JP2598521Y2 - High pressure discharge lamp lighting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high pressure discharge lamp lighting device having an instantaneous restart device for starting or instantaneously restarting and lighting a high-pressure Na lamp or the like.

[0002]

2. Description of the Related Art Generally, a high-pressure discharge lamp such as a high-pressure Na lamp is instantaneously restarted (for example, a high-pressure discharge lamp in a stable lighting state is turned off once due to an instantaneous power failure or the like, and then restarted immediately after the recovery from the instantaneous power failure). ) Requires a voltage that is ten to several tens of times higher than the voltage (several hundred volts to thousands of volts) required at the time of initial startup.

By the way, such a high voltage is generated,
In order to apply the voltage to the high-pressure discharge lamp, it is necessary to devise a dedicated high-voltage processing method of the igniter itself and to consider wiring. The high-voltage treatment method is devised as a state in which the high-pressure discharge lamp is difficult to maintain lighting (such as a situation in which the lamp voltage rises due to life, etc., making it impossible to maintain steady-state lighting), or the high-pressure discharge lamp itself comes off the socket. Under such circumstances, a method of stopping the operation of the igniter by a timer element is generally adopted.

[0004] As for wiring considerations, if there is a long feed line from the igniter to the lighting equipment, the high voltage pulse generated from the igniter becomes dull due to the inductance component of the feed line and the peak value decreases. A method of shortening the wiring length between the igniter and the high-pressure discharge lamp as much as possible, such as being housed inside the lighting fixture or being installed very close to the lighting fixture, is adopted.

On the other hand, the high-pressure discharge lamp ballast is large in both size and weight, and is generally installed outside the lighting equipment in most cases. FIG. 5 shows a block diagram of the high pressure discharge lamp lighting device having the above concept. In FIG.
₁ is a commercial power supply, B ₁ is a high-pressure discharge lamp ballast, DL is a high-pressure discharge lamp, and IG ₁ is a high-voltage pulse generator (so-called igniter) for instantaneous restart. TM ₁ is a commercial power supply V
When _{the first} tube current of the charging time or the high-pressure discharge lamp DL is instantly restarted high voltage pulse generating device IG ₁ is started operates for a preset time (about several seconds) has elapsed at the time of the sudden change to zero from a finite value instantaneous restart high voltage pulse generator IG ₁ is a timer device for stopping operation. F
₁ is a lighting fixture, LN _{1 to} LN ₃ are high-pressure discharge lamp stabilizers B ₁
A feed wiring to luminaire F ₁ from.

[0006] In the high pressure discharge lamp lighting device having the above configuration, the high voltage pulse generator IG for instantaneous restart is used.
₁ operates at a no-load output voltage of the high-pressure discharge lamp ballast B ₁ (hereinafter referred to as a no-load secondary voltage) to apply a high-voltage pulse to the high-pressure discharge lamp DL; the output voltage of the high pressure discharge lamp ballast B ₁ is adapted to stop operation when the reduced lamp DL is shifted to the lighting state. The timer device TM _1, after after a few seconds after or no-load secondary voltage after the occurrence turned commercial power supply V _1, and configured to stop the operation of the instant restart high voltage pulse generator IG ₁ I have.

[0007] The above-described high pressure discharge lamp lighting device configuration, setting the wiring so-called high voltage is applied between a instantaneous restart the high-voltage pulse generator IG ₁ and the high-pressure discharge lamp DL in the shortest at the same time is possible, high-voltage pulse generator IG ₁ for instantaneous restart timer device because the operation time is limited by the TM _1, the high-voltage instantaneous restart a safety hazard pulse generator IG ₁ The generation of the high-voltage pulse can be minimized.

However, since the high pressure discharge lamp lighting device of FIG. 5 has a structure in which a timer device TM ₁ for limiting the high-voltage pulse generating operation time of the apparatus IG ₁ for instantaneous restart luminaire F ₁ the power supply circuit of the timer device TM ₁ is required, in addition to the high-pressure discharge lamp 2 feeding the DL of the feed lines LN _1, LN ₂ as the feed line, the drawback that the third feed line LN ₃ required Occurs.

[0009] If, as also a timer device TM ₁ to the high pressure discharge lamp ballast B ₁ side, it is necessary to separate feed lines for control for instantaneous restart the high-voltage pulse generator IG _1. In addition, high voltage pulse generator IG ₁ for instantaneous restart
The start / stop of the operation have been carried out at the lighting and non-lighting of the high-pressure discharge lamp DL, the difference is basically used as a difference between the output voltage of the high pressure discharge lamp ballast B _1. Therefore, in order to operate the timer device TM _1, the power for driving the timer device TM ₁ is separately required.

FIG. 6 is a circuit diagram showing a high-pressure discharge lamp lighting device which can solve the above-mentioned difficulties of the high-pressure discharge lamp lighting device of FIG. 6, the same components as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted. L ₁ is a coil which is a limiting element as a stabilizer has an intermediate tap, a commercial power source via a series circuit of a voltage response switching device to Q ₁ capacitor C ₁ and a triac or the like from the intermediate tap It is connected to the V _1. Voltage response switching element Q ₁ is, the commercial power supply V ₁ by the trigger circuit TG ₁
In synchronization with each other, once every half cycle of the voltage. Trigger circuit TG ₁ is configured so as to stop the trigger operation for the voltage response switching element Q ₁ in a few seconds after the addition or after the no-load secondary voltage generation of the commercial power supply V ₁ by a timer device TM _2. B
₂ shows a high pressure discharge lamp ballast comprising adding a high pressure discharge lamp ballast B ₁ configuration in the above-described arrangement of FIG. 5 (constituting a booster).

PT is a pulse transformer, Q ₂ is a voltage responsive switch element, C ₂ is a capacitor, R ₁ is a resistor,
Whole constitutes the instantaneous restart high voltage pulse generator IG ₂ of voltage response type as. F ₂ is a lighting fixture. Next, the operation of the high pressure discharge lamp lighting device will be described with reference to FIG. Figure 7 shows a waveform diagram of a main portion of the high pressure discharge lamp lighting device of FIG. 6, (a) shows the waveform of the no-load secondary voltage of the high pressure discharge lamp ballast B _2, (b) high pressure discharge lamp ballasts Bowl B
₂ shows the waveform of the output voltage of the high-voltage pulse generator IG2 for instantaneous restart when a no-load secondary voltage is generated from ₂ , and a high-voltage pulse of tens to several tens of KV is applied to the high-pressure discharge lamp DL. This shows a state where the voltage is applied.

In this high pressure discharge lamp lighting device, when the commercial power supply V ₁ is turned on, the voltage responsive switch element Q ₁ is triggered by the trigger circuit TG ₁ every half cycle of the voltage of the commercial power supply V ₁ , and each time. commercial power supply V ₁ of the coil L ₁
The output voltage of the high pressure discharge lamp ballast B ₂ by oscillatory current side of the windings and through the capacitor C _1, FIG. 7
(A), the approximately 1 in voltage V _P1 (e.g. a peak value of the voltage that was somewhat boosted to the voltage of the commercial power supply V ₁
KV) are superimposed.

On the other hand, the breakover voltage V _Q2 of the voltage responsive switch element Q _{2 in} the instantaneous restart high voltage pulse generator IG ₂ is selected to be higher than the peak value of the voltage of the commercial power supply V ₁ and lower than the voltage V _P1. operates the voltage responsive switch element Q ₂ whenever the voltage response switching element Q ₁ operates, as the output of the instantaneous restart high voltage pulse generator IG _2, as shown in FIG. 7 (b), FIG. The waveform has a waveform in which the high voltage pulse _VP2 is superimposed on the voltage of (a).

The high-voltage pulse V _P2 has a voltage value high enough to instantaneously restart the high-pressure discharge lamp DL. For some reason, the commercial power supply V ₁ momentarily loses power, and the high-pressure discharge lamp DL goes out. assuming a state where commercial power supply V ₁ is being cycled, the high-pressure discharge lamp DL, a voltage as shown in FIG. 7 (b) is applied, the high-pressure discharge lamp DL is restarted instantaneously. When the high pressure discharge lamp DL is restarted, the high-pressure discharge lamp DL in the low impedance connected in parallel to the vibration system which consists of a winding and a capacitor C ₁ of the commercial power supply V ₁ side of the coil L ₁ described above, weakened vibration condition, the voltage across the voltage response switching element Q ₂ is lower than the voltage V _Q2, the high-voltage pulse generator IG ₂ for instantaneous restart stops generating the high voltage pulse V _P2.

Further, if the high-pressure discharge lamp DL is out of the circuit, the above phenomenon (return on of the commercial power supply V ₁ )
If occurs, only time determined by the timer unit TM _2, but instantly restart the high-voltage pulse generator IG ₂ is operated by the action of the timer device TM ₂ in a few seconds, the trigger circuit T
The operation of the G ₁ is stopped, the instantaneous restart high-voltage pulse generator IG ₂ is no longer operate.

The above mentioned such high pressure discharge lamp lighting device of FIG. 6 is basically the same operation as the high pressure discharge lamp lighting device of FIG. 5, the luminaire F ₂ from the high pressure discharge lamp ballast B ₂ This is superior to that of FIG. 5 in that the number of sending wirings to this is two, which is one less than the conventional example of FIG.

[0017]

An invention is, however, a high pressure discharge lamp lighting device of FIG. 6, as the high pressure discharge lamp ballast B _2,
In addition to the function of the original ballast, a boosting function for generating the voltage _VP1 as shown in FIG. 7A is required, and it is necessary to specialize the ballast unit. There was a drawback that made it impossible to use.

Therefore, an object of the present invention is to provide a high-pressure discharge lamp lighting device which requires only two feed wires, does not require the dedicated use of a high-pressure discharge lamp ballast, and can instantaneously restart the high-pressure discharge lamp without any trouble. It is to provide.

[0019]

The high pressure discharge lamp lighting device of the present invention has a high pressure discharge lamp ballast connected to an AC power supply, and a booster arranged near the high pressure discharge lamp ballast to stabilize the high pressure discharge lamp. A booster is connected to the output terminal of the high pressure discharge lamp ballast so that a voltage having a peak value higher than the peak value of the output voltage of the high pressure discharge lamp ballast when there is no load is superimposed on the output voltage of the high pressure discharge lamp ballast. In addition, a timer device is placed near the high-pressure discharge lamp ballast, and when the AC power is turned on or when the tube current of the high-pressure discharge lamp suddenly changes from a finite value to zero, the boost device is started to operate, and then the timer set time elapses When the pressure rises, the operation of the booster is stopped. In addition, the voltage at which the breakover voltage is set to a voltage value higher than the peak value of the output voltage of the high-pressure discharge lamp ballast when no load is applied and lower than the output voltage of the booster through the sending wire to the high-pressure discharge lamp ballast. A high voltage pulse generator for responsive instantaneous restart is connected to generate a high voltage pulse for instantaneous restart of the high pressure discharge lamp. A high-pressure discharge lamp is connected as a load of the instantaneous restart high-voltage pulse generator.

[0020]

According to the structure of the present invention, the booster starts operating when the AC power is turned on or when the tube current of the high-pressure discharge lamp suddenly changes from a finite value to zero due to the action of the timer device.
A voltage having a higher peak value than the no-load output voltage of the high-pressure discharge lamp ballast is superimposed on the output voltage of the high-pressure discharge lamp ballast. As a result, the voltage-responsive instantaneous restart high-voltage pulse generator operates to generate a high-voltage pulse for instantaneous restart of the high-pressure discharge lamp, and the high-pressure discharge lamp is first started or instantly restarted. When the high-pressure discharge lamp is started and turned on, the voltage applied to the instantaneous restart high-voltage pulse generator decreases, so that the generation of the high-voltage pulse is stopped. In addition, even if the high-pressure discharge lamp is disconnected and the voltage applied to the instantaneous restarting high-voltage pulse generator does not decrease, the operation of the booster is automatically stopped by the operation of the timer device.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a circuit diagram showing a configuration of a high pressure discharge lamp lighting device according to a first embodiment of the present invention. 1, the same components as those in FIGS. 5 and 6 are denoted by the same reference numerals.

This high-pressure discharge lamp lighting device has a commercial power supply V _1.
High-pressure discharge lamp ballast B _1
1 to connect the instantaneous restart high voltage pulse generator IG ₂ through two feed lines LN _1, LN _2, by connecting a high-pressure discharge lamp DL as a load of the instantaneous restart high voltage pulse generator IG ₂ I have. Instantaneous restart high voltage pulse generator IG ₂ and the high-pressure discharge lamp DL is lighting fixture F ₂
High-pressure discharge lamp ballast B ₁ represents are disposed apart as.

The booster IG _3, as shown, provided in the vicinity of the high pressure discharge lamp ballast B ₁ and separately from the high pressure discharge lamp ballast B ₁ to the output terminal of the high-pressure discharge lamp ballast B ₁ The capacitor C ₁ , the voltage response switch element Q ₁ , and the trigger circuit T in the high pressure discharge lamp ballast B ₂ shown in FIG.
The same operation as the coil L ₁ dated G ₁ and tap is performed in conjunction with the high pressure discharge lamp ballast B _1. The timer device TM ₃ also, the high pressure discharge lamp ballast B ₁ high pressure discharge lamp ballast is provided in the vicinity of the high pressure discharge lamp ballast B ₁ and separately from the B ₁
It is connected to the input terminal, and performs the same operation as the high-pressure discharge lamp ballast B ₂ definitive timer device TM ₂ shown in FIG. Note that the timer device TM ₃ is not shown, by receiving a signal of current detecting means for detecting a tube current of the high pressure discharge lamp DL, the lamp current of the high pressure discharge lamp DL is suddenly changed to zero from a finite value It has a structure to activate the booster IG ₃ even at the point.

[0024] That is, the booster IG ₃ superimposes a voltage having a higher peak value than the peak value of the no-load secondary voltage of the high pressure discharge lamp ballast B ₁ to the output voltage of the high pressure discharge lamp ballast B ₁ Like that. In addition, the timer device TM ₃
It is introduced at or high of the commercial power supply V ₁ discharge lamp D
When the tube current of L suddenly changes from a finite value to zero (when the high-pressure discharge lamp DL goes out, for example), the booster IG ₃
Is started and the time set beforehand (about several seconds)
There has be stopped operating the booster IG ₃ when passed.

The lighting fixture F ₂ has the same configuration as that of FIG. 6, and is higher than the peak value of the no-load secondary voltage of the high-pressure discharge lamp ballast B ₁ and lower than the output voltage VP ₁ of the booster IG _3. from the instantaneous restart high voltage pulse generator IG ₂ which sets the voltage value to the breakover voltage, high-pressure discharge lamp D
Generate a high voltage pulse for instantaneous restart of L. With the configuration described above, the high pressure discharge lamp lighting device, booster IG when the tube current of the charging time or the high-pressure discharge lamp DL of the commercial power supply V ₁ is suddenly changed to zero from a finite value in the action of the timer device TM _{3 3} starts operation and the high-pressure discharge lamp ballast B
Superposing a voltage having a higher peak value than the peak value of the _first no-load secondary voltage in no-load secondary voltage of the high pressure discharge lamp ballast B _1. As a result, to generate a high voltage pulse for instantaneous restart of the high-pressure discharge lamp DL is instantly restarted high voltage pulse generator IG ₂ voltage responsive to operation, initial start-up or instantly restart the high-pressure discharge lamp DL Let it. When the high pressure discharge lamp DL is lighted by starting, the voltage applied to the high-voltage pulse generator IG ₂ for instantaneous restart decreases, it stops generating the high voltage pulse. Also, though out high-pressure discharge lamp, without fall voltage applied instantaneously for restarting the high-voltage pulse generator IG _2, the operation of the booster IG ₃ by the action of the timer device TM ₂ is automatically stopped.

[0026] FIG. 2 is a circuit diagram showing a specific construction of the booster IG ₃ and the high-pressure discharge lamp ballast B ₁ in FIG. 1.
In FIG. 2, C ₃ is a capacitor, Q ₃ is a voltage responsive switch element, and TG ₂ is a trigger circuit. The capacitor C ₁ , voltage responsive switch element Q ₁ and trigger circuit T in FIG.
Each provides the same function as the G _1. L ₂ is a coil which is current limiting element of the ballast.

The operation of the circuit shown in FIG. 2 will be described below. FIG.
In the circuit of, for each of conduction voltage response switching element Q ₃ in each half cycle of the voltage of the commercial power supply V _1, the resonance voltage of the conduction period only the capacitor C ₃ of the voltage response switching element Q ₃ is the coil L ₂ Will appear as shown in FIG. The broken line in FIG. 3 illustrates the voltage across the capacitor C ₃ in the OFF state of the voltage response switching element Q _3. Capacitor C occurring during the on period of the voltage response switching element Q ₃
By setting ₃ of the peak value of the voltage V _P1 higher than the break-over voltage of the instantaneous restart high voltage pulse generator IG _2, in the same manner as the circuit of FIG. 6, each half cycle of voltage of the commercial power supply V ₁ high voltage pulse for instantaneous restart instantly restart the high-voltage pulse generator IG ₂ is possible to start the high-pressure discharge lamp DL occurs in. Of course, the high-voltage pulse generator IG ₂ for instantaneous restart does not work in the voltage of the commercial power supply V ₁ was the same as that shown in FIG.

[0028] In the high pressure discharge lamp lighting device of this embodiment, the one which instantly restart the high-pressure discharge lamp DL, since the high pressure discharge lamp ballast B ₁ represents not a conventional example as well as special configuration of Figure 5, a high pressure It is not necessary to specialize the discharge lamp ballast B ₁ , and simply add the booster IG near the high pressure discharge lamp ballast B _1.
3 and disposed timer device TM _3, they only connected to the high pressure discharge lamp ballast B _1, without changing the existing wires, that further feed lines may also be a two LN _1, LN ₂ It works.

[0029] (Second Embodiment) FIG. 4 shows a circuit configuration of a portion of the booster IG ₄ in the high-pressure discharge lamp lighting device of the second embodiment of this invention. Other configurations are the same as those of the embodiment shown in FIGS. In FIG. 4, PT ₁ is a pulse transformer, Q
₄ is a voltage response switch element, C ₄ is a capacitor, TG ₃
Is a trigger circuit of the voltage response switching element Q _4.

[0030] In the configuration described above, the driving voltage instantaneous restart high voltage pulse generator IG ₂ includes the coil L ₂ and capacitor C ₃ of the high pressure discharge lamp ballast B ₁ as shown in FIG. 2 rather than obtained using the resonance, and configured so as to utilize the resonance of the pulse transformer PT ₁ and capacitor C ₁ which is provided separately from the coil L _2. That is, in the circuit of Figure 4, to charge the capacitor C ₄ by the output voltage of the high pressure discharge lamp ballast B _1, voltage response switching element Q ₄ which conducts once every half cycle of voltage of the commercial power supply V ₁
Through, vibrationally is discharged through the primary winding of the pulse transformer PT ₁ charges the capacitor C ₁ whenever the voltage response switching element Q ₄ conducts, instantaneous re secondary voltage of the pulse transformer PT ₁ generated during the discharge it is obtained by the use as high-voltage driving voltage of the pulse generator IG ₂ for the starting.

[0031] By providing a separate pulse transformer PT ₁ and coil L ₂ for resonance as described above, the vibration condition of the capacitor C ₄ in the circuit of FIG. 2 is a high pressure discharge lamp ballast B ₁
Is dominated by the inductance of the coil L _2, whereas the booster IG ₃ to each type has been a special design, the circuit of Figure 4, by a capacitor C ₄ and the pulse transformer PT _1, the booster IG ₄ since the generated voltage is substantially determined, it is possible to realize a common specification of when designing booster IG _2.

Other effects are the same as those of the high pressure discharge lamp lighting device shown in FIGS.

[0033]

According to the high pressure discharge lamp lighting device of the present invention, a booster for activating a voltage-responsive instantaneous restart high voltage pulse generator is provided in the vicinity of the high pressure discharge lamp ballast, and the AC power supply is provided. At the time of turning on or when the tube current of the high pressure discharge lamp suddenly changes from a finite value to zero, the booster is started to operate, and then the timer is stopped when the timer set time has elapsed. The high-pressure discharge lamp can be instantaneously restarted without any trouble only by wiring. Further, since the boosting device and the timer device are provided separately from the high-pressure discharge lamp ballast, it is not necessary to specialize the high-pressure discharge lamp ballast.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a high pressure discharge lamp lighting device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a specific configuration of a booster in FIG. 1;

FIG. 3 is a waveform chart showing an operation of the booster of FIG. 2;

FIG. 4 is a circuit diagram showing a configuration of a booster in a high pressure discharge lamp lighting device according to a second embodiment of the present invention.

FIG. 5 is a circuit diagram showing an example of a conventional high pressure discharge lamp lighting device.

FIG. 6 is a circuit diagram showing another example of a conventional high pressure discharge lamp lighting device.

7 is a waveform chart of each part showing the operation of the high pressure discharge lamp lighting device of FIG.

[Explanation of symbols]

V ₁ Commercial power supply B ₁ High-pressure discharge lamp stabilizer IG ₃ Boost device TM ₃ Timer device IG ₂ High-voltage pulse generator for instantaneous restart DL High-pressure discharge lamp LN ₁ , LN ₂ Send wiring

Claims (1)

(57) [Scope of request for utility model registration] 1. A high-pressure discharge lamp ballast connected to an AC power supply, and a no-load of the high-pressure discharge lamp ballast disposed near the high-pressure discharge lamp ballast and connected to an output terminal of the high-pressure discharge lamp ballast. A boosting device that superimposes a voltage having a peak value higher than the peak value of the output voltage on the output voltage of the high-pressure discharge lamp ballast; and A timer device for starting operation of the booster when the tube current of the high-pressure discharge lamp suddenly changes from a finite value to zero and then stopping the booster when a timer set time has elapsed, and a high-pressure discharge lamp ballast. The breakover voltage is set to a voltage value higher than the peak value of the output voltage of the high-pressure discharge lamp ballast when there is no load and lower than the output voltage of the booster, which is connected via wiring, and A voltage-responsive instantaneous restart high-voltage pulse generator that generates high-voltage pulses for instantaneous restart of a high-pressure discharge lamp, and a high-pressure discharge lamp connected as a load of the instantaneous restart high-voltage pulse generator High pressure discharge lamp lighting device equipped.