TW494267B - Flashlight generating circuit - Google Patents

Abstract

In a flashlight generating circuit, a primary side winding 16-3a of a trigger coil 16-3 and a arc tube 16-1 are arranged in a discharge loop L1 where an electric force discharged from a main capacitor 13 flows, a voltage of an internal battery 1 is stepped up to a predetermined voltage by a step-up circuit 11, an electric power is stored in the main capacitor 13 and a trigger-use capacitor 16-2, a trigger switch 15 is closed so that an electric current is allowed to flow in the primary side winding 16-3a so that a light is emitted from the arc tube 16-1 by a trigger voltage from a secondary side winding 16-3b.

Description

494267 A7

5. Description of the invention () [Technical field to which the invention belongs] The present invention relates to a flash generating circuit for emitting a flash. [Known technique] In the conventional technique, when the brightness of the subject is insufficient, a flash is emitted in synchronization with the shutter action to take a picture of the photograph. Such a camera is generally known. A flash generating circuit for emitting a flash is provided in this camera. Fig. 14 is a circuit diagram of a conventional flash generating circuit. The flash generating circuit 200 shown in FIG. 14 includes a booster circuit 2 1 1 connected to a built-in battery 1 for controlling the entire camera. This booster circuit 2 1 1 boosts the voltage from the built-in battery 1 to a predetermined voltage. In addition, the flash generating circuit 200 is provided with a main capacitor 213 via a diode 212 for storing the power boosted by the boost circuit 211. The (one) side of the main capacitor 2 1 3 is connected to the anode side of the diode 2 1 2, and the cathode side of the diode 2 1 2 is connected to the (one) output side of the booster circuit 2 1 1. In addition, the (ten) side of the main capacitor 213 is connected to the (ten) output side of the booster circuit 212. In addition, on the (one) side and the (ten) side of the main capacitor 213, a resistance element 2 1 4 and a trigger switch 2 1 5 are connected in series, and a light emitting tube 216 is arranged in parallel with the main capacitor 2 1 3. The light-emitting tube 216 includes an anode 216a, a cathode 216b, and a side electrode 216c, and xenon (Xe) gas is sealed therein. In addition, the flash generating circuit 200 is provided with a trigger coil 218 having a primary coil 2 1 8 a having a predetermined number of turns, and a secondary coil 1 2 1 8 b having a larger number of turns. One side of the primary coil 2 1 8a is used for triggering. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). Please read the notes on the back page first),, line · Printed clothing for employees 'cooperatives in the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 Printed clothing for employees' cooperatives in the Intellectual Property Bureau of the Ministry of Economic Affairs A7 ______B7 _V. Description of the invention (>) Capacitor 2 1 7 is connected to the connection point of the resistance element 2 1 4 and the trigger switch 2 1 5. On the other hand, one end of the secondary-side coil 2 1 8b is connected to a side electrode 2 1 6 c of the light-emitting tube 2 1 6. The other ends of each of the primary-side coil 2 1 8 a and the secondary-side coil 2 1 8 b are commonly connected to the anode 2 1 6 a of the light-emitting tube 2 1 6. In the flash generating circuit 200 configured in this manner, first, when the trigger switch 2 1 5 is open, the power from the built-in battery 1 is boosted by the booster circuit 2 1 1. The boosted power is stored in the main capacitor 2 1 3 via the diode 2 1 2. The boosted power is stored in the trigger capacitor 217 via the path of the primary coil 218a-the trigger capacitor 217-the resistance element 214-the diode 212. Secondly, the trigger switch 2 1 5 is closed in synchronization with the shutter operation of the camera that is performing the photography. In this way, the power stored in the trigger capacitor 2 1 7 is discharged. In this way, the current flowing through the primary coil 2 1a is used to induce the electromotive force in the secondary coil 218b. Among them, the number of turns of the secondary-side coil 2 1 8b is larger than the number of turns of the primary-side coil 2 1 8a, so the electromotive force induced in the secondary-side coil 2 1 8b is amplified. This large electromotive force is applied to the side electrode 21 6c of the arc tube 2 1 6 as a trigger voltage to excite the xenon gas enclosed in the arc tube 216 and pass through the (ten) side of the main capacitor 213-the anode 216a-the cathode 21 6b- > The discharge circuit on the (a) side of the main capacitor 213 discharges the electric power stored in the main capacitor 213, thereby generating a flash from the light-emitting tube 2 1 6. In this way, the flash is emitted. Figure 15 is different from the flash generating circuit shown in the conventional Figure 14. Please read the precautions on the back of this page).-Line · This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Centi) 494267 A7 B7 V. Circuit diagram of the flash generating circuit of the invention description (+). The same components as those in the flash light generating circuit 200 shown in FIG. 14 are given the same reference numerals. The (ten) output side of the booster circuit 2 1 1 constituting the flash generating circuit 2 1 0 shown in FIG. 15 is connected to the (ten) side of the main capacitor 2 1 3 via the diode 2 1 2 and the booster The (1) output side of the circuit 2 1 1 is connected to the (1) side of the main capacitor 2 1 3. In addition, on the (ten) side and (a) side of the main capacitor 213, a resistance element 2 1 4 and a trigger switch 2 1 9 connected in series are arranged. In addition, the (ten) side and (a) side of the main capacitor 213 are connected to the anode 216a and the cathode 2 1 6b of the light-emitting tube 216. The connection point of the resistance element 2 1 4 and the trigger switch 2 1 9 is connected to one end of the primary coil 2 18a of the trigger coil 2 1 8 via the trigger capacitor 2 1 7 and one end of the secondary coil 218b of the trigger coil 218 To the side electrode 2 1 6c of the arc tube 2 1 6. The other ends of the primary side coils 2 1 8a and the secondary side wires 2 1 8b are connected to the cathode 216b of the light-emitting tube 216 in common. In the flash circuit 2 10 configured in this way, when the trigger switch 2 19 is closed, the power stored in the trigger capacitor 217 is discharged, and in this way, the current flowing through the primary coil 2 1 8a is used, A large electromotive force is generated in the secondary coil 2 1 8b, and the electromotive force is applied to the side electrode 21 6c of the arc tube 216 as a trigger voltage to excite the xenon gas enclosed in the arc tube 216 and pass through the main capacitor 213 (ten ) Side—anode 216a—cathode 216b— (a) side of the main capacitor 213 discharges the electric power stored in the main capacitor 213 and is used to generate flash light from the light-emitting tube 216. [Problems to be solved by the invention] This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ---- 1 —— * ------ year II (Please read the note on the back first Matters written on this page) Order ·--丨 Line · Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 A7 B7 V. Description of the invention (4) In the above-mentioned flash generating circuit 200, 2 1 0, when the trigger switch 215,219 is closed When a trigger voltage is applied to the light-emitting tube 2 1 6, discharge is instantaneously started in the light-emitting tube 2 1 6, and the light emission is completed along a light emission curve (hereinafter referred to as an abrupt excitation light curve) that rises sharply with a large peak light amount and a short light emission time. In light emission according to the sharp light emission curve, it is generally difficult to perform exposure control with good accuracy by using a close-up flash. Especially in an automatic dimming flash generating device (equipped with an exposure adjustment circuit that is controlled to stop the flash light emission when the specified amount of light is reached), when the light amount is adjusted, the flash light emission duration is short because of the exposure adjustment circuit The response delay cannot follow the light emission of the flash, so there is a problem that the light amount adjustment of the automatic dimming flash generating device becomes quite difficult. In addition, in order to stop the light emission during the flash, a conventional technique is to arrange a non-contact switch in the discharge circuit through the light-emitting tube 2 16 to turn off the non-contact switch to stop light emission, but because the light emission The holding time is extremely short. To obtain the specified amount of light by flashing, it needs a very large current. Even if a contactless switch is configured in the discharge circuit, a large size and high cost must be used to withstand the large current. In addition, when light is emitted in accordance with a sharp light emission curve, the color temperature of the flash light becomes high, and light with a large blue component is emitted. In order to correct the color of the blue component during photo shooting, for example, a protector formed by applying a coloring treatment to a transparent plate needs to be disposed before the light-emitting portion, so there is a problem that the cost becomes high. In order to solve such a problem, a technique of adding a choke coil in the discharge circuit is proposed to stabilize the light emission curve. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm). Packing --- (Please read the precautions on the back to write this page VJmf) Order · · Line-Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printing 494267 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the Invention (r) Figure 16 is the conventionally formed by connecting the choke coil and the main capacitor in series, and connecting the gate fluid to the light-emitting tube. Circuit diagram of the flash generating circuit. In the flash generating circuit 220 shown in FIG. 16, the choke coil 221 and the main capacitor 213 are connected in series. In addition, the gate fluid 222 and the light-emitting tube 216 are connected in parallel. The gate of the gate fluid 222 is connected with a control terminal 224 for ON, OFF control of the gate fluid 222. In addition, on the (a) side of the gate of the gate fluid 222 and the main capacitor 213, a resistance element 223 is provided to adjust the gate voltage of the gate fluid 222. In the flash generating circuit 220, a control signal of the level "L" is input to the control terminal 224 at the first moment when the camera is powered on, and the fluid 222 is turned off. Power is stored in both the main capacitor 213 and the trigger capacitor 217. Among them, when the trigger switch 2 1 9 is closed, the electric power stored in the trigger capacitor 2 1 7 is discharged, and the current flowing in the primary-side coil 2 1 8a is used to generate an electromotive force in the secondary-side coil 2 1 8 b. The electromotive force is applied to the side electrode 2 1 6 c of the light-emitting tube 2 1 6 to excite the gas enclosed in the light-emitting tube 2 1 6 and pass through the (ten) side of the main capacitor 213-the choke coil 221-the anode 216 a-the cathode 21 6b- > The discharge circuit on the (a) side of the main capacitor 213 discharges the electric power stored in the main capacitor 213 for generating a flash from the light-emitting tube 216. Among them, since the choke coil 2 2 1 is provided in the discharge circuit, the peak of the current flowing in the light-emitting tube 2 1 6 is suppressed, so the light emission curve becomes stable, the temperature of the flash color decreases, and the light emission color becomes blue. Fewer people close to natural colors. (Please read the caution page on the back first) • Installation · This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) Printed by the Intellectual Property Bureau Employee Consumer Cooperative of the Ministry of Economic Affairs 494267 A7 B7 _ V. Invention Explanation (&) Secondly, the exposure adjustment circuit (not shown in the figure) of the automatic dimming flash generating device is used to integrate the amount of luminous light, and when the specified light amount is reached, the pulse signal of the 'H' level is input The control terminal 224 is used to turn on the brake fluid 222. Among them, the impedance of the ON state of the gate fluid 222 is smaller than the impedance (for example, 1/10) of the excited state of the light-emitting tube 216, so the power stored in the main capacitor 213 is blocked by the (ten) side of the main capacitor 213-the choke coil 22 1 —Balter fluid 222—The path on the (a) side of the main capacitor 213 is bypassed, thereby stopping light emission. Among them, the peak value of the current flowing in the smell fluid 222 is suppressed by the choke coil 221, so the gate fluid 222 may use a component with a smaller allowable current. In this way, high-accuracy light quantity control can be performed even at a short distance. Fig. 17 is a conventional circuit diagram of a flash generating circuit formed by connecting a choke coil and a thyristor in series at both ends of a main capacitor. In the flash generating circuit 23 0 shown in FIG. 17, a choke coil 22 1 and a gate fluid 222 are connected in series at both ends of the main capacitor 213. When the trigger switch 2 1 9 is closed, the power stored in the trigger capacitor 2 1 7 is discharged, and the current flowing in the primary coil 2 1 8a is used to generate an electromotive force in the secondary coil 2 1 8b. The electromotive force is applied to The side electrode 21 6c of the arc tube 2 1 8 is used to excite the xenon gas enclosed in the arc tube 216 and pass through the (ten) side of the main capacitor 213-the anode 216a-the cathode 216b-> the (a) side of the main capacitor 213 The discharge circuit discharges the power stored in the main capacitor 213 and is used to generate a flash from the light-emitting tube 216. Secondly, the exposure adjustment circuit (not shown in the figure) of the automatic dimming flash light emitting device is used to integrate the amount of luminous light. When the specified light amount is reached, the paper size is in accordance with China National Standard (CNS) A4 (210 X 297). Mm) -------------- install --- (please read the note on the back? Matters ^^ | ^ this page).; Line · Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed 494267 A7 B7 V. Description of the invention (7) Input the pulse signal of 'Η' level to the control terminal 2 2 4 to turn on the brake fluid 222. In this way, the electric power stored in the main capacitor 213 is bypassed through the (ten) side of the main capacitor 213-the choke coil 221-the sluice fluid 222-the (one) side of the main capacitor 2 1 3 and stops emitting light. In this manner, the use of the choke coil 22 1 can prevent a current having a large spike 値 from flowing in the gate fluid 222. However, in the above-mentioned flash generating circuits 220 and 23 0, since the choke coil 2 2 1 is added to suppress the peak of the current flowing in the light-emitting tube 2 16 and the thyristor 222, the cost increases and the substrate increases. The problem is that the circuit area becomes larger. The present invention is directed to the above problems, and an object thereof is to provide a flash light generating circuit which can reduce the cost and the circuit area of a substrate. [Means for Solving the Problem] The flash generating circuit of the present invention for achieving the above-mentioned object is characterized by having: a booster circuit; a main capacitor for storing the power boosted by the booster circuit; The power discharged from the main capacitor is used to emit light; and a trigger circuit having a trigger capacitor and a trigger coil, the primary coil of which is connected to the trigger capacitor to transmit the power flowing in the trigger capacitor to the secondary coil A trigger voltage is applied to the light-emitting tube; the primary-side coil of the trigger coil is arranged together with the light-emitting tube in a discharge circuit in which electric power discharged from the main capacitor flows. The flash generating circuit of the present invention is because the primary coil of the trigger coil is arranged together with the light-emitting tube in the current paper size of the power discharged from the main capacitor. The paper size applies to China National Standard (CNS) A4 (210 X 297 mm)- ------------- Equipment --- (Please read the precautions on the back page first) · --Line-Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 A7 ___B7 __ V. Invention Explanation (square) In the discharge circuit, the delay from the start of discharge of the arc tube to the peak of the amount of luminous light becomes the maximum, and the peak of the amount of luminous light is smaller, which can obtain a relatively stable luminous duration. Glowing curve. Therefore, there is no need to add a choke coil in the discharge circuit in order to obtain a smooth light-emitting curve, which can reduce the cost and the area of the circuit board. Among them, the primary coil of the trigger coil can also be arranged on the anode side of the light-emitting tube, or the primary coil of the trigger coil can also be arranged on the cathode side of the light-emitting tube. In this way, when the primary-side coil of the trigger coil is arranged on the anode side of the arc tube or on the cathode side of the arc tube, the degree of freedom in circuit design can be improved. In addition, the flash generating circuit of the present invention may be provided with a contactless switch in the discharge circuit. When a contactless switch is provided in the discharge circuit, the contactless switch is turned on at the light emission start timing, and a flash is emitted from the light emitting tube. When the specified amount of light is reached, the contactless switch is turned off to stop it. Flash, can perform the automatic dimming control of the automatic dimming flash generating device. When the contactless switch is provided, it is preferable to further include a bypass diode. When the contactless switch transitions from the ON state to the 0FF state, the primary coil of the trigger coil is used. The generated back-EMF bypasses the current. When the contactless switch uses the one with good performance that instantly transits from 0N state to 0FF state, the dimming performance can be improved. One of the trigger coils -10- This paper size applies the Chinese National Standard (CNS) A4 specification ( 210 X 297 public love) -----: ---.------ install --- (Please read the precautions on the back page first) -tr port, 丨 line · 494267 Intellectual Property Bureau of the Ministry of Economic Affairs Printed by employee consumer cooperative A7 ___ B7___ V. Description of the invention (?) The secondary coil generates a large back-EMF. Among them, when the bypass diode is provided, it is possible to prevent the non-contact switch from being damaged due to the back electromotive force generated directly from being applied to the non-contact switch. In addition, the triggering capacitor may also apply a voltage of a polarity between the anode and the cathode of the light-emitting tube to facilitate the flow of electric power discharged from the main capacitor at the timing of applying the trigger voltage to the light-emitting tube. Or it can be separated from the trigger capacitor, and it can also be equipped with a voltage-adding capacitor. At the timing of applying the trigger voltage to the light-emitting tube, between the anode and the cathode of the tube light tube, it is applied to promote the main capacitor. Discharge · The voltage of the polarity of electricity flow. When the voltage application capacitor is provided, it is preferable that the voltage application capacitor is connected with the main capacitor in series with the main capacitor when the trigger voltage is applied to the light-emitting tube. The voltage is applied between the anode and the cathode of the arc tube. When the timing of applying the trigger voltage to the arc tube and the voltage of the polarity is applied between the anode and cathode of the arc tube, applying the trigger voltage to the arc tube makes the arc tube easy to emit light, which can reduce the capacitance of the trigger capacitor or The trigger voltage decreases. In addition, the trigger capacitor may be maintained in a discharge state before the timing of applying the trigger voltage to the light emitting tube, and the trigger voltage may be applied to the light emitting tube through the trigger coil by using the power discharged from the main capacitor. In addition, the primary side coil of the trigger coil is preferably arranged in series with the main capacitor. When the primary coil of the trigger coil is configured to be connected in series with the main capacitor, -11- (Please read the precautions on the back first)-I write this page)-• Line-This paper size applies to China National Standard (CNS) A4 size (210 X 297 mm) The primary coil of the trigger coil acts as a choke coil, which is used to suppress the peak of the current flowing in the light-emitting tube, so that a smooth luminous curve can be obtained. In addition, the flash light generating device of the present invention may also be provided with a bypass circuit. For the current supplied from the main capacitor and flowing through the light-emitting tube, the current is passed through the light-emitting tube, and bypassing is performed to stop the positive current. Flow through the arc tube. When equipped with such a bypass circuit, it is possible to stop the flash from the light bulb in the middle. Therefore, light amount control can be performed. In addition, the bypass circuit may also have: a resistor configured to be connected in series with the light pipe; and a switching element arranged at a connection node between the resistor and one of the terminals of the light emitting tube and the other side of the light emitting tube Between the terminals, it is formed in parallel with the arc tube. When the bypass circuit has a resistor and a switching element configured in this way, a flash is emitted from the light-emitting tube, and both the primary coil and the resistance are used to suppress the peak of the current flowing in the light-emitting tube, and a more stable light-emitting curve can be obtained, and When the flash from the light emitting tube is stopped in the middle, the peak of the current flowing in the switching element can be suppressed. In addition, the bypass circuit may have a resistor configured in series with each other and a switching element for controlling ON and OFF of the bypass. When the bypass circuit has a resistor and the switching element arranged in series with each other, the flashing from the light-emitting tube is stopped halfway, and both the primary coil and the resistor can suppress the peak of the current flowing in the switching element. In addition, it can also be equipped with a dimming circuit, according to -12 flowing in the light-emitting tube. This paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 mm). Install --- (Please read the note on the back first Matters on this page) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives to print 494267 A7 —---- B7 ----5. Description of the invention (") Current, to detect the timing of the light emitted from the light tube to the specified amount of light In order to instruct the bypass circuit to bypass the current. When equipped with this type of dimming circuit, because the timing of the light from the light emitting tube can stop the flash from the light tube, it can achieve automatic dimming flash Generating device. In addition, the bypass circuit can also be freely mounted and removed in parallel to the light-emitting tube. In this way, the usual flash device (without stopping the flash light emission in the middle) and Automatic dimming flash generating device (auto flash device) (controlled to stop flashing light when the specified amount of light is reached) Both sides can be manufactured separately and assembled with a flash tube The circuit and the bypass circuit can share circuit parts, thereby simplifying the manufacturing process and reducing the man-hours for product management. In addition, it is connected to the frame device adapter (combined with the side assembly) Circuit circuit board) can realize the automatic flash device easily. [Embodiments of the invention] The embodiments of the present invention will be described below. The flash generating circuit equipped with a camera will be described here. The first figure shows the first of the present invention. The flash light generating circuit of the embodiment. The flash light generating circuit 10 shown in FIG. 1 is provided with a booster circuit Π connected to a built-in battery 1 for controlling the entire camera. The specified voltage is boosted to the voltage of battery 1. In addition, the flash generating circuit 10 is provided with a main capacitor 13 via a bipolar -13- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) -------------- Installation—— (Please read the precautions on the back page first.) .--- Line · Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives 494267 A7 Intellectual Property of the Ministry of Economic Affairs Bureau staff Printed by Fei Fangsha _____ B7 V. Description of the invention () The body 12 is used to store the power boosted by the boost circuit 11. The two ends of the main capacitor 1 3 are connected in series with a resistance element 14 and a trigger switch 1 5 In addition, the flash generating circuit 10 is provided with a trigger circuit 16 including a light-emitting tube 16-1, a trigger capacitor 16-2, and a trigger coil 16_3. The light-emitting tube 16-1 has an anode 16-6-1a, and a cathode 16 -1 b, and side electrode 16-lc, are filled with xenon (Xe) gas inside. The light-emitting tube 16-1 emits light using electric power discharged from the main capacitor 13. In addition, the configuration of the trigger coil 16_3 includes a specified number of turns The primary-side coil 16-3 a, and the secondary-side coil 16-3 b having a larger number of turns. One end of the primary-side coil 16_3a is connected to the anode 16--1a of the light-emitting tube 16--1. In addition, one end of the primary coil 16-3 a is connected to the connection point of the resistance element 14 and the trigger switch 15 through a trigger capacitor 16-2. On the other hand, one end of the secondary coil 1 6-3 b is connected to a side electrode 16-1 c of the light-emitting tube 16-1. The other ends of each of the secondary coil 16-3a and the secondary coil 16-3b are connected to the (ten) side of the main capacitor 13 in common. The trigger coil 16-3 is used to transmit the power flowing in the trigger capacitor 16-2 to the secondary-side coil 16-3b to apply a trigger voltage to the light-emitting tube 16-1. The primary-side coil 16- 3a is arranged in the discharge circuit L1 together with the light-emitting tube 16-1, and the power discharged from the main capacitor 13 flows therethrough. In the flash generating circuit 10 constructed in this way, first, the trigger switch 15 is opened, and the voltage from the built-in battery 1 is boosted by the booster circuit II. The boosted power is stored in the main capacitor 13 through the diode I2. In addition, the boosted power passes through the primary coil -14- I paper size applicable to China National Standard (CNS) A4 specifications (210 X 297 public love) _ " (Please read the note on the back first? Matters ^^^ 1 ^ 'This Page} Packing = 0-Line · Outside 4267 A7

V. Description of the invention (G) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 16-3a—Trigger capacitor 16_2—Resistance element 14—Diode 12 The path is also stored in trigger capacitor 16-2. Secondly, when shooting, in synchronization with the shutter action of the camera, the trigger switch 15 is closed. In this way, the voltage of the main capacitor 13 is applied to one terminal of the trigger capacitor 16-2 via the trigger switch 15. In this way, the output of the trigger capacitor 16-2 from the other end of the trigger capacitor 16-2 is higher than the applied voltage. The trigger capacitor 16- Positive voltage of the voltage part of 2. This positive voltage is applied to the electrode 16-la and the primary coil 16-3a of the light-emitting tube 16-1. In this way, the electric power stored in the trigger capacitor 16-2 is discharged, and a current flows through the primary coil 16-3a, and is used to generate electromotive force in the secondary coil 16-3b. Here, because the number of turns of the secondary coil 16-3 b is larger than the number of turns of the primary coil 16-3a, the electromotive force induced in the secondary coil 16-3b is amplified. This increased electromotive force is applied to the side electrode 16-1 c of the arc tube 16-1 as a trigger voltage to excite the xenon gas enclosed in the arc tube 16-1 through the (ten) side of the main capacitor 13— The primary side coil 16-3a—the anode 16-la—the discharge circuit L1 on the (a) side of the cathode main capacitor 13 emits the electric power stored in the main capacitor 13 and generates a flash from the light-emitting tube 16-1. In this way, the flash is emitted. In the flash generating circuit 10 of this embodiment, as described above, the trigger capacitor 16-2 is used to apply the trigger voltage to the light-emitting tube 1 6-1 when the trigger switch 15 is closed. The voltage of the flowing polarity of the electric power discharged by the capacitor 13 is used to make the anode 16-la and the cathode 16-lb of the light-emitting tube 16-1 to become the above positive -15 on the anode 16-la side. Standards apply to China National Standard (CNS) A4 specifications (210 X 297 mm) ----- · ---: ------ installation-(Please read the precautions on the back page first) · 丨 line · 494267 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the Invention (a) Voltage, the cathode 16-lb becomes negative voltage. Therefore, by using the trigger voltage applied to the light-emitting tube 16-1, the light-emitting tube 16-1 can be made to emit light easily. Fig. 2 shows the light emitting characteristics of the flash generating circuit 10 shown in Fig. 1 and the light emitting characteristics of the conventional flash generating circuit 200 shown in Fig. 14. Curve A shown in Fig. 2 is a light emission curve, and is used to indicate the light emission characteristics from the beginning to the end of light emission. On the other hand, the curve B is a light emission curve, which is used to represent the light emission characteristics of the flash light generating circuit 10 of this embodiment from the start to the end of light emission. In addition, there is no great difference between the integral 値 of the amount of light emission shown in the curve A and the integral 値 of the amount of light emission shown in the curve B. In the conventional flash generating circuit 200, as described with reference to FIG. 14, since only the light-emitting tube is arranged in the discharge circuit, the start of the instant of discharge in the light-emitting tube follows the rapid light-emitting circuit shown in curve A. Finish glowing. In light emission along such a sharp light emission curve, it is generally difficult to perform exposure control with good accuracy due to close-up flashes. In addition, when the color temperature of the flash light is high, since a large amount of blue component light is emitted, it is necessary to arrange a protective device formed by coloring a resin material in front of the light emitting portion, for example. On the other hand, in the flash light generating circuit 10 of this embodiment, the primary coil 16-3 a of the trigger coil 16-3 is arranged to be emitted from the main capacitor 13 since the light-emitting tube 1 6-1 In the discharge circuit L 1 where the electric power flows, as shown in the curve B in FIG. 2, the time from the discharge of the light-emitting tube 16-1 to the peak of the amount of light emitted becomes the maximum, and the peak of the amount of emitted light is delayed. It also becomes relatively small, forming this kind of luminous curve to maintain the hair. -16- Please read the notes on the back Γ This page) Binding · 丨 Line · This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (%) 494267 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of Invention (&) The light duration has become longer. In addition, the current 値 flowing in the light emitting tube 1 6-1 of the flash generating circuit 10 becomes smaller when compared with the current 流动 flowing in the light emitting tube of the conventional flash generating circuit 200, so the flash light is maintained while the flash is made. The color temperature is lowered, and the blue component of the luminous color is reduced to a natural color, and light with good characteristics suitable for photography can be obtained by itself. In addition, since the current 値 flowing through the arc tube 1 6 -1 becomes smaller, there is an advantage that the life of the arc tube 1 6 -1 can be extended. In addition, when compared with the conventional technique of adding a choke coil to the discharge circuit in order to obtain a smooth light emission curve, the cost can be reduced and the area of the substrate can be reduced. Fig. 3 shows a flash light generating circuit according to a second embodiment of the present invention. In addition, the same constituent elements as those of the flash generating circuit 10 shown in Fig. 1 are assigned the same reference numerals, and their characteristic parts will be described. The flash generating circuit 20 of this embodiment has a trigger capacitor 16-2. The discharge state is maintained until the timing at which the trigger voltage is applied to the arc tube 16-1. As the power discharged from the main capacitor 13 passes, the trigger voltage is applied to the arc tube 16-1 via the trigger coil 16-3. Between the anode 16-la and the cathode 16-lb of the light-emitting tube 16-1 constituting the flash generating circuit 20 shown in FIG. 3, a trigger capacitor 16 is connected in series from the anode 16-la side in order. -2 and trigger switch 1 5. A resistance element 14 is connected in parallel to the trigger capacitor 16-2. At the initial moment when power is added to the camera, the trigger switch 15 is opened, and after the power is turned on, the main capacitor 13 is charged. On the other hand, • 17- (please read the note on the back page first) Installation · ί-line-This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) Employees ’Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed 494267 A7 B7 ___ 5. Description of the invention (4) The triggering capacitor 16-2 is discharged. Secondly, the trigger switch 15 is turned on in synchronization with the shutter operation of the camera that is performing photography. In this way, the current flows through the path of the (ten) side of the main capacitor 13-the primary coil 16-3a-the triggering capacitor 16-2-the trigger switch 15-the (one) side of the main capacitor 13. Because the current flows through the primary coil 16-3a, the trigger voltage is applied from the secondary coil 16-3b to the side electrode 16-1c, and via the (ten) side of the main capacitor 13-the primary coil 16-3 a- Anode 16-lb—The discharge circuit L2 on the (a) side of the main capacitor 13 emits the electric power stored in the main capacitor 13 and is used to generate a flash from the light-emitting tube 16-1. In this way, when the trigger switch 15 is closed, the current is flowed to the primary coil 16-3a by using the power discharged from the main capacitor 13 to obtain the trigger voltage, and the trigger voltage can also be used. It is used to cause the light-emitting tube 16-1 to emit light. Fig. 4 shows a flash light generating circuit according to a third embodiment of the present invention. The flash light generating circuit 10 shown in FIG. 1 is the primary coil 16-3 a of the trigger coil 16-3 and is arranged on the anode 16-1 a side of the light-emitting tube 16-1, but is shown in Fig. 4 In the flash generating circuit 30 shown, the primary coil 16-3 a of the trigger coil 16-3 is arranged on the cathode 16-1 b side of the light-emitting tube 16-1. Further, a non-contact opening / closing 17 is arranged between the primary coil 16-3a and the main capacitor 13 in the discharge circuit L3. The contactless switch 17 has a control terminal 18 for controlling ON and OFF of the contactless switch 17. In addition, a resistance element 14 and a trigger capacitor 16-2 are connected in series to both ends of the main capacitor 13. The connection points of these resistance elements 14 and triggering capacitors 16-2 are connected to the cathode 16-lb -18 through the diode 16-4. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) %) ---------------- (Please read the precautions on the back page first) ·-Line · 494267 A7 _______B7___ 5. Description of the invention (V) and primary coil 16-3 a. In the flash generating circuit 30 of this embodiment, when the power is turned on at the initial time of the camera, a control signal of the 'L' level is input to the control terminal 18, so that the non-contact switch 17 is brought into the 0 F F state. Power is stored in both the main capacitor 13 and the trigger capacitor 16-2. Among them, in synchronization with the shutter operation of the camera that performs photography, a control signal of the 'H' level is input to the control terminal 18. As a result, the non-contact switch 17 is turned on, and the electric power stored in the trigger capacitor 16-2 is discharged through the diode 16-4-the secondary coil 16-3a-the non-contact switch 17. In this way, the current flowing through the primary coil 16-3a applies a trigger voltage from the primary coil 16-3b to the side electrode 16-1c, and passes through the (ten) side of the main capacitor 13-the anode 16-la. —Cathode 16-1 b- > —secondary coil 16-3a- > contactless switch 17—discharge circuit L3 on the (a) side of main capacitor 13 for discharging electric power stored in main capacitor 13, Thereby, a flash is generated from the light emitting tube 16-1. Secondly, the exposure adjustment circuit (not shown in the figure) of the automatic dimming flash light emitting device is used to integrate the amount of luminous light. When the specified light amount is reached, the control signal becomes the "L" level, and the non-contact switch 17 is turned off. , Stop glowing. By disposing the contactless switch 17 in the discharge circuit L3 in this way, by controlling the contactless switch 17, the light quantity control can be performed with high accuracy even at a short distance. Fig. 5 shows a flash light generating circuit according to a fourth embodiment of the present invention. In the flash generating circuit 40 shown in Fig. 5, a contactless switch 17 is arranged in the discharge circuit L4. In addition, the trigger capacitor 16-2 used to form the flash generating circuit 40 applies a trigger voltage of -19 to the light-emitting tube 16-1. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) (Please read the precautions on the back first-write this page)-Printed by the Consumers Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed 494267 A7 B7 V. Description of the invention (Maintain the discharge state before timing, use the main capacitor 1 3 The passing of the discharged electric power, the trigger voltage is applied to the light-emitting tube 16-1 through the trigger coil 1 6-3. Between the anode 16-la and the cathode 16-lb of the light-emitting tube 16-1, from the anode 1 6-1 a First, a diode 1 6-4 and a trigger switch 15 are connected in series in order. In addition, a resistive element 14 is connected in parallel to the trigger switch 15. In addition, a cathode 1 6-1 b and a main capacitor 1 3 There is a contactless switch 1 7. When the power is first applied to the camera, a control signal of level 'L' is input to the control terminal 1 8 and the contactless switch 17 is turned off. The main capacitor 13 is charged Until the other trigger capacitor 16-2 becomes The electrical state. Among them, in synchronization with the shutter action of the camera that is performing the photography, a control signal of the level “Η” is input to the control terminal 18. In this way, the non-contact switch 17 is turned ON and stored in the main capacitor The electric power of 1 3 is discharged through the primary coil 16-3a-the diode 16-4-the trigger capacitor 16_2-the non-contact switch 17. In this way, the current flowing in the primary coil 1 6-3 a Apply the trigger voltage from the secondary coil 1 6-3 b to the side electrode 16_lc and pass through the (ten) side of the capacitor 13-the primary coil i6-3a-the anode 16-la-the cathode 16-lb-no contact switch 17- > The discharge circuit 4 on the (a) side of the main capacitor 13 discharges the electric power stored in the main capacitor 13 and uses the light-emitting tube 16-1 to generate a flash. Secondly, when the specified amount of light is reached, the control signal The change becomes the "L" level, and the non-contact switch 17 is turned off to stop the light emission. This structure can also be used to control the light quantity with good accuracy. -20- This paper size applies to China National Standard (CNS) A4 Specifications (210 X 297 mm) ( Please read the note on the back page first) Binding: Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 A7 B7 Printed by the Employees’ Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Illustration of the Invention (a) Figure 6 shows The flash light generating circuit of the fifth embodiment. In the flash light generating circuit 50 shown in FIG. 6, a contactless switch 17 is arranged in the discharge circuit L5. In addition, a trigger capacitor 16- The polarity of 2 is the timing when the trigger voltage is applied to the light-emitting tube 16-1. Between the anode 16-la and the cathode 16-lb of the light-emitting tube 16-1, it promotes the flow of electric power discharged from the main capacitor 13. In the flash generating circuit 50, at the initial time, the control terminal 18 is input with a control signal of the level "L", and the non-contact switch 17 is turned off. Power is stored in the main capacitor 13 via the diode 12. In addition, the capacitor 16-2 for triggering also stores power via the diode 12-resistance element 14-triggering capacitor 16-2-secondary coil 16-3a-circuit element 16-6. Among them, in synchronization with the shutter operation of the camera that performs photography, a control signal of the 'H' level is input to the control terminal 18. As a result, the non-contact switch 17 becomes 0N, and the potential of one end of the trigger capacitor 16-2 (on the non-contact switch 17 side) drops sharply to the potential of the (one) side of the main capacitor 13. As a result, the negative voltage of the voltage part of the triggering capacitor 16-2 is output from the other end of the triggering capacitor 16-2 which is lower than the voltage on the (a) side of the main capacitor 13. This negative voltage is applied to the cathode 16-1 b, and the electric power stored in the trigger capacitor 16-2 is discharged through the non-contact switch 17- > diode 16-5-the primary coil 1 6-3a and used In this way, the current flowing through the primary coil 16-3a applies a trigger voltage to the side electrode 16-lc from the secondary coil 16-3b, and the power stored in the main capacitor 13 passes through the anode 16-la-cathode 16- lb——Secondary coil 16-3a—Diode 16-4—Discharge circuit L5 of non-contact switch 17 is released from light-emitting tube 16-1 -21- (Please read the precautions on the back first, write this page) i installed · -line · This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 494267 A7-B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. The invention description (w) produces a flash. In this way, when the contactless switch 17 is turned ON! At the timing of applying the trigger voltage to the light-emitting tube 16-1, between the anode 1 6 -1 a and the cathode 1 6 -1 b of the light-emitting tube 16 1, the anode 1 6 -1 a becomes a positive voltage and the cathode 1 6 -1 b becomes a negative voltage, because the polarity of the applied voltage promotes the flow of electric power discharged from the main capacitor 13, so in conjunction with the trigger voltage applied to the light-emitting tube 16-1, the light-emitting tube 16- 丨 can be easily lighted. . Next, when the specified light amount is reached, the control signal becomes the level of 'L', and the contactless switch 17 is turned off. With this structure, light quantity control with good accuracy can also be performed. Fig. 7 shows a flash light generating circuit according to a sixth embodiment of the present invention. In the flash generating circuit shown in FIG. 7, from the (ten) side of the main electric valley 1 3 in the discharge circuit L6, the light-emitting tubes 1 6 · 1 connected in series are arranged in order, and the trigger coil 16-3 The primary coil 16-3a, and the contactless switch 17. In addition, between the (ten) side and (a) side of the main capacitor 13, a series resistance element 14 and a trigger capacitor 16-2 are sequentially connected from the (ten) side in this order. The connection point between the resistance element 14 and the trigger capacitor 16-2 is connected to the connection point between the light-emitting tube 16-1 and the primary-side coil 16-3a. In addition, between the connection point of the trigger coil 1 6-3 and the non-contact switch 17, and the (ten) side of the main capacitor 13, the non-contact switch 17 is connected to the anode, and the main capacitor 13 is connected. Diodes 16 to 7 for bypass to the cathode. In the flash generating circuit 60, when the power is first supplied to the camera, a control signal of the level "L" is input to the control terminal 18, and the non-contact switch 17 is turned off. In addition, the main capacitor 1 3 and the trigger power -22- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back page N first)-• Wire '

494267 V. Description of the invention (w) Both sides of the container 16-2 store electric power. Among them, a control signal of a level of 'n' is input to the control terminal 18 in synchronization with the shutter operation of the camera which is performing photography. In this way, the non-contact switch 17 becomes ON, and the electric power stored in the trigger capacitor 16_2 is discharged through the primary coil 16-3 a-the non-contact switch 17. In this way, the current flowing through the primary coil 16-3 a is used to apply the trigger voltage from the secondary coil 16-3 b to the side electrode 16-1 c, and through the (ten) side of the main capacitor 13-anode 16-la—cathode 16-lb—secondary coil 16-3a—no-contact switch 17—discharge circuit L6 on the (a) side of the main controller 13 to discharge the power stored in the main capacitor 13 so as to emit light The tube 16_ 丨 produces a flash. Secondly, the exposure adjustment circuit (not shown in the figure) of the automatic dimming flash light emitting device is used to integrate the amount of light emitted. When the specified amount of light is reached, the control signal changes to the 'L' level, and the non-contact switch 17 is turned off. , Stop glowing. Among them, when the non-contact open point 17 is turned off, the current flowing in the primary coil 16-3 a is suddenly interrupted, and a large back electromotive force is generated in the primary coil i 6 _ 3 a. When the back electromotive force is directly applied to the non-contact switch 17, there is a problem that the non-contact switch 17 is destroyed. However, in the case of the flash generating circuit of the sixth embodiment shown in FIG. 7, it is because There is a bypass diode 16-7, so the current caused by the back electromotive force of the trigger coil 16-3 flowing through the bypass diode 16-7 can prevent the non-contact switch 1 Since a large voltage is applied due to the back electromotive force, the contactless switch 17 can be prevented from being damaged. When the flash generating circuit 3 of the third embodiment shown in FIG. 4 is used, 0 and -23- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ----- 1 --- ------- Install --- (Please read the precautions on the back of t first to write this page) Order ----- Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 A7 B7 Employee Consumption of the Intellectual Property Bureau of the Ministry of Economic Affairs Cooperative print 5. Description of the invention (") When comparing the flash light generating circuit 60 of the sixth embodiment shown in Fig. 7, there are two differences. One of them is that the flash light generating circuit 30 shown in FIG. 4 is not provided with the bypass diodes 16-7 included in the flash light generating circuit 60 shown in FIG. The difference is that it must be according to the magnitude of the current flowing in the light-emitting tube 1 6-1, the withstand voltage of the non-contact switch 17, and the transfer speed of the non-contact switch 17 from ON to OFF. The road diode 16-7, or even if the bypass diode is not provided, the contactless switch 17 will not be damaged. When it is designed to have a large current flowing in the light-emitting tube 1 6-1, or a case where the withstand voltage of the non-contact switch 17 is low, or the non-contact switch 17 is transferred from ON to OFF at a faster speed In a fast case, a bypass diode is required. In the opposite case, a bypass diode is not necessarily required. In addition, another difference between the flash light generating circuit 30 shown in FIG. 4 and the flash light generating circuit 60 shown in FIG. 7 is the flash light generating circuit 30 shown in FIG. 4, and the resistance element 14 and A connection point between the trigger capacitor 16-2 and a connection point between the light-emitting tube 16-1 and the primary coil 16-3a is provided with a diode 16-4. The flash light generating circuit 60 shown in FIG. 7 Then these are connected to each other. As described above, the non-contact switch 17 is turned on, and the light stored in the trigger capacitor 16-2 is discharged to start light emission. Therefore, after the light emission starts, the non-contact switch 17 is switched from ON. When it is turned off, the trigger capacitor 16-2 becomes empty. -24- (Please read the precautions on the back page first) Installation line · This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 494267 A7 ____ B7 V. Description of the invention (8) Among them, When the non-contact switch 17 is switched from ON to 0FF, the case of the flash generating circuit 30 shown in FIG. 4 is that the light emission is stopped at the timing of the transition, and the case of the flash generating circuit 60 shown in FIG. 7 Strictly stop emitting light at the timing of the transfer, and then charge the trigger capacitor 16-2, so stopping the light emission will tend to slightly overexpose the part. Therefore, a slight delay in light emission will cause a large exposure. For example, in the case of a flash generation circuit used in microphotography, it is best to have a diode 16-4. On the other hand, it is necessary to mount a camera that cannot take close-up photography. In this case, the diode 16-4 can be omitted to reduce the cost of the part. Fig. 8 shows a flash light generating circuit according to a seventh embodiment of the present invention. In the flash light generating circuit 70 shown in FIG. 8, in the discharge circuit L7, the light-emitting tube 16-1, the diode 16-4, and the trigger coil are arranged in series from the main capacitor 13 to (ten) in order. The primary coil 16-3a of 16-3, and the non-contact switch 17. In addition, a resistance element 14 is connected between the (ten) side of the main capacitor 13 and the connection point of the trigger coil 16-3 and the contactless switch 17, and the light-emitting tube 16-1 and the diode 16- The connection point of 4 is connected to the connection point of the trigger coil 16-3 and the contactless switch 17 with a voltage adding capacitor 16-8, and the connection point of the light-emitting tube 16-1 and the diode 16-4, and A resistive element 1 is connected between the (one) side of the main capacitor 13 and a trigger is connected between the connection point of the diode 1 6-4 and the primary coil 16-3a and the (one) side of the main capacitor 13 With capacitor 16-2. In the flash generating circuit 70, when the power is turned on at the beginning of the camera, a control signal of the "L" level is input to the control terminal 18, without a connection. -25- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -------------- Installation --- C Please read the Zhuyin Hua Xiang on the back of Tun Tun ΚΙΙ ^ Γ page) J ^ T. Line · Ministry of Economy Wisdom Printed by the employee's consumer cooperative of the Property Bureau Printed by the employee's cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 A7 B7 V. Description of the invention (4) Point switch 17 is OFF. In this state, electric power is stored in the main container 13, and electric power is also stored in the path of the voltage adding capacitors 16-8 through the resistance element 14—the voltage adding capacitor 1 6-8-> electronic component 19, and Power is also stored in the trigger capacitor 16-2 via the resistance element 14-primary coil 16-3 a- > the trigger capacitor 16-2. Among them, in synchronization with the shutter action of the camera that performs photography, a control signal of the 'H' level is input to the control terminal 18. As a result, the non-contact switch 17 becomes 0N, and one of the voltage adding capacitors 16-8 The potential (charged to the (ten) contactless switch 17 side) drops sharply to the potential of the (one) side of the main capacitor 13. As a result, the other end of the voltage addition capacitor 16-8 (the side of the light-emitting tube 16-1) becomes lower than the voltage on the (one) side of the main capacitor 13 and the voltage across the voltage addition capacitor 16-8 is negative. The negative voltage is applied to the cathode 1 6-1 b of the arc tube 1 6-1. Therefore, at this moment, the main capacitor 13 is applied between the anode 16-la and the cathode 16-lb of the arc tube 16-1. The sum of the charging voltage of the voltage adding capacitors 16-8, that is, a voltage approximately twice the charging voltage of the main capacitor. In addition, when the non-contact switch 17 is turned on, the electric power stored in the trigger capacitor 16-2 is discharged through the path of the primary coil 16-3a- > the non-contact switch 17 and the current is made in this way. Flows in the primary coil 1 6-3a to apply the trigger voltage from the secondary coil 1 6-3b to the side electrode 16-lc, and the power stored in the main capacitor 13 passes through the anode 16-la to the cathode 16-lb —Second emergency body 16-4—secondary coil 16-3a—discharge circuit L7 of non-contact switch 17 generates flashes from light-emitting tube 16-1. In the case of the flash generating circuit 70 shown in FIG. 8, the Chinese National Standard (CNS) A4 specification (210 X 297 mm) is applied to -26- this paper size --------- ----- Installation --- (Please read the precautions on the back before this page) .. Line 494267 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs V. Description of the invention (/) Luminescent tube 1 6- 1 The timing of applying the trigger voltage, using the effect of the voltage addition capacitor 16-8, between the anode 16-la and the cathode 16-lb of the light-emitting tube 16-1, the charging voltage of the main capacitor 1 3 is approximately doubled. This voltage, in combination with the trigger voltage applied to the arc tube 16-1, can emit light more reliably. Next, when the specified amount of light is reached, the control signal changes to the 'L' level, the contactless switch 17 is turned OFF, and the light emission is stopped. With this structure, light quantity control with good accuracy can also be performed. Fig. 9 shows a flash light generating circuit according to an eighth embodiment of the present invention. In the flash light generating circuit 80 shown in FIG. 9, the primary coil 16-3 a of the trigger coil 16-3 is arranged in series with the main capacitor 13. For the primary-side coil 16-3a and the main capacitor 13 arranged in series, the light-emitting tube 16-1 is arranged in parallel thereto. On both ends of the light-emitting tube 16-1, a series resistance element 14 and a trigger switch 81 are arranged. A trigger capacitor 16-2 is arranged between the connection point of the resistance element 14 and the trigger switch 81, and the connection point of the main capacitor 13 and the primary coil 16-3a. In addition, the secondary coil 16-3b of the trigger coil 16-3 is connected to the side electrodes 16-3 c of the light-emitting tube 16-1. In the flash generating circuit 80 configured in this way, first, when the trigger switch 81 is open, the power from the built-in battery 1 is boosted by the boost circuit circuit Π, and via the diode 12—the main capacitor 13— The path of the trigger coil 16-3a stores power in the main capacitor 13. In addition, through the path of the diode 12- > resistance element 14-trigger capacitor 16-2-primary coil 16-3a of the trigger coil 16-3, power is also stored in the trigger capacitor -27- (please first Read the note on the back? Matters

(This page)

Words Γ Liang This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 494267 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7___ V. Description of the Invention (Doo) 16-2. Next, the trigger switch 81 is turned on in synchronization with the shutter operation of the camera that is taking pictures. In this way, the electric power stored in the trigger capacitor is discharged, so that the current flows through the primary coil 16-3a to generate an electromotive force in the secondary coil 16-3b. The electromotive force is applied to the side of the light-emitting tube 16-1. The electrode 16-lc is used to excite the xenon gas enclosed in the light-emitting tube 16-1 through the (ten) side of the main capacitor 13-the anode 16-la-the cathode-the secondary coil i6-3a-the main capacitor 13 (a) The discharge circuit L8 on the side discharges the electric power stored in the main capacitor 13 to generate a flash from the light-emitting tube 16-1. Among them, because the primary coil 16-3a of the trigger coil 16-3 is configured in series with the main capacitor 13, the primary coil 16-3a acts as a choke coil to suppress the flow in the light emitter 1 6-1. The sharp peak of the current can get a smooth luminous curve. Fig. 10 shows a flash light generating circuit according to a ninth embodiment of the present invention. The flash light generating circuit 90 shown in Fig. 10 includes a circuit board 91 on which the above-mentioned flash light generating circuit 80 is incorporated. The circuit board 9 1 has connection terminals 9 1 -1, 9 1-2. The flash generating circuit 90 includes a circuit board 92 provided with connection terminals 92-1, 92-2. A bypass circuit 90-1 is incorporated in the circuit board 92, and is composed of a sluice 93 and a resistance element 94 connected to a gate of the sluice 93. The task of the bypass circuit 90-1 is to make the current flowing through the light-emitting tube 16-6 -1 to the autonomous capacitor 13 to bypass the current while flowing through the light-emitting tube 16-1. Stop the current from flowing through the arc tube 16-1. -28- This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the note on the back page first) i-pack. 494267 A7 __ B7 Printed by the Employees' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs V. Description of the invention (> 7) In addition, a dimming circuit 95 is assembled on the circuit substrate 92, and the timing of detecting the light emitted from the light-emitting tube 16_ 丨 by a specified amount of light is detected according to the current flowing through the light-emitting tube 16-1. The bypass circuit 90-1 is instructed to bypass the current. The dimming circuit 90-1 is generated by a light receiving sensor 95-1, a capacitor 95-2, a switching element 95-3, an amplifier 95-4, a variable resistor 95-5, a comparator 95-6, and a trigger pulse. Yi 95-7 composition. The light receiving sensor 95-1 receives the flash from the light emitting tube 16-1. The capacitor 95-2 stores a charge corresponding to the amount of light received by the light receiving sensor 95-1. The switching element 95-3 is controlled to be in an ON state before a flash is generated from the light-emitting tube 16-1, to discharge the residual charge remaining in the capacitor 95-2, and to be in an OFF state when a flash is generated. To store the charge in the capacitor 95-2. The amplifier 95-5 amplifies to a voltage corresponding to the charge of the capacitor 95-2. The variable resistor 95-5 is used to set the critical threshold corresponding to the sensitivity, aperture, desired brightness, etc. of the film. The comparator 95-6 takes as input the voltage from the amplifier 95-4 and the threshold value set by the variable resistor 95-5. When the voltage from the amplifier 95-4 exceeds the threshold value, it outputs 'H' Level signal. The trigger pulse wave generator 95-7 receives a signal from the 'H' level of the comparator 95-6 to output a trigger pulse wave. The operation of the flash generating circuit 90 will be described below. The operation before the trigger switch 8 1 is closed to generate a flash from the light-emitting tube 16-1 is the same as the operation of the flash circuit 80 described above, so its description is omitted. When a flash is generated from the light emitting tube 16-1, the flash is received by the light receiving sensor 95-1, and a charge corresponding to the amount of light received is stored in the capacitor 95-2. Amplifier 95_4 -29- (Please read the precautions on the back first and then ^ this page)

· -Line · This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 public love) 494267 A7 B7 V. Description of the invention) Amplify to the voltage corresponding to the charge. The amplified voltage is input to the positive (ten) terminal of the voltage comparator 95-6. The critical value is input to the inverting (a) terminal of the comparator 95-6. The comparator 95-6 is used to compare these voltages with the critical threshold. When the voltage from the amplifier 95-4 exceeds the critical threshold, the signal of the 'H' level is directed toward the trigger pulse generator 95-7. Output. In this way, the trigger pulse wave is output from the trigger pulse wave generator 95-7. The trigger pulse wave output from the trigger pulse wave generator 95-7 is input to the gate of the gate fluid 93. In this way, the alarm fluid 93 becomes ON state, and the electric power stored in the main capacitor 13 is from the (ten) side of the main capacitor 13 through the connection terminal 91-1-connection terminal 92-1-brake fluid 93-in order. The connection terminal 92-2—the connection terminal 91-2—the trigger coil 16-3—the secondary coil 16-3a—the path on the (one) side of the main capacitor 13 is bypassed. In this way, since the current supplied from the main capacitor 13 through the light-emitting tube 16-1 flows to the bypass circuit 90-1, the current stops flowing to the light-emitting tube 16-1 and thus stops emitting light. Among them, since the primary coil 16-3a of the trigger coil 16-3 serves as a choke coil, it is possible to prevent a current with a large spike from flowing in the gate fluid 93. In the flash generating circuit 90 of this embodiment, since the primary coil 16-3a of the trigger coil 16-3 is configured in series with the main capacitor 13, a flash is generated from the light-emitting tube 16-1, and the secondary coil 16 can be suppressed. -3a The peak of the current flowing to the light-emitting tube 1 6 -1 is obtained to obtain a more stable luminous curve, and when the amount of light is controlled, because the peak of the current flowing in the sluice 93 is suppressed, the sluice 93 may use only Small current-resistant ruler -30- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back first

(This page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 494267 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 ___ 5. Description of invention (>?) The smaller the size, the lower the cost. In addition, since the dimming circuit 95 is provided, the realized automatic dimming flash light generating device can be controlled to stop the flash light emission when the specified amount of light is reached. In addition, in the flash light generating circuit 90 of this embodiment, the circuit board 92 in which the bypass circuit 90-1 and the dimming circuit 95 are assembled is configured to be freely attachable / detachable to the light emitting tube 16 in which it is assembled. -1 and other circuit boards 91. Therefore, for cameras that are equipped with a normal flash device (the light emission does not stop halfway) and an automatic dimming flash generating device (auto flash device) (that is controlled to stop flashing when the specified amount of light is reached) During the manufacturing of both cameras, the circuit board 91 and the circuit board 92 can be manufactured separately, and parts can be shared to simplify manufacturing processes and reduce man-hours for product management. In addition, a camera body incorporating a conventional flash device is equipped with a connector incorporating a circuit board 92, and a camera having an automatic flash device can be easily implemented. In addition, in the flash generating circuit 90 of this embodiment, the illustrated example is an example in which the gate fluid 93 is controlled by a signal from the dimming circuit 95, but it is not limited to this method, and a corresponding one to the guide NO. May also be used. Signal control gate fluid 93. Fig. 11 shows a flash light generating circuit according to a tenth embodiment of the present invention. The flash light generating circuit 100 shown in FIG. 11 is provided with a circuit board 101 and a resistive element 1 0 2 is arranged in series with the (ten) side of the main capacitor 13 and the anode 1 6 -1 of the light-emitting tube 1 6 -1. a between. In addition, between the connection point of the resistance element 102 and the anode 16-la of the light-emitting tube 16-1 and the cathode 16-lb of the light-emitting tube 16-1, via the connection terminals 101-2, 92-1 and -31 -(Please read the note on the back page first) Packing 1--I Line · This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 494267 A7 B7 Printed by the Employees' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs Fifth, description of the invention (w) Terminals 1 0 1-2,9 2-2 are provided with a brake fluid 9 3. Such a resistive element 102 and the thyristor 93 correspond to the bypass circuit of the present invention. Since the flash light generating circuit 100 of this embodiment has the resistance element 102 and the sluice 93 arranged in this way, when a flash light is generated from the light-emitting tube 16-1, the primary-side coil 1 6-3 a and the resistance element 10 are used. 2 The two sides are used to suppress the peak of the current flowing in the arc tube 1 6-1, so as to obtain a more stable luminous curve, and to stop the flash from the arc tube 1 6-1 in the middle. One side line 16-3a and Both sides of the resistance element 102 are used to suppress the peak of the current flowing in the gate fluid 93. Fig. 12 shows a flash generating circuit according to the eleventh embodiment of the present invention. The flash generating circuit 110 shown in FIG. 12 is provided between the anode 16-la and the cathode 16-lb of the light-emitting tube 16-1 through the connection terminals 91-1, 92-1 and 91-2, 92-2. The resistor element 111 and the gate fluid 93 for controlling ON and OFF of the bypass are arranged in series with each other. These resistance elements 111 and thyristors 93 correspond to the bypass circuit of the present invention. In the flash light generating circuit 1 10 of this embodiment, since such a resistance element 1 11 and a sluice 93 which are arranged in series with each other are provided, the flash light from the light-emitting tube 16-1 is stopped halfway, and the primary coil 16 is used. Both -3a and the resistance element 1 can suppress the peak value of the current flowing to the gate fluid 93. Fig. 13 shows a flash light generating circuit according to a twelfth embodiment of the present invention. The flash light generating circuit 120 shown in FIG. 13 inputs a series of pulse wave signals to the IGBT element 124, and performs pulse wave driving to generate flash light from the light emitting tube 1 6-1. The flash generating circuit 120 should be bound as shown in Figure 9 above-32- (Please read the precautions on the back page first). This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 494267 Α7 Β7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. When the flash generating circuit 80 of the invention description (w) is compared, the trigger switch 8 1 is replaced with the gate fluid 1 2 1 and the gate fluid 1 2 1 The gate is connected to a resistance element 1 22 and a control terminal 123. In addition, an IGBT (Insulated Gate Bipolar Transistor) element 124 is disposed in the discharge circuit L9, the collector of which is connected to the cathode 16-1 b of the light-emitting tube 16-1, and the emitter is connected to the primary coil of the trigger coil 16-3. 16-3a is connected to the (a) side of the main capacitor 13. A control terminal 125 is connected to a gate of the IGBT element 124. In the flash generating circuit 120 configured in this way, at the first time when the power is turned on to the camera, a control signal of the level "L" is input to the control terminal 123, and the sluice 121 becomes an OFF state. In addition, the power from the built-in battery 1 is boosted by the booster circuit 11 and is stored in the main via the path of the diode 12- > main capacitor 13 •-primary coil 16-3a of the trigger coil 16-3 Capacitor 13. In addition, power is also stored in the trigger capacitor 16-2 using the path of the diode 12-the resistance element 14-the trigger capacitor 16-2-the primary coil 16-3 a of the trigger coil 16-3. Next, in synchronization with the shutter operation of the camera, a trigger pulse is applied to the control terminal 123. In addition, a series of pulse wave signals are input to the control terminal 125. Since the trigger pulse is applied to the control terminals 1 23, the brake fluid 1 2 1 is turned on, and the electric power stored in the trigger capacitor 16-2 is released, and the current flowing through the primary coil 16-3a is used to An electromotive force is generated in the secondary coil 16-3b, and the electromotive force is applied to the side electrode 16-1c of the arc tube 16-1 to excite the xenon gas enclosed in the arc tube 16-c. On the other hand, because a series of pulse signals are also input to the control terminal 125, the IGBT element 124 follows the series of pulses -33- (Please read the precautions on the back first

(This page)

Words Γ This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 494267 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (π). The wave signal starts to switch. In this way, through the (ten) side of the main capacitor 1.3—anode 16-la—cathode 16-lb—IGBT element 124— > —secondary coil 16-3a—discharge circuit L9 on the (one) side of main capacitor 13 The power stored in the main capacitor 13 is emitted to generate a flash from the light-emitting tube 16-1. Among them, since the primary coil 16-3a of the trigger coil 16-3 is arranged in series with the main capacitor 13, the primary coil 16-3a can be used to suppress the current flowing in the IGBT element 124. Therefore, it is not necessary to provide a choke coil, and an IGBT element 124 having a small allowable current can be used, which can reduce the cost. [Effects of the Invention] As described above, according to the present invention, it is possible to reduce the cost and the area of the substrate circuit. [Brief Description of Drawings] Fig. 1 shows a flash light generating circuit according to a first embodiment of the present invention. Fig. 2 shows the light emission characteristics of the flash light generating circuit shown in Fig. 1 and the light emission characteristics of the conventional flash light generating circuit shown in Fig. 7. Fig. 3 shows a flash light generating circuit according to a second embodiment of the present invention. Fig. 4 shows a flash light generating circuit according to a third embodiment of the present invention. Fig. 5 shows a flash light generating circuit according to a fourth embodiment of the present invention. Fig. 6 shows a flash light generating circuit according to a fifth embodiment of the present invention. Fig. 7 shows a flash light generating circuit according to a sixth embodiment of the present invention. Fig. 8 shows a flash light generating circuit according to a seventh embodiment of the present invention. Fig. 9 shows a flash light generating circuit according to an eighth embodiment of the present invention. Fig. 10 shows a flash light generating circuit according to a ninth embodiment of the present invention. -34- (Please read the precautions on the back first-installation --- ^ this page) · --- · The paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 494267 A7 B7 V. Invention Explanation (ο) FIG. 11 shows a flash light generating circuit of the 10th embodiment of the present invention. Fig. 12 shows a flash generating circuit according to the eleventh embodiment of the present invention. Fig. 13 shows a flash light generating circuit according to a twelfth embodiment of the present invention. Fig. 14 shows a circuit diagram of a conventional flash generating circuit. Fig. 15 is a circuit diagram showing a conventional flash generating circuit different from the flash generating circuit shown in Fig. 14; Fig. 16 is a conventional circuit diagram of a flash generating circuit formed by connecting a choke coil and a main capacitor in series and connecting a gate fluid and a light emitting tube in parallel. Fig. 17 is a conventional circuit diagram of a flash generating circuit formed by connecting a choke coil and a thyristor in series at both ends of a main capacitor. DESCRIPTION OF SYMBOLS 1 ... Built-in batteries 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120 .... Flash generation circuit Π ... Boost circuit 12, 16-4, 16-5 ... Two Polar body 13… Main capacitor 1 4,1 6-6,94,1 02,1 1 1,1 22… Resistance element 15,81… Trigger switch 16… Trigger circuit 16-1… Light-emitting tube 1 6-1 a. .. Anode 16-lb ... Cathode 16-lc ... Side electrode-35- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ------------ --Install --- (Please read the precautions on the back before me page) Order.-丨 Line · Printed by Employee Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 494267 Printed by Employee Consumer Cooperative of Intellectual Property Bureau of Ministry of Economic Affairs A7 B7__ 五、 Explanation of invention (M) 16-2 ... Trigger capacitor 16-3 ... Trigger coil 16-3 a ...-- Secondary coil 16-3b ... Secondary coil 16-7 ... Bypass Diodes 16-8 ... Capacitors for voltage application 17 .. Contactless switches 1 8,1 23,1 25 ... Control terminals 90-1 ... Bypass circuits 91, 92, 101 ... Circuit substrates 91- 1,91-2,92-1,92-2,101-1,101-2 ... connecting terminal 9 3,1 2 1 ... brake fluid 95 ..... dimming circuit 95-1 ... light receiving sensor 95- 2... Container 9 5-3 ... Switching element 95-4 ... Amplifier 95-5 ... Variable resistor 95-6 ... Comparator 95-7 ... Trigger pulse generator 124 ..... 1. BT element ----- ： --------- Pack 11 (Please read the note on the back? Matters and then this page). 丨 Line · -36- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

494267 A8 B8 C8 D8 6. Scope of patent application 1. A flash generating circuit, which is characterized by having: a booster circuit; -------------- install --- (please read the back first (Notes on this page) The main capacitor is used to store the power boosted by the booster circuit; the light-emitting tube uses the power released from the main electric power valley Muyi to emit light; and the trigger circuit has a trigger A capacitor and a trigger coil, the primary coil of which is connected to the trigger capacitor, and is used to transmit the power flowing in the trigger capacitor to the secondary coil to apply a trigger voltage to the light-emitting tube; the primary side of the trigger coil The coil is arranged together with the light-emitting tube in a discharge circuit through which electric power discharged from the main capacitor flows. 2. The flash generating circuit according to item 1 of the patent application, wherein the primary coil of the trigger coil is arranged on the anode side of the light-emitting tube. 3. For the flash light generating circuit of the first patent application, wherein the primary coil of the trigger coil is arranged on the cathode side of the light-emitting tube. • Wire-4. If the flash generating circuit of item 1 of the patent application scope, there is a contact switch in the discharge circuit. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. If the flash generating circuit in the scope of patent application No. 4 is equipped with a bypass diode, when the contactless switch moves from the ON state to the OFF state, The back electromotive force generated by the primary coil of the trigger coil is used to bypass the current. 6. If the flash generating circuit of item 1 of the patent application scope, wherein the triggering valley is used to describe the timing of applying the trigger voltage to the light-emitting tube, between the anode and the cathode of the light-emitting tube, it is applied to promote the The main capacitor discharge -37- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 494267 A8 B8 C8 D8 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Voltage of flowing polarity. 7. If the flash generating circuit according to item 1 of the scope of the patent application, it is provided with a voltage-adding capacitor to apply a trigger voltage to the light-emitting tube at a timing between the anode and the cathode of the light-emitting tube to be applied to promote the The voltage of the polarity of the current flowing from the main capacitor. 8. The flash generating circuit according to item 7 in the scope of the patent application, wherein the voltage-adding capacitor is used to apply the contact voltage to the light-emitting tube at the timing of applying the contact voltage with the main capacitor between the anode and the cathode of the light-emitting tube. Apply the voltage when the main capacitor and the voltage adding capacitor are connected in series. 9. The flash generating circuit according to item 1 of the patent application range, wherein the trigger capacitor maintains a discharge state before the timing of applying the trigger voltage to the light-emitting tube, and uses the power discharged from the main capacitor to pass through the trigger coil pair. The arc tube applies a trigger voltage. 10. The flash generating circuit according to item 1 of the patent application scope, wherein the primary coil of the trigger coil is configured in series with the main capacitor. 11. For example, the flash light generating circuit in the scope of the patent application includes a bypass circuit. For the current supplied from the main capacitor through the light-emitting tube, the current is passed through the light-emitting tube. To stop the current from flowing through the arc tube. 12. The flash generating circuit according to item 11 of the patent application scope, wherein the bypass circuit has: a resistor configured to be connected in series with the light-emitting tube; and a switching element configured between the resistor and one of the terminals of the light-emitting tube The connection between the connection node and the other terminal of the light-emitting tube forms the light-38- (Please read the precautions on the back before this page) -Installation · Threads · This paper size applies to Chinese National Standards (CNS) A4 specification (210 X 297 mm) 494267 A8 B8 C8 D8 Six, patent application scope Tubes are connected in parallel. 13. The flash generating circuit according to item 11 of the scope of patent application, wherein the bypass circuit has a resistor configured in series with each other and a switching element of 0N, 0FF for controlling the bypass. 14. For example, the flash generating circuit in the scope of application for patent No. 11 includes a dimming circuit, which detects the timing of the light emitted from the light emitting tube with a specified amount of light according to the current flowing to the light emitting tube, thereby referring to the circuit of the aromatic circuit. Bypass current. 15. For the flash generating circuit according to item 11 of the patent application, wherein the bypass circuit can be freely installed and removed, and connected in parallel to the light-emitting tube. ------------- Equipment—— (Please read the Note Boxing on the back and then on this page) Order · · -1 Line-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs > 39- This paper size applies to China National Standard (CNS) A4 (210 X 297 public love)