JP2011090968A - Led lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of responding in time of emergency by effectively utilizing characteristic of LEDs by lighting only the LEDs in the forward direction from a connection point, to which an auxiliary power supply is connected, from among a plurality of LEDs connected in series, by the auxiliary power supply from the outside. <P>SOLUTION: The lighting device 3 lights the LED by feeding from the auxiliary power supply 4 when feeding from a main power supply 2 is stopped. The lighting device 3 includes: a lighting part 5 which is connected to the main power supply 2 and wherein the plurality of LEDs 21 are connected in series; and an external input terminal 6 arranged at an arbitrary connecting middle point 25 between the plurality of LEDs 21 in the lighting part 5. When feeding from the main power supply 2 is stopped, the auxiliary power supply 4 is connected to the external input terminal 6 to feed, and the LEDs 21 connected in the forward direction of the external input terminal 6 out of the LEDs 21 of the lighting part 5 are lighted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an LED illumination device that lights an LED with an auxiliary power supply when power supply from a main power supply is stopped.

  In recent years, LEDs (which are acronyms of Light-Emitting Diodes, which are light emitting diodes) that can realize long-time use, energy saving, resource saving, and the like have attracted attention and are widely used as general light sources. Along with this, there has been disclosed a technique for emitting an LED with an emergency power supply when power supply from a commercial power supply is stopped due to a power failure or the like (see, for example, Patent Documents 1 to 3).

  In the technique shown in Patent Document 1, the LED lighting package operates in a normal manner in a first normal power mode in which power is supplied by a power line such as a building wiring. In this mode of operation, all 50 LEDs in 5 rows are illuminated, providing normal room ambient lighting. If normal power is lost during a power failure, the power loss is detected and the package operates in a second mode in which power is supplied by the battery. In this auxiliary battery mode, only one of the LED strings is illuminated, and emergency lighting is provided so that building occupants and the like can safely move to the exit and exit the building.

  The technique shown in Patent Document 2 includes a large number of small circuit units in which three white light emitting diodes and a current limiting resistor are connected in series so that the load is adapted to the voltage of the battery power supply. 6 sets of multiple large circuit units connected in series via backflow preventing rectifiers so that the load is adapted to the direct current output voltage of the full wave rectifier, each large circuit unit being a full wave rectifier Are connected in parallel between the two output terminals, and further, a DC24V voltage is supplied in parallel from the battery power source through the backflow preventing rectifier elements between both ends of each small circuit unit.

  The technique shown in Patent Document 3 includes at least a traffic signal for vehicles, a traffic signal for pedestrians, and traffic indication signs, and supplies power to the traffic management system in place of the commercial power source in the event of a power failure. A method for operating an emergency fuel cell power generator for a traffic management system equipped with a fuel cell power generator that operates when a commercial power supply fails and the fuel cell power generator is operated. In this case, or when the remaining fuel amount of the fuel cell becomes equal to or less than a predetermined amount, the traffic management system is operated in a power saving mode that consumes less power than during normal operation.

JP 2008-270212 A JP 2001-15278 A JP 2007-87154 A

  However, the technique shown in Patent Document 1 requires that an AC power supply and a battery be connected, which requires wiring from the battery to the LED array, and the circuit configuration becomes complicated. Have In addition, it is lit for each row of LEDs using a battery, and is not a technology for lighting only forward LEDs from an arbitrary connection midpoint of a plurality of LEDs connected in series. It is not a technology that effectively uses only the power-on function.

  In the technique shown in Patent Document 2, all light-emitting diodes are turned on regardless of whether the power source is a commercial power source or a battery power source. In the case of a battery power source, the supplied voltage value is low. Therefore, when all the light emitting diodes are turned on, there is a problem that the illuminance of each light emitting diode is lowered.

  The technique shown in Patent Document 3 is a technique related to a traffic system such as a traffic light, a sign, and the like. The application object is different from the present invention, and only forward LEDs from any connection midpoint of a plurality of LEDs connected in series. This is not a technology that effectively utilizes the function of the diode that energizes only in one direction.

  In view of this, the present invention effectively turns on the LED in the forward direction from the connection midpoint to which the auxiliary power supply is connected by using an auxiliary power supply from the outside among the plurality of LEDs connected in series. It aims at providing the illuminating device which can respond to an emergency using for.

  The illumination device disclosed in the present application is an LED illumination device that turns on an LED by power supply from an auxiliary power source when power supply from the main power source is stopped. The illumination device is connected to the main power source and a plurality of LEDs are connected in series. And an external input terminal having one end of an arbitrary connection midpoint of the plurality of LEDs in the illumination unit and the other end being a forward terminal of the plurality of LEDs, and power supply from the main power supply is stopped In this case, the auxiliary power supply is connected to the external input terminal to supply power, and among the LEDs of the illumination unit, the LEDs connected in the forward direction of the connection midpoint are turned on.

As described above, in the lighting device disclosed in the present application, when power supply from the main power supply is stopped, an arbitrary connection midpoint in the lighting unit in which a plurality of LEDs are connected in series is one end, and the forward direction of the plurality of LEDs Auxiliary power supply is connected to the external input terminal with the terminal as the other end to supply power, and among the LEDs in the lighting unit, the LEDs connected in the forward direction of the connection midpoint are turned on, so that the diode is energized only in one direction. With a simple circuit configuration that effectively utilizes the function to be performed, the LED to be turned on can be lit with sufficient illuminance even in an emergency where power supply from the main power supply is stopped.
Note that the auxiliary power supply need not always be connected to the external input terminal as long as it can be connected in an emergency.

  In the illumination device disclosed in the present application, a plurality of the illumination units are connected in parallel with the main power source, and the arbitrary connection midpoint is set as one end of an external input terminal for each of the plurality of illumination units, The LED forward terminal is the other end of the external input terminal, and the auxiliary power source is connected to the external input terminal, whereby the illumination unit and the auxiliary power source are connected in parallel. is there.

  Thus, in the illumination device disclosed in the present application, a plurality of illumination units are connected in parallel with a main power source, and the arbitrary connection midpoint is set as one end of an external input terminal for each of the plurality of illumination units, Since the forward terminal of a plurality of LEDs in each lighting unit is the other end of the external input terminal, and the auxiliary power source is connected to the external input terminal, the lighting unit and the auxiliary power source are connected in parallel. Some of the LEDs connected in series can be lit over a plurality of rows, and the minimum required illuminance and light irradiation range can be ensured even in an emergency.

  The illumination device disclosed in the present application is characterized in that the auxiliary power supply is connected in parallel via a diode and a resistor arranged outside the illumination unit for each of the plurality of illumination units. .

  As described above, in the lighting device disclosed in the present application, the auxiliary power source is connected in parallel via the diode and the resistor arranged outside the lighting unit for each of the plurality of lighting units. In addition to being able to suppress the voltage value, it is an independent circuit for each lighting unit, and even if a problem occurs in any of the lighting units, the effect of minimizing damage can be achieved. Play.

  In particular, there may be no potential difference depending on the number of LEDs and the voltage value of the main power supply, and it is very advantageous to suppress the voltage value of the main power supply. In addition, when using an auxiliary power supply, the power supply from the main power supply may have stopped due to a disaster, etc., and it is highly possible that a problem has occurred not only in the main power supply but also in the lighting section. Therefore, damage can be minimized by using an independent circuit for each illumination unit in this way.

The lighting device disclosed in the present application is an LED lighting device that switches between lighting of the LED by the main power source and lighting of the LED by the auxiliary power source using a transistor.
As described above, in the lighting device disclosed in the present application, the lighting of the LED by the main power source and the lighting of the LED by the auxiliary power source are switched using the transistor, so that it is not a complicated circuit configuration having a switching control function, There is an effect that the power supply can be switched smoothly with a simple circuit configuration.

  The illumination device disclosed in the present application is disposed in the vicinity of the external input terminal, stores at least an auxiliary LED that irradiates light to the external input terminal, and charges supplied from the main power supply, and stores the stored power And a power storage unit for supplying power to the auxiliary LED, and when the power supply from the main power supply is stopped, the power storage unit turns on the auxiliary LED.

  As described above, in the lighting device disclosed in the present application, the auxiliary LED that is disposed in the vicinity of the external input terminal and irradiates light to at least the external input terminal and the electric charge supplied from the main power supply are stored, and the electric charge is stored. Power storage means for supplying power to the auxiliary LED, and when the power supply from the main power supply stops, the auxiliary LED is turned on by the power storage means, so the auxiliary power supply and the external input terminal are not always connected. However, there is an effect that the connection operation can be performed quickly and efficiently by irradiating the external input terminal with light.

The lighting device disclosed in the present application is characterized in that the main power source is a commercial power source and the auxiliary power source is a car battery.
As described above, in the lighting device disclosed in the present application, the main power source is a commercial power source, and the auxiliary power source is an automobile battery. Therefore, even if power supply from the commercial power source is stopped due to a disaster or the like, It is possible to turn on the LED urgently using the battery. In the case of a car battery, since power can be supplied while generating power, there is an effect that it can be used for a long time.

It is a block diagram of the illumination system containing the illuminating device which concerns on 1st Embodiment. It is a figure which shows the basic circuit of the illuminating device which concerns on 1st Embodiment. It is a figure which shows the 1st circuit example of the illumination measure which concerns on 1st Embodiment. It is a figure which shows the 2nd circuit example of the illuminating device which concerns on 1st Embodiment. It is a figure which shows the circuit example of the illuminating device which concerns on 2nd Embodiment. It is a block diagram of the illumination system containing the illuminating device which concerns on 3rd Embodiment. It is a circuit diagram for lighting auxiliary LED in the illuminating device which concerns on 3rd Embodiment.

  Embodiments of the present invention will be described below. The present invention can be implemented in many different forms. Therefore, the present invention should not be construed based only on the description of this embodiment. Also, the same reference numerals are given to the same elements throughout the present embodiment.

(First embodiment of the present invention)
The lighting device according to this embodiment will be described with reference to FIGS. FIG. 1 is a configuration diagram of a lighting system including a lighting device according to the present embodiment, FIG. 2 is a diagram illustrating a basic circuit of the lighting device according to the present embodiment, and FIG. 3 is a diagram of the lighting device according to the present embodiment. FIG. 4 is a diagram illustrating a second circuit example of the lighting device according to the present embodiment.

  In FIG. 1, a lighting system 1 includes a main power source 2 that converts an AC voltage from a commercial power source into a DC voltage, an illumination device 3 that lights a plurality of LEDs using the DC voltage converted by the main power source 2, and a commercial power source. And an auxiliary power supply 4 that supplies a direct current voltage for lighting a part of the LEDs of the lighting device 3 to the lighting device 3 when the power supply is stopped.

  The illuminating device 3 is connected to the main power source 2 and includes an illuminating unit 5 formed by connecting a plurality of LEDs in series (hereinafter referred to as an LED array). An external input terminal 6 for connecting to the auxiliary power supply 4 is connected to an arbitrary connection midpoint of the LED array. The position of an arbitrary connection middle point to which the external input terminal 6 is connected is set according to the voltage value of the auxiliary power supply 4.

  The illumination unit 5 includes one or a plurality of LED strings, and when a plurality of LED strings are disposed, the LED 5 is connected in parallel to the main power supply 2 for each LED string. Each LED row is connected to the external input terminal 6 at an arbitrary connection midpoint of LEDs connected in series, and the auxiliary power supply 4 can be connected to all the LED rows.

  The auxiliary power supply 4 and the external input terminal 6 may be always connected, or may be connected only in an emergency when power supply from the commercial power supply is stopped. In the case of constant connection, the amount of power and the maintenance of the connection system are always required, and work is troublesome. Therefore, it is preferable to connect only in an emergency. In addition, a vehicle battery may be used as a specific example of the auxiliary power supply 4. By doing so, even if the power supply from the main power supply is stopped due to a disaster, etc., it becomes possible to turn on the LED urgently using the car battery, and in the case of the car battery, Since power can be supplied while it can be used for a long time.

  FIG. 2 is a basic circuit diagram of the lighting device 1, and FIG. 2A is a circuit diagram when the LED 21 is turned on by power supply from the main power supply 2, and FIG. 2B is a power supply from the main power supply 2. FIG. 6 is a circuit diagram in a case where the LED 21 is turned on by power supply from the auxiliary power supply 4 when it is stopped. Here, only one LED row is shown.

  In FIG. 2A, the illumination unit 5 is composed of an LED string 20 in which a plurality of LEDs 21 are connected in series, and the LED string 20 is connected to the main power source 2 via a resistor R1 for limiting the current value. Yes. An external input terminal 6 for connection to the auxiliary power supply 4 is connected to an arbitrary connection midpoint 25 in the LED array 20 (here, the connection midpoint of the third and fourth LEDs 21 counted from the downstream side). Are connected, and a resistor R2 for limiting the current value and a diode D1 for preventing a backflow of current are disposed between the external input terminal 6 and the LED array 20. When a DC voltage is applied from the main power supply 2, all the LEDs 21 in the LED array 20 are turned on via the resistor R1.

  Here, although the forward terminal of the LED array 20 is represented by the ground, the forward terminal of the LED array 20 is connected to the main power supply 2 and one end of the external input terminal 6 is connected to the connection middle point 25, etc. The end may be connected to a forward terminal of the LED array 20.

  In FIG. 2B, when the power supply from the main power supply 2 is stopped, the auxiliary power supply 4 is connected to the external input terminal 6, and a DC voltage is applied from the auxiliary power supply 4. When a DC voltage is applied from the auxiliary power supply 4, the three LEDs 21 in the forward direction of the connection midpoint 25 are lit through the diode D 1 and the resistor R 2. At this time, the power supply from the main power supply 2 is stopped, and the current flows through the LED 21 in the reverse direction of the connection midpoint 25 because the diode has a characteristic that current is supplied only in one direction. The LED 21 in the reverse direction of the connection midpoint 25 is not lit.

  FIG. 3 is a first circuit example of the lighting device 1, and FIG. 3A is a circuit diagram in the case where the LED 21 is turned on by power feeding from the main power source 2, and FIG. FIG. 5 is a circuit diagram when power supply is stopped and the LED 21 is turned on by power supply from the auxiliary power supply 4. Unlike the case of FIG. 2, a plurality of LED strings 20 are provided, and each LED string 20 is connected in parallel with the main power supply 2 via a resistor R1. The connection middle point 25 of each LED array 20 is connected to the external input terminal 6 for each LED array 20, and the auxiliary power supply 4 is connected to the external input terminal 6 when the power supply from the main power supply 2 is stopped. By doing so, it becomes possible to supply power to the LEDs 21 in the forward direction of the connection midpoints 25 of all the LED rows 20. By using a circuit that eliminates the intersection of wirings as shown in FIG. 3, it can be mounted on a single-sided board.

  In this case as well, the forward terminal of each LED array 20 is represented by the ground, but the forward terminal of each LED array 20 is connected to the main power supply 2 and one end of the external input terminal 6 is connected to each LED array. The connection midpoint 25 and the other end of 20 may be connected to the forward terminal of each LED row 20.

  FIG. 4 is a second circuit example of the lighting device 1, and FIG. 4A is a circuit diagram in the case where the LED 21 is turned on by power feeding from the main power source 2, and FIG. 4B is a circuit diagram from the main power source 2. FIG. 5 is a circuit diagram when power supply is stopped and the LED 21 is turned on by power supply from the auxiliary power supply 4. Unlike the case of FIG. 3, the external input terminal 6 and the connection midpoint 25 of each LED array 20 are connected in parallel via a diode D <b> 1 arranged outside the LED array 20 and a resistor R <b> 2. . When the power supply from the main power supply 2 is stopped, the auxiliary power supply 4 is connected to the external input terminal 6 so that power can be supplied to the LEDs 21 in the forward direction of the connection middle points 25 in all the LED rows 20 as shown in FIG. In the case of FIG. 4, the resistor R <b> 2 is connected to the outside of the LED array 20, so that the voltage of the main power supply 2 can be made lower than in the case of FIG. 3. Further, each LED row 20 is an independent circuit, and even when a problem occurs in one LED row 20 and the LED 21 does not turn on, the LEDs 21 of the other LED rows 20 are turned on. Damage can be minimized.

  In the circuit in the case of FIG. 3 and FIG. 4, it is assumed that 10 LED rows 20 in which 15 LEDs 21 (capacity is 50 W) are connected in series are arranged in 10 rows (that is, 15 × 10 rows = 150). LED 21 is provided) and the external input terminal 6 is connected to the connection middle point 25 between the third and fourth counters when counted from the downstream side. = 30 LEDs 21 can be turned on. By using a battery for an automobile, it is possible to supply power while generating power, and lighting for a long time is possible.

  Thus, according to the illuminating device according to the present embodiment, when power supply from the main power supply is stopped, an arbitrary connection midpoint in the illumination unit in which the plurality of LEDs are connected in series is used as one end, and the plurality of LEDs are Auxiliary power supply is connected to the external input terminal with the other end as the forward terminal to supply power, and the LEDs connected in the forward direction at the midpoint of connection among the LEDs of the illumination unit are turned on. With a simple circuit configuration that effectively utilizes the function of energizing only, the LED to be lit can be lit with sufficient illuminance even in the event of an emergency when power supply from the main power supply is stopped.

  In addition, since a plurality of illumination units are connected in parallel with the main power source, and the auxiliary power source is connected to the external input terminal, all the illumination units (LED row 20) and the auxiliary power source are connected in parallel. The LEDs connected to the LED can be lit in a plurality of rows, and the necessary minimum illuminance and light irradiation range can be ensured even in an emergency.

  Further, a plurality of illumination units are connected in parallel with the main power source, and the arbitrary connection midpoint is set as one end of the external input terminal for each of the plurality of illumination units, and forward terminals of the plurality of LEDs in each of the illumination units are provided. By connecting the auxiliary power supply to the external input terminal as the other end of the external input terminal, all the illumination units and the auxiliary power supply are connected in parallel, so that the LEDs connected in series are lit in multiple rows Even in an emergency, the necessary minimum illuminance and light irradiation range can be ensured.

Furthermore, since the auxiliary power source is connected in parallel via a diode and a resistor arranged outside the lighting unit for each of the plurality of lighting units, the voltage value of the main power source can be suppressed, and each Each lighting unit is an independent circuit, and even if a problem occurs in any lighting unit, damage can be minimized.
Furthermore, as shown in FIG. 3, by eliminating the intersection of wiring, it can be mounted on a single-sided substrate, and the structure can be simplified and downsized.

(Second embodiment of the present invention)
The illumination device according to this embodiment will be described with reference to FIG. FIG. 5 is a diagram illustrating a circuit example of the illumination device according to the present embodiment. In the present embodiment, descriptions overlapping with those in the first embodiment are omitted.

  The illuminating device 3 according to the present embodiment performs switching between power supply from the main power supply 2 and power supply from the auxiliary power supply 4 via a transistor. N-channel MOSFET and P-channel MOSFET are used as the transistors. As shown in FIG. 5, an N-channel FET 51 and a P-channel FET 52 are connected in series from the main power supply 2 via a diode D2, and the auxiliary power supply 4 is connected between the FET 51 and FET 52 via a diode D1. It is connected. When power is supplied from the main power supply 2, a positive voltage is applied to the gate. Therefore, the FET 51 is turned on and the FET 52 is turned off, so that power supply from the external input terminal 6 by the auxiliary power supply 4 is not performed. When the power supply from the main power supply 2 is stopped, a negative voltage is applied to the gate, so that the FET 51 is turned off and the FET 52 is turned on, and the power supply from the auxiliary power supply 4 is performed. That is, the power supply from the auxiliary power source 4 can be controlled according to the presence or absence of the power supply from the main power source 2 with a simple circuit in which a diode is connected.

  Thus, according to the lighting device according to the present embodiment, the lighting of the LED by the main power supply and the lighting of the LED by the auxiliary power supply are switched using the transistor, so that it is not a complicated circuit configuration having a switching control function. The power supply can be switched smoothly with a simple circuit configuration.

(Third embodiment of the present invention)
The lighting device according to this embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a configuration diagram of a lighting system including the lighting device according to the present embodiment, and FIG. 7 is a circuit diagram for lighting an auxiliary LED in the lighting device according to the present embodiment. In the present embodiment, descriptions overlapping with those in the first embodiment are omitted.

  In FIG. 6, the lighting device 3 according to the present embodiment is disposed in the vicinity of the external input terminal 6, and stores the charge supplied from the main power supply 2 to the auxiliary LED 7 that irradiates at least the external input terminal 6 with light. When the power supply from the main power supply 2 is stopped, the auxiliary LED 7 is turned on with the power supplied from the power storage unit 8 to efficiently connect the external input terminal 6 and the auxiliary power supply 4. Is what you do.

  The difference between FIG. 6 and FIG. 1 in the first embodiment is that the lighting device 3 stores power with the charge supplied from the main power supply 2, and is supplied with power from the power storage unit 8 and is at least externally input. And an auxiliary LED 7 that irradiates the terminal 6.

  Charge is stored in the power storage unit 8 while power is supplied from the main power supply 2, and when the power supply from the main power supply 2 is stopped, the auxiliary LED 7 is turned on with the charge stored in the power storage unit 8. . Since the auxiliary LED 7 irradiates at least the external input terminal 6 with light, even if the external input terminal 6 and the auxiliary power supply 4 are not always connected, they can be quickly connected in an emergency. Further, the auxiliary LED 7 only needs to be able to light a limited area until the external input terminal 6 and the auxiliary power supply 4 are connected, so that the amount of charge stored in the power storage unit 8 is not so large.

  In the circuit diagram of FIG. 7, when power is supplied from the main power supply 2, the charges are stored in the power storage unit 8 (capacitor) provided in the auxiliary power supply connection box 35 while the LEDs 21 of each LED row 20 are turned on. It is done. When the power supply from the main power supply 2 is stopped, the switch 32 is switched according to the voltage of the resistor R5, power is supplied from the power storage unit 8 to the auxiliary LED 7 via the resistor R3, and the auxiliary LED 7 is turned on. At this time, a diode D3 is provided to prevent charge leakage from the power storage unit 8 and malfunction of the switch 32.

While the auxiliary LED 7 is lit, the auxiliary power supply 4 is connected via the outlet 31, and when the auxiliary power supply 4 is connected, the LED 21 connected in the forward direction of the connection middle point 25 is lit.
As described above, in the lighting device according to the present embodiment, at least the auxiliary LED that irradiates light to the connection portion between the external input terminal and the auxiliary power source, the electric charge supplied from the main power source, and the stored electric power When the power supply from the main power supply is stopped when the power supply from the main power supply is stopped, the auxiliary LED is turned on by the power storage means, so even if the auxiliary power supply and the external input terminal are not always connected, The connection work can be performed quickly and efficiently by irradiating light to the connecting portion between the auxiliary power source and the external input terminal.

  Although the present invention has been described with the above embodiments, the technical scope of the present invention is not limited to the scope described in the embodiments, and various modifications or improvements can be added to these embodiments. . And embodiment which added such a change or improvement is also contained in the technical scope of the present invention. This is apparent from the claims and the means for solving the problems.

D1 to D3 Diodes R1 to R7 Resistance 1 Lighting system 2 Main power supply 3 Lighting device 4 Auxiliary power supply 5 Illumination unit 6 External input terminal 7 Auxiliary LED
8 Power storage unit 20 LED array 21 LED
25 Connection midpoint 31 Outlet 32 Switch 35 Auxiliary power supply connection box 51, 52 FET

Claims (6)

When the power supply from the main power supply stops, in the LED lighting device that lights the LED by power supply from the auxiliary power supply,
An illuminating unit connected to the main power source, and a plurality of LEDs connected in series;
An arbitrary input midpoint of the plurality of LEDs in the illumination unit as one end and an external input terminal having the other end as a forward terminal of the plurality of LEDs,
When power supply from the main power supply is stopped, the auxiliary power supply is connected to the external input terminal for power supply, and among the LEDs of the illumination unit, the LEDs connected in the forward direction of the connection midpoint are turned on. LED lighting device characterized by the above. The LED lighting device according to claim 1,
A plurality of the illumination units are connected in parallel with the main power source, and the arbitrary connection midpoint is set as one end of an external input terminal for each of the plurality of illumination units, and forward terminals of a plurality of LEDs in each of the illumination units are The LED lighting device, wherein the illumination unit and the auxiliary power source are connected in parallel by connecting the auxiliary power source to the external input terminal as the other end of the external input terminal. The LED lighting device according to claim 2,
The LED lighting device, wherein the auxiliary power source is connected in parallel via a diode and a resistor arranged outside the lighting unit for each of the plurality of lighting units. The LED lighting device according to any one of claims 1 to 3,
An LED lighting device characterized by switching between lighting of the LED by the main power source and lighting of the LED by the auxiliary power source using a transistor. The LED lighting device according to any one of claims 1 to 4,
An auxiliary LED disposed in the vicinity of the external input terminal and irradiating at least the external input terminal with light;
A power storage unit configured to store electric power supplied from the main power source and supply the stored electric power to the auxiliary LED;
The LED lighting device, wherein when the power supply from the main power supply is stopped, the auxiliary LED is turned on by the power storage means. The LED lighting device according to any one of claims 1 to 5,
The LED lighting device, wherein the main power source is a commercial power source, and the auxiliary power source is an automobile battery.

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