KR200402578Y1 - lighting circuit for flash lamp - Google Patents

Abstract

The present invention charges a high-potential charge to an energy charging capacitor and discharges the charged charge to a flash lamp, thereby irradiating a strong flash of light on the bar light source to excite photons of the bar light source medium. The present invention relates to a laser generator for generating light, and in particular, a high-frequency switching that receives a driving power source in which a commercial alternating current is rectified, converts it into a high-frequency AC power, and outputs it by varying the frequency of the AC power output according to an input control signal. A converter; A multi-transformer for receiving an AC power output from the high frequency switching converter and inducing it to a secondary coil provided with a plurality of primary coils; A standby state for generating a flash by a trigger operation for inducing initial lighting to the flash lamp by an on-operation control signal by receiving power induced in the secondary coil of the multi-transformer and the discharge voltage of the energy charging capacitor. First and second triggers and a shimmer driver to perform a shimmer operation to maintain a; First and second SELVs receiving power induced in the secondary coil of the multi-transformer and supplying a driving voltage of a laser generator other than the flash lamp driving with a constant voltage having a specific voltage level; Receiving an error in the output state by receiving a constant voltage of any one of the constant voltages output from the first and second SELV and preset reference voltage, and controlling the operation of the high frequency switching converter based on this to remove the error Constant voltage state maintenance control unit; And a triggering operation stopping unit for detecting a signal according to the operation state of the first and second triggers and the shimmer driver of the first and second triggers, and maintaining the first and second operation of the first and second triggers and the shim driver and stopping the triggering operation. To more stably maintain the operation of the high voltage supply unit supplying the power supply voltage for the lighting of the flash lamp, and integrate the supply unit of the low voltage source for driving the system for the control operation of the laser generation system with the high voltage supply unit. This is to reduce the volume of the system.

Description

Lighting circuit for flash lamps

The present invention relates to a lighting circuit for a flash lamp in a laser generating system, and in particular, to maintain a stable operation of the high voltage supply unit for supplying a power voltage for the lighting of the flash lamp, and at the same time to control the operation of the laser generating system. The present invention relates to a lighting circuit for a flash lamp for integrating a supply of a low voltage source for driving a system to a high voltage supply and thereby reducing the volume of the entire system.

In general, a laser is a general term for light generated by using the induced radiation property of an atomic material in an excited state, and the configuration showing the basic principle of generation for laser generation is as shown in FIG. The principle is as follows.

Creates an inverted distribution (a state in which the number of atoms in the higher energy level is greater than the lower level, also called the negative temperature state) between two suitable energy levels of an atomic group (or matter). The energy difference between the two levels is caused by the light whose frequency is resonant, and the induced radiation that transmits energy to the light occurs by transitioning the higher level atoms to the lower level. As a result, the incident light has the same frequency phase and increases in intensity.

This is called amplification of coherent phosphorescence. When a negative temperature medium is placed in a resonator of light and the amplified light is repeatedly reciprocated, self-oscillation of light occurs and becomes a laser. Therefore, since the laser light is a wave in phase, the nature is different from ordinary light. The resonator of light is basically placed two parallel mirrors with high reflectance in parallel with each other, and the standing wave perpendicular to the plane is the resonance mode.

Since a resonance mode of a large number of light exists in the amplifiable frequency range as a laser medium, it is common for the laser to oscillate simultaneously in several modes. Oscillation in one mode by a special method is called a single frequency laser. In addition to a continuous wave laser that continuously emits light, there are also pulsed lasers that only emit light for a certain period of time.

At this time, as a widely used method for generating a laser beam, there is a method of oscillating the laser light by exciting a photon by irradiating a strong flash to the rod-shaped light source medium, in this case, Xenon or Crypton lamp used as a flash lamp In order to generate a flash by lighting, a method of charging a high-capacity electric charge to an energy charging capacitor and then discharging the charged electric charge to a flash lamp is used.

In addition, in order to perform the initial lighting of the above-described flash lamps in the non-lighting state, a high voltage of about 10,000 to 20,000 volts is applied between the anode and the cathode of the flash lamp so that the discharge gas in the tube is excited in the plasma state. In this case, the ionized gas rapidly forms a discharge path for a high voltage, and enters a lighting state. This initial lighting state is called a trigger, which is triggered when the flashing lamp flashes repeatedly in a fast cycle. Is applied to every flash pulse, which is not desirable for the life of the lamp. Therefore, it is common to apply the high-voltage trigger pulse voltage only at the initial firing time by flowing the minimum DC current necessary to keep the firing lamp on continuously. Is being used.

The minimum holding current applied for this purpose is called a simmer current.

Therefore, when a voltage having a large energy is applied from the energy charging capacitor between the anode and the cathode of the flash lamp which is triggered and placed in the shimer state, the energy is discharged to generate a strong flash.

In the above description, a voltage used for the shimmer requires a DC voltage of about several hundred volts, and a charge voltage of several hundred to 2,000 volts is used for the voltage charged to the capacitor for the main energy discharge.

As a device for performing the trigger and the shimmer function as described above, conventionally, assembling parts of several individual devices as shown in FIG. 2 have a disadvantage in that the size of the device is increased and the manufacturing cost is increased.

Looking at the prior art with reference to the accompanying Figure 2, it comprises a trigger and a shimmer circuit portion referred to by reference numerals 1 and 2 performing the same configuration and the same function, because the optical structure of the process of generating a laser light This is because it requires two stages of the oscillator (OSC) and the amplifier (AMP).

In addition, two SELVs (Safety Extra Low Voltage) 20A, 20B, which perform the same function and the same function, are provided, which is used to drive various control system circuits and cooling motor fans. This is because a DC voltage of a low voltage (for example, + 5V, + 12V, -12V, etc.) is required.

Referring to the operation of the first trigger and the shimmer circuit portion referred to by reference number 1, the commercial AC voltage input through the key switch SW1 is rectified and smoothed at the reference number A to convert the converter of the reference number B (DC-AC converter). The high frequency AC voltage generated by the high frequency (for example, about 50 kV) switching operation is transmitted to the secondary side by the transformer (T1).

On the secondary side, the sub-high voltage rectified by the diode D1 and the capacitor C1 and the voltage for the shimmer rectified by the diode D2 and the capacitor C2 are output.

The negative high voltage outputs an initial voltage value of about 3 kV to 4 kV, which charges a high voltage to the high voltage capacitor C5 through a series line such as first to third resistors R1 to R3.

Meanwhile, the voltage for the shimmer (about 100 V to 300 V) generated at both ends of the capacitor C2 is charged to the capacitor C4 through the resistor R4 and at the same time divided into the resistors R5 and R6 to divide the capacitor C3. When the voltage reaches the trigger voltage value of the diac Diac1, SCR1 is turned on so that the voltage charged in the capacitor C4 is applied to the primary side of the high voltage boosting transformer T2.

As a result, a high voltage pulse of about 5 kV to 15 kV is generated on the secondary side of the high voltage transformer T2. The high voltage pulse is pressurized together with the negative high voltage charged at both ends of the capacitor C5. OSC) is supplied to the anode side to trigger the lamp.

The lamp triggered in this way is maintained in the ready state by the shimmer voltage crossed through the diode D3.

Therefore, as soon as the lamp maintains the state of the lamp, the signal "SIMMER-OK" is output when the current of the lamp flows to the relay RLY1. The signal is sent to the microcomputer circuit that controls the entire equipment. Used to manage the sequence of operations.

The operation principle of the second trigger and the shimmer circuit portion, referred to by reference numeral 2 having the same circuit configuration and structure, is also the same as the operation of the first trigger and shimmer circuit portion 10A described above, and keeps the lamp in the shimmer state.

When the second switch SW2 and the third switch SW3 are turned on for each lamp that maintains the shimer state, the charges charged in the sixth capacitor C6 and the seventh capacitor C7 are discharged through each lamp. Thereby generating a flash.

In addition, SELV, which is referred to by reference numerals 20A and 20B, is shown in one drawing in FIG. 2 but is a general high frequency switch mode power supply (SMPS) device composed of completely separate units. It is to output stable DC low voltage isolated from power line (output voltage value is changed as needed).

Therefore, the following problem has arisen in the above-mentioned prior art.

The first problem is the use of four separate modules. This increases the complexity of the structure.

The second problem is that the negative voltage generated in the capacitor C1 continues to be output while maintaining the state of the shimmer. Therefore, the resistors R1 to R3 that act as the conductors of the negative voltage in order to generate the trigger voltage are the Since it acts as a load after entering the state, a loss of power occurs. In order to suppress this, the size of the device is increased by using the resistors with a large allowable loss power.

The third problem is to increase the number of secondary windings of the transformer (T1) in order to obtain a nominal voltage, which causes frequent failures due to insulation breakdown between the winding layers.

The fourth problem is that since the SCR is fired by DIAC's continuous self-oscillation even after switching to the shimer state, continuous trigger pulses are generated on the secondary side of the boost transformer (T2) for high voltage pulse generation. There is a problem that the dielectric strength is weakened.

Finally, when a short circuit of the commercial AC power supply voltage occurs, the system is reset. This phenomenon causes a problem that a safety accident occurs when applied to medical equipment.

An object of the present invention for solving the above problems relates to a lighting circuit for a flash lamp in a laser generation system, and in particular, to more stably maintain the operation of the high voltage supply unit for supplying a power voltage for the lighting of the flash lamp. At the same time, as a single off-line converter (device for generating a DC or pulse voltage of the secondary side insulated from the commercial AC line), the functions of the above-described plurality of device units (10A, 10B, 20A, 20B, etc.) and Minimize the size of the whole device by simultaneously carrying out the purpose, avoiding the unnecessary power loss mentioned above after entering the shimer state and preventing the high voltage trigger voltage from occurring, and the above-mentioned commercial AC power supply Trigger failure does not succeed within a certain amount of time when the initial trigger fails due to the rapidity of the lamp or aging of the lamp. It is to provide a lighting circuit for a flash lamp for stopping the operation of the device if.

Features of the flash lamp lighting charging circuit according to the present invention for achieving the above object, the charge of the high-charge potential in the energy charging capacitor and then discharge the charged charge to the flash lamp to the rod-type light source medium A laser generating device for generating a laser beam by irradiating a strong flash of light with a flash lamp to excite a photon of the rod-type light source medium. A high frequency switching converter for varying and outputting the frequency of the AC power output according to the control signal; A multi-transformer for receiving an AC power output from the high frequency switching converter and inducing it to a secondary coil provided with a plurality of primary coils; A standby state for generating a flash by a trigger operation for inducing initial lighting to the flash lamp by an on-operation control signal by receiving power induced in the secondary coil of the multi-transformer and the discharge voltage of the energy charging capacitor. First and second triggers and a shimmer driver to perform a shimmer operation to maintain a; First and second SELVs receiving power induced in the secondary coil of the multi-transformer and supplying a driving voltage of a laser generator other than the flash lamp driving with a constant voltage having a specific voltage level; Receiving an error in the output state by receiving a constant voltage of any one of the constant voltages output from the first and second SELV and preset reference voltage, and controlling the operation of the high frequency switching converter based on this to remove the error Constant voltage state maintenance control unit; And a trigger operation forced stop unit configured to sense a signal according to the operation state of the first and second triggers and the shimmer driver of the first and second triggers, and to maintain the operation of the first and second triggers of the first and second driver and to stop the trigger operation. There is.

An additional feature of the flash lamp lighting charging circuit according to the present invention for achieving the above object is, the trigger operation forced stop unit detects the signal according to the operation state of the first and second triggers and the shimer driving unit And a lighting controller for controlling a flash lamp to control an operation of the first and second triggers and the shimmer driver by a logical operation of a signal and a detection signal of a supply state of a commercial AC power supply and a user request signal.

Additional features of the flash lamp lighting charging circuit according to the present invention for achieving the above object, the first, the second trigger and the shimmer drive unit through the secondary coil of the multi transformer according to the control signal, respectively An LC resonator configured to generate a series resonant frequency Q times higher by receiving power during on-operation of a relay to control the induced power; A high frequency rectifying unit rectifying the high frequency power output from the LC resonance unit; A shimmer current detector configured to receive a rectifier power output from the high frequency rectifier and detect a shimmer current; And a trigger pulse generator for generating and outputting a trigger pulse by receiving the rectified power output from the high frequency rectifier.

An additional feature of the flash lamp lighting charging circuit according to the present invention for achieving the above object is, the trigger operation forcing stop unit to receive the signal output from the shimer current detection unit to perform an AND operation output A first and gate; And a trigger pulse generation stop signal unit that prevents the trigger pulse generation unit from generating a trigger pulse when a predetermined logic value is output by receiving the output signal of the first and gate.

An additional feature of the flash lamp lighting charging circuit according to the present invention for achieving the above object is, the constant voltage state maintaining control unit receives the voltage output from any one of the SELV of the first or second SELV An output voltage error detector for detecting a degree of error compared with a preset reference voltage; And an excitation frequency control unit for changing the magnitude of the voltage applied to the primary coil of the multi-transformer by changing the frequency of the high frequency switching converter according to the error degree output from the output voltage error detection unit.

Further another feature of the flash lamp lighting charging circuit according to the present invention for achieving the above object, the flash lamp lighting control unit of the system in the ON operation state of the power switch for inputting a commercial AC power to the system A system operation mode switch for adjusting the operation state to three modes; A power on / off detection unit for detecting whether the system power is input by detecting a power output according to the operation of the power switch and the system operation mode switch; An inverter configured to receive a signal sensed by the first and second triggers and a shimer driver in accordance with the shimer operating state from the trigger operation stop unit, and invert the logic state to output the signal; A third and gate receiving an output signal of the power on / off detection unit and a mode selection signal of the system operation mode switch and performing an AND operation to output a result of the operation; A relay driver for turning on the relay when a predetermined logic value is output by receiving the output signal of the third and gate; A timer circuit for receiving an output signal of the relay driver and counting the predetermined time for a predetermined time and notifying the predetermined time when elapsed; A second and gate receiving a notification signal of the timer circuit and an output signal of the inverter and performing an AND operation to output a result of the calculation; And a relay driving off signal generator for forcibly stopping the operation of the relay driver when a predetermined logic value is output by receiving the output signal of the second and gate.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

3 is a block diagram illustrating a principle of a lighting circuit for a flash lamp according to the present invention, the power switch (SW4) for inputting a commercial AC power supply to the system, the ON operation of the power switch (SW4) The system operation mode switch (s) for adjusting the operation state of the system to three modes in the state, and the input of the system power by sensing the power output according to the operation of the power switch (SW4) and the system operation mode switch (s) The power supply ON / OFF detecting unit q for detecting whether the power switch SW4 maintains the system operation state by the system operation mode switch s in the on operation state, and the commercial AC power is rectified and smoothed. The rectifying and smoothing unit (a) outputting to the DC power supply and the DC power output from the rectifying and smoothing unit (a) at a corresponding high frequency according to the frequency control signal to switch 1 of the multitransformer T7. The high frequency switching converter b applied to the side coil W1 and the third relay RLY3 for controlling the power induced through the secondary side first coil W2 of the multi-transformer T7 according to a control signal. A first LC resonator c that receives an input during on operation and generates a series resonance frequency that is Q times higher, a first high frequency rectifier e that rectifies the high frequency power output from the first LC resonator c, The first pulse current rectifying unit (g) receives the rectified power output from the first high frequency rectifying unit (e) and receives the rectifier power, and the rectifier power output from the first high frequency rectifying unit (e) receives a trigger pulse. The first trigger pulse generating unit (h) for generating and outputting the control signal and the fourth relay (RLY4) for controlling the power induced through the second coil (W3) of the secondary side of the multi-transformer (T7) according to the control signal Generates a series resonance frequency higher than Q times when it is turned on Inputs a second LC resonator d, a second high frequency rectifier f for rectifying the high frequency power output from the second LC resonator d, and a rectified power output from the second high frequency rectifier f; A second trigger current detecting unit (i) receiving the sensing current and a second trigger pulse generating unit (j) receiving the rectified power output from the second high frequency rectifying unit (f) to generate and output a trigger pulse; In response to the signals output from the first and second shimmer current detectors g and i, the output signals of the first and gate AND1 for performing the logical AND operation of the signals are output. Trigger pulse generation stop signal generator that prevents the first trigger pulse generator h and the second trigger pulse generator j from generating a trigger pulse when a logic value (for example, logic “1”) is output. (k) and induction through the secondary side third coil W4 of the multitransformer T7. A third high frequency rectifying unit (W) for rectifying the supplied power, a first SELECT (20A) for generating and outputting a stable DC low voltage using the power rectified by the third high frequency rectifying unit (w), and the multitransformer (T7) A fourth high frequency rectifying unit (x) for rectifying the power induced through the secondary side fourth coil (W5) and a power source generated by the rectified in the fourth high frequency rectifying unit (x) to generate and output a stable direct current low voltage An output voltage error detection unit (o) that receives a 2SELV (20B), a voltage output from the second SELV (20B), and compares it with a preset reference voltage to detect a degree of error thereof; and the output voltage error detection unit (o) An excitation frequency control unit (n) for changing the frequency of the voltage applied to the primary coil (W1) of the multi-transformer (T7) by changing the frequency of the high frequency switching converter (b) according to the error degree output from 1Andge An inverter INT that receives the output signal of the output AND1, inverts its logic state, and outputs the output signal of the power on / off detection unit q and the mode selection signal of the system operation mode switch s. The third and gate AND3 outputting the logical AND operation and outputting the result of the operation, and the output signal of the third and gate AND3 are received, and a predetermined logical value (for example, logic "1"). ) Is outputted, the relay driver p for turning on the third relay RLY3 and the fourth relay RLY4 and the output signal of the relay driver p are counted for a predetermined time. A second end that receives a timer circuit l for notifying a predetermined time as a result, an operation signal of the notification signal of the timer circuit 1 and an output signal of the inverter INT, and outputs the result of the operation. An output scene of the gate AND2 and the second and gate AND2 When a predetermined logic value (for example, logic " 1 ") is received by receiving a call, the relay drive off signal generator m is configured to forcibly stop the operation of the relay driver p.

Detailed configuration of the lighting circuit for the flash lamp in the laser generating system according to the present invention configured as described above is shown in Figures 4 and 5 attached.

4 and 5 described above are one embodiment when the present invention is actually applied, and the circuit configuration of the present invention is not limited to the configuration shown in FIGS. 4 and 5 to which the present invention is attached.

In addition, Figure 6 Figure 6 is an exemplary view of the waveform of the main part according to the present invention.

Referring to the configuration shown in FIGS. 4 and 5 and the waveforms of FIG. 6 with reference to FIG. 3, the operation of the lighting circuit for the flash lamp in the laser generation system according to the present invention is as follows.

Commercial AC power input is controlled on-off by the main power switch (SW4) and when switched to the on-state DC voltage generated in the rectification and smoothing circuit (a) is input to the high frequency switching converter (b).

The high frequency switching converter (b) has a basic configuration of a half-bridge of the frequency modulation series resonant system performing a high frequency switching operation in the range of about 40 kHz to 80 MHz.

By the switching operation of the high frequency switching converter (b), a high frequency AC voltage having a waveform as shown in the attached waveform (a) of FIG. 6 is input to the primary winding W1 of the multi-transformer T7 and Therefore, the secondary windings W2, W3, W4 and W5 of the multi-transformer T7 are transmitted, and the voltage induced in the secondary windings of the multi-transformer T7 referred to by the reference numbers W4 and W5 is always different from the system. Since power for driving the configuration must be supplied, high frequency rectification is performed through the third and fourth high frequency rectifying units, which are referred to by reference numerals w and x, so that power is supplied to the first and second SELV 20A and 20 SELs, respectively. A stable direct current low voltage is supplied to all configurations of the system.

On the other hand, the voltage induced in the secondary winding of the multi-transformer T7 referred to by reference numbers W2 and W3 for supplying the lamp current and the trigger pulse of the flash lamp is interrupted by the relays RLY3 and RLT4. Power is supplied to the flash lamp side by turning on only at the moment.

The LC resonator parts c and d positioned at the rear ends of the relays RLY3 and RLT4 have a resonance point at a high frequency switching frequency or an integer multiple thereof, and the resonance voltage is increased by Q times in series resonance, so that the high frequency switching is performed. The high frequency AC voltage generated by the switching operation of the converter b serves to change the voltage of the secondary windings W2 and W3 of the multi-transformer T7 to a higher high frequency power source.

At this time, when the output voltage is higher than the reference value by inputting to the output voltage error detector o from one of the output voltages of the SELV, the excitation frequency is controlled by the excitation frequency controller n, and vice versa. By controlling the high frequency AC voltage supplied to the primary coil W1 of the high frequency switching converter b, the secondary output voltage is kept constant as a result.

When the main power switch SW4 is turned on, the voltages of the SELVs 20A and 20B are always supplied with a constant output voltage, thereby maintaining a standby state for a microcomputer (not shown) for system control.

In addition, the output voltage induced in the secondary winding of the transformer T7 referred to by the reference numbers W2 and W3 varies depending on the characteristics of the lamp type, but is set as a voltage value of about 300 to 600 V. The relays (RLY3 and RLY4) They are blocked until each conducts.

In order to enter the trigger and the shimmer state, turn on the system operation mode switch s up to two stages, and the power on detection signal and the 12V signal inputted through the switch SW5 and the switch SW6 are connected to the photo coupler PC13. The gate operation is performed, and the output signal thereof turns on when the SCR of the relay driver P is turned on.

The three-stage switch (s) used here is a switch capable of three mode switching to 0 terminal, 1 terminal and 2 terminal, the step of switching to 0 terminal is the off state of the whole system, the step of switching to 1 terminal In the switch SW5, the commercial AC power supply is in a conductive state, and in the switch SW6, the OFF state is turned on.

Lastly, the step of switching to two terminals is not a fixed state but is connected to one terminal, and when it is released, it is connected to one terminal instantaneously and is switched to one terminal. In the state where the commercial AC power supply is turned on, the 12V voltage at the switch SW6 is turned on at a corresponding moment.

According to the above-described process, the output signal of the third AND gate AND3 maintains the state of logic 1 at a short moment when the system operation mode switch s proceeds to step 2 and returns to step 1, thereby relaying As the driving unit p receives a 12V voltage, the SCR constituting the relay driving unit is turned on to maintain the state continuously.

As the relay driver p is turned on, the third relay RLY3 and the fourth relay RLY4 are turned on, and the first and second LC resonators c are turned on by the turn-on operation of the relays RLY3 and RLY4. , d) is driven.

In this case, the first and second LC resonators c and d have a resonance point at a high frequency switching frequency or an integer multiple thereof, and the resonance voltage of the first and second LC resonators c and d increases by Q times in series resonance. The high frequency AC voltage generated by the switching operation is configured to change the voltage of the secondary windings W2 and W3 of the multi-transformer T7 to a higher high frequency power supply.

At this time, the relationship between the negative voltage and the shimmer voltage according to the system operation mode switch s ON operation is shown in FIG. The voltage rises to 1200V and maintains a voltage of about 300V at the trigger time.

In this way, the trigger operation is actually performed in the initial driving state, so that the output voltages of the shimmer current detectors g and i and the signals of the trigger pulse generators h and j output a voltage for maintaining the shimmer state. Each of the cathode terminals of the reverse current preventing diodes D5 and D6 is combined and applied to the flash lamps Lamp1 and Lamp2.

At this time, the waveform of the voltage applied to the anode terminals of the reference numerals SCR11 and SCR12 of the trigger pulse generators h and j is subjected to the voltage of the waveform as shown in FIG. The characteristics of the voltage are the same as the zener voltage of the zener diodes referred to by reference numerals D25 and D26.

Also, according to the voltage applied to the anode terminals of the SCR11 and SCR12, the DIAC input voltage curves of C20 and C21 are as shown in FIG.

At this time, the photo couplers PC11 and PC12 act as the first and gate AND1 at the moment when the triggering operation is performed, and the output voltage thereof is applied to the trigger pulse generation stop signal part k, and the trigger pulse generation stop signal part By the output signal of (k), the operation of the trigger pulse generators h and j is forcibly terminated.

Even when the operation of the trigger pulse generators h and j is forcibly terminated by the operation of the trigger pulse generation stop signal k described above, the flash lamp is sufficiently turned on through a predetermined delay time according to the signal flow. This state is completed, and then the state of the shimmer operation is maintained by the output voltages of the shimmer current detectors g and i.

In addition, when the power supply voltage is unexpectedly turned off in the process of maintaining the above-mentioned shimer operation state, even if the power supply voltage is input again, the device does not enter the operating state and remains in the OFF state. This is because the SCR13, which is turned off at the same time as the power is turned off, is not fired unless the switch S is artificially switched to step 2.

In addition, as an operation principle of the timer (l) circuit provided to prepare for triggering and disabling of the lamp due to aging of the lamp, the mode switching switch S is switched to step 2 and 5 to 15 seconds after the relay drive signal is generated. In order to generate a time sensing signal in the (set value) range, a voltage set by the resistor R40 and the resistor R37 is charged to the capacitor C32 through the resistor R36, and the charging voltage is within the above-described time. When it gradually rises and reaches a value higher than the gate voltage of the IC 1 through the resistor R39, the IC 1 is turned on to generate a timer output.

In addition, since the capacitor C32, which is charged once, is discharged immediately through the resistor R38 when the power is turned off, the same operation is repeated even when the next ON operation is repeated.

The output of the timer 1 described above turns off the relay driver P by conducting the transistor Q5 through the resistor R41 and conducting the transistor Q7 again through the resistor R42.

Therefore, if the set time elapses after the switch S is turned on (step 2), the relay drive signal output is turned off. However, if the shim OK signal output is input within the set time, the relay drive signal output is not turned off.

In other words, when the shimmer OK signal is generated, current flows through the resistor R43 to the base of the transistor Q8 serving as the NOT gate INT. This causes the base potential of the transistor Q7 to be zero, thereby relaying the OFF signal. It does not occur.

While the invention has been shown and described in connection with specific embodiments, it is understood that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

Providing the flash lamp lighting circuit according to the present invention as described above to maintain a more stable operation of the high voltage supply unit for supplying a power voltage for the lighting of the flash lamp and at the same time for the control operation of the laser generation system The supply of the low voltage source for driving can be integrated with the high voltage supply, thereby reducing the volume of the entire system.

1 is an exemplary view for explaining a general laser generation principle

2 is a diagram illustrating a configuration of a lighting circuit for a flash lamp according to the related art.

3 is an exemplary block diagram of a lighting circuit for a flash lamp according to the present invention.

4 and 5 is an exemplary circuit configuration of the lighting circuit for a flash lamp according to the present invention shown in FIG.

Figure 6 is an exemplary view of the waveform of the main part according to the present invention

Claims (6)

By charging a high-capacity charge to an energy charging capacitor and discharging the charged charge to a flash lamp, the flash lamp irradiates a strong flash light to excite a photon of the bar light source medium to generate a laser light. In a laser generating device that: A high frequency switching converter (b) for receiving a driving power source in which a commercial AC power is rectified, changing the frequency to an high frequency AC power, and outputting the variable AC frequency according to the input control signal; A multi-transformer (T7) for receiving the AC power output from the high frequency switching converter (b) to the secondary coils (W2 to W5) provided with a plurality of primary coils (W1); A trigger operation for receiving initial power induced in the secondary coils W2 and W3 of the multi-transformer T7 and inducing initial lighting to the flash lamp by an on-operation control signal and discharging the energy charging capacitor. First and second triggers and a shimmer driver for performing a simmer operation to maintain a standby state to generate a flash by a voltage; First and second SELVs, which receive power supplied to the secondary coils W4 and W5 of the multi-transformer T7 and supply a driving voltage of a laser generator other than the flash lamp driving with a constant voltage having a specific voltage level. 20A, 20B; Receives a constant voltage of any one of the constant voltages output from the first and second SELVs 20A and 20B, compares it with a preset reference voltage, and recognizes an error in an output state, based on which the high frequency switching converter (b) A constant voltage state maintaining controller for controlling an operation to remove an error; And And a trigger operation forced stop unit for detecting a signal according to the operation state of the first and second triggers and the shim driver of the first and second triggers and the shim driver, to maintain the first and second operation of the first and second triggers and the shim driver. The lighting circuit for flash lamps characterized by the above-mentioned. The method of claim 1, The first and second trigger signals may be detected by the trigger operation stop unit, and the first and second trigger signals may be detected by the logic operation of the user's request signal and a detection signal of a supply state of a commercial AC power supply. And a lighting control unit for a flash lamp for controlling the operation of the second trigger and the shimmer driver. The method of claim 1, The first, second trigger and the shimmer driver respectively turn on the power of the relays RLY3 and RLY4 for controlling the power induced through the secondary coils W2 and W3 of the multitransformer T7 according to a control signal. LC resonating unit (c, d) receiving the input and generating a series resonance frequency higher than Q times; High frequency rectifiers (e, f) for rectifying the high frequency power output from the LC resonators (c, d); A shimmer current detector (g, j) for receiving a rectifier power output from the high frequency rectifiers (e, f) and detecting a shimmer current; And a trigger pulse generator (h, j) for generating and outputting a trigger pulse by receiving the rectified power output from the high frequency rectifier (e, f). The method according to claim 1 or 3, The trigger operation forced stop unit includes: a first AND gate AND1 for receiving a signal output from the shimmer current detection unit (g, i) and performing an AND operation; The trigger pulse generation stop signal unit k prevents the trigger pulse generation unit h and j from generating a trigger pulse when an output signal of the first and gate AND1 is output and a predetermined logic value is output. Lighting circuit for a flash lamp comprising: a. The method of claim 1, The constant voltage state maintenance control unit receives an output voltage from any one of the first SELV 20A or the second SELV 20B, and compares it with a preset reference voltage to detect an error level thereof. )Wow; Excitation frequency for changing the frequency of the voltage applied to the primary coil (W1) of the multi-transformer (T7) by changing the frequency of the high frequency switching converter (b) in accordance with the error degree output from the output voltage error detection unit (o) And a control unit (n). A lighting circuit for a flash lamp. The method according to any one of claims 1 to 3, The flash control unit for the flash lamp includes a system operation mode switch (s) for adjusting the operation state of the system to three modes in the on-operation state of the power switch (SW4) for inputting a commercial AC power to the system; A power on / off detection unit (q) for detecting whether the system power is input by detecting a power output according to the operation of the power switch SW4 and the system operation mode switch s; An inverter (INT) for receiving a signal sensed by the first and second triggers and a shimmer driving unit according to the shimmer operating state from the triggering operation stopping unit, and inverting and outputting a logic state thereof; A third AND gate (AND3) receiving the output signal of the power on / off detection unit (q) and the mode selection signal of the system operation mode switch (s) and performing an AND operation to output the operation result; A relay driver p for turning on the relays RLY3 and RLY4 when an output signal of the third and gate AND3 is received and a predetermined logic value is output; A timer circuit (1) which receives the output signal of the relay driver (p) and counts it for a predetermined time period and notifies it when a predetermined time results; A second AND gate (AND2) receiving the notification signal of the timer circuit (1) and the output signal of the inverter (INT) and performing an AND operation to output the operation result; And And a relay driving off signal generator m for forcibly stopping the operation of the relay driver p when the predetermined logic value is output by receiving the output signal of the second AND gate AND2. The lighting circuit for flash lamps characterized by the above-mentioned.