JPS5842599B2 - Hoden's ladybug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp lighting device, and more particularly to a lighting device capable of lighting an incandescent lamp in addition to a discharge lamp.

Generally, the circuit of a discharge lamp lighting device is designed to light only the discharge lamp.

Therefore, if an incandescent lamp with pure resistance is inserted into the current path to the discharge lamp, the voltage applied to the discharge lamp will decrease due to the voltage drop caused by the incandescent lamp, and the lighting condition of the discharge lamp will deteriorate. Or, even if the rated voltage is supplied to the discharge lamp, the resistance of the incandescent lamp causes the tube current of the discharge lamp to have a pause, causing flickering while the discharge lamp is lit, and in any case, Difficult to maintain well.

Moreover, the same drawback occurs not only with discharge lamps but also with incandescent lamps, and both discharge lamps and incandescent lamps have poor lighting conditions.

However, since the light color is biased when using only discharge lamps, it is necessary to light an incandescent lamp with a different light color and improve the emitted color by combining both light colors to provide optimal lighting. There is.

In this respect, the present invention provides an effective means that can almost completely solve the above-mentioned drawbacks.

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 shows an embodiment of the present invention, in which a discharge lamp FL is connected between the output terminals of the leakage transformer LT to form a slow-phase lighting circuit, and the discharge lamp FL is A series circuit of a high voltage generating circuit R and a current limiting capacitor C1 is connected between the terminals.

The high voltage generating circuit R may be any circuit that generates the high voltage necessary to start the discharge lamp FL, such as a well-known glow starter or a starter using a pulse transformer, but in this embodiment, is the rebound boost inductor L as shown.

A so-called oscillation type starter is used, which has a configuration in which a capacitor C8 is connected in parallel to a series circuit of a thyristor S and a capacitor C8.

On the primary side of the leaky transformer LT, a capacitor C2 having an appropriate capacity for noise prevention is connected in parallel to the primary winding W1, and a parallel circuit of the primary winding W1 and the capacitor C2 is connected to the primary winding W1. This is a configuration in which an incandescent lamp IL is inserted in series and connected to a power source E.

The capacitance of the capacitor C2 is calculated by vector-synthesizing the leading phase current flowing through the capacitor C2, the slow phase current that is a combination of the slow phase current flowing through the primary winding W1, and the slow phase current flowing through the discharge lamp FL during lighting. The capacitance is set to an appropriate value necessary to make the current approximately in phase with the power supply voltage.

Further, the incandescent lamp IL is determined depending on the relationship with the amount of light emitted by the discharge lamp FL.
When 0H is used, an incandescent lamp IL with power consumption of about 100 W is used.

In the figure, Wf and Wf are the filament of the discharge lamp FL)
This is a filament winding for heating f and f'.

Next, the operation of the lighting device will be explained.

When the power supply E is connected, the power supply voltage is applied to the capacitor C2 and the primary winding W1 via the incandescent lamp IL.

A voltage is induced between the output terminals 49 of the leakage transformer LT, and the induced voltage is applied to the discharge lamp FL and the high voltage generation circuit R.

At the same time, voltage is also induced in the filament windings Wf, Wf', causing the filaments f, f of the discharge lamp FL to
Start heating.

However, since the filaments f and f are gradually heated, immediately after connecting the power source E, the discharge lamp PL
The required starting voltage is high.

Therefore, even if a voltage is applied between the output terminals of the discharge lamp FL, it cannot be started.

Therefore, since no tube current flows in the discharge lamp FL, the incandescent lamp IL has a leading phase current flowing in the capacitor C2 and a primary winding W.
Only a relatively small current, which is a vector combination of the slow-phase currents flowing in the lamp 1, flows, and does not reach the point where the incandescent lamp IL lights up.

On the other hand, when the voltage induced between the output terminals 42 is applied to the high voltage generation circuit R, the thyristor S turns on and bounces off the capacitor C8 and the boost inductor L.

operates in oscillation and generates a high voltage with a high frequency.3However, while the oscillation continues, the current limiting capacitor C1 is charged and its terminal voltage gradually rises, so the voltage distributed to the capacitor C8 gradually decreases, and
When the voltage difference between the output terminal voltage and the terminal voltage of the capacitor C1 becomes less than the breakover voltage vBom of the thyristor S, the thyristor S is kept in an off state, and the terminal voltage of the capacitor C1 is kept at a constant value.

Therefore, the oscillation operation is stopped during the subsequent half cycle of the power supply voltage.

In the next half cycle, when the voltage difference between the output terminal voltage and the terminal voltage of the capacitor C1 exceeds the breakover voltage VBO of the thyristor S, the thyristor S turns on again and starts oscillating.

Then, the terminal voltage of the capacitor C1 is discharged and the polarity of the capacitor C1 is reversed.

However, after that, charging continues in the same way as in the first half cycle, and the voltage difference between the output terminal voltage and the terminal voltage of capacitor C1 becomes less than the breakover voltage VBO of thyristor S, and thyristor S is turned off again. oscillation operation is stopped.

Thereafter, the input current flows intermittently to the high voltage generating circuit R only during the period required for the rapid inversion operation of the capacitor C1 in each half cycle as described above, and the high voltage generating circuit R generates a high frequency high voltage only during this period.

The high voltage generated in the above operation is applied between the terminals of the discharge lamp FL from the beginning when the power source E is connected.

Then, when the filaments f and f are sufficiently heated and the voltage required for starting the discharge lamp FL is lowered to such an extent that the voltage required for starting the discharge lamp FL is lowered, the discharge lamp FL is started by the high voltage and is lit in a delayed phase.

- When the light is turned on, the light is continued by the voltage applied between the output terminals.

Incidentally, at the same time as lighting, a tube current flows through the discharge lamp FL and the terminal voltage of the discharge lamp FL decreases, so the voltage applied to the high voltage generation circuit R is no longer sufficient to turn on the thyristor S, and the oscillation operation is then stopped. .

When the discharge lamp FL is turned on in this way, the tube current of the discharge lamp PL (large value of slow phase current) flows through the incandescent lamp IL.
and the slow phase current flowing through the primary winding W1 and the capacitor C2.
A large current having substantially the same phase as the power supply voltage, which is a vector combination of the advanced phase currents flowing through the lamps, flows, and the incandescent lamp IL is lit at the same time as the discharge lamp FL.

In this case, the current flowing through the incandescent lamp IL and the tube current of the discharge lamp FL have a large phase difference due to the phase-advanced current caused by the capacitor C2, so the incandescent lamp IL is lit with a predetermined amount of light emission. Therefore, even if a large current is passed and the voltage drop between the terminals is increased, sufficient tube current can be passed to keep the discharge lamp FL lit, and both can be lit.

Moreover, since the discharge lamp PL is directly connected between the output terminals of the leaky transformer LT, the secondary winding W2 of the leaky transformer LT functions as a slow phase current limiter. Since no pause is caused in the tube current, the discharge lamp F''L maintains a comfortable lighting condition without flickering.

When both the discharge lamp FL and the incandescent lamp IL are lit in good condition in this way, the combination of their different emission colors allows for comfortable illumination that could not be achieved by lighting only the discharge lamp FL. .

In the above configuration, by connecting a capacitor C2 of an appropriate capacity, the current flowing through the incandescent lamp IL can be changed, and the amount of light emitted from the lamp IL can be adjusted.

In addition, in the above structure, since the incandescent lamp IL is connected to the primary side, a commercially available socket with a low rated voltage can be used as the socket, which has the advantage that it can be constructed at a low cost.

Next, another embodiment according to the present invention will be described.

2 and 3 show embodiments on each side, and the one shown in FIG. 2 has a phase advance capacitor C3 inserted in series with the discharge lamp FL, so that a phase advance current flows through the discharge lamp FL. The incandescent lamp IL is interposed between the primary winding W1 and the secondary winding W2 of the leaky transformer LT, and the connection point between the incandescent lamp IL and the secondary winding W2 is formed. From power supply E
In this configuration, the inductor L is connected to one end of the inductor L.

In this configuration, the inductor L causes the phase of the current flowing through the incandescent lamp IL to be approximately in phase with the voltage of the power source E by the slow phase current flowing therein, thereby improving the power factor of the lighting device and lighting the discharge lamp FL. It functions to flow the phase-advanced current necessary to

Therefore, according to this configuration, similar to the configuration shown in FIG.
The discharge lamp PL can illuminate both the discharge lamp FL and the incandescent lamp IL without flickering.The configuration shown in FIG. A series circuit consisting of a phase advance current limiting device z3 consisting of a linear inductor L and a discharge lamp h is connected, and a current limiter z3 consisting of a linear inductor L and a discharge lamp h is connected, and a current limiter z3 is connected to the linear inductor L4 across both ends of the primary winding W1 and the secondary winding W2. This is a two-lamp lighting device in which a series circuit of a slow-phase current limiter Z4 and a discharge lamp FL2 is connected, and the incandescent lamp IL has a current path to the discharge lamp FLt through which a fast-phase current flows, and a current path through which a slow-phase current flows. It is inserted in the position before the branch point with the current path to the discharge lamp FL2, where the combined current of both sides flows.

With this configuration, a current is passed through the incandescent lamp IL to cause it to emit a predetermined light, while a good lighting condition is maintained without causing flickering through the required current that does not have phase-advance or phase-lag pauses through the discharge lamps FL1 and FL2. can be maintained.

To summarize the above, according to the present invention, a current path through which a current that is a combination of a leading phase current and a slow phase current flows is selected, and an incandescent lamp is inserted therein, so that the incandescent lamp is caused to emit a predetermined light. Moreover, the discharge lamp can be lit in good condition without flickering, and the purpose stated at the beginning is accomplished.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing one embodiment of the invention, and FIGS. 2 and 3 are circuit diagrams showing embodiments of each side of the invention. FL...discharge lamp, 23.2. ...Current limiting device, E...
・Power supply, R...High voltage generation circuit, IL...Incandescent lamp.

Claims (1)

[Claims] 1. A discharge lamp lighting device comprising a series circuit of a discharge lamp and a phase-leading or phase-lag current limiting device substantially connected to a power source, and a high-voltage generating circuit for starting the discharge lamp added. A current path is provided through which a current having a phase opposite to that of the current flowing through the discharge lamp flows, and a current path through which a current that is a combination of the current flowing through this current path and the current flowing through the discharge lamp flows is selected, and an incandescent lamp is installed in this current path. A discharge lamp lighting device characterized by being equipped with.