JP2607274Y2 - Lighting equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for lighting a large number of fluorescent lamps.

[0002]

2. Description of the Related Art FIG . 3 shows a circuit diagram of a conventional lighting device.
The lighting equipment A is connected to the AC power supply AC. The luminaire A is more, the fluorescent lamp 1 ₁ 2 In this example, 1 ₂ is parallel configuration, the two ends of the filament of each fluorescent lamp 1 _1, 1 ₂ of the non-power supply side is starting device Electronic starter 2 ₁ ,
2 ₂ are respectively connected. L is a choke coil.

Here, among the starting devices for fluorescent lamps, an electronic starter generally requires a large preheating current in order to shorten the starting time as compared with a glow starter, and therefore adopts a method of supplying a half-wave preheating current. . In luminaire A having a plurality of such electronic starters, as shown in FIG. 3, it is usual preheating current is connected to the fluorescent lamp 1 _1, 1 ₂ of the filaments to flow in the same direction.

[0004]

[Problem to be Solved by the Invention] Such a lighting fixture A
When a large number of long-distance feed wires are used, a large current for the number of lamps flows through the wires, and a voltage drop occurs due to the resistance of the wires of the wires. Here, (a) of FIG. 4 shows lighting, (b) shows a start time, (a) shows a voltage waveform,
(B) shows the current waveform respectively.

As shown in FIG. 4A, even when the voltage drop caused by the lamp current (a) during lighting is several volts, as shown in FIG. Since the preheating current (b) flows in the same direction, it is 2
There is a problem that a voltage drop of about 3 times (broken line in (a)) occurs and the power supply voltage of the instrument input drops abnormally, so that starting failure often occurs. In particular, for many examples 2
In the case of zero lighting at once, a problem is likely to occur.

The present invention has been made in view of the above points, and has as its object to provide an illuminating device which aims to reduce a voltage drop at the time of starting and to eliminate poor starting.

[0007]

According to the present invention , a coil is provided on one side.
Has a pair of filaments connected in series,
The non-power side of the instrument, in the illumination device in which a plurality of connection to an AC power source the discharge lamp having a starting apparatus for lighting by applying a preheating current of a half-wave at startup, the same polarity of the off each starting device
The coil is connected to the filament, and a part or a half of the starting devices are connected to both ends of the filament of the discharge lamp so that the direction of the preheating current is reversed.

[0008]

When starting, the preheating current is distributed to the positive and negative phases of the power supply via the starting device, so that the voltage drop of the power supply voltage of the discharge lamp is reduced, and starting failure does not occur. Also, the distortion of the waveform of the input power supply voltage is reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a specific circuit diagram, those having different two fluorescent lamps 1 _1, 1 electronic starter 2 ₁ is connected to the non-power supply side of the filaments _2, 2 _second connection direction of the luminaire A is there. That is, the fluorescent lamp 1 of ₂ side electronic starter 2
_2, are connected so as to be opposite to the direction in which the preheating current of the fluorescent lamp 1 ₁ side of the electronic starter 2 ₁ flows.

Further, in the fluorescent lamp ₁ 1, 1 ₂ in Figure 1, electrostatic
Carp child starter 2 _1, 2 ₂ of the cathode side of the filament
The choke coil L is connected. And
These lighting fixtures A are connected by multiple feed wiring,
It is connected to a so-called multi-lamp lighting configuration. Figure
In 1 shows the case of the fluorescent lamp 1 _1, 1 ₂ 2 lamps in the luminaire A, the electronic starter 2 _1, 2 ₂ preheating current to each other are connected to have opposite directions, two lamps or more If one or more fluorescent lamps are connected, some or half of the electronic starters are connected in the opposite direction.

FIG . 2 shows a power supply voltage waveform and a preheating current waveform . FIG . 2A shows a power supply voltage waveform, and FIG . 2B shows a preheating current waveform. Here, the solid line in (a) shows the original power supply voltage waveform, and the broken line shows the waveform after dropping.
That is, the voltage drop is smaller than in the conventional case.
By connecting the electronic starter in the reverse direction in this way, at the time of starting, the preheating current is distributed to the positive and negative phases of the power supply, respectively, so that the voltage drop becomes small and the starting failure does not occur. In addition, the distortion of the power supply waveform is reduced.

[0012]

[Effect of the Invention] As described above, the present invention has a coil on one side.
It has a pair of filaments connected in series, each filament
The non-power side of the cement, in the illumination device in which a plurality of connection to an AC power source the discharge lamp having a starting apparatus for lighting by applying a preheating current of a half-wave at startup, the same polarity side of each starting device Fi
The coil is connected to the lament, and during the entire starting device,
Since some or half of the starting devices are connected to both ends of the filament of the discharge lamp so that the direction of current supply of the preheating current is reversed, at the time of starting, the preheating current is connected to the positive and negative phases of the power Since they are dispersed, the voltage drop of the power supply voltage of the discharge lamp is reduced, and starting failure does not occur. Also, there is an effect that distortion of the waveform of the input power supply voltage is reduced. Also, multiple connections to AC power supply
Each starting lamp has a coil on the same polarity side of each starting device.
Each discharge lamp has the same configuration because it is connected
Becomes Therefore, only one type of discharge lamp is used as a lighting device.
Just use it, the direction of connection of each discharge lamp to the AC power supply
Can easily reverse the direction of the preheating current.
Can be.

[Brief description of the drawings]

FIG. 1 is a specific circuit diagram of an embodiment of the present invention.

FIG. 2 is an operation waveform diagram of the above.

FIG. 3 is a specific circuit diagram of a conventional example.

FIG. 4 is an operation waveform diagram of the above.

[Explanation of symbols]

1 ₁ fluorescent light 1 ₂ fluorescent light 2 ₁ electronic starter 2 ₂ electronic starter AC AC power supply

Claims (1)

(57) [Scope of request for utility model registration] A pair of coils each having a coil connected in series.
A lighting device having a filament, and a non-power supply side of each filament, a discharge lamp having a starting device for lighting by supplying a half-wave preheating current at the time of starting, to an AC power supply,
The coil is attached to the same polarity side filament of each starter.
Connected, and the total starting device, the illumination device characterized by energizing direction of the part or preheating current starting device half is connected to both ends of the filament of the discharge lamp so as to reverse.