities, and roads. These signboards, signs, and the like are generally configured to be brightly raised using a light source so that the display can be recognized not only during the daytime but also at nighttime. Conventionally, fluorescent lamps, light bulbs, and the like have been used as such light sources, but in recent years, with the increase in luminance of light emitting diodes (hereinafter referred to as LEDs), they have characteristics such as small size, low power consumption, and long life. LEDs are used as light sources.

  Since the LED is a small light source, it can be easily arranged according to the shape of a signboard, a sign, or the like. On the other hand, when a large number of LEDs are mounted, it takes time and labor for installation and wiring. Therefore, for example, an LED module (light source module) is configured by mounting an appropriate number of LEDs on a substrate, and a plurality of LED modules are connected so that a light emitting surface can be freely formed. And the LED module comprised so that the interconnection between these LED modules is simple and can be performed easily is proposed (for example, refer patent document 1).

  The LED module disclosed in Patent Document 1 includes a board, an LED mounted on the board, a pair of input terminals provided on the board and electrically connected to both ends of the LED, and the pair of input terminals. And a feed wiring terminal having a first connection terminal and a second connection terminal. The feed wiring terminal is a pair of inputs in which the negative input terminal and the second connection terminal are provided on different substrates when the positive input terminal and the first connection terminal are connected to an external DC power supply. The terminal is configured to be electrically connectable to the input terminal on the positive electrode side and the first connection terminal.

  When connecting a plurality of LED modules in series, wiring is performed between the input terminal and the second connection terminal on the negative electrode side of one LED module and the input terminal and the first connection terminal on the positive electrode side of another LED module. At the same time, wiring is performed so as to short-circuit between the input terminal on the negative electrode side of the LED module on the most rear side and the second connection terminal. Then, the positive input terminal and the first connection terminal of the frontmost LED module are connected to an external DC power supply. On the other hand, when a plurality of LED modules are connected in parallel, wiring is performed between a pair of feed terminals of one LED module and an input terminal of another LED module. Thus, the LED module according to Patent Document 1 can be easily wired by changing the connection position of the power cable connecting the power supply device and the bundling cable connecting the LED modules.

JP 2009-44055 A

  By the way, when a plurality of LED modules are connected to the power supply device in this way, generally, a constant current circuit is provided in the power supply device or each LED module in order to keep the current supplied to the LED module constant. When each LED module is provided with a constant current circuit, a predetermined voltage is applied to the LED module by the power supply device, and a constant current flows to each LED module by the constant current circuit. At this time, an arbitrary number of LED modules can be connected within the range of the allowable output capacity of the power supply device.

  However, when the number of LED modules connected to the power supply device is determined in advance, a constant current circuit is provided in the power supply device so that a predetermined constant current is supplied to each LED module by the constant current circuit. If there is enough. By comprising in this way, an electronic component and power consumption can be reduced.

  However, in the case where the constant current circuit is provided in the power supply device as described above, when connecting a plurality of LED modules to the power supply device, the LED module described in Patent Document 1 is configured to connect a plurality of LED modules having the same shape. Since it is comprised, there exists a possibility that the number of LED modules smaller than a predetermined number may be connected accidentally. In the LED module described in Patent Document 1, a power supply path (closed circuit) is formed even when a smaller number of LED modules than the predetermined number are mistakenly connected, and each LED module has a predetermined value or more. Therefore, there is a problem in safety.

  The present invention has been made in view of such circumstances, and an overcurrent is generated in the light source module by configuring so that the current flows through the light source module only when a predetermined number of light source modules (LED modules) are connected. An object of the present invention is to provide a light-emitting device and a lighting device that can be prevented from flowing and can improve safety.

  The light emitting device according to the present invention includes a plurality of light source modules and a constant current circuit that supplies a constant current to the plurality of light source modules, and when a predetermined number of the light source modules are connected to the constant current circuit. Further, the present invention is characterized in that a closed circuit is formed.

  In the present invention, a closed circuit is formed when a predetermined number of light source modules are connected to the constant current circuit. Since a closed circuit is not formed when a predetermined number of light source modules are not connected, no current is supplied to the light source module from the constant current circuit. As a result, an overcurrent can be prevented from flowing through the light source module, and safety can be improved.

  The light emitting device according to the present invention is characterized in that the constant current circuit and the light source module are each provided with a connector, and only a predetermined connector can be connected.

  In the present invention, since the constant current circuit and the light source module are configured so that only predetermined connectors can be connected, a predetermined number of constant current circuits are connected to each other by a simple operation of connecting the connectors. The light source module can be securely attached.

  The light emitting device according to the present invention is characterized in that the connector is different in at least one of the number of terminals, the position of wired terminals, and the fitting shape.

  In the present invention, at least one of the number of terminals, the position of the wired terminal, and the fitting shape is made different so that only predetermined connectors can be connected. . Thereby, a predetermined number of light source modules can be reliably attached to the constant current circuit with a simple configuration.

  The light emitting device according to the present invention includes a power supply unit having the constant current circuit, and the power supply unit limits a voltage applied to the light source module.

  In the present invention, since the power supply unit is configured to limit the voltage applied to the light source module, for example, by setting the limiting voltage value according to the upper limit value of the driving current of the light source, Even at times, it is possible to prevent an overcurrent from flowing through the light source module and to improve safety.

  In the light emitting device according to the present invention, the light source module includes an LED.

  In the present invention, the light source module includes an LED, and the LED has low power consumption and a long life, so that it is possible to save power and increase the life of the light emitting device.

  An illumination device according to the present invention includes the light-emitting device according to the above-described invention.

  In this invention, since the illuminating device is comprised using the said light-emitting device, the safety | security of an illuminating device can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that overcurrent flows into a light source module (LED module), and can improve safety | security.

It is a block diagram which shows schematic structure of the light-emitting device which concerns on Embodiment 1 of this invention. It is a figure which shows the output characteristic of LED. It is a block diagram which shows schematic structure of the light-emitting device which concerns on Embodiment 2 of this invention. It is an external appearance perspective view of a signboard provided with the illuminating device which concerns on this invention.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a light emitting device according to Embodiment 1 of the present invention. The light emitting device 100 according to the present invention includes a first LED module 10, a second LED module 20, a third LED module 30 which are a predetermined number (three in this embodiment) of light source modules, and these And a power supply unit 70 having a constant current circuit for supplying a constant current to the LED modules 10, 20, 30.

  The first LED module 10 is mounted on one surface of the substrate 1, and a plurality of (seven in the figure) LEDs 21, 21,..., Resistors 22 and diodes 23 are connected in series in one row. Are connected to the plurality of rows (5 rows in the figure) of the LED rows 2, 2,..., And the terminal blocks 3, 4 to which the LED rows 2, 2,. 6b.

  The substrate 1 is made of, for example, an epoxy resin and has a rectangular plate shape. Terminal blocks 3 and 4 are respectively provided along two parallel sides of the substrate 1. The terminal block 3 has an elongated rectangular plate shape, and has a plurality (three in the figure) of connection terminals 31, 32, and 33. Similarly, the terminal block 4 has an elongated rectangular plate shape, and has a plurality (three in the figure) of connection terminals 41, 42, and 43.

  One end of the LED rows 2, 2... Is connected to the connection terminal 31 of the terminal block 3 and the connection terminal 41 of the terminal block 4, respectively. The other ends of the LED rows 2, 2... Are connected to the connection terminals 42 of the terminal block 4, respectively. The LEDs 21, 21,... Are, for example, surface-mounted LEDs that include an LED element, a sealing resin in which the LED element is sealed and phosphors are dispersed, and an input terminal and an output terminal. The number of LEDs 21, 21... Connected in one row and the number of LED rows 2, 2... Are examples, and are not limited to these.

  A connector 5 a is connected to the terminal block 3. The connector 5 a is a male connector and has two connection pins 51 and 52. One connection pin 51 of the connector 5 a is connected to the connection terminal 31 of the terminal block 3. The other connection pin 52 of the connector 5 a is connected to the connection terminal 33 of the terminal block 3.

  On the other hand, a connector 6 b is connected to the terminal block 4. The connector 6b is a female connector and has three pin holes 66, 67, and 68. One pin hole 66 of the connector 6 b is connected to the connection terminal 41 of the terminal block 4. The pin hole 67 of the connector 6b is connected to the connection terminal 42, and the pin hole 68 is connected to the connection terminal 43, respectively.

  Contact points 11, 12 are provided between the connection terminal 32 of the terminal block 3 and the other ends of the LED rows 2, 2..., And the contact points 11, 12 are not connected. Further, contacts 13 and 14 are provided between the connection terminal 42 of the terminal block 4 and the other ends of the LED rows 2, 2... And between the connection terminal 43 of the terminal block 4 and the connection terminal 33 of the terminal block 3. It is provided. These contacts 13 and 14 are not connected.

  Unlike the first LED module 10, the second LED module 20 has a connector 6 a connected to the terminal block 3 and a connector 6 a connected to the terminal block 4.

  The connector 6 a connected to the terminal block 3 is a male connector and has three connection pins 61, 62, 63. One connection pin 61 of the connector 6 a is connected to the connection terminal 31 of the terminal block 3. The connection pin 62 of the connector 6 a is connected to the connection terminal 32 of the terminal block 3, and the connection pin 63 is connected to the connection terminal 33 of the terminal block 3.

  On the other hand, one connection pin 61 of the connector 6 a connected to the terminal block 4 is connected to the connection terminal 41 of the terminal block 4. The connection pin 62 of the connector 6 a is connected to the connection terminal 42 of the terminal block 4, and the connection pin 63 is connected to the connection terminal 43 of the terminal block 4. In the second module 20, the contacts 11 and 12 are connected and the contacts 13 and 14 are not connected. Since other configurations are the same as those of the first module 10, the same reference numerals are assigned to corresponding components, and detailed description of the configurations is omitted.

  Unlike the second LED module 20, the third LED module 30 has a connector 6 b connected to the terminal block 3 and no connector connected to the terminal block 4.

  In the third module 30, the contacts 11, 12 and the contacts 13, 14 are connected together. Since other configurations are the same as those of the second module 20, the same reference numerals are assigned to corresponding components, and detailed description of the configurations is omitted.

  The power supply unit 70 includes a constant current circuit 71 that supplies a constant current to the LED modules 10, 20, and 30, a voltage limiting circuit 72 that limits a voltage applied to the LED modules 10, 20, and 30, and a connector 5b. I have.

  The constant current circuit 71 is composed of, for example, a variable three-terminal regulator IC and a resistor, and the resistance value of the resistor is controlled by controlling the voltage between the output terminal and the adjustment terminal of the variable three-terminal regulator IC to be constant. The output current is adjusted so as to be a constant current value according to the above. The voltage limiting circuit 72 is configured to detect the output voltage and adjust the detected value to be equal to or lower than a predetermined voltage.

  FIG. 2 is a diagram illustrating the output characteristics of the LED. The horizontal axis in FIG. 2 represents the forward voltage Vf, and the vertical axis represents the forward current If. As shown in the figure, the forward voltage Vf of LED and the forward current If have a proportional relationship. The above-mentioned predetermined voltage is determined by multiplying the limit voltage VL obtained according to the upper limit value of the LED drive current by the number of LEDs connected in series, and taking into account the voltage drop of the resistor 22 and the diode 23. . Thereby, it can prevent that overcurrent flows into LED module 10,20,30 also at the time of abnormality, and can improve safety | security.

  The connector 5b is a female connector and has two pin holes 56 and 57. One pin hole 56 of the connector 5 b is connected to the constant current circuit 71. The other pin hole 57 is connected to the voltage limiting circuit 72.

  In the connector 5b of the power supply unit 70, the connector 5a connected to the terminal block 3 of the first module 10 fits the connection pins 51 and 52 of the connector 5a into the pin holes 56 and 57 of the connector 5b. Connected. Note that the sockets 6a and 6b of the other modules 20 and 30 cannot be connected to the connector 5b of the power supply unit 70 because the number of terminals is different.

  Similarly, the connector 6b connected to the terminal block 4 of the first module 10 has the connector 6a connected to the terminal block 3 of the second module 20 connected to the pin holes 66, 67, 68 of the connector 6b. The connection pins 61, 62, 63 of 6a are connected by fitting. The connector 6b, which is a female connector connected to the terminal block 4 of the first module 10, does not have a shape in which the fitting shape of the terminal can be connected to the socket 6b, which is a female connector of the third module 30. It is impossible to connect from

  Similarly, the connector 6a connected to the terminal block 4 of the third module 30 is connected to the pin holes 66, 67, 68 of the connector 6b. The connection pins 61, 62, 63 of 6a are connected by fitting. In a state where the third LED module 30 is not connected, a path through which the current supplied to the LED rows 2, 2... Circulates is not formed, and no current is supplied from the power supply unit 70.

  As described above, when a predetermined number of three LED modules 10, 20, and 30 are connected to the power supply unit 70 having the constant current circuit 71 in this order, a closed circuit is formed as shown in FIG. It is formed. As the power is turned on, a constant current is supplied from the constant current circuit 71 of the power supply unit 70 to the LED rows 2, 2,... Of the LED modules 10, 20, 30 connected in parallel. As a result, the LEDs 21, 21... Are stably lit with substantially the same brightness.

  In the light emitting device 100 according to the present embodiment configured as described above, as described above, a predetermined number of the first LED module 10, the second LED module 20, and the third LED module 30 are in order. Only when three LED modules 10, 20, and 30 are connected to the power supply unit 70, a closed circuit is formed. When the predetermined number of LED modules 10, 20, 30 are not connected, a closed circuit is not formed, so that no current is supplied to the LED modules 10, 20, 30 from the constant current circuit 71 of the power supply unit 70. As a result, it is possible to prevent an overcurrent from flowing through the LED modules 10, 20, and 30, and improve safety.

  Further, since the power supply unit 70 and the LED modules 10, 20, and 30 are configured so that only predetermined connectors can be electrically connected to each other, the constant current circuit 71 can be obtained by a simple operation of connecting the connectors. A predetermined number of LED modules 10, 20, and 30 can be reliably attached to the. And, since it is configured so that only predetermined connectors can be electrically connected by changing at least one of the number of terminals, the position of the wired terminal, and the fitting shape, A predetermined number of LED modules 10, 20, and 30 can be reliably attached to the constant current circuit 71 with a simple configuration. In addition, since the constant current circuit 71 is provided only in the power supply unit 70, electronic components and power consumption can be reduced.

  Further, since the voltage limiting circuit 72 that limits the voltage applied to the LED modules 10, 20, and 30 is provided in the power supply unit 70, by setting the limiting voltage value according to the upper limit value of the driving current of the LED 21, Even when an abnormality occurs, it is possible to prevent an overcurrent from flowing through the LED modules 10, 20, and 30 and improve safety.

  Further, since an LED is used as the light source, and the LED has low power consumption and a long life, the power saving and long life of the light emitting device 100 can be achieved.

(Embodiment 2)
FIG. 3 is a block diagram showing a schematic configuration of the light emitting apparatus according to Embodiment 2 of the present invention. The light emitting device 100a according to the present invention includes a first LED module 10a, a second LED module 20a, a third LED module 30a, which are a predetermined number (three in the present embodiment) of light source modules, and these And a power supply unit 70a having a constant current circuit for supplying a constant current to the LED modules 10a, 20a and 30a. The light emitting device 100a according to the second embodiment has a connector configuration different from that of the light emitting device 100 according to the first embodiment, as will be described below.

  The first LED module 10a is mounted on one surface of the substrate 1, and a plurality of (seven in the figure) LEDs 21, 21,..., Resistors 22 and diodes 23 are connected in series in one row. The plurality of rows (5 rows in the figure) of the LED rows 2, 2..., The terminal blocks 3a, 4a to which the LED rows 2, 2... Are connected, and the connectors 8a to be connected to the terminal blocks 3a, 4a, respectively. 8b.

  The terminal block 3a has an elongated rectangular plate shape, and has a plurality (four in the figure) of connection terminals 31, 32, 33, and 34. Similarly, the terminal block 4a has an elongated rectangular plate shape, and has a plurality (four in the figure) of connection terminals 41, 42, 43, and 44.

  One end of the LED rows 2, 2... Is connected to the connection terminal 31 of the terminal block 3a and the connection terminal 41 of the terminal block 4, respectively. The other ends of the LED rows 2, 2,... Are connected to the connection terminal 32 of the terminal block 3a and the connection terminal 42 of the terminal block 4a, respectively.

  A connector 8a is connected to the terminal block 3a. The connector 8a is a male connector and has four connection pins 81, 82, 83, and 84. One connection pin 81 of the connector 8a is connected to the connection terminal 31 of the terminal block 3a. The connection pin 84 of the connector 8a is connected to the connection terminal 34 of the terminal block 3a.

  On the other hand, a connector 8b is connected to the terminal block 4a. The connector 8b is a female connector and has four pin holes 86, 87, 88, 89. One pin hole 86 of the connector 8b is connected to the connection terminal 41 of the terminal block 4a. The pin hole 87 of the connector 8b is connected to the connection terminal 42, and the pin hole 88 is connected to the connection terminal 43.

  Contacts 15, 16 are provided between the connection terminal 34, the connection terminal 33, and the connection terminal 43 of the terminal block 3 a, and the contacts 15, 16 are connected. The contact points 13 and 14 between the connection terminal 43 of the terminal block 4a and the connection terminal 33 of the terminal block 3a are not connected.

  Unlike the first LED module 10a, the second LED module 20a has connectors 8a connected to the terminal block 3a and the terminal block 4a, respectively.

  One connection pin 81 of the connector 8a connected to the terminal block 3a is connected to the connection terminal 31 of the terminal block 3a. The connection pin 82 of the connector 8a is connected to the connection terminal 32 of the terminal block 3a, and the connection pin 83 is connected to the connection terminal 33 of the terminal block 3a.

  On the other hand, one connection pin 81 of the connector 8a connected to the terminal block 4a is connected to the connection terminal 41 of the terminal block 4a. The connection pin 82 of the connector 8a is connected to the connection terminal 42 of the terminal block 4a, and the connection pin 83 is connected to the connection terminal 43 of the terminal block 4a. Further, in the second module 20a, the contact points 13 and 14 and the contact points 15 and 16 are not connected. Since the other configuration is the same as that of the first module 10a, the same reference numerals are assigned to the corresponding structural members, and detailed description of the configuration is omitted.

  Unlike the second LED module 20a, the third LED module 30a has a connector 8b connected to the terminal block 3a and no connector connected to the terminal block 4a.

  Further, in the third module 30a, the contacts 13 and 14 are connected. Since the other configuration is the same as that of the second module 20a, the same reference numerals are assigned to the corresponding structural members, and detailed description of the configuration is omitted.

  Unlike the power supply unit 70 of the light emitting device 100 according to Embodiment 1, the power supply unit 70a includes a connector 8b having four pin holes 86, 87, 88, and 89. One pin hole 86 of the connector 8 b is connected to the constant current circuit 71, and the pin hole 89 is connected to the voltage limiting circuit 72. Since the other configuration is the same as that of the first embodiment shown in FIG. 1, the same reference numerals as those in FIG. 1 are attached to the corresponding structural members, and detailed description of the configuration is omitted.

  In the connector 8b of the power supply unit 70a, the connector 8a connected to the terminal block 3a of the first module 10a is connected to the pin holes 86, 87, 88, 89 of the connector 8b and the connection pins 81, 82, 83 of the connector 8a. , 84 are connected by fitting. It should be noted that the socket 8b of the third module 30 cannot be connected to the connector 8b of the power supply unit 70a because the fitting shape of the terminals is not a shape that can be won continuously. Further, the socket 8a of the second module 20a can be connected itself, but the position of the wired terminal, in other words, the position of the terminal that is effective for connection is different (the connector 8b of the power supply unit 70a The connection pin 84 of the socket 8a of the second module 20a corresponding to the pin hole 89 is not wired), so that a path through which the current supplied to the LED rows 2, 2,... No current is supplied.

  Similarly, the connector 8b connected to the terminal block 3a of the second module 20a is coupled to the connector 8b connected to the terminal block 4a of the first module 10a. The connector 8b, which is a female connector connected to the terminal block 4a of the first module 10a, does not have a shape in which the socket 8b, which is a female connector of the third module 30a, can be coupled. It is impossible to connect from

  Similarly, the connector 8b connected to the terminal block 3a of the third module 30a is coupled to the connector 8a connected to the terminal block 4a of the second module 20a. In a state where the third LED module 30a is not connected, a path through which the current supplied to the LED rows 2, 2,... Is not formed is not supplied from the power supply unit 70a.

  As described above, when a predetermined number of three LED modules 10a, 20a, and 30a are connected to the power supply unit 70a having the constant current circuit 71 in this order, a closed circuit is formed as shown in FIG. It is formed. In the light emitting device 100a according to the second embodiment configured as described above, the number of terminals of the connector to be used is the same, and the positions of the wired terminals, in other words, the positions of the terminals effective for connection are different. Therefore, in addition to the effects described in the first embodiment, the types of parts can be reduced, and manufacturing and parts management can be made efficient.

  The light emitting devices 100 and 100a configured as described above can be used for lighting devices that illuminate displays such as signs and signs, and lighting devices that illuminate indoor and outdoor spaces. An example applied to an illumination device for a signboard will be described. FIG. 4 is an external perspective view of a signboard provided with the illumination device according to the present invention. The signboard shown in FIG. 4 is an example of an internally illuminated signboard in which a light source is placed on the back surface of a light-transmitting material and illuminated from the back surface to brighten the display.

  The signboard 200 includes a casing 90 having a single-side opening having a thin rectangular parallelepiped outer shape, and an acrylic plate 91 as a translucent material covering the opening of the casing 90. The housing 90 is configured so that it can be attached to the outer wall of a building such as a store. Inside, the above-described light emitting device is attached so that the surface on which the LED of the substrate is mounted faces the opening side. Characters, symbols, figures, patterns, or the like are drawn on the acrylic plate 91 that covers the opening of the housing 90. By turning on the light emitting device configured as an illuminating device that emits light from the acrylic plate 91 in this way, the entire acrylic plate 91 emits light uniformly with a required brightness. Since the lighting device is configured using the light emitting device, the safety of the lighting device can be improved as described above.

  In the above embodiment, the case where the predetermined number of LED modules connected to the constant current circuit is 3 has been described. However, the predetermined number is not limited to this, and in the case of 4 or more, for example, a terminal The same configuration can be achieved by increasing the number of In addition, by configuring at least one of the number of terminals, the position of the wired terminals, and the fitting shape, the circuit is configured to be a closed circuit when a predetermined number of LED modules are connected to the constant current circuit. The combination of the number of these terminals, the positions of the wired terminals, and the fitting shape is not limited to the embodiment.

  Moreover, in the above embodiment, although the male connector which has a connection pin and the female connector which has a pin hole are used as a connector, the shape of a connector is not limited to this. For example, the terminal portions may have the same shape having contact surfaces that can contact each other, and the shapes of the connecting portions may be different.

  In the above embodiment, an LED is used as a light source. However, the present invention is not limited to this, and other light-emitting elements such as EL (Electro Luminescence), fluorescent lamps, light bulbs, and the like may be used.

  Moreover, in the above embodiment, although the case where the light-emitting device was applied to a signboard was illustrated, the light-emitting device according to the present invention is not limited to the signboard, but a sign, a display board, an indoor / outdoor space The present invention can be applied to any lighting device having a planar light emitting portion, such as a lighting fixture that illuminates the lamp. Furthermore, it goes without saying that the present invention can be implemented in variously modified forms within the scope of the matters described in the claims.

5a, 5b, 6a, 6b, 8a, 8b Connector 10, 10a, 20, 20a, 30, 30a LED module (light source module)
21 LED
70, 70a Power supply unit 71 Constant current circuit 72 Voltage limiting circuit 100, 100a Light emitting device 200 Lighting device

Claims (6)

In a light-emitting device comprising a plurality of light source modules and a constant current circuit for supplying a constant current to the plurality of light source modules,
A light-emitting device configured to form a closed circuit when a predetermined number of the light source modules are connected to the constant current circuit. The constant current circuit and the light source module each have a connector,
The light emitting device according to claim 1, wherein only a predetermined connector can be connected.   The light emitting device according to claim 2, wherein the connector is different in at least one of the number of terminals, the position of the wired terminals, and the fitting shape.   The power supply unit having the constant current circuit is provided, and the power supply unit is configured to limit a voltage applied to the light source module. Light emitting device.   The light source device according to claim 1, wherein the light source module includes an LED.   An illuminating device comprising the light emitting device according to claim 1.

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