JP5294382B2 - Planar light emitting module lighting circuit and lighting device - Google Patents

Description

  The present invention relates to a planar light emitting module lighting circuit and a lighting device, and more particularly to a planar light emitting module lighting circuit that can be connected regardless of polarity by wiring a low-voltage AC power supply and can improve workability. And an illumination device.

  FIG. 7 shows an example of a conventional lighting device for an organic electroluminescence lamp. In the conventional organic electroluminescence lamp lighting device, the DC power source 11 is supplied to the organic electroluminescence lamp 15 by the lamp current control circuit 18. Based on the comparison result, a switch (R1) 14 is used so that the lamp current Ila detected as a voltage value is equal to the Ila reference value 17 preset to supply the rated current to the lamp. Tr1) 12 is controlled.

The DC power supply 11 is obtained by stepping down the commercial power supply 21 with a converter such as a step-down chopper shown in FIG. That is, the step-down chopper supplies a pulse width control signal to the rectifier 22 that converts the commercial power supply 21 into direct current, the transistor switch 23 that intermittently converts the direct-current voltage converted by the rectifier 22, and the base of the transistor switch 23. A chopper control circuit 27 for controlling the on / off period of the transistor switch 23, a flywheel diode 24 for passing a commutation current during the off period of the transistor switch 23, and an inductor 25 and a capacitor 26 for smoothing a direct current. (For example, refer to Patent Document 1).
JP 2007-122981 A

  However, in the conventional organic electroluminescence lamp lighting device, the converter is generally large in order to ensure an insulation distance and a withstand voltage. In addition, when using a plurality of lighting devices, this converter is provided for each lighting device, so that each of the lighting devices has a large size. Furthermore, since the wiring to the lighting device is a commercial power supply, the workability is poor, for example, a work qualification is required in the power supply wiring work.

  On the other hand, there is a method in which the converter and the lamp current control circuit are separately provided from the lamp and the DC power supply line is wired to supply current to the lamp. However, as the wiring length increases, the voltage applied to the module decreases due to the resistance of the wiring. As a result, a desired current may not be supplied.

  Also, if the module and the AC / DC converter that converts the commercial power supply to lighting output are integrated into a lighting fixture, the AC / DC converter's large size impairs the design, but the module is separated from the power source to improve the design. If the module is installed by extending the output line from the AC / DC converter, the wiring length becomes longer, so the voltage applied to the module decreases due to the voltage drop. Furthermore, since the wiring has polarity, it does not light up when the polarity is switched.

  The present invention has been made in view of the above circumstances, and can be connected regardless of polarity by wiring a low-voltage AC power supply, and a planar light emitting module lighting circuit capable of improving workability and An object is to provide a lighting device.

The planar light emitting module lighting circuit of the present invention uses a lamp composed of an organic electroluminescence layer and an electrode sandwiching the load as a load, and applies a current obtained by converting a commercial power source to direct current to emit light from the organic electroluminescence layer. in planar light-emitting module lighting circuit which includes a first converter circuit for converting a commercial power to the AC power supply is a sine wave of low voltage, a second converter circuit for converting an AC power supply of a low voltage direct current power supply, the It is mounted on a lighting device.

According to the above configuration, the lighting device, a second converter circuit for converting a first converter circuit for converting a commercial power source to the AC power supply is a sine wave of low voltage, the AC power supply undervoltage in the DC power supply because mounting the door, it is possible to connection regardless of the polarity by wiring the AC power supply, it is possible to improve the workability. Further, according to the above configuration, since the low-voltage AC power source output from the first converter circuit is a sine wave, it is possible to connect regardless of the polarity and improve the workability, and the insulation distance and It is easy to ensure the withstand voltage, and the planar light emitting module lighting circuit can be downsized. In addition, if this low voltage AC power supply is 36 V or less, it is the lighting voltage of the organic electroluminescence device, so that workability is improved.

The illumination device of the present invention is characterized in that the upper Symbol planar light-emitting module lighting circuit which is a lighting device for lighting the organic electroluminescence lamp.

According to the above configuration, by wiring an AC power source that is a low-voltage sine wave, it becomes possible to connect regardless of polarity, workability can be improved, and insulation distance and withstand voltage can be easily secured, The lighting device can be reduced in size.

As described above, according to the planar light-emitting module lighting circuit and a lighting device according to the present invention, a first converter circuit for converting a commercial power source to the AC power supply is a sine wave of low voltage, low voltage Since the second converter circuit for converting the AC power source into the DC power source is mounted, wiring can be performed regardless of the polarity by wiring the AC power source, and workability can be improved. In addition, it is easy to secure the insulation distance and the withstand voltage, and the planar light emitting module lighting circuit and the lighting device can be reduced in size.

  First, the outline | summary of the planar light emitting module lighting circuit concerning embodiment of this invention is demonstrated. The planar light emitting module lighting circuit of the present embodiment is provided with a first converter for converting from a commercial power source to a low voltage AC power source, and the lighting fixture is a second for converting the module and the low voltage AC power source into a direct current. A converter is installed. In this case, the low voltage AC power supply may be 36V or less, and the low voltage AC power supply may be a sine wave. The low voltage AC power supply may be a rectangular wave. According to this embodiment, wiring is possible regardless of polarity by wiring an AC power supply, and workability is also improved.

  FIG. 1 shows a first converter 32 of a planar light emitting module lighting circuit according to Example 1 of the present invention. The first converter 32 of this embodiment is constituted by a transformer. That is, for example, a transformer having a turns ratio of 3: 1 is connected as a first converter 32 to a commercial power supply 31 that generates AC 100V, and the transformer converts the voltage into a low voltage of AC 33V. Then, low-voltage AC 33V is supplied to the second converter by wiring.

  FIG. 2 shows the second converter 47 of the planar light emitting module lighting circuit according to Example 1 of the present invention. Second converter 47 is formed of a step-down chopper circuit. The step-down chopper circuit outputs a DC voltage that can supply the input AC power supply with a voltage necessary for lighting the lamp load. This voltage is supplied to the load by the lamp current control circuit 18 shown in FIG.

  As shown in FIG. 2, the second converter 47 of this embodiment includes a rectifier 41 that converts a low-voltage AC 33 V supplied from the first converter 32 into a DC, and a DC voltage converted by the rectifier 41. An intermittent transistor switch 42, a control circuit 46 for controlling the on / off period of the transistor switch 42 by supplying a pulse width control signal to the base of the transistor switch 42, and a commutation current in the off period of the transistor switch 42 It has a flywheel diode 43 that flows, and an inductor 44 and a capacitor 45 that smooth the direct current.

  If the voltage required for lighting the lamp exceeds the output voltage of the first converter 32, that is, the input voltage to the second converter 47, the second converter circuit 47 is not a step-down chopper but a step-up chopper circuit. do it. Alternatively, in any case, a step-up / down chopper circuit may be used.

  FIG. 3 shows the entire circuit of the planar light emitting module lighting circuit according to this example. The planar light emitting module lighting circuit of this embodiment is connected to the first converter 32 that converts AC 100V into low-voltage AC 33V, and to the first converter 32 via a wiring 48, and the low-voltage AC voltage 33V is converted into organic electroluminescence. The second converter unit 47 that converts the direct current voltage for driving the lamp 15, the resistor (R1) 14 that detects the lamp current Ila flowing through the organic electroluminescence lamp 15, and the Ila reference value 17 of the lamp current Ila are detected. A comparator 16 that compares the lamp current Ila and the Ila reference value 17 and drives the transistor switch 42 is provided.

As described above, according to the planar light emitting module lighting circuit according to the present embodiment, the first converter 32 that converts the commercial power supply 31 to the low voltage AC33V is provided separately, and the lighting fixture converts the module and the low voltage AC33V to DC. Since the second converter 47 to be converted is mounted and the first converter 32 and the second converter 47 are connected by the AC wiring 48, connection is possible regardless of polarity, and workability can be improved. .
In addition, according to a present Example, by setting to 36V or less, it becomes possible for anyone other than an unqualified person (construction person) to perform wiring construction.

  FIG. 4 shows a first converter 50 of the planar light emitting module lighting circuit according to Example 2 of the present invention. In this embodiment, the first converter 50 is composed of a step-down chopper circuit and a switch element. The switch elements Tr2 (57) to Tr5 (60) are alternately turned on with a pair of the switch element Tr2 (57) and the switch element Tr5 (60) or a pair of the switch element Tr3 (58) and the switch element Tr4 (59). Repeat / off to obtain a rectangular wave at the output end.

  That is, AC 100V supplied from the commercial power source 51 is rectified by the rectifier 52 to become a DC voltage. The DC voltage rectified by the rectifier 52 is intermittently switched by a switching transistor (Tr1) 53 and converted into a low-voltage DC voltage by an inductor 55 and a capacitor 56 constituting a smoothing filter. The electric charge accumulated in the capacitor 56 supplies a forward current (positive rectangular wave) to the second converter circuit connected during the period when the switch element Tr4 (59) and the switch element Tr3 (58) are turned on. In the period in which the switch element Tr2 (57) and the switch element Tr5 (60) are turned on, a reverse current (negative rectangular wave) is supplied to the second converter circuit.

  The second converter circuit is composed of a step-down chopper circuit similar to that shown in FIG. That is, the step-down chopper circuit outputs a DC voltage that can supply a voltage necessary for lighting the lamp load from the rectangular wave input from the first converter 50. This voltage is supplied to the load by the lamp current control circuit 18 shown in FIG.

  FIG. 5 shows an entire circuit of the planar light emitting module lighting circuit according to the present example. The planar light emitting module lighting circuit of the present embodiment is connected to a first converter 50 that converts AC 100V into a low-voltage rectangular wave, and to the first converter 50 by a wiring 61, and the low-voltage rectangular wave is converted into an organic electroluminescence lamp. 15 A second converter unit 47 for converting to a DC voltage for driving, a resistor (R1) 14 for detecting a lamp current Ila flowing in the organic electroluminescence lamp 15, an Ila reference value 17 for the lamp current Ila, and a detected lamp A comparator 16 that compares the current Ila with the Ila reference value 17 and drives the transistor switch 42 is provided.

  As described above, according to the planar light emitting module lighting circuit according to the present embodiment, the first converter 50 that converts the commercial power supply 51 into a low-voltage rectangular wave is separately provided, and the lighting fixture converts the module and the low-pressure rectangular wave into a low-voltage rectangular wave. Since the second converter 47 for converting to direct current is mounted and the first converter 50 and the second converter 47 are connected by the alternating current wiring 61, the wiring can be performed regardless of the polarity, thereby improving the workability. Can do.

  FIG. 6 shows an installation example of the illumination device (system) according to the third embodiment of the present invention. The illuminating device according to the present embodiment configures the illuminating device (system) by using a plurality of second converters in the planar light emitting module lighting circuit according to the first embodiment or the second embodiment. According to the present embodiment, the first converter can be shared by a plurality of lighting devices.

  That is, as shown in FIG. 6, in the first converter 72, the AC 100 V commercial power supply 71 is converted into a low voltage AC as in the first embodiment or a low voltage rectangular wave as in the second embodiment. Then, the low-voltage AC or rectangular wave converted by the first converter 72 is supplied to the plurality of second converters 73, 76, and 79.

  The second converters 73, 76, and 79 convert the supplied low-voltage AC or rectangular wave into a DC voltage that can supply a voltage necessary for lighting the lamp load, and pass through the lamp current control circuits 74, 77, and 80. The plurality of organic electroluminescence lamps 75, 78, 81 are controlled.

As described above, according to the planar light emitting module lighting circuit according to the present embodiment, the first converter 72 that converts the commercial power supply 71 into a low-voltage alternating current or a rectangular wave is provided separately, and the lighting fixture is a low-voltage alternating current with the module. Alternatively, since the second converters 73, 76, and 79 that convert the rectangular wave into direct current are mounted, wiring can be performed regardless of polarity by wiring alternating current, and workability can be improved. Moreover, since the 1st converter 72 is shared by several illuminating devices, the structure of an illuminating device can be simplified.
In addition, although embodiment of this invention demonstrated the organic electroluminescent lamp, it can select from suitable light sources, such as an inorganic electroluminescent lamp, without being limited to this.

  INDUSTRIAL APPLICABILITY The present invention can be used as a planar light emitting module lighting circuit and an illuminating device that can be connected regardless of polarity by wiring a low-voltage AC power supply and can improve workability.

The figure which shows the 1st converter 32 of the planar light emitting module lighting circuit concerning Example 1 of this invention. The figure which shows the 2nd converter 47 of the planar light emitting module lighting circuit concerning Example 1 of this invention. The figure which shows the whole circuit of the planar light emitting module lighting circuit concerning Example 1 of this invention. The figure which shows the 1st converter 50 of the planar light emitting module lighting circuit concerning Example 2 of this invention. The figure which shows the whole circuit of the planar light emitting module lighting circuit concerning Example 2 of this invention. The figure which shows the example of installation of the illuminating device (system) concerning Example 3 of this invention. The figure which shows the example of the conventional organic electroluminescent lamp lighting device The figure which shows the example of the pressure | voltage fall chopper of the conventional organic electroluminescent lamp lighting device

Explanation of symbols

11 DC power source 12, 23, 42, 53, 57, 58, 59, 60 Transistor switch 13, 26, 45, 56 Capacitor 14 Resistance 15, 75, 78, 81 Organic electroluminescence lamp 16 Comparator 17 Ila reference value 18, 74, 77, 80 Lamp current control circuit 21, 31, 51, 71 Commercial power supply 22, 41, 52 Rectifier 24, 43, 54 Diode 25, 44, 55 Inductor 27 Chopper control circuit 32, 50, 72 First converter 47 73, 76, 79 Second converter 48, 61 Wiring

Claims (2)

In a planar light emitting module lighting circuit that uses a lamp composed of an organic electroluminescent layer and an electrode sandwiching it as a load, and applies a current obtained by converting a commercial power source to direct current to emit light from the organic electroluminescent layer,
A first converter circuit for converting a commercial power to the AC power supply is a sine wave of low voltage,
Planar light-emitting module lighting circuit, characterized by mounting a second converter circuit for converting an AC power supply of a low voltage DC power supply, to the lighting device. The lighting device which lights an organic electroluminescent lamp by the planar light emitting module lighting circuit of Claim 1 .

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