JPH0733437Y2 - Lighting device for multiple discharge lamps - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lighting device for a multi-lamp discharge lamp that performs rapid start lighting of discharge lamps such as a plurality of fluorescent lamps.

PRIOR ART FIG. 4 is a simplified cross-sectional view of a typical prior art. 2. Description of the Related Art Conventionally, a multi-lamp lighting device including a plurality of fluorescent lamps and other discharge lamps has been used. For example, in the lighting device 1 for three lights, the two discharge lamps 2 and 4 arranged on both sides are
The two-lamp rapid start lighting circuit illuminates, and the remaining discharge lamp 3 arranged in the center is lit by the one-lamp rapid start lighting circuit. The two-lamp rapid start lighting circuit consists of two discharge lamps connected in series2,
A high secondary voltage is required to stably turn on 4 and such a high secondary voltage is applied to both discharge lamps 2 and 4 by the starting capacitor, so the starting performance is extremely good. is there.

On the other hand, the one-lamp rapid start lighting circuit is supposed to light at a starting voltage half the lighting voltage of the two-lamp rapid start lighting circuit in order to light one discharge lamp 3. Considering the reliable starting of the discharge lamp, a higher secondary voltage is required. However, if the secondary voltage is increased, not only a large ballast must be used, but also a socket 5 with an interlock mechanism must be used when the secondary voltage legally specified, eg, 300 V, is exceeded. Therefore, the manufacturing cost is high. Therefore, in order to obtain a high peak value of the secondary voltage while keeping the effective secondary voltage low, a configuration in which harmonic resonance such as the seventh harmonic or the ninth harmonic is performed is generally used. There is. Therefore, it is desirable that the secondary voltage of the rapid start lighting circuit for one lamp is set as low as possible, and therefore, it is set within a range in which the discharge lamp does not become unlit. This secondary voltage is, for example, the discharge lamp specified in JIS C 7601.
As for FLR110H / A and FLR110H / A ・ 100, the secondary voltage of the rapid start lighting circuit for 2 lights is 450V,
The secondary voltage of the rapid start lighting circuit for one lamp is 298V. In this way, as for each secondary voltage, the starting voltage of the rapid start lighting circuit for one lamp is actually more than half of the secondary voltage for two lamps as compared with the rapid start lighting circuit for two lights. .

Further, according to an experiment by the inventor of the present invention, in the lighting device 1 for three lights as described above, the two discharge lamps 2, which are arranged on both sides,
4 lights before discharge lamp 3 left in the center,
When the lights of the discharge lamps 2 and 4 on both sides of them hit the discharge lamp 3 that is lit by the central one-lamp rapid start lighting circuit, it was found that the starting voltage of the central discharge lamp 3 is significantly increased. . In this experiment, the ambient temperature of the lighting equipment for the three lights was set to 35 ° C, and the discharge lamp FLR110H / A or FLR110H described above was used.
/ A ・ 100 lighting test, two discharge lamps on both sides 2,4
The starting voltage of the central one-lamp discharge lamp 3 in the state of not lighting is that the ratio of the rated voltage to the input voltage of the one-lamp rapid start lighting device is 85 to 90%, and the two-lamp discharge lamps on both sides are The starting voltage of the central discharge lamp when the
It was 90-95%. In this experiment, the power supply voltage was increased by 2.5%, and the judgment was made based on whether or not the discharge lamp was turned on within 5 seconds after the power was turned on. Also, the discharge lamp FL
R110H / A and FLR110H / A ・ 100 are tube diameter φ38mm, nominal lamp power 110W and 100W, argon (Ar) gas or argon (Ar) + neon (Ne) + krypton (K
r) and other gases and mercury (Hg) in a few mHg sealed in a fluorescent lamp, as shown at point B in FIG. Water repellent treatment is carried out by this method and is generally called A type, which is specified in JIS C 7601.

According to the above-described experiment, the discharge voltage of the central discharge lamp 3 is increased by irradiating the central discharge lamp 3 with the light from the two discharge lamps 2 and 4 arranged on both sides thereof. Was found to be reduced by about 5% voltage (about 5% of rated voltage).

Further, the inventor of the present invention conducted the following experiment. The experiment is performed according to the same procedure as the above-mentioned experiment, with the reflection plate 6 being covered on the upper part of the lighting device for three lights similar to the above-mentioned experiment so as to collect the light. As a result, the starting voltage of the central discharge lamp 3 is 85% to 90% when the two discharge lamps 2 and 4 are not illuminated,
The starting voltage of the central discharge lamp 3 is 97.
The voltage was 5 to 105%. According to such experimental results,
It has been found that the light from the discharge lamps 2 and 4 on both sides impinges on the central discharge lamp 3 more strongly, so that the startability of the central discharge lamp 3 becomes worse.

According to the above two experimental results, the discharge lamps FLR110H / A and FLR110H / A.100 have a higher starting voltage when the light of other discharge lamps hits them, and the starting voltage becomes higher as the light increases. It became clear that it would be. As a result, as described above, the discharge lamps 2 and 4 that are lit by the series two-lamp rabit start lighting circuit are lit first, and the light from those discharge lamps 2 and 4 causes the central emission. The starting voltage of the electric lamp 3 is increased by about 5%, and in this case, the one lamp light start lighting circuit is configured so as to have a voltage as low as possible within a range in which the electric lamp 3 is reliably turned on. However, there is a problem in that the discharge lamp 3 cannot be turned on and the discharge lamp 3 cannot be turned on.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a multi-lamp lighting device having an odd number of discharge lamps, which has a simple structure and which is operated by a single-lamp lighting circuit. An object of the present invention is to provide a lighting device for a multi-lamp discharge lamp capable of reliably preventing non-lighting.

Means for Solving the Problems The present invention provides a first lighting circuit for rapid start lighting a plurality of discharge lamps connected in series, and a second lighting circuit for lighting a single discharge lamp rapid start. , Delaying the electric power supplied to the first lighting circuit with respect to the electric power supplied to the second lighting circuit, whereby a plurality of discharge lamps connected in series to the first lighting circuit are A lighting device for a multi-lamp discharge lamp, comprising: a delay circuit for lighting after a single discharge lamp connected to the second lighting circuit.

Further, the present invention includes a first lighting circuit for performing rapid start lighting of a plurality of discharge lamps connected in series, and a second lighting circuit for performing a rapid start lighting of a single discharge lamp. The capacity of the starting capacitor, which is connected in series to one of the plurality of discharge lamps connected to the lighting circuit, is set to be relatively small, and thereby, the starting capacitor is connected in series to the first lighting circuit. It is characterized in that the plurality of discharge lamps are lit after the single discharge lamp connected to the second lighting circuit.

Further, the present invention includes a first lighting circuit for rapid start lighting a plurality of discharge lamps connected in series, and a second lighting circuit for lighting a single discharge lamp rapid start. The single discharge lamp connected to the lighting circuit has better startability than the plurality of discharge lamps connected to the first lighting circuit, and thus is connected in series to the first lighting circuit. It is characterized in that the plurality of discharge lamps are lit after the single discharge lamp connected to the second lighting circuit.

According to the present invention, the delay circuit supplies the power to the second lighting circuit so that the power is supplied later than the power supplied to the first lighting circuit, whereby a plurality of discharges connected in series are provided. The single discharge lamp connected to the second lighting circuit can be lit earlier than the electric lamp. Thus, with a simple configuration, a single discharge lamp can be reliably turned on without being irradiated with light from a plurality of discharge lamps, and thus without increasing the starting voltage of the single lamp. You can

Further, according to the present invention, since the capacity of the starting capacitor provided in the first lighting circuit is set to be relatively small, the starting voltage of the first lighting circuit can be made lower than the starting voltage of the second lighting circuit. , A single discharge lamp that is lit by the second lighting circuit can be lit before the plurality of discharge lamps that are lit by the first lighting circuit. It is possible to reliably light a single discharge lamp.

Further, according to the present invention, since the startability of the single discharge lamp lit by the second lighting circuit is made better than the plurality of discharge lamps lit by the first lighting circuit, The discharge lamp can be lit before the multiple discharge lamps, so that the light from the multiple discharge lamps is not emitted to the single discharge lamp, and thus the single discharge lamp is It can be reliably turned on.

Embodiment FIG. 1 is an electric circuit diagram showing a basic structure of a lighting device 10 for a multi-discharge lamp according to an embodiment of the present invention, and FIG. 2 is a simplified lighting device 11 provided with the lighting device 10. FIG. Lighting device 11 provided with a lighting device 10 according to the present invention
A reflector 13 is fixed to a frame body 12 having a substantially U shape, and the reflector 13 is provided with sockets 14, 15 and 16. These sockets 14, 15, 16 are provided in pairs so as to face each other in the direction perpendicular to the paper surface of FIG. 2, and these sockets 14, 15,
Discharge lamps L1, L2, L3, such as fluorescent lamps, are detachably mounted between 16 units. These discharge lamps L1, L2, L3 are, for example, JIS
FLR110H / A or FLR110H / A ・ 10 specified by C 7601
0, tube diameter φ38mm, nominal lamp power 110W and 100W
And argon (Ar) gas or gases such as argon (Ar) + neon (Ne) + krypton (Kr) and mercury (H).
g) for several mHg, in order to improve startability, as described in the above-mentioned prior art, as shown at point B in FIG. 5, silicon coating is applied to the outer wall of the lamp tube. Therefore, it is a discharge lamp that has been subjected to water repellent treatment and is generally called A type and has a maximum tube wall resistance value.

The discharge lamps L1 and L3 are connected in series and are lit by the first lighting circuit 17 that performs rapid start lighting. The discharge lamp L2 is a second lighting circuit that performs rapid start lighting.
Lighted by 18. These discharge lamps L1 and L3 are arranged on both sides of the discharge lamp L2 arranged in the center of the lighting device 11. The first lighting circuit 17 includes a transformer 19, and a delay circuit 20 is connected to a shunt winding 40 of the transformer 19 via lines 1 and 12. Lines l3 and l4 are connected to the delay circuit 20 and are connected to the shunt winding 41 of the transformer 21 provided in the second lighting circuit 18. An AC power supply 22 is connected to these lines l3 and l4 through lines l5 and l6, and a power switch 23 is interposed in the line l5. By turning on the power switch 23, the discharge lamps L1 to L3 can be turned on, but the first lighting circuit 17 includes a delay circuit.
Since 20 is provided, the power supply voltage is supplied to the transformer 19 about 3 seconds after the power is turned on.
Therefore, the electric power from the second lighting circuit 18 is first supplied to the discharge lamp L2 to be turned on, and then the discharge lamps L1 and L3 are first turned on.
Electric power is supplied from the lighting circuit 17 to light up.
As a result, the discharge lamp L2 is arranged on both sides of the discharge lamp L2.
It can be turned on without receiving the light from L1 and L3, and as described in the above-mentioned prior art, there is no fear that the starting voltage will rise due to the light, and the lighting can be performed reliably.

The filament 24, which is the electrode of the discharge lamp L1, includes the transformer
The output of 19 is supplied via the lines l7 and l8, and the filaments 25 and 26 are supplied with the output of the transformer 19 via the lines l9 and 10. Further, the filament 27 of the discharge lamp L3 is provided with the output of the transformer 19 via lines 11 and 12. A starting capacitor C _S is connected between the lines l7 and l0, and discharge is performed between filaments 24, 25 and 26 and 27 of the discharge lamps L1 and L3.

Further, in the filament 28 of the discharge lamp L2 which is lit by the second lighting circuit 18, the output of the transformer 21 is supplied to the lines 13, 14
Via the transformer 21 to the other filament 29.
Is supplied via lines 15 and 16. The capacitors C _N provided in the first and second lighting circuits 17 and 18 are noise prevention capacitors connected in parallel to the discharge lamps L1 and L3 and the discharge lamp L2, respectively. Also the line L7,13, a parallel circuit composed of a resistor R and a capacitor C _M is interposed, respectively.

In such a configuration, when the power switch 23 becomes conductive, the power from the power source 22 is supplied to the lines l5, l6 and the lines l3, l4.
Through the delay circuit 20 provided on the first lighting circuit 17 side and the transformer 21 provided on the second lighting circuit 18.
The lines l3 and l4 and the lines 1 and 12 are cut off by the delay circuit 20 for about 3 seconds, for example. During the period in which the power to the first lighting circuit 17 is cut off, the line
The power input to the shunt winding 41 of the transformer 21 from l3 and l4 is
The filament 28 of the discharge lamp L2 is heated from the secondary winding 42 via the lines 13 and 14, and the filament 29 is heated by the electric power from the lines 15 and 16. As a result, discharge is started between filaments 28 and 29, and discharge lamp L
2 lights up.

In this way, after the discharge lamp L2 is turned on, that is, when, for example, 3 seconds have elapsed after the power switch 23 was turned on as described above, the delay circuit 20 is turned on and the transformer 19 of the first lighting circuit 17 is turned on.
The shunt winding 40 is supplied with electric power from the power supply 22. Transformer
The output from the secondary winding 43 of 19 is supplied to the filament 24 of the discharge lamp L1 via the lines l7 and l8, the filament 24 is heated, and the output from the secondary winding 44 is output to the line l9. The filament 25 is heated via 10 and 10. As a result, discharge is started between filaments 24 and 25.
Further, the filament 26 of the discharge lamp L3 is heated by the electric power supplied through the lines l9 and 10, and
27 is heated by the electric power supplied via lines 11 and 12. As a result, discharge is started between filaments 26 and 27.

As described above, the discharge lamp L2 arranged in the center of the lighting device 11 can be turned on first, and then the discharge lamps L1 and L3 arranged on both sides of the discharge lamp L2 can be turned on. As a result, the central discharge lamp L2 does not receive the light from the discharge lamps L1 and L3 on both sides, and therefore the starting voltage is unlikely to rise.

FIG. 3 is a schematic cross-sectional view of a lighting device 11a according to another embodiment of the present invention. In the above-described embodiment, the discharge lamp L2 arranged in the center is lit by the second lighting circuit 18, and the discharge lamps L1, L3 arranged on both sides thereof are lit by the first lighting circuit 17. But more than one discharge lamp L1
In the lighting device 11a provided with 0 to L14, the central discharge lamp L12 is lit by the second lighting circuit 18, and the two discharge lamps L10, L11; 1
You may make it provide the lighting device 10a each lighted by the lighting circuit 17.

As yet another embodiment of the present invention, the discharge lamp is provided by lowering the output voltage of the transformer 19 of the first lighting circuit 17 slightly.
The discharge lamps L1, L3; L10, L11; L13, L14 may be turned on later than L2, L12. In this case, the delay circuit 20 need not be provided. Further, instead of lowering the output voltage of the transformer 19, a starting capacitor C _S having a small capacity may be used, and further, the preheating voltage of the filaments 24 to 27 may be lowered.

As still another embodiment of the present invention, the output voltage between the lines l7 and 12 of the transformer 21 of the second lighting circuit 18 may be increased, and the preheating voltage of the filaments 28 and 29 of the discharge lamp L2 may be set to be higher. You may make it high.

As still another embodiment of the present invention, the discharge lamp L2 may be one having a good startability, that is, one having a low starting voltage or a short starting time. Specifically, the FLR110H / A used for the discharge lamp L2 is a general FLR110H / A with good startability, and the discharge lamps L1 and L3 contain krypton (Kr) gas to save power. The A.100 may be used, or the starting characteristics may be selected using the same type of discharge lamp to realize the above configuration.

Effect of the Invention According to the present invention, the plurality of discharge lamps that are lit by the first lighting circuit are configured to be lit after the single discharge lamp that is lit by the second lighting circuit. It is possible to prevent the starting voltage of the single discharge lamp from rising due to the light from the plurality of discharge lamps, and to reliably light the single discharge lamp with a simple configuration.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a basic configuration of a lighting device 10 for a multiple discharge lamp according to an embodiment of the present invention, and FIG. 2 is a lighting device 10 thereof.
FIG. 3 is a simplified cross-sectional view of a lighting device 11 equipped with the same, FIG. 3 is a simplified cross-sectional view showing a lighting device 11a according to another embodiment of the present invention, and FIG. 4 is a typical prior art cross-sectional view. FIG. 5 is a graph for explaining the starting performance of the discharge lamp included in the conventional lighting device shown in FIG. 10 ... Lighting device, 11 ... Lighting device, 17 ... First lighting circuit, 18 ... Second lighting circuit, 20 ... Delay circuit, L1, L2, L3 ...
… Discharge lamp

Claims (3)

[Scope of utility model registration request] 1. A first lighting circuit for rapid start lighting a plurality of discharge lamps connected in series, a second lighting circuit for rapid start lighting a single discharge lamp, and the first lighting circuit. The electric power supplied to the second lighting circuit is delayed relative to the electric power supplied to the second lighting circuit, whereby a plurality of discharge lamps connected in series to the first lighting circuit are connected to the second lighting circuit. And a delay circuit for lighting the discharge lamp after the single discharge lamp is operated. 2. A first lighting circuit for rapid start lighting a plurality of discharge lamps connected in series, and a second lighting circuit for lighting a single discharge lamp rapid start. The capacity of the starting capacitor, which is connected in series to one of the plurality of discharge lamps connected to the lighting circuit, is set to be relatively small, and thereby, the starting capacitor is connected in series to the first lighting circuit. A lighting device for a multi-lamp discharge lamp, wherein a plurality of discharge lamps are lit after a single discharge lamp connected to the second lighting circuit is lit later. 3. A first lighting circuit for lighting a plurality of discharge lamps connected in series in a rapid start mode, and a second lighting circuit for lighting a single discharge lamp in a rapid start mode. The single discharge lamp connected to the lighting circuit has better startability than the plurality of discharge lamps connected to the first lighting circuit, and thus is connected in series to the first lighting circuit. A lighting device for a multi-lamp discharge lamp, wherein a plurality of discharge lamps are lit after a single discharge lamp connected to the second lighting circuit.