JP6035766B2 - LED lighting device - Google Patents

Description

  The present invention relates to a technique for reducing generation of high-frequency noise in an LED lighting device.

  When the on / off control of the LED device is performed, high-frequency noise is generated from the switching element. This high-frequency noise causes problems such as radio wave interference not only in the LED device but also in external electrical equipment. In order to solve this problem, means for arranging a shielding material for blocking high-frequency noise between the circuit board and the LED device is used (Patent Document 1).

JP 2001-177154 A

  The means for disposing a shielding material that blocks high-frequency noise between the circuit board and the LED device has a problem that it is impossible to suppress the generation of high-frequency noise generated from the wiring connecting the circuit board and the LED device.

  The present invention has been made in view of the above-described points, and solves problems in electrical equipment and the like due to high-frequency noise generated from wiring or the like connecting a circuit board and an LED device.

A lighting fixture apparatus according to the present invention includes a plurality of LED modules in which a plurality of light emitting diode elements are arranged in series and connected in series to each other, an illumination lighting apparatus that lights the light emitting diode elements, the illumination lighting apparatus, and the A first wiring that connects the anode side of the LED module, and a second wiring that connects the illumination lighting device and the cathode side of the LED module, and the length of the first wiring is the length of the second wiring shorter than, length of the third wiring connecting between the LED modules in series is the second rather short than the length of the wiring, the first length of wire the third wiring short Ikoto than the length It is characterized by .

  The LED illumination device according to the present invention has a unique effect of suppressing the generation of high-frequency noise by shortening the high-voltage-side wiring out of the wiring connecting the circuit board and the LED to the low-voltage-side wiring. It is what has.

The figure which shows the LED illuminating device 1a which connected the two 1-row type | mold LED modules which concern on Embodiment 1 in parallel. The figure which shows the circuit structure of the LED lighting apparatus 1a which concerns on Embodiment 1. FIG. The figure which shows the LED illuminating device 1b which connected the two 1-row type | mold LED modules which concern on Embodiment 1 in series. FIG. 3 is a diagram illustrating a circuit configuration of the LED lighting device 1b according to the first embodiment. The figure which shows the LED illuminating device 1c which connected one one-row type | mold LED module which concerns on Embodiment 1. FIG. The figure which shows the LED lighting apparatus 1d which connected the four 1 line type LED modules which concern on Embodiment 1 two in series, and parallelly. The figure which shows the LED illuminating device 1e which connected the four 1 line type LED modules which concern on Embodiment 1 2 in series and parallelly, and has arrange | positioned in the square shape. The figure which shows the LED illuminating device 1f which connected the two two-row type LED modules which concern on Embodiment 1 in parallel. The figure which shows the LED illuminating device 1g which connected the two two-row type | mold LED module which concerns on Embodiment 1 in series. The figure which shows 1h of LED lighting apparatuses which connected one two-row type LED module which concerns on Embodiment 1. FIG. The figure which shows the LED lighting apparatus 1i which connected the four two-row type | mold LED module which concerns on Embodiment 1 two in series, and parallelly. FIG. 6 is a diagram illustrating a circuit configuration of an LED lighting device according to a second embodiment. FIG. 6 is a diagram showing a circuit configuration of an LED lighting device according to Embodiment 3.

Embodiment 1
The LED lighting device 1a according to Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing an LED illumination device 1a in which two single-row LED modules 2a and 2b are connected in parallel, and FIG. 2 is a diagram showing a circuit configuration of the LED illumination device 1a in FIG.
The LED modules 2a and 2b are modules in which a plurality of LED elements 2 (light emitting diode elements) are arranged in series in a line.

  In FIG. 1, an LED lighting device 1a includes two single-row LED modules 2a and 2b in which a plurality of LED elements 2 are arranged in series. The single-row LED module 2a and the single-row LED module 2b are connected in parallel. ing. Further, the LED lighting device 1a includes an illumination lighting device 3 that supplies a current for lighting the LED elements 2 mounted on the single row LED modules 2a and 2b to the single row LED modules 2a and 2b, and the illumination lighting device 3. 1st wiring 4a, 4b which connects the connection part by the side of the high potential side of the lighting lighting device 3 and the connection part by the side of the anode of 1 row type LED module 2a, 2b among the several wiring which connects the LED array modules 2a, 2b with 1 row Among the plurality of wirings connecting the illumination lighting device 3 and the one-row LED modules 2a, 2b, the connection portion on the low potential side of the illumination lighting device 3 and the connection portion on the cathode side of the one-row LED modules 2a, 2b are connected. Second wirings 5a and 5b are provided.

As shown in FIG. 1, the single-row LED modules 2a and 2b are configured by mounting a plurality of LED elements 2 on a vertically long, substantially rectangular electronic substrate. One end of the electronic substrate is provided with an anode-side connection portion, and the other end is provided with a cathode-side connection portion.
In the LED lighting device 1a, the linear distance between the terminal on the high potential side of the lighting device 3 and the connection part on the anode side of the one-row LED modules 2a and 2b is one row type with that on the low potential side of the lighting device 3. The LED lighting device 1a is made smaller than the linear distance from the cathode side connection part of the LED modules 2a and 2b. The length of 4b is made shorter than the length of the second wirings 5a and 5b connecting the illumination lighting device 3 and the one-row LED module 2a on the cathode side which is the low potential side.

The generation of high frequency noise can be reduced by shortening the first wirings 4a and 4b to which a high voltage is applied. Further, in this structure, the lengths of the first wirings 4 a and 4 b are short and do not intersect with the wiring connected to the AC power source 6. Noise can be reduced.
That is, by making the first wirings 4a and 4b on the anode side shorter than the second wirings 5a and 5b on the cathode side, noise generated from the first wirings 4a and 4b can be greatly reduced. Even if the noise generated from the second wirings 5a and 5b is increased by increasing the lengths of 5a and 5b, the total amount of noise generated from the LED lighting device 1a can be reduced. In addition, since the lengths of the first wirings 4a and 4b are short, the influence of noise on the electronic devices around the first wirings 4a and 4b can be suppressed.

In addition, when the illumination lighting device 3 is a constant current circuit, the voltage applied to the anode side of the single-row LED modules 2a and 2b by connecting the two single-row LED modules 2a and 2b in parallel, as compared with the case of connecting them in series. Therefore, noise generated from the first wirings 4a and 4b on the anode side can be suppressed to be small.
Further, when the LED lighting device 1a has a substantially square shape, the single-row LED modules 2a and 2b can be easily arranged at symmetrical positions, so the distribution of light output (light distribution characteristics) generated by the LED lighting device 1a is symmetric. It has the advantage that the property is improved.

  Next, an example of a circuit configuration of the LED lighting device 1a will be described with reference to FIG. Note that the present invention is not limited to the circuit configuration illustrated in FIG. 2, and may be any circuit that can light the LED elements 2 mounted on the single-row LED modules 2 a and 2 b.

  In FIG. 2, an illumination lighting device 3 turns on an LED element 2 from a direct current power circuit 7 that converts an alternating current voltage of an alternating current power source 6 such as a commercial power source into a direct current voltage, and a direct current supplied from the direct current power circuit 7. And an LED lighting circuit 10a.

  The DC power supply circuit 7 includes a full-wave rectifier circuit 8 and an output capacitor 9. The full-wave rectifier circuit 8 rectifies and outputs an AC voltage input from the AC power supply 6 using a diode bridge. The output capacitor 9 smoothes the rectified voltage rectified and output from the full-wave rectifier circuit 8 into a DC voltage and outputs it to the LED lighting circuit 10a.

The LED lighting circuit 10 a has a circuit configuration called a buck converter, and includes a switching element 11 connected to the output side of the DC power supply circuit 7 and a coil connected to the output side of the DC power supply circuit 7 via the switching element 11. 12, a first diode 13 having a cathode connected between the switching element 11 and the coil 12, two capacitors 14a and 14b connected in parallel to each of the two one-row LED modules 2a and 2b, and switching An output control circuit 15 that controls the element 11, two balancers 17a and 17b that are connected in series to the coil 12 and connected in parallel to each other, an anode is connected to the balancer 17a, and a cathode is a positive electrode of the capacitor 14a. And a second die connected to the anode side of the one-row LED module 2a A second diode 18b having an anode connected to the balancer 17b, a cathode connected to the positive electrode of the capacitor 14b and the anode side of the other one-row LED module 2b, and two one-row LED modules 2a and 2b. It comprises a detection resistor 19 for detecting the flowing current and outputting a detection value to the main power control circuit 15. The output control circuit 15 controls the switching element 11 based on the output result of the detection resistor 19.
The switching element 11 is composed of an n-channel MOSFET, and the capacitors 14a and 14b are composed of electrolytic capacitors.

The switching element 11 has a drain connected to the output side of the DC power supply circuit 7, a source connected to one end of the coil 12, and a gate connected to the output control circuit 15. The other end of the coil 12 and one end of the balancers 17a and 17b are connected, and the other ends of the balancers 17a and 17b are connected to the anodes of the second diodes 18a and 18b.
The capacitor 14a has a positive electrode connected to the cathode of the second diode 18a and the anode side of the one row LED module 2a, and a negative electrode connected to the cathode side of the one row LED module 2a. Similarly, the capacitor 14b has a positive electrode connected to the cathode of the second diode 18b and the anode side of the other one-row LED module 2b, and a negative electrode connected to the cathode side of the other one-row LED module 2b.
The single-row LED module 2a is connected in parallel with the capacitor 14a, and the single-row LED module 2b is connected in parallel with the capacitor 14b.
The balancers 17a and 17b are provided in a common magnetic circuit, and include windings in a winding direction that act to cancel the magnetic flux of the magnetic circuit when equal currents flow. For this reason, a substantially equal current is allowed to flow through each of the two single-row LED modules 2a and 2b, thereby reducing a leakage current that causes unnecessary high-frequency noise.

Next, the operation of the LED lighting circuit 10a will be described.
The main power control circuit 15 performs control to switch the switching element 11 on and off.
When the switching element 11 is ON, a current flows in the order of the switching element 11 → the coil 12 → the balancer 17a and the balancer 17b. A current flows from the balancer 17a in the order of the balancer 17a → the second diode 18a → one one-row LED module 2a → the detection resistor 19. Similarly, current flows from the balancer 17b in the order of the balancer 17b → the second diode 18b → the other one-row LED module 2b → the detection resistor 19.
When the switching element 11 is OFF, a current flows in the order of the first diode 13, the coil 12, the balancer 17a, and the balancer 17b. A current flows from the balancer 17a in the order of the balancer 17a → the second diode 18a → one one-row LED module 2a → the detection resistor 19. Similarly, current flows from the balancer 17b in the order of the balancer 17b → the second diode 18b → the other one-row LED module 2b → the detection resistor 19.
The detection resistor 19 is connected between the anode of the first diode 13, the negative electrodes of the capacitors 14a and 14b, and the cathode side of the two single-row LED modules 2a and 2b connected in parallel. When the current value detected by the detection resistor 19 becomes smaller than a predetermined value, the output control circuit 15 performs control to increase the amount of current flowing through the switching element 11 (specifically, increase the ON state interval). When the detected value becomes larger than a predetermined value, the output control circuit 15 performs control to reduce the amount of current flowing through the switching element 11 (specifically, increase the OFF state interval). That is, the output control circuit 15 controls the switching element 11 by PWM (Pulse Width Modulation).
The illumination lighting device 3 configured as described above has a single-row LED by flowing current from the LED lighting circuit 10a to the single-row LED modules 2a and 2b via the first wires 4a and 4b and the second wires 5a and 5b. The modules 2a and 2b can be turned on.

  As described above, the circuit configuration of the LED lighting device shown in FIG. 2 is employed in the LED lighting device 1a shown in FIG.

Next, an LED lighting device 1b in which two single-row LED modules 21a and 31a, which are another embodiment of the first embodiment, are connected in series will be described with reference to FIGS.
FIG. 3 is a diagram showing an LED illumination device 1b in which two single-row LED modules 21a and 31a according to Embodiment 1 are connected in series, and FIG. 4 is a diagram showing a circuit configuration of the LED illumination device 1b.
Of the single-row LED modules 21a and 31a connected in series, the single-row LED module 21a is connected to the high potential side, and the single-row LED module 31a is connected to the low potential side.

In FIG. 3, the LED lighting device 1 b includes a single-row LED module 21 a and a single-row LED module 21 a and 31 a arranged in series and a current for lighting the LED elements 2 mounted on the single-row LED modules 21 a and 31 a. , 31a to be supplied to the lighting lighting device 3, and a plurality of wirings connecting the lighting lighting device 3 and the one-row type LED modules 21a, 31a. The first wiring 24 that connects the anode side, and the low-potential-side connection portion of the lighting lighting device 3 and the cathode side of the single row LED module 31a among the plurality of wirings that connect the lighting lighting device 3 and the single row LED module 31a. The second wiring 25 to be connected, the cathode side of the one-row LED module 21a, and the one-row LED module 31a And a third wiring 26 that connects the node side.
When the voltage V1 applied to the first wiring 24, the voltage V2 applied to the second wiring 25, and the voltage V3 applied to the third wiring 26 are compared, V1>V2> V3.

As shown in FIG. 3, each of the single-row LED modules 21a and 31a is configured by mounting a plurality of LED elements 2 on a vertically long, substantially rectangular electronic substrate. One end of these electronic substrates is provided with an anode-side connection portion, and the other end is provided with a cathode-side connection portion.
The single-row LED module 21a is disposed at a position closer to the illumination lighting device 3 than the single-row LED module 31a, and the terminal on the high potential side of the illumination lighting device 3 and the anode side of the single-row LED module 21a. The linear distance to the connection part is smaller than the linear distance between the terminal on the low potential side of the lighting device 3 and the connection part on the cathode side of the one-row LED module 31a. Further, the one-row LED module 21a and the one-row LED module 31a are arranged in parallel in the longitudinal direction so that the anode-side connection portion and the cathode-side connection portion are inverted. That is, the linear distance between the anode-side connection portion of the single-row LED module 21a and the cathode-side connection portion of the single-row LED module 31a, the cathode-side connection portion of the single-row LED module 21a, and the anode of the single-row LED module 31a. The straight line distance with the connecting portion on the side is substantially equal.

  With this configuration, the LED lighting device 1b has the length of the first wiring 24 that connects the lighting lighting device 3 and the one-row type LED module 21a on the anode side that is the high potential side, and the lighting lighting device 3 and the one-row type. The LED module 31a is configured to be shorter than the length of the second wiring 25 connecting the cathode side which is the low potential side. Furthermore, since the anode side connecting portion of the single row LED module 21a is located closer to the cathode side connecting portion than the anode side connecting portion of the single row LED module 31a, the length of the third wiring 26 having a medium potential is set. The length of the second wiring 25 can be made shorter.

  Comparing the length L1 of the first wiring 24, the length L2 of the second wiring 25, and the length L3 of the third wiring 26, the relationship is L1 <L2 and L3 <L2. In addition to these relationships, it is desirable to arrange the single-row LED modules 21a and 31a with respect to the illumination lighting device 3 so that L1 <L3.

  Generation of high-frequency noise can be reduced by making the first wiring 24 to which a high voltage is applied shorter than the second wiring 25, that is, by making the second wiring 25 to which a low voltage is applied the longest. Furthermore, noise can be reduced by making the first wiring 24 shorter than the third wiring 26 to which the intermediate potential is applied.

  By making the anode-side first wiring 24 shorter than the second wiring 25 and the third wiring 26 shorter than the second wiring 25, noise generated from the first wiring 24 and the third wiring 26 can be greatly reduced. Therefore, even if the noise generated from the second wiring 25 is increased by increasing the length of the second wiring 25, the total amount of noise generated from the LED lighting device 1b can be reduced. Moreover, since the length of the 1st wiring 24 and the 3rd wiring 26 is short, the influence of the noise given to the electronic device around the 1st wiring 24 and the 3rd wiring 26 can be suppressed.

  Further, in this structure, since the length of the first wiring 24 is short and does not intersect with the wiring connected to the AC power source 6, high-frequency noise transmitted to the AC power source 6 or the illumination lighting device 3 can be reduced.

  In addition, by connecting the single-row LED modules 21a and 31a in series, the total wiring length between the single-row LED modules 21a and 31a and the single-row LED modules 21a and 31a from the illumination lighting device 3 can be reduced as compared with the case where they are connected in parallel. Since it can be shortened, noise leaking to the outside can be reduced. By adopting this circuit configuration, it is possible to eliminate problems with electrical equipment due to high frequency noise. Furthermore, since there is no need to use a balancer or the like, there is an advantage that the circuit configuration is simplified.

Only the differences from the circuit configuration of FIG. 2 will be described with reference to FIG.
The LED lighting device 10b shown in FIG. 4 does not include the balancers 17a and 17b and the second diodes 18a and 18b shown in FIG. 2 because the connected single-row LED modules 21a and 31a are connected in series.
And one capacitor | condenser 14c is connected in parallel with respect to the 1 line type LED module 21a, 31a mutually connected in series.

  In FIG. 1, two single-row LED modules 2 a and 2 b and two single-row LED modules 21 a and 31 a in FIG. 3 have been described, but the LED lighting device 1 c illustrated in FIG. 5 has been described. As such, a configuration including only one single-row LED module 20 may be used. With this configuration, the anode-side voltage is smaller than that of the LED lighting devices 1a and 1b, and the cause of noise leakage to the outside such as the balancer can be suppressed to a low level. Can solve the problem.

FIG. 6 is a diagram showing an LED lighting device 1d in which four single-row LED modules 22a, 22b, 32a, and 32b are connected in series and in parallel. In the LED lighting device 1d, the single-row LED modules 22a and 32a are connected in series, and the single-row LED modules 22b and 32b are similarly connected in series. Then, a set of two single-row LED modules 22a and 32a connected in series and a set of single-row LED modules 22b and 32b are connected in parallel. The single-row LED modules 22a and 22b are on the high potential side, and the single-row LED modules 32a and 32b are on the low potential side.
First wirings 24a and 24b for connecting the high-potential side connection portion of the illumination lighting device 3 and the anode side of the one-row LED modules 22a and 22b, the low-potential side connection portion of the illumination lighting device 3 and the single-row LED module 32a. , 32b, the second wiring 25a, 25b connecting the cathode side of the 32b, and the third wiring 26a, 26b connecting the cathode side of the single row LED modules 22a, 22b and the anode side of the single row LED modules 32a, 32b. .
By adopting this configuration, the LED lighting device 1d can obtain more brightness than the case where the number of the single-row LED modules 2a is two.

FIG. 7 is a diagram showing another form of the LED lighting device 1d, and shows an LED lighting device 1e in which four single-row LED modules 22a, 22b, 32a, 32b are arranged in a square shape. The circuit configuration of the LED lighting device 1e is the same as that of the LED lighting device 1d, but the LED lighting device 1e is different from the LED lighting device 1d in the arrangement configuration of the single-row LED modules.
The illumination lighting device 3 of the LED lighting device 1e has a substantially rectangular parallelepiped shape, a terminal connected to the AC power source 6 is provided at one end in the longitudinal direction, and the single row LED modules 22a and 22b are provided at the other end in the longitudinal direction. A terminal connected to the anode side of the LED and a terminal connected to the cathode side of the one-row LED modules 32a and 32b are provided.
The four single-row LED modules 22a, 22b, 32a, and 32b are arranged in a quadrangular shape, and the diagonal lines of the single-row LED modules 22a, 22b, 32a, and 32b in which the longitudinal direction of the illumination lighting device 3 is arranged in a quadrangular shape They are arranged so as to be substantially coincident or parallel.
An output terminal on the high potential side of the lighting device 3 is arranged in the vicinity of a square corner formed by the four single-row LED modules 22a, 22b, 32a and 32b. Single row LED modules 22a and 22b are provided to be arranged. And the low potential side output terminal of the illumination lighting device 3 is arranged on the diagonal where the high potential side output terminal of the illumination lighting device 3 is arranged, and this low potential side output terminal is arranged. Single-row LED modules 32a and 32b are provided so that the cathode-side output terminal is positioned near the corner.

By adopting this arrangement, the illumination lighting device 3 can be arranged inside the quadrilateral LED modules 22a, 22b, 32a, and 32b arranged in a square shape, so that the overall size of the LED lighting device 1e can be reduced. .
Moreover, although the 2nd wiring 25a, 25b becomes long, since the 1st wiring 24a, 24b can be shortened, the noise which generate | occur | produces can be reduced comprehensively.
If the output terminal on the low potential side of the lighting device 3 is arranged at the end opposite to the output terminal on the high potential side, the length of the second wirings 25a and 25b can be shortened, so that the noise can be further reduced. Can be reduced.

FIG. 8 shows an LED lighting device 1f in which two double-row LED modules 40a and 40b (LED modules arranged in series in two rows by folding the LED elements 2 forming the LED module at one end) are connected in parallel. FIG. In the two-row LED modules 40a and 40b, the LED elements 2 forming the LED module are folded in one end in the two-row LED modules 40a and 40b and arranged in series in two rows. 34a, 34b and the second wirings 35a, 35b are connected on the same side.
Accordingly, the cathode side connecting portions of the two-row LED modules 40a and 40b can be arranged close to the output terminal on the low potential side of the illumination lighting device 3 in the same manner as the anode side connecting portions. , 35b can be made shorter than the length of the second wirings 5a, 5b used for the single-row LED modules 2a, 2b, so that it is possible to eliminate problems with electrical devices due to high-frequency noise generated slightly on the cathode side. .
In addition, the LED lighting device 1f can obtain more brightness by using the double-row LED modules 40a and 40b than when using the single-row LED modules 2a and 2b.
In addition, since the double-row LED modules 40a and 40b are arranged so that the anode-side terminals of the double-row LED modules 40a and 40b are closer to the output terminal of the lighting device 3 than the cathode-side terminals, The length of the first wirings 34a and 34b can be made shorter than the length of the second wirings 35a and 35b, and noise generated from the first wirings 34a and 34b can be reduced.

  FIG. 9 is a diagram showing an LED lighting device 1g in which two double-row LED modules 41a and 51a are connected in series, and FIG. 10 is a diagram showing an LED lighting device 1h in which one double-row LED module 40 is connected. FIG. 11 is a diagram showing an LED lighting device 1i in which four double-row LED modules 42a, 52a, 42b, and 52b are connected in series and in parallel. These are the same as the configurations of FIGS. 3, 5, and 6 except for the types of LED modules. Therefore, the LED illumination circuits 1g, 1h, and 1i shown in FIGS. 9, 10, and 11 can obtain higher brightness than those of FIGS.

  In the first embodiment, the lighting device using the single-row and double-row LED modules has been described. However, the type and arrangement of the LED modules to be used are not limited to those described above, and the high potential of the lighting lighting device 3 can be used. The length of the first wiring connected to the side may be shorter than the length of the second wiring 5 connected to the low potential side.

Embodiment 2
A second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 12, the illumination lighting device 3c according to the second embodiment is obtained by dividing the coil 12 of the illumination lighting device 3a according to the first embodiment into two parts.

Only differences from the first embodiment will be described below.
The illumination lighting device 3c according to FIG. 12 divides the coil 12 of the illumination lighting device 3 according to FIG. 2 of the first embodiment into two to form coils 12a and 12b, which are respectively connected in parallel. 2a and 2b are arranged to supply current. Furthermore, in FIG. 12, the first diodes 13a and 13b are provided corresponding to the first diode 13 according to FIG. 2 of the first embodiment. In this configuration, the coils 12a and 12b supply electric power to the respective single-row LED modules 2a and 2b connected in parallel, so that the electric power to be borne by each of the coils 12a and 12b is reduced, so that a small one can be used. Therefore, high frequency noise generated from the coils 12a and 12b can be reduced.
Even if a difference occurs between the current values of the two LED modules 2a and 2b, the mutual currents of the LED modules 2a and 2b are caused by the action of the balancers 17a and 17b which try to make the currents flowing into the coils 12a and 12b equal. Can be approximately equal.

  In this way, by adopting the circuit configuration of the LED lighting circuit 10c shown in FIG. 12 in the LED lighting device 1a shown in FIG. 1, generation of high frequency noise can be suppressed.

Embodiment 3
A third embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 13, the illumination lighting device 3 according to the third embodiment is such that the balancers 17a and 17b of the illumination lighting device 3 according to the first embodiment are arranged on the lower potential side than the LED modules 2a and 2b. is there.

Only differences from the first embodiment will be described below.
In the circuit configuration of FIG. 13, the balancers 17a and 17b are arranged on the lower potential side than the two LED modules 2a and 2b, and the second diodes 18a and 18b are changed along with the change in the arrangement of the balancers 17a and 17b. The polarity is the same as in the first embodiment, but the connection position is changed. Thus, the occurrence of high frequency noise can be reduced by arranging the balancers 17a and 17b on the lower potential side.

In order to apply the coils 12a and 12b shown in the second embodiment to the third embodiment, the coils 12a and 12b are connected instead of the coil 12 connected to the first diode 13 in FIG. In the case of the coil 12a, it is connected between the cathode of the second diode 18a and the balancer 17a or the anode side of the second diode 18a, and in the case of the coil 12b, it is connected between the cathode of the second diode 18b and the balancer 17b or the second diode. Connect to the anode side of 18b.
Thus, the coil 12a may be connected in series to the parallel circuit formed by the capacitor 14a and the LED module 2a. Similarly, the coil 12b may be connected in series to the parallel circuit formed by the capacitor 14b and the LED module 2b.

As described above, by providing the balancers 17a and 17b on the low potential side, generation of high frequency noise can be reduced by further suppressing generation of high frequency noise from the low potential side.
Furthermore, since the coil 12a and 12b are provided with the coil 12 divided into the coils 12a and 12b in the same manner as in the second embodiment, each coil 12a and 12b can be reduced in power, and thus the coils 12a and 12b can be downsized. .

1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i LED lighting device,
2 LED elements,
2a, 2b, 20, 21a, 31a, 22a, 22b, 32a, 32b single-row LED module,
40, 40a, 40b, 41a, 42a, 42b, 51a, 52a, 52b Double-row LED module,
3, 3a, 3b, 3c Lighting lighting device,
4, 4a, 4b, 24, 24a, 24b, 34a, 34b first wiring,
5, 5a, 5b, 25, 25a, 25b, 35a, 35b Second wiring,
26, 26a, 26b Third wiring 6 AC power supply,
7 DC power circuit,
8 full-wave rectifier circuit,
9 Output capacitor,
10a, 10b, 10c LED lighting circuit,
11 switching elements,
12, 12a, 12b coil,
13, 13a, 13b first diode,
14a, 14b, 14c capacitors,
15 output control circuit,
17a, 17b Balancer,
18a and 18b second diode,
19 Sense resistor,

Claims (3)

A plurality of light emitting diode elements arranged in series, and a plurality of LED modules connected in series;
An illumination lighting device for lighting the light emitting diode element;
A first wiring connecting the illumination lighting device and the anode side of the LED module;
A second wiring for connecting the illumination lighting device and the cathode side of the LED module;
The length of the first wiring is shorter than a length of the second wire, the length of the third wiring connecting between the LED modules in series rather short than a length of the second wire, the first wire length LED lighting device comprising a short-Ikoto than a length of the third wiring. The illumination lighting device is:
When a plurality of the LED modules in parallel, LED lighting device according to claim 1, characterized in that it comprises a plurality of coils for supplying electric power to each of the LED modules. The illumination lighting device is:
When a plurality of the LED modules are provided in parallel, a balancer that equalizes the amount of current flowing through the plurality of LED modules is provided.
The balancer LED lighting device of any crab according to claim 1 or claim 2, characterized in that arranged on the lower potential side of the LED module.

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