JPH05101896A - Stroboscopic device - Google Patents

Abstract

PURPOSE:To prevent luminous missing at the time of a high-speed repeating luminous operation time by always impressing charge voltage of a main capacitor and a capacitor for boosting in a superimposing manner between the main electrodes of a flash discharge tube at ON-time of insulated gate type bipolar transistor(IGBT). CONSTITUTION:When DC high-voltage power supply 1 starts operation, a main capacitor 2 is charged. Simultaneously, charging of the capacitors for boosting 17, 20, a capacitor 33 for a trigger is performed through charging resistance 24, diodes 13, 14 and 21, 22 (or a trigger transformer 34) respectively. When a luminous starting signal is inputted into a driving control circuit 25, the circuit 25 supplies ON voltage to an IGBT for turning it ON. Then, charging charge of a capacitor 33 is emitted through IGBT and a primary winding of a trigger transformer 34 so as to excite a flash discharge tube 5 by induced high-voltage of a secondary winding. Charging voltage of the capacitors 2, 17, 20 is impressed in superimposition between main electrodes of a discharge tube 5 through the IGBT, the main capacitor 2 and Trs 16, 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor) for controlling the light emitting operation of a flash discharge tube in series.
r; hereinafter, I. G. B. T. The present invention relates to a strobe device having a voltage supply system to the flash discharge tube, which is effective when light is repeatedly emitted at high speed.

[0002]

2. Description of the Related Art Conventionally, I.D. G. B. T.
An example of a strobe device using the above is Japanese Patent Laid-Open No. 64-170.
The device shown in Japanese Patent No. 33 is well known.

This device, as shown in FIG.
A DC high-voltage power source 1 which is a C-DC converter circuit, a main capacitor 2 charged by the power source 1, a constant voltage circuit 3 which is installed in the power source 1 and supplies a constant voltage to a light emission control circuit 7 described later, and a flash discharge tube 5. A control circuit 6 which is connected to a publicly known trigger circuit 4 for triggering, and a control means 8 in the camera body to generate various output signals such as a trigger signal for exchanging various signals to operate the trigger circuit 4. , I. series connected with flash discharge tube 5. G. B. T.
And a light emission control circuit 7 for controlling the on / off of the flash discharge tube 5 and a voltage doubler circuit for applying a high voltage about twice the charging voltage of the main capacitor 2 between the main electrodes of the flash discharge tube 5. 9 and 9.

When the switch Sw is turned on in the above device, the DC high-voltage power supply 1 is operated, and the main capacitor 2 and the voltage doubler capacitor 9a are charged by the high voltage output from the DC high-voltage power supply 1 as shown by the polarity. Further, the low-voltage power source E functions as a power source for the control circuit 6 and a power source capacitor C.
e is charged, and the capacitor 3a of the constant voltage circuit 3 is also charged. Therefore, the control circuit 6 starts the operation, and the light emission control circuit 7 is in the light emission preparation state.

When a light emission start signal is input from the control means 8 to the control circuit 6 while the above-mentioned respective capacitors are charged, the control circuit 6 operates and outputs a high level signal from the output terminal Oa to emit light. Transistor Q of control circuit 7
Turn on a and Qb.

When the transistors Qa and Qb are turned on, the I.V. G. B. T. Turns on. Therefore, the voltage doubler circuit 9 operates and the voltage doubler capacitor 9
At the same time that the charging voltage of a is applied between the main electrodes of the flash discharge tube 5, the trigger circuit 4 also operates to excite the flash discharge tube 5, and as a result, the flash discharge tube 5 consumes the charge stored in the main capacitor 2. And will emit light.

During the light emission, when a light emission stop signal is input to the control circuit 6 from the control means 8, the control circuit 6 operates and outputs a high level signal from the output terminal Ob to output the transistor Qc of the light emission control circuit 7. Turn on Qd. As a result, the transistor Qb that has been on until then,
I. G. B. T. Is turned off, and as a result, the light emission of the flash discharge tube 5 is stopped.

The above-described operation is the basic operation of the conventional apparatus shown in FIG.

[0009]

I. Problems to be Solved by the Invention G. B. T. The strobe device using is known, and unlike the conventional device in which light emission is stopped by using a commutation capacitor, overlight emission does not occur, high-speed repetitive light emission operation, and device size can be reduced.

However, when the high-speed repetitive light emitting operation is examined in detail, it still has the following problems.

That is, when the cycle of the high-speed repetitive light emitting operation becomes a high cycle of a predetermined cycle or more, for example, a certain cycle band of several tens Hz or more, in the configuration shown in FIG. 3, the voltage doubler capacitor 9a is sufficiently charged. It is conceivable that the next light emitting operation will be performed before it is performed, and in such a case, since the action of the voltage doubler circuit 9 cannot be expected, the flash discharge tube 5 cannot be made to emit light and light emission is lost. It has the following disadvantages.

More specifically, the voltage doubler capacitor 9
The charging of a is started only when the cathode potential of the flash discharge tube 5 is set to the low level, in other words, the charging is not performed when the cathode potential of the flash discharge tube 5 is at the high level from the circuit configuration shown in the drawing. it is obvious.

By the way, the cathode potential is the same as that of the flash discharge tube 5.
Once emits light, the period until the ionized state ends and the state returns to the initial state even if the energy supply is stopped,
It is well known that a high potential is maintained, and the voltage doubler capacitor 9a has an appropriate charging time constant, and therefore,
If the next light emission operation is performed at the time period described above, or even after the time period has passed and the time constant has not passed, the voltage doubler capacitor 9a is not sufficiently charged, As a result, the action of the voltage doubler circuit 9 cannot be expected.

In the case of an extremely high cycle exceeding the above-mentioned certain cycle band, the operation for the next light emission is performed when the flash discharge tube 5 is in a state where it can emit light without being triggered. Therefore, the flash discharge tube 5 emits light very easily, and it is well known that the above-mentioned light emission omission does not occur.

On the other hand, when considering downsizing and increasing the amount of emitted light in the flash discharge tube, a method of increasing the internal gas pressure to increase the impedance is well known, but such a method is the discharge of the flash discharge tube. It is known that the starting voltage rises. In addition, considering the high-speed repetitive light emitting operation, the heat dissipation characteristics are deteriorated due to the miniaturization, and the heat storage characteristics are improved due to the high impedance. Is considered to increase, and in consideration of the above situation, the fact that the action of the voltage doubler circuit cannot be expected becomes more and more disadvantageous in the light emission of the flash discharge tube.

The present invention has been made in consideration of the above disadvantages, and the charging voltage of a plurality of boosting capacitors can be superimposed on the charging voltage of the main capacitor and applied between the main electrodes of the flash discharge tube. That is, the voltage between the main electrodes of the flash discharge tube at the time of starting the light emitting operation is controlled to a high voltage value which is about (n + 1) times the charging voltage of the main capacitors, where n is the number of the boosting capacitors. An object of the present invention is to provide a strobe device capable of adopting a flash discharge tube having a small size and high impedance, which can surely perform the next light emitting operation during high-speed repeated light emitting operation of several tens Hz or more.

[0017]

The strobe device according to the present invention comprises a DC high voltage power supply, a main capacitor connected to both ends of the DC high voltage power supply, a flash discharge tube, a first diode, an I.D. G. B. T. A first series connection body connected to both ends of the main capacitor and a plurality of second diodes connected in series, and a second series connection connected to both ends of the first diode. A connecting body, a control switch element having a control pole, and a boosting capacitor are connected in series, and a plurality of series bodies connected to both ends of each of the plurality of second diodes and an anode are the control switch. A plurality of third diodes connected to the connection point between the element and the boosting capacitor and having a cathode connected to the low potential side terminal of the main capacitor, and connected to the cathode of the flash discharge tube via the second diode. Charging means for charging each of the plurality of boosting capacitors via the second and third diodes so that the terminal on the side to be charged has a high potential, and operating in response to the supply of the light emission start signal, A switch control means allowed to operate the serial control switch element, the I. G.
B. T. Control whether ON voltage is supplied to the control pole of
The above I. G. B. T. Drive control means for controlling the on / off state of and the trigger circuit for exciting the flash discharge tube by operating the drive control means.

[0018]

Since the strobe device according to the present invention is configured as described above, the plurality of boosting capacitors are connected to the terminal connected to the second diode by the charging means, that is, the cathode side of the flash discharge tube. The terminal is charged so that it has a high potential.

When the switch control means operates in response to the supply of the light emission start signal and the plurality of second control switch elements are turned on, the I.D. G. B. T. When is on, the charging voltage of each of the boosting capacitors is
I. G. B. T. , Is applied between the main electrodes of the flash discharge tube via the main capacitor, the control switch element and other boosting capacitors. Therefore, the voltage between the main electrodes of the flash discharge tube is n times the number of the boosting capacitors.
Then, it is controlled to a high voltage value which is about (n + 1) times the charging voltage of the main capacitor.

As a result, when the trigger circuit operates during the above-mentioned operation and the flash discharge tube is excited, the flash discharge tube easily starts its light emitting operation, that is, the charge stored in the main capacitor is consumed. It emits light.

On the other hand, the I.D. G.
B. T. When is turned off, the discharge loop of the main capacitor and the boosting capacitor is interrupted, the flash discharge tube is in the ionized state, its light emission is stopped, and the boosting capacitor is ready for charging.

When the flash discharge tube is in an ionized state, its cathode potential becomes high, but in the present invention, a second diode is provided which connects one end of the boosting capacitor to the cathode of the flash discharge tube. Therefore, the boosting capacitor is G. B. T. The charging by the high electric potential of the cathode is started from the time of turning off.

This charging is different from the charging by the above-mentioned charging means and is performed through the flash discharge tube in the ionized state and the second and third diodes, and the charging time constant can be set extremely small. become. That is,
The step-up capacitor according to the present invention is an I.V. G. B. T.
When is turned off, it will be charged instantly, and as a result,
Even when the light emitting operation is repeatedly performed at a high cycle, the charging voltage of the boosting capacitor can be always applied to the flash discharge tube, and the repetitive light emitting operation can be realized without causing light emission omission.

[0024]

1 is an electric circuit diagram showing an embodiment of a strobe device according to the present invention. In the figure, elements having the same reference numerals as those in FIG. 3 have the same function.

A main capacitor 2 is connected to both ends of a DC high-voltage power supply 1 including a well-known DC-DC converter circuit and a laminated power supply.

A flash discharge tube 5 is provided at both ends of the main capacitor 2.
And the first diode 11 and I. G. B. T. A first series connection body 10 in which and are connected in series is connected.

A plurality of electrodes are provided on both ends of the first diode 11,
For example, a second series connection body 12 formed by connecting two second diodes 13 and 14 in series is connected.

A transistor 16 as a control switch element having a control pole and a boosting capacitor 17, and a transistor 19 as a control switch element and a boosting capacitor 20 are respectively connected in series at both ends of each of the second diodes 13 and 14. Two connected series bodies 15 and 18 are connected.

Connection points A and B between the transistors 16 and 19 and the boosting capacitors 17 and 20 and the main capacitor 2 respectively.
The anode is connected to the low potential side terminal of
Two third diodes 21 and 22 which are connected to B and whose cathode is connected to the low potential side terminal are connected.

The charging resistor 24 is composed of the second diodes 13, 1
The charging means 23 for charging each of the two boosting capacitors 17 and 20 through the third diode 4 and the third diode 21 and 22 so that the terminal on the side connected to the cathode of the flash discharge tube 5 has a high potential. Form.

I. G. B. T. The gate of the I.V. controls the presence or absence of the supply of the ON voltage to the gate, and the I.V. G. B. T.
Is connected to the output terminal 25b of the drive control circuit 25 for controlling the on / off state of the.

The drive control circuit 25 receives the I.D. signal from the output terminal 25b in response to the supply of the light emission start signal to the input terminal 25a.
G. B. T. The on-voltage of the above I. G. B.
T. Is turned on, the output of the on-voltage is stopped in response to the supply of the light emission stop signal to the input terminal 25a, and the I.V.
G. B. T. The operation of turning off, that is, I.
G. B. T. Is controlled so that is turned on only during the light emitting operation.

Resistors 27 and 28 and resistors 30 and 3 are provided for the bases and emitters of the transistors 16 and 19, respectively.
1 and the I.V. of the boosting capacitors 17 and 20. G.
B. T. Discharge circuit 2 forming a discharge loop through
6, 29 are connected.

The discharge circuits 26 and 29 supply the voltage generated in the resistors 28 and 31 during the formation of the discharge loop between the base and emitter of each of the transistors 16 and 19 to turn on the transistors 16 and 19.

That is, the discharge circuits 26 and 29 form switch control means for switching the transistors 16 and 19 at the time of forming the discharge loop, and at the time of forming the discharge loop, the I.V. G. B. T. However, since the operation is controlled by the drive control circuit 25 which operates in response to the supply of the light emission start signal, it is needless to say that it is a time point in response to the supply of the light emission start signal.

Further, it is composed of a trigger capacitor 33 and a trigger transformer 34. G. B. T. The trigger circuit 32 that excites the flash discharge tube 5 by the discharge of the trigger capacitor 33 through the trigger transformer 34 or the like by turning on the I.V. G. B. T. Connected to both ends of.

The operation of the embodiment of the flash device according to the present invention shown in FIG. 1 will be described in detail below.

Now, when the DC high-voltage power supply 1 starts to operate by turning on an appropriate power switch (not shown), the main capacitor 2 is charged to the polarity shown by the DC high voltage output between its output terminals. Be seen.

At the same time, the charging of the boosting capacitors 17 and 20 and the trigger capacitor 33 to the polarities shown in the figure is performed by charging the charging resistor 24 as the charging means 23 and the second diodes 13 and 14 and the third diodes 21 and 22 or the above charging resistors. 24, the second diodes 13 and 14, and the trigger transformer 34.

When a light emission start signal is supplied to the input terminal 25a of the drive control circuit 25 at an appropriate point in time when the main capacitor 2 and the like are charged, the drive control circuit 25 operates and its output terminal 25b outputs the signal. I. G. B.
T. Output the on-voltage of the I.V. G. B. T. Supply to the gate.

Therefore, the I.D. G. B. T. Turns on when it receives the on-voltage.

I. G. B. T. When is turned on, the charging charge of the trigger capacitor 33 is I.S. G. B. T. Also, the flash discharge tube 5 is excited by the high voltage emitted through the primary winding of the trigger transformer 34 and induced in the secondary winding.

At the same time, the charge charged in the boosting capacitors 17 and 20 is the same as the above-mentioned I.S. G. B. T. And the discharge circuit 26 or the discharge circuit 29, respectively.

Therefore, the voltage drop generated in the resistor 28 or 31 forming the discharge circuit 26 or 29 is applied to the base of the transistor 16 or 19, respectively, and both transistors 16 and 19 are turned on.

Therefore, between the main electrodes of the flash discharge tube 5,
I. G. B. T. , A voltage obtained by superposing the charging voltage of each of the main capacitor 2 and the boosting capacitors 17 and 20 via the main capacitor 2 and the transistor 16 or 19, that is, a high voltage which is about three times the charging voltage of the main capacitor 2 is applied. It will be.

In other words, in this embodiment, a high voltage that is a multiple of "1" added to the number of boosting capacitors is applied between the main electrodes of the flash discharge tube 5, and as a result, the above The flash discharge tube 5 has the above-mentioned I.S. G. B. T. The light emitting operation is started easily from the time point of turning on, and the charge stored in the main capacitor 2 is consumed to emit light.

When a light emission stop signal is supplied to the input terminal 25a of the drive control circuit 25 at an appropriate time when the flash discharge tube 5 is emitting light, the drive control circuit 25 causes the I.D. G. B. T.
To turn off.

I. G. B. T. When is turned off, the discharge current flowing through the flash discharge tube 5 is cut off, the flash discharge tube 5 stops its light emission, and returns to the initial state through the ionization state described above.

At the same time, the I.V. G. B. T. And the discharge loop via the discharge circuits 26, 29 and the I.V. of the trigger capacitor 33. G. B.
T. Therefore, the discharge loop via the trigger transformer 34 is interrupted, and thus the boosting capacitor 1
7, 20 and the trigger capacitor 33 are ready to be charged.

As a result, the main capacitor 2, the flash discharge tube 5, the second diode 13, the boosting capacitor 17, the third capacitor
Loop of diode 21, main capacitor 2, flash discharge tube 5, second diodes 13, 14, boosting capacitor 2
0, the loop of the third diode 22, the main capacitor 2,
A current will flow through the loop of the flash discharge tube 5, the second diodes 13 and 14, the trigger capacitor 33, and the trigger transformer 34, and the boost capacitors 17 and 20,
The trigger capacitor 33 will be charged instantly.

That is, even when the flash discharge tube 5 is in the ionized state and the cathode potential thereof is high, the boost capacitors 17, 20 and the trigger capacitor 33 originally have the flash discharge as is clear from FIG. Since the terminal on the side connected to the cathode side of the tube 5 is configured to be charged to a high potential, the charging operation can be performed without any trouble from the time when the flash discharge tube 5 is in the ionized state. In other words, I. G. B. T. Will be started at the same time as off.

As a result, in order to carry out repeated light emission operation at a high frequency of several tens of Hz or more, after a very short time, the supply of the light emission stop signal to the drive control circuit 25 is stopped and the light emission start signal is supplied again, and the I.I. G. B. T. Even if the ON voltage is supplied to the gate of the I.V. G. B. T. Since the battery is instantly charged during the off operation of the above, the I. G. B. T. When is turned on, the flash discharge tube 5 can be excited at all times, and the charging voltage of the boosting capacitors 17 and 20 can be applied between the main electrodes of the flash discharge tube 5, so that light emission omission of the flash discharge tube 5 can be prevented.

FIG. 2 is a main part electric circuit diagram showing another embodiment of the strobe device according to the present invention. In the figure, the components having the same reference numerals as those in FIG. 1 show the components having the same function.

As is apparent from FIG. 2, in this embodiment, the configuration of the operation control system of the transistors 16 and 19 which are the control switch elements of the embodiment shown in FIG. In this example, the operation is not used.

That is, instead of the discharge circuits 26 and 29 described above, an input terminal 35a to which a light emission start signal is supplied, a reference power source terminal 35b to which an appropriate reference power source is applied, and the light emission start signal to the input terminal 35a are input. The gate means 35 comprising first and second transistors 36, 37 and resistors 38, 39, 40 forming a switch circuit for supplying the reference power source to the bases which are the control poles of the transistors 16, 19 in response to the supply of This is an example of connection. It is also apparent that the structure of the gate means 35 functions as a current amplification circuit.

The operation of the embodiment shown in FIG. 2 will be described below. As described above, the only major difference from the previous embodiment is the operation control system of the transistors 16 and 19.
For example, it goes without saying that operations such as boosting the voltage between the main electrodes of the flash discharge tube 5 by the charging voltage of the boosting capacitors 17 and 20 are the same as those in the previous embodiment.

By the operation of the DC high voltage power supply not shown in FIG. 2, the boosting capacitors 17 and 2 are operated as in the previous embodiment.
When the light emission start signal is supplied to the drive control circuit (not shown) and the input terminal 35a of the gate means 35 in a state where the drive control circuit and the input terminal 35a of the gate means 35 are charged to the polarity shown in FIG. G. B. T. Is turned on, the gate means 35 also starts operating, and the first and second transistors 3 are turned on.
6, 37 turns on.

Therefore, although not shown in FIG. 2, the flash discharge tube is excited by the operation of the trigger circuit as is well known in the same manner as in the previous embodiment, and at the same time, the gate means 35 is activated.
An appropriate reference power source supplied to the reference power source terminal 35b of the transistor 1 via the second transistor 37.
Since the transistors 16 and 19 are supplied to the bases of the transistors 6 and 19 and the transistors 16 and 19 are turned on, the charge charges of the boosting capacitors 17 and 20 are not shown in FIG. ． G. B. T. And the like between the main electrodes of the flash discharge tube.

As a result, the voltage between the main electrodes of the flash discharge tube is
Similar to the previous embodiment, when the number of boosting capacitors is “n”, the charging voltage of the main capacitor is increased by (n + 1), that is, a high voltage, that is, a high voltage of about 3 times,
The flash discharge tube starts the light emitting operation very easily, and consumes the electric charge charged in the main capacitor to emit light.

During the light emission of the flash discharge tube, the I.V. G. B. T. When is turned off, the discharge loop of the main capacitor, the trigger capacitor, and the boosting capacitors 17 and 20, which are not shown in FIG. 2, is cut off as in the previous embodiment, so that the flash discharge tube stops its light emission and the After returning to the initial state through the ionized state described above, the boosting capacitors 17 and 20 and the trigger capacitor can be charged.

As a result, as in the previous embodiment, the boosting capacitors 17, 20 via the main capacitor, the flash discharge tube, the second diodes 13, 14, and the third diodes 21, 22.
The charging loop of the main capacitor, the flash discharge tube, the second diodes 13 and 14, the trigger capacitor via the trigger transformer is formed, and the boosting capacitors 17 and 20 are instantly charged. Will be.

Therefore, I.D. G. B. T. Even if the light emission start operation is performed again after an extremely short time from the turning-off time of I. G. B. T. When ON, the flash discharge tube can be excited at all times, and the charging voltage of the boosting capacitors 17 and 20 can be applied to the main electrodes by superimposing it on the charging voltage of the main capacitor. Thus, the repeated light emitting operation can be stably performed without causing light emission omission.

In each of the above-mentioned embodiments, the voltage between the main electrodes of the flash discharge tube is about 3 times the charging voltage of the main capacitor.
It was an example in which the voltage was only boosted to twice the high voltage.
By increasing the number of the second diodes indicated by 3 and 14, and also by increasing the number of series bodies composed of the control switch element and the boosting capacitor connected to both ends of the second diode indicated by the figure numbers 15 and 18, Needless to say, it is possible to apply a high voltage, which is three times or more the charging voltage of the main capacitor, between the main electrodes of the flash discharge tube.

Although not shown, the anode thereof is replaced by a resistor 40 instead of the first transistor 36 and the resistors 38, 39 of the gate means 35 in the embodiment shown in FIG.
And the cathode is I.V. G. B. T. You may employ the diode connected with the collector of. That is, I. G. B. T. Is turned on by the drive control circuit 25 that operates in response to the light emission start signal, and controls the anode potential thereof to a low level. Therefore, even when the above diode is adopted, The above I. G. B. T. When the transistor is turned on, the transistor 37 is turned on without causing any inconvenience, and as a result, it is clear that the same operation as that of the gate means 35 described above can be obtained even in the case of the above configuration.

[0065]

The strobe device according to the present invention comprises a plurality of boosting capacitors capable of charging the flash discharge tube at the same time when the flash discharge tube is in an ionized state. G. B. T.
When the power is turned on, the charging voltage of the boosting capacitor is always applied between the main electrodes of the flash discharge tube by superimposing the charging voltage of the main capacitor, that is, the number of boosting capacitors is n. , A high voltage that is (n + 1) times the charging voltage of the main capacitor is always applied.
It is possible to realize a high-speed repetitive light emission operation at a frequency of Hz or higher without causing light emission omission. G. B. T. It has an effect that the flash discharge tube can surely emit light by following the high cycle on / off operation of.

Further, since a high voltage can be stably applied between the main electrodes of the flash discharge tube, reliable and stable light emission can be achieved even if the light emission starting voltage of the flash discharge tube is high. It has an effect that a flash discharge tube having an impedance can be adopted, and as a result, it has an effect that a device shape can be reduced and an amount of emitted light can be increased.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of a strobe device according to the present invention.

FIG. 2 is an electric circuit diagram of a main part showing another embodiment of the strobe device according to the present invention.

FIG. 3 is an electric circuit diagram showing an example of the device disclosed in Japanese Patent Laid-Open No. 64-17033.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DC high-voltage power supply 2 Main capacitor 5 Flash discharge tube 10 First series connection body 11 First diode 12 Second series connection body 13 Second diode 14 Second diode 15 Series body 16 Transistor 17 Boosting capacitor 18 Series body 19 Transistor 20 Step-up capacitor 21 Third diode 22 Third diode 23 Charging means 24 Charging resistance 25 Drive control circuit 26 Discharge circuit 27 Resistance 28 Resistance 29 Discharge circuit 30 Resistance 31 Resistance 32 Trigger circuit 33 Trigger capacitor 34 Trigger transformer 35 Gate means 36 1st Transistor 37 Second transistor 38 Resistor 39 Resistor 40 Resistor

Claims (4)

[Claims] 1. A DC high voltage power supply, a main capacitor connected to both ends of this DC high voltage power supply, a flash discharge tube, a first diode and an insulated gate bipolar transistor are connected in series, and both ends of the main capacitor are connected. First connected to
A series connection body and a plurality of second diodes connected in series, a second series connection body connected to both ends of the first diode, a control switch element having a control pole, and a boost capacitor are connected in series. A plurality of series bodies connected to both ends of each of the plurality of second diodes, an anode connected to a connection point between the control switch element and a boosting capacitor, and a cathode connected to the main capacitor. A plurality of third diodes connected to the low potential side terminals and the plurality of boosting capacitors so that the terminals on the side connected to the cathode of the flash discharge tube via the second diodes have a high potential. Charging means for charging each of them through the second and third diodes, a switch control means that operates in response to the supply of a light emission start signal and operates the control switch element, In response to the supply of the start signal, an on-voltage is supplied to the control electrode of the insulated gate bipolar transistor, and in response to the supply of the light emission stop signal, at least the supply of the on-voltage is stopped so that the insulated gate bipolar transistor A strobe device comprising: drive control means for controlling an on / off state; and a trigger circuit for operating to excite the flash discharge tube. 2. The switch control means forms a discharge loop through each insulated gate bipolar transistor of the plurality of boosting capacitors, and the plurality of boosting capacitors of the plurality of boosting capacitors are connected through the discharge loop. During discharge operation
2. The strobe device according to claim 1, further comprising a plurality of discharge circuits for supplying a drop voltage generated in the discharge loop to each control pole of the plurality of control switch elements as an ON signal. 3. The switch control means includes a reference power supply terminal to which an appropriate reference power supply is applied, an input terminal to which a light emission start signal is supplied, and the reference power supply in response to the supply of the light emission start signal to the input terminal. 2. The strobe device according to claim 1, further comprising gate means including a switch circuit for supplying the control electrodes to the respective control electrodes of the plurality of control switch elements. 4. The switch control means is connected to a reference power supply terminal to which an appropriate reference power supply is applied, the collector of an insulated gate bipolar transistor, and a fourth diode,
An input terminal to which an electric displacement due to an ON operation of the insulated gate bipolar transistor in response to the supply of a light emission start signal is supplied, and a plurality of control switch elements for controlling the reference power source in response to the electric displacement of the input terminal. 2. The strobe device according to claim 1, further comprising gate means including a switch circuit for supplying the control electrodes to the respective control poles.